From ab1fc20a450d57db3d76f04ab6176ee1ff0e59b1 Mon Sep 17 00:00:00 2001
From: MS <ms@taler.net>
Date: Wed, 10 Jun 2020 16:15:48 +0200
Subject: avoid assert() upon malformed IBANs

---
 src/json/json_wire.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/json/json_wire.c b/src/json/json_wire.c
index 1cd3fd7d5..fc3d67a81 100644
--- a/src/json/json_wire.c
+++ b/src/json/json_wire.c
@@ -281,7 +281,15 @@ validate_iban (const char *iban)
     j++;
   }
   for (j = 0; '\0' != nbuf[j]; j++)
-    GNUNET_assert (isdigit ( (unsigned char) nbuf[j]));
+  {
+    if (! isdigit ( (unsigned char) nbuf[j]))
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                  "IBAN `%s' didn't convert to numeric format\n",
+                  iban);
+      return GNUNET_NO;
+    }
+  }
   GNUNET_assert (sizeof(dividend) >= 8);
   remainder = 0;
   for (unsigned int i = 0; i<j; i += 16)
-- 
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