/src/netbsd/src/sys/crypto/des/des_enc.c
C | 294 lines | 199 code | 17 blank | 78 comment | 6 complexity | bb692869fd7077a83536d83abd11f9d8 MD5 | raw file
Possible License(s): CC0-1.0, MIT, LGPL-2.0, LGPL-3.0, WTFPL, GPL-2.0, BSD-2-Clause, AGPL-3.0, CC-BY-SA-3.0, MPL-2.0, JSON, BSD-3-Clause-No-Nuclear-License-2014, LGPL-2.1, CPL-1.0, AGPL-1.0, 0BSD, ISC, Apache-2.0, GPL-3.0, IPL-1.0, MPL-2.0-no-copyleft-exception, BSD-3-Clause
- /* crypto/des/des_enc.c */
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 THE AUTHOR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
- #include <sys/cdefs.h>
- __KERNEL_RCSID(0, "$NetBSD: des_enc.c,v 1.4 2005/12/11 12:20:52 christos Exp $");
- #include <sys/types.h>
- #include <crypto/des/des_locl.h>
- extern const DES_LONG des_SPtrans[8][64];
- void des_encrypt1(DES_LONG *data, des_key_schedule ks, int enc)
- {
- register DES_LONG l,r,t,u;
- #ifdef DES_PTR
- register const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
- #endif
- #ifndef DES_UNROLL
- register int i;
- #endif
- register DES_LONG *s;
- r=data[0];
- l=data[1];
- IP(r,l);
- /* Things have been modified so that the initial rotate is
- * done outside the loop. This required the
- * des_SPtrans values in sp.h to be rotated 1 bit to the right.
- * One perl script later and things have a 5% speed up on a sparc2.
- * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
- * for pointing this out. */
- /* clear the top bits on machines with 8byte longs */
- /* shift left by 2 */
- r=ROTATE(r,29)&0xffffffffL;
- l=ROTATE(l,29)&0xffffffffL;
- s=ks->ks.deslong;
- /* I don't know if it is worth the effort of loop unrolling the
- * inner loop */
- if (enc)
- {
- #ifdef DES_UNROLL
- D_ENCRYPT(l,r, 0); /* 1 */
- D_ENCRYPT(r,l, 2); /* 2 */
- D_ENCRYPT(l,r, 4); /* 3 */
- D_ENCRYPT(r,l, 6); /* 4 */
- D_ENCRYPT(l,r, 8); /* 5 */
- D_ENCRYPT(r,l,10); /* 6 */
- D_ENCRYPT(l,r,12); /* 7 */
- D_ENCRYPT(r,l,14); /* 8 */
- D_ENCRYPT(l,r,16); /* 9 */
- D_ENCRYPT(r,l,18); /* 10 */
- D_ENCRYPT(l,r,20); /* 11 */
- D_ENCRYPT(r,l,22); /* 12 */
- D_ENCRYPT(l,r,24); /* 13 */
- D_ENCRYPT(r,l,26); /* 14 */
- D_ENCRYPT(l,r,28); /* 15 */
- D_ENCRYPT(r,l,30); /* 16 */
- #else
- for (i=0; i<32; i+=8)
- {
- D_ENCRYPT(l,r,i+0); /* 1 */
- D_ENCRYPT(r,l,i+2); /* 2 */
- D_ENCRYPT(l,r,i+4); /* 3 */
- D_ENCRYPT(r,l,i+6); /* 4 */
- }
- #endif
- }
- else
- {
- #ifdef DES_UNROLL
- D_ENCRYPT(l,r,30); /* 16 */
- D_ENCRYPT(r,l,28); /* 15 */
- D_ENCRYPT(l,r,26); /* 14 */
- D_ENCRYPT(r,l,24); /* 13 */
- D_ENCRYPT(l,r,22); /* 12 */
- D_ENCRYPT(r,l,20); /* 11 */
- D_ENCRYPT(l,r,18); /* 10 */
- D_ENCRYPT(r,l,16); /* 9 */
- D_ENCRYPT(l,r,14); /* 8 */
- D_ENCRYPT(r,l,12); /* 7 */
- D_ENCRYPT(l,r,10); /* 6 */
- D_ENCRYPT(r,l, 8); /* 5 */
- D_ENCRYPT(l,r, 6); /* 4 */
- D_ENCRYPT(r,l, 4); /* 3 */
- D_ENCRYPT(l,r, 2); /* 2 */
- D_ENCRYPT(r,l, 0); /* 1 */
- #else
- for (i=30; i>0; i-=8)
- {
- D_ENCRYPT(l,r,i-0); /* 16 */
- D_ENCRYPT(r,l,i-2); /* 15 */
- D_ENCRYPT(l,r,i-4); /* 14 */
- D_ENCRYPT(r,l,i-6); /* 13 */
- }
- #endif
- }
- /* rotate and clear the top bits on machines with 8byte longs */
- l=ROTATE(l,3)&0xffffffffL;
- r=ROTATE(r,3)&0xffffffffL;
- FP(r,l);
- data[0]=l;
- data[1]=r;
- l=r=t=u=0;
- }
- void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc)
- {
- register DES_LONG l,r,t,u;
- #ifdef DES_PTR
- register const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
- #endif
- #ifndef DES_UNROLL
- register int i;
- #endif
- register DES_LONG *s;
- r=data[0];
- l=data[1];
- /* Things have been modified so that the initial rotate is
- * done outside the loop. This required the
- * des_SPtrans values in sp.h to be rotated 1 bit to the right.
