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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 auditor_signatures.c
* @brief Utility functions for Taler auditor signatures
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_signatures.h"
void
TALER_auditor_denom_validity_sign (
const char *auditor_url,
const struct GNUNET_HashCode *h_denom_pub,
const struct TALER_MasterPublicKeyP *master_pub,
struct GNUNET_TIME_Absolute stamp_start,
struct GNUNET_TIME_Absolute stamp_expire_withdraw,
struct GNUNET_TIME_Absolute stamp_expire_deposit,
struct GNUNET_TIME_Absolute stamp_expire_legal,
const struct TALER_Amount *coin_value,
const struct TALER_Amount *fee_withdraw,
const struct TALER_Amount *fee_deposit,
const struct TALER_Amount *fee_refresh,
const struct TALER_Amount *fee_refund,
const struct TALER_AuditorPrivateKeyP *auditor_priv,
struct TALER_AuditorSignatureP *auditor_sig)
{
struct TALER_ExchangeKeyValidityPS kv = {
.purpose.purpose = htonl (TALER_SIGNATURE_AUDITOR_EXCHANGE_KEYS),
.purpose.size = htonl (sizeof (kv)),
.start = GNUNET_TIME_absolute_hton (stamp_start),
.expire_withdraw = GNUNET_TIME_absolute_hton (stamp_expire_withdraw),
.expire_deposit = GNUNET_TIME_absolute_hton (stamp_expire_deposit),
.expire_legal = GNUNET_TIME_absolute_hton (stamp_expire_legal),
.denom_hash = *h_denom_pub,
.master = *master_pub,
};
TALER_amount_hton (&kv.value,
coin_value);
TALER_amount_hton (&kv.fee_withdraw,
fee_withdraw);
TALER_amount_hton (&kv.fee_deposit,
fee_deposit);
TALER_amount_hton (&kv.fee_refresh,
fee_refresh);
TALER_amount_hton (&kv.fee_refund,
fee_refund);
GNUNET_CRYPTO_hash (auditor_url,
strlen (auditor_url) + 1,
&kv.auditor_url_hash);
GNUNET_CRYPTO_eddsa_sign (&auditor_priv->eddsa_priv,
&kv,
&auditor_sig->eddsa_sig);
}
enum GNUNET_GenericReturnValue
TALER_auditor_denom_validity_verify (
const char *auditor_url,
const struct GNUNET_HashCode *h_denom_pub,
const struct TALER_MasterPublicKeyP *master_pub,
struct GNUNET_TIME_Absolute stamp_start,
struct GNUNET_TIME_Absolute stamp_expire_withdraw,
struct GNUNET_TIME_Absolute stamp_expire_deposit,
struct GNUNET_TIME_Absolute stamp_expire_legal,
const struct TALER_Amount *coin_value,
const struct TALER_Amount *fee_withdraw,
const struct TALER_Amount *fee_deposit,
const struct TALER_Amount *fee_refresh,
const struct TALER_Amount *fee_refund,
const struct TALER_AuditorPublicKeyP *auditor_pub,
const struct TALER_AuditorSignatureP *auditor_sig)
{
struct TALER_ExchangeKeyValidityPS kv = {
.purpose.purpose = htonl (TALER_SIGNATURE_AUDITOR_EXCHANGE_KEYS),
.purpose.size = htonl (sizeof (kv)),
.start = GNUNET_TIME_absolute_hton (stamp_start),
.expire_withdraw = GNUNET_TIME_absolute_hton (stamp_expire_withdraw),
.expire_deposit = GNUNET_TIME_absolute_hton (stamp_expire_deposit),
.expire_legal = GNUNET_TIME_absolute_hton (stamp_expire_legal),
.denom_hash = *h_denom_pub,
.master = *master_pub,
};
TALER_amount_hton (&kv.value,
coin_value);
TALER_amount_hton (&kv.fee_withdraw,
fee_withdraw);
TALER_amount_hton (&kv.fee_deposit,
fee_deposit);
TALER_amount_hton (&kv.fee_refresh,
fee_refresh);
TALER_amount_hton (&kv.fee_refund,
fee_refund);
GNUNET_CRYPTO_hash (auditor_url,
strlen (auditor_url) + 1,
&kv.auditor_url_hash);
return
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_AUDITOR_EXCHANGE_KEYS,
&kv,
&auditor_sig->eddsa_sig,
&auditor_pub->eddsa_pub);
}
/* end of auditor_signatures.c */
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