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
  34#ifndef __ASSEMBLY__
  35#define __ASSEMBLY__            /* Dirty trick to get only #defines     */
  36#endif
  37#include <config.h>
  38#undef  __ASSEMBLY__
  39
  40extern void sha1_csum (unsigned char *input, int ilen, unsigned char output[20]);
  41
  42int main (int argc, char **argv)
  43{
  44        unsigned char output[20];
  45        int i, len;
  46
  47        char    *imagefile;
  48        char    *cmdname = *argv;
  49        unsigned char   *ptr;
  50        unsigned char   *data;
  51        struct stat sbuf;
  52        unsigned char   *ptroff;
  53        int     ifd;
  54        int     off;
  55
  56        if (argc > 1) {
  57                imagefile = argv[1];
  58                ifd = open (imagefile, O_RDWR|O_BINARY);
  59                if (ifd < 0) {
  60                        fprintf (stderr, "%s: Can't open %s: %s\n",
  61                                cmdname, imagefile, strerror(errno));
  62                        exit (EXIT_FAILURE);
  63                }
  64                if (fstat (ifd, &sbuf) < 0) {
  65                        fprintf (stderr, "%s: Can't stat %s: %s\n",
  66                                cmdname, imagefile, strerror(errno));
  67                        exit (EXIT_FAILURE);
  68                }
  69                len = sbuf.st_size;
  70                ptr = (unsigned char *)mmap(0, len,
  71                                    PROT_READ, MAP_SHARED, ifd, 0);
  72                if (ptr == (unsigned char *)MAP_FAILED) {
  73                        fprintf (stderr, "%s: Can't read %s: %s\n",
  74                                cmdname, imagefile, strerror(errno));
  75                        exit (EXIT_FAILURE);
  76                }
  77
  78                /* create a copy, so we can blank out the sha1 sum */
  79                data = malloc (len);
  80                memcpy (data, ptr, len);
  81                off = SHA1_SUM_POS;
  82                ptroff = &data[len +  off];
  83                for (i = 0; i < SHA1_SUM_LEN; i++) {
  84                        ptroff[i] = 0;
  85                }
  86
  87                sha1_csum ((unsigned char *) data, len, (unsigned char *)output);
  88
  89                printf ("U-Boot sum:\n");
  90                for (i = 0; i < 20 ; i++) {
  91                    printf ("%02X ", output[i]);
  92                }
  93                printf ("\n");
  94                /* overwrite the sum in the bin file, with the actual */
  95                lseek (ifd, SHA1_SUM_POS, SEEK_END);
  96                if (write (ifd, output, SHA1_SUM_LEN) != SHA1_SUM_LEN) {
  97                        fprintf (stderr, "%s: Can't write %s: %s\n",
  98                                cmdname, imagefile, strerror(errno));
  99                        exit (EXIT_FAILURE);
 100                }
 101
 102                free (data);
 103                (void) munmap((void *)ptr, len);
 104                (void) close (ifd);
 105        }
 106
 107        return EXIT_SUCCESS;
 108}
 109