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/*
This file is part of TALER
Copyright (C) 2024 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 kyc_signatures.c
* @brief Utility functions for KYC account holders
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_signatures.h"
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Format used to generate the signature on a
* KYC authorization.
*/
struct TALER_KycQueryPS
{
/**
* Purpose must be #TALER_SIGNATURE_KYC_AUTH.
* Used for an EdDSA signature with the `union TALER_AccountPublicKeyP`.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_account_kyc_auth_sign (
const union TALER_AccountPrivateKeyP *account_priv,
union TALER_AccountSignatureP *account_sig)
{
struct TALER_KycQueryPS aq = {
.purpose.purpose = htonl (TALER_SIGNATURE_KYC_AUTH),
.purpose.size = htonl (sizeof (aq))
};
GNUNET_CRYPTO_eddsa_sign (
&account_priv->reserve_priv.eddsa_priv,
&aq,
&account_sig->reserve_sig.eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_account_kyc_auth_verify (
const union TALER_AccountPublicKeyP *account_pub,
const union TALER_AccountSignatureP *account_sig)
{
struct TALER_KycQueryPS aq = {
.purpose.purpose = htonl (TALER_SIGNATURE_KYC_AUTH),
.purpose.size = htonl (sizeof (aq))
};
return GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_KYC_AUTH,
&aq,
&account_sig->reserve_sig.eddsa_signature,
&account_pub->reserve_pub.eddsa_pub);
}
/* end of kyc_signatures.c */
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