| 1 |
<?php |
| 2 |
/** |
| 3 |
* Child Site one click connection class |
| 4 |
* |
| 5 |
* @since 4.0 |
| 6 |
* @package dologin |
| 7 |
*/ |
| 8 |
|
| 9 |
namespace dologin; |
| 10 |
|
| 11 |
defined( 'WPINC' ) || exit; |
| 12 |
|
| 13 |
class Site extends Instance { |
| 14 |
|
| 15 |
const TYPE_GEN_TOKEN = 'gen_token'; |
| 16 |
const TYPE_CONNECT = 'connect_site'; |
| 17 |
const TYPE_AUTH = 'auth'; |
| 18 |
const TYPE_EASY_LOGIN = 'easy_login'; // Login to child site |
| 19 |
const TYPE_LOCK = 'lock'; |
| 20 |
const TYPE_DEL = 'del'; |
| 21 |
const QS_NAME_ROOT_AUTH = 'dologin_root_auth'; |
| 22 |
const QS_NAME_EASY_LOGIN = 'dologin_easy_login'; |
| 23 |
|
| 24 |
private $_tb; |
| 25 |
|
| 26 |
protected function __construct() { |
| 27 |
$this->_tb = $this->cls( 'Data' )->tb( 'site' ); |
| 28 |
} |
| 29 |
|
| 30 |
/** |
| 31 |
* Init |
| 32 |
* |
| 33 |
* @since 4.0 |
| 34 |
*/ |
| 35 |
public function init() { |
| 36 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing |
| 37 |
if ( ! empty( $_GET[ self::QS_NAME_ROOT_AUTH ] ) && ! empty( $_POST['pk'] ) ) { |
| 38 |
defined( 'debug' ) && debug( 'knock knock, site connection in' ); |
| 39 |
add_action( 'init', array( $this, 'connect_auth_init' ) ); |
| 40 |
} |
| 41 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 42 |
if ( ! empty( $_GET[ self::QS_NAME_EASY_LOGIN ] ) ) { |
| 43 |
defined( 'debug' ) && debug( 'knock knock, easy login comes' ); |
| 44 |
add_action( 'init', array( $this, 'try_easy_login' ) ); |
| 45 |
} |
| 46 |
} |
| 47 |
|
| 48 |
/** |
| 49 |
* Check cryptographic requirements for site connections. |
| 50 |
* |
| 51 |
* @since 4.6.5 |
| 52 |
*/ |
| 53 |
private function _sodium_ready() { |
| 54 |
return KLSso::sodium_ready() |
| 55 |
&& function_exists( 'sodium_crypto_sign' ) |
| 56 |
&& function_exists( 'sodium_crypto_sign_open' ); |
| 57 |
} |
| 58 |
|
| 59 |
/** |
| 60 |
* Easy login to child site init and jump |
| 61 |
* |
| 62 |
* @since 4.0 |
| 63 |
*/ |
| 64 |
private function _easy_login() { |
| 65 |
global $wpdb; |
| 66 |
if ( ! $this->_sodium_ready() ) { |
| 67 |
return $this->_admin_error( 'dologin_sodium_unavailable' ); |
| 68 |
} |
| 69 |
|
| 70 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 71 |
$pid = empty( $_GET['dologin_id'] ) ? 0 : (int) $_GET['dologin_id']; |
| 72 |
if ( $pid <= 0 ) { |
| 73 |
return; |
| 74 |
} |
| 75 |
// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; id is prepared. |
| 76 |
$row = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM `$this->_tb` WHERE id = %d", $pid ) ); |
| 77 |
if ( ! $row || 1 !== (int) $row->active || 0 !== (int) $row->is_child || ! wp_http_validate_url( $row->url ) ) { |
| 78 |
return $this->_admin_error( 'dologin_site_token_invalid' ); |
| 79 |
} |
| 80 |
|
| 81 |
$audience = $this->_easy_login_audience( $row->url ); |
| 82 |
try { |
| 83 |
$jti = bin2hex( random_bytes( 16 ) ); |
| 84 |
} catch ( \Exception $ex ) { |
| 85 |
return $this->_admin_error( 'dologin_token_generation_failed' ); |
| 86 |
} |
| 87 |
$claims = array( |
| 88 |
'v' => 2, |
| 89 |
'uid' => (int) $row->user_id, |
| 90 |
'pk' => (string) Conf::val( '_pk' ), |
| 91 |
'aud' => $audience, |
| 92 |
'iat' => time(), |
| 93 |
'jti' => $jti, |
| 94 |
); |
| 95 |
$claims_json = $this->_easy_login_claims_json( $claims ); |
| 96 |
$signature = $claims_json ? $this->_pack_b64sign( $claims_json ) : false; |
| 97 |
if ( ! $audience || ! $claims_json || ! $signature ) { |
| 98 |
return $this->_admin_error( 'dologin_token_generation_failed' ); |
| 99 |
} |
| 100 |
$data = wp_json_encode( |
| 101 |
array( |
| 102 |
'claims' => $claims, |
| 103 |
'sig' => $signature, |
| 104 |
) |
| 105 |
); |
| 106 |
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode -- benign base64 encoding of the easy-login token payload. |
| 107 |
$url = add_query_arg( self::QS_NAME_EASY_LOGIN, base64_encode( $data ), $row->url ); |
| 108 |
defined( 'debug' ) && debug( 'Easy login token generated for child site.' ); |
| 109 |
// phpcs:ignore WordPress.Security.SafeRedirect.wp_redirect_wp_redirect -- intentional cross-site redirect to the connected child site. |
