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| Current File : //opt/cpanel/ea-php54/root/usr/share/pear/Net/DNS2/RR/DS.php |
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* DNS Library for handling lookups and updates.
*
* PHP Version 5
*
* Copyright (c) 2010, Mike Pultz <mike@mikepultz.com>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Mike Pultz nor the names of his contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @category Networking
* @package Net_DNS2
* @author Mike Pultz <mike@mikepultz.com>
* @copyright 2010 Mike Pultz <mike@mikepultz.com>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version SVN: $Id$
* @link http://pear.php.net/package/Net_DNS2
* @since File available since Release 0.6.0
*
*/
/**
* DS Resource Record - RFC4034 sction 5.1
*
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Key Tag | Algorithm | Digest Type |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* / /
* / Digest /
* / /
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* @category Networking
* @package Net_DNS2
* @author Mike Pultz <mike@mikepultz.com>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @link http://pear.php.net/package/Net_DNS2
* @see Net_DNS2_RR
*
*/
class Net_DNS2_RR_DS extends Net_DNS2_RR
{
/*
* key tag
*/
public $keytag;
/*
* algorithm number
*/
public $algorithm;
/*
* algorithm used to construct the digest
*/
public $digesttype;
/*
* the digest data
*/
public $digest;
/**
* method to return the rdata portion of the packet as a string
*
* @return string
* @access protected
*
*/
protected function rrToString()
{
return $this->keytag . ' ' . $this->algorithm . ' ' .
$this->digesttype . ' ' . $this->digest;
}
/**
* 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)
{
$this->keytag = array_shift($rdata);
$this->algorithm = array_shift($rdata);
$this->digesttype = array_shift($rdata);
$this->digest = implode('', $rdata);
return true;
}
/**
* parses the rdata of the Net_DNS2_Packet object
*
* @param Net_DNS2_Packet &$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) {
//
// unpack the keytag, algorithm and digesttype
//
$x = unpack('nkeytag/Calgorithm/Cdigesttype', $this->rdata);
$this->keytag = $x['keytag'];
$this->algorithm = $x['algorithm'];
$this->digesttype = $x['digesttype'];
//
// figure out the digest size
//
$digest_size = 0;
if ($this->digesttype == 1) {
$digest_size = 20; // SHA1
} else if ($this->digesttype == 2) {
$digest_size = 32; // SHA256
}
//
// copy the digest
//
$x = unpack('H*', substr($this->rdata, 4, $digest_size));
$this->digest = $x[1];
return true;
}
return false;
}
/**
* returns the rdata portion of the DNS packet
*
* @param Net_DNS2_Packet &$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 &$packet)
{
if (strlen($this->digest) > 0) {
$data = pack(
'nCCH*',
$this->keytag, $this->algorithm, $this->digesttype, $this->digest
);
$packet->offset += strlen($data);
return $data;
}
return null;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* c-hanging-comment-ender-p: nil
* End:
*/
?>
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