1 /*

     2 * Copyright (c) 2006 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:    Class is used for configuring mcc srtp crypto params

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 #ifndef MMCCSRTPCRYPTOPARAMS_H

    22 #define MMCCSRTPCRYPTOPARAMS_H

    23 

    24 // INCLUDES

    25 #include <e32base.h>

    26 

    27 

    28 // CONSTANTS

    29 // The default bit length of the HMAC-SHA1 authentication tag

    30 const TUint KMccSRTPAuthTagDefaultLength = 80;

    31 

    32 // default SRTP key derivation rate: 0

    33 const TUint16 KMccSRTPDefaultKeyDerivationRate = 0x00;

    34 

    35 // The default length of the SRTP prefix

    36 const TUint KMccSRTPPrefixLength = 0;

    37 

    38 const TInt KMccReplayWindowSize = 64;

    39 

    40 // default SRTP ROC Transmission rate: 1

    41 const TUint16 KMccSRTPDefaultROCTransRate = 0x01;

    42 

    43 // The 80 bit length of the HMAC-SHA1 authentication tag (n_tag)

    44 const TUint KMccSRTPAuthTagLength80 = 80;

    45 

    46 // The 32 bit length of the HMAC-SHA1 authentication tag (n_tag)

    47 // Also recommending in RCCm3 as 4 octects

    48 const TUint KMccSRTPAuthTagLength32 = 32;

    49 

    50 //recommending to use in RCCm1 or RCCm2 as 14 octets

    51 const TUint KMccSRTPAuthTagLength112 = 112;

    52 

    53 /**

    54  * Encyption algorithms.

    55  */

    56 enum TMccSRTPEncAlg

    57     {

    58     ESrtpNullAlg = 0,

    59     ESrtpEncAES_CM

    60     };

    61 

    62 /**

    63  * Authentication algorithms.

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

    65  */

    66 enum TMccSRTPAuthAlg

    67     {

    68     ESrtpAuthNull = 0,

    69     ESrtpAuthHMAC_SHA1,

    70     ESrtpAuthRCCm1,

    71     ESrtpAuthRCCm2,

    72     ESrtpAuthRCCm3

    73     };

    74 

    75 /**

    76  * The TMccSrtpCryptoParams captures the MCC SRTP crypto params

    77  * into one class

    78  *

    79  * @lib N/A

    80  * @since Series 60 3.2

    81  */    

    82 class TMccSrtpCryptoParams

    83 	{

    84 

    85 public:

    86  

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

    88     inline TMccSrtpCryptoParams::TMccSrtpCryptoParams() : 

    89       	iSrtpEncAlg( ESrtpEncAES_CM ), 

    90        	iSrtcpEncAlg( ESrtpEncAES_CM ), 

    91         iSrtpAuthAlg( ESrtpAuthHMAC_SHA1 ), 

    92         iSrtcpAuthAlg(ESrtpAuthHMAC_SHA1 ), 

    93         iSrtpAuthTagLen( KMccSRTPAuthTagDefaultLength ),

    94         iSrtcpAuthTagLen(KMccSRTPAuthTagDefaultLength ),

    95         iSrtpKeyDervRate( KMccSRTPDefaultKeyDerivationRate ),

    96         iSrtcpKeyDervRate( KMccSRTPDefaultKeyDerivationRate ),

    97         iPrefixLen( KMccSRTPPrefixLength ), 

    98         iSrtpReplayProtection( ETrue ), 

    99         iSrtcpReplayProtection( ETrue),

   100         iROCTransRate( KMccSRTPDefaultROCTransRate ), 

   101         iMasterKeysLifeTime ( 0 ),

   102         iReplayWindowSizeHint ( KMccReplayWindowSize ),

   103         iIsRCCm3Sync( EFalse )                 

   104     	{

   105     	};

   106 

   107     TMccSRTPEncAlg iSrtpEncAlg;     //encoding algorithm

   108     TMccSRTPEncAlg iSrtcpEncAlg;                

   109     TMccSRTPAuthAlg iSrtpAuthAlg;   // authentication algorithm

   110     TMccSRTPAuthAlg iSrtcpAuthAlg; 

   111     TUint iSrtpAuthTagLen;

   112     TUint iSrtcpAuthTagLen;             

   113     TUint iSrtpKeyDervRate;         //The key derivation rate

   114     TUint iSrtcpKeyDervRate;    

   115     TUint iPrefixLen;               // prefix length	 must be 0

   116     TBool iSrtpReplayProtection;    // replay protection on/off

   117     TBool iSrtcpReplayProtection;   

   118     TUint16 iROCTransRate;          // Integrity transform parameter

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

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

   121     TBool iIsRCCm3Sync;             // using in RCCm3 only defined in RFC srtp-rcc04 Section 4	

   122 	};

   123 

   124 		

   125 typedef TPckgBuf<TMccSrtpCryptoParams> TMccSrtpCryptoParamsPckg;

   126 

   127 #endif /* MMCCSRTPCRYPTOPARAMS_H */

   128             

   129 // End of File