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<?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
*
*/
/**
* CERT Resource Record - RFC4398 section 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | format | key tag |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | algorithm | /
* +---------------+ certificate or CRL /
* / /
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
*
* @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_CERT extends Net_DNS2_RR
{
/*
* format's allowed for certificates
*/
const CERT_FORMAT_RES = 0;
const CERT_FORMAT_PKIX = 1;
const CERT_FORMAT_SPKI = 2;
const CERT_FORMAT_PGP = 3;
const CERT_FORMAT_IPKIX = 4;
const CERT_FORMAT_ISPKI = 5;
const CERT_FORMAT_IPGP = 6;
const CERT_FORMAT_ACPKIX = 7;
const CERT_FORMAT_IACPKIX = 8;
const CERT_FORMAT_URI = 253;
const CERT_FORMAT_OID = 254;
public $cert_format_name_to_id = array();
public $cert_format_id_to_name = array(
self::CERT_FORMAT_RES => 'Reserved',
self::CERT_FORMAT_PKIX => 'PKIX',
self::CERT_FORMAT_SPKI => 'SPKI',
self::CERT_FORMAT_PGP => 'PGP',
self::CERT_FORMAT_IPKIX => 'IPKIX',
self::CERT_FORMAT_ISPKI => 'ISPKI',
self::CERT_FORMAT_IPGP => 'IPGP',
self::CERT_FORMAT_ACPKIX => 'ACPKIX',
self::CERT_FORMAT_IACPKIX => 'IACPKIX',
self::CERT_FORMAT_URI => 'URI',
self::CERT_FORMAT_OID => 'OID'
);
/*
* certificate format
*/
public $format;
/*
* key tag
*/
public $keytag;
/*
* The algorithm used for the CERt
*/
public $algorithm;
/*
* certificate
*/
public $certificate;
/**
* we have our own constructor so that we can load our certificate
* information for parsing.
*
* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from
* @param array $rr a array with parsed RR values
*
* @return
*
*/
public function __construct(Net_DNS2_Packet &$packet = null, array $rr = null)
{
parent::__construct($packet, $rr);
//
// load the lookup values
//
$this->cert_format_name_to_id = array_flip($this->cert_format_id_to_name);
}
/**
* method to return the rdata portion of the packet as a string
*
* @return string
* @access protected
*
*/
protected function rrToString()
{
return $this->format . ' ' . $this->keytag . ' ' . $this->algorithm .
' ' . base64_encode($this->certificate);
}
/**
* 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)
{
//
// load and check the format; can be an int, or a mnemonic symbol
//
$this->format = array_shift($rdata);
if (!is_numeric($this->format)) {
$mnemonic = strtoupper(trim($this->format));
if (!isset($this->cert_format_name_to_id[$mnemonic])) {
return false;
}
$this->format = $this->cert_format_name_to_id[$mnemonic];
} else {
if (!isset($this->cert_format_id_to_name[$this->format])) {
return false;
}
}
$this->keytag = array_shift($rdata);
//
// parse and check the algorithm; can be an int, or a mnemonic symbol
//
$this->algorithm = array_shift($rdata);
if (!is_numeric($this->algorithm)) {
$mnemonic = strtoupper(trim($this->algorithm));
if (!isset(Net_DNS2_Lookups::$algorithm_name_to_id[$mnemonic])) {
return false;
}
$this->algorithm = Net_DNS2_Lookups::$algorithm_name_to_id[
$mnemonic
];
} else {
if (!isset(Net_DNS2_Lookups::$algorithm_id_to_name[$this->algorithm])) {
return false;
}
}
//
// parse and base64 decode the certificate
//
// certificates MUST be provided base64 encoded, if not, everything will
// be broken after this point, as we assume it's base64 encoded.
//
$this->certificate = base64_decode(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 format, keytag and algorithm
//
$x = unpack('nformat/nkeytag/Calgorithm', $this->rdata);
$this->format = $x['format'];
$this->keytag = $x['keytag'];
$this->algorithm = $x['algorithm'];
//
// copy the certificate
//
$this->certificate = substr($this->rdata, 5, $this->rdlength - 5);
return true;
}
return false;
}
/**
* returns the rdata portion of the DNS packet
*
* @param Net_DNS2_Packet &$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->certificate) > 0) {
$data = pack('nnC', $this->format, $this->keytag, $this->algorithm) .
$this->certificate;
$packet->offset += strlen($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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