ramips: add om-watchdog to rut5xx DEVICE_PACKAGES
[lede.git] / tools / firmware-utils / src / mksenaofw.c
1 /*
2  *
3  *  Copyright (C) 2012 OpenWrt.org
4  *  Copyright (C) 2012 Mikko Hissa <mikko.hissa@uta.fi>
5  *
6  *  This program is free software; you can redistribute it and/or modify it
7  *  under the terms of the GNU General Public License version 2 as published
8  *  by the Free Software Foundation.
9  *
10  */
11
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <stdarg.h>
16 #include <libgen.h>
17 #include <errno.h>
18 #include <arpa/inet.h>
19 #include <unistd.h>
20 #include "md5.h"
21
22 #define HDR_LEN                 0x60
23 #define BUF_SIZE                0x200
24 #define VERSION_SIZE            0x10
25 #define MD5_SIZE                0x10
26 #define PAD_SIZE                0x20
27
28 #define DEFAULT_BLOCK_SIZE      65535
29
30 #define DEFAULT_HEAD_VALUE      0x0
31 #define DEFAULT_VERSION         "123"
32 #define DEFAULT_MAGIC           0x12345678
33
34 typedef struct {
35         uint32_t head;
36         uint32_t vendor_id;
37         uint32_t product_id;
38         uint8_t  version[VERSION_SIZE];
39         uint32_t firmware_type;
40         uint32_t filesize;
41         uint32_t zero;
42         uint8_t  md5sum[MD5_SIZE];
43         uint8_t  pad[PAD_SIZE];
44         uint32_t chksum;
45         uint32_t magic;
46 } img_header;
47
48 typedef struct {
49         uint8_t id;
50         char * name;
51 } firmware_type;
52
53 typedef enum {
54         NONE, ENCODE, DECODE
55 } op_mode;
56
57 static firmware_type FIRMWARE_TYPES[] = {
58         { 0x01, "bootloader" },
59         { 0x02, "kernel" },
60         { 0x03, "kernelapp" },
61         { 0x04, "apps" },
62         /* The types below this line vary by manufacturer */
63         { 0x05, "littleapps (D-Link)/factoryapps (EnGenius)" },
64         { 0x06, "sounds (D-Link)/littleapps (EnGenius)" },
65         { 0x07, "userconfig (D-Link)/appdata (EnGenius)" },
66         { 0x08, "userconfig (EnGenius)"},
67         { 0x09, "odmapps (EnGenius)"},
68         { 0x0a, "factoryapps (D-Link)" },
69         { 0x0b, "odmapps (D-Link)" },
70         { 0x0c, "langpack (D-Link)" }
71 };
72
73 static long get_file_size(const char *filename)
74 {
75         FILE *fp_file;
76         long result;
77
78         fp_file = fopen(filename, "r");
79         if (!fp_file)
80                 return -1;
81         fseek(fp_file, 0, SEEK_END);
82         result = ftell(fp_file);
83         fclose(fp_file);
84         return result;
85 }
86
87 static int header_checksum(void *data, int len)
88 {
89         int i;
90         int sum;
91
92         sum = 0;
93         if (data != NULL && len >= 0) {
94                 for (i = 0; i < len; ++i)
95                         sum += *(unsigned char *) (data + i);
96                 return sum;
97         }
98
99         return -1;
100 }
101
102 static int md5_file(const char *filename, uint8_t *dst)
103 {
104         FILE *fp_src;
105         MD5_CTX ctx;
106         char buf[BUF_SIZE];
107         size_t bytes_read;
108
109         MD5_Init(&ctx);
110
111         fp_src = fopen(filename, "r+b");
112         if (!fp_src) {
113                 return -1;
114         }
115         while (!feof(fp_src)) {
116                 bytes_read = fread(&buf, 1, BUF_SIZE, fp_src);
117                 MD5_Update(&ctx, &buf, bytes_read);
118         }
119         fclose(fp_src);
120
121         MD5_Final(dst, &ctx);
122
123         return 0;
124 }
125
126 static int encode_image(const char *input_file_name,
127                 const char *output_file_name, img_header *header, int block_size)
128 {
129         char buf[BUF_SIZE];
130         size_t bytes_read;
131         size_t pad_len = 0;
132         size_t bytes_avail;
133
134         FILE *fp_input;
135         FILE *fp_output;
136
137         int i;
138         long magic;
139
140         fp_input = fopen(input_file_name, "r+b");
141         if (!fp_input) {
142                 fprintf(stderr, "Cannot open %s !!\n", input_file_name);
143                 return -1;
144         }
145
146         fp_output = fopen(output_file_name, "w+b");
147         if (!fp_output) {
148                 fprintf(stderr, "Cannot open %s !!\n", output_file_name);
149                 fclose(fp_input);
150                 return -1;
151         }
152
153         header->filesize = get_file_size(input_file_name);
154         if (!header->filesize) {
155                 fprintf(stderr, "File %s open/size error!\n", input_file_name);
156                 fclose(fp_input);
157                 fclose(fp_output);
158                 return -1;
159         }
160         /*
161          * Zero padding
162          */
163         if (block_size > 0) {
164                 pad_len = block_size - (header->filesize % block_size);
165         }
166
167         if (md5_file(input_file_name, (uint8_t *) &header->md5sum) < 0) {
168                 fprintf(stderr, "MD5 failed on file %s\n", input_file_name);
169                 fclose(fp_input);
170                 fclose(fp_output);
171                 return -1;
172         }
173         header->zero = 0;
