Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | /* 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 |
| 65 | */ |
| 66 | #include "des_locl.h" |
| 67 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 68 | OPENSSL_IMPLEMENT_GLOBAL(int,DES_check_key,0) /* defaults to false */ |
| 69 | |
| 70 | static const unsigned char odd_parity[256]={ |
| 71 | 1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14, |
| 72 | 16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31, |
| 73 | 32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47, |
| 74 | 49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62, |
| 75 | 64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79, |
| 76 | 81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94, |
| 77 | 97, 97, 98, 98,100,100,103,103,104,104,107,107,109,109,110,110, |
| 78 | 112,112,115,115,117,117,118,118,121,121,122,122,124,124,127,127, |
| 79 | 128,128,131,131,133,133,134,134,137,137,138,138,140,140,143,143, |
| 80 | 145,145,146,146,148,148,151,151,152,152,155,155,157,157,158,158, |
| 81 | 161,161,162,162,164,164,167,167,168,168,171,171,173,173,174,174, |
| 82 | 176,176,179,179,181,181,182,182,185,185,186,186,188,188,191,191, |
| 83 | 193,193,194,194,196,196,199,199,200,200,203,203,205,205,206,206, |
| 84 | 208,208,211,211,213,213,214,214,217,217,218,218,220,220,223,223, |
| 85 | 224,224,227,227,229,229,230,230,233,233,234,234,236,236,239,239, |
| 86 | 241,241,242,242,244,244,247,247,248,248,251,251,253,253,254,254}; |
| 87 | |
| 88 | void DES_set_odd_parity(DES_cblock *key) |
| 89 | { |
| 90 | unsigned int i; |
| 91 | |
| 92 | for (i=0; i<DES_KEY_SZ; i++) |
| 93 | (*key)[i]=odd_parity[(*key)[i]]; |
| 94 | } |
| 95 | |
| 96 | int DES_check_key_parity(const_DES_cblock *key) |
| 97 | { |
| 98 | unsigned int i; |
| 99 | |
| 100 | for (i=0; i<DES_KEY_SZ; i++) |
| 101 | { |
| 102 | if ((*key)[i] != odd_parity[(*key)[i]]) |
| 103 | return(0); |
| 104 | } |
| 105 | return(1); |
| 106 | } |
| 107 | |
| 108 | /* Weak and semi week keys as take from |
| 109 | * %A D.W. Davies |
| 110 | * %A W.L. Price |
| 111 | * %T Security for Computer Networks |
| 112 | * %I John Wiley & Sons |
| 113 | * %D 1984 |
| 114 | * Many thanks to smb@ulysses.att.com (Steven Bellovin) for the reference |
| 115 | * (and actual cblock values). |
| 116 | */ |
| 117 | #define NUM_WEAK_KEY 16 |
| 118 | static const DES_cblock weak_keys[NUM_WEAK_KEY]={ |
| 119 | /* weak keys */ |
| 120 | {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01}, |
| 121 | {0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE}, |
| 122 | {0x1F,0x1F,0x1F,0x1F,0x0E,0x0E,0x0E,0x0E}, |
| 123 | {0xE0,0xE0,0xE0,0xE0,0xF1,0xF1,0xF1,0xF1}, |
| 124 | /* semi-weak keys */ |
| 125 | {0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE}, |
| 126 | {0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01}, |
| 127 | {0x1F,0xE0,0x1F,0xE0,0x0E,0xF1,0x0E,0xF1}, |
| 128 | {0xE0,0x1F,0xE0,0x1F,0xF1,0x0E,0xF1,0x0E}, |
| 129 | {0x01,0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1}, |
| 130 | {0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1,0x01}, |
| 131 | {0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E,0xFE}, |
