1 <?php |
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2 |
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3 if ( getConfig('yubikey_enable', '1') != '1' ) |
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4 return true; |
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5 |
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6 // hook into auth |
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7 $plugins->attachHook('login_process_userdata_json', 'return yubikey_auth_hook_json($userinfo, $req["level"], @$req["remember"]);'); |
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8 // hook into special page init |
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9 $plugins->attachHook('session_started', 'yubikey_add_special_pages();'); |
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10 // session key security |
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11 $plugins->attachHook('session_key_calc', 'yubikey_sk_calc($user_id, $key_pieces, $sk_mode);'); |
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12 |
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13 function yubikey_auth_hook_json(&$userdata, $level, $remember) |
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14 { |
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15 global $db, $session, $paths, $template, $plugins; // Common objects |
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16 global $lang; |
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17 |
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18 $do_validate_otp = false; |
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19 $do_validate_user = false; |
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20 $do_validate_pass = false; |
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21 |
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22 $user_flag = ( $level >= USER_LEVEL_CHPREF ) ? YK_SEC_ELEV_USERNAME : YK_SEC_NORMAL_USERNAME; |
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23 $pass_flag = ( $level >= USER_LEVEL_CHPREF ) ? YK_SEC_ELEV_PASSWORD : YK_SEC_NORMAL_PASSWORD; |
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24 |
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25 $auth_log_prefix = ( $level >= USER_LEVEL_CHPREF ) ? 'admin_' : ''; |
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26 |
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27 // Sort of a hack: if the password looks like an OTP and the OTP field is empty, use the password as the OTP |
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28 if ( empty($userdata['yubikey_otp']) && preg_match('/^[cbdefghijklnrtuv]{44}$/', $userdata['password'] ) ) |
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29 { |
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30 $userdata['yubikey_otp'] = $userdata['password']; |
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31 } |
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32 |
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33 // Lockouts removed from here - they're done during preprocessing now. |
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34 |
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35 if ( !empty($userdata['username']) ) |
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36 { |
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37 // get flags |
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38 $q = $db->sql_query('SELECT user_id, user_yubikey_flags FROM ' . table_prefix . "users WHERE " . ENANO_SQLFUNC_LOWERCASE . "(username) = '" . $db->escape(strtolower($userdata['username'])) . "';"); |
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39 if ( !$q ) |
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40 $db->die_json(); |
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41 |
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42 if ( $db->numrows() < 1 ) |
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43 { |
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44 // Username not found - let the main login function handle it |
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45 $db->free_result(); |
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46 return null; |
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47 } |
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48 list($user_id, $flags) = $db->fetchrow_num(); |
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49 $flags = intval($flags); |
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50 // At the point the username is validated. |
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51 $do_validate_user = false; |
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52 $do_validate_pass = $flags & $pass_flag; |
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53 if ( empty($userdata['yubikey_otp']) ) |
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54 { |
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55 // no OTP was provided |
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56 // make sure the user has allowed logging in with no OTP |
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57 if ( !($flags & YK_SEC_ALLOW_NO_OTP) ) |
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58 { |
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59 // We also might have no Yubikeys enrolled. |
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60 $q = $db->sql_query('SELECT 1 FROM ' . table_prefix . "yubikey WHERE user_id = $user_id;"); |
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61 if ( !$q ) |
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62 $db->die_json(); |
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63 |
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64 if ( $db->numrows() > 0 ) |
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65 { |
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66 // Yep at least one key is enrolled. |
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67 // I don't think these should be logged because they'll usually just be innocent mistakes. |
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68 $db->free_result(); |
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69 return array( |
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70 'mode' => 'error', |
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71 'error' => 'yubiauth_err_must_have_otp' |
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72 ); |
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73 } |
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74 // Nope, no keys enrolled, user hasn't enabled Yubikey support |
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75 $db->free_result(); |
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76 } |
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77 // we're ok, use normal password auth |
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78 return null; |
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79 } |
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80 else |
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81 { |
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82 // user did enter an OTP; make sure it's associated with the username |
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83 $yubi_uid = $db->escape(substr($userdata['yubikey_otp'], 0, 12)); |
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84 $q = $db->sql_query('SELECT user_id FROM ' . table_prefix . 'yubikey WHERE yubi_uid = \'' . $yubi_uid . '\';'); |
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85 if ( !$q ) |
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86 $db->die_json(); |
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87 if ( $db->numrows() < 1 ) |
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88 { |
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89 $db->free_result(); |
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90 return array( |
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91 'mode' => 'error', |
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92 'error' => 'yubiauth_err_key_not_authorized' |
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93 ); |
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94 } |
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95 list($yubi_pair_uid) = $db->fetchrow_num(); |
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96 if ( $yubi_pair_uid !== $user_id ) |
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97 { |
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98 return array( |
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99 'mode' => 'error', |
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100 'error' => 'yubiauth_err_uid_mismatch' |
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101 ); |
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102 } |
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103 $db->free_result(); |
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104 $do_validate_otp = true; |
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105 } |
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106 } |
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107 else if ( !empty($userdata['yubikey_otp']) ) |
