1 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
2
3 /*-
4 * Copyright (c) 2001 Theo de Raadt
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Effort sponsored in part by the Defense Advanced Research Projects
30 * Agency (DARPA) and Air Force Research Laboratory, Air Force
31 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
32 */
33
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.22.2.2 2005/08/19 12:06:40 pjd Exp $");
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/malloc.h>
40 #include <sys/mbuf.h>
41 #include <sys/lock.h>
42 #include <sys/mutex.h>
43 #include <sys/sysctl.h>
44 #include <sys/file.h>
45 #include <sys/filedesc.h>
46 #include <sys/errno.h>
47 #include <sys/uio.h>
48 #include <sys/random.h>
49 #include <sys/conf.h>
50 #include <sys/kernel.h>
51 #include <sys/module.h>
52 #include <sys/fcntl.h>
53
54 #include <opencrypto/cryptodev.h>
55 #include <opencrypto/xform.h>
56
57 struct csession {
58 TAILQ_ENTRY(csession) next;
59 u_int64_t sid;
60 u_int32_t ses;
61 struct mtx lock; /* for op submission */
62
63 u_int32_t cipher;
64 struct enc_xform *txform;
65 u_int32_t mac;
66 struct auth_hash *thash;
67
68 caddr_t key;
69 int keylen;
70 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
71
72 caddr_t mackey;
73 int mackeylen;
74 u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
75
76 struct iovec iovec;
77 struct uio uio;
78 int error;
79 };
80
81 struct fcrypt {
82 TAILQ_HEAD(csessionlist, csession) csessions;
83 int sesn;
84 };
85
86 static int cryptof_rw(struct file *fp, struct uio *uio,
87 struct ucred *cred, int flags, struct thread *);
88 static int cryptof_ioctl(struct file *, u_long, void *,
89 struct ucred *, struct thread *);
90 static int cryptof_poll(struct file *, int, struct ucred *, struct thread *);
91 static int cryptof_kqfilter(struct file *, struct knote *);
92 static int cryptof_stat(struct file *, struct stat *,
93 struct ucred *, struct thread *);
94 static int cryptof_close(struct file *, struct thread *);
95
96 static struct fileops cryptofops = {
97 .fo_read = cryptof_rw,
98 .fo_write = cryptof_rw,
99 .fo_ioctl = cryptof_ioctl,
100 .fo_poll = cryptof_poll,
101 .fo_kqfilter = cryptof_kqfilter,
102 .fo_stat = cryptof_stat,
103 .fo_close = cryptof_close
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 struct ucred *, struct thread *td);
116 static int cryptodev_key(struct crypt_kop *);
117
118 static int
119 cryptof_rw(
120 struct file *fp,
121 struct uio *uio,
122 struct ucred *active_cred,
123 int flags,
124 struct thread *td)
125 {
126
127 return (EIO);
128 }
129
130 /* ARGSUSED */
131 static int
132 cryptof_ioctl(
133 struct file *fp,
134 u_long cmd,
135 void *data,
136 struct ucred *active_cred,
137 struct thread *td)
138 {
139 struct cryptoini cria, crie;
140 struct fcrypt *fcr = fp->f_data;
141 struct csession *cse;
142 struct session_op *sop;
143 struct crypt_op *cop;
144 struct enc_xform *txform = NULL;
145 struct auth_hash *thash = NULL;
146 u_int64_t sid;
147 u_int32_t ses;
148 int error = 0;
149
150 switch (cmd) {
151 case CIOCGSESSION:
152 sop = (struct session_op *)data;
153 switch (sop->cipher) {
154 case 0:
155 break;
156 case CRYPTO_DES_CBC:
157 txform = &enc_xform_des;
158 break;
159 case CRYPTO_3DES_CBC:
160 txform = &enc_xform_3des;
161 break;
162 case CRYPTO_BLF_CBC:
163 txform = &enc_xform_blf;
164 break;
165 case CRYPTO_CAST_CBC:
166 txform = &enc_xform_cast5;
167 break;
168 case CRYPTO_SKIPJACK_CBC:
169 txform = &enc_xform_skipjack;
170 break;
171 case CRYPTO_AES_CBC:
172 txform = &enc_xform_rijndael128;
173 break;
174 case CRYPTO_NULL_CBC:
175 txform = &enc_xform_null;
176 break;
177 case CRYPTO_ARC4:
178 txform = &enc_xform_arc4;
179 break;
180 default:
181 return (EINVAL);
182 }
183
184 switch (sop->mac) {
185 case 0:
186 break;
187 case CRYPTO_MD5_HMAC:
188 thash = &auth_hash_hmac_md5_96;
189 break;
