1 /* crypto/des/des_enc.c */
\r/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
\r * All rights reserved.
\r *
\r * This package is an SSL implementation written
\r * by Eric Young (eay@mincom.oz.au).
\r * The implementation was written so as to conform with Netscapes SSL.
\r *
\r * This library is free for commercial and non-commercial use as long as
\r * the following conditions are aheared to. The following conditions
\r * apply to all code found in this distribution, be it the RC4, RSA,
\r * lhash, DES, etc., code; not just the SSL code. The SSL documentation
\r * included with this distribution is covered by the same copyright terms
\r * except that the holder is Tim Hudson (tjh@mincom.oz.au).
\r *
\r * Copyright remains Eric Young's, and as such any Copyright notices in
\r * the code are not to be removed.
\r * If this package is used in a product, Eric Young should be given attribution
\r * as the author of the parts of the library used.
\r * This can be in the form of a textual message at program startup or
\r * in documentation (online or textual) provided with the package.
\r *
\r * Redistribution and use in source and binary forms, with or without
\r * modification, are permitted provided that the following conditions
\r * are met:
\r * 1. Redistributions of source code must retain the copyright
\r * notice, this list of conditions and the following disclaimer.
\r * 2. Redistributions in binary form must reproduce the above copyright
\r * notice, this list of conditions and the following disclaimer in the
\r * documentation and/or other materials provided with the distribution.
\r * 3. All advertising materials mentioning features or use of this software
\r * must display the following acknowledgement:
\r * "This product includes cryptographic software written by
\r * Eric Young (eay@mincom.oz.au)"
\r * The word 'cryptographic' can be left out if the rouines from the library
\r * being used are not cryptographic related :-).
\r * 4. If you include any Windows specific code (or a derivative thereof) from
\r * the apps directory (application code) you must include an acknowledgement:
\r * "This product includes software written by Tim Hudson (tjh@mincom.oz.au)"
\r *
\r * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
\r * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
\r * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
\r * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
\r * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
\r * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
\r * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
\r * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
\r * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
\r * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
\r * SUCH DAMAGE.
\r *
\r * The licence and distribution terms for any publically available version or
\r * derivative of this code cannot be changed. i.e. this code cannot simply be
\r * copied and put under another distribution licence
\r * [including the GNU Public Licence.]
\r */
\r\r#include "des_locl.h"
\r\rvoid des_encrypt(data, ks, encrypt)
\rDES_LONG *data;
\rdes_key_schedule ks;
\rint encrypt;
\r {
\r register DES_LONG l,r,t,u;
\r#ifdef DES_PTR
\r register unsigned char *des_SP=(unsigned char *)des_SPtrans;
\r#endif
\r#ifndef DES_UNROLL
\r register int i;
\r#endif
\r register DES_LONG *s;
\r\r r=data[0];
\r l=data[1];
\r\r IP(r,l);
\r /* Things have been modified so that the initial rotate is
\r * done outside the loop. This required the
\r * des_SPtrans values in sp.h to be rotated 1 bit to the right.
\r * One perl script later and things have a 5% speed up on a sparc2.
