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-rw-r--r--.gitignore26
-rw-r--r--.gitmodules3
-rw-r--r--AUTHORS4
-rw-r--r--COPYING661
-rw-r--r--ChangeLog0
-rw-r--r--INSTALL370
-rw-r--r--Makefile.am3
-rw-r--r--NEWS0
-rw-r--r--README0
-rwxr-xr-xbootstrap2
-rw-r--r--configure.ac156
-rw-r--r--contrib/mint-template/README1
-rw-r--r--contrib/mint-template/config/mint-common.conf6
-rw-r--r--contrib/mint-template/config/mint-keyup.conf79
-rw-r--r--doc/.gitignore12
-rw-r--r--doc/Makefile.am5
-rw-r--r--doc/logos/ai/logotalerv2.ai3474
-rw-r--r--doc/logos/eps/icon_taler.epsbin0 -> 242881387 bytes
-rw-r--r--doc/logos/eps/logo_taler.epsbin0 -> 10731812 bytes
-rwxr-xr-xdoc/logos/fonts/OldNewspaperTypes.ttfbin0 -> 85804 bytes
-rw-r--r--doc/logos/fonts/perpetue/Perpetua Bold Italic.ttfbin0 -> 75620 bytes
-rw-r--r--doc/logos/fonts/perpetue/Perpetua Bold.ttfbin0 -> 58512 bytes
-rw-r--r--doc/logos/fonts/perpetue/Perpetua Italic.ttfbin0 -> 76080 bytes
-rw-r--r--doc/logos/fonts/perpetue/Perpetua.ttfbin0 -> 60216 bytes
-rwxr-xr-xdoc/logos/fonts/smoth_bight/End User Licence Agreement.txt133
-rwxr-xr-xdoc/logos/fonts/smoth_bight/Licencia de la fuente - Version en Espa§ol.txt77
-rwxr-xr-xdoc/logos/fonts/smoth_bight/Smoth-Bight - Por Kustren.otfbin0 -> 50396 bytes
-rwxr-xr-xdoc/logos/fonts/smoth_bight/Smoth-Bight Italic - Por Kustren.otfbin0 -> 50820 bytes
-rw-r--r--doc/logos/ico/favicon1616.icobin0 -> 1150 bytes
-rw-r--r--doc/logos/ico/favicon4848.icobin0 -> 15086 bytes
-rw-r--r--doc/logos/png/icon_taler.pngbin0 -> 1835737 bytes
-rw-r--r--doc/logos/png/logo_taler.pngbin0 -> 377176 bytes
-rw-r--r--doc/paper/.latexmkrc15
-rw-r--r--doc/paper/taler.bib94
-rw-r--r--doc/paper/taler.tex995
-rw-r--r--src/.gitignore9
-rw-r--r--src/Makefile.am2
-rw-r--r--src/include/Makefile.am7
-rw-r--r--src/include/platform.h56
-rw-r--r--src/include/taler_db_lib.h132
-rw-r--r--src/include/taler_json_lib.h101
-rw-r--r--src/include/taler_microhttpd_lib.h119
-rw-r--r--src/include/taler_mint_service.h303
-rw-r--r--src/include/taler_rsa.h357
-rw-r--r--src/include/taler_signatures.h106
-rw-r--r--src/include/taler_types.h120
-rw-r--r--src/include/taler_util.h255
-rw-r--r--src/mint/.gitignore6
-rw-r--r--src/mint/Makefile.am131
-rw-r--r--src/mint/mint.h198
-rw-r--r--src/mint/mint_api.c1121
-rw-r--r--src/mint/mint_common.c283
-rw-r--r--src/mint/mint_db.c1838
-rw-r--r--src/mint/mint_db.h344
-rw-r--r--src/mint/taler-mint-dbinit.c285
-rw-r--r--src/mint/taler-mint-httpd.c376
-rw-r--r--src/mint/taler-mint-httpd.h106
-rw-r--r--src/mint/taler-mint-httpd_deposit.c270
-rw-r--r--src/mint/taler-mint-httpd_deposit.h48
-rw-r--r--src/mint/taler-mint-httpd_keys.c512
-rw-r--r--src/mint/taler-mint-httpd_keys.h155
-rw-r--r--src/mint/taler-mint-httpd_mhd.c300
-rw-r--r--src/mint/taler-mint-httpd_mhd.h132
-rw-r--r--src/mint/taler-mint-httpd_refresh.c1497
-rw-r--r--src/mint/taler-mint-httpd_refresh.h103
-rw-r--r--src/mint/taler-mint-httpd_withdraw.c400
-rw-r--r--src/mint/taler-mint-httpd_withdraw.h65
-rw-r--r--src/mint/taler-mint-keycheck.c169
-rw-r--r--src/mint/taler-mint-keyup.c657
-rw-r--r--src/mint/taler-mint-reservemod.c215
-rw-r--r--src/mint/test_mint_api.c211
-rw-r--r--src/mint/test_mint_common.c83
-rw-r--r--src/mint/test_mint_deposits.c149
-rw-r--r--src/mint/test_mint_nayapaisa.eccbin0 -> 32 bytes
-rw-r--r--src/mint/test_mint_nayapaisa/README1
-rw-r--r--src/mint/test_mint_nayapaisa/config/mint-common.conf6
-rw-r--r--src/mint/test_mint_nayapaisa/config/mint-keyup.conf79
-rw-r--r--src/mint/test_mint_nyadirahim.ecc1
-rw-r--r--src/mint/test_mint_nyadirahim/README1
-rw-r--r--src/mint/test_mint_nyadirahim/config/mint-common.conf6
-rw-r--r--src/mint/test_mint_nyadirahim/config/mint-keyup.conf79
-rw-r--r--src/util/Makefile.am39
-rw-r--r--src/util/db.c196
-rw-r--r--src/util/json.c194
-rw-r--r--src/util/microhttpd.c417
-rw-r--r--src/util/misc.supp28
-rw-r--r--src/util/rsa.c925
-rw-r--r--src/util/test_hash_context.c48
-rw-r--r--src/util/test_rsa.c112
-rw-r--r--src/util/util.c528
90 files changed, 19997 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..6fe51488
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,26 @@
+*~
+*Makefile.in
+*Makefile
+aclocal.m4
+autom4te.cache
+autoscan.log
+compile
+configure
+depcomp
+missing
+taler_config.h.in
+install-sh
+config.log
+config.status
+stamp-h1
+taler_config.h
+config.guess
+config.sub
+libtool
+ltmain.sh
+test-driver
+m4/
+GPATH
+GRTAGS
+GTAGS
+*.swp
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..7625aa98
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "doc/api"]
+ path = doc/api
+ url = git@git.taler.net:api
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 00000000..75e08df1
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,4 @@
+Sree Harsha Totakura <sreeharsha@totakura.in>
+Florian Dold
+Christian Grothoff <christian@grothoff.org>
+Benedikt Mueller
diff --git a/COPYING b/COPYING
new file mode 100644
index 00000000..dba13ed2
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,661 @@
+ GNU AFFERO GENERAL PUBLIC LICENSE
+ Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+ When we speak of free software, we are referring to freedom, not
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+ Developers that use our General Public Licenses protect your rights
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+ A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
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+ The GNU Affero General Public License is designed specifically to
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+covered work, you indicate your acceptance of this License to do so.
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+ 10. Automatic Licensing of Downstream Recipients.
+
+ Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License. You are not responsible
+for enforcing compliance by third parties with this License.
+
+ An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+ You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+ 11. Patents.
+
+ A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+ A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+ Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+ In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+ If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+ If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+ A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License. You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+ Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Remote Network Interaction; Use with the GNU General Public License.
+
+ Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software. This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time. Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/ChangeLog
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 00000000..20998407
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,370 @@
+Installation Instructions
+*************************
+
+Copyright (C) 1994-1996, 1999-2002, 2004-2013 Free Software Foundation,
+Inc.
+
+ Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved. This file is offered as-is,
+without warranty of any kind.
+
+Basic Installation
+==================
+
+ Briefly, the shell command `./configure && make && make install'
+should configure, build, and install this package. The following
+more-detailed instructions are generic; see the `README' file for
+instructions specific to this package. Some packages provide this
+`INSTALL' file but do not implement all of the features documented
+below. The lack of an optional feature in a given package is not
+necessarily a bug. More recommendations for GNU packages can be found
+in *note Makefile Conventions: (standards)Makefile Conventions.
+
+ The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation. It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions. Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+ It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring. Caching is
+disabled by default to prevent problems with accidental use of stale
+cache files.
+
+ If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release. If you are using the cache, and at
+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+ The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'. You need `configure.ac' if
+you want to change it or regenerate `configure' using a newer version
+of `autoconf'.
+
+ The simplest way to compile this package is:
+
+ 1. `cd' to the directory containing the package's source code and type
+ `./configure' to configure the package for your system.
+
+ Running `configure' might take a while. While running, it prints
+ some messages telling which features it is checking for.
+
+ 2. Type `make' to compile the package.
+
+ 3. Optionally, type `make check' to run any self-tests that come with
+ the package, generally using the just-built uninstalled binaries.
+
+ 4. Type `make install' to install the programs and any data files and
+ documentation. When installing into a prefix owned by root, it is
+ recommended that the package be configured and built as a regular
+ user, and only the `make install' phase executed with root
+ privileges.
+
+ 5. Optionally, type `make installcheck' to repeat any self-tests, but
+ this time using the binaries in their final installed location.
+ This target does not install anything. Running this target as a
+ regular user, particularly if the prior `make install' required
+ root privileges, verifies that the installation completed
+ correctly.
+
+ 6. You can remove the program binaries and object files from the
+ source code directory by typing `make clean'. To also remove the
+ files that `configure' created (so you can compile the package for
+ a different kind of computer), type `make distclean'. There is
+ also a `make maintainer-clean' target, but that is intended mainly
+ for the package's developers. If you use it, you may have to get
+ all sorts of other programs in order to regenerate files that came
+ with the distribution.
+
+ 7. Often, you can also type `make uninstall' to remove the installed
+ files again. In practice, not all packages have tested that
+ uninstallation works correctly, even though it is required by the
+ GNU Coding Standards.
+
+ 8. Some packages, particularly those that use Automake, provide `make
+ distcheck', which can by used by developers to test that all other
+ targets like `make install' and `make uninstall' work correctly.
+ This target is generally not run by end users.
+
+Compilers and Options
+=====================
+
+ Some systems require unusual options for compilation or linking that
+the `configure' script does not know about. Run `./configure --help'
+for details on some of the pertinent environment variables.
+
+ You can give `configure' initial values for configuration parameters
+by setting variables in the command line or in the environment. Here
+is an example:
+
+ ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+ *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+ You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory. To do this, you can use GNU `make'. `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script. `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'. This
+is known as a "VPATH" build.
+
+ With a non-GNU `make', it is safer to compile the package for one
+architecture at a time in the source code directory. After you have
+installed the package for one architecture, use `make distclean' before
+reconfiguring for another architecture.
+
+ On MacOS X 10.5 and later systems, you can create libraries and
+executables that work on multiple system types--known as "fat" or
+"universal" binaries--by specifying multiple `-arch' options to the
+compiler but only a single `-arch' option to the preprocessor. Like
+this:
+
+ ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+ CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+ CPP="gcc -E" CXXCPP="g++ -E"
+
+ This is not guaranteed to produce working output in all cases, you
+may have to build one architecture at a time and combine the results
+using the `lipo' tool if you have problems.
+
+Installation Names
+==================
+
+ By default, `make install' installs the package's commands under
+`/usr/local/bin', include files under `/usr/local/include', etc. You
+can specify an installation prefix other than `/usr/local' by giving
+`configure' the option `--prefix=PREFIX', where PREFIX must be an
+absolute file name.
+
+ You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files. If you
+pass the option `--exec-prefix=PREFIX' to `configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+ In addition, if you use an unusual directory layout you can give
+options like `--bindir=DIR' to specify different values for particular
+kinds of files. Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them. In general, the
+default for these options is expressed in terms of `${prefix}', so that
+specifying just `--prefix' will affect all of the other directory
+specifications that were not explicitly provided.
+
+ The most portable way to affect installation locations is to pass the
+correct locations to `configure'; however, many packages provide one or
+both of the following shortcuts of passing variable assignments to the
+`make install' command line to change installation locations without
+having to reconfigure or recompile.
+
+ The first method involves providing an override variable for each
+affected directory. For example, `make install
+prefix=/alternate/directory' will choose an alternate location for all
+directory configuration variables that were expressed in terms of
+`${prefix}'. Any directories that were specified during `configure',
+but not in terms of `${prefix}', must each be overridden at install
+time for the entire installation to be relocated. The approach of
+makefile variable overrides for each directory variable is required by
+the GNU Coding Standards, and ideally causes no recompilation.
+However, some platforms have known limitations with the semantics of
+shared libraries that end up requiring recompilation when using this
+method, particularly noticeable in packages that use GNU Libtool.
+
+ The second method involves providing the `DESTDIR' variable. For
+example, `make install DESTDIR=/alternate/directory' will prepend
+`/alternate/directory' before all installation names. The approach of
+`DESTDIR' overrides is not required by the GNU Coding Standards, and
+does not work on platforms that have drive letters. On the other hand,
+it does better at avoiding recompilation issues, and works well even
+when some directory options were not specified in terms of `${prefix}'
+at `configure' time.
+
+Optional Features
+=================
+
+ If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+ Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System). The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+ For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+ Some packages offer the ability to configure how verbose the
+execution of `make' will be. For these packages, running `./configure
+--enable-silent-rules' sets the default to minimal output, which can be
+overridden with `make V=1'; while running `./configure
+--disable-silent-rules' sets the default to verbose, which can be
+overridden with `make V=0'.
+
+Particular systems
+==================
+
+ On HP-UX, the default C compiler is not ANSI C compatible. If GNU
+CC is not installed, it is recommended to use the following options in
+order to use an ANSI C compiler:
+
+ ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
+
+and if that doesn't work, install pre-built binaries of GCC for HP-UX.
+
+ HP-UX `make' updates targets which have the same time stamps as
+their prerequisites, which makes it generally unusable when shipped
+generated files such as `configure' are involved. Use GNU `make'
+instead.
+
+ On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
+parse its `<wchar.h>' header file. The option `-nodtk' can be used as
+a workaround. If GNU CC is not installed, it is therefore recommended
+to try
+
+ ./configure CC="cc"
+
+and if that doesn't work, try
+
+ ./configure CC="cc -nodtk"
+
+ On Solaris, don't put `/usr/ucb' early in your `PATH'. This
+directory contains several dysfunctional programs; working variants of
+these programs are available in `/usr/bin'. So, if you need `/usr/ucb'
+in your `PATH', put it _after_ `/usr/bin'.
+
+ On Haiku, software installed for all users goes in `/boot/common',
+not `/usr/local'. It is recommended to use the following options:
+
+ ./configure --prefix=/boot/common
+
+Specifying the System Type
+==========================
+
+ There may be some features `configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on. Usually, assuming the package is built to be run on the
+_same_ architectures, `configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+`--build=TYPE' option. TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+ CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+ OS
+ KERNEL-OS
+
+ See the file `config.sub' for the possible values of each field. If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+ If you are _building_ compiler tools for cross-compiling, you should
+use the option `--target=TYPE' to select the type of system they will
+produce code for.
+
+ If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+ If you want to set default values for `configure' scripts to share,
+you can create a site shell script called `config.site' that gives
+default values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists. Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+ Variables not defined in a site shell script can be set in the
+environment passed to `configure'. However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost. In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'. For example:
+
+ ./configure CC=/usr/local2/bin/gcc
+
+causes the specified `gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for `CONFIG_SHELL' due to
+an Autoconf limitation. Until the limitation is lifted, you can use
+this workaround:
+
+ CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+`configure' Invocation
+======================
+
+ `configure' recognizes the following options to control how it
+operates.
+
+`--help'
+`-h'
+ Print a summary of all of the options to `configure', and exit.
+
+`--help=short'
+`--help=recursive'
+ Print a summary of the options unique to this package's
+ `configure', and exit. The `short' variant lists options used
+ only in the top level, while the `recursive' variant lists options
+ also present in any nested packages.
+
+`--version'
+`-V'
+ Print the version of Autoconf used to generate the `configure'
+ script, and exit.
+
+`--cache-file=FILE'
+ Enable the cache: use and save the results of the tests in FILE,
+ traditionally `config.cache'. FILE defaults to `/dev/null' to
+ disable caching.
+
+`--config-cache'
+`-C'
+ Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+ Do not print messages saying which checks are being made. To
+ suppress all normal output, redirect it to `/dev/null' (any error
+ messages will still be shown).
+
+`--srcdir=DIR'
+ Look for the package's source code in directory DIR. Usually
+ `configure' can determine that directory automatically.
+
+`--prefix=DIR'
+ Use DIR as the installation prefix. *note Installation Names::
+ for more details, including other options available for fine-tuning
+ the installation locations.
+
+`--no-create'
+`-n'
+ Run the configure checks, but stop before creating any output
+ files.
+
+`configure' also accepts some other, not widely useful, options. Run
+`configure --help' for more details.
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 00000000..ea5a667e
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,3 @@
+AM_CPPFLAGS = -I$(top_srcdir)/src/include
+SUBDIRS = src doc
+ACLOCAL_AMFLAGS = -I m4
diff --git a/NEWS b/NEWS
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/NEWS
diff --git a/README b/README
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/README
diff --git a/bootstrap b/bootstrap
new file mode 100755
index 00000000..4e7cc053
--- /dev/null
+++ b/bootstrap
@@ -0,0 +1,2 @@
+#!/bin/sh
+autoreconf -if
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 00000000..789df8e4
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,156 @@
+# -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.69])
+AC_INIT([taler-mint], [0.0.0], [taler-bug@gnunet.org])
+AC_CONFIG_SRCDIR([src/util/json.c])
+AC_CONFIG_HEADERS([taler_config.h])
+# support for non-recursive builds
+AM_INIT_AUTOMAKE([subdir-objects])
+
+# pretty build rules
+AM_SILENT_RULES([yes])
+
+AC_CONFIG_MACRO_DIR([m4])
+
+LT_INIT
+
+# Checks for programs.
+AC_PROG_CC
+
+CFLAGS="-Wall $CFLAGS"
+
+# Checks for header files.
+AC_CHECK_HEADERS([stdint.h stdlib.h string.h unistd.h])
+
+# Check for GNUnet's libgnunetutil.
+libgnunetutil=0
+AC_MSG_CHECKING([for libgnunetutil])
+AC_ARG_WITH(gnunet,
+ [AS_HELP_STRING([--with-gnunet=PFX], [base of GNUnet installation])],
+ [AC_MSG_RESULT([given as $with_gnunet])],
+ [AC_MSG_RESULT(not given)
+ with_gnunet=yes])
+AS_CASE([$with_gnunet],
+ [yes], [],
+ [no], [AC_MSG_ERROR([--with-gnunet is required])],
+ [LDFLAGS="-L$with_gnunet/lib $LDFLAGS"
+ CPPFLAGS="-I$with_gnunet/include $CPPFLAGS"])
+AC_CHECK_HEADERS([gnunet/platform.h gnunet/gnunet_util_lib.h],
+ [AC_CHECK_LIB([gnunetutil], [GNUNET_SCHEDULER_run], libgnunetutil=1)],
+ [], [#ifdef HAVE_GNUNET_PLATFORM_H
+ #include <gnunet/platform.h>
+ #endif])
+AS_IF([test $libgnunetutil != 1],
+ [AC_MSG_ERROR([[
+***
+*** You need libgnunetutil to build this program.
+*** This library is part of GNUnet, available at
+*** https://gnunet.org
+*** ]])])
+
+
+# check for libmicrohttpd
+microhttpd=0
+AC_MSG_CHECKING([for microhttpd])
+AC_ARG_WITH([microhttpd],
+ [AS_HELP_STRING([--with-microhttpd=PFX], [base of microhttpd installation])],
+ [AC_MSG_RESULT([given as $with_microhttpd])],
+ [AC_MSG_RESULT([not given])
+ with_microhttpd=yes])
+AS_CASE([$with_microhttpd],
+ [yes], [],
+ [no], [AC_MSG_ERROR([--with-microhttpd is required])],
+ [LDFLAGS="-L$with_microhttpd/lib $LDFLAGS"
+ CPPFLAGS="-I$with_microhttpd/include $CPPFLAGS"])
+AC_CHECK_LIB(microhttpd,MHD_start_daemon,
+ [AC_CHECK_HEADER([microhttpd.h],[microhttpd=1])])
+AS_IF([test $microhttpd = 0],
+ [AC_MSG_ERROR([[
+***
+*** You need libmicrohttpd to build this program.
+*** ]])])
+
+
+# check for libpq (postgresql)
+AX_LIB_POSTGRESQL([9.3])
+AS_IF([test ! "$found_postgresql" = "yes"],
+ [AC_MSG_ERROR([[
+***
+*** You need postgresql / libpq to build this program.
+*** ]])])
+
+
+# check for libjansson (Jansson JSON library)
+jansson=0
+AC_MSG_CHECKING([for jansson])
+AC_ARG_WITH([jansson],
+ [AS_HELP_STRING([--with-jansson=PFX], [base of jansson installation])],
+ [AC_MSG_RESULT([given as $with_jansson])],
+ [AC_MSG_RESULT([not given])
+ with_jansson=yes])
+AS_CASE([$with_jansson],
+ [yes], [],
+ [no], [AC_MSG_ERROR([--with-jansson is required])],
+ [LDFLAGS="-L$with_jansson/lib $LDFLAGS"
+ CPPFLAGS="-I$with_jansson/include $CPPFLAGS"])
+AC_CHECK_LIB(jansson,json_pack,
+ [AC_CHECK_HEADER([jansson.h],[jansson=1])])
+AS_IF([test $jansson = 0],
+ [AC_MSG_ERROR([[
+***
+*** You need libjansson to build this program.
+*** ]])])
+
+# check for libgnurl
+LIBGNURL_CHECK_CONFIG([], [7.34.0], [gnurl=1], [gnurl=0])
+if test "$gnurl" = 1
+then
+ AM_CONDITIONAL(HAVE_LIBGNURL, true)
+ AC_DEFINE([HAVE_LIBGNURL],[1],[Have libgnurl])
+else
+ AM_CONDITIONAL(HAVE_LIBGNURL, false)
+fi
+AS_IF([test $gnurl = 0],
+ [AC_MSG_ERROR([[
+***
+*** You need libgnurl to build this program.
+*** ]])])
+
+# Require minimum libgcrypt version
+need_libgcrypt_version=1.6.1
+AC_DEFINE_UNQUOTED([NEED_LIBGCRYPT_VERSION], ["$need_libgcrypt_version"],
+ [minimum version of libgcrypt required])
+AM_PATH_LIBGCRYPT([$need_libgcrypt_version])
+
+# logging
+extra_logging=0
+AC_ARG_ENABLE([logging],
+ AS_HELP_STRING([--enable-logging@<:@=value@:>@],[Enable logging calls. Possible values: yes,no,verbose ('yes' is the default)]),
+ [AS_IF([test "x$enableval" = "xyes"], [],
+ [test "x$enableval" = "xno"], [AC_DEFINE([GNUNET_CULL_LOGGING],[],[Define to cull all logging calls])],
+ [test "x$enableval" = "xverbose"], [extra_logging=1]
+ [test "x$enableval" = "xveryverbose"], [extra_logging=2])
+ ], [])
+AC_DEFINE_UNQUOTED([GNUNET_EXTRA_LOGGING],[$extra_logging],[1 if extra logging is enabled, 2 for very verbose extra logging, 0 otherwise])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_TYPE_PID_T
+AC_TYPE_SIZE_T
+AC_TYPE_UINT16_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_TYPE_INTMAX_T
+AC_TYPE_UINTMAX_T
+
+# Checks for library functions.
+AC_CHECK_FUNCS([strdup])
+
+AC_CONFIG_FILES([Makefile
+ doc/Makefile
+ src/Makefile
+ src/include/Makefile
+ src/util/Makefile
+ src/mint/Makefile
+ ])
+AC_OUTPUT
diff --git a/contrib/mint-template/README b/contrib/mint-template/README
new file mode 100644
index 00000000..fce5e018
--- /dev/null
+++ b/contrib/mint-template/README
@@ -0,0 +1 @@
+This directory is a template for the mint directory.
diff --git a/contrib/mint-template/config/mint-common.conf b/contrib/mint-template/config/mint-common.conf
new file mode 100644
index 00000000..becf4243
--- /dev/null
+++ b/contrib/mint-template/config/mint-common.conf
@@ -0,0 +1,6 @@
+[mint]
+db = postgres:///taler
+port = 4241
+master_pub = ...
+refresh_security_parameter = 3
+
diff --git a/contrib/mint-template/config/mint-keyup.conf b/contrib/mint-template/config/mint-keyup.conf
new file mode 100644
index 00000000..1542d1a6
--- /dev/null
+++ b/contrib/mint-template/config/mint-keyup.conf
@@ -0,0 +1,79 @@
+[mint_keys]
+
+# how long is one signkey valid?
+signkey_duration = 4 weeks
+
+# how long do we generate denomination and signing keys
+# ahead of time?
+lookahead_sign = 32 weeks 1 day
+
+# how long do we provide to clients denomination and signing keys
+# ahead of time?
+lookahead_provide = 4 weeks 1 day
+
+# what coin types do we have available?
+coin_types = default_eur_ct_10 default_eur_5 default_eur_10 default_eur_1000
+
+
+
+[mint_denom_duration_overlap]
+default_eur_ct_10 = 5 minutes
+default_eur_5 = 5 minutes
+default_eur_10 = 5 minutes
+default_eur_1000 = 5 minutes
+
+
+
+[mint_denom_value]
+default_eur_ct_10 = EUR:0.10
+default_eur_5 = EUR:5
+default_eur_10 = EUR:10
+default_eur_1000 = EUR:1000
+
+
+
+[mint_denom_duration_withdraw]
+default_eur_ct_10 = 7 days
+default_eur_5 = 7 days
+default_eur_10 = 7 days
+default_eur_1000 = 1 day
+
+
+
+[mint_denom_duration_spend]
+default_eur_ct_10 = 30 days
+default_eur_5 = 30 days
+default_eur_10 = 30 days
+default_eur_1000 = 30 day
+
+
+
+[mint_denom_fee_withdraw]
+default_eur_ct_10 = EUR:0.01
+default_eur_5 = EUR:0.01
+default_eur_10 = EUR:0.01
+default_eur_1000 = EUR:0.01
+
+
+[mint_denom_fee_deposit]
+default_eur_ct_10 = EUR:0.01
+default_eur_5 = EUR:0.01
+default_eur_10 = EUR:0.01
+default_eur_1000 = EUR:0.01
+
+
+
+[mint_denom_fee_refresh]
+default_eur_ct_10 = EUR:0.01
+default_eur_5 = EUR:0.01
+default_eur_10 = EUR:0.01
+default_eur_1000 = EUR:0.01
+
+
+
+[mint_denom_kappa]
+default_eur_ct_10 = 3
+default_eur_5 = 3
+default_eur_10 = 3
+default_eur_1000 = 5
+
diff --git a/doc/.gitignore b/doc/.gitignore
new file mode 100644
index 00000000..8fd4c091
--- /dev/null
+++ b/doc/.gitignore
@@ -0,0 +1,12 @@
+*.aux
+*.dvi
+*.log
+*.pdf
+*.out
+*.snm
+*.toc
+*.vrb
+*.nav
+*/auto
+api-sphinx/_build
+api-sphinx/*.html
diff --git a/doc/Makefile.am b/doc/Makefile.am
new file mode 100644
index 00000000..4af5c665
--- /dev/null
+++ b/doc/Makefile.am
@@ -0,0 +1,5 @@
+EXTRA_DIST = \
+ paper/taler.tex
+ paper/ref.bib \
+ paper/Makefile
+
diff --git a/doc/logos/ai/logotalerv2.ai b/doc/logos/ai/logotalerv2.ai
new file mode 100644
index 00000000..d474079d
--- /dev/null
+++ b/doc/logos/ai/logotalerv2.ai
@@ -0,0 +1,3474 @@
+%PDF-1.5 %
+1 0 obj <</Metadata 2 0 R/OCProperties<</D<</ON[5 0 R 248 0 R 489 0 R 730 0 R]/Order 731 0 R/RBGroups[]>>/OCGs[5 0 R 248 0 R 489 0 R 730 0 R]>>/Pages 3 0 R/Type/Catalog>> endobj 2 0 obj <</Length 50398/Subtype/XML/Type/Metadata>>stream
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+ <rdf:Description rdf:about=""
+ xmlns:dc="http://purl.org/dc/elements/1.1/">
+ <dc:format>application/pdf</dc:format>
+ <dc:title>
+ <rdf:Alt>
+ <rdf:li xml:lang="x-default">logotalerv2</rdf:li>
+ </rdf:Alt>
+ </dc:title>
+ </rdf:Description>
+ <rdf:Description rdf:about=""
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+ <xmpGImg:format>JPEG</xmpGImg:format>
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+trailer <</Size 971/Root 1 0 R/Info 970 0 R/ID[<07511D2C75694DC89622C9F4B35B7624><8DE5252BE861447E9DAABAECF80D68A1>]>> startxref 540533 %%EOF \ No newline at end of file
diff --git a/doc/logos/eps/icon_taler.eps b/doc/logos/eps/icon_taler.eps
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diff --git a/doc/logos/fonts/smoth_bight/End User Licence Agreement.txt b/doc/logos/fonts/smoth_bight/End User Licence Agreement.txt
new file mode 100755
index 00000000..04209197
--- /dev/null
+++ b/doc/logos/fonts/smoth_bight/End User Licence Agreement.txt
@@ -0,0 +1,133 @@
+End User License Agreement and Software Inclusion Agreement
+
+
+"Purchaser" and "User" may be used interchangeably in this agreement.
+
+
+The official release page is at kustren.deviantart.com/
+
+or
+
+
+
+ Copyright 2013 Kustren
+ Trademark 2013 Kustren licence
+ Commercial distribution, rendering and printing of the font and derived work is prohibited.
+
+
+
+
+
+Usage
+
+Smoth-Bight is freeware Font is free to use for personal and commercial purposes. No payment is necessary, and there is no limit to the amount of prints, pages, or other medium to be produced using them. However, you cannot offer the font for commercial sale, or offer for direct download. The inclusion othe font name and/or site URL in the credits or documentation when it is used is appreciated, but this is not mandatory.
+My font is for personal and commercial use, can be used for any type of work, while nature, neither will be able to be modified in any kind of way.
+This license is multipurpose, my font can be used on multiple computers at once.
+
+
+
+
+
+Payment
+
+Payment is not required for the use of kustren's freeware Font.
+
+
+
+Support
+
+If you experience problems with any Kustren's Freeware font (such as spacing issues or missing characters), please verify that you have the correct and current version of the fonts. In the case of Freeware font, downloading the font directly from the http://kustren.deviantart.com/ site will ensure that the font files have not been altered.
+
+
+
+
+Copyright (c) 2014 by Kustren. All rights reserved.
+
+
+
+
+
+
+
+
+
+
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diff --git a/doc/logos/fonts/smoth_bight/Licencia de la fuente - Version en Espa§ol.txt b/doc/logos/fonts/smoth_bight/Licencia de la fuente - Version en Espa§ol.txt
new file mode 100755
index 00000000..39833a36
--- /dev/null
+++ b/doc/logos/fonts/smoth_bight/Licencia de la fuente - Version en Espa§ol.txt
@@ -0,0 +1,77 @@
+Contrato de licencia de usuario final e Inclusin del acuerdo de Software
+
+"Comprador " y "Usuario " se pueden utilizar indistintamente en el presente acuerdo .
+
+
+La pgina oficial de lanzamiento de la fuente es:
+http://kustren.deviantart.com/
+
+
+
+ Derechos de autor 2013 Kustren
+ Marcas 2013 licencia Kustren
+ Se prohbe la distribucin comercial, la representacin y la impresin de la fuente y el trabajo derivado .
+
+
+
+
+
+Uso
+
+La fuente de Kustren llamada Smoth-Bight es freware en su mayoria, de uso libre, pero solo para fines personales y/o comerciales, no hay limite en la cantidad de copias realizadas de la mis ma fuente en los pcs que usted utilice.
+Sin embargo no pueden ofrecer esta tipografia ni como suyas y/o comercializarla, tampoco estara permitida la descarga directa en otras paginas web, a menos que sea con consentimiento de su creador Kustren.
+Si usted usa mi fuente deme creditos por ello y/o coloque la pagina web mia, esto es de agradecer.
+
+licencia del derecho de uso
+
+Esta fuente es para uso personal y/o comercial, puede ser usadas para cualquier tipo de trabajo, pero no podra ser modificadas de ningun tipo de manera.
+Recuerden que si ustedes compran alguna tipografia no se convierten en propietariuo de la fuente, solo obtienen la licencia de uso, es decir la misma que estan leyendo.
+Esta licencia es de multiuso, mi fuente pueden ser usadas en multiples computadores a la vez.
+
+
+
+
+
+pago
+
+El pago no es necesaria para el uso de esta fuente de software gratuito creada por kustren.
+
+
+
+apoyo
+
+Si tienen problema con la fuente (como problemas de espaciado o caracteres que faltan ) , por favor, compruebe que tiene la versin correcta y actualizada de la fuente. En el caso de fuentes de dominio pblico , la descarga de la fuente directamente desde el sitio http://kustren.deviantart.com/ se asegurar de que los archivos de fuentes no han sido alterados.
