1 /* crypto/des/des_locl.h */
2 /* Copyright (C) 1995-1997 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 #ifndef HEADER_DES_LOCL_H
60 #define HEADER_DES_LOCL_H
61
62 #include <openssl/e_os2.h>
63
64 #if defined(OPENSSL_SYS_WIN32)
65 #ifndef OPENSSL_SYS_MSDOS
66 #define OPENSSL_SYS_MSDOS
67 #endif
68 #endif
69
70 #include <stdio.h>
71 #include <stdlib.h>
72
73 #ifndef OPENSSL_SYS_MSDOS
74 #if !defined(OPENSSL_SYS_VMS) || defined(__DECC)
75 #ifdef OPENSSL_UNISTD
76 # include OPENSSL_UNISTD
77 #else
78 # include <unistd.h>
79 #endif
80 #include <math.h>
81 #endif
82 #endif
83 #include <openssl/des.h>
84
85 #ifdef OPENSSL_SYS_MSDOS /* Visual C++ 2.1 (Windows NT/95) */
86 #include <stdlib.h>
87 #include <errno.h>
88 #include <time.h>
89 #include <io.h>
90 #endif
91
92 #if defined(__STDC__) || defined(OPENSSL_SYS_VMS) || defined(M_XENIX) || defined(OPENSSL_SYS_MSDOS)
93 #include <string.h>
94 #endif
95
96 #ifdef OPENSSL_BUILD_SHLIBCRYPTO
97 # undef OPENSSL_EXTERN
98 # define OPENSSL_EXTERN OPENSSL_EXPORT
99 #endif
100
101 #define ITERATIONS 16
102 #define HALF_ITERATIONS 8
103
104 /* used in des_read and des_write */
105 #define MAXWRITE (1024*16)
106 #define BSIZE (MAXWRITE+4)
107
108 #define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
109 l|=((DES_LONG)(*((c)++)))<< 8L, \
110 l|=((DES_LONG)(*((c)++)))<<16L, \
111 l|=((DES_LONG)(*((c)++)))<<24L)
112
113 /* NOTE - c is not incremented as per c2l */
114 #define c2ln(c,l1,l2,n) { \
115 c+=n; \
116 l1=l2=0; \
117 switch (n) { \
118 case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \
119 case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \
120 case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \
121 case 5: l2|=((DES_LONG)(*(--(c)))); \
122 case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \
123 case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \
124 case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \
125 case 1: l1|=((DES_LONG)(*(--(c)))); \
126 } \
127 }
128
129 #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
130 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
131 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
132 *((c)++)=(unsigned char)(((l)>>24L)&0xff))
133
134 /* replacements for htonl and ntohl since I have no idea what to do
135 * when faced with machines with 8 byte longs. */
136 #define HDRSIZE 4
137
138 #define n2l(c,l) (l =((DES_LONG)(*((c)++)))<<24L, \
139 l|=((DES_LONG)(*((c)++)))<<16L, \
140 l|=((DES_LONG)(*((c)++)))<< 8L, \
141 l|=((DES_LONG)(*((c)++))))
142
143 #define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
144 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
145 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
146 *((c)++)=(unsigned char)(((l) )&0xff))
147
148 /* NOTE - c is not incremented as per l2c */
149 #define l2cn(l1,l2,c,n) { \
150 c+=n; \
151 switch (n) { \
152 case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
153 case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
154 case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
155 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
156 case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
157 case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
158 case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
159 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
160 } \
161 }
162
163 #if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)) || defined(__ICC)
164 #define ROTATE(a,n) (_lrotr(a,n))
165 #elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC)
166 # if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
167 # define ROTATE(a,n) ({ register unsigned int ret; \
168 __asm__ ("rorl %1,%0" \
169 : "=r"(ret) \
170 : "I"(n),"0"(a) \
171 : "cc"); \
172 ret; \
173 })
174 # endif
175 #endif
176 #ifndef ROTATE
177 #define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n))))
178 #endif
179
180 /* Don't worry about the LOAD_DATA() stuff, that is used by
181 * fcrypt() to add it's little bit to the front */
182
183 #ifdef DES_FCRYPT
184
185 #define LOAD_DATA_tmp(R,S,u,t,E0,E1) \
186 { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); }
187
188 #define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
189 t=R^(R>>16L); \
190 u=t&E0; t&=E1; \
191 tmp=(u<<16); u^=R^s[S ]; u^=tmp; \
192 tmp=(t<<16); t^=R^s[S+1]; t^=tmp
193 #else
194 #define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g)
195 #define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
196 u=R^s[S ]; \
197 t=R^s[S+1]
198 #endif
199
200 /* The changes to this macro may help or hinder, depending on the
201 * compiler and the architecture. gcc2 always seems to do well :-).
