4 * Copyright (C) 2018 Paweł Dembicki <paweldembicki@gmail.com>
6 * This tool is based on mktplinkfw.
7 * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
8 * Copyright (C) 2008,2009 Wang Jian <lark@linux.net.cn>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
20 #include <unistd.h> /* for unlink() */
22 #include <getopt.h> /* for getopt() */
28 #include <zlib.h> /*for crc32 */
30 #include "mkdlinkfw-lib.h"
32 /* ARM update header 2.0
33 * used only in factory images to erase and flash selected area
36 uint8_t rom_id[12]; /* 12-bit rom-id unique per router type */
37 uint16_t derange; /* used for scramble header */
38 uint16_t image_checksum; /* jboot_checksum of flashed data */
40 uint32_t space1; /* zeros */
41 uint32_t space2; /* zeros */
42 uint16_t space3; /* zerosu */
43 uint8_t lpvs; /* must be 0x01 */
44 uint8_t mbz; /* bust be 0 */
45 uint32_t time_stamp; /* timestamp calculated in jboot way */
47 uint32_t erase_start; /* erase start address */
48 uint32_t erase_length; /* erase length address */
49 uint32_t data_offset; /* data start address */
50 uint32_t data_length; /* data length address */
52 uint32_t space4; /* zeros */
53 uint32_t space5; /* zeros */
54 uint32_t space6; /* zeros */
55 uint32_t space7; /* zeros */
57 uint16_t header_id; /* magic 0x4842 */
58 uint16_t header_version; /* 0x02 for 2.0 */
59 uint16_t space8; /* zeros */
60 uint8_t section_id; /* section id */
61 uint8_t image_info_type; /* (?) 0x04 in factory images */
62 uint32_t image_info_offset; /* (?) zeros in factory images */
63 uint16_t family_member; /* unique per router type */
64 uint16_t header_checksum; /* negated jboot_checksum of header data */
67 struct stag_header { /* used only of sch2 wrapped kernel data */
68 uint8_t cmark; /* in factory 0xFF ,in sysuograde must be the same as id */
69 uint8_t id; /* 0x04 */
70 uint16_t magic; /* magic 0x2B24 */
71 uint32_t time_stamp; /* timestamp calculated in jboot way */
72 uint32_t image_length; /* lentgh of kernel + sch2 header */
73 uint16_t image_checksum; /* negated jboot_checksum of sch2 + kernel */
74 uint16_t tag_checksum; /* negated jboot_checksum of stag header data */
77 struct sch2_header { /* used only in kernel partitions */
78 uint16_t magic; /* magic 0x2124 */
79 uint8_t cp_type; /* 0x00 for flat, 0x01 for jz, 0x02 for gzip, 0x03 for lzma */
80 uint8_t version; /* 0x02 for sch2 */
81 uint32_t ram_addr; /* ram entry address */
82 uint32_t image_len; /* kernel image length */
83 uint32_t image_crc32; /* kernel image crc */
84 uint32_t start_addr; /* ram start address */
85 uint32_t rootfs_addr; /* rootfs flash address */
86 uint32_t rootfs_len; /* rootfls length */
87 uint32_t rootfs_crc32; /* rootfs crc32 */
88 uint32_t header_crc32; /* sch2 header crc32, durring calculation this area is replaced by zero */
89 uint16_t header_length; /* sch2 header length: 0x28 */
90 uint16_t cmd_line_length; /* cmd line length, known zeros */
94 static struct file_info inspect_info;
95 struct file_info kernel_info;
96 struct file_info rootfs_info;
97 struct file_info image_info;
101 uint32_t firmware_size;
102 uint16_t family_member;
103 char *rom_id[12] = { 0 };
108 static void usage(int status)
110 fprintf(stderr, "Usage: %s [OPTIONS...]\n", progname);
114 " -i <file> inspect given firmware file <file>\n"
115 " -f set family member id (hexval prefixed with 0x)\n"
116 " -F <file> read image and convert it to FACTORY\n"
117 " -k <file> read kernel image from the file <file>\n"
