Line data Source code
1 : /* crypto/des/set_key.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 : /*-
60 : * set_key.c v 1.4 eay 24/9/91
61 : * 1.4 Speed up by 400% :-)
62 : * 1.3 added register declarations.
63 : * 1.2 unrolled make_key_sched a bit more
64 : * 1.1 added norm_expand_bits
65 : * 1.0 First working version
66 : */
67 : #include <openssl/crypto.h>
68 : #include "des_locl.h"
69 :
70 : OPENSSL_IMPLEMENT_GLOBAL(int, DES_check_key, 0)
71 : /*
72 : * defaults to false
73 : */
74 : static const unsigned char odd_parity[256] = {
75 : 1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14,
76 : 16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31,
77 : 32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47,
78 : 49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62,
79 : 64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79,
80 : 81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94,
81 : 97, 97, 98, 98, 100, 100, 103, 103, 104, 104, 107, 107, 109, 109, 110,
82 : 110,
83 : 112, 112, 115, 115, 117, 117, 118, 118, 121, 121, 122, 122, 124, 124, 127,
84 : 127,
85 : 128, 128, 131, 131, 133, 133, 134, 134, 137, 137, 138, 138, 140, 140, 143,
86 : 143,
87 : 145, 145, 146, 146, 148, 148, 151, 151, 152, 152, 155, 155, 157, 157, 158,
88 : 158,
89 : 161, 161, 162, 162, 164, 164, 167, 167, 168, 168, 171, 171, 173, 173, 174,
90 : 174,
91 : 176, 176, 179, 179, 181, 181, 182, 182, 185, 185, 186, 186, 188, 188, 191,
92 : 191,
93 : 193, 193, 194, 194, 196, 196, 199, 199, 200, 200, 203, 203, 205, 205, 206,
94 : 206,
95 : 208, 208, 211, 211, 213, 213, 214, 214, 217, 217, 218, 218, 220, 220, 223,
96 : 223,
97 : 224, 224, 227, 227, 229, 229, 230, 230, 233, 233, 234, 234, 236, 236, 239,
98 : 239,
99 : 241, 241, 242, 242, 244, 244, 247, 247, 248, 248, 251, 251, 253, 253, 254,
100 : 254
101 : };
102 :
103 0 : void DES_set_odd_parity(DES_cblock *key)
104 : {
105 : unsigned int i;
106 :
107 0 : for (i = 0; i < DES_KEY_SZ; i++)
108 0 : (*key)[i] = odd_parity[(*key)[i]];
109 0 : }
110 :
111 0 : int DES_check_key_parity(const_DES_cblock *key)
112 : {
113 : unsigned int i;
114 :
115 0 : for (i = 0; i < DES_KEY_SZ; i++) {
116 0 : if ((*key)[i] != odd_parity[(*key)[i]])
117 : return (0);
118 : }
119 : return (1);
120 : }
121 :
122 : /*-
123 : * Weak and semi week keys as take from
124 : * %A D.W. Davies
125 : * %A W.L. Price
126 : * %T Security for Computer Networks
127 : * %I John Wiley & Sons
128 : * %D 1984
129 : * Many thanks to smb@ulysses.att.com (Steven Bellovin) for the reference
130 : * (and actual cblock values).
131 : */
132 : #define NUM_WEAK_KEY 16
133 : static const DES_cblock weak_keys[NUM_WEAK_KEY] = {
134 : /* weak keys */
135 : {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01},
136 : {0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE},
137 : {0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E},
138 : {0xE0, 0xE0, 0xE0, 0xE0, 0xF1, 0xF1, 0xF1, 0xF1},
139 : /* semi-weak keys */
140 : {0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE},
141 : {0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01},
142 : {0x1F, 0xE0, 0x1F, 0xE0, 0x0E, 0xF1, 0x0E, 0xF1},
143 : {0xE0, 0x1F, 0xE0, 0x1F, 0xF1, 0x0E, 0xF1, 0x0E},
144 : {0x01, 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1},
145 : {0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1, 0x01},
146 : {0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E, 0xFE},
147 : {0xFE, 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E},
148 : {0x01, 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E},
149 : {0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E, 0x01},
150 : {0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE},
151 : {0xFE, 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1}
152 : };
153 :
154 0 : int DES_is_weak_key(const_DES_cblock *key)
155 : {
156 : int i;
157 :
158 0 : for (i = 0; i < NUM_WEAK_KEY; i++)
159 : /*
160 : * Added == 0 to comparison, I obviously don't run this section very
161 : * often :-(, thanks to engineering@MorningStar.Com for the fix eay
162 : * 93/06/29 Another problem, I was comparing only the first 4 bytes,
163 : * 97/03/18
164 : */
165 0 : if (memcmp(weak_keys[i], key, sizeof(DES_cblock)) == 0)
166 : return (1);
167 : return (0);
168 : }
169 :
170 : /*-
171 : * NOW DEFINED IN des_local.h
172 : * See ecb_encrypt.c for a pseudo description of these macros.
