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 * $FreeBSD$
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__)
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
55/* SHA1, SHA2-224 and SHA2-256 only. */
56#define	AESNI_SHA_BLOCK_LEN	64
57
58struct aesni_session {
59	uint8_t enc_schedule[AES_SCHED_LEN] __aligned(16);
60	uint8_t dec_schedule[AES_SCHED_LEN] __aligned(16);
61	uint8_t xts_schedule[AES_SCHED_LEN] __aligned(16);
62	uint8_t hmac_key[AESNI_SHA_BLOCK_LEN];
63	int algo;
64	int rounds;
65	/* uint8_t *ses_ictx; */
66	/* uint8_t *ses_octx; */
67	/* int ses_mlen; */
68	int used;
69	int auth_algo;
70	int mlen;
71};
72
73/*
74 * Internal functions, implemented in assembler.
75 */
76void aesni_set_enckey(const uint8_t *userkey,
77    uint8_t *encrypt_schedule /*__aligned(16)*/, int number_of_rounds);
78void aesni_set_deckey(const uint8_t *encrypt_schedule /*__aligned(16)*/,
79    uint8_t *decrypt_schedule /*__aligned(16)*/, int number_of_rounds);
80
81/*
82 * Slightly more public interfaces.
83 */
84void aesni_encrypt_cbc(int rounds, const void *key_schedule /*__aligned(16)*/,
85    size_t len, const uint8_t *from, uint8_t *to,
86    const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
87void aesni_decrypt_cbc(int rounds, const void *key_schedule /*__aligned(16)*/,
88    size_t len, uint8_t *buf, const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
89void aesni_encrypt_ecb(int rounds, const void *key_schedule /*__aligned(16)*/,
90    size_t len, const uint8_t *from, uint8_t *to);
91void aesni_decrypt_ecb(int rounds, const void *key_schedule /*__aligned(16)*/,
92    size_t len, const uint8_t *from, uint8_t *to);
93void aesni_encrypt_icm(int rounds, const void *key_schedule /*__aligned(16)*/,
94    size_t len, const uint8_t *from, uint8_t *to,
95    const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
96
97void aesni_encrypt_xts(int rounds, const void *data_schedule /*__aligned(16)*/,
98    const void *tweak_schedule /*__aligned(16)*/, size_t len,
99    const uint8_t *from, uint8_t *to,
100    const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
101void aesni_decrypt_xts(int rounds, const void *data_schedule /*__aligned(16)*/,
102    const void *tweak_schedule /*__aligned(16)*/, size_t len,
103    const uint8_t *from, uint8_t *to,
104    const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
105
106/* GCM & GHASH functions */
107void AES_GCM_encrypt(const unsigned char *in, unsigned char *out,
108    const unsigned char *addt, const unsigned char *ivec,
109    unsigned char *tag, uint32_t nbytes, uint32_t abytes, int ibytes,
110    const unsigned char *key, int nr);
111int AES_GCM_decrypt(const unsigned char *in, unsigned char *out,
112    const unsigned char *addt, const unsigned char *ivec,
113    const unsigned char *tag, uint32_t nbytes, uint32_t abytes, int ibytes,
114    const unsigned char *key, int nr);
115
116/* CCM + CBC-MAC functions */
117void AES_CCM_encrypt(const unsigned char *in, unsigned char *out,
118    const unsigned char *addt, const unsigned char *ivec,
119    unsigned char *tag, uint32_t nbytes, uint32_t abytes, int ibytes,
120    const unsigned char *key, int nr);
121int AES_CCM_decrypt(const unsigned char *in, unsigned char *out,
122    const unsigned char *addt, const unsigned char *ivec,
123    const unsigned char *tag, uint32_t nbytes, uint32_t abytes, int ibytes,
124    const unsigned char *key, int nr);
125int aesni_cipher_setup_common(struct aesni_session *ses, const uint8_t *key,
126    int keylen);
127
128#endif /* _AESNI_H_ */
129