Current File : //proc/thread-self/root/www/varak.net/nextcloud.varak.net/apps/twofactor_totp/lib/Service/Totp.php
<?php
declare(strict_types=1);
/**
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @copyright Copyright (c) 2016 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* Two-factor TOTP
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\TwoFactorTOTP\Service;
use Base32\Base32;
use EasyTOTP\Factory;
use EasyTOTP\TOTPValidResultInterface;
use OCA\TwoFactorTOTP\Db\TotpSecret;
use OCA\TwoFactorTOTP\Db\TotpSecretMapper;
use OCA\TwoFactorTOTP\Event\DisabledByAdmin;
use OCA\TwoFactorTOTP\Event\StateChanged;
use OCA\TwoFactorTOTP\Exception\NoTotpSecretFoundException;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\EventDispatcher\IEventDispatcher;
use OCP\IUser;
use OCP\Security\ICrypto;
use OCP\Security\ISecureRandom;
class Totp implements ITotp {
/** @var TotpSecretMapper */
private $secretMapper;
/** @var ICrypto */
private $crypto;
/** @var IEventDispatcher */
private $eventDispatcher;
/** @var ISecureRandom */
private $random;
public function __construct(TotpSecretMapper $secretMapper,
ICrypto $crypto,
IEventDispatcher $eventDispatcher,
ISecureRandom $random) {
$this->secretMapper = $secretMapper;
$this->crypto = $crypto;
$this->eventDispatcher = $eventDispatcher;
$this->random = $random;
}
public function hasSecret(IUser $user): bool {
try {
$secret = $this->secretMapper->getSecret($user);
return ITotp::STATE_ENABLED === (int)$secret->getState();
} catch (DoesNotExistException $ex) {
return false;
}
}
private function generateSecret(): string {
return $this->random->generate(32, ISecureRandom::CHAR_UPPER.'234567');
}
/**
* @param IUser $user
*/
public function createSecret(IUser $user): string {
try {
// Delete existing one
$oldSecret = $this->secretMapper->getSecret($user);
$this->secretMapper->delete($oldSecret);
} catch (DoesNotExistException $ex) {
// Ignore
}
// Create new one
$secret = $this->generateSecret();
$dbSecret = new TotpSecret();
$dbSecret->setUserId($user->getUID());
$dbSecret->setSecret($this->crypto->encrypt($secret));
$dbSecret->setState(ITotp::STATE_CREATED);
$this->secretMapper->insert($dbSecret);
return $secret;
}
public function enable(IUser $user, $key): bool {
if (!$this->validateSecret($user, $key)) {
return false;
}
$dbSecret = $this->secretMapper->getSecret($user);
$dbSecret->setState(ITotp::STATE_ENABLED);
$this->secretMapper->update($dbSecret);
$this->eventDispatcher->dispatch(StateChanged::class, new StateChanged($user, true));
return true;
}
public function deleteSecret(IUser $user, bool $byAdmin = false): void {
try {
// TODO: execute DELETE sql in mapper instead
$dbSecret = $this->secretMapper->getSecret($user);
$this->secretMapper->delete($dbSecret);
} catch (DoesNotExistException $ex) {
// Ignore
}
if ($byAdmin) {
$this->eventDispatcher->dispatch(DisabledByAdmin::class, new DisabledByAdmin($user));
} else {
$this->eventDispatcher->dispatch(StateChanged::class, new StateChanged($user, false));
}
}
public function validateSecret(IUser $user, string $key): bool {
try {
$dbSecret = $this->secretMapper->getSecret($user);
} catch (DoesNotExistException $ex) {
throw new NoTotpSecretFoundException();
}
$secret = $this->crypto->decrypt($dbSecret->getSecret());
$otp = Factory::getTOTP(Base32::decode($secret), 30, 6);
$counter = null;
$lastCounter = $dbSecret->getLastCounter();
if ($lastCounter !== -1) {
$counter = $lastCounter;
}
$result = $otp->verify($key, 3, $counter);
if ($result instanceof TOTPValidResultInterface) {
$dbSecret->setLastCounter($result->getCounter());
$this->secretMapper->update($dbSecret);
return true;
}
return false;
}
}
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