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authorChristian Grothoff <christian@grothoff.org>2019-11-23 10:48:05 +0100
committerChristian Grothoff <christian@grothoff.org>2019-11-23 10:48:05 +0100
commita2a5f429159a5be2a453dcc7dacf30e7c0f9e963 (patch)
treed056233d3b81b6baf4c05b4573568eab99b8fbf4
parent161b801fd691e0db697f2228dd96c87f71d01f40 (diff)
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start with libtalermhd
-rw-r--r--configure.ac1
-rw-r--r--src/Makefile.am2
-rw-r--r--src/exchange-tools/taler-exchange-keyup.c2
-rw-r--r--src/exchange/taler-exchange-aggregator.c4
-rw-r--r--src/exchange/taler-exchange-httpd_refresh_reveal.c6
-rw-r--r--src/exchange/taler-exchange-wirewatch.c4
-rw-r--r--src/include/Makefile.am1
-rw-r--r--src/include/gauger.h2
-rw-r--r--src/include/taler_mhd_lib.h156
-rw-r--r--src/lib/exchange_api_handle.c2
-rw-r--r--src/mhd/Makefile.am24
-rw-r--r--src/mhd/mhd_responses.c319
12 files changed, 512 insertions, 11 deletions
diff --git a/configure.ac b/configure.ac
index 44703bf1..07fc2860 100644
--- a/configure.ac
+++ b/configure.ac
@@ -550,6 +550,7 @@ AC_CONFIG_FILES([Makefile
src/benchmark/Makefile
src/include/Makefile
src/json/Makefile
+ src/mhd/Makefile
src/pq/Makefile
src/util/Makefile
src/util/taler-config
diff --git a/src/Makefile.am b/src/Makefile.am
index 38bf715f..761b9c33 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -22,7 +22,7 @@ pkgcfg_DATA = \
EXTRA_DIST = \
taler.conf
-SUBDIRS = include util wire json curl $(PQ_DIR) $(BANK_LIB) wire-plugins exchangedb exchange exchange-tools auditordb auditor
+SUBDIRS = include util wire json curl $(PQ_DIR) mhd $(BANK_LIB) wire-plugins exchangedb exchange exchange-tools auditordb auditor
if HAVE_LIBCURL
SUBDIRS += lib benchmark
else
diff --git a/src/exchange-tools/taler-exchange-keyup.c b/src/exchange-tools/taler-exchange-keyup.c
index d974ec46..e6e3db0d 100644
--- a/src/exchange-tools/taler-exchange-keyup.c
+++ b/src/exchange-tools/taler-exchange-keyup.c
@@ -765,7 +765,7 @@ create_denomkey_issue (const struct CoinTypeParams *params,
GNUNET_assert (NULL != dki->denom_priv.rsa_private_key);
dki->denom_pub.rsa_public_key
= GNUNET_CRYPTO_rsa_private_key_get_public (
- dki->denom_priv.rsa_private_key);
+ dki->denom_priv.rsa_private_key);
GNUNET_CRYPTO_rsa_public_key_hash (dki->denom_pub.rsa_public_key,
&dki->issue.properties.denom_hash);
dki->issue.properties.master = master_public_key;
diff --git a/src/exchange/taler-exchange-aggregator.c b/src/exchange/taler-exchange-aggregator.c
index 95f56d0d..98de86da 100644
--- a/src/exchange/taler-exchange-aggregator.c
+++ b/src/exchange/taler-exchange-aggregator.c
@@ -1960,10 +1960,10 @@ main (int argc,
options,
&run, NULL))
{
- GNUNET_free ((void*) argv);
+ GNUNET_free ((void *) argv);
return 1;
}
- GNUNET_free ((void*) argv);
+ GNUNET_free ((void *) argv);
return global_ret;
}
diff --git a/src/exchange/taler-exchange-httpd_refresh_reveal.c b/src/exchange/taler-exchange-httpd_refresh_reveal.c
index be5228dd..fbfe432d 100644
--- a/src/exchange/taler-exchange-httpd_refresh_reveal.c
+++ b/src/exchange/taler-exchange-httpd_refresh_reveal.c
@@ -751,9 +751,9 @@ handle_refresh_reveal_json (struct MHD_Connection *connection,
{
rctx->ev_sigs[i].rsa_signature
