tools/fit_check_sign.c

   1 /*
   2  * (C) Copyright 2014
   3  * DENX Software Engineering
   4  * Heiko Schocher <hs@denx.de>
   5  *
   6  * Based on:
   7  * (C) Copyright 2008 Semihalf
   8  *
   9  * (C) Copyright 2000-2004
  10  * DENX Software Engineering
  11  * Wolfgang Denk, wd@denx.de
  12  *
  13  * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
  14  *              FIT image specific code abstracted from mkimage.c
  15  *              some functions added to address abstraction
  16  *
  17  * All rights reserved.
  18  *
  19  * SPDX-License-Identifier:     GPL-2.0+
  20  */
  21
  22 #include "mkimage.h"
  23 #include "fit_common.h"
  24 #include <image.h>
  25 #include <u-boot/crc.h>
  26
  27 void usage(char *cmdname)
  28 {
  29         fprintf(stderr, "Usage: %s -f fit file -k key file\n"
  30                          "          -f ==> set fit file which should be checked'\n"
  31                          "          -k ==> set key file which contains the key'\n",
  32                 cmdname);
  33         exit(EXIT_FAILURE);
  34 }
  35
  36 int main(int argc, char **argv)
  37 {
  38         int ffd = -1;
  39         int kfd = -1;
  40         struct stat fsbuf;
  41         struct stat ksbuf;
  42         void *fit_blob;
  43         char *fdtfile = NULL;
  44         char *keyfile = NULL;
  45         char cmdname[256];
  46         int ret;
  47         void *key_blob;
  48         int c;
  49
  50         strncpy(cmdname, *argv, sizeof(cmdname) - 1);
  51         cmdname[sizeof(cmdname) - 1] = '\0';
  52         while ((c = getopt(argc, argv, "f:k:")) != -1)
  53                 switch (c) {
  54                 case 'f':
  55                         fdtfile = optarg;
  56                         break;
  57                 case 'k':
  58                         keyfile = optarg;
  59                         break;
  60                 default:
  61                         usage(cmdname);
  62                         break;
  63         }
  64
  65         if (!fdtfile) {
  66                 fprintf(stderr, "%s: Missing fdt file\n", *argv);
  67                 usage(*argv);
  68         }
  69         if (!keyfile) {
  70                 fprintf(stderr, "%s: Missing key file\n", *argv);
  71                 usage(*argv);
  72         }
  73
  74         ffd = mmap_fdt(cmdname, fdtfile, 0, &fit_blob, &fsbuf, false);
  75         if (ffd < 0)
  76                 return EXIT_FAILURE;
  77         kfd = mmap_fdt(cmdname, keyfile, 0, &key_blob, &ksbuf, false);
  78         if (kfd < 0)
  79                 return EXIT_FAILURE;
  80
  81         image_set_host_blob(key_blob);
  82         ret = fit_check_sign(fit_blob, key_blob);
  83         if (!ret) {
  84                 ret = EXIT_SUCCESS;
  85                 fprintf(stderr, "Signature check OK\n");
  86         } else {
  87                 ret = EXIT_FAILURE;
  88                 fprintf(stderr, "Signature check Bad (error %d)\n", ret);
  89         }
  90
  91         (void) munmap((void *)fit_blob, fsbuf.st_size);
  92         (void) munmap((void *)key_blob, ksbuf.st_size);
  93
  94         close(ffd);
  95         close(kfd);
  96         exit(ret);
  97 }