--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/yubikey/corelib.php Fri Jun 30 17:49:12 2017 -0400
@@ -0,0 +1,300 @@
+<?php
+
+define('YK_SEC_NORMAL_USERNAME', 1);
+define('YK_SEC_NORMAL_PASSWORD', 2);
+define('YK_SEC_ELEV_USERNAME', 4);
+define('YK_SEC_ELEV_PASSWORD', 8);
+define('YK_SEC_ALLOW_NO_OTP', 16);
+
+define('YK_DEFAULT_VERIFY_URL', 'http://api.yubico.com/wsapi/verify');
+
+function generate_yubikey_field($name = 'yubikey_otp', $value = false)
+{
+ global $lang;
+
+ $fid = substr(sha1(microtime() . mt_rand()), 0, 12);
+ $class = $value ? 'wasfull' : 'wasempty';
+ $html = '<input id="yubifield' . $fid . '" class="' . $class . '" type="hidden" name="' . $name . '" value="' . ( is_string($value) ? $value : '' ) . '" />';
+ $html .= '<noscript><input type="text" name="' . $name . '" class="yubikey_noscript" value="' . ( is_string($value) ? $value : '' ) . '" /> </noscript>';
+ if ( $value )
+ {
+ $html .= '<span id="yubistat' . $fid . '" class="yubikey_status enrolled">' . $lang->get('yubiauth_ctl_status_enrolled') . '</span>';
+ $atext = $lang->get('yubiauth_ctl_btn_change_key');
+ $classadd = ' abutton_green';
+ }
+ else
+ {
+ $html .= '<span id="yubistat' . $fid . '" class="yubikey_status empty">' . $lang->get('yubiauth_ctl_status_empty') . '</span>';
+ $atext = $lang->get('yubiauth_ctl_btn_enroll');
+ $classadd = '';
+ }
+
+ $html .= ' <span class="yubikey_pubkey">';
+ if ( !empty($value) )
+ $html .= htmlspecialchars(substr($value, 0, 12));
+ $html .= '</span> ';
+
+ $html .= ' <a class="abutton' . $classadd . ' yubikey_enroll" onclick="yk_mb_init(\'yubifield' . $fid . '\', \'yubistat' . $fid . '\'); return false;" href="#enroll">' . $atext . '</a>';
+ if ( $value )
+ {
+ $html .= ' <a class="abutton abutton_red yubikey_enroll" onclick="yk_clear(\'yubifield' . $fid . '\', \'yubistat' . $fid . '\'); return false;" href="#enroll">'
+ . $lang->get('yubiauth_ctl_btn_clear') .
+ '</a>';
+ }
+
+ return $html;
+}
+
+function yubikey_validate_otp($otp)
+{
+ $api_key = getConfig('yubikey_api_key');
+ $api_id = getConfig('yubikey_api_key_id');
+ // Don't require an API key or user ID to be installed if we're using local YMS
+ if ( !(getConfig('yubikey_use_local_yms', 0) && defined('YMS_INSTALLED')) && (!$api_key || !$api_id) )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'missing_api_key'
+ );
+ }
+ if ( !preg_match('/^[cbdefghijklnrtuv]{44}$/', $otp) )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'otp_invalid_chars'
+ );
+ }
+ // are we using local YMS?
+ if ( getConfig('yubikey_use_local_yms', 0) && defined('YMS_INSTALLED') )
+ {
+ $result = yms_validate_otp($otp, $api_id);
+ if ( $result == 'OK' )
+ {
+ return array(
+ 'success' => true
+ );
+ }
+ else
+ {
+ return array(
+ 'success' => false,
+ 'error' => strtolower("response_{$result}")
+ );
+ }
+ }
+ // make HTTP request
+ require_once( ENANO_ROOT . '/includes/http.php' );
+ $auth_url = getConfig('yubikey_auth_server', YK_DEFAULT_VERIFY_URL);
+ $auth_url = preg_replace('#^https?://#i', '', $auth_url);
+ if ( !preg_match('#^(\[?[a-z0-9-:]+(?:\.[a-z0-9-:]+\]?)*)(?::([0-9]+))?(/.*)$#U', $auth_url, $match) )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'invalid_auth_url'
+ );
+ }
+ $auth_server =& $match[1];
+ $auth_port = ( !empty($match[2]) ) ? intval($match[2]) : 80;
+ $auth_uri =& $match[3];
+ try
+ {
+ $req = new Request_HTTP($auth_server, $auth_uri, 'GET', $auth_port);
+ $req->add_get('id', strval($api_id));
+ $req->add_get('otp', $otp);
+ $req->add_get('h', yubikey_sign($req->parms_get));
+
+ $response = $req->get_response_body();
+ }
+ catch ( Exception $e )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'http_failed',
+ 'http_error' => $e->getMessage()
+ );
+ }
+
+ if ( $req->response_code != HTTP_OK )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'http_response_error'
+ );
+ }
+ $response = trim($response);
