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1 /* |
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2 * Copyright (c) 2002-2006 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 "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: Implementation of the ScanInfoIe 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 #include "hssscaninfoie.h" |
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21 |
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22 // Defines the id byte of the RSN Information Element. |
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23 const TUint8 SCANINFOIE_RSNIE_ID = 48; |
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24 |
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25 // Defines the static offsets for different fields in RSN IE. |
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26 const TUint32 SCANINFOIE_RSNIE_GROUP_SUITE_OFFSET = 2; |
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27 const TUint32 SCANINFOIE_RSNIE_PAIRWISE_SUITE_COUNT_OFFSET = 6; |
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28 const TUint32 SCANINFOIE_RSNIE_PAIRWISE_SUITE_OFFSET = 8; |
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29 |
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30 // Defines the OUIs used in RSN IEs. |
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31 const TUint32 SCANINFOIE_OUI_LENGTH = 4; |
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32 const TUint8 SCANINFOIE_RSNIE_OUI_CCMP[] = { 0x00, 0x0F, 0xAC, 0x04 }; |
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33 const TUint8 SCANINFOIE_RSNIE_OUI_EAP[] = { 0x00, 0x0F, 0xAC, 0x01 }; |
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34 const TUint8 SCANINFOIE_RSNIE_OUI_PSK[] = { 0x00, 0x0F, 0xAC, 0x02 }; |
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35 |
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36 // Defines the static offsets for different fields in RSN IE. |
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37 const TUint32 SCANINFOIE_WPAIE_PAIRWISE_SUITE_COUNT_OFFSET = 10; |
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38 const TUint32 SCANINFOIE_WPAIE_PAIRWISE_SUITE_OFFSET = 12; |
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39 |
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40 // Defines the OUIs used in WPA IEs. |
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41 const TUint8 SCANINFOIE_WPAIE_OUI_EAP[] = { 0x00, 0x50, 0xF2, 0x01 }; |
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42 const TUint8 SCANINFOIE_WPAIE_OUI_PSK[] = { 0x00, 0x50, 0xF2, 0x02 }; |
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43 |
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44 // ============================ MEMBER FUNCTIONS =============================== |
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45 |
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46 // ----------------------------------------------------------------------------- |
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47 // ScanInfoIe::ScanInfoIe |
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48 // C++ default constructor can NOT contain any code, that |
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49 // might leave. |
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50 // ----------------------------------------------------------------------------- |
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51 // |
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52 HssScanInfoIe::HssScanInfoIe() |
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53 { |
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54 } |
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55 |
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56 // Destructor |
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57 HssScanInfoIe::~HssScanInfoIe() |
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58 { |
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59 } |
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60 |
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61 // ----------------------------------------------------------------------------- |
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62 // ScanInfoIe::SecurityMode |
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63 // ----------------------------------------------------------------------------- |
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64 // |
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65 HssSecurityMode HssScanInfoIe::SecurityMode( |
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66 HssScanInfo& info ) |
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67 { |
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68 TUint8 wpaie_length( 0 ); |
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69 const TUint8* wpaie_data = NULL; |
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70 TUint8 rsnie_length( 0 ); |
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71 const TUint8* rsnie_data = NULL; |
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72 |
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73 info.InformationElement( SCANINFOIE_RSNIE_ID, rsnie_length, &rsnie_data ); |
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74 info.WpaIE( wpaie_length, &wpaie_data ); |
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75 |
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76 if ( !info.Privacy() ) |
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77 { |
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78 if ( !wpaie_length && !rsnie_length ) |
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79 { |
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80 return HssSecurityModeOpen; |
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81 } |
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82 return HssSecurityMode802_1x; |
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83 } |
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84 |
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85 if ( !wpaie_length && !rsnie_length ) |
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86 { |
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87 return HssSecurityModeWep; |
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88 } |
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89 |
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90 if ( rsnie_length ) |
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91 { |
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92 if ( IsKeyManagement( |
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93 HssScanInfoIeTypeRsn, |
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94 HssScanInfoIeKeyManagementPsk, |
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95 rsnie_length, |
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96 rsnie_data ) ) |
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97 { |
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98 if ( IsWpa2Ciphers( |
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99 HssScanInfoIeTypeRsn, |
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100 rsnie_length, |
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101 rsnie_data ) ) |
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102 { |
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103 return HssSecurityModeWpa2Psk; |
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104 } |
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105 |
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106 return HssSecurityModeWpaPsk; |
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107 } |
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108 else if ( IsKeyManagement( |
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109 HssScanInfoIeTypeRsn, |
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110 HssScanInfoIeKeyManagementEap, |
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111 rsnie_length, |
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112 rsnie_data ) ) |
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113 { |
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114 if ( IsWpa2Ciphers( |
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115 HssScanInfoIeTypeRsn, |
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116 rsnie_length, |
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117 rsnie_data ) ) |
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118 { |
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119 return HssSecurityModeWpa2Eap; |
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120 } |
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121 |
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122 return HssSecurityModeWpaEap; |
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123 } |
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124 } |
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125 |
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126 if ( wpaie_length ) |
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127 { |
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128 if ( IsKeyManagement( |
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129 HssScanInfoIeTypeWpa, |
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130 HssScanInfoIeKeyManagementPsk, |
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131 wpaie_length, |
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132 wpaie_data ) ) |
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133 { |
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134 return HssSecurityModeWpaPsk; |
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135 } |
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136 else if ( IsKeyManagement( |
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137 HssScanInfoIeTypeWpa, |
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138 HssScanInfoIeKeyManagementEap, |
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139 wpaie_length, |
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140 wpaie_data ) ) |
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141 { |
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142 return HssSecurityModeWpaEap; |
