about summary refs log tree commit diff
path: root/src/crypt/crypt_blowfish.c
blob: bd37be84c1e996f9fcfc557ab5afdde1475dbe9a (plain) (blame)
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
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
/* Modified by Rich Felker in for inclusion in musl libc, based on
 * Solar Designer's second size-optimized version sent to the musl
 * mailing list. */

/*
 * The crypt_blowfish homepage is:
 *
 *	http://www.openwall.com/crypt/
 *
 * This code comes from John the Ripper password cracker, with reentrant
 * and crypt(3) interfaces added, but optimizations specific to password
 * cracking removed.
 *
 * Written by Solar Designer <solar at openwall.com> in 1998-2012.
 * No copyright is claimed, and the software is hereby placed in the public
 * domain.  In case this attempt to disclaim copyright and place the software
 * in the public domain is deemed null and void, then the software is
 * Copyright (c) 1998-2012 Solar Designer and it is hereby released to the
 * general public under the following terms:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted.
 *
 * There's ABSOLUTELY NO WARRANTY, express or implied.
 *
 * It is my intent that you should be able to use this on your system,
 * as part of a software package, or anywhere else to improve security,
 * ensure compatibility, or for any other purpose.  I would appreciate
 * it if you give credit where it is due and keep your modifications in
 * the public domain as well, but I don't require that in order to let
 * you place this code and any modifications you make under a license
 * of your choice.
 *
 * This implementation is mostly compatible with OpenBSD's bcrypt.c (prefix
 * "$2a$") by Niels Provos <provos at citi.umich.edu>, and uses some of his
 * ideas.  The password hashing algorithm was designed by David Mazieres
 * <dm at lcs.mit.edu>.  For more information on the level of compatibility,
 * please refer to the comments in BF_set_key() below and to the included
 * crypt(3) man page.
 *
 * There's a paper on the algorithm that explains its design decisions:
 *
 *	http://www.usenix.org/events/usenix99/provos.html
 *
 * Some of the tricks in BF_ROUND might be inspired by Eric Young's
 * Blowfish library (I can't be sure if I would think of something if I
 * hadn't seen his code).
 */

#include <string.h>
#include <stdint.h>

typedef uint32_t BF_word;
typedef int32_t BF_word_signed;

/* Number of Blowfish rounds, this is also hardcoded into a few places */
#define BF_N				16

typedef BF_word BF_key[BF_N + 2];

typedef union {
	struct {
		BF_key P;
		BF_word S[4][0x100];
	} s;
	BF_word PS[BF_N + 2 + 4 * 0x100];
} BF_ctx;

/*
 * Magic IV for 64 Blowfish encryptions that we do at the end.
 * The string is "OrpheanBeholderScryDoubt" on big-endian.
 */
static const BF_word BF_magic_w[6] = {
	0x4F727068, 0x65616E42, 0x65686F6C,
	0x64657253, 0x63727944, 0x6F756274
};

/*
 * P-box and S-box tables initialized with digits of Pi.
 */
static const BF_ctx BF_init_state = {{
	{
		0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
		0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
		0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
		0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
		0x9216d5d9, 0x8979fb1b
	}, {
		{
			0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
			0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
			0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
			0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
			0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
			0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
			0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
			0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
			0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
			0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
			0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
			0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
			0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
			0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
			0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
			0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
			0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
			0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
			0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
			0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
			0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
			0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
			0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
			0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
			0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
			0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
			0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
			0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
			0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
			0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
			0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
			0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
			0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
			0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
			0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
			0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
			0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
			0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
			0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
			0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
			0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
			0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
			0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
			0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
			0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
			0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
			0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
			0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
			0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
			0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
			0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
			0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
			0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
			0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
			0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
			0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
			0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
			0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
			0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
			0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
			0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
			0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
			0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
			0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a
		}, {
			0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
			0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
			0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
			0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
			0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
			0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
			0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
			0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
			0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
			0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
			0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
			0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
			0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
			0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
			0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
			0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
			0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
			0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
			0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
			0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
			0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
			0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
			0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
			0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
			0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
			0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
			0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
			0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
			0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
			0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
			0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
			0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
			0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
			0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
			0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
			0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
			0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
			0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
			0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
			0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
			0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
			0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
			0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
			0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
			0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
			0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
			0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
			0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
			0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
			0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
			0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
			0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
			0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
			0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
			0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
			0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
			0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
			0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
			0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
			0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
			0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
			0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
			0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
			0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7
		}, {
			0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
			0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
			0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
			0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
			0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
			0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
			0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
			0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
			0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
			0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
			0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
			0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
			0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
			0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
			0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
			0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
			0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
			0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
			0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
			0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
			0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
			0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
			0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
			0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
			0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
			0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
			0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
			0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
			0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
			0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
			0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
			0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
			0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
			0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
			0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
			0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
			0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
			0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
			0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
			0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
			0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
			0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
			0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
			0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
			0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
			0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
			0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
			0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
			0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
			0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
			0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
			0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
			0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
			0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
			0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
			0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
			0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
			0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
			0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
			0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
			0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
			0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
			0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
			0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0
		}, {
			0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
			0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
			0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
			0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
			0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
			0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
			0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
			0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
			0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
			0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
			0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
			0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
			0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
			0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
			0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
			0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
			0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
			0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
			0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
			0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
			0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
			0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
			0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
			0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
			0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
			0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
			0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
			0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
			0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
			0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
			0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
			0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
			0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
			0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
			0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
			0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
			0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
			0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
			0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
			0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
			0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
			0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
			0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
			0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
			0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
			0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
			0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
			0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
			0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
			0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
			0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
			0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
			0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
			0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
			0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
			0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
			0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
			0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
			0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
			0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
			0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
			0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
			0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
			0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
		}
	}
}};