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108 { |
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109 // we have an OTP, but no username to work with |
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110 $yubi_uid = substr($userdata['yubikey_otp'], 0, 12); |
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111 if ( !preg_match('/^[cbdefghijklnrtuv]{12}$/', $yubi_uid ) ) |
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112 { |
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113 return array( |
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114 'mode' => 'error', |
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115 'error' => 'yubiauth_err_invalid_otp' |
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116 ); |
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117 } |
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118 $q = $db->sql_query('SELECT u.user_id, u.username, u.user_yubikey_flags FROM ' . table_prefix . "users AS u\n" |
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119 . " LEFT JOIN " . table_prefix . "yubikey AS y\n" |
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120 . " ON ( y.user_id = u.user_id )\n" |
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121 . " WHERE y.yubi_uid = '$yubi_uid'\n" |
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122 . " GROUP BY u.user_yubikey_flags;"); |
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123 if ( !$q ) |
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124 $db->_die(); |
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125 |
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126 if ( $db->numrows() < 1 ) |
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127 { |
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128 if ( !$do_validate_pass ) |
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129 $session->sql('INSERT INTO ' . table_prefix . "logs(log_type,action,time_id,date_string,author,edit_summary,page_text) VALUES\n" |
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130 . ' (\'security\', \'' . $auth_log_prefix . 'auth_bad\', '.time().', \'DEPRECATED\', \'(Yubikey)\', ' |
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131 . '\''.$db->escape($_SERVER['REMOTE_ADDR']).'\', ' . intval($level) . ')'); |
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132 |
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133 return array( |
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134 'mode' => 'error', |
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135 'error' => 'yubiauth_err_key_not_authorized' |
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136 ); |
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137 } |
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138 |
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139 list($user_id, $username, $flags) = $db->fetchrow_num(); |
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140 |
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141 if ( $level > USER_LEVEL_MEMBER ) |
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142 { |
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143 $session->start(); |
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144 if ( $session->user_logged_in && ($session->user_id !== $user_id) ) |
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145 { |
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146 return array( |
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147 'mode' => 'error', |
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148 'error' => 'yubiauth_err_uid_mismatch' |
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149 ); |
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150 } |
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151 } |
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152 |
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153 $do_validate_otp = true; |
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154 $do_validate_user = $flags & $user_flag; |
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155 $do_validate_pass = $flags & $pass_flag; |
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156 // to complete security logs later |
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157 $userdata['username'] = $username; |
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158 } |
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159 else |
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160 { |
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161 // Nothing - no username or OTP. This request can't be used; throw it out. |
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162 return array( |
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163 'mode' => 'error', |
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164 'error' => 'yubiauth_err_nothing_provided' |
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165 ); |
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166 } |
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167 |
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168 if ( $do_validate_otp ) |
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169 { |
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170 // We need to validate the OTP. |
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171 $otp_check = yubikey_validate_otp($userdata['yubikey_otp']); |
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172 if ( !$otp_check['success'] ) |
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173 { |
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174 if ( !$do_validate_pass ) |
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175 $session->sql('INSERT INTO ' . table_prefix . "logs(log_type,action,time_id,date_string,author,edit_summary,page_text) VALUES\n" |
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176 . ' (\'security\', \'' . $auth_log_prefix . 'auth_bad\', '.time().', \'DEPRECATED\', \'(Yubikey)\', ' |
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177 . '\''.$db->escape($_SERVER['REMOTE_ADDR']).'\', ' . intval($level) . ')'); |
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178 |
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179 if ( $otp_check['error'] === 'http_failed' ) |
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180 { |
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181 return array( |
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182 'mode' => 'error', |
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183 'error' => 'yubiauth_err_' . $otp_check['error'], |
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184 'http_error' => $otp_check['http_error'] |
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185 ); |
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186 } |
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187 return array( |
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188 'mode' => 'error', |
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189 'error' => 'yubiauth_err_' . $otp_check['error'] |
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190 ); |
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191 } |
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192 } |
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193 if ( $do_validate_user ) |
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194 { |
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195 if ( empty($username) ) |
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196 { |
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197 return array( |
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198 'mode' => 'error', |
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199 'error' => 'yubiauth_err_must_have_username' |
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200 ); |
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201 } |
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202 if ( strtolower($username) !== strtolower($userdata['username']) ) |
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203 { |
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204 // Username incorrect |
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205 if ( !$do_validate_pass ) |
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206 $session->sql('INSERT INTO ' . table_prefix . "logs(log_type,action,time_id,date_string,author,edit_summary,page_text) VALUES\n" |
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207 . ' (\'security\', \'' . $auth_log_prefix . 'auth_bad\', '.time().', \'DEPRECATED\', \'(Yubikey)\', ' |
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208 . '\''.$db->escape($_SERVER['REMOTE_ADDR']).'\', ' . intval($level) . ')'); |
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209 return array( |
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210 'mode' => 'error', |
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211 'error' => 'invalid_credentials' |
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212 ); |
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213 } |
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214 } |
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215 // Do we need to have the password validated? |
