aboutsummaryrefslogtreecommitdiff
path: root/libXdmcp/Wraphelp.c
blob: 22da82cb1710a9e022324aec55e4b95aa64dadee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <X11/Xmd.h>
#include "Wrap.h"

/* des routines for non-usa - eay 10/9/1991 eay@psych.psy.uq.oz.au
 * These routines were written for speed not size so they are bigger than
 * needed.  I have removed some of the loop unrolling, this will reduce
 * code size at the expense of some speed.
 * 25/9/1991 eay - much faster _XdmcpAuthSetup (4 times faster).
 * 19/9/1991 eay - cleaned up the IP and FP code.
 * 10/9/1991 eay - first release.
 * The des routines this file has been made from can be found in
 * ftp.psy.uq.oz.au /pub/DES
 * This particular version derived from OpenBSD Revsion 1.3.
 */

/*
 *
 * Export Requirements.
 * You may not export or re-export this software or any copy or
 * adaptation in violation of any applicable laws or regulations.
 *
 * Without limiting the generality of the foregoing, hardware, software,
 * technology or services provided under this license agreement may not
 * be exported, reexported, transferred or downloaded to or within (or to
 * a national resident of) countries under U.S. economic embargo
 * including the following countries:
 *
 * Cuba, Iran, Libya, North Korea, Sudan and Syria. This list is subject
 * to change.
 *
 * Hardware, software, technology or services may not be exported,
 * reexported, transferred or downloaded to persons or entities listed on
 * the U.S. Department of Commerce Denied Persons List, Entity List of
 * proliferation concern or on any U.S. Treasury Department Designated
 * Nationals exclusion list, or to parties directly or indirectly
 * involved in the development or production of nuclear, chemical,
 * biological weapons or in missile technology programs as specified in
 * the U.S. Export Administration Regulations (15 CFR 744).
 *
 * By accepting this license agreement you confirm that you are not
 * located in (or a national resident of) any country under U.S. economic
 * embargo, not identified on any U.S. Department of Commerce Denied
 * Persons List, Entity List or Treasury Department Designated Nationals
 * exclusion list, and not directly or indirectly involved in the
 * development or production of nuclear, chemical, biological weapons or
 * in missile technology programs as specified in the U.S. Export
 * Administration Regulations.
 * 
 * 
 * Local Country Import Requirements. The software you are about to
 * download contains cryptography technology. Some countries regulate the
 * import, use and/or export of certain products with cryptography. The
 * X.org Foundation makes no claims as to the applicability of local
 * country import, use and/or export regulations in relation to the
 * download of this product. If you are located outside the U.S. and
 * Canada you are advised to consult your local country regulations to
 * insure compliance.
 */