+
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+
diff --git a/doc/logos/fonts/smoth_bight/Smoth-Bight - Por Kustren.otf b/doc/logos/fonts/smoth_bight/Smoth-Bight - Por Kustren.otf
new file mode 100755
index 00000000..33fd9793
--- /dev/null
+++ b/doc/logos/fonts/smoth_bight/Smoth-Bight - Por Kustren.otf
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diff --git a/doc/logos/fonts/smoth_bight/Smoth-Bight Italic - Por Kustren.otf b/doc/logos/fonts/smoth_bight/Smoth-Bight Italic - Por Kustren.otf
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diff --git a/doc/logos/ico/favicon1616.ico b/doc/logos/ico/favicon1616.ico
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index 00000000..141b93d3
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diff --git a/doc/logos/ico/favicon4848.ico b/doc/logos/ico/favicon4848.ico
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index 00000000..3c04b126
--- /dev/null
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diff --git a/doc/logos/png/icon_taler.png b/doc/logos/png/icon_taler.png
new file mode 100644
index 00000000..b1dd9a58
--- /dev/null
+++ b/doc/logos/png/icon_taler.png
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diff --git a/doc/logos/png/logo_taler.png b/doc/logos/png/logo_taler.png
new file mode 100644
index 00000000..bdffc3c9
--- /dev/null
+++ b/doc/logos/png/logo_taler.png
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diff --git a/doc/paper/.latexmkrc b/doc/paper/.latexmkrc
new file mode 100644
index 00000000..16bc358f
--- /dev/null
+++ b/doc/paper/.latexmkrc
@@ -0,0 +1,15 @@
+add_cus_dep('glo', 'gls', 0, 'run_makeglossaries');
+add_cus_dep('acn', 'acr', 0, 'run_makeglossaries');
+
+sub run_makeglossaries {
+ if ( $silent ) {
+ system "makeglossaries -q '$_[0]'";
+ }
+ else {
+ system "makeglossaries '$_[0]'";
+ };
+}
+
+push @generated_exts, 'glo', 'gls', 'glg';
+push @generated_exts, 'acn', 'acr', 'alg';
+$clean_ext .= ' %R.ist %R.xdy';
diff --git a/doc/paper/taler.bib b/doc/paper/taler.bib
new file mode 100644
index 00000000..ce5b1cb1
--- /dev/null
+++ b/doc/paper/taler.bib
@@ -0,0 +1,94 @@
+@article{nakamoto2008bitcoin,
+ title={Bitcoin: A peer-to-peer electronic cash system},
+ author={Nakamoto, Satoshi},
+ year={2008}
+}
+
+@Article{blum1981,
+ author = {Manuel Blum},
+ title = {Coin Flipping by Telephone},
+ journal = {CRYPTO},
+ year = {1981},
+ pages = {11-15},
+}
+
+@inproceedings{chaum1990untraceable,
+ title={Untraceable electronic cash},
+ author={Chaum, David and Fiat, Amos and Naor, Moni},
+ booktitle={Proceedings on Advances in cryptology},
+ pages={319--327},
+ year={1990},
+ organization={Springer-Verlag New York, Inc.}
+}
+
+@inproceedings{chaum1983blind,
+ title={Blind signatures for untraceable payments},
+ author={Chaum, David},
+ booktitle={Advances in cryptology},
+ pages={199--203},
+ year={1983},
+ organization={Springer}
+}
+
+@inproceedings{rivest2004peppercoin,
+ title={Peppercoin micropayments},
+ author={Rivest, Ronald L},
+ booktitle={Financial Cryptography},
+ pages={2--8},
+ year={2004},
+ organization={Springer}
+}
+
+@inproceedings{miers2013zerocoin,
+ title={Zerocoin: Anonymous distributed e-cash from bitcoin},
+ author={Miers, Ian and Garman, Christina and Green, Matthew and Rubin, Aviel D},
+ booktitle={Security and Privacy (SP), 2013 IEEE Symposium on},
+ pages={397--411},
+ year={2013},
+ organization={IEEE}
+}
+
+@inproceedings{selby2004analyzing,
+ title={Analyzing the Success and Failure of Recent e-Payment Schemes},
+ author={Selby, Jack R},
+ booktitle={Financial Cryptography},
+ pages={1--1},
+ year={2004},
+ organization={Springer}
+}
+
+@misc{brands1993efficient,
+ title={An efficient off-line electronic cash system based on the representation problem},
+ author={Brands, Stefan A},
+ year={1993},
+ publisher={Centrum voor Wiskunde en Informatica}
+}
+
+@article{dent2008extensions,
+ title={Extensions to Chaum's Blind Signature Scheme and OpenCoin Requirements},
+ author={Dent, AW and Paterson, KG and Wild, PR},
+ year={2008}
+}
+
+@article{dent2008preliminary,
+ title={Preliminary Report on Chaum's Online E-Cash Architecture},
+ author={Dent, AW and Paterson, KG and Wild, PR},
+ journal={Royal Holloway, University of London},
+ year={2008}
+}
+
+
+
+@inproceedings{tor-design,
+ title = {Tor: The Second-Generation Onion Router},
+ author = {Roger Dingledine and Nick Mathewson and Paul Syverson},
+ booktitle = {Proceedings of the 13th USENIX Security Symposium},
+ year = {2004},
+ month = {August},
+ www_important = {1},
+ www_tags = {selected},
+ www_html_url = {https://www.torproject.org/svn/trunk/doc/design-paper/tor-design.html},
+ www_pdf_url = {https://www.torproject.org/svn/trunk/doc/design-paper/tor-design.pdf},
+ www_section = {Anonymous communication},
+}
+
diff --git a/doc/paper/taler.tex b/doc/paper/taler.tex
new file mode 100644
index 00000000..7a71d763
--- /dev/null
+++ b/doc/paper/taler.tex
@@ -0,0 +1,995 @@
+\documentclass{llncs}
+%\usepackage[margin=1in,a4paper]{geometry}
+\usepackage[T1]{fontenc}
+\usepackage{palatino}
+\usepackage{xspace}
+\usepackage{microtype}
+\usepackage{tikz}
+\usepackage{amsmath,amssymb}
+\usepackage{enumitem}
+\usetikzlibrary{shapes,arrows}
+\usetikzlibrary{positioning}
+\usetikzlibrary{calc}
+
+
+
+% Terminology:
+% - SEPA-transfer -- avoid 'SEPA transaction' as we use
+% 'transaction' already when we talk about taxable
+% transfers of Taler coins and database 'transactions'.
+% - wallet = coins at customer
+% - reserve = currency entrusted to mint waiting for withdrawl
+% - deposit = SEPA to mint
+% - withdrawl = mint to customer
+% - spending = customer to merchant
+% - redeeming = merchant to mint (and then mint SEPA to merchant)
+% - refreshing = customer-mint-customer
+% - dirty coin = coin with exposed public key
+% - fresh coin = coin that was refreshed or is new
+% - coin signing key = mint's online key used to (blindly) sign coin
+% - message signing key = mint's online key to sign mint messages
+% - mint master key = mint's key used to sign other mint keys
+% - owner = entity that knows coin private key
+% - transaction = coin ownership transfer that should be taxed
+% - sharing = coin copying that should not be taxed
+
+
+\title{Taler: Taxable Anonymous Libre Electronic Reserves}
+
+\begin{document}
+\mainmatter
+
+%\author{Florian Dold \and Sree Harsha Totakura \and Benedikt M\"uller \and Christian Grothoff}
+%\institute{The GNUnet Project}
+
+
+\maketitle
+
+\begin{abstract}
+This paper introduces Taler, a Chaum-style digital currency using
+blind signatures that enables anonymous payments while ensuring that
+entities that receive payments are auditable and thus taxable. Taler
+differs from Chaum's original proposal in that customers can never defraud anyone,
+merchants can only fail to deliver the merchandise to the customer,
+and mints can be fully audited. Consequently, enforcement of honest
+behavior is better and more timely than with Chaum, and is at least as
+strict as with legacy credit card payment systems that do not provide
+for privacy. Furthermore, Taler allows fractional and incremental
+payments, and even in this case is still able to guarantee
+unlinkability of transactions via a new coin refreshing protocol.
+Finally, Taler also supports microdonations using probabilistic
+transactions. We argue that Taler provides a secure digital currency
+for modern liberal societies as it is a flexible, libre and efficient
+protocol and adequately balances the state's need for monetary control
+with the citizen's needs for private economic activity.
+\end{abstract}
+
+\section{Introduction}
+
+The design of payment systems shapes economies and societies. Strong,
+developed nation states are evolving towards fully transparent payment
+systems, such as the MasterCard and VisaCard credit card schemes and
+computerized bank transactions such as SWIFT. Such systems enable
+mass surveillance and thus extensive government control over the
+economy, from taxation to intrusion into private lives. Bribery and
+corruption are limited to elites that can afford to escape the
+dragnet. The other extreme are economies of developing, weak nation
+states where economic activity is based largely on coins, paper money
+or even barter. Here, the state is often unable to effectively
+monitor or tax economic activity, and this limits the ability of the
+state to shape the society. As bribery is virtually impossible to
+detect, it is widespread and not limited to social elites.
+ZeroCoin~\cite{miers2013zerocoin} is an example for translating such
+an economy into the digital realm.
+
+Taler is supposed to offer a middleground between an authoritarian
+state in total control of the population and weak states with almost
+anarchistic economies. Specifically, we believe that a liberal
+democracy needs a payment system with the following properties:
+
+\begin{description}
+ \item[Customer Anonymity] It must be impossible for mints, merchants
+ and even a global active adversary, to trace the spending behavior
+ of a customer.
+ \item[Unlinkability] Merchants must not be able to tell if two
+ transactions were performed by the same customer. It must be
+ infeasible to link a set of transactions to the same (anonymous)
+ customer. %, even when taking aborted transactions into account.
+ \item[Taxability] In many current legal systems, it is the
+ responsibility of the merchant to deduct (sales) taxes from
+ purchases made by customers, or to pay (income) taxes for payments
+ received for work.
+ %Taxation is neccessary for the state to
+ %provide legitimate social functions, such as education. Thus, a payment
+ %system must facilitate sales, income and transaction taxes.
+ This specifically means that it must be able to audit merchants (or
+ generally anybody receiving money), and thus the receiver of
+ electronic cash must be easily identifiable.
+ %non-anonymous, as this would enable tax fraud.
+ \item[Verifiability] The payment system should try to minimize the
+ trust necessary between the participants. In particular, digital
+ signatures should be used extensively in order to be able to
+ resolve disputes between the involved parties. Nevertheless,
+ customers must never be able to defraud anyone, and merchants must
+ at best be able to defraud their customers by not delivering the
+ on the agreed contract. Neither merchants nor customers must ever
+ be able to commit fraud against the mint. Both customers and
+ merchants must receive cryptographic proofs of bad behavior in
+ case of protocol violations by the mint. Thus, only the mint will
+ have to be tightly audited and regulated. The design must make it
+ easy to audit the finances of the mint.
+ \item[Ease of Deployment] %The system should be easy to deploy for
+ % real-world applications. In order to lower the entry barrier and
+ % acceptance of the system, a gateway to the existing financial
+ % system should be provided, i.e. by integrating internet-banking
+ % protocols such as HBCI/FinTAN.
+ The digital currency should be
+ tied 1:1 to existing currencies (such as EUR or USD) to avoid
+ exposing users to unnecessary risks from currency fluctuations.
+ Moreover, the system must have a free software reference
+ implementation and an open protocol standard.
+% The protocol should
+% be able to run easily over HTTP(S).
+ \item[Low resource consumption] In order to minimize the operating
+ costs and environmental impact of the payment system, it must
+ avoid the reliance on expensive and ``wasteful'' computations
+ such as proof-of-work.
+ \item[Large Payments and Microdonations] The payment system needs to
+ handle large payments in a reliable manner. Furthermore, for
+ microdonations the system should allow sacrificing reliability to
+ achieve economic viability.
+\end{description}
+
+Taler builds on ideas from Chaum~\cite{chaum1983blind}, who proposed a
+digital currency system that would provide (some) customer anonymity
+while disclosing the identity of the merchants. Chaum's digital cash
+system had some limitations and ultimately failed to be widely
+adopted. In our assessment, key reasons include:
+
+\begin{itemize}
+ \item The use of patents to protect the technology; a payment system
+ must be libre --- free software --- to have a chance for widespread
+ adoption.
+ \item The use of off-line payments and thus deferred detection of
+ double-spending, which could require the mint to attempt to recover
+ funds from customers via the legal system. This creates a
+ significant business risk for the mint, as the system is not
+ self-enforcing from the perspective of the mint. In 1983 off-line
+ payments might have been a necessary feature. However, today
+ requiring network connectivity is feasible and avoids the business
+ risks associated with deferred fraud detection.
+ \item % In addition to the risk of legal disputes with fradulent
+ % merchants and customers,
+ Chaum's published design does not clearly
+ limit the financial damage a mint might suffer from the
+ disclosure of its private online signing key.
+% \item Chaum did not support fractional payments, and Brand's
+% extensions for fractional payments broke unlinkability and thus
+% limited anonymity. Chaum also did not support microdonations,
+% leaving an opportunity for expanding payments into additional areas
+% unexplored.
+% \item Chaum's system was implemented at a time where the US market
+% was still dominated by paper checks and the European market was
+% fragmented into dozens of currencies. Today, SEPA provides a
+% unified currency and currency transfer method for most of Europe,
+% significantly lowering the barrier to entry into this domain for
+% a larger market.
+\end{itemize}
+
+This paper describes Taler, a simple and practical payment with the
+above goals in mind. The basic idea is to use Chaum's model of
+customer, merchant and mint (Figure~\ref{fig:cmm}) where the customer
+withdraws digital currency from the mint with unlinkability provided
+via blind signatures. In contrast to Chaum, Taler uses online
+detection of double-spending, thus ensuring the merchant instantly
+that a transaction is valid. Instead of using cryptographic methods
+to enable fractional payments, the customer can simply include
+the fraction of a coin's value that is to be paid to the merchant in
+his message to the merchant.
+
+
+\begin{figure}[h]
+\centering
+\begin{tikzpicture}
+
+
+\tikzstyle{def} = [node distance= 7em and 10em, inner sep=1em, outer sep=.3em];
+\node (origin) at (0,0) {};
+\node (mint) [def,above=of origin,draw]{Mint};
+\node (customer) [def, draw, below left=of origin] {Customer};
+\node (merchant) [def, draw, below right=of origin] {Merchant};
+
+\tikzstyle{C} = [color=black, line width=1pt]
+\draw [<-, C] (customer) -- (mint) node [midway, above, sloped] (TextNode) {withdraw coins};
+\draw [<-, C] (mint) -- (merchant) node [midway, above, sloped] (TextNode) {deposit coins};
+\draw [<-, C] (merchant) -- (customer) node [midway, above, sloped] (TextNode) {spend coins};
+\end{tikzpicture}
+\caption{Taler's system model for the payment system is based on Chaum~\cite{chaum1983blind}.}
+\label{fig:cmm}
+\end{figure}
+
+Online fraud detection can create problems if the network fails during
+the initial steps of a transaction. For example, a law enforcement
+agency might try to entrap a customer by offering illicit goods and
+then aborting the transaction after learning the public key of the
+coin. If the customer were to then later spend that coin on a
+purchase with shipping, the law enforcement agency could link the two
+transactions and might be able to use the shipping to deanonymize the
+customer. Similarly, fractional payments also lead to the
+possibility of customers wanting to legitimately use the same coin
+twice. Taler addresses this problem by allowing customers to {\em
+ refresh} coins. Refreshing means that a customer is able to
+exchange one coin for a fresh coin, with the old and the new coin
+being unlinkable (except for the customer himself). Taler ensures
+that the {\em entity} of the user owning the new coin is the same as the
+entity of the user owning the old coin, thus making sure that the
+refreshing protocol cannot be abused for money laundering or other
+illicit transactions.
+
+
+\section{Related Work}
+
+\subsection{Blockchain-based currencies}
+
+In recent years, a class of decentralized electronic payment systems,
+based on collectively recorded and verified append-only public
+ledgers, have gained immense popularity. The most well-known protocol
+in this class is Bitcoin~\cite{nakamoto2008bitcoin}. An initial
+concern with Bitcoin was the lack of anonymity, as all Bitcoin
+transactions are recorded for eternity, which can enable
+identification of users. In theory, this concern has been addressed
+with the Zerocoin extension to the protocol~\cite{miers2013zerocoin}.
+
+While these protocols dispense with the need for a central, trusted
+authority and provide anonymity, we argue there are some major,
+irredeemable problems inherent in these systems:
+
+\begin{itemize}
+ \item Bitcoins are not (easily) taxable. The legality and legitimacy of
+ this aspect is questionable. The Zerocoin extension would only make
+ this worse.
+ \item Bitcoins can not be bound to any fiat currency, and are subject to
+ significant value fluctuations. While such fluctuations may be
+ acceptable for high-risk investments, they make Bitcoin unsuitable as
+ a medium of exchange.
+ \item The computational puzzles solved by Bitcoin nodes with the purpose
+ of securing the block chain
+ consume a considerable amount of computational resources and thus
+ energy. Thus, Bitcoin does not represent an environmentally responsible
+ design.
+ \item Anyone can easily start an alternative Bitcoin transaction chain
+ (a so-called AltCoin) and, if successful, reap the benefits of the low
+ cost to initially create coins via computation. As a result, dozens of
+ AltCoins have been created, often without any significant changes to the
+ technology. A large number of AltCoins creates additional overheads for
+ currency exchange and exascerbates the problems with currency fluctuations.
+\end{itemize}
+
+\subsection{Chaum-style electronic cash}
+
+Chaum's original digital cash system~\cite{chaum1983blind} was
+extended by Brands~\cite{brands1993efficient} with the ability to
+perform fractional payments; however, the transactions performed with
+the same coin then become linkable.
+%
+%Some argue that the focus on technically perfect but overwhelmingly
+%complex protocols, as well as the the lack of usable, practical
+%solutions lead to an abandonment of these ideas by
+%practitioners~\cite{selby2004analyzing}.
+%
+To our knowledge, the only publicly available effort to implement
+Chaum's idea is
+Opencoin~\cite{dent2008extensions}. However,
+Opencoin seems to be neither actively developed nor used, and it is
+not clear to what degree the implementation is even complete. Only a
+partial description of the Opencoin protocol is available to date.
+
+\subsection{Peppercoin}
+
+Peppercoin~\cite{rivest2004peppercoin} is a microdonation protocol.
+The main idea of the protocol is to reduce transaction costs by
+minimizing the number of transactions that are processed directly by
+the mint. Instead of always paying, the customer ``gambles'' with the
+merchant for each microdonation. Only if the merchant wins, the
+microdonation is upgraded to a macropayment to be deposited at the
+mint. Peppercoin does not provide customer-anonymity. The proposed
+statistical method for mints detecting fraudulent cooperation between
+customers and merchants at the expense of the mint not only creates
+legal risks for the mint (who has to make a statistical argument), but
+also would require the mint to learn about microdonations where the
+merchant did not get upgraded to a macropayment. Thus, it is unclear
+how much Peppercoin would actually do to reduce the computational
+burden on the mint.
+
+
+\section{Design}
+
+The payment system we propose is built on the blind signature
+primitive proposed by Chaum, but extended with additional
+constructions to provide unlinkability, online fraud detection and
+taxability.
+
+As with Chaum, the Taler system comprises three principal types of
+actors: The \emph{customer} is interested in receiving goods or
+services from the \emph{merchant} in exchange for payment. When
+making a transaction, both the customer and the merchant must agree on
+the same \emph{mint}, which serves as an intermediary for the
+financial transaction between the two. The mint is responsible for
+allowing the customer to obtain the anonymous digital currency and for
+enabling the merchant to convert the anonymous digital currency back
+to some traditional currency.
+
+\subsection{Security model}
+
+Taler's security model assumes that cryptographic primitives are
+secure and that each participant is under full control of his system.
+The contact information of the mint is known to both customer and
+merchant from the start. Furthermore, the merchant is known to the
+customer and we assume that an anonymous, reliable bi-directional
+communication channel can be established by the customer to both the
+mint and the merchant.
+
+The mint is trusted to hold funds of its customers and to forward them
+when receiving the respective deposit instructions from the merchants.
+Customer and merchant can have some assurances about the mint's
+liquidity and operation, as the mint has proven reserves, is subject
+to the law, and can have its business is regularly audited (for
+example, by the government or a trusted third party auditor).
+Audits of the mint's accounts must reveal any possible fraud.
+%
+The merchant is trusted to deliver the service or goods to the
+customer upon receiving payment. The customer can seek legal relief
+to achieve this, as he must get cryptographic proofs of the contract
+and that he paid his obligations.
+%
+Neither the merchant nor the customer may have any ability to {\em
+ effectively} defraud the mint or the state collecting taxes. Here,
+``effectively'' means that the expected return for fraud is negative.
+%
+Note that customers do not need to be trusted in any way, and that in
+particular it is never necessary for anyone to try to recover funds
+from customers using legal means.
+
+
+\subsection{Taxability and Entities}
+
+Electronic coins are trivially copied between machines. Thus, we must
+clarify what kinds of operations can even be expected to be taxed.
+After all, without instrusive measures to take away control of the
+computing platform from its users, copying an electronic wallet from
+one computer to another can hardly be prevented by a payment system.
+Furthermore, it would also hardly be appropriate to tax the moving of
+funds between two computers owned by the same individual. We thus
+need to clarify which kinds of transfers we expect to tax.
+
+Taler is supposed to ensure that the state can tax {\em transactions}.
+We define a transaction as the transfer of funds between {\em mutually
+ distrustful} entities. Two entities are assumed to be mutually
+distrustful if they are unwilling to share control over assets. If a
+private key is shared between two entities, then both entities have
+equal access to the credentials represented by the private key. In a
+payment system this means that either entity could spent the
+associated funds. Assuming the payment system has effective
+double-spending detection, this means that either entity has to
+constantly fear that the funds might no longer be available to it.
+Thus, ``transfering'' funds by sharing a private key implies that
+receiving party must trust the sender. In Taler, making funds
+available by sharing a private key and thus sharing control is {\bf
+ not} considered a {\em transaction} and thus {\bf not} recorded for
+taxation.
+
+A {\em transaction} is a transfer where it is assured that one entity
+gains control over funds while at the same time another entity looses
+control over those funds. Taler ensures taxability only when some
+entity acquires exclusive control over digital coins. For
+transactions, the state can obtain information from the mint (or the
+bank) that identifies the entity that received the digital coins as
+well as the exact value of those coins. Taler also allows the mint
+(and thus the state) to learn the value of digital coins withdrawn by
+a customer --- but not how, where or when they were spent. Finally,
+to enable audits, the current balance and profits of the mint are also
+easily determined.
+
+\subsection{Anonymity}
+
+An anonymous communication channel (e.g. via Tor~\cite{tor-design}) is
+used for all communication between the customer and the merchant.
+Thus, the customer can remain anonymous; however, the system does reveal
+that the customer is one of the patrons of the mint. Naturally, the
+customer-merchant operation might leak other information about the
+customer, such as a shipping address. Such purchase-specific
+information leakage is outside of the scope of this work.
+
+The customer may use an anonymous communication channel for the
+communication with the mint to avoid leaking IP address information;
+however, the mint will anyway be able to determine the customer's
+identity from the (SEPA) transfer that the customer initiates to
+obtain anonymous digital cash. The scheme is anonymous
+because the mint will be unable to link the known identity of the
+customer that withdrew anonymous digital currency to the {\em
+ purchase} performed later at the merchant.
+% All the mint will be
+%able to confirm is that the customer is {\em one} of its patrons who
+%previously obtained the anonymous digital currency --- and of course
+%that the coin was not spent before.
+
+While the customer thus has anonymity for his purchase, the mint will
+always learn the merchant's identity (which is necessary for
+taxation), and thus the merchant has no reason to anonymize his
+communication with the mint.
+% Technically, the merchant could still
+%use an anonymous communication channel to communicate with the mint.
+%However, in order to receive the traditional currency the mint will
+%require (SEPA) account details for the deposit.
+
+%As both the initial transaction between the customer and the mint as
+%well as the transactions between the merchant and the mint do not have
+%to be done anonymously, there might be a formal business contract
+%between the customer and the mint and the merchant and the mint. Such
+%a contract may provide customers and merchants some assurance that
+%they will actually receive the traditional currency from the mint
+%given cryptographic proof about the validity of the transaction(s).
+%However, given the business overheads for establishing such contracts
+%and the natural goal for the mint to establish a reputation and to
+%minimize cost, it is more likely that the mint will advertise its
+%external auditors and proven reserves and thereby try to convince
+%customers and merchants to trust it without a formal contract.
+
+
+\subsection{Coins}
+
+A \emph{coin} is a digital token which derives its financial value
+from a signature on the coin's identifier by a mint. The mint is
+expected to have multiple {\em coin signing key} pairs available for
+signing, each representing a different coin denomination.
+
+The coin signing keys have an expiration date (typically measured in
+years), and coins signed with a coin signing key must be spent (or
+exchanged for new coins) before that expiration date. This allows the
+mint to limit the amount of state it needs to keep to detect
+double spending attempts. Furthermore, the mint is expected to use each coin
+signing key only for a limited number of coins, for example by
+limiting its use to sign coins to a week or a month. That way, if the
+private coin signing key were to be compromised, the mint can detect
+this once more coins are redeemed than the total that was signed into
+existence using the respective coin signing key. In this case, the
+mint can allow the original set of customers to exchange the coins
+that were signed with the compromised private key, while refusing
+further transactions from merchants if they involve those coins. As a
+result, the financial damage of loosing a private signing key can be
+limited to at most twice the amount originally signed with that key.
+To ensure that the mint does not enable deanonymization of users by
+signing each coin with a fresh coin signing key, the mint must
+publicly announce the coin signing keys in advance. Those
+announcements are expected to be signed with an off-line long-term
+private {\em master signing key} of the mint and possibly the auditor.
+
+Before a customer can withdraw a coin from the mint, he has to pay the
+mint the value of the coin, as well as processing fees. This is done
+using other means of payments, such as SEPA transfers~\cite{sepa}.
+The subject line of the transfer must contains {\em withdrawal
+ authorization key}, a public key for digital signatures generated by
+the customer. When the mint receives a transfer with a public key in
+the subject, it adds the funds to a {\em reserve} identified by the
+withdrawl authorization key. By signing the withdrawl messages using
+the withdrawl authorization key, the customer can prove to the mint
+that he is authorized to withdraw anonymous digital coins from the
+reserve. The mint will record the withdrawl messages with the reserve
+record as proof that the anonymous digital coin was created for the
+correct customer.
+
+After a coin is minted, the customer is the only entity that knows the
+private key of the coin, making him the \emph{owner} of the coin. The
+coin can be identified by the mint by its public key; however, due to
+the use of blind signatures, the mint does not learn the public key
+during the minting process. Knowledge of the private key of the coin
+enables the owner to spent the coin. If the private key is shared
+with others, they also become owners of the coin.
+
+\subsection{Coin spending}
+
+To spent a coin, the coin's owner needs to sign a {\em deposit
+ request} specifying the amount, the merchant's account information
+and a {\em business transaction-specific hash} using the coin's
+private key. A merchant can then transfer this permission of the
+coin's owner to the mint to obtain the amount in traditional currency.
+If the customer is cheating and the coin was already spent, the mint
+provides cryptographic proof of the fraud to the merchant, who will
+then refuse the transaction.
+% The mint is typically expected
+%to transfer the funds to the merchant using a SEPA transfer or similar
+%methods appropriate to the domain of the traditional currency.
+
+%The mint needs to ensure that a coin can only be spent once. This is
+%done by storing the public keys of all deposited coins (together with
+%the deposit request and the owner's signature confirming the
+%transaction). The mint's state can be limited as coins signed with
+%expired coin sigining keys do not have to be retained.
+
+\paragraph{Partial spending.}
+
+To allow exact payments without requiring the customer to keep a large
+amount of ``change'' in stock, the payment systems allows partial
+spending of coins. Consequently, the mint the must not only store the
+identifiers of spent coins, but also the fraction of the coin that has
+been spent.
+
+%\paragraph{Online checks.}
+%
+%For secure transactions (non-microdonations), the merchant is expected
+%to perform an online check to detect double-spending. In the simplest
+%case, the merchant simply directly confirms the validity of the
+%deposit permission signed by the coin's owner with the mint, and then
+%proceeds with the contract.
+
+\paragraph{Incremental payments.}
+
+For services that include pay-as-you-go billing, customers can over
+time sign deposit permissions for an increasing fraction of the value
+of a coin to be paid to a particular merchant. As checking with the
+mint for each increment might be expensive, the coin's owner can
+instead sign a {\em lock permission}, which allows the merchant to get
+an exclusive right to redeem deposit permissions for the coin for a
+limited duration. The merchant uses the lock permission to determine
+if the coin has already been spent and to ensure that it cannot be
+spent by another merchant for the {\em duration} of the lock as
+specified in the lock permission. If the coin has been spent or is
+already locked, the mint provides the owner's deposit or locking
+request and signature to prove the attempted fraud by the customer.
+Otherwise, the mint locks the coin for the expected duration of the
+transaction (and remembers the lock permission). The merchant and the
+customer can then finalize the business transaction, possibly
+exchanging a series of incremental payment permissions for services.
+Finally, the merchant then redeems the coin at the mint before the
+lock permission expires to ensure that no other merchant spends the
+coin first.
+
+
+\paragraph{Probabilistic spending.}
+
+Similar to Peppercoin, Taler supports probabilistic spending of coins to
+support cost-effective transactions for small amounts. Here, an
+ordinary transaction is performed based on the result of a biased coin
+flip with a probability related to the desired transaction amount in
+relation to the value of the coin. Unlike Peppercoin, in Taler either
+the merchant wins and the customer looses the coin, or the merchant
+looses and the customer keeps the coin. Thus, there is no opportunity
+for the merchant and the customer to conspire against the mint. To
+determine if the coin is to be transferred, merchant and customer
+execute a secure coin flipping protocol~\cite{blum1981}. The commit
+values are included in the business contract and are revealed after
+the contract has been signed using the private key of the coin. If
+the coin flip is decided in favor of the merchant, the merchant can
+redeem the coin at the mint.
+
+One issue in this protocol is that the customer may use a worthless
+coin by offering a coin that has already been spent. This kind of
+fraud would only be detected if the customer actually lost the coin
+flip, and at this point the merchant might not be able to recover from
+the loss. A fradulent anonymous customer may run the protocol using
+already spent coins until the coin flip is in his favor. As with
+incremental spending, lock permissions could be used to ensure that
+the customer cannot defraud the merchant by offering a coin that has
+already been spent. However, as this means involving the mint even if
+the merchant looses the coin flip, such a scheme is unsuitable for
+microdonations as the transaction costs from involving the mint might
+be disproportionate to the value of the transaction, and thus with
+locking the probabilistic scheme has no advantage over simply using
+fractional payments.
+
+Hence, Taler uses probabilistic transactions {\em without} the online
+double-spending detection. This enables the customer to defraud the
+merchant by paying with a coin that was already spent. However, as,
+by definition, such microdonations are for tiny amounts, the incentive
+for customers to pursue this kind of fraud is limited.
+
+
+\subsection{Refreshing Coins}
+
+In the payment scenarios there are several cases where a customer will
+reveal the public key of a coin to a merchant, but not ultimately sign
+over the full value of the coin. If the customer then continues to
+use the remainder of the value of the coin in other transactions,
+merchants and the mint could link the various transactions as they all
+share the same public key for the coin.
+
+Thus, the owner might want to exchange such a {\em dirty} coin for a
+{\em fresh} coin to ensure unlinkability of future transactions with
+the previous operation. Even if a coin is not dirty, the owner of a
+coin may want to exchange a coin if the respective coin signing key is
+about to expire. All of these operations are supported with the {\em
+ coin refreshing protocol}, which allows the owner of a coin to
+exchange existing coins (or their remaining value) for fresh coins
+with a new public-private key pairs. Refreshing does not use the
+ordinary spending operation as the owner of a coin should not have to
+pay taxes on this operation. Because of this, the refreshing protocol
+must assure that owner stays the same. After all, the coin refreshing
+protocol must not be usable for transactions, as transactions in Taler
+must be taxable.
+
+Thus, one main goal of the refreshing protocol is that the mint must
+not be able to link the fresh coin's public key to the public key of
+the dirty coin. The second main goal is to enable the mint to ensure
+that the owner of the dirty coin can determine the private key of the
+fresh coin. This way, refreshing cannot be used to construct a
+transaction --- the owner of the dirty coin remains in control of the
+fresh coin.
+
+As with other operations, the refreshing protocol must also protect
+the mint from double-spending; similarly, the customer has to have
+cryptographic evidence if there is any misbehaviour by the mint.
+Finally, the mint may choose to charge a transaction fee for
+refreshing by reducing the value of the generated fresh coins
+in relation to the value of the melted coins.
+%Naturally, all such transaction fees should be clearly stated as part
+%of the business contract offered by the mint to customers and
+%merchants.
+
+
+\section{Taler's Cryptographic Protocols}
+
+% In this section, we describe the protocols for Taler in detail.
+
+For the sake of brevity, we do not specifically state that the
+recipient of a signed message always first checks that the signature
+is valid. Also, whenever a signed message is transmitted, it is
+assumed that the receiver is told the public key (or knows it from the
+context) and that the signature contains additional identification as
+to the purpose of the signature (such that it is not possible to
+use a signature from one protocol step in a different context).
+
+When the mint signs messages (not coins), an {\em online message
+ signing key} of the mint is used. The mint's long-term offline key
+is used to certify both the coin signing keys as well as the online
+message signing key of the mint. The mint's long-term offline key is
+assumed to be well-known to both customers and merchants, for example
+because it is certified by the auditors.
+
+As we are dealing with financial transactions, we explicitly state
+whenever entities need to safely commit data to persistent storage.
+As long as those commitments persist, the protocol can be safely
+resumed at any step. Commitments to disk are cummulative, that is an
+additional commitment does not erase the previously committed
+information. Keys and thus coins always have a well-known expiration
+date; information committed to disk can be discarded after the
+expiration date of the respective public key. Customers can also
+discard information once the respective coins have been fully spent,
+and merchants may discard information once payments from the mint have
+been received (assuming records are also no longer needed for tax
+authorities). The mint's bank transfers dealing in traditional
+currency are expected to be recorded for tax authorities to ensure
+taxability.
+
+\subsection{Withdrawal}
+
+To withdraw anonymous digital coins, the customer performs the
+following interaction with the mint:
+
+\begin{enumerate}
+ \item The customer identifies a mint with an auditor-approved
+ coin signing public-private key pair $K := (K_s, K_p)$
+ and randomly generates:
+ \begin{itemize}
+ \item withdrawal key $W := (W_s,W_p)$ with private key $W_s$ and public key $W_p$,
+ \item coin key $C := (C_s,C_p)$ with private key $C_s$ and public key $C_p$,
+ \item blinding factor $b$,
+ \end{itemize}
+ and commits $\langle W, C, b \rangle$ to disk.
