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