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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Copyright (c) 2016 Lukas Reschke <[email protected]> |
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* |
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* @author Bjoern Schiessle <[email protected]> |
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* @author Joas Schilling <[email protected]> |
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* @author Lukas Reschke <[email protected]> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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namespace OC\Security\IdentityProof; |
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use OC\Files\AppData\Factory; |
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use OCP\Files\IAppData; |
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use OCP\IConfig; |
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use OCP\ILogger; |
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use OCP\IUser; |
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use OCP\Security\ICrypto; |
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class Manager { |
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/** @var IAppData */ |
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private $appData; |
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/** @var ICrypto */ |
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private $crypto; |
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/** @var IConfig */ |
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private $config; |
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/** @var ILogger */ |
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private $logger; |
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public function __construct(Factory $appDataFactory, |
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ICrypto $crypto, |
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IConfig $config, |
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ILogger $logger |
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) { |
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$this->appData = $appDataFactory->get('identityproof'); |
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$this->crypto = $crypto; |
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$this->config = $config; |
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$this->logger = $logger; |
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} |
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/** |
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* Calls the openssl functions to generate a public and private key. |
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* In a separate function for unit testing purposes. |
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* |
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* @return array [$publicKey, $privateKey] |
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* @throws \RuntimeException |
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*/ |
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protected function generateKeyPair(): array { |
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$config = [ |
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'digest_alg' => 'sha512', |
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'private_key_bits' => 2048, |
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]; |
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// Generate new key |
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$res = openssl_pkey_new($config); |
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if ($res === false) { |
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$this->logOpensslError(); |
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throw new \RuntimeException('OpenSSL reported a problem'); |
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} |
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if (openssl_pkey_export($res, $privateKey, null, $config) === false) { |
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$this->logOpensslError(); |
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throw new \RuntimeException('OpenSSL reported a problem'); |
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} |
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// Extract the public key from $res to $pubKey |
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$publicKey = openssl_pkey_get_details($res); |
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$publicKey = $publicKey['key']; |
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return [$publicKey, $privateKey]; |
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} |
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/** |
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* Generate a key for a given ID |
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* Note: If a key already exists it will be overwritten |
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* |
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* @param string $id key id |
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* @return Key |
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* @throws \RuntimeException |
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*/ |
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protected function generateKey(string $id): Key { |
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list($publicKey, $privateKey) = $this->generateKeyPair(); |
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// Write the private and public key to the disk |
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try { |
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$this->appData->newFolder($id); |
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} catch (\Exception $e) {} |
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$folder = $this->appData->getFolder($id); |
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$folder->newFile('private') |
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->putContent($this->crypto->encrypt($privateKey)); |
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$folder->newFile('public') |
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->putContent($publicKey); |
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return new Key($publicKey, $privateKey); |
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} |
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/** |
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* Get key for a specific id |
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* |
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* @param string $id |
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* @return Key |
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* @throws \RuntimeException |
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*/ |
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protected function retrieveKey(string $id): Key { |
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try { |
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$folder = $this->appData->getFolder($id); |
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$privateKey = $this->crypto->decrypt( |
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$folder->getFile('private')->getContent() |
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); |
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$publicKey = $folder->getFile('public')->getContent(); |
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return new Key($publicKey, $privateKey); |
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} catch (\Exception $e) { |
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return $this->generateKey($id); |
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} |
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} |
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/** |
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* Get public and private key for $user |
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* |
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* @param IUser $user |
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* @return Key |
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* @throws \RuntimeException |
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*/ |
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public function getKey(IUser $user): Key { |
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$uid = $user->getUID(); |
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return $this->retrieveKey('user-' . $uid); |
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} |
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/** |
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* Get instance wide public and private key |
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* |
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* @return Key |
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* @throws \RuntimeException |
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*/ |
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public function getSystemKey(): Key { |
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$instanceId = $this->config->getSystemValue('instanceid', null); |
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if ($instanceId === null) { |
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throw new \RuntimeException('no instance id!'); |
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} |
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return $this->retrieveKey('system-' . $instanceId); |
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} |
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private function logOpensslError(): void { |
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$errors = []; |
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while ($error = openssl_error_string()) { |
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$errors[] = $error; |
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} |
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$this->logger->critical('Something is wrong with your openssl setup: ' . implode(', ', $errors)); |
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} |
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} |
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nextcloud /
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