mirror of https://github.com/hak5/openwrt.git
firmware-utils: add otrx tool for handling TRX images
It can be a replacement for the trx tool. The advantage is that otrx doesn't alloc buffer for the whole TRX which can be a nice optimization when creating big images. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Acked-by: Hauke Mehrtens <hauke@hauke-m.de>openwrt-18.06
Rafał Miłecki
parent
36a92274a8
commit
fb66dc9b03
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@ -20,6 +20,7 @@ define Host/Compile
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$(call cc,addpattern)
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$(call cc,asustrx)
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$(call cc,trx)
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$(call cc,otrx)
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$(call cc,motorola-bin)
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$(call cc,dgfirmware)
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$(call cc,mksenaofw md5)
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@ -0,0 +1,592 @@
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/*
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* otrx
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*
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* Copyright (C) 2015-2017 Rafał Miłecki <zajec5@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <byteswap.h>
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#include <endian.h>
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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#if !defined(__BYTE_ORDER)
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#error "Unknown byte order"
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#endif
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define cpu_to_le32(x) bswap_32(x)
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#define le32_to_cpu(x) bswap_32(x)
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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#define cpu_to_le32(x) (x)
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#define le32_to_cpu(x) (x)
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#else
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#error "Unsupported endianness"
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#endif
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#define TRX_MAGIC 0x30524448
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#define TRX_FLAGS_OFFSET 12
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#define TRX_MAX_PARTS 3
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struct trx_header {
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uint32_t magic;
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uint32_t length;
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uint32_t crc32;
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uint16_t flags;
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uint16_t version;
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uint32_t offset[3];
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};
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char *trx_path;
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size_t trx_offset = 0;
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char *partition[TRX_MAX_PARTS] = {};
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static inline size_t otrx_min(size_t x, size_t y) {
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return x < y ? x : y;
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}
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/**************************************************
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* CRC32
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**************************************************/
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static const uint32_t crc32_tbl[] = {
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0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
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0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
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0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
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0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
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0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
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0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
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0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
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0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
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0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
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0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
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0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
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0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
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0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
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0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
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0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
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0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
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0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
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0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
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0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
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0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
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0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
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0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
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0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
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0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
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0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
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0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
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0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
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0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
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0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
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0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
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0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
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0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
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0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
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0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
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0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
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0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
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0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
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0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
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0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
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0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
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0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
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0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
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0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
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0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
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0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
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0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
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0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
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0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
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0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
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0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
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0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
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0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
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0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
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0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
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0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
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0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
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0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
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0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
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0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
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0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
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0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
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0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
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0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
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0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
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};
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uint32_t otrx_crc32(uint32_t crc, uint8_t *buf, size_t len) {
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while (len) {
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crc = crc32_tbl[(crc ^ *buf) & 0xff] ^ (crc >> 8);
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buf++;
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len--;
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}
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return crc;
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}
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/**************************************************
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* Check
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**************************************************/
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static void otrx_check_parse_options(int argc, char **argv) {
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int c;
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while ((c = getopt(argc, argv, "o:")) != -1) {
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switch (c) {
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case 'o':
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trx_offset = atoi(optarg);
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break;
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}
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}
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}
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static int otrx_check(int argc, char **argv) {
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FILE *trx;
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struct trx_header hdr;
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size_t bytes, length;
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uint8_t buf[1024];
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uint32_t crc32;
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int err = 0;
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if (argc < 3) {
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fprintf(stderr, "No TRX file passed\n");
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err = -EINVAL;
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goto out;
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}
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trx_path = argv[2];
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optind = 3;
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otrx_check_parse_options(argc, argv);
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trx = fopen(trx_path, "r");
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if (!trx) {
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fprintf(stderr, "Couldn't open %s\n", trx_path);
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err = -EACCES;
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goto out;
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}
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fseek(trx, trx_offset, SEEK_SET);
