Introduce rbutil/mkzenboot, a replacement for tools/mkzenboot

The old tools/mkzenboot has a number of problems: very hard to maintain,
poor integration with rbutil. Restart from scratch by recycling all the
crypto and descrambling code, rewrite the actual firmware modification part
to handle all scenarios in a much clearer way. The code is ready to be
integrated into Rockbox Utility, by using the very similar interface to
mkimxboot.
I copied all the keys from the old mkzenboot, so it can potentially support
the older Creative ports, but since this is untested, I prefer not do so
at the moment. However, I did add a "mixed" boot option to support the
dualboot style used in the older ports.

Change-Id: I80cfc48fa78187baa1b1692e8a30ec7137cea37b

1 files changed, 53 insertions, 0 deletions

diff --git a/rbutil/mkzenboot/utils.h b/rbutil/mkzenboot/utils.h
new file mode 100644
index 0000000000..56edb4e20b
--- /dev/null
+++ b/rbutil/mkzenboot/utils.h
@@ -0,0 +1,53 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2013 by 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.
+ *
+ ****************************************************************************/
+#ifndef __UTILS__
+#define __UTILS__
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include "mkzenboot.h"
+#include "hmac-sha1.h"
+
+int filesize(FILE* fd);
+unsigned int le2int(unsigned char* buf);
+unsigned int be2int(unsigned char* buf);
+void int2le(unsigned int val, unsigned char* addr);
+const char* find_firmware_key(const unsigned char* buffer, size_t len);
+uint32_t find_firmware_offset(unsigned char* buffer, size_t len);
+bool crypt_firmware(const char* key, unsigned char* buffer, size_t len);
+bool inflate_to_buffer(const unsigned char *buffer, size_t len,
+    unsigned char* out_buffer, size_t out_len, char** err_msg);
+int cenc_decode(unsigned char* src, int srclen, unsigned char* dst, int dstlen);
+bool bf_cbc_decrypt(const unsigned char* key, size_t keylen, unsigned char* data,
+    size_t datalen, const unsigned char* iv);
+uint32_t swap(uint32_t val);
+enum zen_error_t compute_md5sum(const char *file, uint8_t file_md5sum[16]);
+enum zen_error_t compute_md5sum_buf(void *buf, size_t sz, uint8_t file_md5sum[16]);
+enum zen_error_t read_file(const char *file, void **buffer, size_t *size);
+enum zen_error_t write_file(const char *file, void *buffer, size_t size);
+enum zen_error_t find_pe_data(void *fw, size_t fw_size, uint32_t *data_ptr, uint32_t *data_size);
+int convxdigit(char digit, uint8_t *val);
+
+#endif /* __UTILS__ */
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