FreeBSD/Linux Kernel Cross Reference
sys/crypto/cast128/cast128_subkey.h

     /*      $FreeBSD$       */
     /*      $KAME: cast128_subkey.h,v 1.3 2000/03/27 04:36:30 sumikawa Exp $        */
     
     /*
      * heavily modified by Tomomi Suzuki <suzuki@grelot.elec.ryukoku.ac.jp>
      */
     /*
      * The CAST-128 Encryption Algorithm (RFC 2144)
      *
     * original implementation <Hideo "Sir MaNMOS" Morisita>
     * 1997/08/21
     */
    /*
     * Copyright (C) 1997 Hideo "Sir MANMOS" Morishita
     * 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 Hideo "Sir MaNMOS" Morishita ``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 Hideo "Sir MaNMOS" Morishita 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.
     */
    
    #ifndef RFC2144_CAST_128_SUBKEY_H
    #define RFC2144_CAST_128_SUBKEY_H
    
    #define x0x1x2x3 buf[0]
    #define x4x5x6x7 buf[1]
    #define x8x9xAxB buf[2]
    #define xCxDxExF buf[3]
    #define z0z1z2z3 buf[4]
    #define z4z5z6z7 buf[5]
    #define z8z9zAzB buf[6]
    #define zCzDzEzF buf[7]
    
    #define byte0(x) (((x) >> 24))
    #define byte1(x) (((x) >> 16) & 0xff)
    #define byte2(x) (((x) >> 8) & 0xff)
    #define byte3(x) (((x)) & 0xff)
    
    #define x0 byte0(buf[0])
    #define x1 byte1(buf[0])
    #define x2 byte2(buf[0])
    #define x3 byte3(buf[0])
    #define x4 byte0(buf[1])
    #define x5 byte1(buf[1])
    #define x6 byte2(buf[1])
    #define x7 byte3(buf[1])
    #define x8 byte0(buf[2])
    #define x9 byte1(buf[2])
    #define xA byte2(buf[2])
    #define xB byte3(buf[2])
    #define xC byte0(buf[3])
    #define xD byte1(buf[3])
    #define xE byte2(buf[3])
    #define xF byte3(buf[3])
    #define z0 byte0(buf[4])
    #define z1 byte1(buf[4])
    #define z2 byte2(buf[4])
    #define z3 byte3(buf[4])
    #define z4 byte0(buf[5])
    #define z5 byte1(buf[5])
    #define z6 byte2(buf[5])
    #define z7 byte3(buf[5])
    #define z8 byte0(buf[6])
    #define z9 byte1(buf[6])
    #define zA byte2(buf[6])
    #define zB byte3(buf[6])
    #define zC byte0(buf[7])
    #define zD byte1(buf[7])
    #define zE byte2(buf[7])
    #define zF byte3(buf[7])
    
    #define circular_leftshift(x, y) ( ((x) << (y)) | ((x) >> (32-(y))) )
    
    #endif
    

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