| 1 |
<?php |
| 2 |
/** |
| 3 |
* AWS s3 style Presigned URL (AWS SigV4-inspired) |
| 4 |
* |
| 5 |
* Usage: |
| 6 |
* $signer = new UrlPresigner(KEY_ID, SECRET, 'auto', 'storeengine'); |
| 7 |
* $url = $signer->generateUrl('https://example.com/secure-downloads/file.zip', 300, 'GET'); |
| 8 |
* |
| 9 |
* // In your download endpoint (front controller), call: |
| 10 |
* $ok = $signer->validateCurrentRequest(); |
| 11 |
* if ($ok) { ... serve file ... } else { http_response_code(403); exit; } |
| 12 |
*/ |
| 13 |
|
| 14 |
namespace StoreEngine\Classes; |
| 15 |
|
| 16 |
use StoreEngine\Classes\Exceptions\StoreEngineException; |
| 17 |
use StoreEngine\Utils\Constants; |
| 18 |
use StoreEngine\Utils\Helper; |
| 19 |
use WP_Error; |
| 20 |
|
| 21 |
if ( ! defined( 'ABSPATH' ) ) { |
| 22 |
exit; |
| 23 |
} |
| 24 |
|
| 25 |
class UrlPresigner { |
| 26 |
|
| 27 |
private const OPTION_NAME = 'storeengine_url_presigner_keys'; |
| 28 |
|
| 29 |
private ?string $keyId; |
| 30 |
private ?string $secret; |
| 31 |
|
| 32 |
private ?string $payload_hash; |
| 33 |
private string $region; |
| 34 |
private string $service; |
| 35 |
private int $maxSkewSeconds; |
| 36 |
|
| 37 |
protected static $instance; |
| 38 |
|
| 39 |
public static function init() { |
| 40 |
return self::get_instance(); |
| 41 |
} |
| 42 |
|
| 43 |
public static function get_instance() { |
| 44 |
if ( null === self::$instance ) { |
| 45 |
self::$instance = new self(); |
| 46 |
} |
| 47 |
|
| 48 |
return self::$instance; |
| 49 |
} |
| 50 |
|
| 51 |
/** |
| 52 |
* Singleton constructor. |
| 53 |
* |
| 54 |
* @throws Exceptions\StoreEngineException |
| 55 |
*/ |
| 56 |
protected function __construct() { |
| 57 |
$this->maxSkewSeconds = 300; // ±5 minutes clock skew |
| 58 |
$this->region = 'auto'; |
| 59 |
$this->service = 'storeengine'; |
| 60 |
$this->payload_hash = Constants::get_constant( 'SE_URL_PRE_SIGNER_PAYLOAD_HASH' ) ?? Constants::get_constant( 'SECURE_AUTH_KEY' ); |
| 61 |
|
| 62 |
if ( Constants::get_constant( 'SE_URL_PRE_SIGNER_KEY' ) && Constants::get_constant( 'SE_URL_PRE_SIGNER_SECRET' ) ) { |
| 63 |
$this->keyId = Constants::get_constant( 'SE_URL_PRE_SIGNER_KEY' ); |
| 64 |
$this->secret = Constants::get_constant( 'SE_URL_PRE_SIGNER_SECRET' ); |
| 65 |
} else { |
| 66 |
// Get Keys. |
| 67 |
$keys = static::getKeys(); |
| 68 |
|
| 69 |
// Changing below payload hash will invalidate previously signed URLs. |
| 70 |
$this->keyId = $keys['active']['id']; |
| 71 |
$this->secret = $keys['active']['secret']; |
| 72 |
|
| 73 |
add_action( 'init', function () { |
| 74 |
// Schedule security key rotation. |
| 75 |
add_action( 'storeengine/url_presigner/rotate_keys', [ __CLASS__, 'rotateKeys' ] ); |
| 76 |
add_action( 'storeengine/url_presigner/cleanup_keys', [ __CLASS__, 'cleanupKeys' ] ); |
| 77 |
|
| 78 |
if ( ! \StoreEngine::init()->queue()->get_next( 'storeengine/url_presigner/rotate_keys', null, 'url_presigner' ) ) { |
| 79 |
\StoreEngine::init()->queue()->schedule_cron( time(), '0 0 1 * *', 'storeengine/url_presigner/rotate_keys', [], 'url_presigner' ); |
| 80 |
} |
| 81 |
