1 /* $KAME: des_enc.c,v 1.1 2001/09/10 04:03:58 itojun Exp $ */ 2 3 /* crypto/des/des_enc.c */ 4 5 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 6 * All rights reserved. 7 * 8 * This package is an SSL implementation written 9 * by Eric Young (eay@cryptsoft.com). 10 * The implementation was written so as to conform with Netscapes SSL. 11 * 12 * This library is free for commercial and non-commercial use as long as 13 * the following conditions are aheared to. The following conditions 14 * apply to all code found in this distribution, be it the RC4, RSA, 15 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 16 * included with this distribution is covered by the same copyright terms 17 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 18 * 19 * Copyright remains Eric Young's, and as such any Copyright notices in 20 * the code are not to be removed. 21 * If this package is used in a product, Eric Young should be given attribution 22 * as the author of the parts of the library used. 23 * This can be in the form of a textual message at program startup or 24 * in documentation (online or textual) provided with the package. 25 * 26 * Redistribution and use in source and binary forms, with or without 27 * modification, are permitted provided that the following conditions 28 * are met: 29 * 1. Redistributions of source code must retain the copyright 30 * notice, this list of conditions and the following disclaimer. 31 * 2. Redistributions in binary form must reproduce the above copyright 32 * notice, this list of conditions and the following disclaimer in the 33 * documentation and/or other materials provided with the distribution. 34 * 3. All advertising materials mentioning features or use of this software 35 * must display the following acknowledgement: 36 * "This product includes cryptographic software written by 37 * Eric Young (eay@cryptsoft.com)" 38 * The word 'cryptographic' can be left out if the rouines from the library 39 * being used are not cryptographic related :-). 40 * 4. If you include any Windows specific code (or a derivative thereof) from 41 * the apps directory (application code) you must include an acknowledgement: 42 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 43 * 44 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 * 56 * The licence and distribution terms for any publically available version or 57 * derivative of this code cannot be changed. i.e. this code cannot simply be 58 * copied and put under another distribution licence 59 * [including the GNU Public Licence.] 60 */ 61 62 #include <sys/cdefs.h> 63 #include <sys/types.h> 64 #include <crypto/des/des_locl.h> 65 66 extern const DES_LONG des_SPtrans[8][64]; 67 68 void des_encrypt1(DES_LONG *data, des_key_schedule ks, int enc) 69 { 70 DES_LONG l,r,t,u; 71 #ifdef DES_PTR 72 const unsigned char *des_SP=(const unsigned char *)des_SPtrans; 73 #endif 74 #ifndef DES_UNROLL 75 int i; 76 #endif 77 DES_LONG *s; 78 79 r=data[0]; 80 l=data[1]; 81 82 IP(r,l); 83 /* Things have been modified so that the initial rotate is 84 * done outside the loop. This required the 85 * des_SPtrans values in sp.h to be rotated 1 bit to the right. 