174         header->chksum = header_checksum(header, HDR_LEN);
175         header->head = htonl(header->head);
176         header->vendor_id = htonl(header->vendor_id);
177         header->product_id = htonl(header->product_id);
178         header->firmware_type = htonl(header->firmware_type);
179         header->filesize = htonl(header->filesize);
180         header->chksum = htonl(header->chksum);
181         magic = header->magic;
182         header->magic = htonl(header->magic);
183
184         fwrite(header, HDR_LEN, 1, fp_output);
185
186         while (!feof(fp_input) || pad_len > 0) {
187
188                 if (!feof(fp_input))
189                         bytes_read = fread(&buf, 1, BUF_SIZE, fp_input);
190                 else
191                         bytes_read = 0;
192
193                 /*
194                  * No more bytes read, start padding
195                  */
196                 if (bytes_read < BUF_SIZE && pad_len > 0) {
197                         bytes_avail = BUF_SIZE - bytes_read;
198                         memset( &buf[bytes_read], 0, bytes_avail);
199                         bytes_read += bytes_avail < pad_len ? bytes_avail : pad_len;
200                         pad_len -= bytes_avail < pad_len ? bytes_avail : pad_len;
201                 }
202
203                 for (i = 0; i < bytes_read; i++)
204                         buf[i] ^= magic >> (i % 8) & 0xff;
205                 fwrite(&buf, bytes_read, 1, fp_output);
206         }
207
208         fclose(fp_input);
209         fclose(fp_output);
210         return 1;
211 }
212
213 int decode_image(const char *input_file_name, const char *output_file_name)
214 {
215         img_header header;
216         char buf[BUF_SIZE];
217
218         FILE *fp_input;
219         FILE *fp_output;
220         unsigned int i;
221
222         size_t bytes_read;
223         size_t bytes_written;
224
225         fp_input = fopen(input_file_name, "r+b");
226         if (!fp_input) {
227                 fprintf(stderr, "Cannot open %s !!\n", input_file_name);
228                 fclose(fp_input);
229                 return -1;
230         }
231
232         fp_output = fopen(output_file_name, "w+b");
233         if (!fp_output) {
234                 fprintf(stderr, "Cannot open %s !!\n", output_file_name);
235                 fclose(fp_output);
236                 return -1;
237         }
238
239         if (fread(&header, 1, HDR_LEN, fp_input) != HDR_LEN) {
240                 fprintf(stderr, "Incorrect header size!!");
241                 fclose(fp_input);
242                 fclose(fp_output);
243                 return -1;
244         }
245
246         header.head = ntohl(header.head);
247         header.vendor_id = ntohl(header.vendor_id);
248         header.product_id = ntohl(header.product_id);
249         header.firmware_type = ntohl(header.firmware_type);
250         header.filesize = ntohl(header.filesize);
251         header.chksum = ntohl(header.chksum);
252         header.magic = ntohl(header.magic);
253
254         bytes_written = 0;
255         while (!feof(fp_input)) {
256
257                 bytes_read = fread(&buf, 1, BUF_SIZE, fp_input);
258                 for (i = 0; i < bytes_read; i++)
259                         buf[i] ^= header.magic >> (i % 8) & 0xff;
260
261                 /*
262                  * Handle padded source file
263                  */
264                 if (bytes_written + bytes_read > header.filesize) {
265                         bytes_read = header.filesize - bytes_written;
266                         if (bytes_read > 0)
267                                 fwrite(&buf, bytes_read, 1, fp_output);
268                         break;
269                 }
270
271                 fwrite(&buf, bytes_read, 1, fp_output);
272                 bytes_written += bytes_read;
273         }
274
275         fclose(fp_input);
276         fclose(fp_output);
277
278         return 1;
279 }
280
281 static void usage(const char *progname, int status)
282 {
283         FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
284         int i;
285
286         fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
287         fprintf(stream, "\n"
288                         "Options:\n"
289                         "  -e <file>            encode image file <file>\n"
290                         "  -d <file>            decode image file <file>\n"
291                         "  -o <file>            write output to the file <file>\n"
292                         "  -t <type>            set image type to <type>\n"
293                         "                       valid image <type> values:\n");
294         for (i = 0; i < sizeof(FIRMWARE_TYPES) / sizeof(firmware_type); i++) {
295                 fprintf(stream, "                       %-5i= %s\n", FIRMWARE_TYPES[i].id,
296                                 FIRMWARE_TYPES[i].name);
297         }
298         fprintf(stream, "  -v <version>         set image version to <version>\n"
299                         "  -r <vendor>          set image vendor id to <vendor>\n"