= GNUNET_CRYPTO_rsa_sign_blinded (
- rctx->dkis[i]->denom_priv.rsa_private_key,
- rctx->rcds[i].coin_ev,
- rctx->rcds[i].coin_ev_size);
+ rctx->dkis[i]->denom_priv.rsa_private_key,
+ rctx->rcds[i].coin_ev,
+ rctx->rcds[i].coin_ev_size);
if (NULL == rctx->ev_sigs[i].rsa_signature)
{
GNUNET_break (0);
diff --git a/src/exchange/taler-exchange-wirewatch.c b/src/exchange/taler-exchange-wirewatch.c
index 3699c9d3..21f62cd8 100644
--- a/src/exchange/taler-exchange-wirewatch.c
+++ b/src/exchange/taler-exchange-wirewatch.c
@@ -733,10 +733,10 @@ main (int argc,
options,
&run, NULL))
{
- GNUNET_free ((void*) argv);
+ GNUNET_free ((void *) argv);
return 1;
}
- GNUNET_free ((void*) argv);
+ GNUNET_free ((void *) argv);
return global_ret;
}
diff --git a/src/include/Makefile.am b/src/include/Makefile.am
index 1e624caa..645bdc9f 100644
--- a/src/include/Makefile.am
+++ b/src/include/Makefile.am
@@ -27,6 +27,7 @@ talerinclude_HEADERS = \
taler_json_lib.h \
taler_testing_lib.h \
taler_util.h \
+ taler_mhd_lib.h \
taler_pq_lib.h \
taler_signatures.h \
taler_wire_lib.h \
diff --git a/src/include/gauger.h b/src/include/gauger.h
index 7d66051b..36dc055b 100644
--- a/src/include/gauger.h
+++ b/src/include/gauger.h
@@ -35,7 +35,7 @@
__gauger_v[7] = "-c"; \
__gauger_v[8] = (char *) category; \
__gauger_v[9] = (char *) NULL; \
- execvp ("gauger", (char*const*) __gauger_v); \
+ execvp ("gauger", (char *const *) __gauger_v); \
perror ("gauger"); \
_exit (1); \
}else{ \
diff --git a/src/include/taler_mhd_lib.h b/src/include/taler_mhd_lib.h
new file mode 100644
index 00000000..55396090
--- /dev/null
+++ b/src/include/taler_mhd_lib.h
@@ -0,0 +1,156 @@
+/*
+ This file is part of TALER
+ Copyright (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, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file taler_mhd_lib.h
+ * @brief API for generating MHD replies
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#ifndef TALER_MHD_LIB_H
+#define TALER_MHD_LIB_H
+#include <gnunet/gnunet_util_lib.h>
+#include <jansson.h>
+#include <microhttpd.h>
+#include "taler_error_codes.h"
+
+/**
+ * Global options for response generation.
+ */
+enum TALER_MHD_GlobalOptions
+{
+
+ /**
+ * Use defaults.
+ */
+ TALER_MHD_GO_NONE = 0,
+
+ /**
+ * Add "Connection: Close" header.
+ */
+ TALER_MHD_GO_FORCE_CONNECTION_CLOSE = 1,
+
+ /**
+ * Disable use of compression, even if the client
+ * supports it.
+ */
+ TALER_MHD_GO_DISABLE_COMPRESSION = 2
+
+};
+
+
+/**
+ * Set global options for response generation
+ * within libtalermhd.
+ *
+ * @param go global options to use
+ */
+void
+TALER_MHD_setup (enum TALER_MHD_GlobalOptions go);
+
+
+/**
+ * Add headers we want to return in every response.
+ * Useful for testing, like if we want to always close
+ * connections.
+ *
+ * @param response response to modify
+ */
+void
+TALER_MHD_add_global_headers (struct MHD_Response *response);
+
+
+/**
+ * Try to compress a response body. Updates @a buf and @a buf_size.
+ *
+ * @param[in,out] buf pointer to body to compress
+ * @param[in,out] buf_size pointer to initial size of @a buf
+ * @return #MHD_YES if @a buf was compressed
+ */
+int
+TALER_MHD_body_compress (void **buf,
+ size_t *buf_size);
+
+
+/**
+ * Is HTTP body deflate compression supported by the client?