86 * One perl script later and things have a 5% speed up on a sparc2. 87 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 88 * for pointing this out. */ 89 /* clear the top bits on machines with 8byte longs */ 90 /* shift left by 2 */ 91 r=ROTATE(r,29)&0xffffffffL; 92 l=ROTATE(l,29)&0xffffffffL; 93 94 s=ks->ks.deslong; 95 /* I don't know if it is worth the effort of loop unrolling the 96 * inner loop */ 97 if (enc) 98 { 99 #ifdef DES_UNROLL 100 D_ENCRYPT(l,r, 0); /* 1 */ 101 D_ENCRYPT(r,l, 2); /* 2 */ 102 D_ENCRYPT(l,r, 4); /* 3 */ 103 D_ENCRYPT(r,l, 6); /* 4 */ 104 D_ENCRYPT(l,r, 8); /* 5 */ 105 D_ENCRYPT(r,l,10); /* 6 */ 106 D_ENCRYPT(l,r,12); /* 7 */ 107 D_ENCRYPT(r,l,14); /* 8 */ 108 D_ENCRYPT(l,r,16); /* 9 */ 109 D_ENCRYPT(r,l,18); /* 10 */ 110 D_ENCRYPT(l,r,20); /* 11 */ 111 D_ENCRYPT(r,l,22); /* 12 */ 112 D_ENCRYPT(l,r,24); /* 13 */ 113 D_ENCRYPT(r,l,26); /* 14 */ 114 D_ENCRYPT(l,r,28); /* 15 */ 115 D_ENCRYPT(r,l,30); /* 16 */ 116 #else 117 for (i=0; i<32; i+=8) 118 { 119 D_ENCRYPT(l,r,i+0); /* 1 */ 120 D_ENCRYPT(r,l,i+2); /* 2 */ 121 D_ENCRYPT(l,r,i+4); /* 3 */ 122 D_ENCRYPT(r,l,i+6); /* 4 */ 123 } 124 #endif 125 } 126 else 127 { 128 #ifdef DES_UNROLL 129 D_ENCRYPT(l,r,30); /* 16 */ 130 D_ENCRYPT(r,l,28); /* 15 */ 131 D_ENCRYPT(l,r,26); /* 14 */ 132 D_ENCRYPT(r,l,24); /* 13 */ 133 D_ENCRYPT(l,r,22); /* 12 */ 134 D_ENCRYPT(r,l,20); /* 11 */ 135 D_ENCRYPT(l,r,18); /* 10 */ 136 D_ENCRYPT(r,l,16); /* 9 */ 137 D_ENCRYPT(l,r,14); /* 8 */ 138 D_ENCRYPT(r,l,12); /* 7 */ 139 D_ENCRYPT(l,r,10); /* 6 */ 140 D_ENCRYPT(r,l, 8); /* 5 */ 141 D_ENCRYPT(l,r, 6); /* 4 */ 142 D_ENCRYPT(r,l, 4); /* 3 */ 143 D_ENCRYPT(l,r, 2); /* 2 */ 144 D_ENCRYPT(r,l, 0); /* 1 */ 145 #else 146 for (i=30; i>0; i-=8) 147 { 148 D_ENCRYPT(l,r,i-0); /* 16 */ 149 D_ENCRYPT(r,l,i-2); /* 15 */ 150 D_ENCRYPT(l,r,i-4); /* 14 */ 151 D_ENCRYPT(r,l,i-6); /* 13 */ 152 } 153 #endif 154 } 155 156 /* rotate and clear the top bits on machines with 8byte longs */ 157 l=ROTATE(l,3)&0xffffffffL; 158 r=ROTATE(r,3)&0xffffffffL; 159 160 FP(r,l); 161 data[0]=l; 162 data[1]=r; 163 l=r=t=u=0; 164 } 165 166 void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc) 167 { 168 DES_LONG l,r,t,u; 169 #ifdef DES_PTR 170 const unsigned char *des_SP=(const unsigned char *)des_SPtrans; 171 #endif 172 #ifndef DES_UNROLL 173 int i; 174 #endif 175 DES_LONG *s; 176 177 r=data[0]; 178 l=data[1]; 179 180 /* Things have been modified so that the initial rotate is 181 * done outside the loop. This required the 182 * des_SPtrans values in sp.h to be rotated 1 bit to the right. 183 * One perl script later and things have a 5% speed up on a sparc2. 