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Diffstat (limited to 'src/backend-lib/merchant_api_deposit.c')
| -rw-r--r-- | src/backend-lib/merchant_api_deposit.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/backend-lib/merchant_api_deposit.c b/src/backend-lib/merchant_api_deposit.c new file mode 100644 index 00000000..a3cae20c --- /dev/null +++ b/src/backend-lib/merchant_api_deposit.c @@ -0,0 +1,111 @@ +/* + 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 merchant/merchant_db.c + * @brief DB and crypto work related to deposit management + * @author Marcello Stanisci + */ + + +#include "platform.h" +#include <jansson.h> +#include <taler/taler_signatures.h> +#include <gnunet/gnunet_util_lib.h> +#include <taler/taler_util.h> +#include "merchant.h" +#include "merchant_db.h" +#include "taler_merchant_contract_lib.h" + +/** +* Verify the signature on a successful deposit permission +* @param h_contract the hashed stringification of this contract +* @param h_wire the hashed 'wire' object holdign the merchant bank's details +* @param timestamp the 32bit wide number representing the number of seconds +* since the Epoch +* @param refund the refund deadline for this deal, expressed in seconds as @a +* timestamp +* @param trans_id an id number for this deal +* @param amount_minus_fee what paid minus its deposit fee +* @param coin_pub the coin's public key +* @param sig the mint's signature +* @param mint_pub mint's key to verify this signature against +* @return GNUNET_OK if the verification succeeds, GNUNET_NO if not, +* GNUNET_SYSERR upon errors +*/ + +uint32_t +MERCHANT_verify_confirmation (const struct GNUNET_HashCode *h_contract, + const struct GNUNET_HashCode *h_wire, + struct GNUNET_TIME_Absolute timestamp, + struct GNUNET_TIME_Absolute refund, + uint64_t trans_id, + const struct TALER_Amount *amount_minus_fee, + const struct TALER_CoinSpendPublicKeyP *coin, + const struct TALER_MerchantPublicKeyP *merchant, + const struct GNUNET_CRYPTO_EddsaSignature *sig, + const struct TALER_MintPublicKeyP *mint_pub) +{ + struct TALER_DepositConfirmationPS dc; + + dc.h_contract = *h_contract; + dc.h_wire = *h_wire; + + dc.merchant = *merchant; + dc.coin_pub = *coin; + + dc.timestamp = GNUNET_TIME_absolute_hton (timestamp); + dc.refund_deadline = GNUNET_TIME_absolute_hton (refund); + TALER_amount_hton (&dc.amount_without_fee, amount_minus_fee); + dc.transaction_id = GNUNET_htonll (trans_id); + + #ifdef DEBUG + char *hwire_enc; + char *hcontract_enc; + char *merchant_enc; + char *coinpub_enc; + + hwire_enc = GNUNET_STRINGS_data_to_string_alloc (h_wire, sizeof (struct GNUNET_HashCode)); + hcontract_enc = GNUNET_STRINGS_data_to_string_alloc (h_contract, sizeof (struct GNUNET_HashCode)); + merchant_enc = GNUNET_STRINGS_data_to_string_alloc (&merchant.eddsa_pub, sizeof (struct GNUNET_CRYPTO_EddsaPublicKey)); + coinpub_enc = GNUNET_STRINGS_data_to_string_alloc (&coin.eddsa_pub, sizeof (struct GNUNET_CRYPTO_EddsaPublicKey)); + + printf ("Signing Confirmation:\nH_wire: %s\nH_contract: %s\nmerchant_pub: %s\ncoin_pub: %s\n" + "timestamp: %llu,\nrefund: %llu,\namount: %s %llu.%lu,\ntrid: %llu\n", + hwire_enc, + hcontract_enc, + merchant_enc, + coinpub_enc, + timestamp_abs.abs_value_us, + refund_abs.abs_value_us, + amount_minus_fee->currency, + amount_minus_fee->value, + amount_minus_fee->fraction, + trans_id); + #endif + + dc.purpose.purpose = htonl (TALER_SIGNATURE_MINT_CONFIRM_DEPOSIT); + dc.purpose.size = htonl (sizeof (struct TALER_DepositConfirmationPS)); + + if (GNUNET_SYSERR == + GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MINT_CONFIRM_DEPOSIT, + &dc.purpose, + sig, + &mint_pub->eddsa_pub)) + return GNUNET_NO; + return GNUNET_OK; +} + |