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/*
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;
}
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