--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoservices/certificateandkeymgmt/asn1/bitstrdec.cpp	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,79 @@
+/*
+* 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 object implementing the Bitstring ASN1 object.
+* There is no handling for constructed form of Bitstring right now.
+*
+*/
+
+
+#include "asn1dec.h"
+
+EXPORT_C TASN1DecBitString::TASN1DecBitString(void)
+	{
+	}
+
+EXPORT_C HBufC8* TASN1DecBitString::DecodeDERL(const TDesC8& /*aSource*/,TInt& /*aPos*/)
+	{
+	User::Leave(KErrNotSupported);
+	return NULL;
+	}
+
+EXPORT_C HBufC8* TASN1DecBitString::DecodeDERL(const TASN1DecGeneric& /*aSource*/)
+	{
+	User::Leave(KErrNotSupported);
+	return NULL;
+	}
+
+EXPORT_C HBufC8* TASN1DecBitString::ExtractOctetStringL(const TDesC8& aSource,TInt& aPos)
+	{
+	TASN1DecGeneric gen(aSource.Right(aSource.Length() - aPos));
+	gen.InitL();
+	HBufC8* res = ExtractOctetStringL(gen);
+	aPos+=gen.LengthDER();
+	return res;
+	}
+
+EXPORT_C HBufC8* TASN1DecBitString::ExtractOctetStringL(const TASN1DecGeneric& aSource)
+	{
+	TPtrC8 encoding = aSource.GetContentDER();
+	
+	// Special case. The empty bit string. (No padding length octet)
+	if (encoding.Length() == 0 )
+		{
+		return encoding.AllocL();				
+		}
+	
+	// Length must either be 0 for the empty string or >= 2 because
+	// of the padding length octet.
+	if (encoding.Length() == 1)
+		{
+		User::Leave(KErrArgument);
+		}
+		
+	TUint8 paddingLength = encoding[0];
+	if (paddingLength > 7)
+		{
+		User::Leave(KErrArgument);
+		}
+	TPtrC8 pEncoding = encoding.Right(encoding.Length()-1);
+	HBufC8* octetStr = pEncoding.AllocL();
+	TPtr8 pEncKey = octetStr->Des();
+
+	//stop stupid compiler warning
+	TUint8 mask =(TUint8)(255 << paddingLength);
+	//stop stupid compiler warning
+	pEncKey[pEncKey.Length()-1] = (TUint8) ((pEncKey[pEncKey.Length()-1]) & mask);
+	return octetStr;
+	}