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1 /* |
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2 * Copyright (c) 2001-2006 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 the License "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: EAP and WLAN authentication protocols. |
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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 |
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22 #if !defined(_EAP_AM_CRYPTO_RC4_H_) |
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23 #define _EAP_AM_CRYPTO_RC4_H_ |
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24 |
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25 #include "eap_am_types.h" |
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26 #include "eap_variable_data.h" |
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27 #include "eap_am_export.h" |
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28 #include "eap_am_tools.h" |
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29 |
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30 #undef set_key |
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31 |
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32 //------------------------------------------------------------ |
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33 |
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34 /// The eap_am_crypto_rc4_c class includes the state of |
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35 /// one instance of RC4 algorithm. |
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36 class EAP_EXPORT eap_am_crypto_rc4_c |
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37 { |
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38 |
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39 // - - - - - - - - - - - - - - - - - - - - - - - - |
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40 private: |
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41 // - - - - - - - - - - - - - - - - - - - - - - - - |
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42 |
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43 enum eap_am_crypto_rc4_constant |
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44 { |
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45 eap_am_crypto_rc4_constant_state_size = 256, |
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46 }; |
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47 |
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48 /// This is pointer to the tools class. |
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49 abs_eap_am_tools_c * const m_am_tools; |
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50 |
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51 /// State is stored to this variable. |
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52 u8_t m_state[eap_am_crypto_rc4_constant_state_size]; |
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53 |
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54 /// This is the index i. |
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55 u8_t m_ind_i; |
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56 |
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57 /// This is the index j. |
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58 u8_t m_ind_j; |
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59 |
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60 /// This indicates whether this object was generated successfully. |
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61 bool m_is_valid; |
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62 |
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63 // - - - - - - - - - - - - - - - - - - - - - - - - |
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64 |
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65 /** |
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66 * Function cleanups the state and variables. |
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67 */ |
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68 EAP_FUNC_IMPORT eap_status_e cleanup(); |
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69 |
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70 /** |
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71 * The set_is_invalid() function sets the state of the eap_am_crypto_rc4_c |
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72 * object invalid. |
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73 * The eap_am_crypto_rc4_c object calls this function after it is |
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74 * initialized. |
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75 */ |
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76 EAP_FUNC_IMPORT void set_is_invalid(); |
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77 |
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78 /** |
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79 * The set_is_valid() function sets the state of the eap_am_crypto_rc4_c |
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80 * object valid. |
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81 * The eap_am_crypto_rc4_c object calls this function after it is |
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82 * initialized. |
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83 */ |
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84 EAP_FUNC_IMPORT void set_is_valid(); |
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85 |
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86 /** |
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87 * Function swaps the values. |
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88 */ |
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89 EAP_FUNC_IMPORT inline void swap( |
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90 u8_t * const s_i, |
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91 u8_t * const s_j); |
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92 |
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93 /** |
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94 * Function returns the next random byte. |
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95 */ |
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96 inline u8_t get_random_byte(); |
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97 |
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98 /** |
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99 * Function XORs input data buffer with generated pseudo random data |
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100 * and stores result to output data buffer. |
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101 */ |
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102 inline eap_status_e process_data( |
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103 const void * const p_data_in, |
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104 void * const p_data_out, |
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105 const u32_t data_length); |
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106 |
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107 // - - - - - - - - - - - - - - - - - - - - - - - - |
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108 public: |
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109 // - - - - - - - - - - - - - - - - - - - - - - - - |
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110 |
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111 /** |
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112 * Destructor resets the used internal buffers. |
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113 */ |
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114 EAP_FUNC_IMPORT virtual ~eap_am_crypto_rc4_c(); |
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115 |
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116 /** |
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117 * Constructor initializes the used internal buffers. |
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118 */ |
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119 EAP_FUNC_IMPORT eap_am_crypto_rc4_c(abs_eap_am_tools_c * const tools); |
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120 |
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121 /** |
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122 * The get_is_valid() function returns the status of the |
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123 * eap_am_crypto_rc4_c object. |
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124 * True indicates the object is allocated successfully. |
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125 */ |
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126 EAP_FUNC_IMPORT bool get_is_valid(); |
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127 |
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128 /** |
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129 * This function sets the RC4 key. |
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130 */ |
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131 EAP_FUNC_IMPORT eap_status_e set_key( |
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132 const eap_variable_data_c * const key); |
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133 |
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134 /** |
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135 * This function does RC4 encryption. |
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136 */ |
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137 EAP_FUNC_IMPORT eap_status_e encrypt_data( |
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138 const void * const data_in, |
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139 void * const data_out, |
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140 const u32_t data_length); |
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141 |
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142 /** |
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143 * This function does RC4 decryption. |
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144 */ |
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145 EAP_FUNC_IMPORT eap_status_e decrypt_data( |
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146 const void * const data_in, |
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147 void * const data_out, |
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148 const u32_t data_length); |
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149 }; |
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150 |
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151 #endif //#if !defined(_EAP_AM_CRYPTO_RC4_H_) |
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152 |
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153 //------------------------------------------------------------ |
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154 |
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155 |
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156 |
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157 // End. |