300                         "  -p <product>         set image product id to <product>\n"
301                         "  -m <magic>           set encoding magic <magic>\n"
302                         "  -z                   enable image padding to <blocksize>\n"
303                         "  -b <blocksize>       set image <blocksize>, defaults to %u\n"
304                         "  -h                   show this screen\n", DEFAULT_BLOCK_SIZE);
305         exit(status);
306 }
307
308 int main(int argc, char *argv[])
309 {
310         int opt;
311         char *input_file, *output_file, *progname = NULL;
312         op_mode mode = NONE;
313         int tmp, i, pad = 0;
314         int block_size;
315         img_header header;
316
317         block_size = DEFAULT_BLOCK_SIZE;
318         progname = basename(argv[0]);
319
320         memset(&header, 0, sizeof( img_header ));
321         header.magic = DEFAULT_MAGIC;
322         header.head = DEFAULT_HEAD_VALUE;
323         strncpy( (char*)&header.version, DEFAULT_VERSION, VERSION_SIZE - 1);
324
325         while ((opt = getopt(argc, argv, ":o:e:d:t:v:r:p:m:b:h?z")) != -1) {
326                 switch (opt) {
327                 case 'e':
328                         input_file = optarg;
329                         mode = ENCODE;
330                         break;
331                 case 'd':
332                         input_file = optarg;
333                         mode = DECODE;
334                         break;
335                 case 'o':
336                         output_file = optarg;
337                         break;
338                 case 't':
339                         tmp = strtol(optarg, 0, 10);
340                         for (i = 0; i < sizeof(FIRMWARE_TYPES) / sizeof(firmware_type);
341                                         i++) {
342                                 if (FIRMWARE_TYPES[i].id == tmp) {
343                                         header.firmware_type = FIRMWARE_TYPES[i].id;
344                                         break;
345                                 }
346                         }
347                         if (header.firmware_type == 0) {
348                                 fprintf(stderr, "Invalid firmware type \"0\"!\n");
349                                 usage(progname, EXIT_FAILURE);
350                         }
351                         break;
352                 case 'v':
353                         strncpy( (char*)&header.version, optarg,
354                                         VERSION_SIZE - 1);
355                         break;
356                 case 'r':
357                         header.vendor_id = strtol(optarg, 0, 0);
358                         break;
359                 case 'p':
360                         header.product_id = strtol(optarg, 0, 0);
361                         break;
362                 case 'm':
363                         header.magic = strtoul(optarg, 0, 16);
364                         break;
365                 case 'z':
366                         pad = 1;
367                         break;
368                 case 'b':
369                         block_size = strtol(optarg, 0, 10);
370                         break;
371                 case 'h':
372                         usage(progname, EXIT_SUCCESS);
373                         break;
374                 case ':':
375                         fprintf(stderr, "Option -%c requires an operand\n", optopt);
376                         usage(progname, EXIT_FAILURE);
377                         break;
378                 case '?':
379                         fprintf(stderr, "Unrecognized option: -%c\n", optopt);
380                         usage(progname, EXIT_FAILURE);
381                         break;
382                 default:
383                         usage(progname, EXIT_FAILURE);
384                         break;
385                 }
386         }
387
388         /* Check required arguments */
389         if (mode == NONE) {
390                 fprintf(stderr, "A mode must be defined\n");
391                 usage(progname, EXIT_FAILURE);
392         }
393
394         if (input_file == NULL || output_file == NULL) {
395                 fprintf(stderr, "Input and output files must be defined\n");
396                 usage(progname, EXIT_FAILURE);
397         }
398
399         if (mode == DECODE) {
400                 if (decode_image(input_file, output_file) < 0)
401                                 return EXIT_FAILURE;
402
403                 return EXIT_SUCCESS;
404         }
405
406         if (header.firmware_type == 0) {
407                 fprintf(stderr, "Firmware type must be defined\n");
408                 usage(progname, EXIT_FAILURE);
409         }
410
411         if (header.vendor_id == 0 || header.product_id == 0) {
412                 fprintf(stderr, "Vendor ID and Product ID must be defined and non-zero\n");
413                 usage(progname, EXIT_FAILURE);
414         }
415
416         if (encode_image(input_file, output_file, &header, pad ? block_size : 0) < 0)
417                 return EXIT_FAILURE;
418
419         return EXIT_SUCCESS;
420 }