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/*
This file is part of TALER
Copyright (C) 2020 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 merchant_signatures.c
* @brief Utility functions for Taler merchant signatures
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_signatures.h"
void
TALER_merchant_refund_sign (
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_PrivateContractHash *h_contract_terms,
uint64_t rtransaction_id,
const struct TALER_Amount *amount,
const struct TALER_MerchantPrivateKeyP *merchant_priv,
struct TALER_MerchantSignatureP *merchant_sig)
{
struct TALER_RefundRequestPS rr = {
.purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_REFUND),
.purpose.size = htonl (sizeof (rr)),
.h_contract_terms = *h_contract_terms,
.coin_pub = *coin_pub,
.rtransaction_id = GNUNET_htonll (rtransaction_id)
};
TALER_amount_hton (&rr.refund_amount,
amount);
GNUNET_CRYPTO_eddsa_sign (&merchant_priv->eddsa_priv,
&rr,
&merchant_sig->eddsa_sig);
}
enum GNUNET_GenericReturnValue
TALER_merchant_refund_verify (
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_PrivateContractHash *h_contract_terms,
uint64_t rtransaction_id,
const struct TALER_Amount *amount,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct TALER_MerchantSignatureP *merchant_sig)
{
struct TALER_RefundRequestPS rr = {
.purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_REFUND),
.purpose.size = htonl (sizeof (rr)),
.h_contract_terms = *h_contract_terms,
.coin_pub = *coin_pub,
.rtransaction_id = GNUNET_htonll (rtransaction_id)
};
TALER_amount_hton (&rr.refund_amount,
amount);
return
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MERCHANT_REFUND,
&rr,
&merchant_sig->eddsa_sig,
&merchant_pub->eddsa_pub);
}
/* end of merchant_signatures.c */
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