1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* 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; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) 2012 John Crispin <blogic@openwrt.org>
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include "LzmaWrapper.h"
#define FW_NAME "/tmp/firmware-speedport-w921v-1.46.000.bin"
#define MAGIC 0x50
#define MAGIC_SZ 0x3FFC00
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define MAGIC_PART 0x12345678
#define MAGIC_LZMA 0x8000005D
#define MAGIC_ANNEX_B 0x3C
#define MAGIC_TAPI 0x5A
#else
#define MAGIC_PART 0x78563412
#define MAGIC_LZMA 0x5D000080
#define MAGIC_ANNEX_B 0x3C000000
#define MAGIC_TAPI 0x5A000000
#endif
const char* part_type(unsigned int id)
{
switch(id) {
case MAGIC_ANNEX_B:
return "/tmp/vr9_dsl_fw_annex_b.bin";
case MAGIC_TAPI:
return "/tmp/vr9_tapi_fw.bin";
}
printf("\tUnknown lzma type 0x%02X\n", id);
return "/tmp/unknown.lzma";
}
int main(int argc, char **argv)
{
struct stat s;
unsigned char *buf_orig;
unsigned int *buf;
int buflen;
int fd;
int i;
int err;
int start = 0, end = 0;
printf("Arcadyan Firmware cutter v0.1\n");
printf("-----------------------------\n");
printf("This tool extracts the different parts of an arcadyan firmware update file\n");
printf("This tool is for private use only. The Firmware that gets extracted has a license that forbids redistribution\n");
printf("Please only run this if you understand the risks\n\n");
printf("I understand the risks ? (y/N)\n");
if (getchar() != 'y')
return -1;
if (stat(FW_NAME, &s) != 0) {
printf("Failed to find %s\n", FW_NAME);
printf("Ask Google or try https://www.telekom.de/hilfe/downloads/firmware-speedport-w921v-1.45.000.bin\n");
return -1;
}
buf_orig = malloc(s.st_size);
buf = malloc(s.st_size);
if (!buf_orig || !buf) {
printf("Failed to alloc %d bytes\n", s.st_size);
return -1;
}
fd = open(FW_NAME, O_RDONLY);
if (fd < 0) {
printf("Unable to open %s\n", FW_NAME);
return -1;
}
buflen = read(fd, buf_orig, s.st_size);
close(fd);
if (buflen != s.st_size) {
printf("Loaded %d instead of %d bytes inside %s\n", buflen, s.st_size, FW_NAME);
return -1;
}
/* <magic> */
buf_orig++;
buflen -= 1;
for (i = 0; i < MAGIC_SZ; i++) {
if ((i % 16) < 3)
buf_orig[i] = buf_orig[i + 16] ^ MAGIC;
else
buf_orig[i] = buf_orig[i] ^ MAGIC;
}
buflen -= 3;
memmove(&buf_orig[MAGIC_SZ], &buf_orig[MAGIC_SZ + 3], buflen - MAGIC_SZ);
memcpy(buf, buf_orig, s.st_size);
/* </magic> */
do {
if (buf[end] == MAGIC_PART) {
end += 2;
printf("Found partition at 0x%08X with size %d\n",
start * sizeof(unsigned int),
(end - start) * sizeof(unsigned int));
if (buf[start] == MAGIC_LZMA) {
int dest_len = 1024 * 1024;
int len = buf[end - 3];
unsigned int id = buf[end - 6];
const char *type = part_type(id);
unsigned char *dest;
dest = malloc(dest_len);
if (!dest) {
printf("Failed to alloc dest buffer\n");
return -1;
}
if (lzma_inflate((unsigned char*)&buf[start], len, dest, &dest_len)) {
printf("Failed to decompress data\n");
return -1;
}
fd = creat(type, S_IRUSR | S_IWUSR);
if (fd != -1) {
if (write(fd, dest, dest_len) != dest_len)
printf("\tFailed to write %d bytes\n", dest_len);
else
printf("\tWrote %d bytes to %s\n", dest_len, type);
close(fd);
} else {
printf("\tFailed to open %s\n", type);
}
free(dest);
} else {
printf("\tThis is not lzma\n");
}
start = end;
} else {
end++;
}
} while(end < buflen / sizeof(unsigned int));
return 0;
}
|
