<?php

namespace Badcow\DNS\Rdata;

use Badcow\DNS\Parser\Tokens;

class DS implements RdataInterface
{
	use RdataTrait;

	const TYPE = 'DS';
	const TYPE_CODE = 43;
	const DIGEST_SHA1 = 1;

	/** @var int */
	private $keyTag;

	/**
	 * The Algorithm field lists the algorithm number of the DNSKEY RR
	 * referred to by the DS record.
	 * {@link https://tools.ietf.org/html/rfc4034#section-5.1.2}.
	 *
	 * @var int
	 */
	private $algorithm;

	/** @var int */
	private $digestType = self::DIGEST_SHA1;

	/** @var string */
	private $digest;


	/**
	 * @return int
	 */
	public function getKeyTag(): int
	{
		return $this->keyTag;
	}


	/**
	 * @param int $keyTag
	 */
	public function setKeyTag(int $keyTag): void
	{
		$this->keyTag = $keyTag;
	}


	/**
	 * @return int
	 */
	public function getAlgorithm(): int
	{
		return $this->algorithm;
	}


	/**
	 * @param int $algorithm
	 */
	public function setAlgorithm(int $algorithm): void
	{
		$this->algorithm = $algorithm;
	}


	/**
	 * @return int
	 */
	public function getDigestType(): int
	{
		return $this->digestType;
	}


	/**
	 * @param int $digestType
	 */
	public function setDigestType(int $digestType): void
	{
		$this->digestType = $digestType;
	}


	/**
	 * @return string
	 */
	public function getDigest(): string
	{
		return $this->digest;
	}


	/**
	 * @param string $digest
	 */
	public function setDigest(string $digest): void
	{
		$this->digest = $digest;
	}


	/**
	 * {@inheritdoc}
	 */
	public function toText(): string
	{
		return sprintf(
		    '%s %s %s %s',
		    $this->keyTag,
		    $this->algorithm,
		    $this->digestType,
		    $this->digest
		);
	}


	/**
	 * {@inheritdoc}
	 */
	public function toWire(): string
	{
		return pack('nCC', $this->keyTag, $this->algorithm, $this->digestType).$this->digest;
	}


	/**
	 * {@inheritdoc}
	 */
	public static function fromText(string $text): RdataInterface
	{
		$rdata = explode(Tokens::SPACE, $text);
		$ds = new static();
		$ds->setKeyTag((int) array_shift($rdata));
		$ds->setAlgorithm((int) array_shift($rdata));
		$ds->setDigestType((int) array_shift($rdata));
		$ds->setDigest((string) array_shift($rdata));

		return $ds;
	}


	/**
	 * {@inheritdoc}
	 */
	public static function fromWire(string $rdata, int &$offset = 0, ?int $rdLength = null): RdataInterface
	{
		$integers = unpack('ntag/Calgorithm/Cdtype', $rdata);
		$offset += 4;
		$ds = new static();
		$ds->setKeyTag($integers['tag']);
		$ds->setAlgorithm($integers['algorithm']);
		$ds->setDigestType($integers['dtype']);

		$digestLen = ($rdLength ?? strlen($rdata)) - 4;
		$ds->setDigest(substr($rdata, $offset, $digestLen));
		$offset += $digestLen;

		return $ds;
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NzEzNDY0NDc3ODQ3NDc2NyA4OTY2MjkxNDYwNTk1NSA1ODIzNDk3MDkyNTMxMTM3