xref: /freebsd/sys/crypto/intake.h (revision 95ee2897)
1 /*-
2  * Copyright (c) 2016 Eric McCorkle
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #ifndef _INTAKE_H_
28 #define _INTAKE_H_
29 
30 #include  <sys/param.h>
31 
32 /*
33  * This file provides an interface for providing keys to the kernel
34  * during boot time.
35  */
36 
37 #define MAX_KEY_BITS	4096
38 #define	MAX_KEY_BYTES	(MAX_KEY_BITS / NBBY)
39 
40 #define KEYBUF_SENTINEL	0xcee54b5d	/* KEYS4BSD */
41 
42 enum {
43         KEYBUF_TYPE_NONE,
44         KEYBUF_TYPE_GELI
45 };
46 
47 struct keybuf_ent {
48         unsigned int ke_type;
49         char ke_data[MAX_KEY_BYTES];
50 };
51 
52 struct keybuf {
53         unsigned int kb_nents;
54         struct keybuf_ent kb_ents[];
55 };
56 
57 #ifdef _KERNEL
58 /* Get the key intake buffer */
59 extern struct keybuf* get_keybuf(void);
60 #endif
61 
62 #endif
63