1 /* crypto/des/set_key.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 68 #include <openssl/crypto.h> 69 70 OPENSSL_IMPLEMENT_GLOBAL(int,DES_check_key,0) /* defaults to false */ 71 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}; 89 90 void DES_set_odd_parity(DES_cblock *key) 91 { 92 unsigned int i; 93 94 for (i=0; i<DES_KEY_SZ; i++) 95 (*key)[i]=odd_parity[(*key)[i]]; 96 } 97 98 int DES_check_key_parity(const_DES_cblock *key) 99 { 100 unsigned int i; 101 102 for (i=0; i<DES_KEY_SZ; i++) 103 { 104 if ((*key)[i] != odd_parity[(*key)[i]]) 105 return(0); 106 } 107 return(1); 108 } 109 110 /* Weak and semi week keys as take from 111 * %A D.W. Davies 112 * %A W.L. Price 113 * %T Security for Computer Networks 114 * %I John Wiley & Sons 115 * %D 1984 116 * Many thanks to smb (at) ulysses.att.com (Steven Bellovin) for the reference 117 * (and actual cblock values). 118 */ 119 #define NUM_WEAK_KEY 16 120 static const DES_cblock weak_keys[NUM_WEAK_KEY]={ 121 /* weak keys */ 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}, 126 /* semi-weak keys */ 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}}; 139 140 int DES_is_weak_key(const_DES_cblock *key) 141 { 142 int i; 143 144 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 (at) MorningStar.Com for the fix 148 * eay 93/06/29 149 * Another problem, I was comparing only the first 4 150 * bytes, 97/03/18 */ 151 if (memcmp(weak_keys[i],key,sizeof(DES_cblock)) == 0) return(1); 152 return(0); 153 } 154 155 /* 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)),\ 158 * (b)^=(t),\ 159 * (a)=((a)^((t)<<(n)))) 160 */ 161 162 #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ 163 (a)=(a)^(t)^(t>>(16-(n)))) 164 165 static const DES_LONG des_skb[8][64]={ 166 { 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, 184 },{ 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, 202 },{ 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, 220 },{ 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, 238 },{ 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, 256 },{ 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, 274 },{ 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, 292 },{ 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, 310 }}; 311 312 int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule) 313 { 314 if (DES_check_key) 315 { 316 return DES_set_key_checked(key, schedule); 317 } 318 else 319 { 320 DES_set_key_unchecked(key, schedule); 321 return 0; 322 } 323 } 324 325 /* return 0 if key parity is odd (correct), 326 * return -1 if key parity error, 327 * return -2 if illegal weak key. 328 */ 329 int DES_set_key_checked(const_DES_cblock *key, DES_key_schedule *schedule) 330 { 331 if (!DES_check_key_parity(key)) 332 return(-1); 333 if (DES_is_weak_key(key)) 334 return(-2); 335 DES_set_key_unchecked(key, schedule); 336 return 0; 337 } 338 339 void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule) 340 #ifdef OPENSSL_FIPS 341 { 342 fips_cipher_abort(DES); 343 private_DES_set_key_unchecked(key, schedule); 344 } 345 void private_DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule) 346 #endif 347 { 348 static const int shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0}; 349 register DES_LONG c,d,t,s,t2; 350 register const unsigned char *in; 351 register DES_LONG *k; 352 register int i; 353 354 #ifdef OPENBSD_DEV_CRYPTO 355 memcpy(schedule->key,key,sizeof schedule->key); 356 schedule->session=NULL; 357 #endif 358 k = &schedule->ks->deslong[0]; 359 in = &(*key)[0]; 360 361 c2l(in,c); 362 c2l(in,d); 363 364 /* do PC1 in 47 simple operations :-) 365 * Thanks to John Fletcher (john_fletcher (at) lccmail.ocf.llnl.gov) 366 * for the inspiration. :-) */ 367 PERM_OP (d,c,t,4,0x0f0f0f0fL); 368 HPERM_OP(c,t,-2,0xcccc0000L); 369 HPERM_OP(d,t,-2,0xcccc0000L); 370 PERM_OP (d,c,t,1,0x55555555L); 371 PERM_OP (c,d,t,8,0x00ff00ffL); 372 PERM_OP (d,c,t,1,0x55555555L); 373 d= (((d&0x000000ffL)<<16L)| (d&0x0000ff00L) | 374 ((d&0x00ff0000L)>>16L)|((c&0xf0000000L)>>4L)); 375 c&=0x0fffffffL; 376 377 for (i=0; i<ITERATIONS; i++) 378 { 379 if (shifts2[i]) 380 { c=((c>>2L)|(c<<26L)); d=((d>>2L)|(d<<26L)); } 381 else 382 { c=((c>>1L)|(c<<27L)); d=((d>>1L)|(d<<27L)); } 383 c&=0x0fffffffL; 384 d&=0x0fffffffL; 385 /* could be a few less shifts but I am to lazy at this 386 * point in time to investigate */ 387 s= des_skb[0][ (c )&0x3f ]| 388 des_skb[1][((c>> 6L)&0x03)|((c>> 7L)&0x3c)]| 389 des_skb[2][((c>>13L)&0x0f)|((c>>14L)&0x30)]| 390 des_skb[3][((c>>20L)&0x01)|((c>>21L)&0x06) | 391 ((c>>22L)&0x38)]; 392 t= des_skb[4][ (d )&0x3f ]| 393 des_skb[5][((d>> 7L)&0x03)|((d>> 8L)&0x3c)]| 394 des_skb[6][ (d>>15L)&0x3f ]| 395 des_skb[7][((d>>21L)&0x0f)|((d>>22L)&0x30)]; 396 397 /* table contained 0213 4657 */ 398 t2=((t<<16L)|(s&0x0000ffffL))&0xffffffffL; 399 *(k++)=ROTATE(t2,30)&0xffffffffL; 400 401 t2=((s>>16L)|(t&0xffff0000L)); 402 *(k++)=ROTATE(t2,26)&0xffffffffL; 403 } 404 } 405 406 int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule) 407 { 408 return(DES_set_key(key,schedule)); 409 } 410 /* 411 #undef des_fixup_key_parity 412 void des_fixup_key_parity(des_cblock *key) 413 { 414 des_set_odd_parity(key); 415 } 416 */ 417
