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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 Master key class. |
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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_MASTER_KEY_H__ |
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22 #define __SRTP_MASTER_KEY_H__ |
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23 |
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24 // INCLUDES |
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25 #include <e32def.h> |
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26 #include <e32des8.h> |
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27 #include <e32base.h> |
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28 #include "srtpdef.h" |
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29 |
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30 |
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31 // STRUCT CLASSES |
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32 |
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33 /** |
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34 * Contains an SRTP master key. |
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35 */ |
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36 class CSRTPMasterKey : public CBase |
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37 { |
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38 public: // constructor |
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39 |
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40 /** |
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41 * Two-phased constructor. |
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42 * CSRTPCryptoContext takes the ownership of MasterKey and MasterSalt |
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43 * @param aKey The master key value. Local copy is made. |
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44 * @param aMKI The master key identifier value. Local copy is made. |
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45 * MKI key is optional so if there is no MKI key then |
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46 * gives empty string "". |
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47 * @param aN_E The bit length of the encryption key |
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48 * @param aN_A The bit length of the authentication key |
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49 * @leave KErrNone if success, system-wide error code otherwise |
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50 */ |
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51 IMPORT_C static CSRTPMasterKey* NewL( const TDesC8& aKey, |
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52 const TDesC8& aMKI, |
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53 TUint aN_E = KSRTPDefSessionEncryptionKeyLength, |
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54 TUint aN_A = KSRTPDefSessionAuthenticationKeyLength ); |
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55 |
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56 /** |
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57 * Two-phased constructor. |
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58 * CSRTPCryptoContext takes the ownership of MasterKey and MasterSalt |
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59 * @param aKey The master key value. Local copy is made. |
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60 * @param aMKI The master key identifier value. Local copy is made. |
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61 * @param aN_E The bit length of the encryption key |
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62 * @param aN_A The bit length of the authentication key |
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63 * @leave KErrNone if success, system-wide error code otherwise |
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64 */ |
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65 IMPORT_C static CSRTPMasterKey* NewLC( const TDesC8& aKey, |
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66 const TDesC8& aMKI, |
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67 TUint aN_E = KSRTPDefSessionEncryptionKeyLength, |
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68 TUint aN_A = KSRTPDefSessionAuthenticationKeyLength ); |
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69 |
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70 /** |
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71 * Destructor |
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72 */ |
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73 ~CSRTPMasterKey(); |
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74 |
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75 /* |
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76 * Gets current master key value |
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77 * @return current master key value |
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78 */ |
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79 IMPORT_C const TDesC8& MasterKey() const; |
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80 |
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81 /* |
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82 * Gets current MKI |
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83 * @return current MKI |
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84 */ |
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85 IMPORT_C const TDesC8& MKI() const; |
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86 |
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87 /* |
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88 * Gets current encryption key length |
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89 * @return encryption key length |
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90 */ |
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91 IMPORT_C TUint EncrKeyLength() const; |
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92 |
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93 /* |
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94 * Gets current authorization key length |
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95 * @return authorization key length |
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96 */ |
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97 IMPORT_C TUint AuthKeyLength() const; |
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98 |
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99 |
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100 /* |
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101 * Check the validity of the whole SRTPMasterKey |
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102 * @return validity of this SRTPMasterKey |
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103 */ |
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104 IMPORT_C TBool Valid() const; |
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105 |
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106 private: //methods |
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107 |
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108 CSRTPMasterKey( TUint aN_E, TUint aN_A ); |
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109 |
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110 void ConstructL ( const TDesC8& aKey, |
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111 const TDesC8& aMKI ); |
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112 |
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113 |
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114 /* assignment operator */ |
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115 const CSRTPMasterKey& operator=(const CSRTPMasterKey& aKey); |
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116 |
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117 private: //data |
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118 |
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119 /** |
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120 * The master key value. |
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121 * The length of the key is determined by the Size() function. |
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122 */ |
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123 HBufC8 *iKey; |
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124 |
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125 /** |
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126 * The master key identifier value |
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127 */ |
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128 HBufC8* iMKI; |
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129 |
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130 /** |
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131 * The bit length of the encryption key |
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132 */ |
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133 TUint iN_E; |
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134 |
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135 /** |
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136 * The bit length of the authentication key |
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137 */ |
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138 TUint iN_A; |
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139 |
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140 friend class CSRTPCryptoContext; |
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141 #ifdef EUNIT_TESTING |
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142 friend class UT_CSRTPMasterKey; |
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143 #endif |
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144 }; |
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145 |
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146 |
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147 #endif // __SRTP_MASTER_KEY_H__ |