author | Dan Fuhry <dan@enanocms.org> |
Fri, 11 Nov 2011 00:30:49 -0500 | |
changeset 37 | 5e946a3f405b |
parent 36 | f2aa4bc50d2f |
permissions | -rw-r--r-- |
0 | 1 |
<?php |
2 |
||
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define('YK_SEC_NORMAL_USERNAME', 1); |
|
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define('YK_SEC_NORMAL_PASSWORD', 2); |
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define('YK_SEC_ELEV_USERNAME', 4); |
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define('YK_SEC_ELEV_PASSWORD', 8); |
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define('YK_SEC_ALLOW_NO_OTP', 16); |
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define('YK_DEFAULT_VERIFY_URL', 'http://api.yubico.com/wsapi/verify'); |
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function generate_yubikey_field($name = 'yubikey_otp', $value = false) |
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{ |
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37 | 13 |
global $lang; |
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$fid = substr(sha1(microtime() . mt_rand()), 0, 12); |
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$class = $value ? 'wasfull' : 'wasempty'; |
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$html = '<input id="yubifield' . $fid . '" class="' . $class . '" type="hidden" name="' . $name . '" value="' . ( is_string($value) ? $value : '' ) . '" />'; |
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$html .= '<noscript><input type="text" name="' . $name . '" class="yubikey_noscript" value="' . ( is_string($value) ? $value : '' ) . '" /> </noscript>'; |
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if ( $value ) |
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{ |
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$html .= '<span id="yubistat' . $fid . '" class="yubikey_status enrolled">' . $lang->get('yubiauth_ctl_status_enrolled') . '</span>'; |
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$atext = $lang->get('yubiauth_ctl_btn_change_key'); |
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$classadd = ' abutton_green'; |
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} |
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else |
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{ |
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$html .= '<span id="yubistat' . $fid . '" class="yubikey_status empty">' . $lang->get('yubiauth_ctl_status_empty') . '</span>'; |
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$atext = $lang->get('yubiauth_ctl_btn_enroll'); |
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$classadd = ''; |
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} |
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||
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$html .= ' <span class="yubikey_pubkey">'; |
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if ( !empty($value) ) |
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$html .= htmlspecialchars(substr($value, 0, 12)); |
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$html .= '</span> '; |
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$html .= ' <a class="abutton' . $classadd . ' yubikey_enroll" onclick="yk_mb_init(\'yubifield' . $fid . '\', \'yubistat' . $fid . '\'); return false;" href="#enroll">' . $atext . '</a>'; |
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if ( $value ) |
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{ |
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$html .= ' <a class="abutton abutton_red yubikey_enroll" onclick="yk_clear(\'yubifield' . $fid . '\', \'yubistat' . $fid . '\'); return false;" href="#enroll">' |
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. $lang->get('yubiauth_ctl_btn_clear') . |
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'</a>'; |
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} |
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return $html; |
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0 | 46 |
} |
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function yubikey_validate_otp($otp) |
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{ |
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37 | 50 |
$api_key = getConfig('yubikey_api_key'); |
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$api_id = getConfig('yubikey_api_key_id'); |
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// Don't require an API key or user ID to be installed if we're using local YMS |
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if ( !(getConfig('yubikey_use_local_yms', 0) && defined('YMS_INSTALLED')) && (!$api_key || !$api_id) ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'missing_api_key' |
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); |
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} |
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if ( !preg_match('/^[cbdefghijklnrtuv]{44}$/', $otp) ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'otp_invalid_chars' |
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); |
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} |
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// are we using local YMS? |
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if ( getConfig('yubikey_use_local_yms', 0) && defined('YMS_INSTALLED') ) |
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{ |
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$result = yms_validate_otp($otp, $api_id); |
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if ( $result == 'OK' ) |
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{ |
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return array( |
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'success' => true |
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); |
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} |
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else |
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{ |
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return array( |
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'success' => false, |
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'error' => strtolower("response_{$result}") |
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); |
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} |
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} |
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// make HTTP request |
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require_once( ENANO_ROOT . '/includes/http.php' ); |
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$auth_url = getConfig('yubikey_auth_server', YK_DEFAULT_VERIFY_URL); |
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$auth_url = preg_replace('#^https?://#i', '', $auth_url); |
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if ( !preg_match('#^(\[?[a-z0-9-:]+(?:\.[a-z0-9-:]+\]?)*)(?::([0-9]+))?(/.*)$#U', $auth_url, $match) ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'invalid_auth_url' |
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); |
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} |
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$auth_server =& $match[1]; |
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$auth_port = ( !empty($match[2]) ) ? intval($match[2]) : 80; |
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$auth_uri =& $match[3]; |
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try |
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{ |
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$req = new Request_HTTP($auth_server, $auth_uri, 'GET', $auth_port); |
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$req->add_get('id', strval($api_id)); |
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$req->add_get('otp', $otp); |
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$req->add_get('h', yubikey_sign($req->parms_get)); |
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$response = $req->get_response_body(); |
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} |
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catch ( Exception $e ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'http_failed', |
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'http_error' => $e->getMessage() |
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); |
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} |
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||
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if ( $req->response_code != HTTP_OK ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'http_response_error' |
