diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Crypt/Math.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Crypt/Math.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,102 @@
+<?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: Math.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * @see Zend_Crypt_Math_BigInteger
+ */
+require_once 'Zend/Crypt/Math/BigInteger.php';
+
+/**
+ * @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 extends Zend_Crypt_Math_BigInteger
+{
+
+    /**
+     * Generate a pseudorandom number within the given range.
+     * Will attempt to read from a systems RNG if it exists or else utilises
+     * a simple random character to maximum length process. Simplicity
+     * is a factor better left for development...
+     *
+     * @param string|int $minimum
+     * @param string|int $maximum
+     * @return string
+     */
+    public function rand($minimum, $maximum)
+    {
+        if (file_exists('/dev/urandom')) {
+            $frandom = fopen('/dev/urandom', 'r');
+            if ($frandom !== false) {
+                return fread($frandom, strlen($maximum) - 1);
+            }
+        }
+        if (strlen($maximum) < 4) {
+            return mt_rand($minimum, $maximum - 1);
+        }
+        $rand = '';
+        $i2 = strlen($maximum) - 1;
+        for ($i = 1;$i < $i2;$i++) {
+            $rand .= mt_rand(0,9);
+        }
+        $rand .= mt_rand(0,9);
+        return $rand;
+    }
+
+    /**
+     * Get the big endian two's complement of a given big integer in
+     * binary notation
+     *
+     * @param string $long
+     * @return string
+     */
+    public function btwoc($long) {
+        if (ord($long[0]) > 127) {
+            return "\x00" . $long;
+        }
+        return $long;
+    }
+
+    /**
+     * Translate a binary form into a big integer string
+     *
+     * @param string $binary
+     * @return string
+     */
+    public function fromBinary($binary) {
+        return $this->_math->binaryToInteger($binary);
+    }
+
+    /**
+     * Translate a big integer string into a binary form
+     *
+     * @param string $integer
+     * @return string
+     */
+    public function toBinary($integer)
+    {
+        return $this->_math->integerToBinary($integer);
+    }
+
+}