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Annotation of sys/crypto/ecb3_enc.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: ecb3_enc.c,v 1.2 2002/10/27 13:24:26 miod Exp $       */
        !             2:
        !             3: /* lib/des/ecb3_enc.c */
        !             4: /* Copyright (C) 1995 Eric Young (eay@mincom.oz.au)
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * This file is part of an SSL implementation written
        !             8:  * by Eric Young (eay@mincom.oz.au).
        !             9:  * The implementation was written so as to conform with Netscapes SSL
        !            10:  * specification.  This library and applications are
        !            11:  * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
        !            12:  * as long as the following conditions are aheared to.
        !            13:  *
        !            14:  * Copyright remains Eric Young's, and as such any Copyright notices in
        !            15:  * the code are not to be removed.  If this code is used in a product,
        !            16:  * Eric Young should be given attribution as the author of the parts used.
        !            17:  * This can be in the form of a textual message at program startup or
        !            18:  * in documentation (online or textual) provided with the package.
        !            19:  *
        !            20:  * Redistribution and use in source and binary forms, with or without
        !            21:  * modification, are permitted provided that the following conditions
        !            22:  * are met:
        !            23:  * 1. Redistributions of source code must retain the copyright
        !            24:  *    notice, this list of conditions and the following disclaimer.
        !            25:  * 2. Redistributions in binary form must reproduce the above copyright
        !            26:  *    notice, this list of conditions and the following disclaimer in the
        !            27:  *    documentation and/or other materials provided with the distribution.
        !            28:  * 3. All advertising materials mentioning features or use of this software
        !            29:  *    must display the following acknowledgement:
        !            30:  *    This product includes software developed by Eric Young (eay@mincom.oz.au)
        !            31:  *
        !            32:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
        !            33:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            34:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            35:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            36:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            37:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            38:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            39:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            40:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            41:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            42:  * SUCH DAMAGE.
        !            43:  *
        !            44:  * The licence and distribution terms for any publically available version or
        !            45:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
        !            46:  * copied and put under another distribution licence
        !            47:  * [including the GNU Public Licence.]
        !            48:  */
        !            49:
        !            50: #include "des_locl.h"
        !            51:
        !            52: void des_ecb3_encrypt(input, output, ks1, ks2, ks3, encrypt)
        !            53: des_cblock (*input);
        !            54: des_cblock (*output);
        !            55: des_key_schedule ks1;
        !            56: des_key_schedule ks2;
        !            57: des_key_schedule ks3;
        !            58: int encrypt;
        !            59:        {
        !            60:        register u_int32_t l0,l1;
        !            61:        register unsigned char *in,*out;
        !            62:        u_int32_t ll[2];
        !            63:
        !            64:        in=(unsigned char *)input;
        !            65:        out=(unsigned char *)output;
        !            66:        c2l(in,l0);
        !            67:        c2l(in,l1);
        !            68:        IP(l0,l1);
        !            69:        ll[0]=l0;
        !            70:        ll[1]=l1;
        !            71:        des_encrypt2(ll,ks1,encrypt);
        !            72:        des_encrypt2(ll,ks2,!encrypt);
        !            73:        des_encrypt2(ll,ks3,encrypt);
        !            74:        l0=ll[0];
        !            75:        l1=ll[1];
        !            76:        FP(l1,l0);
        !            77:        l2c(l0,out);
        !            78:        l2c(l1,out);
        !            79:        }