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/*
This file is part of TALER
Copyright (C) 2020, 2021 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 offline_signatures.c
* @brief Utility functions for Taler exchange offline signatures
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_signatures.h"
void
TALER_exchange_offline_auditor_add_sign (
const struct TALER_AuditorPublicKeyP *auditor_pub,
const char *auditor_url,
struct GNUNET_TIME_Timestamp start_date,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterAddAuditorPS kv = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_ADD_AUDITOR),
.purpose.size = htonl (sizeof (kv)),
.start_date = GNUNET_TIME_timestamp_hton (start_date),
.auditor_pub = *auditor_pub,
};
GNUNET_CRYPTO_hash (auditor_url,
strlen (auditor_url) + 1,
&kv.h_auditor_url);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&kv,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_auditor_add_verify (
const struct TALER_AuditorPublicKeyP *auditor_pub,
const char *auditor_url,
struct GNUNET_TIME_Timestamp start_date,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterAddAuditorPS aa = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_ADD_AUDITOR),
.purpose.size = htonl (sizeof (aa)),
.start_date = GNUNET_TIME_timestamp_hton (start_date),
.auditor_pub = *auditor_pub
};
GNUNET_CRYPTO_hash (auditor_url,
strlen (auditor_url) + 1,
&aa.h_auditor_url);
return GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_ADD_AUDITOR,
&aa,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_auditor_del_sign (
const struct TALER_AuditorPublicKeyP *auditor_pub,
struct GNUNET_TIME_Timestamp end_date,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterDelAuditorPS kv = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_DEL_AUDITOR),
.purpose.size = htonl (sizeof (kv)),
.end_date = GNUNET_TIME_timestamp_hton (end_date),
.auditor_pub = *auditor_pub,
};
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&kv,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_auditor_del_verify (
const struct TALER_AuditorPublicKeyP *auditor_pub,
struct GNUNET_TIME_Timestamp end_date,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterDelAuditorPS da = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_DEL_AUDITOR),
.purpose.size = htonl (sizeof (da)),
.end_date = GNUNET_TIME_timestamp_hton (end_date),
.auditor_pub = *auditor_pub
};
return GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_DEL_AUDITOR,
&da,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_denomination_revoke_sign (
const struct TALER_DenominationHash *h_denom_pub,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterDenominationKeyRevocationPS rm = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED),
.purpose.size = htonl (sizeof (rm)),
.h_denom_pub = *h_denom_pub
};
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&rm,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_denomination_revoke_verify (
const struct TALER_DenominationHash *h_denom_pub,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterDenominationKeyRevocationPS kr = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED),
.purpose.size = htonl (sizeof (kr)),
.h_denom_pub = *h_denom_pub
};
return GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED,
&kr,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_signkey_revoke_sign (
const struct TALER_ExchangePublicKeyP *exchange_pub,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterSigningKeyRevocationPS kv = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_SIGNING_KEY_REVOKED),
.purpose.size = htonl (sizeof (kv)),
.exchange_pub = *exchange_pub
};
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&kv,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_signkey_revoke_verify (
const struct TALER_ExchangePublicKeyP *exchange_pub,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterSigningKeyRevocationPS rm = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_SIGNING_KEY_REVOKED),
.purpose.size = htonl (sizeof (rm)),
.exchange_pub = *exchange_pub
};
return GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_MASTER_SIGNING_KEY_REVOKED,
&rm,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_signkey_validity_sign (
const struct TALER_ExchangePublicKeyP *exchange_pub,
struct GNUNET_TIME_Timestamp start_sign,
struct GNUNET_TIME_Timestamp end_sign,
struct GNUNET_TIME_Timestamp end_legal,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_ExchangeSigningKeyValidityPS skv = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_SIGNING_KEY_VALIDITY),
.purpose.size = htonl (sizeof (skv)),
.start = GNUNET_TIME_timestamp_hton (start_sign),
.expire = GNUNET_TIME_timestamp_hton (end_sign),
.end = GNUNET_TIME_timestamp_hton (end_legal),
.signkey_pub = *exchange_pub
};
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&skv,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_signkey_validity_verify (
const struct TALER_ExchangePublicKeyP *exchange_pub,
struct GNUNET_TIME_Timestamp start_sign,
struct GNUNET_TIME_Timestamp end_sign,
struct GNUNET_TIME_Timestamp end_legal,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_ExchangeSigningKeyValidityPS skv = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_SIGNING_KEY_VALIDITY),
.purpose.size = htonl (sizeof (skv)),
.start = GNUNET_TIME_timestamp_hton (start_sign),
.expire = GNUNET_TIME_timestamp_hton (end_sign),
.end = GNUNET_TIME_timestamp_hton (end_legal),
.signkey_pub = *exchange_pub
};
return
GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_MASTER_SIGNING_KEY_VALIDITY,
&skv,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_denom_validity_sign (
const struct TALER_DenominationHash *h_denom_pub,
struct GNUNET_TIME_Timestamp stamp_start,
struct GNUNET_TIME_Timestamp stamp_expire_withdraw,
struct GNUNET_TIME_Timestamp stamp_expire_deposit,
struct GNUNET_TIME_Timestamp 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_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_DenominationKeyValidityPS issue = {
.purpose.purpose
= htonl (TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY),
.purpose.size
= htonl (sizeof (issue)),
.start = GNUNET_TIME_timestamp_hton (stamp_start),
.expire_withdraw = GNUNET_TIME_timestamp_hton (stamp_expire_withdraw),
.expire_deposit = GNUNET_TIME_timestamp_hton (stamp_expire_deposit),
