mirror of
https://github.com/usmannasir/cyberpanel.git
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739 lines
19 KiB
PHP
739 lines
19 KiB
PHP
<?php
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/**
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* jCryption
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*
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* PHP versions 4 and 5
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*
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* LICENSE: This source file is subject to version 3.0 of the PHP license
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* that is available through the world-wide-web at the following URI:
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* http://www.php.net/license/3_0.txt. If you did not receive a copy of
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* the PHP License and are unable to obtain it through the web, please
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* send a note to license@php.net so we can mail you a copy immediately.
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*
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* Many of the functions in this class are from the PEAR Crypt_RSA package ...
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* So most of the credits goes to the original creator of this package Alexander Valyalkin
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* you can get the package under http://pear.php.net/package/Crypt_RSA
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*
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* I just changed, added, removed and improved some functions to fit the needs of jCryption
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*
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* @author Daniel Griesser <daniel.griesser@jcryption.org>
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* @copyright 2010 Daniel Griesser
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* @license http://www.php.net/license/3_0.txt PHP License 3.0
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* @version 1.1
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* @link http://jcryption.org/
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*/
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class jCryption
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{
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private $_key_len;
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private $_e;
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/**
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* Constructor
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*
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* @access public
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*/
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public function __construct($e = "\x01\x00\x01")
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{
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$this->_e = $e;
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}
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/**
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* Generates the Keypair with the given keyLength the encryption key e ist set staticlly
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* set to 65537 for faster encryption.
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*
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* @param int $keyLength
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* @return array
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* @access public
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*/
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public function generateKeypair($keyLength)
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{
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$this->_key_len = intval($keyLength);
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if ($this->_key_len < 8) {
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$this->_key_len = 8;
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}
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// set [e] to 0x10001 (65537)
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$e = $this->bin2int($this->_e);
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// generate [p], [q] and [n]
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$p_len = intval(($this->_key_len + 1) / 2);
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$q_len = $this->_key_len - $p_len;
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$p1 = $q1 = 0;
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do {
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// generate prime number [$p] with length [$p_len] with the following condition:
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// GCD($e, $p - 1) = 1
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do {
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$p = $this->getPrime($p_len);
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$p1 = $this->dec($p);
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$tmp = $this->GCD($e, $p1);
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} while (!$this->isOne($tmp));
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// generate prime number [$q] with length [$q_len] with the following conditions:
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// GCD($e, $q - 1) = 1
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// $q != $p
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do {
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$q = $this->getPrime($q_len);
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//$q = 102238965184417281201422828818276460200050705922822343263269460146519295919831;
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$q1 = $this->dec($q);
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$tmp = $this->GCD($e, $q1);
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} while (!$this->isOne($tmp) && !$this->cmpAbs($q, $p));
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// if (p < q), then exchange them
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if ($this->cmpAbs($p, $q) < 0) {
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$tmp = $p;
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$p = $q;
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$q = $tmp;
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$tmp = $p1;
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$p1 = $q1;
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$q1 = $tmp;
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}
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// calculate n = p * q
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$n = $this->mul($p, $q);
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} while ($this->bitLen($n) != $this->_key_len);
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// calculate d = 1/e mod (p - 1) * (q - 1)
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$pq = $this->mul($p1, $q1);
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$d = $this->invmod($e, $pq);
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// store RSA keypair attributes
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$keypair = array('n' => $n, 'e' => $e, 'd' => $d, 'p' => $p, 'q' => $q);
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return $keypair;
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}
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public function useKeys($keys, $keyLength)
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{
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$this->_key_len = intval($keyLength);
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if ($this->_key_len < 8) {
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$this->_key_len = 8;
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}
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// set [e] to 0x10001 (65537)
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$e = $this->bin2int($this->_e);
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// generate [p], [q] and [n]
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$p_len = intval(($this->_key_len + 1) / 2);
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$q_len = $this->_key_len - $p_len;
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$p1 = $q1 = 0;
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do {
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do {
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$q = $keys[rand(0, count($keys))];
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$p = $keys[rand(0, count($keys))];
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$p1 = $this->dec($p);
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$q1 = $this->dec($q);
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} while (!$this->cmpAbs($q, $p));
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// if (p < q), then exchange them
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if ($this->cmpAbs($p, $q) < 0) {
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$tmp = $p;
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$p = $q;
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$q = $tmp;
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$tmp = $p1;
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$p1 = $q1;
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$q1 = $tmp;
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}
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// calculate n = p * q
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$n = $this->mul($p, $q);
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} while ($this->bitLen($n) != $this->_key_len);
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// calculate d = 1/e mod (p - 1) * (q - 1)
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$pq = $this->mul($p1, $q1);
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$d = $this->invmod($e, $pq);
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// store RSA keypair attributes
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$keypair = array('n' => $n, 'e' => $e, 'd' => $d, 'p' => $p, 'q' => $q);
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return $keypair;
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}
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/**
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* Finds greatest common divider (GCD) of $num1 and $num2
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*
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* @param string $num1
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* @param string $num2
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* @return string
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* @access public
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*/
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public function GCD($num1, $num2)
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{
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do {
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$tmp = bcmod($num1, $num2);
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$num1 = $num2;
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$num2 = $tmp;
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} while (bccomp($num2, '0'));
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return $num1;
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}
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/**
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* Performs Miller-Rabin primality test for number $num
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* with base $base. Returns true, if $num is strong pseudoprime
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* by base $base. Else returns false.
