1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2007 4 * Heiko Schocher, DENX Software Engineering, <hs (at) 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 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
