--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Crypt/Math/BigInteger/Bcmath.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,203 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Crypt
+ * @subpackage Math
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Bcmath.php 22653 2010-07-22 18:41:39Z mabe $
+ */
+
+/**
+ * @see Zend_Crypt_Math_BigInteger_Interface
+ */
+require_once 'Zend/Crypt/Math/BigInteger/Interface.php';
+
+/**
+ * Support for arbitrary precision mathematics in PHP.
+ *
+ * Zend_Crypt_Math_BigInteger_Bcmath is a wrapper across the PHP BCMath
+ * extension.
+ *
+ * @category   Zend
+ * @package    Zend_Crypt
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Crypt_Math_BigInteger_Bcmath implements Zend_Crypt_Math_BigInteger_Interface
+{
+
+    /**
+     * Initialise a big integer into an extension specific type. This is not
+     * applicable to BCMath.
+     * @param string $operand
+     * @param int $base
+     * @return string
+     */
+    public function init($operand, $base = 10)
+    {
+        return $operand;
+    }
+
+    /**
+     * Adds two arbitrary precision numbers
+     *
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function add($left_operand, $right_operand)
+    {
+        return bcadd($left_operand, $right_operand);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function subtract($left_operand, $right_operand)
+    {
+        return bcsub($left_operand, $right_operand);
+    }
+
+    /**
+     * Compare two big integers and returns result as an integer where 0 means
+     * both are identical, 1 that left_operand is larger, or -1 that
+     * right_operand is larger.
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return int
+     */
+    public function compare($left_operand, $right_operand)
+    {
+        return bccomp($left_operand, $right_operand);
+    }
+
+    /**
+     * Divide two big integers and return result or NULL if the denominator
+     * is zero.
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string|null
+     */
+    public function divide($left_operand, $right_operand)
+    {
+        return bcdiv($left_operand, $right_operand);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function modulus($left_operand, $modulus)
+    {
+        return bcmod($left_operand, $modulus);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function multiply($left_operand, $right_operand)
+    {
+        return bcmul($left_operand, $right_operand);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function pow($left_operand, $right_operand)
+    {
+        return bcpow($left_operand, $right_operand);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function powmod($left_operand, $right_operand, $modulus)
+    {
+        return bcpowmod($left_operand, $right_operand, $modulus);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function sqrt($operand)
+    {
+        return bcsqrt($operand);
+    }
+
+
+    public function binaryToInteger($operand)
+    {
+        $result = '0';
+        while (strlen($operand)) {
+            $ord = ord(substr($operand, 0, 1));
+            $result = bcadd(bcmul($result, 256), $ord);
+            $operand = substr($operand, 1);
+        }
+        return $result;
+    }
+
+
+    public function integerToBinary($operand)
+    {
+        $cmp = bccomp($operand, 0);
+        $return = '';
+        if ($cmp == 0) {
+            return "\0";
+        }
+        while (bccomp($operand, 0) > 0) {
+            $return = chr(bcmod($operand, 256)) . $return;
+            $operand = bcdiv($operand, 256);
+        }
+        if (ord($return[0]) > 127) {
+            $return = "\0" . $return;
+        }
+        return $return;
+    }
+
+    /**public function integerToBinary($operand)
+    {
+        $return = '';
+        while(bccomp($operand, '0')) {
+            $return .= chr(bcmod($operand, '256'));
+            $operand = bcdiv($operand, '256');
+        }
+        return $return;
+    }**/ // Prior version for referenced offset
+
+
+    public function hexToDecimal($operand)
+    {
+        $return = '0';
+        while(strlen($hex)) {
+            $hex = hexdec(substr($operand, 0, 4));
+            $dec = bcadd(bcmul($return, 65536), $hex);
+            $operand = substr($operand, 4);
+        }
+        return $return;
+    }
+
+}
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