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<?php |
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declare(strict_types=1); |
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namespace Jasny\Auth\Session; |
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use Jasny\Auth\Session\Jwt\Cookie; |
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use Jasny\Auth\Session\Jwt\CookieInterface; |
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use Jasny\Immutable; |
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use Lcobucci\JWT\Parser; |
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use Lcobucci\JWT\Builder; |
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use Lcobucci\JWT\ValidationData; |
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/** |
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* Use JSON Web Token and JSON Web Signature (RFC 7519) to store auth session info. |
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* |
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* @see https://github.com/lcobucci/jwt |
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*/ |
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class Jwt implements SessionInterface |
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{ |
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use Immutable\With; |
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protected Builder $builder; |
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protected Parser $parser; |
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protected ValidationData $validation; |
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protected int $ttl = 24 * 3600; |
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protected CookieInterface $cookie; |
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/** |
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* JWT constructor. |
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*/ |
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public function __construct(Builder $builder, ValidationData $validation) |
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{ |
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$this->builder = $builder; |
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$this->validation = $validation; |
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$this->parser = new Parser(); |
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$this->cookie = new Cookie('jwt'); |
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} |
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/** |
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* Get a copy with a different TTL for expiry. |
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*/ |
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public function withTtl(int $seconds): self |
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{ |
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return $this->withProperty('ttl', $seconds); |
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} |
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/** |
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* Get a copy with custom cookie handler. |
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*/ |
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public function withCookie(CookieInterface $cookie): self |
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{ |
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return $this->withProperty('cookie', $cookie); |
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} |
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/** |
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* Get a copy with a custom JWT parser. |
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*/ |
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public function withParser(Parser $parser): self |
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{ |
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return $this->withProperty('parser', $parser); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getInfo(): array |
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{ |
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$jwt = $this->cookie->get(); |
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$token = $jwt !== null && $jwt !== '' |
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? $this->parser->parse($jwt) |
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: null; |
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if ($token === null || !$token->validate($this->validation)) { |
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return ['user' => null, 'context' => null, 'checksum' => null, 'timestamp' => null]; |
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} |
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return [ |
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'user' => $token->getClaim('user'), |
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'context' => $token->getClaim('context'), |
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'checksum' => $token->getClaim('checksum'), |
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'timestamp' => $token->hasHeader('iat') |
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? (new \DateTimeImmutable())->setTimestamp($token->getHeader('iat')) |
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: null, |
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]; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function persist($user, $context, ?string $checksum, ?\DateTimeInterface $timestamp): void |
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{ |
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$builder = clone $this->builder; |
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$time = isset($timestamp) ? $timestamp->getTimestamp() : time(); |
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$expire = $time + $this->ttl; |
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$token = $builder |
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->withClaim('user', $user) |
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->withClaim('context', $context) |
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->withClaim('checksum', $checksum) |
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->issuedAt($time, $timestamp !== null) |
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->expiresAt($expire) |
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->getToken(); |
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$this->cookie->set((string)$token, $expire); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function clear(): void |
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{ |
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$this->cookie->clear(); |
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} |
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} |
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