--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoservices/certificateandkeymgmt/asn1/nulldec.cpp	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,45 @@
+/*
+* Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+* This file contains the implementation of the ASN1 Null class.
+*
+*/
+
+
+#include "asn1dec.h"
+
+EXPORT_C TASN1DecNull::TASN1DecNull(void)
+	{
+	}
+
+EXPORT_C void TASN1DecNull::DecodeDERL(const TDesC8& aSource,TInt& aPos)
+
+	{
+	TPtrC8 Source=aSource.Mid(aPos);
+	TASN1DecGeneric gen(Source);
+	gen.InitL();
+	aPos+=gen.LengthDER();
+	DecodeDERL(gen);
+	}
+
+EXPORT_C void TASN1DecNull::DecodeDERL(const TASN1DecGeneric& aSource)
+	{
+	TPtrC8 contents(aSource.Encoding());
+	if ((contents.Length() != 2)	||
+		(contents[1] & 0xff)		||
+		(!(contents[0] & 0x05)))
+		{
+		User::Leave(KErrArgument);
+		}
+	}