LXR uboot/tools/ubsha1.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2007
   4 * Heiko Schocher, DENX Software Engineering, <hs@denx.de>
   5 */
   6
   7#include "os_support.h"
   8#include <stdio.h>
   9#include <stdlib.h>
  10#include <unistd.h>
  11#include <fcntl.h>
  12#include <errno.h>
  13#include <string.h>
  14#include <sys/stat.h>
  15#include <u-boot/sha1.h>
  16
  17int main (int argc, char **argv)
  18{
  19        unsigned char output[20];
  20        int i, len;
  21
  22        char    *imagefile;
  23        char    *cmdname = *argv;
  24        unsigned char   *ptr;
  25        unsigned char   *data;
  26        struct stat sbuf;
  27        unsigned char   *ptroff;
  28        int     ifd;
  29        int     off;
  30
  31        if (argc > 1) {
  32                imagefile = argv[1];
  33                ifd = open (imagefile, O_RDWR|O_BINARY);
  34                if (ifd < 0) {
  35                        fprintf (stderr, "%s: Can't open %s: %s\n",
  36                                cmdname, imagefile, strerror(errno));
  37                        exit (EXIT_FAILURE);
  38                }
  39                if (fstat (ifd, &sbuf) < 0) {
  40                        fprintf (stderr, "%s: Can't stat %s: %s\n",
  41                                cmdname, imagefile, strerror(errno));
  42                        exit (EXIT_FAILURE);
  43                }
  44                len = sbuf.st_size;
  45                ptr = (unsigned char *)mmap(0, len,
  46                                    PROT_READ, MAP_SHARED, ifd, 0);
  47                if (ptr == (unsigned char *)MAP_FAILED) {
  48                        fprintf (stderr, "%s: Can't read %s: %s\n",
  49                                cmdname, imagefile, strerror(errno));
  50                        exit (EXIT_FAILURE);
  51                }
  52
  53                /* create a copy, so we can blank out the sha1 sum */
  54                data = malloc (len);
  55                memcpy (data, ptr, len);
  56                off = SHA1_SUM_POS;
  57                ptroff = &data[len +  off];
  58                for (i = 0; i < SHA1_SUM_LEN; i++) {
  59                        ptroff[i] = 0;
  60                }
  61
  62                sha1_csum ((unsigned char *) data, len, (unsigned char *)output);
  63
  64                printf ("U-Boot sum:\n");
  65                for (i = 0; i < 20 ; i++) {
  66                    printf ("%02X ", output[i]);
  67                }
  68                printf ("\n");
  69                /* overwrite the sum in the bin file, with the actual */
  70                lseek (ifd, SHA1_SUM_POS, SEEK_END);
  71                if (write (ifd, output, SHA1_SUM_LEN) != SHA1_SUM_LEN) {
  72                        fprintf (stderr, "%s: Can't write %s: %s\n",
  73                                cmdname, imagefile, strerror(errno));
  74                        exit (EXIT_FAILURE);
  75                }
  76
  77                free (data);
  78                (void) munmap((void *)ptr, len);
  79                (void) close (ifd);
  80        }
  81
  82        return EXIT_SUCCESS;
  83}
  84