+ *
+ * @param connection connection to check
+ * @return #MHD_YES if 'deflate' compression is allowed
+ */
+int
+TALER_MHD_can_compress (struct MHD_Connection *connection);
+
+
+/**
+ * Send JSON object as response.
+ *
+ * @param connection the MHD connection
+ * @param json the json object
+ * @param response_code the http response code
+ * @return MHD result code
+ */
+int
+TALER_MHD_reply_json (struct MHD_Connection *connection,
+ const json_t *json,
+ unsigned int response_code);
+
+
+/**
+ * Function to call to handle the request by building a JSON
+ * reply from a format string and varargs.
+ *
+ * @param connection the MHD connection to handle
+ * @param response_code HTTP response code to use
+ * @param fmt format string for pack
+ * @param ... varargs
+ * @return MHD result code
+ */
+int
+TALER_MHD_reply_json_pack (struct MHD_Connection *connection,
+ unsigned int response_code,
+ const char *fmt,
+ ...);
+
+
+/**
+ * Send a response indicating an error.
+ *
+ * @param connection the MHD connection to use
+ * @param ec error code uniquely identifying the error
+ * @param http_status HTTP status code to use
+ * @param hint human readable hint about the error
+ * @return a MHD result code
+ */
+int
+TALER_MHD_reply_with_error (struct MHD_Connection *connection,
+ unsigned int http_status,
+ enum TALER_ErrorCode ec,
+ const char *hint);
+
+
+/**
+ * Send a response indicating that the request was too big.
+ *
+ * @param connection the MHD connection to use
+ * @return a MHD result code
+ */
+int
+TALER_MHD_reply_request_too_large (struct MHD_Connection *connection);
+
+
+#endif
diff --git a/src/lib/exchange_api_handle.c b/src/lib/exchange_api_handle.c
index efac7077..04de3767 100644
--- a/src/lib/exchange_api_handle.c
+++ b/src/lib/exchange_api_handle.c
@@ -1262,7 +1262,7 @@ keys_completed_cb (void *cls,
for (unsigned int i = 0; i<kd_old.num_denom_keys; i++)
kd.denom_keys[i].key.rsa_public_key
= GNUNET_CRYPTO_rsa_public_key_dup (
- kd_old.denom_keys[i].key.rsa_public_key);
+ kd_old.denom_keys[i].key.rsa_public_key);
kd.num_auditors = kd_old.num_auditors;
kd.auditors = GNUNET_new_array (kd.num_auditors,
diff --git a/src/mhd/Makefile.am b/src/mhd/Makefile.am
new file mode 100644
index 00000000..2c6d464f
--- /dev/null
+++ b/src/mhd/Makefile.am
@@ -0,0 +1,24 @@
+# This Makefile.am is in the public domain
+AM_CPPFLAGS = -I$(top_srcdir)/src/include
+
+if USE_COVERAGE
+ AM_CFLAGS = --coverage -O0
+ XLIB = -lgcov
+endif
+
+lib_LTLIBRARIES = \
+ libtalermhd.la
+
+libtalermhd_la_SOURCES = \
+ mhd_responses.c
+libtalermhd_la_LDFLAGS = \
+ -version-info 0:0:0 \
+ -export-dynamic -no-undefined
+libtalermhd_la_LIBADD = \
+ -lgnunetjson \
+ $(top_builddir)/src/json/libtalerjson.la \
+ $(top_builddir)/src/util/libtalerutil.la \
+ -lgnunetutil \
+ -ljansson \
+ $(XLIB)
+
diff --git a/src/mhd/mhd_responses.c b/src/mhd/mhd_responses.c
new file mode 100644
index 00000000..24d55bfa
--- /dev/null
+++ b/src/mhd/mhd_responses.c
@@ -0,0 +1,319 @@
+/*
+ This file is part of TALER
+ Copyright (C) 2014-2019 Taler Systems SA
+
+ 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, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file mhd_responses.c
+ * @brief API for generating HTTP replies
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <zlib.h>
+#include "taler_util.h"
+#include "taler_mhd_lib.h"
+
+
+/**
+ * Enable checking signatures before we hand them out
+ * (even though we should have checked them before).
