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/*-
* Copyright (c) 2010 Konstantin Belousov <kib@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _AESNI_H_
#define _AESNI_H_
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <opencrypto/cryptodev.h>
#if defined(__amd64__) || (defined(__i386__) && !defined(PC98))
#include <machine/cpufunc.h>
#include <machine/cputypes.h>
#include <machine/md_var.h>
#include <machine/specialreg.h>
#endif
#if defined(__i386__)
#include <machine/npx.h>
#elif defined(__amd64__)
#include <machine/fpu.h>
#endif
#define AES128_ROUNDS 10
#define AES192_ROUNDS 12
#define AES256_ROUNDS 14
#define AES_SCHED_LEN ((AES256_ROUNDS + 1) * AES_BLOCK_LEN)
struct aesni_session {
uint8_t enc_schedule[AES_SCHED_LEN] __aligned(16);
uint8_t dec_schedule[AES_SCHED_LEN] __aligned(16);
uint8_t xts_schedule[AES_SCHED_LEN] __aligned(16);
uint8_t iv[AES_BLOCK_LEN];
int algo;
int rounds;
/* uint8_t *ses_ictx; */
/* uint8_t *ses_octx; */
/* int ses_mlen; */
int used;
uint32_t id;
TAILQ_ENTRY(aesni_session) next;
struct fpu_kern_ctx *fpu_ctx;
};
/*
* Internal functions, implemented in assembler.
*/
void aesni_set_enckey(const uint8_t *userkey,
uint8_t *encrypt_schedule /*__aligned(16)*/, int number_of_rounds);
void aesni_set_deckey(const uint8_t *encrypt_schedule /*__aligned(16)*/,
uint8_t *decrypt_schedule /*__aligned(16)*/, int number_of_rounds);
/*
* Slightly more public interfaces.
*/
void aesni_encrypt_cbc(int rounds, const void *key_schedule /*__aligned(16)*/,
size_t len, const uint8_t *from, uint8_t *to,
const uint8_t iv[AES_BLOCK_LEN]);
void aesni_decrypt_cbc(int rounds, const void *key_schedule /*__aligned(16)*/,
size_t len, uint8_t *buf, const uint8_t iv[AES_BLOCK_LEN]);
void aesni_encrypt_ecb(int rounds, const void *key_schedule /*__aligned(16)*/,
size_t len, const uint8_t *from, uint8_t *to);
void aesni_decrypt_ecb(int rounds, const void *key_schedule /*__aligned(16)*/,
size_t len, const uint8_t *from, uint8_t *to);
void aesni_encrypt_xts(int rounds, const void *data_schedule /*__aligned(16)*/,
const void *tweak_schedule /*__aligned(16)*/, size_t len,
const uint8_t *from, uint8_t *to, const uint8_t iv[AES_BLOCK_LEN]);
void aesni_decrypt_xts(int rounds, const void *data_schedule /*__aligned(16)*/,
const void *tweak_schedule /*__aligned(16)*/, size_t len,
const uint8_t *from, uint8_t *to, const uint8_t iv[AES_BLOCK_LEN]);
int aesni_cipher_setup(struct aesni_session *ses,
struct cryptoini *encini);
int aesni_cipher_process(struct aesni_session *ses,
struct cryptodesc *enccrd, struct cryptop *crp);
uint8_t *aesni_cipher_alloc(struct cryptodesc *enccrd, struct cryptop *crp,
int *allocated);
#endif /* _AESNI_H_ */
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