/* This file is part of TALER Copyright (C) 2014-2021 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 */ /** * @file include/taler_crypto_lib.h * @brief taler-specific crypto functions * @author Sree Harsha Totakura * @author Christian Grothoff */ #ifndef TALER_CRYPTO_LIB_H #define TALER_CRYPTO_LIB_H #include #include "taler_error_codes.h" #include /* ****************** Coin crypto primitives ************* */ GNUNET_NETWORK_STRUCT_BEGIN /** * @brief Type of public keys for Taler security modules (software or hardware). * Note that there are usually at least two security modules (RSA and EdDSA), * each with its own private key. */ struct TALER_SecurityModulePublicKeyP { /** * Taler uses EdDSA for security modules. */ struct GNUNET_CRYPTO_EddsaPublicKey eddsa_pub; }; /** * @brief Set of the public keys of the security modules */ struct TALER_SecurityModulePublicKeySetP { /** * Public key of the RSA security module */ struct TALER_SecurityModulePublicKeyP rsa; /** * Public key of the CS security module */ struct TALER_SecurityModulePublicKeyP cs; /** * Public key of the eddsa security module */ struct TALER_SecurityModulePublicKeyP eddsa; }; /** * @brief Type of private keys for Taler security modules (software or hardware). */ struct TALER_SecurityModulePrivateKeyP { /** * Taler uses EdDSA for security modules. */ struct GNUNET_CRYPTO_EddsaPrivateKey eddsa_priv; }; /** * @brief Type of signatures used for Taler security modules (software or hardware). */ struct TALER_SecurityModuleSignatureP { /** * Taler uses EdDSA for security modules. */ struct GNUNET_CRYPTO_EddsaSignature eddsa_signature; }; /** * @brief Type of public keys for Taler reserves. */ struct TALER_ReservePublicKeyP { /** * Taler uses EdDSA for reserves. */ struct GNUNET_CRYPTO_EddsaPublicKey eddsa_pub; }; /** * @brief Type of private keys for Taler reserves. */ struct TALER_ReservePrivateKeyP { /** * Taler uses EdDSA for reserves. */ struct GNUNET_CRYPTO_EddsaPrivateKey eddsa_priv; }; /** * @brief Type of signatures used with Taler reserves. */ struct TALER_ReserveSignatureP { /** * Taler uses EdDSA for reserves. */ struct GNUNET_CRYPTO_EddsaSignature eddsa_signature; }; /** * @brief Type of public keys to for merchant authorizations. * Merchants can issue refunds using the corresponding * private key. */ struct TALER_MerchantPublicKeyP { /** * Taler uses EdDSA for merchants. */ struct GNUNET_CRYPTO_EddsaPublicKey eddsa_pub; }; /** * @brief Type of private keys for merchant authorizations. * Merchants can issue refunds using the corresponding * private key. */ struct TALER_MerchantPrivateKeyP { /** * Taler uses EdDSA for merchants. */ struct GNUNET_CRYPTO_EddsaPrivateKey eddsa_priv; }; /** * @brief Type of signatures made by merchants. */ struct TALER_MerchantSignatureP { /** * Taler uses EdDSA for merchants. */ struct GNUNET_CRYPTO_EddsaSignature eddsa_sig; }; /** * @brief Type of transfer public keys used during refresh * operations. */ struct TALER_TransferPublicKeyP { /** * Taler uses ECDHE for transfer keys. */ struct GNUNET_CRYPTO_EcdhePublicKey ecdhe_pub; }; /** * @brief Type of transfer public keys used during refresh * operations. */ struct TALER_TransferPrivateKeyP { /** * Taler uses ECDHE for melting session keys. */ struct GNUNET_CRYPTO_EcdhePrivateKey ecdhe_priv; }; /** * @brief Type of online public keys used by the exchange to sign * messages. */ struct TALER_ExchangePublicKeyP { /** * Taler uses EdDSA for online exchange message signing. */ struct GNUNET_CRYPTO_EddsaPublicKey eddsa_pub; }; /** * @brief Type of online public keys used by the exchange to * sign messages. */ struct TALER_ExchangePrivateKeyP { /** * Taler uses EdDSA for online signatures sessions. */ struct GNUNET_CRYPTO_EddsaPrivateKey eddsa_priv; }; /** * @brief Type of signatures used by the exchange to sign messages online. */ struct TALER_ExchangeSignatureP { /** * Taler uses EdDSA for online signatures sessions. */ struct GNUNET_CRYPTO_EddsaSignature eddsa_signature; }; /** * @brief Type of the offline master public key used by the exchange. */ struct TALER_MasterPublicKeyP { /** * Taler uses EdDSA for the long-term offline master key. */ struct GNUNET_CRYPTO_EddsaPublicKey eddsa_pub; }; /** * @brief Type of the private key used by the auditor. */ struct TALER_AuditorPrivateKeyP { /** * Taler uses EdDSA for the auditor's signing key. */ struct GNUNET_CRYPTO_EddsaPrivateKey eddsa_priv; }; /** * @brief Type of the public key used by the auditor. */ struct TALER_AuditorPublicKeyP { /** * Taler uses EdDSA for the auditor's signing key. */ struct GNUNET_CRYPTO_EddsaPublicKey eddsa_pub; }; /** * @brief Type of signatures used by the auditor. */ struct TALER_AuditorSignatureP { /** * Taler uses EdDSA signatures for auditors. */ struct GNUNET_CRYPTO_EddsaSignature eddsa_sig; }; /** * @brief Type of the offline master public keys used by the exchange. */ struct TALER_MasterPrivateKeyP { /** * Taler uses EdDSA for the long-term offline master key. */ struct GNUNET_CRYPTO_EddsaPrivateKey eddsa_priv; }; /** * @brief Type of signatures by the offline master public key used by the exchange. */ struct TALER_MasterSignatureP { /** * Taler uses EdDSA for the long-term offline master key. */ struct GNUNET_CRYPTO_EddsaSignature eddsa_signature; }; /* * @brief Type of a list of age groups, represented as bit mask. * * The bits set in the mask mark the edges at the beginning of a next age * group. F.e. for the age groups * 0-7, 8-9, 10-11, 12-14, 14-15, 16-17, 18-21, 21-* * the following bits are set: * * 31 24 16 8 0 * | | | | | * oooooooo oo1oo1o1 o1o1o1o1 ooooooo1 * * A value of 0 means that the exchange does not support the extension for * age-restriction. */ struct TALER_AgeMask { uint32_t mask; }; /** * @brief Age restriction commitment of a coin. */ struct TALER_AgeHash { /** * The commitment is a SHA-256 hash code. */ struct GNUNET_ShortHashCode shash; }; /** * @brief Type of public keys for Taler coins. The same key material is used * for EdDSA and ECDHE operations. */ struct TALER_CoinSpendPublicKeyP { /** * Taler uses EdDSA for coins when signing deposit requests. */ struct GNUNET_CRYPTO_EddsaPublicKey eddsa_pub; }; /** * @brief Type of private keys for Taler coins. The same key material is used * for EdDSA and ECDHE operations. */ struct TALER_CoinSpendPrivateKeyP { /** * Taler uses EdDSA for coins when signing deposit requests. */ struct GNUNET_CRYPTO_EddsaPrivateKey eddsa_priv; }; /** * @brief Type of signatures made with Taler coins. */ struct TALER_CoinSpendSignatureP { /** * Taler uses EdDSA for coins. */ struct GNUNET_CRYPTO_EddsaSignature eddsa_signature; }; /** * @brief Type of blinding keys for Taler. * must be 32 bytes (DB) */ union TALER_DenominationBlindingKeyP { /** * Clause Schnorr Signatures have 2 blinding secrets, each containing two unpredictable values. (must be 32 bytes) */ struct GNUNET_CRYPTO_CsNonce nonce; /** * Taler uses RSA for blind signatures. */ struct GNUNET_CRYPTO_RsaBlindingKeySecret rsa_bks; }; /** * Commitment value for the refresh protocol. * See #TALER_refresh_get_commitment(). */ struct TALER_RefreshCommitmentP { /** * The commitment is a hash code. */ struct GNUNET_HashCode session_hash; }; /** * Token used for access control to the merchant's unclaimed * orders. */ struct TALER_ClaimTokenP { /** * The token is a 128-bit UUID. */ struct GNUNET_Uuid token; }; /** * Salt used to hash a merchant's payto:// URI to * compute the "h_wire" (say for deposit requests). */ struct TALER_WireSalt { /** * Actual 128-bit salt value. */ uint32_t salt[4]; }; /** * Hash used to represent an CS public key. Does not include age * restrictions and is ONLY for CS. Used ONLY for interactions with the CS * security module. */ struct TALER_CsPubHashP { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * Hash used to represent an RSA public key. Does not include age * restrictions and is ONLY for RSA. Used ONLY for interactions with the RSA * security module. */ struct TALER_RsaPubHashP { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * Hash @a rsa. * * @param rsa key to hash * @param[out] h_rsa where to write the result */ void TALER_rsa_pub_hash (const struct GNUNET_CRYPTO_RsaPublicKey *rsa, struct TALER_RsaPubHashP *h_rsa); /** * Hash @a cs. * * @param cs key to hash * @param[out] h_cs where to write the result */ void TALER_cs_pub_hash (const struct GNUNET_CRYPTO_CsPublicKey *cs, struct TALER_CsPubHashP *h_cs); /** * Hash used to represent a denomination public key * and associated age restrictions (if any). */ struct TALER_DenominationHash { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * Hash used to represent the private part * of a contract between merchant and consumer. */ struct TALER_PrivateContractHash { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * Hash used to represent the "public" extensions to * a contract that is shared with the exchange. */ struct TALER_ExtensionContractHash { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * Hash used to represent the salted hash of a * merchant's bank account. */ struct TALER_MerchantWireHash { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * Hash used to represent the unsalted hash of a * payto:// URI representing a bank account. */ struct TALER_PaytoHash { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * Hash used to represent a commitment to a blinded * coin, i.e. the hash of the envelope. */ struct TALER_BlindedCoinHash { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * Hash used to represent the hash of the public * key of a coin (without blinding). */ struct TALER_CoinPubHash { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; /** * @brief Value that uniquely identifies a tip. */ struct TALER_TipIdentifierP { /** * The tip identifier is a SHA-512 hash code. */ struct GNUNET_HashCode hash; }; /** * @brief Value that uniquely identifies a tip pick up operation. */ struct TALER_PickupIdentifierP { /** * The pickup identifier is a SHA-512 hash code. */ struct GNUNET_HashCode hash; }; /** * @brief Salted hash over the JSON object representing the configuration of an * extension. */ struct TALER_ExtensionConfigHash { /** * Actual hash value. */ struct GNUNET_HashCode hash; }; GNUNET_NETWORK_STRUCT_END /** * Types of public keys used for denominations in Taler. */ enum TALER_DenominationCipher { /** * Invalid type of signature. */ TALER_DENOMINATION_INVALID = 0, /** * RSA blind signature. */ TALER_DENOMINATION_RSA = 1, /** * Clause Blind Schnorr signature. */ TALER_DENOMINATION_CS = 2 }; /** * @brief Type of (unblinded) coin signatures for Taler. */ struct TALER_DenominationSignature { /** * Type of the signature. */ enum TALER_DenominationCipher cipher; /** * Details, depending on @e cipher. */ union { /** * If we use #TALER_DENOMINATION_CS in @a cipher. */ struct GNUNET_CRYPTO_CsSignature cs_signature; /** * If we use #TALER_DENOMINATION_RSA in @a cipher. */ struct GNUNET_CRYPTO_RsaSignature *rsa_signature; } details; }; /** * The Sign Answer for Clause Blind Schnorr signature. * The sign operation returns a parameter @param b and the signature * scalar @param s_scalar. */ struct TALER_BlindedDenominationCsSignAnswer { /** * To make ROS problem harder, the signer chooses an unpredictable b and only calculates signature of c_b */ unsigned int b; /** * The blinded s scalar calculated from c_b */ struct GNUNET_CRYPTO_CsBlindS s_scalar; }; /** * @brief Type for *blinded* denomination signatures for Taler. * Must be unblinded before it becomes valid. */ struct TALER_BlindedDenominationSignature { /** * Type of the signature. */ enum TALER_DenominationCipher cipher; /** * Details, depending on @e cipher. */ union { /** * If we use #TALER_DENOMINATION_CS in @a cipher. * At this point only the blinded s scalar is used. * The final signature consisting of r,s is built after unblinding. */ struct TALER_BlindedDenominationCsSignAnswer blinded_cs_answer; /** * If we use #TALER_DENOMINATION_RSA in @a cipher. */ struct GNUNET_CRYPTO_RsaSignature *blinded_rsa_signature; } details; }; /** * @brief Type of public signing keys for verifying blindly signed coins. */ struct TALER_DenominationPublicKey { /** * Type of the public key. */ enum TALER_DenominationCipher cipher; /** * Age restriction mask used for the key. */ struct TALER_AgeMask age_mask; /** * Details, depending on @e cipher. */ union { /** * If we use #TALER_DENOMINATION_CS in @a cipher. */ struct GNUNET_CRYPTO_CsPublicKey cs_public_key; /** * If we use #TALER_DENOMINATION_RSA in @a cipher. */ struct GNUNET_CRYPTO_RsaPublicKey *rsa_public_key; } details; }; /** * @brief Type of private signing keys for blind signing of coins. */ struct TALER_DenominationPrivateKey { /** * Type of the public key. */ enum TALER_DenominationCipher cipher; /** * Details, depending on @e cipher. */ union { /** * If we use #TALER_DENOMINATION_CS in @a cipher. */ struct GNUNET_CRYPTO_CsPrivateKey cs_private_key; /** * If we use #TALER_DENOMINATION_RSA in @a cipher. */ struct GNUNET_CRYPTO_RsaPrivateKey *rsa_private_key; } details; }; /** * @brief RSA Parameters to create blinded signature * */ struct TALER_BlindedRsaPlanchet { /** * blinded message to be signed * Note: is malloc()'ed! */ void *blinded_msg; /** * size of the blinded message to be signed */ size_t blinded_msg_size; }; /** * Withdraw nonce for CS denominations */ struct TALER_CsNonce { /** * 32 bit nonce to include in withdrawals */ struct GNUNET_CRYPTO_CsNonce nonce; }; /** * @brief CS Parameters to create blinded signature * */ struct TALER_BlindedCsPlanchet { /** * The Clause Schnorr c_0 and c_1 containing the blinded message */ struct GNUNET_CRYPTO_CsC c[2]; /** * Public Nonce */ struct TALER_CsNonce nonce; }; /** * @brief Type including Parameters to create blinded signature * */ struct TALER_BlindedPlanchet { /** * Type of the sign blinded message */ enum TALER_DenominationCipher cipher; /** * Details, depending on @e cipher. */ union { /** * If we use #TALER_DENOMINATION_CS in @a cipher. */ struct TALER_BlindedCsPlanchet cs_blinded_planchet; /** * If we use #TALER_DENOMINATION_RSA in @a cipher. */ struct TALER_BlindedRsaPlanchet rsa_blinded_planchet; } details; }; /** * Withdraw nonce for CS denominations */ struct TALER_RefreshNonce { /** * 32 bit nonce to include in withdrawals */ struct GNUNET_CRYPTO_CsNonce nonce; }; /** * Public R for Cs denominations */ struct TALER_DenominationCsPublicR { struct GNUNET_CRYPTO_CsRPublic r_pub[2]; }; /** * Secret r for Cs denominations */ struct TALER_DenominationCsPrivateR { struct GNUNET_CRYPTO_CsRSecret r[2]; }; /** * @brief Public information about a coin (including the public key * of the coin, the denomination key and the signature with * the denomination key). */ struct TALER_CoinPublicInfo { /** * The coin's public key. */ struct TALER_CoinSpendPublicKeyP coin_pub; /** * Hash of the public key representing the denomination of the coin that is * being deposited. */ struct TALER_DenominationHash denom_pub_hash; /** * Hash of the age commitment. */ struct TALER_AgeHash age_commitment_hash; /** * (Unblinded) signature over @e coin_pub with @e denom_pub, * which demonstrates that the coin is valid. */ struct TALER_DenominationSignature denom_sig; }; /** * Details for one of the /deposit operations that the * exchange combined into a single wire transfer. */ struct TALER_TrackTransferDetails { /** * Hash of the proposal data. */ struct TALER_PrivateContractHash h_contract_terms; /** * Which coin was deposited? */ struct TALER_CoinSpendPublicKeyP coin_pub; /** * Value of the deposit (including fee). */ struct TALER_Amount coin_value; /** * Fee charged by the exchange for the deposit. */ struct TALER_Amount coin_fee; }; /** * @brief Type of CS Values for withdrawal */ struct TALER_ExchangeWithdrawCsValues { /** * (non-blinded) r_pub */ struct TALER_DenominationCsPublicR r_pub; }; /** * @brief Type of algorithm specific Values for withdrawal */ struct TALER_ExchangeWithdrawValues { /** * Type of the signature. */ enum TALER_DenominationCipher cipher; /** * Details, depending on @e cipher. */ union { /** * If we use #TALER_DENOMINATION_CS in @a cipher. */ struct TALER_ExchangeWithdrawCsValues cs_values; } details; }; /** * Free internals of @a denom_pub, but not @a denom_pub itself. * * @param[in] denom_pub key to free */ void TALER_denom_pub_free (struct TALER_DenominationPublicKey *denom_pub); /** * Create private key for a Taler coin. * * @param[out] coin_priv private key to initialize */ void TALER_planchet_setup_coin_priv ( struct TALER_CoinSpendPrivateKeyP *coin_priv); /** * @brief Method to derive withdraw nonce * * @param coin_priv private key of the coin * @param nonce withdraw nonce included in the request to generate R_0 and R_1 */ void TALER_cs_withdraw_nonce_derive ( const struct TALER_CoinSpendPrivateKeyP *coin_priv, struct TALER_CsNonce *nonce); /** * @brief Method to generate a random withdraw nonce used in refresh protocol * * @param nonce withdraw nonce included in the request to generate R_0 and R_1 */ void TALER_cs_withdraw_nonce_generate (struct TALER_CsNonce *nonce); /** * Initialize denomination public-private key pair. * * For #TALER_DENOMINATION_RSA, an additional "unsigned int" * argument with the number of bits for 'n' (e.g. 2048) must * be passed. * * @param[out] denom_priv where to write the private key * @param[out] deonm_pub where to write the public key * @param cipher which type of cipher to use * @param ... RSA key size (eg. 2048/3072/4096) * @return #GNUNET_OK on success, #GNUNET_NO if parameters were invalid */ enum GNUNET_GenericReturnValue TALER_denom_priv_create (struct TALER_DenominationPrivateKey *denom_priv, struct TALER_DenominationPublicKey *denom_pub, enum TALER_DenominationCipher cipher, ...); /** * Free internals of @a denom_priv, but not @a denom_priv itself. * * @param[in] denom_priv key to free */ void TALER_denom_priv_free (struct TALER_DenominationPrivateKey *denom_priv); /** * Free internals of @a denom_sig, but not @a denom_sig itself. * * @param[in] denom_sig signature to free */ void TALER_denom_sig_free (struct TALER_DenominationSignature *denom_sig); /** * @brief Function for CS signatures to derive public R_0 and R_1 * * @param nonce withdraw nonce from a client * @param denom_priv denomination privkey as long-term secret * @param r_pub the resulting R_0 and R_1 * @return enum GNUNET_GenericReturnValue */ enum GNUNET_GenericReturnValue TALER_denom_cs_derive_r_public (const struct TALER_CsNonce *nonce, const struct TALER_DenominationPrivateKey *denom_priv, struct TALER_DenominationCsPublicR *r_pub); /** * Blind coin for blind signing with @a dk using blinding secret @a coin_bks. * * @param dk denomination public key to blind for * @param coin_bks blinding secret to use * @param age_commitment_hash hash of the age commitment to be used for the coin. NULL if no commitment is made. * @param coin_pub public key of the coin to blind * @param alg_values algorithm specific values to blind the planchet * @param[out] c_hash resulting hashed coin * @param[out] coin_ev blinded coin to submit * @param[out] coin_ev_size number of bytes in @a coin_ev * @return #GNUNET_OK on success */ enum GNUNET_GenericReturnValue TALER_denom_blind (const struct TALER_DenominationPublicKey *dk, const union TALER_DenominationBlindingKeyP *coin_bks, const struct TALER_AgeHash *age_commitment_hash, const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_ExchangeWithdrawValues *alg_values, struct TALER_CoinPubHash *c_hash, struct TALER_BlindedPlanchet *blinded_planchet); /** * Create blinded signature. * * @param[out] denom_sig where to write the signature * @param denom_priv private key to use for signing * @param blinded_planchet the planchet already blinded * @return #GNUNET_OK on success */ enum GNUNET_GenericReturnValue TALER_denom_sign_blinded (struct TALER_BlindedDenominationSignature *denom_sig, const struct TALER_DenominationPrivateKey *denom_priv, const struct TALER_BlindedPlanchet *blinded_planchet); /** * Unblind blinded signature. * * @param[out] denom_sig where to write the unblinded signature * @param bdenom_sig the blinded signature * @param bks blinding secret to use * @param denom_pub public key used for signing * @param alg_values algorithm specific values * @return #GNUNET_OK on success */ enum GNUNET_GenericReturnValue TALER_denom_sig_unblind ( struct TALER_DenominationSignature *denom_sig, const struct TALER_BlindedDenominationSignature *bdenom_sig, const union TALER_DenominationBlindingKeyP *bks, const struct TALER_DenominationPublicKey *denom_pub); /** * Free internals of @a denom_sig, but not @a denom_sig itself. * * @param[in] denom_sig signature to free */ void TALER_blinded_denom_sig_free ( struct TALER_BlindedDenominationSignature *denom_sig); /** * Compute the hash of the given @a denom_pub. * * @param denom_pub public key to hash * @param[out] denom_hash resulting hash value */ void TALER_denom_pub_hash (const struct TALER_DenominationPublicKey *denom_pub, struct TALER_DenominationHash *denom_hash); /** * Make a (deep) copy of the given @a denom_src to * @a denom_dst. * * @param[out] denom_dst target to copy to * @param denom_src public key to copy */ void TALER_denom_pub_deep_copy (struct TALER_DenominationPublicKey *denom_dst, const struct TALER_DenominationPublicKey *denom_src); /** * Make a (deep) copy of the given @a denom_src to * @a denom_dst. * * @param[out] denom_dst target to copy to * @param denom_src public key to copy */ void TALER_denom_sig_deep_copy (struct TALER_DenominationSignature *denom_dst, const struct TALER_DenominationSignature *denom_src); /** * Make a (deep) copy of the given @a denom_src to * @a denom_dst. * * @param[out] denom_dst target to copy to * @param denom_src public key to copy */ void TALER_blinded_denom_sig_deep_copy ( struct TALER_BlindedDenominationSignature *denom_dst, const struct TALER_BlindedDenominationSignature *denom_src); /** * Compare two denomination public keys. * * @param denom1 first key * @param denom2 second key * @return 0 if the keys are equal, otherwise -1 or 1 */ int TALER_denom_pub_cmp (const struct TALER_DenominationPublicKey *denom1, const struct TALER_DenominationPublicKey *denom2); /** * Compare two denomination signatures. * * @param sig1 first signature * @param sig2 second signature * @return 0 if the keys are equal, otherwise -1 or 1 */ int TALER_denom_sig_cmp (const struct TALER_DenominationSignature *sig1, const struct TALER_DenominationSignature *sig2); /** * Compare two blinded denomination signatures. * * @param sig1 first signature * @param sig2 second signature * @return 0 if the keys are equal, otherwise -1 or 1 */ int TALER_blinded_denom_sig_cmp ( const struct TALER_BlindedDenominationSignature *sig1, const struct TALER_BlindedDenominationSignature *sig2); /** * Obtain denomination public key from a denomination private key. * * @param denom_priv private key to convert * @param age_mask age mask to be applied * @param[out] denom_pub where to return the public key */ void TALER_denom_priv_to_pub (const struct TALER_DenominationPrivateKey *denom_priv, const struct TALER_AgeMask age_mask, struct TALER_DenominationPublicKey *denom_pub); /** * Verify signature made with a denomination public key * over a coin. * * @param denom_pub public denomination key * @param denom_sig signature made with the private key * @param c_hash hash over the coin * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_denom_pub_verify (const struct TALER_DenominationPublicKey *denom_pub, const struct TALER_DenominationSignature *denom_sig, const struct TALER_CoinPubHash *c_hash); /** * Check if a coin is valid; that is, whether the denomination key exists, * is not expired, and the signature is correct. * * @param coin_public_info the coin public info to check for validity * @param denom_pub denomination key, must match @a coin_public_info's `denom_pub_hash` * @return #GNUNET_YES if the coin is valid, * #GNUNET_NO if it is invalid * #GNUNET_SYSERR if an internal error occurred */ enum GNUNET_GenericReturnValue TALER_test_coin_valid (const struct TALER_CoinPublicInfo *coin_public_info, const struct TALER_DenominationPublicKey *denom_pub); /** * Compute the hash of a blinded coin. * * @param blinded_planchet blinded planchet * @param denom_pub denomination publick key * @param[out] bch where to write the hash * @return #GNUNET_OK when successful, #GNUNET_SYSERR if an internal error occured */ enum GNUNET_GenericReturnValue TALER_coin_ev_hash (const struct TALER_BlindedPlanchet *blinded_planchet, const struct TALER_DenominationHash *denom_hash, struct TALER_BlindedCoinHash *bch); /** * Compute the hash of a coin. * * @param coin_pub public key of the coin * @param age_commitment_hash hash of the age commitment vector. NULL, if no age commitment was set * @param[out] coin_h where to write the hash */ void TALER_coin_pub_hash (const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_AgeHash *age_commitment_hash, struct TALER_CoinPubHash *coin_h); /** * Compute the hash of a payto URI. * * @param payto URI to hash * @param[out] h_payto where to write the hash */ void TALER_payto_hash (const char *payto, struct TALER_PaytoHash *h_payto); GNUNET_NETWORK_STRUCT_BEGIN /** * Master key material for the deriviation of * private coins and blinding factors. */ struct TALER_PlanchetSecretsP { /** * Key material. */ uint32_t key_data[8]; }; GNUNET_NETWORK_STRUCT_END /** * Details about a planchet that the customer wants to obtain * a withdrawal authorization. This is the information that * will need to be sent to the exchange to obtain the blind * signature required to turn a planchet into a coin. */ struct TALER_PlanchetDetail { /** * Hash of the denomination public key. */ struct TALER_DenominationHash denom_pub_hash; /** * The blinded planchet */ struct TALER_BlindedPlanchet blinded_planchet; }; /** * Information about a (fresh) coin, returned from the API when we * finished creating a coin. Note that @e sig needs to be freed * using the appropriate code. */ struct TALER_FreshCoin { /** * The exchange's signature over the coin's public key. */ struct TALER_DenominationSignature sig; /** * The coin's private key. */ struct TALER_CoinSpendPrivateKeyP coin_priv; /** * FIXME-Oec: Age-verification vector, as pointer: Dyn alloc! */ }; GNUNET_NETWORK_STRUCT_BEGIN /** * @brief Secret used to decrypt the key to decrypt link secrets. */ struct TALER_TransferSecretP { /** * Secret used to derive private inputs for refreshed coins. * Must be (currently) a hash as this is what * GNUNET_CRYPTO_ecc_ecdh() returns to us. */ struct GNUNET_HashCode key; }; /** * Length of the raw value in the Taler wire transfer identifier * (in binary representation). */ #define TALER_BANK_TRANSFER_IDENTIFIER_LEN 32 /** * #TALER_BANK_TRANSFER_IDENTIFIER_LEN as a string. */ #define TALER_BANK_TRANSFER_IDENTIFIER_LEN_STR "32" /** * Raw value of a wire transfer subjects, without the checksum. */ struct TALER_WireTransferIdentifierRawP { /** * Raw value. Note that typical payment systems (SEPA, ACH) support * at least two lines of 27 ASCII characters to encode a transaction * subject or "details", for a total of 54 characters. (The payment * system protocols often support more lines, but the forms presented * to customers are usually limited to 54 characters.) * * With a Base32-encoding of 5 bit per character, this gives us 270 * bits or (rounded down) 33 bytes. So we use the first 32 bytes to * encode the actual value (i.e. a 256-bit / 32-byte public key or * a hash code), and the last byte for a minimalistic checksum. */ uint8_t raw[TALER_BANK_TRANSFER_IDENTIFIER_LEN]; }; /** * Raw value of a wire transfer subject for a wad. */ struct TALER_WadIdentifierP { /** * Wad identifier, in binary encoding. */ uint8_t raw[24]; }; /** * Binary information encoded in Crockford's Base32 in wire transfer * subjects of transfers from Taler to a merchant. The actual value * is chosen by the exchange and has no particular semantics, other than * being unique so that the exchange can lookup details about the wire * transfer when needed. */ struct TALER_WireTransferIdentifierP { /** * Raw value. */ struct TALER_WireTransferIdentifierRawP raw; /** * Checksum using CRC8 over the @e raw data. */ uint8_t crc8; }; GNUNET_NETWORK_STRUCT_END /** * Setup information for a fresh coin, deriving the coin private key * and the blinding factor from the @a secret_seed with a KDF salted * by the @a coin_num_salt. * * @param secret_seed seed to use for KDF to derive coin keys * @param coin_num_salt number of the coin to include in KDF * @param[out] ps value to initialize */ void XXXTALER_planchet_setup_refresh (const struct TALER_TransferSecretP *secret_seed, uint32_t coin_num_salt, struct TALER_PlanchetSecretsP *ps); /** * Setup information for a fresh coin. * * @param[out] ps value