118 " -r <file> read rootfs image from the file <file>\n"
119 " -o <file> write output to the file <file>\n"
120 " -s <size> set firmware partition size\n"
121 " -m <version> set rom id to <version> (12-bit string val: \"DLK*********\")\n"
122 " -h show this screen\n");
127 void print_auh_header(struct auh_header *printed_header)
129 printf("\trom_id: %s\n"
130 "\tderange: 0x%04X\n"
131 "\timage_checksum: 0x%04X\n"
137 "\ttime_stamp: 0x%08X\n"
138 "\terase_start: 0x%08X\n"
139 "\terase_length: 0x%08X\n"
140 "\tdata_offset: 0x%08X\n"
141 "\tdata_length: 0x%08X\n"
146 "\theader_id: 0x%04X\n"
147 "\theader_version: 0x%02X\n"
149 "\tsection_id: 0x%02X\n"
150 "\timage_info_type: 0x%02X\n"
151 "\timage_info_offset 0x%08X\n"
152 "\tfamily_member: 0x%04X\n"
153 "\theader_checksum: 0x%04X\n",
154 printed_header->rom_id,
155 printed_header->derange,
156 printed_header->image_checksum,
157 printed_header->space1,
158 printed_header->space2,
159 printed_header->space3,
160 printed_header->lpvs,
162 printed_header->time_stamp,
163 printed_header->erase_start,
164 printed_header->erase_length,
165 printed_header->data_offset,
166 printed_header->data_length,
167 printed_header->space4,
168 printed_header->space5,
169 printed_header->space6,
170 printed_header->space7,
171 printed_header->header_id,
172 printed_header->header_version,
173 printed_header->space8,
174 printed_header->section_id,
175 printed_header->image_info_type,
176 printed_header->image_info_offset,
177 printed_header->family_member, printed_header->header_checksum);
180 void print_stag_header(struct stag_header *printed_header)
182 printf("\tcmark: 0x%02X\n"
185 "\ttime_stamp: 0x%08X\n"
186 "\timage_length: 0x%04X\n"
187 "\timage_checksum: 0x%04X\n"
188 "\ttag_checksum: 0x%04X\n",
189 printed_header->cmark,
191 printed_header->magic,
192 printed_header->time_stamp,
193 printed_header->image_length,
194 printed_header->image_checksum, printed_header->tag_checksum);
197 void print_sch2_header(struct sch2_header *printed_header)
199 printf("\tmagic: 0x%04X\n"
200 "\tcp_type: 0x%02X\n"
201 "\tversion: 0x%02X\n"
202 "\tram_addr: 0x%08X\n"
203 "\timage_len: 0x%08X\n"
204 "\timage_crc32: 0x%08X\n"
205 "\tstart_addr: 0x%08X\n"
206 "\trootfs_addr: 0x%08X\n"
207 "\trootfs_len: 0x%08X\n"
208 "\trootfs_crc32: 0x%08X\n"
209 "\theader_crc32: 0x%08X\n"
210 "\theader_length: 0x%04X\n"
211 "\tcmd_line_length: 0x%04X\n",
212 printed_header->magic,
213 printed_header->cp_type,
214 printed_header->version,
215 printed_header->ram_addr,
216 printed_header->image_len,
217 printed_header->image_crc32,
218 printed_header->start_addr,
219 printed_header->rootfs_addr,
220 printed_header->rootfs_len,
221 printed_header->rootfs_crc32,
222 printed_header->header_crc32,
223 printed_header->header_length, printed_header->cmd_line_length);
226 static int find_auh_headers(char *buf)
229 struct auh_header *tmp_header[MAX_HEADER_COUNTER];
230 int header_counter = 0;
232 int ret = EXIT_FAILURE;
234 while (tmp_buf - buf <= inspect_info.file_size - AUH_SIZE) {
235 if (!memcmp(tmp_buf, AUH_MAGIC, 3)) {
236 if (((struct auh_header *)tmp_buf)->header_checksum ==
237 (uint16_t) ~jboot_checksum(0, (uint16_t *) tmp_buf,
239 uint16_t checksum = 0;
240 printf("Find proper AUH header at: 0x%lX!\n",
242 tmp_header[header_counter] =
243 (struct auh_header *)tmp_buf;
245 jboot_checksum(0, (uint16_t *) ((char *)
250 [header_counter]->data_length);
251 if (tmp_header[header_counter]->image_checksum
253 printf("Image checksum ok.\n");
