ubsha1.c
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/*
* (C) Copyright 2007
* Heiko Schocher, DENX Software Engineering, <hs@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include "os_support.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <u-boot/sha1.h>
int main (int argc, char **argv)
{
unsigned char output[20];
int i, len;
char *imagefile;
char *cmdname = *argv;
unsigned char *ptr;
unsigned char *data;
struct stat sbuf;
unsigned char *ptroff;
int ifd;
int off;
if (argc > 1) {
imagefile = argv[1];
ifd = open (imagefile, O_RDWR|O_BINARY);
if (ifd < 0) {
fprintf (stderr, "%s: Can't open %s: %s\n",
cmdname, imagefile, strerror(errno));
exit (EXIT_FAILURE);
}
if (fstat (ifd, &sbuf) < 0) {
fprintf (stderr, "%s: Can't stat %s: %s\n",
cmdname, imagefile, strerror(errno));
exit (EXIT_FAILURE);
}
len = sbuf.st_size;
ptr = (unsigned char *)mmap(0, len,
PROT_READ, MAP_SHARED, ifd, 0);
if (ptr == (unsigned char *)MAP_FAILED) {
fprintf (stderr, "%s: Can't read %s: %s\n",
cmdname, imagefile, strerror(errno));
exit (EXIT_FAILURE);
}
/* create a copy, so we can blank out the sha1 sum */
data = malloc (len);
memcpy (data, ptr, len);
off = SHA1_SUM_POS;
ptroff = &data[len + off];
for (i = 0; i < SHA1_SUM_LEN; i++) {
ptroff[i] = 0;
}
sha1_csum ((unsigned char *) data, len, (unsigned char *)output);
printf ("U-Boot sum:\n");
for (i = 0; i < 20 ; i++) {
printf ("%02X ", output[i]);
}
printf ("\n");
/* overwrite the sum in the bin file, with the actual */
lseek (ifd, SHA1_SUM_POS, SEEK_END);
if (write (ifd, output, SHA1_SUM_LEN) != SHA1_SUM_LEN) {
fprintf (stderr, "%s: Can't write %s: %s\n",
cmdname, imagefile, strerror(errno));
exit (EXIT_FAILURE);
}
free (data);
(void) munmap((void *)ptr, len);
(void) close (ifd);
}
return EXIT_SUCCESS;
}