Bind temporary and the permanent authorization key

[2012mjm]

I have read here https://core.telegram.org/api/pfs and here https://core.telegram.org/method/auth.bindTempAuthKey for bind temporary and the permanent authorization key
I with respect to understanding the AuthKeyHandler class code wrote the following code

class AuthKeyHandler extends AckHandler
{
    ... 
    ... 
    ... 
    public function bind_temp_auth_key()
    {
        $nonce      = \phpseclib\Crypt\Random::string(16);
        $expires_at = time() + $this->settings['authorization']['auth_key']['expires_in'];

        $data = $this->tl->serialize_obj('bind_auth_key_inner',
            [
                'nonce'             => $nonce,
                'temp_auth_key_id'  => $this->settings['authorization']['temp_auth_key']['id'],
                'perm_auth_key_id'  => $this->settings['authorization']['auth_key']['id'],
                'temp_session_id'   => $this->settings['authorization']['session_id'],
                'expires_at'        => $expires_at,
            ]
        );

        $sha_digest         = sha1($data, true);
        $random_bytes       = \phpseclib\Crypt\Random::string(255 - strlen($data) - strlen($sha_digest));
        $to_encrypt         = $sha_digest.$data.$random_bytes;
        $encrypted_message  = $this->key->encrypt($to_encrypt);

        $result = $this->method_call('auth.bindTempAuthKey',
            [
                'perm_auth_key_id'  => $this->settings['authorization']['auth_key']['id'],
                'nonce'             => $nonce,
                'expires_at'        => $expires_at,
                'encrypted_message' => $encrypted_message,
            ]
        );

        var_dump($result);
    }
}

but the following error

Fatal error: Uncaught exception 'danog\MadelineProto\TL\Exception' with message 'serialize_param: given value isn't numeric'

because $nonce int128 type, but i want long type here

[danog]

This isn't working because you're not passing a long to the nonce parameter, but a random string.
To turn it into a long you need to unpack it using the <q parameter of PHPStruct (see how I did it in the above functions).

[2012mjm]

Do you mean this following code

$nonce = \phpseclib\Crypt\Random::string(16);
$nonceToLong = $this->struct->unpack('<q', $nonce);
echo $nonceToLong;

Fatal error: Uncaught exception 'danog\PHP\StructException' with message 'Length of given data (16) is different from length calculated using format string (8).

[danog]

@2012mjm You need to generate a random string of 8 bytes to convert it to a long

[danog]

$nonceToLong = $this->struct->unpack('<q',  \phpseclib\Crypt\Random::string(8)); // Do not declare variables that are only going to be used once
echo $nonceToLong;

[2012mjm]

this is ok

[danog]

I made it work. Yay!