173 : * #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
174 : * (b)^=(t),\
175 : * (a)=((a)^((t)<<(n))))
176 : */
177 :
178 : #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
179 : (a)=(a)^(t)^(t>>(16-(n))))
180 :
181 : static const DES_LONG des_skb[8][64] = {
182 : {
183 : /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
184 : 0x00000000L, 0x00000010L, 0x20000000L, 0x20000010L,
185 : 0x00010000L, 0x00010010L, 0x20010000L, 0x20010010L,
186 : 0x00000800L, 0x00000810L, 0x20000800L, 0x20000810L,
187 : 0x00010800L, 0x00010810L, 0x20010800L, 0x20010810L,
188 : 0x00000020L, 0x00000030L, 0x20000020L, 0x20000030L,
189 : 0x00010020L, 0x00010030L, 0x20010020L, 0x20010030L,
190 : 0x00000820L, 0x00000830L, 0x20000820L, 0x20000830L,
191 : 0x00010820L, 0x00010830L, 0x20010820L, 0x20010830L,
192 : 0x00080000L, 0x00080010L, 0x20080000L, 0x20080010L,
193 : 0x00090000L, 0x00090010L, 0x20090000L, 0x20090010L,
194 : 0x00080800L, 0x00080810L, 0x20080800L, 0x20080810L,
195 : 0x00090800L, 0x00090810L, 0x20090800L, 0x20090810L,
196 : 0x00080020L, 0x00080030L, 0x20080020L, 0x20080030L,
197 : 0x00090020L, 0x00090030L, 0x20090020L, 0x20090030L,
198 : 0x00080820L, 0x00080830L, 0x20080820L, 0x20080830L,
199 : 0x00090820L, 0x00090830L, 0x20090820L, 0x20090830L,
200 : },
201 : {
202 : /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
203 : 0x00000000L, 0x02000000L, 0x00002000L, 0x02002000L,
204 : 0x00200000L, 0x02200000L, 0x00202000L, 0x02202000L,
205 : 0x00000004L, 0x02000004L, 0x00002004L, 0x02002004L,
206 : 0x00200004L, 0x02200004L, 0x00202004L, 0x02202004L,
207 : 0x00000400L, 0x02000400L, 0x00002400L, 0x02002400L,
208 : 0x00200400L, 0x02200400L, 0x00202400L, 0x02202400L,
209 : 0x00000404L, 0x02000404L, 0x00002404L, 0x02002404L,
210 : 0x00200404L, 0x02200404L, 0x00202404L, 0x02202404L,
211 : 0x10000000L, 0x12000000L, 0x10002000L, 0x12002000L,
212 : 0x10200000L, 0x12200000L, 0x10202000L, 0x12202000L,
213 : 0x10000004L, 0x12000004L, 0x10002004L, 0x12002004L,
214 : 0x10200004L, 0x12200004L, 0x10202004L, 0x12202004L,
215 : 0x10000400L, 0x12000400L, 0x10002400L, 0x12002400L,
216 : 0x10200400L, 0x12200400L, 0x10202400L, 0x12202400L,
217 : 0x10000404L, 0x12000404L, 0x10002404L, 0x12002404L,
218 : 0x10200404L, 0x12200404L, 0x10202404L, 0x12202404L,
219 : },
220 : {
221 : /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
222 : 0x00000000L, 0x00000001L, 0x00040000L, 0x00040001L,
223 : 0x01000000L, 0x01000001L, 0x01040000L, 0x01040001L,
224 : 0x00000002L, 0x00000003L, 0x00040002L, 0x00040003L,
225 : 0x01000002L, 0x01000003L, 0x01040002L, 0x01040003L,
226 : 0x00000200L, 0x00000201L, 0x00040200L, 0x00040201L,
227 : 0x01000200L, 0x01000201L, 0x01040200L, 0x01040201L,
228 : 0x00000202L, 0x00000203L, 0x00040202L, 0x00040203L,
229 : 0x01000202L, 0x01000203L, 0x01040202L, 0x01040203L,
230 : 0x08000000L, 0x08000001L, 0x08040000L, 0x08040001L,
231 : 0x09000000L, 0x09000001L, 0x09040000L, 0x09040001L,