} ); |
| 82 |
} |
| 83 |
|
| 84 |
if ( ! $this->payload_hash ) { |
| 85 |
throw new StoreEngineException( esc_html__( 'Secure URL presigning payload hash key is not defined.', 'storeengine' ), 'payload-pre-signing-hash-missing' ); |
| 86 |
} |
| 87 |
|
| 88 |
if ( ! $this->keyId || ! $this->secret ) { |
| 89 |
throw new StoreEngineException( esc_html__( 'Secure URL presigning key-id & secret is not defined.', 'storeengine' ), 'payload-pre-signing-hash-missing' ); |
| 90 |
} |
| 91 |
} |
| 92 |
|
| 93 |
protected static function getKeys(): array { |
| 94 |
$keys = get_option( self::OPTION_NAME, [] ); |
| 95 |
|
| 96 |
if ( empty( $keys ) ) { |
| 97 |
$keys = [ |
| 98 |
'active' => self::generateKeys(), |
| 99 |
'previous' => null, |
| 100 |
]; |
| 101 |
|
| 102 |
update_option( self::OPTION_NAME, $keys, false ); |
| 103 |
} |
| 104 |
|
| 105 |
return wp_parse_args( $keys, [ |
| 106 |
'active' => null, |
| 107 |
'previous' => null, |
| 108 |
] ); |
| 109 |
} |
| 110 |
|
| 111 |
protected static function generateKeys(): array { |
| 112 |
return [ |
| 113 |
'id' => 'SE-KI-X-' . wp_generate_password( 20, false, false ), |
| 114 |
'secret' => wp_generate_password( 64, true, true ), |
| 115 |
'created_at' => time(), |
| 116 |
]; |
| 117 |
} |
| 118 |
|
| 119 |
public static function rotateKeys() { |
| 120 |
$keys = self::getKeys(); |
| 121 |
|
| 122 |
// Move current active -> previous |
| 123 |
if ( ! empty( $keys['active'] ) ) { |
| 124 |
$keys['previous'] = $keys['active']; |
| 125 |
} |
| 126 |
|
| 127 |
// Generate new active |
| 128 |
$keys['active'] = static::generateKeys(); |
| 129 |
|
| 130 |
update_option( self::OPTION_NAME, $keys, false ); |
| 131 |
|
| 132 |
// Cleanup previous-key after 10 minutes. |
| 133 |
if ( ! \StoreEngine::init()->queue()->get_next( 'storeengine/url_presigner/cleanup_keys', null, 'url_presigner' ) ) { |
| 134 |
\StoreEngine::init()->queue()->schedule_single( time() + ( 10 * MINUTE_IN_SECONDS ), 'storeengine/url_presigner/cleanup_keys', [], 'url_presigner' ); |
| 135 |
} |
| 136 |
} |
| 137 |
|
| 138 |
/** |
| 139 |
* Cleanup old keys (remove previous if expired). |
| 140 |
*/ |
| 141 |
public static function cleanupKeys(): void { |
| 142 |
$keys = self::getKeys(); |
| 143 |
$keys['previous'] = null; |
| 144 |
|
| 145 |
update_option( self::OPTION_NAME, $keys, false ); |
| 146 |
} |
| 147 |
|
| 148 |
/** |
| 149 |
* Generate a pre-signed URL. |
| 150 |
* |
| 151 |
* @param string $url Absolute URL you’ll serve from (scheme+host+path). |
| 152 |
* @param int $expiresIn Seconds from now (e.g., 300). Expire below `maxSkewSeconds` will not work. |
| 153 |
* @param string $method GET/HEAD (avoid POST/PUT for downloads). |
| 154 |
* @param array $headers Associative array of extra headers to sign (lowercase keys). e.g. ['x-se-user'=>'123'] |
| 155 |
* @param string|null $pinIp Optional IP to bind the URL to (signed as X-SE-IP). |
| 156 |
*/ |
| 157 |
public function signUrl( string $url, int $expiresIn = 300, string $method = 'GET', array $headers = [], ?string $pinIp = null ): string { |
| 158 |
