diff options
Diffstat (limited to 'package/utils/otrx/src/otrx.c')
| -rw-r--r-- | package/utils/otrx/src/otrx.c | 577 |
1 files changed, 577 insertions, 0 deletions
diff --git a/package/utils/otrx/src/otrx.c b/package/utils/otrx/src/otrx.c new file mode 100644 index 0000000..101a310 --- /dev/null +++ b/package/utils/otrx/src/otrx.c @@ -0,0 +1,577 @@ +/* + * 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(uint8_t *buf, size_t len) { + uint32_t crc = 0xffffffff; + + 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 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_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) { + for (i = 0; i < bytes; i++) + crc32 = crc32_tbl[(crc32 ^ buf[i]) & 0xff] ^ (crc32 >> 8); + 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(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; +} |