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|
/*
This file is part of TALER
Copyright (C) 2020-2022 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"
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Signature made by the exchange offline key over the information of
* an AML officer status change.
*/
struct TALER_MasterAmlOfficerStatusPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_AML_KEY. Signed
* by a `struct TALER_MasterPublicKeyP` using EdDSA.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Time of the change.
*/
struct GNUNET_TIME_TimestampNBO change_date;
/**
* Public key of the AML officer.
*/
struct TALER_AmlOfficerPublicKeyP officer_pub;
/**
* Hash over the AML officer's name.
*/
struct GNUNET_HashCode h_officer_name GNUNET_PACKED;
/**
* Bitmask: 1 if enabled; 2 for read-only access. in NBO.
*/
uint32_t is_active GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_exchange_offline_aml_officer_status_sign (
const struct TALER_AmlOfficerPublicKeyP *officer_pub,
const char *officer_name,
struct GNUNET_TIME_Timestamp change_date,
bool is_active,
bool read_only,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterAmlOfficerStatusPS as = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_AML_KEY),
.purpose.size = htonl (sizeof (as)),
.change_date = GNUNET_TIME_timestamp_hton (change_date),
.officer_pub = *officer_pub,
.is_active = htonl ((is_active ? 1 : 0) + (read_only ? 2 : 0))
};
GNUNET_CRYPTO_hash (officer_name,
strlen (officer_name) + 1,
&as.h_officer_name);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&as,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_aml_officer_status_verify (
const struct TALER_AmlOfficerPublicKeyP *officer_pub,
const char *officer_name,
struct GNUNET_TIME_Timestamp change_date,
bool is_active,
bool read_only,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterAmlOfficerStatusPS as = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_AML_KEY),
.purpose.size = htonl (sizeof (as)),
.change_date = GNUNET_TIME_timestamp_hton (change_date),
.officer_pub = *officer_pub,
.is_active = htonl ((is_active ? 1 : 0) + (read_only ? 2 : 0))
};
GNUNET_CRYPTO_hash (officer_name,
strlen (officer_name) + 1,
&as.h_officer_name);
return GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_AML_KEY,
&as,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Signature made by the exchange offline key over the information of
* an auditor to be added to the exchange's set of auditors.
*/
struct TALER_MasterAddAuditorPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_ADD_AUDITOR. Signed
* by a `struct TALER_MasterPublicKeyP` using EdDSA.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Time of the change.
*/
struct GNUNET_TIME_TimestampNBO start_date;
/**
* Public key of the auditor.
*/
struct TALER_AuditorPublicKeyP auditor_pub;
/**
* Hash over the auditor's URL.
*/
struct GNUNET_HashCode h_auditor_url GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
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);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Signature made by the exchange offline key over the information of
* an auditor to be removed from the exchange's set of auditors.
*/
struct TALER_MasterDelAuditorPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_DEL_AUDITOR. Signed
* by a `struct TALER_MasterPublicKeyP` using EdDSA.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Time of the change.
*/
struct GNUNET_TIME_TimestampNBO end_date;
/**
* Public key of the auditor.
*/
struct TALER_AuditorPublicKeyP auditor_pub;
};
GNUNET_NETWORK_STRUCT_END
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);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Message confirming that a denomination key was revoked.
*/
struct TALER_MasterDenominationKeyRevocationPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Hash of the denomination key.
*/
struct TALER_DenominationHashP h_denom_pub;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_exchange_offline_denomination_revoke_sign (
const struct TALER_DenominationHashP *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_DenominationHashP *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);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Message confirming that an exchange online signing key was revoked.
*/
struct TALER_MasterSigningKeyRevocationPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_SIGNING_KEY_REVOKED.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* The exchange's public key.
*/
struct TALER_ExchangePublicKeyP exchange_pub;
};
GNUNET_NETWORK_STRUCT_END
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);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Information about a signing key of the exchange. Signing keys are used
* to sign exchange messages other than coins, i.e. to confirm that a
* deposit was successful or that a refresh was accepted.
*/
struct TALER_ExchangeSigningKeyValidityPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_SIGNING_KEY_VALIDITY.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* When does this signing key begin to be valid?
*/
struct GNUNET_TIME_TimestampNBO start;
/**
* When does this signing key expire? Note: This is currently when
* the Exchange will definitively stop using it. Signatures made with
* the key remain valid until @e end. When checking validity periods,
* clients should allow for some overlap between keys and tolerate
* the use of either key during the overlap time (due to the
* possibility of clock skew).
