From cefb396a77824622f815544ec58e500808582c07 Mon Sep 17 00:00:00 2001
From: Paul Bakker <p.j.bakker@polarssl.org>
Date: Wed, 27 Jun 2012 11:51:09 +0000
Subject: [PATCH]  - Handle empty certificate subject names

---
 ChangeLog           | 1 +
 library/x509parse.c | 8 +++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 4fbd4b664..993bbea19 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -39,6 +39,7 @@ Bugfix
      #52)
    * Handle encryption with private key and decryption with public key as per
    	 RFC 2313
+   * Handle empty certificate subject names
 
 Security
    * Fixed potential memory corruption on miscrafted client messages (found by
diff --git a/library/x509parse.c b/library/x509parse.c
index 883ea251e..a43c6d4e3 100644
--- a/library/x509parse.c
+++ b/library/x509parse.c
@@ -1263,7 +1263,7 @@ int x509parse_crt_der( x509_cert *crt, const unsigned char *buf, size_t buflen )
         return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT + ret );
     }
 
-    if( ( ret = x509_get_name( &p, p + len, &crt->subject ) ) != 0 )
+    if( len && ( ret = x509_get_name( &p, p + len, &crt->subject ) ) != 0 )
     {
         x509_free( crt );
         return( ret );
@@ -2518,6 +2518,12 @@ int x509parse_dn_gets( char *buf, size_t size, const x509_name *dn )
 
     while( name != NULL )
     {
+        if( !name->oid.p )
+        {
+            name = name->next;
+            continue;
+        }
+
         if( name != dn )
         {
             ret = snprintf( p, n, ", " );