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<?php
/**
* JSON Web Key (RFC7517) Handler
*
* PHP version 5
*
* @author Jim Wigginton <terrafrost@php.net>
* @copyright 2015 Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
*/
namespace phpseclib3\Crypt\Common\Formats\Keys;
use phpseclib3\Common\Functions\Strings;
/**
* JSON Web Key Formatted Key Handler
*
* @author Jim Wigginton <terrafrost@php.net>
*/
abstract class JWK
{
/**
* Break a public or private key down into its constituent components
*
* @param string $key
* @param string $password
* @return array
*/
public static function load($key, $password = '')
{
if (!Strings::is_stringable($key)) {
throw new \UnexpectedValueException('Key should be a string - not a ' . gettype($key));
}
$key = preg_replace('#\s#', '', $key); // remove whitespace
if (PHP_VERSION_ID >= 73000) {
$key = json_decode($key, null, 512, JSON_THROW_ON_ERROR);
} else {
$key = json_decode($key);
if (!$key) {
throw new \RuntimeException('Unable to decode JSON');
}
}
if (isset($key->kty)) {
return $key;
}
if (count($key->keys) != 1) {
throw new \RuntimeException('Although the JWK key format supports multiple keys phpseclib does not');
}
return $key->keys[0];
}
/**
* Wrap a key appropriately
*
* @return string
*/
protected static function wrapKey(array $key, array $options)
{
return json_encode(['keys' => [$key + $options]]);
}
}