From a7ad5a07e2eb80d942fcfd49a41330146ec36e45 Mon Sep 17 00:00:00 2001 From: Thien-Thi Nguyen Date: Sun, 17 Apr 2022 04:53:17 -0400 Subject: Add abstractions: TALER_merchant_pay_{sign,verify} MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Additionally, this change removes ‘struct TALER_PaymentResponsePS’ from the public API. * src/include/taler_crypto_lib.h (TALER_merchant_pay_sign): New func decl. (TALER_merchant_pay_verify): New func decl. * src/include/taler_signatures.h (struct TALER_PaymentResponsePS): Delete. * src/util/merchant_signatures.c (struct TALER_PaymentResponsePS): Move here from taler_signatures.h. (TALER_merchant_pay_sign): New func. (TALER_merchant_pay_verify): New func. --- src/util/merchant_signatures.c | 54 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) (limited to 'src/util/merchant_signatures.c') diff --git a/src/util/merchant_signatures.c b/src/util/merchant_signatures.c index 4223b82ba..0a7489f71 100644 --- a/src/util/merchant_signatures.c +++ b/src/util/merchant_signatures.c @@ -175,4 +175,58 @@ TALER_merchant_wire_signature_make ( } +/** + * Used by merchants to return signed responses to /pay requests. + * Currently only used to return 200 OK signed responses. + */ +struct TALER_PaymentResponsePS +{ + /** + * Set to #TALER_SIGNATURE_MERCHANT_PAYMENT_OK. Note that + * unsuccessful payments are usually proven by some exchange's signature. + */ + struct GNUNET_CRYPTO_EccSignaturePurpose purpose; + + /** + * Hash of the proposal data associated with this confirmation + */ + struct TALER_PrivateContractHashP h_contract_terms; +}; + +void +TALER_merchant_pay_sign ( + const struct TALER_PrivateContractHashP *h_contract_terms, + const struct TALER_MerchantPrivateKeyP *merch_priv, + struct GNUNET_CRYPTO_EddsaSignature *merch_sig) +{ + struct TALER_PaymentResponsePS mr = { + .purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_PAYMENT_OK), + .purpose.size = htonl (sizeof (mr)), + .h_contract_terms = *h_contract_terms + }; + + GNUNET_CRYPTO_eddsa_sign (&merch_priv->eddsa_priv, + &mr, + merch_sig); +} + +enum GNUNET_GenericReturnValue +TALER_merchant_pay_verify ( + const struct TALER_PrivateContractHashP *h_contract_terms, + const struct TALER_MerchantPublicKeyP *merchant_pub, + const struct TALER_MerchantSignatureP *merchant_sig) +{ + struct TALER_PaymentResponsePS pr = { + .purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_PAYMENT_OK), + .purpose.size = htonl (sizeof (pr)), + .h_contract_terms = *h_contract_terms + }; + + return + GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MERCHANT_PAYMENT_OK, + &pr, + &merchant_sig->eddsa_sig, + &merchant_pub->eddsa_pub); +} + /* end of merchant_signatures.c */ -- cgit v1.2.3