2021-01-10 00:54:12 +01:00
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/*
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This file is part of TALER
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2021-10-22 23:38:32 +02:00
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Copyright (C) 2020, 2021 Taler Systems SA
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2021-01-10 00:54:12 +01:00
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file secmod_signatures.c
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* @brief Utility functions for Taler security module signatures
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include "taler_util.h"
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#include "taler_signatures.h"
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2021-11-06 16:52:14 +01:00
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void
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TALER_wallet_deposit_sign (
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const struct TALER_Amount *amount,
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const struct TALER_Amount *deposit_fee,
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const struct TALER_MerchantWireHash *h_wire,
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const struct TALER_PrivateContractHash *h_contract_terms,
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const struct TALER_ExtensionContractHash *h_extensions,
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const struct TALER_DenominationHash *h_denom_pub,
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struct GNUNET_TIME_Absolute wallet_timestamp,
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const struct TALER_MerchantPublicKeyP *merchant_pub,
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struct GNUNET_TIME_Absolute refund_deadline,
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const struct TALER_CoinSpendPrivateKeyP *coin_priv,
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struct TALER_CoinSpendSignatureP *coin_sig)
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{
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struct TALER_DepositRequestPS dr = {
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.purpose.size = htonl (sizeof (dr)),
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.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_DEPOSIT),
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.h_contract_terms = *h_contract_terms,
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.h_wire = *h_wire,
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.h_denom_pub = *h_denom_pub,
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.wallet_timestamp = GNUNET_TIME_absolute_hton (wallet_timestamp),
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.refund_deadline = GNUNET_TIME_absolute_hton (refund_deadline),
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.merchant = *merchant_pub
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};
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2021-11-06 17:26:11 +01:00
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if (NULL != h_extensions)
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dr.h_extensions = *h_extensions;
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2021-11-06 16:52:14 +01:00
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GNUNET_assert (GNUNET_OK ==
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GNUNET_TIME_round_abs (&wallet_timestamp));
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GNUNET_assert (GNUNET_OK ==
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GNUNET_TIME_round_abs (&refund_deadline));
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TALER_amount_hton (&dr.amount_with_fee,
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amount);
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TALER_amount_hton (&dr.deposit_fee,
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deposit_fee);
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GNUNET_CRYPTO_eddsa_sign (&coin_priv->eddsa_priv,
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&dr,
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&coin_sig->eddsa_signature);
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}
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enum GNUNET_GenericReturnValue
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TALER_wallet_deposit_verify (
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const struct TALER_Amount *amount,
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const struct TALER_Amount *deposit_fee,
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const struct TALER_MerchantWireHash *h_wire,
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const struct TALER_PrivateContractHash *h_contract_terms,
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const struct TALER_ExtensionContractHash *h_extensions,
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const struct TALER_DenominationHash *h_denom_pub,
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struct GNUNET_TIME_Absolute wallet_timestamp,
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const struct TALER_MerchantPublicKeyP *merchant_pub,
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struct GNUNET_TIME_Absolute refund_deadline,
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const struct TALER_CoinSpendPublicKeyP *coin_pub,
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const struct TALER_CoinSpendSignatureP *coin_sig)
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{
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struct TALER_DepositRequestPS dr = {
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.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_DEPOSIT),
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.purpose.size = htonl (sizeof (dr)),
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.h_contract_terms = *h_contract_terms,
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.h_wire = *h_wire,
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.h_denom_pub = *h_denom_pub,
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.wallet_timestamp = GNUNET_TIME_absolute_hton (wallet_timestamp),
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.refund_deadline = GNUNET_TIME_absolute_hton (refund_deadline),
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.merchant = *merchant_pub
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};
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2021-11-06 17:26:11 +01:00
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if (NULL != h_extensions)
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dr.h_extensions = *h_extensions;
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2021-11-06 16:52:14 +01:00
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TALER_amount_hton (&dr.amount_with_fee,
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amount);
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TALER_amount_hton (&dr.deposit_fee,
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deposit_fee);
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if (GNUNET_OK !=
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GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_COIN_DEPOSIT,
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&dr,
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&coin_sig->eddsa_signature,
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&coin_pub->eddsa_pub))
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{
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GNUNET_break_op (0);
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return GNUNET_SYSERR;
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}
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return GNUNET_OK;
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}
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2021-01-10 00:54:12 +01:00
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void
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2021-10-22 23:38:32 +02:00
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TALER_wallet_link_sign (const struct TALER_DenominationHash *h_denom_pub,
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const struct TALER_TransferPublicKeyP *transfer_pub,
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const void *coin_ev,
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size_t coin_ev_size,
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const struct TALER_CoinSpendPrivateKeyP *old_coin_priv,
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struct TALER_CoinSpendSignatureP *coin_sig)
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{
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struct TALER_LinkDataPS ldp = {
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.purpose.size = htonl (sizeof (ldp)),
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.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_LINK),
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.h_denom_pub = *h_denom_pub,
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.transfer_pub = *transfer_pub
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};
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GNUNET_CRYPTO_hash (coin_ev,
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coin_ev_size,
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&ldp.coin_envelope_hash.hash);
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GNUNET_CRYPTO_eddsa_sign (&old_coin_priv->eddsa_priv,
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&ldp,
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&coin_sig->eddsa_signature);
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}
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enum GNUNET_GenericReturnValue
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TALER_wallet_link_verify (
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const struct TALER_DenominationHash *h_denom_pub,
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2021-01-10 00:54:12 +01:00
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const struct TALER_TransferPublicKeyP *transfer_pub,
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const void *coin_ev,
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size_t coin_ev_size,
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const struct TALER_CoinSpendPublicKeyP *old_coin_pub,
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const struct TALER_CoinSpendSignatureP *coin_sig)
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{
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struct TALER_LinkDataPS ldp = {
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.purpose.size = htonl (sizeof (ldp)),
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.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_LINK),
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.h_denom_pub = *h_denom_pub,
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.transfer_pub = *transfer_pub
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};
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GNUNET_CRYPTO_hash (coin_ev,
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coin_ev_size,
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&ldp.coin_envelope_hash.hash);
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return
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GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_COIN_LINK,
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&ldp,
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&coin_sig->eddsa_signature,
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&old_coin_pub->eddsa_pub);
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}
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/* end of wallet_signatures.c */
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