| 132 | {0xFE,0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E}, |
| 133 | {0x01,0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E}, |
| 134 | {0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E,0x01}, |
| 135 | {0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1,0xFE}, |
| 136 | {0xFE,0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1}}; |
| 137 | |
| 138 | int DES_is_weak_key(const_DES_cblock *key) |
| 139 | { |
| 140 | int i; |
| 141 | |
| 142 | for (i=0; i<NUM_WEAK_KEY; i++) |
| 143 | /* Added == 0 to comparison, I obviously don't run |
| 144 | * this section very often :-(, thanks to |
| 145 | * engineering@MorningStar.Com for the fix |
| 146 | * eay 93/06/29 |
| 147 | * Another problem, I was comparing only the first 4 |
| 148 | * bytes, 97/03/18 */ |
| 149 | if (memcmp(weak_keys[i],key,sizeof(DES_cblock)) == 0) return(1); |
| 150 | return(0); |
| 151 | } |
| 152 | |
| 153 | /* NOW DEFINED IN des_local.h |
| 154 | * See ecb_encrypt.c for a pseudo description of these macros. |
| 155 | * #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ |
| 156 | * (b)^=(t),\ |
| 157 | * (a)=((a)^((t)<<(n)))) |
| 158 | */ |
| 159 | |
| 160 | #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ |
| 161 | (a)=(a)^(t)^(t>>(16-(n)))) |
| 162 | |
| 163 | static const DES_LONG des_skb[8][64]={ |
| 164 | { |
| 165 | /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */ |
| 166 | 0x00000000L,0x00000010L,0x20000000L,0x20000010L, |
| 167 | 0x00010000L,0x00010010L,0x20010000L,0x20010010L, |
| 168 | 0x00000800L,0x00000810L,0x20000800L,0x20000810L, |
| 169 | 0x00010800L,0x00010810L,0x20010800L,0x20010810L, |
| 170 | 0x00000020L,0x00000030L,0x20000020L,0x20000030L, |
| 171 | 0x00010020L,0x00010030L,0x20010020L,0x20010030L, |
| 172 | 0x00000820L,0x00000830L,0x20000820L,0x20000830L, |
| 173 | 0x00010820L,0x00010830L,0x20010820L,0x20010830L, |
| 174 | 0x00080000L,0x00080010L,0x20080000L,0x20080010L, |
| 175 | 0x00090000L,0x00090010L,0x20090000L,0x20090010L, |
| 176 | 0x00080800L,0x00080810L,0x20080800L,0x20080810L, |
| 177 | 0x00090800L,0x00090810L,0x20090800L,0x20090810L, |
| 178 | 0x00080020L,0x00080030L,0x20080020L,0x20080030L, |
| 179 | 0x00090020L,0x00090030L,0x20090020L,0x20090030L, |
| 180 | 0x00080820L,0x00080830L,0x20080820L,0x20080830L, |
| 181 | 0x00090820L,0x00090830L,0x20090820L,0x20090830L, |
| 182 | },{ |
| 183 | /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */ |
| 184 | 0x00000000L,0x02000000L,0x00002000L,0x02002000L, |
| 185 | 0x00200000L,0x02200000L,0x00202000L,0x02202000L, |
| 186 | 0x00000004L,0x02000004L,0x00002004L,0x02002004L, |
| 187 | 0x00200004L,0x02200004L,0x00202004L,0x02202004L, |
| 188 | 0x00000400L,0x02000400L,0x00002400L,0x02002400L, |
| 189 | 0x00200400L,0x02200400L,0x00202400L,0x02202400L, |
| 190 | 0x00000404L,0x02000404L,0x00002404L,0x02002404L, |
| 191 | 0x00200404L,0x02200404L,0x00202404L,0x02202404L, |
| 192 | 0x10000000L,0x12000000L,0x10002000L,0x12002000L, |
| 193 | 0x10200000L,0x12200000L,0x10202000L,0x12202000L, |
| 194 | 0x10000004L,0x12000004L,0x10002004L,0x12002004L, |
| 195 | 0x10200004L,0x12200004L,0x10202004L,0x12202004L, |
| 196 | 0x10000400L,0x12000400L,0x10002400L,0x12002400L, |
