add methods to decrypt return data from router

[GitHub/Stricted/speedport-hybrid-php-api.git] / CryptLib / Encryption / PackingMode / ISO10126.php

diff --git a/CryptLib/Encryption/PackingMode/ISO10126.php b/CryptLib/Encryption/PackingMode/ISO10126.php
new file mode 100644 (file)
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+++ b/CryptLib/Encryption/PackingMode/ISO10126.php
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+<?php
+/**
+ * A Packing Mode implementation of the ISO 10126 standard
+ *
+ * PHP version 5.3
+ * 
+ * @category   PHPCryptLib
+ * @package    Encryption
+ * @subpackage PackingMode
+ * @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\Encryption\PackingMode;
+
+/**
+ * A Packing Mode implementation of the ISO 10126 standard
+ *
+ * @category   PHPCryptLib
+ * @package    Encryption
+ * @subpackage PackingMode
+ * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
+ */
+class ISO10126 implements \CryptLib\Encryption\PackingMode {
+
+    /**
+     * Pad the string to the specified size
+     *
+     * @param string $string    The string to pad
+     * @param int    $blockSize The size to pad to
+     *
+     * @return string The padded string
+     */
+    public function pad($string, $blockSize = 32) {
+        $pad    = $blockSize - (strlen($string) % $blockSize);
+        $padstr = '';
+        for ($i = 1; $i < $pad; $i++) {
+            $padstr .= chr(mt_rand(0, 255));
+        }
+        return $string . $padstr . chr($pad);
+    }
+
+    /**
+     * Strip the padding from the supplied string
+     *
+     * @param string $string The string to trim
+     *
+     * @return string The unpadded string
+     */
+    public function strip($string) {
+        $end = ord(substr($string, -1));
+        $len = strlen($string) - $end;
+        return substr($string, 0, $len);
+    }
+
+}