summaryrefslogtreecommitdiffstats
path: root/sys/opencrypto/cryptodev.c
blob: f5e80a0f5b3cbd00b83c972c9bd9ac9146e2869e (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
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
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
/*	$OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $	*/

/*-
 * Copyright (c) 2001 Theo de Raadt
 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
 * Copyright (c) 2014 The FreeBSD Foundation
 * All rights reserved.
 *
 * Portions of this software were developed by John-Mark Gurney
 * under sponsorship of the FreeBSD Foundation and
 * Rubicon Communications, LLC (Netgate).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Effort sponsored in part by the Defense Advanced Research Projects
 * Agency (DARPA) and Air Force Research Laboratory, Air Force
 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_compat.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/errno.h>
#include <sys/uio.h>
#include <sys/random.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/fcntl.h>
#include <sys/bus.h>
#include <sys/user.h>
#include <sys/sdt.h>

#include <opencrypto/cryptodev.h>
#include <opencrypto/xform.h>

SDT_PROVIDER_DECLARE(opencrypto);

SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);

#ifdef COMPAT_FREEBSD32
#include <sys/mount.h>
#include <compat/freebsd32/freebsd32.h>

struct session_op32 {
	u_int32_t	cipher;
	u_int32_t	mac;
	u_int32_t	keylen;
	u_int32_t	key;
	int		mackeylen;
	u_int32_t	mackey;
	u_int32_t	ses;
};

struct session2_op32 {
	u_int32_t	cipher;
	u_int32_t	mac;
	u_int32_t	keylen;
	u_int32_t	key;
	int		mackeylen;
	u_int32_t	mackey;
	u_int32_t	ses;
	int		crid;
	int		pad[4];
};

struct crypt_op32 {
	u_int32_t	ses;
	u_int16_t	op;
	u_int16_t	flags;
	u_int		len;
	u_int32_t	src, dst;
	u_int32_t	mac;
	u_int32_t	iv;
};

struct crparam32 {
	u_int32_t	crp_p;
	u_int		crp_nbits;
};

struct crypt_kop32 {
	u_int		crk_op;
	u_int		crk_status;
	u_short		crk_iparams;
	u_short		crk_oparams;
	u_int		crk_crid;
	struct crparam32	crk_param[CRK_MAXPARAM];
};

struct cryptotstat32 {
	struct timespec32	acc;
	struct timespec32	min;
	struct timespec32	max;
	u_int32_t	count;
};

struct cryptostats32 {
	u_int32_t	cs_ops;
	u_int32_t	cs_errs;
	u_int32_t	cs_kops;
	u_int32_t	cs_kerrs;
	u_int32_t	cs_intrs;
	u_int32_t	cs_rets;
	u_int32_t	cs_blocks;
	u_int32_t	cs_kblocks;
	struct cryptotstat32 cs_invoke;
	struct cryptotstat32 cs_done;
	struct cryptotstat32 cs_cb;
	struct cryptotstat32 cs_finis;
};

#define	CIOCGSESSION32	_IOWR('c', 101, struct session_op32)
#define	CIOCCRYPT32	_IOWR('c', 103, struct crypt_op32)
#define	CIOCKEY32	_IOWR('c', 104, struct crypt_kop32)
#define	CIOCGSESSION232	_IOWR('c', 106, struct session2_op32)
#define	CIOCKEY232	_IOWR('c', 107, struct crypt_kop32)

static void
session_op_from_32(const struct session_op32 *from, struct session_op *to)
{

	CP(*from, *to, cipher);
	CP(*from, *to, mac);
	CP(*from, *to, keylen);
	PTRIN_CP(*from, *to, key);
	CP(*from, *to, mackeylen);
	PTRIN_CP(*from, *to, mackey);
	CP(*from, *to, ses);
}

static void
session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
{

	session_op_from_32((const struct session_op32 *)from,
	    (struct session_op *)to);
	CP(*from, *to, crid);
}

static void
session_op_to_32(const struct session_op *from, struct session_op32 *to)
{

