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des_locl.h
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1 /* crypto/des/des_locl.h */
2 /* Copyright (C) 1995-1997 Eric Young ([email protected])
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young ([email protected]).
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 ([email protected]).
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 ([email protected])"
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 ([email protected])"
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 <[email protected]>
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