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’.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/include/taler_crypto_lib.h b/src/include/taler_crypto_lib.h
index 1e4a278c1..2cf4c8f4b 100644
--- a/src/include/taler_crypto_lib.h
+++ b/src/include/taler_crypto_lib.h
@@ -3370,6 +3370,46 @@ TALER_merchant_refund_verify (
   const struct TALER_MerchantSignatureP *merchant_sig);
 
 
+/* ********************* exchange deposit signing ************************* */
+
+/**
+ * Sign a deposit.
+ *
+ * @param h_contract_terms hash of contract terms
+ * @param h_wire hash of the merchant account details
+ * @param coin_pub coin to be deposited
+ * @param merchant_pub merchant public key
+ * @param merchant_priv private key to sign with
+ * @param[out] merchant_sig where to write the signature
+ */
+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);
+
+/**
+ * Verify a deposit.
+ *
+ * @param merchant merchant public key
+ * @param public key of the deposited coin
+ * @param h_contract_terms hash of contract terms
+ * @param h_wire hash of the merchant account details
+ * @param merchant_sig signature of the merchant
+ * @return #GNUNET_OK if the signature is valid
+ */
+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);
+
+
 /* ********************* exchange online signing ************************** */