static const CARD32 skb[8][64] = {
	/* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
	{ 0x00000000,0x00000010,0x20000000,0x20000010,
	  0x00010000,0x00010010,0x20010000,0x20010010,
	  0x00000800,0x00000810,0x20000800,0x20000810,
	  0x00010800,0x00010810,0x20010800,0x20010810,
	  0x00000020,0x00000030,0x20000020,0x20000030,
	  0x00010020,0x00010030,0x20010020,0x20010030,
	  0x00000820,0x00000830,0x20000820,0x20000830,
	  0x00010820,0x00010830,0x20010820,0x20010830,
	  0x00080000,0x00080010,0x20080000,0x20080010,
	  0x00090000,0x00090010,0x20090000,0x20090010,
	  0x00080800,0x00080810,0x20080800,0x20080810,
	  0x00090800,0x00090810,0x20090800,0x20090810,
	  0x00080020,0x00080030,0x20080020,0x20080030,
	  0x00090020,0x00090030,0x20090020,0x20090030,
	  0x00080820,0x00080830,0x20080820,0x20080830,
	  0x00090820,0x00090830,0x20090820,0x20090830 },
	/* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
	{ 0x00000000,0x02000000,0x00002000,0x02002000,
	  0x00200000,0x02200000,0x00202000,0x02202000,
	  0x00000004,0x02000004,0x00002004,0x02002004,
	  0x00200004,0x02200004,0x00202004,0x02202004,
	  0x00000400,0x02000400,0x00002400,0x02002400,
	  0x00200400,0x02200400,0x00202400,0x02202400,
	  0x00000404,0x02000404,0x00002404,0x02002404,
	  0x00200404,0x02200404,0x00202404,0x02202404,
	  0x10000000,0x12000000,0x10002000,0x12002000,
	  0x10200000,0x12200000,0x10202000,0x12202000,
	  0x10000004,0x12000004,0x10002004,0x12002004,
	  0x10200004,0x12200004,0x10202004,0x12202004,
	  0x10000400,0x12000400,0x10002400,0x12002400,
	  0x10200400,0x12200400,0x10202400,0x12202400,
	  0x10000404,0x12000404,0x10002404,0x12002404,
	  0x10200404,0x12200404,0x10202404,0x12202404 },
	/* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
	{ 0x00000000,0x00000001,0x00040000,0x00040001,
	  0x01000000,0x01000001,0x01040000,0x01040001,
	  0x00000002,0x00000003,0x00040002,0x00040003,
	  0x01000002,0x01000003,0x01040002,0x01040003,
	  0x00000200,0x00000201,0x00040200,0x00040201,
	  0x01000200,0x01000201,0x01040200,0x01040201,
	  0x00000202,0x00000203,0x00040202,0x00040203,
	  0x01000202,0x01000203,0x01040202,0x01040203,
	  0x08000000,0x08000001,0x08040000,0x08040001,
	  0x09000000,0x09000001,0x09040000,0x09040001,
	  0x08000002,0x08000003,0x08040002,0x08040003,
	  0x09000002,0x09000003,0x09040002,0x09040003,
	  0x08000200,0x08000201,0x08040200,0x08040201,
	  0x09000200,0x09000201,0x09040200,0x09040201,
	  0x08000202,0x08000203,0x08040202,0x08040203,
	  0x09000202,0x09000203,0x09040202,0x09040203 },
	/* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
	{ 0x00000000,0x00100000,0x00000100,0x00100100,
	  0x00000008,0x00100008,0x00000108,0x00100108,
	  0x00001000,0x00101000,0x00001100,0x00101100,
	  0x00001008,0x00101008,0x00001108,0x00101108,
	  0x04000000,0x04100000,0x04000100,0x04100100,
	  0x04000008,0x04100008,0x04000108,0x04100108,
	  0x04001000,0x04101000,0x04001100,0x04101100,
	  0x04001008,0x04101008,0x04001108,0x04101108,
	  0x00020000,0x00120000,0x00020100,0x00120100,
	  0x00020008,0x00120008,0x00020108,0x00120108,
	  0x00021000,0x00121000,0x00021100,0x00121100,
	  0x00021008,0x00121008,0x00021108,0x00121108,
	  0x04020000,0x04120000,0x04020100,0x04120100,
	  0x04020008,0x04120008,0x04020108,0x04120108,
	  0x04021000,0x04121000,0x04021100,0x04121100,
	  0x04021008,0x04121008,0x04021108,0x04121108 },
	/* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
	{ 0x00000000,0x10000000,0x00010000,0x10010000,
	  0x00000004,0x10000004,0x00010004,0x10010004,
	  0x20000000,0x30000000,0x20010000,0x30010000,
	  0x20000004,0x30000004,0x20010004,0x30010004,
	  0x00100000,0x10100000,0x00110000,0x10110000,
	  0x00100004,0x10100004,0x00110004,0x10110004,
	  0x20100000,0x30100000,0x20110000,0x30110000,
	  0x20100004,0x30100004,0x20110004,0x30110004,
	  0x00001000,0x10001000,0x00011000,0x10011000,
	  0x00001004,0x10001004,0x00011004,0x10011004,
	  0x20001000,0x30001000,0x20011000,0x30011000,
	  0x20001004,0x30001004,0x20011004,0x30011004,
	  0x00101000,0x10101000,0x00111000,0x10111000,
	  0x00101004,0x10101004,0x00111004,0x10111004,
	  0x20101000,0x30101000,0x20111000,0x30111000,
	  0x20101004,0x30101004,0x20111004,0x30111004 },
	/* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
	{ 0x00000000,0x08000000,0x00000008,0x08000008,
	  0x00000400,0x08000400,0x00000408,0x08000408,
	  0x00020000,0x08020000,0x00020008,0x08020008,
	  0x00020400,0x08020400,0x00020408,0x08020408,
	  0x00000001,0x08000001,0x00000009,0x08000009,
	  0x00000401,0x08000401,0x00000409,0x08000409,
	  0x00020001,0x08020001,0x00020009,0x08020009,
	  0x00020401,0x08020401,0x00020409,0x08020409,
	  0x02000000,0x0A000000,0x02000008,0x0A000008,
	  0x02000400,0x0A000400,0x02000408,0x0A000408,
	  0x02020000,0x0A020000,0x02020008,0x0A020008,
	  0x02020400,0x0A020400,0x02020408,0x0A020408,
	  0x02000001,0x0A000001,0x02000009,0x0A000009,
	  0x02000401,0x0A000401,0x02000409,0x0A000409,
	  0x02020001,0x0A020001,0x02020009,0x0A020009,
	  0x02020401,0x0A020401,0x02020409,0x0A020409 },
	/* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
	{ 0x00000000,0x00000100,0x00080000,0x00080100,
	  0x01000000,0x01000100,0x01080000,0x01080100,
	  0x00000010,0x00000110,0x00080010,0x00080110,
	  0x01000010,0x01000110,0x01080010,0x01080110,
	  0x00200000,0x00200100,0x00280000,0x00280100,
	  0x01200000,0x01200100,0x01280000,0x01280100,
	  0x00200010,0x00200110,0x00280010,0x00280110,
	  0x01200010,0x01200110,0x01280010,0x01280110,
	  0x00000200,0x00000300,0x00080200,0x00080300,
	  0x01000200,0x01000300,0x01080200,0x01080300,
	  0x00000210,0x00000310,0x00080210,0x00080310,
	  0x01000210,0x01000310,0x01080210,0x01080310,
	  0x00200200,0x00200300,0x00280200,0x00280300,
	  0x01200200,0x01200300,0x01280200,0x01280300,
	  0x00200210,0x00200310,0x00280210,0x00280310,
	  0x01200210,0x01200310,0x01280210,0x01280310 },
	  /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
	{ 0x00000000,0x04000000,0x00040000,0x04040000,
	  0x00000002,0x04000002,0x00040002,0x04040002,
	  0x00002000,0x04002000,0x00042000,0x04042000,
	  0x00002002,0x04002002,0x00042002,0x04042002,
	  0x00000020,0x04000020,0x00040020,0x04040020,
	  0x00000022,0x04000022,0x00040022,0x04040022,
	  0x00002020,0x04002020,0x00042020,0x04042020,
	  0x00002022,0x04002022,0x00042022,0x04042022,
	  0x00000800,0x04000800,0x00040800,0x04040800,
	  0x00000802,0x04000802,0x00040802,0x04040802,
	  0x00002800,0x04002800,0x00042800,0x04042800,
	  0x00002802,0x04002802,0x00042802,0x04042802,
	  0x00000820,0x04000820,0x00040820,0x04040820,
	  0x00000822,0x04000822,0x00040822,0x04040822,
	  0x00002820,0x04002820,0x00042820,0x04042820,
	  0x00002822,0x04002822,0x00042822,0x04042822 }
};


