From 14d85644020ff2858e60b179f7952f5d37b98bf1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Manuel=20P=C3=A9gouri=C3=A9-Gonnard?= <mpg@elzevir.fr>
Date: Mon, 15 Jul 2013 11:01:14 +0200
Subject: [PATCH] Fix overflow check in oid_get_numeric_string()

(The fix in 791eed3 was wrong.)
---
 library/oid.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/library/oid.c b/library/oid.c
index 366720ec0..750ece8e3 100644
--- a/library/oid.c
+++ b/library/oid.c
@@ -591,8 +591,7 @@ int oid_get_numeric_string( char *buf, size_t size,
     for( i = 1; i < oid->len; i++ )
     {
         /* Prevent overflow in value. */
-        unsigned int v = value << 7;
-        if ( v < value )
+        if ( ( ( value << 7 ) >> 7 ) != value )
             return( POLARSSL_ERR_DEBUG_BUF_TOO_SMALL );
 
         value <<= 7;