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1/* crypto/des/des_enc.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include "des_locl.h"
60#include "spr.h"
61
62#ifndef OPENBSD_DES_ASM
63
64void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
65 {
66 register DES_LONG l,r,t,u;
67#ifdef DES_PTR
68 register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
69#endif
70#ifndef DES_UNROLL
71 register int i;
72#endif
73 register DES_LONG *s;
74
75 r=data[0];
76 l=data[1];
77
78 IP(r,l);
79 /* Things have been modified so that the initial rotate is
80 * done outside the loop. This required the
81 * DES_SPtrans values in sp.h to be rotated 1 bit to the right.
82 * One perl script later and things have a 5% speed up on a sparc2.
83 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
84 * for pointing this out. */
85 /* clear the top bits on machines with 8byte longs */
86 /* shift left by 2 */
87 r=ROTATE(r,29)&0xffffffffL;
88 l=ROTATE(l,29)&0xffffffffL;
89
90 s=ks->ks->deslong;
91 /* I don't know if it is worth the effort of loop unrolling the
92 * inner loop */
93 if (enc)
94 {
95#ifdef DES_UNROLL
96 D_ENCRYPT(l,r, 0); /* 1 */
97 D_ENCRYPT(r,l, 2); /* 2 */
98 D_ENCRYPT(l,r, 4); /* 3 */
99 D_ENCRYPT(r,l, 6); /* 4 */
100 D_ENCRYPT(l,r, 8); /* 5 */
101 D_ENCRYPT(r,l,10); /* 6 */
102 D_ENCRYPT(l,r,12); /* 7 */
103 D_ENCRYPT(r,l,14); /* 8 */
104 D_ENCRYPT(l,r,16); /* 9 */
105 D_ENCRYPT(r,l,18); /* 10 */
106 D_ENCRYPT(l,r,20); /* 11 */
107 D_ENCRYPT(r,l,22); /* 12 */
108 D_ENCRYPT(l,r,24); /* 13 */
109 D_ENCRYPT(r,l,26); /* 14 */
110 D_ENCRYPT(l,r,28); /* 15 */
111 D_ENCRYPT(r,l,30); /* 16 */
112#else
113 for (i=0; i<32; i+=4)
114 {
115 D_ENCRYPT(l,r,i+0); /* 1 */
116 D_ENCRYPT(r,l,i+2); /* 2 */
117 }
118#endif
119 }
120 else
121 {
122#ifdef DES_UNROLL
123 D_ENCRYPT(l,r,30); /* 16 */
124 D_ENCRYPT(r,l,28); /* 15 */
125 D_ENCRYPT(l,r,26); /* 14 */
126 D_ENCRYPT(r,l,24); /* 13 */
127 D_ENCRYPT(l,r,22); /* 12 */
128 D_ENCRYPT(r,l,20); /* 11 */
129 D_ENCRYPT(l,r,18); /* 10 */
130 D_ENCRYPT(r,l,16); /* 9 */
131 D_ENCRYPT(l,r,14); /* 8 */
132 D_ENCRYPT(r,l,12); /* 7 */
133 D_ENCRYPT(l,r,10); /* 6 */
134 D_ENCRYPT(r,l, 8); /* 5 */
135 D_ENCRYPT(l,r, 6); /* 4 */
136 D_ENCRYPT(r,l, 4); /* 3 */
137 D_ENCRYPT(l,r, 2); /* 2 */
138 D_ENCRYPT(r,l, 0); /* 1 */
139#else
140 for (i=30; i>0; i-=4)
141 {
142 D_ENCRYPT(l,r,i-0); /* 16 */
143 D_ENCRYPT(r,l,i-2); /* 15 */
144 }
145#endif
146 }
147
148 /* rotate and clear the top bits on machines with 8byte longs */
149 l=ROTATE(l,3)&0xffffffffL;
150 r=ROTATE(r,3)&0xffffffffL;
151
152 FP(r,l);
153 data[0]=l;
154 data[1]=r;
155 l=r=t=u=0;
156 }
157
158void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
159 {
160 register DES_LONG l,r,t,u;
161#ifdef DES_PTR
162 register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
163#endif
164#ifndef DES_UNROLL
165 register int i;
166#endif
167 register DES_LONG *s;
168
169 r=data[0];
170 l=data[1];
171
172 /* Things have been modified so that the initial rotate is
173 * done outside the loop. This required the
174 * DES_SPtrans values in sp.h to be rotated 1 bit to the right.