static const CARD32 SPtrans[8][64] = {
	/* nibble 0 */
	{ 0x00410100, 0x00010000, 0x40400000, 0x40410100,
	  0x00400000, 0x40010100, 0x40010000, 0x40400000,
	  0x40010100, 0x00410100, 0x00410000, 0x40000100,
	  0x40400100, 0x00400000, 0x00000000, 0x40010000,
	  0x00010000, 0x40000000, 0x00400100, 0x00010100,
	  0x40410100, 0x00410000, 0x40000100, 0x00400100,
	  0x40000000, 0x00000100, 0x00010100, 0x40410000,
	  0x00000100, 0x40400100, 0x40410000, 0x00000000,
	  0x00000000, 0x40410100, 0x00400100, 0x40010000,
	  0x00410100, 0x00010000, 0x40000100, 0x00400100,
	  0x40410000, 0x00000100, 0x00010100, 0x40400000,
	  0x40010100, 0x40000000, 0x40400000, 0x00410000,
	  0x40410100, 0x00010100, 0x00410000, 0x40400100,
	  0x00400000, 0x40000100, 0x40010000, 0x00000000,
	  0x00010000, 0x00400000, 0x40400100, 0x00410100,
	  0x40000000, 0x40410000, 0x00000100, 0x40010100 },

