des_ecb.c revision 1.3
1 /* $NetBSD: des_ecb.c,v 1.3 2000/11/06 14:11:41 itojun Exp $ */ 2 /* $KAME: des_ecb.c,v 1.5 2000/11/06 13:58:08 itojun Exp $ */ 3 4 /* crypto/des/ecb_enc.c */ 5 /* Copyright (C) 1995-1996 Eric Young (eay (at) mincom.oz.au) 6 * All rights reserved. 7 * 8 * This file is part of an SSL implementation written 9 * by Eric Young (eay (at) mincom.oz.au). 10 * The implementation was written so as to conform with Netscapes SSL 11 * specification. This library and applications are 12 * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE 13 * as long as the following conditions are aheared to. 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. If this code is used in a product, 17 * Eric Young should be given attribution as the author of the parts used. 18 * This can be in the form of a textual message at program startup or 19 * in documentation (online or textual) provided with the package. 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 3. All advertising materials mentioning features or use of this software 30 * must display the following acknowledgement: 31 * This product includes software developed by Eric Young (eay (at) mincom.oz.au) 32 * 33 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 36 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 43 * SUCH DAMAGE. 44 * 45 * The licence and distribution terms for any publically available version or 46 * derivative of this code cannot be changed. i.e. this code cannot simply be 47 * copied and put under another distribution licence 48 * [including the GNU Public Licence.] 49 */ 50 51 #include <sys/param.h> 52 #ifdef _KERNEL 53 #include <sys/systm.h> 54 #else 55 #include <string.h> 56 #endif 57 #include <crypto/des/des_locl.h> 58 #include <crypto/des/spr.h> 59 60 char *libdes_version="libdes v 3.24 - 20-Apr-1996 - eay"; 61 char *DES_version="DES part of SSLeay 0.6.4 30-Aug-1996"; 62 63 char *des_options() 64 { 65 #ifdef DES_PTR 66 if (sizeof(DES_LONG) != sizeof(long)) 67 return("des(ptr,int)"); 68 else 69 return("des(ptr,long)"); 70 #else 71 if (sizeof(DES_LONG) != sizeof(long)) 72 return("des(idx,int)"); 73 else 74 return("des(idx,long)"); 75 #endif 76 } 77 78 79 void des_ecb_encrypt(input, output, ks, encrypt) 80 des_cblock (*input); 81 des_cblock (*output); 82 des_key_schedule ks; 83 int encrypt; 84 { 85 register DES_LONG l; 86 register unsigned char *in,*out; 87 DES_LONG ll[2]; 88 89 in=(unsigned char *)input; 90 out=(unsigned char *)output; 91 c2l(in,l); ll[0]=l; 92 c2l(in,l); ll[1]=l; 93 des_encrypt(ll,ks,encrypt); 94 l=ll[0]; l2c(l,out); 95 l=ll[1]; l2c(l,out); 96 l=ll[0]=ll[1]=0; 97 } 98 99 void des_encrypt(data, ks, encrypt) 100 DES_LONG *data; 101 des_key_schedule ks; 102 int encrypt; 103 { 104 register DES_LONG l,r,t,u; 105 #ifdef DES_PTR 106 register unsigned char *des_SP=(unsigned char *)des_SPtrans; 107 #endif 108 #ifdef undef 109 union fudge { 110 DES_LONG l; 111 unsigned short s[2]; 112 unsigned char c[4]; 113 } U,T; 114 #endif 115 register int i; 116 register DES_LONG *s; 117 118 u=data[0]; 119 r=data[1]; 120 121 IP(u,r); 122 /* Things have been modified so that the initial rotate is 123 * done outside the loop. This required the 124 * des_SPtrans values in sp.h to be rotated 1 bit to the right. 