--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcryptospi/inc/streamcipher.h	Thu Sep 10 14:01:51 2009 +0300
@@ -0,0 +1,74 @@
+/*
+* Copyright (c) 2002-2009 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: 
+* ** IMPORTANT ** PublishedPartner API's in this file are published to 3rd party developers via the 
+* Symbian website. Changes to these API's should be treated as PublishedAll API changes and the Security TA should be consulted.
+*
+*/
+
+
+/**
+ @file
+ @publishedPartner
+ @released
+*/
+
+#ifndef __STREAMCIPHER_H__
+#define __STREAMCIPHER_H__
+
+#include <msymmetriccipher.h>
+
+/**
+*	Abstract interface class to be implemented by Stream Ciphers.
+*/
+class CStreamCipher : public CSymmetricCipher
+{
+public:	//	From CSymmetricCipher
+	/**	
+	*	Implemented by calling the DoProcess() pure virtual function, 
+	*	to be implemented by subclasses.
+	*
+	*	@param aInput	Input text.
+	*	@param aOutput	Text after processing.
+	*/
+	IMPORT_C virtual void ProcessFinalL(const TDesC8& aInput, TDes8& aOutput);
+
+	/**	
+	*	Implemented by calling the DoProcess() pure virtual function, 
+	*	to be implemented by subclasses.
+	*
+	*	@param aInput	Input text.
+	*	@param aOutput	Text after processing.
+	*/
+	IMPORT_C virtual void Process(const TDesC8& aInput, TDes8& aOutput);	
+
+	/**
+	*	Gets the block size in bytes (always = 1 for stream ciphers).
+	*
+	*	@return	Cipher block size (in bytes).
+	*/
+	IMPORT_C virtual TInt BlockSize(void) const;
+	IMPORT_C virtual TInt MaxOutputLength(TInt aInputLength) const;
+	IMPORT_C virtual TInt MaxFinalOutputLength(TInt aInputLength) const;
+protected:
+	/**	
+	*	DoProcess() pure virtual function, 
+	*	to be implemented by subclasses.
+	*
+	*	@param aData	On input, text to be processed; on return, processed text.
+	*/
+	IMPORT_C virtual void DoProcess(TDes8& aData) = 0;
+};
+
+#endif	//	__STREAMCIPHER_H__