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<?php |
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declare(strict_types=1); |
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namespace Porthou\Password\Validators; |
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use Generator; |
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use Http\Client\HttpClient; |
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use Http\Discovery\HttpClientDiscovery; |
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use Http\Discovery\MessageFactoryDiscovery; |
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use Http\Message\MessageFactory; |
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use Porthou\Password\PasswordException; |
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use Porthou\Password\Validator; |
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class PasswordPwnedApiValidator implements Validator |
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{ |
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/** @var int $minimumThreshold */ |
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private $minimumThreshold; |
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/** @var HttpClient */ |
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private $httpClient; |
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/** @var MessageFactory */ |
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private $messageFactory; |
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/** |
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* PasswordPwnedApiValidator constructor. |
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* |
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* @param int $minimumThreshold How many times a password must appear before we consider it invalid |
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* |
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* @param HttpClient|null $httpClient The HTTP Client to use, or null for automatic discovery |
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* @param MessageFactory|null $messageFactory The Message Factory to use or null for automatic discovery |
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* |
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* @see https://haveibeenpwned.com/API/v2 for information on the API. |
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*/ |
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public function __construct(int $minimumThreshold = 50, HttpClient $httpClient = null, MessageFactory $messageFactory = null) |
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{ |
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$this->minimumThreshold = $minimumThreshold; |
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if ($httpClient === null) { |
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$this->httpClient = HttpClientDiscovery::find(); |
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} else { |
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$this->httpClient = $httpClient; |
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} |
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if ($messageFactory === null) { |
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$this->messageFactory = MessageFactoryDiscovery::find(); |
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} else { |
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$this->messageFactory = $messageFactory; |
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} |
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} |
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/** {@inheritdoc} */ |
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public function validate(string $password): bool |
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{ |
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$passwordHash = sha1($password); |
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$prefix = substr($passwordHash, 0, 5); |
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foreach ($this->getBlacklistPasswords($prefix) as $badPassword) { |
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[$badHash, $count] = $badPassword; |
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if ( |
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$passwordHash === $prefix . $badHash |
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&& $count >= $this->minimumThreshold |
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) { |
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throw new PasswordException('Password has been pwned.'); |
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} |
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} |
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return true; |
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} |
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/** |
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* Iterates over and yields each blacklisted password |
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* |
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* @param string $partHash The first 5 characters of the sha1'd password |
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* @return Generator |
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*/ |
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private function getBlacklistPasswords(string $partHash): Generator |
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{ |
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try { |
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$response = $this->httpClient->sendRequest( |
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$this->messageFactory->createRequest( |
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'GET', |
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'https://api.pwnedpasswords.com/range/' . $partHash |
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) |
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); |
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} catch (\Http\Client\Exception $e) { |
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return; |
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} |
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$bodyStream = $response->getBody()->detach(); |
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if ($bodyStream === null) { |
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return; |
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} |
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while (($password = fgets($bodyStream)) !== false) { |
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yield explode(':', trim((string)$password)); |
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} |
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fclose($bodyStream); |
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} |
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} |
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AnthonyPorthouse /
password
