How to decrypt hash security in phalcon - phalcon

Question

Save crypt hash security:
$usuario = new User();
$usuario->password = $this->security->hash($this->request->getPost("pass"));
if (!$usuario->save()) {
foreach ($usuario->getMessages() as $message) {
$this->flash->error($message);
}
$this->dispatcher->forward([
'controller' => "usuario",
'action' => 'new'
]);
return;
}
now, How to decrypt hash security to send my form:
$usuario = User::findFirstByid($iduser);
$this->tag->setDefault("pass", $this->encryption->decrypt($usuario->password));
I having this: Notice: Access to undefined property encryption in ...

Answer 1

As #Juri said Hashes are only one way. You can however use encryptBase64() which is two way and you can decode it back. Do not use it for passwords, use it for some data you need to pass to someone and read it back, like api token etc..
Here is how to set it up:
$di->setShared('crypt', function () use ($config) {
$crypt = new \Phalcon\Crypt();
$crypt->setKey('i$4^&/:%2#k50ROQ<#{(e=*!<7u|rI~0');
return $crypt;
});
Helper functions I created, but you can use it directly:
...
...
private static $cryptKey = 'i$4^&/:%2#k50ROQ<#{(e=*!<7u|rI~0';
/**
* Generate url safe encoded string
*
* #param string $string string to be encoded
* #return encoded string
*/
public static function encodeString($string)
{
$crypt = new \Phalcon\Crypt();
return $crypt->encryptBase64($string, self::$cryptKey, true);
}
/**
* Decode string generated with Common::encodeString()
*
* #param string $string Encoded string
* #return decoded string
*/
public static function decodeString($string)
{
$crypt = new \Phalcon\Crypt();
return $crypt->decryptBase64($string, self::$cryptKey, true);
}