static const unsigned char BF_itoa64[64 + 1] =
	"./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

static const unsigned char BF_atoi64[0x60] = {
	64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 0, 1,
	54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 64, 64, 64, 64, 64,
	64, 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, 64, 64, 64, 64, 64,
	64, 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, 64, 64, 64, 64, 64
};

#define BF_safe_atoi64(dst, src) \
{ \
	tmp = (unsigned char)(src); \
	if ((unsigned int)(tmp -= 0x20) >= 0x60) return -1; \
	tmp = BF_atoi64[tmp]; \
	if (tmp > 63) return -1; \
	(dst) = tmp; \
}

static int BF_decode(BF_word *dst, const char *src, int size)
{
	unsigned char *dptr = (unsigned char *)dst;
	unsigned char *end = dptr + size;
	const unsigned char *sptr = (const unsigned char *)src;
	unsigned int tmp, c1, c2, c3, c4;

	do {
		BF_safe_atoi64(c1, *sptr++);
		BF_safe_atoi64(c2, *sptr++);
		*dptr++ = (c1 << 2) | ((c2 & 0x30) >> 4);
		if (dptr >= end) break;

		BF_safe_atoi64(c3, *sptr++);
		*dptr++ = ((c2 & 0x0F) << 4) | ((c3 & 0x3C) >> 2);
		if (dptr >= end) break;

		BF_safe_atoi64(c4, *sptr++);
		*dptr++ = ((c3 & 0x03) << 6) | c4;
	} while (dptr < end);

	return 0;
}

static void BF_encode(char *dst, const BF_word *src, int size)
{
	const unsigned char *sptr = (const unsigned char *)src;
	const unsigned char *end = sptr + size;
	unsigned char *dptr = (unsigned char *)dst;
	unsigned int c1, c2;

	do {
		c1 = *sptr++;
		*dptr++ = BF_itoa64[c1 >> 2];
		c1 = (c1 & 0x03) << 4;
		if (sptr >= end) {
			*dptr++ = BF_itoa64[c1];
			break;
		}

		c2 = *sptr++;
		c1 |= c2 >> 4;
		*dptr++ = BF_itoa64[c1];
		c1 = (c2 & 0x0f) << 2;
		if (sptr >= end) {
			*dptr++ = BF_itoa64[c1];
			break;
		}

		c2 = *sptr++;
		c1 |= c2 >> 6;
		*dptr++ = BF_itoa64[c1];
		*dptr++ = BF_itoa64[c2 & 0x3f];
	} while (sptr < end);
}

static void BF_swap(BF_word *x, int count)
{
	if ((union { int i; char c; }){1}.c)
	do {
		BF_word tmp = *x;
		tmp = (tmp << 16) | (tmp >> 16);
		*x++ = ((tmp & 0x00FF00FF) << 8) | ((tmp >> 8) & 0x00FF00FF);
	} while (--count);
}

