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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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* DNS Library for handling lookups and updates.
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* Copyright (c) 2010, Mike Pultz <mike@mikepultz.com>.
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* All rights reserved.
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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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* * 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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* * 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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* * 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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* 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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* @category Networking
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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: NSEC3.php 179 2012-11-23 05:49:01Z mike.pultz $
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* @link http://pear.php.net/package/Net_DNS2
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* @since File available since Release 0.6.0
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* NSEC3 Resource Record - RFC5155 section 3.2
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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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* | Hash Alg. | Flags | Iterations |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Salt Length | Salt /
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Hash Length | Next Hashed Owner Name /
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* @category Networking
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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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class Net_DNS2_RR_NSEC3 extends Net_DNS2_RR
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* defines the number of additional times the hash is performed.
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* the length of the salt- not displayed
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* the length of the hash value
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* the hashed value of the owner name
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public $hashed_owner_name;
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* array of RR type names
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public $type_bit_maps = array();
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* method to return the rdata portion of the packet as a string
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protected function rrToString()
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$out = $this->algorithm . ' ' . $this->flags . ' ' . $this->iterations . ' ';
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// per RFC5155, the salt_length value isn't displayed, and if the salt
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// is empty, the salt is displayed as '-'
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if ($this->salt_length > 0) {
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// per RFC5255 the hash length isn't shown
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$out .= ' ' . $this->hashed_owner_name;
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foreach ($this->type_bit_maps as $rr) {
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$out .= ' ' . strtoupper($rr);
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* parses the rdata portion from a standard DNS config line
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* @param array $rdata a string split line of values for the rdata
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protected function rrFromString(array $rdata)
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$this->algorithm = array_shift($rdata);
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$this->flags = array_shift($rdata);
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$this->iterations = array_shift($rdata);
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// an empty salt is represented as '-' per RFC5155 section 3.3
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$salt = array_shift($rdata);
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$this->salt_length = 0;
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$this->salt_length = strlen(pack('H*', $salt));
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$this->salt = strtoupper($salt);
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$this->hashed_owner_name = array_shift($rdata);
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$this->hash_length = strlen(base64_decode($this->hashed_owner_name));
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$this->type_bit_maps = $rdata;
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* parses the rdata of the Net_DNS2_Packet object
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* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from
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protected function rrSet(Net_DNS2_Packet &$packet)
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if ($this->rdlength > 0) {
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// unpack the first values
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$x = unpack('Calgorithm/Cflags/niterations/Csalt_length', $this->rdata);
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$this->algorithm = $x['algorithm'];
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$this->flags = $x['flags'];
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$this->iterations = $x['iterations'];
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$this->salt_length = $x['salt_length'];
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if ($this->salt_length > 0) {
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$x = unpack('H*', substr($this->rdata, $offset, $this->salt_length));
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$this->salt = strtoupper($x[1]);
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$offset += $this->salt_length;
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// unpack the hash length
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$x = unpack('@' . $offset . '/Chash_length', $this->rdata);
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$this->hash_length = $x['hash_length'];
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if ($this->hash_length > 0) {
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$this->hashed_owner_name = base64_encode(
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substr($this->rdata, $offset, $this->hash_length)
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$offset += $this->hash_length;
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// parse out the RR bitmap
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$this->type_bit_maps = Net_DNS2_BitMap::bitMapToArray(
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substr($this->rdata, $offset)
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* returns the rdata portion of the DNS packet
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* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet use for
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* @return mixed either returns a binary packed
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* string or null on failure
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protected function rrGet(Net_DNS2_Packet &$packet)
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// pull the salt and build the length
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$salt = pack('H*', $this->salt);
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$this->salt_length = strlen($salt);
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// pack the algorithm, flags, iterations and salt length
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$this->algorithm, $this->flags, $this->iterations, $this->salt_length
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// add the hash length and hash
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$data .= chr($this->hash_length);
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if ($this->hash_length > 0) {
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$data .= base64_decode($this->hashed_owner_name);
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// conver the array of RR names to a type bitmap
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$data .= Net_DNS2_BitMap::arrayToBitMap($this->type_bit_maps);
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$packet->offset += strlen($data);
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* c-hanging-comment-ender-p: nil
added
removed
Net_DNS2-1.3.2/Net/DNS2/RR/NSEC3.php