	CP(*from, *to, cipher);
	CP(*from, *to, mac);
	CP(*from, *to, keylen);
	PTROUT_CP(*from, *to, key);
	CP(*from, *to, mackeylen);
	PTROUT_CP(*from, *to, mackey);
	CP(*from, *to, ses);
}

static void
session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
{

	session_op_to_32((const struct session_op *)from,
	    (struct session_op32 *)to);
	CP(*from, *to, crid);
}

static void
crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
{

	CP(*from, *to, ses);
	CP(*from, *to, op);
	CP(*from, *to, flags);
	CP(*from, *to, len);
	PTRIN_CP(*from, *to, src);
	PTRIN_CP(*from, *to, dst);
	PTRIN_CP(*from, *to, mac);
	PTRIN_CP(*from, *to, iv);
}

static void
crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
{

	CP(*from, *to, ses);
	CP(*from, *to, op);
	CP(*from, *to, flags);
	CP(*from, *to, len);
	PTROUT_CP(*from, *to, src);
	PTROUT_CP(*from, *to, dst);
	PTROUT_CP(*from, *to, mac);
	PTROUT_CP(*from, *to, iv);
}

static void
crparam_from_32(const struct crparam32 *from, struct crparam *to)
{

	PTRIN_CP(*from, *to, crp_p);
	CP(*from, *to, crp_nbits);
}

static void
crparam_to_32(const struct crparam *from, struct crparam32 *to)
{

	PTROUT_CP(*from, *to, crp_p);
	CP(*from, *to, crp_nbits);
}

static void
crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
{
	int i;

	CP(*from, *to, crk_op);
	CP(*from, *to, crk_status);
	CP(*from, *to, crk_iparams);
	CP(*from, *to, crk_oparams);
	CP(*from, *to, crk_crid);
	for (i = 0; i < CRK_MAXPARAM; i++)
		crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
}

static void
crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
{
	int i;

	CP(*from, *to, crk_op);
	CP(*from, *to, crk_status);
	CP(*from, *to, crk_iparams);
	CP(*from, *to, crk_oparams);
	CP(*from, *to, crk_crid);
	for (i = 0; i < CRK_MAXPARAM; i++)
		crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
}
#endif

struct csession {
	TAILQ_ENTRY(csession) next;
	u_int64_t	sid;
	u_int32_t	ses;
	struct mtx	lock;		/* for op submission */

	u_int32_t	cipher;
	struct enc_xform *txform;
	u_int32_t	mac;
	struct auth_hash *thash;

	caddr_t		key;
	int		keylen;
	u_char		tmp_iv[EALG_MAX_BLOCK_LEN];

	caddr_t		mackey;
	int		mackeylen;

	struct iovec	iovec;
	struct uio	uio;
	int		error;
};

struct fcrypt {
	TAILQ_HEAD(csessionlist, csession) csessions;
	int		sesn;
};

static	int cryptof_rw(struct file *fp, struct uio *uio,
		    struct ucred *cred, int flags, struct thread *);
static	int cryptof_truncate(struct file *, off_t, struct ucred *,
		    struct thread *);
static	int cryptof_ioctl(struct file *, u_long, void *,
		    struct ucred *, struct thread *);
static	int cryptof_poll(struct file *, int, struct ucred *, struct thread *);
static	int cryptof_kqfilter(struct file *, struct knote *);
static	int cryptof_stat(struct file *, struct stat *,
		    struct ucred *, struct thread *);
static	int cryptof_close(struct file *, struct thread *);

static struct fileops cryptofops = {
    .fo_read = cryptof_rw,
    .fo_write = cryptof_rw,
    .fo_truncate = cryptof_truncate,
    .fo_ioctl = cryptof_ioctl,
    .fo_poll = cryptof_poll,
    .fo_kqfilter = cryptof_kqfilter,
    .fo_stat = cryptof_stat,
    .fo_close = cryptof_close,
    .fo_chmod = invfo_chmod,
    .fo_chown = invfo_chown,
    .fo_sendfile = invfo_sendfile,
};

static struct csession *csefind(struct fcrypt *, u_int);
static int csedelete(struct fcrypt *, struct csession *);
static struct csession *cseadd(struct fcrypt *, struct csession *);
static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
    u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
    struct auth_hash *);
static int csefree(struct csession *);

static	int cryptodev_op(struct csession *, struct crypt_op *,
			struct ucred *, struct thread *td);
static	int cryptodev_aead(struct csession *, struct crypt_aead *,
			struct ucred *, struct thread *);
static	int cryptodev_key(struct crypt_kop *);
static	int cryptodev_find(struct crypt_find_op *);

static int
cryptof_rw(
	struct file *fp,
	struct uio *uio,
	struct ucred *active_cred,
	int flags,
	struct thread *td)
{

	return (EIO);
}

static int
cryptof_truncate(
	struct file *fp,
	off_t length,
	struct ucred *active_cred,
	struct thread *td)
{

	return (EINVAL);
}

/*
 * Check a crypto identifier to see if it requested
 * a software device/driver.  This can be done either
 * by device name/class or through search constraints.
 */
static int
checkforsoftware(int *cridp)
{
	int crid;

	crid = *cridp;

	if (!crypto_devallowsoft) {
		if (crid & CRYPTOCAP_F_SOFTWARE) {
			if (crid & CRYPTOCAP_F_HARDWARE) {
				*cridp = CRYPTOCAP_F_HARDWARE;
				return 0;
			}
			return EINVAL;
		}
		if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
		    (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
			return EINVAL;
	}
	return 0;
}