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); |
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} |
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$response = trim($response); |
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if ( !preg_match_all('/^([a-z0-9_]+)=(.*?)\r?$/m', $response, $matches) ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'malformed_response' |
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); |
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} |
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$response = array(); |
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foreach ( $matches[0] as $i => $_ ) |
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{ |
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$response[$matches[1][$i]] = $matches[2][$i]; |
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} |
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// make sure we have a status |
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if ( !isset($response['status']) ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'response_missing_status' |
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); |
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} |
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// verify response signature |
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// MISSING_PARAMETER is the ONLY situation under which an unsigned response is acceptable |
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if ( $response['status'] !== 'MISSING_PARAMETER' ) |
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{ |
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if ( !isset($response['h']) ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'response_missing_sig' |
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); |
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} |
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if ( yubikey_sign($response) !== $response['h'] ) |
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{ |
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return array( |
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'success' => false, |
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'error' => 'response_invalid_sig' |
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); |
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} |
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} |
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if ( $response['status'] === 'OK' ) |
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{ |
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if ( yubikey_verify_timestamp($response['t']) ) |
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{ |
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return array( |
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'success' => true |
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); |
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} |
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else |
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{ |
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return array( |
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'success' => false, |
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'error' => 'timestamp_check_failed' |
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); |
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} |
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} |
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else |
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{ |
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return array( |
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'success' => false, |
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'error' => strtolower("response_{$response['status']}") |
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); |
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} |
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0 | 187 |
} |
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27 | 189 |
function yubikey_sign($arr, $use_api_key = false) |
0 | 190 |
{ |
37 | 191 |
static $api_key = false; |
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ksort($arr); |
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if ( !$use_api_key ) |
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{ |
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if ( !$api_key ) |
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{ |
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$api_key = getConfig('yubikey_api_key'); |
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$api_key = hexencode(base64_decode($api_key), '', ''); |
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} |
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$use_api_key = $api_key; |
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} |
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/* |
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else |
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{ |
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$use_api_key = hexencode(base64_decode($use_api_key), '', ''); |
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} |
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*/ |
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foreach ( array('h', 'title', 'auth', 'do') as $key ) |
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{ |
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if ( isset($arr[$key]) ) |
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unset($arr[$key]); |
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} |
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$req = array(); |
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foreach ( $arr as $key => $val ) |
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{ |
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$req[] = "$key=$val"; |
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} |
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$req = implode('&', $req); |
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$sig = hmac_sha1($req, $use_api_key); |
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$sig = hexdecode($sig); |
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$sig = base64_encode($sig); |
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||
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return $sig; |
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0 | 229 |
} |
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10 | 231 |
/** |
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* Validate the timestamp returned in a Yubico API response. Borrowed from Drupal and backported for friendliness with earlier versions of PHP. |
|
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* @param string Yubico timestamp |
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* @return bool True if valid, false otherwise |
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*/ |
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function yubikey_verify_timestamp($timestamp) |
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{ |
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37 | 239 |
$tolerance = intval(getConfig('yubikey_api_ts_tolerance', 150)); |
240 |
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$now = time(); |
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$timestamp_seconds = yk_strtotime($timestamp); |
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10 | 243 |
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37 | 244 |
if ( !$timestamp || !$now || !$timestamp_seconds ) |
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{ |
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return false; |
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} |
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10 | 248 |
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37 | 249 |
if ( ( $timestamp_seconds + $tolerance ) > $now && ( $timestamp_seconds - $tolerance ) < $now ) |
250 |
{ |
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return true; |
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} |
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10 | 253 |
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37 | 254 |
return false; |
10 | 255 |
} |
256 |
||
21
f34ecfa459ab
Wrote my own Yubico-time-to-Unix-time conversion, as strtotime() was unreliable.