| 197 | 0x10200400L,0x12200400L,0x10202400L,0x12202400L, |
| 198 | 0x10000404L,0x12000404L,0x10002404L,0x12002404L, |
| 199 | 0x10200404L,0x12200404L,0x10202404L,0x12202404L, |
| 200 | },{ |
| 201 | /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */ |
| 202 | 0x00000000L,0x00000001L,0x00040000L,0x00040001L, |
| 203 | 0x01000000L,0x01000001L,0x01040000L,0x01040001L, |
| 204 | 0x00000002L,0x00000003L,0x00040002L,0x00040003L, |
| 205 | 0x01000002L,0x01000003L,0x01040002L,0x01040003L, |
| 206 | 0x00000200L,0x00000201L,0x00040200L,0x00040201L, |
| 207 | 0x01000200L,0x01000201L,0x01040200L,0x01040201L, |
| 208 | 0x00000202L,0x00000203L,0x00040202L,0x00040203L, |
| 209 | 0x01000202L,0x01000203L,0x01040202L,0x01040203L, |
| 210 | 0x08000000L,0x08000001L,0x08040000L,0x08040001L, |
| 211 | 0x09000000L,0x09000001L,0x09040000L,0x09040001L, |
| 212 | 0x08000002L,0x08000003L,0x08040002L,0x08040003L, |
| 213 | 0x09000002L,0x09000003L,0x09040002L,0x09040003L, |
| 214 | 0x08000200L,0x08000201L,0x08040200L,0x08040201L, |
| 215 | 0x09000200L,0x09000201L,0x09040200L,0x09040201L, |
| 216 | 0x08000202L,0x08000203L,0x08040202L,0x08040203L, |
| 217 | 0x09000202L,0x09000203L,0x09040202L,0x09040203L, |
| 218 | },{ |
| 219 | /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */ |
| 220 | 0x00000000L,0x00100000L,0x00000100L,0x00100100L, |
| 221 | 0x00000008L,0x00100008L,0x00000108L,0x00100108L, |
| 222 | 0x00001000L,0x00101000L,0x00001100L,0x00101100L, |
| 223 | 0x00001008L,0x00101008L,0x00001108L,0x00101108L, |
| 224 | 0x04000000L,0x04100000L,0x04000100L,0x04100100L, |
| 225 | 0x04000008L,0x04100008L,0x04000108L,0x04100108L, |
| 226 | 0x04001000L,0x04101000L,0x04001100L,0x04101100L, |
| 227 | 0x04001008L,0x04101008L,0x04001108L,0x04101108L, |
| 228 | 0x00020000L,0x00120000L,0x00020100L,0x00120100L, |
| 229 | 0x00020008L,0x00120008L,0x00020108L,0x00120108L, |
| 230 | 0x00021000L,0x00121000L,0x00021100L,0x00121100L, |
| 231 | 0x00021008L,0x00121008L,0x00021108L,0x00121108L, |
| 232 | 0x04020000L,0x04120000L,0x04020100L,0x04120100L, |
| 233 | 0x04020008L,0x04120008L,0x04020108L,0x04120108L, |
| 234 | 0x04021000L,0x04121000L,0x04021100L,0x04121100L, |
| 235 | 0x04021008L,0x04121008L,0x04021108L,0x04121108L, |
| 236 | },{ |
| 237 | /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */ |
| 238 | 0x00000000L,0x10000000L,0x00010000L,0x10010000L, |
| 239 | 0x00000004L,0x10000004L,0x00010004L,0x10010004L, |
| 240 | 0x20000000L,0x30000000L,0x20010000L,0x30010000L, |
| 241 | 0x20000004L,0x30000004L,0x20010004L,0x30010004L, |
| 242 | 0x00100000L,0x10100000L,0x00110000L,0x10110000L, |
| 243 | 0x00100004L,0x10100004L,0x00110004L,0x10110004L, |
| 244 | 0x20100000L,0x30100000L,0x20110000L,0x30110000L, |
| 245 | 0x20100004L,0x30100004L,0x20110004L,0x30110004L, |
| 246 | 0x00001000L,0x10001000L,0x00011000L,0x10011000L, |
| 247 | 0x00001004L,0x10001004L,0x00011004L,0x10011004L, |
| 248 | 0x20001000L,0x30001000L,0x20011000L,0x30011000L, |
| 249 | 0x20001004L,0x30001004L,0x20011004L,0x30011004L, |
| 250 | 0x00101000L,0x10101000L,0x00111000L,0x10111000L, |
| 251 | 0x00101004L,0x10101004L,0x00111004L,0x10111004L, |
| 252 | 0x20101000L,0x30101000L,0x20111000L,0x30111000L, |