+ if ( !preg_match_all('/^([a-z0-9_]+)=(.*?)\r?$/m', $response, $matches) )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'malformed_response'
+ );
+ }
+ $response = array();
+ foreach ( $matches[0] as $i => $_ )
+ {
+ $response[$matches[1][$i]] = $matches[2][$i];
+ }
+ // make sure we have a status
+ if ( !isset($response['status']) )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'response_missing_status'
+ );
+ }
+ // verify response signature
+ // MISSING_PARAMETER is the ONLY situation under which an unsigned response is acceptable
+ if ( $response['status'] !== 'MISSING_PARAMETER' )
+ {
+ if ( !isset($response['h']) )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'response_missing_sig'
+ );
+ }
+ if ( yubikey_sign($response) !== $response['h'] )
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'response_invalid_sig'
+ );
+ }
+ }
+ if ( $response['status'] === 'OK' )
+ {
+ if ( yubikey_verify_timestamp($response['t']) )
+ {
+ return array(
+ 'success' => true
+ );
+ }
+ else
+ {
+ return array(
+ 'success' => false,
+ 'error' => 'timestamp_check_failed'
+ );
+ }
+ }
+ else
+ {
+ return array(
+ 'success' => false,
+ 'error' => strtolower("response_{$response['status']}")
+ );
+ }
+}
+
+function yubikey_sign($arr, $use_api_key = false)
+{
+ static $api_key = false;
+
+ ksort($arr);
+
+ if ( !$use_api_key )
+ {
+ if ( !$api_key )
+ {
+ $api_key = getConfig('yubikey_api_key');
+ $api_key = hexencode(base64_decode($api_key), '', '');
+ }
+ $use_api_key = $api_key;
+ }
+ /*
+ else
+ {
+ $use_api_key = hexencode(base64_decode($use_api_key), '', '');
+ }
+ */
+
+ foreach ( array('h', 'title', 'auth', 'do') as $key )
+ {
+ if ( isset($arr[$key]) )
+ unset($arr[$key]);
+ }
+
+ $req = array();
+ foreach ( $arr as $key => $val )
+ {
+ $req[] = "$key=$val";
+ }
+ $req = implode('&', $req);
+
+ $sig = hmac_sha1($req, $use_api_key);
+ $sig = hexdecode($sig);
+ $sig = base64_encode($sig);
+
+ return $sig;
+}
+
+/**
+ * Validate the timestamp returned in a Yubico API response. Borrowed from Drupal and backported for friendliness with earlier versions of PHP.
+ * @param string Yubico timestamp
+ * @return bool True if valid, false otherwise
+ */
+
+function yubikey_verify_timestamp($timestamp)
+{
+ $tolerance = intval(getConfig('yubikey_api_ts_tolerance', 150));
+
+ $now = time();
+ $timestamp_seconds = yk_strtotime($timestamp);
+
+ if ( !$timestamp || !$now || !$timestamp_seconds )
+ {
+ return false;
+ }
+
+ if ( ( $timestamp_seconds + $tolerance ) > $now && ( $timestamp_seconds - $tolerance ) < $now )
+ {
+ return true;
+ }
+
+ return false;
+}
+
+function yk_strtotime($timestamp)
+{
+ 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) )
+ return 0;
+
+ $hour = intval($match[4]);
+ $minute = intval($match[5]);
+ $second = intval($match[6]);
+ $month = intval($match[2]);
+ $day = intval($match[3]);
+ $year = intval($match[1]);
+
+ return gmmktime($hour, $minute, $second, $month, $day, $year);
+}
+
+$plugins->attachHook('compile_template', 'yubikey_attach_headers($this);');
+
+function yubikey_attach_headers(&$template)
+{
+ global $db, $session, $paths, $template, $plugins; // Common objects
+
+ if ( getConfig('yubikey_enable', '1') != '1' )
+ return true;
+
+ $template->add_header('<script type="text/javascript" src="' . scriptPath . '/plugins/yubikey/yubikey.js"></script>');
+ $template->add_header('<link rel="stylesheet" type="text/css" href="' . scriptPath . '/plugins/yubikey/yubikey.css" />');
+ // config option for all users have yubikey
+ $user_flags = 0;
+ $yk_enabled = 0;
+ if ( $session->user_logged_in )
+ {
+ $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;");
+ if ( !$q )
+ $db->_die();
+
+ list($yk_enabled, $user_flags) = $db->fetchrow_num();
+ $db->free_result();
+ }
+ $yk_enabled = intval($yk_enabled);
+ $user_flags = intval($user_flags);
+
+ $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>');
+}
+