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Remove redundant sentence.
[dragonfly.git] / sys / opencrypto / cryptodev.c
blob4c4ee9ea80dd64f31c90c6c06ec7ab0314e40e1a
1 /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.4 2003/06/03 00:09:02 sam Exp $ */
2 /* $DragonFly: src/sys/opencrypto/cryptodev.c,v 1.23 2008/01/06 16:55:53 swildner Exp $ */
3 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
4
5 /*
6 * Copyright (c) 2001 Theo de Raadt
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Effort sponsored in part by the Defense Advanced Research Projects
32 * Agency (DARPA) and Air Force Research Laboratory, Air Force
33 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
34 *
35 */
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/malloc.h>
40 #include <sys/mbuf.h>
41 #include <sys/sysctl.h>
42 #include <sys/file.h>
43 #include <sys/lock.h>
44 #include <sys/filedesc.h>
45 #include <sys/errno.h>
46 #include <sys/uio.h>
47 #include <sys/random.h>
48 #include <sys/conf.h>
49 #include <sys/device.h>
50 #include <sys/kernel.h>
51 #include <sys/fcntl.h>
52 #include <sys/proc.h>
53 #include <sys/file2.h>
54 #include <sys/thread2.h>
55
56 #include <opencrypto/cryptodev.h>
57 #include <opencrypto/xform.h>
58
59 struct csession {
60 TAILQ_ENTRY(csession) next;
61 u_int64_t sid;
62 u_int32_t ses;
63
64 u_int32_t cipher;
65 struct enc_xform *txform;
66 u_int32_t mac;
67 struct auth_hash *thash;
68
69 caddr_t key;
70 int keylen;
71 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
72
73 caddr_t mackey;
74 int mackeylen;
75 u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
76
77 struct iovec iovec[UIO_MAXIOV];
78 struct uio uio;
79 int error;
80 };
81
82 struct fcrypt {
83 TAILQ_HEAD(csessionlist, csession) csessions;
84 int sesn;
85 };
86
87 static int cryptof_rw(struct file *fp, struct uio *uio,
88 struct ucred *cred, int flags);
89 static int cryptof_ioctl(struct file *, u_long, caddr_t, struct ucred *);
90 static int cryptof_poll(struct file *, int, struct ucred *);
91 static int cryptof_kqfilter(struct file *, struct knote *);
92 static int cryptof_stat(struct file *, struct stat *, struct ucred *);
93 static int cryptof_close(struct file *);
94
95 static struct fileops cryptofops = {
96 .fo_read = cryptof_rw,
97 .fo_write = cryptof_rw,
98 .fo_ioctl = cryptof_ioctl,
99 .fo_poll = cryptof_poll,
100 .fo_kqfilter = cryptof_kqfilter,
101 .fo_stat = cryptof_stat,
102 .fo_close = cryptof_close,
103 .fo_shutdown = nofo_shutdown
104 };
105
106 static struct csession *csefind(struct fcrypt *, u_int);
107 static int csedelete(struct fcrypt *, struct csession *);
108 static struct csession *cseadd(struct fcrypt *, struct csession *);
109 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
110 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
111 struct auth_hash *);
112 static int csefree(struct csession *);
113
114 static int cryptodev_op(struct csession *, struct crypt_op *);
115 static int cryptodev_key(struct crypt_kop *);
116
117 /*
118 * MPSAFE
119 */
120 static int
121 cryptof_rw(
122 struct file *fp,
123 struct uio *uio,
124 struct ucred *active_cred,
125 int flags)
126 {
127 return (EIO);
128 }
129
130 /*
131 * MPALMOSTSAFE - acquires mplock
132 */
133 static int
134 cryptof_ioctl(
135 struct file *fp,
136 u_long cmd,
137 caddr_t data,
138 struct ucred *cred)
139 {
140 struct cryptoini cria, crie;
141 struct fcrypt *fcr;
142 struct csession *cse;
143 struct session_op *sop;
144 struct crypt_op *cop;
145 struct enc_xform *txform = NULL;
146 struct auth_hash *thash = NULL;
147 u_int64_t sid;
148 u_int32_t ses;
149 int error = 0;
150
151 get_mplock();
152 fcr = (struct fcrypt *)fp->f_data;
