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<?php declare(strict_types=1); namespace Lcobucci\JWT\Validation\Constraint; use DateInterval; use DateTimeInterface; use Lcobucci\JWT\Token; use Lcobucci\JWT\UnencryptedToken; use Lcobucci\JWT\Validation\ConstraintViolation; use Lcobucci\JWT\Validation\ValidAt as ValidAtInterface; use Psr\Clock\ClockInterface as Clock; final class StrictValidAt implements ValidAtInterface { private readonly DateInterval $leeway; public function __construct(private readonly Clock $clock, ?DateInterval $leeway = null) { $this->leeway = $this->guardLeeway($leeway); } private function guardLeeway(?DateInterval $leeway): DateInterval { if ($leeway === null) { return new DateInterval('PT0S'); } if ($leeway->invert === 1) { throw LeewayCannotBeNegative::create(); } return $leeway; } public function assert(Token $token): void { if (! $token instanceof UnencryptedToken) { throw ConstraintViolation::error('You should pass a plain token', $this); } $now = $this->clock->now(); $this->assertIssueTime($token, $now->add($this->leeway)); $this->assertMinimumTime($token, $now->add($this->leeway)); $this->assertExpiration($token, $now->sub($this->leeway)); } /** @throws ConstraintViolation */ private function assertExpiration(UnencryptedToken $token, DateTimeInterface $now): void { if (! $token->claims()->has(Token\RegisteredClaims::EXPIRATION_TIME)) { throw ConstraintViolation::error('"Expiration Time" claim missing', $this); } if ($token->isExpired($now)) { throw ConstraintViolation::error('The token is expired', $this); } } /** @throws ConstraintViolation */ private function assertMinimumTime(UnencryptedToken $token, DateTimeInterface $now): void { if (! $token->claims()->has(Token\RegisteredClaims::NOT_BEFORE)) { throw ConstraintViolation::error('"Not Before" claim missing', $this); } if (! $token->isMinimumTimeBefore($now)) { throw ConstraintViolation::error('The token cannot be used yet', $this); } } /** @throws ConstraintViolation */ private function assertIssueTime(UnencryptedToken $token, DateTimeInterface $now): void { if (! $token->claims()->has(Token\RegisteredClaims::ISSUED_AT)) { throw ConstraintViolation::error('"Issued At" claim missing', $this); } if (! $token->hasBeenIssuedBefore($now)) { throw ConstraintViolation::error('The token was issued in the future', $this); } } }
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