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/*
This file is part of TALER
(C) 2014 Christian Grothoff (and other contributing authors)
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, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file taler_signatures.h
* @brief message formats and signature constants used to define
* the binary formats of signatures in Taler
* @author Florian Dold
* @author Benedikt Mueller
*
* This file should define the constants and C structs that one
* needs to know to implement Taler clients (wallets or merchants)
* that need to produce or verify Taler signatures.
*/
#ifndef TALER_SIGNATURES_H
#define TALER_SIGNATURES_H
#include <gnunet/gnunet_util_lib.h>
#include "taler_rsa.h"
/**
* Purpose for signing public keys signed
* by the mint master key.
*/
#define TALER_SIGNATURE_MASTER_SIGNKEY 1
/**
* Purpose for denomination keys signed
* by the mint master key.
*/
#define TALER_SIGNATURE_MASTER_DENOM 2
/**
* Purpose for the state of a reserve,
* signed by the mint's signing key.
*/
#define TALER_SIGNATURE_RESERVE_STATUS 3
/**
* Signature where the reserve key
* confirms a withdraw request.
*/
#define TALER_SIGNATURE_WITHDRAW 4
/**
* Signature where the refresh session confirms
* the list of melted coins and requested denominations.
*/
#define TALER_SIGNATURE_REFRESH_MELT 5
/**
* Signature where the refresh session confirms
* the commits.
*/
#define TALER_SIGNATURE_REFRESH_COMMIT 6
/**
* Signature where the mint (current signing key)
* confirms the list of blind session keys.
*/
#define TALER_SIGNATURE_REFRESH_MELT_RESPONSE 7
/**
* Signature where the mint (current signing key)
* confirms the no-reveal index for cut-and-choose.
*/
#define TALER_SIGNATURE_REFRESH_COMMIT_RESPONSE 8
/**
* Signature where coins confirm that they want
* to be melted into a certain session.
*/
#define TALER_SIGNATURE_REFRESH_MELT_CONFIRM 9
/***********************/
/* Merchant signatures */
/***********************/
/**
* Signature where the merchant confirms a contract
*/
#define TALER_SIGNATURE_MERCHANT_CONTRACT 101
/*********************/
/* Wallet signatures */
/*********************/
/**
* Signature made by the wallet of a user to confirm a deposit permission
*/
#define TALER_SIGNATURE_DEPOSIT 201
/**
* Signature made by the wallet of a user to confirm a incremental deposit permission
*/
#define TALER_SIGNATURE_INCREMENTAL_DEPOSIT 202
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Request to withdraw coins from a reserve.
*/
struct TALER_WithdrawRequest
{
/**
* Signature over the rest of the message
* by the withdraw public key.
*/
struct GNUNET_CRYPTO_EddsaSignature sig;
/**
* Purpose must be #TALER_SIGNATURE_WITHDRAW.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Reserve public key.
*/
struct GNUNET_CRYPTO_EddsaPublicKey reserve_pub;
/**
* Denomination public key for the coin that is withdrawn.
* FIXME: change to the hash of the public key (so this
* is fixed-size).
*/
struct TALER_RSA_PublicKeyBinaryEncoded denomination_pub;
/**
* Purpose containing coin's blinded public key.
*
* FIXME: this should be explicitly a variable-size field with the
* (blinded) message to be signed by the Mint.
*/
struct TALER_RSA_BlindedSignaturePurpose coin_envelope;
};
/**
* FIXME
*/
struct TALER_MINT_SignKeyIssue
{
struct GNUNET_CRYPTO_EddsaSignature signature;
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
struct GNUNET_CRYPTO_EddsaPublicKey master_pub;
struct GNUNET_TIME_AbsoluteNBO start;
struct GNUNET_TIME_AbsoluteNBO expire;
struct GNUNET_CRYPTO_EddsaPublicKey signkey_pub;
};
/**
* FIXME
*/
struct TALER_MINT_DenomKeyIssue
{
struct GNUNET_CRYPTO_EddsaSignature signature;
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
struct GNUNET_CRYPTO_EddsaPublicKey master;
struct GNUNET_TIME_AbsoluteNBO start;
struct GNUNET_TIME_AbsoluteNBO expire_withdraw;
struct GNUNET_TIME_AbsoluteNBO expire_spend;
struct TALER_RSA_PublicKeyBinaryEncoded denom_pub;
struct TALER_AmountNBO value;
struct TALER_AmountNBO fee_withdraw;
struct TALER_AmountNBO fee_deposit;
struct TALER_AmountNBO fee_refresh;
};
/**
* FIXME
*/
struct RefreshMeltSignatureBody
{
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
struct GNUNET_HashCode melt_hash;
};
/**
* FIXME
*/
struct RefreshCommitSignatureBody
{
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
struct GNUNET_HashCode commit_hash;
};
/**
* FIXME
*/
struct RefreshCommitResponseSignatureBody
{
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
uint16_t noreveal_index;
};
/**
* FIXME
*/
struct RefreshMeltResponseSignatureBody
{
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
struct GNUNET_HashCode melt_response_hash;
};
/**
* FIXME
*/
struct RefreshMeltConfirmSignRequestBody
{
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
struct GNUNET_CRYPTO_EddsaPublicKey session_pub;
};
GNUNET_NETWORK_STRUCT_END
#endif
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