\r * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
\r * for pointing this out. */
\r /* clear the top bits on machines with 8byte longs */
\r /* shift left by 2 */
\r r=ROTATE(r,29)&0xffffffffL;
\r l=ROTATE(l,29)&0xffffffffL;
\r\r s=(DES_LONG *)ks;
\r /* I don't know if it is worth the effort of loop unrolling the
\r * inner loop */
\r if (encrypt)
\r {
\r#ifdef DES_UNROLL
\r D_ENCRYPT(l,r, 0); /* 1 */
\r D_ENCRYPT(r,l, 2); /* 2 */
\r D_ENCRYPT(l,r, 4); /* 3 */
\r D_ENCRYPT(r,l, 6); /* 4 */
\r D_ENCRYPT(l,r, 8); /* 5 */
\r D_ENCRYPT(r,l,10); /* 6 */
\r D_ENCRYPT(l,r,12); /* 7 */
\r D_ENCRYPT(r,l,14); /* 8 */
\r D_ENCRYPT(l,r,16); /* 9 */
\r D_ENCRYPT(r,l,18); /* 10 */
\r D_ENCRYPT(l,r,20); /* 11 */
\r D_ENCRYPT(r,l,22); /* 12 */
\r D_ENCRYPT(l,r,24); /* 13 */
\r D_ENCRYPT(r,l,26); /* 14 */
\r D_ENCRYPT(l,r,28); /* 15 */
\r D_ENCRYPT(r,l,30); /* 16 */
\r#else
\r for (i=0; i<32; i+=8)
\r {
\r D_ENCRYPT(l,r,i+0); /* 1 */
\r D_ENCRYPT(r,l,i+2); /* 2 */
\r D_ENCRYPT(l,r,i+4); /* 3 */
\r D_ENCRYPT(r,l,i+6); /* 4 */
\r }
\r#endif
\r }
\r else
\r {
\r#ifdef DES_UNROLL
\r D_ENCRYPT(l,r,30); /* 16 */
\r D_ENCRYPT(r,l,28); /* 15 */
\r D_ENCRYPT(l,r,26); /* 14 */
\r D_ENCRYPT(r,l,24); /* 13 */
\r D_ENCRYPT(l,r,22); /* 12 */
\r D_ENCRYPT(r,l,20); /* 11 */
\r D_ENCRYPT(l,r,18); /* 10 */
\r D_ENCRYPT(r,l,16); /* 9 */
\r D_ENCRYPT(l,r,14); /* 8 */
\r D_ENCRYPT(r,l,12); /* 7 */
\r D_ENCRYPT(l,r,10); /* 6 */
\r D_ENCRYPT(r,l, 8); /* 5 */
\r D_ENCRYPT(l,r, 6); /* 4 */
\r D_ENCRYPT(r,l, 4); /* 3 */
\r D_ENCRYPT(l,r, 2); /* 2 */
\r D_ENCRYPT(r,l, 0); /* 1 */
\r#else
\r for (i=30; i>0; i-=8)
\r {
\r D_ENCRYPT(l,r,i-0); /* 16 */
\r D_ENCRYPT(r,l,i-2); /* 15 */
\r D_ENCRYPT(l,r,i-4); /* 14 */
\r D_ENCRYPT(r,l,i-6); /* 13 */
\r }
\r#endif
\r }
\r\r /* rotate and clear the top bits on machines with 8byte longs */
\r l=ROTATE(l,3)&0xffffffffL;
\r r=ROTATE(r,3)&0xffffffffL;
\r\r FP(r,l);
\r data[0]=l;
\r data[1]=r;
\r l=r=t=u=0;
\r }
\r\rvoid des_encrypt2(data, ks, encrypt)
\rDES_LONG *data;
\rdes_key_schedule ks;
\rint encrypt;
\r {
\r register DES_LONG l,r,t,u;
\r#ifdef DES_PTR
\r register unsigned char *des_SP=(unsigned char *)des_SPtrans;
\r#endif
\r#ifndef DES_UNROLL
\r register int i;
\r#endif
\r register DES_LONG *s;
\r\r r=data[0];
\r l=data[1];
\r\r /* Things have been modified so that the initial rotate is
\r * done outside the loop. This required the
\r * des_SPtrans values in sp.h to be rotated 1 bit to the right.
\r * One perl script later and things have a 5% speed up on a sparc2.
