aesni.h revision 256281 
1/*-
2 * Copyright (c) 2010 Konstantin Belousov <kib@FreeBSD.org>
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 AUTHORS 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 AUTHORS 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 * $FreeBSD: stable/10/sys/crypto/aesni/aesni.h 255187 2013-09-03 18:31:23Z jmg $
27 */
28
29#ifndef _AESNI_H_
30#define _AESNI_H_
31
32#include <sys/types.h>
33#include <sys/malloc.h>
34#include <sys/queue.h>
35
36#include <opencrypto/cryptodev.h>
37
38#if defined(__amd64__) || (defined(__i386__) && !defined(PC98))
39#include <machine/cpufunc.h>
40#include <machine/cputypes.h>
41#include <machine/md_var.h>
42#include <machine/specialreg.h>
43#endif
44#if defined(__i386__)
45#include <machine/npx.h>
46#elif defined(__amd64__)
47#include <machine/fpu.h>
48#endif
49
50#define	AES128_ROUNDS	10
51#define	AES192_ROUNDS	12
52#define	AES256_ROUNDS	14
53#define	AES_SCHED_LEN	((AES256_ROUNDS + 1) * AES_BLOCK_LEN)
54
55struct aesni_session {
56	uint8_t enc_schedule[AES_SCHED_LEN] __aligned(16);
57	uint8_t dec_schedule[AES_SCHED_LEN] __aligned(16);
58	uint8_t xts_schedule[AES_SCHED_LEN] __aligned(16);
59	uint8_t iv[AES_BLOCK_LEN];
60	int algo;
61	int rounds;
62	/* uint8_t *ses_ictx; */
63	/* uint8_t *ses_octx; */
64	/* int ses_mlen; */
65	int used;
66	uint32_t id;
67	TAILQ_ENTRY(aesni_session) next;
68	struct fpu_kern_ctx *fpu_ctx;
69};
70
71/*
72 * Internal functions, implemented in assembler.
73 */
74void aesni_set_enckey(const uint8_t *userkey, uint8_t *encrypt_schedule,
75    int number_of_rounds);
76void aesni_set_deckey(const uint8_t *encrypt_schedule,
77    uint8_t *decrypt_schedule, int number_of_rounds);
78
79/*
80 * Slightly more public interfaces.
81 */
82void aesni_encrypt_cbc(int rounds, const void *key_schedule, size_t len,
83    const uint8_t *from, uint8_t *to, const uint8_t iv[AES_BLOCK_LEN]);
84void aesni_decrypt_cbc(int rounds, const void *key_schedule, size_t len,
85    uint8_t *buf, const uint8_t iv[AES_BLOCK_LEN]);
86void aesni_encrypt_ecb(int rounds, const void *key_schedule, size_t len,
87    const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN]);
88void aesni_decrypt_ecb(int rounds, const void *key_schedule, size_t len,
89    const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN]);
90
91void aesni_encrypt_xts(int rounds, const void *data_schedule,
92    const void *tweak_schedule, size_t len, const uint8_t *from, uint8_t *to,
93    const uint8_t iv[AES_BLOCK_LEN]);
94void aesni_decrypt_xts(int rounds, const void *data_schedule,
95    const void *tweak_schedule, size_t len, const uint8_t *from, uint8_t *to,
96    const uint8_t iv[AES_BLOCK_LEN]);
97
98int aesni_cipher_setup(struct aesni_session *ses,
99    struct cryptoini *encini);
100int aesni_cipher_process(struct aesni_session *ses,
101    struct cryptodesc *enccrd, struct cryptop *crp);
102
103uint8_t *aesni_cipher_alloc(struct cryptodesc *enccrd, struct cryptop *crp,
104    int *allocated);
105
106#endif
107