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*
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* @param string $num
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* @param string $base
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* @return bool
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* @access private
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*/
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public function _millerTest($num, $base)
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{
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if (!bccomp($num, '1')) {
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// 1 is not prime ;)
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return false;
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}
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$tmp = bcsub($num, '1');
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$zero_bits = 0;
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while (!bccomp(bcmod($tmp, '2'), '0')) {
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$zero_bits++;
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$tmp = bcdiv($tmp, '2');
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}
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$tmp = $this->powmod($base, $tmp, $num);
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if (!bccomp($tmp, '1')) {
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// $num is probably prime
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return true;
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}
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while ($zero_bits--) {
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if (!bccomp(bcadd($tmp, '1'), $num)) {
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// $num is probably prime
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return true;
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}
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$tmp = $this->powmod($tmp, '2', $num);
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}
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// $num is composite
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return false;
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}
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/**
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* Transforms binary representation of large integer into its native form.
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*
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* Example of transformation:
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* $str = "\x12\x34\x56\x78\x90";
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* $num = 0x9078563412;
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*
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* @param string $str
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* @return string
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* @access public
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*/
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public function bin2int($str)
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{
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$result = '0';
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$n = strlen($str);
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do {
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$result = bcadd(bcmul($result, '256'), ord($str { --$n}));
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} while ($n > 0);
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return $result;
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}
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/**
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* Transforms large integer into binary representation.
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*
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* Example of transformation:
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* $num = 0x9078563412;
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* $str = "\x12\x34\x56\x78\x90";
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*
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* @param string $num
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* @return string
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* @access public
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*/
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public function int2bin($num)
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{
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$result = '';
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do {
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$result .= chr(bcmod($num, '256'));
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$num = bcdiv($num, '256');
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} while (bccomp($num, '0'));
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return $result;
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}
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/**
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* Calculates pow($num, $pow) (mod $mod)
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*
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* @param string $num
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* @param string $pow
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* @param string $mod
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* @return string
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* @access public
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*/
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public function powmod($num, $pow, $mod)
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{
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if (function_exists('bcpowmod')) {
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// bcpowmod is only available under PHP5
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return bcpowmod($num, $pow, $mod);
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}
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// emulate bcpowmod
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$result = '1';
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do {
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if (!bccomp(bcmod($pow, '2'), '1')) {
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$result = bcmod(bcmul($result, $num), $mod);
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}
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$num = bcmod(bcpow($num, '2'), $mod);
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$pow = bcdiv($pow, '2');
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} while (bccomp($pow, '0'));
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return $result;
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}
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/**
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* Calculates $num1 * $num2
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*
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* @param string $num1
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* @param string $num2
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* @return string
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* @access public
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*/
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public function mul($num1, $num2)
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{
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return bcmul($num1, $num2);
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}
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/**
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* Calculates $num1 % $num2
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*
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* @param string $num1
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* @param string $num2
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* @return string
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* @access public
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*/
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public function mod($num1, $num2)
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{
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return bcmod($num1, $num2);
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}
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/**
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* Compares abs($num1) to abs($num2).