$parsed = $this->parseUrlStrict( $url ); |
| 159 |
|
| 160 |
$now = current_time( 'Ymd\THis\Z', 1 ); |
| 161 |
$date = substr( $now, 0, 8 ); // Ymd |
| 162 |
$scope = $this->credentialScope( $date ); |
| 163 |
$qs = $this->parseQuery( $parsed['query'] ?? '' ); |
| 164 |
|
| 165 |
// Required SE query params (AWS-like) |
| 166 |
$qs['X-SE-Algorithm'] = 'SE-HMAC-SHA256'; |
| 167 |
$qs['X-SE-Credential'] = rawurlencode( $this->keyId . '/' . $scope ); |
| 168 |
$qs['X-SE-Date'] = $now; |
| 169 |
$qs['X-SE-Expires'] = (string) max( 1, (int) $expiresIn ); |
| 170 |
//$qs['X-SE-SignedHeaders'] = 'host'; |
| 171 |
|
| 172 |
if ( $pinIp ) { |
| 173 |
$qs['X-SE-IP'] = $pinIp; |
| 174 |
} |
| 175 |
|
| 176 |
// Canonical headers (we sign host by default; you can add more) |
| 177 |
$signedHeaders = [ 'host' => strtolower( $parsed['host'] ) ]; |
| 178 |
foreach ( $headers as $k => $v ) { |
| 179 |
$k = strtolower( $k ); |
| 180 |
$signedHeaders[ $k ] = trim( (string) $v ); |
| 181 |
} |
| 182 |
$qs['X-SE-SignedHeaders'] = implode( ';', array_keys( $signedHeaders ) ); |
| 183 |
|
| 184 |
// Build canonical request |
| 185 |
$canonicalRequest = $this->canonicalRequest( |
| 186 |
strtoupper( $method ), |
| 187 |
$this->canonicalUri( $parsed['path'] ?? '/' ), |
| 188 |
$this->canonicalQuery( $qs, /*excludeSig*/ true ), |
| 189 |
$this->canonicalHeaders( $signedHeaders ), |
| 190 |
implode( ';', array_keys( $signedHeaders ) ) |
| 191 |
); |
| 192 |
|
| 193 |
// String to sign |
| 194 |
$stringToSign = $this->stringToSign( $now, $scope, $canonicalRequest ); |
| 195 |
|
| 196 |
// Signature |
| 197 |
$signingKey = $this->deriveSigningKey( $date ); |
| 198 |
$signature = hash_hmac( 'sha256', $stringToSign, $signingKey ); |
| 199 |
|
| 200 |
$qs['X-SE-Signature'] = $signature; |
| 201 |
|
| 202 |
// Rebuild URL |
| 203 |
return $parsed['scheme'] . '://' . $parsed['host'] |
| 204 |
. ( isset( $parsed['port'] ) ? ':' . $parsed['port'] : '' ) |
| 205 |
. $this->canonicalUri( $parsed['path'] ?? '/' ) |
| 206 |
. '?' . $this->canonicalQuery( $qs, /*excludeSig*/ false ); |
| 207 |
} |
| 208 |
|
| 209 |
/** |
| 210 |
* Validate the current HTTP request against the signature. |
| 211 |
* Call this from your secure download endpoint before serving the file. |
| 212 |
*/ |
| 213 |
public function validateCurrentRequest() { |
| 214 |
// Build target URL from current request. |
| 215 |
$scheme = ( ! empty( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] !== 'off' ) ? 'https' : 'http'; |
| 216 |
$host = wp_unslash( $_SERVER['HTTP_HOST'] ?? 'localhost' ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized |
| 217 |
// Strip fragment |
| 218 |
$uri = strtok( wp_unslash( $_SERVER['REQUEST_URI'] ?? '/' ), '#' ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized |
| 219 |
$method = wp_unslash( $_SERVER['REQUEST_METHOD'] ?? 'GET' ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized |
| 220 |
$parsed = $this->parseUrlStrict( $scheme . '://' . $host . $uri ); |
| 221 |
$qs = $this->parseQuery( $parsed['query'] ?? '' ); |
| 222 |
|
| 223 |
// Required Query Params. |
| 224 |
