aboutsummaryrefslogtreecommitdiff
path: root/models/Auth.old/OpenID/BigMath.php
diff options
context:
space:
mode:
Diffstat (limited to 'models/Auth.old/OpenID/BigMath.php')
-rw-r--r--models/Auth.old/OpenID/BigMath.php471
1 files changed, 0 insertions, 471 deletions
diff --git a/models/Auth.old/OpenID/BigMath.php b/models/Auth.old/OpenID/BigMath.php
deleted file mode 100644
index d99414e02..000000000
--- a/models/Auth.old/OpenID/BigMath.php
+++ /dev/null
@@ -1,471 +0,0 @@
-<?php
-
-/**
- * BigMath: A math library wrapper that abstracts out the underlying
- * long integer library.
- *
- * PHP versions 4 and 5
- *
- * LICENSE: See the COPYING file included in this distribution.
- *
- * @access private
- * @package OpenID
- * @author JanRain, Inc. <openid@janrain.com>
- * @copyright 2005 Janrain, Inc.
- * @license http://www.gnu.org/copyleft/lesser.html LGPL
- */
-
-/**
- * Needed for random number generation
- */
-require_once 'Auth/OpenID/CryptUtil.php';
-
-/**
- * Need Auth_OpenID::bytes().
- */
-require_once 'Auth/OpenID.php';
-
-/**
- * The superclass of all big-integer math implementations
- * @access private
- * @package OpenID
- */
-class Auth_OpenID_MathLibrary {
- /**
- * Given a long integer, returns the number converted to a binary
- * string. This function accepts long integer values of arbitrary
- * magnitude and uses the local large-number math library when
- * available.
- *
- * @param integer $long The long number (can be a normal PHP
- * integer or a number created by one of the available long number
- * libraries)
- * @return string $binary The binary version of $long
- */
- function longToBinary($long)
- {
- $cmp = $this->cmp($long, 0);
- if ($cmp < 0) {
- $msg = __FUNCTION__ . " takes only positive integers.";
- trigger_error($msg, E_USER_ERROR);
- return null;
- }
-
- if ($cmp == 0) {
- return "\x00";
- }
-
- $bytes = array();
-
- while ($this->cmp($long, 0) > 0) {
- array_unshift($bytes, $this->mod($long, 256));
- $long = $this->div($long, pow(2, 8));
- }
-
- if ($bytes && ($bytes[0] > 127)) {
- array_unshift($bytes, 0);
- }
-
- $string = '';
- foreach ($bytes as $byte) {
- $string .= pack('C', $byte);
- }
-
- return $string;
- }
-
- /**
- * Given a binary string, returns the binary string converted to a
- * long number.
- *
- * @param string $binary The binary version of a long number,
- * probably as a result of calling longToBinary
- * @return integer $long The long number equivalent of the binary
- * string $str
- */
- function binaryToLong($str)
- {
- if ($str === null) {
- return null;
- }
-
- // Use array_merge to return a zero-indexed array instead of a
- // one-indexed array.
- $bytes = array_merge(unpack('C*', $str));
-
- $n = $this->init(0);
-
- if ($bytes && ($bytes[0] > 127)) {
- trigger_error("bytesToNum works only for positive integers.",
- E_USER_WARNING);
- return null;
- }
-
- foreach ($bytes as $byte) {
- $n = $this->mul($n, pow(2, 8));
- $n = $this->add($n, $byte);
- }
-
- return $n;
- }
-
- function base64ToLong($str)
- {
- $b64 = base64_decode($str);
-
- if ($b64 === false) {
- return false;
- }
-
- return $this->binaryToLong($b64);
- }
-
- function longToBase64($str)
- {
- return base64_encode($this->longToBinary($str));
- }
-
- /**
- * Returns a random number in the specified range. This function
- * accepts $start, $stop, and $step values of arbitrary magnitude
- * and will utilize the local large-number math library when
- * available.
