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: src/sys/crypto/aesni/aesni.h,v 1.2 2010/09/23 11:57:25 pjd Exp $ 27 */ 28 29 #ifndef _AESNI_H_ 30 #define _AESNI_H_ 31 32 #include <sys/types.h> 33 #include <sys/queue.h> 34 35 #include <opencrypto/cryptodev.h> 36 37 #if defined(__x86_64__) 38 #include <machine/cpufunc.h> 39 #include <machine/cputypes.h> 40 #include <machine/md_var.h> 41 #include <machine/specialreg.h> 42 #include <machine/npx.h> 43 #endif 44 45 #define AESNI_ALIGN 16 46 47 #define AES128_ROUNDS 10 48 #define AES192_ROUNDS 12 49 #define AES256_ROUNDS 14 50 #define AES_SCHED_LEN ((AES256_ROUNDS + 1) * AES_BLOCK_LEN) 51 52 struct aesni_session { 53 uint8_t enc_schedule[AES_SCHED_LEN] __aligned(16); 54 uint8_t dec_schedule[AES_SCHED_LEN] __aligned(16); 55 uint8_t xts_schedule[AES_SCHED_LEN] __aligned(16); 56 uint8_t iv[AES_BLOCK_LEN]; 57 int algo; 58 int rounds; 59 /* uint8_t *ses_ictx; */ 60 /* uint8_t *ses_octx; */ 61 /* int ses_mlen; */ 62 int used; 63 uint32_t id; 64 TAILQ_ENTRY(aesni_session) next; 65 #if 0 66 struct fpu_kern_ctx fpu_ctx; 67 #endif 68 }; 69 70 /* 71 * Internal functions, implemented in assembler. 72 */ 73 void aesni_enc(int rounds, const uint8_t *key_schedule, 74 const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN], 75 const uint8_t iv[AES_BLOCK_LEN]); 76 void aesni_dec(int rounds, const uint8_t *key_schedule, 77 const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN], 78 const uint8_t iv[AES_BLOCK_LEN]); 79 void aesni_set_enckey(const uint8_t *userkey, uint8_t *encrypt_schedule, 80 int number_of_rounds); 81 void aesni_set_deckey(const uint8_t *encrypt_schedule, 82 uint8_t *decrypt_schedule, int number_of_rounds); 83 84 /* 85 * Slightly more public interfaces. 86 */ 87 void aesni_encrypt_cbc(int rounds, const void *key_schedule, size_t len, 88 const uint8_t *from, uint8_t *to, const uint8_t iv[AES_BLOCK_LEN]); 89 void aesni_decrypt_cbc(int rounds, const void *key_schedule, size_t len, 90 const uint8_t *from, const uint8_t iv[AES_BLOCK_LEN]); 91 void aesni_encrypt_ecb(int rounds, const void *key_schedule, size_t len, 92 const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN]); 93 void aesni_decrypt_ecb(int rounds, const void *key_schedule, size_t len, 94 const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN]); 95 96 int aesni_cipher_setup(struct aesni_session *ses, 97 struct cryptoini *encini); 98 int aesni_cipher_process(struct aesni_session *ses, 99 struct cryptodesc *enccrd, struct cryptop *crp); 100 101 uint8_t *aesni_cipher_alloc(struct cryptodesc *enccrd, struct cryptop *crp, 102 int *allocated); 103 104 #endif 105