<?php
declare(strict_types=1);
namespace ParagonIE\Paserk\Operations;
use ParagonIE\Paserk\PaserkException;
use ParagonIE\Paserk\Util;
use ParagonIE\Paseto\Keys\{
AsymmetricSecretKey,
SymmetricKey
};
use ParagonIE\Paseto\ProtocolInterface;
use TypeError;
/**
* Class Wrap
* @package ParagonIE\Paserk\Operations
*/
class Wrap
{
/** @var WrapInterface $wrapper */
protected WrapInterface $wrapper;
/**
* Wrap constructor.
* @param WrapInterface $wrapper
*/
public function __construct(WrapInterface $wrapper)
{
$this->wrapper = $wrapper;
}
/**
* @return ProtocolInterface
*/
public function getProtocol(): ProtocolInterface
{
return $this->wrapper->getProtocol();
}
/**
* @param SymmetricKey $key
* @return string
* @throws PaserkException
*/
public function localWrap(SymmetricKey $key): string
{
$version = Util::getPaserkHeader($key->getProtocol());
$header = $version . '.local-wrap.' . $this->wrapper::customId() . '.';
$wrapped = $this->wrapper->wrapKey($header, $key);
return $header . $wrapped;
}
/**
* @param string $key
* @return SymmetricKey
*/
public function localUnwrap(string $key): SymmetricKey
{
$unwrapped = $this->wrapper->unwrapKey($key);
if (!($unwrapped instanceof SymmetricKey)) {
throw new TypeError('Invalid type returned from unwrapKey()');
}
return $unwrapped;
}
/**
* @param AsymmetricSecretKey $key
* @return string
* @throws PaserkException
*/
public function secretWrap(AsymmetricSecretKey $key): string
{
$version = Util::getPaserkHeader($key->getProtocol());
$header = $version . '.secret-wrap.' . $this->wrapper::customId() . '.';
$wrapped = $this->wrapper->wrapKey($header, $key);
return $header . $wrapped;
}
/**
* @param string $key
* @return AsymmetricSecretKey
*/
public function secretUnwrap(string $key): AsymmetricSecretKey
{
$unwrapped = $this->wrapper->unwrapKey($key);
if (!($unwrapped instanceof AsymmetricSecretKey)) {
throw new TypeError('Invalid type returned from unwrapKey()');
}
return $unwrapped;
}
}
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