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vendor/symfony/validator/Constraints/NotCompromisedPasswordValidator.php

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