FreeBSD/Linux Kernel Cross Reference
sys/crypto/aesni/aesni.h

     /*-
      * 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;
    };
    
    /*
     * 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_common(struct aesni_session *ses, const uint8_t *key,
        int keylen);
   uint8_t *aesni_cipher_alloc(struct cryptodesc *enccrd, struct cryptop *crp,
       int *allocated);
   
   #endif /* _AESNI_H_ */

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