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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 2011 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 1.1.0
*
*/
/**
* SSL Private Key container class
*
* @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
*
*/
class Net_DNS2_PrivateKey
{
/*
* the filename that was loaded; stored for reference
*/
public $filename;
/*
* the keytag for the signature
*/
public $keytag;
/*
* the sign name for the signature
*/
public $signname;
/*
* the algorithm used for the signature
*/
public $algorithm;
/*
* the key format fo the signature
*/
public $key_format;
/*
* the openssl private key id
*/
public $instance;
/*
* RSA: modulus
*/
private $_modulus;
/*
* RSA: public exponent
*/
private $_public_exponent;
/*
* RSA: rivate exponent
*/
private $_private_exponent;
/*
* RSA: prime1
*/
private $_prime1;
/*
* RSA: prime2
*/
private $_prime2;
/*
* RSA: exponent 1
*/
private $_exponent1;
/*
* RSA: exponent 2
*/
private $_exponent2;
/*
* RSA: coefficient
*/
private $_coefficient;
/*
* DSA: prime
*/
public $prime;
/*
* DSA: subprime
*/
public $subprime;
/*
* DSA: base
*/
public $base;
/*
* DSA: private value
*/
public $private_value;
/*
* DSA: public value
*/
public $public_value;
/**
* Constructor - base constructor the private key container class
*
* @param string $file path to a private-key file to parse and load
*
* @throws Net_DNS2_Exception
* @access public
*
*/
public function __construct($file = null)
{
if (isset($file)) {
$this->parseFile($file);
}
}
/**
* parses a private key file generated by dnssec-keygen
*
* @param string $file path to a private-key file to parse and load
*
* @return boolean
* @throws Net_DNS2_Exception
* @access public
*
*/
public function parseFile($file)
{
//
// check for OpenSSL
//
if (extension_loaded('openssl') === false) {
throw new Net_DNS2_Exception(
'the OpenSSL extension is required to use parse private key.',
Net_DNS2_Lookups::E_OPENSSL_UNAVAIL
);
}
//
// check to make sure the file exists
//
if (is_readable($file) == false) {
throw new Net_DNS2_Exception(
'invalid private key file: ' . $file,
Net_DNS2_Lookups::E_OPENSSL_INV_PKEY
);
}
//
// get the base filename, and parse it for the local value
//
$keyname = basename($file);
if (strlen($keyname) == 0) {
throw new Net_DNS2_Exception(
'failed to get basename() for: ' . $file,
Net_DNS2_Lookups::E_OPENSSL_INV_PKEY
);
}
//
// parse the keyname
//
if (preg_match("/K(.*)\.\+(\d{3})\+(\d*)\.private/", $keyname, $matches)) {
$this->signname = $matches[1];
$this->algorithm = intval($matches[2]);
$this->keytag = intval($matches[3]);
} else {
throw new Net_DNS2_Exception(
'file ' . $keyname . ' does not look like a private key file!',
Net_DNS2_Lookups::E_OPENSSL_INV_PKEY
);
}
//
// read all the data from the
//
$data = file($file, FILE_IGNORE_NEW_LINES|FILE_SKIP_EMPTY_LINES);
if (count($data) == 0) {
throw new Net_DNS2_Exception(
'file ' . $keyname . ' is empty!',
Net_DNS2_Lookups::E_OPENSSL_INV_PKEY
);
}
foreach ($data as $line) {
list($key, $value) = explode(':', $line);
$key = trim($key);
$value = trim($value);
switch(strtolower($key)) {
case 'private-key-format':
$this->_key_format = $value;
break;
case 'algorithm':
if ($this->algorithm != $value) {
throw new Net_DNS2_Exception(
'Algorithm mis-match! filename is ' . $this->algorithm .
', contents say ' . $value,
Net_DNS2_Lookups::E_OPENSSL_INV_ALGO
);
}
break;
//
// RSA
//
case 'modulus':
$this->_modulus = $value;
break;
case 'publicexponent':
$this->_public_exponent = $value;
break;
case 'privateexponent':
$this->_private_exponent = $value;
break;
case 'prime1':
$this->_prime1 = $value;
break;
case 'prime2':
$this->_prime2 = $value;
break;
case 'exponent1':
$this->_exponent1 = $value;
break;
case 'exponent2':
$this->_exponent2 = $value;
break;
case 'coefficient':
$this->_coefficient = $value;
break;
//
// DSA - this won't work in PHP until the OpenSSL extension is better
//
case 'prime(p)':
$this->prime = $value;
break;
case 'subprime(q)':
$this->subprime = $value;
break;
case 'base(g)':
$this->base = $value;
break;
case 'private_value(x)':
$this->private_value = $value;
break;
case 'public_value(y)':
$this->public_value = $value;
break;
default:
throw new Net_DNS2_Exception(
'unknown private key data: ' . $key . ': ' . $value,
Net_DNS2_Lookups::E_OPENSSL_INV_PKEY
);
}
}
//
// generate the private key
//
$args = array();
switch($this->algorithm) {
//
// RSA
//
case Net_DNS2_Lookups::DNSSEC_ALGORITHM_RSAMD5:
case Net_DNS2_Lookups::DNSSEC_ALGORITHM_RSASHA1:
case Net_DNS2_Lookups::DNSSEC_ALGORITHM_RSASHA256:
case Net_DNS2_Lookups::DNSSEC_ALGORITHM_RSASHA512:
$args = array(
'rsa' => array(
'n' => base64_decode($this->_modulus),
'e' => base64_decode($this->_public_exponent),
'd' => base64_decode($this->_private_exponent),
'p' => base64_decode($this->_prime1),
'q' => base64_decode($this->_prime2),
'dmp1' => base64_decode($this->_exponent1),
'dmq1' => base64_decode($this->_exponent2),
'iqmp' => base64_decode($this->_coefficient)
)
);
break;
//
// DSA - this won't work in PHP until the OpenSSL extension is better
//
case Net_DNS2_Lookups::DNSSEC_ALGORITHM_DSA:
$args = array(
'dsa' => array(
'p' => base64_decode($this->prime),
'q' => base64_decode($this->subprime),
'g' => base64_decode($this->base),
'priv_key' => base64_decode($this->private_value),
'pub_key' => base64_decode($this->public_value)
)
);
break;
default:
throw new Net_DNS2_Exception(
'we only currently support RSAMD5 and RSASHA1 encryption.',
Net_DNS2_Lookups::E_OPENSSL_INV_PKEY
);
}
//
// generate and store the key
//
$this->instance = openssl_pkey_new($args);
if ($this->instance === false) {
throw new Net_DNS2_Exception(
openssl_error_string(),
Net_DNS2_Lookups::E_OPENSSL_ERROR
);
}
//
// store the filename incase we need it for something
//
$this->filename = $file;
return true;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* c-hanging-comment-ender-p: nil
* End:
*/
?>
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