/* * asustrx * * Copyright (C) 2015 Rafał Miłecki * * 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 #include #include #include #include #include #include #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 struct trx_header { uint32_t magic; uint32_t length; uint32_t crc32; uint16_t flags; uint16_t version; uint32_t offset[3]; }; struct asustrx_tail { uint8_t version[4]; char productid[12]; uint8_t unused[48]; }; char *in_path = NULL; char *out_path = NULL; char *productid = NULL; uint8_t version[4] = { }; 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, }; static void parse_options(int argc, char **argv) { int c; while ((c = getopt(argc, argv, "i:o:p:v:")) != -1) { switch (c) { case 'i': in_path = optarg; break; case 'o': out_path = optarg; break; case 'p': productid = optarg; break; case 'v': if (sscanf(optarg, "%hu.%hu.%hu.%hu", &version[0], &version[1], &version[2], &version[3]) != 4) fprintf(stderr, "Version %s doesn't match suppored 4-digits format\n", optarg); break; } } } static void usage() { printf("Usage:\n"); printf("\t-i file\t\t\t\tinput TRX file\n"); printf("\t-o file\t\t\t\toutput Asus TRX file\n"); printf("\t-p productid\t\t\tproduct (device) ID\n"); printf("\t-v version\t\t\tfirmware version formatted with 4 digits like: 1.2.3.4\n"); } int main(int argc, char **argv) { struct trx_header hdr; struct asustrx_tail tail = { }; FILE *in, *out; uint8_t buf[1024]; size_t bytes; size_t length = 0; uint32_t crc32 = 0xffffffff; int i; int err = 0; /* Parse & validate arguments */ parse_options(argc, argv); if (!in_path || !out_path || !productid) { usage(); err = -EINVAL; goto err; } /* Fill Asus tail */ tail.version[0] = version[0]; tail.version[1] = version[1]; tail.version[2] = version[2]; tail.version[3] = version[3]; strncpy(tail.productid, productid, sizeof(tail.productid)); /* Open files */ in = fopen(in_path, "r"); if (!in) { fprintf(stderr, "Couldn't open %s\n", in_path); err = -EIO; goto err; } out = fopen(out_path, "w+"); if (!out) { fprintf(stderr, "Couldn't open %s\n", out_path); err = -EIO; goto err; } /* Check is there is empty place for Asus tail */ bytes = sizeof(struct asustrx_tail); fseek(in, -bytes, SEEK_END); if (fread(buf, 1, bytes, in) != bytes) { fprintf(stderr, "Couldn't read %zu B from %s\n", bytes, in_path); err = -EIO; goto err; } for (i = 0; i < bytes; i++) { if (buf[i]) { fprintf(stderr, "Input TRX doesn't have last 64 B empty %s\n", out_path); err = -ENOSPC; goto err; } } /* Copy whole TRX */ rewind(in); while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) { if (fwrite(buf, 1, bytes, out) != bytes) { fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, out_path); err = -EIO; goto err; } } /* Overwrite last 64 B with Asus tail */ bytes = sizeof(tail); fseek(out, -bytes, SEEK_CUR); if (fwrite(&tail, 1, bytes, out) != bytes) { fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, out_path); err = -EIO; goto err; } /* Calculate crc32 */ fseek(out, TRX_FLAGS_OFFSET, SEEK_SET); length = TRX_FLAGS_OFFSET; while ((bytes = fread(buf, 1, sizeof(buf), out )) > 0) { length += bytes; for (i = 0; i < bytes; i++) crc32 = crc32_tbl[(crc32 ^ buf[i]) & 0xff] ^ (crc32 >> 8); } /* Update header */ bytes = sizeof(hdr); rewind(out); if (fread(&hdr, 1, sizeof(hdr), out) != bytes) { fprintf(stderr, "Couldn't read %zu B from %s\n", bytes, in_path); err = -EIO; goto err; } hdr.crc32 = cpu_to_le32(crc32); rewind(out); if (fwrite(&hdr, 1, bytes, out) != bytes) { fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, out_path); err = -EIO; goto err; } err: if (out) fclose(out); if (in) fclose(in); return err; } 04'>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