Current File : /home/graphicd/public_html/vebto/vendor/kreait/firebase-tokens/src/Firebase/Auth/Token/Verifier.php
<?php
declare(strict_types=1);
namespace Firebase\Auth\Token;
use DateInterval;
use DateTimeImmutable;
use DateTimeInterface;
use Firebase\Auth\Token\Domain\KeyStore;
use Firebase\Auth\Token\Exception\ExpiredToken;
use Firebase\Auth\Token\Exception\InvalidSignature;
use Firebase\Auth\Token\Exception\InvalidToken;
use Firebase\Auth\Token\Exception\IssuedInTheFuture;
use Firebase\Auth\Token\Exception\UnknownKey;
use Lcobucci\Clock\SystemClock;
use Lcobucci\JWT\Configuration;
use Lcobucci\JWT\Signer;
use Lcobucci\JWT\Signer\Key\InMemory;
use Lcobucci\JWT\Signer\Rsa\Sha256;
use Lcobucci\JWT\Token;
use Lcobucci\JWT\Validation\Constraint\IssuedBy;
use Lcobucci\JWT\Validation\Constraint\PermittedFor;
use Lcobucci\JWT\Validation\Constraint\SignedWith;
use Lcobucci\JWT\Validation\Constraint\ValidAt;
use Lcobucci\JWT\Validation\ConstraintViolation;
use OutOfBoundsException;
use Throwable;
final class Verifier implements Domain\Verifier
{
/** @var string */
private $projectId;
/** @var KeyStore */
private $keys;
/** @var Configuration */
private $config;
/**
* @see https://github.com/firebase/firebase-admin-dotnet/pull/29
*
* @var int
*/
private $leewayInSeconds = 300;
/**
* @deprecated 1.9.0
* @see \Kreait\Firebase\JWT\IdTokenVerifier
*/
public function __construct(string $projectId, KeyStore $keys = null, Signer $signer = null)
{
$this->projectId = $projectId;
$this->keys = $keys ?? new HttpKeyStore();
$this->config = Configuration::forSymmetricSigner($signer ?? new Sha256(), InMemory::plainText(''));
}
public function verifyIdToken($token): Token
{
if (!($token instanceof Token)) {
$token = $this->config->parser()->parse($token);
}
$key = $this->getKey($token);
$clock = SystemClock::fromSystemTimezone();
$leeway = new DateInterval('PT'.$this->leewayInSeconds.'S');
try {
$this->config->validator()->assert($token, ...[
new ValidAt($clock, $leeway),
new PermittedFor($this->projectId),
new IssuedBy(...["https://securetoken.google.com/{$this->projectId}"]),
new SignedWith($this->config->signer(), InMemory::plainText($key)),
]);
$this->assertUserAuthedAt($token, $clock->now()->add($leeway));
} catch (Throwable $e) {
$message = $e->getMessage();
if (\mb_stripos($message, 'signature mismatch') !== false) {
throw new InvalidSignature($token, $message);
}
if (\mb_stripos($message, 'expired') !== false) {
throw new ExpiredToken($token);
}
if (\mb_stripos($message, 'future') !== false) {
throw new IssuedInTheFuture($token);
}
throw new InvalidToken($token, $e->getMessage());
}
return $token;
}
private function getKey(Token $token): string
{
$keyId = $token->headers()->get('kid', '');
try {
return $this->keys->get($keyId);
} catch (OutOfBoundsException $e) {
throw new UnknownKey($token, $keyId);
}
}
private function assertUserAuthedAt(Token $token, DateTimeInterface $now)
{
if (!($token instanceof Token\Plain)) {
throw new ConstraintViolation('The token could not be decrypted');
}
/** @var int|DateTimeImmutable $authTime */
$authTime = $token->claims()->get('auth_time');
if (!$authTime) {
throw new ConstraintViolation('The token is missing the "auth_time" claim.');
}
if (\is_numeric($authTime)) {
$authTime = new DateTimeImmutable('@'.((int) $authTime));
}
if ($now < $authTime) {
throw new ConstraintViolation("The token's user must have authenticated in the past");
}
}
}
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