to initialize * @oaram alg_values WitdrawValues containing cipher */ void TALER_planchet_setup_random ( struct TALER_PlanchetSecretsP *ps); /** * Create a blinding secret @a bs for @a cipher. * * @param[out] ps planchet with blinding secret to initialize * @param alg_values withdraw values containing cipher and additional CS values */ void XXXTALER_planchet_blinding_secret_create (struct TALER_PlanchetSecretsP *ps, const struct TALER_ExchangeWithdrawValues * alg_values); /** * Prepare a planchet for tipping. Creates and blinds a coin. * * @param dk denomination key for the coin to be created * @param ps secret planchet internals (for #TALER_planchet_to_coin) * @param[out] c_hash set to the hash of the public key of the coin (needed later) * @param[out] pd set to the planchet detail for TALER_MERCHANT_tip_pickup() and * other withdraw operations, pd->blinded_planchet.cipher will be set * to cipher from dk * @return #GNUNET_OK on success */ enum GNUNET_GenericReturnValue XXXTALER_planchet_prepare (const struct TALER_DenominationPublicKey *dk, const struct TALER_ExchangeWithdrawValues *alg_values, struct TALER_PlanchetSecretsP *ps, struct TALER_CoinPubHash *c_hash, struct TALER_PlanchetDetail *pd); /** * Frees blinded message inside blinded planchet depending on blinded_planchet->cipher * Does not free the @a blinded_planchet itself! * * @param blinded_planchet blnded planchet */ void TALER_blinded_planchet_free (struct TALER_BlindedPlanchet *blinded_planchet); /** * Obtain a coin from the planchet's secrets and the blind signature * of the exchange. * * @param dk denomination key, must match what was given to #TALER_planchet_prepare() * @param blind_sig blind signature from the exchange * @param ps secrets from #TALER_planchet_prepare() * @param c_hash hash of the coin's public key for verification of the signature * @param[out] coin set to the details of the fresh coin * @return #GNUNET_OK on success */ enum GNUNET_GenericReturnValue XXXTALER_planchet_to_coin (const struct TALER_DenominationPublicKey *dk, const struct TALER_BlindedDenominationSignature *blind_sig, const struct TALER_PlanchetSecretsP *ps, const struct TALER_CoinPubHash *c_hash, const struct TALER_ExchangeWithdrawValues *alg_values, struct TALER_FreshCoin *coin); /* ****************** Refresh crypto primitives ************* */ /** * Given the coin and the transfer private keys, compute the * transfer secret. (Technically, we only need one of the two * private keys, but the caller currently trivially only has * the two private keys, so we derive one of the public keys * internally to this function.) * * @param coin_priv coin key * @param trans_priv transfer private key * @param[out] ts computed transfer secret */ void TALER_link_derive_transfer_secret ( const struct TALER_CoinSpendPrivateKeyP *coin_priv, const struct TALER_TransferPrivateKeyP *trans_priv, struct TALER_TransferSecretP *ts); /** * Decrypt the shared @a secret from the information in the * @a trans_priv and @a coin_pub. * * @param trans_priv transfer private key * @param coin_pub coin public key * @param[out] transfer_secret set to the shared secret */ void TALER_link_reveal_transfer_secret ( const struct TALER_TransferPrivateKeyP *trans_priv, const struct TALER_CoinSpendPublicKeyP *coin_pub, struct TALER_TransferSecretP *transfer_secret); /** * Decrypt the shared @a secret from the information in the * @a trans_priv and @a coin_pub. * * @param trans_pub transfer private key * @param coin_priv coin public key * @param[out] transfer_secret set to the shared secret */ void TALER_link_recover_transfer_secret ( const struct TALER_TransferPublicKeyP *trans_pub, const struct TALER_CoinSpendPrivateKeyP *coin_priv, struct TALER_TransferSecretP *transfer_secret); /** * Information about a coin to be created during a refresh operation. */ struct TALER_RefreshCoinData { /** * The denomination's public key. */ const struct TALER_DenominationPublicKey *dk; /** * The envelope with the blinded coin. */ void *coin_ev; /** * Number of bytes in @a coin_ev */ size_t coin_ev_size; }; /** * One of the #TALER_CNC_KAPPA commitments. */ struct TALER_RefreshCommitmentEntry { /** * Transfer public key of this commitment. */ struct TALER_TransferPublicKeyP transfer_pub; /** * Array of @e num_new_coins new coins to be created. */ struct TALER_RefreshCoinData *new_coins; }; /** * Compute the commitment for a /refresh/melt operation from * the respective public inputs. * * @param[out] rc set to the value the wallet must commit to * @param kappa number of transfer public keys involved (must be #TALER_CNC_KAPPA) * @param num_new_coins number of new coins to be created * @param rcs array of @a kappa commitments * @param coin_pub public key of the coin to be melted * @param amount_with_fee amount to be melted, including fee */ void TALER_refresh_get_commitment (struct TALER_RefreshCommitmentP *rc, uint32_t kappa, uint32_t num_new_coins, const struct TALER_RefreshCommitmentEntry *rcs, const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_Amount *amount_with_fee); /* **************** Helper-based RSA operations **************** */ /** * Handle for talking to an Denomination key signing helper. */ struct TALER_CRYPTO_RsaDenominationHelper; /** * Function called with information about available keys for signing. Usually * only called once per key upon connect. Also called again in case a key is * being revoked, in that case with an @a end_time of zero. * * @param cls closure * @param section_name name of the denomination type in the configuration; * NULL if the key has been revoked or purged * @param start_time when does the key become available for signing; * zero if the key has been revoked or purged * @param validity_duration how long does the key remain available for signing; * zero if the key has been revoked or purged * @param h_rsa hash of the RSA @a denom_pub that is available (or was purged) * @param denom_pub the public key itself, NULL if the key was revoked or purged * @param sm_pub public key of the security module, NULL if the key was revoked or purged * @param sm_sig signature from the security module, NULL if the key was revoked or purged * The signature was already verified against @a sm_pub. */ typedef void (*TALER_CRYPTO_RsaDenominationKeyStatusCallback)( void *cls, const char *section_name, struct GNUNET_TIME_Timestamp start_time, struct GNUNET_TIME_Relative validity_duration, const struct TALER_RsaPubHashP *h_rsa, const struct TALER_DenominationPublicKey *denom_pub, const struct TALER_SecurityModulePublicKeyP *sm_pub, const struct TALER_SecurityModuleSignatureP *sm_sig); /** * Initiate connection to an denomination key helper. * * @param cfg configuration to use * @param dkc function to call with key information * @param dkc_cls closure for @a dkc * @return NULL on error (such as bad @a cfg). */ struct TALER_CRYPTO_RsaDenominationHelper * TALER_CRYPTO_helper_rsa_connect ( const struct GNUNET_CONFIGURATION_Handle *cfg, TALER_CRYPTO_RsaDenominationKeyStatusCallback dkc, void *dkc_cls); /** * Function to call to 'poll' for updates to the available key material. * Should be called whenever it is important that the key material status is * current, like when handling a "/keys" request. This function basically * briefly checks if there are messages from the helper announcing changes to * denomination keys. * * @param dh helper process connection */ void TALER_CRYPTO_helper_rsa_poll (struct TALER_CRYPTO_RsaDenominationHelper *dh); /** * Request helper @a dh to sign @a msg using the public key corresponding to * @a h_denom_pub. * * This operation will block until the signature has been obtained. Should * this process receive a signal (that is not ignored) while the operation is * pending, the operation will fail. Note that the helper may still believe * that it created the signature. Thus, signals may result in a small * differences in the signature counters. Retrying in this case may work. * * @param dh helper process connection * @param h_rsa hash of the RSA public key to use to sign * @param msg message to sign * @param msg_size number of bytes in @a msg * @param[out] ec set to the error code (or #TALER_EC_NONE on success) * @return signature, the value inside the structure will be NULL on failure, * see @a ec for details about the failure */ struct TALER_BlindedDenominationSignature TALER_CRYPTO_helper_rsa_sign ( struct TALER_CRYPTO_RsaDenominationHelper *dh, const struct TALER_RsaPubHashP *h_rsa, const void *msg, size_t msg_size, enum TALER_ErrorCode *ec); /** * Ask the helper to revoke the public key associated with @param h_denom_pub . * Will cause the helper to tell all clients that the key is now unavailable, * and to create a replacement key. * * This operation will block until the revocation request has been * transmitted. Should this process receive a signal (that is not ignored) * while the operation is pending, the operation may fail. If the key is * unknown, this function will also appear to have succeeded. To be sure that * the revocation worked, clients must watch the denomination key status * callback. * * @param dh helper to process connection * @param h_rsa hash of the RSA public key to revoke */ void TALER_CRYPTO_helper_rsa_revoke ( struct TALER_CRYPTO_RsaDenominationHelper *dh, const struct TALER_RsaPubHashP *h_rsa); /** * Close connection to @a dh. * * @param[in] dh connection to close */ void TALER_CRYPTO_helper_rsa_disconnect ( struct TALER_CRYPTO_RsaDenominationHelper *dh); /* **************** Helper-based CS operations **************** */ /** * Handle for talking to an Denomination key signing