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- <?php
- declare(strict_types=1);
- /**
- * @copyright Copyright (c) 2016 Lukas Reschke <lukas@statuscode.ch>
- *
- * @author Bjoern Schiessle <bjoern@schiessle.org>
- * @author Joas Schilling <coding@schilljs.com>
- * @author Lukas Reschke <lukas@statuscode.ch>
- *
- * @license GNU AGPL version 3 or any later version
- *
- * 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 <http://www.gnu.org/licenses/>.
- *
- */
- namespace OC\Security\IdentityProof;
- use OC\Files\AppData\Factory;
- use OCP\Files\IAppData;
- use OCP\IConfig;
- use OCP\IUser;
- use OCP\Security\ICrypto;
- class Manager {
- /** @var IAppData */
- private $appData;
- /** @var ICrypto */
- private $crypto;
- /** @var IConfig */
- private $config;
- /**
- * @param Factory $appDataFactory
- * @param ICrypto $crypto
- * @param IConfig $config
- */
- public function __construct(Factory $appDataFactory,
- ICrypto $crypto,
- IConfig $config
- ) {
- $this->appData = $appDataFactory->get('identityproof');
- $this->crypto = $crypto;
- $this->config = $config;
- }
- /**
- * Calls the openssl functions to generate a public and private key.
- * In a separate function for unit testing purposes.
- *
- * @return array [$publicKey, $privateKey]
- */
- protected function generateKeyPair(): array {
- $config = [
- 'digest_alg' => 'sha512',
- 'private_key_bits' => 2048,
- ];
- // Generate new key
- $res = openssl_pkey_new($config);
- openssl_pkey_export($res, $privateKey);
- // Extract the public key from $res to $pubKey
- $publicKey = openssl_pkey_get_details($res);
- $publicKey = $publicKey['key'];
- return [$publicKey, $privateKey];
- }
- /**
- * Generate a key for a given ID
- * Note: If a key already exists it will be overwritten
- *
- * @param string $id key id
- * @return Key
- */
- protected function generateKey(string $id): Key {
- list($publicKey, $privateKey) = $this->generateKeyPair();
- // Write the private and public key to the disk
- try {
- $this->appData->newFolder($id);
- } catch (\Exception $e) {}
- $folder = $this->appData->getFolder($id);
- $folder->newFile('private')
- ->putContent($this->crypto->encrypt($privateKey));
- $folder->newFile('public')
- ->putContent($publicKey);
- return new Key($publicKey, $privateKey);
- }
- /**
- * Get key for a specific id
- *
- * @param string $id
- * @return Key
- */
- protected function retrieveKey(string $id): Key {
- try {
- $folder = $this->appData->getFolder($id);
- $privateKey = $this->crypto->decrypt(
- $folder->getFile('private')->getContent()
- );
- $publicKey = $folder->getFile('public')->getContent();
- return new Key($publicKey, $privateKey);
- } catch (\Exception $e) {
- return $this->generateKey($id);
- }
- }
- /**
- * Get public and private key for $user
- *
- * @param IUser $user
- * @return Key
- */
- public function getKey(IUser $user): Key {
- $uid = $user->getUID();
- return $this->retrieveKey('user-' . $uid);
- }
- /**
- * Get instance wide public and private key
- *
- * @return Key
- * @throws \RuntimeException
- */
- public function getSystemKey(): Key {
- $instanceId = $this->config->getSystemValue('instanceid', null);
- if ($instanceId === null) {
- throw new \RuntimeException('no instance id!');
- }
- return $this->retrieveKey('system-' . $instanceId);
- }
- }
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