/* ARGSUSED */
static int
cryptof_ioctl(
	struct file *fp,
	u_long cmd,
	void *data,
	struct ucred *active_cred,
	struct thread *td)
{
#define	SES2(p)	((struct session2_op *)p)
	struct cryptoini cria, crie;
	struct fcrypt *fcr = fp->f_data;
	struct csession *cse;
	struct session_op *sop;
	struct crypt_op *cop;
	struct crypt_aead *caead;
	struct enc_xform *txform = NULL;
	struct auth_hash *thash = NULL;
	struct crypt_kop *kop;
	u_int64_t sid;
	u_int32_t ses;
	int error = 0, crid;
#ifdef COMPAT_FREEBSD32
	struct session2_op sopc;
	struct crypt_op copc;
	struct crypt_kop kopc;
#endif

	switch (cmd) {
	case CIOCGSESSION:
	case CIOCGSESSION2:
#ifdef COMPAT_FREEBSD32
	case CIOCGSESSION32:
	case CIOCGSESSION232:
		if (cmd == CIOCGSESSION32) {
			session_op_from_32(data, (struct session_op *)&sopc);
			sop = (struct session_op *)&sopc;
		} else if (cmd == CIOCGSESSION232) {
			session2_op_from_32(data, &sopc);
			sop = (struct session_op *)&sopc;
		} else
#endif
			sop = (struct session_op *)data;
		switch (sop->cipher) {
		case 0:
			break;
		case CRYPTO_DES_CBC:
			txform = &enc_xform_des;
			break;
		case CRYPTO_3DES_CBC:
			txform = &enc_xform_3des;
			break;
		case CRYPTO_BLF_CBC:
			txform = &enc_xform_blf;
			break;
		case CRYPTO_CAST_CBC:
			txform = &enc_xform_cast5;
			break;
		case CRYPTO_SKIPJACK_CBC:
			txform = &enc_xform_skipjack;
			break;
		case CRYPTO_AES_CBC:
			txform = &enc_xform_rijndael128;
			break;
		case CRYPTO_AES_XTS:
			txform = &enc_xform_aes_xts;
			break;
		case CRYPTO_NULL_CBC:
			txform = &enc_xform_null;
			break;
		case CRYPTO_ARC4:
			txform = &enc_xform_arc4;
			break;
 		case CRYPTO_CAMELLIA_CBC:
 			txform = &enc_xform_camellia;
 			break;
		case CRYPTO_AES_ICM:
			txform = &enc_xform_aes_icm;
 			break;
		case CRYPTO_AES_NIST_GCM_16:
			txform = &enc_xform_aes_nist_gcm;
 			break;

		default:
			CRYPTDEB("invalid cipher");
			return (EINVAL);
		}

		switch (sop->mac) {
		case 0:
			break;
		case CRYPTO_MD5_HMAC:
			thash = &auth_hash_hmac_md5;
			break;
		case CRYPTO_SHA1_HMAC:
			thash = &auth_hash_hmac_sha1;
			break;
		case CRYPTO_SHA2_256_HMAC:
			thash = &auth_hash_hmac_sha2_256;
			break;
		case CRYPTO_SHA2_384_HMAC:
			thash = &auth_hash_hmac_sha2_384;
			break;
		case CRYPTO_SHA2_512_HMAC:
			thash = &auth_hash_hmac_sha2_512;
			break;
		case CRYPTO_RIPEMD160_HMAC:
			thash = &auth_hash_hmac_ripemd_160;
			break;
		case CRYPTO_AES_128_NIST_GMAC:
			thash = &auth_hash_nist_gmac_aes_128;
			break;
		case CRYPTO_AES_192_NIST_GMAC:
			thash = &auth_hash_nist_gmac_aes_192;
			break;
		case CRYPTO_AES_256_NIST_GMAC:
			thash = &auth_hash_nist_gmac_aes_256;
			break;

