173 lines
4.3 KiB
PHP
173 lines
4.3 KiB
PHP
<?php
|
|
|
|
/**
|
|
* DNS Library for handling lookups and updates.
|
|
*
|
|
* Copyright (c) 2020, Mike Pultz <mike@mikepultz.com>. All rights reserved.
|
|
*
|
|
* See LICENSE for more details.
|
|
*
|
|
* @category Networking
|
|
* @package Net_DNS2
|
|
* @author Mike Pultz <mike@mikepultz.com>
|
|
* @copyright 2020 Mike Pultz <mike@mikepultz.com>
|
|
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
|
|
* @link https://netdns2.com/
|
|
* @since File available since Release 0.6.0
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* NSEC3PARAM Resource Record - RFC5155 section 4.2
|
|
*
|
|
* 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
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Hash Alg. | Flags | Iterations |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Salt Length | Salt /
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*
|
|
*/
|
|
class Net_DNS2_RR_NSEC3PARAM extends Net_DNS2_RR
|
|
{
|
|
/*
|
|
* Algorithm to use
|
|
*
|
|
* TODO: same as the NSEC3
|
|
*/
|
|
public $algorithm;
|
|
|
|
/*
|
|
* flags
|
|
*/
|
|
public $flags;
|
|
|
|
/*
|
|
* defines the number of additional times the hash is performed.
|
|
*/
|
|
public $iterations;
|
|
|
|
/*
|
|
* the length of the salt- not displayed
|
|
*/
|
|
public $salt_length;
|
|
|
|
/*
|
|
* the salt
|
|
*/
|
|
public $salt;
|
|
|
|
/**
|
|
* method to return the rdata portion of the packet as a string
|
|
*
|
|
* @return string
|
|
* @access protected
|
|
*
|
|
*/
|
|
protected function rrToString()
|
|
{
|
|
$out = $this->algorithm . ' ' . $this->flags . ' ' . $this->iterations . ' ';
|
|
|
|
//
|
|
// per RFC5155, the salt_length value isn't displayed, and if the salt
|
|
// is empty, the salt is displayed as "-"
|
|
//
|
|
if ($this->salt_length > 0) {
|
|
|
|
$out .= $this->salt;
|
|
} else {
|
|
|
|
$out .= '-';
|
|
}
|
|
|
|
return $out;
|
|
}
|
|
|
|
/**
|
|
* parses the rdata portion from a standard DNS config line
|
|
*
|
|
* @param array $rdata a string split line of values for the rdata
|
|
*
|
|
* @return boolean
|
|
* @access protected
|
|
*
|
|
*/
|
|
protected function rrFromString(array $rdata)
|
|
{
|
|
$this->algorithm = array_shift($rdata);
|
|
$this->flags = array_shift($rdata);
|
|
$this->iterations = array_shift($rdata);
|
|
|
|
$salt = array_shift($rdata);
|
|
if ($salt == '-') {
|
|
|
|
$this->salt_length = 0;
|
|
$this->salt = '';
|
|
} else {
|
|
|
|
$this->salt_length = strlen(pack('H*', $salt));
|
|
$this->salt = strtoupper($salt);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* parses the rdata of the Net_DNS2_Packet object
|
|
*
|
|
* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from
|
|
*
|
|
* @return boolean
|
|
* @access protected
|
|
*
|
|
*/
|
|
protected function rrSet(Net_DNS2_Packet &$packet)
|
|
{
|
|
if ($this->rdlength > 0) {
|
|
|
|
$x = unpack('Calgorithm/Cflags/niterations/Csalt_length', $this->rdata);
|
|
|
|
$this->algorithm = $x['algorithm'];
|
|
$this->flags = $x['flags'];
|
|
$this->iterations = $x['iterations'];
|
|
$this->salt_length = $x['salt_length'];
|
|
|
|
if ($this->salt_length > 0) {
|
|
|
|
$x = unpack('H*', substr($this->rdata, 5, $this->salt_length));
|
|
$this->salt = strtoupper($x[1]);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* returns the rdata portion of the DNS packet
|
|
*
|
|
* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet use for
|
|
* compressed names
|
|
*
|
|
* @return mixed either returns a binary packed
|
|
* string or null on failure
|
|
* @access protected
|
|
*
|
|
*/
|
|
protected function rrGet(Net_DNS2_Packet &$packet)
|
|
{
|
|
$salt = pack('H*', $this->salt);
|
|
$this->salt_length = strlen($salt);
|
|
|
|
$data = pack(
|
|
'CCnC',
|
|
$this->algorithm, $this->flags, $this->iterations, $this->salt_length
|
|
) . $salt;
|
|
|
|
$packet->offset += strlen($data);
|
|
|
|
return $data;
|
|
}
|
|
}
|