aboutsummaryrefslogtreecommitdiffstats
path: root/package/utils/otrx/src/otrx.c
blob: 7b02977abbf41d8a8acd26f134fb6ab66d367fae (plain)
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
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
/*
 * otrx
 *
 * Copyright (C) 2015 Rafał Miłecki <zajec5@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.
 */

#include <byteswap.h>
#include <endian.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#if !defined(__BYTE_ORDER)
#error "Unknown byte order"
#endif

#if __BYTE_ORDER == __BIG_ENDIAN
#define cpu_to_le32(x)	bswap_32(x)
#define le32_to_cpu(x)	bswap_32(x)
#elif __BYTE_ORDER == __LITTLE_ENDIAN
#define cpu_to_le32(x)	(x)
#define le32_to_cpu(x)	(x)
#else
#error "Unsupported endianness"
#endif

#define TRX_MAGIC			0x30524448
#define TRX_FLAGS_OFFSET		12
#define TRX_MAX_PARTS			3

struct trx_header {
	uint32_t magic;
	uint32_t length;
	uint32_t crc32;
	uint16_t flags;
	uint16_t version;
	uint32_t offset[3];
};

char *trx_path;
size_t trx_offset = 0;
char *partition[TRX_MAX_PARTS] = {};

static inline size_t otrx_min(size_t x, size_t y) {
	return x < y ? x : y;
}

/**************************************************
 * CRC32
 **************************************************/

static const uint32_t crc32_tbl[] = {
	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,
};

uint32_t otrx_crc32(uint32_t crc, uint8_t *buf, size_t len) {
	while (len) {
		crc = crc32_tbl[(crc ^ *buf) & 0xff] ^ (crc >> 8);
		buf++;
		len--;
	}

	return crc;
}

/**************************************************
 * Check
 **************************************************/

static void otrx_check_parse_options(int argc, char **argv) {
	int c;

	while ((c = getopt(argc, argv, "o:")) != -1) {
		switch (c) {
		case 'o':
			trx_offset = atoi(optarg);
			break;
		}
	}
}

static int otrx_check(int argc, char **argv) {
	FILE *trx;
	struct trx_header hdr;
	size_t bytes, length;
	uint8_t buf[1024];
	uint32_t crc32;
	int err = 0;

	if (argc < 3) {
		fprintf(stderr, "No TRX file passed\n");
		err = -EINVAL;
		goto out;
	}
	trx_path = argv[2];

	optind = 3;
	otrx_check_parse_options(argc, argv);

	trx = fopen(trx_path, "r");
	if (!trx) {
		fprintf(stderr, "Couldn't open %s\n", trx_path);
		err = -EACCES;
		goto out;
	}

	fseek(trx, trx_offset, SEEK_SET);
	bytes = fread(&hdr, 1, sizeof(hdr), trx);
	if (bytes != sizeof(hdr)) {
		fprintf(stderr, "Couldn't read %s header\n", trx_path);
		err =  -EIO;
		goto err_close;
	}

	if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
		fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
		err =  -EINVAL;
		goto err_close;
	}

	length = le32_to_cpu(hdr.length);
	if (length < sizeof(hdr)) {
		fprintf(stderr, "Length read from TRX too low (%zu B)\n", length);
		err = -EINVAL;
		goto err_close;
	}

	crc32 = 0xffffffff;
	fseek(trx, trx_offset + TRX_FLAGS_OFFSET, SEEK_SET);
	length -= TRX_FLAGS_OFFSET;
	while ((bytes = fread(buf, 1, otrx_min(sizeof(buf), length), trx)) > 0) {
		crc32 = otrx_crc32(crc32, buf, bytes);
		length -= bytes;
	}

	if (length) {
		fprintf(stderr, "Couldn't read last %zd B of data from %s\n", length, trx_path);
		err = -EIO;
		goto err_close;
	}

	if (crc32 != le32_to_cpu(hdr.crc32)) {
		fprintf(stderr, "Invalid data crc32: 0x%08x instead of 0x%08x\n", crc32, le32_to_cpu(hdr.crc32));
		err =  -EINVAL;
		goto err_close;
	}

	printf("Found a valid TRX version %d\n", le32_to_cpu(hdr.version));

err_close:
	fclose(trx);
out:
	return err;
}

/**************************************************
 * Create
 **************************************************/

static void otrx_create_parse_options(int argc, char **argv) {
}

static ssize_t otrx_create_append_file(FILE *trx, const char *in_path) {
	FILE *in;
	size_t bytes;
	ssize_t length = 0;
	uint8_t buf[128];

	in = fopen(in_path, "r");
	if (!in) {
		fprintf(stderr, "Couldn't open %s\n", in_path);
		return -EACCES;
	}