	/* nibble 1 */
	{ 0x08021002, 0x00000000, 0x00021000, 0x08020000,
	  0x08000002, 0x00001002, 0x08001000, 0x00021000,
	  0x00001000, 0x08020002, 0x00000002, 0x08001000,
	  0x00020002, 0x08021000, 0x08020000, 0x00000002,
	  0x00020000, 0x08001002, 0x08020002, 0x00001000,
	  0x00021002, 0x08000000, 0x00000000, 0x00020002,
	  0x08001002, 0x00021002, 0x08021000, 0x08000002,
	  0x08000000, 0x00020000, 0x00001002, 0x08021002,
	  0x00020002, 0x08021000, 0x08001000, 0x00021002,
	  0x08021002, 0x00020002, 0x08000002, 0x00000000,
	  0x08000000, 0x00001002, 0x00020000, 0x08020002,
	  0x00001000, 0x08000000, 0x00021002, 0x08001002,
	  0x08021000, 0x00001000, 0x00000000, 0x08000002,
	  0x00000002, 0x08021002, 0x00021000, 0x08020000,
	  0x08020002, 0x00020000, 0x00001002, 0x08001000,
	  0x08001002, 0x00000002, 0x08020000, 0x00021000 },

	/* nibble 2 */
	{ 0x20800000, 0x00808020, 0x00000020, 0x20800020,
	  0x20008000, 0x00800000, 0x20800020, 0x00008020,
	  0x00800020, 0x00008000, 0x00808000, 0x20000000,
	  0x20808020, 0x20000020, 0x20000000, 0x20808000,
	  0x00000000, 0x20008000, 0x00808020, 0x00000020,
	  0x20000020, 0x20808020, 0x00008000, 0x20800000,
	  0x20808000, 0x00800020, 0x20008020, 0x00808000,
	  0x00008020, 0x00000000, 0x00800000, 0x20008020,
	  0x00808020, 0x00000020, 0x20000000, 0x00008000,
	  0x20000020, 0x20008000, 0x00808000, 0x20800020,
	  0x00000000, 0x00808020, 0x00008020, 0x20808000,
	  0x20008000, 0x00800000, 0x20808020, 0x20000000,
	  0x20008020, 0x20800000, 0x00800000, 0x20808020,
	  0x00008000, 0x00800020, 0x20800020, 0x00008020,
	  0x00800020, 0x00000000, 0x20808000, 0x20000020,
	  0x20800000, 0x20008020, 0x00000020, 0x00808000 },