#ifdef notdef
		case CRYPTO_MD5:
			thash = &auth_hash_md5;
			break;
		case CRYPTO_SHA1:
			thash = &auth_hash_sha1;
			break;
#endif
		case CRYPTO_NULL_HMAC:
			thash = &auth_hash_null;
			break;
		default:
			CRYPTDEB("invalid mac");
			return (EINVAL);
		}

		bzero(&crie, sizeof(crie));
		bzero(&cria, sizeof(cria));

		if (txform) {
			crie.cri_alg = txform->type;
			crie.cri_klen = sop->keylen * 8;
			if (sop->keylen > txform->maxkey ||
			    sop->keylen < txform->minkey) {
				CRYPTDEB("invalid cipher parameters");
				error = EINVAL;
				goto bail;
			}

			crie.cri_key = malloc(crie.cri_klen / 8,
			    M_XDATA, M_WAITOK);
			if ((error = copyin(sop->key, crie.cri_key,
			    crie.cri_klen / 8))) {
				CRYPTDEB("invalid key");
				goto bail;
			}
			if (thash)
				crie.cri_next = &cria;
		}

		if (thash) {
			cria.cri_alg = thash->type;
			cria.cri_klen = sop->mackeylen * 8;
			if (sop->mackeylen != thash->keysize) {
				CRYPTDEB("invalid mac key length");
				error = EINVAL;
				goto bail;
			}

			if (cria.cri_klen) {
				cria.cri_key = malloc(cria.cri_klen / 8,
				    M_XDATA, M_WAITOK);
				if ((error = copyin(sop->mackey, cria.cri_key,
				    cria.cri_klen / 8))) {
					CRYPTDEB("invalid mac key");
					goto bail;
				}
			}
		}

		/* NB: CIOCGSESSION2 has the crid */
		if (cmd == CIOCGSESSION2
#ifdef COMPAT_FREEBSD32
		    || cmd == CIOCGSESSION232
#endif
			) {
			crid = SES2(sop)->crid;
			error = checkforsoftware(&crid);
			if (error) {
				CRYPTDEB("checkforsoftware");
				goto bail;
			}
		} else
			crid = CRYPTOCAP_F_HARDWARE;
		error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
		if (error) {
			CRYPTDEB("crypto_newsession");
			goto bail;
		}

		cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
		    cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
		    thash);

		if (cse == NULL) {
			crypto_freesession(sid);
			error = EINVAL;
			CRYPTDEB("csecreate");
			goto bail;
		}
		sop->ses = cse->ses;
		if (cmd == CIOCGSESSION2
#ifdef COMPAT_FREEBSD32
		    || cmd == CIOCGSESSION232
#endif
		    ) {
			/* return hardware/driver id */
			SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
		}
bail:
		if (error) {
			if (crie.cri_key)
				free(crie.cri_key, M_XDATA);
			if (cria.cri_key)
				free(cria.cri_key, M_XDATA);
		}
#ifdef COMPAT_FREEBSD32
		else {
			if (cmd == CIOCGSESSION32)
				session_op_to_32(sop, data);
			else if (cmd == CIOCGSESSION232)
				session2_op_to_32((struct session2_op *)sop,
				    data);
		}
#endif
		break;
	case CIOCFSESSION:
		ses = *(u_int32_t *)data;
		cse = csefind(fcr, ses);
		if (cse == NULL)
			return (EINVAL);
		csedelete(fcr, cse);
		error = csefree(cse);
		break;
	case CIOCCRYPT:
#ifdef COMPAT_FREEBSD32
	case CIOCCRYPT32:
		if (cmd == CIOCCRYPT32) {
			cop = &copc;
			crypt_op_from_32(data, cop);
		} else
#endif
			cop = (struct crypt_op *)data;
		cse = csefind(fcr, cop->ses);
		if (cse == NULL) {
			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
			return (EINVAL);
		}
		error = cryptodev_op(cse, cop, active_cred, td);
#ifdef COMPAT_FREEBSD32
		if (error == 0 && cmd == CIOCCRYPT32)
			crypt_op_to_32(cop, data);
#endif
		break;
	case CIOCKEY:
	case CIOCKEY2:
#ifdef COMPAT_FREEBSD32
	case CIOCKEY32:
	case CIOCKEY232:
#endif
		if (!crypto_userasymcrypto)
			return (EPERM);		/* XXX compat? */
#ifdef COMPAT_FREEBSD32
		if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
			kop = &kopc;
			crypt_kop_from_32(data, kop);
		} else
#endif
			kop = (struct crypt_kop *)data;
		if (cmd == CIOCKEY
#ifdef COMPAT_FREEBSD32
		    || cmd == CIOCKEY32
#endif
		    ) {
			/* NB: crypto core enforces s/w driver use */
			kop->crk_crid =
			    CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
		}
		mtx_lock(&Giant);
		error = cryptodev_key(kop);
		mtx_unlock(&Giant);
#ifdef COMPAT_FREEBSD32
		if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
			crypt_kop_to_32(kop, data);
#endif
		break;
	case CIOCASYMFEAT:
		if (!crypto_userasymcrypto) {
			/*
			 * NB: if user asym crypto operations are
			 * not permitted return "no algorithms"
			 * so well-behaved applications will just
			 * fallback to doing them in software.
			 */
			*(int *)data = 0;
		} else
			error = crypto_getfeat((int *)data);
		break;
	case CIOCFINDDEV:
		error = cryptodev_find((struct crypt_find_op *)data);
		break;
	case CIOCCRYPTAEAD:
		caead = (struct crypt_aead *)data;
		cse = csefind(fcr, caead->ses);
		if (cse == NULL)
			return (EINVAL);
		error = cryptodev_aead(cse, caead, active_cred, td);
		break;
	default:
		error = EINVAL;
		break;
	}
	return (error);
#undef SES2
}