| 110 |
wp_redirect( $url ); |
| 111 |
exit(); |
| 112 |
} |
| 113 |
|
| 114 |
/** |
| 115 |
* Allow a connection from a root site |
| 116 |
* |
| 117 |
* @since 4.0 |
| 118 |
*/ |
| 119 |
public function try_easy_login() { |
| 120 |
global $wpdb; |
| 121 |
|
| 122 |
$username = 'N/A'; |
| 123 |
|
| 124 |
// This endpoint bypasses wp-login and must apply the same IP rules and failure limits. |
| 125 |
if ( $this->cls( 'Auth' )->is_ip_denied() ) { |
| 126 |
$this->_error_page( 'dologin_ip_denied', 403 ); |
| 127 |
} |
| 128 |
if ( $this->cls( 'Auth' )->is_rate_limited() ) { |
| 129 |
$this->_error_page( 'dologin_rate_limited', 429 ); |
| 130 |
} |
| 131 |
if ( ! $this->_sodium_ready() ) { |
| 132 |
$this->_error_page( 'dologin_sodium_unavailable', 503 ); |
| 133 |
} |
| 134 |
|
| 135 |
// Magic-link endpoint authenticated by the signed token, not a nonce. |
| 136 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 137 |
$raw_token = isset( $_GET[ self::QS_NAME_EASY_LOGIN ] ) && is_string( $_GET[ self::QS_NAME_EASY_LOGIN ] ) ? sanitize_text_field( wp_unslash( $_GET[ self::QS_NAME_EASY_LOGIN ] ) ) : ''; |
| 138 |
if ( KLSso::force_enabled() ) { |
| 139 |
$this->_error_page( 'dologin_kl_sso_required', 403 ); |
| 140 |
} |
| 141 |
$token = $this->_decode_easy_login_token( $raw_token ); |
| 142 |
if ( ! $token ) { |
| 143 |
defined( 'debug' ) && debug( 'dologin easy login token failed to decode' ); |
| 144 |
return $this->_failed_login( $username ); |
| 145 |
} |
| 146 |
|
| 147 |
$claims = $token['claims']; |
| 148 |
$uid = $claims['uid']; |
| 149 |
$pk = $claims['pk']; |
| 150 |
|
| 151 |
// Validate root site record FIRST; the public key must match a stored, trusted connection. |
| 152 |
// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; values are prepared. |
| 153 |
$row = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM `$this->_tb` WHERE user_id=%d AND pk=%s", $uid, $pk ) ); |
| 154 |
if ( ! $row ) { |
| 155 |
defined( 'debug' ) && debug( 'dologin easy login no record found for uid: ' . $uid . ', pk: ' . $pk ); |
| 156 |
return $this->_failed_login( $username ); |
| 157 |
} |
| 158 |
if ( $row->active != 1 || $row->is_child != 1 ) { |
| 159 |
$this->_error_page( 'dologin_invalid_root_record', 403 ); |
| 160 |
} |
| 161 |
|
| 162 |
// Verify the complete assertion against the stored public key, never a request-only key. |
| 163 |
$signed_claims = $this->_unpack_b64sign( $token['sig'], $row->pk ); |
| 164 |
if ( ! is_string( $signed_claims ) || ! hash_equals( $token['claims_json'], $signed_claims ) ) { |
| 165 |
defined( 'debug' ) && debug( 'dologin easy login token invalid' ); |
| 166 |
return $this->_failed_login( $username ); |
| 167 |
} |
| 168 |
$audience = $this->_easy_login_audience( admin_url() ); |
| 169 |
if ( ! $audience || ! hash_equals( $audience, $claims['aud'] ) ) { |
| 170 |
defined( 'debug' ) && debug( 'dologin easy login token audience mismatch' ); |
| 171 |
return $this->_failed_login( $username ); |
| 172 |
} |
| 173 |
$ts = $claims['iat']; |
| 174 |
$now = time(); |
| 175 |
if ( $ts < $now - 3600 || $ts > $now + 300 ) { // Tokens cannot be older than one hour or materially in the future. |
| 176 |
defined( 'debug' ) && debug( 'dologin easy login token expired. Got ts: ' . $ts . ', current: ' . $now ); |
| 177 |
return $this->_failed_login( $username ); |
| 178 |
} |
| 179 |
// Only a token newer than every previously consumed token may proceed. |
| 180 |
if ( (int) $row->last_used_at >= $ts ) { |
| 181 |
defined( 'debug' ) && debug( 'dologin easy login already used' . $ts ); |
| 182 |
$this->_error_page( 'dologin_link_used', 410 ); |
| 183 |
} |
| 184 |
|
| 185 |
$user_info = get_userdata( $uid ); |
| 186 |
if ( ! $user_info ) { |
| 187 |
return $this->_failed_login( $username ); |
| 188 |
} |
| 189 |
$username = $user_info->user_login; |
| 190 |
defined( 'debug' ) && debug( 'dologin easy login passed, uid: ' . $uid . ', username: ' . $user_info->user_login ); |
| 191 |
|
| 192 |
