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Diffstat (limited to 'src/exchange-tools/taler-exchange-wire.c')
| -rw-r--r-- | src/exchange-tools/taler-exchange-wire.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/exchange-tools/taler-exchange-wire.c b/src/exchange-tools/taler-exchange-wire.c new file mode 100644 index 000000000..3bea78f67 --- /dev/null +++ b/src/exchange-tools/taler-exchange-wire.c @@ -0,0 +1,201 @@ +/* + This file is part of TALER + Copyright (C) 2015, 2016 Inria + + 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-exchange-wire.c + * @brief Create signed response for /wire requests. + * @author Christian Grothoff + */ +#include <platform.h> +#include <jansson.h> +#include <gnunet/gnunet_json_lib.h> +#include "taler_crypto_lib.h" +#include "taler_wire_plugin.h" +#include "taler_signatures.h" + + +/** + * Filename of the master private key. + */ +static char *masterkeyfile; + +/** + * Account holder information in JSON format. + */ +static char *json_in; + +/** + * Which wire method is this for? + */ +static char *method; + +/** + * Where to write the result. + */ +static char *output_filename; + + +/** + * The main function of the taler-exchange-sepa tool. This tool is used + * to sign the SEPA bank account details using the master key. + * + * @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[] = { + {'j', "json", "JSON", + "account information in JSON format", 1, + &GNUNET_GETOPT_set_string, &json_in}, + {'m', "master-key", "FILE", + "master key file (private key)", 1, + &GNUNET_GETOPT_set_filename, &masterkeyfile}, + {'t', "type", "METHOD", + "which wire transfer method (i.e. 'test' or 'sepa') is this for?", 1, + &GNUNET_GETOPT_set_filename, &method}, + {'o', "output", "FILE", + "where to write the result", 1, + &GNUNET_GETOPT_set_filename, &output_filename}, + TALER_GETOPT_OPTION_HELP ("Setup /wire response"), + GNUNET_GETOPT_OPTION_VERSION (VERSION "-" VCS_VERSION), + GNUNET_GETOPT_OPTION_END + }; + struct GNUNET_CRYPTO_EddsaPrivateKey *eddsa_priv; + struct TALER_MasterPrivateKeyP key; + struct TALER_MasterSignatureP sig; + json_t *j; + json_error_t err; + char *json_out; + struct GNUNET_HashCode salt; + char *lib_name; + struct TALER_WIRE_Plugin *plugin; + + GNUNET_assert (GNUNET_OK == + GNUNET_log_setup ("taler-exchange-wire", + "WARNING", + NULL)); + + if (GNUNET_GETOPT_run ("taler-exchange-wire", + options, + argc, argv) < 0) + return 1; + if (NULL == masterkeyfile) + { + fprintf (stderr, + "Master key file not given\n"); + return 1; + } + eddsa_priv = GNUNET_CRYPTO_eddsa_key_create_from_file (masterkeyfile); + if (NULL == eddsa_priv) + { + fprintf (stderr, + "Failed to initialize master key from file `%s'\n", + masterkeyfile); + return 1; + } + if (NULL == json_in) + { + fprintf (stderr, + "Required -j argument missing\n"); + return 1; + } + if (NULL == method) + { + fprintf (stderr, + "Required -t argument missing\n"); + return 1; + } + j = json_loads (json_in, + JSON_REJECT_DUPLICATES, + &err); + if (NULL == j) + { + fprintf (stderr, + "Failed to parse JSON: %s (at offset %u)\n", + err.text, + (unsigned int) err.position); + return 1; + } + key.eddsa_priv = *eddsa_priv; + GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_NONCE, + &salt, + sizeof (salt)); + (void) GNUNET_asprintf (&lib_name, + "libtaler_plugin_wire_%s", + method); + plugin = GNUNET_PLUGIN_load (lib_name, + NULL); + if (NULL == plugin) + { + GNUNET_free (lib_name); + GNUNET_log (GNUNET_ERROR_TYPE_INFO, + "Wire transfer method `%s' not supported\n", + method); + return 1; + } + plugin->library_name = lib_name; + if (GNUNET_OK != + plugin->sign_wire_details (plugin->cls, + j, + &key, + &salt, + &sig)) + { + /* sign function should have logged applicable errors */ + json_decref (j); + GNUNET_PLUGIN_unload (lib_name, + plugin); + GNUNET_free (lib_name); + return 1; + } + GNUNET_PLUGIN_unload (lib_name, + plugin); + GNUNET_free (lib_name); + GNUNET_free (eddsa_priv); + + /* add signature and salt to JSON message */ + json_object_set_new (j, + "salt", + GNUNET_JSON_from_data (&salt, + sizeof (salt))); + json_object_set_new (j, + "sig", + GNUNET_JSON_from_data (&sig, + sizeof (sig))); + + /* dump result to stdout */ + json_out = json_dumps (j, JSON_INDENT(2)); + json_decref (j); + GNUNET_assert (NULL != json_out); + + if (NULL != output_filename) + { + fclose (stdout); + stdout = fopen (output_filename, + "w+"); + } + fprintf (stdout, + "%s", + json_out); + fflush (stdout); + free (json_out); + return 0; +} + +/* end of taler-exchange-wire.c */ |