diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Crypt/Math/BigInteger/Gmp.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Crypt/Math/BigInteger/Gmp.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,196 @@
+<?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: Gmp.php 23439 2010-11-23 21:10:14Z alexander $
+ */
+
+/**
+ * @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_Gmp 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_Gmp implements Zend_Crypt_Math_BigInteger_Interface
+{
+
+    /**
+     * Initialise a big integer into an extension specific type.
+     * @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)
+    {
+        $result = gmp_add($left_operand, $right_operand);
+        return gmp_strval($result);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function subtract($left_operand, $right_operand)
+    {
+        $result = gmp_sub($left_operand, $right_operand);
+        return gmp_strval($result);
+    }
+
+    /**
+     * 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)
+    {
+        $result = gmp_cmp($left_operand, $right_operand);
+        return gmp_strval($result);
+    }
+
+    /**
+     * 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)
+    {
+        $result = gmp_div($left_operand, $right_operand);
+        return gmp_strval($result);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function modulus($left_operand, $modulus)
+    {
+        $result = gmp_mod($left_operand, $modulus);
+        return gmp_strval($result);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function multiply($left_operand, $right_operand)
+    {
+        $result = gmp_mul($left_operand, $right_operand);
+        return gmp_strval($result);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function pow($left_operand, $right_operand)
+    {
+        $result = gmp_pow($left_operand, $right_operand);
+        return gmp_strval($result);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function powmod($left_operand, $right_operand, $modulus)
+    {
+        $result = gmp_powm($left_operand, $right_operand, $modulus);
+        return gmp_strval($result);
+    }
+
+    /**
+     * @param string $left_operand
+     * @param string $right_operand
+     * @return string
+     */
+    public function sqrt($operand)
+    {
+        $result = gmp_sqrt($operand);
+        return gmp_strval($result);
+    }
+
+
+    public function binaryToInteger($operand)
+    {
+        $result = '0';
+        while (strlen($operand)) {
+            $ord = ord(substr($operand, 0, 1));
+            $result = gmp_add(gmp_mul($result, 256), $ord);
+            $operand = substr($operand, 1);
+        }
+        return gmp_strval($result);
+    }
+
+
+    public function integerToBinary($operand)
+    {
+        $bigInt = gmp_strval($operand, 16);
+        if (strlen($bigInt) % 2 != 0) {
+            $bigInt = '0' . $bigInt;
+        } else if ($bigInt[0] > '7') {
+            $bigInt = '00' . $bigInt;
+        }
+        $return = pack("H*", $bigInt);
+        return $return;
+    }
+
+
+    public function hexToDecimal($operand)
+    {
+        $return = '0';
+        while(strlen($hex)) {
+            $hex = hexdec(substr($operand, 0, 4));
+            $dec = gmp_add(gmp_mul($return, 65536), $hex);
+            $operand = substr($operand, 4);
+        }
+        return $return;
+    }
+
+}
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