diff options
Diffstat (limited to 'src/util')
-rw-r--r-- | src/util/exchange_signatures.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/util/exchange_signatures.c b/src/util/exchange_signatures.c index d6214ab3e..deacf32e5 100644 --- a/src/util/exchange_signatures.c +++ b/src/util/exchange_signatures.c @@ -26,6 +26,93 @@ GNUNET_NETWORK_STRUCT_BEGIN /** + * @brief Format used to generate the signature on a request to obtain + * the wire transfer identifier associated with a deposit. + */ +struct TALER_DepositTrackPS +{ + /** + * Purpose must be #TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION. + */ + struct GNUNET_CRYPTO_EccSignaturePurpose purpose; + + /** + * Hash over the proposal data of the contract for which this deposit is made. + */ + struct TALER_PrivateContractHashP h_contract_terms GNUNET_PACKED; + + /** + * Hash over the wiring information of the merchant. + */ + struct TALER_MerchantWireHashP h_wire GNUNET_PACKED; + + /** + * The Merchant's public key. The deposit inquiry request is to be + * signed by the corresponding private key (using EdDSA). + */ + struct TALER_MerchantPublicKeyP merchant; + + /** + * The coin's public key. This is the value that must have been + * signed (blindly) by the Exchange. + */ + struct TALER_CoinSpendPublicKeyP coin_pub; + +}; + +GNUNET_NETWORK_STRUCT_END + + +void +TALER_exchange_deposit_sign ( + const struct TALER_PrivateContractHashP *h_contract_terms, + const struct TALER_MerchantWireHashP *h_wire, + const struct TALER_CoinSpendPublicKeyP *coin_pub, + const struct TALER_MerchantPublicKeyP *merchant_pub, + const struct TALER_MerchantPrivateKeyP *merchant_priv, + struct TALER_MerchantSignatureP *merchant_sig) +{ + struct TALER_DepositTrackPS dtp = { + .purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION), + .purpose.size = htonl (sizeof (dtp)), + .h_contract_terms = *h_contract_terms, + .h_wire = *h_wire, + .merchant = *merchant_pub, + .coin_pub = *coin_pub + }; + GNUNET_CRYPTO_eddsa_sign (&merchant_priv->eddsa_priv, + &dtp, + &merchant_sig->eddsa_sig); +} + +enum GNUNET_GenericReturnValue +TALER_exchange_deposit_verify ( + const struct TALER_MerchantPublicKeyP *merchant, + const struct TALER_CoinSpendPublicKeyP *coin_pub, + const struct TALER_PrivateContractHashP *h_contract_terms, + const struct TALER_MerchantWireHashP *h_wire, + const struct TALER_MerchantSignatureP *merchant_sig) +{ + struct TALER_DepositTrackPS tps = { + .purpose.size = htonl (sizeof (tps)), + .purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION), + .merchant = *merchant, + .coin_pub = *coin_pub, + .h_contract_terms = *h_contract_terms, + .h_wire = *h_wire + }; + + return + GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION, + &tps, + &merchant_sig->eddsa_sig, + &tps.merchant.eddsa_pub); +} + + +GNUNET_NETWORK_STRUCT_BEGIN + +/** * @brief Format used to generate the signature on a confirmation * from the exchange that a deposit request succeeded. */ |