Refactor extensions

- Extensions are now compiled as shared libraries and loaded at runtime
  according to the TALER configuration.

- So far, only age restriction is loaded as extension.

- Groundwork for extension auction_brandt started.

1 files changed, 12 insertions, 4 deletions

diff --git a/src/lib/exchange_api_handle.c b/src/lib/exchange_api_handle.c
index 707e5cf5..add37a80 100644
--- a/src/lib/exchange_api_handle.c
+++ b/src/lib/exchange_api_handle.c
@@ -902,16 +902,19 @@ decode_keys_json (const json_t *resp_obj,
   {
     struct TALER_MasterSignatureP extensions_sig = {0};
     json_t *extensions = NULL;
+    bool no_extensions = false;
+    bool no_signature = false;
+
     struct GNUNET_JSON_Specification ext_spec[] = {
       GNUNET_JSON_spec_mark_optional (
         GNUNET_JSON_spec_json ("extensions",
                                &extensions),
-        NULL),
+        &no_extensions),
       GNUNET_JSON_spec_mark_optional (
         GNUNET_JSON_spec_fixed_auto (
           "extensions_sig",
           &extensions_sig),
-        NULL),
+        &no_signature),
       GNUNET_JSON_spec_end ()
     };
 
@@ -921,7 +924,12 @@ decode_keys_json (const json_t *resp_obj,
                                ext_spec,
                                NULL, NULL));
 
-    if (NULL != extensions)
+
+    if (! no_extensions && no_signature)
+      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                  "found extensions without signature\n");
+
+    if (! no_extensions && ! no_signature)
     {
       /* 2. We have an extensions object. Verify its signature. */
       EXITIF (GNUNET_OK !=
@@ -936,7 +944,7 @@ decode_keys_json (const json_t *resp_obj,
     }
 
     /* 4. assuming we might have now a new value for age_mask, set it in key_data */
-    key_data->age_mask = TALER_extensions_age_restriction_ageMask ();
+    key_data->age_mask = TALER_extensions_get_age_restriction_mask ();
   }
 
   /**