175 * One perl script later and things have a 5% speed up on a sparc2.
176 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
177 * for pointing this out. */
178 /* clear the top bits on machines with 8byte longs */
179 r=ROTATE(r,29)&0xffffffffL;
180 l=ROTATE(l,29)&0xffffffffL;
181
182 s=ks->ks->deslong;
183 /* I don't know if it is worth the effort of loop unrolling the
184 * inner loop */
185 if (enc)
186 {
187#ifdef DES_UNROLL
188 D_ENCRYPT(l,r, 0); /* 1 */
189 D_ENCRYPT(r,l, 2); /* 2 */
190 D_ENCRYPT(l,r, 4); /* 3 */
191 D_ENCRYPT(r,l, 6); /* 4 */
192 D_ENCRYPT(l,r, 8); /* 5 */
193 D_ENCRYPT(r,l,10); /* 6 */
194 D_ENCRYPT(l,r,12); /* 7 */
195 D_ENCRYPT(r,l,14); /* 8 */
196 D_ENCRYPT(l,r,16); /* 9 */
197 D_ENCRYPT(r,l,18); /* 10 */
198 D_ENCRYPT(l,r,20); /* 11 */
199 D_ENCRYPT(r,l,22); /* 12 */
200 D_ENCRYPT(l,r,24); /* 13 */
201 D_ENCRYPT(r,l,26); /* 14 */
202 D_ENCRYPT(l,r,28); /* 15 */
203 D_ENCRYPT(r,l,30); /* 16 */
204#else
205 for (i=0; i<32; i+=4)
206 {
207 D_ENCRYPT(l,r,i+0); /* 1 */
208 D_ENCRYPT(r,l,i+2); /* 2 */
209 }
210#endif
211 }
212 else
213 {
214#ifdef DES_UNROLL
215 D_ENCRYPT(l,r,30); /* 16 */
216 D_ENCRYPT(r,l,28); /* 15 */
217 D_ENCRYPT(l,r,26); /* 14 */
218 D_ENCRYPT(r,l,24); /* 13 */
219 D_ENCRYPT(l,r,22); /* 12 */
220 D_ENCRYPT(r,l,20); /* 11 */
221 D_ENCRYPT(l,r,18); /* 10 */
222 D_ENCRYPT(r,l,16); /* 9 */
223 D_ENCRYPT(l,r,14); /* 8 */
224 D_ENCRYPT(r,l,12); /* 7 */
225 D_ENCRYPT(l,r,10); /* 6 */
226 D_ENCRYPT(r,l, 8); /* 5 */
227 D_ENCRYPT(l,r, 6); /* 4 */
228 D_ENCRYPT(r,l, 4); /* 3 */
229 D_ENCRYPT(l,r, 2); /* 2 */
230 D_ENCRYPT(r,l, 0); /* 1 */
231#else
232 for (i=30; i>0; i-=4)
233 {
234 D_ENCRYPT(l,r,i-0); /* 16 */
235 D_ENCRYPT(r,l,i-2); /* 15 */
236 }
237#endif
238 }
239 /* rotate and clear the top bits on machines with 8byte longs */
240 data[0]=ROTATE(l,3)&0xffffffffL;
241 data[1]=ROTATE(r,3)&0xffffffffL;
242 l=r=t=u=0;
243 }
244
245#endif /* OPENBSD_DES_ASM */
246
247void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,
248 DES_key_schedule *ks2, DES_key_schedule *ks3)
249 {
250 register DES_LONG l,r;
251
252 l=data[0];
253 r=data[1];
254 IP(l,r);
255 data[0]=l;
256 data[1]=r;
257 DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
258 DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
259 DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
260 l=data[0];
261 r=data[1];
262 FP(r,l);
263 data[0]=l;
264 data[1]=r;
265 }
266
267void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,
268 DES_key_schedule *ks2, DES_key_schedule *ks3)
269 {
270 register DES_LONG l,r;
