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