190 case CRYPTO_SHA1_HMAC:
191 thash = &auth_hash_hmac_sha1_96;
192 break;
193 case CRYPTO_SHA2_HMAC:
194 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
195 thash = &auth_hash_hmac_sha2_256;
196 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
197 thash = &auth_hash_hmac_sha2_384;
198 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
199 thash = &auth_hash_hmac_sha2_512;
200 else
201 return (EINVAL);
202 break;
203 case CRYPTO_RIPEMD160_HMAC:
204 thash = &auth_hash_hmac_ripemd_160_96;
205 break;
206 #ifdef notdef
207 case CRYPTO_MD5:
208 thash = &auth_hash_md5;
209 break;
210 case CRYPTO_SHA1:
211 thash = &auth_hash_sha1;
212 break;
213 #endif
214 case CRYPTO_NULL_HMAC:
215 thash = &auth_hash_null;
216 break;
217 default:
218 return (EINVAL);
219 }
220
221 bzero(&crie, sizeof(crie));
222 bzero(&cria, sizeof(cria));
223
224 if (txform) {
225 crie.cri_alg = txform->type;
226 crie.cri_klen = sop->keylen * 8;
227 if (sop->keylen > txform->maxkey ||
228 sop->keylen < txform->minkey) {
229 error = EINVAL;
230 goto bail;
231 }
232
233 MALLOC(crie.cri_key, u_int8_t *,
234 crie.cri_klen / 8, M_XDATA, M_WAITOK);
235 if ((error = copyin(sop->key, crie.cri_key,
236 crie.cri_klen / 8)))
237 goto bail;
238 if (thash)
239 crie.cri_next = &cria;
240 }
241
242 if (thash) {
243 cria.cri_alg = thash->type;
244 cria.cri_klen = sop->mackeylen * 8;
245 if (sop->mackeylen != thash->keysize) {
246 error = EINVAL;
247 goto bail;
248 }
249
250 if (cria.cri_klen) {
251 MALLOC(cria.cri_key, u_int8_t *,
252 cria.cri_klen / 8, M_XDATA, M_WAITOK);
253 if ((error = copyin(sop->mackey, cria.cri_key,
254 cria.cri_klen / 8)))
255 goto bail;
256 }
257 }
258
259 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1);
260 if (error)
261 goto bail;
262
263 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
264 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
265 thash);
266
267 if (cse == NULL) {
268 crypto_freesession(sid);
269 error = EINVAL;
270 goto bail;
271 }
272 sop->ses = cse->ses;
273
274 bail:
275 if (error) {
276 if (crie.cri_key)
277 FREE(crie.cri_key, M_XDATA);
278 if (cria.cri_key)
279 FREE(cria.cri_key, M_XDATA);
280 }
281 break;
282 case CIOCFSESSION:
283 ses = *(u_int32_t *)data;
284 cse = csefind(fcr, ses);
285 if (cse == NULL)
286 return (EINVAL);
287 csedelete(fcr, cse);
288 error = csefree(cse);
289 break;
290 case CIOCCRYPT:
291 cop = (struct crypt_op *)data;
292 cse = csefind(fcr, cop->ses);
293 if (cse == NULL)
294 return (EINVAL);
295 error = cryptodev_op(cse, cop, active_cred, td);
296 break;
297 case CIOCKEY:
298 error = cryptodev_key((struct crypt_kop *)data);
299 break;
300 case CIOCASYMFEAT:
301 error = crypto_getfeat((int *)data);
302 break;
303 default:
304 error = EINVAL;
305 }
306 return (error);
307 }
308
309 static int cryptodev_cb(void *);
310
311
312 static int
313 cryptodev_op(
314 struct csession *cse,
315 struct crypt_op *cop,
316 struct ucred *active_cred,
317 struct thread *td)
318 {
319 struct cryptop *crp = NULL;
320 struct cryptodesc *crde = NULL, *crda = NULL;
321 int error;
322
323 if (cop->len > 256*1024-4)
324 return (E2BIG);
325
326 if (cse->txform) {
327 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
328 return (EINVAL);
329 }
330
331 cse->uio.uio_iov = &cse->iovec;
332 cse->uio.uio_iovcnt = 1;
333 cse->uio.uio_offset = 0;
334 cse->uio.uio_resid = cop->len;
335 cse->uio.uio_segflg = UIO_SYSSPACE;
336 cse->uio.uio_rw = UIO_WRITE;
337 cse->uio.uio_td = td;
338 cse->uio.uio_iov[0].iov_len = cop->len;
339 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
340
341 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
342 if (crp == NULL) {
343 error = ENOMEM;
344 goto bail;
345 }
346
347 if (cse->thash) {
348 crda = crp->crp_desc;
349 if (cse->txform)
350 crde = crda->crd_next;
351 } else {
352 if (cse->txform)
353 crde = crp->crp_desc;
354 else {
355 error = EINVAL;