153
154 switch (cmd) {
155 case CIOCGSESSION:
156 sop = (struct session_op *)data;
157 switch (sop->cipher) {
158 case 0:
159 break;
160 case CRYPTO_DES_CBC:
161 txform = &enc_xform_des;
162 break;
163 case CRYPTO_3DES_CBC:
164 txform = &enc_xform_3des;
165 break;
166 case CRYPTO_BLF_CBC:
167 txform = &enc_xform_blf;
168 break;
169 case CRYPTO_CAST_CBC:
170 txform = &enc_xform_cast5;
171 break;
172 case CRYPTO_SKIPJACK_CBC:
173 txform = &enc_xform_skipjack;
174 break;
175 case CRYPTO_AES_CBC:
176 txform = &enc_xform_rijndael128;
177 break;
178 case CRYPTO_NULL_CBC:
179 txform = &enc_xform_null;
180 break;
181 case CRYPTO_ARC4:
182 txform = &enc_xform_arc4;
183 break;
184 default:
185 error = EINVAL;
186 break;
187 }
188 if (error)
189 break;
190
191 switch (sop->mac) {
192 case 0:
193 break;
194 case CRYPTO_MD5_HMAC:
195 thash = &auth_hash_hmac_md5_96;
196 break;
197 case CRYPTO_SHA1_HMAC:
198 thash = &auth_hash_hmac_sha1_96;
199 break;
200 case CRYPTO_SHA2_HMAC:
201 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
202 thash = &auth_hash_hmac_sha2_256;
203 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
204 thash = &auth_hash_hmac_sha2_384;
205 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
206 thash = &auth_hash_hmac_sha2_512;
207 else {
208 error = EINVAL;
209 break;
210 }
211 break;
212 case CRYPTO_RIPEMD160_HMAC:
213 thash = &auth_hash_hmac_ripemd_160_96;
214 break;
215 #ifdef notdef
216 case CRYPTO_MD5:
217 thash = &auth_hash_md5;
218 break;
219 case CRYPTO_SHA1:
220 thash = &auth_hash_sha1;
221 break;
222 #endif
223 case CRYPTO_NULL_HMAC:
224 thash = &auth_hash_null;
225 break;
226 default:
227 error = EINVAL;
228 break;
229 }
230 if (error)
231 break;
232
233 bzero(&crie, sizeof(crie));
234 bzero(&cria, sizeof(cria));
235
236 if (txform) {
237 crie.cri_alg = txform->type;
238 crie.cri_klen = sop->keylen * 8;
239 if (sop->keylen > txform->maxkey ||
240 sop->keylen < txform->minkey) {
241 error = EINVAL;
242 goto bail;
243 }
244
245 MALLOC(crie.cri_key, u_int8_t *,
246 crie.cri_klen / 8, M_XDATA, M_WAITOK);
247 if ((error = copyin(sop->key, crie.cri_key,
248 crie.cri_klen / 8)))
249 goto bail;
250 if (thash)
251 crie.cri_next = &cria;
252 }
253
254 if (thash) {
255 cria.cri_alg = thash->type;
256 cria.cri_klen = sop->mackeylen * 8;
257 if (sop->mackeylen != thash->keysize) {
258 error = EINVAL;
259 goto bail;
260 }
261
262 if (cria.cri_klen) {
263 MALLOC(cria.cri_key, u_int8_t *,
264 cria.cri_klen / 8, M_XDATA, M_WAITOK);
265 if ((error = copyin(sop->mackey, cria.cri_key,
266 cria.cri_klen / 8)))
267 goto bail;
268 }
269 }
270
271 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1);
272 if (error)
273 goto bail;
274
275 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
276 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
277 thash);
278
279 if (cse == NULL) {
280 crypto_freesession(sid);
281 error = EINVAL;
282 goto bail;
283 }
284 sop->ses = cse->ses;
285
286 bail:
287 if (error) {
288 if (crie.cri_key)
289 FREE(crie.cri_key, M_XDATA);
290 if (cria.cri_key)
291 FREE(cria.cri_key, M_XDATA);
292 }
293 break;
294 case CIOCFSESSION:
295 ses = *(u_int32_t *)data;
296 cse = csefind(fcr, ses);
297 if (cse == NULL) {
298 error = EINVAL;
299 break;
300 }
301 csedelete(fcr, cse);
302 error = csefree(cse);
303 break;
304 case CIOCCRYPT:
305 cop = (struct crypt_op *)data;
306 cse = csefind(fcr, cop->ses);
307 if (cse == NULL) {
308 error = EINVAL;
309 break;
310 }
311 error = cryptodev_op(cse, cop);
312 break;
313 case CIOCKEY:
314 error = cryptodev_key((struct crypt_kop *)data);
315 break;
316 case CIOCASYMFEAT:
317 error = crypto_getfeat((int *)data);
318 break;
319 default:
