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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\Password_Policy\Compliance;
use OC\HintException;
use OCA\Password_Policy\PasswordPolicyConfig;
use OCP\IConfig;
use OCP\IL10N;
use OCP\ILogger;
use OCP\IUser;
use OCP\IUserSession;
use OCP\PreConditionNotMetException;
use OCP\Security\IHasher;
class HistoryCompliance implements IAuditor, IUpdatable {
/** @var string */
protected $uid;
/** @var PasswordPolicyConfig */
private $policyConfig;
/** @var IConfig */
private $config;
/** @var IUserSession */
private $session;
/** @var IHasher */
private $hasher;
/** @var IL10N */
private $l;
/** @var ILogger */
private $logger;
public function __construct(
PasswordPolicyConfig $policyConfig,
IConfig $config,
IUserSession $session,
IHasher $hasher,
IL10N $l,
ILogger $logger
) {
$this->policyConfig = $policyConfig;
$this->config = $config;
$this->session = $session;
$this->hasher = $hasher;
$this->l = $l;
$this->logger = $logger;
}
/**
* @throws HintException
*/
public function audit(IUser $user, string $password): void {
if ($this->policyConfig->getHistorySize() === 0) {
return;
}
$history = $this->getHistory($user);
foreach ($history as $hash) {
if ($this->hasher->verify($password, $hash)) {
$message = 'Password must not have been used recently before.';
$message_t = $this->l->t(
'Password must not have been used recently before.'
);
throw new HintException($message, $message_t);
}
}
}
/**
* @throws PreConditionNotMetException
*/
public function update(IUser $user, string $password): void {
$historySize = $this->policyConfig->getHistorySize();
if ($historySize === 0) {
$this->config->deleteUserValue($user->getUID(), 'password_policy', 'passwordHistory');
return;
}
$history = $this->getHistory($user);
array_unshift($history, $this->hasher->hash($password));
$history = \array_slice($history, 0, $historySize);
$this->config->setUserValue(
$user->getUID(),
'password_policy',
'passwordHistory',
\json_encode($history)
);
}
protected function getHistory(IUser $user): array {
$history = $this->config->getUserValue(
$user->getUID(),
'password_policy',
'passwordHistory',
'[]'
);
$history = \json_decode($history, true);
if (!is_array($history)) {
$this->logger->warning(
'Received password history of {uid} had the unexpected value of {history}, resetting.',
['app' => 'password_policy', 'uid' => $user->getUID(), 'history' => $history]
);
$history = [];
}
$history = \array_slice($history, 0, $this->policyConfig->getHistorySize());
return $history;
}
}
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