+ \item The customer transfers an amount of money corresponding to (at least) $K_p$ to the mint, with $W_p$ in the subject line of the transaction.
+ \item The mint receives the transaction and credits the $W_p$ reserve with the respective amount in its database.
+ \item The customer sends $S_W(E_b(C_p))$ to the mint to request withdrawl of $C$; here, $E_b$ denotes Chaum-style blinding with blinding factor $b$.
+ \item The mint checks if the same withdrawl request was issued before; in this case, it sends $S_{K}(E_b(C_p))$ to the customer.\footnote{Here $S_K$
+ denotes a Chaum-style blind signature with private key $K_s$.}
+ If this is a fresh withdrawl request, the mint performs the following transaction:
+ \begin{enumerate}
+ \item checks if the reserve $W_p$ has sufficient funds for a coin of value corresponding to $K_p$
+ \item stores the withdrawl request $\langle S_W(E_b(C_p)), S_K(E_b(C_p)) \rangle$ in its database for future reference,
+ \item deducts the amount corresponding to $K_p$ from the reserve,
+ \item and sends $S_{K}(E_b(C_p))$ to the customer.
+ \end{enumerate}
+ If the guards for the transaction fail, the mint sends an descriptive error back to the customer,
+ with proof that it operated correctly (i.e. by showing the transaction history for the reserve).
+ \item The customer computes (and verifies) the unblind signature $S_K(C_p) = D_b(S_K(E_b(C_p)))$.
+ The customer writes $\langle S_K(C_p), C_s \rangle$ to disk (effectively adding the coin to the
+ local wallet) for future use.
+\end{enumerate}
+
+\subsection{Exact, partial and incremental spending}
+
+A customer can spend coins at a merchant, under the condition that the
+merchant trusts the mint that minted the coin. Merchants are
+identified by their public key $M := (M_s, M_p)$, which must be known
+to the customer apriori.
+
+The following steps describe the protocol between customer, merchant and mint
+for a transaction involving a coin $C := (C_s, C_p)$ which is previously signed
+by a mint's denomination key $K$, i.e. the customer posses
+$\widetilde{C} := S_K(C_p)$:
+
+\begin{enumerate}
+\item\label{offer} The merchant sends an \emph{offer:} $\langle S_M(m, f),
+ \vec{D} \rangle$ containing the price of the offer $f$, a transaction
+ ID $m$ and the list of mints $D_1, \ldots, D_n$ accepted by the merchant
+ where each $D_i$ is a mint's public key.
+\item\label{lock} The customer must possess or acquire a coin minted by a mint that is
+ accepted by the merchant, i.e. $K$ should be publicly signed by some $D_i
+ \in \{D_1, D_2, \ldots, D_n\}$, and has a value $\geq f$.
+
+ Customer then generates a \emph{lock-permission} $\mathcal{L} :=
+ S_c(\widetilde{C}, t, m, f, M_p)$ where $t$ specifies the time until which the
+ lock is valid and sends $\langle \mathcal{L}, D_i\rangle$ to the merchant,
+ where $D_i$ is the mint which signed $K$.
+\item The merchant asks the mint to apply the lock by sending $\langle
+ \mathcal{L} \rangle$ to the mint.
+\item The mint validates $\widetilde{C}$ and detects double spending if there is
+ a lock-permission record $S_c(\widetilde{C}, t', m', f', M_p')$ where $(t',
+ m', f', M_p') \neq (t, m, f, M_p)$ or a \emph{deposit-permission} record for
+ $C$ and sends it to the merchant, who can then use it prove to the customer
+ and subsequently ask the customer to issue a new lock-permission.
+
+ If double spending is not found, the mint commits $\langle \mathcal{L} \rangle$ to disk
+ and notifies the merchant that locking was successful.
+\item\label{contract} The merchant creates a digitally signed contract
+ $\mathcal{A} := S_M(m, f, a, H(p, r))$ where $a$ is data relevant to the contract
+ indicating which services or goods the merchant will deliver to the customer, and $p$ is the
+ merchant's payment information (e.g. his IBAN number) and $r$ is an random nounce.
+ The merchant commits $\langle \mathcal{A} \rangle$ to disk and sends it to the customer.
+\item The customer creates a
+ \emph{deposit-permission} $\mathcal{D} := S_c(\widetilde{C}, f, m, M_p, H(a), H(p, r))$, commits
+ $\langle \mathcal{A}, \mathcal{D} \rangle$ to disk and sends $\mathcal{D}$ to the merchant.
+\item\label{invoice_paid} The merchant commits the received $\langle \mathcal{D} \rangle$ to disk.
+\item The merchant gives $(\mathcal{D}, p, r)$ to the mint, revealing his
+ payment information.
+\item The mint verifies $(\mathcal{D}, p, r)$ for its validity. A
+ \emph{deposit-permission} for a coin $C$ is valid if:
+ \begin{itemize}
+ \item $C$ is not refreshed already
+ \item there exists no other \emph{deposit-permission} on disk for \\
+ $\mathcal{D'} := S_c(\widetilde{C}, f', m', M_p', H(a'), H(p', r'))$ for $C$
+ such that \\ $(f', m',M_p', H(a')) \neq (f, m, M_p, H(a))$
+ \item $H(p, r) := H(p', r')$
+ \end{itemize}
+ If $C$ is valid and no other \emph{deposit-permission} for $C$ exists on disk, the
+ mint does the following:
+ \begin{enumerate}
+ \item if a \emph{lock-permission} exists for $C$, it is deleted from disk
+ \item\label{transfer} transfers an amount of $f$ to the merchant's bank account
+ given in $p$. The subject line of the transaction to $p$ must contain
+ $H(\mathcal{D})$.
+ \item $\langle \mathcal{D}, p, r \rangle$ is commited to disk.
+ \end{enumerate}
+ If the deposit record $\langle \mathcal{D}, p, r \rangle$ already exists,
+ the mint sends it to the merchant, but does not transfer money to $p$ again.
+\end{enumerate}
+
+To facilitate incremental spending of a coin $C$ in a single transaction, the
+merchant makes an offer in Step~\ref{offer} with a maximum amount $f_{max}$ he
+is willing to charge in this transaction from the coin $C$. After obtaining the
+lock on $C$ for $f_{max}$, the merchant makes a contract in Step~\ref{contract}
+with an amount $f \leq f_{max}$. The protocol follows with the following steps
+repeated after Step~\ref{invoice_paid} whenever the merchant wants to charge an
+incremental amount up to $f_{max}$:
+
+\begin{enumerate}
+ \setcounter{enumi}{4}
+\item The merchant generates a new contract $ \mathcal{A}' := S_M(m, f', a', H(p,
+ r)) $ after obtaining the deposit-permission for a previous contract. Here
+ $f'$ is the accumulated sum the merchant is charging the customer, of which
+ the merchant has received a deposit-permission for $f$ from the previous
+ contract \textit{i.e.}~$f <f' \leq f_{max}$. Similarly $a'$ is the new
+ contract data appended to older contract data $a$.
+ The merchant commits $\langle \mathcal{A}' \rangle$ to disk and sends it to the customer.
+\item Customer commits $\langle \mathcal{A}' \rangle$ to disk, creates
+ $\mathcal{D}' := S_c(\widetilde{C}, f', m, M_p, H(a'), H(p, r))$, commits
+ $\langle \mathcal{D'} \rangle$ and sends it to the merchant.
+\item The merchant commits the received $\langle \mathcal{D'} \rangle$ and
+ deletes the older $\mathcal{D}$
+\end{enumerate}
+
+%Figure~\ref{fig:spending_protocol_interactions} summarizes the interactions of the
+%coin spending protocol.
+
+For transactions with multiple coins, the steps of the protocol are executed in
+parallel for each coin.
+
+During the time a coin is locked, it may not be spent at a
+different merchant. To make the storage costs of the mint more predictable,
+only one lock per coin can be active at any time, even if the lock only covers a
+fraction of the coin's denomination. The mint will delete the locks when they
+expire. Thus the coins can be reused once their locks expire. However, doing
+so may link the new transaction to older transaction.
+
+Similarly, if a transaction is aborted after Step 2, subsequent transactions
+with the same coin can be linked to the coin, but not directly to the coin's
+owner. The same applies to partially spent coins. To unlink subsequent
+transactions from a coin, the customer has to execute the coin refreshing
+protocol with the mint.
+
+%\begin{figure}[h]
+%\centering
+%\begin{tikzpicture}
+%
+%\tikzstyle{def} = [node distance= 1em, inner sep=.5em, outer sep=.3em];
+%\node (origin) at (0,0) {};
+%\node (offer) [def,below=of origin]{make offer (merchant $\rightarrow$ customer)};
+%\node (A) [def,below=of offer]{permit lock (customer $\rightarrow$ merchant)};
+%\node (B) [def,below=of A]{apply lock (merchant $\rightarrow$ mint)};
+%\node (C) [def,below=of B]{confirm (or refuse) lock (mint $\rightarrow$ merchant)};
+%\node (D) [def,below=of C]{sign contract (merchant $\rightarrow$ customer)};
+%\node (E) [def,below=of D]{permit deposit (customer $\rightarrow$ merchant)};
+%\node (F) [def,below=of E]{make deposit (merchant $\rightarrow$ mint)};
+%\node (G) [def,below=of F]{transfer confirmation (mint $\rightarrow$ merchant)};
+%
+%\tikzstyle{C} = [color=black, line width=1pt]
+%\draw [->,C](offer) -- (A);
+%\draw [->,C](A) -- (B);
+%\draw [->,C](B) -- (C);
+%\draw [->,C](C) -- (D);
+%\draw [->,C](D) -- (E);
+%\draw [->,C](E) -- (F);
+%\draw [->,C](F) -- (G);
+%
+%\draw [->,C, bend right, shorten <=2mm] (E.east)
+% to[out=-135,in=-45,distance=3.8cm] node[left] {aggregate} (D.east);
+%\end{tikzpicture}
+%\caption{Interactions between a customer, merchant and mint in the coin spending
+% protocol}
+%\label{fig:spending_protocol_interactions}
+%\end{figure}
+
+
+\subsection{Probabilistic spending}
+
+The following steps are executed for microdonations with upgrade probability $p$:
+\begin{enumerate}
+ \item The merchant sends an offer to the customer.
+ \item The customer sends a commitment $H(r_c)$ to a random
+ value $r_c \in [0,2^R)$, where $R$ is a system parameter.
+ \item The merchant sends random $r_m \in [0,2^R)$ to the customer.
+ \item The customer computes $p' := (|r_c - r_m|) / (2^R)$.
+ If $p' < p$, the customer sends a coin with deposit-permission to the merchant.
+ Otherwise, the customer sends $r_c$ to the merchant.
+ \item The merchant deposits the coin, or checks if $r_c$ is consistent
+ with $H(r_c)$.
+\end{enumerate}
+
+\subsection{Refreshing}
+
+The following protocol is executed in order to refresh a coin $C'$ of denomination $K$ to
+a fresh coin $\widetilde{C}$ with the same denomination. In the protocol, $\kappa \ge 3$ is a security parameter.
+
+\begin{enumerate}
+ \item For each $i = 1,\ldots,\kappa$, the customer
+ \begin{itemize}
+ \item randomly generates transfer key $T^{(i)} := \left(t^{(i)}_s,T^{(i)}_p\right)$ where $T^{(i)}_p := t^{(i)}_s \cdot G$,
+ \item randomly generates coin key pair $C^{(i)} := \left(c_s^{(i)}, C_p^{(i)}\right)$ where $C^{(i)}_p := c^{(i)}_s \cdot G$,
+ \item randomly generates blinding factors $b_i$,
+ \item computes $E_i := E_{K_i}\left(c_s^{(i)}, b_i\right)$ where $K_i := c'_s \cdot T_p^{(i)}$ (The encryption key $K_i$ is
+ computed by multiplying the private key $c'_s$ of the original coin with the point on the curve
+ that represents the public key of the transfer key $T^{(i)}$.),
+ \end{itemize}
+ and commits $\langle C', \vec{T}, \vec{C}, \vec{b} \rangle$ to disk.
+ \item The customer computes $B_i := E_{b_i}(C^{(i)}_p)$ and sends commitments
+ $S_{C'}(\vec{E}, \vec{B}, \vec{T}))$ for $i=1,\ldots,\kappa$ to the mint;
+ here $E_{b_i}$ denotes Chaum-style blinding with blinding factor $b_i$.
+ \item The mint generates a random $\gamma$ with $1 \le \gamma \le \kappa$ and
+ marks $C'_p$ as spent by committing
+ $\langle C', \gamma, S_{C'}(\vec{E}, \vec{B}, \vec{T}) \rangle$ to disk
+ \item The mint sends $S_K(C'_p, \gamma)$ to the customer.\footnote{Instead of $K$, it is also
+ possible to use any equivalent mint signing key known to the customer here, as $K$ merely
+ serves as proof to the customer that the mint selected this particular $\gamma$.}
+ \item The customer commits $\langle C', S_K(C'_p, \gamma) \rangle$ to disk.
+ \item The customer computes $\mathfrak{R} := \left(t_s^{(i)}, C_p^{(i)}, b_i\right)_{i \ne \gamma}$
+ and sends $S_{C'}(\mathfrak{R})$ to the mint.
+ \item \label{step:refresh-ccheck} The mint checks whether $\mathfrak{R}$ is consistent with the commitments;
+ specifically, it computes for $i \not= \gamma$:
+ \begin{itemize}
+ \item $\overline{K}_i := t_s^{(i)} \cdot C_p'$,
+ \item $(\overline{c}_s^{(i)}, \overline{b}_i) := D_{\overline{K}_i}(E_i)$,
+ \item $\overline{C}^{(i)}_p := \overline{c}_s^{(i)} \cdot G$,
+ \item $\overline{B}_i := E_{b_i}(C_p^{(i)})$,
+ \item $\overline{T}_i := t_s^{(i)} G$,
+ \end{itemize}
+ and checks if $\overline{C}^{(i)}_p = C^{(i)}_p$ and $H(E_i, \overline{B}_i, \overline{T}^{(i)}_p) = H(E_i, B_i, T^{(i)}_p)$
+ and $\overline{T}_i = T_i$.
+
+ \item \label{step:refresh-done} If the commitments were consistent, the mint sends the blind signature
+ $\widetilde{C} := S_{K}(B_\gamma)$ to the customer.
+ Otherwise, the mint responds with an error and confiscates the value of $C'$,
+ committing $\langle C', \gamma, S_{C'}(\mathfrak{R}) \rangle$ to disk as proof for the attempted fraud.
+\end{enumerate}
+
+%\subsection{N-to-M Refreshing}
+%
+%TODO: Explain, especially subtleties regarding session key / the spoofing attack that requires signature.
+
+\subsection{Linking}
+
+For a coin that was successfully refreshed, the mint responds to
+a request $S_{C'}(\mathtt{link})$ with $(T^{(\gamma)}_p$, $E_{\gamma}, \widetilde{C})$.
+
+This allows the owner of the old coin to also obtain the private key
+of the new coin, even if the refreshing protocol was illicitly
+executed by another party who learned $C'_s$ from the old owner.
+
+
+\section{Discussion}
+
+\subsection{Offline Payments}
+
+Chaum's original proposals for anonymous digital cash avoided the
+locking and online spending steps detailed in this proposal by
+providing a means to deanonymize customers involved in
+double-spending. We believe that this is problematic as the mint or
+the merchant will then still need out-of-band means to recover funds
+from the customer, which may be impossible in practice. In contrast,
+in our design only the mint may try to defraud the other participants
+and disappear. While this is still a risk, this is likely manageable,
+especially compared to recovering funds via the court system from
+customers.
+
+
+\subsection{Bona-fide microdonations}
+
+Evidently the customer can ``cheat'' by aborting the transaction in
+Step 3 of the microdonation protocol if the outcome is unfavourable ---
+and repeat until he wins. This is why Taler is suitable for
+microdonations --- where the customer voluntarily contributes ---
+and not for micropayments.
+
+Naturally, if the donations requested are small, the incentive to
+cheat for minimal gain should be quite low. Payment software could
+embrace this fact by providing an appeal to conscience in form of an
+option labeled ``I am unethical and want to cheat'', which executes
+the dishonest version of the payment protocol.
+
+If an organization detects that it cannot support itself with
+microdonations, it can always choose to switch to the macropayment
+system with slightly higher transaction costs to remain in business.
+
+\subsection{Merchant Tax Audits}
+
+For a tax audit on the merchant, the mint includes the business
+transaction-specific hash in the transfer of the traditional
+currency. A tax auditor can then request the merchant to reveal
+(meaningful) details about the business transaction ($\mathcal{D}$,
+$a$, $p$, $r$), including proof that applicable taxes were paid.
+
+If a merchant is not able to provide theses values, he can be punished
+in relation to the amount transferred by the traditional currency
+transfer.
+
+
+\section{Future Work}
+
+%The legal status of the system needs to be investigated in the various
+%legal systems of the world. However, given that the system enables
+%taxation and is able to impose withdrawl limits and thus is not
+%suitable for money laundering, we are optimistic that states will find
+%the design desirable.
+
+We did not yet perform performance measurements for the various
+operations. However, we are pretty sure that the computational and
+bandwidth cost for transactions described in this paper is likely
+small compared to other business costs for the mint. We expect costs
+within the system to be dominated by the (replicated, transactional)
+database. However, these expenses are again likely small in relation
+to the business cost of currency transfers using traditional banking.
+Here, mint operators should be able to reduce their expenses by
+aggregating multiple transfers to the same merchant.
+
+
+\section{Conclusion}
+
+We have presented an efficient electronic payment system that
+simultaneously addresses the conflicting objectives created by the
+citizen's need for privacy and the state's need for taxation. The
+coin refreshing protocol makes the design flexible and enables a
+variety of payment methods. The libre implementation and open
+protocol may finally enable modern society to upgrade to proper
+electronic wallets with efficient, secure and privacy-preserving
+transactions.
+
+\bibliographystyle{alpha}
+\bibliography{taler}
+\end{document}
diff --git a/src/.gitignore b/src/.gitignore
new file mode 100644
index 00000000..90ea1a04
--- /dev/null
+++ b/src/.gitignore
@@ -0,0 +1,9 @@
+*.o
+*.deps
+*.libs
+*.lo
+*.la
+*.log
+*.trs
+*/__pycache__
+test-* \ No newline at end of file
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 00000000..485c4f9d
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,2 @@
+AM_CPPFLAGS = -I$(top_srcdir)/src/include
+SUBDIRS = include util mint
diff --git a/src/include/Makefile.am b/src/include/Makefile.am
new file mode 100644
index 00000000..d10d6d70
--- /dev/null
+++ b/src/include/Makefile.am
@@ -0,0 +1,7 @@
+EXTRA_DIST = \
+ platform.h \
+ taler_blind.h \
+ taler_signatures.h \
+ taler_types.h \
+ taler_util.h \
+ taler_rsa.h
diff --git a/src/include/platform.h b/src/include/platform.h
new file mode 100644
index 00000000..4cba7abf
--- /dev/null
+++ b/src/include/platform.h
@@ -0,0 +1,56 @@
+/*
+ This file is part of TALER
+ (C) 2014 Chrisitan Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file include/platform.h
+ * @brief This file contains the includes and definitions which are used by the
+ * rest of the modules
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ */
+
+#ifndef PLATFORM_H_
+#define PLATFORM_H_
+
+/* Include our configuration header */
+#ifndef HAVE_USED_CONFIG_H
+# define HAVE_USED_CONFIG_H
+# ifdef HAVE_CONFIG_H
+# include "taler_config.h"
+# endif
+#endif
+
+
+#if (GNUNET_EXTRA_LOGGING >= 1)
+#define VERBOSE(cmd) cmd
+#else
+#define VERBOSE(cmd) do { break; }while(0)
+#endif
+
+/* Include the features available for GNU source */
+#define _GNU_SOURCE
+
+/* Include GNUnet's platform file */
+#include <gnunet/platform.h>
+
+/* Do not use shortcuts for gcrypt mpi */
+#define GCRYPT_NO_MPI_MACROS 1
+
+/* Do not use deprecated functions from gcrypt */
+#define GCRYPT_NO_DEPRECATED 1
+
+#endif /* PLATFORM_H_ */
+
+/* end of platform.h */
diff --git a/src/include/taler_db_lib.h b/src/include/taler_db_lib.h
new file mode 100644
index 00000000..41b46264
--- /dev/null
+++ b/src/include/taler_db_lib.h
@@ -0,0 +1,132 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+
+/**
+ * @file include/taler_db_lib.h
+ * @brief helper functions for DB interactions
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ * @author Florian Dold
+ */
+
+#ifndef TALER_DB_LIB_H_
+#define TALER_DB_LIB_H_
+
+#include <libpq-fe.h>
+#include "taler_util.h"
+
+#define TALER_DB_QUERY_PARAM_END { NULL, 0, 0 }
+#define TALER_DB_QUERY_PARAM_PTR(x) { (x), sizeof (*(x)), 1 }
+#define TALER_DB_QUERY_PARAM_PTR_SIZED(x, s) { (x), (s), 1 }
+
+
+#define TALER_DB_RESULT_SPEC_END { NULL, 0, NULL }
+#define TALER_DB_RESULT_SPEC(name, dst) { (void *) (dst), sizeof (*(dst)), (name) }
+#define TALER_DB_RESULT_SPEC_SIZED(name, dst, s) { (void *) (dst), (s), (name) }
+
+
+/**
+ * Description of a DB query parameter.
+ */
+struct TALER_DB_QueryParam
+{
+ /**
+ * Data or NULL
+ */
+ const void *data;
+ /**
+ * Size of 'data'
+ */
+ size_t size;
+ /**
+ * Non-null if this is not the last parameter.
+ * This allows for null as sentinal value.
+ */
+ int more;
+};
+
+
+/**
+ * Description of a DB result cell.
+ */
+struct TALER_DB_ResultSpec
+{
+ /**
+ * Destination for the data.
+ */
+ void *dst;
+
+ /**
+ * Allowed size for the data.
+ */
+ size_t dst_size;
+
+ /**
+ * Field name of the desired result.
+ */
+ char *fname;
+};
+
+
+/**
+ * Execute a prepared statement.
+ */
+PGresult *
+TALER_DB_exec_prepared (PGconn *db_conn,
+ const char *name,
+ const struct TALER_DB_QueryParam *params);
+
+
+/**
+ * Extract results from a query result according to the given specification.
+ * If colums are NULL, the destination is not modified, and GNUNET_NO
+ * is returned.
+ *
+ * @return
+ * GNUNET_YES if all results could be extracted
+ * GNUNET_NO if at least one result was NULL
+ * GNUNET_SYSERR if a result was invalid (non-existing field)
+ */
+int
+TALER_DB_extract_result (PGresult *result, struct TALER_DB_ResultSpec *rs, int row);
+
+
+int
+TALER_DB_field_isnull (PGresult *result,
+ int row,
+ const char *fname);
+
+
+int
+TALER_DB_extract_amount_nbo (PGresult *result,
+ int row,
+ const char *val_name,
+ const char *frac_name,
+ const char *curr_name,
+ struct TALER_AmountNBO *r_amount_nbo);
+
+
+int
+TALER_DB_extract_amount (PGresult *result,
+ int row,
+ const char *val_name,
+ const char *frac_name,
+ const char *curr_name,
+ struct TALER_Amount *r_amount);
+
+#endif /* TALER_DB_LIB_H_ */
+
+/* end of include/taler_db_lib.h */
diff --git a/src/include/taler_json_lib.h b/src/include/taler_json_lib.h
new file mode 100644
index 00000000..b224c4b3
--- /dev/null
+++ b/src/include/taler_json_lib.h
@@ -0,0 +1,101 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file include/taler_json_lib.h
+ * @brief helper functions for JSON processing using libjansson
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ */
+
+#ifndef TALER_JSON_LIB_H_
+#define TALER_JSON_LIB_H_
+
+#include <jansson.h>
+
+
+/**
+ * Convert a TALER amount to a JSON
+ * object.
+ *
+ * @param amount the amount
+ * @return a json object describing the amount
+ */
+json_t *
+TALER_JSON_from_amount (struct TALER_Amount amount);
+
+
+/**
+ * Convert absolute timestamp to a json string.
+ *
+ * @param the time stamp
+ * @return a json string with the timestamp in @a stamp
+ */
+json_t *
+TALER_JSON_from_abs (struct GNUNET_TIME_Absolute stamp);
+
+
+
+/**
+ * Convert binary data to a JSON string
+ * with the base32crockford encoding.
+ *
+ * @param data binary data
+ * @param size size of @a data in bytes
+ * @return json string that encodes @a data
+ */
+json_t *
+TALER_JSON_from_data (const void *data, size_t size);
+
+
+/**
+ * Parse given JSON object to Amount
+ *
+ * @param json the json object representing Amount
+ * @param r_amount where the amount has to be written
+ * @return GNUNET_OK upon successful parsing; GNUNET_SYSERR upon error
+ */
+int
+TALER_JSON_to_amount (json_t *json,
+ struct TALER_Amount *r_amount);
+
+/**
+ * Parse given JSON object to absolute time.
+ *
+ * @param json the json object representing absolute time in seconds
+ * @param r_abs where the time has to be written
+ * @return GNUNET_OK upon successful parsing; GNUNET_SYSERR upon error
+ */
+int
+TALER_JSON_to_abs (json_t *json,
+ struct GNUNET_TIME_Absolute *r_abs);
+
+/**
+ * Parse given JSON object to data
+ *
+ * @param json the json object representing data
+ * @param out the pointer to hold the parsed data.
+ * @param out_size the size of r_data.
+ * @return GNUNET_OK upon successful parsing; GNUNET_SYSERR upon error
+ */
+int
+TALER_JSON_to_data (json_t *json,
+ void *out,
+ size_t out_size);
+
+
+#endif /* TALER_JSON_LIB_H_ */
+
+/* End of taler_json_lib.h */
diff --git a/src/include/taler_microhttpd_lib.h b/src/include/taler_microhttpd_lib.h
new file mode 100644
index 00000000..da601401
--- /dev/null
+++ b/src/include/taler_microhttpd_lib.h
@@ -0,0 +1,119 @@
+
+
+#ifndef TALER_MICROHTTPD_LIB_H_
+#define TALER_MICROHTTPD_LIB_H_
+
+
+#include <microhttpd.h>
+#include <jansson.h>
+
+
+/**
+ * Constants for JSON navigation description.
+ */
+enum
+{
+ /**
+ * Access a field.
+ * Param: const char *
+ */
+ JNAV_FIELD,
+ /**
+ * Access an array index.
+ * Param: int
+ */
+ JNAV_INDEX,
+ /**
+ * Return base32crockford encoded data of
+ * constant size.
+ * Params: (void *, size_t)
+ */
+ JNAV_RET_DATA,
+ /**
+ * Return base32crockford encoded data of
+ * variable size.
+ * Params: (void **, size_t *)
+ */
+ JNAV_RET_DATA_VAR,
+ /**
+ * Return a json object, which must be
+ * of the given type (JSON_* type constants,
+ * or -1 for any type).
+ * Params: (int, json_t **)
+ */
+ JNAV_RET_TYPED_JSON
+};
+
+
+
+/**
+ * Send JSON object as response. Decreases
+ * the reference count of the JSON object.
+ *
+ * @param connection the MHD connection
+ * @param json the json object
+ * @param status_code the http status code
+ * @return MHD result code (MHD_YES on success)
+ */
+int
+send_response_json (struct MHD_Connection *connection,
+ json_t *json,
+ unsigned int status_code);
+
+
+/**
+ * Send a JSON object via an MHD connection,
+ * specified with the JANSSON pack syntax (see json_pack).
+ *
+ * @param connection connection to send the JSON over
+ * @param http_code HTTP status for the response
+ * @param fmt format string for pack
+ * @param ... varargs
+ * @return MHD_YES on success or MHD_NO on error
+ */
+int
+request_send_json_pack (struct MHD_Connection *connection,
+ unsigned int http_code,
+ const char *fmt, ...);
+
+
+/**
+ * Process a POST request containing a JSON object.
+ *
+ * @param connection the MHD connection
+ * @param con_cs the closure (contains a 'struct Buffer *')
+ * @param upload_data the POST data
+ * @param upload_data_size the POST data size
+ * @param json the JSON object for a completed request
+ *
+ * @returns
+ * GNUNET_YES if json object was parsed
+ * GNUNET_NO is request incomplete or invalid
+ * GNUNET_SYSERR on internal error
+ */
+int
+process_post_json (struct MHD_Connection *connection,
+ void **con_cls,
+ const char *upload_data,
+ size_t *upload_data_size,
+ json_t **json);
+
+
+/**
+ * Navigate through a JSON tree.
+ *
+ * Sends an error response if navigation is impossible (i.e.
+ * the JSON object is invalid)
+ *
+ * @param connection the connection to send an error response to
+ * @param root the JSON node to start the navigation at.
+ * @param ... navigation specification (see JNAV_*)
+ * @return GNUNET_YES if navigation was successful
+ * GNUNET_NO if json is malformed, error response was generated
+ * GNUNET_SYSERR on internal error
+ */
+int
+request_json_require_nav (struct MHD_Connection *connection,
+ const json_t *root, ...);
+
+#endif /* TALER_MICROHTTPD_LIB_H_ */
diff --git a/src/include/taler_mint_service.h b/src/include/taler_mint_service.h
new file mode 100644
index 00000000..ee3b30e3
--- /dev/null
+++ b/src/include/taler_mint_service.h
@@ -0,0 +1,303 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file include/taler_mint_service.h
+ * @brief C interface to the mint's HTTP API
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ */
+
+#ifndef _TALER_MINT_SERVICE_H
+#define _TALER_MINT_SERVICE_H
+
+#include "taler_rsa.h"
+#include "taler_util.h"
+#include <jansson.h>
+
+/**
+ * Handle to this library context
+ */
+struct TALER_MINT_Context;
+
+/**
+ * Handle to the mint
+ */
+struct TALER_MINT_Handle;
+
+/**
+ * Mint's signature key
+ */
+struct TALER_MINT_SigningPublicKey
+{
+ /**
+ * The signing public key
+ */
+ struct GNUNET_CRYPTO_EddsaPublicKey key;
+
+ /**
+ * Validity start time
+ */
+ struct GNUNET_TIME_Absolute valid_from;
+
+ /**
+ * Validity expiration time
+ */
+ struct GNUNET_TIME_Absolute valid_until;
+};
+
+
+/**
+ * Mint's denomination key
+ */
+struct TALER_MINT_DenomPublicKey
+{
+ /**
+ * The public key
+ */
+ struct TALER_RSA_PublicKeyBinaryEncoded key;
+
+ /**
+ * Timestamp indicating when the denomination key becomes valid
+ */
+ struct GNUNET_TIME_Absolute valid_from;
+
+ /**
+ * Timestamp indicating when the denomination key can’t be used anymore to
+ * withdraw new coins.
+ */
+ struct GNUNET_TIME_Absolute withdraw_valid_until;
+
+ /**
+ * Timestamp indicating when coins of this denomination become invalid.
+ */
+ struct GNUNET_TIME_Absolute deposit_valid_until;
+
+ /**
+ * The value of this denomination
+ */
+ struct TALER_Amount value;
+
+ /**
+ * The applicable fee for withdrawing a coin of this denomination
+ */
+ struct TALER_Amount fee_withdraw;
+
+ /**
+ * The applicable fee to spend a coin of this denomination
+ */
+ struct TALER_Amount fee_deposit;
+
+ /**
+ *The applicable fee to refresh a coin of this denomination
+ */
+ struct TALER_Amount fee_refresh;
+};
+
+
+/**
+ * Initialise a context. A context should be used for each thread and should
+ * not be shared among multiple threads.
+ *
+ * @return the context
+ */
+struct TALER_MINT_Context *
+TALER_MINT_init ();
+
+
+/**
+ * Cleanup library initialisation resources. This function should be called
+ * after using this library to cleanup the resources occupied during library's
+ * initialisation.
+ *
+ * @param ctx the library context
+ */
+void
+TALER_MINT_cleanup (struct TALER_MINT_Context *ctx);
+
+
+/**
+ * Initialise a connection to the mint.
+ *
+ * @param ctx the context
+ * @param hostname the hostname of the mint
+ * @param port the point where the mint's HTTP service is running. If port is
+ * given as 0, ports 80 or 443 are chosen depending on @a url.
+ * @param mint_key the public key of the mint. This is used to verify the
+ * responses of the mint.
+ * @return the mint handle; NULL upon error
+ */
+struct TALER_MINT_Handle *
+TALER_MINT_connect (struct TALER_MINT_Context *ctx,
+ const char *hostname,
+ uint16_t port,
+ struct GNUNET_CRYPTO_EddsaPublicKey *mint_key);
+
+/**
+ * Disconnect from the mint
+ *
+ * @param mint the mint handle
+ */
+void
+TALER_MINT_disconnect (struct TALER_MINT_Handle *mint);
+
+
+/**
+ * A handle to get the keys of a mint
+ */
+struct TALER_MINT_KeysGetHandle;
+
+/**
+ * Functions of this type are called to signal completion of an asynchronous call.
+ *
+ * @param cls closure
+ * @param emsg if the asynchronous call could not be completed due to an error,
+ * this parameter contains a human readable error message
+ */
+typedef void (*TALER_MINT_ContinuationCallback) (void *cls,
+ const char *emsg);
+
+/**
+ * Functions of this type are called to provide the retrieved signing and
+ * denomination keys of the mint. No TALER_MINT_*() functions should be called
+ * in this callback.
+ *
+ * @param cls closure passed to TALER_MINT_keys_get()
+ * @param sign_keys NULL-terminated array of pointers to the mint's signing
+ * keys. NULL if no signing keys are retrieved.
+ * @param denom_keys NULL-terminated array of pointers to the mint's
+ * denomination keys; will be NULL if no signing keys are retrieved.