320 error = EINVAL;
321 break;
322 }
323 rel_mplock();
324 return (error);
325 }
326
327 static int cryptodev_cb(void *);
328
329
330 static int
331 cryptodev_op(struct csession *cse, struct crypt_op *cop)
332 {
333 struct cryptop *crp = NULL;
334 struct cryptodesc *crde = NULL, *crda = NULL;
335 int i, error;
336
337 if (cop->len > 256*1024-4)
338 return (E2BIG);
339
340 if (cse->txform && (cop->len % cse->txform->blocksize) != 0)
341 return (EINVAL);
342
343 bzero(&cse->uio, sizeof(cse->uio));
344 cse->uio.uio_iovcnt = 1;
345 cse->uio.uio_resid = 0;
346 cse->uio.uio_segflg = UIO_SYSSPACE;
347 cse->uio.uio_rw = UIO_WRITE;
348 cse->uio.uio_td = curthread;
349 cse->uio.uio_iov = cse->iovec;
350 bzero(&cse->iovec, sizeof(cse->iovec));
351 cse->uio.uio_iov[0].iov_len = cop->len;
352 cse->uio.uio_iov[0].iov_base = kmalloc(cop->len, M_XDATA, M_WAITOK);
353 for (i = 0; i < cse->uio.uio_iovcnt; i++)
354 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len;
355
356 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
357 if (crp == NULL) {
358 error = ENOMEM;
359 goto bail;
360 }
361
362 if (cse->thash) {
363 crda = crp->crp_desc;
364 if (cse->txform)
365 crde = crda->crd_next;
366 } else {
367 if (cse->txform)
368 crde = crp->crp_desc;
369 else {
370 error = EINVAL;
371 goto bail;
372 }
373 }
374
375 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
376 goto bail;
377
378 if (crda) {
379 crda->crd_skip = 0;
380 crda->crd_len = cop->len;
381 crda->crd_inject = 0; /* ??? */
382
383 crda->crd_alg = cse->mac;
384 crda->crd_key = cse->mackey;
385 crda->crd_klen = cse->mackeylen * 8;
386 }
387
388 if (crde) {
389 if (cop->op == COP_ENCRYPT)
390 crde->crd_flags |= CRD_F_ENCRYPT;
391 else
392 crde->crd_flags &= ~CRD_F_ENCRYPT;
393 crde->crd_len = cop->len;
394 crde->crd_inject = 0;
395
396 crde->crd_alg = cse->cipher;
397 crde->crd_key = cse->key;
398 crde->crd_klen = cse->keylen * 8;
399 }
400
401 crp->crp_ilen = cop->len;
402 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
403 | (cop->flags & COP_F_BATCH);
404 crp->crp_buf = (caddr_t)&cse->uio;
405 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
406 crp->crp_sid = cse->sid;
407 crp->crp_opaque = (void *)cse;
408
409 if (cop->iv) {
410 if (crde == NULL) {
411 error = EINVAL;
412 goto bail;
413 }
414 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
415 error = EINVAL;
416 goto bail;
417 }
418 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
419 goto bail;
420 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
421 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
422 crde->crd_skip = 0;
423 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
424 crde->crd_skip = 0;
425 } else if (crde) {
426 crde->crd_flags |= CRD_F_IV_PRESENT;
427 crde->crd_skip = cse->txform->blocksize;
428 crde->crd_len -= cse->txform->blocksize;
429 }
430
431 if (cop->mac) {
432 if (crda == NULL) {
433 error = EINVAL;
434 goto bail;
435 }
436 crp->crp_mac=cse->tmp_mac;
437 }
438
439 crit_enter();
440 error = crypto_dispatch(crp);
441 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
442 error = tsleep(crp, 0, "crydev", 0);
443 crit_exit();
444 if (error)
445 goto bail;
446
447 if (crp->crp_etype != 0) {
448 error = crp->crp_etype;
449 goto bail;
450 }
451
452 if (cse->error) {
453 error = cse->error;
454 goto bail;
455 }
456
457 if (cop->dst &&
458 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
459 goto bail;
460
461 if (cop->mac &&
462 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
463 goto bail;
464
465 bail:
466 if (crp)
467 crypto_freereq(crp);
468 if (cse->uio.uio_iov[0].iov_base)
469 kfree(cse->uio.uio_iov[0].iov_base, M_XDATA);
470
471 return (error);