	/* nibble 3 */
	{ 0x00080201, 0x02000200, 0x00000001, 0x02080201,
	  0x00000000, 0x02080000, 0x02000201, 0x00080001,
	  0x02080200, 0x02000001, 0x02000000, 0x00000201,
	  0x02000001, 0x00080201, 0x00080000, 0x02000000,
	  0x02080001, 0x00080200, 0x00000200, 0x00000001,
	  0x00080200, 0x02000201, 0x02080000, 0x00000200,
	  0x00000201, 0x00000000, 0x00080001, 0x02080200,
	  0x02000200, 0x02080001, 0x02080201, 0x00080000,
	  0x02080001, 0x00000201, 0x00080000, 0x02000001,
	  0x00080200, 0x02000200, 0x00000001, 0x02080000,
	  0x02000201, 0x00000000, 0x00000200, 0x00080001,
	  0x00000000, 0x02080001, 0x02080200, 0x00000200,
	  0x02000000, 0x02080201, 0x00080201, 0x00080000,
	  0x02080201, 0x00000001, 0x02000200, 0x00080201,
	  0x00080001, 0x00080200, 0x02080000, 0x02000201,
	  0x00000201, 0x02000000, 0x02000001, 0x02080200 },

	/* nibble 4 */
	{ 0x01000000, 0x00002000, 0x00000080, 0x01002084,
	  0x01002004, 0x01000080, 0x00002084, 0x01002000,
	  0x00002000, 0x00000004, 0x01000004, 0x00002080,
	  0x01000084, 0x01002004, 0x01002080, 0x00000000,
	  0x00002080, 0x01000000, 0x00002004, 0x00000084,
	  0x01000080, 0x00002084, 0x00000000, 0x01000004,
	  0x00000004, 0x01000084, 0x01002084, 0x00002004,
	  0x01002000, 0x00000080, 0x00000084, 0x01002080,
	  0x01002080, 0x01000084, 0x00002004, 0x01002000,
	  0x00002000, 0x00000004, 0x01000004, 0x01000080,
	  0x01000000, 0x00002080, 0x01002084, 0x00000000,
	  0x00002084, 0x01000000, 0x00000080, 0x00002004,
	  0x01000084, 0x00000080, 0x00000000, 0x01002084,
	  0x01002004, 0x01002080, 0x00000084, 0x00002000,
	  0x00002080, 0x01002004, 0x01000080, 0x00000084,
	  0x00000004, 0x00002084, 0x01002000, 0x01000004 },

	/* nibble 5 */
	{ 0x10000008, 0x00040008, 0x00000000, 0x10040400,
	  0x00040008, 0x00000400, 0x10000408, 0x00040000,
	  0x00000408, 0x10040408, 0x00040400, 0x10000000,
	  0x10000400, 0x10000008, 0x10040000, 0x00040408,
	  0x00040000, 0x10000408, 0x10040008, 0x00000000,
	  0x00000400, 0x00000008, 0x10040400, 0x10040008,
	  0x10040408, 0x10040000, 0x10000000, 0x00000408,
	  0x00000008, 0x00040400, 0x00040408, 0x10000400,
	  0x00000408, 0x10000000, 0x10000400, 0x00040408,
	  0x10040400, 0x00040008, 0x00000000, 0x10000400,
	  0x10000000, 0x00000400, 0x10040008, 0x00040000,
	  0x00040008, 0x10040408, 0x00040400, 0x00000008,
	  0x10040408, 0x00040400, 0x00040000, 0x10000408,
	  0x10000008, 0x10040000, 0x00040408, 0x00000000,
	  0x00000400, 0x10000008, 0x10000408, 0x10040400,
	  0x10040000, 0x00000408, 0x00000008, 0x10040008 },