184 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 185 * for pointing this out. */ 186 /* clear the top bits on machines with 8byte longs */ 187 r=ROTATE(r,29)&0xffffffffL; 188 l=ROTATE(l,29)&0xffffffffL; 189 190 s=ks->ks.deslong; 191 /* I don't know if it is worth the effort of loop unrolling the 192 * inner loop */ 193 if (enc) 194 { 195 #ifdef DES_UNROLL 196 D_ENCRYPT(l,r, 0); /* 1 */ 197 D_ENCRYPT(r,l, 2); /* 2 */ 198 D_ENCRYPT(l,r, 4); /* 3 */ 199 D_ENCRYPT(r,l, 6); /* 4 */ 200 D_ENCRYPT(l,r, 8); /* 5 */ 201 D_ENCRYPT(r,l,10); /* 6 */ 202 D_ENCRYPT(l,r,12); /* 7 */ 203 D_ENCRYPT(r,l,14); /* 8 */ 204 D_ENCRYPT(l,r,16); /* 9 */ 205 D_ENCRYPT(r,l,18); /* 10 */ 206 D_ENCRYPT(l,r,20); /* 11 */ 207 D_ENCRYPT(r,l,22); /* 12 */ 208 D_ENCRYPT(l,r,24); /* 13 */ 209 D_ENCRYPT(r,l,26); /* 14 */ 210 D_ENCRYPT(l,r,28); /* 15 */ 211 D_ENCRYPT(r,l,30); /* 16 */ 212 #else 213 for (i=0; i<32; i+=8) 214 { 215 D_ENCRYPT(l,r,i+0); /* 1 */ 216 D_ENCRYPT(r,l,i+2); /* 2 */ 217 D_ENCRYPT(l,r,i+4); /* 3 */ 218 D_ENCRYPT(r,l,i+6); /* 4 */ 219 } 220 #endif 221 } 222 else 223 { 224 #ifdef DES_UNROLL 225 D_ENCRYPT(l,r,30); /* 16 */ 226 D_ENCRYPT(r,l,28); /* 15 */ 227 D_ENCRYPT(l,r,26); /* 14 */ 228 D_ENCRYPT(r,l,24); /* 13 */ 229 D_ENCRYPT(l,r,22); /* 12 */ 230 D_ENCRYPT(r,l,20); /* 11 */ 231 D_ENCRYPT(l,r,18); /* 10 */ 232 D_ENCRYPT(r,l,16); /* 9 */ 233 D_ENCRYPT(l,r,14); /* 8 */ 234 D_ENCRYPT(r,l,12); /* 7 */ 235 D_ENCRYPT(l,r,10); /* 6 */ 236 D_ENCRYPT(r,l, 8); /* 5 */ 237 D_ENCRYPT(l,r, 6); /* 4 */ 238 D_ENCRYPT(r,l, 4); /* 3 */ 239 D_ENCRYPT(l,r, 2); /* 2 */ 240 D_ENCRYPT(r,l, 0); /* 1 */ 241 #else 242 for (i=30; i>0; i-=8) 243 { 244 D_ENCRYPT(l,r,i-0); /* 16 */ 245 D_ENCRYPT(r,l,i-2); /* 15 */ 246 D_ENCRYPT(l,r,i-4); /* 14 */ 247 D_ENCRYPT(r,l,i-6); /* 13 */ 248 } 249 #endif 250 } 251 /* rotate and clear the top bits on machines with 8byte longs */ 252 data[0]=ROTATE(l,3)&0xffffffffL; 253 data[1]=ROTATE(r,3)&0xffffffffL; 254 l=r=t=u=0; 255 } 256 257 void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2, 258 des_key_schedule ks3) 259 { 260 DES_LONG l,r; 261 262 l=data[0]; 263 r=data[1]; 264 IP(l,r); 265 data[0]=l; 266 data[1]=r; 267 des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT); 268 des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT); 269 des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT); 270 l=data[0]; 271 r=data[1]; 272 FP(r,l); 273 data[0]=l; 274 data[1]=r; 275 } 276 277 void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2, 278 des_key_schedule ks3) 279 { 280 DES_LONG l,r; 281 282 l=data[0]; 283 r=data[1]; 284 IP(l,r); 285 data[0]=l; 286 data[1]=r; 287 des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT); 288 des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT); 289 des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT); 290 l=data[0]; 291 r=data[1]; 292 FP(r,l); 293 data[0]=l; 294 data[1]=r; 295 } 296