#define BF_ROUND(L, R, N) \
	tmp1 = L & 0xFF; \
	tmp2 = L >> 8; \
	tmp2 &= 0xFF; \
	tmp3 = L >> 16; \
	tmp3 &= 0xFF; \
	tmp4 = L >> 24; \
	tmp1 = ctx->s.S[3][tmp1]; \
	tmp2 = ctx->s.S[2][tmp2]; \
	tmp3 = ctx->s.S[1][tmp3]; \
	tmp3 += ctx->s.S[0][tmp4]; \
	tmp3 ^= tmp2; \
	R ^= ctx->s.P[N + 1]; \
	tmp3 += tmp1; \
	R ^= tmp3;

static BF_word BF_encrypt(BF_ctx *ctx,
    BF_word L, BF_word R,
    BF_word *start, BF_word *end)
{
	BF_word tmp1, tmp2, tmp3, tmp4;
	BF_word *ptr = start;

	do {
		L ^= ctx->s.P[0];
#if 0
		BF_ROUND(L, R, 0);
		BF_ROUND(R, L, 1);
		BF_ROUND(L, R, 2);
		BF_ROUND(R, L, 3);
		BF_ROUND(L, R, 4);
		BF_ROUND(R, L, 5);
		BF_ROUND(L, R, 6);
		BF_ROUND(R, L, 7);
		BF_ROUND(L, R, 8);
		BF_ROUND(R, L, 9);
		BF_ROUND(L, R, 10);
		BF_ROUND(R, L, 11);
		BF_ROUND(L, R, 12);
		BF_ROUND(R, L, 13);
		BF_ROUND(L, R, 14);
		BF_ROUND(R, L, 15);
#else
		for (int i=0; i<16; i+=2) {
			BF_ROUND(L, R, i);
			BF_ROUND(R, L, i+1);
		}
#endif
		tmp4 = R;
		R = L;
		L = tmp4 ^ ctx->s.P[BF_N + 1];
		*ptr++ = L;
		*ptr++ = R;
	} while (ptr < end);

	return L;
}

static void BF_set_key(const char *key, BF_key expanded, BF_key initial,
    unsigned char flags)
{
	const char *ptr = key;
	unsigned int bug, i, j;
	BF_word safety, sign, diff, tmp[2];

/*
 * There was a sign extension bug in older revisions of this function.  While
 * we would have liked to simply fix the bug and move on, we have to provide
 * a backwards compatibility feature (essentially the bug) for some systems and
 * a safety measure for some others.  The latter is needed because for certain
 * multiple inputs to the buggy algorithm there exist easily found inputs to
 * the correct algorithm that produce the same hash.  Thus, we optionally
 * deviate from the correct algorithm just enough to avoid such collisions.
 * While the bug itself affected the majority of passwords containing
 * characters with the 8th bit set (although only a percentage of those in a
 * collision-producing way), the anti-collision safety measure affects
 * only a subset of passwords containing the '\xff' character (not even all of
 * those passwords, just some of them).  This character is not found in valid
 * UTF-8 sequences and is rarely used in popular 8-bit character encodings.
 * Thus, the safety measure is unlikely to cause much annoyance, and is a
 * reasonable tradeoff to use when authenticating against existing hashes that
 * are not reliably known to have been computed with the correct algorithm.
 *
 * We use an approach that tries to minimize side-channel leaks of password
 * information - that is, we mostly use fixed-cost bitwise operations instead
 * of branches or table lookups.  (One conditional branch based on password
 * length remains.  It is not part of the bug aftermath, though, and is
 * difficult and possibly unreasonable to avoid given the use of C strings by
 * the caller, which results in similar timing leaks anyway.)
 *
 * For actual implementation, we set an array index in the variable "bug"
 * (0 means no bug, 1 means sign extension bug emulation) and a flag in the
 * variable "safety" (bit 16 is set when the safety measure is requested).
 * Valid combinations of settings are:
 *
 * Prefix "$2a$": bug = 0, safety = 0x10000
 * Prefix "$2x$": bug = 1, safety = 0
 * Prefix "$2y$": bug = 0, safety = 0
 */
	bug = flags & 1;
	safety = ((BF_word)flags & 2) << 15;

	sign = diff = 0;

	for (i = 0; i < BF_N + 2; i++) {
		tmp[0] = tmp[1] = 0;
		for (j = 0; j < 4; j++) {
			tmp[0] <<= 8;
			tmp[0] |= (unsigned char)*ptr; /* correct */
			tmp[1] <<= 8;
			tmp[1] |= (signed char)*ptr; /* bug */
/*
 * Sign extension in the first char has no effect - nothing to overwrite yet,
 * and those extra 24 bits will be fully shifted out of the 32-bit word.  For
 * chars 2, 3, 4 in each four-char block, we set bit 7 of "sign" if sign
 * extension in tmp[1] occurs.  Once this flag is set, it remains set.
 */
			if (j)
				sign |= tmp[1] & 0x80;
			if (!*ptr)
				ptr = key;
			else
				ptr++;
		}
		diff |= tmp[0] ^ tmp[1]; /* Non-zero on any differences */