	/* nibble 6 */
	{ 0x00000800, 0x00000040, 0x00200040, 0x80200000,
	  0x80200840, 0x80000800, 0x00000840, 0x00000000,
	  0x00200000, 0x80200040, 0x80000040, 0x00200800,
	  0x80000000, 0x00200840, 0x00200800, 0x80000040,
	  0x80200040, 0x00000800, 0x80000800, 0x80200840,
	  0x00000000, 0x00200040, 0x80200000, 0x00000840,
	  0x80200800, 0x80000840, 0x00200840, 0x80000000,
	  0x80000840, 0x80200800, 0x00000040, 0x00200000,
	  0x80000840, 0x00200800, 0x80200800, 0x80000040,
	  0x00000800, 0x00000040, 0x00200000, 0x80200800,
	  0x80200040, 0x80000840, 0x00000840, 0x00000000,
	  0x00000040, 0x80200000, 0x80000000, 0x00200040,
	  0x00000000, 0x80200040, 0x00200040, 0x00000840,
	  0x80000040, 0x00000800, 0x80200840, 0x00200000,
	  0x00200840, 0x80000000, 0x80000800, 0x80200840,
	  0x80200000, 0x00200840, 0x00200800, 0x80000800 },

	/* nibble 7 */
	{ 0x04100010, 0x04104000, 0x00004010, 0x00000000,
	  0x04004000, 0x00100010, 0x04100000, 0x04104010,
	  0x00000010, 0x04000000, 0x00104000, 0x00004010,
	  0x00104010, 0x04004010, 0x04000010, 0x04100000,
	  0x00004000, 0x00104010, 0x00100010, 0x04004000,
	  0x04104010, 0x04000010, 0x00000000, 0x00104000,
	  0x04000000, 0x00100000, 0x04004010, 0x04100010,
	  0x00100000, 0x00004000, 0x04104000, 0x00000010,
	  0x00100000, 0x00004000, 0x04000010, 0x04104010,
	  0x00004010, 0x04000000, 0x00000000, 0x00104000,
	  0x04100010, 0x04004010, 0x04004000, 0x00100010,
	  0x04104000, 0x00000010, 0x00100010, 0x04004000,
	  0x04104010, 0x00100000, 0x04100000, 0x04000010,
	  0x00104000, 0x00004010, 0x04004010, 0x04100000,
	  0x00000010, 0x04104000, 0x00104010, 0x00000000,
	  0x04000000, 0x04100010, 0x00004000, 0x00104010}
};

#define ITERATIONS 16
#define HALF_ITERATIONS 8

#define c2l(c,l)	(l =((CARD32)(*((c)++)))    , \
			 l|=((CARD32)(*((c)++)))<< 8, \
			 l|=((CARD32)(*((c)++)))<<16, \
			 l|=((CARD32)(*((c)++)))<<24)

#define l2c(l,c)	(*((c)++)=(CARD8)(((l)    )&0xff), \
			 *((c)++)=(CARD8)(((l)>> 8)&0xff), \
			 *((c)++)=(CARD8)(((l)>>16)&0xff), \
			 *((c)++)=(CARD8)(((l)>>24)&0xff))

#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
	(b)^=(t),\
	(a)^=((t)<<(n)))

#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
	(a)=(a)^(t)^(t>>(16-(n))))\

static const char shifts2[16] = {0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0};

void _XdmcpAuthSetup(auth_cblock key, auth_wrapper_schedule schedule)
{
	CARD32 c,d,t,s;
	CARD8 *in;
	CARD32 *k;
	int i;

	k=(CARD32 *)schedule;
	in=(CARD8 *)key;

	c2l(in,c);
	c2l(in,d);

	/* do PC1 in 60 simple operations */
	PERM_OP(d,c,t,4,0x0f0f0f0f);
	HPERM_OP(c,t,-2, 0xcccc0000);
	HPERM_OP(c,t,-1, 0xaaaa0000);
	HPERM_OP(c,t, 8, 0x00ff0000);
	HPERM_OP(c,t,-1, 0xaaaa0000);
	HPERM_OP(d,t,-8, 0xff000000);
	HPERM_OP(d,t, 8, 0x00ff0000);
	HPERM_OP(d,t, 2, 0x33330000);
	d=((d&0x00aa00aa)<<7)|((d&0x55005500)>>7)|(d&0xaa55aa55);
	d=(d>>8)|((c&0xf0000000)>>4);
	c&=0x0fffffff;