$confirm_nonce_action = 'dologin_easy_login_confirm_' . hash( 'sha256', $raw_token ); |
| 193 |
|
| 194 |
// Show login confirm page. |
| 195 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 196 |
if ( empty( $_POST['confirmed'] ) ) { |
| 197 |
require_once DOLOGIN_DIR . 'tpl/easylogin_cfm.tpl.php'; |
| 198 |
exit; |
| 199 |
} |
| 200 |
|
| 201 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 202 |
$confirm_nonce = empty( $_POST['dologin_confirm_nonce'] ) || ! is_string( $_POST['dologin_confirm_nonce'] ) ? '' : sanitize_text_field( wp_unslash( $_POST['dologin_confirm_nonce'] ) ); |
| 203 |
if ( ! wp_verify_nonce( $confirm_nonce, $confirm_nonce_action ) ) { |
| 204 |
return $this->_failed_login( $username ); |
| 205 |
} |
| 206 |
|
| 207 |
// Can login, update record first. |
| 208 |
$q = "UPDATE `$this->_tb` SET last_used_at=%d, count=count+1 WHERE id=%d AND active=1 AND last_used_at<%d"; |
| 209 |
// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; values are prepared. |
| 210 |
$updated = $wpdb->query( $wpdb->prepare( $q, array( $ts, $row->id, $ts ) ) ); |
| 211 |
if ( 1 !== $updated ) { |
| 212 |
$this->_error_page( 'dologin_link_used', 410 ); |
| 213 |
} |
| 214 |
|
| 215 |
// Login. |
| 216 |
wp_set_current_user( $user_info->ID ); |
| 217 |
wp_set_auth_cookie( $user_info->ID, false ); |
| 218 |
// phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- firing the WordPress core hook on programmatic login. |
| 219 |
do_action( 'wp_login', $user_info->user_login, $user_info ); |
| 220 |
|
| 221 |
nocache_headers(); |
| 222 |
|
| 223 |
Router::redirect( admin_url() ); |
| 224 |
} |
| 225 |
|
| 226 |
/** |
| 227 |
* Build the canonical easy-login assertion string. |
| 228 |
*/ |
| 229 |
private function _easy_login_claims_json( $claims ) { |
| 230 |
if ( ! is_array( $claims ) ) { |
| 231 |
return false; |
| 232 |
} |
| 233 |
$required = array( 'v', 'uid', 'pk', 'aud', 'iat', 'jti' ); |
| 234 |
$keys = array_keys( $claims ); |
| 235 |
sort( $keys, SORT_STRING ); |
| 236 |
$sorted_required = $required; |
| 237 |
sort( $sorted_required, SORT_STRING ); |
| 238 |
if ( $keys !== $sorted_required |
| 239 |
|| ! is_int( $claims['v'] ) || 2 !== $claims['v'] |
| 240 |
|| ! is_int( $claims['uid'] ) || $claims['uid'] <= 0 |
| 241 |
|| ! is_string( $claims['pk'] ) || '' === $claims['pk'] |
| 242 |
|| ! is_string( $claims['aud'] ) || '' === $claims['aud'] |
| 243 |
|| ! is_int( $claims['iat'] ) || $claims['iat'] <= 0 |
| 244 |
|| ! is_string( $claims['jti'] ) || ! preg_match( '/^[a-f0-9]{32}$/D', $claims['jti'] ) ) { |
| 245 |
return false; |
| 246 |
} |
| 247 |
|
| 248 |
return wp_json_encode( |
| 249 |
array( |
| 250 |
'v' => 2, |
| 251 |
'uid' => $claims['uid'], |
| 252 |
'pk' => $claims['pk'], |
| 253 |
'aud' => $claims['aud'], |
| 254 |
'iat' => $claims['iat'], |
| 255 |
'jti' => $claims['jti'], |
| 256 |
) |
| 257 |
); |
| 258 |
} |
| 259 |
|
| 260 |
/** |
| 261 |
* Decode and strictly validate a versioned easy-login token. |
| 262 |
*/ |
| 263 |
private function _decode_easy_login_token( $raw_token ) { |
| 264 |
if ( ! is_string( $raw_token ) || '' === $raw_token || strlen( $raw_token ) > 16384 ) { |
| 265 |
return false; |
| 266 |
} |
| 267 |
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode -- benign base64 decoding of the easy-login token payload. |
| 268 |
$decoded = base64_decode( $raw_token, true ); |
| 269 |
$token = false === $decoded ? null : json_decode( $decoded, true ); |
| 270 |
if ( ! is_array( $token ) || array( 'claims', 'sig' ) !== array_keys( $token ) || ! is_array( $token['claims'] ) || ! is_string( $token['sig'] ) || '' === $token['sig'] ) { |
| 271 |
return false; |
| 272 |
} |
| 273 |
$claims_json = $this->_easy_login_claims_json( $token['claims'] ); |
| 274 |
if ( ! $claims_json ) { |
| 275 |
return false; |
| 276 |
} |
| 277 |
$token['claims_json'] = $claims_json; |
| 278 |
return $token; |
| 279 |
} |
| 280 |
|
| 281 |
/** |
| 282 |
* Normalize the target admin URL used as the signed token audience. |
| 283 |
*/ |
| 284 |
private function _easy_login_audience( $url ) { |
