1 // SPDX-License-Identifier: GPL-2.0+
4 * Heiko Schocher, DENX Software Engineering, <hs@denx.de>
7 #include "os_support.h"
15 #include <u-boot/sha1.h>
17 int main (int argc, char **argv)
19 unsigned char output[20];
23 char *cmdname = *argv;
27 unsigned char *ptroff;
33 ifd = open (imagefile, O_RDWR|O_BINARY);
35 fprintf (stderr, "%s: Can't open %s: %s\n",
36 cmdname, imagefile, strerror(errno));
39 if (fstat (ifd, &sbuf) < 0) {
40 fprintf (stderr, "%s: Can't stat %s: %s\n",
41 cmdname, imagefile, strerror(errno));
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));
53 /* create a copy, so we can blank out the sha1 sum */
55 memcpy (data, ptr, len);
57 ptroff = &data[len + off];
58 for (i = 0; i < SHA1_SUM_LEN; i++) {
62 sha1_csum ((unsigned char *) data, len, (unsigned char *)output);
64 printf ("U-Boot sum:\n");
65 for (i = 0; i < 20 ; i++) {
66 printf ("%02X ", output[i]);
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));
78 (void) munmap((void *)ptr, len);