255 ERR("Image checksum incorrect! Stored: 0x%X Calculated: 0x%X\n", tmp_header[header_counter]->image_checksum, checksum);
257 if (header_counter > MAX_HEADER_COUNTER)
264 if (header_counter == 0)
265 ERR("Can't find proper AUH header!\n");
266 else if (header_counter > MAX_HEADER_COUNTER)
267 ERR("To many AUH headers!\n");
269 for (int i = 0; i < header_counter; i++) {
270 printf("AUH %d:\n", i);
271 print_auh_header(tmp_header[i]);
280 static int check_stag_header(char *buf, struct stag_header *header)
283 int ret = EXIT_FAILURE;
285 uint8_t cmark_tmp = header->cmark;
286 header->cmark = header->id;
288 if (header->tag_checksum ==
289 (uint16_t) ~jboot_checksum(0, (uint16_t *) header,
291 uint16_t checksum = 0;
292 printf("Find proper STAG header at: 0x%lX!\n",
293 (char *)header - buf);
295 jboot_checksum(0, (uint16_t *) ((char *)header + STAG_SIZE),
296 header->image_length);
297 if (header->image_checksum == checksum) {
298 printf("Image checksum ok.\n");
299 header->cmark = cmark_tmp;
300 print_stag_header(header);
303 ERR("Image checksum incorrect! Stored: 0x%X Calculated: 0x%X\n", header->image_checksum, checksum);
305 ERR("STAG header checksum incorrect!");
307 header->cmark = cmark_tmp;
311 static int check_sch2_header(char *buf, struct sch2_header *header)
314 int ret = EXIT_FAILURE;
316 uint32_t crc32_tmp = header->header_crc32;
317 header->header_crc32 = 0;
319 if (crc32_tmp == crc32(0, (uint8_t *) header, header->header_length)) {
321 printf("Find proper SCH2 header at: 0x%lX!\n",
322 (char *)header - buf);
325 crc32(0, (uint8_t *) header + header->header_length,
327 if (header->image_crc32 == crc32_val) {
328 printf("Kernel checksum ok.\n");
330 header->header_crc32 = crc32_tmp;
331 print_sch2_header(header);
334 ERR("Kernel checksum incorrect! Stored: 0x%X Calculated: 0x%X\n", header->image_crc32, crc32_val);
337 ERR("SCH2 header checksum incorrect!");
339 header->header_crc32 = crc32_tmp;
343 static int inspect_fw(void)
346 struct stag_header *stag_header_kernel;
347 struct sch2_header *sch2_header_kernel;
348 int ret = EXIT_FAILURE;
350 buf = malloc(inspect_info.file_size);
352 ERR("no memory for buffer!\n");
356 ret = read_to_buf(&inspect_info, buf);
360 ret = find_auh_headers(buf);
364 stag_header_kernel = (struct stag_header *)(buf + AUH_SIZE);
366 ret = check_stag_header(buf, stag_header_kernel);
370 sch2_header_kernel = (struct sch2_header *)(buf + AUH_SIZE + STAG_SIZE);
372 ret = check_sch2_header(buf, sch2_header_kernel);
382 static int check_options(void)
386 if (inspect_info.file_name) {
387 ret = get_file_stat(&inspect_info);
397 int fill_sch2(struct sch2_header *header, char *kernel_ptr, char *rootfs_ptr)
400 header->magic = SCH2_MAGIC;
401 header->cp_type = LZMA;
402 header->version = SCH2_VER;
403 header->ram_addr = RAM_LOAD_ADDR;
404 header->image_len = kernel_info.file_size;
405 header->image_crc32 = crc32(0, (uint8_t *) kernel_ptr, kernel_info.file_size);
406 header->start_addr = RAM_ENTRY_ADDR;
407 header->rootfs_addr =
408 JBOOT_SIZE + STAG_SIZE + SCH2_SIZE + kernel_info.file_size;
409 header->rootfs_len = rootfs_info.file_size;
410 header->rootfs_crc32 = crc32(0, (uint8_t *) rootfs_ptr, rootfs_info.file_size);
411 header->header_crc32 = 0;
412 header->header_length = SCH2_SIZE;
413 header->cmd_line_length = 0;
415 header->header_crc32 = crc32(0, (uint8_t *) header, header->header_length);
420 int fill_stag(struct stag_header *header, uint32_t length)
422 header->cmark = STAG_ID;