202 * Inspired by Dana How <how@isl.stanford.edu>
203 * DO NOT use the alternative version on machines with 8 byte longs.
204 * It does not seem to work on the Alpha, even when DES_LONG is 4
205 * bytes, probably an issue of accessing non-word aligned objects :-( */
206 #ifdef DES_PTR
207
208 /* It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there
209 * is no reason to not xor all the sub items together. This potentially
210 * saves a register since things can be xored directly into L */
211
212 #if defined(DES_RISC1) || defined(DES_RISC2)
213 #ifdef DES_RISC1
214 #define D_ENCRYPT(LL,R,S) { \
215 unsigned int u1,u2,u3; \
216 LOAD_DATA(R,S,u,t,E0,E1,u1); \
217 u2=(int)u>>8L; \
218 u1=(int)u&0xfc; \
219 u2&=0xfc; \
220 t=ROTATE(t,4); \
221 u>>=16L; \
222 LL^= *(const DES_LONG *)(des_SP +u1); \
223 LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
224 u3=(int)(u>>8L); \
225 u1=(int)u&0xfc; \
226 u3&=0xfc; \
227 LL^= *(const DES_LONG *)(des_SP+0x400+u1); \
228 LL^= *(const DES_LONG *)(des_SP+0x600+u3); \
229 u2=(int)t>>8L; \
230 u1=(int)t&0xfc; \
231 u2&=0xfc; \
232 t>>=16L; \
233 LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
234 LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
235 u3=(int)t>>8L; \
236 u1=(int)t&0xfc; \
237 u3&=0xfc; \
238 LL^= *(const DES_LONG *)(des_SP+0x500+u1); \
239 LL^= *(const DES_LONG *)(des_SP+0x700+u3); }
240 #endif
241 #ifdef DES_RISC2
242 #define D_ENCRYPT(LL,R,S) { \
243 unsigned int u1,u2,s1,s2; \
244 LOAD_DATA(R,S,u,t,E0,E1,u1); \
245 u2=(int)u>>8L; \
246 u1=(int)u&0xfc; \
247 u2&=0xfc; \
248 t=ROTATE(t,4); \
249 LL^= *(const DES_LONG *)(des_SP +u1); \
250 LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
251 s1=(int)(u>>16L); \
252 s2=(int)(u>>24L); \
253 s1&=0xfc; \
254 s2&=0xfc; \
255 LL^= *(const DES_LONG *)(des_SP+0x400+s1); \
256 LL^= *(const DES_LONG *)(des_SP+0x600+s2); \
257 u2=(int)t>>8L; \
258 u1=(int)t&0xfc; \
259 u2&=0xfc; \
260 LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
261 LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
262 s1=(int)(t>>16L); \
263 s2=(int)(t>>24L); \
264 s1&=0xfc; \
265 s2&=0xfc; \
266 LL^= *(const DES_LONG *)(des_SP+0x500+s1); \
267 LL^= *(const DES_LONG *)(des_SP+0x700+s2); }
268 #endif
269 #else
270 #define D_ENCRYPT(LL,R,S) { \
271 LOAD_DATA_tmp(R,S,u,t,E0,E1); \
272 t=ROTATE(t,4); \
273 LL^= \
274 *(const DES_LONG *)(des_SP +((u )&0xfc))^ \
275 *(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \
276 *(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \
277 *(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \
278 *(const DES_LONG *)(des_SP+0x100+((t )&0xfc))^ \
279 *(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \
280 *(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \
281 *(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); }
282 #endif
283
284 #else /* original version */
285
286 #if defined(DES_RISC1) || defined(DES_RISC2)
287 #ifdef DES_RISC1
288 #define D_ENCRYPT(LL,R,S) {\
289 unsigned int u1,u2,u3; \
290 LOAD_DATA(R,S,u,t,E0,E1,u1); \
291 u>>=2L; \
292 t=ROTATE(t,6); \
293 u2=(int)u>>8L; \
294 u1=(int)u&0x3f; \
295 u2&=0x3f; \
296 u>>=16L; \
297 LL^=DES_SPtrans[0][u1]; \
298 LL^=DES_SPtrans[2][u2]; \
299 u3=(int)u>>8L; \
300 u1=(int)u&0x3f; \
301 u3&=0x3f; \
302 LL^=DES_SPtrans[4][u1]; \
303 LL^=DES_SPtrans[6][u3]; \
304 u2=(int)t>>8L; \
305 u1=(int)t&0x3f; \
306 u2&=0x3f; \
307 t>>=16L; \
308 LL^=DES_SPtrans[1][u1]; \
309 LL^=DES_SPtrans[3][u2]; \
310 u3=(int)t>>8L; \
311 u1=(int)t&0x3f; \
312 u3&=0x3f; \
313 LL^=DES_SPtrans[5][u1]; \