$params = [ |
| 225 |
'X-SE-Algorithm', |
| 226 |
'X-SE-Credential', |
| 227 |
'X-SE-Date', |
| 228 |
'X-SE-Expires', |
| 229 |
'X-SE-SignedHeaders', |
| 230 |
'X-SE-Signature', |
| 231 |
]; |
| 232 |
|
| 233 |
// Required params |
| 234 |
foreach ( $params as $param ) { |
| 235 |
if ( ! isset( $qs[ $param ] ) ) { |
| 236 |
return new WP_Error( 'missing-sig-params', __( 'This download link is no longer valid.', 'storeengine' ) ); |
| 237 |
} |
| 238 |
} |
| 239 |
|
| 240 |
if ( $qs['X-SE-Algorithm'] !== 'SE-HMAC-SHA256' ) { |
| 241 |
return new WP_Error( 'invalid-sig-algo', __( 'This download link is no longer valid.', 'storeengine' ) ); |
| 242 |
} |
| 243 |
|
| 244 |
// Check expiration & clock skew |
| 245 |
$requestTime = $this->parseAmzDatetime( $qs['X-SE-Date'] ); // returns UNIX timestamp |
| 246 |
if ( $requestTime === null ) { |
| 247 |
return new WP_Error( 'missing-sig-date', __( 'This download link is no longer valid.', 'storeengine' ) ); |
| 248 |
} |
| 249 |
|
| 250 |
$expiresIn = (int) $qs['X-SE-Expires']; |
| 251 |
$now = time(); |
| 252 |
|
| 253 |
if ( ( $now + $this->maxSkewSeconds ) > ( $requestTime + $expiresIn ) ) { |
| 254 |
// expired |
| 255 |
return new WP_Error( 'url-expired', __( 'Download link has expired. Please request a new one.', 'storeengine' ) ); |
| 256 |
} |
| 257 |
|
| 258 |
if ( ( $requestTime - $this->maxSkewSeconds ) > $now ) { |
| 259 |
// signed in the future beyond skew |
| 260 |
return new WP_Error( 'url-expired', __( 'Download link has expired. Please request a new one.', 'storeengine' ) ); |
| 261 |
} |
| 262 |
|
| 263 |
// Optional IP pinning |
| 264 |
if ( ! empty( $qs['X-SE-IP'] ) ) { |
| 265 |
$clientIp = Helper::get_user_ip(); |
| 266 |
if ( $clientIp !== $qs['X-SE-IP'] ) { |
| 267 |
return new WP_Error( 'invalid-remote-ip', sprintf( |
| 268 |
// translators: %s. User's IP (REMOTE_ADDR/HTTP_X_REAL_IP); |
| 269 |
__( 'Access denied from this location (%s).', 'storeengine' ), |
| 270 |
$clientIp |
| 271 |
) ); |
| 272 |
} |
| 273 |
} |
| 274 |
|
| 275 |
// Validate credential scope date/region/service |
| 276 |
$credential = rawurldecode( $qs['X-SE-Credential'] ); |
| 277 |
// expected format: <keyId>/<date>/<region>/<service>/SE-Secure-Request |
| 278 |
$parts = explode( '/', $credential ); |
| 279 |
|
| 280 |
if ( count( $parts ) !== 5 || $parts[0] !== $this->keyId || $parts[4] !== 'SE-Secure-Request' ) { |
| 281 |
return new WP_Error( 'sig-parts-mismatched', __( 'This download link is no longer valid.', 'storeengine' ) ); |
| 282 |
} |
| 283 |
|
| 284 |
[ $keyId, $date, $region, $service, $term ] = $parts; |
| 285 |
|
| 286 |
if ( $region !== $this->region || $service !== $this->service ) { |
| 287 |
return new WP_Error( 'invalid-sig-service-region', __( 'This download link is no longer valid.', 'storeengine' ) ); |
| 288 |
} |
| 289 |
|
| 290 |
|
| 291 |
// Rebuild signed headers from request |
| 292 |
$signedHeaderNames = explode( ';', strtolower( $qs['X-SE-SignedHeaders'] ) ); |
| 293 |
$signedHeaders = []; |
| 294 |
|
| 295 |
foreach ( $signedHeaderNames as $h ) { |
| 296 |
