From 64e64141962fbea4e8acea87f57f98e93360a7c4 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 19 Dec 2021 12:24:14 +0100
Subject: introduce new data type for the post-orders hash used for idempotency
 checks, as well as the hash and salt for authentication checks

---
 src/include/taler_merchantdb_plugin.h | 52 ++++++++++++++++++++++++++++++++---
 1 file changed, 48 insertions(+), 4 deletions(-)

(limited to 'src/include')

diff --git a/src/include/taler_merchantdb_plugin.h b/src/include/taler_merchantdb_plugin.h
index b4dc17b2..d301eeef 100644
--- a/src/include/taler_merchantdb_plugin.h
+++ b/src/include/taler_merchantdb_plugin.h
@@ -33,6 +33,50 @@
 struct TALER_MERCHANTDB_Plugin;
 
 
+GNUNET_NETWORK_STRUCT_BEGIN
+
+
+/**
+ * @brief Hash over an order request, used for the idempotency check.
+ */
+struct TALER_MerchantPostDataHashP
+{
+  /**
+   * The authentication hash is a SHA-512 hash code.
+   */
+  struct GNUNET_HashCode hash;
+};
+
+
+/**
+ * @brief Hash used for client authenticiation. Computed with a
+ * `struct TALER_MerchantAuthenticationSaltP`.
+ */
+struct TALER_MerchantAuthenticationHashP
+{
+  /**
+   * The authentication hash is a SHA-512 hash code.
+   * All zeros if authentication is off.
+   */
+  struct GNUNET_HashCode hash;
+};
+
+
+/**
+ * @brief Salt used for client authenticiation.
+ */
+struct TALER_MerchantAuthenticationSaltP
+{
+  /**
+   * The authentication salt is a 256-bit value.
+   */
+  uint32_t salt[256 / 8 / sizeof(uint32_t)];  /* = 8 */
+};
+
+
+GNUNET_NETWORK_STRUCT_END
+
+
 /**
  * Details about a wire account of the merchant.
  */
@@ -68,13 +112,13 @@ struct TALER_MERCHANTDB_InstanceAuthSettings
   /**
    * Hash used for authentication.  All zero if authentication is off.
    */
-  struct GNUNET_HashCode auth_hash;
+  struct TALER_MerchantAuthenticationHashP auth_hash;
 
   /**
    * Salt used to hash the "Authentication" header, the result must then
    * match the @e auth_hash.
    */
-  struct GNUNET_ShortHashCode auth_salt;
+  struct TALER_MerchantAuthenticationSaltP auth_salt;
 };
 
 /**
@@ -1184,7 +1228,7 @@ struct TALER_MERCHANTDB_Plugin
                   const char *instance_id,
                   const char *order_id,
                   struct TALER_ClaimTokenP *claim_token,
-                  struct GNUNET_HashCode *h_post_data,
+                  struct TALER_MerchantPostDataHashP *h_post_data,
                   json_t **contract_terms);
 
 
@@ -1240,7 +1284,7 @@ struct TALER_MERCHANTDB_Plugin
   (*insert_order)(void *cls,
                   const char *instance_id,
                   const char *order_id,
-                  const struct GNUNET_HashCode *h_post_data,
+                  const struct TALER_MerchantPostDataHashP *h_post_data,
                   struct GNUNET_TIME_Timestamp pay_deadline,
                   const struct TALER_ClaimTokenP *claim_token,
                   const json_t *contract_terms);
-- 
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