static int cryptodev_cb(void *);


static int
cryptodev_op(
	struct csession *cse,
	struct crypt_op *cop,
	struct ucred *active_cred,
	struct thread *td)
{
	struct cryptop *crp = NULL;
	struct cryptodesc *crde = NULL, *crda = NULL;
	int error;

	if (cop->len > 256*1024-4) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		return (E2BIG);
	}

	if (cse->txform) {
		if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
			return (EINVAL);
		}
	}

	cse->uio.uio_iov = &cse->iovec;
	cse->uio.uio_iovcnt = 1;
	cse->uio.uio_offset = 0;
	cse->uio.uio_resid = cop->len;
	cse->uio.uio_segflg = UIO_SYSSPACE;
	cse->uio.uio_rw = UIO_WRITE;
	cse->uio.uio_td = td;
	cse->uio.uio_iov[0].iov_len = cop->len;
	if (cse->thash) {
		cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
		cse->uio.uio_resid += cse->thash->hashsize;
	}
	cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len,
	    M_XDATA, M_WAITOK);

	crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
	if (crp == NULL) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		error = ENOMEM;
		goto bail;
	}

	if (cse->thash) {
		crda = crp->crp_desc;
		if (cse->txform)
			crde = crda->crd_next;
	} else {
		if (cse->txform)
			crde = crp->crp_desc;
		else {
			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
			error = EINVAL;
			goto bail;
		}
	}

	if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base,
	    cop->len))) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		goto bail;
	}

	if (crda) {
		crda->crd_skip = 0;
		crda->crd_len = cop->len;
		crda->crd_inject = cop->len;

		crda->crd_alg = cse->mac;
		crda->crd_key = cse->mackey;
		crda->crd_klen = cse->mackeylen * 8;
	}

	if (crde) {
		if (cop->op == COP_ENCRYPT)
			crde->crd_flags |= CRD_F_ENCRYPT;
		else
			crde->crd_flags &= ~CRD_F_ENCRYPT;
		crde->crd_len = cop->len;
		crde->crd_inject = 0;

		crde->crd_alg = cse->cipher;
		crde->crd_key = cse->key;
		crde->crd_klen = cse->keylen * 8;
	}

	crp->crp_ilen = cop->len;
	crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
		       | (cop->flags & COP_F_BATCH);
	crp->crp_buf = (caddr_t)&cse->uio;
	crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
	crp->crp_sid = cse->sid;
	crp->crp_opaque = (void *)cse;

	if (cop->iv) {
		if (crde == NULL) {
			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
			error = EINVAL;
			goto bail;
		}
		if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
			error = EINVAL;
			goto bail;
		}
		if ((error = copyin(cop->iv, cse->tmp_iv,
		    cse->txform->blocksize))) {
			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
			goto bail;
		}
		bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
		crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
		crde->crd_skip = 0;
	} else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
		crde->crd_skip = 0;
	} else if (crde) {
		crde->crd_flags |= CRD_F_IV_PRESENT;
		crde->crd_skip = cse->txform->blocksize;
		crde->crd_len -= cse->txform->blocksize;
	}

	if (cop->mac && crda == NULL) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		error = EINVAL;
		goto bail;
	}

again:
	/*
	 * Let the dispatch run unlocked, then, interlock against the
	 * callback before checking if the operation completed and going
	 * to sleep.  This insures drivers don't inherit our lock which
	 * results in a lock order reversal between crypto_dispatch forced
	 * entry and the crypto_done callback into us.
	 */
	error = crypto_dispatch(crp);
	mtx_lock(&cse->lock);
	if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
		error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
	mtx_unlock(&cse->lock);

	if (error != 0) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		goto bail;
	}

