| 1 | /* |
| 2 | * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 as published |
| 6 | * by the Free Software Foundation. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <stdint.h> |
| 13 | #include <string.h> |
| 14 | #include <unistd.h> /* for unlink() */ |
| 15 | #include <libgen.h> |
| 16 | #include <getopt.h> /* for getopt() */ |
| 17 | #include <stdarg.h> |
| 18 | #include <errno.h> |
| 19 | #include <sys/stat.h> |
| 20 | |
| 21 | #include "sha1.h" |
| 22 | |
| 23 | #if (__BYTE_ORDER == __BIG_ENDIAN) |
| 24 | # define HOST_TO_BE32(x) (x) |
| 25 | # define BE32_TO_HOST(x) (x) |
| 26 | #else |
| 27 | # define HOST_TO_BE32(x) bswap_32(x) |
| 28 | # define BE32_TO_HOST(x) bswap_32(x) |
| 29 | #endif |
| 30 | |
| 31 | |
| 32 | struct planex_hdr { |
| 33 | uint8_t sha1sum[20]; |
| 34 | char version[8]; |
| 35 | uint8_t unk1[2]; |
| 36 | uint32_t datalen; |
| 37 | } __attribute__ ((packed)); |
| 38 | |
| 39 | struct board_info { |
| 40 | char *id; |
| 41 | uint32_t seed; |
| 42 | uint8_t unk[2]; |
| 43 | uint32_t datalen; |
| 44 | }; |
| 45 | |
| 46 | /* |
| 47 | * Globals |
| 48 | */ |
| 49 | static char *ifname; |
| 50 | static char *progname; |
| 51 | static char *ofname; |
| 52 | static char *version = "1.00.00"; |
| 53 | |
| 54 | static char *board_id; |
| 55 | static struct board_info *board; |
| 56 | |
| 57 | static struct board_info boards[] = { |
| 58 | { |
| 59 | .id = "MZK-W04NU", |
| 60 | .seed = 2, |
| 61 | .unk = {0x04, 0x08}, |
| 62 | .datalen = 0x770000, |
| 63 | }, { |
| 64 | .id = "MZK-W300NH", |
| 65 | .seed = 4, |
| 66 | .unk = {0x00, 0x00}, |
| 67 | .datalen = 0x770000, |
| 68 | }, { |
| 69 | /* terminating entry */ |
| 70 | } |
| 71 | }; |
| 72 | |
| 73 | /* |
| 74 | * Message macros |
| 75 | */ |
| 76 | #define ERR(fmt, ...) do { \ |
| 77 | fflush(0); \ |
| 78 | fprintf(stderr, "[%s] *** error: " fmt "\n", \ |
| 79 | progname, ## __VA_ARGS__ ); \ |
| 80 | } while (0) |
| 81 | |
| 82 | #define ERRS(fmt, ...) do { \ |
| 83 | int save = errno; \ |
| 84 | fflush(0); \ |
| 85 | fprintf(stderr, "[%s] *** error: " fmt "\n", \ |
| 86 | progname, ## __VA_ARGS__, strerror(save)); \ |
| 87 | } while (0) |
| 88 | |
| 89 | static struct board_info *find_board(char *id) |
| 90 | { |
| 91 | struct board_info *ret; |
| 92 | struct board_info *board; |
| 93 | |
| 94 | ret = NULL; |
| 95 | for (board = boards; board->id != NULL; board++){ |
| 96 | if (strcasecmp(id, board->id) == 0) { |
| 97 | ret = board; |
| 98 | break; |
| 99 | } |
| 100 | }; |
| 101 | |
| 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | void usage(int status) |
| 106 | { |
| 107 | FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout; |
| 108 | struct board_info *board; |
| 109 | |
| 110 | fprintf(stream, "Usage: %s [OPTIONS...]\n", progname); |
| 111 | fprintf(stream, |
| 112 | "\n" |
| 113 | "Options:\n" |
| 114 | " -B <board> create image for the board specified with <board>\n" |
| 115 | " -i <file> read input from the file <file>\n" |
| 116 | " -o <file> write output to the file <file>\n" |
| 117 | " -v <version> set image version to <version>\n" |
| 118 | " -h show this screen\n" |
| 119 | ); |
| 120 | |
| 121 | exit(status); |
| 122 | } |
| 123 | |
| 124 | int main(int argc, char *argv[]) |
| 125 | { |
| 126 | int res = EXIT_FAILURE; |
| 127 | int buflen; |
| 128 | int err; |
| 129 | struct stat st; |
| 130 | char *buf; |
| 131 | struct planex_hdr *hdr; |
| 132 | sha1_context ctx; |
| 133 | uint32_t seed; |
| 134 | |
| 135 | FILE *outfile, *infile; |
