diff -r 000000000000 -r 307788aac0a8 rtp/srtpstack/inc/srtpkeyderivation_aescm128.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtp/srtpstack/inc/srtpkeyderivation_aescm128.h	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,81 @@
+/*
+* Copyright (c) 2004 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:    Provides class for AES CM 128 bit key derivation
+*
+*/
+
+
+
+
+#ifndef __SRTP_KEYDERIVATION_AESCM128_H__
+#define __SRTP_KEYDERIVATION_AESCM128_H__
+
+#include "msrtpkeyderivation.h"
+
+//FORWARD declarations
+class CSrtpAESCTRCrypto;
+
+class CSRTPKeyDerivation_AESCM128 : public CBase, public MSRTPKeyDerivation
+    {
+    public:
+        /**
+        * Constructor.
+        * @leave KErrNone if success, system-wide error code otherwise
+        */
+	    static CSRTPKeyDerivation_AESCM128* NewL();
+
+        /**
+        * Constructor.
+        * @leave KErrNone if success, system-wide error code otherwise
+        */
+	    static CSRTPKeyDerivation_AESCM128* NewLC();
+
+        /**
+        * Destructor.
+        */
+	    ~CSRTPKeyDerivation_AESCM128();
+
+        /**
+        * This function is called by SRTP for key derivation operation (PRF_n)
+        * with the default algorithm AESCM-128
+        * Produces keystream based on input key and IV value.
+        * PRF_n function is used to derive session key from desired master key.
+        * @param aBitLength  bit length of the key.
+        * @param aKey  Input key.
+        * @param aIV  Integer Value (IV).
+	    * Returns HBufC8* keystream 
+        */
+        HBufC8* PRF_128BitL(TUint aBitLength, 
+                         const TDesC8& aKey, 
+                         const TDesC8& aIV);
+                                
+                                
+    private:         // Data        
+	    CSrtpAESCTRCrypto* iEncryptor;	    
+                 
+    private:         // methods
+        /**
+        * Default constructor.
+        */
+        CSRTPKeyDerivation_AESCM128();  
+                
+        void ConstructL();  
+    };
+
+#endif // __SRTP_KEYDERIVATION_AESCM128_H__
+
+
+    
+
+