232 : 0x08000002L, 0x08000003L, 0x08040002L, 0x08040003L,
233 : 0x09000002L, 0x09000003L, 0x09040002L, 0x09040003L,
234 : 0x08000200L, 0x08000201L, 0x08040200L, 0x08040201L,
235 : 0x09000200L, 0x09000201L, 0x09040200L, 0x09040201L,
236 : 0x08000202L, 0x08000203L, 0x08040202L, 0x08040203L,
237 : 0x09000202L, 0x09000203L, 0x09040202L, 0x09040203L,
238 : },
239 : {
240 : /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
241 : 0x00000000L, 0x00100000L, 0x00000100L, 0x00100100L,
242 : 0x00000008L, 0x00100008L, 0x00000108L, 0x00100108L,
243 : 0x00001000L, 0x00101000L, 0x00001100L, 0x00101100L,
244 : 0x00001008L, 0x00101008L, 0x00001108L, 0x00101108L,
245 : 0x04000000L, 0x04100000L, 0x04000100L, 0x04100100L,
246 : 0x04000008L, 0x04100008L, 0x04000108L, 0x04100108L,
247 : 0x04001000L, 0x04101000L, 0x04001100L, 0x04101100L,
248 : 0x04001008L, 0x04101008L, 0x04001108L, 0x04101108L,
249 : 0x00020000L, 0x00120000L, 0x00020100L, 0x00120100L,
250 : 0x00020008L, 0x00120008L, 0x00020108L, 0x00120108L,
251 : 0x00021000L, 0x00121000L, 0x00021100L, 0x00121100L,
252 : 0x00021008L, 0x00121008L, 0x00021108L, 0x00121108L,
253 : 0x04020000L, 0x04120000L, 0x04020100L, 0x04120100L,
254 : 0x04020008L, 0x04120008L, 0x04020108L, 0x04120108L,
255 : 0x04021000L, 0x04121000L, 0x04021100L, 0x04121100L,
256 : 0x04021008L, 0x04121008L, 0x04021108L, 0x04121108L,
257 : },
258 : {
259 : /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
260 : 0x00000000L, 0x10000000L, 0x00010000L, 0x10010000L,
261 : 0x00000004L, 0x10000004L, 0x00010004L, 0x10010004L,
262 : 0x20000000L, 0x30000000L, 0x20010000L, 0x30010000L,
263 : 0x20000004L, 0x30000004L, 0x20010004L, 0x30010004L,
264 : 0x00100000L, 0x10100000L, 0x00110000L, 0x10110000L,
265 : 0x00100004L, 0x10100004L, 0x00110004L, 0x10110004L,
266 : 0x20100000L, 0x30100000L, 0x20110000L, 0x30110000L,
267 : 0x20100004L, 0x30100004L, 0x20110004L, 0x30110004L,
268 : 0x00001000L, 0x10001000L, 0x00011000L, 0x10011000L,
269 : 0x00001004L, 0x10001004L, 0x00011004L, 0x10011004L,
270 : 0x20001000L, 0x30001000L, 0x20011000L, 0x30011000L,
271 : 0x20001004L, 0x30001004L, 0x20011004L, 0x30011004L,
272 : 0x00101000L, 0x10101000L, 0x00111000L, 0x10111000L,
273 : 0x00101004L, 0x10101004L, 0x00111004L, 0x10111004L,
274 : 0x20101000L, 0x30101000L, 0x20111000L, 0x30111000L,
275 : 0x20101004L, 0x30101004L, 0x20111004L, 0x30111004L,
276 : },
277 : {
278 : /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
279 : 0x00000000L, 0x08000000L, 0x00000008L, 0x08000008L,
280 : 0x00000400L, 0x08000400L, 0x00000408L, 0x08000408L,
281 : 0x00020000L, 0x08020000L, 0x00020008L, 0x08020008L,
282 : 0x00020400L, 0x08020400L, 0x00020408L, 0x08020408L,
283 : 0x00000001L, 0x08000001L, 0x00000009L, 0x08000009L,
284 : 0x00000401L, 0x08000401L, 0x00000409L, 0x08000409L,
285 : 0x00020001L, 0x08020001L, 0x00020009L, 0x08020009L,
286 : 0x00020401L, 0x08020401L, 0x00020409L, 0x08020409L,
