1 /* crypto/des/des_enc.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
62 void DES_encrypt1(DES_LONG
*data
, DES_key_schedule
*ks
, int enc
)
64 register DES_LONG l
, r
, t
, u
;
66 register const unsigned char *des_SP
= (const unsigned char *)DES_SPtrans
;
78 * Things have been modified so that the initial rotate is done outside
79 * the loop. This required the DES_SPtrans values in sp.h to be rotated
80 * 1 bit to the right. One perl script later and things have a 5% speed
81 * up on a sparc2. Thanks to Richard Outerbridge
82 * <71755.204@CompuServe.COM> for pointing this out.
84 /* clear the top bits on machines with 8byte longs */
86 r
= ROTATE(r
, 29) & 0xffffffffL
;
87 l
= ROTATE(l
, 29) & 0xffffffffL
;
91 * I don't know if it is worth the effort of loop unrolling the inner
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 */
113 for (i
= 0; i
< 32; i
+= 4) {
114 D_ENCRYPT(l
, r
, i
+ 0); /* 1 */
115 D_ENCRYPT(r
, l
, i
+ 2); /* 2 */
120 D_ENCRYPT(l
, r
, 30); /* 16 */
121 D_ENCRYPT(r
, l
, 28); /* 15 */
122 D_ENCRYPT(l
, r
, 26); /* 14 */
123 D_ENCRYPT(r
, l
, 24); /* 13 */
124 D_ENCRYPT(l
, r
, 22); /* 12 */
125 D_ENCRYPT(r
, l
, 20); /* 11 */
126 D_ENCRYPT(l
, r
, 18); /* 10 */
127 D_ENCRYPT(r
, l
, 16); /* 9 */
128 D_ENCRYPT(l
, r
, 14); /* 8 */
129 D_ENCRYPT(r
, l
, 12); /* 7 */
130 D_ENCRYPT(l
, r
, 10); /* 6 */
131 D_ENCRYPT(r
, l
, 8); /* 5 */
132 D_ENCRYPT(l
, r
, 6); /* 4 */
133 D_ENCRYPT(r
, l
, 4); /* 3 */
134 D_ENCRYPT(l
, r
, 2); /* 2 */
135 D_ENCRYPT(r
, l
, 0); /* 1 */
137 for (i
= 30; i
> 0; i
-= 4) {
138 D_ENCRYPT(l
, r
, i
- 0); /* 16 */
139 D_ENCRYPT(r
, l
, i
- 2); /* 15 */
144 /* rotate and clear the top bits on machines with 8byte longs */
145 l
= ROTATE(l
, 3) & 0xffffffffL
;
146 r
= ROTATE(r
, 3) & 0xffffffffL
;
154 void DES_encrypt2(DES_LONG
*data
, DES_key_schedule
*ks
, int enc
)
156 register DES_LONG l
, r
, t
, u
;
158 register const unsigned char *des_SP
= (const unsigned char *)DES_SPtrans
;
163 register DES_LONG
*s
;
169 * Things have been modified so that the initial rotate is done outside
170 * the loop. This required the DES_SPtrans values in sp.h to be rotated
171 * 1 bit to the right. One perl script later and things have a 5% speed
172 * up on a sparc2. Thanks to Richard Outerbridge
173 * <71755.204@CompuServe.COM> for pointing this out.
