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<?php
declare(strict_types=1);
/**
* @copyright Copyright (C) 2020 Richard Steinmetz <richard@steinmetz.cloud>
*
* @author westberliner
* @author Richard Steinmetz <richard@steinmetz.cloud>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace OCA\Checksum\Controller;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http\JSONResponse;
use OCP\Files\Mount\IMountManager;
use OCP\IL10N;
use OCP\IRequest;
use OCP\IUserSession;
use OCP\L10N\IFactory;
class ChecksumController extends Controller {
/**
* @var IL10N
*/
private IL10N $language;
/**
* @var IMountManager
*/
private IMountManager $mountManager;
/**
* @var IUserSession
*/
private IUserSession $userSession;
/**
* ChecksumController constructor.
*
* @param string $appName
* @param IRequest $request
* @param IFactory $languageFactory
* @param IMountManager $mountManager
* @param IUserSession $userSession
*/
public function __construct(
string $appName,
IRequest $request,
IFactory $languageFactory,
IMountManager $mountManager,
IUserSession $userSession
) {
parent::__construct($appName, $request);
$this->language = $languageFactory->get('checksum');
$this->mountManager = $mountManager;
$this->userSession = $userSession;
}
/**
* Compute the hash of a file.
*
* @NoAdminRequired
* @param string $source file path relative to user home
* @param string $type hash algorithm
* @return JSONResponse
*/
public function check(string $source, string $type): JSONResponse {
if (!$this->checkAlgorithmType($type)) {
return new JSONResponse(
array(
'response' => 'error',
'msg' => $this->language->t(
'The algorithm type "%s" is not a valid or supported algorithm type.',
array($type)
)
)
);
}
$hash = $this->getHash($source, $type);
if ($hash) {
return new JSONResponse(
array(
'response' => 'success',
'msg' => $hash
)
);
} else {
return new JSONResponse(
array(
'response' => 'error',
'msg' => $this->language->t('File not found.')
)
);
}
}
private function getHash(string $source, string $type): ?string {
$user = $this->userSession->getUser();
if (!$user) {
return null;
}
$absPath = $user->getUID() . '/files/' . $source;
$mount = $this->mountManager->find($absPath);
if (!$mount) {
return null;
}
$internalPath = $mount->getInternalPath($absPath);
$file = $mount->getStorage()->fopen($internalPath, 'rb');
if (!$file) {
return null;
}
$hash = hash_init($type);
hash_update_stream($hash, $file);
fclose($file);
return hash_final($hash);
}
private function checkAlgorithmType(string $type): bool {
return in_array($type, $this->getAllowedAlgorithmTypes()) && in_array($type, hash_algos());
}
private function getAllowedAlgorithmTypes(): array {
return array(
'md5',
'sha1',
'sha256',
'sha384',
'sha512',
'crc32'
);
}
}
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