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216 if ( $do_validate_pass ) |
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217 { |
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218 if ( empty($userdata['password']) ) |
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219 { |
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220 return array( |
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221 'mode' => 'error', |
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222 'error' => 'yubiauth_err_must_have_password' |
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223 ); |
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224 } |
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225 // Yes; return and let the login API continue |
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226 return null; |
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227 } |
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228 else |
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229 { |
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230 // No password required; validated, issue session key |
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231 $session->sql('INSERT INTO ' . table_prefix . "logs(log_type,action,time_id,date_string,author,edit_summary,page_text) VALUES\n" |
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232 . ' (\'security\', \'' . $auth_log_prefix . 'auth_good\', '.time().', \'DEPRECATED\', \'' . $db->escape($userdata['username']) . '\', ' |
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233 . '\''.$db->escape($_SERVER['REMOTE_ADDR']).'\', ' . intval($level) . ')'); |
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234 |
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235 $q = $db->sql_query('SELECT password FROM ' . table_prefix . "users WHERE user_id = $user_id;"); |
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236 if ( !$q ) |
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237 $db->_die(); |
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238 |
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239 list($password) = $db->fetchrow_num(); |
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240 $db->free_result(); |
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241 |
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242 $session->register_session($user_id, $userdata['username'], $password, intval($level), $remember); |
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243 return true; |
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244 } |
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245 } |
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246 |
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247 function yubikey_add_special_pages() |
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248 { |
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249 global $db, $session, $paths, $template, $plugins; // Common objects |
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250 global $lang; |
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251 |
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252 if ( getConfig('yubikey_enable', '1') != '1' ) |
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253 return true; |
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254 |
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255 $paths->add_page(array( |
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256 'name' => $lang->get('yubiauth_specialpage_yubikey'), |
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257 'urlname' => 'Yubikey', |
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258 'namespace' => 'Special', |
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259 'visible' => 0, 'protected' => 0, 'comments_on' => 0, 'special' => 0 |
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260 )); |
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261 } |
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262 |
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263 function yubikey_sk_calc($user_id, &$key_pieces, &$sk_mode) |
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264 { |
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265 global $db, $session, $paths, $template, $plugins; // Common objects |
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266 // hash the user's yubikeys |
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267 $q = $db->sql_query('SELECT yubi_uid FROM ' . table_prefix . "yubikey WHERE user_id = $user_id;"); |
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268 if ( !$q ) |
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269 $db->_die(); |
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270 |
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271 while ( $row = $db->fetchrow() ) |
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272 { |
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273 $key_pieces[] = $row['yubi_uid']; |
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274 } |
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275 } |
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276 |
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277 function page_Special_Yubikey() |
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278 { |
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279 global $db, $session, $paths, $template, $plugins; // Common objects |
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280 |
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281 header('Content-type: text/javascript'); |
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282 /* |
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283 if ( isset($_GET['validate_otp']) ) |
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284 { |
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285 echo enano_json_encode(yubikey_validate_otp($_GET['validate_otp'])); |
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286 return true; |
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287 } |
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288 */ |
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289 if ( isset($_GET['get_flags']) || isset($_POST['get_flags']) ) |
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290 { |
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291 $yubi_uid = substr($_REQUEST['get_flags'], 0, 12); |
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292 if ( !preg_match('/^[cbdefghijklnrtuv]{12}$/', $yubi_uid) ) |
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293 { |
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294 return print enano_json_encode(array( |
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295 'mode' => 'error', |
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296 'error' => 'invalid_otp' |
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297 )); |
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298 } |
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299 $q = $db->sql_query('SELECT u.user_yubikey_flags FROM ' . table_prefix . "users AS u\n" |
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300 . " LEFT JOIN " . table_prefix . "yubikey AS y\n" |
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301 . " ON ( y.user_id = u.user_id )\n" |
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302 . " WHERE y.yubi_uid = '$yubi_uid'\n" |
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303 . " GROUP BY u.user_yubikey_flags;"); |
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304 if ( !$q ) |
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305 $db->_die(); |
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306 |
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307 if ( $db->numrows() < 1 ) |
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308 { |
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309 return print enano_json_encode(array( |
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310 'mode' => 'error', |
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311 'error' => 'key_not_authorized' |
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312 )); |
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313 } |
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314 |
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315 list($flags) = $db->fetchrow_num(); |
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316 |
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317 echo enano_json_encode(array( |
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318 // We strip YK_SEC_ALLOW_NO_OTP here for security reasons. |
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319 'flags' => intval($flags & ~YK_SEC_ALLOW_NO_OTP) |
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320 )); |
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321 |
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322 return true; |
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323 } |
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324 } |
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325 |
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