+ */
+typedef void (*TALER_MINT_KeysGetCallback) (void *cls,
+ struct TALER_MINT_SigningPublicKey **sign_keys,
+ struct TALER_MINT_DenomPublicKey **denom_keys);
+
+
+/**
+ * Get the signing and denomination key of the mint.
+ *
+ * @param mint handle to the mint
+ * @param cb the callback to call with the keys
+ * @param cls closure for the above callback
+ * @param cont_cb the callback to call after completing this asynchronous call
+ * @param cont_cls the closure for the continuation callback
+ * @return a handle to this asynchronous call; NULL upon eror
+ */
+struct TALER_MINT_KeysGetHandle *
+TALER_MINT_keys_get (struct TALER_MINT_Handle *mint,
+ TALER_MINT_KeysGetCallback cb, void *cls,
+ TALER_MINT_ContinuationCallback cont_cb, void *cont_cls);
+
+/**
+ * Cancel the asynchronous call initiated by TALER_MINT_keys_get(). This should
+ * not be called if either of the @a TALER_MINT_KeysGetCallback or @a
+ * TALER_MINT_ContinuationCallback passed to TALER_MINT_keys_get() have been
+ * called.
+ *
+ * @param get the handle for retrieving the keys
+ */
+void
+TALER_MINT_keys_get_cancel (struct TALER_MINT_KeysGetHandle *get);
+
+
+/**
+ * A Deposit Handle
+ */
+struct TALER_MINT_DepositHandle;
+
+
+/**
+ * Callbacks of this type are used to serve the result of submitting a deposit
+ * permission object to a mint
+ *
+ * @param cls closure
+ * @param status 1 for successful deposit, 2 for retry, 0 for failure
+ * @param obj the received JSON object; can be NULL if it cannot be constructed
+ * from the reply
+ * @param emsg in case of unsuccessful deposit, this contains a human readable
+ * explanation.
+ */
+typedef void (*TALER_MINT_DepositResultCallback) (void *cls,
+ int status,
+ json_t *obj,
+ char *emsg);
+
+/**
+ * Submit a deposit permission to the mint and get the mint's response
+ *
+ * @param mint the mint handle
+ * @param cb the callback to call when a reply for this request is available
+ * @param cls closure for the above callback
+ * @param deposit_obj the deposit permission received from the customer along
+ * with the wireformat JSON object
+ * @return a handle for this request; NULL if the JSON object could not be
+ * parsed or is of incorrect format or any other error. In this case,
+ * the callback is not called.
+ */
+struct TALER_MINT_DepositHandle *
+TALER_MINT_deposit_submit_json (struct TALER_MINT_Handle *mint,
+ TALER_MINT_DepositResultCallback cb,
+ void *cls,
+ json_t *deposit_obj);
+
+
+#if 0
+/**
+ * Submit a deposit permission to the mint and get the mint's response.
+ *
+ * @param mint the mint handle
+ * @param cb the callback to call when a reply for this request is available
+ * @param cls closure for the above callback
+ * @param coin the public key of the coin
+ * @param denom_key denomination key of the mint which is used to blind-sign the
+ * coin
+ * @param ubsig the mint's unblinded signature
+ * @param transaction_id transaction identifier
+ * @param amount the amount to deposit
+ * @param merchant_pub the public key of the merchant
+ * @param h_contract hash of the contract
+ * @param h_wire hash of the wire format used
+ * @param csig signature of the coin over the transaction_id, amount,
+ * merchant_pub, h_contract and, h_wire
+ * @param wire_obj the wireformat object corresponding to h_wire
+ * @return a handle for this request
+ */
+struct TALER_MINT_DepositHandle *
+TALER_MINT_deposit_submit_json_ (struct TALER_MINT_Handle *mint,
+ TALER_MINT_DepositResultCallback *cb,
+ void *cls,
+ struct GNUNET_CRYPTO_EddsaPublicKey *coin_pub,
+ struct TALER_BLIND_SigningPublicKey *denom_pub,
+ struct TALER_BLIND_Signature *ubsig,
+ uint64_t transaction_id,
+ struct TALER_Amount *amount,
+ struct GNUNET_CRYPTO_EddsaPublicKey *merchant_pub,
+ struct GNUNET_HashCode *h_contract,
+ struct GNUNET_HashCode *h_wire,
+ struct GNUNET_CRYPTO_EddsaSignature *csig,
+ json_t *wire_obj);
+#endif
+
+
+/**
+ * Cancel a deposit permission request. This function cannot be used on a
+ * request handle if a response is already served for it.
+ *
+ * @param the deposit permission request handle
+ */
+void
+TALER_MINT_deposit_submit_cancel (struct TALER_MINT_DepositHandle *deposit);
+
+#endif /* _TALER_MINT_SERVICE_H */
diff --git a/src/include/taler_rsa.h b/src/include/taler_rsa.h
new file mode 100644
index 00000000..1ed53001
--- /dev/null
+++ b/src/include/taler_rsa.h
@@ -0,0 +1,357 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file include/taler_rsa.h
+ * @brief RSA key management utilities. Some code is taken from gnunet-0.9.5a
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ *
+ * Authors of the gnunet code:
+ * Christian Grothoff
+ * Krista Bennett
+ * Gerd Knorr <kraxel@bytesex.org>
+ * Ioana Patrascu
+ * Tzvetan Horozov
+ */
+
+#ifndef TALER_RSA_H
+#define TALER_RSA_H
+
+#include <gnunet/gnunet_common.h>
+#include <gnunet/gnunet_crypto_lib.h>
+
+/**
+ * Length of an RSA KEY (n,e,len), 2048 bit (=256 octests) key n, 2 byte e
+ */
+#define TALER_RSA_KEY_LENGTH 258
+
+/**
+ * @brief Length of RSA encrypted data (2048 bit)
+ *
+ * We currently do not handle encryption of data
+ * that can not be done in a single call to the
+ * RSA methods (read: large chunks of data).
+ * We should never need that, as we can use
+ * the GNUNET_CRYPTO_hash for larger pieces of data for signing,
+ * and for encryption, we only need to encode sessionkeys!
+ */
+#define TALER_RSA_DATA_ENCODING_LENGTH 256
+
+/**
+ * The private information of an RSA key pair.
+ */
+struct TALER_RSA_PrivateKey;
+
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * GNUnet mandates a certain format for the encoding
+ * of private RSA key information that is provided
+ * by the RSA implementations. This format is used
+ * to serialize a private RSA key (typically when
+ * writing it to disk).
+ */
+struct TALER_RSA_PrivateKeyBinaryEncoded
+{
+ /**
+ * Total size of the structure, in bytes, in big-endian!
+ */
+ uint16_t len GNUNET_PACKED;
+ uint16_t sizen GNUNET_PACKED; /* in big-endian! */
+ uint16_t sizee GNUNET_PACKED; /* in big-endian! */
+ uint16_t sized GNUNET_PACKED; /* in big-endian! */
+ uint16_t sizep GNUNET_PACKED; /* in big-endian! */
+ uint16_t sizeq GNUNET_PACKED; /* in big-endian! */
+ uint16_t sizedmp1 GNUNET_PACKED; /* in big-endian! */
+ uint16_t sizedmq1 GNUNET_PACKED; /* in big-endian! */
+ /* followed by the actual values */
+};
+GNUNET_NETWORK_STRUCT_END
+
+
+/**
+ * @brief an RSA signature
+ */
+struct TALER_RSA_Signature
+{
+ unsigned char sig[TALER_RSA_DATA_ENCODING_LENGTH];
+};
+
+GNUNET_NETWORK_STRUCT_BEGIN
+/**
+ * @brief header of what an RSA signature signs
+ * this must be followed by "size - 8" bytes of
+ * the actual signed data
+ */
+struct TALER_RSA_SignaturePurpose
+{
+ /**
+ * How many bytes does this signature sign?
+ * (including this purpose header); in network
+ * byte order (!).
+ */
+ uint32_t size GNUNET_PACKED;
+
+ /**
+ * What does this signature vouch for? This
+ * must contain a GNUNET_SIGNATURE_PURPOSE_XXX
+ * constant (from gnunet_signatures.h). In
+ * network byte order!
+ */
+ uint32_t purpose GNUNET_PACKED;
+
+};
+
+
+struct TALER_RSA_BlindedSignaturePurpose
+{
+ unsigned char data[TALER_RSA_DATA_ENCODING_LENGTH];
+};
+
+
+/**
+ * @brief A public key.
+ */
+struct TALER_RSA_PublicKeyBinaryEncoded
+{
+ /**
+ * In big-endian, must be GNUNET_CRYPTO_RSA_KEY_LENGTH+4
+ */
+ uint16_t len GNUNET_PACKED;
+
+ /**
+ * Size of n in key; in big-endian!
+ */
+ uint16_t sizen GNUNET_PACKED;
+
+ /**
+ * The key itself, contains n followed by e.
+ */
+ unsigned char key[TALER_RSA_KEY_LENGTH];
+
+ /**
+ * Padding (must be 0)
+ */
+ uint16_t padding GNUNET_PACKED;
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+/**
+ * Create a new private key. Caller must free return value.
+ *
+ * @return fresh private key
+ */
+struct TALER_RSA_PrivateKey *
+TALER_RSA_key_create ();
+
+
+/**
+ * Free memory occupied by the private key.
+ *
+ * @param key pointer to the memory to free
+ */
+void
+TALER_RSA_key_free (struct TALER_RSA_PrivateKey *key);
+
+
+/**
+ * Encode the private key in a format suitable for
+ * storing it into a file.
+ * @return encoding of the private key
+ */
+struct TALER_RSA_PrivateKeyBinaryEncoded *
+TALER_RSA_encode_key (const struct TALER_RSA_PrivateKey *hostkey);
+
+
+/**
+ * Extract the public key of the given private key.
+ *
+ * @param priv the private key
+ * @param pub where to write the public key
+ */
+void
+TALER_RSA_key_get_public (const struct TALER_RSA_PrivateKey *priv,
+ struct TALER_RSA_PublicKeyBinaryEncoded *pub);
+
+
+/**
+ * Decode the private key from the data-format back
+ * to the "normal", internal format.
+ *
+ * @param buf the buffer where the private key data is stored
+ * @param len the length of the data in 'buffer'
+ * @return NULL on error
+ */
+struct TALER_RSA_PrivateKey *
+TALER_RSA_decode_key (const char *buf, uint16_t len);
+
+
+/**
+ * Convert a public key to a string.
+ *
+ * @param pub key to convert
+ * @return string representing 'pub'
+ */
+char *
+TALER_RSA_public_key_to_string (const struct TALER_RSA_PublicKeyBinaryEncoded *pub);
+
+
+/**
+ * Convert a string representing a public key to a public key.
+ *
+ * @param enc encoded public key
+ * @param enclen number of bytes in enc (without 0-terminator)
+ * @param pub where to store the public key
+ * @return GNUNET_OK on success
+ */
+int
+TALER_RSA_public_key_from_string (const char *enc,
+ size_t enclen,
+ struct TALER_RSA_PublicKeyBinaryEncoded *pub);
+
+
+/**
+ * Sign a given block.h
+ *
+ * @param key private key to use for the signing
+ * @param msg the message
+ * @param size the size of the message
+ * @param sig where to write the signature
+ * @return GNUNET_SYSERR on error, GNUNET_OK on success
+ */
+int
+TALER_RSA_sign (const struct TALER_RSA_PrivateKey *key,
+ const void *msg,
+ size_t size,
+ struct TALER_RSA_Signature *sig);
+
+
+/**
+ * Verify signature with the given hash.
+ *
+ * @param hash the hash code to verify against the signature
+ * @param sig signature that is being validated
+ * @param publicKey public key of the signer
+ * @returns GNUNET_OK if ok, GNUNET_SYSERR if invalid
+ */
+int
+TALER_RSA_hash_verify (const struct GNUNET_HashCode *hash,
+ const struct TALER_RSA_Signature *sig,
+ const struct TALER_RSA_PublicKeyBinaryEncoded *publicKey);
+
+
+/**
+ * Verify signature on the given message
+ *
+ * @param msg the message
+ * @param size the size of the message
+ * @param sig signature that is being validated
+ * @param publicKey public key of the signer
+ * @returns GNUNET_OK if ok, GNUNET_SYSERR if invalid
+ */
+int
+TALER_RSA_verify (const void *msg, size_t size,
+ const struct TALER_RSA_Signature *sig,
+ const struct TALER_RSA_PublicKeyBinaryEncoded *publicKey);
+
+/**
+ * Key used to blind a message
+ */
+struct TALER_RSA_BlindingKey;
+
+/**
+ * Create a blinding key
+ *
+ * @return the newly created blinding key
+ */
+struct TALER_RSA_BlindingKey *
+TALER_RSA_blinding_key_create ();
+
+
+/**
+ * Destroy a blinding key
+ *
+ * @param bkey the blinding key to destroy
+ */
+void
+TALER_RSA_blinding_key_destroy (struct TALER_RSA_BlindingKey *bkey);
+
+
+/**
+ * Binary encoding for TALER_RSA_BlindingKey
+ */
+struct TALER_RSA_BlindingKeyBinaryEncoded
+{
+ unsigned char data[TALER_RSA_DATA_ENCODING_LENGTH];
+};
+
+
+/**
+ * Encode a blinding key
+ *
+ * @param bkey the blinding key to encode
+ * @param bkey_enc where to store the encoded binary key
+ * @return #GNUNET_OK upon successful encoding; #GNUNET_SYSERR upon failure
+ */
+int
+TALER_RSA_blinding_key_encode (struct TALER_RSA_BlindingKey *bkey,
+ struct TALER_RSA_BlindingKeyBinaryEncoded *bkey_enc);
+
+
+/**
+ * Decode a blinding key from its encoded form
+ *
+ * @param bkey_enc the encoded blinding key
+ * @return the decoded blinding key; NULL upon error
+ */
+struct TALER_RSA_BlindingKey *
+TALER_RSA_blinding_key_decode (struct TALER_RSA_BlindingKeyBinaryEncoded *bkey_enc);
+
+
+/**
+ * Blinds the given message with the given blinding key
+ *
+ * @param msg the message
+ * @param size the size of the message
+ * @param bkey the blinding key
+ * @param pkey the public key of the signer
+ * @return the blinding signature purpose; NULL upon any error
+ */
+struct TALER_RSA_BlindedSignaturePurpose *
+TALER_RSA_message_blind (const void *msg, size_t size,
+ struct TALER_RSA_BlindingKey *bkey,
+ struct TALER_RSA_PublicKeyBinaryEncoded *pkey);
+
+
+/**
+ * Unblind a signature made on blinding signature purpose. The signature
+ * purpose should have been generated with TALER_RSA_message_blind() function.
+ *
+ * @param sig the signature made on the blinded signature purpose
+ * @param bkey the blinding key used to blind the signature purpose
+ * @param pkey the public key of the signer
+ * @return GNUNET_SYSERR upon error; GNUNET_OK upon success.
+ */
+int
+TALER_RSA_unblind (struct TALER_RSA_Signature *sig,
+ struct TALER_RSA_BlindingKey *bkey,
+ struct TALER_RSA_PublicKeyBinaryEncoded *pkey);
+
+#endif /* TALER_RSA_H */
+
+/* end of include/taler_rsa.h */
diff --git a/src/include/taler_signatures.h b/src/include/taler_signatures.h
new file mode 100644
index 00000000..8c142f61
--- /dev/null
+++ b/src/include/taler_signatures.h
@@ -0,0 +1,106 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file taler-mint-keyup.c
+ * @brief Update the mint's keys for coins and signatures,
+ * using the mint's offline master key.
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ */
+
+#ifndef TALER_SIGNATURES_H
+#define TALER_SIGNATURES_H
+
+/**
+ * Purpose for signing public keys signed
+ * by the mint master key.
+ */
+#define TALER_SIGNATURE_MASTER_SIGNKEY 1
+
+/**
+ * Purpose for denomination keys signed
+ * by the mint master key.
+ */
+#define TALER_SIGNATURE_MASTER_DENOM 2
+
+/**
+ * Purpose for the state of a reserve,
+ * signed by the mint's signing key.
+ */
+#define TALER_SIGNATURE_RESERVE_STATUS 3
+
+/**
+ * Signature where the reserve key
+ * confirms a withdraw request.
+ */
+#define TALER_SIGNATURE_WITHDRAW 4
+
+/**
+ * Signature where the refresh session confirms
+ * the list of melted coins and requested denominations.
+ */
+#define TALER_SIGNATURE_REFRESH_MELT 5
+
+/**
+ * Signature where the refresh session confirms
+ * the commits.
+ */
+#define TALER_SIGNATURE_REFRESH_COMMIT 6
+
+/**
+ * Signature where the mint (current signing key)
+ * confirms the list of blind session keys.
+ */
+#define TALER_SIGNATURE_REFRESH_MELT_RESPONSE 7
+
+/**
+ * Signature where the mint (current signing key)
+ * confirms the no-reveal index for cut-and-choose.
+ */
+#define TALER_SIGNATURE_REFRESH_COMMIT_RESPONSE 8
+
+/**
+ * Signature where coins confirm that they want
+ * to be melted into a certain session.
+ */
+#define TALER_SIGNATURE_REFRESH_MELT_CONFIRM 9
+
+/***********************/
+/* Merchant signatures */
+/***********************/
+
+/**
+ * Signature where the merchant confirms a contract
+ */
+#define TALER_SIGNATURE_MERCHANT_CONTRACT 101
+
+/*********************/
+/* Wallet signatures */
+/*********************/
+
+/**
+ * Signature made by the wallet of a user to confirm a deposit permission
+ */
+#define TALER_SIGNATURE_DEPOSIT 201
+
+/**
+ * Signature made by the wallet of a user to confirm a incremental deposit permission
+ */
+#define TALER_SIGNATURE_INCREMENTAL_DEPOSIT 202
+
+#endif
+
diff --git a/src/include/taler_types.h b/src/include/taler_types.h
new file mode 100644
index 00000000..c6c2c020
--- /dev/null
+++ b/src/include/taler_types.h
@@ -0,0 +1,120 @@
+/**
+ * @file include/types.h
+ * @brief This files defines the various data and message types in TALER.
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ * @author Florian Dold
+ */
+
+#ifndef TYPES_H_
+#define TYPES_H_
+
+#include "taler_rsa.h"
+
+
+/**
+ * Public information about a coin.
+ */
+struct TALER_CoinPublicInfo
+{
+ /**
+ * The coin's public key.
+ */
+ struct GNUNET_CRYPTO_EcdsaPublicKey coin_pub;
+
+ /*
+ * The public key signifying the coin's denomination.
+ */
+ struct TALER_RSA_PublicKeyBinaryEncoded denom_pub;
+
+ /**
+ * Signature over coin_pub by denom_pub.
+ */
+ struct TALER_RSA_Signature denom_sig;
+};
+
+
+/**
+ * Request to withdraw coins from a reserve.
+ */
+struct TALER_WithdrawRequest
+{
+ /**
+ * Signature over the rest of the message
+ * by the withdraw public key.
+ */
+ struct GNUNET_CRYPTO_EddsaSignature sig;
+
+ /**
+ * Purpose must be TALER_SIGNATURE_WITHDRAW.
+ */
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+
+ /**
+ * Reserve public key.
+ */
+ struct GNUNET_CRYPTO_EddsaPublicKey reserve_pub;
+
+ /**
+ * Denomination public key for the coin that is withdrawn.
+ */
+ struct TALER_RSA_PublicKeyBinaryEncoded denomination_pub;
+
+ /**
+ * Purpose containing coin's blinded public key.
+ */
+ struct TALER_RSA_BlindedSignaturePurpose coin_envelope;
+};
+
+
+
+/**
+ * Data type for messages
+ */
+struct TALER_MessageHeader
+{
+ /**
+ * The type of the message in Network-byte order (NBO)
+ */
+ uint16_t type;
+
+ /**
+ * The size of the message in NBO
+ */
+ uint16_t size;
+};
+
+/*****************/
+/* Message types */
+/*****************/
+
+/**
+ * The message type of a blind signature
+ */
+#define TALER_MSG_TYPE_BLINDED_SIGNATURE 1
+
+/**
+ * The message type of a blinded message
+ */
+#define TALER_MSG_TYPE_BLINDED_MESSAGE 2
+
+/**
+ * The message type of an unblinded signature
+ * @FIXME: Not currently used
+ */
+#define TALER_MSG_TYPE_UNBLINDED_SIGNATURE 3
+
+/**
+ * The type of a blinding residue message
+ * @FIXME: Not currently used
+ */
+#define TALER_MSG_TYPE_BLINDING_RESIDUE 4
+
+/**
+ * The type of a message containing the blinding factor
+ */
+#define TALER_MSG_TYPE_BLINDING_FACTOR 5
+
+
+#endif /* TYPES_H_ */
+
+/* end of include/types.h */
diff --git a/src/include/taler_util.h b/src/include/taler_util.h
new file mode 100644
index 00000000..a8a7c201
--- /dev/null
+++ b/src/include/taler_util.h
@@ -0,0 +1,255 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file include/taler_util.h
+ * @brief Interface for common utility functions
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ */
+
+#ifndef UTIL_H_
+#define UTIL_H_
+
+#include <gnunet/gnunet_util_lib.h>
+#include <gcrypt.h>
+
+/* Define logging functions */
+#define LOG_DEBUG(...) \
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
+
+#define LOG_WARNING(...) \
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, __VA_ARGS__)
+
+#define LOG_ERROR(...) \
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, __VA_ARGS__)
+
+
+/**
+ * Tests a given as assertion and if failed prints it as a warning with the
+ * given reason
+ *
+ * @param EXP the expression to test as assertion
+ * @param reason string to print as warning
+ */
+#define TALER_assert_as(EXP, reason) \
+ do { \
+ if (EXP) break; \
+ LOG_ERROR("%s at %s:%d\n", reason, __FILE__, __LINE__); \
+ abort(); \
+ } while(0)
+
+
+
+/**
+ * Log an error message at log-level 'level' that indicates
+ * a failure of the command 'cmd' with the message given
+ * by gcry_strerror(rc).
+ */
+#define LOG_GCRY_ERROR(cmd, rc) do { LOG_ERROR("`%s' failed at %s:%d with error: %s\n", cmd, __FILE__, __LINE__, gcry_strerror(rc)); } while(0)
+
+
+#define TALER_gcry_ok(cmd) \
+ do {int rc; rc = cmd; if (!rc) break; LOG_ERROR("A Gcrypt call failed at %s:%d with error: %s\n", __FILE__, __LINE__, gcry_strerror(rc)); abort(); } while (0)
+
+
+#define TALER_CURRENCY_LEN 4
+
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+struct TALER_AmountNBO
+{
+ uint32_t value;
+ uint32_t fraction;
+ char currency[TALER_CURRENCY_LEN];
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+struct TALER_HashContext
+{
+ gcry_md_hd_t hd;
+};
+
+
+
+/**
+ * Representation of monetary value in a given currency.
+ */
+struct TALER_Amount
+{
+ /**
+ * Value (numerator of fraction)
+ */
+ uint32_t value;
+ /**
+ * Fraction (denominator of fraction)
+ */
+ uint32_t fraction;
+ /**
+ * Currency string, left adjusted and padded with zeros.
+ */
+ char currency[4];
+};
+
+
+/**
+ * Initialize Gcrypt library.
+ */
+void
+TALER_gcrypt_init();
+
+
+/**
+ * Generate a ECC private key.
+ *
+ * @return the s-expression representing the generated ECC private key; NULL
+ * upon error
+ */
+gcry_sexp_t
+TALER_genkey ();
+
+
+/**
+ * Parse denomination description, in the format "T : V : F".
+ *
+ * @param str denomination description
+ * @param denom denomination to write the result to
+ * @return GNUNET_OK if the string is a valid denomination specification,
+ * GNUNET_SYSERR if it is invalid.
+ */
+int
+TALER_string_to_amount (const char *str, struct TALER_Amount *denom);
+
+
+/**
+ * FIXME
+ */
+struct TALER_AmountNBO
+TALER_amount_hton (struct TALER_Amount d);
+
+
+/**
+ * FIXME
+ */
+struct TALER_Amount
+TALER_amount_ntoh (struct TALER_AmountNBO dn);
+
+/**
+ * Compare the value/fraction of two amounts. Does not compare the currency,
+ * i.e. comparing amounts with the same value and fraction but different
+ * currency would return 0.
+ *
+ * @param a1 first amount
+ * @param a2 second amount
+ * @return result of the comparison
+ */
+int
+TALER_amount_cmp (struct TALER_Amount a1, struct TALER_Amount a2);
+
+
+/**
+ * Perform saturating subtraction of amounts.
+ *
+ * @param a1 amount to subtract from
+ * @param a2 amount to subtract
+ * @return (a1-a2) or 0 if a2>=a1
+ */
+struct TALER_Amount
+TALER_amount_subtract (struct TALER_Amount a1, struct TALER_Amount a2);
+
+
+/**
+ * Perform saturating addition of amounts
+ *
+ * @param a1 first amount to add
+ * @param a2 second amount to add
+ * @return sum of a1 and a2
+ */
+struct TALER_Amount
+TALER_amount_add (struct TALER_Amount a1, struct TALER_Amount a2);
+
+
+/**
+ * Normalize the given amount.
+ *
+ * @param amout amount to normalize
+ * @return normalized amount
+ */
+struct TALER_Amount
+TALER_amount_normalize (struct TALER_Amount amount);
+
+
+/**
+ * Convert amount to string.
+ *
+ * @param amount amount to convert to string
+ * @return freshly allocated string representation
+ */
+char *
+TALER_amount_to_string (struct TALER_Amount amount);
+
+
+/**
+ * Return the base32crockford encoding of the given buffer.
+ *
+ * The returned string will be freshly allocated, and must be free'd
+ * with GNUNET_free.
+ *
+ * @param buffer with data
+ * @param size size of the buffer
+ * @return freshly allocated, null-terminated string
+ */
+char *
+TALER_data_to_string_alloc (const void *buf, size_t size);
+
+
+/**
+ * Get encoded binary data from a configuration.
+ *
+ * @return GNUNET_OK on success
+ * GNUNET_NO is the value does not exist
+ * GNUNET_SYSERR on encoding error
+ */
+int
+TALER_configuration_get_data (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section, const char *option,
+ void *buf, size_t buf_size);
+
+
+
+
+int
+TALER_refresh_decrypt (const void *input, size_t input_size, const struct GNUNET_HashCode *secret, void *result);
+
+int
+TALER_refresh_encrypt (const void *input, size_t input_size, const struct GNUNET_HashCode *secret, void *result);
+
+
+
+void
+TALER_hash_context_start (struct TALER_HashContext *hc);
+
+
+void
+TALER_hash_context_read (struct TALER_HashContext *hc, void *buf, size_t size);
+
+
+void
+TALER_hash_context_finish (struct TALER_HashContext *hc,
+ struct GNUNET_HashCode *r_hash);
+
+#endif
diff --git a/src/mint/.gitignore b/src/mint/.gitignore
new file mode 100644
index 00000000..a2e71d5d
--- /dev/null
+++ b/src/mint/.gitignore
@@ -0,0 +1,6 @@
+taler-mint-dbinit
+taler-mint-keycheck
+taler-mint-keyup
+taler-mint-pursemod
+taler-mint-reservemod
+taler-mint-httpd \ No newline at end of file
diff --git a/src/mint/Makefile.am b/src/mint/Makefile.am
new file mode 100644
index 00000000..2ae15348
--- /dev/null
+++ b/src/mint/Makefile.am
@@ -0,0 +1,131 @@
+AM_CPPFLAGS = -I$(top_srcdir)/src/include $(POSTGRESQL_CPPFLAGS)
+
+lib_LTLIBRARIES = \
+ libtalermint.la \
+ libtalermintapi.la
+
+libtalermint_la_SOURCES = \
+ mint_common.c \
+ mint_db.c
+
+libtalermint_la_LIBADD = \
+ $(top_builddir)/src/util/libtalerutil.la \
+ -lgnunetutil \
+ -lpq
+
+libtalermint_la_LDFLAGS = \
+ $(POSTGRESQL_LDFLAGS) \
+ -version-info 0:0:0 \
+ -no-undefined
+
+libtalermintapi_la_SOURCES = \
+ mint_api.c
+
+libtalermintapi_la_LIBADD = \
+ -lgnunetutil \
+ -ljansson \
+ -lcurl
+
+libtalermintapi_la_LDFLAGS = \
+ -version-info 0:0:0 \
+ -no-undefined
+
+
+bin_PROGRAMS = \
+ taler-mint-keyup \
+ taler-mint-keycheck \
+ taler-mint-reservemod \
+ taler-mint-httpd \
+ taler-mint-dbinit
+
+taler_mint_keyup_SOURCES = \
+ taler-mint-keyup.c
+
+taler_mint_keyup_LDADD = \
+ $(LIBGCRYPT_LIBS) \
+ $(top_builddir)/src/util/libtalerutil.la \
+ $(top_builddir)/src/mint/libtalermint.la \
+ -lpq \
+ -lgnunetutil
+taler_mint_keyup_LDFLAGS = $(POSTGRESQL_LDFLAGS)
+
+
+taler_mint_keycheck_SOURCES = \
+ taler-mint-keycheck.c
+
+taler_mint_keycheck_LDADD = \
+ $(LIBGCRYPT_LIBS) \
+ $(top_builddir)/src/util/libtalerutil.la \
+ $(top_builddir)/src/mint/libtalermint.la \
+ -lgnunetutil \
+ -lpq
+taler_mint_keycheck_LDFLAGS = $(POSTGRESQL_LDFLAGS)
+
+taler_mint_reservemod_SOURCES = \
+ taler-mint-reservemod.c
+taler_mint_reservemod_LDADD = \
+ $(LIBGCRYPT_LIBS) \
+ $(top_builddir)/src/util/libtalerutil.la \
+ $(top_builddir)/src/mint/libtalermint.la \
+ -lpq \
+ -lgnunetutil
+taler_mint_reservemod_LDFLAGS = \
+ $(POSTGRESQL_LDFLAGS)
+
+taler_mint_httpd_SOURCES = \
+ taler-mint-httpd.c \
+ taler-mint-httpd_mhd.c \
+ taler-mint-httpd_keys.c \
+ taler-mint-httpd_deposit.c \
+ taler-mint-httpd_withdraw.c \
+ taler-mint-httpd_refresh.c
+taler_mint_httpd_LDADD = \
+ $(LIBGCRYPT_LIBS) \
+ $(top_builddir)/src/util/libtalerutil.la \
+ $(top_builddir)/src/mint/libtalermint.la \
+ -lpq \
+ -lmicrohttpd \
+ -ljansson \
+ -lgnunetutil \
+ -lpthread
+taler_mint_httpd_LDFLAGS = \
+ $(POSTGRESQL_LDFLAGS)
+
+
+taler_mint_dbinit_SOURCES = \
+ taler-mint-dbinit.c
+taler_mint_dbinit_LDADD = \
+ $(LIBGCRYPT_LIBS) \
+ $(top_builddir)/src/util/libtalerutil.la \
+ $(top_builddir)/src/mint/libtalermint.la \
+ -lpq \
+ -lgnunetutil
+taler_mint_dbinit_LDFLAGS = $(POSTGRESQL_LDFLAGS)
+
+check_PROGRAMS = \
+ test-mint-api \
+ test-mint-deposits \
+ test-mint-common
+
+test_mint_api_SOURCES = test_mint_api.c
+test_mint_api_LDADD = \
+ libtalermintapi.la \
+ $(LIBGCRYPT_LIBS) \
+ $(top_builddir)/src/util/libtalerutil.la \
+ -lgnunetutil \
+ -ljansson
+
+test_mint_deposits_SOURCES = \
+ test_mint_deposits.c
+test_mint_deposits_LDADD = \
+ libtalermint.la \
+ $(top_srcdir)/src/util/libtalerutil.la \
+ -lgnunetutil \
+ -lpq
+
+test_mint_common_SOURCES = \
+ test_mint_common.c
+test_mint_common_LDADD = \
+ libtalermint.la \
+ $(top_srcdir)/src/util/libtalerutil.la \
+ -lgnunetutil
diff --git a/src/mint/mint.h b/src/mint/mint.h
new file mode 100644
index 00000000..5adce03c
--- /dev/null
+++ b/src/mint/mint.h
@@ -0,0 +1,198 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file taler_mint.h
+ * @brief Common functionality for the mint
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ */
+
+#ifndef _MINT_H
+#define _MINT_H
+
+#include <gnunet/gnunet_util_lib.h>
+#include <gnunet/gnunet_common.h>
+#include <libpq-fe.h>
+#include "taler_util.h"
+#include "taler_rsa.h"
+
+#define DIR_SIGNKEYS "signkeys"
+#define DIR_DENOMKEYS "denomkeys"
+
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+
+/**
+ * FIXME
+ */
+struct TALER_MINT_SignKeyIssue
+{
+ struct GNUNET_CRYPTO_EddsaPrivateKey signkey_priv;
+ struct GNUNET_CRYPTO_EddsaSignature signature;
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+ struct GNUNET_CRYPTO_EddsaPublicKey master_pub;
+ struct GNUNET_TIME_AbsoluteNBO start;
+ struct GNUNET_TIME_AbsoluteNBO expire;
+ struct GNUNET_CRYPTO_EddsaPublicKey signkey_pub;
+};
+
+struct TALER_MINT_DenomKeyIssue
+{
+ /**
+ * The private key of the denomination. Will be NULL if the private key is
+ * not available.
+ */
+ struct TALER_RSA_PrivateKey *denom_priv;
+ struct GNUNET_CRYPTO_EddsaSignature signature;
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+ struct GNUNET_CRYPTO_EddsaPublicKey master;
+ struct GNUNET_TIME_AbsoluteNBO start;
+ struct GNUNET_TIME_AbsoluteNBO expire_withdraw;
+ struct GNUNET_TIME_AbsoluteNBO expire_spend;
+ struct TALER_RSA_PublicKeyBinaryEncoded denom_pub;
+ struct TALER_AmountNBO value;
+ struct TALER_AmountNBO fee_withdraw;
+ struct TALER_AmountNBO fee_deposit;
+ struct TALER_AmountNBO fee_refresh;
+};
+
+struct RefreshMeltSignatureBody
+{
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+ struct GNUNET_HashCode melt_hash;
+};
+
+struct RefreshCommitSignatureBody
+{
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+ struct GNUNET_HashCode commit_hash;
+};
+
+struct RefreshCommitResponseSignatureBody
+{
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+ uint16_t noreveal_index;
+};
+
+struct RefreshMeltResponseSignatureBody
+{
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+ struct GNUNET_HashCode melt_response_hash;
+};
+
+
+struct RefreshMeltConfirmSignRequestBody
+{
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+ struct GNUNET_CRYPTO_EddsaPublicKey session_pub;
+};
+
+
+GNUNET_NETWORK_STRUCT_END
+
+
+
+/**
+ * Iterator for sign keys.
