1 files changed, 13 insertions, 10 deletions

diff --git a/src/lib/libcrypto/x509v3/v3_utl.c b/src/lib/libcrypto/x509v3/v3_utl.c
index ac171ca940..a4236bbb6d 100644
--- a/src/lib/libcrypto/x509v3/v3_utl.c
+++ b/src/lib/libcrypto/x509v3/v3_utl.c
@@ -1,5 +1,5 @@
 /* v3_utl.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project.
  */
 /* ====================================================================
@@ -736,17 +736,20 @@ static int ipv6_from_asc(unsigned char *v6, const char *in)
 
         /* Format result */
 
-        /* Copy initial part */
-        if (v6stat.zero_pos > 0)
+        if (v6stat.zero_pos >= 0)
+                {
+                /* Copy initial part */
                 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
-        /* Zero middle */
-        if (v6stat.total != 16)
+                /* Zero middle */
                 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
-        /* Copy final part */
-        if (v6stat.total != v6stat.zero_pos)
-                memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
-                        v6stat.tmp + v6stat.zero_pos,
-                        v6stat.total - v6stat.zero_pos);
+                /* Copy final part */
+                if (v6stat.total != v6stat.zero_pos)
+                        memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
+                                v6stat.tmp + v6stat.zero_pos,
+                                v6stat.total - v6stat.zero_pos);
+                }
+        else
+                memcpy(v6, v6stat.tmp, 16);
 
         return 1;
         }