	while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) {
		if (fwrite(buf, 1, bytes, trx) != bytes) {
			fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, trx_path);
			length = -EIO;
			break;
		}
		length += bytes;
	}

	fclose(in);

	return length;
}

static ssize_t otrx_create_append_zeros(FILE *trx, size_t length) {
	uint8_t *buf;

	buf = malloc(length);
	if (!buf)
		return -ENOMEM;
	memset(buf, 0, length);

	if (fwrite(buf, 1, length, trx) != length) {
		fprintf(stderr, "Couldn't write %zu B to %s\n", length, trx_path);
		return -EIO;
	}

	return length;
}

static ssize_t otrx_create_align(FILE *trx, size_t curr_offset, size_t alignment) {
	if (curr_offset & (alignment - 1)) {
		size_t length = alignment - (curr_offset % alignment);
		return otrx_create_append_zeros(trx, length);
	}

	return 0;
}

static int otrx_create_write_hdr(FILE *trx, struct trx_header *hdr) {
	size_t bytes, length;
	uint8_t *buf;
	uint32_t crc32;

	hdr->magic = cpu_to_le32(TRX_MAGIC);
	hdr->version = 1;

	fseek(trx, 0, SEEK_SET);
	bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
	if (bytes != sizeof(struct trx_header)) {
		fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
		return -EIO;
	}

	length = le32_to_cpu(hdr->length);

	buf = malloc(length);
	if (!buf) {
		fprintf(stderr, "Couldn't alloc %zu B buffer\n", length);
		return -ENOMEM;
	}

	fseek(trx, 0, SEEK_SET);
	bytes = fread(buf, 1, length, trx);
	if (bytes != length) {
		fprintf(stderr, "Couldn't read %zu B of data from %s\n", length, trx_path);
		return -ENOMEM;
	}

	crc32 = otrx_crc32(0xffffffff, buf + TRX_FLAGS_OFFSET, length - TRX_FLAGS_OFFSET);
	hdr->crc32 = cpu_to_le32(crc32);

	fseek(trx, 0, SEEK_SET);
	bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
	if (bytes != sizeof(struct trx_header)) {
		fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
		return -EIO;
	}

	return 0;
}

static int otrx_create(int argc, char **argv) {
	FILE *trx;
	struct trx_header hdr = {};
	ssize_t sbytes;
	size_t curr_idx = 0;
	size_t curr_offset = sizeof(hdr);
	int c;
	int err = 0;

	if (argc < 3) {
		fprintf(stderr, "No TRX file passed\n");
		err = -EINVAL;
		goto out;
	}
	trx_path = argv[2];

	optind = 3;
	otrx_create_parse_options(argc, argv);

	trx = fopen(trx_path, "w+");
	if (!trx) {
		fprintf(stderr, "Couldn't open %s\n", trx_path);
		err = -EACCES;
		goto out;
	}
	fseek(trx, curr_offset, SEEK_SET);

	optind = 3;
	while ((c = getopt(argc, argv, "f:b:")) != -1) {
		switch (c) {
		case 'f':
			if (curr_idx >= TRX_MAX_PARTS) {
				err = -ENOSPC;
				fprintf(stderr, "Reached TRX partitions limit, no place for %s\n", optarg);
				goto err_close;
			}

			sbytes = otrx_create_append_file(trx, optarg);
			if (sbytes < 0) {
				fprintf(stderr, "Failed to append file %s\n", optarg);
			} else {
				hdr.offset[curr_idx++] = curr_offset;
				curr_offset += sbytes;
			}

			sbytes = otrx_create_align(trx, curr_offset, 4);
			if (sbytes < 0)
				fprintf(stderr, "Failed to append zeros\n");
			else
				curr_offset += sbytes;

			break;
		case 'b':
			sbytes = strtol(optarg, NULL, 0) - curr_offset;
			if (sbytes < 0) {
				fprintf(stderr, "Current TRX length is 0x%zx, can't pad it with zeros to 0x%lx\n", curr_offset, strtol(optarg, NULL, 0));
			} else {
				sbytes = otrx_create_append_zeros(trx, sbytes);
				if (sbytes < 0)
					fprintf(stderr, "Failed to append zeros\n");
				else
					curr_offset += sbytes;
			}
			break;
		}
		if (err)
			break;
	}

	hdr.length = curr_offset;
	otrx_create_write_hdr(trx, &hdr);
err_close:
	fclose(trx);
out:
	return err;
}

