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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/*
* spw303v.c - partially based on OpenWrt's imagetag.c and addpattern.c
*
* Copyright (C) 2011 Jonas Gorski <jonas.gorski@gmail.com>
*
* 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 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
*/
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/stat.h>
#define IMAGE_LEN 10 /* Length of Length Field */
#define ADDRESS_LEN 12 /* Length of Address field */
#define TAGID_LEN 6 /* Length of tag ID */
#define TAGINFO_LEN 20 /* Length of vendor information field in tag */
#define TAGVER_LEN 4 /* Length of Tag Version */
#define TAGLAYOUT_LEN 4 /* Length of FlashLayoutVer */
struct spw303v_tag
{
unsigned char tagVersion[4]; // tag version. Will be 2 here.
unsigned char signiture_1[20]; // text line for company info
unsigned char signiture_2[14]; // additional info (can be version number)
unsigned char chipId[6]; // chip id
unsigned char boardId[16]; // board id
unsigned char bigEndian[2]; // if = 1 - big, = 0 - little endia of the host
unsigned char totalImageLen[IMAGE_LEN]; // the sum of all the following length
unsigned char cfeAddress[ADDRESS_LEN]; // if non zero, cfe starting address
unsigned char cfeLen[IMAGE_LEN]; // if non zero, cfe size in clear ASCII text.
unsigned char rootfsAddress[ADDRESS_LEN]; // if non zero, filesystem starting address
unsigned char rootfsLen[IMAGE_LEN]; // if non zero, filesystem size in clear ASCII text.
unsigned char kernelAddress[ADDRESS_LEN]; // if non zero, kernel starting address
unsigned char kernelLen[IMAGE_LEN]; // if non zero, kernel size in clear ASCII text.
unsigned char certf1Address[ADDRESS_LEN];
unsigned char certf1Len[6];
unsigned char certf2Address[ADDRESS_LEN];
unsigned char certf2Len[6];
unsigned char certf3Address[ADDRESS_LEN];
unsigned char certf3Len[6];
unsigned char httpsFileSize[4];
unsigned char tr64FileSize[4];
unsigned char tr69FileSize[4];
unsigned char filesmap[4];
unsigned char imageSequence[4]; // incrments everytime an image is flashed
unsigned char reserved[4]; // reserved for later use
unsigned char imageCRC[4]; // 216-219: CRC32 of images
unsigned char reserved2[16]; // 220-235: Unused at present
unsigned char headerCRC[4]; // 236-239: CRC32 of header excluding tagVersion
unsigned char reserved3[16]; // 240-255: Unused at present
};
static uint32_t crc32tab[256] = {
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};
#define IMAGETAG_CRC_START 0xFFFFFFFF
#define IMAGETAG_MAGIC1_TCOM "AAAAAAAA Corporatio"
static char fake_data[] = {
0x18, 0x21, 0x21, 0x18, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21 ,0x18,
0x21, 0x24, 0x21, 0x1b, 0x18, 0x18, 0x24, 0x24, 0x18, 0x21, 0x21, 0x21,
0x21, 0x21, 0x21, 0x21, 0x1b, 0x18, 0x18, 0x24, 0x24, 0x21, 0x21, 0x21,
0x21, 0x21, 0x21, 0x21, 0x18, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x18,
0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x18, 0x21, 0x21,
0x21, 0x21, 0x21, 0x21,
};
uint32_t crc32(uint32_t crc, uint8_t *data, size_t len)
{
while (len--)
crc = (crc >> 8) ^ crc32tab[(crc ^ *data++) & 0xFF];
return crc;
}
void fix_header(void *buf)
{
struct spw303v_tag *tag = buf;
uint32_t crc;
/* Replace signature with custom t-com one */
memset(tag->signiture_1, 0, 20);
memcpy(tag->signiture_1, IMAGETAG_MAGIC1_TCOM, strlen(IMAGETAG_MAGIC1_TCOM));
/* Clear cert fields to remove information_* data */
memset(tag->certf1Address, 0, 74);
/* replace image crc with modified one */
crc = ntohl(*((uint32_t *)&tag->imageCRC));
crc = htonl(crc32(crc, fake_data, 64));
memcpy(tag->imageCRC, &crc, 4);
/* Update tag crc */
crc = htonl(crc32(IMAGETAG_CRC_START, buf, 236));
memcpy(tag->headerCRC, &crc, 4);
}
void usage(void) __attribute__ (( __noreturn__ ));
void usage(void)
{
fprintf(stderr, "Usage: spw303v [-i <inputfile>] [-o <outputfile>]\n");
exit(EXIT_FAILURE);
}
int main(int argc, char **argv)
{
char buf[1024]; /* keep this at 1k or adjust garbage calc below */
FILE *in = stdin;
FILE *out = stdout;
char *ifn = NULL;
char *ofn = NULL;
int c;
int v0, v1, v2;
size_t n;
int first_block = 1;
uint32_t image_crc = IMAGETAG_CRC_START;
while ((c = getopt(argc, argv, "i:o:h")) != -1) {
switch (c) {
case 'i':
ifn = optarg;
break;
case 'o':
ofn = optarg;
break;
case 'h':
default:
usage();
}
}
if (optind != argc || optind == 1) {
fprintf(stderr, "illegal arg \"%s\"\n", argv[optind]);
usage();
}
if (ifn && !(in = fopen(ifn, "r"))) {
fprintf(stderr, "can not open \"%s\" for reading\n", ifn);
usage();
}
if (ofn && !(out = fopen(ofn, "w"))) {
fprintf(stderr, "can not open \"%s\" for writing\n", ofn);
usage();
}
while ((n = fread(buf, 1, sizeof(buf), in)) > 0) {
if (n < sizeof(buf)) {
if (ferror(in)) {
FREAD_ERROR:
fprintf(stderr, "fread error\n");
return EXIT_FAILURE;
}
}
if (first_block && n >= 256) {
fix_header(buf);
first_block = 0;
}
image_crc = crc32(image_crc, buf, n);
if (!fwrite(buf, n, 1, out)) {
FWRITE_ERROR:
fprintf(stderr, "fwrite error\n");
return EXIT_FAILURE;
}
}
if (ferror(in)) {
goto FREAD_ERROR;
}
if (fflush(out)) {
goto FWRITE_ERROR;
}
fclose(in);
fclose(out);
return EXIT_SUCCESS;
}
|