| 285 |
$url = is_string( $url ) ? esc_url_raw( $url ) : ''; |
| 286 |
if ( ! $url || ! wp_http_validate_url( $url ) ) { |
| 287 |
return ''; |
| 288 |
} |
| 289 |
$parts = wp_parse_url( $url ); |
| 290 |
if ( ! is_array( $parts ) || empty( $parts['scheme'] ) || empty( $parts['host'] ) || isset( $parts['user'] ) || isset( $parts['pass'] ) ) { |
| 291 |
return ''; |
| 292 |
} |
| 293 |
$scheme = strtolower( $parts['scheme'] ); |
| 294 |
if ( ! in_array( $scheme, array( 'http', 'https' ), true ) ) { |
| 295 |
return ''; |
| 296 |
} |
| 297 |
$host = strtolower( $parts['host'] ); |
| 298 |
$port = isset( $parts['port'] ) ? ':' . (int) $parts['port'] : ''; |
| 299 |
$path = isset( $parts['path'] ) ? '/' . trim( $parts['path'], '/' ) . '/' : '/'; |
| 300 |
return $scheme . '://' . $host . $port . $path; |
| 301 |
} |
| 302 |
|
| 303 |
/** |
| 304 |
* Note failed login |
| 305 |
* |
| 306 |
* @since 4.0 |
| 307 |
*/ |
| 308 |
private function _failed_login( $username ) { |
| 309 |
defined( 'debug' ) && debug( 'Failed to auth as user: ', $username ); |
| 310 |
// phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- firing the WordPress core hook. |
| 311 |
do_action( 'wp_login_failed', $username ); |
| 312 |
$this->_error_page( 'dologin_link_invalid', 403 ); |
| 313 |
} |
| 314 |
|
| 315 |
/** |
| 316 |
* Complete a rejected public token request with a localized page. |
| 317 |
*/ |
| 318 |
private function _error_page( $tag, $status_code ) { |
| 319 |
GUI::error_page( $tag, $status_code ); |
| 320 |
exit; |
| 321 |
} |
| 322 |
|
| 323 |
/** |
| 324 |
* Queue a localized error for a nonce- and capability-gated admin action. |
| 325 |
*/ |
| 326 |
private function _admin_error( $tag ) { |
| 327 |
GUI::error( Lang::msg( $tag ) ); |
| 328 |
} |
| 329 |
|
| 330 |
/** |
| 331 |
* Lock |
| 332 |
* |
| 333 |
* @since 4.0 |
| 334 |
*/ |
| 335 |
private function _lock_link() { |
| 336 |
global $wpdb; |
| 337 |
|
| 338 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 339 |
$pid = empty( $_GET['dologin_id'] ) ? 0 : (int) $_GET['dologin_id']; |
| 340 |
if ( $pid <= 0 ) { |
| 341 |
return; |
| 342 |
} |
| 343 |
|
| 344 |
$q = "UPDATE `$this->_tb` SET active = ( active + 1 ) % 2 WHERE id = %d"; |
| 345 |
// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; id is prepared. |
| 346 |
$wpdb->query( $wpdb->prepare( $q, $pid ) ); |
| 347 |
} |
| 348 |
|
| 349 |
/** |
| 350 |
* Delete |
| 351 |
* |
| 352 |
* @since 4.0 |
| 353 |
*/ |
| 354 |
public function del_link( $pid = false ) { |
| 355 |
global $wpdb; |
| 356 |
|
| 357 |
if ( ! $pid ) { |
| 358 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 359 |
if ( empty( $_GET['dologin_id'] ) ) { |
| 360 |
return; |
| 361 |
} |
| 362 |
|
| 363 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 364 |
$pid = (int) $_GET['dologin_id']; |
| 365 |
} |
| 366 |
|
| 367 |
$pid = (int) $pid; |
| 368 |
if ( $pid <= 0 ) { |
| 369 |
return; |
| 370 |
} |
| 371 |
|
| 372 |
$q = "DELETE FROM `$this->_tb` WHERE id = %d"; |
| 373 |
// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; id is prepared. |
| 374 |
$wpdb->query( $wpdb->prepare( $q, $pid ) ); |
| 375 |
} |
| 376 |
|
| 377 |
/** |
| 378 |
* Generate a new connection token |
| 379 |
* |
| 380 |
* @since 4.0 |
| 381 |
* @access public |
| 382 |
*/ |
| 383 |
public function gen_token( $uid, $return_url = false ) { |
| 384 |
global $wpdb; |
| 385 |
if ( ! $this->_sodium_ready() ) { |
| 386 |
if ( $return_url ) { |
| 387 |
return 'Sodium cryptography support is required'; |
| 388 |
} |
| 389 |
GUI::error( __( 'Sodium cryptography support is required.', 'dologin' ) ); |
| 390 |
Router::redirect( admin_url( 'options-general.php?page=dologin' ) ); |
| 391 |
} |
| 392 |
|
| 393 |
$this->cls( 'Data' )->tb_create( 'site' ); |
| 394 |
|
| 395 |
$uid = (int) $uid; |
| 396 |
$user_info = $uid > 0 ? get_userdata( $uid ) : false; |
| 397 |
if ( ! $user_info ) { |
| 398 |
if ( $return_url ) { |
| 399 |
return 'Invalid User ID'; |
| 400 |
} |
| 401 |
Router::redirect( admin_url( 'options-general.php?page=dologin' ) ); |
