1 /*

     2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:    Contains a default cryptographic context for SRTP/SRTCP streams.

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 #ifndef __SRTP_CRYPTOPARAMS_H__

    22 #define __SRTP_CRYPTOPARAMS_H__

    23 

    24 #include <e32base.h>

    25 #include "srtpcryptocontext.h"

    26 

    27 /**

    28 *  SRTP/SRTCP crypto context param 

    29 *  RFC 3711, 4568

    30 *

    31 *  @lib srtp.dll

    32 */

    33 

    34 /**

    35 * Encyption algorithms.

    36 */

    37 enum TSRTPEncAlg

    38     {

    39     ENullAlg = 0,

    40     EEncAES_CM

    41     };

    42 

    43 /**

    44 * Authentication algorithms.

    45 * With RCCm1, RCCm2 and RCCm3, ROC will be synchronized if SEQ%R==0

    46 */

    47 enum TSRTPAuthAlg

    48     {

    49     EAuthNull = 0,

    50     EAuthHMAC_SHA1,

    51     EAuthRCCm1,

    52     EAuthRCCm2,

    53     EAuthRCCm3

    54     };

    55     

    56 

    57 class TSrtpCryptoParams

    58 	{

    59 	public: 

    60 	TSrtpCryptoParams();

    61 	

    62 	TSRTPEncAlg iSrtpEncAlg; 

    63 	TSRTPEncAlg iSrtcpEncAlg;                

    64 	TSRTPAuthAlg iSrtpAuthAlg; 

    65 	TSRTPAuthAlg iSrtcpAuthAlg; 

    66 	TUint iSrtpAuthTagLen;

    67 	TUint iSrtcpAuthTagLen;             

    68 	TUint iSrtpKeyDervRate; //The key derivation rate

    69 	TUint iSrtcpKeyDervRate;    

    70 	TUint iPrefixLen;   

    71 	TBool iSrtpReplayProtection;

    72 	TBool iSrtcpReplayProtection;   

    73 	TUint16 iROCTransRate;   

    74 	TUint64 iMasterKeysLifeTime; //Set both for SRTP/SRTCP otherwise use default

    75 	TInt iReplayWindowSizeHint; //Set both for SRTP/SRTCP otherwise use default

    76 	TBool iIsRCCm3Sync;

    77 

    78 	};

    79 

    80 //IF any of the following param changes it will cause the caculation changes.

    81 inline TSrtpCryptoParams::TSrtpCryptoParams() : 

    82 	  	iSrtpEncAlg( EEncAES_CM ), //encoding algorithm

    83        	iSrtcpEncAlg( EEncAES_CM ), 

    84         iSrtpAuthAlg( EAuthHMAC_SHA1 ), // authentication algorithm

    85         iSrtcpAuthAlg(EAuthHMAC_SHA1 ), 

    86         iSrtpAuthTagLen(KSRTPAuthTagDefaultLength),

    87         iSrtcpAuthTagLen(KSRTPAuthTagDefaultLength),

    88         iSrtpKeyDervRate( KSRTPDefaultKeyDerivationRate ),

    89         iSrtcpKeyDervRate( KSRTPDefaultKeyDerivationRate ),

    90         iPrefixLen( KSRTPPrefixLength ), // prefix length	 must be 0

    91         iSrtpReplayProtection( ETrue ), // replay protection on/off

    92         iSrtcpReplayProtection( ETrue),

    93         iROCTransRate(KSRTPDefaultROCTransRate), // Integrity transform parameter

    94         iMasterKeysLifeTime (0),

    95         iReplayWindowSizeHint (KReplayWindowSize),

    96         iIsRCCm3Sync(EFalse) // using in RCCm3 only defined in RFC srtp-rcc04 Section 4	

    97                   

    98 	{

    99 	};       

   100 

   101 

   102 	

   103 #endif // __SRTP_CRYPTOPARAMS_H__