	for (i=0; i<ITERATIONS; i++) {
		if (shifts2[i]) {
			c=((c>>2)|(c<<26)); d=((d>>2)|(d<<26));
		} else {
			c=((c>>1)|(c<<27)); d=((d>>1)|(d<<27));
		}
		c&=0x0fffffff;
		d&=0x0fffffff;
		/* could be a few less shifts but I am to lazy at this
		 * point in time to investigate */
		s=	skb[0][ (c    )&0x3f		    ]|
			skb[1][((c>> 6)&0x03)|((c>> 7)&0x3c)]|
			skb[2][((c>>13)&0x0f)|((c>>14)&0x30)]|
			skb[3][((c>>20)&0x01)|((c>>21)&0x06) |
					      ((c>>22)&0x38)];
		t=	skb[4][ (d    )&0x3f		    ]|
			skb[5][((d>> 7)&0x03)|((d>> 8)&0x3c)]|
			skb[6][ (d>>15)&0x3f		    ]|
			skb[7][((d>>21)&0x0f)|((d>>22)&0x30)];

		/* table contained 0213 4657 */
		*(k++)=((t<<16)|(s&0x0000ffff));
		s=     ((s>>16)|(t&0xffff0000));

		s=(s<<4)|(s>>28);
		*(k++)=s;
	}
	return;
}

#define D_ENCRYPT(L,R,S)	\
	t=(R<<1)|(R>>31); \
	u=(t^s[S  ]); \
	t=(t^s[S+1]); \
	t=(t>>4)|(t<<28); \
	L^=	SPtrans[1][(t	 )&0x3f]| \
		SPtrans[3][(t>> 8)&0x3f]| \
		SPtrans[5][(t>>16)&0x3f]| \
		SPtrans[7][(t>>24)&0x3f]| \
		SPtrans[0][(u	 )&0x3f]| \
		SPtrans[2][(u>> 8)&0x3f]| \
		SPtrans[4][(u>>16)&0x3f]| \
		SPtrans[6][(u>>24)&0x3f];


void _XdmcpAuthDoIt(auth_cblock input, auth_cblock output,
    auth_wrapper_schedule ks, int encrypt)
{
	CARD32 l,r,t,u;
	CARD32 *s;
	CARD8 *in,*out;
	int i;

	in=(CARD8 *)input;
	out=(CARD8 *)output;
	c2l(in,l);
	c2l(in,r);

	/* do IP */
	PERM_OP(r,l,t, 4,0x0f0f0f0f);
	PERM_OP(l,r,t,16,0x0000ffff);
	PERM_OP(r,l,t, 2,0x33333333);
	PERM_OP(l,r,t, 8,0x00ff00ff);
	PERM_OP(r,l,t, 1,0x55555555);
	/* r and l are reversed - remember that :-) */
	t=l;
	l=r;
	r=t;

	s=(CARD32 *)ks;

	if (encrypt) {
		for (i=0; i<(ITERATIONS*2); i+=4) {
			D_ENCRYPT(l,r,	i); /*	1 */
			D_ENCRYPT(r,l,	i+2); /*  2 */
		}
	} else {
		for (i=(ITERATIONS*2)-2; i >= 0; i-=4) {
			D_ENCRYPT(l,r,	i); /*	1 */
			D_ENCRYPT(r,l,	i-2); /*  2 */
		}
	}

	/* swap l and r
	 * we will not do the swap so just remember they are
	 * reversed for the rest of the subroutine
	 * luckily by FP fixes this problem :-) */

	PERM_OP(r,l,t, 1,0x55555555);
	PERM_OP(l,r,t, 8,0x00ff00ff);
	PERM_OP(r,l,t, 2,0x33333333);
	PERM_OP(l,r,t,16,0x0000ffff);
	PERM_OP(r,l,t, 4,0x0f0f0f0f);

	l2c(l,out);
	l2c(r,out);
	return;
}