| 136 | |
| 137 | progname = basename(argv[0]); |
| 138 | |
| 139 | while ( 1 ) { |
| 140 | int c; |
| 141 | |
| 142 | c = getopt(argc, argv, "B:i:o:v:h"); |
| 143 | if (c == -1) |
| 144 | break; |
| 145 | |
| 146 | switch (c) { |
| 147 | case 'B': |
| 148 | board_id = optarg; |
| 149 | break; |
| 150 | case 'i': |
| 151 | ifname = optarg; |
| 152 | break; |
| 153 | case 'o': |
| 154 | ofname = optarg; |
| 155 | break; |
| 156 | case 'v': |
| 157 | version = optarg; |
| 158 | break; |
| 159 | case 'h': |
| 160 | usage(EXIT_SUCCESS); |
| 161 | break; |
| 162 | default: |
| 163 | usage(EXIT_FAILURE); |
| 164 | break; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | if (board_id == NULL) { |
| 169 | ERR("no board specified"); |
| 170 | goto err; |
| 171 | } |
| 172 | |
| 173 | board = find_board(board_id); |
| 174 | if (board == NULL) { |
| 175 | ERR("unknown board '%s'", board_id); |
| 176 | goto err; |
| 177 | }; |
| 178 | |
| 179 | if (ifname == NULL) { |
| 180 | ERR("no input file specified"); |
| 181 | goto err; |
| 182 | } |
| 183 | |
| 184 | if (ofname == NULL) { |
| 185 | ERR("no output file specified"); |
| 186 | goto err; |
| 187 | } |
| 188 | |
| 189 | err = stat(ifname, &st); |
| 190 | if (err){ |
| 191 | ERRS("stat failed on %s", ifname); |
| 192 | goto err; |
| 193 | } |
| 194 | |
| 195 | if (st.st_size > board->datalen) { |
| 196 | ERR("file '%s' is too big - max size: 0x%08X (exceeds %lu bytes)\n", |
| 197 | ifname, board->datalen, st.st_size - board->datalen); |
| 198 | goto err; |
| 199 | } |
| 200 | |
| 201 | buflen = board->datalen + 0x10000; |
| 202 | buf = malloc(buflen); |
| 203 | if (!buf) { |
| 204 | ERR("no memory for buffer\n"); |
| 205 | goto err; |
| 206 | } |
| 207 | |
| 208 | memset(buf, 0xff, buflen); |
| 209 | hdr = (struct planex_hdr *)buf; |
| 210 | |
| 211 | hdr->datalen = HOST_TO_BE32(board->datalen); |
| 212 | hdr->unk1[0] = board->unk[0]; |
| 213 | hdr->unk1[1] = board->unk[1]; |
| 214 | |
| 215 | snprintf(hdr->version, sizeof(hdr->version), "%s", version); |
| 216 | |
| 217 | infile = fopen(ifname, "r"); |
| 218 | if (infile == NULL) { |
| 219 | ERRS("could not open \"%s\" for reading", ifname); |
| 220 | goto err_free; |
| 221 | } |
| 222 | |
| 223 | errno = 0; |
| 224 | fread(buf + sizeof(*hdr), st.st_size, 1, infile); |
| 225 | if (errno != 0) { |
| 226 | ERRS("unable to read from file %s", ifname); |
| 227 | goto err_close_in; |
| 228 | } |
| 229 | |
| 230 | seed = HOST_TO_BE32(board->seed); |
| 231 | sha1_starts(&ctx); |
| 232 | sha1_update(&ctx, (uchar *) &seed, sizeof(seed)); |
| 233 | sha1_update(&ctx, buf + sizeof(*hdr), board->datalen); |
| 234 | sha1_finish(&ctx, hdr->sha1sum); |
| 235 | |
| 236 | outfile = fopen(ofname, "w"); |
| 237 | if (outfile == NULL) { |
| 238 | ERRS("could not open \"%s\" for writing", ofname); |
| 239 | goto err_close_in; |
| 240 | } |
| 241 | |
| 242 | errno = 0; |
| 243 | fwrite(buf, buflen, 1, outfile); |
| 244 | if (errno) { |
| 245 | ERRS("unable to write to file %s", ofname); |
| 246 | goto err_close_out; |
| 247 | } |
| 248 | |
| 249 | res = EXIT_SUCCESS; |
| 250 | |
| 251 | out_flush: |
| 252 | fflush(outfile); |
| 253 | |
| 254 | err_close_out: |
| 255 | fclose(outfile); |
| 256 | if (res != EXIT_SUCCESS) { |
| 257 | unlink(ofname); |
| 258 | } |
| 259 | |
| 260 | err_close_in: |
| 261 | fclose(infile); |
| 262 | |
| 263 | err_free: |
| 264 | free(buf); |
| 265 | |
| 266 | err: |
| 267 | return res; |
| 268 | } |
| 269 | |
| 270 | |
