diff -r 000000000000 -r 307788aac0a8 rtp/srtpstack/inc/srtpauthentication_hmac_sha1.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtp/srtpstack/inc/srtpauthentication_hmac_sha1.h	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,71 @@
+/*
+* 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 authentication with HMAC-SHA1 algorithm.
+*
+*/
+
+
+
+
+#ifndef __SRTP_AUTHENTICATION_HMAC_SHA1_H__
+#define __SRTP_AUTHENTICATION_HMAC_SHA1_H__
+
+#include "msrtpauthentication.h"
+
+class CSRTPAuthentication_HMAC_SHA1 : public CBase, public MSRTPAuthentication
+    {
+    public:
+        /**
+        * Constructor.
+        * @leave KErrNone if success, system-wide error code otherwise
+        */
+	    static CSRTPAuthentication_HMAC_SHA1* NewL();
+
+        /**
+        * Constructor.
+        * @leave KErrNone if success, system-wide error code otherwise
+        */
+	    static CSRTPAuthentication_HMAC_SHA1* NewLC();
+    
+        /**
+        * Destructor.
+        */
+	    ~CSRTPAuthentication_HMAC_SHA1();
+
+        /**
+        * This function is called by SRTP for authentication/integrity protection
+        * with the default algorith, HMAC-SHA1.
+        * Produces authentication tag based on input key and data M.
+        * result IS truncated to n_tag leftmost bits
+        * @param aBitLength  authentication tag length
+        * @param aKey  authentication key (n_a)
+        * @param aAuthPortion data to be integrity protected 
+	    * Returns HBufC8* authentication tag (n_tag truncated) 
+        */
+        HBufC8* AuthenticateL(TUint aBitLength,
+                            const TDesC8& aKey, 
+                            const TDesC8& aAuthPortion,
+                            const TDesC8& aRoc);
+                 
+    private:         // methods
+        /**
+        * Default constructor.
+        */
+        CSRTPAuthentication_HMAC_SHA1();  
+                
+        void ConstructL();          
+    };
+
+#endif // __SRTP_AUTHENTICATION_HMAC_SHA1_H__
+