.expire_legal = GNUNET_TIME_timestamp_hton (stamp_expire_legal),
.denom_hash = *h_denom_pub
};
GNUNET_CRYPTO_eddsa_key_get_public (&master_priv->eddsa_priv,
&issue.master.eddsa_pub);
TALER_amount_hton (&issue.value,
coin_value);
TALER_amount_hton (&issue.fee_withdraw,
fee_withdraw);
TALER_amount_hton (&issue.fee_deposit,
fee_deposit);
TALER_amount_hton (&issue.fee_refresh,
fee_refresh);
TALER_amount_hton (&issue.fee_refund,
fee_refund);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&issue,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_denom_validity_verify (
const struct TALER_DenominationHash *h_denom_pub,
struct GNUNET_TIME_Timestamp stamp_start,
struct GNUNET_TIME_Timestamp stamp_expire_withdraw,
struct GNUNET_TIME_Timestamp stamp_expire_deposit,
struct GNUNET_TIME_Timestamp 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_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_DenominationKeyValidityPS dkv = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY),
.purpose.size = htonl (sizeof (dkv)),
.master = *master_pub,
.start = GNUNET_TIME_timestamp_hton (stamp_start),
.expire_withdraw = GNUNET_TIME_timestamp_hton (stamp_expire_withdraw),
.expire_deposit = GNUNET_TIME_timestamp_hton (stamp_expire_deposit),
.expire_legal = GNUNET_TIME_timestamp_hton (stamp_expire_legal),
.denom_hash = *h_denom_pub
};
TALER_amount_hton (&dkv.value,
coin_value);
TALER_amount_hton (&dkv.fee_withdraw,
fee_withdraw);
TALER_amount_hton (&dkv.fee_deposit,
fee_deposit);
TALER_amount_hton (&dkv.fee_refresh,
fee_refresh);
TALER_amount_hton (&dkv.fee_refund,
fee_refund);
return
GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY,
&dkv,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_wire_add_sign (
const char *payto_uri,
struct GNUNET_TIME_Timestamp now,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterAddWirePS kv = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_ADD_WIRE),
.purpose.size = htonl (sizeof (kv)),
.start_date = GNUNET_TIME_timestamp_hton (now),
};
TALER_payto_hash (payto_uri,
&kv.h_payto);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&kv,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_wire_add_verify (
const char *payto_uri,
struct GNUNET_TIME_Timestamp sign_time,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterAddWirePS aw = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_ADD_WIRE),
.purpose.size = htonl (sizeof (aw)),
.start_date = GNUNET_TIME_timestamp_hton (sign_time),
};
TALER_payto_hash (payto_uri,
&aw.h_payto);
return
GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_MASTER_ADD_WIRE,
&aw,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_wire_del_sign (
const char *payto_uri,
struct GNUNET_TIME_Timestamp now,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterDelWirePS kv = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_DEL_WIRE),
.purpose.size = htonl (sizeof (kv)),
.end_date = GNUNET_TIME_timestamp_hton (now),
};
TALER_payto_hash (payto_uri,
&kv.h_payto);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&kv,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_wire_del_verify (
const char *payto_uri,
struct GNUNET_TIME_Timestamp sign_time,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterDelWirePS aw = {
.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_DEL_WIRE),
.purpose.size = htonl (sizeof (aw)),
.end_date = GNUNET_TIME_timestamp_hton (sign_time),
};
TALER_payto_hash (payto_uri,
&aw.h_payto);
return GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_MASTER_DEL_WIRE,
&aw,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_wire_fee_sign (
const char *payment_method,
struct GNUNET_TIME_Timestamp start_time,
struct GNUNET_TIME_Timestamp end_time,
const struct TALER_Amount *wire_fee,
const struct TALER_Amount *closing_fee,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterWireFeePS kv = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_FEES),
.purpose.size = htonl (sizeof (kv)),
.start_date = GNUNET_TIME_timestamp_hton (start_time),
.end_date = GNUNET_TIME_timestamp_hton (end_time),
};
GNUNET_CRYPTO_hash (payment_method,
strlen (payment_method) + 1,
&kv.h_wire_method);
TALER_amount_hton (&kv.wire_fee,
wire_fee);
TALER_amount_hton (&kv.closing_fee,
closing_fee);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&kv,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_wire_fee_verify (
const char *payment_method,
struct GNUNET_TIME_Timestamp start_time,
struct GNUNET_TIME_Timestamp end_time,
const struct TALER_Amount *wire_fee,
const struct TALER_Amount *closing_fee,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterWireFeePS wf = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_FEES),
.purpose.size = htonl (sizeof (wf)),
.start_date = GNUNET_TIME_timestamp_hton (start_time),
.end_date = GNUNET_TIME_timestamp_hton (end_time)
};
GNUNET_CRYPTO_hash (payment_method,
strlen (payment_method) + 1,
&wf.h_wire_method);
TALER_amount_hton (&wf.wire_fee,
wire_fee);
TALER_amount_hton (&wf.closing_fee,
closing_fee);
return
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_WIRE_FEES,
&wf,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
void
TALER_exchange_offline_extension_agemask_sign (
const struct TALER_AgeMask mask,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterExtensionAgeRestrictionPS ar = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_EXTENSION),
.purpose.size = htonl (sizeof(ar)),
.mask = mask
};
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&ar,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_extension_agemask_verify (
const struct TALER_AgeMask mask,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig
)
{
struct TALER_MasterExtensionAgeRestrictionPS ar = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_EXTENSION),
.purpose.size = htonl (sizeof(ar)),
.mask = mask
};
return
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_EXTENSION,
&ar,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
#if 0
/* TODO peer2peer */
void
TALER_exchange_offline_extension_p2p_sign (
// TODO
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
// TODO
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_extension_p2p_verify (
// TODO
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig,
)
{
// TODO
return GNUNET_FALSE;
}
#endif
/* end of offline_signatures.c */
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