+ *
+ * @param cls closure
+ * @param ski the sign key issue
+ * @return #GNUNET_OK to continue to iterate,
+ * #GNUNET_NO to stop iteration with no error,
+ * #GNUNET_SYSERR to abort iteration with error!
+ */
+typedef int (*TALER_MINT_SignkeyIterator)(void *cls,
+ const struct TALER_MINT_SignKeyIssue *ski);
+
+/**
+ * Iterator for denomination keys.
+ *
+ * @param cls closure
+ * @param dki the denomination key issue
+ * @param alias coin alias
+ * @return #GNUNET_OK to continue to iterate,
+ * #GNUNET_NO to stop iteration with no error,
+ * #GNUNET_SYSERR to abort iteration with error!
+ */
+typedef int (*TALER_MINT_DenomkeyIterator)(void *cls,
+ const char *alias,
+ const struct TALER_MINT_DenomKeyIssue *dki);
+
+
+
+/**
+ * FIXME
+ */
+int
+TALER_MINT_signkeys_iterate (const char *mint_base_dir,
+ TALER_MINT_SignkeyIterator it, void *cls);
+
+
+/**
+ * FIXME
+ */
+int
+TALER_MINT_denomkeys_iterate (const char *mint_base_dir,
+ TALER_MINT_DenomkeyIterator it, void *cls);
+
+
+/**
+ * Exports a denomination key to the given file
+ *
+ * @param filename the file where to write the denomination key
+ * @param dki the denomination key
+ * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure.
+ */
+int
+TALER_MINT_write_denom_key (const char *filename,
+ const struct TALER_MINT_DenomKeyIssue *dki);
+
+
+/**
+ * Import a denomination key from the given file
+ *
+ * @param filename the file to import the key from
+ * @param dki pointer to return the imported denomination key
+ * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
+ */
+int
+TALER_MINT_read_denom_key (const char *filename,
+ struct TALER_MINT_DenomKeyIssue *dki);
+
+
+/**
+ * Load the configuration for the mint in the given
+ * directory.
+ *
+ * @param mint_base_dir the mint's base directory
+ * @return the mint configuratin, or NULL on error
+ */
+struct GNUNET_CONFIGURATION_Handle *
+TALER_MINT_config_load (const char *mint_base_dir);
+
+
+int
+TALER_TALER_DB_extract_amount (PGresult *result, unsigned int row,
+ int indices[3], struct TALER_Amount *denom);
+
+int
+TALER_TALER_DB_extract_amount_nbo (PGresult *result, unsigned int row,
+ int indices[3], struct TALER_AmountNBO *denom_nbo);
+
+#endif /* _MINT_H */
+
diff --git a/src/mint/mint_api.c b/src/mint/mint_api.c
new file mode 100644
index 00000000..b8d42b27
--- /dev/null
+++ b/src/mint/mint_api.c
@@ -0,0 +1,1121 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see
+ <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file mint/mint_api.c
+ * @brief Implementation of the client interface to mint's HTTP API
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ */
+
+#include "platform.h"
+#include <curl/curl.h>
+#include <jansson.h>
+#include <gnunet/gnunet_util_lib.h>
+#include "taler_mint_service.h"
+#include "taler_signatures.h"
+#include "mint.h"
+
+#define CURL_STRERROR(TYPE, FUNCTION, CODE) \
+ GNUNET_log (TYPE, "cURL function `%s' has failed at `%s:%d' with error: %s", \
+ FUNCTION, __FILE__, __LINE__, curl_easy_strerror (CODE));
+
+
+
+/**
+ * Print JSON parsing related error information
+ */
+#define JSON_WARN(error) \
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, \
+ "JSON parsing failed at %s:%u: %s (%s)", \
+ __FILE__, __LINE__, error.text, error.source)
+
+/**
+ * Failsafe flag
+ */
+static int fail;
+
+/**
+ * Context
+ */
+struct TALER_MINT_Context
+{
+ /**
+ * CURL multi handle
+ */
+ CURLM *multi;
+
+ /**
+ * CURL share handle
+ */
+ CURLSH *share;
+
+ /**
+ * Perform task handle
+ */
+ struct GNUNET_SCHEDULER_Task *perform_task;
+};
+
+/**
+ * Type of requests we currently have
+ */
+enum RequestType
+{
+ /**
+ * No request
+ */
+ REQUEST_TYPE_NONE,
+
+ /**
+ * Current request is to receive mint's keys
+ */
+ REQUEST_TYPE_KEYSGET,
+
+ /**
+ * Current request is to submit a deposit permission and get its status
+ */
+ REQUEST_TYPE_DEPOSIT
+};
+
+
+/**
+ * Handle to the mint
+ */
+struct TALER_MINT_Handle
+{
+ /**
+ * The context of this handle
+ */
+ struct TALER_MINT_Context *ctx;
+
+ /**
+ * The hostname of the mint
+ */
+ char *hostname;
+
+ /**
+ * The CURL handle
+ */
+ CURL *curl;
+
+ /**
+ * Error buffer for CURL
+ */
+ char emsg[CURL_ERROR_SIZE];
+
+ /**
+ * Download buffer
+ */
+ void *buf;
+
+ /**
+ * The currently active request
+ */
+ union {
+ /**
+ * Used to denote no request if set to NULL
+ */
+ void *none;
+
+ /**
+ * Denom keys get request if REQUEST_TYPE_KEYSGET
+ */
+ struct TALER_MINT_KeysGetHandle *keys_get;
+
+ /**
+ * Deposit request if REQUEST_TYPE_DEPOSIT
+ */
+ struct TALER_MINT_DepositHandle *deposit;
+ } req;
+
+ /**
+ * The size of the download buffer
+ */
+ size_t buf_size;
+
+ /**
+ * Active request type
+ */
+ enum RequestType req_type;
+
+ /**
+ * The service port of the mint
+ */
+ uint16_t port;
+
+ /**
+ * Are we connected to the mint?
+ */
+ uint8_t connected;
+
+};
+
+
+/**
+ * A handle to get the keys of a mint
+ */
+struct TALER_MINT_KeysGetHandle
+{
+ /**
+ * The connection to mint this request handle will use
+ */
+ struct TALER_MINT_Handle *mint;
+
+ /**
+ * The url for this handle
+ */
+ char *url;
+
+ TALER_MINT_KeysGetCallback cb;
+ void *cls;
+
+ TALER_MINT_ContinuationCallback cont_cb;
+ void *cont_cls;
+};
+
+
+/**
+ * A handle to submit a deposit permission and get its status
+ */
+struct TALER_MINT_DepositHandle
+{
+ /**
+ *The connection to mint this request handle will use
+ */
+ struct TALER_MINT_Handle *mint;
+
+ /**
+ * The url for this handle
+ */
+ char *url;
+
+ TALER_MINT_DepositResultCallback cb;
+ void *cls;
+
+ char *json_enc;
+
+ struct curl_slist *headers;
+
+};
+
+
+/**
+ * Parses the timestamp encoded as ASCII string as UNIX timstamp.
+ *
+ * @param abs successfully parsed timestamp will be returned thru this parameter
+ * @param tstamp_enc the ASCII encoding of the timestamp
+ * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
+ */
+static int
+parse_timestamp (struct GNUNET_TIME_Absolute *abs, const char *tstamp_enc)
+{
+ unsigned long tstamp;
+
+ if (1 != sscanf (tstamp_enc, "%lu", &tstamp))
+ return GNUNET_SYSERR;
+ *abs = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get_zero_ (),
+ GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_SECONDS, tstamp));
+ return GNUNET_OK;
+}
+
+
+#define EXITIF(cond) \
+ do { \
+ if (cond) { GNUNET_break (0); goto EXITIF_exit; } \
+ } while (0)
+
+
+
+static int
+parse_json_signkey (struct TALER_MINT_SigningPublicKey **_sign_key,
+ json_t *sign_key_obj,
+ struct GNUNET_CRYPTO_EddsaPublicKey *master_key)
+{
+ json_t *valid_from_obj;
+ json_t *valid_until_obj;
+ json_t *key_obj;
+ json_t *sig_obj;
+ const char *valid_from_enc;
+ const char *valid_until_enc;
+ const char *key_enc;
+ const char *sig_enc;
+ struct TALER_MINT_SigningPublicKey *sign_key;
+ struct TALER_MINT_SignKeyIssue sign_key_issue;
+ struct GNUNET_CRYPTO_EddsaSignature sig;
+ struct GNUNET_TIME_Absolute valid_from;
+ struct GNUNET_TIME_Absolute valid_until;
+
+ EXITIF (JSON_OBJECT != json_typeof (sign_key_obj));
+ EXITIF (NULL == (valid_from_obj = json_object_get (sign_key_obj,
+ "stamp_start")));
+ EXITIF (NULL == (valid_until_obj = json_object_get (sign_key_obj,
+ "stamp_expire")));
+ EXITIF (NULL == (key_obj = json_object_get (sign_key_obj, "key")));
+ EXITIF (NULL == (sig_obj = json_object_get (sign_key_obj, "master_sig")));
+ EXITIF (NULL == (valid_from_enc = json_string_value (valid_from_obj)));
+ EXITIF (NULL == (valid_until_enc = json_string_value (valid_until_obj)));
+ EXITIF (NULL == (key_enc = json_string_value (key_obj)));
+ EXITIF (NULL == (sig_enc = json_string_value (sig_obj)));
+ EXITIF (GNUNET_SYSERR == parse_timestamp (&valid_from,
+ valid_from_enc));
+ EXITIF (GNUNET_SYSERR == parse_timestamp (&valid_until,
+ valid_until_enc));
+ EXITIF (52 != strlen (key_enc)); /* strlen(base32(char[32])) = 52 */
+ EXITIF (103 != strlen (sig_enc)); /* strlen(base32(char[64])) = 103 */
+ EXITIF (GNUNET_OK != GNUNET_STRINGS_string_to_data (sig_enc, 103,
+ &sig, sizeof (sig)));
+ (void) memset (&sign_key_issue, 0, sizeof (sign_key_issue));
+ EXITIF (GNUNET_SYSERR ==
+ GNUNET_CRYPTO_eddsa_public_key_from_string (key_enc,
+ 52,
+ &sign_key_issue.signkey_pub));
+ sign_key_issue.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_SIGNKEY);
+ sign_key_issue.purpose.size =
+ htonl (sizeof (sign_key_issue)
+ - offsetof (struct TALER_MINT_SignKeyIssue, purpose));
+ sign_key_issue.master_pub = *master_key;
+ sign_key_issue.start = GNUNET_TIME_absolute_hton (valid_from);
+ sign_key_issue.expire = GNUNET_TIME_absolute_hton (valid_until);
+ EXITIF (GNUNET_OK !=
+ GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_SIGNKEY,
+ &sign_key_issue.purpose,
+ &sig,
+ master_key));
+ sign_key = GNUNET_new (struct TALER_MINT_SigningPublicKey);
+ sign_key->valid_from = valid_from;
+ sign_key->valid_until = valid_until;
+ sign_key->key = sign_key_issue.signkey_pub;
+ *_sign_key = sign_key;
+ return GNUNET_OK;
+
+ EXITIF_exit:
+ return GNUNET_SYSERR;
+}
+
+
+static int
+parse_json_amount (json_t *amount_obj, struct TALER_Amount *amt)
+{
+ json_t *obj;
+ const char *currency_str;
+ int value;
+ int fraction;
+
+ EXITIF (NULL == (obj = json_object_get (amount_obj, "currency")));
+ EXITIF (NULL == (currency_str = json_string_value (obj)));
+ EXITIF (NULL == (obj = json_object_get (amount_obj, "value")));
+ EXITIF (JSON_INTEGER != json_typeof (obj));
+ EXITIF (0 > (value = json_integer_value (obj)));
+ EXITIF (NULL == (obj = json_object_get (amount_obj, "fraction")));
+ EXITIF (JSON_INTEGER != json_typeof (obj));
+ EXITIF (0 > (fraction = json_integer_value (obj)));
+ (void) memset (amt->currency, 0, sizeof (amt->currency));
+ (void) strncpy (amt->currency, currency_str, sizeof (amt->currency) - 1);
+ amt->value = (uint32_t) value;
+ amt->fraction = (uint32_t) fraction;
+ return GNUNET_OK;
+
+ EXITIF_exit:
+ return GNUNET_SYSERR;
+}
+
+static int
+parse_json_denomkey (struct TALER_MINT_DenomPublicKey **_denom_key,
+ json_t *denom_key_obj,
+ struct GNUNET_CRYPTO_EddsaPublicKey *master_key)
+{
+ json_t *obj;
+ const char *sig_enc;
+ const char *deposit_valid_until_enc;
+ const char *withdraw_valid_until_enc;
+ const char *valid_from_enc;
+ const char *key_enc;
+ struct TALER_MINT_DenomPublicKey *denom_key;
+ struct GNUNET_TIME_Absolute valid_from;
+ struct GNUNET_TIME_Absolute withdraw_valid_until;
+ struct GNUNET_TIME_Absolute deposit_valid_until;
+ struct TALER_Amount value;
+ struct TALER_Amount fee_withdraw;
+ struct TALER_Amount fee_deposit;
+ struct TALER_Amount fee_refresh;
+ struct TALER_MINT_DenomKeyIssue denom_key_issue;
+ struct GNUNET_CRYPTO_EddsaSignature sig;
+
+ EXITIF (JSON_OBJECT != json_typeof (denom_key_obj));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "master_sig")));
+ EXITIF (NULL == (sig_enc = json_string_value (obj)));
+ EXITIF (103 != strlen (sig_enc));
+ EXITIF (GNUNET_OK != GNUNET_STRINGS_string_to_data (sig_enc, 103,
+ &sig, sizeof (sig)));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "stamp_expire_deposit")));
+ EXITIF (NULL == (deposit_valid_until_enc = json_string_value (obj)));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "stamp_expire_withdraw")));
+ EXITIF (NULL == (withdraw_valid_until_enc = json_string_value (obj)));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "stamp_start")));
+ EXITIF (NULL == (valid_from_enc = json_string_value (obj)));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "denom_pub")));
+ EXITIF (NULL == (key_enc = json_string_value (obj)));
+ EXITIF (52 != strlen (key_enc)); /* strlen(base32(char[32])) = 52 */
+ EXITIF (GNUNET_SYSERR == parse_timestamp (&valid_from, valid_from_enc));
+ EXITIF (GNUNET_SYSERR == parse_timestamp (&withdraw_valid_until,
+ withdraw_valid_until_enc));
+ EXITIF (GNUNET_SYSERR == parse_timestamp (&deposit_valid_until,
+ deposit_valid_until_enc));
+
+ (void) memset (&denom_key_issue, 0, sizeof (denom_key_issue));
+ EXITIF (GNUNET_OK != GNUNET_STRINGS_string_to_data (key_enc, 52,
+ &denom_key_issue.denom_pub,
+ sizeof (struct TALER_RSA_PublicKeyBinaryEncoded)));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "value")));
+ EXITIF (GNUNET_SYSERR == parse_json_amount (obj, &value));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "fee_withdraw")));
+ EXITIF (GNUNET_SYSERR == parse_json_amount (obj, &fee_withdraw));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "fee_deposit")));
+ EXITIF (GNUNET_SYSERR == parse_json_amount (obj, &fee_deposit));
+ EXITIF (NULL == (obj = json_object_get (denom_key_obj, "fee_refresh")));
+ EXITIF (GNUNET_SYSERR == parse_json_amount (obj, &fee_refresh));
+ denom_key_issue.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_DENOM);
+ denom_key_issue.purpose.size = htonl
+ (sizeof (struct TALER_MINT_DenomKeyIssue) -
+ offsetof (struct TALER_MINT_DenomKeyIssue, purpose));
+ denom_key_issue.master = *master_key;
+ denom_key_issue.start = GNUNET_TIME_absolute_hton (valid_from);
+ denom_key_issue.expire_withdraw = GNUNET_TIME_absolute_hton (withdraw_valid_until);
+ denom_key_issue.expire_spend = GNUNET_TIME_absolute_hton (deposit_valid_until);
+ denom_key_issue.value = TALER_amount_hton (value);
+ denom_key_issue.fee_withdraw = TALER_amount_hton (fee_withdraw);
+ denom_key_issue.fee_deposit = TALER_amount_hton (fee_deposit);
+ denom_key_issue.fee_refresh = TALER_amount_hton (fee_refresh);
+ EXITIF (GNUNET_SYSERR ==
+ GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_DENOM,
+ &denom_key_issue.purpose,
+ &sig,
+ master_key));
+ denom_key = GNUNET_new (struct TALER_MINT_DenomPublicKey);
+ denom_key->key = denom_key_issue.denom_pub;
+ denom_key->valid_from = valid_from;
+ denom_key->withdraw_valid_until = withdraw_valid_until;
+ denom_key->deposit_valid_until = deposit_valid_until;
+ denom_key->value = value;
+ denom_key->fee_withdraw = fee_withdraw;
+ denom_key->fee_deposit = fee_deposit;
+ denom_key->fee_refresh = fee_refresh;
+ *_denom_key = denom_key;
+ return GNUNET_OK;
+
+ EXITIF_exit:
+ return GNUNET_SYSERR;
+}
+
+static int
+parse_response_keys_get (const char *in, size_t size,
+ struct TALER_MINT_SigningPublicKey ***_sign_keys,
+ unsigned int *_n_sign_keys,
+ struct TALER_MINT_DenomPublicKey ***_denom_keys,
+ unsigned int *_n_denom_keys)
+{
+ json_t *resp_obj;
+ struct TALER_MINT_DenomPublicKey **denom_keys;
+ struct GNUNET_CRYPTO_EddsaPublicKey master_key;
+ struct GNUNET_TIME_Absolute list_issue_date;
+ struct TALER_MINT_SigningPublicKey **sign_keys;
+ unsigned int n_denom_keys;
+ unsigned int n_sign_keys;
+ json_error_t error;
+ unsigned int index;
+ int OK;
+
+ denom_keys = NULL;
+ n_denom_keys = 0;
+ sign_keys = NULL;
+ n_sign_keys = 0;
+ OK = 0;
+ resp_obj = json_loadb (in, size,
+ JSON_REJECT_DUPLICATES | JSON_DISABLE_EOF_CHECK,
+ &error);
+ if (NULL == resp_obj)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unable to parse received data as JSON object\n");
+ return GNUNET_SYSERR;
+ }
+
+ EXITIF (JSON_OBJECT != json_typeof (resp_obj));
+ {
+ /* parse the master public key */
+ json_t *master_key_obj;
+ const char *master_key_enc;
+
+ EXITIF (NULL == (master_key_obj = json_object_get (resp_obj, "master_pub")));
+ EXITIF (NULL == (master_key_enc = json_string_value (master_key_obj)));
+ EXITIF (52 != strlen (master_key_enc)); /* strlen(base32(char[32])) = 52 */
+ EXITIF (GNUNET_OK !=
+ GNUNET_CRYPTO_eddsa_public_key_from_string (master_key_enc,
+ 52,
+ &master_key));
+ }
+ {
+ /* parse the issue date of the response */
+ json_t *list_issue_date_obj;
+ const char *tstamp_enc;
+
+ EXITIF (NULL == (list_issue_date_obj =
+ json_object_get(resp_obj, "list_issue_date")));
+ EXITIF (NULL == (tstamp_enc = json_string_value (list_issue_date_obj)));
+ EXITIF (GNUNET_SYSERR == parse_timestamp (&list_issue_date, tstamp_enc));
+ }
+ {
+ /* parse the signing keys */
+ json_t *sign_keys_array;
+ json_t *sign_key_obj;
+
+ EXITIF (NULL == (sign_keys_array =
+ json_object_get (resp_obj, "signkeys")));
+ EXITIF (JSON_ARRAY != json_typeof (sign_keys_array));
+ EXITIF (0 == (n_sign_keys = json_array_size (sign_keys_array)));
+ sign_keys = GNUNET_malloc (sizeof (struct TALER_MINT_SigningPublicKey *)
+ * (n_sign_keys + 1));
+ index = 0;
+ json_array_foreach (sign_keys_array, index, sign_key_obj) {
+ EXITIF (GNUNET_SYSERR == parse_json_signkey (&sign_keys[index],
+ sign_key_obj,
+ &master_key));
+ }
+ }
+ {
+ /* parse the denomination keys */
+ json_t *denom_keys_array;
+ json_t *denom_key_obj;
+
+ EXITIF (NULL == (denom_keys_array = json_object_get (resp_obj, "denoms")));
+ EXITIF (JSON_ARRAY != json_typeof (denom_keys_array));
+ EXITIF (0 == (n_denom_keys = json_array_size (denom_keys_array)));
+ denom_keys = GNUNET_malloc (sizeof (struct TALER_MINT_DenomPublicKey *)
+ * (n_denom_keys + 1));
+ index = 0;
+ json_array_foreach (denom_keys_array, index, denom_key_obj) {
+ EXITIF (GNUNET_SYSERR == parse_json_denomkey (&denom_keys[index],
+ denom_key_obj,
+ &master_key));
+ }
+ }
+ OK = 1;
+
+ EXITIF_exit:
+ json_decref (resp_obj);
+ if (!OK)
+ {
+ if (NULL != sign_keys)
+ {
+ for (index=0; NULL != sign_keys[index]; index++)
+ GNUNET_free_non_null (sign_keys[index]);
+ GNUNET_free (sign_keys);
+ }
+ if (NULL != denom_keys)
+ {
+ for (index=0; NULL != denom_keys[index]; index++)
+ GNUNET_free_non_null (denom_keys[index]);
+ GNUNET_free (denom_keys);
+ }
+ return GNUNET_SYSERR;
+ }
+
+ *_sign_keys = sign_keys;
+ *_n_sign_keys = n_sign_keys;
+ *_denom_keys = denom_keys;
+ *_n_denom_keys = n_denom_keys;
+ return GNUNET_OK;
+}
+
+
+int
+parse_deposit_response (void *buf, size_t size, int *r_status, json_t **r_obj)
+{
+ json_t *obj;
+ const char *status_str;
+ json_error_t error;
+
+ status_str = NULL;
+ obj = NULL;
+ obj = json_loadb (buf, size,
+ JSON_REJECT_DUPLICATES | JSON_DISABLE_EOF_CHECK, &error);
+ if (NULL == obj)
+ {
+ JSON_WARN (error);
+ return GNUNET_SYSERR;
+ }
+ EXITIF (-1 == json_unpack (obj, "{s:s}", "status", &status_str));
+ LOG_DEBUG ("Received deposit response: %s from mint\n", status_str);
+ if (0 == strcmp ("DEPOSIT_OK", status_str))
+ *r_status = 1;
+ else if (0 == strcmp ("DEPOSIT_QUEUED", status_str))
+ *r_status = 2;
+ else
+ *r_status = 0;
+ *r_obj = obj;
+
+ return GNUNET_OK;
+ EXITIF_exit:
+ json_decref (obj);
+ return GNUNET_SYSERR;
+}
+
+#undef EXITIF
+
+static void
+mint_connect (struct TALER_MINT_Handle *mint)
+{
+ struct TALER_MINT_Context *ctx = mint->ctx;
+
+ GNUNET_assert (0 == mint->connected);
+ GNUNET_assert (CURLM_OK == curl_multi_add_handle (ctx->multi, mint->curl));
+ mint->connected = GNUNET_YES;
+}
+
+static void
+mint_disconnect (struct TALER_MINT_Handle *mint)
+{
+ struct TALER_MINT_Context *ctx = mint->ctx;
+
+ GNUNET_assert (GNUNET_YES == mint->connected);
+ GNUNET_break (CURLM_OK == curl_multi_remove_handle (ctx->multi,
+ mint->curl));
+ mint->connected = GNUNET_NO;
+ GNUNET_free_non_null (mint->buf);
+ mint->buf = NULL;
+ mint->buf_size = 0;
+ mint->req_type = REQUEST_TYPE_NONE;
+ mint->req.none = NULL;
+}
+
+static void
+cleanup_keys_get (struct TALER_MINT_KeysGetHandle *gh)
+{
+ GNUNET_free (gh->url);
+ GNUNET_free (gh);
+}
+
+static void
+cleanup_deposit (struct TALER_MINT_DepositHandle *dh)
+{
+ curl_slist_free_all (dh->headers);
+ GNUNET_free_non_null (dh->json_enc);
+ GNUNET_free (dh->url);
+ GNUNET_free (dh);
+}
+
+static void
+request_failed (struct TALER_MINT_Handle *mint, long resp_code)
+{
+ switch (mint->req_type)
+ {
+ case REQUEST_TYPE_NONE:
+ GNUNET_assert (0);
+ break;
+ case REQUEST_TYPE_KEYSGET:
+ {
+ struct TALER_MINT_KeysGetHandle *gh = mint->req.keys_get;
+ TALER_MINT_ContinuationCallback cont_cb;
+ void *cont_cls;
+ GNUNET_assert (NULL != gh);
+ cont_cb = gh->cont_cb;
+ cont_cls = gh->cont_cls;
+ cleanup_keys_get (gh);
+ mint_disconnect (mint);
+ cont_cb (cont_cls, mint->emsg);
+ }
+ break;
+ case REQUEST_TYPE_DEPOSIT:
+ {
+ struct TALER_MINT_DepositHandle *dh = mint->req.deposit;
+ TALER_MINT_DepositResultCallback cb = dh->cb;
+ void *cls = dh->cls;
+ GNUNET_assert (NULL != dh);
+ cleanup_deposit (dh);
+ mint_disconnect (mint);
+ cb (cls, 0, NULL, mint->emsg);
+ }
+ break;
+ }
+}
+
+static void
+request_succeeded (struct TALER_MINT_Handle *mint, long resp_code)
+{
+ char *emsg;
+
+ emsg = NULL;
+ switch (mint->req_type)
+ {
+ case REQUEST_TYPE_NONE:
+ GNUNET_assert (0);
+ break;
+ case REQUEST_TYPE_KEYSGET:
+ {
+ struct TALER_MINT_KeysGetHandle *gh = mint->req.keys_get;
+ TALER_MINT_ContinuationCallback cont_cb;
+ void *cont_cls;
+ struct TALER_MINT_SigningPublicKey **sign_keys;
+ struct TALER_MINT_DenomPublicKey **denom_keys;
+ unsigned int n_sign_keys;
+ unsigned int n_denom_keys;
+
+ GNUNET_assert (NULL != gh);
+ cont_cb = gh->cont_cb;
+ cont_cls = gh->cont_cls;
+ if (200 == resp_code)
+ {
+ /* parse JSON object from the mint->buf which is of size mint->buf_size */
+ if (GNUNET_OK ==
+ parse_response_keys_get (mint->buf, mint->buf_size,
+ &sign_keys, &n_sign_keys,
+ &denom_keys, &n_denom_keys))
+ gh->cb (gh->cls, sign_keys, denom_keys);
+ else
+ emsg = GNUNET_strdup ("Error parsing response");
+ }
+ else
+ GNUNET_asprintf (&emsg, "Failed with response code: %ld", resp_code);
+ cleanup_keys_get (gh);
+ mint_disconnect (mint);
+ cont_cb (cont_cls, emsg);
+ }
+ break;
+ case REQUEST_TYPE_DEPOSIT:
+ {
+ struct TALER_MINT_DepositHandle *dh = mint->req.deposit;
+ TALER_MINT_DepositResultCallback cb;
+ void *cls;
+ int status;
+ json_t *obj;
+
+ GNUNET_assert (NULL != dh);
+ obj = NULL;
+ cb = dh->cb;
+ cls = dh->cls;
+ status = 0;
+ if (200 == resp_code)
+ {
+ /* parse JSON object from the mint->buf which is of size mint->buf_size */
+ if (GNUNET_OK !=
+ parse_deposit_response (mint->buf, mint->buf_size,
+ &status, &obj))
+ emsg = GNUNET_strdup ("Error parsing response");
+ }
+ else
+ GNUNET_asprintf (&emsg, "Failed with response code: %ld", resp_code);
+ cleanup_deposit (dh);
+ mint_disconnect (mint);
+ cb (cls, status, obj, emsg);
+ }
+ break;
+ }
+ GNUNET_free_non_null (emsg);
+}
+
+
+static void
+do_perform (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+static void
+perform (struct TALER_MINT_Context *ctx)
+{
+ fd_set fd_rs;
+ fd_set fd_ws;
+ struct GNUNET_NETWORK_FDSet rs;
+ struct GNUNET_NETWORK_FDSet ws;
+ CURLMsg *cmsg;
+ struct TALER_MINT_Handle *mint;
+ long timeout;
+ long resp_code;
+ static unsigned int n_old;
+ int n_running;
+ int n_completed;
+ int max_fd;
+
+ n_completed = 0;
+ curl_multi_perform (ctx->multi, &n_running);
+ GNUNET_assert (0 <= n_running);
+ if ((0 == n_running) || (n_running < n_old))
+ {
+ /* some requests were completed -- handle them */
+ while (NULL != (cmsg = curl_multi_info_read (ctx->multi, &n_completed)))
+ {
+ GNUNET_break (CURLMSG_DONE == cmsg->msg); /* curl only has CURLMSG_DONE */
+ GNUNET_assert (CURLE_OK == curl_easy_getinfo (cmsg->easy_handle,
+ CURLINFO_PRIVATE,
+ (char *) &mint));
+ GNUNET_assert (CURLE_OK == curl_easy_getinfo (cmsg->easy_handle,
+ CURLINFO_RESPONSE_CODE,
+ &resp_code));
+ GNUNET_assert (ctx == mint->ctx); /* did we get the correct one? */
+ if (CURLE_OK == cmsg->data.result)
+ request_succeeded (mint, resp_code);
+ else
+ request_failed (mint, resp_code);
+ }
+ }
+ n_old = n_running;
+ /* reschedule perform() */
+ if (0 != n_old)
+ {
+ FD_ZERO (&fd_rs);
+ FD_ZERO (&fd_ws);
+ GNUNET_assert (CURLM_OK == curl_multi_fdset (ctx->multi,
+ &fd_rs,
+ &fd_ws,
+ NULL,
+ &max_fd));
+ if (-1 == max_fd)
+ {
+ ctx->perform_task = GNUNET_SCHEDULER_add_delayed
+ (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 100),
+ &do_perform, ctx);
+ return;
+ }
+ GNUNET_assert (CURLM_OK == curl_multi_timeout (ctx->multi, &timeout));
+ if (-1 == timeout)
+ {
+ timeout = 1000 * 60 * 5;
+ }
+ GNUNET_NETWORK_fdset_zero (&rs);
+ GNUNET_NETWORK_fdset_zero (&ws);
+ GNUNET_NETWORK_fdset_copy_native (&rs, &fd_rs, max_fd + 1);
+ GNUNET_NETWORK_fdset_copy_native (&ws, &fd_ws, max_fd + 1);
+ ctx->perform_task = GNUNET_SCHEDULER_add_select
+ (GNUNET_SCHEDULER_PRIORITY_KEEP,
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, timeout),
+ &rs, &ws,
+ &do_perform, ctx);
+ }
+}
+
+
+static void
+do_perform (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct TALER_MINT_Context *ctx = cls;
+
+ GNUNET_assert (NULL != ctx->perform_task);
+ ctx->perform_task = NULL;
+ perform (ctx);
+}
+
+static void
+perform_now (struct TALER_MINT_Context *ctx)
+{
+ if (NULL != ctx->perform_task)
+ {
+ GNUNET_SCHEDULER_cancel (ctx->perform_task);
+ ctx->perform_task = NULL;
+ }
+ ctx->perform_task = GNUNET_SCHEDULER_add_now (&do_perform, ctx);
+}
+
+
+/* This function gets called by libcurl as soon as there is data received that */
+/* needs to be saved. The size of the data pointed to by ptr is size */
+/* multiplied with nmemb, it will not be zero terminated. Return the number */
+/* of bytes actually taken care of. If that amount differs from the amount passed */
+/* to your function, it'll signal an error to the library. This will abort the */
+/* transfer and return CURLE_WRITE_ERROR. */
+
+/* From 7.18.0, the function can return CURL_WRITEFUNC_PAUSE which then will */
+/* cause writing to this connection to become paused. See */
+/* curl_easy_pause(3) for further details. */
+
+/* This function may be called with zero bytes data if the transferred file is */
+/* empty. */
+
+/* Set this option to NULL to get the internal default function. The internal */
+/* default function will write the data to the FILE * given with */
+/* CURLOPT_WRITEDATA. */
+
+/* Set the userdata argument with the CURLOPT_WRITEDATA option. */
+
+/* The callback function will be passed as much data as possible in all invokes, */
+/* but you cannot possibly make any assumptions. It may be one byte, it may be */
+/* thousands. The maximum amount of body data that can be passed to the write */
+/* callback is defined in the curl.h header file: CURL_MAX_WRITE_SIZE (the usual */
+/* default is 16K). If you however have CURLOPT_HEADER set, which sends */
+/* header data to the write callback, you can get up to */
+/* CURL_MAX_HTTP_HEADER bytes of header data passed into it. This usually */
+/* means 100K. */
+static size_t
+download (char *bufptr, size_t size, size_t nitems, void *cls)
+{
+ struct TALER_MINT_Handle *mint = cls;
+ size_t msize;
+ void *buf;
+
+ if (0 == size * nitems)
+ {
+ /* file is empty */
+ return 0;
+ }
+ msize = size * nitems;
+ mint->buf = GNUNET_realloc (mint->buf, mint->buf_size + msize);
+ buf = mint->buf + mint->buf_size;
+ memcpy (buf, bufptr, msize);
+ mint->buf_size += msize;
+ return msize;
+}
+
+
+/**
+ * Initialise a connection to the mint.
