+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-#include <unistd.h>
-#include <libgen.h>
-#include <getopt.h>
-#include <stdarg.h>
-#include <errno.h>
-#include <sys/stat.h>
-
-#include "md5.h"
-
-#define ERR(fmt, ...) do { \
- fflush(0); \
- fprintf(stderr, "[%s] *** error: " fmt "\n", \
- progname, ## __VA_ARGS__ ); \
-} while (0)
-
-#define ERRS(fmt, ...) do { \
- int save = errno; \
- fflush(0); \
- fprintf(stderr, "[%s] *** error: " fmt ", %s\n", \
- progname, ## __VA_ARGS__, strerror(save)); \
-} while (0)
-
-#define WRG_MAGIC 0x20040220
-
-struct wrg_header {
- char signature[32];
- uint32_t magic1;
- uint32_t magic2;
- uint32_t size;
- uint32_t offset;
- char devname[32];
- char digest[16];
-} __attribute__ ((packed));
-
-static char *progname;
-static char *ifname;
-static char *ofname;
-static char *signature;
-static char *dev_name;
-static uint32_t offset;
-static int big_endian;
-
-void usage(int status)
-{
- FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
-
- fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
- fprintf(stream,
-"\n"
-"Options:\n"
-" -b create image in big endian format\n"
-" -i <file> read input from the file <file>\n"
-" -d <name> set device name to <name>\n"
-" -o <file> write output to the file <file>\n"
-" -O <offset> set offset to <offset>\n"
-" -s <sig> set image signature to <sig>\n"
-" -h show this screen\n"
- );
-
- exit(status);
-}
-
-static void put_u32(void *data, uint32_t val)
-{
- unsigned char *p = data;
-
- if (big_endian) {
- p[0] = (val >> 24) & 0xff;
- p[1] = (val >> 16) & 0xff;
- p[2] = (val >> 8) & 0xff;
- p[3] = val & 0xff;
- } else {
- p[3] = (val >> 24) & 0xff;
- p[2] = (val >> 16) & 0xff;
- p[1] = (val >> 8) & 0xff;
- p[0] = val & 0xff;
- }
-}
-
-static void get_digest(struct wrg_header *header, char *data, int size)
-{
- MD5_CTX ctx;
-
- MD5_Init(&ctx);
-
- MD5_Update(&ctx, (char *)&header->offset, sizeof(header->offset));
- MD5_Update(&ctx, (char *)&header->devname, sizeof(header->devname));
- MD5_Update(&ctx, data, size);
-
- MD5_Final((unsigned char *)header->digest, &ctx);
-}
-
-int main(int argc, char *argv[])
-{
- struct wrg_header *header;
- char *buf;
- struct stat st;
- int buflen;
- int err;
- int res = EXIT_FAILURE;
-
- FILE *outfile, *infile;
-
- progname = basename(argv[0]);
-
- while ( 1 ) {
- int c;
-
- c = getopt(argc, argv, "bd:i:o:s:O:h");
- if (c == -1)
- break;
-
- switch (c) {
- case 'b':
- big_endian = 1;
- break;
- case 'd':
- dev_name = optarg;
- break;
- case 'i':
- ifname = optarg;
- break;
- case 'o':
- ofname = optarg;
- break;
- case 's':
- signature = optarg;
- break;
- case 'O':
- offset = strtoul(optarg, NULL, 0);
- break;
- case 'h':
- usage(EXIT_SUCCESS);
- break;
-
- default:
- usage(EXIT_FAILURE);
- break;
- }
- }
-
- if (signature == NULL) {
- ERR("no signature specified");
- goto err;
- }
-
- if (ifname == NULL) {
- ERR("no input file specified");
- goto err;
- }
-
- if (ofname == NULL) {
- ERR("no output file specified");
- goto err;
- }
-
- if (dev_name == NULL) {
- ERR("no device name specified");
- goto err;
- }
-
- err = stat(ifname, &st);
- if (err){
- ERRS("stat failed on %s", ifname);
- goto err;
- }
-
- buflen = st.st_size + sizeof(struct wrg_header);
- buf = malloc(buflen);
- if (!buf) {
- ERR("no memory for buffer\n");
- goto err;
- }
-
- infile = fopen(ifname, "r");
- if (infile == NULL) {
- ERRS("could not open \"%s\" for reading", ifname);
- goto err_free;
- }
-
- errno = 0;
- fread(buf + sizeof(struct wrg_header), st.st_size, 1, infile);
- if (errno != 0) {
- ERRS("unable to read from file %s", ifname);
- goto close_in;
- }
-
- header = (struct wrg_header *) buf;
- memset(header, '\0', sizeof(struct wrg_header));
-
- strncpy(header->signature, signature, sizeof(header->signature));
- strncpy(header->devname, dev_name, sizeof(header->signature));
- put_u32(&header->magic1, WRG_MAGIC);
- put_u32(&header->magic2, WRG_MAGIC);
- put_u32(&header->size, st.st_size);
- put_u32(&header->offset, offset);
-
- get_digest(header, buf + sizeof(struct wrg_header), st.st_size);
-
- outfile = fopen(ofname, "w");
- if (outfile == NULL) {
- ERRS("could not open \"%s\" for writing", ofname);
- goto close_in;
- }
-
- errno = 0;
- fwrite(buf, buflen, 1, outfile);
- if (errno) {
- ERRS("unable to write to file %s", ofname);
- goto close_out;
- }
-
- fflush(outfile);
-
- res = EXIT_SUCCESS;
-
-close_out:
- fclose(outfile);
- if (res != EXIT_SUCCESS)
- unlink(ofname);
-close_in:
- fclose(infile);
-err_free:
- free(buf);
-err:
- return res;
-}
projects / openwrt / openwrt.git / blobdiff