helper. */ struct TALER_CRYPTO_CsDenominationHelper; /** * Function called with information about available keys for signing. Usually * only called once per key upon connect. Also called again in case a key is * being revoked, in that case with an @a end_time of zero. * * @param cls closure * @param section_name name of the denomination type in the configuration; * NULL if the key has been revoked or purged * @param start_time when does the key become available for signing; * zero if the key has been revoked or purged * @param validity_duration how long does the key remain available for signing; * zero if the key has been revoked or purged * @param h_cs hash of the CS @a denom_pub that is available (or was purged) * @param denom_pub the public key itself, NULL if the key was revoked or purged * @param sm_pub public key of the security module, NULL if the key was revoked or purged * @param sm_sig signature from the security module, NULL if the key was revoked or purged * The signature was already verified against @a sm_pub. */ typedef void (*TALER_CRYPTO_CsDenominationKeyStatusCallback)( void *cls, const char *section_name, struct GNUNET_TIME_Timestamp start_time, struct GNUNET_TIME_Relative validity_duration, const struct TALER_CsPubHashP *h_cs, const struct TALER_DenominationPublicKey *denom_pub, const struct TALER_SecurityModulePublicKeyP *sm_pub, const struct TALER_SecurityModuleSignatureP *sm_sig); /** * Initiate connection to an denomination key helper. * * @param cfg configuration to use * @param dkc function to call with key information * @param dkc_cls closure for @a dkc * @return NULL on error (such as bad @a cfg). */ struct TALER_CRYPTO_CsDenominationHelper * TALER_CRYPTO_helper_cs_connect ( const struct GNUNET_CONFIGURATION_Handle *cfg, TALER_CRYPTO_CsDenominationKeyStatusCallback dkc, void *dkc_cls); /** * Function to call to 'poll' for updates to the available key material. * Should be called whenever it is important that the key material status is * current, like when handling a "/keys" request. This function basically * briefly checks if there are messages from the helper announcing changes to * denomination keys. * * @param dh helper process connection */ void TALER_CRYPTO_helper_cs_poll (struct TALER_CRYPTO_CsDenominationHelper *dh); /** * Request helper @a dh to sign @a msg using the public key corresponding to * @a h_denom_pub. * * This operation will block until the signature has been obtained. Should * this process receive a signal (that is not ignored) while the operation is * pending, the operation will fail. Note that the helper may still believe * that it created the signature. Thus, signals may result in a small * differences in the signature counters. Retrying in this case may work. * * @param dh helper process connection * @param h_cs hash of the CS public key to use to sign * @param blinded_planchet blinded planchet containing c and nonce * @param[out] ec set to the error code (or #TALER_EC_NONE on success) * @return signature, the value inside the structure will be NULL on failure, * see @a ec for details about the failure */ struct TALER_BlindedDenominationSignature TALER_CRYPTO_helper_cs_sign ( struct TALER_CRYPTO_CsDenominationHelper *dh, const struct TALER_CsPubHashP *h_cs, const struct TALER_BlindedCsPlanchet *blinded_planchet, enum TALER_ErrorCode *ec); /** * Ask the helper to revoke the public key associated with @param h_cs . * Will cause the helper to tell all clients that the key is now unavailable, * and to create a replacement key. * * This operation will block until the revocation request has been * transmitted. Should this process receive a signal (that is not ignored) * while the operation is pending, the operation may fail. If the key is * unknown, this function will also appear to have succeeded. To be sure that * the revocation worked, clients must watch the denomination key status * callback. * * @param dh helper to process connection * @param h_cs hash of the CS public key to revoke */ void TALER_CRYPTO_helper_cs_revoke ( struct TALER_CRYPTO_CsDenominationHelper *dh, const struct TALER_CsPubHashP *h_cs); /** * Ask the helper to derive R using the @param nonce and denomination key * associated with @param h_cs. * * This operation will block until the R has been obtained. Should * this process receive a signal (that is not ignored) while the operation is * pending, the operation will fail. Note that the helper may still believe * that it created the signature. Thus, signals may result in a small * differences in the signature counters. Retrying in this case may work. * * @param dh helper to process connection * @param h_cs hash of the CS public key to revoke * @param nonce witdhraw nonce * @param[out] ec set to the error code (or #TALER_EC_NONE on success) * @return R, the value inside the structure will be NULL on failure, * see @a ec for details about the failure */ struct TALER_DenominationCsPublicR TALER_CRYPTO_helper_cs_r_derive (struct TALER_CRYPTO_CsDenominationHelper *dh, const struct TALER_CsPubHashP *h_cs, const struct TALER_CsNonce *nonce, enum TALER_ErrorCode *ec); /** * Close connection to @a dh. * * @param[in] dh connection to close */ void TALER_CRYPTO_helper_cs_disconnect ( struct TALER_CRYPTO_CsDenominationHelper *dh); /** * Handle for talking to an online key signing helper. */ struct TALER_CRYPTO_ExchangeSignHelper; /** * Function called with information about available keys for signing. Usually * only called once per key upon connect. Also called again in case a key is * being revoked, in that case with an @a end_time of zero. * * @param cls closure * @param start_time when does the key become available for signing; * zero if the key has been revoked or purged * @param validity_duration how long does the key remain available for signing; * zero if the key has been revoked or purged * @param exchange_pub the public key itself, NULL if the key was revoked or purged * @param sm_pub public key of the security module, NULL if the key was revoked or purged * @param sm_sig signature from the security module, NULL if the key was revoked or purged * The signature was already verified against @a sm_pub. */ typedef void (*TALER_CRYPTO_ExchangeKeyStatusCallback)( void *cls, struct GNUNET_TIME_Timestamp start_time, struct GNUNET_TIME_Relative validity_duration, const struct TALER_ExchangePublicKeyP *exchange_pub, const struct TALER_SecurityModulePublicKeyP *sm_pub, const struct TALER_SecurityModuleSignatureP *sm_sig); /** * Initiate connection to an online signing key helper. * * @param cfg configuration to use * @param ekc function to call with key information * @param ekc_cls closure for @a ekc * @return NULL on error (such as bad @a cfg). */ struct TALER_CRYPTO_ExchangeSignHelper * TALER_CRYPTO_helper_esign_connect ( const struct GNUNET_CONFIGURATION_Handle *cfg, TALER_CRYPTO_ExchangeKeyStatusCallback ekc, void *ekc_cls); /** * Function to call to 'poll' for updates to the available key material. * Should be called whenever it is important that the key material status is * current, like when handling a "/keys" request. This function basically * briefly checks if there are messages from the helper announcing changes to * exchange online signing keys. * * @param esh helper process connection */ void TALER_CRYPTO_helper_esign_poll (struct TALER_CRYPTO_ExchangeSignHelper *esh); /** * Request helper @a esh to sign @a msg using the current online * signing key. * * This operation will block until the signature has been obtained. Should * this process receive a signal (that is not ignored) while the operation is * pending, the operation will fail. Note that the helper may still believe * that it created the signature. Thus, signals may result in a small * differences in the signature counters. Retrying in this case may work. * * @param esh helper process connection * @param purpose message to sign (must extend beyond the purpose) * @param[out] exchange_pub set to the public key used for the signature upon success * @param[out] exchange_sig set to the signature upon success * @return the error code (or #TALER_EC_NONE on success) */ enum TALER_ErrorCode TALER_CRYPTO_helper_esign_sign_ ( struct TALER_CRYPTO_ExchangeSignHelper *esh, const struct GNUNET_CRYPTO_EccSignaturePurpose *purpose, struct TALER_ExchangePublicKeyP *exchange_pub, struct TALER_ExchangeSignatureP *exchange_sig); /** * Request helper @a esh to sign @a msg using the current online * signing key. * * This operation will block until the signature has been obtained. Should * this process receive a signal (that is not ignored) while the operation is * pending, the operation will fail. Note that the helper may still believe * that it created the signature. Thus, signals may result in a small * differences in the signature counters. Retrying in this case may work. * * @param esh helper process connection * @param ps message to sign (MUST begin with a purpose) * @param[out] epub set to the public key used for the signature upon success * @param[out] esig set to the signature upon success * @return the error code (or #TALER_EC_NONE on success) */ #define TALER_CRYPTO_helper_esign_sign(esh,ps,epub,esig) ( \ /* check size is set correctly */ \ GNUNET_assert (ntohl ((ps)->purpose.size) == sizeof (*ps)), \ /* check 'ps' begins with the purpose */ \ GNUNET_static_assert (((void*) (ps)) == \ ((void*) &(ps)->purpose)), \ TALER_CRYPTO_helper_esign_sign_ (esh, \ &(ps)->purpose, \ epub, \ esig) ) /** * Ask the helper to revoke the public key @param exchange_pub . * Will cause the helper to tell all clients that the key is now unavailable, * and