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<?php declare(strict_types=1); namespace SpomkyLabs\Pki\X509\Certificate; use DateTimeImmutable; use SpomkyLabs\Pki\ASN1\Element; use SpomkyLabs\Pki\ASN1\Type\Primitive\GeneralizedTime; use SpomkyLabs\Pki\ASN1\Type\Primitive\UTCTime; use SpomkyLabs\Pki\ASN1\Type\TimeType; use SpomkyLabs\Pki\X509\Feature\DateTimeHelper; use UnexpectedValueException; /** * Implements *Time* ASN.1 type. * * @see https://tools.ietf.org/html/rfc5280#section-4.1 */ final class Time { use DateTimeHelper; /** * Time ASN.1 type tag. */ private readonly int $type; private function __construct( protected DateTimeImmutable $dt, ?int $type ) { $this->type = $type ?? self::determineType($dt); } public static function create(DateTimeImmutable $dt, ?int $time = null): self { return new self($dt, $time); } /** * Initialize from ASN.1. */ public static function fromASN1(TimeType $el): self { // Pass the type of the original ASN.1 primitive if ($el instanceof UTCTime) { return self::create($el->dateTime(), Element::TYPE_UTC_TIME); } if ($el instanceof GeneralizedTime) { return self::create($el->dateTime(), Element::TYPE_GENERALIZED_TIME); } return self::create($el->dateTime()); // TODO: should never happen? } /** * Initialize from date string. */ public static function fromString(?string $time, ?string $tz = null): self { return self::create(self::createDateTime($time, $tz)); } public function dateTime(): DateTimeImmutable { return $this->dt; } /** * Generate ASN.1. */ public function toASN1(): TimeType { $dt = $this->dt; switch ($this->type) { case Element::TYPE_UTC_TIME: return UTCTime::create($dt); case Element::TYPE_GENERALIZED_TIME: // GeneralizedTime must not contain fractional seconds // (rfc5280 4.1.2.5.2) if ((int) $dt->format('u') !== 0) { // remove fractional seconds (round down) $dt = self::roundDownFractionalSeconds($dt); } return GeneralizedTime::create($dt); } throw new UnexpectedValueException('Time type ' . Element::tagToName($this->type) . ' not supported.'); } /** * Determine whether to use UTCTime or GeneralizedTime ASN.1 type. * * @return int Type tag */ protected static function determineType(DateTimeImmutable $dt): int { if ($dt->format('Y') >= 2050) { return Element::TYPE_GENERALIZED_TIME; } return Element::TYPE_UTC_TIME; } }
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