LXR uboot/tools/ubsha1.c

   1/*
   2 * (C) Copyright 2007
   3 * Heiko Schocher, DENX Software Engineering, <hs@denx.de>
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include "os_support.h"
  25#include <stdio.h>
  26#include <stdlib.h>
  27#include <unistd.h>
  28#include <fcntl.h>
  29#include <errno.h>
  30#include <string.h>
  31#include <sys/stat.h>
  32#include "sha1.h"
  33
  34int main (int argc, char **argv)
  35{
  36        unsigned char output[20];
  37        int i, len;
  38
  39        char    *imagefile;
  40        char    *cmdname = *argv;
  41        unsigned char   *ptr;
  42        unsigned char   *data;
  43        struct stat sbuf;
  44        unsigned char   *ptroff;
  45        int     ifd;
  46        int     off;
  47
  48        if (argc > 1) {
  49                imagefile = argv[1];
  50                ifd = open (imagefile, O_RDWR|O_BINARY);
  51                if (ifd < 0) {
  52                        fprintf (stderr, "%s: Can't open %s: %s\n",
  53                                cmdname, imagefile, strerror(errno));
  54                        exit (EXIT_FAILURE);
  55                }
  56                if (fstat (ifd, &sbuf) < 0) {
  57                        fprintf (stderr, "%s: Can't stat %s: %s\n",
  58                                cmdname, imagefile, strerror(errno));
  59                        exit (EXIT_FAILURE);
  60                }
  61                len = sbuf.st_size;
  62                ptr = (unsigned char *)mmap(0, len,
  63                                    PROT_READ, MAP_SHARED, ifd, 0);
  64                if (ptr == (unsigned char *)MAP_FAILED) {
  65                        fprintf (stderr, "%s: Can't read %s: %s\n",
  66                                cmdname, imagefile, strerror(errno));
  67                        exit (EXIT_FAILURE);
  68                }
  69
  70                /* create a copy, so we can blank out the sha1 sum */
  71                data = malloc (len);
  72                memcpy (data, ptr, len);
  73                off = SHA1_SUM_POS;
  74                ptroff = &data[len +  off];
  75                for (i = 0; i < SHA1_SUM_LEN; i++) {
  76                        ptroff[i] = 0;
  77                }
  78
  79                sha1_csum ((unsigned char *) data, len, (unsigned char *)output);
  80
  81                printf ("U-Boot sum:\n");
  82                for (i = 0; i < 20 ; i++) {
  83                    printf ("%02X ", output[i]);
  84                }
  85                printf ("\n");
  86                /* overwrite the sum in the bin file, with the actual */
  87                lseek (ifd, SHA1_SUM_POS, SEEK_END);
  88                if (write (ifd, output, SHA1_SUM_LEN) != SHA1_SUM_LEN) {
  89                        fprintf (stderr, "%s: Can't write %s: %s\n",
  90                                cmdname, imagefile, strerror(errno));
  91                        exit (EXIT_FAILURE);
  92                }
  93
  94                free (data);
  95                (void) munmap((void *)ptr, len);
  96                (void) close (ifd);
  97        }
  98
  99        return EXIT_SUCCESS;
 100}
 101