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/*
This file is part of TALER
Copyright (C) 2021, 2022 Taler Systems SA
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, see <http://www.gnu.org/licenses/>
*/
/**
* @file exchange_signatures.c
* @brief Utility functions for Taler security module signatures
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_signatures.h"
enum GNUNET_GenericReturnValue
TALER_exchange_deposit_confirm_verify (
const struct TALER_PrivateContractHashP *h_contract_terms,
const struct TALER_MerchantWireHashP *h_wire,
const struct TALER_ExtensionContractHashP *h_extensions,
struct GNUNET_TIME_Timestamp exchange_timestamp,
struct GNUNET_TIME_Timestamp wire_deadline,
struct GNUNET_TIME_Timestamp refund_deadline,
const struct TALER_Amount *amount_without_fee,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct TALER_ExchangePublicKeyP *exchange_pub,
const struct TALER_ExchangeSignatureP *exchange_sig)
{
struct TALER_DepositConfirmationPS dcs = {
.purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_CONFIRM_DEPOSIT),
.purpose.size = htonl (sizeof (struct TALER_DepositConfirmationPS)),
.h_contract_terms = *h_contract_terms,
.h_wire = *h_wire,
.exchange_timestamp = GNUNET_TIME_timestamp_hton (exchange_timestamp),
.wire_deadline = GNUNET_TIME_timestamp_hton (wire_deadline),
.refund_deadline = GNUNET_TIME_timestamp_hton (refund_deadline),
.coin_pub = *coin_pub,
.merchant_pub = *merchant_pub
};
if (NULL != h_extensions)
dcs.h_extensions = *h_extensions;
TALER_amount_hton (&dcs.amount_without_fee,
amount_without_fee);
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_EXCHANGE_CONFIRM_DEPOSIT,
&dcs,
&exchange_sig->eddsa_signature,
&exchange_pub->eddsa_pub))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
enum GNUNET_GenericReturnValue
TALER_exchange_melt_confirmation_verify (
const struct TALER_RefreshCommitmentP *rc,
uint32_t noreveal_index,
const struct TALER_ExchangePublicKeyP *exchange_pub,
const struct TALER_ExchangeSignatureP *exchange_sig)
{
struct TALER_RefreshMeltConfirmationPS confirm = {
.purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_CONFIRM_MELT),
.purpose.size = htonl (sizeof (confirm)),
.rc = *rc,
.noreveal_index = htonl (noreveal_index)
};
return
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_EXCHANGE_CONFIRM_MELT,
&confirm,
&exchange_sig->eddsa_signature,
&exchange_pub->eddsa_pub);
}
/* end of exchange_signatures.c */
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