FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_sha1.h

     /*      $KAME: sctp_sha1.h,v 1.4 2002/10/09 18:01:22 itojun Exp $       */
     /*      $DragonFly: src/sys/netinet/sctp_sha1.h,v 1.2 2006/05/20 02:42:12 dillon Exp $  */
     
     #ifndef _NETINET_SCTP_SHA1_H_
     #define _NETINET_SCTP_SHA1_H_
     
     /*
      * Copyright (c) 2001, 2002, 2004 Cisco Systems, 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Cisco Systems, Inc.
     * 4. Neither the name of the project nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS 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 CISCO SYSTEMS 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.
     */
    #include <sys/types.h>
    
    struct sha1_context {
            unsigned int A;
            unsigned int B;
            unsigned int C;
            unsigned int D;
            unsigned int E;
            unsigned int H0;
            unsigned int H1;
            unsigned int H2;
            unsigned int H3;
            unsigned int H4;
            unsigned int words[80];
            unsigned int TEMP;
            /* block I am collecting to process */
            char sha_block[64];
            /* collected so far */
            int how_many_in_block;
            unsigned int running_total;
    };
    
    
    #define F1(B,C,D) (((B & C) | ((~B) & D)))      /*  0  <= t <= 19 */
    #define F2(B,C,D) (B ^ C ^ D)                   /*  20 <= t <= 39 */
    #define F3(B,C,D) ((B & C) | (B & D) | (C & D)) /*  40 <= t <= 59 */
    #define F4(B,C,D) (B ^ C ^ D)                   /* 600 <= t <= 79 */
    
    /* circular shift */
    #define CSHIFT(A,B) ((B << A) | (B >> (32-A)))
    
    #define K1 0x5a827999       /* 0  <= t <= 19 */
    #define K2 0x6ed9eba1       /* 20 <= t <= 39 */
    #define K3 0x8f1bbcdc       /* 40 <= t <= 59 */
    #define K4 0xca62c1d6       /* 60 <= t <= 79 */
    
    #define H0INIT 0x67452301
    #define H1INIT 0xefcdab89
    #define H2INIT 0x98badcfe
    #define H3INIT 0x10325476
    #define H4INIT 0xc3d2e1f0
    
    #if defined(_KERNEL) || (defined(__APPLE__) && defined(KERNEL))
    
    void SHA1_Init(struct sha1_context *);
    void SHA1_Process(struct sha1_context *, unsigned char *, int);
    void SHA1_Final(struct sha1_context *, unsigned char *);
    
    #endif /* _KERNEL */
    #endif

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