*/
struct GNUNET_TIME_TimestampNBO expire;
/**
* When do signatures with this signing key become invalid? After
* this point, these signatures cannot be used in (legal) disputes
* anymore, as the Exchange is then allowed to destroy its side of the
* evidence. @e end is expected to be significantly larger than @e
* expire (by a year or more).
*/
struct GNUNET_TIME_TimestampNBO end;
/**
* The public online signing key that the exchange will use
* between @e start and @e expire.
*/
struct TALER_ExchangePublicKeyP signkey_pub;
};
GNUNET_NETWORK_STRUCT_END
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);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Information about a denomination key. Denomination keys
* are used to sign coins of a certain value into existence.
*/
struct TALER_DenominationKeyValidityPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* The long-term offline master key of the exchange that was
* used to create @e signature.
*
* Note: This member is not strictly required, but here for
* backwards-compatibility. If we ever again badly break
* compatibility, we might want to remove it.
*/
struct TALER_MasterPublicKeyP master;
/**
* Start time of the validity period for this key.
*/
struct GNUNET_TIME_TimestampNBO start;
/**
* The exchange will sign fresh coins between @e start and this time.
* @e expire_withdraw will be somewhat larger than @e start to
* ensure a sufficiently large anonymity set, while also allowing
* the Exchange to limit the financial damage in case of a key being
* compromised. Thus, exchanges with low volume are expected to have a
* longer withdraw period (@e expire_withdraw - @e start) than exchanges
* with high transaction volume. The period may also differ between
* types of coins. A exchange may also have a few denomination keys
* with the same value with overlapping validity periods, to address
* issues such as clock skew.
*/
struct GNUNET_TIME_TimestampNBO expire_withdraw;
/**
* Coins signed with the denomination key must be spent or refreshed
* between @e start and this expiration time. After this time, the
* exchange will refuse transactions involving this key as it will
* "drop" the table with double-spending information (shortly after)
* this time. Note that wallets should refresh coins significantly
* before this time to be on the safe side. @e expire_deposit must be
* significantly larger than @e expire_withdraw (by months or even
* years).
*/
struct GNUNET_TIME_TimestampNBO expire_deposit;
/**
* When do signatures with this denomination key become invalid?
* After this point, these signatures cannot be used in (legal)
* disputes anymore, as the Exchange is then allowed to destroy its side
* of the evidence. @e expire_legal is expected to be significantly
* larger than @e expire_deposit (by a year or more).
*/
struct GNUNET_TIME_TimestampNBO expire_legal;
/**
* The value of the coins signed with this denomination key.
*/
struct TALER_AmountNBO value;
/**
* Fees for the coin.
*/
struct TALER_DenomFeeSetNBOP fees;
/**
* Hash code of the denomination public key. (Used to avoid having
* the variable-size RSA key in this struct.)
*/
struct TALER_DenominationHashP denom_hash GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_exchange_offline_denom_validity_sign (
const struct TALER_DenominationHashP *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_DenomFeeSet *fees,
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_denom_fee_set_hton (&issue.fees,
fees);
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_DenominationHashP *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_DenomFeeSet *fees,
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_denom_fee_set_hton (&dkv.fees,
fees);
return
GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY,
&dkv,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Signature made by the exchange offline key over the information of
* a payto:// URI to be added to the exchange's set of active wire accounts.
*/
struct TALER_MasterAddWirePS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_ADD_WIRE. Signed
* by a `struct TALER_MasterPublicKeyP` using EdDSA.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Time of the change.
*/
struct GNUNET_TIME_TimestampNBO start_date;
/**
* Hash over the exchange's payto URI.
*/
struct TALER_PaytoHashP h_payto GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
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);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Signature made by the exchange offline key over the information of
* a wire method to be removed to the exchange's set of active accounts.
*/
struct TALER_MasterDelWirePS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_DEL_WIRE. Signed
* by a `struct TALER_MasterPublicKeyP` using EdDSA.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Time of the change.
*/
struct GNUNET_TIME_TimestampNBO end_date;
/**
* Hash over the exchange's payto URI.
*/
struct TALER_PaytoHashP h_payto GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
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);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Information signed by the exchange's master
* key stating the wire fee to be paid per wire transfer.
*/
struct TALER_MasterWireFeePS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_WIRE_FEES.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Hash over the wire method (yes, H("x-taler-bank") or H("iban")), in lower
* case, including 0-terminator. Used to uniquely identify which
* wire method these fees apply to.
*/
struct GNUNET_HashCode h_wire_method;
/**
* Start date when the fee goes into effect.
*/
struct GNUNET_TIME_TimestampNBO start_date;
/**
* End date when the fee stops being in effect (exclusive)
*/
struct GNUNET_TIME_TimestampNBO end_date;
/**
* Fees charged for wire transfers using the
* given wire method.
