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Diffstat (limited to 'src/exchange-tools/taler-auditor-sign.c')
| -rw-r--r-- | src/exchange-tools/taler-auditor-sign.c | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/src/exchange-tools/taler-auditor-sign.c b/src/exchange-tools/taler-auditor-sign.c new file mode 100644 index 000000000..e4821f411 --- /dev/null +++ b/src/exchange-tools/taler-auditor-sign.c @@ -0,0 +1,321 @@ +/* + This file is part of TALER + Copyright (C) 2014, 2015 GNUnet e.V. + + 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-auditor-sign.c + * @brief Tool used by the auditor to sign the exchange's master key and the + * denomination key(s). + * @author Christian Grothoff + */ +#include <platform.h> +#include "taler_exchangedb_lib.h" + + +/** + * Are we running in verbose mode? + */ +static int verbose; + +/** + * Filename of the auditor's private key. + */ +static char *auditor_key_file; + +/** + * Exchange's public key (in Crockford base32 encoding). + */ +static char *exchange_public_key; + +/** + * File with the Exchange's denomination keys to sign, itself + * signed by the Exchange's public key. + */ +static char *exchange_request_file; + +/** + * Where should we write the auditor's signature? + */ +static char *output_file; + +/** + * Master public key of the exchange. + */ +static struct TALER_MasterPublicKeyP master_public_key; + + +/** + * Print denomination key details for diagnostics. + * + * @param dk denomination key to print + */ +static void +print_dk (const struct TALER_DenominationKeyValidityPS *dk) +{ + struct TALER_Amount a; + char *s; + + fprintf (stdout, + "Denomination key hash: %s\n", + GNUNET_h2s_full (&dk->denom_hash)); + TALER_amount_ntoh (&a, + &dk->value); + fprintf (stdout, + "Value: %s\n", + s = TALER_amount_to_string (&a)); + GNUNET_free (s); + TALER_amount_ntoh (&a, + &dk->fee_withdraw); + fprintf (stdout, + "Withdraw fee: %s\n", + s = TALER_amount_to_string (&a)); + GNUNET_free (s); + TALER_amount_ntoh (&a, + &dk->fee_deposit); + fprintf (stdout, + "Deposit fee: %s\n", + s = TALER_amount_to_string (&a)); + GNUNET_free (s); + TALER_amount_ntoh (&a, + &dk->fee_refresh); + fprintf (stdout, + "Refresh fee: %s\n", + s = TALER_amount_to_string (&a)); + GNUNET_free (s); + + fprintf (stdout, + "Validity start time: %s\n", + GNUNET_STRINGS_absolute_time_to_string (GNUNET_TIME_absolute_ntoh (dk->start))); + fprintf (stdout, + "Withdraw end time: %s\n", + GNUNET_STRINGS_absolute_time_to_string (GNUNET_TIME_absolute_ntoh (dk->expire_withdraw))); + fprintf (stdout, + "Deposit end time: %s\n", + GNUNET_STRINGS_absolute_time_to_string (GNUNET_TIME_absolute_ntoh (dk->expire_spend))); + fprintf (stdout, + "Legal dispute end time: %s\n", + GNUNET_STRINGS_absolute_time_to_string (GNUNET_TIME_absolute_ntoh (dk->expire_legal))); + + fprintf (stdout, + "\n"); +} + + +/** + * The main function of the taler-auditor-sign tool. This tool is used + * to sign a exchange's master and denomination keys, affirming that the + * auditor is aware of them and will validate the exchange's database with + * respect to these keys. + * + * @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[] = { + {'a', "auditor-key", "FILE", + "file containing the private key of the auditor", 1, + &GNUNET_GETOPT_set_filename, &auditor_key_file}, + TALER_GETOPT_OPTION_HELP ("Private key of the auditor to use for signing"), + {'m', "exchange-key", "KEY", + "public key of the exchange (Crockford base32 encoded)", 1, + &GNUNET_GETOPT_set_filename, &exchange_public_key}, + {'r', "exchange-request", "FILE", + "set of keys the exchange requested the auditor to sign", 1, + &GNUNET_GETOPT_set_string, &exchange_request_file}, + {'o', "output", "FILE", + "where to write our signature", 1, + &GNUNET_GETOPT_set_string, &output_file}, + GNUNET_GETOPT_OPTION_VERSION (VERSION "-" VCS_VERSION), + GNUNET_GETOPT_OPTION_VERBOSE (&verbose), + GNUNET_GETOPT_OPTION_END + }; + struct GNUNET_CRYPTO_EddsaPrivateKey *eddsa_priv; + struct TALER_AuditorSignatureP *sigs; + struct TALER_AuditorPublicKeyP apub; + struct GNUNET_DISK_FileHandle *fh; + struct TALER_DenominationKeyValidityPS *dks; + unsigned int dks_len; + struct TALER_ExchangeKeyValidityPS kv; + off_t in_size; + unsigned int i; + + GNUNET_assert (GNUNET_OK == + GNUNET_log_setup ("taler-exchange-keyup", + "WARNING", + NULL)); + if (GNUNET_GETOPT_run ("taler-exchange-keyup", + options, + argc, argv) < 0) + return 1; + if (NULL == auditor_key_file) + { + fprintf (stderr, + "Auditor key file not given\n"); + return 1; + } + eddsa_priv = GNUNET_CRYPTO_eddsa_key_create_from_file (auditor_key_file); + if (NULL == eddsa_priv) + { + fprintf (stderr, + "Failed to initialize auditor key from file `%s'\n", + auditor_key_file); + return 1; + } + GNUNET_CRYPTO_eddsa_key_get_public (eddsa_priv, + &apub.eddsa_pub); + if (NULL == exchange_public_key) + { + fprintf (stderr, + "Exchange public key not given\n"); + GNUNET_free (eddsa_priv); + return 1; + } + if (GNUNET_OK != + GNUNET_STRINGS_string_to_data (exchange_public_key, + strlen (exchange_public_key), + &master_public_key, + sizeof (master_public_key))) + { + fprintf (stderr, + "Public key `%s' malformed\n", + exchange_public_key); + GNUNET_free (eddsa_priv); + return 1; + } + if (NULL == exchange_request_file) + { + fprintf (stderr, + "Exchange signing request not given\n"); + GNUNET_free (eddsa_priv); + return 1; + } + fh = GNUNET_DISK_file_open (exchange_request_file, + GNUNET_DISK_OPEN_READ, + GNUNET_DISK_PERM_NONE); + if (NULL == fh) + { + fprintf (stderr, + "Failed to open file `%s': %s\n", + exchange_request_file, + STRERROR (errno)); + GNUNET_free (eddsa_priv); + return 1; + } + if (GNUNET_OK != + GNUNET_DISK_file_handle_size (fh, + &in_size)) + { + fprintf (stderr, + "Failed to obtain input file size `%s': %s\n", + exchange_request_file, + STRERROR (errno)); + GNUNET_DISK_file_close (fh); + GNUNET_free (eddsa_priv); + return 1; + } + if (0 != (in_size % sizeof (struct TALER_DenominationKeyValidityPS))) + { + fprintf (stderr, + "Input file size of file `%s' is invalid\n", + exchange_request_file); + GNUNET_DISK_file_close (fh); + GNUNET_free (eddsa_priv); + return 1; + } + dks_len = in_size / sizeof (struct TALER_DenominationKeyValidityPS); + kv.purpose.purpose = htonl (TALER_SIGNATURE_AUDITOR_EXCHANGE_KEYS); + kv.purpose.size = htonl (sizeof (struct TALER_ExchangeKeyValidityPS)); + kv.master = master_public_key; + dks = GNUNET_new_array (dks_len, + struct TALER_DenominationKeyValidityPS); + sigs = GNUNET_new_array (dks_len, + struct TALER_AuditorSignatureP); + if (in_size != + GNUNET_DISK_file_read (fh, + dks, + in_size)) + { + fprintf (stderr, + "Failed to read input file `%s': %s\n", + exchange_request_file, + STRERROR (errno)); + GNUNET_DISK_file_close (fh); + GNUNET_free (sigs); + GNUNET_free (dks); + GNUNET_free (eddsa_priv); + return 1; + } + GNUNET_DISK_file_close (fh); + for (i=0;i<dks_len;i++) + { + struct TALER_DenominationKeyValidityPS *dk = &dks[i]; + + if (verbose) + print_dk (dk); + kv.start = dk->start; + kv.expire_withdraw = dk->expire_withdraw; + kv.expire_spend = dk->expire_spend; + kv.expire_legal = dk->expire_legal; + kv.value = dk->value; + kv.fee_withdraw = dk->fee_withdraw; + kv.fee_deposit = dk->fee_deposit; + kv.fee_refresh = dk->fee_refresh; + kv.denom_hash = dk->denom_hash; + + /* Finally sign ... */ + GNUNET_CRYPTO_eddsa_sign (eddsa_priv, + &kv.purpose, + &sigs[i].eddsa_sig); + + + } + + if (NULL == output_file) + { + fprintf (stderr, + "Output file not given\n"); + GNUNET_free (dks); + GNUNET_free (sigs); + GNUNET_free (eddsa_priv); + return 1; + } + + /* write result to disk */ + if (GNUNET_OK != + TALER_EXCHANGEDB_auditor_write (output_file, + &apub, + sigs, + &master_public_key, + dks_len, + dks)) + { + fprintf (stderr, + "Failed to write to file `%s': %s\n", + output_file, + STRERROR (errno)); + GNUNET_free (sigs); + GNUNET_free (dks); + return 1; + } + GNUNET_free (sigs); + GNUNET_free (dks); + GNUNET_free (eddsa_priv); + return 0; +} + +/* end of taler-auditor-sign.c */ |