From 2e0c558064ad6c92624a0a826721a83321b227af Mon Sep 17 00:00:00 2001
From: Amaury Pouly <amaury.pouly@gmail.com>
Date: Tue, 22 Oct 2013 00:48:33 +0200
Subject: 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
---
 rbutil/mkzenboot/dualboot/bin2c.c | 140 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 rbutil/mkzenboot/dualboot/bin2c.c

(limited to 'rbutil/mkzenboot/dualboot/bin2c.c')

diff --git a/rbutil/mkzenboot/dualboot/bin2c.c b/rbutil/mkzenboot/dualboot/bin2c.c
new file mode 100644
index 0000000000..b02af88a4d
--- /dev/null
+++ b/rbutil/mkzenboot/dualboot/bin2c.c
@@ -0,0 +1,140 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 Dave Chapman
+ *
+ * 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 <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <libgen.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+static off_t filesize(int fd)
+{
+    struct stat buf;
+
+    fstat(fd,&buf);
+    return buf.st_size;
+}
+
+static void write_cfile(const unsigned char* buf, off_t len, FILE* fp, const char *name)
+{
+    int i;
+
+    fprintf(fp,"unsigned char %s[%ld] = {",name,len);
+
+    for (i=0;i<len;i++) {
+        if ((i % 16) == 0) {
+           fprintf(fp,"\n    ");
+        }
+        if (i == (len-1)) {
+            fprintf(fp,"0x%02x",buf[i]);
+        } else if ((i % 16) == 15) {
+            fprintf(fp,"0x%02x,",buf[i]);
+        } else {
+            fprintf(fp,"0x%02x, ",buf[i]);
+        }
+    }
+    fprintf(fp,"\n};\n");
+}
+
+int main (int argc, char* argv[])
+{
+    char* cname;
+    int i;
+    FILE *cfile, *hfile;
+    char cfilename[256], hfilename[256];
+
+    if (argc < 3) {
+        fprintf(stderr,"Usage: bin2c cname file1 [file2 [file3 ...]]\n");
+        return 1;
+    }
+
+    cname=argv[1];
+
+    snprintf(cfilename,256,"%s.c",cname);
+    cfile = fopen(cfilename,"w+");
+    if (cfile == NULL) {
+        fprintf(stderr,"Couldn't open %s\n",cfilename);
+        return 2;
+    }
+
+    snprintf(hfilename,256,"%s.h",cname);
+    hfile = fopen(hfilename,"w+");
+    if (hfile == NULL) {
+        fprintf(stderr,"Couldn't open %s\n",hfilename);
+        fclose(cfile);
+        return 3;
+    }
+
+    fprintf(cfile,"/* Generated by bin2c */\n\n");
+    fprintf(cfile,"#include \"%s\"\n\n", basename(hfilename));
+    fprintf(hfile,"/* Generated by bin2c */\n\n");
+
+    for(i=0; i < argc - 2; i++) {
+        unsigned char* buf;
+        off_t len;
+        off_t orig_len;
+        char *ext;
+        char *array = argv[2+i];
+
+        int fd = open(array,O_RDONLY|O_BINARY);
+        if (fd < 0) {
+            fprintf(stderr,"Can not open %s\n",argv[2+i]);
+            fclose(cfile);
+            fclose(hfile);
+            return 4;
+        }
+
+        orig_len = filesize(fd);
+        /* pad to 32bit */
+        len = (orig_len + 3) & ~3;
+
+        buf = malloc(len);
+        if (read(fd,buf,orig_len) < orig_len) {
+            fprintf(stderr,"Short read, aborting\n");
+            return 5;
+        }
+
+        /* pad to 32bit with zeros */
+        if (len > orig_len)
+            memset(buf+orig_len, 0, len-orig_len);
+        
+        /* remove file extension */
+        ext = strchr (array, '.');
+        if (ext != NULL)
+            *ext = '\0';
+        write_cfile (buf, len, cfile, array);
+        fprintf(hfile,"extern unsigned char %s[%ld];\n",array,len);
+
+        close(fd);
+    }
+
+    fclose(cfile);
+    fclose(hfile);
+
+    return 0;
+}
-- 
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