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

sources/Application/SimpleCrypt/SimpleCryptMcryptEngine.php

@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * McryptEngine requires Mcrypt extension
+ * Every encryption of the same string with the same key
+ * will return a different encrypted string.
+ */
+class SimpleCryptMcryptEngine implements CryptEngine
+{
+    var $alg = MCRYPT_BLOWFISH;
+    var $td = null;
+
+    public static function GetNewDefaultParams()
+    {
+        return array('lib' => 'Mcrypt', 'key' => null);
+    }
+
+
+    public function __construct()
+    {
+        $this->td = mcrypt_module_open($this->alg, '', 'cbc', '');
+    }
+
+    public function Encrypt($key, $sString)
+    {
+        $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($this->td), MCRYPT_DEV_URANDOM); // MCRYPT_DEV_URANDOM is now useable since itop requires php >= 5.6
+        if (false === $iv) {
+            throw new Exception('IV generation failed');
+        }
+        mcrypt_generic_init($this->td, $key, $iv);
+        if (empty($sString)) {
+            $sString = str_repeat("\0", 8);
+        }
+        $encrypted_data = mcrypt_generic($this->td, $sString);
+        mcrypt_generic_deinit($this->td);
+        return $iv . $encrypted_data;
+    }
+
+    public function Decrypt($key, $encrypted_data)
+    {
+        $iv = substr($encrypted_data, 0, mcrypt_enc_get_iv_size($this->td));
+        $string = substr($encrypted_data, mcrypt_enc_get_iv_size($this->td));
+        $r = mcrypt_generic_init($this->td, $key, $iv);
+        if (($r < 0) || ($r === false)) {
+            $decrypted_data = Dict::S("Core:AttributeEncryptFailedToDecrypt");
+        } else {
+            $decrypted_data = rtrim(mdecrypt_generic($this->td, $string), "\0");
+            mcrypt_generic_deinit($this->td);
+        }
+        return $decrypted_data;
+    }
+
+    public function __destruct()
+    {
+        mcrypt_module_close($this->td);
+    }
+}