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d02b48c6 | 1 | /* crypto/des/set_key.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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 | ||
c80fd6b2 MC |
59 | /*- |
60 | * set_key.c v 1.4 eay 24/9/91 | |
d02b48c6 RE |
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 | */ | |
d749e108 | 67 | #include <openssl/crypto.h> |
d02b48c6 | 68 | #include "des_locl.h" |
d02b48c6 | 69 | |
0f113f3e MC |
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 | }; | |
48b83a25 | 102 | |
c2e4f17c | 103 | void DES_set_odd_parity(DES_cblock *key) |
0f113f3e MC |
104 | { |
105 | unsigned int i; | |
d02b48c6 | 106 | |
0f113f3e MC |
107 | for (i = 0; i < DES_KEY_SZ; i++) |
108 | (*key)[i] = odd_parity[(*key)[i]]; | |
109 | } | |
d02b48c6 | 110 | |
c2e4f17c | 111 | int DES_check_key_parity(const_DES_cblock *key) |
0f113f3e MC |
112 | { |
113 | unsigned int i; | |
d02b48c6 | 114 | |
0f113f3e MC |
115 | for (i = 0; i < DES_KEY_SZ; i++) { |
116 | if ((*key)[i] != odd_parity[(*key)[i]]) | |
117 | return (0); | |
118 | } | |
119 | return (1); | |
120 | } | |
d02b48c6 | 121 | |
1d97c843 TH |
122 | /*- |
123 | * Weak and semi week keys as take from | |
d02b48c6 RE |
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 | */ | |
0f113f3e MC |
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 | }; | |
d02b48c6 | 153 | |
c2e4f17c | 154 | int DES_is_weak_key(const_DES_cblock *key) |
0f113f3e MC |
155 | { |
156 | int i; | |
d02b48c6 | 157 | |
0f113f3e MC |
158 | 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 | if (memcmp(weak_keys[i], key, sizeof(DES_cblock)) == 0) | |
166 | return (1); | |
167 | return (0); | |
168 | } | |
d02b48c6 | 169 | |
3a83462d MC |
170 | /*- |
171 | * NOW DEFINED IN des_local.h | |
0f113f3e | 172 | * See ecb_encrypt.c for a pseudo description of these macros. |
d02b48c6 | 173 | * #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ |
0f113f3e MC |
174 | * (b)^=(t),\ |
175 | * (a)=((a)^((t)<<(n)))) | |
d02b48c6 RE |
176 | */ |
177 | ||
178 | #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ | |
0f113f3e | 179 | (a)=(a)^(t)^(t>>(16-(n)))) |
d02b48c6 | 180 | |
0f113f3e MC |
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 | } | |
b853717f | 334 | }; |
48b83a25 | 335 | |
c2e4f17c | 336 | int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule) |
0f113f3e MC |
337 | { |
338 | if (DES_check_key) { | |
339 | return DES_set_key_checked(key, schedule); | |
340 | } else { | |
341 | DES_set_key_unchecked(key, schedule); | |
342 | return 0; | |
343 | } | |
344 | } | |
cddfe788 | 345 | |
3a83462d MC |
346 | /*- |
347 | * return 0 if key parity is odd (correct), | |
d02b48c6 RE |
348 | * return -1 if key parity error, |
349 | * return -2 if illegal weak key. | |
350 | */ | |
c2e4f17c | 351 | int DES_set_key_checked(const_DES_cblock *key, DES_key_schedule *schedule) |
0f113f3e MC |
352 | { |
353 | if (!DES_check_key_parity(key)) | |
354 | return (-1); | |
355 | if (DES_is_weak_key(key)) | |
356 | return (-2); | |
357 | DES_set_key_unchecked(key, schedule); | |
