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

     /*-
      * Copyright 2013 John-Mark Gurney <jmg@FreeBSD.org>
      * Copyright 2015 Netflix, Inc.
      * 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 AUTHOR 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 AUTHOR 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: releng/12.0/sys/crypto/aesni/aesencdec.h 285254 2015-07-07 20:31:09Z jmg $
     *
     */
    
    #ifndef _AESENCDEC_H_
    #define _AESENCDEC_H_
    
    #include <crypto/aesni/aesni_os.h>
    
    #include <wmmintrin.h>
    
    static inline void
    aesni_enc8(int rounds, const __m128i *keysched, __m128i a,
        __m128i b, __m128i c, __m128i d, __m128i e, __m128i f, __m128i g,
        __m128i h, __m128i out[8])
    {
            int i;
    
            a ^= keysched[0];
            b ^= keysched[0];
            c ^= keysched[0];
            d ^= keysched[0];
            e ^= keysched[0];
            f ^= keysched[0];
            g ^= keysched[0];
            h ^= keysched[0];
    
            for (i = 0; i < rounds; i++) {
                    a = _mm_aesenc_si128(a, keysched[i + 1]);
                    b = _mm_aesenc_si128(b, keysched[i + 1]);
                    c = _mm_aesenc_si128(c, keysched[i + 1]);
                    d = _mm_aesenc_si128(d, keysched[i + 1]);
                    e = _mm_aesenc_si128(e, keysched[i + 1]);
                    f = _mm_aesenc_si128(f, keysched[i + 1]);
                    g = _mm_aesenc_si128(g, keysched[i + 1]);
                    h = _mm_aesenc_si128(h, keysched[i + 1]);
            }
    
            out[0] = _mm_aesenclast_si128(a, keysched[i + 1]);
            out[1] = _mm_aesenclast_si128(b, keysched[i + 1]);
            out[2] = _mm_aesenclast_si128(c, keysched[i + 1]);
            out[3] = _mm_aesenclast_si128(d, keysched[i + 1]);
            out[4] = _mm_aesenclast_si128(e, keysched[i + 1]);
            out[5] = _mm_aesenclast_si128(f, keysched[i + 1]);
            out[6] = _mm_aesenclast_si128(g, keysched[i + 1]);
            out[7] = _mm_aesenclast_si128(h, keysched[i + 1]);
    }
    
    static inline void
    aesni_dec8(int rounds, const __m128i *keysched, __m128i a,
        __m128i b, __m128i c, __m128i d, __m128i e, __m128i f, __m128i g,
        __m128i h, __m128i out[8])
    {
            int i;
    
            a ^= keysched[0];
            b ^= keysched[0];
            c ^= keysched[0];
            d ^= keysched[0];
            e ^= keysched[0];
            f ^= keysched[0];
            g ^= keysched[0];
            h ^= keysched[0];
    
            for (i = 0; i < rounds; i++) {
                    a = _mm_aesdec_si128(a, keysched[i + 1]);
                    b = _mm_aesdec_si128(b, keysched[i + 1]);
                    c = _mm_aesdec_si128(c, keysched[i + 1]);
                    d = _mm_aesdec_si128(d, keysched[i + 1]);
                    e = _mm_aesdec_si128(e, keysched[i + 1]);
                    f = _mm_aesdec_si128(f, keysched[i + 1]);
                    g = _mm_aesdec_si128(g, keysched[i + 1]);
                    h = _mm_aesdec_si128(h, keysched[i + 1]);
           }
   
           out[0] = _mm_aesdeclast_si128(a, keysched[i + 1]);
           out[1] = _mm_aesdeclast_si128(b, keysched[i + 1]);
           out[2] = _mm_aesdeclast_si128(c, keysched[i + 1]);
           out[3] = _mm_aesdeclast_si128(d, keysched[i + 1]);
           out[4] = _mm_aesdeclast_si128(e, keysched[i + 1]);
           out[5] = _mm_aesdeclast_si128(f, keysched[i + 1]);
           out[6] = _mm_aesdeclast_si128(g, keysched[i + 1]);
           out[7] = _mm_aesdeclast_si128(h, keysched[i + 1]);
   }
   
   /* rounds is passed in as rounds - 1 */
   static inline __m128i
   aesni_enc(int rounds, const __m128i *keysched, const __m128i from)
   {
           __m128i tmp;
           int i;
   
           tmp = from ^ keysched[0];
           for (i = 1; i < rounds; i += 2) {
                   tmp = _mm_aesenc_si128(tmp, keysched[i]);
                   tmp = _mm_aesenc_si128(tmp, keysched[i + 1]);
           }
   
           tmp = _mm_aesenc_si128(tmp, keysched[rounds]);
           return _mm_aesenclast_si128(tmp, keysched[rounds + 1]);
   }
   
   static inline __m128i
   aesni_dec(int rounds, const __m128i *keysched, const __m128i from)
   {
           __m128i tmp;
           int i;
   
           tmp = from ^ keysched[0];
   
           for (i = 1; i < rounds; i += 2) {
                   tmp = _mm_aesdec_si128(tmp, keysched[i]);
                   tmp = _mm_aesdec_si128(tmp, keysched[i + 1]);
           }
   
           tmp = _mm_aesdec_si128(tmp, keysched[rounds]);
           return _mm_aesdeclast_si128(tmp, keysched[rounds + 1]);
   }
   
   #endif /* _AESENCDEC_H_ */

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