175 /* clear the top bits on machines with 8byte longs */
176 r
= ROTATE(r
, 29) & 0xffffffffL
;
177 l
= ROTATE(l
, 29) & 0xffffffffL
;
181 * I don't know if it is worth the effort of loop unrolling the inner
186 D_ENCRYPT(l
, r
, 0); /* 1 */
187 D_ENCRYPT(r
, l
, 2); /* 2 */
188 D_ENCRYPT(l
, r
, 4); /* 3 */
189 D_ENCRYPT(r
, l
, 6); /* 4 */
190 D_ENCRYPT(l
, r
, 8); /* 5 */
191 D_ENCRYPT(r
, l
, 10); /* 6 */
192 D_ENCRYPT(l
, r
, 12); /* 7 */
193 D_ENCRYPT(r
, l
, 14); /* 8 */
194 D_ENCRYPT(l
, r
, 16); /* 9 */
195 D_ENCRYPT(r
, l
, 18); /* 10 */
196 D_ENCRYPT(l
, r
, 20); /* 11 */
197 D_ENCRYPT(r
, l
, 22); /* 12 */
198 D_ENCRYPT(l
, r
, 24); /* 13 */
199 D_ENCRYPT(r
, l
, 26); /* 14 */
200 D_ENCRYPT(l
, r
, 28); /* 15 */
201 D_ENCRYPT(r
, l
, 30); /* 16 */
203 for (i
= 0; i
< 32; i
+= 4) {
204 D_ENCRYPT(l
, r
, i
+ 0); /* 1 */
205 D_ENCRYPT(r
, l
, i
+ 2); /* 2 */
210 D_ENCRYPT(l
, r
, 30); /* 16 */
211 D_ENCRYPT(r
, l
, 28); /* 15 */
212 D_ENCRYPT(l
, r
, 26); /* 14 */
213 D_ENCRYPT(r
, l
, 24); /* 13 */
214 D_ENCRYPT(l
, r
, 22); /* 12 */
215 D_ENCRYPT(r
, l
, 20); /* 11 */
216 D_ENCRYPT(l
, r
, 18); /* 10 */
217 D_ENCRYPT(r
, l
, 16); /* 9 */
218 D_ENCRYPT(l
, r
, 14); /* 8 */
219 D_ENCRYPT(r
, l
, 12); /* 7 */
220 D_ENCRYPT(l
, r
, 10); /* 6 */
221 D_ENCRYPT(r
, l
, 8); /* 5 */
222 D_ENCRYPT(l
, r
, 6); /* 4 */
223 D_ENCRYPT(r
, l
, 4); /* 3 */
224 D_ENCRYPT(l
, r
, 2); /* 2 */
225 D_ENCRYPT(r
, l
, 0); /* 1 */
227 for (i
= 30; i
> 0; i
-= 4) {
228 D_ENCRYPT(l
, r
, i
- 0); /* 16 */
229 D_ENCRYPT(r
, l
, i
- 2); /* 15 */
233 /* rotate and clear the top bits on machines with 8byte longs */
234 data
[0] = ROTATE(l
, 3) & 0xffffffffL
;
235 data
[1] = ROTATE(r
, 3) & 0xffffffffL
;
239 void DES_encrypt3(DES_LONG
*data
, DES_key_schedule
*ks1
,
240 DES_key_schedule
*ks2
, DES_key_schedule
*ks3
)
242 register DES_LONG l
, r
;
249 DES_encrypt2((DES_LONG
*)data
, ks1
, DES_ENCRYPT
);
250 DES_encrypt2((DES_LONG
*)data
, ks2
, DES_DECRYPT
);
251 DES_encrypt2((DES_LONG
*)data
, ks3
, DES_ENCRYPT
);
259 void DES_decrypt3(DES_LONG
*data
, DES_key_schedule
*ks1
,
260 DES_key_schedule
*ks2
, DES_key_schedule
*ks3
)
262 register DES_LONG l
, r
;
269 DES_encrypt2((DES_LONG
*)data
, ks3
, DES_DECRYPT
);
270 DES_encrypt2((DES_LONG
*)data
, ks2
, DES_ENCRYPT
);
271 DES_encrypt2((DES_LONG
*)data
, ks1
, DES_DECRYPT
);
279 #ifndef DES_DEFAULT_OPTIONS
281 # undef CBC_ENC_C__DONT_UPDATE_IV
282 # include "ncbc_enc.c" /* DES_ncbc_encrypt */
284 void DES_ede3_cbc_encrypt(const unsigned char *input
, unsigned char *output
,
285 long length
, DES_key_schedule
*ks1
,
286 DES_key_schedule
*ks2
, DES_key_schedule
*ks3
,
287 DES_cblock
*ivec
, int enc
)
289 register DES_LONG tin0
, tin1
;
290 register DES_LONG tout0
, tout1
, xor0
, xor1
;
291 register const unsigned char *in
;
293 register long l
= length
;
304 for (l
-= 8; l
>= 0; l
-= 8) {
312 DES_encrypt3((DES_LONG
*)tin
, ks1
, ks2
, ks3
);
320 c2ln(in
, tin0
, tin1
, l
+ 8);
326 DES_encrypt3((DES_LONG
*)tin
, ks1
, ks2
, ks3
);
337 register DES_LONG t0
, t1
;
341 for (l
-= 8; l
>= 0; l
-= 8) {
350 DES_decrypt3((DES_LONG
*)tin
, ks1
, ks2
, ks3
);
370 DES_decrypt3((DES_LONG
*)tin
, ks1
, ks2
, ks3
);
376 l2cn(tout0
, tout1
, out
, l
+ 8);
385 tin0
= tin1
= tout0
= tout1
= xor0
= xor1
= 0;
389 #endif /* DES_DEFAULT_OPTIONS */