diff -r 000000000000 -r 307788aac0a8 rtp/srtpstack/src/tsrtpstreamoutstatenormal.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rtp/srtpstack/src/tsrtpstreamoutstatenormal.cpp Tue Feb 02 01:03:15 2010 +0200 @@ -0,0 +1,108 @@ +/* +* 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 "tsrtpstreamoutstatenormal.h" +#include "msrtpstreamoutcontext.h" +#include "msrtpcryptohandlercontext.h" +#include "msrtpcryptohandlercontextrtp.h" +#include "msrtpcryptohandlercontextrtcp.h" +#include "srtputils.h" + +// ---------------------------------------------------------------------------- +// TSRTPStreamOutStateNormal::TSRTPStreamOutStateNormal +// ---------------------------------------------------------------------------- +// +TSRTPStreamOutStateNormal::TSRTPStreamOutStateNormal( + MSRTPStreamOutContext& aStreamContext, + MSRTPCryptoHandlerContextRTP& aCryptoHandlerRTPContext, + MSRTPCryptoHandlerContextRTCP& aCryptoHandlerRTCPContext) + : TSRTPStreamOutStateBase(aStreamContext, + aCryptoHandlerRTPContext, + aCryptoHandlerRTCPContext) + { + } + +// ---------------------------------------------------------------------------- +// TSRTPStreamOutStateNormal::DoProtectRtpL +// ---------------------------------------------------------------------------- +// +HBufC8* TSRTPStreamOutStateNormal::DoProtectRtpL(const TDesC8& aPacket) + { + // first initialize current RTP packet.. + SRTP_DEBUG_DETAIL("TSRTPStreamOutStateNormal::DoProtectRtpL Entry"); + + SRTP_DEBUG_TINT_VALUE( "and packet before encrypted length is", aPacket.Length() ); + + iCryptoHandlerRTPContext.InitializePlainPacketL(aPacket); + + // Step 2 (in RFC 3711, section 3.3): + // count the packet index i + iCryptoHandlerRTPContext.CountSenderPacketIndexL(); + + // derive session keys.. + if (iCryptoHandlerRTPContext.MasterKeysUpdated()) + { + iCryptoHandlerRTPContext.DeriveSessionKeysL(); + } + + // encrypt.. + SRTP_DEBUG_DETAIL( "EncrypL" ); + + HBufC8* protectedPacket = iCryptoHandlerRTPContext.EncryptL(); + + // finally, conditional update of roll-over counter.. + //Should check the next Packet Index and decide if need to be re-key + iCryptoHandlerRTPContext.UpdateROC(); + + + + SRTP_DEBUG_DETAIL( "TSRTPStreamOutStateNormal::DoProtectRtpL Exit"); + + // return encrypted RTP packet + return protectedPacket; + + } + +// ---------------------------------------------------------------------------- +// TSRTPStreamOutStateNormal::DoProtectRtcpL +// ---------------------------------------------------------------------------- +// +HBufC8* TSRTPStreamOutStateNormal::DoProtectRtcpL(const TDesC8& aPacket) + { + // first initialize current RTP packet.. + iCryptoHandlerRTCPContext.InitializePlainPacketL(aPacket); + + // Step 2 (in RFC 3711, section 3.3): + // count the packet index i + iCryptoHandlerRTCPContext.CountSenderPacketIndexL(); + + // derive session keys.. + if (iCryptoHandlerRTCPContext.MasterKeysUpdated()) + { + iCryptoHandlerRTCPContext.DeriveSessionKeysL(); + } + + // encrypt.. + HBufC8* protectedPacket = iCryptoHandlerRTCPContext.EncryptL(); + + //Should check the next Packet Index and decide if need to be re-key + // return encrypted RTP packet + return protectedPacket; + }