358 | return 0; | |
359 | } | |
cddfe788 | 360 | |
c2e4f17c | 361 | void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule) |
0f113f3e MC |
362 | { |
363 | static const int shifts2[16] = | |
364 | { 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0 }; | |
365 | register DES_LONG c, d, t, s, t2; | |
366 | register const unsigned char *in; | |
367 | register DES_LONG *k; | |
368 | register int i; | |
d02b48c6 | 369 | |
ba8fb521 | 370 | #ifdef OPENBSD_DEV_CRYPTO |
0f113f3e MC |
371 | memcpy(schedule->key, key, sizeof schedule->key); |
372 | schedule->session = NULL; | |
3ba5d1cf | 373 | #endif |
0f113f3e MC |
374 | k = &schedule->ks->deslong[0]; |
375 | in = &(*key)[0]; | |
d02b48c6 | 376 | |
0f113f3e MC |
377 | c2l(in, c); |
378 | c2l(in, d); | |
d02b48c6 | 379 | |
0f113f3e MC |
380 | /* |
381 | * do PC1 in 47 simple operations :-) Thanks to John Fletcher | |
382 | * (john_fletcher@lccmail.ocf.llnl.gov) for the inspiration. :-) | |
383 | */ | |
384 | PERM_OP(d, c, t, 4, 0x0f0f0f0fL); | |
385 | HPERM_OP(c, t, -2, 0xcccc0000L); | |
386 | HPERM_OP(d, t, -2, 0xcccc0000L); | |
387 | PERM_OP(d, c, t, 1, 0x55555555L); | |
388 | PERM_OP(c, d, t, 8, 0x00ff00ffL); | |
389 | PERM_OP(d, c, t, 1, 0x55555555L); | |
390 | d = (((d & 0x000000ffL) << 16L) | (d & 0x0000ff00L) | | |
391 | ((d & 0x00ff0000L) >> 16L) | ((c & 0xf0000000L) >> 4L)); | |
392 | c &= 0x0fffffffL; | |
d02b48c6 | 393 | |
0f113f3e MC |
394 | for (i = 0; i < ITERATIONS; i++) { |
395 | if (shifts2[i]) { | |
396 | c = ((c >> 2L) | (c << 26L)); | |
397 | d = ((d >> 2L) | (d << 26L)); | |
398 | } else { | |
399 | c = ((c >> 1L) | (c << 27L)); | |
400 | d = ((d >> 1L) | (d << 27L)); | |
401 | } | |
402 | c &= 0x0fffffffL; | |
403 | d &= 0x0fffffffL; | |
404 | /* | |
405 | * could be a few less shifts but I am to lazy at this point in time | |
406 | * to investigate | |
407 | */ | |
408 | s = des_skb[0][(c) & 0x3f] | | |
409 | des_skb[1][((c >> 6L) & 0x03) | ((c >> 7L) & 0x3c)] | | |
410 | des_skb[2][((c >> 13L) & 0x0f) | ((c >> 14L) & 0x30)] | | |
411 | des_skb[3][((c >> 20L) & 0x01) | ((c >> 21L) & 0x06) | | |
412 | ((c >> 22L) & 0x38)]; | |
413 | t = des_skb[4][(d) & 0x3f] | | |
414 | des_skb[5][((d >> 7L) & 0x03) | ((d >> 8L) & 0x3c)] | | |
415 | des_skb[6][(d >> 15L) & 0x3f] | | |
416 | des_skb[7][((d >> 21L) & 0x0f) | ((d >> 22L) & 0x30)]; | |
d02b48c6 | 417 | |
0f113f3e MC |
418 | /* table contained 0213 4657 */ |
419 | t2 = ((t << 16L) | (s & 0x0000ffffL)) & 0xffffffffL; | |
420 | *(k++) = ROTATE(t2, 30) & 0xffffffffL; | |
d02b48c6 | 421 | |
0f113f3e MC |
422 | t2 = ((s >> 16L) | (t & 0xffff0000L)); |
423 | *(k++) = ROTATE(t2, 26) & 0xffffffffL; | |
424 | } | |
425 | } | |
d02b48c6 | 426 | |
c2e4f17c | 427 | int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule) |
0f113f3e MC |
428 | { |
429 | return (DES_set_key(key, schedule)); | |
430 | } | |
431 | ||
1d97c843 | 432 | /*- |
edb93ae6 UM |
433 | #undef des_fixup_key_parity |
434 | void des_fixup_key_parity(des_cblock *key) | |
0f113f3e MC |
435 | { |
436 | des_set_odd_parity(key); | |
437 | } | |
1618bc79 | 438 | */ |