| 253 | 0x20101004L,0x30101004L,0x20111004L,0x30111004L, |
| 254 | },{ |
| 255 | /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */ |
| 256 | 0x00000000L,0x08000000L,0x00000008L,0x08000008L, |
| 257 | 0x00000400L,0x08000400L,0x00000408L,0x08000408L, |
| 258 | 0x00020000L,0x08020000L,0x00020008L,0x08020008L, |
| 259 | 0x00020400L,0x08020400L,0x00020408L,0x08020408L, |
| 260 | 0x00000001L,0x08000001L,0x00000009L,0x08000009L, |
| 261 | 0x00000401L,0x08000401L,0x00000409L,0x08000409L, |
| 262 | 0x00020001L,0x08020001L,0x00020009L,0x08020009L, |
| 263 | 0x00020401L,0x08020401L,0x00020409L,0x08020409L, |
| 264 | 0x02000000L,0x0A000000L,0x02000008L,0x0A000008L, |
| 265 | 0x02000400L,0x0A000400L,0x02000408L,0x0A000408L, |
| 266 | 0x02020000L,0x0A020000L,0x02020008L,0x0A020008L, |
| 267 | 0x02020400L,0x0A020400L,0x02020408L,0x0A020408L, |
| 268 | 0x02000001L,0x0A000001L,0x02000009L,0x0A000009L, |
| 269 | 0x02000401L,0x0A000401L,0x02000409L,0x0A000409L, |
| 270 | 0x02020001L,0x0A020001L,0x02020009L,0x0A020009L, |
| 271 | 0x02020401L,0x0A020401L,0x02020409L,0x0A020409L, |
| 272 | },{ |
| 273 | /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */ |
| 274 | 0x00000000L,0x00000100L,0x00080000L,0x00080100L, |
| 275 | 0x01000000L,0x01000100L,0x01080000L,0x01080100L, |
| 276 | 0x00000010L,0x00000110L,0x00080010L,0x00080110L, |
| 277 | 0x01000010L,0x01000110L,0x01080010L,0x01080110L, |
| 278 | 0x00200000L,0x00200100L,0x00280000L,0x00280100L, |
| 279 | 0x01200000L,0x01200100L,0x01280000L,0x01280100L, |
| 280 | 0x00200010L,0x00200110L,0x00280010L,0x00280110L, |
| 281 | 0x01200010L,0x01200110L,0x01280010L,0x01280110L, |
| 282 | 0x00000200L,0x00000300L,0x00080200L,0x00080300L, |
| 283 | 0x01000200L,0x01000300L,0x01080200L,0x01080300L, |
| 284 | 0x00000210L,0x00000310L,0x00080210L,0x00080310L, |
| 285 | 0x01000210L,0x01000310L,0x01080210L,0x01080310L, |
| 286 | 0x00200200L,0x00200300L,0x00280200L,0x00280300L, |
| 287 | 0x01200200L,0x01200300L,0x01280200L,0x01280300L, |
| 288 | 0x00200210L,0x00200310L,0x00280210L,0x00280310L, |
| 289 | 0x01200210L,0x01200310L,0x01280210L,0x01280310L, |
| 290 | },{ |
| 291 | /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */ |
| 292 | 0x00000000L,0x04000000L,0x00040000L,0x04040000L, |
| 293 | 0x00000002L,0x04000002L,0x00040002L,0x04040002L, |
| 294 | 0x00002000L,0x04002000L,0x00042000L,0x04042000L, |
| 295 | 0x00002002L,0x04002002L,0x00042002L,0x04042002L, |
| 296 | 0x00000020L,0x04000020L,0x00040020L,0x04040020L, |
| 297 | 0x00000022L,0x04000022L,0x00040022L,0x04040022L, |
| 298 | 0x00002020L,0x04002020L,0x00042020L,0x04042020L, |
| 299 | 0x00002022L,0x04002022L,0x00042022L,0x04042022L, |
| 300 | 0x00000800L,0x04000800L,0x00040800L,0x04040800L, |
| 301 | 0x00000802L,0x04000802L,0x00040802L,0x04040802L, |
| 302 | 0x00002800L,0x04002800L,0x00042800L,0x04042800L, |
| 303 | 0x00002802L,0x04002802L,0x00042802L,0x04042802L, |
| 304 | 0x00000820L,0x04000820L,0x00040820L,0x04040820L, |
| 305 | 0x00000822L,0x04000822L,0x00040822L,0x04040822L, |
| 306 | 0x00002820L,0x04002820L,0x00042820L,0x04042820L, |
| 307 | 0x00002822L,0x04002822L,0x00042822L,0x04042822L, |
| 308 | }}; |
| 309 | |