to create a replacement key. * * This operation will block until the revocation request has been * transmitted. Should this process receive a signal (that is not ignored) * while the operation is pending, the operation may fail. If the key is * unknown, this function will also appear to have succeeded. To be sure that * the revocation worked, clients must watch the signing key status callback. * * @param esh helper to process connection * @param exchange_pub the public key to revoke */ void TALER_CRYPTO_helper_esign_revoke ( struct TALER_CRYPTO_ExchangeSignHelper *esh, const struct TALER_ExchangePublicKeyP *exchange_pub); /** * Close connection to @a esh. * * @param[in] esh connection to close */ void TALER_CRYPTO_helper_esign_disconnect ( struct TALER_CRYPTO_ExchangeSignHelper *esh); /* ********************* exchange signing ************************** */ /** * Verify a deposit confirmation. * * @param h_contract_terms hash of the contact of the merchant with the customer (further details are never disclosed to the exchange) * @param h_wire hash of the merchant’s account details * @param h_extensions hash over the extensions, can be NULL * @param exchange_timestamp timestamp when the contract was finalized, must not be too far off * @param wire_deadline date until which the exchange should wire the funds * @param refund_deadline date until which the merchant can issue a refund to the customer via the exchange (can be zero if refunds are not allowed); must not be after the @a wire_deadline * @param amount_without_fee the amount to be deposited after fees * @param coin_pub public key of the deposited coin * @param merchant_pub the public key of the merchant (used to identify the merchant for refund requests) * @param exchange_pub exchange's online signing public key * @param exchange_sig the signature made with purpose #TALER_SIGNATURE_EXCHANGE_CONFIRM_DEPOSIT * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_exchange_deposit_confirm_verify ( const struct TALER_PrivateContractHash *h_contract_terms, const struct TALER_MerchantWireHash *h_wire, const struct TALER_ExtensionContractHash *h_extensions, struct GNUNET_TIME_Timestamp exchange_timestamp, struct GNUNET_TIME_Timestamp wire_deadline, struct GNUNET_TIME_Timestamp refund_deadline, const struct TALER_Amount *amount_without_fee, const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_MerchantPublicKeyP *merchant_pub, const struct TALER_ExchangePublicKeyP *exchange_pub, const struct TALER_ExchangeSignatureP *exchange_sig); /* ********************* wallet signing ************************** */ /** * Sign a deposit permission. Function for wallets. * * @param amount the amount to be deposited * @param deposit_fee the deposit fee we expect to pay * @param h_wire hash of the merchant’s account details * @param h_contract_terms hash of the contact of the merchant with the customer (further details are never disclosed to the exchange) * @param h_extensions hash over the extensions * @param h_denom_pub hash of the coin denomination's public key * @param coin_priv coin’s private key * @param wallet_timestamp timestamp when the contract was finalized, must not be too far in the future * @param merchant_pub the public key of the merchant (used to identify the merchant for refund requests) * @param refund_deadline date until which the merchant can issue a refund to the customer via the exchange (can be zero if refunds are not allowed); must not be after the @a wire_deadline * @param[out] coin_sig set to the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_DEPOSIT */ void TALER_wallet_deposit_sign ( const struct TALER_Amount *amount, const struct TALER_Amount *deposit_fee, const struct TALER_MerchantWireHash *h_wire, const struct TALER_PrivateContractHash *h_contract_terms, const struct TALER_ExtensionContractHash *h_extensions, const struct TALER_DenominationHash *h_denom_pub, struct GNUNET_TIME_Timestamp wallet_timestamp, const struct TALER_MerchantPublicKeyP *merchant_pub, struct GNUNET_TIME_Timestamp refund_deadline, const struct TALER_CoinSpendPrivateKeyP *coin_priv, struct TALER_CoinSpendSignatureP *coin_sig); /** * Verify a deposit permission. * * @param amount the amount to be deposited * @param deposit_fee the deposit fee we expect to pay * @param h_wire hash of the merchant’s account details * @param h_contract_terms hash of the contact of the merchant with the customer (further details are never disclosed to the exchange) * @param h_extensions hash over the extensions * @param h_denom_pub hash of the coin denomination's public key * @param wallet_timestamp timestamp when the contract was finalized, must not be too far in the future * @param merchant_pub the public key of the merchant (used to identify the merchant for refund requests) * @param refund_deadline date until which the merchant can issue a refund to the customer via the exchange (can be zero if refunds are not allowed); must not be after the @a wire_deadline * @param coin_pub coin’s public key * @param coin_sig the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_DEPOSIT * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_wallet_deposit_verify ( const struct TALER_Amount *amount, const struct TALER_Amount *deposit_fee, const struct TALER_MerchantWireHash *h_wire, const struct TALER_PrivateContractHash *h_contract_terms, const struct TALER_ExtensionContractHash *h_extensions, const struct TALER_DenominationHash *h_denom_pub, struct GNUNET_TIME_Timestamp wallet_timestamp, const struct TALER_MerchantPublicKeyP *merchant_pub, struct GNUNET_TIME_Timestamp refund_deadline, const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_CoinSpendSignatureP *coin_sig); /** * Sign a melt request. * * @param amount the amount to be melted (with fee) * @param melt_fee the melt fee we expect to pay * @param rc refresh session we are committed to * @param h_denom_pub hash of the coin denomination's public key * @param coin_priv coin’s private key * @param[out] coin_sig set to the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_MELT */ void TALER_wallet_melt_sign ( const struct TALER_Amount *amount_with_fee, const struct TALER_Amount *melt_fee, const struct TALER_RefreshCommitmentP *rc, const struct TALER_DenominationHash *h_denom_pub, const struct TALER_CoinSpendPrivateKeyP *coin_priv, struct TALER_CoinSpendSignatureP *coin_sig); /** * Verify a melt request. * * @param amount the amount to be melted (with fee) * @param melt_fee the melt fee we expect to pay * @param rc refresh session we are committed to * @param h_denom_pub hash of the coin denomination's public key * @param coin_pub coin’s public key * @param coin_sig the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_MELT * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_wallet_melt_verify ( const struct TALER_Amount *amount_with_fee, const struct TALER_Amount *melt_fee, const struct TALER_RefreshCommitmentP *rc, const struct TALER_DenominationHash *h_denom_pub, const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_CoinSpendSignatureP *coin_sig); /** * Sign link data. * * @param h_denom_pub hash of the denomiantion public key of the new coin * @param transfer_pub transfer public key * @param coin_ev coin envelope * @param coin_ev_size number of bytes in @a coin_ev * @param old_coin_priv private key to sign with * @param[out] coin_sig resulting signature */ void TALER_wallet_link_sign (const struct TALER_DenominationHash *h_denom_pub, const struct TALER_TransferPublicKeyP *transfer_pub, const void *coin_ev, size_t coin_ev_size, const struct TALER_CoinSpendPrivateKeyP *old_coin_priv, struct TALER_CoinSpendSignatureP *coin_sig); /** * Verify link signature. * * @param h_denom_pub hash of the denomiantion public key of the new coin * @param transfer_pub transfer public key * @param h_coin_ev hash of the coin envelope * @param old_coin_pub old coin key that the link signature is for * @param coin_sig resulting signature * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_wallet_link_verify ( const struct TALER_DenominationHash *h_denom_pub, const struct TALER_TransferPublicKeyP *transfer_pub, const struct TALER_BlindedCoinHash *h_coin_ev, const struct TALER_CoinSpendPublicKeyP *old_coin_pub, const struct TALER_CoinSpendSignatureP *coin_sig); /** * Sign link data. * * @param h_denom_pub hash of the denomiantion public key of the new coin * @param transfer_pub transfer public key * @param coin_ev coin envelope * @param coin_ev_size number of bytes in @a coin_ev * @param old_coin_priv private key to sign with * @param[out] coin_sig resulting signature */ void TALER_wallet_link_sign (const struct TALER_DenominationHash *h_denom_pub, const struct TALER_TransferPublicKeyP *transfer_pub, const void *coin_ev, size_t coin_ev_size, const struct TALER_CoinSpendPrivateKeyP *old_coin_priv, struct TALER_CoinSpendSignatureP *coin_sig); /** * Verify recoup signature. * * @param h_denom_pub hash of the denomiantion public key of the coin * @param coin_bks blinding factor used when withdrawing the coin * @param coin_pub coin key of the coin to be recouped * @param coin_sig resulting signature * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_wallet_recoup_verify ( const struct TALER_DenominationHash *h_denom_pub, const union TALER_DenominationBlindingKeyP *coin_bks, const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_CoinSpendSignatureP *coin_sig); /** * Create recoup signature. * * @param h_denom_pub hash of the denomiantion public key of the coin * @param coin_bks blinding factor used when withdrawing the coin * @param requested_amount amount that is left