+ * So technically these checks are redundant, but good
+ * during testing.
+ */
+#define SANITY_CHECKS_ON 1
+
+
+/**
+ * Global options for response generation.
+ */
+static enum TALER_MHD_GlobalOptions TM_go;
+
+
+/**
+ * Set global options for response generation
+ * within libtalermhd.
+ *
+ * @param go global options to use
+ */
+void
+TALER_MHD_setup (enum TALER_MHD_GlobalOptions go)
+{
+ TM_go = go;
+}
+
+
+/**
+ * Add headers we want to return in every response.
+ * Useful for testing, like if we want to always close
+ * connections.
+ *
+ * @param response response to modify
+ */
+void
+TALER_MHD_add_global_headers (struct MHD_Response *response)
+{
+ if (0 != (TM_go & TALER_MHD_GO_FORCE_CONNECTION_CLOSE))
+ GNUNET_break (MHD_YES ==
+ MHD_add_response_header (response,
+ MHD_HTTP_HEADER_CONNECTION,
+ "close"));
+}
+
+
+/**
+ * Is HTTP body deflate compression supported by the client?
+ *
+ * @param connection connection to check
+ * @return #MHD_YES if 'deflate' compression is allowed
+ *
+ * Note that right now we're ignoring q-values, which is technically
+ * not correct, and also do not support "*" anywhere but in a line by
+ * itself. This should eventually be fixed, see also
+ * https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
+ */
+int
+TALER_MHD_can_compress (struct MHD_Connection *connection)
+{
+ const char *ae;
+ const char *de;
+
+ if (0 != (TM_go & TALER_MHD_GO_DISABLE_COMPRESSION))
+ return MHD_NO;
+ ae = MHD_lookup_connection_value (connection,
+ MHD_HEADER_KIND,
+ MHD_HTTP_HEADER_ACCEPT_ENCODING);
+ if (NULL == ae)
+ return MHD_NO;
+ if (0 == strcmp (ae,
+ "*"))
+ return MHD_YES;
+ de = strstr (ae,
+ "deflate");
+ if (NULL == de)
+ return MHD_NO;
+ if ( ( (de == ae) ||
+ (de[-1] == ',') ||
+ (de[-1] == ' ') ) &&
+ ( (de[strlen ("deflate")] == '\0') ||
+ (de[strlen ("deflate")] == ',') ||
+ (de[strlen ("deflate")] == ';') ) )
+ return MHD_YES;
+ return MHD_NO;
+}
+
+
+/**
+ * Try to compress a response body. Updates @a buf and @a buf_size.
+ *
+ * @param[in,out] buf pointer to body to compress
+ * @param[in,out] buf_size pointer to initial size of @a buf
+ * @return #MHD_YES if @a buf was compressed
+ */
+int
+TALER_MHD_body_compress (void **buf,
+ size_t *buf_size)
+{
+ Bytef *cbuf;
+ uLongf cbuf_size;
+ int ret;
+
+ cbuf_size = compressBound (*buf_size);
+ cbuf = malloc (cbuf_size);
+ if (NULL == cbuf)
+ return MHD_NO;
+ ret = compress (cbuf,
+ &cbuf_size,
+ (const Bytef *) *buf,
+ *buf_size);
+ if ( (Z_OK != ret) ||
+ (cbuf_size >= *buf_size) )
+ {
+ /* compression failed */
+ free (cbuf);
+ return MHD_NO;
+ }
+ free (*buf);
+ *buf = (void *) cbuf;
+ *buf_size = (size_t) cbuf_size;
+ return MHD_YES;
+}
+
+
+/**
+ * Send JSON object as response.
+ *
+ * @param connection the MHD connection
+ * @param json the json object
+ * @param response_code the http response code
+ * @return MHD result code
+ */
+int
+TALER_MHD_reply_json (struct MHD_Connection *connection,
+ const json_t *json,
+ unsigned int response_code)
+{
+ struct MHD_Response *resp;
+ void *json_str;
+ size_t json_len;
+ int ret;
+ int comp;
+
+ json_str = json_dumps (json,
+ JSON_INDENT (2));
+ if (NULL == json_str)
+ {
+ /**
+ * This log helps to figure out which
+ * function called this one and assert-failed.
