--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtp/srtpstack/src/srtpauthentication_hmac_sha1.cpp	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,138 @@
+/*
+* 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.
+*
+*/
+
+
+
+
+#include "srtpauthentication_hmac_sha1.h" 
+#include "srtpaesctrcrypto.h"
+#include "hash.h"
+#include "srtpdef.h"
+#include "srtputils.h"
+
+#define DES_AS_8_BIT(str) (TPtrC8((TText8*)((str).Ptr()), (str).Size()))
+    
+// ---------------------------------------------------------------------------
+// CSRTPAuthentication_HMAC_SHA1::NewL
+// ---------------------------------------------------------------------------
+//
+CSRTPAuthentication_HMAC_SHA1* CSRTPAuthentication_HMAC_SHA1::NewL()
+    {
+    CSRTPAuthentication_HMAC_SHA1* self = CSRTPAuthentication_HMAC_SHA1::NewLC();
+    CleanupStack::Pop(self);
+    return self;    
+    }
+
+// ---------------------------------------------------------------------------
+// CSRTPAuthentication_HMAC_SHA1::NewLC
+// ---------------------------------------------------------------------------
+//
+CSRTPAuthentication_HMAC_SHA1* CSRTPAuthentication_HMAC_SHA1::NewLC()
+    {
+    CSRTPAuthentication_HMAC_SHA1* self = new( ELeave ) CSRTPAuthentication_HMAC_SHA1();
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    return self;
+    }
+
+
+// -----------------------------------------------------------------------------
+// SRTPAuthentication_HMAC_SHA1::AuthenticateL
+// -----------------------------------------------------------------------------
+//
+HBufC8* CSRTPAuthentication_HMAC_SHA1::AuthenticateL(TUint aBitLength,
+                                                    const TDesC8& aKey, 
+                                                    const TDesC8& aAuthPortion,
+                                                    const TDesC8& aRoc)
+    {        
+    SRTP_DEBUG_DETAIL( "CSRTPAuthentication_HMAC_SHA1::AuthenticateL Entry" );
+    
+    TBuf8<20> buf;    
+	
+
+    if (aBitLength != KSRTPAuthTagLength80 && aBitLength != KSRTPAuthTagLength32)
+        {
+        SRTP_DEBUG_TUINT_VALUE( "aBitLength is not valid", aBitLength );
+	    
+        User::Leave(KErrArgument);
+        }
+	
+    // reserve size for 160 bit tag which seems to be the default        
+	HBufC8* result = HBufC8::NewL(20);  
+	TPtr8 ptrOutputBuff = result->Des();	
+	
+    CleanupStack::PushL(result);
+
+    CSHA1* sha1 = CSHA1::NewL(); 
+    CleanupStack::PushL(sha1);
+    
+    CHMAC *hmac = CHMAC::NewL(aKey, sha1);        
+    CleanupStack::Pop(sha1);
+    CleanupStack::Pop(result);
+    
+    SRTP_DEBUG_TINT_VALUE( "HMAC INPUT and INPUT Length is ", aAuthPortion.Length() );
+    SRTP_DEBUG_TINT_VALUE( "HMAC INPUT and INPUT Size is ", aAuthPortion.Size());     
+    SRTP_DEBUG_PACKET ( DES_AS_8_BIT(aAuthPortion) );    
+    
+    if(aRoc.Length())
+    	{
+  		hmac->Update(DES_AS_8_BIT(aAuthPortion));
+    	buf.Copy(hmac->Final(DES_AS_8_BIT(aRoc))); 	
+    	}
+    else
+    	{
+    	buf.Copy(hmac->Final(DES_AS_8_BIT(aAuthPortion)));
+    	}
+    *result = buf;    
+    ptrOutputBuff.SetLength(aBitLength/8);
+    
+    delete hmac;
+    
+   	SRTP_DEBUG_DETAIL( "HMAC caculated Authentication tag");
+    SRTP_DEBUG_PACKET( *result );    
+    SRTP_DEBUG_DETAIL( "CSRTPAuthentication_HMAC_SHA1::AuthenticateL Exit" );
+                            
+    return result;            
+    }
+    
+    
+// ---------------------------------------------------------------------------
+// CSRTPAuthentication_HMAC_SHA1::ConstructL
+// ---------------------------------------------------------------------------
+//
+void CSRTPAuthentication_HMAC_SHA1::ConstructL()
+    {    
+    
+    }
+
+// ---------------------------------------------------------------------------
+// CSRTPAuthentication_HMAC_SHA1::~CSRTPAuthentication_HMAC_SHA1
+// ---------------------------------------------------------------------------
+//
+CSRTPAuthentication_HMAC_SHA1::~CSRTPAuthentication_HMAC_SHA1()
+    {    
+    }
+
+// ---------------------------------------------------------------------------
+// CSRTPAuthentication_HMAC_SHA1::CSRTPAuthentication_HMAC_SHA1
+// ---------------------------------------------------------------------------
+//
+CSRTPAuthentication_HMAC_SHA1::CSRTPAuthentication_HMAC_SHA1()
+    {    
+        
+    }
+