--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtp/srtpstack/src/tsrtpstreaminstatelatebind.cpp	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,153 @@
+/*
+* 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:    implementation
+*
+*/
+
+
+
+#include "tsrtpstreaminstatelatebind.h"
+#include "msrtpstreamincontext.h"
+#include "msrtpcryptohandlercontext.h"
+#include "msrtpcryptohandlercontextrtp.h"
+#include "msrtpcryptohandlercontextrtcp.h"
+#include "srtputils.h"
+
+// ----------------------------------------------------------------------------
+// TSRTPStreamInStateLateBind::TSRTPStreamInStateLateBind
+// ----------------------------------------------------------------------------
+//
+TSRTPStreamInStateLateBind::TSRTPStreamInStateLateBind(
+    MSRTPStreamInContext& aStreamContext,
+    MSRTPCryptoHandlerContextRTP& aCryptoHandlerRTPContext,
+    MSRTPCryptoHandlerContextRTCP& aCryptoHandlerRTCPContext)
+    : TSRTPStreamInStateBase(aStreamContext,
+                            aCryptoHandlerRTPContext, 
+                            aCryptoHandlerRTCPContext)
+    {
+    }
+
+// ----------------------------------------------------------------------------
+// TSRTPStreamInStateLateBind::DoUnprotectSrtpL
+// ----------------------------------------------------------------------------
+//		
+HBufC8* TSRTPStreamInStateLateBind::DoUnprotectSrtpL(const TDesC8& aPacket)
+    {
+    SRTP_DEBUG_DETAIL( "TSRTPStreamInStateLateBind::DoUnprotectSrtpL ENTRY");
+   	SRTP_DEBUG_TINT_VALUE( "Encrypted PacketLength is", aPacket.Length() );                 
+             
+    // first initialize current encrypted RTP packet..
+    iCryptoHandlerRTPContext.InitializeEncryptedPacketL(aPacket);    
+    
+    
+    // for the first RTP packet, we need to set 
+    // receiver s_l value to current sequence number, see RFC
+    iCryptoHandlerRTPContext.SetReceiver_s_l();
+       
+    // Step 2 (in RFC 3711, section 3.3):
+    // count the packet index i
+    iCryptoHandlerRTPContext.CountReceiverPacketIndexL();
+    
+  	SRTP_DEBUG_DETAIL( "CheckMasterKeyIdentifier" );
+    
+    // check MKI if it is used
+    iCryptoHandlerRTPContext.CheckMasterKeyIdentifierL();
+   	
+   	SRTP_DEBUG_DETAIL( "DeriveSessionKeysL" );
+                  
+    // derive session keys..
+    iCryptoHandlerRTPContext.DeriveSessionKeysL();
+
+    // do the replay protection, based on sender packetIndex 
+    //note that in RCC mode, it set packet index as sender one
+    iCryptoHandlerRTPContext.ReplayProtectionL();
+    
+    SRTP_DEBUG_DETAIL( "AuthenticateL" );
+      
+    // do the authentication (integrity check)
+    iCryptoHandlerRTPContext.AuthenticateL();
+               
+    /*
+    if "error in authentication"
+        "clear Crypto Handler"
+        go to the uninitialized state
+    iStreamContext.ChangeRTPState(MSRTPStreamInContext::ESRTPStreamInUninitialized);    
+    */
+  	SRTP_DEBUG_DETAIL( "DecryptL" );
+                    
+     // step 6 decrypt..
+    HBufC8* decryptedPacket = iCryptoHandlerRTPContext.DecryptL();
+     
+    // Step 7, conditional update s_l and ROC values..
+    // (in RFC 3711, section 3.3):         
+    iCryptoHandlerRTPContext.Update_s_l_and_RocL();
+    iCryptoHandlerRTPContext.AddReplayIndex(); 
+ 
+
+    // first RTP packet successfully decrypted..
+    // session keys derived etc..
+    // we can go to normal state
+    SRTP_DEBUG_DETAIL( "ChangeStreamIn State to Normal" );
+           
+    
+    iStreamContext.ChangeRTPState(MSRTPStreamInContext::ESRTPStreamInNormal);
+    
+    SRTP_DEBUG_TINT_VALUE( "the decrypted packet Length is", decryptedPacket->Length());            
+        
+    SRTP_DEBUG_DETAIL( "TSRTPStreamInStateLateBind::DoUnprotectSrtpL EXIT");
+   	
+    // return decrypted RTP packet
+    return decryptedPacket;    
+    
+    }
+
+// ----------------------------------------------------------------------------
+// TSRTPStreamInStateLateBind::DoUnprotectSrtcpL
+// ----------------------------------------------------------------------------
+//		
+HBufC8* TSRTPStreamInStateLateBind::DoUnprotectSrtcpL(const TDesC8& aPacket)
+    {
+     // first initialize current encrypted RTP packet..
+    iCryptoHandlerRTCPContext.InitializeEncryptedPacketL(aPacket);    
+    
+    
+    //(in RFC 3711, section 3.4):
+    // count the packet index i
+    iCryptoHandlerRTCPContext.ReceiverPacketIndexL();
+     
+    // check MKI if it is used
+    iCryptoHandlerRTCPContext.CheckMasterKeyIdentifierL();
+     
+    // derive session keys..
+    iCryptoHandlerRTCPContext.DeriveSessionKeysL();
+
+    // do the replay protection 
+    iCryptoHandlerRTCPContext.ReplayProtectionL();
+
+    // do the authentication (integrity check)
+    iCryptoHandlerRTCPContext.AuthenticateL();
+               
+     // decrypt..
+    HBufC8* decryptedPacket = iCryptoHandlerRTCPContext.DecryptL();
+     
+    iCryptoHandlerRTCPContext.AddReplayIndex(); 
+    // first RTP packet successfully decrypted..
+    // session keys derived etc..
+    // we can go to normal state
+    iStreamContext.ChangeRTCPState(MSRTPStreamInContext::ESRTPStreamInNormal);
+    
+    
+    // return decrypted RTP packet
+    return decryptedPacket;    
+    }