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
main(int argc,char ** argv)17 int 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