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-rw-r--r--plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php313
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diff --git a/plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php b/plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php
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-<?php
-/**
- * Crypt_RSA allows to do following operations:
- * - key pair generation
- * - encryption and decryption
- * - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt. If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category Encryption
- * @package Crypt_RSA
- * @author Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005, 2006 Alexander Valyalkin
- * @license http://www.php.net/license/3_0.txt PHP License 3.0
- * @version 1.2.0b
- * @link http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * Crypt_RSA_Math_BigInt class.
- *
- * Provides set of math functions, which are used by Crypt_RSA package
- * This class is a wrapper for big_int PECL extension,
- * which could be loaded from http://pecl.php.net/packages/big_int
- *
- * @category Encryption
- * @package Crypt_RSA
- * @author Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005, 2006 Alexander Valyalkin
- * @license http://www.php.net/license/3_0.txt PHP License 3.0
- * @link http://pear.php.net/package/Crypt_RSA
- * @version @package_version@
- * @access public
- */
-class Crypt_RSA_Math_BigInt
-{
- /**
- * error description
- *
- * @var string
- * @access public
- */
- var $errstr = '';
-
- /**
- * Crypt_RSA_Math_BigInt constructor.
- * Checks an existance of big_int PECL math package.
- * This package is available at http://pecl.php.net/packages/big_int
- * On failure saves error description in $this->errstr
- *
- * @access public
- */
- function Crypt_RSA_Math_BigInt()
- {
- if (!extension_loaded('big_int')) {
- if (!@dl('big_int.' . PHP_SHLIB_SUFFIX) && !@dl('php_big_int.' . PHP_SHLIB_SUFFIX)) {
- // cannot load big_int extension
- $this->errstr = 'Crypt_RSA package requires big_int PECL package. ' .
- 'It is available at http://pecl.php.net/packages/big_int';
- return;
- }
- }
-
- // check version of big_int extension ( Crypt_RSA requires version 1.0.2 and higher )
- if (!in_array('bi_info', get_extension_funcs('big_int'))) {
- // there is no bi_info() function in versions, older than 1.0.2
- $this->errstr = 'Crypt_RSA package requires big_int package version 1.0.2 and higher';
- }
- }
-
- /**
- * Transforms binary representation of large integer into its native form.
- *
- * Example of transformation:
- * $str = "\x12\x34\x56\x78\x90";
- * $num = 0x9078563412;
- *
- * @param string $str
- * @return big_int resource
- * @access public
- */
- function bin2int($str)
- {
- return bi_unserialize($str);
- }
-
- /**
- * Transforms large integer into binary representation.
- *
- * Example of transformation:
- * $num = 0x9078563412;
- * $str = "\x12\x34\x56\x78\x90";
- *
- * @param big_int resource $num
- * @return string
- * @access public
- */
- function int2bin($num)
- {
- return bi_serialize($num);
- }
-
- /**
- * Calculates pow($num, $pow) (mod $mod)
- *
- * @param big_int resource $num
- * @param big_int resource $pow
- * @param big_int resource $mod
- * @return big_int resource
- * @access public
- */
- function powmod($num, $pow, $mod)
- {
- return bi_powmod($num, $pow, $mod);
- }
-
- /**
- * Calculates $num1 * $num2
- *
- * @param big_int resource $num1
- * @param big_int resource $num2
- * @return big_int resource
- * @access public
- */
- function mul($num1, $num2)
- {
- return bi_mul($num1, $num2);
- }
-
- /**
- * Calculates $num1 % $num2
- *
- * @param string $num1
- * @param string $num2
- * @return string
- * @access public
- */
- function mod($num1, $num2)
- {
- return bi_mod($num1, $num2);
- }
-
- /**
- * Compares abs($num1) to abs($num2).
- * Returns:
- * -1, if abs($num1) < abs($num2)
- * 0, if abs($num1) == abs($num2)
- * 1, if abs($num1) > abs($num2)
- *
- * @param big_int resource $num1
- * @param big_int resource $num2
- * @return int
- * @access public
- */
- function cmpAbs($num1, $num2)
- {
- return bi_cmp_abs($num1, $num2);
- }
-
- /**
- * Tests $num on primality. Returns true, if $num is strong pseudoprime.
- * Else returns false.
- *
- * @param string $num
- * @return bool
- * @access private
- */
- function isPrime($num)
- {
- return bi_is_prime($num) ? true : false;
- }
-
- /**
- * Generates prime number with length $bits_cnt
- * using $random_generator as random generator function.
- *
- * @param int $bits_cnt
- * @param string $rnd_generator
- * @access public
- */
- function getPrime($bits_cnt, $random_generator)
- {
- $bytes_n = intval($bits_cnt / 8);
- $bits_n = $bits_cnt % 8;
- do {
- $str = '';
- for ($i = 0; $i < $bytes_n; $i++) {
- $str .= chr(call_user_func($random_generator) & 0xff);
- }
- $n = call_user_func($random_generator) & 0xff;
- $n |= 0x80;
- $n >>= 8 - $bits_n;
- $str .= chr($n);
- $num = $this->bin2int($str);
-
- // search for the next closest prime number after [$num]
- $num = bi_next_prime($num);
- } while ($this->bitLen($num) != $bits_cnt);
- return $num;
- }
-
- /**
- * Calculates $num - 1
- *
- * @param big_int resource $num
- * @return big_int resource
- * @access public
- */
- function dec($num)
- {
- return bi_dec($num);
- }
-
- /**
- * Returns true, if $num is equal to 1. Else returns false
- *
- * @param big_int resource $num
- * @return bool
- * @access public
- */
- function isOne($num)
- {
- return bi_is_one($num);
- }
-
- /**
- * Finds greatest common divider (GCD) of $num1 and $num2
- *
- * @param big_int resource $num1
- * @param big_int resource $num2
- * @return big_int resource
- * @access public
- */
- function GCD($num1, $num2)
- {
- return bi_gcd($num1, $num2);
- }
-
- /**
- * Finds inverse number $inv for $num by modulus $mod, such as:
- * $inv * $num = 1 (mod $mod)
- *
- * @param big_int resource $num
- * @param big_int resource $mod
- * @return big_int resource
- * @access public
- */
- function invmod($num, $mod)
- {
- return bi_invmod($num, $mod);
- }
-
- /**
- * Returns bit length of number $num
- *
- * @param big_int resource $num
- * @return int
- * @access public
- */
- function bitLen($num)
- {
- return bi_bit_len($num);
- }
-
- /**
- * Calculates bitwise or of $num1 and $num2,
- * starting from bit $start_pos for number $num1
- *
- * @param big_int resource $num1
- * @param big_int resource $num2
- * @param int $start_pos
- * @return big_int resource
- * @access public
- */
- function bitOr($num1, $num2, $start_pos)
- {
- return bi_or($num1, $num2, $start_pos);
- }
-
- /**
- * Returns part of number $num, starting at bit
- * position $start with length $length
- *
- * @param big_int resource $num
- * @param int start
- * @param int length
- * @return big_int resource
- * @access public
- */
- function subint($num, $start, $length)
- {
- return bi_subint($num, $start, $length);
- }
-
- /**
- * Returns name of current wrapper
- *
- * @return string name of current wrapper
- * @access public
- */
- function getWrapperName()
- {
- return 'BigInt';
- }
-}
-
-?> \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 13:05:55 +0000