423 header->id = STAG_ID;
424 header->magic = STAG_MAGIC;
425 header->time_stamp = jboot_timestamp();
426 header->image_length = length + SCH2_SIZE;
427 header->image_checksum =
428 jboot_checksum(0, (uint16_t *) ((char *)header + STAG_SIZE),
429 header->image_length);
430 header->tag_checksum =
431 ~jboot_checksum(0, (uint16_t *) header, STAG_SIZE - 2);
433 if (image_type == FACTORY)
434 header->cmark = STAG_CMARK_FACTORY;
439 int fill_auh(struct auh_header *header, uint32_t length)
441 memcpy(header->rom_id, rom_id, 12);
443 header->image_checksum =
444 jboot_checksum(0, (uint16_t *) ((char *)header + AUH_SIZE), length);
448 header->lpvs = AUH_LVPS;
450 header->time_stamp = jboot_timestamp();
451 header->erase_start = JBOOT_SIZE;
452 header->erase_length = firmware_size;
453 header->data_offset = JBOOT_SIZE;
454 header->data_length = length;
459 header->header_id = AUH_HDR_ID;
460 header->header_version = AUH_HDR_VER;
462 header->section_id = AUH_SEC_ID;
463 header->image_info_type = AUH_INFO_TYPE;
464 header->image_info_offset = 0;
465 header->family_member = family_member;
466 header->header_checksum =
467 ~jboot_checksum(0, (uint16_t *) header, AUH_SIZE - 2);
477 int ret = EXIT_FAILURE;
480 struct stag_header *stag_header_kernel;
481 struct sch2_header *sch2_header_kernel;
483 if (!kernel_info.file_name | !rootfs_info.file_name)
486 ret = get_file_stat(&kernel_info);
489 ret = get_file_stat(&rootfs_info);
493 buf = malloc(firmware_size);
495 ERR("no memory for buffer\n");
499 if (rootfs_info.file_size + kernel_info.file_size + ALL_HEADERS_SIZE >
501 ERR("data is bigger than firmware_size!\n");
505 memset(buf, 0xff, firmware_size);
507 stag_header_kernel = (struct stag_header *)buf;
510 (struct sch2_header *)((char *)stag_header_kernel + STAG_SIZE);
511 kernel_ptr = (char *)sch2_header_kernel + SCH2_SIZE;
513 ret = read_to_buf(&kernel_info, kernel_ptr);
517 rootfs_ptr = kernel_ptr + kernel_info.file_size;
519 ret = read_to_buf(&rootfs_info, rootfs_ptr);
523 writelen = rootfs_ptr + rootfs_info.file_size - buf;
525 fill_sch2(sch2_header_kernel, kernel_ptr, rootfs_ptr);
526 fill_stag(stag_header_kernel, kernel_info.file_size);
528 ret = write_fw(ofname, buf, writelen);
544 int ret = EXIT_FAILURE;
547 struct auh_header *auh_header_kernel;
549 if (!image_info.file_name)
552 ret = get_file_stat(&image_info);
556 buf = malloc(firmware_size);
558 ERR("no memory for buffer\n");
562 if (image_info.file_size + AUH_SIZE >
564 ERR("data is bigger than firmware_size!\n");
567 if (!family_member) {
568 ERR("No family_member!\n");
575 memset(buf, 0xff, firmware_size);
577 image_ptr = (char *)(buf + AUH_SIZE);
579 ret = read_to_buf(&image_info, image_ptr);
583 writelen = image_ptr + image_info.file_size - buf;
585 auh_header_kernel = (struct auh_header *)buf;
586 fill_auh(auh_header_kernel, writelen - AUH_SIZE);
588 ret = write_fw(ofname, buf, writelen);
600 int main(int argc, char *argv[])
602 int ret = EXIT_FAILURE;
604 progname = basename(argv[0]);
605 image_type = SYSUPGRADE;
612 c = getopt(argc, argv, "f:F:i:hk:m:o:r:s:");
618 sscanf(optarg, "0x%hx", &family_member);
621 image_info.file_name = optarg;
622 image_type = FACTORY;
625 inspect_info.file_name = optarg;
628 kernel_info.file_name = optarg;
631 if (strlen(optarg) == 12)
632 memcpy(rom_id, optarg, 12);
635 rootfs_info.file_name = optarg;
641 sscanf(optarg, "0x%x", &firmware_size);
649 ret = check_options();
653 if (!inspect_info.file_name) {
654 if (image_type == FACTORY)