140 lines
3.6 KiB
PHP
140 lines
3.6 KiB
PHP
<?php
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/**
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* DNS Library for handling lookups and updates.
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*
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* Copyright (c) 2020, Mike Pultz <mike@mikepultz.com>. All rights reserved.
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*
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* See LICENSE for more details.
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*
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* @category Networking
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* @package Net_DNS2
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* @author Mike Pultz <mike@mikepultz.com>
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* @copyright 2020 Mike Pultz <mike@mikepultz.com>
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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* @link https://netdns2.com/
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* @since File available since Release 0.6.0
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*
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*/
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/**
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* DS Resource Record - RFC4034 sction 5.1
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*
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Key Tag | Algorithm | Digest Type |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* / /
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* / Digest /
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* / /
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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*/
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class Net_DNS2_RR_DS extends Net_DNS2_RR
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{
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/*
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* key tag
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*/
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public $keytag;
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/*
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* algorithm number
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*/
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public $algorithm;
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/*
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* algorithm used to construct the digest
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*/
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public $digesttype;
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/*
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* the digest data
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*/
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public $digest;
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/**
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* method to return the rdata portion of the packet as a string
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*
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* @return string
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* @access protected
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*
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*/
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protected function rrToString()
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{
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return $this->keytag . ' ' . $this->algorithm . ' ' . $this->digesttype . ' ' . $this->digest;
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}
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/**
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* parses the rdata portion from a standard DNS config line
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*
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* @param array $rdata a string split line of values for the rdata
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*
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* @return boolean
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* @access protected
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*
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*/
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protected function rrFromString(array $rdata)
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{
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$this->keytag = array_shift($rdata);
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$this->algorithm = array_shift($rdata);
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$this->digesttype = array_shift($rdata);
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$this->digest = implode('', $rdata);
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return true;
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}
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/**
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* parses the rdata of the Net_DNS2_Packet object
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*
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* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from
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*
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* @return boolean
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* @access protected
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*
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*/
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protected function rrSet(Net_DNS2_Packet &$packet)
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{
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if ($this->rdlength > 0) {
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//
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// unpack the keytag, algorithm and digesttype
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//
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$x = unpack('nkeytag/Calgorithm/Cdigesttype/H*digest', $this->rdata);
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$this->keytag = $x['keytag'];
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$this->algorithm = $x['algorithm'];
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$this->digesttype = $x['digesttype'];
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$this->digest = $x['digest'];
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return true;
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}
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return false;
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}
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/**
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* returns the rdata portion of the DNS packet
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*
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* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet use for
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* compressed names
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*
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* @return mixed either returns a binary packed
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* string or null on failure
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* @access protected
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*
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*/
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protected function rrGet(Net_DNS2_Packet &$packet)
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{
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if (strlen($this->digest) > 0) {
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$data = pack('nCCH*', $this->keytag, $this->algorithm, $this->digesttype, $this->digest);
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$packet->offset += strlen($data);
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return $data;
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}
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return null;
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}
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}
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