271
272 l=data[0];
273 r=data[1];
274 IP(l,r);
275 data[0]=l;
276 data[1]=r;
277 DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
278 DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
279 DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
280 l=data[0];
281 r=data[1];
282 FP(r,l);
283 data[0]=l;
284 data[1]=r;
285 }
286
287#ifndef DES_DEFAULT_OPTIONS
288
289#undef CBC_ENC_C__DONT_UPDATE_IV
290#include "ncbc_enc.c" /* DES_ncbc_encrypt */
291
292void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
293 long length, DES_key_schedule *ks1,
294 DES_key_schedule *ks2, DES_key_schedule *ks3,
295 DES_cblock *ivec, int enc)
296 {
297 register DES_LONG tin0,tin1;
298 register DES_LONG tout0,tout1,xor0,xor1;
299 register const unsigned char *in;
300 unsigned char *out;
301 register long l=length;
302 DES_LONG tin[2];
303 unsigned char *iv;
304
305 in=input;
306 out=output;
307 iv = &(*ivec)[0];
308
309 if (enc)
310 {
311 c2l(iv,tout0);
312 c2l(iv,tout1);
313 for (l-=8; l>=0; l-=8)
314 {
315 c2l(in,tin0);
316 c2l(in,tin1);
317 tin0^=tout0;
318 tin1^=tout1;
319
320 tin[0]=tin0;
321 tin[1]=tin1;
322 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
323 tout0=tin[0];
324 tout1=tin[1];
325
326 l2c(tout0,out);
327 l2c(tout1,out);
328 }
329 if (l != -8)
330 {
331 c2ln(in,tin0,tin1,l+8);
332 tin0^=tout0;
333 tin1^=tout1;
334
335 tin[0]=tin0;
336 tin[1]=tin1;
337 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
338 tout0=tin[0];
339 tout1=tin[1];
340
341 l2c(tout0,out);
342 l2c(tout1,out);
343 }
344 iv = &(*ivec)[0];
345 l2c(tout0,iv);
346 l2c(tout1,iv);
347 }
348 else
349 {
350 register DES_LONG t0,t1;
351
352 c2l(iv,xor0);
353 c2l(iv,xor1);
354 for (l-=8; l>=0; l-=8)
355 {
356 c2l(in,tin0);
357 c2l(in,tin1);
358
359 t0=tin0;
360 t1=tin1;
361
362 tin[0]=tin0;
363 tin[1]=tin1;
364 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
365 tout0=tin[0];
366 tout1=tin[1];
367
368 tout0^=xor0;
369 tout1^=xor1;
370 l2c(tout0,out);
371 l2c(tout1,out);
372 xor0=t0;
373 xor1=t1;
374 }
375 if (l != -8)
376 {
377 c2l(in,tin0);
378 c2l(in,tin1);
379
380 t0=tin0;
381 t1=tin1;
382
383 tin[0]=tin0;
384 tin[1]=tin1;
385 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
386 tout0=tin[0];
387 tout1=tin[1];
388
389 tout0^=xor0;
390 tout1^=xor1;
391 l2cn(tout0,tout1,out,l+8);
392 xor0=t0;
393 xor1=t1;
394 }
395
396 iv = &(*ivec)[0];
397 l2c(xor0,iv);
398 l2c(xor1,iv);
399 }
400 tin0=tin1=tout0=tout1=xor0=xor1=0;
401 tin[0]=tin[1]=0;
402 }
403
404#endif /* DES_DEFAULT_OPTIONS */
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