	if (crp->crp_etype == EAGAIN) {
		crp->crp_etype = 0;
		crp->crp_flags &= ~CRYPTO_F_DONE;
		goto again;
	}

	if (crp->crp_etype != 0) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		error = crp->crp_etype;
		goto bail;
	}

	if (cse->error) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		error = cse->error;
		goto bail;
	}

	if (cop->dst &&
	    (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst,
	    cop->len))) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		goto bail;
	}

	if (cop->mac &&
	    (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
	    cop->mac, cse->thash->hashsize))) {
		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
		goto bail;
	}

bail:
	if (crp)
		crypto_freereq(crp);
	if (cse->uio.uio_iov[0].iov_base)
		free(cse->uio.uio_iov[0].iov_base, M_XDATA);

	return (error);
}

static int
cryptodev_aead(
	struct csession *cse,
	struct crypt_aead *caead,
	struct ucred *active_cred,
	struct thread *td)
{
	struct uio *uio;
	struct cryptop *crp = NULL;
	struct cryptodesc *crde = NULL, *crda = NULL;
	int error;

	if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4)
		return (E2BIG);

	if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
	    (caead->len % cse->txform->blocksize) != 0)
		return (EINVAL);

	uio = &cse->uio;
	uio->uio_iov = &cse->iovec;
	uio->uio_iovcnt = 1;
	uio->uio_offset = 0;
	uio->uio_resid = caead->len + caead->aadlen + cse->thash->hashsize;
	uio->uio_segflg = UIO_SYSSPACE;
	uio->uio_rw = UIO_WRITE;
	uio->uio_td = td;
	uio->uio_iov[0].iov_len = uio->uio_resid;

	uio->uio_iov[0].iov_base = malloc(uio->uio_iov[0].iov_len,
	    M_XDATA, M_WAITOK);

	crp = crypto_getreq(2);
	if (crp == NULL) {
		error = ENOMEM;
		goto bail;
	}

	crda = crp->crp_desc;
	crde = crda->crd_next;

	if ((error = copyin(caead->src, cse->uio.uio_iov[0].iov_base,
	    caead->len)))
		goto bail;

	if ((error = copyin(caead->aad, (char *)cse->uio.uio_iov[0].iov_base +
	    caead->len, caead->aadlen)))
		goto bail;

	crda->crd_skip = caead->len;
	crda->crd_len = caead->aadlen;
	crda->crd_inject = caead->len + caead->aadlen;

	crda->crd_alg = cse->mac;
	crda->crd_key = cse->mackey;
	crda->crd_klen = cse->mackeylen * 8;

	if (caead->op == COP_ENCRYPT)
		crde->crd_flags |= CRD_F_ENCRYPT;
	else
		crde->crd_flags &= ~CRD_F_ENCRYPT;
	/* crde->crd_skip set below */
	crde->crd_len = caead->len;
	crde->crd_inject = 0;

	crde->crd_alg = cse->cipher;
	crde->crd_key = cse->key;
	crde->crd_klen = cse->keylen * 8;

	crp->crp_ilen = caead->len + caead->aadlen;
	crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
		       | (caead->flags & COP_F_BATCH);
	crp->crp_buf = (caddr_t)&cse->uio.uio_iov;
	crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
	crp->crp_sid = cse->sid;
	crp->crp_opaque = (void *)cse;

	if (caead->iv) {
		if (caead->ivlen > sizeof cse->tmp_iv) {
			error = EINVAL;
			goto bail;
		}

		if ((error = copyin(caead->iv, cse->tmp_iv, caead->ivlen)))
			goto bail;
		bcopy(cse->tmp_iv, crde->crd_iv, caead->ivlen);
		crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
		crde->crd_skip = 0;
	} else {
		crde->crd_flags |= CRD_F_IV_PRESENT;
		crde->crd_skip = cse->txform->blocksize;
		crde->crd_len -= cse->txform->blocksize;
	}

	if ((error = copyin(caead->tag, (caddr_t)cse->uio.uio_iov[0].iov_base +
	    caead->len + caead->aadlen, cse->thash->hashsize)))
		goto bail;
again:
	/*
	 * Let the dispatch run unlocked, then, interlock against the
	 * callback before checking if the operation completed and going
	 * to sleep.  This insures drivers don't inherit our lock which
	 * results in a lock order reversal between crypto_dispatch forced
	 * entry and the crypto_done callback into us.
	 */
	error = crypto_dispatch(crp);
	mtx_lock(&cse->lock);
	if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
		error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
	mtx_unlock(&cse->lock);

	if (error != 0)
		goto bail;

