<?php
namespace ParagonIE\CipherSweet\KeyProvider;
use ParagonIE\CipherSweet\Backend\Key\SymmetricKey;
use ParagonIE\CipherSweet\Contract\BackendInterface;
use ParagonIE\CipherSweet\Contract\KeyProviderInterface;
use ParagonIE\CipherSweet\Exception\KeyProviderException;
/**
* Class FileProvider
* @package ParagonIE\CipherSweet\KeyProvider
*/
class FileProvider implements KeyProviderInterface
{
/**
* @var BackendInterface $backend
*/
protected $backend;
/**
* @var string|null $symmetricKeyPath
*/
protected $symmetricKeyPath = null;
/**
* FileProvider constructor.
*
* @param BackendInterface $backend
* @param string|null $symmetricKeyPath
*/
public function __construct(
BackendInterface $backend,
$symmetricKeyPath = null
) {
$this->backend = $backend;
$this->symmetricKeyPath = $symmetricKeyPath;
}
/**
* @return BackendInterface
*/
public function getBackend()
{
return $this->backend;
}
/**
* @return SymmetricKey
* @throws KeyProviderException
*/
public function getSymmetricKey()
{
if (\is_null($this->symmetricKeyPath)) {
throw new KeyProviderException('Symmetric key path was not provided');
}
$contents = \file_get_contents($this->symmetricKeyPath);
if (!\is_string($contents)) {
throw new KeyProviderException('Could not read symmetric key from file.');
}
return new SymmetricKey($this->backend, $contents);
}
}
|
Download