- * One perl script later and things have a 5% speed up on a sparc2.
- * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
- * for pointing this out. */
- /* clear the top bits on machines with 8byte longs */
- r=ROTATE(r,29)&0xffffffffL;
- l=ROTATE(l,29)&0xffffffffL;
- s=ks->ks.deslong;
- /* I don't know if it is worth the effort of loop unrolling the
- * inner loop */
- if (enc)
- {
- #ifdef DES_UNROLL
- D_ENCRYPT(l,r, 0); /* 1 */
- D_ENCRYPT(r,l, 2); /* 2 */
- D_ENCRYPT(l,r, 4); /* 3 */
- D_ENCRYPT(r,l, 6); /* 4 */
- D_ENCRYPT(l,r, 8); /* 5 */
- D_ENCRYPT(r,l,10); /* 6 */
- D_ENCRYPT(l,r,12); /* 7 */
- D_ENCRYPT(r,l,14); /* 8 */
- D_ENCRYPT(l,r,16); /* 9 */
- D_ENCRYPT(r,l,18); /* 10 */
- D_ENCRYPT(l,r,20); /* 11 */
- D_ENCRYPT(r,l,22); /* 12 */
- D_ENCRYPT(l,r,24); /* 13 */
- D_ENCRYPT(r,l,26); /* 14 */
- D_ENCRYPT(l,r,28); /* 15 */
- D_ENCRYPT(r,l,30); /* 16 */
- #else
- for (i=0; i<32; i+=8)
- {
- D_ENCRYPT(l,r,i+0); /* 1 */
- D_ENCRYPT(r,l,i+2); /* 2 */
- D_ENCRYPT(l,r,i+4); /* 3 */
- D_ENCRYPT(r,l,i+6); /* 4 */
- }
- #endif
- }
- else
- {
- #ifdef DES_UNROLL
- D_ENCRYPT(l,r,30); /* 16 */
- D_ENCRYPT(r,l,28); /* 15 */
- D_ENCRYPT(l,r,26); /* 14 */
- D_ENCRYPT(r,l,24); /* 13 */
- D_ENCRYPT(l,r,22); /* 12 */
- D_ENCRYPT(r,l,20); /* 11 */
- D_ENCRYPT(l,r,18); /* 10 */
- D_ENCRYPT(r,l,16); /* 9 */
- D_ENCRYPT(l,r,14); /* 8 */
- D_ENCRYPT(r,l,12); /* 7 */
- D_ENCRYPT(l,r,10); /* 6 */
- D_ENCRYPT(r,l, 8); /* 5 */
- D_ENCRYPT(l,r, 6); /* 4 */
- D_ENCRYPT(r,l, 4); /* 3 */
- D_ENCRYPT(l,r, 2); /* 2 */
- D_ENCRYPT(r,l, 0); /* 1 */
- #else
- for (i=30; i>0; i-=8)
- {
- D_ENCRYPT(l,r,i-0); /* 16 */
- D_ENCRYPT(r,l,i-2); /* 15 */
- D_ENCRYPT(l,r,i-4); /* 14 */
- D_ENCRYPT(r,l,i-6); /* 13 */
- }
- #endif
- }
- /* rotate and clear the top bits on machines with 8byte longs */
- data[0]=ROTATE(l,3)&0xffffffffL;
- data[1]=ROTATE(r,3)&0xffffffffL;
- l=r=t=u=0;
- }
- void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
- des_key_schedule ks3)
- {
- register DES_LONG l,r;
- l=data[0];
- r=data[1];
- IP(l,r);
- data[0]=l;
- data[1]=r;
- des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
- des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
- des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
- l=data[0];
- r=data[1];
- FP(r,l);
- data[0]=l;
- data[1]=r;
- }
- void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
- des_key_schedule ks3)
- {
- register DES_LONG l,r;
- l=data[0];
- r=data[1];
- IP(l,r);
- data[0]=l;
- data[1]=r;
- des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
- des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
- des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
- l=data[0];
- r=data[1];
- FP(r,l);
- data[0]=l;
- data[1]=r;
- }