- *
- * @param integer $start The start of the range, or the minimum
- * random number to return
- * @param integer $stop The end of the range, or the maximum
- * random number to return
- * @param integer $step The step size, such that $result - ($step
- * * N) = $start for some N
- * @return integer $result The resulting randomly-generated number
- */
- function rand($stop)
- {
- static $duplicate_cache = array();
-
- // Used as the key for the duplicate cache
- $rbytes = $this->longToBinary($stop);
-
- if (array_key_exists($rbytes, $duplicate_cache)) {
- list($duplicate, $nbytes) = $duplicate_cache[$rbytes];
- } else {
- if ($rbytes[0] == "\x00") {
- $nbytes = Auth_OpenID::bytes($rbytes) - 1;
- } else {
- $nbytes = Auth_OpenID::bytes($rbytes);
- }
-
- $mxrand = $this->pow(256, $nbytes);
-
- // If we get a number less than this, then it is in the
- // duplicated range.
- $duplicate = $this->mod($mxrand, $stop);
-
- if (count($duplicate_cache) > 10) {
- $duplicate_cache = array();
- }
-
- $duplicate_cache[$rbytes] = array($duplicate, $nbytes);
- }
-
- do {
- $bytes = "\x00" . Auth_OpenID_CryptUtil::getBytes($nbytes);
- $n = $this->binaryToLong($bytes);
- // Keep looping if this value is in the low duplicated range
- } while ($this->cmp($n, $duplicate) < 0);
-
- return $this->mod($n, $stop);
- }
-}
-
-/**
- * Exposes BCmath math library functionality.
- *
- * {@link Auth_OpenID_BcMathWrapper} wraps the functionality provided
- * by the BCMath extension.
- *
- * @access private
- * @package OpenID
- */
-class Auth_OpenID_BcMathWrapper extends Auth_OpenID_MathLibrary{
- var $type = 'bcmath';
-
- function add($x, $y)
- {
- return bcadd($x, $y);
- }
-
- function sub($x, $y)
- {
- return bcsub($x, $y);
- }
-
- function pow($base, $exponent)
- {
- return bcpow($base, $exponent);
- }
-
- function cmp($x, $y)
- {
- return bccomp($x, $y);
- }
-
- function init($number, $base = 10)
- {
- return $number;
- }
-
- function mod($base, $modulus)
- {
- return bcmod($base, $modulus);
- }
-
- function mul($x, $y)
- {
- return bcmul($x, $y);
- }
-
- function div($x, $y)
- {
- return bcdiv($x, $y);
- }
-
- /**
- * Same as bcpowmod when bcpowmod is missing
- *
- * @access private
- */
- function _powmod($base, $exponent, $modulus)
- {
- $square = $this->mod($base, $modulus);
- $result = 1;
- while($this->cmp($exponent, 0) > 0) {
- if ($this->mod($exponent, 2)) {
- $result = $this->mod($this->mul($result, $square), $modulus);
- }
- $square = $this->mod($this->mul($square, $square), $modulus);
- $exponent = $this->div($exponent, 2);
- }
- return $result;
- }
-
- function powmod($base, $exponent, $modulus)
- {
- if (function_exists('bcpowmod')) {
- return bcpowmod($base, $exponent, $modulus);
- } else {
- return $this->_powmod($base, $exponent, $modulus);
- }
- }
-
- function toString($num)
- {
- return $num;
- }
-}
-
-/**
- * Exposes GMP math library functionality.
- *
- * {@link Auth_OpenID_GmpMathWrapper} wraps the functionality provided
- * by the GMP extension.
- *
- * @access private
- * @package OpenID
- */
-class Auth_OpenID_GmpMathWrapper extends Auth_OpenID_MathLibrary{
- var $type = 'gmp';
-
- function add($x, $y)
- {
- return gmp_add($x, $y);
- }
-
- function sub($x, $y)
- {
- return gmp_sub($x, $y);
- }
-
- function pow($base, $exponent)
- {
- return gmp_pow($base, $exponent);
- }
-
- function cmp($x, $y)
- {
- return gmp_cmp($x, $y);
- }
-
- function init($number, $base = 10)
- {
- return gmp_init($number, $base);
- }
-
- function mod($base, $modulus)
- {
- return gmp_mod($base, $modulus);
- }
-
- function mul($x, $y)
- {
- return gmp_mul($x, $y);
- }
-
- function div($x, $y)
- {
- return gmp_div_q($x, $y);
- }
-
- function powmod($base, $exponent, $modulus)
- {
- return gmp_powm($base, $exponent, $modulus);
- }
-
- function toString($num)
- {
- return gmp_strval($num);
- }
-}
-
-/**
- * Define the supported extensions. An extension array has keys
- * 'modules', 'extension', and 'class'. 'modules' is an array of PHP
- * module names which the loading code will attempt to load. These
- * values will be suffixed with a library file extension (e.g. ".so").
