1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2018 Ian Lepore <ian@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30#include <stand.h>
31#include <bootstrap.h>
32#include <sys/param.h>
33#include <sys/linker.h>
34#include "geliboot.h"
35
36/*
37 * Export a keybuf as metadata attached to a kernel module.  This is separate
38 * from the lower-level key management functions to avoid creating a linker
39 * dependency on the libsa metadata routines when the geli code is linked into
40 * early-stage bootloaders such as gptboot.  Only loader(8) variants call this.
41 */
42void
43geli_export_key_metadata(struct preloaded_file *kfp)
44{
45    struct keybuf *keybuf;
46
47    keybuf = malloc(GELI_KEYBUF_SIZE);
48    geli_export_key_buffer(keybuf);
49    file_addmetadata(kfp, MODINFOMD_KEYBUF, GELI_KEYBUF_SIZE, keybuf);
50    explicit_bzero(keybuf, GELI_KEYBUF_SIZE);
51    free(keybuf);
52}
53