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author | Thien-Thi Nguyen <ttn@gnuvola.org> | 2022-04-21 06:16:33 -0400 |
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committer | Thien-Thi Nguyen <ttn@gnuvola.org> | 2022-04-22 20:29:45 -0400 |
commit | a72337a5f39b4e826055974fbc5a3261759ebbec (patch) | |
tree | e5baa6f43098d50cd2508ad719df5a5cb9db818d /src/util | |
parent | e40a16aa8ea1b5f7257b0bf04d7413c2ad77d3d3 (diff) | |
download | exchange-a72337a5f39b4e826055974fbc5a3261759ebbec.tar.xz |
Add abstractions: TALER_exchange_deposit_{sign,verify}
This change also removes ‘struct TALER_DepositTrackPS’
from the public API.
* src/include/taler_signatures.h (struct TALER_DepositTrackPS): Delete.
* src/util/exchange_signatures.c (struct TALER_DepositTrackPS): New.
(TALER_exchange_deposit_sign): New func.
(TALER_exchange_deposit_verify): New func.
* src/include/taler_crypto_lib.h
(TALER_exchange_deposit_sign): New func decl.
(TALER_exchange_deposit_verify): New func decl.
* src/exchange/taler-exchange-httpd_deposits_get.c
(TEH_handler_deposits_get): Rework to use ‘TALER_exchange_deposit_verify’.
* src/lib/exchange_api_deposits_get.c
(TALER_EXCHANGE_deposits_get): Rework to use ‘taler_exchange_deposit_sign’.
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. */ |