314 LL^=DES_SPtrans[7][u3]; }
315 #endif
316 #ifdef DES_RISC2
317 #define D_ENCRYPT(LL,R,S) {\
318 unsigned int u1,u2,s1,s2; \
319 LOAD_DATA(R,S,u,t,E0,E1,u1); \
320 u>>=2L; \
321 t=ROTATE(t,6); \
322 u2=(int)u>>8L; \
323 u1=(int)u&0x3f; \
324 u2&=0x3f; \
325 LL^=DES_SPtrans[0][u1]; \
326 LL^=DES_SPtrans[2][u2]; \
327 s1=(int)u>>16L; \
328 s2=(int)u>>24L; \
329 s1&=0x3f; \
330 s2&=0x3f; \
331 LL^=DES_SPtrans[4][s1]; \
332 LL^=DES_SPtrans[6][s2]; \
333 u2=(int)t>>8L; \
334 u1=(int)t&0x3f; \
335 u2&=0x3f; \
336 LL^=DES_SPtrans[1][u1]; \
337 LL^=DES_SPtrans[3][u2]; \
338 s1=(int)t>>16; \
339 s2=(int)t>>24L; \
340 s1&=0x3f; \
341 s2&=0x3f; \
342 LL^=DES_SPtrans[5][s1]; \
343 LL^=DES_SPtrans[7][s2]; }
344 #endif
345
346 #else
347
348 #define D_ENCRYPT(LL,R,S) {\
349 LOAD_DATA_tmp(R,S,u,t,E0,E1); \
350 t=ROTATE(t,4); \
351 LL^=\
352 DES_SPtrans[0][(u>> 2L)&0x3f]^ \
353 DES_SPtrans[2][(u>>10L)&0x3f]^ \
354 DES_SPtrans[4][(u>>18L)&0x3f]^ \
355 DES_SPtrans[6][(u>>26L)&0x3f]^ \
356 DES_SPtrans[1][(t>> 2L)&0x3f]^ \
357 DES_SPtrans[3][(t>>10L)&0x3f]^ \
358 DES_SPtrans[5][(t>>18L)&0x3f]^ \
359 DES_SPtrans[7][(t>>26L)&0x3f]; }
360 #endif
361 #endif
362
363 /* IP and FP
364 * The problem is more of a geometric problem that random bit fiddling.
365 0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6
366 8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4
367 16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2
368 24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0
369
370 32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7
371 40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5
372 48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3
373 56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1
374
375 The output has been subject to swaps of the form
376 0 1 -> 3 1 but the odd and even bits have been put into
377 2 3 2 0
378 different words. The main trick is to remember that
379 t=((l>>size)^r)&(mask);
380 r^=t;
381 l^=(t<<size);
382 can be used to swap and move bits between words.
383
384 So l = 0 1 2 3 r = 16 17 18 19
385 4 5 6 7 20 21 22 23
386 8 9 10 11 24 25 26 27
387 12 13 14 15 28 29 30 31
388 becomes (for size == 2 and mask == 0x3333)
389 t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19
390 6^20 7^21 -- -- 4 5 20 21 6 7 22 23
391 10^24 11^25 -- -- 8 9 24 25 10 11 24 25
392 14^28 15^29 -- -- 12 13 28 29 14 15 28 29
393
394 Thanks for hints from Richard Outerbridge - he told me IP&FP
395 could be done in 15 xor, 10 shifts and 5 ands.
396 When I finally started to think of the problem in 2D
397 I first got ~42 operations without xors. When I remembered
398 how to use xors :-) I got it to its final state.
399 */
400 #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
401 (b)^=(t),\
402 (a)^=((t)<<(n)))
403
404 #define IP(l,r) \
405 { \
406 register DES_LONG tt; \
407 PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \
408 PERM_OP(l,r,tt,16,0x0000ffffL); \
409 PERM_OP(r,l,tt, 2,0x33333333L); \
410 PERM_OP(l,r,tt, 8,0x00ff00ffL); \
411 PERM_OP(r,l,tt, 1,0x55555555L); \
412 }
413
414 #define FP(l,r) \
415 { \
416 register DES_LONG tt; \
417 PERM_OP(l,r,tt, 1,0x55555555L); \
418 PERM_OP(r,l,tt, 8,0x00ff00ffL); \
419 PERM_OP(l,r,tt, 2,0x33333333L); \
420 PERM_OP(r,l,tt,16,0x0000ffffL); \
421 PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \
422 }
423
424 extern const DES_LONG DES_SPtrans[8][64];
425
426 void fcrypt_body(DES_LONG *out,DES_key_schedule *ks,
427 DES_LONG Eswap0, DES_LONG Eswap1);
428
429 #ifdef OPENSSL_SMALL_FOOTPRINT
430 #undef DES_UNROLL
431 #endif
432 #endif