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authorcvs2svn <admin@example.com>2001-04-23 15:30:26 +0000
committercvs2svn <admin@example.com>2001-04-23 15:30:26 +0000
commit5c517720d5b21a720e400586177c050d4bc95721 (patch)
tree34ec35b1061b27f8770c5ac5ee02aad558cbfc90 /src/lib/libcrypto/des/des_enc.c
parentd2092adc32c6de492232ba39518f9091db6bc67f (diff)
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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
61void des_encrypt(DES_LONG *data, des_key_schedule ks, int enc)
62 {
63 register DES_LONG l,r,t,u;
64#ifdef DES_PTR
65 register const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
66#endif
67#ifndef DES_UNROLL
68 register int i;
69#endif
70 register DES_LONG *s;
71
72 r=data[0];
73 l=data[1];
74
75 IP(r,l);
76 /* Things have been modified so that the initial rotate is
77 * done outside the loop. This required the
78 * des_SPtrans values in sp.h to be rotated 1 bit to the right.
79 * One perl script later and things have a 5% speed up on a sparc2.
80 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
81 * for pointing this out. */
82 /* clear the top bits on machines with 8byte longs */
83 /* shift left by 2 */
84 r=ROTATE(r,29)&0xffffffffL;
85 l=ROTATE(l,29)&0xffffffffL;
86
87 s=ks->ks.deslong;
88 /* I don't know if it is worth the effort of loop unrolling the
89 * inner loop */
90 if (enc)
91 {
92#ifdef DES_UNROLL
93 D_ENCRYPT(l,r, 0); /* 1 */
94 D_ENCRYPT(r,l, 2); /* 2 */
95 D_ENCRYPT(l,r, 4); /* 3 */
96 D_ENCRYPT(r,l, 6); /* 4 */
97 D_ENCRYPT(l,r, 8); /* 5 */
98 D_ENCRYPT(r,l,10); /* 6 */
99 D_ENCRYPT(l,r,12); /* 7 */
100 D_ENCRYPT(r,l,14); /* 8 */
101 D_ENCRYPT(l,r,16); /* 9 */
102 D_ENCRYPT(r,l,18); /* 10 */
103 D_ENCRYPT(l,r,20); /* 11 */
104 D_ENCRYPT(r,l,22); /* 12 */
105 D_ENCRYPT(l,r,24); /* 13 */
106 D_ENCRYPT(r,l,26); /* 14 */
107 D_ENCRYPT(l,r,28); /* 15 */
108 D_ENCRYPT(r,l,30); /* 16 */
109#else
110 for (i=0; i<32; i+=8)
111 {
112 D_ENCRYPT(l,r,i+0); /* 1 */
113 D_ENCRYPT(r,l,i+2); /* 2 */
114 D_ENCRYPT(l,r,i+4); /* 3 */
115 D_ENCRYPT(r,l,i+6); /* 4 */
116 }
117#endif
118 }
119 else
120 {
121#ifdef DES_UNROLL
122 D_ENCRYPT(l,r,30); /* 16 */
123 D_ENCRYPT(r,l,28); /* 15 */
124 D_ENCRYPT(l,r,26); /* 14 */
125 D_ENCRYPT(r,l,24); /* 13 */
126 D_ENCRYPT(l,r,22); /* 12 */
127 D_ENCRYPT(r,l,20); /* 11 */
128 D_ENCRYPT(l,r,18); /* 10 */
129 D_ENCRYPT(r,l,16); /* 9 */
130 D_ENCRYPT(l,r,14); /* 8 */
131 D_ENCRYPT(r,l,12); /* 7 */
132 D_ENCRYPT(l,r,10); /* 6 */
133 D_ENCRYPT(r,l, 8); /* 5 */
134 D_ENCRYPT(l,r, 6); /* 4 */
135 D_ENCRYPT(r,l, 4); /* 3 */
136 D_ENCRYPT(l,r, 2); /* 2 */
137 D_ENCRYPT(r,l, 0); /* 1 */
138#else
139 for (i=30; i>0; i-=8)
140 {
141 D_ENCRYPT(l,r,i-0); /* 16 */
142 D_ENCRYPT(r,l,i-2); /* 15 */
143 D_ENCRYPT(l,r,i-4); /* 14 */
144 D_ENCRYPT(r,l,i-6); /* 13 */
145 }
146#endif
147 }
148
149 /* rotate and clear the top bits on machines with 8byte longs */
150 l=ROTATE(l,3)&0xffffffffL;
151 r=ROTATE(r,3)&0xffffffffL;
152
153 FP(r,l);
154 data[0]=l;
155 data[1]=r;
156 l=r=t=u=0;
157 }
158
159void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc)
160 {
161 register DES_LONG l,r,t,u;
162#ifdef DES_PTR
163 register const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
164#endif
165#ifndef DES_UNROLL
166 register int i;
167#endif
168 register DES_LONG *s;
169
170 r=data[0];
171 l=data[1];
172
173 /* Things have been modified so that the initial rotate is
174 * done outside the loop. This required the
175 * des_SPtrans values in sp.h to be rotated 1 bit to the right.