287 : 0x02000000L, 0x0A000000L, 0x02000008L, 0x0A000008L,
288 : 0x02000400L, 0x0A000400L, 0x02000408L, 0x0A000408L,
289 : 0x02020000L, 0x0A020000L, 0x02020008L, 0x0A020008L,
290 : 0x02020400L, 0x0A020400L, 0x02020408L, 0x0A020408L,
291 : 0x02000001L, 0x0A000001L, 0x02000009L, 0x0A000009L,
292 : 0x02000401L, 0x0A000401L, 0x02000409L, 0x0A000409L,
293 : 0x02020001L, 0x0A020001L, 0x02020009L, 0x0A020009L,
294 : 0x02020401L, 0x0A020401L, 0x02020409L, 0x0A020409L,
295 : },
296 : {
297 : /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
298 : 0x00000000L, 0x00000100L, 0x00080000L, 0x00080100L,
299 : 0x01000000L, 0x01000100L, 0x01080000L, 0x01080100L,
300 : 0x00000010L, 0x00000110L, 0x00080010L, 0x00080110L,
301 : 0x01000010L, 0x01000110L, 0x01080010L, 0x01080110L,
302 : 0x00200000L, 0x00200100L, 0x00280000L, 0x00280100L,
303 : 0x01200000L, 0x01200100L, 0x01280000L, 0x01280100L,
304 : 0x00200010L, 0x00200110L, 0x00280010L, 0x00280110L,
305 : 0x01200010L, 0x01200110L, 0x01280010L, 0x01280110L,
306 : 0x00000200L, 0x00000300L, 0x00080200L, 0x00080300L,
307 : 0x01000200L, 0x01000300L, 0x01080200L, 0x01080300L,
308 : 0x00000210L, 0x00000310L, 0x00080210L, 0x00080310L,
309 : 0x01000210L, 0x01000310L, 0x01080210L, 0x01080310L,
310 : 0x00200200L, 0x00200300L, 0x00280200L, 0x00280300L,
311 : 0x01200200L, 0x01200300L, 0x01280200L, 0x01280300L,
312 : 0x00200210L, 0x00200310L, 0x00280210L, 0x00280310L,
313 : 0x01200210L, 0x01200310L, 0x01280210L, 0x01280310L,
314 : },
315 : {
316 : /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
317 : 0x00000000L, 0x04000000L, 0x00040000L, 0x04040000L,
318 : 0x00000002L, 0x04000002L, 0x00040002L, 0x04040002L,
319 : 0x00002000L, 0x04002000L, 0x00042000L, 0x04042000L,
320 : 0x00002002L, 0x04002002L, 0x00042002L, 0x04042002L,
321 : 0x00000020L, 0x04000020L, 0x00040020L, 0x04040020L,
322 : 0x00000022L, 0x04000022L, 0x00040022L, 0x04040022L,
323 : 0x00002020L, 0x04002020L, 0x00042020L, 0x04042020L,
324 : 0x00002022L, 0x04002022L, 0x00042022L, 0x04042022L,
325 : 0x00000800L, 0x04000800L, 0x00040800L, 0x04040800L,
326 : 0x00000802L, 0x04000802L, 0x00040802L, 0x04040802L,
327 : 0x00002800L, 0x04002800L, 0x00042800L, 0x04042800L,
328 : 0x00002802L, 0x04002802L, 0x00042802L, 0x04042802L,
329 : 0x00000820L, 0x04000820L, 0x00040820L, 0x04040820L,
330 : 0x00000822L, 0x04000822L, 0x00040822L, 0x04040822L,
331 : 0x00002820L, 0x04002820L, 0x00042820L, 0x04042820L,
332 : 0x00002822L, 0x04002822L, 0x00042822L, 0x04042822L,
333 : }
334 : };
335 :
336 0 : int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule)
337 : {
338 0 : if (DES_check_key) {
339 0 : return DES_set_key_checked(key, schedule);
340 : } else {
341 0 : DES_set_key_unchecked(key, schedule);
342 0 : return 0;
343 : }
344 : }
345 :
346 : /*-
347 : * return 0 if key parity is odd (correct),
348 : * return -1 if key parity error,
349 : * return -2 if illegal weak key.