\r * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
\r * for pointing this out. */
\r /* clear the top bits on machines with 8byte longs */
\r r=ROTATE(r,29)&0xffffffff;
\r l=ROTATE(l,29)&0xffffffff;
\r\r s=(DES_LONG *)ks;
\r /* I don't know if it is worth the effort of loop unrolling the
\r * inner loop */
\r if (encrypt)
\r {
\r#ifdef DES_UNROLL
\r D_ENCRYPT(l,r, 0); /* 1 */
\r D_ENCRYPT(r,l, 2); /* 2 */
\r D_ENCRYPT(l,r, 4); /* 3 */
\r D_ENCRYPT(r,l, 6); /* 4 */
\r D_ENCRYPT(l,r, 8); /* 5 */
\r D_ENCRYPT(r,l,10); /* 6 */
\r D_ENCRYPT(l,r,12); /* 7 */
\r D_ENCRYPT(r,l,14); /* 8 */
\r D_ENCRYPT(l,r,16); /* 9 */
\r D_ENCRYPT(r,l,18); /* 10 */
\r D_ENCRYPT(l,r,20); /* 11 */
\r D_ENCRYPT(r,l,22); /* 12 */
\r D_ENCRYPT(l,r,24); /* 13 */
\r D_ENCRYPT(r,l,26); /* 14 */
\r D_ENCRYPT(l,r,28); /* 15 */
\r D_ENCRYPT(r,l,30); /* 16 */
\r#else
\r for (i=0; i<32; i+=8)
\r {
\r D_ENCRYPT(l,r,i+0); /* 1 */
\r D_ENCRYPT(r,l,i+2); /* 2 */
\r D_ENCRYPT(l,r,i+4); /* 3 */
\r D_ENCRYPT(r,l,i+6); /* 4 */
\r }
\r#endif
\r }
\r else
\r {
\r#ifdef DES_UNROLL
\r D_ENCRYPT(l,r,30); /* 16 */
\r D_ENCRYPT(r,l,28); /* 15 */
\r D_ENCRYPT(l,r,26); /* 14 */
\r D_ENCRYPT(r,l,24); /* 13 */
\r D_ENCRYPT(l,r,22); /* 12 */
\r D_ENCRYPT(r,l,20); /* 11 */
\r D_ENCRYPT(l,r,18); /* 10 */
\r D_ENCRYPT(r,l,16); /* 9 */
\r D_ENCRYPT(l,r,14); /* 8 */
\r D_ENCRYPT(r,l,12); /* 7 */
\r D_ENCRYPT(l,r,10); /* 6 */
\r D_ENCRYPT(r,l, 8); /* 5 */
\r D_ENCRYPT(l,r, 6); /* 4 */
\r D_ENCRYPT(r,l, 4); /* 3 */
\r D_ENCRYPT(l,r, 2); /* 2 */
\r D_ENCRYPT(r,l, 0); /* 1 */
\r#else
\r for (i=30; i>0; i-=8)
\r {
\r D_ENCRYPT(l,r,i-0); /* 16 */
\r D_ENCRYPT(r,l,i-2); /* 15 */
\r D_ENCRYPT(l,r,i-4); /* 14 */
\r D_ENCRYPT(r,l,i-6); /* 13 */
\r }
\r#endif
\r }
\r /* rotate and clear the top bits on machines with 8byte longs */
\r data[0]=ROTATE(l,3)&0xffffffff;
\r data[1]=ROTATE(r,3)&0xffffffff;
\r l=r=t=u=0;
\r }
\r\rvoid des_encrypt3(data,ks1,ks2,ks3)
\rDES_LONG *data;
\rdes_key_schedule ks1;
\rdes_key_schedule ks2;
\rdes_key_schedule ks3;
\r {
\r register DES_LONG l,r;
\r\r l=data[0];
\r r=data[1];
\r IP(l,r);
\r data[0]=l;
\r data[1]=r;
\r des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
\r des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
\r des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
\r l=data[0];
\r r=data[1];
\r FP(r,l);
\r data[0]=l;
\r data[1]=r;
\r }
\r\rvoid des_decrypt3(data,ks1,ks2,ks3)
\rDES_LONG *data;
\rdes_key_schedule ks1;
\rdes_key_schedule ks2;
\rdes_key_schedule ks3;
\r {
\r register DES_LONG l,r;
\r\r l=data[0];
\r r=data[1];
\r IP(l,r);
\r data[0]=l;
\r data[1]=r;
\r des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
\r des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
\r des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
\r l=data[0];
\r r=data[1];
\r FP(r,l);
\r data[0]=l;
\r data[1]=r;
\r }
\r\r
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