| 402 |
} |
| 403 |
|
| 404 |
$token = s::rrand( 32 ); |
| 405 |
$hash = Secret::token_hash( 'site-connection', $token ); |
| 406 |
if ( ! $hash ) { |
| 407 |
if ( $return_url ) { |
| 408 |
return false; |
| 409 |
} |
| 410 |
wp_die( esc_html__( 'Failed to protect the site connection token.', 'dologin' ) ); |
| 411 |
} |
| 412 |
|
| 413 |
$q = "INSERT INTO `$this->_tb` SET user_id = %d, user_name = %s, hash = %s, dateline = %d, active=1,is_child=1"; |
| 414 |
// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; values are prepared. |
| 415 |
$inserted = $wpdb->query( $wpdb->prepare( $q, array( $uid, $user_info->user_login, $hash, time() ) ) ); |
| 416 |
$id = $wpdb->insert_id; |
| 417 |
if ( 1 !== $inserted || $id <= 0 ) { |
| 418 |
if ( $return_url ) { |
| 419 |
return false; |
| 420 |
} |
| 421 |
wp_die( esc_html__( 'Failed to save the site connection token.', 'dologin' ) ); |
| 422 |
} |
| 423 |
|
| 424 |
$link = admin_url( '?' . self::QS_NAME_ROOT_AUTH . '=' . $id . '.' . $token ); |
| 425 |
if ( $return_url ) { |
| 426 |
return $link; |
| 427 |
} |
| 428 |
|
| 429 |
$this->show_generated_connection_token( base64_encode( $link ) ); |
| 430 |
} |
| 431 |
|
| 432 |
/** |
| 433 |
* Display a newly generated connection token once without storing its raw secret. |
| 434 |
*/ |
| 435 |
private function show_generated_connection_token( $token ) { |
| 436 |
$back = admin_url( 'options-general.php?page=dologin' ); |
| 437 |
$message = '<p>' . esc_html__( 'Copy this child-site connection token now. For database-leak protection, its secret value is not stored and cannot be shown again.', 'dologin' ) . '</p>' |
| 438 |
. '<p><code style="display:block;overflow-wrap:anywhere;padding:12px;">' . esc_html( $token ) . '</code></p>' |
| 439 |
. '<p><a class="button button-primary" href="' . esc_url( $back ) . '">' . esc_html__( 'Continue to Site Connections', 'dologin' ) . '</a></p>'; |
| 440 |
wp_die( $message, esc_html__( 'Site Connection Token Created', 'dologin' ), array( 'response' => 200 ) ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- every dynamic value in the assembled admin-only message is escaped above. |
| 441 |
} |
| 442 |
|
| 443 |
/** |
| 444 |
* Init PK/SK |
| 445 |
* |
| 446 |
* @since 4.0 |
| 447 |
*/ |
| 448 |
private function _init_pksk() { |
| 449 |
if ( ! $this->_sodium_ready() ) { |
| 450 |
return false; |
| 451 |
} |
| 452 |
if ( Conf::val( '_pk' ) && Conf::val( '_sk' ) ) { |
| 453 |
return false; |
| 454 |
} |
| 455 |
|
| 456 |
defined( 'debug' ) && debug( 'Generate new PK/SK' ); |
| 457 |
|
| 458 |
$keypair = sodium_crypto_sign_keypair(); |
| 459 |
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode -- benign base64 encoding of an ed25519 public key. |
| 460 |
$pk = base64_encode( sodium_crypto_sign_publickey( $keypair ) ); |
| 461 |
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode -- benign base64 encoding of an ed25519 secret key. |
| 462 |
$sk = base64_encode( sodium_crypto_sign_secretkey( $keypair ) ); |
| 463 |
$sealed = Secret::seal( 'site-easy-login-signing-key', $sk ); |
| 464 |
if ( ! $sealed ) { |
| 465 |
return false; |
| 466 |
} |
| 467 |
Conf::update( '_pk', $pk ); |
| 468 |
Conf::update( '_sk', $sealed ); |
| 469 |
return true; |
| 470 |
} |
| 471 |
|
| 472 |
/** |
| 473 |
* Sign a msg w/ SK |
| 474 |
* |
| 475 |
* @since 4.0 |
| 476 |
* @access public |
| 477 |
*/ |
| 478 |
private function _pack_b64sign( $msg ) { |
| 479 |
$pk = Conf::val( '_pk' ); |
| 480 |
$stored_sk = Conf::val( '_sk' ); |
| 481 |
if ( ! $pk || ! $stored_sk || ! $this->_sodium_ready() ) { |
| 482 |
return false; |
| 483 |
} |
| 484 |
if ( Secret::is_sealed( $stored_sk ) ) { |
| 485 |
$sk = Secret::open( 'site-easy-login-signing-key', $stored_sk ); |
| 486 |
} else { |
| 487 |
$sk = (string) $stored_sk; |
| 488 |
$sealed = Secret::seal( 'site-easy-login-signing-key', $sk ); |
| 489 |
if ( ! $sealed ) { |
| 490 |
return false; |
| 491 |
} |
| 492 |
Conf::update( '_sk', $sealed ); |
| 493 |
} |
| 494 |
