Merge branch 'split-file_simplecrypt.class.inc.php_SimpleCryptSimpleEngine.php' into split-file_simplecrypt.class.inc.php

sources/Application/SimpleCrypt/SimpleCryptSimpleEngine.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * Simple Engine doesn't need any PHP extension.
+ * Every encryption of the same string with the same key
+ * will return the same encrypted string
+ */
+class SimpleCryptSimpleEngine implements CryptEngine
+{
+    public static function GetNewDefaultParams()
+    {
+        return array('lib' => 'Simple', 'key' => null);
+    }
+
+    public function Encrypt($key, $sString)
+    {
+        $result = '';
+        for ($i = 1; $i <= strlen($sString); $i++) {
+            $char = substr($sString, $i - 1, 1);
+            $keychar = substr($key, ($i % strlen($key)) - 1, 1);
+            $char = chr(ord($char) + ord($keychar));
+            $result .= $char;
+        }
+        return $result;
+    }
+
+    public function Decrypt($key, $encrypted_data)
+    {
+        $result = '';
+        for ($i = 1; $i <= strlen($encrypted_data); $i++) {
+            $char = substr($encrypted_data, $i - 1, 1);
+            $keychar = substr($key, ($i % strlen($key)) - 1, 1);
+            $char = chr(ord($char) - ord($keychar));
+            $result .= $char;
+        }
+        return $result;
+    }
+}