mirror of
https://github.com/privacy-protection-tools/anti-AD.git
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288 lines
8.6 KiB
PHP
288 lines
8.6 KiB
PHP
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* DNS Library for handling lookups and updates.
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*
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* PHP Version 5
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*
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* Copyright (c) 2010, Mike Pultz <mike@mikepultz.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* * Neither the name of Mike Pultz nor the names of his contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 2010 Mike Pultz <mike@mikepultz.com>
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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* @version SVN: $Id$
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* @link http://pear.php.net/package/Net_DNS2
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* @since File available since Release 1.0.0
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*
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*/
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/**
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* HIP Resource Record - RFC5205 section 5
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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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* | HIT length | PK algorithm | PK length |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | |
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* ~ HIT ~
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* | |
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* + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | | |
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* +-+-+-+-+-+-+-+-+-+-+-+ +
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* | Public Key |
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* ~ ~
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* | |
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* + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +
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* | |
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* ~ Rendezvous Servers ~
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* | |
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* + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | |
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* +-+-+-+-+-+-+-+
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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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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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* @link http://pear.php.net/package/Net_DNS2
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* @see Net_DNS2_RR
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*
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*/
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class Net_DNS2_RR_HIP extends Net_DNS2_RR
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{
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/*
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* The length of the HIT field
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*/
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public $hit_length;
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/*
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* the public key cryptographic algorithm
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*/
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public $pk_algorithm;
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/*
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* the length of the public key field
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*/
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public $pk_length;
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/*
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* The HIT is stored as a binary value in network byte order.
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*/
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public $hit;
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/*
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* The public key
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*/
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public $public_key;
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/*
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* a list of rendezvous servers
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*/
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public $rendezvous_servers = array();
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/**
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* method to return the rdata portion of the packet as a string
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*
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* @return string
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* @access protected
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*
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*/
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protected function rrToString()
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{
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$out = $this->pk_algorithm . ' ' .
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$this->hit . ' ' . $this->public_key . ' ';
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foreach ($this->rendezvous_servers as $index => $server) {
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$out .= $server . '. ';
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}
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return trim($out);
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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->pk_algorithm = array_shift($rdata);
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$this->hit = strtoupper(array_shift($rdata));
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$this->public_key = array_shift($rdata);
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//
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// anything left on the array, must be one or more rendezevous servers. add
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// them and strip off the trailing dot
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//
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if (count($rdata) > 0) {
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$this->rendezvous_servers = preg_replace('/\.$/', '', $rdata);
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}
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//
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// store the lengths;
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//
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$this->hit_length = strlen(pack('H*', $this->hit));
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$this->pk_length = strlen(base64_decode($this->public_key));
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return true;
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}
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/**
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* parses the rdata of the Net_DNS2_Packet object
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*
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* @param Net_DNS2_Packet &$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 algorithm and length values
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//
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$x = unpack('Chit_length/Cpk_algorithm/npk_length', $this->rdata);
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$this->hit_length = $x['hit_length'];
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$this->pk_algorithm = $x['pk_algorithm'];
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$this->pk_length = $x['pk_length'];
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$offset = 4;
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//
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// copy out the HIT value
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//
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$hit = unpack('H*', substr($this->rdata, $offset, $this->hit_length));
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$this->hit = strtoupper($hit[1]);
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$offset += $this->hit_length;
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//
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// copy out the public key
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//
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$this->public_key = base64_encode(
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substr($this->rdata, $offset, $this->pk_length)
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);
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$offset += $this->pk_length;
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//
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// copy out any possible rendezvous servers
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//
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$offset = $packet->offset + $offset;
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while ( ($offset - $packet->offset) < $this->rdlength) {
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$this->rendezvous_servers[] = Net_DNS2_Packet::expand(
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$packet, $offset
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);
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}
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return true;
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}
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return false;
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}
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/**
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* returns the rdata portion of the DNS packet
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*
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* @param Net_DNS2_Packet &$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->hit) > 0) && (strlen($this->public_key) > 0) ) {
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//
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// pack the length, algorithm and HIT values
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//
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$data = pack(
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'CCnH*',
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$this->hit_length,
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$this->pk_algorithm,
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$this->pk_length,
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$this->hit
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);
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//
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// add the public key
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//
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$data .= base64_decode($this->public_key);
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//
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// add the offset
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//
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$packet->offset += strlen($data);
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//
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// add each rendezvous server
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//
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foreach ($this->rendezvous_servers as $index => $server) {
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$data .= $packet->compress($server, $packet->offset);
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}
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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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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* c-hanging-comment-ender-p: nil
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* End:
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*/
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?>
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