356 goto bail;
357 }
358 }
359
360 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
361 goto bail;
362
363 if (crda) {
364 crda->crd_skip = 0;
365 crda->crd_len = cop->len;
366 crda->crd_inject = 0; /* ??? */
367
368 crda->crd_alg = cse->mac;
369 crda->crd_key = cse->mackey;
370 crda->crd_klen = cse->mackeylen * 8;
371 }
372
373 if (crde) {
374 if (cop->op == COP_ENCRYPT)
375 crde->crd_flags |= CRD_F_ENCRYPT;
376 else
377 crde->crd_flags &= ~CRD_F_ENCRYPT;
378 crde->crd_len = cop->len;
379 crde->crd_inject = 0;
380
381 crde->crd_alg = cse->cipher;
382 crde->crd_key = cse->key;
383 crde->crd_klen = cse->keylen * 8;
384 }
385
386 crp->crp_ilen = cop->len;
387 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
388 | (cop->flags & COP_F_BATCH);
389 crp->crp_buf = (caddr_t)&cse->uio;
390 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
391 crp->crp_sid = cse->sid;
392 crp->crp_opaque = (void *)cse;
393
394 if (cop->iv) {
395 if (crde == NULL) {
396 error = EINVAL;
397 goto bail;
398 }
399 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
400 error = EINVAL;
401 goto bail;
402 }
403 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
404 goto bail;
405 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
406 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
407 crde->crd_skip = 0;
408 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
409 crde->crd_skip = 0;
410 } else if (crde) {
411 crde->crd_flags |= CRD_F_IV_PRESENT;
412 crde->crd_skip = cse->txform->blocksize;
413 crde->crd_len -= cse->txform->blocksize;
414 }
415
416 if (cop->mac) {
417 if (crda == NULL) {
418 error = EINVAL;
419 goto bail;
420 }
421 crp->crp_mac=cse->tmp_mac;
422 }
423
424 /*
425 * Let the dispatch run unlocked, then, interlock against the
426 * callback before checking if the operation completed and going
427 * to sleep. This insures drivers don't inherit our lock which
428 * results in a lock order reversal between crypto_dispatch forced
429 * entry and the crypto_done callback into us.
430 */
431 error = crypto_dispatch(crp);
432 mtx_lock(&cse->lock);
433 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
434 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
435 mtx_unlock(&cse->lock);
436
437 if (error != 0)
438 goto bail;
439
440 if (crp->crp_etype != 0) {
441 error = crp->crp_etype;
442 goto bail;
443 }
444
445 if (cse->error) {
446 error = cse->error;
447 goto bail;
448 }
449
450 if (cop->dst &&
451 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
452 goto bail;
453
454 if (cop->mac &&
455 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
456 goto bail;
457
458 bail:
459 if (crp)
460 crypto_freereq(crp);
461 if (cse->uio.uio_iov[0].iov_base)
462 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
463
464 return (error);
465 }
466
467 static int
468 cryptodev_cb(void *op)
469 {
470 struct cryptop *crp = (struct cryptop *) op;
471 struct csession *cse = (struct csession *)crp->crp_opaque;
472
473 cse->error = crp->crp_etype;
474 if (crp->crp_etype == EAGAIN)
475 return crypto_dispatch(crp);
476 mtx_lock(&cse->lock);
477 wakeup_one(crp);
478 mtx_unlock(&cse->lock);
479 return (0);
480 }
481
482 static int
483 cryptodevkey_cb(void *op)
484 {
485 struct cryptkop *krp = (struct cryptkop *) op;
486
487 wakeup(krp);
488 return (0);
489 }
490
491 static int
492 cryptodev_key(struct crypt_kop *kop)
493 {
494 struct cryptkop *krp = NULL;
495 int error = EINVAL;
496 int in, out, size, i;
497
498 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
499 return (EFBIG);
500 }
501
502 in = kop->crk_iparams;
503 out = kop->crk_oparams;
504 switch (kop->crk_op) {
505 case CRK_MOD_EXP:
506 if (in == 3 && out == 1)
507 break;
508 return (EINVAL);
509 case CRK_MOD_EXP_CRT:
510 if (in == 6 && out == 1)
511 break;
512 return (EINVAL);
513 case CRK_DSA_SIGN:
514 if (in == 5 && out == 2)
515 break;
516 return (EINVAL);
