des_ecb.c revision 1.2
1 /* $NetBSD: des_ecb.c,v 1.2 2000/08/31 07:33:05 itojun Exp $ */ 2 /* $KAME: des_ecb.c,v 1.4 2000/08/31 07:27:27 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 #include <sys/malloc.h> 53 #include <sys/systm.h> 54 #include <crypto/des/des_locl.h> 55 #include <crypto/des/spr.h> 56 57 char *libdes_version="libdes v 3.24 - 20-Apr-1996 - eay"; 58 char *DES_version="DES part of SSLeay 0.6.4 30-Aug-1996"; 59 60 char *des_options() 61 { 62 #ifdef DES_PTR 63 if (sizeof(DES_LONG) != sizeof(long)) 64 return("des(ptr,int)"); 65 else 66 return("des(ptr,long)"); 67 #else 68 if (sizeof(DES_LONG) != sizeof(long)) 69 return("des(idx,int)"); 70 else 71 return("des(idx,long)"); 72 #endif 73 } 74 75 76 void des_ecb_encrypt(input, output, ks, encrypt) 77 des_cblock (*input); 78 des_cblock (*output); 79 des_key_schedule ks; 80 int encrypt; 81 { 82 register DES_LONG l; 83 register unsigned char *in,*out; 84 DES_LONG ll[2]; 85 86 in=(unsigned char *)input; 87 out=(unsigned char *)output; 88 c2l(in,l); ll[0]=l; 89 c2l(in,l); ll[1]=l; 90 des_encrypt(ll,ks,encrypt); 91 l=ll[0]; l2c(l,out); 92 l=ll[1]; l2c(l,out); 93 l=ll[0]=ll[1]=0; 94 } 95 96 void des_encrypt(data, ks, encrypt) 97 DES_LONG *data; 98 des_key_schedule ks; 99 int encrypt; 100 { 101 register DES_LONG l,r,t,u; 102 #ifdef DES_PTR 103 register unsigned char *des_SP=(unsigned char *)des_SPtrans; 104 #endif 105 #ifdef undef 106 union fudge { 107 DES_LONG l; 108 unsigned short s[2]; 109 unsigned char c[4]; 110 } U,T; 111 #endif 112 register int i; 113 register DES_LONG *s; 114 115 u=data[0]; 116 r=data[1]; 117 118 IP(u,r); 119 /* Things have been modified so that the initial rotate is 120 * done outside the loop. This required the 121 * des_SPtrans values in sp.h to be rotated 1 bit to the right. 122 * One perl script later and things have a 5% speed up on a sparc2. 123 * Thanks to Richard Outerbridge <71755.204 (at) CompuServe.COM> 124 * for pointing this out. */ 125 l=(r<<1)|(r>>31); 126 r=(u<<1)|(u>>31); 127 128 /* clear the top bits on machines with 8byte longs */ 129 l&=0xffffffffL; 130 r&=0xffffffffL; 131 132 s=(DES_LONG *)ks; 133 /* I don't know if it is worth the effort of loop unrolling the 134 * inner loop 135 */ 136 if (encrypt) 137 { 138 for (i=0; i<32; i+=8) 139 { 140 D_ENCRYPT(l,r,i+0); /* 1 */ 141 D_ENCRYPT(r,l,i+2); /* 2 */ 142 D_ENCRYPT(l,r,i+4); /* 3 */ 143 D_ENCRYPT(r,l,i+6); /* 4 */ 144 } 145 } 146 else 147 { 148 for (i=30; i>0; i-=8) 149 { 150 D_ENCRYPT(l,r,i-0); /* 16 */ 151 D_ENCRYPT(r,l,i-2); /* 15 */ 152 D_ENCRYPT(l,r,i-4); /* 14 */ 153 D_ENCRYPT(r,l,i-6); /* 13 */ 154 } 155 } 156 l=(l>>1)|(l<<31); 157 r=(r>>1)|(r<<31); 158 /* clear the top bits on machines with 8byte longs */ 159 l&=0xffffffffL; 160 r&=0xffffffffL; 161 162 FP(r,l); 163 data[0]=l; 164 data[1]=r; 165 l=r=t=u=0; 166 } 167 168 void des_encrypt2(data, ks, encrypt) 169 DES_LONG *data; 170 des_key_schedule ks; 171 int encrypt; 172 { 173 register DES_LONG l,r,t,u; 174 #ifdef DES_PTR 175 register unsigned char *des_SP=(unsigned char *)des_SPtrans; 176 #endif 177 #ifdef undef 178 union fudge { 179 DES_LONG l; 180 unsigned short s[2]; 181 unsigned char c[4]; 182 } U,T; 183 #endif 184 register int i; 185 register DES_LONG *s; 186 187 u=data[0]; 188 r=data[1]; 189 190 /* Things have been modified so that the initial rotate is 191 * done outside the loop. This required the 192 * des_SPtrans values in sp.h to be rotated 1 bit to the right. 193 * One perl script later and things have a 5% speed up on a sparc2. 194 * Thanks to Richard Outerbridge <71755.204 (at) CompuServe.COM> 195 * for pointing this out. */ 196 l=(r<<1)|(r>>31); 197 r=(u<<1)|(u>>31); 198 199 /* clear the top bits on machines with 8byte longs */ 200 l&=0xffffffffL; 201 r&=0xffffffffL; 202 203 s=(DES_LONG *)ks; 204 /* I don't know if it is worth the effort of loop unrolling the 205 * inner loop */ 206 if (encrypt) 207 { 208 for (i=0; i<32; i+=8) 209 { 210 D_ENCRYPT(l,r,i+0); /* 1 */ 211 D_ENCRYPT(r,l,i+2); /* 2 */ 212 D_ENCRYPT(l,r,i+4); /* 3 */ 213 D_ENCRYPT(r,l,i+6); /* 4 */ 214 } 215 } 216 else 217 { 218 for (i=30; i>0; i-=8) 219 { 220 D_ENCRYPT(l,r,i-0); /* 16 */ 221 D_ENCRYPT(r,l,i-2); /* 15 */ 222 D_ENCRYPT(l,r,i-4); /* 14 */ 223 D_ENCRYPT(r,l,i-6); /* 13 */ 224 } 225 } 226 l=(l>>1)|(l<<31); 227 r=(r>>1)|(r<<31); 228 /* clear the top bits on machines with 8byte longs */ 229 l&=0xffffffffL; 230 r&=0xffffffffL; 231 232 data[0]=l; 233 data[1]=r; 234 l=r=t=u=0; 235 } 236
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