472 }
473
474 static int
475 cryptodev_cb(void *op)
476 {
477 struct cryptop *crp = (struct cryptop *) op;
478 struct csession *cse = (struct csession *)crp->crp_opaque;
479
480 cse->error = crp->crp_etype;
481 if (crp->crp_etype == EAGAIN)
482 return crypto_dispatch(crp);
483 wakeup_one(crp);
484 return (0);
485 }
486
487 static int
488 cryptodevkey_cb(void *op)
489 {
490 struct cryptkop *krp = (struct cryptkop *) op;
491
492 wakeup_one(krp);
493 return (0);
494 }
495
496 static int
497 cryptodev_key(struct crypt_kop *kop)
498 {
499 struct cryptkop *krp = NULL;
500 int error = EINVAL;
501 int in, out, size, i;
502
503 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
504 return (EFBIG);
505 }
506
507 in = kop->crk_iparams;
508 out = kop->crk_oparams;
509 switch (kop->crk_op) {
510 case CRK_MOD_EXP:
511 if (in == 3 && out == 1)
512 break;
513 return (EINVAL);
514 case CRK_MOD_EXP_CRT:
515 if (in == 6 && out == 1)
516 break;
517 return (EINVAL);
518 case CRK_DSA_SIGN:
519 if (in == 5 && out == 2)
520 break;
521 return (EINVAL);
522 case CRK_DSA_VERIFY:
523 if (in == 7 && out == 0)
524 break;
525 return (EINVAL);
526 case CRK_DH_COMPUTE_KEY:
527 if (in == 3 && out == 1)
528 break;
529 return (EINVAL);
530 default:
531 return (EINVAL);
532 }
533
534 krp = (struct cryptkop *)kmalloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO);
535 krp->krp_op = kop->crk_op;
536 krp->krp_status = kop->crk_status;
537 krp->krp_iparams = kop->crk_iparams;
538 krp->krp_oparams = kop->crk_oparams;
539 krp->krp_status = 0;
540 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
541
542 for (i = 0; i < CRK_MAXPARAM; i++)
543 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
544 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
545 size = (krp->krp_param[i].crp_nbits + 7) / 8;
546 if (size == 0)
547 continue;
548 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK);
549 if (i >= krp->krp_iparams)
550 continue;
551 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
552 if (error)
553 goto fail;
554 }
555
556 error = crypto_kdispatch(krp);
557 if (error == 0)
558 error = tsleep(krp, 0, "crydev", 0);
559 if (error)
560 goto fail;
561
562 if (krp->krp_status != 0) {
563 error = krp->krp_status;
564 goto fail;
565 }
566
567 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
568 size = (krp->krp_param[i].crp_nbits + 7) / 8;
569 if (size == 0)
570 continue;
571 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
572 if (error)
573 goto fail;
574 }
575
576 fail:
577 if (krp) {
578 kop->crk_status = krp->krp_status;
579 for (i = 0; i < CRK_MAXPARAM; i++) {
580 if (krp->krp_param[i].crp_p)
581 FREE(krp->krp_param[i].crp_p, M_XDATA);
582 }
583 kfree(krp, M_XDATA);
584 }
585 return (error);
586 }
587
588 /*
589 * MPSAFE
590 */
591 static int
592 cryptof_poll(struct file *fp, int events, struct ucred *active_cred)
593 {
594 return (0);
595 }
596
597 /*
598 * MPSAFE
599 */
600 static int
601 cryptof_kqfilter(struct file *fp, struct knote *kn)
602 {
603
604 return (0);
605 }
606
607 /*
608 * MPSAFE
609 */
610 static int
611 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred)
612 {
613 return (EOPNOTSUPP);
614 }
615
616 /*
617 * MPALMOSTSAFE - acquires mplock
618 */
619 static int
620 cryptof_close(struct file *fp)
621 {
622 struct fcrypt *fcr;
623 struct csession *cse;
624
625 get_mplock();
626 fcr = (struct fcrypt *)fp->f_data;
627 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
628 TAILQ_REMOVE(&fcr->csessions, cse, next);
629 (void)csefree(cse);
630 }
631 fp->f_data = NULL;
632 rel_mplock();
633
634 FREE(fcr, M_XDATA);
635 return (0);
636 }
637
638 static struct csession *
639 csefind(struct fcrypt *fcr, u_int ses)