if ( $h === '' ) { |
| 297 |
continue; |
| 298 |
} |
| 299 |
if ( $h === 'host' ) { |
| 300 |
$signedHeaders['host'] = strtolower( $parsed['host'] ); |
| 301 |
} else { |
| 302 |
// Pull from HTTP_* server vars |
| 303 |
$key = 'HTTP_' . strtoupper( str_replace( '-', '_', $h ) ); |
| 304 |
if ( ! isset( $_SERVER[ $key ] ) ) { |
| 305 |
// header missing -> fail |
| 306 |
return false; |
| 307 |
} |
| 308 |
$signedHeaders[ $h ] = trim( $_SERVER[ $key ] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Using for signature validation, not for rendering. |
| 309 |
} |
| 310 |
} |
| 311 |
|
| 312 |
// Build canonical request (exclude signature) |
| 313 |
$qsForSigning = $qs; |
| 314 |
unset( $qsForSigning['X-SE-Signature'] ); |
| 315 |
|
| 316 |
$canonicalRequest = $this->canonicalRequest( |
| 317 |
strtoupper( $method ), |
| 318 |
$this->canonicalUri( $parsed['path'] ?? '/' ), |
| 319 |
$this->canonicalQuery( $qsForSigning, true ), |
| 320 |
$this->canonicalHeaders( $signedHeaders ), |
| 321 |
implode( ';', array_keys( $signedHeaders ) ) |
| 322 |
); |
| 323 |
|
| 324 |
$scope = $this->credentialScope( $date ); |
| 325 |
$stringToSign = $this->stringToSign( gmdate( 'Ymd\THis\Z', $requestTime ), $scope, $canonicalRequest ); |
| 326 |
$signingKey = $this->deriveSigningKey( $date ); |
| 327 |
$expectedSig = hash_hmac( 'sha256', $stringToSign, $signingKey ); |
| 328 |
|
| 329 |
if ( ! hash_equals( $expectedSig, $qs['X-SE-Signature'] ) ) { |
| 330 |
return new WP_Error( 'invalid-sig', __( 'Signature verification failed.', 'storeengine' ) ); |
| 331 |
} |
| 332 |
|
| 333 |
return true; |
| 334 |
} |
| 335 |
|
| 336 |
// ===== Helpers ===== |
| 337 |
|
| 338 |
private function parseUrlStrict( string $url ): array { |
| 339 |
$p = wp_parse_url( $url ); |
| 340 |
if ( ! $p || empty( $p['scheme'] ) || empty( $p['host'] ) ) { |
| 341 |
throw new \InvalidArgumentException( 'URL must include scheme and host.' ); |
| 342 |
} |
| 343 |
if ( ! isset( $p['path'] ) ) { |
| 344 |
$p['path'] = '/'; |
| 345 |
} |
| 346 |
|
| 347 |
return $p; |
| 348 |
} |
| 349 |
|
| 350 |
private function parseQuery( string $query ): array { |
| 351 |
$out = []; |
| 352 |
if ( $query !== '' ) { |
| 353 |
foreach ( explode( '&', $query ) as $pair ) { |
| 354 |
if ( $pair === '' ) { |
| 355 |
continue; |
| 356 |
} |
| 357 |
|
| 358 |
[ |
| 359 |
$key, |
| 360 |
$value, |
| 361 |
] = array_pad( explode( '=', $pair, 2 ), 2, '' ); |
| 362 |
|
| 363 |
$out[ rawurldecode( $key ) ] = rawurldecode( $value ); |
| 364 |
} |
| 365 |
} |
| 366 |
|
| 367 |
return $out; |
| 368 |
} |
| 369 |
|
| 370 |
private function canonicalUri( string $path ): string { |
| 371 |
// Normalize each segment like AWS (double-encode reserved chars) |
| 372 |
$segments = explode( '/', $path ); |
| 373 |
$enc = array_map( fn( $s ) => implode( '%20', array_map( 'rawurlencode', explode( ' ', $s ) ) ), $segments ); |
| 374 |
|
| 375 |
return implode( '/', $enc ) ?: '/'; |
| 376 |
} |
| 377 |
|
| 378 |
private function canonicalQuery( array $params, bool $excludeSig ): string { |
| 379 |
if ( $excludeSig ) { |
| 380 |