		expanded[i] = tmp[bug];
		initial[i] = BF_init_state.s.P[i] ^ tmp[bug];
	}

/*
 * At this point, "diff" is zero iff the correct and buggy algorithms produced
 * exactly the same result.  If so and if "sign" is non-zero, which indicates
 * that there was a non-benign sign extension, this means that we have a
 * collision between the correctly computed hash for this password and a set of
 * passwords that could be supplied to the buggy algorithm.  Our safety measure
 * is meant to protect from such many-buggy to one-correct collisions, by
 * deviating from the correct algorithm in such cases.  Let's check for this.
 */
	diff |= diff >> 16; /* still zero iff exact match */
	diff &= 0xffff; /* ditto */
	diff += 0xffff; /* bit 16 set iff "diff" was non-zero (on non-match) */
	sign <<= 9; /* move the non-benign sign extension flag to bit 16 */
	sign &= ~diff & safety; /* action needed? */

/*
 * If we have determined that we need to deviate from the correct algorithm,
 * flip bit 16 in initial expanded key.  (The choice of 16 is arbitrary, but
 * let's stick to it now.  It came out of the approach we used above, and it's
 * not any worse than any other choice we could make.)
 *
 * It is crucial that we don't do the same to the expanded key used in the main
 * Eksblowfish loop.  By doing it to only one of these two, we deviate from a
 * state that could be directly specified by a password to the buggy algorithm
 * (and to the fully correct one as well, but that's a side-effect).
 */
	initial[0] ^= sign;
}

static char *BF_crypt(const char *key, const char *setting,
	char *output, BF_word min)
{
	static const unsigned char flags_by_subtype[26] =
		{2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 4, 0};
	struct {
		BF_ctx ctx;
		BF_key expanded_key;
		union {
			BF_word salt[4];
			BF_word output[6];
		} binary;
	} data;
	BF_word count;
	int i;

	if (setting[0] != '$' ||
	    setting[1] != '2' ||
	    setting[2] - 'a' > 25U ||
	    !flags_by_subtype[setting[2] - 'a'] ||
	    setting[3] != '$' ||
	    setting[4] - '0' > 1U ||
	    setting[5] - '0' > 9U ||
	    setting[6] != '$') {
		return NULL;
	}

	count = (BF_word)1 << ((setting[4] - '0') * 10 + (setting[5] - '0'));
	if (count < min || count > 2048 || BF_decode(data.binary.salt, &setting[7], 16)) {
		return NULL;
	}
	BF_swap(data.binary.salt, 4);

	BF_set_key(key, data.expanded_key, data.ctx.s.P,
	    flags_by_subtype[setting[2] - 'a']);

	memcpy(data.ctx.s.S, BF_init_state.s.S, sizeof(data.ctx.s.S));

	{
		BF_word L = 0, R = 0;
		BF_word *ptr = &data.ctx.PS[0];
		do {
			L = BF_encrypt(&data.ctx,
			    L ^ data.binary.salt[0], R ^ data.binary.salt[1],
			    ptr, ptr);
			R = *(ptr + 1);
			ptr += 2;

			if (ptr >= &data.ctx.PS[BF_N + 2 + 4 * 0x100])
				break;

			L = BF_encrypt(&data.ctx,
			    L ^ data.binary.salt[2], R ^ data.binary.salt[3],
			    ptr, ptr);
			R = *(ptr + 1);
			ptr += 2;
		} while (1);
	}

	do {
		int done;

		for (i = 0; i < BF_N + 2; i += 2) {
			data.ctx.s.P[i] ^= data.expanded_key[i];
			data.ctx.s.P[i + 1] ^= data.expanded_key[i + 1];
		}

		done = 0;
		do {
			BF_encrypt(&data.ctx, 0, 0,
			    &data.ctx.PS[0],
			    &data.ctx.PS[BF_N + 2 + 4 * 0x100]);

			if (done)
				break;
			done = 1;

