390 lines
12 KiB
C
390 lines
12 KiB
C
/* crypto/des/des_enc.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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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.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library 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 cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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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 DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
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{
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register DES_LONG l, r, t, u;
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#ifdef DES_PTR
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register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans;
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#endif
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#ifndef DES_UNROLL
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register int i;
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#endif
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register DES_LONG *s;
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r = data[0];
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l = data[1];
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IP(r, l);
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/*
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* Things have been modified so that the initial rotate is done outside
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* the loop. This required the DES_SPtrans values in sp.h to be rotated
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* 1 bit to the right. One perl script later and things have a 5% speed
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* up on a sparc2. Thanks to Richard Outerbridge
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* <71755.204@CompuServe.COM> for pointing this out.
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*/
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/* clear the top bits on machines with 8byte longs */
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/* shift left by 2 */
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r = ROTATE(r, 29) & 0xffffffffL;
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l = ROTATE(l, 29) & 0xffffffffL;
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s = ks->ks->deslong;
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/*
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* I don't know if it is worth the effort of loop unrolling the inner
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* loop
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*/
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if (enc) {
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#ifdef DES_UNROLL
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D_ENCRYPT(l, r, 0); /* 1 */
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D_ENCRYPT(r, l, 2); /* 2 */
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D_ENCRYPT(l, r, 4); /* 3 */
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D_ENCRYPT(r, l, 6); /* 4 */
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D_ENCRYPT(l, r, 8); /* 5 */
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D_ENCRYPT(r, l, 10); /* 6 */
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D_ENCRYPT(l, r, 12); /* 7 */
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D_ENCRYPT(r, l, 14); /* 8 */
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D_ENCRYPT(l, r, 16); /* 9 */
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D_ENCRYPT(r, l, 18); /* 10 */
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D_ENCRYPT(l, r, 20); /* 11 */
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D_ENCRYPT(r, l, 22); /* 12 */
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D_ENCRYPT(l, r, 24); /* 13 */
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D_ENCRYPT(r, l, 26); /* 14 */
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D_ENCRYPT(l, r, 28); /* 15 */
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D_ENCRYPT(r, l, 30); /* 16 */
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#else
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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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#endif
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} else {
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#ifdef DES_UNROLL
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D_ENCRYPT(l, r, 30); /* 16 */
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D_ENCRYPT(r, l, 28); /* 15 */
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D_ENCRYPT(l, r, 26); /* 14 */
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D_ENCRYPT(r, l, 24); /* 13 */
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D_ENCRYPT(l, r, 22); /* 12 */
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D_ENCRYPT(r, l, 20); /* 11 */
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D_ENCRYPT(l, r, 18); /* 10 */
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D_ENCRYPT(r, l, 16); /* 9 */
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D_ENCRYPT(l, r, 14); /* 8 */
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D_ENCRYPT(r, l, 12); /* 7 */
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D_ENCRYPT(l, r, 10); /* 6 */
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D_ENCRYPT(r, l, 8); /* 5 */
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D_ENCRYPT(l, r, 6); /* 4 */
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D_ENCRYPT(r, l, 4); /* 3 */
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D_ENCRYPT(l, r, 2); /* 2 */
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D_ENCRYPT(r, l, 0); /* 1 */
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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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#endif
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}
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/* rotate and clear the top bits on machines with 8byte longs */
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l = ROTATE(l, 3) & 0xffffffffL;
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r = ROTATE(r, 3) & 0xffffffffL;
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FP(r, l);
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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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void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
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{
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register DES_LONG l, r, t, u;
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#ifdef DES_PTR
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register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans;
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#endif
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#ifndef DES_UNROLL
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register int i;
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#endif
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register DES_LONG *s;
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r = data[0];
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l = data[1];
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/*
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* Things have been modified so that the initial rotate is done outside
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* the loop. This required the DES_SPtrans values in sp.h to be rotated
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* 1 bit to the right. One perl script later and things have a 5% speed
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* up on a sparc2. Thanks to Richard Outerbridge
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* <71755.204@CompuServe.COM> for pointing this out.