*/
struct TALER_WireFeeSetNBOP fees;
};
GNUNET_NETWORK_STRUCT_END
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_WireFeeSet *fees,
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_wire_fee_set_hton (&kv.fees,
fees);
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_WireFeeSet *fees,
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_wire_fee_set_hton (&wf.fees,
fees);
return
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_WIRE_FEES,
&wf,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Global fees charged by the exchange independent of
* denomination or wire method.
*/
struct TALER_MasterGlobalFeePS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_GLOBAL_FEES.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Start date when the fee goes into effect.
*/
struct GNUNET_TIME_TimestampNBO start_date;
/**
* End date when the fee stops being in effect (exclusive)
*/
struct GNUNET_TIME_TimestampNBO end_date;
/**
* How long does an exchange keep a purse around after a purse
* has expired (or been successfully merged)? A 'GET' request
* for a purse will succeed until the purse expiration time
* plus this value.
*/
struct GNUNET_TIME_RelativeNBO purse_timeout;
/**
* How long will the exchange preserve the account history? After an
* account was deleted/closed, the exchange will retain the account history
* for legal reasons until this time.
*/
struct GNUNET_TIME_RelativeNBO history_expiration;
/**
* Fee charged to the merchant per wire transfer.
*/
struct TALER_GlobalFeeSetNBOP fees;
/**
* Number of concurrent purses that any
* account holder is allowed to create without having
* to pay the @e purse_fee. Here given in NBO.
*/
uint32_t purse_account_limit;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_exchange_offline_global_fee_sign (
struct GNUNET_TIME_Timestamp start_time,
struct GNUNET_TIME_Timestamp end_time,
const struct TALER_GlobalFeeSet *fees,
struct GNUNET_TIME_Relative purse_timeout,
struct GNUNET_TIME_Relative history_expiration,
uint32_t purse_account_limit,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterGlobalFeePS kv = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_GLOBAL_FEES),
.purpose.size = htonl (sizeof (kv)),
.start_date = GNUNET_TIME_timestamp_hton (start_time),
.end_date = GNUNET_TIME_timestamp_hton (end_time),
.purse_timeout = GNUNET_TIME_relative_hton (purse_timeout),
.history_expiration = GNUNET_TIME_relative_hton (history_expiration),
.purse_account_limit = htonl (purse_account_limit)
};
TALER_global_fee_set_hton (&kv.fees,
fees);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&kv,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_global_fee_verify (
struct GNUNET_TIME_Timestamp start_time,
struct GNUNET_TIME_Timestamp end_time,
const struct TALER_GlobalFeeSet *fees,
struct GNUNET_TIME_Relative purse_timeout,
struct GNUNET_TIME_Relative history_expiration,
uint32_t purse_account_limit,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterGlobalFeePS wf = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_GLOBAL_FEES),
.purpose.size = htonl (sizeof (wf)),
.start_date = GNUNET_TIME_timestamp_hton (start_time),
.end_date = GNUNET_TIME_timestamp_hton (end_time),
.purse_timeout = GNUNET_TIME_relative_hton (purse_timeout),
.history_expiration = GNUNET_TIME_relative_hton (history_expiration),
.purse_account_limit = htonl (purse_account_limit)
};
TALER_global_fee_set_hton (&wf.fees,
fees);
return
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_GLOBAL_FEES,
&wf,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Signature made by the exchange offline key over the manifest of
* an extension.
*/
struct TALER_MasterExtensionManifestPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_EXTENSION. Signed
* by a `struct TALER_MasterPublicKeyP` using EdDSA.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Hash of the JSON object that represents the manifests of extensions.
*/
struct TALER_ExtensionManifestsHashP h_manifest GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_exchange_offline_extension_manifests_hash_sign (
const struct TALER_ExtensionManifestsHashP *h_manifest,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_MasterExtensionManifestPS ec = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_EXTENSION),
.purpose.size = htonl (sizeof(ec)),
.h_manifest = *h_manifest
};
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&ec,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_extension_manifests_hash_verify (
const struct TALER_ExtensionManifestsHashP *h_manifest,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig
)
{
struct TALER_MasterExtensionManifestPS ec = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_EXTENSION),
.purpose.size = htonl (sizeof(ec)),
.h_manifest = *h_manifest
};
return GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_EXTENSION,
&ec,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Information signed by the exchange's master
* key affirming the IBAN details for the exchange.
*/
struct TALER_MasterWireDetailsPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_WIRE_DETAILS.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Hash over the account holder's payto:// URL.
