106 lines
3.4 KiB
PHP
106 lines
3.4 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Constraints;
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use Symfony\Component\HttpClient\HttpClient;
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use Symfony\Component\Validator\Constraint;
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use Symfony\Component\Validator\ConstraintValidator;
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use Symfony\Component\Validator\Exception\UnexpectedTypeException;
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use Symfony\Component\Validator\Exception\UnexpectedValueException;
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use Symfony\Contracts\HttpClient\Exception\ExceptionInterface;
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use Symfony\Contracts\HttpClient\HttpClientInterface;
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/**
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* Checks if a password has been leaked in a data breach using haveibeenpwned.com's API.
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* Use a k-anonymity model to protect the password being searched for.
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*
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* @see https://haveibeenpwned.com/API/v2#SearchingPwnedPasswordsByRange
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*
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* @author Kévin Dunglas <dunglas@gmail.com>
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*/
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class NotCompromisedPasswordValidator extends ConstraintValidator
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{
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private const DEFAULT_API_ENDPOINT = 'https://api.pwnedpasswords.com/range/%s';
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private $httpClient;
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private $charset;
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private $enabled;
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private $endpoint;
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public function __construct(HttpClientInterface $httpClient = null, string $charset = 'UTF-8', bool $enabled = true, string $endpoint = null)
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{
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if (null === $httpClient && !class_exists(HttpClient::class)) {
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throw new \LogicException(sprintf('The "%s" class requires the "HttpClient" component. Try running "composer require symfony/http-client".', self::class));
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}
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$this->httpClient = $httpClient ?? HttpClient::create();
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$this->charset = $charset;
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$this->enabled = $enabled;
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$this->endpoint = $endpoint ?? self::DEFAULT_API_ENDPOINT;
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}
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/**
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* {@inheritdoc}
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*
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* @throws ExceptionInterface
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*/
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public function validate($value, Constraint $constraint)
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{
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if (!$constraint instanceof NotCompromisedPassword) {
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throw new UnexpectedTypeException($constraint, NotCompromisedPassword::class);
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}
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if (!$this->enabled) {
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return;
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}
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if (null !== $value && !is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
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throw new UnexpectedValueException($value, 'string');
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}
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$value = (string) $value;
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if ('' === $value) {
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return;
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}
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if ('UTF-8' !== $this->charset) {
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$value = mb_convert_encoding($value, 'UTF-8', $this->charset);
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}
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$hash = strtoupper(sha1($value));
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$hashPrefix = substr($hash, 0, 5);
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$url = sprintf($this->endpoint, $hashPrefix);
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try {
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$result = $this->httpClient->request('GET', $url)->getContent();
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} catch (ExceptionInterface $e) {
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if ($constraint->skipOnError) {
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return;
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}
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throw $e;
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}
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foreach (explode("\r\n", $result) as $line) {
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[$hashSuffix, $count] = explode(':', $line);
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if ($hashPrefix.$hashSuffix === $hash && $constraint->threshold <= (int) $count) {
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$this->context->buildViolation($constraint->message)
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->setCode(NotCompromisedPassword::COMPROMISED_PASSWORD_ERROR)
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->addViolation();
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return;
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}
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}
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}
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}
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