78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2020 Taler Systems SA
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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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void
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TALER_wallet_link_sign (const struct GNUNET_HashCode *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);
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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 GNUNET_HashCode *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_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);
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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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