*/
struct TALER_PaytoHashP h_wire_details GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
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);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Message signed by account to merge a purse into a reserve.
*/
struct TALER_PartnerConfigurationPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_PARNTER_DETAILS
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
struct TALER_MasterPublicKeyP partner_pub;
struct GNUNET_TIME_TimestampNBO start_date;
struct GNUNET_TIME_TimestampNBO end_date;
struct GNUNET_TIME_RelativeNBO wad_frequency;
struct TALER_AmountNBO wad_fee;
struct GNUNET_HashCode h_url;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_exchange_offline_partner_details_sign (
const struct TALER_MasterPublicKeyP *partner_pub,
struct GNUNET_TIME_Timestamp start_date,
struct GNUNET_TIME_Timestamp end_date,
struct GNUNET_TIME_Relative wad_frequency,
const struct TALER_Amount *wad_fee,
const char *partner_base_url,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_PartnerConfigurationPS wd = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_PARTNER_DETAILS),
.purpose.size = htonl (sizeof (wd)),
.partner_pub = *partner_pub,
.start_date = GNUNET_TIME_timestamp_hton (start_date),
.end_date = GNUNET_TIME_timestamp_hton (end_date),
.wad_frequency = GNUNET_TIME_relative_hton (wad_frequency),
};
GNUNET_CRYPTO_hash (partner_base_url,
strlen (partner_base_url) + 1,
&wd.h_url);
TALER_amount_hton (&wd.wad_fee,
wad_fee);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&wd,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_partner_details_verify (
const struct TALER_MasterPublicKeyP *partner_pub,
struct GNUNET_TIME_Timestamp start_date,
struct GNUNET_TIME_Timestamp end_date,
struct GNUNET_TIME_Relative wad_frequency,
const struct TALER_Amount *wad_fee,
const char *partner_base_url,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_PartnerConfigurationPS wd = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_PARTNER_DETAILS),
.purpose.size = htonl (sizeof (wd)),
.partner_pub = *partner_pub,
.start_date = GNUNET_TIME_timestamp_hton (start_date),
.end_date = GNUNET_TIME_timestamp_hton (end_date),
.wad_frequency = GNUNET_TIME_relative_hton (wad_frequency),
};
GNUNET_CRYPTO_hash (partner_base_url,
strlen (partner_base_url) + 1,
&wd.h_url);
TALER_amount_hton (&wd.wad_fee,
wad_fee);
return GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_PARTNER_DETAILS,
&wd,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Message signed by account to drain profits
* from the escrow account of the exchange.
*/
struct TALER_DrainProfitPS
{
/**
* Purpose is #TALER_SIGNATURE_MASTER_DRAIN_PROFITS
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
struct TALER_WireTransferIdentifierRawP wtid;
struct GNUNET_TIME_TimestampNBO date;
struct TALER_AmountNBO amount;
struct GNUNET_HashCode h_section;
struct TALER_PaytoHashP h_payto;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_exchange_offline_profit_drain_sign (
const struct TALER_WireTransferIdentifierRawP *wtid,
struct GNUNET_TIME_Timestamp date,
const struct TALER_Amount *amount,
const char *account_section,
const char *payto_uri,
const struct TALER_MasterPrivateKeyP *master_priv,
struct TALER_MasterSignatureP *master_sig)
{
struct TALER_DrainProfitPS wd = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_DRAIN_PROFIT),
.purpose.size = htonl (sizeof (wd)),
.wtid = *wtid,
.date = GNUNET_TIME_timestamp_hton (date),
};
GNUNET_CRYPTO_hash (account_section,
strlen (account_section) + 1,
&wd.h_section);
TALER_payto_hash (payto_uri,
&wd.h_payto);
TALER_amount_hton (&wd.amount,
amount);
GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
&wd,
&master_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_exchange_offline_profit_drain_verify (
const struct TALER_WireTransferIdentifierRawP *wtid,
struct GNUNET_TIME_Timestamp date,
const struct TALER_Amount *amount,
const char *account_section,
const char *payto_uri,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig)
{
struct TALER_DrainProfitPS wd = {
.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_DRAIN_PROFIT),
.purpose.size = htonl (sizeof (wd)),
.wtid = *wtid,
.date = GNUNET_TIME_timestamp_hton (date),
};
GNUNET_CRYPTO_hash (account_section,
strlen (account_section) + 1,
&wd.h_section);
TALER_payto_hash (payto_uri,
&wd.h_payto);
TALER_amount_hton (&wd.amount,
amount);
return GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_DRAIN_PROFIT,
&wd,
&master_sig->eddsa_signature,
&master_pub->eddsa_pub);
}
/* end of offline_signatures.c */
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