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*/
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/* clear the top bits on machines with 8byte longs */
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r = ROTATE(r, 29) & 0xffffffffL;
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l = ROTATE(l, 29) & 0xffffffffL;
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s = ks->ks->deslong;
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/*
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* I don't know if it is worth the effort of loop unrolling the inner
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* loop
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*/
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if (enc) {
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#ifdef DES_UNROLL
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D_ENCRYPT(l, r, 0); /* 1 */
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D_ENCRYPT(r, l, 2); /* 2 */
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D_ENCRYPT(l, r, 4); /* 3 */
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D_ENCRYPT(r, l, 6); /* 4 */
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D_ENCRYPT(l, r, 8); /* 5 */
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D_ENCRYPT(r, l, 10); /* 6 */
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D_ENCRYPT(l, r, 12); /* 7 */
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D_ENCRYPT(r, l, 14); /* 8 */
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D_ENCRYPT(l, r, 16); /* 9 */
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D_ENCRYPT(r, l, 18); /* 10 */
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D_ENCRYPT(l, r, 20); /* 11 */
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D_ENCRYPT(r, l, 22); /* 12 */
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D_ENCRYPT(l, r, 24); /* 13 */
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D_ENCRYPT(r, l, 26); /* 14 */
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D_ENCRYPT(l, r, 28); /* 15 */
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D_ENCRYPT(r, l, 30); /* 16 */
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#else
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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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#endif
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} else {
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#ifdef DES_UNROLL
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D_ENCRYPT(l, r, 30); /* 16 */
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D_ENCRYPT(r, l, 28); /* 15 */
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D_ENCRYPT(l, r, 26); /* 14 */
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D_ENCRYPT(r, l, 24); /* 13 */
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D_ENCRYPT(l, r, 22); /* 12 */
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D_ENCRYPT(r, l, 20); /* 11 */
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D_ENCRYPT(l, r, 18); /* 10 */
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D_ENCRYPT(r, l, 16); /* 9 */
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D_ENCRYPT(l, r, 14); /* 8 */
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D_ENCRYPT(r, l, 12); /* 7 */
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D_ENCRYPT(l, r, 10); /* 6 */
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D_ENCRYPT(r, l, 8); /* 5 */
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D_ENCRYPT(l, r, 6); /* 4 */
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D_ENCRYPT(r, l, 4); /* 3 */
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D_ENCRYPT(l, r, 2); /* 2 */
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D_ENCRYPT(r, l, 0); /* 1 */
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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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#endif
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}
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/* rotate and clear the top bits on machines with 8byte longs */
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data[0] = ROTATE(l, 3) & 0xffffffffL;
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data[1] = ROTATE(r, 3) & 0xffffffffL;
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l = r = t = u = 0;
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}
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void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,
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DES_key_schedule *ks2, DES_key_schedule *ks3)
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{
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register DES_LONG l, r;
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l = data[0];
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r = data[1];
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IP(l, r);
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data[0] = l;
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data[1] = r;
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DES_encrypt2((DES_LONG *)data, ks1, DES_ENCRYPT);
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DES_encrypt2((DES_LONG *)data, ks2, DES_DECRYPT);
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DES_encrypt2((DES_LONG *)data, ks3, DES_ENCRYPT);
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l = data[0];
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r = data[1];
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FP(r, l);
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data[0] = l;
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data[1] = r;
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}
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void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,
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DES_key_schedule *ks2, DES_key_schedule *ks3)
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{
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register DES_LONG l, r;
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l = data[0];
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r = data[1];
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IP(l, r);
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data[0] = l;
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data[1] = r;
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DES_encrypt2((DES_LONG *)data, ks3, DES_DECRYPT);
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DES_encrypt2((DES_LONG *)data, ks2, DES_ENCRYPT);
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DES_encrypt2((DES_LONG *)data, ks1, DES_DECRYPT);
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l = data[0];
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r = data[1];
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FP(r, l);
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data[0] = l;
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data[1] = r;
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}
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#ifndef DES_DEFAULT_OPTIONS
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# undef CBC_ENC_C__DONT_UPDATE_IV
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# include "ncbc_enc.c" /* DES_ncbc_encrypt */
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void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
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long length, DES_key_schedule *ks1,
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DES_key_schedule *ks2, DES_key_schedule *ks3,
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DES_cblock *ivec, int enc)
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{
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register DES_LONG tin0, tin1;
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register DES_LONG tout0, tout1, xor0, xor1;
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register const unsigned char *in;
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unsigned char *out;
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register long l = length;
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DES_LONG tin[2];
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unsigned char *iv;
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in = input;
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out = output;
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iv = &(*ivec)[0];
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if (enc) {
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c2l(iv, tout0);
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c2l(iv, tout1);
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for (l -= 8; l >= 0; l -= 8) {
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c2l(in, tin0);
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c2l(in, tin1);
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tin0 ^= tout0;
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tin1 ^= tout1;
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tin[0] = tin0;
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tin[1] = tin1;
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DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3);
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tout0 = tin[0];
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tout1 = tin[1];
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l2c(tout0, out);
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l2c(tout1, out);
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}
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if (l != -8) {
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c2ln(in, tin0, tin1, l + 8);
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tin0 ^= tout0;
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tin1 ^= tout1;
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tin[0] = tin0;
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tin[1] = tin1;
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DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3);
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tout0 = tin[0];
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tout1 = tin[1];
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l2c(tout0, out);
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l2c(tout1, out);
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}
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iv = &(*ivec)[0];
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l2c(tout0, iv);
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l2c(tout1, iv);
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} else {
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register DES_LONG t0, t1;
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c2l(iv, xor0);
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c2l(iv, xor1);
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for (l -= 8; l >= 0; l -= 8) {
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c2l(in, tin0);
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c2l(in, tin1);
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t0 = tin0;
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t1 = tin1;
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tin[0] = tin0;
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tin[1] = tin1;
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DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3);
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tout0 = tin[0];
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tout1 = tin[1];
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tout0 ^= xor0;
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tout1 ^= xor1;
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l2c(tout0, out);
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l2c(tout1, out);
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xor0 = t0;
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xor1 = t1;
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}
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if (l != -8) {
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c2l(in, tin0);
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c2l(in, tin1);
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t0 = tin0;
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t1 = tin1;
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tin[0] = tin0;
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tin[1] = tin1;
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DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3);
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tout0 = tin[0];
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tout1 = tin[1];
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tout0 ^= xor0;
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tout1 ^= xor1;
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l2cn(tout0, tout1, out, l + 8);
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xor0 = t0;
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xor1 = t1;
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}
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iv = &(*ivec)[0];
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l2c(xor0, iv);
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l2c(xor1, iv);
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}
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tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
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tin[0] = tin[1] = 0;
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}
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#endif /* DES_DEFAULT_OPTIONS */
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