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1 /* |
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2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: SRTP packet class (SRTP) |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 |
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21 #ifndef __SRTP_PACKET_SRTP_H__ |
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22 #define __SRTP_PACKET_SRTP_H__ |
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23 |
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24 // INCLUDES |
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25 #include <in_sock.h> |
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26 #include "srtppacket.h" |
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27 #include "srtppacketrtp.h" |
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28 |
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29 |
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30 // FORWARD DECLARATIONS |
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31 class CSRTPCryptoHandler; |
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32 /** |
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33 * Contains general SRTP-specific packet routines |
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34 */ |
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35 class CSRTPPacketSRTP : public CSRTPPacketRTP |
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36 { |
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37 public: |
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38 |
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39 /** |
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40 * Constructor. |
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41 * @param aPacket a SRTP packet |
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42 * @param aHandler the cryptohandler for this packet |
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43 * @leave KErrNone if success, system-wide error code otherwise |
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44 */ |
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45 static CSRTPPacketSRTP* NewL(const TDesC8& aPacket, |
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46 CSRTPCryptoHandler& aHandler); |
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47 |
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48 |
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49 /** |
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50 * Get authentication tag |
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51 * @return authentication tag |
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52 */ |
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53 TPtrC8 AuthenticationTag(); |
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54 |
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55 /** |
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56 * Get master key identifier |
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57 * @return TPtrC8 master key identifier |
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58 */ |
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59 TPtrC8 MasterKeyIdentifier(); |
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60 |
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61 /** |
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62 * Allocate size for decrypted packet and copy payload + header |
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63 * @return HBufC8* decrypted packet |
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64 */ |
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65 HBufC8* CreateDecryptedPacketL(TUint8* aDecryptedPayloadPtr); |
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66 |
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67 private: //methods |
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68 |
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69 CSRTPPacketSRTP (const TDesC8& aPacket, |
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70 CSRTPCryptoHandler& aHandler); |
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71 ~CSRTPPacketSRTP(); |
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72 |
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73 void ConstructL(); |
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74 |
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75 /** |
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76 * Update payload length information |
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77 * @return void |
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78 */ |
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79 void UpdatePayloadLengthL(); |
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80 |
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81 /** |
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82 * Update authentication tag |
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83 * @return void |
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84 */ |
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85 void UpdateAuthenticationTagL(); |
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86 |
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87 /** |
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88 * Update master key identifier |
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89 * @return void |
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90 */ |
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91 void UpdateMasterKeyIdentifier(); |
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92 |
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93 /** |
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94 * Count size of the decrypted packet |
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95 * @return TUint size of the decrypted packet |
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96 */ |
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97 TUint CountDecryptedPacketSize(); |
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98 |
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99 |
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100 /* |
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101 * Read Master Key Identifier (MKI) from packet |
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102 * @return TPtrC8 pointer to MKI |
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103 */ |
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104 TPtrC8 GetAuthenticationTagL(); |
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105 |
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106 /* |
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107 * Read Master Key Identifier (MKI) from packet |
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108 * @return TPtrC8 pointer to MKI |
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109 */ |
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110 TPtrC8 GetMasterKeyIdentifier(); |
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111 |
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112 |
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113 private: //data |
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114 TPtrC8 iAuthenticationTag; // auth. tag |
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115 TPtrC8 iMasterKeyIdentifier; // MKI |
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116 |
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117 }; |
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118 |
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119 #endif // __SRTP_PACKET_SRTP_H__ |
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120 |
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121 |