Annotation of sys/crypto/ecb_enc.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ecb_enc.c,v 1.3 2005/06/13 10:56:44 hshoexer Exp $ */
! 2:
! 3: /* lib/des/ecb_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: #include "spr.h"
! 52:
! 53: const char *DES_version="libdes v 3.21 - 95/11/21 - eay";
! 54:
! 55: void des_ecb_encrypt(input, output, ks, encrypt)
! 56: des_cblock (*input);
! 57: des_cblock (*output);
! 58: des_key_schedule ks;
! 59: int encrypt;
! 60: {
! 61: register u_int32_t l0,l1;
! 62: register unsigned char *in,*out;
! 63: u_int32_t ll[2];
! 64:
! 65: in=(unsigned char *)input;
! 66: out=(unsigned char *)output;
! 67: c2l(in,l0); ll[0]=l0;
! 68: c2l(in,l1); ll[1]=l1;
! 69: des_encrypt(ll,ks,encrypt);
! 70: l0=ll[0]; l2c(l0,out);
! 71: l1=ll[1]; l2c(l1,out);
! 72: l0=l1=ll[0]=ll[1]=0;
! 73: }
! 74:
! 75: void des_encrypt(data, ks, encrypt)
! 76: u_int32_t *data;
! 77: des_key_schedule ks;
! 78: int encrypt;
! 79: {
! 80: register u_int32_t l,r,t,u;
! 81: #ifdef DES_USE_PTR
! 82: register unsigned char *des_SP=(unsigned char *)des_SPtrans;
! 83: #endif
! 84: register int i;
! 85: register u_int32_t *s;
! 86:
! 87: u=data[0];
! 88: r=data[1];
! 89:
! 90: IP(u,r);
! 91: /* Things have been modified so that the initial rotate is
! 92: * done outside the loop. This required the
! 93: * des_SPtrans values in sp.h to be rotated 1 bit to the right.
! 94: * One perl script later and things have a 5% speed up on a sparc2.
! 95: * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
! 96: * for pointing this out. */
! 97: l=(r<<1)|(r>>31);
! 98: r=(u<<1)|(u>>31);
! 99:
! 100: /* clear the top bits on machines with 8byte longs */
! 101: l&=0xffffffffL;
! 102: r&=0xffffffffL;
! 103:
! 104: s=(u_int32_t *)ks;
! 105: /* I don't know if it is worth the effort of loop unrolling the
! 106: * inner loop */
! 107: if (encrypt)
! 108: {
! 109: for (i=0; i<32; i+=4)
! 110: {
! 111: D_ENCRYPT(l,r,i+0); /* 1 */
! 112: D_ENCRYPT(r,l,i+2); /* 2 */
! 113: }
! 114: }
! 115: else
! 116: {
! 117: for (i=30; i>0; i-=4)
! 118: {
! 119: D_ENCRYPT(l,r,i-0); /* 16 */
! 120: D_ENCRYPT(r,l,i-2); /* 15 */
! 121: }
! 122: }
! 123: l=(l>>1)|(l<<31);
! 124: r=(r>>1)|(r<<31);
! 125: /* clear the top bits on machines with 8byte longs */
! 126: l&=0xffffffffL;
! 127: r&=0xffffffffL;
! 128:
! 129: FP(r,l);
! 130: data[0]=l;
! 131: data[1]=r;
! 132: l=r=t=u=0;
! 133: }
! 134:
! 135: void des_encrypt2(data, ks, encrypt)
! 136: u_int32_t *data;
! 137: des_key_schedule ks;
! 138: int encrypt;
! 139: {
! 140: register u_int32_t l,r,t,u;
! 141: #ifdef DES_USE_PTR
! 142: register unsigned char *des_SP=(unsigned char *)des_SPtrans;
! 143: #endif
! 144: register int i;
! 145: register u_int32_t *s;
! 146:
! 147: u=data[0];
! 148: r=data[1];
! 149:
! 150: /* Things have been modified so that the initial rotate is
! 151: * done outside the loop. This required the
! 152: * des_SPtrans values in sp.h to be rotated 1 bit to the right.
! 153: * One perl script later and things have a 5% speed up on a sparc2.
! 154: * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
! 155: * for pointing this out. */
! 156: l=(r<<1)|(r>>31);
! 157: r=(u<<1)|(u>>31);
! 158:
! 159: /* clear the top bits on machines with 8byte longs */
! 160: l&=0xffffffffL;
! 161: r&=0xffffffffL;
! 162:
! 163: s=(u_int32_t *)ks;
! 164: /* I don't know if it is worth the effort of loop unrolling the
! 165: * inner loop */
! 166: if (encrypt)
! 167: {
! 168: for (i=0; i<32; i+=4)
! 169: {
! 170: D_ENCRYPT(l,r,i+0); /* 1 */
! 171: D_ENCRYPT(r,l,i+2); /* 2 */
! 172: }
! 173: }
! 174: else
! 175: {
! 176: for (i=30; i>0; i-=4)
! 177: {
! 178: D_ENCRYPT(l,r,i-0); /* 16 */
! 179: D_ENCRYPT(r,l,i-2); /* 15 */
! 180: }
! 181: }
! 182: l=(l>>1)|(l<<31);
! 183: r=(r>>1)|(r<<31);
! 184: /* clear the top bits on machines with 8byte longs */
! 185: l&=0xffffffffL;
! 186: r&=0xffffffffL;
! 187:
! 188: data[0]=l;
! 189: data[1]=r;
! 190: l=r=t=u=0;
! 191: }
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