add methods to decrypt return data from router

[GitHub/Stricted/speedport-hybrid-php-api.git] / CryptLib / Random / Source / Rand.php

diff --git a/CryptLib/Random/Source/Rand.php b/CryptLib/Random/Source/Rand.php
new file mode 100644 (file)
index 0000000..20e2c61
--- /dev/null
+++ b/CryptLib/Random/Source/Rand.php
@@ -0,0 +1,68 @@
+<?php
+/**
+ * The Rand Random Number Source
+ *
+ * This source generates low strength random numbers by using the internal
+ * rand() function.  By itself it is quite weak.  However when combined with
+ * other sources it does provide significant benefit.
+ *
+ * PHP version 5.3
+ *
+ * @category   PHPCryptLib
+ * @package    Random
+ * @subpackage Source
+ * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
+ * @copyright  2011 The Authors
+ * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
+ * @version    Build @@version@@
+ */
+
+namespace CryptLib\Random\Source;
+
+use CryptLib\Core\Strength;
+
+/**
+ * The Rand Random Number Source
+ *
+ * This source generates low strength random numbers by using the internal
+ * rand() function.  By itself it is quite weak.  However when combined with
+ * other sources it does provide significant benefit.
+ *
+ * @category   PHPCryptLib
+ * @package    Random
+ * @subpackage Source
+ * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
+ * @codeCoverageIgnore
+ */
+class Rand implements \CryptLib\Random\Source {
+
+    /**
+     * Return an instance of Strength indicating the strength of the source
+     *
+     * @return Strength An instance of one of the strength classes
+     */
+    public static function getStrength() {
+        // Detect if Suhosin Hardened PHP patch is applied
+        if (defined('S_ALL')) {
+            return new Strength(Strength::LOW);
+        } else {
+            return new Strength(Strength::VERYLOW);
+        }
+    }
+
+    /**
+     * Generate a random string of the specified size
+     *
+     * @param int $size The size of the requested random string
+     *
+     * @return string A string of the requested size
+     */
+    public function generate($size) {
+        $result = '';
+        for ($i = 0; $i < $size; $i++) {
+            $result .= chr((rand() ^ rand()) % 256);
+        }
+        return $result;
+    }
+
+}