From b8064f4099997a9e2179f3ad4ace605f5ccac3a1 Mon Sep 17 00:00:00 2001
From: Rene Mayrhofer <rene@mayrhofer.eu.org>
Date: Mon, 9 Aug 2010 08:09:54 +0000
Subject: [svn-upgrade] new version strongswan (4.4.1)

---
 src/libstrongswan/asn1/asn1.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'src/libstrongswan/asn1')

diff --git a/src/libstrongswan/asn1/asn1.c b/src/libstrongswan/asn1/asn1.c
index 6264bdc54..6f549d42d 100644
--- a/src/libstrongswan/asn1/asn1.c
+++ b/src/libstrongswan/asn1/asn1.c
@@ -497,8 +497,14 @@ int asn1_parse_algorithmIdentifier(chunk_t blob, int level0, chunk_t *parameters
 bool is_asn1(chunk_t blob)
 {
 	u_int len;
-	u_char tag = *blob.ptr;
+	u_char tag;
 
+	if (!blob.len || !blob.ptr)
+	{
+		return FALSE;
+	}
+
+	tag = *blob.ptr;
 	if (tag != ASN1_SEQUENCE && tag != ASN1_SET && tag != ASN1_OCTET_STRING)
 	{
 		DBG2(DBG_LIB, "  file content is not binary ASN.1");
-- 
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