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 <sys/cdefs.h> |
60 | __KERNEL_RCSID(0, "$NetBSD: des_enc.c,v 1.4 2005/12/11 12:20:52 christos Exp $" ); |
61 | |
62 | #include <sys/types.h> |
63 | #include <crypto/des/des_locl.h> |
64 | |
65 | extern const DES_LONG des_SPtrans[8][64]; |
66 | |
67 | void des_encrypt1(DES_LONG *data, des_key_schedule ks, int enc) |
68 | { |
69 | register DES_LONG l,r,t,u; |
70 | #ifdef DES_PTR |
71 | register const unsigned char *des_SP=(const unsigned char *)des_SPtrans; |
72 | #endif |
73 | #ifndef DES_UNROLL |
74 | register int i; |
75 | #endif |
76 | register DES_LONG *s; |
77 | |
78 | r=data[0]; |
79 | l=data[1]; |
80 | |
81 | IP(r,l); |
82 | /* Things have been modified so that the initial rotate is |
83 | * done outside the loop. This required the |
84 | * des_SPtrans values in sp.h to be rotated 1 bit to the right. |
85 | * One perl script later and things have a 5% speed up on a sparc2. |
86 | * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> |
87 | * for pointing this out. */ |
88 | /* clear the top bits on machines with 8byte longs */ |
89 | /* shift left by 2 */ |
90 | r=ROTATE(r,29)&0xffffffffL; |
91 | l=ROTATE(l,29)&0xffffffffL; |
92 | |
93 | s=ks->ks.deslong; |
94 | /* I don't know if it is worth the effort of loop unrolling the |
95 | * inner loop */ |
96 | if (enc) |
97 | { |
98 | #ifdef DES_UNROLL |
99 | D_ENCRYPT(l,r, 0); /* 1 */ |
100 | D_ENCRYPT(r,l, 2); /* 2 */ |
101 | D_ENCRYPT(l,r, 4); /* 3 */ |
102 | D_ENCRYPT(r,l, 6); /* 4 */ |
103 | D_ENCRYPT(l,r, 8); /* 5 */ |
104 | D_ENCRYPT(r,l,10); /* 6 */ |
105 | D_ENCRYPT(l,r,12); /* 7 */ |
106 | D_ENCRYPT(r,l,14); /* 8 */ |
107 | D_ENCRYPT(l,r,16); /* 9 */ |
108 | D_ENCRYPT(r,l,18); /* 10 */ |
109 | D_ENCRYPT(l,r,20); /* 11 */ |
110 | D_ENCRYPT(r,l,22); /* 12 */ |
111 | D_ENCRYPT(l,r,24); /* 13 */ |
112 | D_ENCRYPT(r,l,26); /* 14 */ |
113 | D_ENCRYPT(l,r,28); /* 15 */ |
114 | D_ENCRYPT(r,l,30); /* 16 */ |
115 | #else |
116 | for (i=0; i<32; i+=8) |
117 | { |
118 | D_ENCRYPT(l,r,i+0); /* 1 */ |
119 | D_ENCRYPT(r,l,i+2); /* 2 */ |
120 | D_ENCRYPT(l,r,i+4); /* 3 */ |
121 | D_ENCRYPT(r,l,i+6); /* 4 */ |
122 | } |
123 | #endif |
124 | } |
125 | else |
126 | { |
127 | #ifdef DES_UNROLL |
128 | D_ENCRYPT(l,r,30); /* 16 */ |
129 | D_ENCRYPT(r,l,28); /* 15 */ |
130 | D_ENCRYPT(l,r,26); /* 14 */ |
131 | D_ENCRYPT(r,l,24); /* 13 */ |
132 | D_ENCRYPT(l,r,22); /* 12 */ |
133 | D_ENCRYPT(r,l,20); /* 11 */ |
134 | D_ENCRYPT(l,r,18); /* 10 */ |
135 | D_ENCRYPT(r,l,16); /* 9 */ |
136 | D_ENCRYPT(l,r,14); /* 8 */ |
137 | D_ENCRYPT(r,l,12); /* 7 */ |
138 | D_ENCRYPT(l,r,10); /* 6 */ |
139 | D_ENCRYPT(r,l, 8); /* 5 */ |
140 | D_ENCRYPT(l,r, 6); /* 4 */ |
141 | D_ENCRYPT(r,l, 4); /* 3 */ |
142 | D_ENCRYPT(l,r, 2); /* 2 */ |
143 | D_ENCRYPT(r,l, 0); /* 1 */ |
144 | #else |
145 | for (i=30; i>0; i-=8) |
146 | { |
147 | D_ENCRYPT(l,r,i-0); /* 16 */ |
148 | D_ENCRYPT(r,l,i-2); /* 15 */ |
149 | D_ENCRYPT(l,r,i-4); /* 14 */ |
150 | D_ENCRYPT(r,l,i-6); /* 13 */ |
151 | } |
152 | #endif |
153 | } |
154 | |
155 | /* rotate and clear the top bits on machines with 8byte longs */ |
156 | l=ROTATE(l,3)&0xffffffffL; |
157 | r=ROTATE(r,3)&0xffffffffL; |
158 | |
159 | FP(r,l); |
160 | data[0]=l; |
161 | data[1]=r; |
162 | l=r=t=u=0; |
163 | } |
164 | |
165 | void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc) |
166 | { |
167 | register DES_LONG l,r,t,u; |
168 | #ifdef DES_PTR |
169 | register const unsigned char *des_SP=(const unsigned char *)des_SPtrans; |
170 | #endif |
171 | #ifndef DES_UNROLL |
172 | register int i; |
173 | #endif |
174 | register DES_LONG *s; |
175 | |
176 | r=data[0]; |
177 | l=data[1]; |