| 310 | int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule) |
| 311 | { |
| 312 | if (DES_check_key) |
| 313 | { |
| 314 | return DES_set_key_checked(key, schedule); |
| 315 | } |
| 316 | else |
| 317 | { |
| 318 | DES_set_key_unchecked(key, schedule); |
| 319 | return 0; |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | /* return 0 if key parity is odd (correct), |
| 324 | * return -1 if key parity error, |
| 325 | * return -2 if illegal weak key. |
| 326 | */ |
| 327 | int DES_set_key_checked(const_DES_cblock *key, DES_key_schedule *schedule) |
| 328 | { |
| 329 | if (!DES_check_key_parity(key)) |
| 330 | return(-1); |
| 331 | if (DES_is_weak_key(key)) |
| 332 | return(-2); |
| 333 | DES_set_key_unchecked(key, schedule); |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 338 | { |
| 339 | static const int shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0}; |
| 340 | register DES_LONG c,d,t,s,t2; |
| 341 | register const unsigned char *in; |
| 342 | register DES_LONG *k; |
| 343 | register int i; |
| 344 | |
| 345 | #ifdef OPENBSD_DEV_CRYPTO |
| 346 | memcpy(schedule->key,key,sizeof schedule->key); |
| 347 | schedule->session=NULL; |
| 348 | #endif |
| 349 | k = &schedule->ks->deslong[0]; |
| 350 | in = &(*key)[0]; |
| 351 | |
| 352 | c2l(in,c); |
| 353 | c2l(in,d); |
| 354 | |
| 355 | /* do PC1 in 47 simple operations :-) |
| 356 | * Thanks to John Fletcher (john_fletcher@lccmail.ocf.llnl.gov) |
| 357 | * for the inspiration. :-) */ |
| 358 | PERM_OP (d,c,t,4,0x0f0f0f0fL); |
| 359 | HPERM_OP(c,t,-2,0xcccc0000L); |
| 360 | HPERM_OP(d,t,-2,0xcccc0000L); |
| 361 | PERM_OP (d,c,t,1,0x55555555L); |
| 362 | PERM_OP (c,d,t,8,0x00ff00ffL); |
| 363 | PERM_OP (d,c,t,1,0x55555555L); |
| 364 | d= (((d&0x000000ffL)<<16L)| (d&0x0000ff00L) | |
| 365 | ((d&0x00ff0000L)>>16L)|((c&0xf0000000L)>>4L)); |
| 366 | c&=0x0fffffffL; |
| 367 | |
| 368 | for (i=0; i<ITERATIONS; i++) |
| 369 | { |
| 370 | if (shifts2[i]) |
| 371 | { c=((c>>2L)|(c<<26L)); d=((d>>2L)|(d<<26L)); } |
| 372 | else |
| 373 | { c=((c>>1L)|(c<<27L)); d=((d>>1L)|(d<<27L)); } |
| 374 | c&=0x0fffffffL; |
| 375 | d&=0x0fffffffL; |
| 376 | /* could be a few less shifts but I am to lazy at this |
| 377 | * point in time to investigate */ |
| 378 | s= des_skb[0][ (c )&0x3f ]| |
| 379 | des_skb[1][((c>> 6L)&0x03)|((c>> 7L)&0x3c)]| |
| 380 | des_skb[2][((c>>13L)&0x0f)|((c>>14L)&0x30)]| |
| 381 | des_skb[3][((c>>20L)&0x01)|((c>>21L)&0x06) | |
| 382 | ((c>>22L)&0x38)]; |
| 383 | t= des_skb[4][ (d )&0x3f ]| |
| 384 | des_skb[5][((d>> 7L)&0x03)|((d>> 8L)&0x3c)]| |
| 385 | des_skb[6][ (d>>15L)&0x3f ]| |
| 386 | des_skb[7][((d>>21L)&0x0f)|((d>>22L)&0x30)]; |
| 387 | |
| 388 | /* table contained 0213 4657 */ |
| 389 | t2=((t<<16L)|(s&0x0000ffffL))&0xffffffffL; |
| 390 | *(k++)=ROTATE(t2,30)&0xffffffffL; |
| 391 | |
| 392 | t2=((s>>16L)|(t&0xffff0000L)); |
| 393 | *(k++)=ROTATE(t2,26)&0xffffffffL; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule) |
| 398 | { |
| 399 | return(DES_set_key(key,schedule)); |
| 400 | } |
| 401 | /* |
| 402 | #undef des_fixup_key_parity |
| 403 | void des_fixup_key_parity(des_cblock *key) |
| 404 | { |
| 405 | des_set_odd_parity(key); |
| 406 | } |
| 407 | */ |