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<?php
declare(strict_types=1);
/*
* This file is part of Badcow DNS Library.
*
* (c) Samuel Williams <sam@badcow.co>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Badcow\DNS\Rdata;
use Badcow\DNS\Message;
use Badcow\DNS\Parser\Tokens;
use InvalidArgumentException;
class DS implements RdataInterface
{
use RdataTrait;
public const TYPE = 'DS';
public const TYPE_CODE = 43;
public 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;
public function getKeyTag(): int
{
return $this->keyTag;
}
public function setKeyTag(int $keyTag): void
{
$this->keyTag = $keyTag;
}
public function getAlgorithm(): int
{
return $this->algorithm;
}
public function setAlgorithm(int $algorithm): void
{
$this->algorithm = $algorithm;
}
public function getDigestType(): int
{
return $this->digestType;
}
public function setDigestType(int $digestType): void
{
$this->digestType = $digestType;
}
/**
* @return string the digest in its binary representation
*/
public function getDigest(): string
{
return $this->digest;
}
/**
* @param string $digest the digest in its binary representation
*/
public function setDigest(string $digest): void
{
$this->digest = $digest;
}
/**
* Calculates the digest by concatenating the canonical form of the fully qualified owner name of the DNSKEY RR with
* the DNSKEY RDATA, and then applying the digest algorithm.
*
* @param string $owner canonical form of the fully qualified owner name of the DNSKEY RR
* @param DNSKEY $dnskey Owner's DNSKEY
*/
public function calculateDigest(string $owner, DNSKEY $dnskey): void
{
if (static::DIGEST_SHA1 !== $this->digestType) {
throw new InvalidArgumentException('Can only calculate SHA-1 digests.');
}
$this->digest = sha1(Message::encodeName(strtolower($owner)).$dnskey->toWire(), true);
}
public function toText(): string
{
return sprintf(
'%s %s %s %s',
$this->keyTag,
$this->algorithm,
$this->digestType,
strtoupper(bin2hex($this->digest))
);
}
public function toWire(): string
{
return pack('nCC', $this->keyTag, $this->algorithm, $this->digestType).$this->digest;
}
public function fromText(string $text): void
{
$rdata = explode(Tokens::SPACE, $text);
$this->setKeyTag((int) array_shift($rdata));
$this->setAlgorithm((int) array_shift($rdata));
$this->setDigestType((int) array_shift($rdata));
if (false === $digest = hex2bin((string) array_shift($rdata))) {
throw new InvalidArgumentException(sprintf('The digest is not a valid hexadecimal string.'));
}
$this->setDigest($digest);
}
public function fromWire(string $rdata, int &$offset = 0, ?int $rdLength = null): void
{
$digestLen = ($rdLength ?? strlen($rdata)) - 4;
if (false === $integers = unpack('ntag/Calgorithm/Cdtype', $rdata, $offset)) {
throw new DecodeException(static::TYPE, $rdata);
}
$offset += 4;
$this->setKeyTag($integers['tag']);
$this->setAlgorithm($integers['algorithm']);
$this->setDigestType($integers['dtype']);
$this->setDigest(substr($rdata, $offset, $digestLen));
$offset += $digestLen;
}
}
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| A.php | File | 1.94 KB | 0644 |
|
| AAAA.php | File | 1.07 KB | 0644 |
|
| AFSDB.php | File | 2.2 KB | 0644 |
|
| APL.php | File | 4.12 KB | 0644 |
|
| CAA.php | File | 4.06 KB | 0644 |
|
| CDNSKEY.php | File | 450 B | 0644 |
|
| CDS.php | File | 431 B | 0644 |
|
| CERT.php | File | 5.49 KB | 0644 |
|
| CNAME.php | File | 1.33 KB | 0644 |
|
| CSYNC.php | File | 2.46 KB | 0644 |
|
| DHCID.php | File | 5.65 KB | 0644 |
|
| DLV.php | File | 455 B | 0644 |
|
| DNAME.php | File | 674 B | 0644 |
|
| DNSKEY.php | File | 1.02 KB | 0644 |
|
| DS.php | File | 3.93 KB | 0644 |
|
| DecodeException.php | File | 933 B | 0644 |
|
| Factory.php | File | 17.37 KB | 0644 |
|
| HINFO.php | File | 2.19 KB | 0644 |
|
| HIP.php | File | 4.4 KB | 0644 |
|
| IPSECKEY.php | File | 9.34 KB | 0644 |
|
| KEY.php | File | 3.25 KB | 0644 |
|
| KX.php | File | 2.45 KB | 0644 |
|
| LOC.php | File | 7.36 KB | 0644 |
|
| MX.php | File | 2.46 KB | 0644 |
|
| NAPTR.php | File | 7.06 KB | 0644 |
|
| NS.php | File | 442 B | 0644 |
|
| NSEC.php | File | 4.13 KB | 0644 |
|
| NSEC3.php | File | 8.09 KB | 0644 |
|
| NSEC3PARAM.php | File | 3.65 KB | 0644 |
|
| OPT.php | File | 2.79 KB | 0644 |
|
| PTR.php | File | 4.24 KB | 0644 |
|
| PolymorphicRdata.php | File | 2.02 KB | 0644 |
|
| RP.php | File | 1.82 KB | 0644 |
|
| RRSIG.php | File | 8.04 KB | 0644 |
|
| RdataInterface.php | File | 1.7 KB | 0644 |
|
| RdataTrait.php | File | 803 B | 0644 |
|
| SIG.php | File | 378 B | 0644 |
|
| SOA.php | File | 5.78 KB | 0644 |
|
| SPF.php | File | 432 B | 0644 |
|
| SRV.php | File | 4.61 KB | 0644 |
|
| SSHFP.php | File | 3.36 KB | 0644 |
|
| TA.php | File | 441 B | 0644 |
|
| TKEY.php | File | 7.41 KB | 0644 |
|
| TLSA.php | File | 4.69 KB | 0644 |
|
| TSIG.php | File | 6.5 KB | 0644 |
|
| TXT.php | File | 3.44 KB | 0644 |
|
| Types.php | File | 10.33 KB | 0644 |
|
| URI.php | File | 3.67 KB | 0644 |
|
| UnknownType.php | File | 2.2 KB | 0644 |
|
| UnsupportedTypeException.php | File | 477 B | 0644 |
|