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bytes = fread(&hdr, 1, sizeof(hdr), trx);
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if (bytes != sizeof(hdr)) {
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fprintf(stderr, "Couldn't read %s header\n", trx_path);
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err = -EIO;
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goto err_close;
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}
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if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
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fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
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err = -EINVAL;
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goto err_close;
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}
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length = le32_to_cpu(hdr.length);
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if (length < sizeof(hdr)) {
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fprintf(stderr, "Length read from TRX too low (%zu B)\n", length);
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err = -EINVAL;
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goto err_close;
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}
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crc32 = 0xffffffff;
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fseek(trx, trx_offset + TRX_FLAGS_OFFSET, SEEK_SET);
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length -= TRX_FLAGS_OFFSET;
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while ((bytes = fread(buf, 1, otrx_min(sizeof(buf), length), trx)) > 0) {
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crc32 = otrx_crc32(crc32, buf, bytes);
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length -= bytes;
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}
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if (length) {
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fprintf(stderr, "Couldn't read last %zd B of data from %s\n", length, trx_path);
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err = -EIO;
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goto err_close;
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}
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if (crc32 != le32_to_cpu(hdr.crc32)) {
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fprintf(stderr, "Invalid data crc32: 0x%08x instead of 0x%08x\n", crc32, le32_to_cpu(hdr.crc32));
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err = -EINVAL;
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goto err_close;
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}
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printf("Found a valid TRX version %d\n", le32_to_cpu(hdr.version));
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err_close:
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fclose(trx);
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out:
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return err;
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}
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/**************************************************
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* Create
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**************************************************/
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static ssize_t otrx_create_append_file(FILE *trx, const char *in_path) {
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FILE *in;
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size_t bytes;
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ssize_t length = 0;
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uint8_t buf[1024];
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in = fopen(in_path, "r");
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if (!in) {
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fprintf(stderr, "Couldn't open %s\n", in_path);
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return -EACCES;
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}
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while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) {
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if (fwrite(buf, 1, bytes, trx) != bytes) {
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fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, trx_path);
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length = -EIO;
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break;
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}
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length += bytes;
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}
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fclose(in);
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return length;
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}
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static ssize_t otrx_create_append_zeros(FILE *trx, size_t length) {
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uint8_t *buf;
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buf = malloc(length);
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if (!buf)
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return -ENOMEM;
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memset(buf, 0, length);
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if (fwrite(buf, 1, length, trx) != length) {
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fprintf(stderr, "Couldn't write %zu B to %s\n", length, trx_path);
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free(buf);
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return -EIO;
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}
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free(buf);
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return length;
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}
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static ssize_t otrx_create_align(FILE *trx, size_t curr_offset, size_t alignment) {
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if (curr_offset & (alignment - 1)) {
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size_t length = alignment - (curr_offset % alignment);
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return otrx_create_append_zeros(trx, length);
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}
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return 0;
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}
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static int otrx_create_write_hdr(FILE *trx, struct trx_header *hdr) {
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size_t bytes, length;
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uint8_t buf[1024];
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uint32_t crc32;
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hdr->magic = cpu_to_le32(TRX_MAGIC);
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hdr->version = 1;
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fseek(trx, 0, SEEK_SET);
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bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
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if (bytes != sizeof(struct trx_header)) {
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fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
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return -EIO;
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}
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length = le32_to_cpu(hdr->length);
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crc32 = 0xffffffff;
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fseek(trx, TRX_FLAGS_OFFSET, SEEK_SET);
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length -= TRX_FLAGS_OFFSET;
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while ((bytes = fread(buf, 1, otrx_min(sizeof(buf), length), trx)) > 0) {
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crc32 = otrx_crc32(crc32, buf, bytes);
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length -= bytes;
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}
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hdr->crc32 = cpu_to_le32(crc32);
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fseek(trx, 0, SEEK_SET);
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bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
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if (bytes != sizeof(struct trx_header)) {
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fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
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return -EIO;
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}
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return 0;
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}
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static int otrx_create(int argc, char **argv) {
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FILE *trx;
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struct trx_header hdr = {};
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ssize_t sbytes;
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size_t curr_idx = 0;
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size_t curr_offset = sizeof(hdr);
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int c;
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int err = 0;
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if (argc < 3) {
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fprintf(stderr, "No TRX file passed\n");
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err = -EINVAL;
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goto out;
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}
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trx_path = argv[2];
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trx = fopen(trx_path, "w+");
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if (!trx) {
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fprintf(stderr, "Couldn't open %s\n", trx_path);
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err = -EACCES;
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goto out;
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}
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fseek(trx, curr_offset, SEEK_SET);
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optind = 3;
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while ((c = getopt(argc, argv, "f:A:a:b:")) != -1) {
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switch (c) {
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case 'f':
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if (curr_idx >= TRX_MAX_PARTS) {
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err = -ENOSPC;
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fprintf(stderr, "Reached TRX partitions limit, no place for %s\n", optarg);
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goto err_close;
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}
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sbytes = otrx_create_append_file(trx, optarg);
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if (sbytes < 0) {
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fprintf(stderr, "Failed to append file %s\n", optarg);
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} else {
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hdr.offset[curr_idx++] = curr_offset;
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curr_offset += sbytes;
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}
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sbytes = otrx_create_align(trx, curr_offset, 4);
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if (sbytes < 0)
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fprintf(stderr, "Failed to append zeros\n");
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else
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curr_offset += sbytes;
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break;
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case 'A':
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sbytes = otrx_create_append_file(trx, optarg);
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if (sbytes < 0) {
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fprintf(stderr, "Failed to append file %s\n", optarg);
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} else {
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curr_offset += sbytes;
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}
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sbytes = otrx_create_align(trx, curr_offset, 4);
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if (sbytes < 0)
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fprintf(stderr, "Failed to append zeros\n");
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else
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curr_offset += sbytes;
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break;
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case 'a':
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sbytes = otrx_create_align(trx, curr_offset, strtol(optarg, NULL, 0));
|
||||
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;
|
||||
}
|
||||
|
||||
sbytes = otrx_create_align(trx, curr_offset, 0x1000);
|
||||
if (sbytes < 0)
|
||||
fprintf(stderr, "Failed to append zeros\n");
|
||||
else
|
||||
curr_offset += sbytes;
|
||||
|
||||
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-A file\t\t\t\t[partition] append current partition with content copied from file\n");
|
||||
printf("\t-a alignment\t\t\t[partition] align current partition\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;
|
||||
}
|
||||
Loading…
Reference in New Issue