/**************************************************
 * Extract
 **************************************************/

static void otrx_extract_parse_options(int argc, char **argv) {
	int c;

	while ((c = getopt(argc, argv, "c:e:o:1:2:3:")) != -1) {
		switch (c) {
		case 'o':
			trx_offset = atoi(optarg);
			break;
		case '1':
			partition[0] = optarg;
			break;
		case '2':
			partition[1] = optarg;
			break;
		case '3':
			partition[2] = optarg;
			break;
		}
	}
}

static int otrx_extract_copy(FILE *trx, size_t offset, size_t length, char *out_path) {
	FILE *out;
	size_t bytes;
	uint8_t *buf;
	int err = 0;

	out = fopen(out_path, "w");
	if (!out) {
		fprintf(stderr, "Couldn't open %s\n", out_path);
		err = -EACCES;
		goto out;
	}

	buf = malloc(length);
	if (!buf) {
		fprintf(stderr, "Couldn't alloc %zu B buffer\n", length);
		err =  -ENOMEM;
		goto err_close;
	}

	fseek(trx, offset, SEEK_SET);
	bytes = fread(buf, 1, length, trx);
	if (bytes != length) {
		fprintf(stderr, "Couldn't read %zu B of data from %s\n", length, trx_path);
		err =  -ENOMEM;
		goto err_free_buf;
	};

	bytes = fwrite(buf, 1, length, out);
	if (bytes != length) {
		fprintf(stderr, "Couldn't write %zu B to %s\n", length, out_path);
		err =  -ENOMEM;
		goto err_free_buf;
	}

	printf("Extracted 0x%zx bytes into %s\n", length, out_path);

err_free_buf:
	free(buf);
err_close:
	fclose(out);
out:
	return err;
}

static int otrx_extract(int argc, char **argv) {
	FILE *trx;
	struct trx_header hdr;
	size_t bytes;
	int i;
	int err = 0;

	if (argc < 3) {
		fprintf(stderr, "No TRX file passed\n");
		err = -EINVAL;
		goto out;
	}
	trx_path = argv[2];

	optind = 3;
	otrx_extract_parse_options(argc, argv);

	trx = fopen(trx_path, "r");
	if (!trx) {
		fprintf(stderr, "Couldn't open %s\n", trx_path);
		err = -EACCES;
		goto out;
	}

	fseek(trx, trx_offset, SEEK_SET);
	bytes = fread(&hdr, 1, sizeof(hdr), trx);
	if (bytes != sizeof(hdr)) {
		fprintf(stderr, "Couldn't read %s header\n", trx_path);
		err =  -EIO;
		goto err_close;
	}

	if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
		fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
		err =  -EINVAL;
		goto err_close;
	}

	for (i = 0; i < TRX_MAX_PARTS; i++) {
		size_t length;

		if (!partition[i])
			continue;
		if (!hdr.offset[i]) {
			printf("TRX doesn't contain partition %d, can't extract %s\n", i + 1, partition[i]);
			continue;
		}

		if (i + 1 >= TRX_MAX_PARTS || !hdr.offset[i + 1])
			length = le32_to_cpu(hdr.length) - le32_to_cpu(hdr.offset[i]);
		else
			length = le32_to_cpu(hdr.offset[i + 1]) - le32_to_cpu(hdr.offset[i]);

		otrx_extract_copy(trx, trx_offset + le32_to_cpu(hdr.offset[i]), length, partition[i]);
	}

err_close:
	fclose(trx);
out:
	return err;
}

/**************************************************
 * Start
 **************************************************/

static void usage() {
	printf("Usage:\n");
	printf("\n");
	printf("Checking TRX file:\n");
	printf("\totrx check <file> [options]\tcheck if file is a valid TRX\n");
	printf("\t-o offset\t\t\toffset of TRX data in file (default: 0)\n");
	printf("\n");
	printf("Creating new TRX file:\n");
	printf("\totrx create <file> [options] [partitions]\n");
	printf("\t-f file\t\t\t\t[partition] start new partition with content copied from file\n");
	printf("\t-b offset\t\t\t[partition] append zeros to partition till reaching absolute offset\n");
	printf("\n");
	printf("Extracting from TRX file:\n");
	printf("\totrx extract <file> [options]\textract partitions from TRX file\n");
	printf("\t-o offset\t\t\toffset of TRX data in file (default: 0)\n");
	printf("\t-1 file\t\t\t\tfile to extract 1st partition to (optional)\n");
	printf("\t-2 file\t\t\t\tfile to extract 2nd partition to (optional)\n");
	printf("\t-3 file\t\t\t\tfile to extract 3rd partition to (optional)\n");
}

int main(int argc, char **argv) {
	if (argc > 1) {
		if (!strcmp(argv[1], "check"))
			return otrx_check(argc, argv);
		else if (!strcmp(argv[1], "create"))
			return otrx_create(argc, argv);
		else if (!strcmp(argv[1], "extract"))
			return otrx_extract(argc, argv);
	}

	usage();
	return 0;
}