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 #include <machine/fpu.h>
44 #endif
45
46 #define AES128_ROUNDS 10
47 #define AES192_ROUNDS 12
48 #define AES256_ROUNDS 14
49 #define AES_SCHED_LEN ((AES256_ROUNDS + 1) * AES_BLOCK_LEN)
50 #define AES_SCHED_ALIGN 16
51
52 struct aesni_session {
53 uint8_t schedules[3 * AES_SCHED_LEN + AES_SCHED_ALIGN];
54 uint8_t *enc_schedule;
55 uint8_t *dec_schedule;
56 uint8_t *xts_schedule;
57 int rounds;
58 /* uint8_t *ses_ictx; */
59 /* uint8_t *ses_octx; */
60 int used;
61 int mlen;
62 int hash_len;
63 void (*hash_init)(void *);
64 int (*hash_update)(void *, const void *, u_int);
65 void (*hash_finalize)(void *, void *);
66 bool hmac;
67 };
68
69 /*
70 * Internal functions, implemented in assembler.
71 */
72 void aesni_set_enckey(const uint8_t *userkey,
73 uint8_t *encrypt_schedule /*__aligned(16)*/, int number_of_rounds);
74 void aesni_set_deckey(const uint8_t *encrypt_schedule /*__aligned(16)*/,
75 uint8_t *decrypt_schedule /*__aligned(16)*/, int number_of_rounds);
76
77 /*
78 * Slightly more public interfaces.
79 */
80 void aesni_encrypt_cbc(int rounds, const void *key_schedule /*__aligned(16)*/,
81 size_t len, const uint8_t *from, uint8_t *to,
82 const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
83 void aesni_decrypt_cbc(int rounds, const void *key_schedule /*__aligned(16)*/,
84 size_t len, uint8_t *buf, const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
85 void aesni_encrypt_ecb(int rounds, const void *key_schedule /*__aligned(16)*/,
86 size_t len, const uint8_t *from, uint8_t *to);
87 void aesni_decrypt_ecb(int rounds, const void *key_schedule /*__aligned(16)*/,
88 size_t len, const uint8_t *from, uint8_t *to);
89 void aesni_encrypt_icm(int rounds, const void *key_schedule /*__aligned(16)*/,
90 size_t len, const uint8_t *from, uint8_t *to,
91 const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
92
93 void aesni_encrypt_xts(int rounds, const void *data_schedule /*__aligned(16)*/,
94 const void *tweak_schedule /*__aligned(16)*/, size_t len,
95 const uint8_t *from, uint8_t *to,
96 const uint8_t iv[__min_size(AES_BLOCK_LEN)]);
97 void aesni_decrypt_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)]);
101
102 /* GCM & GHASH functions */
103 void AES_GCM_encrypt(const unsigned char *in, unsigned char *out,
104 const unsigned char *addt, const unsigned char *ivec,
105 unsigned char *tag, uint32_t nbytes, uint32_t abytes, int ibytes,
106 const unsigned char *key, int nr);
107 int AES_GCM_decrypt(const unsigned char *in, unsigned char *out,
108 const unsigned char *addt, const unsigned char *ivec,
109 const unsigned char *tag, uint32_t nbytes, uint32_t abytes, int ibytes,
110 const unsigned char *key, int nr);
111
112 /* CCM + CBC-MAC functions */
113 void AES_CCM_encrypt(const unsigned char *in, unsigned char *out,
114 const unsigned char *addt, const unsigned char *ivec,
115 unsigned char *tag, uint32_t nbytes, uint32_t abytes, int nlen,
116 int tag_length, const unsigned char *key, int nr);
117 int AES_CCM_decrypt(const unsigned char *in, unsigned char *out,
118 const unsigned char *addt, const unsigned char *ivec,
119 const unsigned char *tag, uint32_t nbytes, uint32_t abytes, int nlen,
120 int tag_length, const unsigned char *key, int nr);
121 void aesni_cipher_setup_common(struct aesni_session *ses,
122 const struct crypto_session_params *csp, const uint8_t *key, int keylen);
123
124 #endif /* _AESNI_H_ */
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