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