Dan
parents:
20
diff
changeset
|
257 |
function yk_strtotime($timestamp) |
f34ecfa459ab
Wrote my own Yubico-time-to-Unix-time conversion, as strtotime() was unreliable.
Dan
parents:
20
diff
changeset
|
258 |
{ |
37 | 259 |
if ( !preg_match('/^([0-9]{4})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(?:Z[0-9]+)?$/', $timestamp, $match) ) |
260 |
return 0; |
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||
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$hour = intval($match[4]); |
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$minute = intval($match[5]); |
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$second = intval($match[6]); |
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$month = intval($match[2]); |
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$day = intval($match[3]); |
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$year = intval($match[1]); |
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||
269 |
return gmmktime($hour, $minute, $second, $month, $day, $year); |
|
21
f34ecfa459ab
Wrote my own Yubico-time-to-Unix-time conversion, as strtotime() was unreliable.
Dan
parents:
20
diff
changeset
|
270 |
} |
10 | 271 |
|
0 | 272 |
$plugins->attachHook('compile_template', 'yubikey_attach_headers($this);'); |
273 |
||
274 |
function yubikey_attach_headers(&$template) |
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275 |
{ |
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37 | 276 |
global $db, $session, $paths, $template, $plugins; // Common objects |
277 |
||
278 |
if ( getConfig('yubikey_enable', '1') != '1' ) |
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279 |
return true; |
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280 |
||
281 |
$template->add_header('<script type="text/javascript" src="' . scriptPath . '/plugins/yubikey/yubikey.js"></script>'); |
|
282 |
$template->add_header('<link rel="stylesheet" type="text/css" href="' . scriptPath . '/plugins/yubikey/yubikey.css" />'); |
|
283 |
// config option for all users have yubikey |
|
284 |
$user_flags = 0; |
|
285 |
$yk_enabled = 0; |
|
286 |
if ( $session->user_logged_in ) |
|
287 |
{ |
|
288 |
$q = $db->sql_query('SELECT COUNT(y.yubi_uid) > 0, u.user_yubikey_flags FROM ' . table_prefix . "yubikey AS y LEFT JOIN " . table_prefix . "users AS u ON ( u.user_id = y.user_id ) WHERE y.user_id = {$session->user_id} GROUP BY u.user_id, u.user_yubikey_flags;"); |
|
289 |
if ( !$q ) |
|
290 |
$db->_die(); |
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291 |
||
292 |
list($yk_enabled, $user_flags) = $db->fetchrow_num(); |
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293 |
$db->free_result(); |
|
294 |
} |
|
295 |
$yk_enabled = intval($yk_enabled); |
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296 |
$user_flags = intval($user_flags); |
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297 |
||
298 |
$template->add_header('<script type="text/javascript">var yk_reg_require_otp = ' . getConfig('yubikey_reg_require_otp', '0') . '; var yk_user_enabled = ' . $yk_enabled . '; var yk_user_flags = ' . $user_flags . ';</script>'); |
|
0 | 299 |
} |
300 |