+ *
+ * @param ctx the context
+ * @param hostname the hostname of the mint
+ * @param port the point where the mint's HTTP service is running.
+ * @param mint_key the public key of the mint. This is used to verify the
+ * responses of the mint.
+ * @return the mint handle; NULL upon error
+ */
+struct TALER_MINT_Handle *
+TALER_MINT_connect (struct TALER_MINT_Context *ctx,
+ const char *hostname,
+ uint16_t port,
+ struct GNUNET_CRYPTO_EddsaPublicKey *mint_key)
+{
+ struct TALER_MINT_Handle *mint;
+
+ mint = GNUNET_new (struct TALER_MINT_Handle);
+ mint->ctx = ctx;
+ mint->hostname = GNUNET_strdup (hostname);
+ mint->port = (0 != port) ? port : 80;
+ mint->curl = curl_easy_init ();
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_SHARE, ctx->share));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_ERRORBUFFER, mint->emsg));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_WRITEFUNCTION, &download));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_WRITEDATA, mint));
+ GNUNET_assert (CURLE_OK == curl_easy_setopt (mint->curl, CURLOPT_PRIVATE, mint));
+ return mint;
+}
+
+/**
+ * Disconnect from the mint
+ *
+ * @param mint the mint handle
+ */
+void
+TALER_MINT_disconnect (struct TALER_MINT_Handle *mint)
+{
+ if (GNUNET_YES == mint->connected)
+ mint_disconnect (mint);
+ curl_easy_cleanup (mint->curl);
+ GNUNET_free (mint->hostname);
+ GNUNET_free (mint);
+}
+
+/**
+ * Get the signing and denomination key of the mint.
+ *
+ * @param mint handle to the mint
+ * @param cb the callback to call with each retrieved denomination key
+ * @param cls closure for the above callback
+ * @param cont_cb the callback to call after completing this asynchronous call
+ * @param cont_cls the closure for the continuation callback
+ * @return a handle to this asynchronous call; NULL upon eror
+ */
+struct TALER_MINT_KeysGetHandle *
+TALER_MINT_keys_get (struct TALER_MINT_Handle *mint,
+ TALER_MINT_KeysGetCallback cb, void *cls,
+ TALER_MINT_ContinuationCallback cont_cb, void *cont_cls)
+{
+ struct TALER_MINT_KeysGetHandle *gh;
+
+ GNUNET_assert (REQUEST_TYPE_NONE == mint->req_type);
+ gh = GNUNET_new (struct TALER_MINT_KeysGetHandle);
+ gh->mint = mint;
+ mint->req_type = REQUEST_TYPE_KEYSGET;
+ mint->req.keys_get = gh;
+ gh->cb = cb;
+ gh->cls = cls;
+ gh->cont_cb = cont_cb;
+ gh->cont_cls = cont_cls;
+ GNUNET_asprintf (&gh->url, "http://%s:%hu/keys", mint->hostname, mint->port);
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_URL, gh->url));
+ if (GNUNET_NO == mint->connected)
+ mint_connect (mint);
+ perform_now (mint->ctx);
+ return gh;
+}
+
+
+/**
+ * Cancel the asynchronous call initiated by TALER_MINT_keys_get(). This
+ * should not be called if either of the @a TALER_MINT_KeysGetCallback or
+ * @a TALER_MINT_ContinuationCallback passed to TALER_MINT_keys_get() have
+ * been called.
+ *
+ * @param get the handle for retrieving the keys
+ */
+void
+TALER_MINT_keys_get_cancel (struct TALER_MINT_KeysGetHandle *get)
+{
+ struct TALER_MINT_Handle *mint = get->mint;
+
+ mint_disconnect (mint);
+ cleanup_keys_get (get);
+}
+
+/**
+ * Submit a deposit permission to the mint and get the mint's response
+ *
+ * @param mint the mint handle
+ * @param cb the callback to call when a reply for this request is available
+ * @param cls closure for the above callback
+ * @param deposit_obj the deposit permission received from the customer along
+ * with the wireformat JSON object
+ * @return a handle for this request; NULL if the JSON object could not be
+ * parsed or is of incorrect format or any other error. In this case,
+ * the callback is not called.
+ */
+struct TALER_MINT_DepositHandle *
+TALER_MINT_deposit_submit_json (struct TALER_MINT_Handle *mint,
+ TALER_MINT_DepositResultCallback cb,
+ void *cls,
+ json_t *deposit_obj)
+{
+ struct TALER_MINT_DepositHandle *dh;
+
+ GNUNET_assert (REQUEST_TYPE_NONE == mint->req_type);
+ dh = GNUNET_new (struct TALER_MINT_DepositHandle);
+ dh->mint = mint;
+ mint->req_type = REQUEST_TYPE_DEPOSIT;
+ mint->req.deposit = dh;
+ dh->cb = cb;
+ dh->cls = cls;
+ GNUNET_asprintf (&dh->url, "http://%s:%hu/deposit", mint->hostname, mint->port);
+ GNUNET_assert (NULL != (dh->json_enc = json_dumps (deposit_obj, JSON_COMPACT)));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_URL, dh->url));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_POSTFIELDS,
+ dh->json_enc));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_POSTFIELDSIZE,
+ strlen (dh->json_enc)));
+ GNUNET_assert (NULL != (dh->headers =
+ curl_slist_append (dh->headers, "Content-Type: application/json")));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (mint->curl, CURLOPT_HTTPHEADER, dh->headers));
+ if (GNUNET_NO == mint->connected)
+ mint_connect (mint);
+ perform_now (mint->ctx);
+ return dh;
+}
+
+
+/**
+ * Cancel a deposit permission request. This function cannot be used on a
+ * request handle if a response is already served for it.
+ *
+ * @param the deposit permission request handle
+ */
+void
+TALER_MINT_deposit_submit_cancel (struct TALER_MINT_DepositHandle *deposit)
+{
+ struct TALER_MINT_Handle *mint = deposit->mint;
+
+ mint_disconnect (mint);
+ cleanup_deposit (deposit);
+}
+
+
+/**
+ * Initialise this library. This function should be called before using any of
+ * the following functions.
+ *
+ * @return library context
+ */
+struct TALER_MINT_Context *
+TALER_MINT_init ()
+{
+ struct TALER_MINT_Context *ctx;
+ CURLM *multi;
+ CURLSH *share;
+
+ if (fail)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "cURL was not initialised properly\n");
+ return NULL;
+ }
+ if (NULL == (multi = curl_multi_init ()))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Cannot create a cURL multi handle\n");
+ return NULL;
+ }
+ if (NULL == (share = curl_share_init ()))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Cannot create a cURL share handle\n");
+ return NULL;
+ }
+ ctx = GNUNET_new (struct TALER_MINT_Context);
+ ctx->multi = multi;
+ ctx->share = share;
+ return ctx;
+}
+
+
+/**
+ * Cleanup library initialisation resources. This function should be called
+ * after using this library to cleanup the resources occupied during library's
+ * initialisation.
+ *
+ * @param ctx the library context
+ */
+void
+TALER_MINT_cleanup (struct TALER_MINT_Context *ctx)
+{
+ curl_share_cleanup (ctx->share);
+ curl_multi_cleanup (ctx->multi);
+ if (NULL != ctx->perform_task)
+ {
+ GNUNET_break (0); /* investigate why this happens */
+ GNUNET_SCHEDULER_cancel (ctx->perform_task);
+ }
+ GNUNET_free (ctx);
+}
+
+
+__attribute__ ((constructor))
+void
+TALER_MINT_constructor__ (void)
+{
+ CURLcode ret;
+ if (CURLE_OK != (ret = curl_global_init (CURL_GLOBAL_DEFAULT)))
+ {
+ CURL_STRERROR (GNUNET_ERROR_TYPE_ERROR, "curl_global_init", ret);
+ fail = 1;
+ }
+}
+
+__attribute__ ((destructor))
+void
+TALER_MINT_destructor__ (void)
+{
+ if (fail)
+ return;
+ curl_global_cleanup ();
+}
diff --git a/src/mint/mint_common.c b/src/mint/mint_common.c
new file mode 100644
index 00000000..4afbf072
--- /dev/null
+++ b/src/mint/mint_common.c
@@ -0,0 +1,283 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file mint_common.c
+ * @brief Common functionality for the mint
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Sree Harsha Totakura
+ */
+
+#include "platform.h"
+#include "mint.h"
+
+struct SignkeysIterateContext
+{
+ TALER_MINT_SignkeyIterator it;
+ void *it_cls;
+};
+
+
+struct DenomkeysIterateContext
+{
+ const char *alias;
+ TALER_MINT_DenomkeyIterator it;
+ void *it_cls;
+};
+
+
+static int
+signkeys_iterate_dir_iter (void *cls,
+ const char *filename)
+{
+
+ struct SignkeysIterateContext *skc = cls;
+ ssize_t nread;
+ struct TALER_MINT_SignKeyIssue issue;
+ nread = GNUNET_DISK_fn_read (filename,
+ &issue,
+ sizeof (struct TALER_MINT_SignKeyIssue));
+ if (nread != sizeof (struct TALER_MINT_SignKeyIssue))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Invalid signkey file: '%s'\n", filename);
+ return GNUNET_OK;
+ }
+ return skc->it (skc->it_cls, &issue);
+}
+
+
+int
+TALER_MINT_signkeys_iterate (const char *mint_base_dir,
+ TALER_MINT_SignkeyIterator it, void *cls)
+{
+ char *signkey_dir;
+ size_t len;
+ struct SignkeysIterateContext skc;
+
+ len = GNUNET_asprintf (&signkey_dir, ("%s" DIR_SEPARATOR_STR DIR_SIGNKEYS), mint_base_dir);
+ GNUNET_assert (len > 0);
+
+ skc.it = it;
+ skc.it_cls = cls;
+
+ return GNUNET_DISK_directory_scan (signkey_dir, &signkeys_iterate_dir_iter, &skc);
+}
+
+
+/**
+ * Import a denomination key from the given file
+ *
+ * @param filename the file to import the key from
+ * @param dki pointer to return the imported denomination key
+ * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
+ */
+int
+TALER_MINT_read_denom_key (const char *filename,
+ struct TALER_MINT_DenomKeyIssue *dki)
+{
+ uint64_t size;
+ size_t offset;
+ void *data;
+ struct TALER_RSA_PrivateKey *priv;
+ int ret;
+
+ ret = GNUNET_SYSERR;
+ data = NULL;
+ offset = sizeof (struct TALER_MINT_DenomKeyIssue)
+ - offsetof (struct TALER_MINT_DenomKeyIssue, signature);
+ if (GNUNET_OK != GNUNET_DISK_file_size (filename,
+ &size,
+ GNUNET_YES,
+ GNUNET_YES))
+ goto cleanup;
+ if (size <= offset)
+ {
+ GNUNET_break (0);
+ goto cleanup;
+ }
+ data = GNUNET_malloc (size);
+ if (size != GNUNET_DISK_fn_read (filename,
+ data,
+ size))
+ goto cleanup;
+ if (NULL == (priv = TALER_RSA_decode_key (data + offset, size - offset)))
+ goto cleanup;
+ dki->denom_priv = priv;
+ (void) memcpy (&dki->signature, data, offset);
+ ret = GNUNET_OK;
+
+ cleanup:
+ GNUNET_free_non_null (data);
+ return ret;
+}
+
+
+/**
+ * Exports a denomination key to the given file
+ *
+ * @param filename the file where to write the denomination key
+ * @param dki the denomination key
+ * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure.
+ */
+int
+TALER_MINT_write_denom_key (const char *filename,
+ const struct TALER_MINT_DenomKeyIssue *dki)
+{
+ struct TALER_RSA_PrivateKeyBinaryEncoded *priv_enc;
+ struct GNUNET_DISK_FileHandle *fh;
+ ssize_t wrote;
+ size_t wsize;
+ int ret;
+
+ fh = NULL;
+ priv_enc = NULL;
+ ret = GNUNET_SYSERR;
+ if (NULL == (fh = GNUNET_DISK_file_open
+ (filename,
+ GNUNET_DISK_OPEN_WRITE | GNUNET_DISK_OPEN_CREATE | GNUNET_DISK_OPEN_TRUNCATE,
+ GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE)))
+ goto cleanup;
+ if (NULL == (priv_enc = TALER_RSA_encode_key (dki->denom_priv)))
+ goto cleanup;
+ wsize = sizeof (struct TALER_MINT_DenomKeyIssue)
+ - offsetof (struct TALER_MINT_DenomKeyIssue, signature);
+ if (GNUNET_SYSERR == (wrote = GNUNET_DISK_file_write (fh,
+ &dki->signature,
+ wsize)))
+ goto cleanup;
+ if (wrote != wsize)
+ goto cleanup;
+ wsize = ntohs (priv_enc->len);
+ if (GNUNET_SYSERR == (wrote = GNUNET_DISK_file_write (fh,
+ priv_enc,
+ wsize)))
+ goto cleanup;
+ if (wrote != wsize)
+ goto cleanup;
+ ret = GNUNET_OK;
+ cleanup:
+ GNUNET_free_non_null (priv_enc);
+ if (NULL != fh)
+ (void) GNUNET_DISK_file_close (fh);
+ return ret;
+}
+
+
+static int
+denomkeys_iterate_keydir_iter (void *cls,
+ const char *filename)
+{
+
+ struct DenomkeysIterateContext *dic = cls;
+ struct TALER_MINT_DenomKeyIssue issue;
+
+ if (GNUNET_OK != TALER_MINT_read_denom_key (filename, &issue))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Invalid denomkey file: '%s'\n", filename);
+ return GNUNET_OK;
+ }
+ return dic->it (dic->it_cls, dic->alias, &issue);
+}
+
+
+static int
+denomkeys_iterate_topdir_iter (void *cls,
+ const char *filename)
+{
+
+ struct DenomkeysIterateContext *dic = cls;
+ dic->alias = GNUNET_STRINGS_get_short_name (filename);
+
+ // FIXME: differentiate between error case and normal iteration abortion
+ if (0 > GNUNET_DISK_directory_scan (filename, &denomkeys_iterate_keydir_iter, dic))
+ return GNUNET_SYSERR;
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_denomkeys_iterate (const char *mint_base_dir,
+ TALER_MINT_DenomkeyIterator it, void *cls)
+{
+ char *dir;
+ size_t len;
+ struct DenomkeysIterateContext dic;
+ len = GNUNET_asprintf (&dir, ("%s" DIR_SEPARATOR_STR DIR_DENOMKEYS),
+ mint_base_dir);
+ GNUNET_assert (len > 0);
+
+ dic.it = it;
+ dic.it_cls = cls;
+
+ // scan over alias dirs
+ return GNUNET_DISK_directory_scan (dir, &denomkeys_iterate_topdir_iter, &dic);
+}
+
+
+struct GNUNET_CONFIGURATION_Handle *
+TALER_MINT_config_load (const char *mint_base_dir)
+{
+ struct GNUNET_CONFIGURATION_Handle *cfg;
+ char *cfg_dir;
+ int res;
+
+ res = GNUNET_asprintf (&cfg_dir, "%s" DIR_SEPARATOR_STR "config", mint_base_dir);
+ GNUNET_assert (res > 0);
+
+ cfg = GNUNET_CONFIGURATION_create ();
+ res = GNUNET_CONFIGURATION_load_from (cfg, cfg_dir);
+ GNUNET_free (cfg_dir);
+ if (GNUNET_OK != res)
+ return NULL;
+ return cfg;
+}
+
+int
+TALER_TALER_DB_extract_amount_nbo (PGresult *result, unsigned int row,
+ int indices[3], struct TALER_AmountNBO *denom_nbo)
+{
+ if ((indices[0] < 0) || (indices[1] < 0) || (indices[2] < 0))
+ return GNUNET_NO;
+ if (sizeof (uint32_t) != PQgetlength (result, row, indices[0]))
+ return GNUNET_SYSERR;
+ if (sizeof (uint32_t) != PQgetlength (result, row, indices[1]))
+ return GNUNET_SYSERR;
+ if (PQgetlength (result, row, indices[2]) > TALER_CURRENCY_LEN)
+ return GNUNET_SYSERR;
+ denom_nbo->value = *(uint32_t *) PQgetvalue (result, row, indices[0]);
+ denom_nbo->fraction = *(uint32_t *) PQgetvalue (result, row, indices[1]);
+ memset (denom_nbo->currency, 0, TALER_CURRENCY_LEN);
+ memcpy (denom_nbo->currency, PQgetvalue (result, row, indices[2]), PQgetlength (result, row, indices[2]));
+ return GNUNET_OK;
+}
+
+
+int
+TALER_TALER_DB_extract_amount (PGresult *result, unsigned int row,
+ int indices[3], struct TALER_Amount *denom)
+{
+ struct TALER_AmountNBO denom_nbo;
+ int res;
+
+ res = TALER_TALER_DB_extract_amount_nbo (result, row, indices, &denom_nbo);
+ if (GNUNET_OK != res)
+ return res;
+ *denom = TALER_amount_ntoh (denom_nbo);
+ return GNUNET_OK;
+}
+
+/* end of mint_common.c */
diff --git a/src/mint/mint_db.c b/src/mint/mint_db.c
new file mode 100644
index 00000000..6dc02587
--- /dev/null
+++ b/src/mint/mint_db.c
@@ -0,0 +1,1838 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file mint_db.c
+ * @brief Database access for the mint
+ * @author Florian Dold
+ */
+#include "platform.h"
+#include "taler_db_lib.h"
+#include "taler_signatures.h"
+#include "mint_db.h"
+#include "mint.h"
+#include <pthread.h>
+
+/**
+ * Thread-local database connection.
+ * Contains a pointer to PGconn or NULL.
+ */
+static pthread_key_t db_conn_threadlocal;
+
+
+/**
+ * Database connection string, as read from
+ * the configuration.
+ */
+static char *TALER_MINT_db_connection_cfg_str;
+
+
+#define break_db_err(result) do { \
+ GNUNET_break(0); \
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Database failure: %s\n", PQresultErrorMessage (result)); \
+ } while (0)
+
+/**
+ * Shorthand for exit jumps.
+ */
+#define EXITIF(cond) \
+ do { \
+ if (cond) { GNUNET_break (0); goto EXITIF_exit; } \
+ } while (0)
+
+int
+TALER_MINT_DB_get_collectable_blindcoin (PGconn *db_conn,
+ struct TALER_RSA_BlindedSignaturePurpose *blind_ev,
+ struct CollectableBlindcoin *collectable)
+{
+ PGresult *result;
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR (blind_ev),
+ TALER_DB_QUERY_PARAM_END
+ };
+ result = TALER_DB_exec_prepared (db_conn, "get_collectable_blindcoins", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Query failed: %s\n", PQresultErrorMessage (result));
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("blind_ev_sig", &collectable->ev_sig),
+ TALER_DB_RESULT_SPEC("denom_pub", &collectable->denom_pub),
+ TALER_DB_RESULT_SPEC("reserve_sig", &collectable->reserve_sig),
+ TALER_DB_RESULT_SPEC("reserve_pub", &collectable->reserve_pub),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_OK != TALER_DB_extract_result (result, rs, 0))
+ {
+ GNUNET_break (0);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ (void) memcpy (&collectable->ev, blind_ev, sizeof (struct TALER_RSA_BlindedSignaturePurpose));
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_insert_collectable_blindcoin (PGconn *db_conn,
+ const struct CollectableBlindcoin *collectable)
+{
+ PGresult *result;
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR (&collectable->ev),
+ TALER_DB_QUERY_PARAM_PTR (&collectable->ev_sig),
+ TALER_DB_QUERY_PARAM_PTR (&collectable->denom_pub),
+ TALER_DB_QUERY_PARAM_PTR (&collectable->reserve_pub),
+ TALER_DB_QUERY_PARAM_PTR (&collectable->reserve_sig),
+ TALER_DB_QUERY_PARAM_END
+ };
+ result = TALER_DB_exec_prepared (db_conn, "insert_collectable_blindcoins", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Query failed: %s\n", PQresultErrorMessage (result));
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 != strcmp ("1", PQcmdTuples (result)))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Insert failed (updated '%s' tupes instead of '1')\n",
+ PQcmdTuples (result));
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_get_reserve (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *reserve_pub,
+ struct Reserve *reserve)
+{
+ PGresult *result;
+ int res;
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR (reserve_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ result = TALER_DB_exec_prepared (db_conn, "get_reserve", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Query failed: %s\n", PQresultErrorMessage (result));
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ reserve->reserve_pub = *reserve_pub;
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("status_sig", &reserve->status_sig),
+ TALER_DB_RESULT_SPEC("status_sign_pub", &reserve->status_sign_pub),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ res = TALER_DB_extract_result (result, rs, 0);
+ if (GNUNET_SYSERR == res)
+ {
+ GNUNET_break (0);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ {
+ int fnums[] = {
+ PQfnumber (result, "balance_value"),
+ PQfnumber (result, "balance_fraction"),
+ PQfnumber (result, "balance_currency"),
+ };
+ if (GNUNET_OK != TALER_TALER_DB_extract_amount_nbo (result, 0, fnums, &reserve->balance))
+ {
+ GNUNET_break (0);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ }
+
+ /* FIXME: Add expiration?? */
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+/* If fresh is GNUNET_YES, set some fields to NULL as they are not actually valid */
+int
+TALER_MINT_DB_update_reserve (PGconn *db_conn,
+ const struct Reserve *reserve,
+ int fresh)
+{
+ PGresult *result;
+ uint64_t stamp_sec;
+
+ stamp_sec = GNUNET_ntohll (GNUNET_TIME_absolute_ntoh (reserve->expiration).abs_value_us / 1000000);
+
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR (&reserve->reserve_pub),
+ TALER_DB_QUERY_PARAM_PTR (&reserve->balance.value),
+ TALER_DB_QUERY_PARAM_PTR (&reserve->balance.fraction),
+ TALER_DB_QUERY_PARAM_PTR_SIZED (&reserve->balance.currency,
+ strlen (reserve->balance.currency)),
+ TALER_DB_QUERY_PARAM_PTR (&reserve->status_sig),
+ TALER_DB_QUERY_PARAM_PTR (&reserve->status_sign_pub),
+ TALER_DB_QUERY_PARAM_PTR (&stamp_sec),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ /* set some fields to NULL if they are not actually valid */
+
+ if (GNUNET_YES == fresh)
+ {
+ unsigned i;
+ for (i = 4; i <= 7; i += 1)
+ {
+ params[i].data = NULL;
+ params[i].size = 0;
+ }
+ }
+
+ result = TALER_DB_exec_prepared (db_conn, "update_reserve", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Query failed: %s\n", PQresultErrorMessage (result));
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 != strcmp ("1", PQcmdTuples (result)))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Update failed (updated '%s' tupes instead of '1')\n",
+ PQcmdTuples (result));
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+
+int
+TALER_MINT_DB_prepare (PGconn *db_conn)
+{
+ PGresult *result;
+
+ result = PQprepare (db_conn, "get_reserve",
+ "SELECT "
+ " balance_value, balance_fraction, balance_currency "
+ ",expiration_date, blind_session_pub, blind_session_priv"
+ ",status_sig, status_sign_pub "
+ "FROM reserves "
+ "WHERE reserve_pub=$1 "
+ "LIMIT 1; ",
+ 1, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "update_reserve",
+ "UPDATE reserves "
+ "SET"
+ " balance_value=$2 "
+ ",balance_fraction=$3 "
+ ",balance_currency=$4 "
+ ",status_sig=$5 "
+ ",status_sign_pub=$6 "
+ ",expiration_date=$7 "
+ "WHERE reserve_pub=$1 ",
+ 9, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+ result = PQprepare (db_conn, "insert_collectable_blindcoins",
+ "INSERT INTO collectable_blindcoins ( "
+ " blind_ev, blind_ev_sig "
+ ",denom_pub, reserve_pub, reserve_sig) "
+ "VALUES ($1, $2, $3, $4, $5)",
+ 6, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_collectable_blindcoins",
+ "SELECT "
+ "blind_ev_sig, denom_pub, reserve_sig, reserve_pub "
+ "FROM collectable_blindcoins "
+ "WHERE blind_ev = $1",
+ 1, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "insert_reserve_order",
+ "SELECT "
+ " blind_ev, blind_ev_sig, denom_pub, reserve_sig, reserve_pub "
+ "FROM collectable_blindcoins "
+ "WHERE blind_session_pub = $1",
+ 1, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ /* FIXME: does it make sense to store these computed values in the DB? */
+ result = PQprepare (db_conn, "get_refresh_session",
+ "SELECT "
+ " (SELECT count(*) FROM refresh_melt WHERE session_pub = $1)::INT2 as num_oldcoins "
+ ",(SELECT count(*) FROM refresh_blind_session_keys "
+ " WHERE session_pub = $1 and cnc_index = 0)::INT2 as num_newcoins "
+ ",(SELECT count(*) FROM refresh_blind_session_keys "
+ " WHERE session_pub = $1 and newcoin_index = 0)::INT2 as kappa "
+ ",noreveal_index"
+ ",session_commit_sig "
+ ",reveal_ok "
+ "FROM refresh_sessions "
+ "WHERE session_pub = $1",
+ 1, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_known_coin",
+ "SELECT "
+ " coin_pub, denom_pub, denom_sig "
+ ",expended_value, expended_fraction, expended_currency "
+ ",refresh_session_pub "
+ "FROM known_coins "
+ "WHERE coin_pub = $1",
+ 1, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "update_known_coin",
+ "UPDATE known_coins "
+ "SET "
+ " denom_pub = $2 "
+ ",denom_sig = $3 "
+ ",expended_value = $4 "
+ ",expended_fraction = $5 "
+ ",expended_currency = $6 "
+ ",refresh_session_pub = $7 "
+ "WHERE "
+ " coin_pub = $1 ",
+ 7, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "insert_known_coin",
+ "INSERT INTO known_coins ("
+ " coin_pub"
+ ",denom_pub"
+ ",denom_sig"
+ ",expended_value"
+ ",expended_fraction"
+ ",expended_currency"
+ ",refresh_session_pub"
+ ")"
+ "VALUES ($1,$2,$3,$4,$5,$6,$7)",
+ 7, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_refresh_commit_link",
+ "SELECT "
+ " transfer_pub "
+ ",link_secret_enc "
+ "FROM refresh_commit_link "
+ "WHERE session_pub = $1 AND cnc_index = $2 AND oldcoin_index = $3",
+ 3, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_refresh_commit_coin",
+ "SELECT "
+ " link_vector_enc "
+ ",coin_ev "
+ "FROM refresh_commit_coin "
+ "WHERE session_pub = $1 AND cnc_index = $2 AND newcoin_index = $3",
+ 3, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "insert_refresh_order",
+ "INSERT INTO refresh_order ( "
+ " newcoin_index "
+ ",session_pub "
+ ",denom_pub "
+ ") "
+ "VALUES ($1, $2, $3) ",
+ 3, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "insert_refresh_melt",
+ "INSERT INTO refresh_melt ( "
+ " session_pub "
+ ",oldcoin_index "
+ ",coin_pub "
+ ",denom_pub "
+ ") "
+ "VALUES ($1, $2, $3, $4) ",
+ 3, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_refresh_order",
+ "SELECT denom_pub "
+ "FROM refresh_order "
+ "WHERE session_pub = $1 AND newcoin_index = $2",
+ 2, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_refresh_collectable",
+ "SELECT ev_sig "
+ "FROM refresh_collectable "
+ "WHERE session_pub = $1 AND newcoin_index = $2",
+ 2, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_refresh_melt",
+ "SELECT coin_pub "
+ "FROM refresh_melt "
+ "WHERE session_pub = $1 AND oldcoin_index = $2",
+ 2, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "insert_refresh_session",
+ "INSERT INTO refresh_sessions ( "
+ " session_pub "
+ ",noreveal_index "
+ ") "
+ "VALUES ($1, $2) ",
+ 2, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "insert_refresh_commit_link",
+ "INSERT INTO refresh_commit_link ( "
+ " session_pub "
+ ",transfer_pub "
+ ",cnc_index "
+ ",oldcoin_index "
+ ",link_secret_enc "
+ ") "
+ "VALUES ($1, $2, $3, $4, $5) ",
+ 5, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "insert_refresh_commit_coin",
+ "INSERT INTO refresh_commit_coin ( "
+ " session_pub "
+ ",coin_ev "
+ ",cnc_index "
+ ",newcoin_index "
+ ",link_vector_enc "
+ ") "
+ "VALUES ($1, $2, $3, $4, $5) ",
+ 5, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "insert_refresh_collectable",
+ "INSERT INTO refresh_collectable ( "
+ " session_pub "
+ ",newcoin_index "
+ ",ev_sig "
+ ") "
+ "VALUES ($1, $2, $3) ",
+ 3, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "set_reveal_ok",
+ "UPDATE refresh_sessions "
+ "SET reveal_ok = TRUE "
+ "WHERE session_pub = $1 ",
+ 1, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_link",
+ "SELECT link_vector_enc, ro.denom_pub, ev_sig "
+ "FROM refresh_melt rm "
+ " JOIN refresh_order ro USING (session_pub) "
+ " JOIN refresh_commit_coin rcc USING (session_pub) "
+ " JOIN refresh_sessions rs USING (session_pub) "
+ " JOIN refresh_collectable rc USING (session_pub) "
+ "WHERE rm.coin_pub = $1 "
+ "AND ro.newcoin_index = rcc.newcoin_index "
+ "AND ro.newcoin_index = rc.newcoin_index "
+ "AND rcc.cnc_index = rs.noreveal_index % ( "
+ " SELECT count(*) FROM refresh_commit_coin rcc2 "
+ " WHERE rcc2.newcoin_index = 0 AND rcc2.session_pub = rs.session_pub "
+ " ) ",
+ 1, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_transfer",
+ "SELECT transfer_pub, link_secret_enc "
+ "FROM refresh_melt rm "
+ " JOIN refresh_commit_link rcl USING (session_pub) "
+ " JOIN refresh_sessions rs USING (session_pub) "
+ "WHERE rm.coin_pub = $1 "
+ "AND rm.oldcoin_index = rcl.oldcoin_index "
+ "AND rcl.cnc_index = rs.noreveal_index % ( "
+ " SELECT count(*) FROM refresh_commit_coin rcc2 "
+ " WHERE newcoin_index = 0 AND rcc2.session_pub = rm.session_pub "
+ " ) ",
+ 1, NULL);
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ if (GNUNET_OK != TALER_MINT_DB_prepare_deposits (db_conn))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Roll back the current transaction of a database connection.
+ *
+ * @param db_conn the database connection
+ * @return GNUNET_OK on success
+ */
+int
+TALER_MINT_DB_rollback (PGconn *db_conn)
+{
+ PGresult *result;
+
+ result = PQexec(db_conn, "ROLLBACK");
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ PQclear (result);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Roll back the current transaction of a database connection.
+ *
+ * @param db_conn the database connection
+ * @return GNUNET_OK on success
+ */
+int
+TALER_MINT_DB_commit (PGconn *db_conn)
+{
+ PGresult *result;
+
+ result = PQexec(db_conn, "COMMIT");
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ PQclear (result);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Start a transaction.
+ *
+ * @param db_conn the database connection
+ * @return GNUNET_OK on success
+ */
+int
+TALER_MINT_DB_transaction (PGconn *db_conn)
+{
+ PGresult *result;
+
+ result = PQexec(db_conn, "BEGIN");
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Can't start transaction: %s\n", PQresultErrorMessage (result));
+ PQclear (result);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Insert a refresh order into the database.
+ */
+int
+TALER_MINT_DB_insert_refresh_order (PGconn *db_conn,
+ uint16_t newcoin_index,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ const struct TALER_RSA_PublicKeyBinaryEncoded *denom_pub)
+{
+ uint16_t newcoin_index_nbo = htons (newcoin_index);
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(&newcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR(session_pub),
+ TALER_DB_QUERY_PARAM_PTR(denom_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "insert_refresh_order", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 != strcmp ("1", PQcmdTuples (result)))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_get_refresh_session (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
+ struct RefreshSession *session)
+{
+ int res;
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(refresh_session_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_refresh_session", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Query failed: %s\n", PQresultErrorMessage (result));
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ return GNUNET_NO;
+
+ GNUNET_assert (1 == PQntuples (result));
+
+ /* We're done if the caller is only interested in
+ * whether the session exists or not */
+
+ if (NULL == session)
+ return GNUNET_YES;
+
+ memset (session, 0, sizeof (struct RefreshSession));
+
+ session->session_pub = *refresh_session_pub;
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("num_oldcoins", &session->num_oldcoins),
+ TALER_DB_RESULT_SPEC("num_newcoins", &session->num_newcoins),
+ TALER_DB_RESULT_SPEC("kappa", &session->kappa),
+ TALER_DB_RESULT_SPEC("noreveal_index", &session->noreveal_index),
+ TALER_DB_RESULT_SPEC("reveal_ok", &session->reveal_ok),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ res = TALER_DB_extract_result (result, rs, 0);
+
+ if (GNUNET_OK != res)
+ {
+ GNUNET_break (0);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (TALER_DB_field_isnull (result, 0, "session_commit_sig"))
+ session->has_commit_sig = GNUNET_NO;
+ else
+ session->has_commit_sig = GNUNET_YES;
+
+ session->num_oldcoins = ntohs (session->num_oldcoins);
+ session->num_newcoins = ntohs (session->num_newcoins);
+ session->kappa = ntohs (session->kappa);
+ session->noreveal_index = ntohs (session->noreveal_index);
+
+ PQclear (result);
+ return GNUNET_YES;
+}
+
+
+int
+TALER_MINT_DB_get_known_coin (PGconn *db_conn, struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
+ struct KnownCoin *known_coin)
+{
+ int res;
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(coin_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_known_coin", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Query failed: %s\n", PQresultErrorMessage (result));
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ return GNUNET_NO;
+
+ GNUNET_assert (1 == PQntuples (result));
+
+ /* extract basic information about the known coin */
+
+ {
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("coin_pub", &known_coin->public_info.coin_pub),
+ TALER_DB_RESULT_SPEC("denom_pub", &known_coin->public_info.denom_pub),
+ TALER_DB_RESULT_SPEC("denom_sig", &known_coin->public_info.denom_sig),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_OK != (res = TALER_DB_extract_result (result, rs, 0)))
+ {
+ GNUNET_break (0);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ }
+
+ /* extract the expended amount of the coin */
+
+ if (GNUNET_OK != TALER_DB_extract_amount (result, 0,
+ "expended_value",
+ "expended_fraction",
+ "expended_currency",
+ &known_coin->expended_balance))
+ {
+ GNUNET_break (0);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ /* extract the refresh session of the coin or mark it as missing */
+
+ {
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("refresh_session_pub", &known_coin->refresh_session_pub),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_SYSERR == (res = TALER_DB_extract_result (result, rs, 0)))
+ {
+ GNUNET_break (0);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_NO == res)
+ {
+ known_coin->is_refreshed = GNUNET_NO;
+ memset (&known_coin->refresh_session_pub, 0, sizeof (struct GNUNET_CRYPTO_EddsaPublicKey));
+ }
+ else
+ {
+ known_coin->is_refreshed = GNUNET_YES;
+ }
+ }
+
+ PQclear (result);
+ return GNUNET_YES;
+}
+
+
+int
+TALER_MINT_DB_create_refresh_session (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub)
+{
+ uint16_t noreveal_index;
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&noreveal_index),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ noreveal_index = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1<<15);
+ noreveal_index = htonl (noreveal_index);
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "insert_refresh_session", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_set_commit_signature (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ const struct GNUNET_CRYPTO_EddsaSignature *commit_sig)
+{
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+}
+
+
+int
+TALER_MINT_DB_set_reveal_ok (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub)
+{
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(session_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "set_reveal_ok", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 != strcmp ("1", PQcmdTuples (result)))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_update_known_coin (PGconn *db_conn,
+ const struct KnownCoin *known_coin)
+{
+ struct TALER_AmountNBO expended_nbo = TALER_amount_hton (known_coin->expended_balance);
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(&known_coin->public_info.coin_pub),
+ TALER_DB_QUERY_PARAM_PTR(&known_coin->public_info.denom_pub),
+ TALER_DB_QUERY_PARAM_PTR(&known_coin->public_info.denom_sig),
+ TALER_DB_QUERY_PARAM_PTR(&expended_nbo.value),
+ TALER_DB_QUERY_PARAM_PTR(&expended_nbo.fraction),
+ TALER_DB_QUERY_PARAM_PTR_SIZED(expended_nbo.currency, strlen (expended_nbo.currency)),
+ TALER_DB_QUERY_PARAM_PTR(&known_coin->refresh_session_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ if (GNUNET_NO == known_coin->is_refreshed)
+ {
+ // Mind the magic index!