176 * One perl script later and things have a 5% speed up on a sparc2.
177 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
178 * for pointing this out. */
179 /* clear the top bits on machines with 8byte longs */
180 r=ROTATE(r,29)&0xffffffffL;
181 l=ROTATE(l,29)&0xffffffffL;
182
183 s=ks->ks.deslong;
184 /* I don't know if it is worth the effort of loop unrolling the
185 * inner loop */
186 if (enc)
187 {
188#ifdef DES_UNROLL
189 D_ENCRYPT(l,r, 0); /* 1 */
190 D_ENCRYPT(r,l, 2); /* 2 */
191 D_ENCRYPT(l,r, 4); /* 3 */
192 D_ENCRYPT(r,l, 6); /* 4 */
193 D_ENCRYPT(l,r, 8); /* 5 */
194 D_ENCRYPT(r,l,10); /* 6 */
195 D_ENCRYPT(l,r,12); /* 7 */
196 D_ENCRYPT(r,l,14); /* 8 */
197 D_ENCRYPT(l,r,16); /* 9 */
198 D_ENCRYPT(r,l,18); /* 10 */
199 D_ENCRYPT(l,r,20); /* 11 */
200 D_ENCRYPT(r,l,22); /* 12 */
201 D_ENCRYPT(l,r,24); /* 13 */
202 D_ENCRYPT(r,l,26); /* 14 */
203 D_ENCRYPT(l,r,28); /* 15 */
204 D_ENCRYPT(r,l,30); /* 16 */
205#else
206 for (i=0; i<32; i+=8)
207 {
208 D_ENCRYPT(l,r,i+0); /* 1 */
209 D_ENCRYPT(r,l,i+2); /* 2 */
210 D_ENCRYPT(l,r,i+4); /* 3 */
211 D_ENCRYPT(r,l,i+6); /* 4 */
212 }
213#endif
214 }
215 else
216 {
217#ifdef DES_UNROLL
218 D_ENCRYPT(l,r,30); /* 16 */
219 D_ENCRYPT(r,l,28); /* 15 */
220 D_ENCRYPT(l,r,26); /* 14 */
221 D_ENCRYPT(r,l,24); /* 13 */
222 D_ENCRYPT(l,r,22); /* 12 */
223 D_ENCRYPT(r,l,20); /* 11 */
224 D_ENCRYPT(l,r,18); /* 10 */
225 D_ENCRYPT(r,l,16); /* 9 */
226 D_ENCRYPT(l,r,14); /* 8 */
227 D_ENCRYPT(r,l,12); /* 7 */
228 D_ENCRYPT(l,r,10); /* 6 */
229 D_ENCRYPT(r,l, 8); /* 5 */
230 D_ENCRYPT(l,r, 6); /* 4 */
231 D_ENCRYPT(r,l, 4); /* 3 */
232 D_ENCRYPT(l,r, 2); /* 2 */
233 D_ENCRYPT(r,l, 0); /* 1 */
234#else
235 for (i=30; i>0; i-=8)
236 {
237 D_ENCRYPT(l,r,i-0); /* 16 */
238 D_ENCRYPT(r,l,i-2); /* 15 */
239 D_ENCRYPT(l,r,i-4); /* 14 */
240 D_ENCRYPT(r,l,i-6); /* 13 */
241 }
242#endif
243 }
244 /* rotate and clear the top bits on machines with 8byte longs */
245 data[0]=ROTATE(l,3)&0xffffffffL;
246 data[1]=ROTATE(r,3)&0xffffffffL;
247 l=r=t=u=0;
248 }
249
250void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
251 des_key_schedule ks3)
252 {
253 register DES_LONG l,r;
254
255 l=data[0];
256 r=data[1];
257 IP(l,r);
258 data[0]=l;
259 data[1]=r;
260 des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
261 des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
262 des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
263 l=data[0];
264 r=data[1];
265 FP(r,l);
266 data[0]=l;
267 data[1]=r;
268 }
269
270void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
271 des_key_schedule ks3)
272 {
