--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoservices/certificateandkeymgmt/asn1/base128enc.cpp	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,64 @@
+/*
+* Copyright (c) 2001-2009 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: 
+* Implementation for TASN1EncBase128 class.
+*
+*/
+
+
+#include "base128enc.h"
+
+
+TASN1EncBase128DER::TASN1EncBase128DER(TUint aInt) : iInt(aInt), iLengthDER(0)
+	{
+	CalculateLengthDER();
+	}
+
+
+TUint TASN1EncBase128DER::LengthDER() const
+	{
+	return iLengthDER;
+	}
+
+
+void TASN1EncBase128DER::CalculateLengthDER()
+	{
+	iLengthDER = 1;
+	TUint working = iInt;
+	while (working >>= 7)
+		{
+		++iLengthDER;
+		}
+	}
+
+
+void TASN1EncBase128DER::WriteDERL(TDes8& aBuf, TUint& aPos) const
+	{
+	__ASSERT_DEBUG(aBuf.Length() - aPos >= STATIC_CAST(TUint8, iLengthDER), 
+		User::Leave(KErrBadDescriptor));
+
+	TInt last = aPos + iLengthDER - 1;
+	TUint working = iInt;
+	for (TUint cursor = last; cursor >= aPos; --cursor)
+		{
+		// Cast takes least significant 8 bits only (actually, we only need 7)
+		aBuf[cursor] = STATIC_CAST(TUint8, working);
+		aBuf[cursor] |= 0x80; // Top bit always set to 1...
+		working >>= 7;
+		}
+	// ...except top bit on last byte is 0
+	aBuf[last] &= 0x7F;
+
+	aPos += iLengthDER;
+	}