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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\Security\VerificationToken;
use OCP\AppFramework\Utility\ITimeFactory;
use OCP\BackgroundJob\IJobList;
use OCP\IConfig;
use OCP\IUser;
use OCP\Security\ICrypto;
use OCP\Security\ISecureRandom;
use OCP\Security\VerificationToken\InvalidTokenException;
use OCP\Security\VerificationToken\IVerificationToken;
use function json_encode;
class VerificationToken implements IVerificationToken {
protected const TOKEN_LIFETIME = 60 * 60 * 24 * 7;
public function __construct(
private IConfig $config,
private ICrypto $crypto,
private ITimeFactory $timeFactory,
private ISecureRandom $secureRandom,
private IJobList $jobList,
) {
}
/**
* @throws InvalidTokenException
*/
protected function throwInvalidTokenException(int $code): void {
throw new InvalidTokenException($code);
}
public function check(
string $token,
?IUser $user,
string $subject,
string $passwordPrefix = '',
bool $expiresWithLogin = false,
): void {
if ($user === null || !$user->isEnabled()) {
$this->throwInvalidTokenException(InvalidTokenException::USER_UNKNOWN);
}
$encryptedToken = $this->config->getUserValue($user->getUID(), 'core', $subject, null);
if ($encryptedToken === null) {
$this->throwInvalidTokenException(InvalidTokenException::TOKEN_NOT_FOUND);
}
try {
$decryptedToken = $this->crypto->decrypt($encryptedToken, $passwordPrefix . $this->config->getSystemValueString('secret'));
} catch (\Exception $e) {
// Retry with empty secret as a fallback for instances where the secret might not have been set by accident
try {
$decryptedToken = $this->crypto->decrypt($encryptedToken, $passwordPrefix);
} catch (\Exception $e2) {
$this->throwInvalidTokenException(InvalidTokenException::TOKEN_DECRYPTION_ERROR);
}
}
$splitToken = explode(':', $decryptedToken);
if (count($splitToken) !== 2) {
$this->throwInvalidTokenException(InvalidTokenException::TOKEN_INVALID_FORMAT);
}
if ($splitToken[0] < ($this->timeFactory->getTime() - self::TOKEN_LIFETIME)
|| ($expiresWithLogin && $user->getLastLogin() > $splitToken[0])) {
$this->throwInvalidTokenException(InvalidTokenException::TOKEN_EXPIRED);
}
if (!hash_equals($splitToken[1], $token)) {
$this->throwInvalidTokenException(InvalidTokenException::TOKEN_MISMATCH);
}
}
public function create(
IUser $user,
string $subject,
string $passwordPrefix = '',
): string {
$token = $this->secureRandom->generate(
21,
ISecureRandom::CHAR_DIGITS .
ISecureRandom::CHAR_LOWER .
ISecureRandom::CHAR_UPPER
);
$tokenValue = $this->timeFactory->getTime() . ':' . $token;
$encryptedValue = $this->crypto->encrypt($tokenValue, $passwordPrefix . $this->config->getSystemValueString('secret'));
$this->config->setUserValue($user->getUID(), 'core', $subject, $encryptedValue);
$jobArgs = json_encode([
'userId' => $user->getUID(),
'subject' => $subject,
'pp' => $passwordPrefix,
'notBefore' => $this->timeFactory->getTime() + self::TOKEN_LIFETIME * 2, // multiply to provide a grace period
]);
$this->jobList->add(CleanUpJob::class, $jobArgs);
return $token;
}
public function delete(string $token, IUser $user, string $subject): void {
$this->config->deleteUserValue($user->getUID(), 'core', $subject);
}
}
|