unset( $params['X-SE-Signature'] ); |
| 381 |
} |
| 382 |
ksort( $params, SORT_STRING ); |
| 383 |
$pairs = []; |
| 384 |
foreach ( $params as $k => $v ) { |
| 385 |
$pairs[] = rawurlencode( (string) $k ) . '=' . rawurlencode( (string) $v ); |
| 386 |
} |
| 387 |
|
| 388 |
return implode( '&', $pairs ); |
| 389 |
} |
| 390 |
|
| 391 |
private function canonicalHeaders( array $headers ): string { |
| 392 |
ksort( $headers, SORT_STRING ); |
| 393 |
$lines = []; |
| 394 |
foreach ( $headers as $k => $v ) { |
| 395 |
$v = preg_replace( '/\s+/', ' ', trim( (string) $v ) ); |
| 396 |
$lines[] = strtolower( $k ) . ':' . $v; |
| 397 |
} |
| 398 |
|
| 399 |
return implode( "\n", $lines ) . "\n"; |
| 400 |
} |
| 401 |
|
| 402 |
private function canonicalRequest( string $method, string $uri, string $query, string $headers, string $signedHeaders ): string { |
| 403 |
return implode( "\n", [ |
| 404 |
$method, |
| 405 |
$uri, |
| 406 |
$query, |
| 407 |
$headers, |
| 408 |
$signedHeaders, |
| 409 |
hash( 'sha256', $this->payload_hash ), |
| 410 |
] ); |
| 411 |
} |
| 412 |
|
| 413 |
private function stringToSign( string $amzDatetime, string $scope, string $canonicalRequest ): string { |
| 414 |
return "SE-HMAC-SHA256\n" . |
| 415 |
$amzDatetime . "\n" . |
| 416 |
$scope . "\n" . |
| 417 |
hash( 'sha256', $canonicalRequest ); |
| 418 |
} |
| 419 |
|
| 420 |
private function credentialScope( string $date ): string { |
| 421 |
// <date>/<region>/<service>/SE-Secure-Request (AWS-like) |
| 422 |
return $date . '/' . $this->region . '/' . $this->service . '/SE-Secure-Request'; |
| 423 |
} |
| 424 |
|
| 425 |
private function deriveSigningKey( string $date ): string { |
| 426 |
// AWS-like key ladder: kDate = HMAC("STOREENGINE4".$secret, date) ... |
| 427 |
$kSecret = 'STOREENGINE4' . $this->secret; |
| 428 |
$kDate = hash_hmac( 'sha256', $date, $kSecret, true ); |
| 429 |
$kRegion = hash_hmac( 'sha256', $this->region, $kDate, true ); |
| 430 |
$kSvc = hash_hmac( 'sha256', $this->service, $kRegion, true ); |
| 431 |
|
| 432 |
return hash_hmac( 'sha256', 'SE-Secure-Request', $kSvc, true ); |
| 433 |
} |
| 434 |
|
| 435 |
private function parseAmzDatetime( string $s ): ?int { |
| 436 |
// Expect: YYYYMMDDTHHMMSSZ |
| 437 |
if ( ! preg_match( '/^\d{8}T\d{6}Z$/', $s ) ) { |
| 438 |
return null; |
| 439 |
} |
| 440 |
|
| 441 |
$dt = \DateTime::createFromFormat( 'Ymd\THis\Z', $s, new \DateTimeZone( 'UTC' ) ); |
| 442 |
|
| 443 |
return $dt ? $dt->getTimestamp() : null; |
| 444 |
} |
| 445 |
|
| 446 |
/** |
| 447 |
* Cloning is forbidden. |
| 448 |
*/ |
| 449 |
public function __clone() { |
| 450 |
_doing_it_wrong( __FUNCTION__, esc_html__( 'Cloning is forbidden.', 'storeengine' ), '0.0.4' ); |
| 451 |
} |
| 452 |
|
| 453 |
/** |
| 454 |
* Unserializing instances of this class is forbidden. |
| 455 |
*/ |
| 456 |
public function __wakeup() { |
| 457 |
_doing_it_wrong( __FUNCTION__, esc_html__( 'Unserializing instances of this class is forbidden.', 'storeengine' ), '0.0.4' ); |
| 458 |
} |
| 459 |
} |
| 460 |
|
| 461 |
// End of file url-presigner.php. |
| 462 |
|