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* Returns:
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* -1, if abs($num1) < abs($num2)
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* 0, if abs($num1) == abs($num2)
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* 1, if abs($num1) > abs($num2)
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*
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* @param string $num1
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* @param string $num2
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* @return int
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* @access public
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*/
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public function cmpAbs($num1, $num2)
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{
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return bccomp($num1, $num2);
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}
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/**
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* Tests $num on primality. Returns true, if $num is strong pseudoprime.
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* Else returns false.
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*
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* @param string $num
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* @return bool
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* @access private
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*/
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public function isPrime($num)
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{
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static $primes = null;
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static $primes_cnt = 0;
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if (is_null($primes)) {
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// generate all primes up to 10000
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$primes = array();
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for ($i = 0; $i < 10000; $i++) {
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$primes[] = $i;
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}
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$primes[0] = $primes[1] = 0;
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for ($i = 2; $i < 100; $i++) {
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while (!$primes[$i]) {
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$i++;
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}
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$j = $i;
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for ($j += $i; $j < 10000; $j += $i) {
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$primes[$j] = 0;
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}
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}
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$j = 0;
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for ($i = 0; $i < 10000; $i++) {
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if ($primes[$i]) {
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$primes[$j++] = $primes[$i];
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}
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}
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$primes_cnt = $j;
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}
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// try to divide number by small primes
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for ($i = 0; $i < $primes_cnt; $i++) {
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if (bccomp($num, $primes[$i]) <= 0) {
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// number is prime
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return true;
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}
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if (!bccomp(bcmod($num, $primes[$i]), '0')) {
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// number divides by $primes[$i]
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return false;
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}
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}
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/*
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try Miller-Rabin's probable-primality test for first
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7 primes as bases
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*/
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for ($i = 0; $i < 7; $i++) {
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if (!$this->_millerTest($num, $primes[$i])) {
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// $num is composite
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return false;
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}
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}
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// $num is strong pseudoprime
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return true;
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}
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/**
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* Produces a better random number
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* for seeding mt_rand()
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*
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* @access private
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*/
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public function _makeSeed()
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{
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return hexdec(sha1(sha1(microtime(true) * mt_rand()) . md5(microtime(true) * mt_rand())));
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}
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/**
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* Generates prime number with length $bits_cnt
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*
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* @param int $bits_cnt
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* @access public
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*/
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public function getPrime($bits_cnt)