640 {
641 struct csession *cse;
642
643 TAILQ_FOREACH(cse, &fcr->csessions, next)
644 if (cse->ses == ses)
645 return (cse);
646 return (NULL);
647 }
648
649 static int
650 csedelete(struct fcrypt *fcr, struct csession *cse_del)
651 {
652 struct csession *cse;
653
654 TAILQ_FOREACH(cse, &fcr->csessions, next) {
655 if (cse == cse_del) {
656 TAILQ_REMOVE(&fcr->csessions, cse, next);
657 return (1);
658 }
659 }
660 return (0);
661 }
662
663 static struct csession *
664 cseadd(struct fcrypt *fcr, struct csession *cse)
665 {
666 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
667 cse->ses = fcr->sesn++;
668 return (cse);
669 }
670
671 struct csession *
672 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
673 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
674 struct enc_xform *txform, struct auth_hash *thash)
675 {
676 struct csession *cse;
677
678 MALLOC(cse, struct csession *, sizeof(struct csession),
679 M_XDATA, M_NOWAIT);
680 if (cse == NULL)
681 return NULL;
682 cse->key = key;
683 cse->keylen = keylen/8;
684 cse->mackey = mackey;
685 cse->mackeylen = mackeylen/8;
686 cse->sid = sid;
687 cse->cipher = cipher;
688 cse->mac = mac;
689 cse->txform = txform;
690 cse->thash = thash;
691 cseadd(fcr, cse);
692 return (cse);
693 }
694
695 static int
696 csefree(struct csession *cse)
697 {
698 int error;
699
700 error = crypto_freesession(cse->sid);
701 if (cse->key)
702 FREE(cse->key, M_XDATA);
703 if (cse->mackey)
704 FREE(cse->mackey, M_XDATA);
705 FREE(cse, M_XDATA);
706 return (error);
707 }
708
709 static int
710 cryptoopen(struct dev_open_args *ap)
711 {
712 if (crypto_usercrypto == 0)
713 return (ENXIO);
714 return (0);
715 }
716
717 static int
718 cryptoread(struct dev_read_args *ap)
719 {
720 return (EIO);
721 }
722
723 static int
724 cryptowrite(struct dev_write_args *ap)
725 {
726 return (EIO);
727 }
728
729 static int
730 cryptoioctl(struct dev_ioctl_args *ap)
731 {
732 struct file *f;
733 struct fcrypt *fcr;
734 int fd, error;
735
736 switch (ap->a_cmd) {
737 case CRIOGET:
738 MALLOC(fcr, struct fcrypt *,
739 sizeof(struct fcrypt), M_XDATA, M_WAITOK);
740 TAILQ_INIT(&fcr->csessions);
741 fcr->sesn = 0;
742
743 KKASSERT(curproc);
744 error = falloc(curproc, &f, &fd);
745
746 if (error) {
747 FREE(fcr, M_XDATA);
748 return (error);
749 }
750 f->f_type = DTYPE_CRYPTO;
751 f->f_flag = FREAD | FWRITE;
752 f->f_ops = &cryptofops;
753 f->f_data = fcr;
754 fsetfd(curproc, f, fd);
755 *(u_int32_t *)ap->a_data = fd;
756 fdrop(f);
757 break;
758 default:
759 error = EINVAL;
760 break;
761 }
762 return (error);
763 }
764
765 #define CRYPTO_MAJOR 70 /* from openbsd */
766 static struct dev_ops crypto_ops = {
767 { "crypto", CRYPTO_MAJOR, 0 },
768 .d_open = cryptoopen,
769 .d_close = nullclose,
770 .d_read = cryptoread,
771 .d_write = cryptowrite,
772 .d_ioctl = cryptoioctl,
773 };
774
775 /*
776 * Initialization code, both for static and dynamic loading.
777 */
778 static int
779 cryptodev_modevent(module_t mod, int type, void *unused)
780 {
781 switch (type) {
782 case MOD_LOAD:
783 if (bootverbose)
784 kprintf("crypto: <crypto device>\n");
785 dev_ops_add(&crypto_ops, 0, 0);
786 make_dev(&crypto_ops, 0, UID_ROOT, GID_WHEEL,
787 0666, "crypto");
788 return 0;
789 case MOD_UNLOAD:
790 /*XXX disallow if active sessions */
791 dev_ops_remove(&crypto_ops, 0, 0);
792 return 0;
793 }
794 return EINVAL;
795 }
796
797 static moduledata_t cryptodev_mod = {
798 "cryptodev",
799 cryptodev_modevent,
800 0
801 };
802 MODULE_VERSION(cryptodev, 1);
803 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
804 #if 0
805 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
806 #endif
DragonFly BSD