--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtp/srtpstack/inc/srtpaesctrcrypto.h	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,76 @@
+/*
+* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "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:    Class for AES (in Counter Mode) encryption operations
+*
+*/
+
+
+
+
+#ifndef __SRTPAESCTRCRYPTO_H__
+#define __SRTPAESCTRCRYPTO_H__
+
+#include <e32base.h>
+
+
+class CSrtpAESCTRCrypto : public CBase
+  	{
+public:
+    /**
+    * Constructor.
+    * @leave KErrNone if success, system-wide error code otherwise
+    */
+	IMPORT_C static CSrtpAESCTRCrypto* NewL();
+		
+	/**
+    * AES CM cipher, produces generic keystream
+    * @param aBitLength  key length.
+    * @param aKey  Input key.
+    * @param aIV  Integer Value (IV).
+	* Returns HBufC8* generated keystream
+	*/
+	IMPORT_C HBufC8* KeystreamL(TUint aBitLength, const TDesC8& aKey, const TDesC8& aIV );
+	
+	/**
+    * AES CM cipher, produces key stream and performs an XOR operation for the text
+    * @param aKey  Input key.
+    * @param aIV  Integer Value (IV).
+    * @param aSrc source data which will be encrypted.
+	* Returns HBufC8* decrypted/encrypted source
+	*/
+	IMPORT_C HBufC8* EncryptL(const TDesC8& aKey, const TDesC8& aIV, const TDesC8& aSrc);
+		
+	/**
+    * Destructor
+	*/
+	~CSrtpAESCTRCrypto();
+private:
+    /**
+    * Default constructor.
+    */
+	CSrtpAESCTRCrypto( );
+		
+	/**
+    * Increases IV's value by one. 
+    * Sets IV's last 32 bits to 0 if their value is max
+    * @param aIV  Integer Value (IV).
+	*/
+	void IncreaseIV(TDes8& iv);
+	
+	#ifdef EUNIT_TESTING
+        friend class UT_CSrtpAESCTRCrypto;
+    #endif     
+	};
+
+#endif // __SrtpAESCTRCrypto_H__
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