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{
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$bytes_n = intval($bits_cnt / 8);
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$bits_n = $bits_cnt % 8;
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do {
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$str = '';
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mt_srand((int) $this->_makeSeed());
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for ($i = 0; $i < $bytes_n; $i++) {
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$str .= chr((int) sha1(mt_rand() * microtime(true)) & 0xff);
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}
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$n = mt_rand() * microtime(true) & 0xff;
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$n |= 0x80;
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$n >>= 8 - $bits_n;
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$str .= chr($n);
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$num = $this->bin2int($str);
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// search for the next closest prime number after [$num]
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if (!bccomp(bcmod($num, '2'), '0')) {
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$num = bcadd($num, '1');
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}
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while (!$this->isPrime($num)) {
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$num = bcadd($num, '2');
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}
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} while ($this->bitLen($num) != $bits_cnt);
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return $num;
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}
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/**
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* Calculates $num - 1
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*
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* @param string $num
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* @return string
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* @access public
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*/
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public function dec($num)
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{
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return bcsub($num, '1');
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}
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/**
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* Returns true, if $num is equal to one. Else returns false
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*
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* @param string $num
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* @return bool
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* @access public
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*/
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public function isOne($num)
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{
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return !bccomp($num, '1');
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}
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|
|
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/**
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* Finds inverse number $inv for $num by modulus $mod, such as:
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* $inv * $num = 1 (mod $mod)
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*
|
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* @param string $num
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* @param string $mod
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* @return string
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* @access public
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*/
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public function invmod($num, $mod)
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{
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$x = '1';
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$y = '0';
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$num1 = $mod;
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do {
|
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$tmp = bcmod($num, $num1);
|
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$q = bcdiv($num, $num1);
|
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$num = $num1;
|
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$num1 = $tmp;
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$tmp = bcsub($x, bcmul($y, $q));
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$x = $y;
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$y = $tmp;
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} while (bccomp($num1, '0'));
|
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if (bccomp($x, '0') < 0) {
|
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$x = bcadd($x, $mod);
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}
|
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return $x;
|
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}
|
|
|
|
/**
|
|
* Returns bit length of number $num
|
|
*
|
|
* @param string $num
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|
* @return int
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* @access public
|
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*/
|
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public function bitLen($num)
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{
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$tmp = $this->int2bin($num);
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$bit_len = strlen($tmp) * 8;
|
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$tmp = ord($tmp {strlen($tmp) - 1});
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if (!$tmp) {
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$bit_len -= 8;
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}
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else {
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while (!($tmp & 0x80)) {
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$bit_len--;
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$tmp <<= 1;
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}