350 : */
351 0 : int DES_set_key_checked(const_DES_cblock *key, DES_key_schedule *schedule)
352 : {
353 0 : if (!DES_check_key_parity(key))
354 : return (-1);
355 0 : if (DES_is_weak_key(key))
356 : return (-2);
357 0 : DES_set_key_unchecked(key, schedule);
358 0 : return 0;
359 : }
360 :
361 0 : void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule)
362 : #ifdef OPENSSL_FIPS
363 : {
364 : fips_cipher_abort(DES);
365 : private_DES_set_key_unchecked(key, schedule);
366 : }
367 :
368 : void private_DES_set_key_unchecked(const_DES_cblock *key,
369 : DES_key_schedule *schedule)
370 : #endif
371 : {
372 : static const int shifts2[16] =
373 : { 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0 };
374 : register DES_LONG c, d, t, s, t2;
375 : register const unsigned char *in;
376 : register DES_LONG *k;
377 : register int i;
378 :
379 : #ifdef OPENBSD_DEV_CRYPTO
380 : memcpy(schedule->key, key, sizeof schedule->key);
381 : schedule->session = NULL;
382 : #endif
383 0 : k = &schedule->ks->deslong[0];
384 : in = &(*key)[0];
385 :
386 0 : c2l(in, c);
387 0 : c2l(in, d);
388 :
389 : /*
390 : * do PC1 in 47 simple operations :-) Thanks to John Fletcher
391 : * (john_fletcher@lccmail.ocf.llnl.gov) for the inspiration. :-)
392 : */
393 0 : PERM_OP(d, c, t, 4, 0x0f0f0f0fL);
394 0 : HPERM_OP(c, t, -2, 0xcccc0000L);
395 0 : HPERM_OP(d, t, -2, 0xcccc0000L);
396 0 : PERM_OP(d, c, t, 1, 0x55555555L);
397 0 : PERM_OP(c, d, t, 8, 0x00ff00ffL);
398 0 : PERM_OP(d, c, t, 1, 0x55555555L);
399 0 : d = (((d & 0x000000ffL) << 16L) | (d & 0x0000ff00L) |
400 0 : ((d & 0x00ff0000L) >> 16L) | ((c & 0xf0000000L) >> 4L));
401 0 : c &= 0x0fffffffL;
402 :
403 0 : for (i = 0; i < ITERATIONS; i++) {
404 0 : if (shifts2[i]) {
405 0 : c = ((c >> 2L) | (c << 26L));
406 0 : d = ((d >> 2L) | (d << 26L));
407 : } else {
408 0 : c = ((c >> 1L) | (c << 27L));
409 0 : d = ((d >> 1L) | (d << 27L));
410 : }
411 0 : c &= 0x0fffffffL;
412 0 : d &= 0x0fffffffL;
413 : /*
414 : * could be a few less shifts but I am to lazy at this point in time
415 : * to investigate
416 : */
417 0 : s = des_skb[0][(c) & 0x3f] |
418 0 : des_skb[1][((c >> 6L) & 0x03) | ((c >> 7L) & 0x3c)] |
419 0 : des_skb[2][((c >> 13L) & 0x0f) | ((c >> 14L) & 0x30)] |
420 0 : des_skb[3][((c >> 20L) & 0x01) | ((c >> 21L) & 0x06) |
421 0 : ((c >> 22L) & 0x38)];
422 0 : t = des_skb[4][(d) & 0x3f] |
423 0 : des_skb[5][((d >> 7L) & 0x03) | ((d >> 8L) & 0x3c)] |
424 0 : des_skb[6][(d >> 15L) & 0x3f] |
425 0 : des_skb[7][((d >> 21L) & 0x0f) | ((d >> 22L) & 0x30)];
426 :
427 : /* table contained 0213 4657 */
428 0 : t2 = ((t << 16L) | (s & 0x0000ffffL)) & 0xffffffffL;
429 0 : *(k++) = ROTATE(t2, 30) & 0xffffffffL;
430 :
431 0 : t2 = ((s >> 16L) | (t & 0xffff0000L));
432 0 : *(k++) = ROTATE(t2, 26) & 0xffffffffL;
433 : }
434 0 : }
435 :
436 0 : int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule)
437 : {
438 0 : return (DES_set_key(key, schedule));
439 : }
440 :
441 : /*-
442 : #undef des_fixup_key_parity
443 : void des_fixup_key_parity(des_cblock *key)
444 : {
445 : des_set_odd_parity(key);
446 : }
447 : */
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