to be recouped * @param coin_priv coin key of the coin to be recouped * @param coin_sig resulting signature */ void TALER_wallet_recoup_sign ( const struct TALER_DenominationHash *h_denom_pub, const union TALER_DenominationBlindingKeyP *coin_bks, const struct TALER_CoinSpendPrivateKeyP *coin_priv, struct TALER_CoinSpendSignatureP *coin_sig); /** * Verify recoup-refresh signature. * * @param h_denom_pub hash of the denomiantion public key of the coin * @param coin_bks blinding factor used when withdrawing the coin * @param coin_pub coin key of the coin to be recouped * @param coin_sig resulting signature * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_wallet_recoup_refresh_verify ( const struct TALER_DenominationHash *h_denom_pub, const union TALER_DenominationBlindingKeyP *coin_bks, const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_CoinSpendSignatureP *coin_sig); /** * Create recoup-refresh signature. * * @param h_denom_pub hash of the denomiantion public key of the coin * @param coin_bks blinding factor used when withdrawing the coin * @param requested_amount amount that is left to be recouped * @param coin_priv coin key of the coin to be recouped * @param coin_sig resulting signature */ void TALER_wallet_recoup_refresh_sign ( const struct TALER_DenominationHash *h_denom_pub, const union TALER_DenominationBlindingKeyP *coin_bks, const struct TALER_CoinSpendPrivateKeyP *coin_priv, struct TALER_CoinSpendSignatureP *coin_sig); /* ********************* merchant signing ************************** */ /** * Create merchant signature approving a refund. * * @param coin_pub coin to be refunded * @param h_contract_terms contract to be refunded * @param rtransaction_id unique ID for this (partial) refund * @param amount amount to be refunded * @param merchant_priv private key to sign with * @param[out] merchant_sig where to write the signature */ void TALER_merchant_refund_sign ( const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_PrivateContractHash *h_contract_terms, uint64_t rtransaction_id, const struct TALER_Amount *amount, const struct TALER_MerchantPrivateKeyP *merchant_priv, struct TALER_MerchantSignatureP *merchant_sig); /** * Verify merchant signature approving a refund. * * @param coin_pub coin to be refunded * @param h_contract_terms contract to be refunded * @param rtransaction_id unique ID for this (partial) refund * @param amount amount to be refunded * @param merchant_pub public key of the merchant * @param merchant_sig signature to verify * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_merchant_refund_verify ( const struct TALER_CoinSpendPublicKeyP *coin_pub, const struct TALER_PrivateContractHash *h_contract_terms, uint64_t rtransaction_id, const struct TALER_Amount *amount, const struct TALER_MerchantPublicKeyP *merchant_pub, const struct TALER_MerchantSignatureP *merchant_sig); /* ********************* offline signing ************************** */ /** * Create auditor addition signature. * * @param auditor_pub public key of the auditor * @param auditor_url URL of the auditor * @param start_date when to enable the auditor (for replay detection) * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ 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); /** * Verify auditor add signature. * * @param auditor_pub public key of the auditor * @param auditor_url URL of the auditor * @param start_date when to enable the auditor (for replay detection) * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Create auditor deletion signature. * * @param auditor_pub public key of the auditor * @param end_date when to disable the auditor (for replay detection) * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ 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); /** * Verify auditor del signature. * * @param auditor_pub public key of the auditor * @param end_date when to disable the auditor (for replay detection) * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Create denomination revocation signature. * * @param h_denom_pub hash of public denomination key to revoke * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ 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); /** * Verify denomination revocation signature. * * @param h_denom_pub hash of public denomination key to revoke * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Create signkey revocation signature. * * @param exchange_pub public signing key to revoke * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ void TALER_exchange_offline_signkey_revoke_sign ( const struct TALER_ExchangePublicKeyP *exchange_pub, const struct TALER_MasterPrivateKeyP *master_priv, struct TALER_MasterSignatureP *master_sig); /** * Verify signkey revocation signature. * * @param exchange_pub public signkey key to revoke * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Create signkey validity signature. * * @param exchange_pub public signing key to validate * @param start_sign starting point of validity for signing * @param end_sign end point (exclusive) for validity for signing * @param end_legal legal end point of signature validity * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ 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); /** * Verify signkey validitity signature. * * @param exchange_pub public signkey key to validate * @param start_sign starting point of validity for signing * @param end_sign end point (exclusive) for validity for signing * @param end_legal legal end point of signature validity * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Create denomination key validity signature. * * @param h_denom_pub hash of the denomination's public key * @param stamp_start when does the exchange begin signing with this key * @param stamp_expire_withdraw when does the exchange end signing with this key * @param stamp_expire_deposit how long does the exchange accept the deposit of coins with this key * @param stamp_expire_legal how long does the exchange preserve information for legal disputes with this key * @param coin_value what is the value of coins signed with this key * @param fee_withdraw what withdraw fee does the exchange charge for this denomination * @param fee_deposit what deposit fee does the exchange charge for this denomination * @param fee_refresh what refresh fee does the exchange charge for this denomination * @param fee_refund what refund fee does the exchange charge for this denomination * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ 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); /** * Verify denomination key validity signature. * * @param h_denom_pub hash of the denomination's public key * @param stamp_start when does the exchange begin signing with this key * @param stamp_expire_withdraw when does the exchange end signing with this key * @param stamp_expire_deposit how long does the exchange accept the deposit of coins with this key * @param stamp_expire_legal how long does the exchange preserve information for legal disputes with this key * @param coin_value what is the value of coins signed with this key * @param fee_withdraw what withdraw fee does the exchange charge for this denomination * @param fee_deposit what deposit fee does the exchange charge for this denomination * @param fee_refresh what refresh fee does the exchange charge for this denomination * @param fee_refund what refund fee does the exchange charge for this denomination * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Create security module EdDSA signature. * * @param exchange_pub public signing key to validate * @param start_sign starting point of validity for signing * @param duration how long will the key be in use * @param secm_priv security module key to sign with * @param[out] secm_sig where to write the signature */ void TALER_exchange_secmod_eddsa_sign ( const struct TALER_ExchangePublicKeyP *exchange_pub, struct GNUNET_TIME_Timestamp start_sign, struct GNUNET_TIME_Relative duration, const struct TALER_SecurityModulePrivateKeyP *secm_priv, struct TALER_SecurityModuleSignatureP *secm_sig); /** * Verify security module EdDSA signature. * * @param exchange_pub public signing key to validate * @param start_sign starting point of validity for signing * @param duration how long will the key be in use * @param secm_pub public key to verify against * @param secm_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_exchange_secmod_eddsa_verify ( const struct TALER_ExchangePublicKeyP *exchange_pub, struct GNUNET_TIME_Timestamp start_sign, struct GNUNET_TIME_Relative duration, const struct TALER_SecurityModulePublicKeyP *secm_pub, const struct TALER_SecurityModuleSignatureP *secm_sig); /** * Create security module denomination signature. * * @param h_rsa hash of the RSA public key to sign * @param section_name name of the section in the configuration * @param start_sign starting point of validity for signing * @param duration how long will the key be in use * @param secm_priv security module key to sign with * @param[out] secm_sig where to write the signature */ void TALER_exchange_secmod_rsa_sign ( const struct TALER_RsaPubHashP *h_rsa, const char *section_name, struct GNUNET_TIME_Timestamp start_sign, struct GNUNET_TIME_Relative duration, const struct TALER_SecurityModulePrivateKeyP *secm_priv, struct TALER_SecurityModuleSignatureP *secm_sig); /** * Verify security module denomination signature. * * @param h_rsa hash of the public key to validate * @param section_name name of the section in the configuration * @param start_sign starting point of validity for signing * @param duration how long will the key be in