125 * One perl script later and things have a 5% speed up on a sparc2. 126 * Thanks to Richard Outerbridge <71755.204 (at) CompuServe.COM> 127 * for pointing this out. */ 128 l=(r<<1)|(r>>31); 129 r=(u<<1)|(u>>31); 130 131 /* clear the top bits on machines with 8byte longs */ 132 l&=0xffffffffL; 133 r&=0xffffffffL; 134 135 s=(DES_LONG *)ks; 136 /* I don't know if it is worth the effort of loop unrolling the 137 * inner loop 138 */ 139 if (encrypt) 140 { 141 for (i=0; i<32; i+=8) 142 { 143 D_ENCRYPT(l,r,i+0); /* 1 */ 144 D_ENCRYPT(r,l,i+2); /* 2 */ 145 D_ENCRYPT(l,r,i+4); /* 3 */ 146 D_ENCRYPT(r,l,i+6); /* 4 */ 147 } 148 } 149 else 150 { 151 for (i=30; i>0; i-=8) 152 { 153 D_ENCRYPT(l,r,i-0); /* 16 */ 154 D_ENCRYPT(r,l,i-2); /* 15 */ 155 D_ENCRYPT(l,r,i-4); /* 14 */ 156 D_ENCRYPT(r,l,i-6); /* 13 */ 157 } 158 } 159 l=(l>>1)|(l<<31); 160 r=(r>>1)|(r<<31); 161 /* clear the top bits on machines with 8byte longs */ 162 l&=0xffffffffL; 163 r&=0xffffffffL; 164 165 FP(r,l); 166 data[0]=l; 167 data[1]=r; 168 l=r=t=u=0; 169 } 170 171 void des_encrypt2(data, ks, encrypt) 172 DES_LONG *data; 173 des_key_schedule ks; 174 int encrypt; 175 { 176 register DES_LONG l,r,t,u; 177 #ifdef DES_PTR 178 register unsigned char *des_SP=(unsigned char *)des_SPtrans; 179 #endif 180 #ifdef undef 181 union fudge { 182 DES_LONG l; 183 unsigned short s[2]; 184 unsigned char c[4]; 185 } U,T; 186 #endif 187 register int i; 188 register DES_LONG *s; 189 190 u=data[0]; 191 r=data[1]; 192 193 /* Things have been modified so that the initial rotate is 194 * done outside the loop. This required the 195 * des_SPtrans values in sp.h to be rotated 1 bit to the right. 196 * One perl script later and things have a 5% speed up on a sparc2. 197 * Thanks to Richard Outerbridge <71755.204 (at) CompuServe.COM> 198 * for pointing this out. */ 199 l=(r<<1)|(r>>31); 200 r=(u<<1)|(u>>31); 201 202 /* clear the top bits on machines with 8byte longs */ 203 l&=0xffffffffL; 204 r&=0xffffffffL; 205 206 s=(DES_LONG *)ks; 207 /* I don't know if it is worth the effort of loop unrolling the 208 * inner loop */ 209 if (encrypt) 210 { 211 for (i=0; i<32; i+=8) 212 { 213 D_ENCRYPT(l,r,i+0); /* 1 */ 214 D_ENCRYPT(r,l,i+2); /* 2 */ 215 D_ENCRYPT(l,r,i+4); /* 3 */ 216 D_ENCRYPT(r,l,i+6); /* 4 */ 217 } 218 } 219 else 220 { 221 for (i=30; i>0; i-=8) 222 { 223 D_ENCRYPT(l,r,i-0); /* 16 */ 224 D_ENCRYPT(r,l,i-2); /* 15 */ 225 D_ENCRYPT(l,r,i-4); /* 14 */ 226 D_ENCRYPT(r,l,i-6); /* 13 */ 227 } 228 } 229 l=(l>>1)|(l<<31); 230 r=(r>>1)|(r<<31); 231 /* clear the top bits on machines with 8byte longs */ 232 l&=0xffffffffL; 233 r&=0xffffffffL; 234 235 data[0]=l; 236 data[1]=r; 237 l=r=t=u=0; 238 } 239
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