|
|
}
|
|
return $bit_len;
|
|
}
|
|
|
|
/**
|
|
* Calculates bitwise or of $num1 and $num2,
|
|
* starting from bit $start_pos for number $num1
|
|
*
|
|
* @param string $num1
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|
* @param string $num2
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|
* @param int $start_pos
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* @return string
|
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* @access public
|
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*/
|
|
public function bitOr($num1, $num2, $start_pos)
|
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{
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$start_byte = intval($start_pos / 8);
|
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$start_bit = $start_pos % 8;
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$tmp1 = $this->int2bin($num1);
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|
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$num2 = bcmul($num2, 1 << $start_bit);
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$tmp2 = $this->int2bin($num2);
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if ($start_byte < strlen($tmp1)) {
|
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$tmp2 |= substr($tmp1, $start_byte);
|
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$tmp1 = substr($tmp1, 0, $start_byte) . $tmp2;
|
|
}
|
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else {
|
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$tmp1 = str_pad($tmp1, $start_byte, "\0") . $tmp2;
|
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}
|
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return $this->bin2int($tmp1);
|
|
}
|
|
|
|
/**
|
|
* Returns part of number $num, starting at bit
|
|
* position $start with length $length
|
|
*
|
|
* @param string $num
|
|
* @param int start
|
|
* @param int length
|
|
* @return string
|
|
* @access public
|
|
*/
|
|
public function subint($num, $start, $length)
|
|
{
|
|
$start_byte = intval($start / 8);
|
|
$start_bit = $start % 8;
|
|
$byte_length = intval($length / 8);
|
|
$bit_length = $length % 8;
|
|
if ($bit_length) {
|
|
$byte_length++;
|
|
}
|
|
$num = bcdiv($num, 1 << $start_bit);
|
|
$tmp = substr($this->int2bin($num), $start_byte, $byte_length);
|
|
$tmp = str_pad($tmp, $byte_length, "\0");
|
|
$tmp = substr_replace($tmp, $tmp {$byte_length - 1} & chr(0xff >> (8 - $bit_length)), $byte_length - 1, 1);
|
|
return $this->bin2int($tmp);
|
|
}
|
|
|
|
/**
|
|
* Converts a hex string to bigint string
|
|
*
|
|
* @param string $hex
|
|
* @return string
|
|
* @access public
|
|
*/
|
|
public function hex2bint($hex)
|
|
{
|
|
$result = '0';
|
|
for ($i = 0; $i < strlen($hex); $i++) {
|
|
$result = bcmul($result, '16');
|
|
if ($hex[$i] >= '0' && $hex[$i] <= '9') {
|
|
$result = bcadd($result, $hex[$i]);
|
|
}
|
|
else if ($hex[$i] >= 'a' && $hex[$i] <= 'f') {
|
|
$result = bcadd($result, '1' . ('0' + (ord($hex[$i]) - ord('a'))));
|
|
}
|
|
else if ($hex[$i] >= 'A' && $hex[$i] <= 'F') {
|
|
$result = bcadd($result, '1' . ('0' + (ord($hex[$i]) - ord('A'))));
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Converts a hex string to int
|
|
*
|
|
* @param string $hex
|
|
* @return int
|
|
* @access public
|
|
*/
|
|
public function hex2int($hex)
|
|
{
|
|
$result = 0;
|
|
for ($i = 0; $i < strlen($hex); $i++) {
|
|
$result *= 16;
|
|
if ($hex[$i] >= '0' && $hex[$i] <= '9') {
|
|
$result += ord($hex[$i]) - ord('0');
|
|
}
|
|
else if ($hex[$i] >= 'a' && $hex[$i] <= 'f') {
|
|
$result += 10 + (ord($hex[$i]) - ord('a'));
|
|
}
|
|
else if ($hex[$i] >= 'A' && $hex[$i] <= 'F') {
|
|
$result += 10 + (ord($hex[$i]) - ord('A'));
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Converts a bigint string to the ascii code
|
|
*
|
|
* @param string $bigint
|
|
* @return string
|
|
* @access public
|
|
*/
|
|
public function bint2char($bigint)
|
|
{
|
|
$message = '';
|
|
while (bccomp($bigint, '0') != 0) {
|
|
$ascii = bcmod($bigint, '256');
|
|
$bigint = bcdiv($bigint, '256', 0);
|
|
$message .= chr($ascii);
|
|
}
|
|
return $message;
|
|
}
|
|
|
|
/**
|
|
* Removes the redundacy in den encrypted string
|
|
*
|
|
* @param string $string
|
|
* @return mixed
|
|
* @access public
|
|
*/
|
|
public function redundacyCheck($string)
|
|
{
|
|
$r1 = substr($string, 0, 2);
|
|
$r2 = substr($string, 2);
|
|
$check = $this->hex2int($r1);
|
|
$value = $r2;
|
|
$sum = 0;
|
|
for ($i = 0; $i < strlen($value); $i++) {
|
|
$sum += ord($value[$i]);
|
|
}
|
|
if ($check == ($sum & 0xFF)) {
|
|
return $value;
|
|
}
|
|
else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Decrypts a given string with the $dec_key and the $enc_mod
|
|
*
|
|
* @param string $encrypted
|
|
* @param int $dec_key
|
|
* @param int $enc_mod
|
|
* @return string
|
|
* @access public
|
|
*/
|
|
public function decrypt($encrypted, $dec_key, $enc_mod)
|
|
{
|
|
//replaced split with explode
|
|
$blocks = explode(' ', $encrypted);
|
|
$result = "";
|
|
$max = count($blocks);
|
|
for ($i = 0; $i < $max; $i++) {
|
|
$dec = $this->hex2bint($blocks[$i]);
|
|
$dec = $this->powmod($dec, $dec_key, $enc_mod);
|
|
$ascii = $this->bint2char($dec);
|
|
$result .= $ascii;
|
|
}
|
|
return $this->redundacyCheck($result);
|
|
}
|
|
|
|
/**
|
|
* Converts a given decimal string to any base between 2 and 36
|
|
*
|
|
* @param string $decimal
|
|
* @param int $base
|
|
* @return string
|
|
*/
|
|
public function dec2string($decimal, $base)
|
|
{
|
|
|
|
$string = null;
|
|
|
|
$base = (int) $base;
|
|
if ($base < 2 | $base > 36 | $base == 10) {
|
|
echo 'BASE must be in the range 2-9 or 11-36';
|
|
exit;
|
|
}
|
|
|
|
$charset = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
|
|
|
|
$charset = substr($charset, 0, $base);
|
|
|
|
do {
|
|
$remainder = bcmod($decimal, $base);
|
|
$char = substr($charset, $remainder, 1);
|
|
$string = "$char$string";
|
|
$decimal = bcdiv(bcsub($decimal, $remainder), $base);
|
|
} while ($decimal > 0);
|
|
|
|
return strtolower($string);
|
|
}
|
|
|
|
public function getE()
|
|
{
|
|
return $this->_e;
|
|
}
|
|
|
|
public function generatePrime($length)
|
|
{
|
|
$this->_key_len = intval($length);
|
|
if ($this->_key_len < 8) {
|
|
$this->_key_len = 8;
|
|
}
|
|
|
|
$e = $this->bin2int("\x01\x00\x01");
|
|
|
|
$p_len = intval(($this->_key_len + 1) / 2);
|
|
do {
|
|
$p = $this->getPrime($p_len);
|
|
$p1 = $this->dec($p);
|
|
$tmp = $this->GCD($e, $p1);
|
|
} while (!$this->isOne($tmp));
|
|
|
|
return $p;
|
|
}
|
|
|
|
}
|