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/*
This file is part of TALER
Copyright (C) 2018 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 util/crypto_wire.c
* @brief functions for making and verifying /wire account signatures
* @author Christian Grothoff <christian@grothoff.org>
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_signatures.h"
enum GNUNET_GenericReturnValue
TALER_exchange_wire_signature_check (
const char *payto_uri,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterWireDetailsPS wd = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_DETAILS),
.purpose.size = htonl (sizeof (wd))
};
TALER_payto_hash (payto_uri,
&wd.h_wire_details);
return GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_WIRE_DETAILS,
&wd,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_wire_signature_make (
const char *payto_uri,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterWireDetailsPS wd = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_DETAILS),
.purpose.size = htonl (sizeof (wd))
};
TALER_payto_hash (payto_uri,
&wd.h_wire_details);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&wd,
&master_sig->eddsa_signature);
}
void
TALER_merchant_wire_signature_hash (const char *payto_uri,
const struct TALER_WireSaltP *salt,
struct TALER_MerchantWireHash *hc)
{
GNUNET_assert (GNUNET_YES ==
GNUNET_CRYPTO_kdf (hc,
sizeof (*hc),
salt,
sizeof (*salt),
payto_uri,
strlen (payto_uri) + 1,
"merchant-wire-signature",
strlen ("merchant-wire-signature"),
NULL, 0));
}
enum GNUNET_GenericReturnValue
TALER_merchant_wire_signature_check (
const char *payto_uri,
const struct TALER_WireSaltP *salt,
const struct TALER_MerchantPublicKeyP *merch_pub,
const struct TALER_MerchantSignatureP *merch_sig)
{
struct TALER_MerchantWireDetailsPS wd = {
.purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_WIRE_DETAILS),
.purpose.size = htonl (sizeof (wd))
};
TALER_merchant_wire_signature_hash (payto_uri,
salt,
&wd.h_wire_details);
return GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MERCHANT_WIRE_DETAILS,
&wd,
&merch_sig->eddsa_sig,
&merch_pub->eddsa_pub);
}
void
TALER_merchant_wire_signature_make (
const char *payto_uri,
const struct TALER_WireSaltP *salt,
const struct TALER_MerchantPrivateKeyP *merch_priv,
struct TALER_MerchantSignatureP *merch_sig)
{
struct TALER_MerchantWireDetailsPS wd = {
.purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_WIRE_DETAILS),
.purpose.size = htonl (sizeof (wd))
};
TALER_merchant_wire_signature_hash (payto_uri,
salt,
&wd.h_wire_details);
GNUNET_CRYPTO_eddsa_sign (&merch_priv->eddsa_priv,
&wd,
&merch_sig->eddsa_sig);
}
/* end of crypto_wire.c */
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