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-rw-r--r--src/exchange-tools/taler-exchange-wire.c201
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
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+++ b/src/exchange-tools/taler-exchange-wire.c
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+/*
+ 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 */