178 | |
179 | /* Things have been modified so that the initial rotate is |
180 | * done outside the loop. This required the |
181 | * des_SPtrans values in sp.h to be rotated 1 bit to the right. |
182 | * One perl script later and things have a 5% speed up on a sparc2. |
183 | * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> |
184 | * for pointing this out. */ |
185 | /* clear the top bits on machines with 8byte longs */ |
186 | r=ROTATE(r,29)&0xffffffffL; |
187 | l=ROTATE(l,29)&0xffffffffL; |
188 | |
189 | s=ks->ks.deslong; |
190 | /* I don't know if it is worth the effort of loop unrolling the |
191 | * inner loop */ |
192 | if (enc) |
193 | { |
194 | #ifdef DES_UNROLL |
195 | D_ENCRYPT(l,r, 0); /* 1 */ |
196 | D_ENCRYPT(r,l, 2); /* 2 */ |
197 | D_ENCRYPT(l,r, 4); /* 3 */ |
198 | D_ENCRYPT(r,l, 6); /* 4 */ |
199 | D_ENCRYPT(l,r, 8); /* 5 */ |
200 | D_ENCRYPT(r,l,10); /* 6 */ |
201 | D_ENCRYPT(l,r,12); /* 7 */ |
202 | D_ENCRYPT(r,l,14); /* 8 */ |
203 | D_ENCRYPT(l,r,16); /* 9 */ |
204 | D_ENCRYPT(r,l,18); /* 10 */ |
205 | D_ENCRYPT(l,r,20); /* 11 */ |
206 | D_ENCRYPT(r,l,22); /* 12 */ |
207 | D_ENCRYPT(l,r,24); /* 13 */ |
208 | D_ENCRYPT(r,l,26); /* 14 */ |
209 | D_ENCRYPT(l,r,28); /* 15 */ |
210 | D_ENCRYPT(r,l,30); /* 16 */ |
211 | #else |
212 | for (i=0; i<32; i+=8) |
213 | { |
214 | D_ENCRYPT(l,r,i+0); /* 1 */ |
215 | D_ENCRYPT(r,l,i+2); /* 2 */ |
216 | D_ENCRYPT(l,r,i+4); /* 3 */ |
217 | D_ENCRYPT(r,l,i+6); /* 4 */ |
218 | } |
219 | #endif |
220 | } |
221 | else |
222 | { |
223 | #ifdef DES_UNROLL |
224 | D_ENCRYPT(l,r,30); /* 16 */ |
225 | D_ENCRYPT(r,l,28); /* 15 */ |
226 | D_ENCRYPT(l,r,26); /* 14 */ |
227 | D_ENCRYPT(r,l,24); /* 13 */ |
228 | D_ENCRYPT(l,r,22); /* 12 */ |
229 | D_ENCRYPT(r,l,20); /* 11 */ |
230 | D_ENCRYPT(l,r,18); /* 10 */ |
231 | D_ENCRYPT(r,l,16); /* 9 */ |
232 | D_ENCRYPT(l,r,14); /* 8 */ |
233 | D_ENCRYPT(r,l,12); /* 7 */ |
234 | D_ENCRYPT(l,r,10); /* 6 */ |
235 | D_ENCRYPT(r,l, 8); /* 5 */ |
236 | D_ENCRYPT(l,r, 6); /* 4 */ |
237 | D_ENCRYPT(r,l, 4); /* 3 */ |
238 | D_ENCRYPT(l,r, 2); /* 2 */ |
239 | D_ENCRYPT(r,l, 0); /* 1 */ |
240 | #else |
241 | for (i=30; i>0; i-=8) |
242 | { |
243 | D_ENCRYPT(l,r,i-0); /* 16 */ |
244 | D_ENCRYPT(r,l,i-2); /* 15 */ |
245 | D_ENCRYPT(l,r,i-4); /* 14 */ |
246 | D_ENCRYPT(r,l,i-6); /* 13 */ |
247 | } |
248 | #endif |
249 | } |
250 | /* rotate and clear the top bits on machines with 8byte longs */ |
251 | data[0]=ROTATE(l,3)&0xffffffffL; |
252 | data[1]=ROTATE(r,3)&0xffffffffL; |
253 | l=r=t=u=0; |
254 | } |
255 | |
256 | void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2, |
257 | des_key_schedule ks3) |
258 | { |
259 | register DES_LONG l,r; |
260 | |
261 | l=data[0]; |
262 | r=data[1]; |
263 | IP(l,r); |
264 | data[0]=l; |
265 | data[1]=r; |
266 | des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT); |
267 | des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT); |
268 | des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT); |
269 | l=data[0]; |
270 | r=data[1]; |
271 | FP(r,l); |
272 | data[0]=l; |
273 | data[1]=r; |
274 | } |
275 | |
276 | void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2, |
277 | des_key_schedule ks3) |
278 | { |
279 | register DES_LONG l,r; |
280 | |
281 | l=data[0]; |
282 | r=data[1]; |
283 | IP(l,r); |
284 | data[0]=l; |
285 | data[1]=r; |
286 | des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT); |
287 | des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT); |
288 | des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT); |
289 | l=data[0]; |
290 | r=data[1]; |
291 | FP(r,l); |
292 | data[0]=l; |
293 | data[1]=r; |
294 | } |
295 | |