+ params[6].data = NULL;
+ params[6].size = 0;
+ }
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "update_known_coin", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 != strcmp ("1", PQcmdTuples (result)))
+ {
+ PQclear (result);
+ // return 'no' here (don't fail) so that we can
+ // insert if update fails (=> "upsert")
+ return GNUNET_NO;
+ }
+
+ PQclear (result);
+ return GNUNET_YES;
+}
+
+int
+TALER_MINT_DB_insert_known_coin (PGconn *db_conn,
+ const struct KnownCoin *known_coin)
+{
+ struct TALER_AmountNBO expended_nbo = TALER_amount_hton (known_coin->expended_balance);
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(&known_coin->public_info.coin_pub),
+ TALER_DB_QUERY_PARAM_PTR(&known_coin->public_info.denom_pub),
+ TALER_DB_QUERY_PARAM_PTR(&known_coin->public_info.denom_sig),
+ TALER_DB_QUERY_PARAM_PTR(&expended_nbo.value),
+ TALER_DB_QUERY_PARAM_PTR(&expended_nbo.fraction),
+ TALER_DB_QUERY_PARAM_PTR_SIZED(&expended_nbo.currency, strlen (expended_nbo.currency)),
+ TALER_DB_QUERY_PARAM_PTR(&known_coin->refresh_session_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ if (GNUNET_NO == known_coin->is_refreshed)
+ {
+ // Mind the magic index!
+ params[6].data = NULL;
+ params[6].size = 0;
+ }
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "insert_known_coin", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 != strcmp ("1", PQcmdTuples (result)))
+ {
+ PQclear (result);
+ // return 'no' here (don't fail) so that we can
+ // update if insert fails (=> "upsert")
+ return GNUNET_NO;
+ }
+
+ PQclear (result);
+ return GNUNET_YES;
+}
+
+
+int
+TALER_MINT_DB_upsert_known_coin (PGconn *db_conn, struct KnownCoin *known_coin)
+{
+ int ret;
+ ret = TALER_MINT_DB_update_known_coin (db_conn, known_coin);
+ if (GNUNET_SYSERR == ret)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_YES == ret)
+ return GNUNET_YES;
+ return TALER_MINT_DB_insert_known_coin (db_conn, known_coin);
+}
+
+
+int
+TALER_MINT_DB_insert_refresh_commit_link (PGconn *db_conn, struct RefreshCommitLink *commit_link)
+{
+ uint16_t cnc_index_nbo = htons (commit_link->cnc_index);
+ uint16_t oldcoin_index_nbo = htons (commit_link->oldcoin_index);
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(&commit_link->session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&commit_link->transfer_pub),
+ TALER_DB_QUERY_PARAM_PTR(&cnc_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR(&oldcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR_SIZED(&commit_link->shared_secret_enc, sizeof (struct GNUNET_HashCode)),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "insert_refresh_commit_link", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 != strcmp ("1", PQcmdTuples (result)))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_insert_refresh_commit_coin (PGconn *db_conn, struct RefreshCommitCoin *commit_coin)
+{
+ uint16_t cnc_index_nbo = htons (commit_coin->cnc_index);
+ uint16_t newcoin_index_nbo = htons (commit_coin->newcoin_index);
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(&commit_coin->session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&commit_coin->coin_ev),
+ TALER_DB_QUERY_PARAM_PTR(&cnc_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR(&newcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR_SIZED(&commit_coin->link_enc, sizeof (struct LinkData)),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "insert_refresh_commit_coin", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 != strcmp ("1", PQcmdTuples (result)))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_get_refresh_commit_link (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
+ int cnc_index, int oldcoin_index,
+ struct RefreshCommitLink *cc)
+{
+ uint16_t cnc_index_nbo = htons (cnc_index);
+ uint16_t oldcoin_index_nbo = htons (oldcoin_index);
+
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(refresh_session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&cnc_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR(&oldcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ cc->cnc_index = cnc_index;
+ cc->oldcoin_index = oldcoin_index;
+ cc->session_pub = *refresh_session_pub;
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_refresh_commit_link", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("transfer_pub", &cc->transfer_pub),
+ TALER_DB_RESULT_SPEC_SIZED("link_secret_enc", &cc->shared_secret_enc,
+ TALER_REFRESH_SHARED_SECRET_LENGTH),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_YES != TALER_DB_extract_result (result, rs, 0))
+ {
+ PQclear (result);
+ GNUNET_free (cc);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_YES;
+}
+
+
+int
+TALER_MINT_DB_get_refresh_commit_coin (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
+ int cnc_index, int newcoin_index,
+ struct RefreshCommitCoin *cc)
+{
+ uint16_t cnc_index_nbo = htons (cnc_index);
+ uint16_t newcoin_index_nbo = htons (newcoin_index);
+
+ cc->cnc_index = cnc_index;
+ cc->newcoin_index = newcoin_index;
+ cc->session_pub = *refresh_session_pub;
+
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(refresh_session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&cnc_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR(&newcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_refresh_commit_coin", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("coin_ev", &cc->coin_ev),
+ TALER_DB_RESULT_SPEC_SIZED("link_vector_enc", &cc->link_enc,
+ TALER_REFRESH_LINK_LENGTH),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_YES != TALER_DB_extract_result (result, rs, 0))
+ {
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_YES;
+}
+
+
+int
+TALER_MINT_DB_get_refresh_order (PGconn *db_conn,
+ uint16_t newcoin_index,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ struct TALER_RSA_PublicKeyBinaryEncoded *denom_pub)
+{
+ uint16_t newcoin_index_nbo = htons (newcoin_index);
+
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&newcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_refresh_order", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ GNUNET_assert (1 == PQntuples (result));
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("denom_pub", denom_pub),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_OK != TALER_DB_extract_result (result, rs, 0))
+ {
+ PQclear (result);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_insert_refresh_collectable (PGconn *db_conn,
+ uint16_t newcoin_index,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ const struct TALER_RSA_Signature *ev_sig)
+{
+ uint16_t newcoin_index_nbo = htons (newcoin_index);
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&newcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR(ev_sig),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "insert_refresh_collectable", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_get_refresh_collectable (PGconn *db_conn,
+ uint16_t newcoin_index,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ struct TALER_RSA_Signature *ev_sig)
+{
+
+ uint16_t newcoin_index_nbo = htons (newcoin_index);
+
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&newcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_refresh_collectable", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ GNUNET_assert (1 == PQntuples (result));
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("ev_sig", ev_sig),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_OK != TALER_DB_extract_result (result, rs, 0))
+ {
+ PQclear (result);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+
+int
+TALER_MINT_DB_insert_refresh_melt (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ uint16_t oldcoin_index,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
+ const struct TALER_RSA_PublicKeyBinaryEncoded *denom_pub)
+{
+ uint16_t oldcoin_index_nbo = htons (oldcoin_index);
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&oldcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_PTR(coin_pub),
+ TALER_DB_QUERY_PARAM_PTR(denom_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "insert_refresh_melt", params);
+
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+
+int
+TALER_MINT_DB_get_refresh_melt (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ uint16_t oldcoin_index,
+ struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub)
+{
+ uint16_t oldcoin_index_nbo = htons (oldcoin_index);
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(session_pub),
+ TALER_DB_QUERY_PARAM_PTR(&oldcoin_index_nbo),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_refresh_melt", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ GNUNET_assert (1 == PQntuples (result));
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("coin_pub", coin_pub),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_OK != TALER_DB_extract_result (result, rs, 0))
+ {
+ PQclear (result);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_db_get_link (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
+ LinkIterator link_iter,
+ void *cls)
+{
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(coin_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_link", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+
+ int i = 0;
+ int res;
+
+ for (i = 0; i < PQntuples (result); i++)
+ {
+ struct LinkDataEnc link_data_enc;
+ struct TALER_RSA_PublicKeyBinaryEncoded denom_pub;
+ struct TALER_RSA_Signature ev_sig;
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("link_vector_enc", &link_data_enc),
+ TALER_DB_RESULT_SPEC("denom_pub", &denom_pub),
+ TALER_DB_RESULT_SPEC("ev_sig", &ev_sig),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_OK != TALER_DB_extract_result (result, rs, i))
+ {
+ PQclear (result);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ if (GNUNET_OK != (res = link_iter (cls, &link_data_enc, &denom_pub, &ev_sig)))
+ {
+ GNUNET_assert (GNUNET_SYSERR != res);
+ PQclear (result);
+ return res;
+ }
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_db_get_transfer (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
+ struct GNUNET_CRYPTO_EcdsaPublicKey *transfer_pub,
+ struct SharedSecretEnc *shared_secret_enc)
+{
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR(coin_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+
+ PGresult *result = TALER_DB_exec_prepared (db_conn, "get_transfer", params);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ if (1 != PQntuples (result))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "got %d tuples for get_transfer\n", PQntuples (result));
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC("transfer_pub", transfer_pub),
+ TALER_DB_RESULT_SPEC("link_secret_enc", shared_secret_enc),
+ TALER_DB_RESULT_SPEC_END
+ };
+
+ if (GNUNET_OK != TALER_DB_extract_result (result, rs, 0))
+ {
+ PQclear (result);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_DB_init_deposits (PGconn *conn, int tmp)
+{
+ const char *tmp_str = (1 == tmp) ? "TEMPORARY" : "";
+ char *sql;
+ PGresult *res;
+ int ret;
+
+ res = NULL;
+ (void) GNUNET_asprintf (&sql,
+ "CREATE %1$s TABLE IF NOT EXISTS deposits ("
+ " coin_pub BYTEA NOT NULL PRIMARY KEY CHECK (length(coin_pub)=32)"
+ ",denom_pub BYTEA NOT NULL CHECK (length(denom_pub)=32)"
+ ",transaction_id INT8 NOT NULL"
+ ",amount_value INT4 NOT NULL"
+ ",amount_fraction INT4 NOT NULL"
+ ",amount_currency VARCHAR(4) NOT NULL"
+ ",merchant_pub BYTEA NOT NULL"
+ ",h_contract BYTEA NOT NULL CHECK (length(h_contract)=64)"
+ ",h_wire BYTEA NOT NULL CHECK (length(h_wire)=64)"
+ ",coin_sig BYTEA NOT NULL CHECK (length(coin_sig)=64)"
+ ",wire TEXT NOT NULL"
+ ")",
+ tmp_str);
+ res = PQexec (conn, sql);
+ GNUNET_free (sql);
+ if (PGRES_COMMAND_OK != PQresultStatus (res))
+ {
+ break_db_err (res);
+ ret = GNUNET_SYSERR;
+ }
+ else
+ ret = GNUNET_OK;
+ PQclear (res);
+ return ret;
+}
+
+int
+TALER_MINT_DB_prepare_deposits (PGconn *db_conn)
+{
+ PGresult *result;
+
+ result = PQprepare (db_conn, "insert_deposit",
+ "INSERT INTO deposits ("
+ "coin_pub,"
+ "denom_pub,"
+ "transaction_id,"
+ "amount_value,"
+ "amount_fraction,"
+ "amount_currency,"
+ "merchant_pub,"
+ "h_contract,"
+ "h_wire,"
+ "coin_sig,"
+ "wire"
+ ") VALUES ("
+ "$1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11"
+ ")",
+ 11, NULL);
+ EXITIF (PGRES_COMMAND_OK != PQresultStatus(result));
+ PQclear (result);
+
+ result = PQprepare (db_conn, "get_deposit",
+ "SELECT "
+ "coin_pub,"
+ "denom_pub,"
+ "transaction_id,"
+ "amount_value,"
+ "amount_fraction,"
+ "amount_currency,"
+ "merchant_pub,"
+ "h_contract,"
+ "h_wire,"
+ "coin_sig"
+ " FROM deposits WHERE ("
+ "coin_pub = $1"
+ ")",
+ 1, NULL);
+ EXITIF (PGRES_COMMAND_OK != PQresultStatus(result));
+ PQclear (result);
+
+ return GNUNET_OK;
+
+ EXITIF_exit:
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+}
+
+
+int
+TALER_MINT_DB_insert_deposit (PGconn *db_conn,
+ const struct Deposit *deposit)
+{
+ struct TALER_DB_QueryParam params[]= {
+ TALER_DB_QUERY_PARAM_PTR (&deposit->coin_pub),
+ TALER_DB_QUERY_PARAM_PTR (&deposit->denom_pub),
+ TALER_DB_QUERY_PARAM_PTR (&deposit->transaction_id),
+ TALER_DB_QUERY_PARAM_PTR (&deposit->amount.value),
+ TALER_DB_QUERY_PARAM_PTR (&deposit->amount.fraction),
+ TALER_DB_QUERY_PARAM_PTR_SIZED (deposit->amount.currency, strlen (deposit->amount.currency)),
+ TALER_DB_QUERY_PARAM_PTR (&deposit->merchant_pub),
+ TALER_DB_QUERY_PARAM_PTR (&deposit->h_contract),
+ TALER_DB_QUERY_PARAM_PTR (&deposit->h_wire),
+ TALER_DB_QUERY_PARAM_PTR (&deposit->coin_sig),
+ TALER_DB_QUERY_PARAM_PTR_SIZED (deposit->wire, strlen(deposit->wire)),
+ TALER_DB_QUERY_PARAM_END
+ };
+ PGresult *result;
+
+ result = TALER_DB_exec_prepared (db_conn, "insert_deposit", params);
+ if (PGRES_COMMAND_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ PQclear (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+ return GNUNET_OK;
+}
+
+int
+TALER_MINT_DB_get_deposit (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *coin_pub,
+ struct Deposit **r_deposit)
+{
+ struct TALER_DB_QueryParam params[] = {
+ TALER_DB_QUERY_PARAM_PTR (coin_pub),
+ TALER_DB_QUERY_PARAM_END
+ };
+ PGresult *result;
+ struct Deposit *deposit;
+
+ deposit = NULL;
+ result = TALER_DB_exec_prepared (db_conn, "get_deposit", params);
+ if (PGRES_TUPLES_OK != PQresultStatus (result))
+ {
+ break_db_err (result);
+ goto EXITIF_exit;
+ }
+
+ if (0 == PQntuples (result))
+ {
+ PQclear (result);
+ return GNUNET_NO;
+ }
+
+ if (1 != PQntuples (result))
+ {
+ GNUNET_break (0);
+ goto EXITIF_exit;
+ }
+
+ {
+ deposit = GNUNET_malloc (sizeof (struct Deposit)); /* Without wire data */
+ struct TALER_DB_ResultSpec rs[] = {
+ TALER_DB_RESULT_SPEC ("coin_pub", &deposit->coin_pub),
+ TALER_DB_RESULT_SPEC ("denom_pub", &deposit->denom_pub),
+ TALER_DB_RESULT_SPEC ("coin_sig", &deposit->coin_sig),
+ TALER_DB_RESULT_SPEC ("transaction_id", &deposit->transaction_id),
+ TALER_DB_RESULT_SPEC ("merchant_pub", &deposit->merchant_pub),
+ TALER_DB_RESULT_SPEC ("h_contract", &deposit->h_contract),
+ TALER_DB_RESULT_SPEC ("h_wire", &deposit->h_wire),
+ TALER_DB_RESULT_SPEC_END
+ };
+ EXITIF (GNUNET_OK != TALER_DB_extract_result (result, rs, 0));
+ EXITIF (GNUNET_OK != TALER_DB_extract_amount_nbo (result, 0,
+ "amount_value",
+ "amount_fraction",
+ "amount_currency",
+ &deposit->amount));
+ deposit->purpose.purpose = htonl (TALER_SIGNATURE_DEPOSIT);
+ deposit->purpose.size = htonl (sizeof (struct Deposit)
+ - offsetof (struct Deposit, purpose));
+ }
+
+ PQclear (result);
+ *r_deposit = deposit;
+ return GNUNET_OK;
+
+EXITIF_exit:
+ PQclear (result);
+ GNUNET_free_non_null (deposit);
+ deposit = NULL;
+ return GNUNET_SYSERR;
+}
+
+
+
+/**
+ * Get the thread-local database-handle.
+ * Connect to the db if the connection does not exist yet.
+ *
+ * @param the database connection, or NULL on error
+ */
+PGconn *
+TALER_MINT_DB_get_connection (void)
+{
+ PGconn *db_conn;
+
+ if (NULL != (db_conn = pthread_getspecific (db_conn_threadlocal)))
+ return db_conn;
+
+ db_conn = PQconnectdb (TALER_MINT_db_connection_cfg_str);
+
+ if (CONNECTION_OK != PQstatus (db_conn))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "db connection failed: %s\n",
+ PQerrorMessage (db_conn));
+ GNUNET_break (0);
+ return NULL;
+ }
+
+ if (GNUNET_OK != TALER_MINT_DB_prepare (db_conn))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ if (0 != pthread_setspecific (db_conn_threadlocal, db_conn))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ return db_conn;
+}
+
+
+/**
+ * Close thread-local database connection when a thread is destroyed.
+ *
+ * @param closure we get from pthreads (the db handle)
+ */
+static void
+db_conn_destroy (void *cls)
+{
+ PGconn *db_conn = cls;
+ if (NULL != db_conn)
+ PQfinish (db_conn);
+}
+
+
+/**
+ * Initialize database subsystem.
+ *
+ * @param connection_cfg configuration to use to talk to DB
+ * @return GNUNET_OK on success
+ */
+int
+TALER_MINT_DB_init (const char *connection_cfg)
+{
+
+ if (0 != pthread_key_create (&db_conn_threadlocal, &db_conn_destroy))
+ {
+ fprintf (stderr,
+ "Can't create pthread key.\n");
+ return GNUNET_SYSERR;
+ }
+ TALER_MINT_db_connection_cfg_str = GNUNET_strdup (connection_cfg);
+ return GNUNET_OK;
+}
diff --git a/src/mint/mint_db.h b/src/mint/mint_db.h
new file mode 100644
index 00000000..4f47aac1
--- /dev/null
+++ b/src/mint/mint_db.h
@@ -0,0 +1,344 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file mint/mint_db.h
+ * @brief Mint-specific database access
+ * @author Florian Dold
+ */
+
+#ifndef _NEURO_MINT_DB_H
+#define _NEURO_MINT_DB_H
+
+#include <libpq-fe.h>
+#include <gnunet/gnunet_util_lib.h>
+#include "taler_util.h"
+#include "taler_types.h"
+#include "taler_rsa.h"
+
+
+/**
+ * Reserve row. Corresponds to table 'reserves' in
+ * the mint's database.
+ */
+struct Reserve
+{
+ /**
+ * Signature over the purse.
+ * Only valid if (blind_session_missing==GNUNET_YES).
+ */
+ struct GNUNET_CRYPTO_EddsaSignature status_sig;
+ /**
+ * Signature with purpose TALER_SIGNATURE_PURSE.
+ * Only valid if (blind_session_missing==GNUNET_YES).
+ */
+ struct GNUNET_CRYPTO_EccSignaturePurpose status_sig_purpose;
+ /**
+ * Signing key used to sign the purse.
+ * Only valid if (blind_session_missing==GNUNET_YES).
+ */
+ struct GNUNET_CRYPTO_EddsaPublicKey status_sign_pub;
+ /**
+ * Withdraw public key, identifies the purse.
+ * Only the customer knows the corresponding private key.
+ */
+ struct GNUNET_CRYPTO_EddsaPublicKey reserve_pub;
+ /**
+ * Remaining balance in the purse.
+ */
+ struct TALER_AmountNBO balance;
+
+ /**
+ * Expiration date for the purse.
+ */
+ struct GNUNET_TIME_AbsoluteNBO expiration;
+};
+
+
+struct CollectableBlindcoin
+{
+ struct TALER_RSA_BlindedSignaturePurpose ev;
+ struct TALER_RSA_Signature ev_sig;
+ struct TALER_RSA_PublicKeyBinaryEncoded denom_pub;
+ struct GNUNET_CRYPTO_EddsaPublicKey reserve_pub;
+ struct GNUNET_CRYPTO_EddsaSignature reserve_sig;
+};
+
+
+struct RefreshSession
+{
+ int has_commit_sig;
+ struct GNUNET_CRYPTO_EddsaSignature commit_sig;
+ struct GNUNET_CRYPTO_EddsaPublicKey session_pub;
+ uint16_t num_oldcoins;
+ uint16_t num_newcoins;
+ uint16_t kappa;
+ uint16_t noreveal_index;
+ uint8_t reveal_ok;
+};
+
+
+#define TALER_REFRESH_SHARED_SECRET_LENGTH (sizeof (struct GNUNET_HashCode))
+#define TALER_REFRESH_LINK_LENGTH (sizeof (struct LinkData))
+
+struct RefreshCommitLink
+{
+ struct GNUNET_CRYPTO_EddsaPublicKey session_pub;
+ struct GNUNET_CRYPTO_EcdsaPublicKey transfer_pub;
+ uint16_t cnc_index;
+ uint16_t oldcoin_index;
+ char shared_secret_enc[sizeof (struct GNUNET_HashCode)];
+};
+
+struct LinkData
+{
+ struct GNUNET_CRYPTO_EcdsaPrivateKey coin_priv;
+ struct TALER_RSA_BlindingKeyBinaryEncoded bkey_enc;
+};
+
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+struct SharedSecretEnc
+{
+ char data[TALER_REFRESH_SHARED_SECRET_LENGTH];
+};
+
+
+struct LinkDataEnc
+{
+ char data[sizeof (struct LinkData)];
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+struct RefreshCommitCoin
+{
+ struct GNUNET_CRYPTO_EddsaPublicKey session_pub;
+ struct TALER_RSA_BlindedSignaturePurpose coin_ev;
+ uint16_t cnc_index;
+ uint16_t newcoin_index;
+ char link_enc[sizeof (struct LinkData)];
+};
+
+
+struct KnownCoin
+{
+ struct TALER_CoinPublicInfo public_info;
+ struct TALER_Amount expended_balance;
+ int is_refreshed;
+ /**
+ * Refreshing session, only valid if
+ * is_refreshed==1.
+ */
+ struct GNUNET_CRYPTO_EddsaPublicKey refresh_session_pub;
+};
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+struct Deposit
+{
+ /* FIXME: should be TALER_CoinPublicInfo */
+ struct GNUNET_CRYPTO_EddsaPublicKey coin_pub;
+ struct TALER_RSA_PublicKeyBinaryEncoded denom_pub;
+ struct TALER_RSA_Signature coin_sig;
+ struct TALER_RSA_SignaturePurpose purpose;
+ uint64_t transaction_id;
+ struct TALER_AmountNBO amount;
+ struct GNUNET_CRYPTO_EddsaPublicKey merchant_pub;
+ struct GNUNET_HashCode h_contract;
+ struct GNUNET_HashCode h_wire;
+ /* TODO: uint16_t wire_size */
+ char wire[]; /* string encoded wire JSON object */
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+int
+TALER_MINT_DB_prepare (PGconn *db_conn);
+
+int
+TALER_MINT_DB_get_collectable_blindcoin (PGconn *db_conn,
+ struct TALER_RSA_BlindedSignaturePurpose *blind_ev,
+ struct CollectableBlindcoin *collectable);
+
+int
+TALER_MINT_DB_insert_collectable_blindcoin (PGconn *db_conn,
+ const struct CollectableBlindcoin *collectable);
+
+
+int
+TALER_MINT_DB_rollback (PGconn *db_conn);
+
+
+int
+TALER_MINT_DB_transaction (PGconn *db_conn);
+
+
+int
+TALER_MINT_DB_commit (PGconn *db_conn);
+
+
+int
+TALER_MINT_DB_get_reserve (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *reserve_pub,
+ struct Reserve *reserve_res);
+
+int
+TALER_MINT_DB_update_reserve (PGconn *db_conn,
+ const struct Reserve *reserve,
+ int fresh);
+
+
+int
+TALER_MINT_DB_insert_refresh_order (PGconn *db_conn,
+ uint16_t newcoin_index,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ const struct TALER_RSA_PublicKeyBinaryEncoded *denom_pub);
+
+int
+TALER_MINT_DB_get_refresh_session (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
+ struct RefreshSession *r_session);
+
+
+int
+TALER_MINT_DB_get_known_coin (PGconn *db_conn, struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
+ struct KnownCoin *known_coin);
+
+
+int
+TALER_MINT_DB_upsert_known_coin (PGconn *db_conn, struct KnownCoin *known_coin);
+
+
+int
+TALER_MINT_DB_insert_refresh_commit_link (PGconn *db_conn, struct RefreshCommitLink *commit_link);
+
+int
+TALER_MINT_DB_insert_refresh_commit_coin (PGconn *db_conn, struct RefreshCommitCoin *commit_coin);
+
+
+int
+TALER_MINT_DB_get_refresh_commit_link (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
+ int i, int j,
+ struct RefreshCommitLink *commit_link);
+
+
+int
+TALER_MINT_DB_get_refresh_commit_coin (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
+ int i, int j,
+ struct RefreshCommitCoin *commit_coin);
+
+
+int
+TALER_MINT_DB_create_refresh_session (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey
+ *session_pub);
+
+
+int
+TALER_MINT_DB_get_refresh_order (PGconn *db_conn,
+ uint16_t newcoin_index,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ struct TALER_RSA_PublicKeyBinaryEncoded *denom_pub);
+
+
+int
+TALER_MINT_DB_insert_refresh_collectable (PGconn *db_conn,
+ uint16_t newcoin_index,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ const struct TALER_RSA_Signature *ev_sig);
+int
+TALER_MINT_DB_get_refresh_collectable (PGconn *db_conn,
+ uint16_t newcoin_index,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ struct TALER_RSA_Signature *ev_sig);
+int
+TALER_MINT_DB_set_reveal_ok (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub);
+
+int
+TALER_MINT_DB_insert_refresh_melt (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ uint16_t oldcoin_index,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
+ const struct TALER_RSA_PublicKeyBinaryEncoded *denom_pub);
+
+
+int
+TALER_MINT_DB_get_refresh_melt (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
+ uint16_t oldcoin_index,
+ struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub);
+
+
+typedef
+int (*LinkIterator) (void *cls,
+ const struct LinkDataEnc *link_data_enc,
+ const struct TALER_RSA_PublicKeyBinaryEncoded *denom_pub,
+ const struct TALER_RSA_Signature *ev_sig);
+
+int
+TALER_db_get_link (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
+ LinkIterator link_iter,
+ void *cls);
+
+
+int
+TALER_db_get_transfer (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
+ struct GNUNET_CRYPTO_EcdsaPublicKey *transfer_pub,
+ struct SharedSecretEnc *shared_secret_enc);
+
+int
+TALER_MINT_DB_init_deposits (PGconn *db_conn, int temporary);
+
+int
+TALER_MINT_DB_prepare_deposits (PGconn *db_conn);
+
+int
+TALER_MINT_DB_insert_deposit (PGconn *db_conn,
+ const struct Deposit *deposit);
+
+int
+TALER_MINT_DB_get_deposit (PGconn *db_conn,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *coin_pub,
+ struct Deposit **r_deposit);
+int
+TALER_MINT_DB_insert_known_coin (PGconn *db_conn,
+ const struct KnownCoin *known_coin);
+
+
+
+/**
+ * Get the thread-local database-handle.
+ * Connect to the db if the connection does not exist yet.
+ *
+ * @param the database connection, or NULL on error
+ */
+PGconn *
+TALER_MINT_DB_get_connection (void);
+
+
+int
+TALER_MINT_DB_init (const char *connection_cfg);
+
+
+
+#endif /* _NEURO_MINT_DB_H */
diff --git a/src/mint/taler-mint-dbinit.c b/src/mint/taler-mint-dbinit.c
new file mode 100644
index 00000000..d877f62c
--- /dev/null
+++ b/src/mint/taler-mint-dbinit.c
@@ -0,0 +1,285 @@
+/*
+ This file is part of TALER
+ (C) 2014 Christian Grothoff (and other contributing authors)
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file taler-mint-dbinit.c
+ * @brief Create tables for the mint database.
+ * @author Florian Dold
+ */
+
+#include "platform.h"
+#include <gnunet/gnunet_util_lib.h>
+#include <libpq-fe.h>
+#include "mint.h"
+
+
+#define break_db_err(result) do { \
+ GNUNET_break(0); \
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Database failure: %s\n", PQresultErrorMessage (result)); \
+ PQclear (result); \
+ } while (0)
+
+
+static char *mint_base_dir;
+static struct GNUNET_CONFIGURATION_Handle *cfg;
+static PGconn *db_conn;
+static char *TALER_MINT_db_connection_cfg_str;
+
+
+int
+TALER_MINT_init_withdraw_tables (PGconn *conn)
+{
+ PGresult *result;
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS reserves"
+ "("
+ " reserve_pub BYTEA PRIMARY KEY"
+ ",balance_value INT4 NOT NULL"
+ ",balance_fraction INT4 NOT NULL"
+ ",balance_currency VARCHAR(4) NOT NULL"
+ ",status_sig BYTEA"
+ ",status_sign_pub BYTEA"
+ ",expiration_date INT8 NOT NULL"
+ ")");
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS collectable_blindcoins"
+ "("
+ "blind_ev BYTEA PRIMARY KEY"
+ ",blind_ev_sig BYTEA NOT NULL"
+ ",denom_pub BYTEA NOT NULL"
+ ",reserve_sig BYTEA NOT NULL"
+ ",reserve_pub BYTEA NOT NULL REFERENCES reserves (reserve_pub)"
+ ")");
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS known_coins "
+ "("
+ " coin_pub BYTEA NOT NULL PRIMARY KEY"
+ ",denom_pub BYTEA NOT NULL"
+ ",denom_sig BYTEA NOT NULL"
+ ",expended_value INT4 NOT NULL"
+ ",expended_fraction INT4 NOT NULL"
+ ",expended_currency VARCHAR(4) NOT NULL"
+ ",refresh_session_pub BYTEA"
+ ")");
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS refresh_sessions "
+ "("
+ " session_pub BYTEA PRIMARY KEY CHECK (length(session_pub) = 32)"
+ ",session_melt_sig BYTEA"
+ ",session_commit_sig BYTEA"
+ ",noreveal_index INT2 NOT NULL"
+ // non-zero if all reveals were ok
+ // and the new coin signatures are ready
+ ",reveal_ok BOOLEAN NOT NULL DEFAULT false"
+ ") ");
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS refresh_order "
+ "( "
+ " session_pub BYTEA NOT NULL REFERENCES refresh_sessions (session_pub)"
+ ",newcoin_index INT2 NOT NULL "
+ ",denom_pub BYTEA NOT NULL "
+ ",PRIMARY KEY (session_pub, newcoin_index)"
+ ") ");
+
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS refresh_commit_link"
+ "("
+ " session_pub BYTEA NOT NULL REFERENCES refresh_sessions (session_pub)"
+ ",transfer_pub BYTEA NOT NULL"
+ ",link_secret_enc BYTEA NOT NULL"
+ // index of the old coin in the customer's request
+ ",oldcoin_index INT2 NOT NULL"
+ // index for cut and choose,
+ // ranges from 0 to kappa-1
+ ",cnc_index INT2 NOT NULL"
+ ")");
+
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS refresh_commit_coin"
+ "("
+ " session_pub BYTEA NOT NULL REFERENCES refresh_sessions (session_pub) "
+ ",link_vector_enc BYTEA NOT NULL"
+ // index of the new coin in the customer's request
+ ",newcoin_index INT2 NOT NULL"
+ // index for cut and choose,
+ ",cnc_index INT2 NOT NULL"
+ ",coin_ev BYTEA NOT NULL"
+ ")");
+
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS refresh_melt"
+ "("
+ " session_pub BYTEA NOT NULL REFERENCES refresh_sessions (session_pub) "
+ ",coin_pub BYTEA NOT NULL REFERENCES known_coins (coin_pub) "
+ ",denom_pub BYTEA NOT NULL "
+ ",oldcoin_index INT2 NOT NULL"
+ ")");
+
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS refresh_collectable"
+ "("
+ " session_pub BYTEA NOT NULL REFERENCES refresh_sessions (session_pub) "
+ ",ev_sig BYTEA NOT NULL"
+ ",newcoin_index INT2 NOT NULL"
+ ")");
+
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ result = PQexec (conn,
+ "CREATE TABLE IF NOT EXISTS deposits "
+ "( "
+ " coin_pub BYTEA NOT NULL PRIMARY KEY CHECK (length(coin_pub)=32)"
+ ",denom_pub BYTEA NOT NULL CHECK (length(denom_pub)=32)"
+ ",transaction_id INT8 NOT NULL"
+ ",amount_currency VARCHAR(4) NOT NULL"
+ ",amount_value INT4 NOT NULL"
+ ",amount_fraction INT4 NOT NULL"
+ ",merchant_pub BYTEA NOT NULL"
+ ",h_contract BYTEA NOT NULL CHECK (length(h_contract)=64)"
+ ",h_wire BYTEA NOT NULL CHECK (length(h_wire)=64)"
+ ",coin_sig BYTEA NOT NULL CHECK (length(coin_sig)=64)"
+ ",wire TEXT NOT NULL"
+ ")");
+
+ if (PGRES_COMMAND_OK != PQresultStatus(result))
+ {
+ break_db_err (result);
+ return GNUNET_SYSERR;
+ }
+ PQclear (result);
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * The main function of the serve tool
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char *const *argv)
+{
+ static const struct GNUNET_GETOPT_CommandLineOption options[] = {
+ GNUNET_GETOPT_OPTION_HELP ("gnunet-mint-keyup OPTIONS"),
+ {'d', "mint-dir", "DIR",
+ "mint directory", 1,
+ &GNUNET_GETOPT_set_filename, &mint_base_dir},
+ GNUNET_GETOPT_OPTION_END
+ };
+
+ if (GNUNET_GETOPT_run ("taler-mint-serve", options, argc, argv) < 0)
+ return 1;
+
+ GNUNET_assert (GNUNET_OK == GNUNET_log_setup ("taler-mint-dbinit", "INFO", NULL));
+
+ if (NULL == mint_base_dir)
+ {
+ fprintf (stderr, "Mint base directory not given.\n");
+ return 1;
+ }
+
+ cfg = TALER_MINT_config_load (mint_base_dir);
+ if (NULL == cfg)
+ {
+ fprintf (stderr, "Can't load mint configuration.\n");
+ return 1;
+ }
+ if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg, "mint", "db", &TALER_MINT_db_connection_cfg_str))
+ {
+ fprintf (stderr, "Configuration 'mint.db' not found.\n");
+ return 42;
+ }
+ db_conn = PQconnectdb (TALER_MINT_db_connection_cfg_str);
+ if (CONNECTION_OK != PQstatus (db_conn))
+ {
+ fprintf (stderr, "Database connection failed: %s\n", PQerrorMessage (db_conn));
+ return 1;
+ }
+
+ if (GNUNET_OK != TALER_MINT_init_withdraw_tables (db_conn))
+ {
+ fprintf (stderr, "Failed to initialize database.\n");
+ return 1;
+ }
+
+ return 0;
+}
+
diff --git a/src/mint/taler-mint-httpd.c b/src/mint/taler-mint-httpd.c
new file mode 100644
index 00000000..6d69813c
--- /dev/null
+++ b/src/mint/taler-mint-httpd.c
@@ -0,0 +1,376 @@
+/*
+ This file is part of TALER
+ (C) 2014 GNUnet e.V.