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode -- benign base64 decoding of the stored ed25519 secret key. |
| 495 |
$secret_key = base64_decode( $sk, true ); |
| 496 |
if ( false === $secret_key || strlen( $secret_key ) !== SODIUM_CRYPTO_SIGN_SECRETKEYBYTES ) { |
| 497 |
return false; |
| 498 |
} |
| 499 |
$sign = sodium_crypto_sign( (string) $msg, $secret_key ); |
| 500 |
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode -- benign base64 encoding of the signature. |
| 501 |
return base64_encode( $sign ); |
| 502 |
} |
| 503 |
|
| 504 |
/** |
| 505 |
* Verify a signed msg w/ PK |
| 506 |
* |
| 507 |
* @since 4.0 |
| 508 |
* @access public |
| 509 |
*/ |
| 510 |
private function _unpack_b64sign( $msg, $pk ) { |
| 511 |
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode -- benign base64 decoding of the signed message and public key. |
| 512 |
$signed = base64_decode( $msg, true ); |
| 513 |
$public_key = base64_decode( $pk, true ); |
| 514 |
if ( ! $this->_sodium_ready() || false === $signed || false === $public_key || strlen( $public_key ) !== SODIUM_CRYPTO_SIGN_PUBLICKEYBYTES ) { |
| 515 |
return false; |
| 516 |
} |
| 517 |
return sodium_crypto_sign_open( $signed, $public_key ); |
| 518 |
} |
| 519 |
|
| 520 |
/** |
| 521 |
* Connect a new child site w/ token |
| 522 |
* |
| 523 |
* @since 4.0 |
| 524 |
* @access public |
| 525 |
*/ |
| 526 |
public function connect_site() { |
| 527 |
global $wpdb; |
| 528 |
$this->cls( 'Data' )->tb_create( 'site' ); |
| 529 |
if ( ! $this->_sodium_ready() ) { |
| 530 |
return $this->_admin_error( 'dologin_sodium_unavailable' ); |
| 531 |
} |
| 532 |
|
| 533 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 534 |
if ( empty( $_POST['token'] ) ) { |
| 535 |
return $this->_admin_error( 'dologin_site_token_missing' ); |
| 536 |
} |
| 537 |
|
| 538 |
defined( 'debug' ) && debug( 'connection to child' ); |
| 539 |
|
| 540 |
// Generate pk/sk pair if not yet. |
| 541 |
$this->_init_pksk(); |
| 542 |
|
| 543 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing, WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode -- admin-gated action; benign base64 decode of the connection URL token. |
| 544 |
$token_link = is_string( $_POST['token'] ) ? base64_decode( sanitize_text_field( wp_unslash( $_POST['token'] ) ), true ) : false; |
| 545 |
// Block SSRF to internal/invalid hosts (defense in depth even though this path is manage_options-gated). |
| 546 |
if ( ! wp_http_validate_url( $token_link ) ) { |
| 547 |
return $this->_admin_error( 'dologin_site_token_invalid' ); |
| 548 |
} |
| 549 |
defined( 'debug' ) && debug( 'Validated child site connection token URL.' ); |
| 550 |
// Post to the child site w/ pk. |
| 551 |
$pk = Conf::val( '_pk' ); |
| 552 |
$ts = time(); |
| 553 |
$resp = wp_safe_remote_post( |
| 554 |
$token_link, |
| 555 |
array( |
| 556 |
'body' => array( |
| 557 |
'pk' => $pk, |
| 558 |
'site_url' => site_url(), |
| 559 |
'site_title' => get_bloginfo( 'name' ), |
| 560 |
'sign' => $this->_pack_b64sign( $ts ), |
| 561 |
), |
| 562 |
'timeout' => 15, |
| 563 |
'redirection' => 2, |
| 564 |
'limit_response_size' => 65536, |
| 565 |
'sslverify' => true, |
| 566 |
) |
| 567 |
); |
| 568 |
|
| 569 |
if ( is_wp_error( $resp ) ) { |
| 570 |
$error_message = $resp->get_error_message(); |
| 571 |
defined( 'debug' ) && debug( 'Child site connection request failed:', $error_message ); |
| 572 |
return $this->_admin_error( 'dologin_site_connection_failed' ); |
| 573 |
} |
| 574 |
|
| 575 |
$response_code = (int) wp_remote_retrieve_response_code( $resp ); |
| 576 |
if ( $response_code < 200 || $response_code >= 300 ) { |
| 577 |
defined( 'debug' ) && debug( 'Child site connection returned HTTP status:', $response_code ); |
| 578 |
return $this->_admin_error( 'dologin_site_connection_failed' ); |
| 579 |
} |
| 580 |
|
| 581 |
$res = json_decode( wp_remote_retrieve_body( $resp ), true ); |
| 582 |