use * @param secm_pub public key to verify against * @param secm_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_exchange_secmod_rsa_verify ( const struct TALER_RsaPubHashP *h_rsa, const char *section_name, struct GNUNET_TIME_Timestamp start_sign, struct GNUNET_TIME_Relative duration, const struct TALER_SecurityModulePublicKeyP *secm_pub, const struct TALER_SecurityModuleSignatureP *secm_sig); /** * Create security module denomination signature. * * @param h_cs hash of the CS public key to sign * @param section_name name of the section in the configuration * @param start_sign starting point of validity for signing * @param duration how long will the key be in use * @param secm_priv security module key to sign with * @param[out] secm_sig where to write the signature */ void TALER_exchange_secmod_cs_sign ( const struct TALER_CsPubHashP *h_cs, const char *section_name, struct GNUNET_TIME_Timestamp start_sign, struct GNUNET_TIME_Relative duration, const struct TALER_SecurityModulePrivateKeyP *secm_priv, struct TALER_SecurityModuleSignatureP *secm_sig); /** * Verify security module denomination signature. * * @param h_cs hash of the public key to validate * @param section_name name of the section in the configuration * @param start_sign starting point of validity for signing * @param duration how long will the key be in use * @param secm_pub public key to verify against * @param secm_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_exchange_secmod_cs_verify ( const struct TALER_CsPubHashP *h_cs, const char *section_name, struct GNUNET_TIME_Timestamp start_sign, struct GNUNET_TIME_Relative duration, const struct TALER_SecurityModulePublicKeyP *secm_pub, const struct TALER_SecurityModuleSignatureP *secm_sig); /** * Create denomination key validity signature by the auditor. * * @param auditor_url BASE URL of the auditor's API * @param h_denom_pub hash of the denomination's public key * @param master_pub master public key of the exchange * @param stamp_start when does the exchange begin signing with this key * @param stamp_expire_withdraw when does the exchange end signing with this key * @param stamp_expire_deposit how long does the exchange accept the deposit of coins with this key * @param stamp_expire_legal how long does the exchange preserve information for legal disputes with this key * @param coin_value what is the value of coins signed with this key * @param fee_withdraw what withdraw fee does the exchange charge for this denomination * @param fee_deposit what deposit fee does the exchange charge for this denomination * @param fee_refresh what refresh fee does the exchange charge for this denomination * @param fee_refund what refund fee does the exchange charge for this denomination * @param auditor_priv private key to sign with * @param[out] auditor_sig where to write the signature */ void TALER_auditor_denom_validity_sign ( const char *auditor_url, const struct TALER_DenominationHash *h_denom_pub, const struct TALER_MasterPublicKeyP *master_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_AuditorPrivateKeyP *auditor_priv, struct TALER_AuditorSignatureP *auditor_sig); /** * Verify denomination key validity signature from auditor. * * @param auditor_url BASE URL of the auditor's API * @param h_denom_pub hash of the denomination's public key * @param master_pub master public key of the exchange * @param stamp_start when does the exchange begin signing with this key * @param stamp_expire_withdraw when does the exchange end signing with this key * @param stamp_expire_deposit how long does the exchange accept the deposit of coins with this key * @param stamp_expire_legal how long does the exchange preserve information for legal disputes with this key * @param coin_value what is the value of coins signed with this key * @param fee_withdraw what withdraw fee does the exchange charge for this denomination * @param fee_deposit what deposit fee does the exchange charge for this denomination * @param fee_refresh what refresh fee does the exchange charge for this denomination * @param fee_refund what refund fee does the exchange charge for this denomination * @param auditor_pub public key to verify against * @param auditor_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ enum GNUNET_GenericReturnValue TALER_auditor_denom_validity_verify ( const char *auditor_url, const struct TALER_DenominationHash *h_denom_pub, const struct TALER_MasterPublicKeyP *master_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_AuditorPublicKeyP *auditor_pub, const struct TALER_AuditorSignatureP *auditor_sig); /* **************** /wire account offline signing **************** */ /** * Create wire fee signature. * * @param payment_method the payment method * @param start_time when do the fees start to apply * @param end_time when do the fees start to apply * @param wire_fee the wire fee * @param closing_fee the closing fee * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ 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); /** * Verify wire fee signature. * * @param payment_method the payment method * @param start_time when do the fees start to apply * @param end_time when do the fees start to apply * @param wire_fee the wire fee * @param closing_fee the closing fee * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Create wire account addition signature. * * @param payto_uri bank account * @param now timestamp to use for the signature (rounded) * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ 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); /** * Verify wire account addition signature. * * @param payto_uri bank account * @param sign_time timestamp when signature was created * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Create wire account removal signature. * * @param payto_uri bank account * @param now timestamp to use for the signature (rounded) * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ 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); /** * Verify wire account deletion signature. * * @param payto_uri bank account * @param sign_time timestamp when signature was created * @param master_pub public key to verify against * @param master_sig the signature the signature * @return #GNUNET_OK if the signature is valid */ 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); /** * Check the signature in @a master_sig. * * @param payto_uri URI that is signed * @param master_pub master public key of the exchange * @param master_sig signature of the exchange * @return #GNUNET_OK if signature is valid */ enum GNUNET_GenericReturnValue TALER_exchange_wire_signature_check ( const char *payto_uri, const struct TALER_MasterPublicKeyP *master_pub, const struct TALER_MasterSignatureP *master_sig); /** * Create a signed wire statement for the given account. * * @param payto_uri account specification * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ void TALER_exchange_wire_signature_make ( const char *payto_uri, const struct TALER_MasterPrivateKeyP *master_priv, struct TALER_MasterSignatureP *master_sig); /** * Compute the hash of the given wire details. The resulting * @a hc is what will be put into the contract between customer * and merchant for signing by both parties. * * @param payto_uri bank account * @param salt salt used to eliminate brute-force inversion * @param[out] hc set to the hash */ void TALER_merchant_wire_signature_hash (const char *payto_uri, const struct TALER_WireSalt *salt, struct TALER_MerchantWireHash *hc); /** * Check the signature in @a wire_s. * * @param payto_uri URL that is signed * @param salt the salt used to salt the @a payto_uri when hashing * @param merch_pub public key of the merchant * @param merch_sig signature of the merchant * @return #GNUNET_OK if signature is valid */ enum GNUNET_GenericReturnValue TALER_merchant_wire_signature_check ( const char *payto_uri, const struct TALER_WireSalt *salt, const struct TALER_MerchantPublicKeyP *merch_pub, const struct TALER_MerchantSignatureP *merch_sig); /** * Create a signed wire statement for the given account. * * @param payto_uri account specification * @param salt the salt used to salt the @a payto_uri when hashing * @param merch_priv private key to sign with * @param[out] merch_sig where to write the signature */ void TALER_merchant_wire_signature_make ( const char *payto_uri, const struct TALER_WireSalt *salt, const struct TALER_MerchantPrivateKeyP *merch_priv, struct TALER_MerchantSignatureP *merch_sig); /* **************** /management/extensions offline signing **************** */ /** * Create a signature for the hash of the configuration of an extension * * @param h_config hash of the JSON object representing the configuration * @param master_priv private key to sign with * @param[out] master_sig where to write the signature */ void TALER_exchange_offline_extension_config_hash_sign ( const struct TALER_ExtensionConfigHash *h_config, const struct TALER_MasterPrivateKeyP *master_priv, struct TALER_MasterSignatureP *master_sig); /** * Verify the signature in @a master_sig of the given hash, taken over the JSON * blob representing the configuration of an extension * * @param h_config hash of the JSON blob of a configuration of an extension * @param master_pub master public key of the exchange * @param master_sig signature of the exchange * @return #GNUNET_OK if signature is valid */ enum GNUNET_GenericReturnValue TALER_exchange_offline_extension_config_hash_verify ( const struct TALER_ExtensionConfigHash *h_config, const struct TALER_MasterPublicKeyP *master_pub, const struct TALER_MasterSignatureP *master_sig ); #endif