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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: SSHFP.php 47 2010-10-24 23:53:08Z mike.pultz $ * @link http://pear.php.net/package/Net_DNS2 * @since File available since Release 0.6.0 * */
/** * SSHFP Resource Record - RFC4255 section 3.1 * * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | algorithm | fp type | / * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / * / / * / fingerprint / * / / * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * * @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_SSHFP extends Net_DNS2_RR { /* * the algorithm used */ public $algorithm;
/* * The finger print type */ public $fp_type;
/* * the finger print data */ public $fingerprint;
/* * Algorithms */ const SSHFP_ALGORITHM_RES = 0; const SSHFP_ALGORITHM_RSA = 1; const SSHFP_ALGORITHM_DSS = 2;
/* * Fingerprint Types */ const SSHFP_FPTYPE_RES = 0; const SSHFP_FPTYPE_SHA1 = 1;
/** * method to return the rdata portion of the packet as a string * * @return string * @access protected * */ protected function rrToString() { return $this->algorithm . ' ' . $this->fp_type . ' ' . $this->fingerprint; }
/** * 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) { // // "The use of mnemonics instead of numbers is not allowed." // // RFC4255 section 3.2 // $algorithm = array_shift($rdata); $fp_type = array_shift($rdata); $fingerprint = strtolower(implode('', $rdata));
// // There are only two algorithm's defined // if ( ($algorithm != self::SSHFP_ALGORITHM_RSA) && ($algorithm != self::SSHFP_ALGORITHM_DSS) ) { return false; }
// // there's only one fingerprint type currently implemented, so if it's not // that, then fail. // if ($fp_type != self::SSHFP_FPTYPE_SHA1) { return false; }
$this->algorithm = $algorithm; $this->fp_type = $fp_type; $this->fingerprint = $fingerprint;
return true; }
/** * parses the rdata of the Net_DNS2_Packet object * * @param Net_DNS2_Packet &$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 algorithm and finger print type // $x = unpack('Calgorithm/Cfp_type', $this->rdata);
$this->algorithm = $x['algorithm']; $this->fp_type = $x['fp_type'];
// // There are only two algorithm's defined // if ( ($this->algorithm != self::SSHFP_ALGORITHM_RSA) && ($this->algorithm != self::SSHFP_ALGORITHM_DSS) ) { return false; }
// // there's only one fingerprint type currently implemented, // so if it's not that, then fail. // if ($this->fp_type != self::SSHFP_FPTYPE_SHA1) { return false; } // // parse the finger print; this assumes SHA-1 // $fp = unpack('H*a', substr($this->rdata, 2)); $this->fingerprint = strtolower($fp['a']);
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->fingerprint) > 0) {
return pack( 'CCH*', $this->algorithm, $this->fp_type, $this->fingerprint ); }
return null; } }
/* * Local variables: * tab-width: 4 * c-basic-offset: 4 * c-hanging-comment-ender-p: nil * End: */ ?>
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