			{
				BF_word tmp1, tmp2, tmp3, tmp4;

				tmp1 = data.binary.salt[0];
				tmp2 = data.binary.salt[1];
				tmp3 = data.binary.salt[2];
				tmp4 = data.binary.salt[3];
				for (i = 0; i < BF_N; i += 4) {
					data.ctx.s.P[i] ^= tmp1;
					data.ctx.s.P[i + 1] ^= tmp2;
					data.ctx.s.P[i + 2] ^= tmp3;
					data.ctx.s.P[i + 3] ^= tmp4;
				}
				data.ctx.s.P[16] ^= tmp1;
				data.ctx.s.P[17] ^= tmp2;
			}
		} while (1);
	} while (--count);

	for (i = 0; i < 6; i += 2) {
		BF_word L, LR[2];

		L = BF_magic_w[i];
		LR[1] = BF_magic_w[i + 1];

		count = 64;
		do {
			L = BF_encrypt(&data.ctx, L, LR[1],
			    &LR[0], &LR[0]);
		} while (--count);

		data.binary.output[i] = L;
		data.binary.output[i + 1] = LR[1];
	}

	memcpy(output, setting, 7 + 22 - 1);
	output[7 + 22 - 1] = BF_itoa64[
		BF_atoi64[setting[7 + 22 - 1] - 0x20] & 0x30];

/* This has to be bug-compatible with the original implementation, so
 * only encode 23 of the 24 bytes. :-) */
	BF_swap(data.binary.output, 6);
	BF_encode(&output[7 + 22], data.binary.output, 23);
	output[7 + 22 + 31] = '\0';

	return output;
}

/*
 * Please preserve the runtime self-test.  It serves two purposes at once:
 *
 * 1. We really can't afford the risk of producing incompatible hashes e.g.
 * when there's something like gcc bug 26587 again, whereas an application or
 * library integrating this code might not also integrate our external tests or
 * it might not run them after every build.  Even if it does, the miscompile
 * might only occur on the production build, but not on a testing build (such
 * as because of different optimization settings).  It is painful to recover
 * from incorrectly-computed hashes - merely fixing whatever broke is not
 * enough.  Thus, a proactive measure like this self-test is needed.
 *
 * 2. We don't want to leave sensitive data from our actual password hash
 * computation on the stack or in registers.  Previous revisions of the code
 * would do explicit cleanups, but simply running the self-test after hash
 * computation is more reliable.
 *
 * The performance cost of this quick self-test is around 0.6% at the "$2a$08"
 * setting.
 */
char *__crypt_blowfish(const char *key, const char *setting, char *output)
{
	const char *test_key = "8b \xd0\xc1\xd2\xcf\xcc\xd8";
	const char *test_setting = "$2a$00$abcdefghijklmnopqrstuu";
	static const char test_hash[2][34] =
		{"VUrPmXD6q/nVSSp7pNDhCR9071IfIRe\0\x55", /* $2x$ */
		"i1D709vfamulimlGcq0qq3UvuUasvEa\0\x55"}; /* $2a$, $2y$ */
	char *retval;
	const char *p;
	int ok;
	struct {
		char s[7 + 22 + 1];
		char o[7 + 22 + 31 + 1 + 1 + 1];
	} buf;

/* Hash the supplied password */
	retval = BF_crypt(key, setting, output, 16);

/*
 * Do a quick self-test.  It is important that we make both calls to BF_crypt()
 * from the same scope such that they likely use the same stack locations,
 * which makes the second call overwrite the first call's sensitive data on the
 * stack and makes it more likely that any alignment related issues would be
 * detected by the self-test.
 */
	memcpy(buf.s, test_setting, sizeof(buf.s));
	if (retval)
		buf.s[2] = setting[2];
	memset(buf.o, 0x55, sizeof(buf.o));
	buf.o[sizeof(buf.o) - 1] = 0;
	p = BF_crypt(test_key, buf.s, buf.o, 1);

	ok = (p == buf.o &&
	    !memcmp(p, buf.s, 7 + 22) &&
	    !memcmp(p + (7 + 22),
	    test_hash[buf.s[2] & 1],
	    31 + 1 + 1 + 1));

	{
		const char *k = "\xff\xa3" "34" "\xff\xff\xff\xa3" "345";
		BF_key ae, ai, ye, yi;
		BF_set_key(k, ae, ai, 2); /* $2a$ */
		BF_set_key(k, ye, yi, 4); /* $2y$ */
		ai[0] ^= 0x10000; /* undo the safety (for comparison) */
		ok = ok && ai[0] == 0xdb9c59bc && ye[17] == 0x33343500 &&
		    !memcmp(ae, ye, sizeof(ae)) &&
		    !memcmp(ai, yi, sizeof(ai));
	}

	if (ok && retval)
		return retval;

	return "*";
}