	if (crp->crp_etype == EAGAIN) {
		crp->crp_etype = 0;
		crp->crp_flags &= ~CRYPTO_F_DONE;
		goto again;
	}

	if (crp->crp_etype != 0) {
		error = crp->crp_etype;
		goto bail;
	}

	if (cse->error) {
		error = cse->error;
		goto bail;
	}

	if (caead->dst && (error = copyout(cse->uio.uio_iov[0].iov_base,
	    caead->dst, caead->len)))
		goto bail;

	if ((error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base +
	    caead->len + caead->aadlen, caead->tag, cse->thash->hashsize)))
		goto bail;

bail:
	crypto_freereq(crp);
	free(cse->uio.uio_iov[0].iov_base, M_XDATA);

	return (error);
}

static int
cryptodev_cb(void *op)
{
	struct cryptop *crp = (struct cryptop *) op;
	struct csession *cse = (struct csession *)crp->crp_opaque;

	mtx_lock(&cse->lock);
	cse->error = crp->crp_etype;
	wakeup_one(crp);
	mtx_unlock(&cse->lock);
	return (0);
}

static int
cryptodevkey_cb(void *op)
{
	struct cryptkop *krp = (struct cryptkop *) op;

	wakeup_one(krp);
	return (0);
}

static int
cryptodev_key(struct crypt_kop *kop)
{
	struct cryptkop *krp = NULL;
	int error = EINVAL;
	int in, out, size, i;

	if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
		return (EFBIG);
	}

	in = kop->crk_iparams;
	out = kop->crk_oparams;
	switch (kop->crk_op) {
	case CRK_MOD_EXP:
		if (in == 3 && out == 1)
			break;
		return (EINVAL);
	case CRK_MOD_EXP_CRT:
		if (in == 6 && out == 1)
			break;
		return (EINVAL);
	case CRK_DSA_SIGN:
		if (in == 5 && out == 2)
			break;
		return (EINVAL);
	case CRK_DSA_VERIFY:
		if (in == 7 && out == 0)
			break;
		return (EINVAL);
	case CRK_DH_COMPUTE_KEY:
		if (in == 3 && out == 1)
			break;
		return (EINVAL);
	default:
		return (EINVAL);
	}

	krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
	if (!krp)
		return (ENOMEM);
	krp->krp_op = kop->crk_op;
	krp->krp_status = kop->crk_status;
	krp->krp_iparams = kop->crk_iparams;
	krp->krp_oparams = kop->crk_oparams;
	krp->krp_crid = kop->crk_crid;
	krp->krp_status = 0;
	krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;

	for (i = 0; i < CRK_MAXPARAM; i++) {
		if (kop->crk_param[i].crp_nbits > 65536)
			/* Limit is the same as in OpenBSD */
			goto fail;
		krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
	}
	for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
		size = (krp->krp_param[i].crp_nbits + 7) / 8;
		if (size == 0)
			continue;
		krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
		if (i >= krp->krp_iparams)
			continue;
		error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
		if (error)
			goto fail;
	}

	error = crypto_kdispatch(krp);
	if (error)
		goto fail;
	error = tsleep(krp, PSOCK, "crydev", 0);
	if (error) {
		/* XXX can this happen?  if so, how do we recover? */
		goto fail;
	}
	
	kop->crk_crid = krp->krp_crid;		/* device that did the work */
	if (krp->krp_status != 0) {
		error = krp->krp_status;
		goto fail;
	}

	for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
		size = (krp->krp_param[i].crp_nbits + 7) / 8;
		if (size == 0)
			continue;
		error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
		if (error)
			goto fail;
	}

fail:
	if (krp) {
		kop->crk_status = krp->krp_status;
		for (i = 0; i < CRK_MAXPARAM; i++) {
			if (krp->krp_param[i].crp_p)
				free(krp->krp_param[i].crp_p, M_XDATA);
		}
		free(krp, M_XDATA);
	}
	return (error);
}

static int
cryptodev_find(struct crypt_find_op *find)
{
	device_t dev;
	size_t fnlen = sizeof find->name;

	if (find->crid != -1) {
		dev = crypto_find_device_byhid(find->crid);
		if (dev == NULL)
			return (ENOENT);
		strncpy(find->name, device_get_nameunit(dev), fnlen);
		find->name[fnlen - 1] = '\x0';
	} else {
		find->name[fnlen - 1] = '\x0';
		find->crid = crypto_find_driver(find->name);
		if (find->crid == -1)
			return (ENOENT);
	}
	return (0);
}