+ */
+ TALER_LOG_ERROR ("Aborting json-packing for HTTP code: %u\n",
+ response_code);
+
+ GNUNET_assert (0);
+ return MHD_NO;
+ }
+ json_len = strlen (json_str);
+ /* try to compress the body */
+ comp = MHD_NO;
+ if (MHD_YES ==
+ TALER_MHD_can_compress (connection))
+ comp = TALER_MHD_body_compress (&json_str,
+ &json_len);
+ resp = MHD_create_response_from_buffer (json_len,
+ json_str,
+ MHD_RESPMEM_MUST_FREE);
+ if (NULL == resp)
+ {
+ free (json_str);
+ GNUNET_break (0);
+ return MHD_NO;
+ }
+ TALER_MHD_add_global_headers (resp);
+ GNUNET_break (MHD_YES ==
+ MHD_add_response_header (resp,
+ MHD_HTTP_HEADER_CONTENT_TYPE,
+ "application/json"));
+ if (MHD_YES == comp)
+ {
+ /* Need to indicate to client that body is compressed */
+ if (MHD_NO ==
+ MHD_add_response_header (resp,
+ MHD_HTTP_HEADER_CONTENT_ENCODING,
+ "deflate"))
+ {
+ GNUNET_break (0);
+ MHD_destroy_response (resp);
+ return MHD_NO;
+ }
+ }
+ ret = MHD_queue_response (connection,
+ response_code,
+ resp);
+ MHD_destroy_response (resp);
+ return ret;
+}
+
+
+/**
+ * Function to call to handle the request by building a JSON
+ * reply from a format string and varargs.
+ *
+ * @param connection the MHD connection to handle
+ * @param response_code HTTP response code to use
+ * @param fmt format string for pack
+ * @param ... varargs
+ * @return MHD result code
+ */
+int
+TALER_MHD_reply_json_pack (struct MHD_Connection *connection,
+ unsigned int response_code,
+ const char *fmt,
+ ...)
+{
+ json_t *json;
+ va_list argp;
+ int ret;
+ json_error_t jerror;
+
+ va_start (argp, fmt);
+ json = json_vpack_ex (&jerror, 0, fmt, argp);
+ va_end (argp);
+ if (NULL == json)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Failed to pack JSON with format `%s': %s\n",
+ fmt,
+ jerror.text);
+ GNUNET_break (0);
+ return MHD_NO;
+ }
+ ret = TALER_MHD_reply_json (connection,
+ json,
+ response_code);
+ json_decref (json);
+ return ret;
+}
+
+
+/**
+ * Send a response indicating an error.
+ *
+ * @param connection the MHD connection to use
+ * @param ec error code uniquely identifying the error
+ * @param http_status HTTP status code to use
+ * @param hint human readable hint about the error
+ * @return a MHD result code
+ */
+int
+TALER_MHD_reply_with_error (struct MHD_Connection *connection,
+ unsigned int http_status,
+ enum TALER_ErrorCode ec,
+ const char *hint)
+{
+ return TALER_MHD_reply_json_pack (connection,
+ http_status,
+ "{s:I, s:s}",
+ "code", (json_int_t) ec,
+ "hint", hint);
+}
+
+
+/**
+ * Send a response indicating that the request was too big.
+ *
+ * @param connection the MHD connection to use
+ * @return a MHD result code
+ */
+int
+TALER_MHD_reply_request_too_large (struct MHD_Connection *connection)
+{
+ struct MHD_Response *resp;
+ int ret;
+
+ resp = MHD_create_response_from_buffer (0,
+ NULL,
+ MHD_RESPMEM_PERSISTENT);
+ if (NULL == resp)
+ return MHD_NO;
+ TALER_MHD_add_global_headers (resp);
+ ret = MHD_queue_response (connection,
+ MHD_HTTP_REQUEST_ENTITY_TOO_LARGE,
+ resp);
+ MHD_destroy_response (resp);
+ return ret;
+}
+
+
+/* end of mhd_responses.c */