fix /refresh/link response handling

src/mint-lib/mint_api_refresh_link.c

@@ -172,21 +172,67 @@ parse_refresh_link_coin (const struct TALER_MINT_RefreshLinkHandle *rlh,
 static int
 parse_refresh_link_ok (struct TALER_MINT_RefreshLinkHandle *rlh,
                        json_t *json)
+{
+  unsigned int session;
+  unsigned int num_coins;
+  int ret;
+
+  if (! json_is_array (json))
+  {
+    GNUNET_break_op (0);
+    return GNUNET_SYSERR;
+  }
+  num_coins = 0;
+  for (session=0;session<json_array_size (json); session++)
+  {
+    json_t *jsona;
+    struct MAJ_Specification spec[] = {
+      MAJ_spec_json ("new_coins", &jsona),
+      MAJ_spec_end
+    };
+
+    if (GNUNET_OK !=
+	MAJ_parse_json (json_array_get (json, 
+					session),
+			spec))
+    {
+      GNUNET_break_op (0);
+      return GNUNET_SYSERR;
+    }
+    if (! json_is_array (jsona))
+    {
+      GNUNET_break_op (0);
+      MAJ_parse_free (spec);
+      return GNUNET_SYSERR;
+    }
+
+    /* count all coins over all sessions */
+    num_coins += json_array_size (jsona);
+    MAJ_parse_free (spec);
+  }
+  {
+    unsigned int off_coin;
+    unsigned int i;
+    struct TALER_CoinSpendPrivateKeyP coin_privs[num_coins];
+    struct TALER_DenominationSignature sigs[num_coins];
+    struct TALER_DenominationPublicKey pubs[num_coins];
+      
+    off_coin = 0;
+    for (session=0;session<json_array_size (json); session++)
     {
       json_t *jsona;
       struct TALER_TransferPublicKeyP trans_pub;
       struct TALER_EncryptedLinkSecretP secret_enc;
       struct MAJ_Specification spec[] = {
 	MAJ_spec_json ("new_coins", &jsona),
-    MAJ_spec_fixed_auto ("trans_pub", &trans_pub),
+	MAJ_spec_fixed_auto ("transfer_pub", &trans_pub),
 	MAJ_spec_fixed_auto ("secret_enc", &secret_enc),
 	MAJ_spec_end
       };
-  unsigned int num_coins;
-  int ret;
 
       if (GNUNET_OK !=
-      MAJ_parse_json (json,
+	  MAJ_parse_json (json_array_get (json, 
+					  session),
 			  spec))
       {
 	GNUNET_break_op (0);
@@ -200,36 +246,34 @@ parse_refresh_link_ok (struct TALER_MINT_RefreshLinkHandle *rlh,
       }
       
       /* decode all coins */
-  num_coins = json_array_size (json);
+      for (i=0;i<json_array_size (jsona);i++)
-  {
-    unsigned int i;
-    struct TALER_CoinSpendPrivateKeyP coin_privs[num_coins];
-    struct TALER_DenominationSignature sigs[num_coins];
-    struct TALER_DenominationPublicKey pubs[num_coins];
-
-    for (i=0;i<num_coins;i++)
       {
 	if (GNUNET_OK !=
 	    parse_refresh_link_coin (rlh,
-                                   json_array_get (json, i),
+				     json_array_get (jsona, 
+						     i),
 				     &trans_pub,
 				     &secret_enc,
-                                   &coin_privs[i],
+				     &coin_privs[i+off_coin],
-                                   &sigs[i],
+				     &sigs[i+off_coin],
-                                   &pubs[i]))
+				     &pubs[i+off_coin]))
 	{
 	  GNUNET_break_op (0);
 	  break;
 	}
       }
-
       /* check if we really got all, then invoke callback */
-    if (i != num_coins)
+      if (i != json_array_size (jsona))
       {
 	GNUNET_break_op (0);
 	ret = GNUNET_SYSERR;
+	MAJ_parse_free (spec);
+	break;
       }
-    else
+      off_coin += json_array_size (jsona);
+      MAJ_parse_free (spec);
+    }
+    if (off_coin == num_coins)
     {
       rlh->link_cb (rlh->link_cb_cls,
 		    MHD_HTTP_OK,
@@ -241,6 +285,11 @@ parse_refresh_link_ok (struct TALER_MINT_RefreshLinkHandle *rlh,
       rlh->link_cb = NULL;
       ret = GNUNET_OK;
     }
+    else
+    {
+      GNUNET_break_op (0);
+      ret = GNUNET_SYSERR;
+    }
 
     /* clean up */
     for (i=0;i<num_coins;i++)

src/mint-lib/test_mint_api.c

@@ -1009,6 +1009,10 @@ link_cb (void *cls,
       return;
     }
     /* check that the coins match */
+    fprintf (stderr,
+	     "Got %u coins\n",
+	     num_coins);
+    /* FIXME: note: coins might be legitimately permutated in here... */
     for (i=0;i<num_coins;i++)
     {
       const struct FreshCoin *fc;