/* ARGSUSED */
static int
cryptof_poll(
	struct file *fp,
	int events,
	struct ucred *active_cred,
	struct thread *td)
{

	return (0);
}

/* ARGSUSED */
static int
cryptof_kqfilter(struct file *fp, struct knote *kn)
{

	return (0);
}

/* ARGSUSED */
static int
cryptof_stat(
	struct file *fp,
	struct stat *sb,
	struct ucred *active_cred,
	struct thread *td)
{

	return (EOPNOTSUPP);
}

/* ARGSUSED */
static int
cryptof_close(struct file *fp, struct thread *td)
{
	struct fcrypt *fcr = fp->f_data;
	struct csession *cse;

	while ((cse = TAILQ_FIRST(&fcr->csessions))) {
		TAILQ_REMOVE(&fcr->csessions, cse, next);
		(void)csefree(cse);
	}
	free(fcr, M_XDATA);
	fp->f_data = NULL;
	return 0;
}

static struct csession *
csefind(struct fcrypt *fcr, u_int ses)
{
	struct csession *cse;

	TAILQ_FOREACH(cse, &fcr->csessions, next)
		if (cse->ses == ses)
			return (cse);
	return (NULL);
}

static int
csedelete(struct fcrypt *fcr, struct csession *cse_del)
{
	struct csession *cse;

	TAILQ_FOREACH(cse, &fcr->csessions, next) {
		if (cse == cse_del) {
			TAILQ_REMOVE(&fcr->csessions, cse, next);
			return (1);
		}
	}
	return (0);
}
	
static struct csession *
cseadd(struct fcrypt *fcr, struct csession *cse)
{
	TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
	cse->ses = fcr->sesn++;
	return (cse);
}

struct csession *
csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
    caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
    struct enc_xform *txform, struct auth_hash *thash)
{
	struct csession *cse;

	cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
	if (cse == NULL)
		return NULL;
	mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
	cse->key = key;
	cse->keylen = keylen/8;
	cse->mackey = mackey;
	cse->mackeylen = mackeylen/8;
	cse->sid = sid;
	cse->cipher = cipher;
	cse->mac = mac;
	cse->txform = txform;
	cse->thash = thash;
	cseadd(fcr, cse);
	return (cse);
}

static int
csefree(struct csession *cse)
{
	int error;

	error = crypto_freesession(cse->sid);
	mtx_destroy(&cse->lock);
	if (cse->key)
		free(cse->key, M_XDATA);
	if (cse->mackey)
		free(cse->mackey, M_XDATA);
	free(cse, M_XDATA);
	return (error);
}

static int
cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
	return (0);
}

static int
cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
{
	return (EIO);
}

static int
cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
{
	return (EIO);
}

static int
cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
	struct file *f;
	struct fcrypt *fcr;
	int fd, error;

	switch (cmd) {
	case CRIOGET:
		fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
		TAILQ_INIT(&fcr->csessions);
		fcr->sesn = 0;

		error = falloc(td, &f, &fd, 0);

		if (error) {
			free(fcr, M_XDATA);
			return (error);
		}
		/* falloc automatically provides an extra reference to 'f'. */
		finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
		*(u_int32_t *)data = fd;
		fdrop(f, td);
		break;
	case CRIOFINDDEV:
		error = cryptodev_find((struct crypt_find_op *)data);
		break;
	case CRIOASYMFEAT:
		error = crypto_getfeat((int *)data);
		break;
	default:
		error = EINVAL;
		break;
	}
	return (error);
}

static struct cdevsw crypto_cdevsw = {
	.d_version =	D_VERSION,
	.d_flags =	D_NEEDGIANT,
	.d_open =	cryptoopen,
	.d_read =	cryptoread,
	.d_write =	cryptowrite,
	.d_ioctl =	cryptoioctl,
	.d_name =	"crypto",
};
static struct cdev *crypto_dev;

/*
 * Initialization code, both for static and dynamic loading.
 */
static int
cryptodev_modevent(module_t mod, int type, void *unused)
{
	switch (type) {
	case MOD_LOAD:
		if (bootverbose)
			printf("crypto: <crypto device>\n");
		crypto_dev = make_dev(&crypto_cdevsw, 0, 
				      UID_ROOT, GID_WHEEL, 0666,
				      "crypto");
		return 0;
	case MOD_UNLOAD:
		/*XXX disallow if active sessions */
		destroy_dev(crypto_dev);
		return 0;
	}
	return EINVAL;
}

static moduledata_t cryptodev_mod = {
	"cryptodev",
	cryptodev_modevent,
	0
};
MODULE_VERSION(cryptodev, 1);
DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
OpenPOWER on IntegriCloud