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__) && !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 55 struct 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 */ 74 void aesni_set_enckey(const uint8_t *userkey, 75 uint8_t *encrypt_schedule /*__aligned(16)*/, int number_of_rounds); 76 void aesni_set_deckey(const uint8_t *encrypt_schedule /*__aligned(16)*/, 77 uint8_t *decrypt_schedule /*__aligned(16)*/, int number_of_rounds); 78 79 /* 80 * Slightly more public interfaces. 81 */ 82 void aesni_encrypt_cbc(int rounds, const void *key_schedule /*__aligned(16)*/, 83 size_t len, const uint8_t *from, uint8_t *to, 84 const uint8_t iv[AES_BLOCK_LEN]); 85 void aesni_decrypt_cbc(int rounds, const void *key_schedule /*__aligned(16)*/, 86 size_t len, uint8_t *buf, const uint8_t iv[AES_BLOCK_LEN]); 87 void aesni_encrypt_ecb(int rounds, const void *key_schedule /*__aligned(16)*/, 88 size_t len, const uint8_t *from, uint8_t *to); 89 void aesni_decrypt_ecb(int rounds, const void *key_schedule /*__aligned(16)*/, 90 size_t len, const uint8_t *from, uint8_t *to); 91 92 void aesni_encrypt_xts(int rounds, const void *data_schedule /*__aligned(16)*/, 93 const void *tweak_schedule /*__aligned(16)*/, size_t len, 94 const uint8_t *from, uint8_t *to, const uint8_t iv[AES_BLOCK_LEN]); 95 void aesni_decrypt_xts(int rounds, const void *data_schedule /*__aligned(16)*/, 96 const void *tweak_schedule /*__aligned(16)*/, size_t len, 97 const uint8_t *from, uint8_t *to, const uint8_t iv[AES_BLOCK_LEN]); 98 99 int aesni_cipher_setup_common(struct aesni_session *ses, const uint8_t *key, 100 int keylen); 101 uint8_t *aesni_cipher_alloc(struct cryptodesc *enccrd, struct cryptop *crp, 102 int *allocated); 103 104 #endif /* _AESNI_H_ */ 105