mirror of https://github.com/wolfSSL/wolfBoot.git
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/* otp-keystore-gen.c
|
|
*
|
|
* Command line utility to create a OTP image
|
|
*
|
|
*
|
|
* Copyright (C) 2024 wolfSSL Inc.
|
|
*
|
|
* This file is part of wolfBoot.
|
|
*
|
|
* wolfBoot is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* wolfBoot is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
|
|
*/
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
|
|
#include "wolfboot/wolfboot.h"
|
|
#include "keystore.h"
|
|
#include "otp_keystore.h"
|
|
|
|
extern struct keystore_slot PubKeys[];
|
|
|
|
const char outfile[] = "otp.bin";
|
|
|
|
int main(void)
|
|
{
|
|
int n_keys = keystore_num_pubkeys();
|
|
int i;
|
|
struct wolfBoot_otp_hdr hdr;
|
|
uint32_t tot_len;
|
|
int ofd;
|
|
int slot_size;
|
|
|
|
memcpy(hdr.keystore_hdr_magic, KEYSTORE_HDR_MAGIC, 8);
|
|
hdr.item_count = n_keys;
|
|
hdr.flags = 0;
|
|
hdr.version = WOLFBOOT_VERSION;
|
|
|
|
/* Sanity check to avoid writing an empty keystore */
|
|
if (n_keys < 1) {
|
|
fprintf(stderr, "Error: too few keys (%d), refusing to create %s\n", n_keys, outfile);
|
|
exit(1);
|
|
}
|
|
|
|
slot_size = keystore_get_size(0);
|
|
slot_size += KEYSTORE_HDR_SIZE;
|
|
fprintf(stderr, "Slot size: %d\n", slot_size);
|
|
fprintf(stderr, "Number of slots: %d\n", n_keys);
|
|
fprintf(stderr, "%s size: %d\n", outfile, slot_size * n_keys + sizeof(struct wolfBoot_otp_hdr));
|
|
|
|
ofd = open(outfile, O_WRONLY|O_CREAT|O_TRUNC, 0600);
|
|
if (ofd < 0) {
|
|
perror("opening output file");
|
|
exit(2);
|
|
}
|
|
|
|
/* Write the header to the beginning of the OTP binary file */
|
|
if (write(ofd, &hdr, sizeof(hdr)) != sizeof(hdr)) {
|
|
fprintf(stderr, "Error writing to %s: %s\n", outfile, strerror(errno));
|
|
}
|
|
|
|
for (i = 0; i < n_keys; i++) {
|
|
/* Write each public key to its slot in OTP */
|
|
if (write(ofd, &PubKeys[i],
|
|
slot_size) < 0) {
|
|
fprintf(stderr, "Error adding key %d to %s: %s\n", i, outfile, strerror(errno));
|
|
exit(3);
|
|
}
|
|
}
|
|
fprintf(stderr, "%s successfully created.\nGoodbye.\n", outfile);
|
|
close(ofd);
|
|
return 0;
|
|
}
|