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143 } |
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144 } |
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145 |
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146 return HssSecurityMode802_1x; |
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147 } |
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148 |
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149 // ----------------------------------------------------------------------------- |
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150 // ScanInfoIe::Compare |
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151 // ----------------------------------------------------------------------------- |
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152 // |
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153 TInt HssScanInfoIe::Compare( |
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154 const unsigned char* pl, |
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155 int ll, |
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156 const unsigned char* pr, |
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157 int rl ) |
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158 { |
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159 if ( ll != rl ) |
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160 return ll - rl; |
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161 |
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162 if ( pl == pr ) |
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163 return 0; |
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164 |
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165 for ( int i( 0 ); i < ll; ++i ) |
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166 if ( *(pl+i) != *(pr+i) ) |
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167 return *(pl+i) - *(pr+i); |
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168 |
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169 return 0; |
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170 } |
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171 |
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172 // ----------------------------------------------------------------------------- |
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173 // ScanInfoIe::IsKeyManagement |
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174 // ----------------------------------------------------------------------------- |
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175 // |
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176 |
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177 TBool HssScanInfoIe::IsKeyManagement( |
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178 HssScanInfoIeType ie_type, |
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179 HssScanInfoIeKeyManagement key_type, |
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180 TUint8 /* ie_length */, |
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181 const TUint8* ie_data ) |
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182 { |
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183 const TUint8* key_data = NULL; |
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184 const TUint8* key_comp = NULL; |
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185 |
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186 if ( ie_type == HssScanInfoIeTypeRsn ) |
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187 { |
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188 if ( key_type == HssScanInfoIeKeyManagementEap ) |
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189 { |
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190 key_comp = &SCANINFOIE_RSNIE_OUI_EAP[0]; |
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191 } |
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192 else |
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193 { |
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194 key_comp = &SCANINFOIE_RSNIE_OUI_PSK[0]; |
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195 } |
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196 TUint32 suites( *( ie_data + SCANINFOIE_RSNIE_PAIRWISE_SUITE_COUNT_OFFSET ) ); |
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197 key_data = ie_data + SCANINFOIE_RSNIE_PAIRWISE_SUITE_OFFSET + |
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198 ( suites * SCANINFOIE_OUI_LENGTH ); |
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199 } |
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200 else |
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201 { |
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202 if ( key_type == HssScanInfoIeKeyManagementEap ) |
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203 { |
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204 key_comp = &SCANINFOIE_WPAIE_OUI_EAP[0]; |
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205 } |
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206 else |
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207 { |
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208 key_comp = &SCANINFOIE_WPAIE_OUI_PSK[0]; |
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209 } |
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210 TUint32 suites( *( ie_data + SCANINFOIE_WPAIE_PAIRWISE_SUITE_COUNT_OFFSET ) ); |
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211 key_data = ie_data + SCANINFOIE_WPAIE_PAIRWISE_SUITE_OFFSET + |
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212 ( suites * SCANINFOIE_OUI_LENGTH ); |
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213 } |
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214 TUint16 key_suites( *key_data ); |
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215 key_data += sizeof( key_suites ); |
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216 |
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217 while ( key_suites-- ) |
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218 { |
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219 if ( !Compare( |
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220 key_data + ( key_suites * SCANINFOIE_OUI_LENGTH ), SCANINFOIE_OUI_LENGTH, |
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221 key_comp, SCANINFOIE_OUI_LENGTH ) ) |
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222 { |
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223 return true; |
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224 } |
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225 } |
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226 |
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227 return false; |
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228 }; |
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229 |
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230 // ----------------------------------------------------------------------------- |
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231 // ScanInfoIe::IsWpa2Ciphers |
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232 // ----------------------------------------------------------------------------- |
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233 // |
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234 TBool HssScanInfoIe::IsWpa2Ciphers( |
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235 HssScanInfoIeType ie_type, |
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236 TUint8 /* ie_length */, |
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237 const TUint8* ie_data ) |
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238 { |
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239 /** |
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240 * WPA IE is not used in WPA2 |
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241 */ |
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242 if ( ie_type == HssScanInfoIeTypeWpa ) |
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243 { |
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244 return false; |
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245 } |
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246 |
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247 const TUint8* cipher = |
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248 ie_data + SCANINFOIE_RSNIE_GROUP_SUITE_OFFSET; |
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249 |
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250 if ( Compare( |
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251 cipher, SCANINFOIE_OUI_LENGTH, |
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252 &SCANINFOIE_RSNIE_OUI_CCMP[0], SCANINFOIE_OUI_LENGTH ) ) |
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253 { |
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254 return false; |
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255 } |
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256 |
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257 TUint32 suites( *( ie_data + SCANINFOIE_RSNIE_PAIRWISE_SUITE_COUNT_OFFSET ) ); |
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258 cipher = ie_data + SCANINFOIE_RSNIE_PAIRWISE_SUITE_OFFSET; |
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259 |
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260 while ( suites-- ) |
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261 { |
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262 if ( !Compare( |
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263 cipher + ( suites * SCANINFOIE_OUI_LENGTH ), SCANINFOIE_OUI_LENGTH, |
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264 &SCANINFOIE_RSNIE_OUI_CCMP[0], SCANINFOIE_OUI_LENGTH ) ) |
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265 { |
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266 return true; |
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267 } |
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268 } |
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269 |
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270 return false; |
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271 } |