- * 'extension' is the name of a PHP extension which will be tested
- * before 'modules' are loaded. 'class' is the string name of a
- * {@link Auth_OpenID_MathWrapper} subclass which should be
- * instantiated if a given extension is present.
- *
- * You can define new math library implementations and add them to
- * this array.
- */
-function Auth_OpenID_math_extensions()
-{
- $result = array();
-
- if (!defined('Auth_OpenID_BUGGY_GMP')) {
- $result[] =
- array('modules' => array('gmp', 'php_gmp'),
- 'extension' => 'gmp',
- 'class' => 'Auth_OpenID_GmpMathWrapper');
- }
-
- $result[] = array(
- 'modules' => array('bcmath', 'php_bcmath'),
- 'extension' => 'bcmath',
- 'class' => 'Auth_OpenID_BcMathWrapper');
-
- return $result;
-}
-
-/**
- * Detect which (if any) math library is available
- */
-function Auth_OpenID_detectMathLibrary($exts)
-{
- $loaded = false;
-
- foreach ($exts as $extension) {
- // See if the extension specified is already loaded.
- if ($extension['extension'] &&
- extension_loaded($extension['extension'])) {
- $loaded = true;
- }
-
- // Try to load dynamic modules.
- if (!$loaded) {
- foreach ($extension['modules'] as $module) {
- if (dl($module . "." . PHP_SHLIB_SUFFIX)) {
- $loaded = true;
- break;
- }
- }
- }
-
- // If the load succeeded, supply an instance of
- // Auth_OpenID_MathWrapper which wraps the specified
- // module's functionality.
- if ($loaded) {
- return $extension;
- }
- }
-
- return false;
-}
-
-/**
- * {@link Auth_OpenID_getMathLib} checks for the presence of long
- * number extension modules and returns an instance of
- * {@link Auth_OpenID_MathWrapper} which exposes the module's
- * functionality.
- *
- * Checks for the existence of an extension module described by the
- * result of {@link Auth_OpenID_math_extensions()} and returns an
- * instance of a wrapper for that extension module. If no extension
- * module is found, an instance of {@link Auth_OpenID_MathWrapper} is
- * returned, which wraps the native PHP integer implementation. The
- * proper calling convention for this method is $lib =&
- * Auth_OpenID_getMathLib().
- *
- * This function checks for the existence of specific long number
- * implementations in the following order: GMP followed by BCmath.
- *
- * @return Auth_OpenID_MathWrapper $instance An instance of
- * {@link Auth_OpenID_MathWrapper} or one of its subclasses
- *
- * @package OpenID
- */
-function &Auth_OpenID_getMathLib()
-{
- // The instance of Auth_OpenID_MathWrapper that we choose to
- // supply will be stored here, so that subseqent calls to this
- // method will return a reference to the same object.
- static $lib = null;
-
- if (isset($lib)) {
- return $lib;
- }
-
- if (Auth_OpenID_noMathSupport()) {
- $null = null;
- return $null;
- }
-
- // If this method has not been called before, look at
- // Auth_OpenID_math_extensions and try to find an extension that
- // works.
- $ext = Auth_OpenID_detectMathLibrary(Auth_OpenID_math_extensions());
- if ($ext === false) {
- $tried = array();
- foreach (Auth_OpenID_math_extensions() as $extinfo) {
- $tried[] = $extinfo['extension'];
- }
- $triedstr = implode(", ", $tried);
-
- Auth_OpenID_setNoMathSupport();
-
- $result = null;
- return $result;
- }
-
- // Instantiate a new wrapper
- $class = $ext['class'];
- $lib = new $class();
-
- return $lib;
-}
-
-function Auth_OpenID_setNoMathSupport()
-{
- if (!defined('Auth_OpenID_NO_MATH_SUPPORT')) {
- define('Auth_OpenID_NO_MATH_SUPPORT', true);
- }
-}
-
-function Auth_OpenID_noMathSupport()
-{
- return defined('Auth_OpenID_NO_MATH_SUPPORT');
-}
-
-?>
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-06 08:52:14 +0000