103 lines
3.8 KiB
C
103 lines
3.8 KiB
C
/* $OpenBSD: ecb_enc.c,v 1.6 2015/12/10 21:00:51 naddy Exp $ */
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/* lib/des/ecb_enc.c */
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/* Copyright (C) 1995 Eric Young (eay@mincom.oz.au)
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* All rights reserved.
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*
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* This file is part of an SSL implementation written
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* by Eric Young (eay@mincom.oz.au).
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* The implementation was written so as to conform with Netscapes SSL
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* specification. This library and applications are
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* FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
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* as long as the following conditions are aheared to.
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed. If this code is used in a product,
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* Eric Young should be given attribution as the author of the parts used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Eric Young (eay@mincom.oz.au)
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include "des_locl.h"
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#include "spr.h"
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void
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des_encrypt2(u_int32_t *data, des_key_schedule ks, int encrypt)
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{
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register u_int32_t l, r, t, u;
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#ifdef DES_USE_PTR
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register unsigned char *des_SP=(unsigned char *)des_SPtrans;
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#endif
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register int i;
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register u_int32_t *s;
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u = data[0];
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r = data[1];
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/* Things have been modified so that the initial rotate is
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* done outside the loop. This required the
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* des_SPtrans values in sp.h to be rotated 1 bit to the right.
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* One perl script later and things have a 5% speed up on a sparc2.
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* Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
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* for pointing this out. */
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l = (r << 1) | (r >> 31);
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r = (u << 1) | (u >> 31);
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/* clear the top bits on machines with 8byte longs */
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l &= 0xffffffffL;
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r &= 0xffffffffL;
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s = (u_int32_t *) ks;
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/* I don't know if it is worth the effort of loop unrolling the
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* inner loop */
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if (encrypt) {
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for (i = 0; i < 32; i += 4) {
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D_ENCRYPT(l, r, i + 0); /* 1 */
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D_ENCRYPT(r, l, i + 2); /* 2 */
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}
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} else {
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for (i = 30; i > 0; i -= 4) {
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D_ENCRYPT(l, r, i - 0); /* 16 */
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D_ENCRYPT(r, l, i - 2); /* 15 */
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}
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}
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l = (l >> 1) | (l << 31);
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r = (r >> 1) | (r << 31);
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/* clear the top bits on machines with 8byte longs */
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l &= 0xffffffffL;
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r &= 0xffffffffL;
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data[0] = l;
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data[1] = r;
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l = r = t = u = 0;
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}
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