der: don't overwrite errcode

If the code has already been set it is more detailed than the more
generic 'invalid object'.

diff --git a/src/util-decode-der.c b/src/util-decode-der.c
index 2d57d416adfcc4c808a88d8925c28dc5ab6ed572..53fab0edf02ccf3168b4ed1a75ef3e5904d6e550 100644 (file)
--- a/src/util-decode-der.c
+++ b/src/util-decode-der.c
@@ -290,7 +290,8 @@ static Asn1Generic * DecodeAsn1DerGeneric(const unsigned char *buffer,
     };
 
     if (child == NULL) {
-        *errcode = ERR_DER_INVALID_OBJECT;
+        if (*errcode == 0)
+            *errcode = ERR_DER_INVALID_OBJECT;
         return NULL;
     }