if ( empty( $res['status'] ) || 'ok' !== $res['status'] || empty( $res['child_title'] ) || ! is_scalar( $res['child_title'] ) || empty( $res['child_url'] ) || ! is_scalar( $res['child_url'] ) || ! isset( $res['child_user_id'], $res['child_user_name'] ) || ! is_scalar( $res['child_user_id'] ) || ! is_scalar( $res['child_user_name'] ) ) { |
| 583 |
defined( 'debug' ) && debug( 'Child site connection response failed schema validation.' ); |
| 584 |
return $this->_admin_error( 'dologin_site_connection_failed' ); |
| 585 |
} |
| 586 |
$child_url = esc_url_raw( $res['child_url'] ); |
| 587 |
if ( ! wp_http_validate_url( $child_url ) ) { |
| 588 |
return $this->_admin_error( 'dologin_site_connection_failed' ); |
| 589 |
} |
| 590 |
|
| 591 |
$q = "INSERT INTO `$this->_tb` SET title=%s, url=%s, pk=%s, is_child=0, user_id=%d, user_name=%s, dateline=%d, active=1"; |
| 592 |
// phpcs:ignore PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery -- $this->_tb is a hardcoded internal table name; values are prepared. |
| 593 |
$wpdb->query( |
| 594 |
$wpdb->prepare( |
| 595 |
// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared -- $this->_tb is a hardcoded internal table name; values are prepared. |
| 596 |
$q, |
| 597 |
array( |
| 598 |
sanitize_text_field( $res['child_title'] ), |
| 599 |
$child_url, |
| 600 |
'-', |
| 601 |
(int) $res['child_user_id'], |
| 602 |
sanitize_text_field( $res['child_user_name'] ), |
| 603 |
time(), |
| 604 |
) |
| 605 |
) |
| 606 |
); |
| 607 |
} |
| 608 |
|
| 609 |
/** |
| 610 |
* Auth a connection setup from a root site |
| 611 |
* |
| 612 |
* @since 4.0 |
| 613 |
*/ |
| 614 |
public function connect_auth_init() { |
| 615 |
global $wpdb; |
| 616 |
|
| 617 |
$username = 'N/A'; |
| 618 |
|
| 619 |
// This public handshake endpoint must apply the same IP rules and failure limits. |
| 620 |
if ( $this->cls( 'Auth' )->is_ip_denied() ) { |
| 621 |
$this->_error_page( 'dologin_ip_denied', 403 ); |
| 622 |
} |
| 623 |
if ( $this->cls( 'Auth' )->is_rate_limited() ) { |
| 624 |
$this->_error_page( 'dologin_rate_limited', 429 ); |
| 625 |
} |
| 626 |
if ( ! $this->_sodium_ready() ) { |
| 627 |
$this->_error_page( 'dologin_sodium_unavailable', 503 ); |
| 628 |
} |
| 629 |
|
| 630 |
defined( 'debug' ) && debug( 'Root site connection in' ); |
| 631 |
// Server-to-server handshake authenticated by the signed token, not a nonce. |
| 632 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 633 |
$raw_token = isset( $_GET[ self::QS_NAME_ROOT_AUTH ] ) && is_string( $_GET[ self::QS_NAME_ROOT_AUTH ] ) ? sanitize_text_field( wp_unslash( $_GET[ self::QS_NAME_ROOT_AUTH ] ) ) : ''; |
| 634 |
$info = explode( '.', $raw_token ); |
| 635 |
if ( 2 !== count( $info ) || empty( $info[0] ) || empty( $info[1] ) ) { |
| 636 |
return $this->_failed_login( $username ); |
| 637 |
} |
| 638 |
|
| 639 |
$pid = (int) $info[0]; |
| 640 |
if ( $pid <= 0 ) { |
| 641 |
return $this->_failed_login( $username ); |
| 642 |
} |
| 643 |
|
| 644 |
// Verify reord. |
| 645 |
// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; id is prepared. |
| 646 |
$row = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM `$this->_tb` WHERE id = %d", $pid ) ); |
| 647 |
if ( ! $row ) { |
| 648 |
return $this->_failed_login( $username ); |
| 649 |
} |
| 650 |
$user_info = get_userdata( $row->user_id ); |
| 651 |
if ( ! $user_info ) { |
| 652 |
return $this->_failed_login( $username ); |
| 653 |
} |
| 654 |
$username = $user_info->user_login; |
| 655 |
if ( ! Secret::verify_token( 'site-connection', (string) $info[1], (string) $row->hash ) ) { |
| 656 |
return $this->_failed_login( $username ); |
| 657 |
} |
| 658 |
if ( $row->active != 1 || $row->is_child != 1 || $row->pk ) { |
| 659 |
defined( 'debug' ) && debug( 'Invalid token record' ); |
| 660 |
$this->_error_page( 'dologin_invalid_token_record', 403 ); |
| 661 |
} |
| 662 |
|
| 663 |
if ( time() - $row->dateline > 3600 ) { |
| 664 |
defined( 'debug' ) && debug( 'Token expired' ); |
| 665 |
$this->_error_page( 'dologin_token_expired', 410 ); |
| 666 |
} |
| 667 |
|
| 668 |
// Verify root site info. |
| 669 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 670 |
