/*
This file is part of TALER
Copyright (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
*/
/**
* @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
#include "taler_util.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 using a coin key confirming the melting of
* a coin.
*/
#define TALER_SIGNATURE_REFRESH_MELT_COIN 5
/**
* Signature where the refresh session confirms
* the commits.
*/
#define TALER_SIGNATURE_REFRESH_MELT_SESSION 6
/**
* Signature where the mint (current signing key)
* confirms the no-reveal index for cut-and-choose and
* the validity of the melted coins.
*/
#define TALER_SIGNATURE_REFRESH_MELT_RESPONSE 7
/**
* Signature where coins confirm that they want
* to be melted into a certain session.
*/
#define TALER_SIGNATURE_REFRESH_MELT_CONFIRM 9
/**
* Signature where the Mint confirms a deposit request.
*/
#define TALER_SIGNATURE_MINT_DEPOSIT 10
/***********************/
/* 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_WALLET_DEPOSIT 201
/**
* Signature made by the wallet of a user to confirm a incremental deposit permission
*/
#define TALER_SIGNATURE_INCREMENTAL_WALLET_DEPOSIT 202
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Format used for to generate the signature on a request to withdraw
* coins from a reserve.
*/
struct TALER_WithdrawRequest
{
/**
* Purpose must be #TALER_SIGNATURE_WITHDRAW.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Reserve public key (which reserve to withdraw from). This is
* the public key which must match the signature.
*/
struct GNUNET_CRYPTO_EddsaPublicKey reserve_pub;
/**
* Hash of the denomination public key for the coin that is withdrawn.
*/
struct GNUNET_HashCode h_denomination_pub;
/**
* Hash of the (blinded) message to be signed by the Mint.
*/
struct GNUNET_HashCode h_coin_envelope;
};
/**
* Format used to generate the signature on a request to deposit
* a coin into the account of a merchant.
*/
struct TALER_DepositRequest
{
/**
* Purpose must be #TALER_SIGNATURE_WALLET_DEPOSIT
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Hash over the contract for which this deposit is made.
*/
struct GNUNET_HashCode h_contract;
/**
* Hash over the wiring information of the merchant.
*/
struct GNUNET_HashCode h_wire;
/**
* Merchant-generated transaction ID to detect duplicate
* transactions.
*/
uint64_t transaction_id GNUNET_PACKED;
/**
* Amount to be deposited.
*/
struct TALER_AmountNBO amount;
/**
* The coin's public key.
*/
struct GNUNET_CRYPTO_EcdsaPublicKey coin_pub;
};
/**
* Format used to generate the signature on a confirmation
* from the mint that a deposit request succeeded.
*/
struct TALER_DepositConfirmation
{
/**
* Purpose must be #TALER_SIGNATURE_MINT_DEPOSIT
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Hash over the contract for which this deposit is made.
*/
struct GNUNET_HashCode h_contract;
/**
* Hash over the wiring information of the merchant.
*/
struct GNUNET_HashCode h_wire;
/**
* Merchant-generated transaction ID to detect duplicate
* transactions.
*/
uint64_t transaction_id GNUNET_PACKED;
/**
* Amount to be deposited.
*/
struct TALER_AmountNBO amount;
/**
* The coin's public key.
*/
struct GNUNET_CRYPTO_EcdsaPublicKey coin_pub;
/**
* The Merchant's public key.
*/
struct GNUNET_CRYPTO_EddsaPublicKey merchant;
};
/**
* Message signed by a coin to indicate that the coin should
* be melted.
*/
struct RefreshMeltCoinSignature
{
/**
* Purpose is #TALER_SIGNATURE_REFRESH_MELT_COIN.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Which melting operation should the coin become a part of.
*/
struct GNUNET_HashCode melt_hash;
/**
* How much of the value of the coin should be melted?
* This amount includes the fees, so the final amount contributed
* to the melt is this value minus the fee for melting the coin.
*/
struct TALER_AmountNBO amount;
/**
* The coin's public key.
*/
struct GNUNET_CRYPTO_EcdsaPublicKey coin_pub;
};
/**
* Message signed by a coin to indicate that the coin should
* be melted.
*/
struct RefreshMeltSessionSignature
{
/**
* Purpose is #TALER_SIGNATURE_REFRESH_MELT_SESSION
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Which melting operation should the coin become a part of.
*/
struct GNUNET_HashCode melt_hash;
/**
* Public key of the refresh session for which
* @e melt_client_signature must be a valid signature.
*/
struct GNUNET_CRYPTO_EddsaPublicKey session_key;
/**
* What is the total value of the coins created during the
* refresh, excluding fees?
*/
struct TALER_AmountNBO amount;
};
/**
* Format of the block signed by the Mint in response to a successful
* "/refresh/melt" request. Hereby the mint affirms that all of the
* coins were successfully melted. This also commits the mint to a
* particular index to not be revealed during the refresh.
*/
struct RefreshMeltResponseSignatureBody
{
/**
* Purpose is #TALER_SIGNATURE_REFRESH_MELT_RESPONSE.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Hash of the refresh session.
*/
struct GNUNET_HashCode session_hash;
/**
* Index that the client will not have to reveal.
*/
uint16_t noreveal_index GNUNET_PACKED;
};
/**
* Message signed by the client requesting the final
* result of the melting operation.
*/
struct RefreshMeltConfirmSignRequestBody
{
/**
* Purpose is #TALER_SIGNATURE_REFRESH_MELT_CONFIRM.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* FIXME.
*/
struct GNUNET_CRYPTO_EddsaPublicKey session_pub;
};
/**
* 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_AmountNBO value;
struct TALER_AmountNBO fee_withdraw;
struct TALER_AmountNBO fee_deposit;
struct TALER_AmountNBO fee_refresh;
// FIXME: does not work like this:
struct GNUNET_CRYPTO_rsa_PublicKey *denom_pub;
};
GNUNET_NETWORK_STRUCT_END
#endif