/** * Change a user's encryption passphrase * @param array $params keys: uid, password */ public static function setPassphrase($params) { if (\OCP\App::isEnabled('files_encryption') === false) { return true; } // Only attempt to change passphrase if server-side encryption // is in use (client-side encryption does not have access to // the necessary keys) if (Crypt::mode() === 'server') { $view = new \OC\Files\View('/'); $session = new Session($view); // Get existing decrypted private key $privateKey = $session->getPrivateKey(); if ($params['uid'] === \OCP\User::getUser() && $privateKey) { // Encrypt private key with new user pwd as passphrase $encryptedPrivateKey = Crypt::symmetricEncryptFileContent($privateKey, $params['password'], Helper::getCipher()); // Save private key if ($encryptedPrivateKey) { Keymanager::setPrivateKey($encryptedPrivateKey, \OCP\User::getUser()); } else { \OCP\Util::writeLog('files_encryption', 'Could not update users encryption password', \OCP\Util::ERROR); } // NOTE: Session does not need to be updated as the // private key has not changed, only the passphrase // used to decrypt it has changed } else { // admin changed the password for a different user, create new keys and reencrypt file keys $user = $params['uid']; $util = new Util($view, $user); $recoveryPassword = isset($params['recoveryPassword']) ? $params['recoveryPassword'] : null; // we generate new keys if... // ...we have a recovery password and the user enabled the recovery key // ...encryption was activated for the first time (no keys exists) // ...the user doesn't have any files if ($util->recoveryEnabledForUser() && $recoveryPassword || !$util->userKeysExists() || !$view->file_exists($user . '/files')) { // backup old keys $util->backupAllKeys('recovery'); $newUserPassword = $params['password']; // make sure that the users home is mounted \OC\Files\Filesystem::initMountPoints($user); $keypair = Crypt::createKeypair(); // Disable encryption proxy to prevent recursive calls $proxyStatus = \OC_FileProxy::$enabled; \OC_FileProxy::$enabled = false; // Save public key Keymanager::setPublicKey($keypair['publicKey'], $user); // Encrypt private key with new password $encryptedKey = Crypt::symmetricEncryptFileContent($keypair['privateKey'], $newUserPassword, Helper::getCipher()); if ($encryptedKey) { Keymanager::setPrivateKey($encryptedKey, $user); if ($recoveryPassword) { // if recovery key is set we can re-encrypt the key files $util = new Util($view, $user); $util->recoverUsersFiles($recoveryPassword); } } else { \OCP\Util::writeLog('files_encryption', 'Could not update users encryption password', \OCP\Util::ERROR); } \OC_FileProxy::$enabled = $proxyStatus; } } } }