From cb09e369fb1ed41b5724a45929a49b42c2718203 Mon Sep 17 00:00:00 2001
From: Amaury Pouly <amaury.pouly@gmail.com>
Date: Sat, 3 Nov 2012 02:16:01 +0100
Subject: Introduce upgtools for sony nwz players

This tool can unpack UPG archives for firmware updates.

Change-Id: I32f5f1a84759198c7af4a4ecfd7aa65eaeda567a
---
 utils/nwztools/upgtools/mg.cpp | 67 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 utils/nwztools/upgtools/mg.cpp

(limited to 'utils/nwztools/upgtools/mg.cpp')

diff --git a/utils/nwztools/upgtools/mg.cpp b/utils/nwztools/upgtools/mg.cpp
new file mode 100644
index 0000000..8816259
--- /dev/null
+++ b/utils/nwztools/upgtools/mg.cpp
@@ -0,0 +1,67 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2012 Amaury Pouly
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "mg.h"
+#include <crypto++/cryptlib.h>
+#include <crypto++/modes.h>
+#include <crypto++/des.h>
+#include <crypto++/aes.h>
+#include <stdio.h>
+
+using namespace CryptoPP;
+namespace
+{
+    ECB_Mode< DES >::Decryption g_dec;
+    ECB_Mode< DES >::Encryption g_enc;
+
+    inline int dec_des_ecb(void *in, int size, void *out, uint8_t *key)
+    {
+        g_dec.SetKey(key, 8);
+        g_dec.ProcessData((byte*)out, (byte*)in, size);
+        return 0;
+    }
+
+    inline int enc_des_ecb(void *in, int size, void *out, uint8_t *key)
+    {
+        g_enc.SetKey(key, 8);
+        g_enc.ProcessData((byte*)out, (byte*)in, size);
+        return 0;
+    }
+}
+
+int mg_decrypt_fw(void *in, int size, void *out, uint8_t *key)
+{
+    return dec_des_ecb(in, size, out, key);
+}
+
+int mg_encrypt_fw(void *in, int size, void *out, uint8_t *key)
+{
+    return enc_des_ecb(in, size, out, key);
+}
+
+int mg_decrypt_pass(void *in, int size, void *out, uint8_t *key)
+{
+    return dec_des_ecb(in, size, out, key);
+}
+
+int mg_encrypt_pass(void *in, int size, void *out, uint8_t *key)
+{
+    return enc_des_ecb(in, size, out, key);
+}
-- 
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