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file taler-mint-httpd.c
+ * @brief Serve the HTTP interface of the mint
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <gnunet/gnunet_util_lib.h>
+#include <jansson.h>
+#include <microhttpd.h>
+#include <libpq-fe.h>
+#include <pthread.h>
+#include "mint.h"
+#include "mint_db.h"
+#include "taler_types.h"
+#include "taler_signatures.h"
+#include "taler_rsa.h"
+#include "taler_json_lib.h"
+#include "taler_microhttpd_lib.h"
+#include "taler-mint-httpd_mhd.h"
+#include "taler-mint-httpd_keys.h"
+#include "taler-mint-httpd_deposit.h"
+#include "taler-mint-httpd_withdraw.h"
+#include "taler-mint-httpd_refresh.h"
+
+
+/**
+ * Base directory of the mint (global)
+ */
+char *mintdir;
+
+/**
+ * The mint's configuration (global)
+ */
+struct GNUNET_CONFIGURATION_Handle *cfg;
+
+/**
+ * Master public key (according to the
+ * configuration in the mint directory).
+ */
+struct GNUNET_CRYPTO_EddsaPublicKey master_pub;
+
+/**
+ * The HTTP Daemon.
+ */
+static struct MHD_Daemon *mydaemon;
+
+/**
+ * The kappa value for refreshing.
+ */
+static unsigned int refresh_security_parameter;
+
+/**
+ * Port to run the daemon on.
+ */
+static uint16_t serve_port;
+
+
+/**
+ * Convert a string representing an EdDSA signature to an EdDSA
+ * signature.
+ *
+ * FIXME: this should be in GNUnet.
+ * FIXME: why? this code is dead, even here!
+ *
+ * @param enc encoded EdDSA signature
+ * @param enclen number of bytes in @a enc (without 0-terminator)
+ * @param pub where to store the EdDSA signature
+ * @return #GNUNET_OK on success
+ */
+int
+TALER_eddsa_signature_from_string (const char *enc,
+ size_t enclen,
+ struct GNUNET_CRYPTO_EddsaSignature *sig)
+{
+ size_t keylen = (sizeof (struct GNUNET_CRYPTO_EddsaSignature)) * 8;
+
+ if (keylen % 5 > 0)
+ keylen += 5 - keylen % 5;
+ keylen /= 5;
+ if (enclen != keylen)
+ return GNUNET_SYSERR;
+
+ if (GNUNET_OK != GNUNET_STRINGS_string_to_data (enc, enclen,
+ sig,
+ sizeof (struct GNUNET_CRYPTO_EddsaSignature)))
+ return GNUNET_SYSERR;
+ return GNUNET_OK;
+}
+
+
+/**
+ * Handle a request coming from libmicrohttpd.
+ *
+ * @param cls closure for MHD daemon (unused)
+ * @param connection the connection
+ * @param url the requested url
+ * @param method the method (POST, GET, ...)
+ * @param upload_data request data
+ * @param upload_data_size size of @a upload_data in bytes
+ * @param con_cls closure for request (a `struct Buffer *`)
+ * @return MHD result code
+ */
+static int
+handle_mhd_request (void *cls,
+ struct MHD_Connection *connection,
+ const char *url,
+ const char *method,
+ const char *version,
+ const char *upload_data,
+ size_t *upload_data_size,
+ void **con_cls)
+{
+ static struct RequestHandler handlers[] =
+ {
+ { "/", MHD_HTTP_METHOD_GET, "text/plain",
+ "Hello, I'm the mint\n", 0,
+ &TALER_MINT_handler_static_response, MHD_HTTP_OK },
+ { "/agpl", MHD_HTTP_METHOD_GET, "text/plain",
+ NULL, 0,
+ &TALER_MINT_handler_agpl_redirect, MHD_HTTP_FOUND },
+ { "/keys", MHD_HTTP_METHOD_GET, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_keys, MHD_HTTP_OK },
+ { "/keys", NULL, "text/plain",
+ "Only GET is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { "/withdraw/status", MHD_HTTP_METHOD_GET, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_withdraw_status, MHD_HTTP_OK },
+ { "/withdraw/status", NULL, "text/plain",
+ "Only GET is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { "/withdraw/sign", MHD_HTTP_METHOD_GET, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_withdraw_sign, MHD_HTTP_OK },
+ { "/withdraw/sign", NULL, "text/plain",
+ "Only GET is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { "/refresh/melt", MHD_HTTP_METHOD_POST, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_refresh_melt, MHD_HTTP_OK },
+ { "/refresh/melt", NULL, "text/plain",
+ "Only POST is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { "/refresh/commit", MHD_HTTP_METHOD_POST, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_refresh_commit, MHD_HTTP_OK },
+ { "/refresh/commit", NULL, "text/plain",
+ "Only POST is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { "/refresh/reveal", MHD_HTTP_METHOD_POST, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_refresh_melt, MHD_HTTP_OK },
+ { "/refresh/reveal", NULL, "text/plain",
+ "Only POST is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { "/refresh/link", MHD_HTTP_METHOD_GET, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_refresh_link, MHD_HTTP_OK },
+ { "/refresh/link", NULL, "text/plain",
+ "Only GET is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { "/refresh/reveal", MHD_HTTP_METHOD_GET, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_refresh_reveal, MHD_HTTP_OK },
+ { "/refresh/reveal", NULL, "text/plain",
+ "Only GET is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { "/deposit", MHD_HTTP_METHOD_POST, "application/json",
+ NULL, 0,
+ &TALER_MINT_handler_deposit, MHD_HTTP_OK },
+ { "/deposit", NULL, "text/plain",
+ "Only POST is allowed", 0,
+ &TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
+ { NULL, NULL, NULL, NULL, 0, 0 }
+ };
+ static struct RequestHandler h404 =
+ {
+ "", NULL, "text/html",
+ "<html><title>404: not found</title></html>", 0,
+ &TALER_MINT_handler_static_response, MHD_HTTP_NOT_FOUND
+ };
+ struct RequestHandler *rh;
+ unsigned int i;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Handling request for URL '%s'\n",
+ url);
+ for (i=0;NULL != handlers[i].url;i++)
+ {
+ rh = &handlers[i];
+ if ( (0 == strcasecmp (url,
+ rh->url)) &&
+ ( (NULL == rh->method) ||
+ (0 == strcasecmp (method,
+ rh->method)) ) )
+ return rh->handler (rh,
+ connection,
+ con_cls,
+ upload_data,
+ upload_data_size);
+ }
+ return TALER_MINT_handler_static_response (&h404,
+ connection,
+ con_cls,
+ upload_data,
+ upload_data_size);
+}
+
+
+
+/**
+ * Load configuration parameters for the mint
+ * server into the corresponding global variables.
+ *
+ * @param param mint_directory the mint's directory
+ * @return GNUNET_OK on success
+ */
+static int
+mint_serve_process_config (const char *mint_directory)
+{
+ unsigned long long port;
+ unsigned long long kappa;
+ char *master_pub_str;
+ char *db_cfg;
+
+ cfg = TALER_MINT_config_load (mint_directory);
+ if (NULL == cfg)
+ {
+ fprintf (stderr,
+ "can't load mint configuration\n");
+ return 1;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (cfg,
+ "mint", "master_pub",
+ &master_pub_str))
+ {
+ fprintf (stderr,
+ "No master public key given in mint configuration.");
+ return GNUNET_NO;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_eddsa_public_key_from_string (master_pub_str,
+ strlen (master_pub_str),
+ &master_pub))
+ {
+ fprintf (stderr,
+ "Invalid master public key given in mint configuration.");
+ return GNUNET_NO;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (cfg,
+ "mint", "db",
+ &db_cfg))
+ {
+ fprintf (stderr,
+ "invalid configuration: mint.db\n");
+ return GNUNET_NO;
+ }
+ if (GNUNET_OK !=
+ TALER_MINT_DB_init (db_cfg))
+ {
+ fprintf (stderr,
+ "failed to initialize DB subsystem\n");
+ return GNUNET_NO;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (cfg,
+ "mint", "port",
+ &port))
+ {
+ fprintf (stderr,
+ "invalid configuration: mint.port\n");
+ return GNUNET_NO;
+ }
+
+ if ((port == 0) || (port > UINT16_MAX))
+ {
+ fprintf (stderr,
+ "invalid configuration (value out of range): mint.port\n");
+ return GNUNET_NO;
+ }
+ serve_port = port;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (cfg,
+ "mint", "refresh_security_parameter",
+ &kappa))
+ {
+ fprintf (stderr,
+ "invalid configuration: mint.refresh_security_parameter\n");
+ return GNUNET_NO;
+ }
+ refresh_security_parameter = kappa;
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * The main function of the serve tool
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char *const *argv)
+{
+ static const struct GNUNET_GETOPT_CommandLineOption options[] = {
+ GNUNET_GETOPT_OPTION_HELP ("gnunet-mint-keyup OPTIONS"),
+ {'d', "mint-dir", "DIR",
+ "mint directory", 1,
+ &GNUNET_GETOPT_set_filename, &mintdir},
+ GNUNET_GETOPT_OPTION_END
+ };
+ int ret;
+
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_log_setup ("taler-mint-serve",
+ "INFO",
+ NULL));
+ if (GNUNET_GETOPT_run ("taler-mint-serve",
+ options,
+ argc, argv) < 0)
+ return 1;
+ if (NULL == mintdir)
+ {
+ fprintf (stderr,
+ "no mint dir given\n");
+ return 1;
+ }
+
+ if (GNUNET_OK != mint_serve_process_config (mintdir))
+ return 1;
+
+
+ mydaemon = MHD_start_daemon (MHD_USE_SELECT_INTERNALLY | MHD_USE_DEBUG,
+ serve_port,
+ NULL, NULL,
+ &handle_mhd_request, NULL,
+ MHD_OPTION_END);
+
+ if (NULL == mydaemon)
+ {
+ fprintf (stderr,
+ "Failed to start MHD.\n");
+ return 1;
+ }
+
+ ret = TALER_MINT_key_reload_loop ();
+ MHD_stop_daemon (mydaemon);
+ return (GNUNET_OK == ret) ? 0 : 1;
+}
+
diff --git a/src/mint/taler-mint-httpd.h b/src/mint/taler-mint-httpd.h
new file mode 100644
index 00000000..59f38aad
--- /dev/null
+++ b/src/mint/taler-mint-httpd.h
@@ -0,0 +1,106 @@
+/*
+ This file is part of TALER
+ (C) 2014 GNUnet e.V.
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file taler-mint-httpd.h
+ * @brief Global declarations for the mint
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#ifndef TALER_MINT_HTTPD_H
+#define TALER_MINT_HTTPD_H
+
+
+/**
+ * Cut-and-choose size for refreshing.
+ * FIXME: maybe make it a config option?
+ */
+#define KAPPA 3
+
+
+/**
+ * The mint's configuration.
+ */
+extern struct GNUNET_CONFIGURATION_Handle *cfg;
+
+/**
+ * Main directory with mint data.
+ */
+extern char *mintdir;
+
+/**
+ * Master public key (according to the
+ * configuration in the mint directory).
+ */
+extern struct GNUNET_CRYPTO_EddsaPublicKey master_pub;
+
+
+/**
+ * Struct describing an URL and the handler for it.
+ */
+struct RequestHandler
+{
+
+ /**
+ * URL the handler is for.
+ */
+ const char *url;
+
+ /**
+ * Method the handler is for, NULL for "all".
+ */
+ const char *method;
+
+ /**
+ * Mime type to use in reply (hint, can be NULL).
+ */
+ const char *mime_type;
+
+ /**
+ * Raw data for the @e handler
+ */
+ const void *data;
+
+ /**
+ * Number of bytes in @e data, 0 for 0-terminated.
+ */
+ size_t data_size;
+
+ /**
+ * Function to call to handle the request.
+ *
+ * @param rh this struct
+ * @param mime_type the @e mime_type for the reply (hint, can be NULL)
+ * @param connection the MHD connection to handle
+ * @param[IN|OUT] connection_cls the connection's closure (can be updated)
+ * @param upload_data upload data
+ * @param[IN|OUT] upload_data_size number of bytes (left) in @a upload_data
+ * @return MHD result code
+ */
+ int (*handler)(struct RequestHandler *rh,
+ struct MHD_Connection *connection,
+ void **connection_cls,
+ const char *upload_data,
+ size_t *upload_data_size);
+
+ /**
+ * Default response code.
+ */
+ int response_code;
+};
+
+
+#endif
diff --git a/src/mint/taler-mint-httpd_deposit.c b/src/mint/taler-mint-httpd_deposit.c
new file mode 100644
index 00000000..ecbc5c13
--- /dev/null
+++ b/src/mint/taler-mint-httpd_deposit.c
@@ -0,0 +1,270 @@
+/*
+ This file is part of TALER
+ (C) 2014 GNUnet e.V.
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file taler-mint-httpd_deposit.c
+ * @brief Handle /deposit requests
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <gnunet/gnunet_util_lib.h>
+#include <jansson.h>
+#include <microhttpd.h>
+#include <libpq-fe.h>
+#include <pthread.h>
+#include "mint.h"
+#include "mint_db.h"
+#include "taler_types.h"
+#include "taler_signatures.h"
+#include "taler_rsa.h"
+#include "taler_json_lib.h"
+#include "taler_microhttpd_lib.h"
+#include "taler-mint-httpd_keys.h"
+#include "taler-mint-httpd_deposit.h"
+
+
+/**
+ * Send confirmation of deposit success to client.
+ *
+ * @param connection connection to the client
+ * @param deposit deposit request to confirm
+ * @return MHD result code
+ */
+static int
+helper_deposit_send_response_success (struct MHD_Connection *connection,
+ struct Deposit *deposit)
+{
+ // FIXME: return more information here
+ return request_send_json_pack (connection, MHD_HTTP_OK,
+ "{s:s}", "status", "DEPOSIT_OK");
+}
+
+
+/**
+ * Handle a "/deposit" request
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[IN|OUT] connection_cls the connection's closure (can be updated)
+ * @param upload_data upload data
+ * @param[IN|OUT] upload_data_size number of bytes (left) in @a upload_data
+ * @return MHD result code
+ */
+int
+TALER_MINT_handler_deposit (struct RequestHandler *rh,
+ struct MHD_Connection *connection,
+ void **connection_cls,
+ const char *upload_data,
+ size_t *upload_data_size)
+{
+ json_t *json;
+ struct Deposit *deposit;
+ json_t *wire;
+ json_t *resp;
+ char *wire_enc = NULL;
+ const char *deposit_type;
+ struct MintKeyState *key_state;
+ struct TALER_CoinPublicInfo coin_info;
+ struct TALER_RSA_Signature ubsig;
+ size_t len;
+ int resp_code;
+ PGconn *db_conn;
+ int res;
+
+ res = process_post_json (connection,
+ connection_cls,
+ upload_data, upload_data_size,
+ &json);
+ if (GNUNET_SYSERR == res)
+ {
+ // FIXME: return 'internal error'
+ GNUNET_break (0);
+ return MHD_NO;
+ }
+ if (GNUNET_NO == res)
+ return MHD_YES;
+ if (NULL == (db_conn = TALER_MINT_DB_get_connection ()))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ deposit = NULL;
+ wire = NULL;
+ resp = NULL;
+ if (-1 == json_unpack (json,
+ "{s:s s:o}",
+ "type", &deposit_type,
+ "wire", &wire))
+ {
+ GNUNET_break_op (0);
+ resp = json_pack ("{s:s}", "error", "Bad format");
+ resp_code = MHD_HTTP_BAD_REQUEST;
+ goto EXITIF_exit;
+ }
+ if (NULL == (wire_enc = json_dumps (wire, JSON_COMPACT|JSON_SORT_KEYS)))
+ {
+ GNUNET_break_op (0);
+ resp = json_pack ("{s:s}", "error", "Bad format");
+ resp_code = MHD_HTTP_BAD_REQUEST;
+ goto EXITIF_exit;
+ }
+ len = strlen (wire_enc) + 1;
+ deposit = GNUNET_malloc (sizeof (struct Deposit) + len);
+#define EXITIF(cond) \
+ do { \
+ if (cond) { GNUNET_break (0); goto EXITIF_exit; } \
+ } while (0)
+#define PARSE_DATA(field, addr) \
+ EXITIF (GNUNET_OK != request_json_require_nav \
+ (connection, json, \
+ JNAV_FIELD, field, JNAV_RET_DATA, addr, sizeof (*addr)))
+ PARSE_DATA ("coin_pub", &deposit->coin_pub);
+ PARSE_DATA ("denom_pub", &deposit->denom_pub);
+ PARSE_DATA ("ubsig", &ubsig);
+ PARSE_DATA ("merchant_pub", &deposit->merchant_pub);
+ PARSE_DATA ("H_a", &deposit->h_contract);
+ PARSE_DATA ("H_wire", &deposit->h_wire);
+ PARSE_DATA ("csig", &deposit->coin_sig);
+ PARSE_DATA ("transaction_id", &deposit->transaction_id);
+#undef PARSE_DATA
+ if (0 == strcmp ("DIRECT_DEPOSIT", deposit_type))
+ deposit->purpose.purpose = htonl (TALER_SIGNATURE_DEPOSIT);
+ else if (0 == strcmp ("INCREMENTAL_DEPOSIT", deposit_type))
+ deposit->purpose.purpose = htonl (TALER_SIGNATURE_INCREMENTAL_DEPOSIT);
+ else
+ {
+ GNUNET_break_op (0);
+ resp = json_pack ("{s:s}", "error", "Bad format");
+ resp_code = MHD_HTTP_BAD_REQUEST;
+ goto EXITIF_exit;
+ }
+ deposit->purpose.size = htonl (sizeof (struct Deposit)
+ - offsetof (struct Deposit, purpose));
+ memcpy (&coin_info.coin_pub,
+ &deposit->coin_pub,
+ sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
+ coin_info.denom_pub = deposit->denom_pub;
+ coin_info.denom_sig = ubsig;
+ key_state = TALER_MINT_key_state_acquire ();
+ if (GNUNET_YES != TALER_MINT_test_coin_valid (key_state,
+ &coin_info))
+ {
+ TALER_MINT_key_state_release (key_state);
+ resp = json_pack ("{s:s}", "error", "Coin is not valid");
+ resp_code = MHD_HTTP_NOT_FOUND;
+ goto EXITIF_exit;
+ }
+ TALER_MINT_key_state_release (key_state);
+ /*
+ if (GNUNET_OK != GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_DEPOSIT,
+ &deposit->purpose,
+ &deposit->coin_sig,
+ &deposit->coin_pub))
+ {
+ resp = json_pack ("{s:s}", "error", "Signature verfication failed");
+ resp_code = MHD_HTTP_NOT_FOUND;
+ goto EXITIF_exit;
+ }
+ */
+
+ /* Check if we already received the same deposit permission,
+ * or the coin was already deposited */
+
+ {
+ struct Deposit *existing_deposit;
+ int res;
+
+ res = TALER_MINT_DB_get_deposit (db_conn,
+ &deposit->coin_pub,
+ &existing_deposit);
+ if (GNUNET_YES == res)
+ {
+ // FIXME: memory leak
+ if (0 == memcmp (existing_deposit, deposit, sizeof (struct Deposit)))
+ return helper_deposit_send_response_success (connection, deposit);
+ // FIXME: in the future, check if there's enough credits
+ // left on the coin. For now: refuse
+ // FIXME: return more information here
+ return request_send_json_pack (connection, MHD_HTTP_FORBIDDEN,
+ "{s:s}",
+ "error", "double spending");
+ }
+
+ if (GNUNET_SYSERR == res)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ }
+
+ {
+ struct KnownCoin known_coin;
+ int res;
+
+ res = TALER_MINT_DB_get_known_coin (db_conn, &coin_info.coin_pub, &known_coin);
+ if (GNUNET_YES == res)
+ {
+ // coin must have been refreshed
+ // FIXME: check
+ // FIXME: return more information here
+ return request_send_json_pack (connection, MHD_HTTP_FORBIDDEN,
+ "{s:s}",
+ "error", "coin was refreshed");
+ }
+ if (GNUNET_SYSERR == res)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ /* coin valid but not known => insert into DB */
+ known_coin.is_refreshed = GNUNET_NO;
+ known_coin.expended_balance = TALER_amount_ntoh (deposit->amount);
+ known_coin.public_info = coin_info;
+
+ if (GNUNET_OK != TALER_MINT_DB_insert_known_coin (db_conn, &known_coin))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ }
+
+ if (GNUNET_OK != TALER_MINT_DB_insert_deposit (db_conn, deposit))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ return helper_deposit_send_response_success (connection, deposit);
+
+ EXITIF_exit:
+ if (NULL != resp)
+ res = send_response_json (connection, resp, resp_code);
+ else
+ res = MHD_NO;
+ if (NULL != wire)
+ json_decref (wire);
+ if (NULL != deposit)
+ GNUNET_free (deposit);
+ if (NULL != wire_enc)
+ GNUNET_free (wire_enc);
+ return res;
+#undef EXITIF
+#undef PARSE_DATA
+}
+
+/* end of taler-mint-httpd_deposit.c */
diff --git a/src/mint/taler-mint-httpd_deposit.h b/src/mint/taler-mint-httpd_deposit.h
new file mode 100644
index 00000000..dd7b8c13
--- /dev/null
+++ b/src/mint/taler-mint-httpd_deposit.h
@@ -0,0 +1,48 @@
+/*
+ This file is part of TALER
+ (C) 2014 GNUnet e.V.
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file taler-mint-httpd_deposit.h
+ * @brief Handle /deposit requests
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#ifndef TALER_MINT_HTTPD_DEPOSIT_H
+#define TALER_MINT_HTTPD_DEPOSIT_H
+
+#include <gnunet/gnunet_util_lib.h>
+#include <microhttpd.h>
+#include "taler-mint-httpd.h"
+
+
+/**
+ * Handle a "/deposit" request
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[IN|OUT] connection_cls the connection's closure (can be updated)
+ * @param upload_data upload data
+ * @param[IN|OUT] upload_data_size number of bytes (left) in @a upload_data
+ * @return MHD result code
+ */
+int
+TALER_MINT_handler_deposit (struct RequestHandler *rh,
+ struct MHD_Connection *connection,
+ void **connection_cls,
+ const char *upload_data,
+ size_t *upload_data_size);
+
+#endif
diff --git a/src/mint/taler-mint-httpd_keys.c b/src/mint/taler-mint-httpd_keys.c
new file mode 100644
index 00000000..ba023fe6
--- /dev/null
+++ b/src/mint/taler-mint-httpd_keys.c
@@ -0,0 +1,512 @@
+/*
+ This file is part of TALER
+ (C) 2014 GNUnet e.V.
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file taler-mint-httpd_keys.c
+ * @brief Handle /keys requests
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <gnunet/gnunet_util_lib.h>
+#include <jansson.h>
+#include <microhttpd.h>
+#include <libpq-fe.h>
+#include <pthread.h>
+#include "mint.h"
+#include "mint_db.h"
+#include "taler_types.h"
+#include "taler_signatures.h"
+#include "taler_rsa.h"
+#include "taler_json_lib.h"
+#include "taler_microhttpd_lib.h"
+#include "taler-mint-httpd_keys.h"
+
+
+/**
+ * Mint key state. Never use directly, instead access via
+ * #TALER_MINT_key_state_acquire and #TALER_MINT_key_state_release.
+ */
+static struct MintKeyState *internal_key_state;
+
+/**
+ * Mutex protecting access to #internal_key_state.
+ */
+static pthread_mutex_t internal_key_state_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/**
+ * Pipe used for signaling reloading of our key state.
+ */
+static int reload_pipe[2];
+
+
+/**
+ * Convert the public part of a denomination key
+ * issue to a JSON object.
+ *
+ * @param dki the denomination key issue
+ * @return a JSON object describing the denomination key isue (public part)
+ */
+static json_t *
+denom_key_issue_to_json (const struct TALER_MINT_DenomKeyIssue *dki)
+{
+ json_t *dk_json = json_object ();
+ json_object_set_new (dk_json, "master_sig",
+ TALER_JSON_from_data (&dki->signature, sizeof (struct GNUNET_CRYPTO_EddsaSignature)));
+ json_object_set_new (dk_json, "stamp_start", TALER_JSON_from_abs (GNUNET_TIME_absolute_ntoh (dki->start)));
+ json_object_set_new (dk_json, "stamp_expire_withdraw", TALER_JSON_from_abs (GNUNET_TIME_absolute_ntoh (dki->expire_withdraw)));
+ json_object_set_new (dk_json, "stamp_expire_deposit", TALER_JSON_from_abs (GNUNET_TIME_absolute_ntoh (dki->expire_spend)));
+ json_object_set_new (dk_json, "denom_pub",
+ TALER_JSON_from_data (&dki->denom_pub, sizeof (struct TALER_RSA_PublicKeyBinaryEncoded)));
+ json_object_set_new (dk_json, "value",
+ TALER_JSON_from_amount (TALER_amount_ntoh (dki->value)));
+ json_object_set_new (dk_json,
+ "fee_withdraw",
+ TALER_JSON_from_amount(TALER_amount_ntoh (dki->fee_withdraw)));
+ json_object_set_new (dk_json,
+ "fee_deposit",
+ TALER_JSON_from_amount(TALER_amount_ntoh (dki->fee_deposit)));
+ json_object_set_new (dk_json,
+ "fee_refresh",
+ TALER_JSON_from_amount(TALER_amount_ntoh (dki->fee_refresh)));
+ return dk_json;
+}
+
+
+/**
+ * Convert the public part of a sign key
+ * issue to a JSON object.
+ *
+ * @param ski the sign key issue
+ * @return a JSON object describing the sign key isue (public part)
+ */
+static json_t *
+sign_key_issue_to_json (const struct TALER_MINT_SignKeyIssue *ski)
+{
+ json_t *sk_json = json_object ();
+ json_object_set_new (sk_json, "stamp_start", TALER_JSON_from_abs (GNUNET_TIME_absolute_ntoh (ski->start)));
+ json_object_set_new (sk_json, "stamp_expire", TALER_JSON_from_abs (GNUNET_TIME_absolute_ntoh (ski->expire)));
+ json_object_set_new (sk_json, "master_sig",
+ TALER_JSON_from_data (&ski->signature, sizeof (struct GNUNET_CRYPTO_EddsaSignature)));
+ json_object_set_new (sk_json, "key",
+ TALER_JSON_from_data (&ski->signkey_pub, sizeof (struct GNUNET_CRYPTO_EddsaPublicKey)));
+ return sk_json;
+}
+
+
+/**
+ * Get the relative time value that describes how
+ * far in the future do we want to provide coin keys.
+ *
+ * @return the provide duration
+ */
+static struct GNUNET_TIME_Relative
+TALER_MINT_conf_duration_provide ()
+{
+ struct GNUNET_TIME_Relative rel;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (cfg,
+ "mint_keys",
+ "lookahead_provide",
+ &rel))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "mint_keys.lookahead_provide not valid or not given\n");
+ GNUNET_abort ();
+ }
+ return rel;
+}
+
+
+/**
+ * Iterator for denomination keys.
+ *
+ * @param cls closure
+ * @param dki the denomination key issue
+ * @param alias coin alias
+ * @return #GNUNET_OK to continue to iterate,
+ * #GNUNET_NO to stop iteration with no error,
+ * #GNUNET_SYSERR to abort iteration with error!
+ */
+static int
+reload_keys_denom_iter (void *cls,
+ const char *alias,
+ const struct TALER_MINT_DenomKeyIssue *dki)
+{
+ struct MintKeyState *ctx = cls;
+ struct GNUNET_TIME_Absolute stamp_provide;
+ struct GNUNET_HashCode denom_key_hash;
+ int res;
+
+ stamp_provide = GNUNET_TIME_absolute_add (ctx->reload_time,
+ TALER_MINT_conf_duration_provide ());
+
+ if (GNUNET_TIME_absolute_ntoh (dki->expire_spend).abs_value_us < ctx->reload_time.abs_value_us)
+ {
+ // this key is expired
+ return GNUNET_OK;
+ }
+ if (GNUNET_TIME_absolute_ntoh (dki->start).abs_value_us > stamp_provide.abs_value_us)
+ {
+ // we are to early for this key
+ return GNUNET_OK;
+ }
+
+ GNUNET_CRYPTO_hash (&dki->denom_pub, sizeof (struct GNUNET_CRYPTO_EddsaPublicKey), &denom_key_hash);
+
+ res = GNUNET_CONTAINER_multihashmap_put (ctx->denomkey_map,
+ &denom_key_hash,
+ GNUNET_memdup (dki, sizeof (struct TALER_MINT_DenomKeyIssue)),
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+ if (GNUNET_OK != res)
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Duplicate denomination key\n");
+
+ json_array_append_new (ctx->denom_keys_array,
+ denom_key_issue_to_json (dki));
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Iterator for sign keys.
+ *
+ * @param cls closure
+ * @param ski the sign key issue
+ * @return #GNUNET_OK to continue to iterate,
+ * #GNUNET_NO to stop iteration with no error,
+ * #GNUNET_SYSERR to abort iteration with error!
+ */
+static int
+reload_keys_sign_iter (void *cls,
+ const struct TALER_MINT_SignKeyIssue *ski)
+{
+ struct MintKeyState *ctx = cls;
+ struct GNUNET_TIME_Absolute stamp_provide;
+
+ stamp_provide = GNUNET_TIME_absolute_add (ctx->reload_time, TALER_MINT_conf_duration_provide (cfg));
+
+ if (GNUNET_TIME_absolute_ntoh (ski->expire).abs_value_us < ctx->reload_time.abs_value_us)
+ {
+ // this key is expired
+ return GNUNET_OK;
+ }
+
+ if (GNUNET_TIME_absolute_ntoh (ski->start).abs_value_us > stamp_provide.abs_value_us)
+ {
+ // we are to early for this key
+ return GNUNET_OK;
+ }
+
+ // the signkey is valid for now, check
+ // if it's more recent than the current one!
+ if (GNUNET_TIME_absolute_ntoh (ctx->current_sign_key_issue.start).abs_value_us >
+ GNUNET_TIME_absolute_ntoh (ski->start).abs_value_us)
+ ctx->current_sign_key_issue = *ski;
+
+
+ ctx->next_reload = GNUNET_TIME_absolute_min (ctx->next_reload,
+ GNUNET_TIME_absolute_ntoh (ski->expire));
+
+ json_array_append_new (ctx->sign_keys_array,
+ sign_key_issue_to_json (ski));
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Load the mint's key state from disk.
+ *
+ * @return fresh key state (with reference count 1)
+ */
+static struct MintKeyState *