273 register DES_LONG l,r;
274
275 l=data[0];
276 r=data[1];
277 IP(l,r);
278 data[0]=l;
279 data[1]=r;
280 des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
281 des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
282 des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
283 l=data[0];
284 r=data[1];
285 FP(r,l);
286 data[0]=l;
287 data[1]=r;
288 }
289
290#ifndef DES_DEFAULT_OPTIONS
291
292#undef CBC_ENC_C__DONT_UPDATE_IV
293#include "ncbc_enc.c" /* des_ncbc_encrypt */
294
295void des_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
296 long length, des_key_schedule ks1, des_key_schedule ks2,
297 des_key_schedule ks3, des_cblock *ivec, int enc)
298 {
299 register DES_LONG tin0,tin1;
300 register DES_LONG tout0,tout1,xor0,xor1;
301 register const unsigned char *in;
302 unsigned char *out;
303 register long l=length;
304 DES_LONG tin[2];
305 unsigned char *iv;
306
307 in=input;
308 out=output;
309 iv = &(*ivec)[0];
310
311 if (enc)
312 {
313 c2l(iv,tout0);
314 c2l(iv,tout1);
315 for (l-=8; l>=0; l-=8)
316 {
317 c2l(in,tin0);
318 c2l(in,tin1);
319 tin0^=tout0;
320 tin1^=tout1;
321
322 tin[0]=tin0;
323 tin[1]=tin1;
324 des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
325 tout0=tin[0];
326 tout1=tin[1];
327
328 l2c(tout0,out);
329 l2c(tout1,out);
330 }
331 if (l != -8)
332 {
333 c2ln(in,tin0,tin1,l+8);
334 tin0^=tout0;
335 tin1^=tout1;
336
337 tin[0]=tin0;
338 tin[1]=tin1;
339 des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
340 tout0=tin[0];
341 tout1=tin[1];
342
343 l2c(tout0,out);
344 l2c(tout1,out);
345 }
346 iv = &(*ivec)[0];
347 l2c(tout0,iv);
348 l2c(tout1,iv);
349 }
350 else
351 {
352 register DES_LONG t0,t1;
353
354 c2l(iv,xor0);
355 c2l(iv,xor1);
356 for (l-=8; l>=0; l-=8)
357 {
358 c2l(in,tin0);
359 c2l(in,tin1);
360
361 t0=tin0;
362 t1=tin1;
363
364 tin[0]=tin0;
365 tin[1]=tin1;
366 des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
367 tout0=tin[0];
368 tout1=tin[1];
369
370 tout0^=xor0;
371 tout1^=xor1;
372 l2c(tout0,out);
373 l2c(tout1,out);
374 xor0=t0;
375 xor1=t1;
376 }
377 if (l != -8)
378 {
379 c2l(in,tin0);
380 c2l(in,tin1);
381
382 t0=tin0;
383 t1=tin1;
384
385 tin[0]=tin0;
386 tin[1]=tin1;
387 des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
388 tout0=tin[0];
389 tout1=tin[1];
390
391 tout0^=xor0;
392 tout1^=xor1;
393 l2cn(tout0,tout1,out,l+8);
394 xor0=t0;
395 xor1=t1;
396 }
397
398 iv = &(*ivec)[0];
399 l2c(xor0,iv);
400 l2c(xor1,iv);
401 }
402 tin0=tin1=tout0=tout1=xor0=xor1=0;
403 tin[0]=tin[1]=0;
404 }
405
406#endif /* DES_DEFAULT_OPTIONS */
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