$root_url = isset( $_POST['site_url'] ) && is_string( $_POST['site_url'] ) ? esc_url_raw( wp_unslash( $_POST['site_url'] ) ) : ''; |
| 671 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 672 |
$root_title = isset( $_POST['site_title'] ) && is_string( $_POST['site_title'] ) ? sanitize_text_field( wp_unslash( $_POST['site_title'] ) ) : ''; |
| 673 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 674 |
$root_pk = isset( $_POST['pk'] ) && is_string( $_POST['pk'] ) ? sanitize_text_field( wp_unslash( $_POST['pk'] ) ) : ''; |
| 675 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 676 |
$sign = isset( $_POST['sign'] ) && is_string( $_POST['sign'] ) ? sanitize_text_field( wp_unslash( $_POST['sign'] ) ) : ''; |
| 677 |
$root_scheme = wp_parse_url( $root_url, PHP_URL_SCHEME ); |
| 678 |
if ( ! $root_url || ! in_array( $root_scheme, array( 'http', 'https' ), true ) || ! $root_title || ! $root_pk || ! $sign ) { |
| 679 |
defined( 'debug' ) && debug( 'Invalid dologin connect root data' ); |
| 680 |
$this->_error_page( 'dologin_site_token_invalid', 403 ); |
| 681 |
} |
| 682 |
$signed_ts = $this->_unpack_b64sign( $sign, $root_pk ); |
| 683 |
if ( ! is_string( $signed_ts ) || ! preg_match( '/^[0-9]+$/D', $signed_ts ) || (int) $signed_ts < time() - 3600 || (int) $signed_ts > time() + 300 ) { // Root and child site clocks cannot be materially out of sync. |
| 684 |
defined( 'debug' ) && debug( 'dologin connect root clock should not diff w/ child more than 1 hour' ); |
| 685 |
$this->_error_page( 'dologin_site_clock_mismatch', 403 ); |
| 686 |
} |
| 687 |
if ( $root_url == site_url() ) { |
| 688 |
defined( 'debug' ) && debug( 'dologin connect root site url same as child' ); |
| 689 |
$this->_error_page( 'dologin_site_same_url', 409 ); |
| 690 |
} |
| 691 |
// Only one record allowed per root site pk per user_id. |
| 692 |
// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; values are prepared. |
| 693 |
$exists = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM `$this->_tb` WHERE pk = %s AND user_id = %d", $root_pk, $row->user_id ) ); |
| 694 |
if ( $exists > 0 ) { |
| 695 |
defined( 'debug' ) && debug( 'dologin connect root site pk already exists for user' ); |
| 696 |
$this->_error_page( 'dologin_site_already_connected', 409 ); |
| 697 |
} |
| 698 |
|
| 699 |
// Can login, update record first. |
| 700 |
$q = "UPDATE `$this->_tb` SET title=%s,url=%s,pk=%s WHERE id = %d AND pk = '' AND active = 1"; |
| 701 |
// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared, PluginCheck.Security.DirectDB.UnescapedDBParameter, WordPress.DB.DirectDatabaseQuery --$this->_tb is a hardcoded internal table name; values are prepared. |
| 702 |
$updated = $wpdb->query( $wpdb->prepare( $q, array( $root_title, $root_url, $root_pk, $pid ) ) ); |
| 703 |
if ( 1 !== $updated ) { |
| 704 |
$this->_error_page( 'dologin_token_used', 410 ); |
| 705 |
} |
| 706 |
|
| 707 |
nocache_headers(); |
| 708 |
|
| 709 |
exit( |
| 710 |
wp_json_encode( |
| 711 |
array( |
| 712 |
'status' => 'ok', |
| 713 |
'child_title' => get_bloginfo( 'name' ), |
| 714 |
'child_url' => admin_url(), |
| 715 |
'child_user_id' => $row->user_id, |
| 716 |
'child_user_name' => $username, |
| 717 |
) |
| 718 |
) |
| 719 |
); |
| 720 |
} |
| 721 |
|
| 722 |
/** |
| 723 |
* Handler |
| 724 |
* |
| 725 |
* @since 1.4 |
| 726 |
*/ |
| 727 |
public function handler() { |
| 728 |
$type = Router::verify_type(); |
| 729 |
|
| 730 |
switch ( $type ) { |
| 731 |
case self::TYPE_GEN_TOKEN: |
| 732 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 733 |
$this->gen_token( isset( $_GET['uid'] ) ? (int) $_GET['uid'] : 0 ); |
| 734 |
break; |
| 735 |
|
| 736 |
case self::TYPE_CONNECT: |
| 737 |
$this->connect_site(); |
| 738 |
break; |
| 739 |
|
| 740 |
case self::TYPE_EASY_LOGIN: |
| 741 |
$this->_easy_login(); |
| 742 |
break; |
| 743 |
|
| 744 |
case self::TYPE_LOCK: |
| 745 |
$this->_lock_link(); |
| 746 |
break; |
| 747 |
|
| 748 |
case self::TYPE_DEL: |
| 749 |
$this->del_link(); |
| 750 |
break; |
| 751 |
|
| 752 |
default: |
| 753 |
break; |
| 754 |
} |
| 755 |
} |
| 756 |
} |
| 757 |
|
