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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2020 Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @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 OCA\User_SAML;
use OCA\User_SAML\Exceptions\NoUserFoundException;
use OCP\IUser;
use OCP\IUserManager;
class UserResolver {
/** @var IUserManager */
private $userManager;
public function __construct(IUserManager $userManager) {
$this->userManager = $userManager;
}
/**
* @throws NoUserFoundException
*/
public function findExistingUserId(string $rawUidCandidate, bool $force = false): string {
if($force) {
$this->ensureUser($rawUidCandidate);
}
if($this->userManager->userExists($rawUidCandidate)) {
return $rawUidCandidate;
}
try {
$sanitized = $this->sanitizeUserIdCandidate($rawUidCandidate);
} catch(\InvalidArgumentException $e) {
$sanitized = '';
}
if($this->userManager->userExists($sanitized)) {
return $sanitized;
}
throw new NoUserFoundException('User' . $rawUidCandidate . ' not valid or not found');
}
/**
* @throws NoUserFoundException
*/
public function findExistingUser(string $rawUidCandidate): IUser {
$uid = $this->findExistingUserId($rawUidCandidate);
$user = $this->userManager->get($uid);
if($user === null) {
throw new NoUserFoundException('User' . $rawUidCandidate . ' not valid or not found');
}
return $user;
}
public function userExists(string $uid, bool $force = false): bool {
try {
$this->findExistingUserId($uid, $force);
return true;
} catch(NoUserFoundException $e) {
return false;
}
}
protected function ensureUser($search) {
$this->userManager->search($search);
}
/**
* @throws \InvalidArgumentException
*/
protected function sanitizeUserIdCandidate(string $rawUidCandidate): string {
//FIXME: adjusted copy of LDAP's Access::sanitizeUsername(), should go to API
$sanitized = trim($rawUidCandidate);
// Transliteration to ASCII
$transliterated = @iconv('UTF-8', 'ASCII//TRANSLIT', $sanitized);
if($transliterated !== false) {
// depending on system config iconv can work or not
$sanitized = $transliterated;
}
// Replacements
$sanitized = str_replace(' ', '_', $sanitized);
// Every remaining disallowed characters will be removed
$sanitized = preg_replace('/[^a-zA-Z0-9_.@-]/u', '', $sanitized);
if($sanitized === '') {
throw new \InvalidArgumentException('provided name template for username does not contain any allowed characters');
}
return $sanitized;
}
}