517 case CRK_DSA_VERIFY:
518 if (in == 7 && out == 0)
519 break;
520 return (EINVAL);
521 case CRK_DH_COMPUTE_KEY:
522 if (in == 3 && out == 1)
523 break;
524 return (EINVAL);
525 default:
526 return (EINVAL);
527 }
528
529 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK);
530 if (!krp)
531 return (ENOMEM);
532 bzero(krp, sizeof *krp);
533 krp->krp_op = kop->crk_op;
534 krp->krp_status = kop->crk_status;
535 krp->krp_iparams = kop->crk_iparams;
536 krp->krp_oparams = kop->crk_oparams;
537 krp->krp_status = 0;
538 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
539
540 for (i = 0; i < CRK_MAXPARAM; i++)
541 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
542 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
543 size = (krp->krp_param[i].crp_nbits + 7) / 8;
544 if (size == 0)
545 continue;
546 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK);
547 if (i >= krp->krp_iparams)
548 continue;
549 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
550 if (error)
551 goto fail;
552 }
553
554 error = crypto_kdispatch(krp);
555 if (error)
556 goto fail;
557 error = tsleep(krp, PSOCK, "crydev", 0);
558 if (error) {
559 /* XXX can this happen? if so, how do we recover? */
560 goto fail;
561 }
562
563 if (krp->krp_status != 0) {
564 error = krp->krp_status;
565 goto fail;
566 }
567
568 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
569 size = (krp->krp_param[i].crp_nbits + 7) / 8;
570 if (size == 0)
571 continue;
572 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
573 if (error)
574 goto fail;
575 }
576
577 fail:
578 if (krp) {
579 kop->crk_status = krp->krp_status;
580 for (i = 0; i < CRK_MAXPARAM; i++) {
581 if (krp->krp_param[i].crp_p)
582 FREE(krp->krp_param[i].crp_p, M_XDATA);
583 }
584 free(krp, M_XDATA);
585 }
586 return (error);
587 }
588
589 /* ARGSUSED */
590 static int
591 cryptof_poll(
592 struct file *fp,
593 int events,
594 struct ucred *active_cred,
595 struct thread *td)
596 {
597
598 return (0);
599 }
600
601 /* ARGSUSED */
602 static int
603 cryptof_kqfilter(struct file *fp, struct knote *kn)
604 {
605
606 return (0);
607 }
608
609 /* ARGSUSED */
610 static int
611 cryptof_stat(
612 struct file *fp,
613 struct stat *sb,
614 struct ucred *active_cred,
615 struct thread *td)
616 {
617
618 return (EOPNOTSUPP);
619 }
620
621 /* ARGSUSED */
622 static int
623 cryptof_close(struct file *fp, struct thread *td)
624 {
625 struct fcrypt *fcr = fp->f_data;
626 struct csession *cse;
627
628 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
629 TAILQ_REMOVE(&fcr->csessions, cse, next);
630 (void)csefree(cse);
631 }
632 FREE(fcr, M_XDATA);
633 fp->f_data = NULL;
634 return 0;
635 }
636
637 static struct csession *
638 csefind(struct fcrypt *fcr, u_int ses)
639 {
640 struct csession *cse;
641
642 TAILQ_FOREACH(cse, &fcr->csessions, next)
643 if (cse->ses == ses)
644 return (cse);
645 return (NULL);
646 }
647
648 static int
649 csedelete(struct fcrypt *fcr, struct csession *cse_del)
650 {
651 struct csession *cse;
652
653 TAILQ_FOREACH(cse, &fcr->csessions, next) {
654 if (cse == cse_del) {
655 TAILQ_REMOVE(&fcr->csessions, cse, next);
656 return (1);
657 }
658 }
659 return (0);
660 }
661
662 static struct csession *
663 cseadd(struct fcrypt *fcr, struct csession *cse)
664 {
665 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
666 cse->ses = fcr->sesn++;
667 return (cse);
668 }
669
670 struct csession *
671 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
672 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
673 struct enc_xform *txform, struct auth_hash *thash)
674 {
675 struct csession *cse;
676
677 #ifdef INVARIANTS
678 /* NB: required when mtx_init is built with INVARIANTS */
679 MALLOC(cse, struct csession *, sizeof(struct csession),
680 M_XDATA, M_NOWAIT | M_ZERO);
681 #else
682 MALLOC(cse, struct csession *, sizeof(struct csession),
683 M_XDATA, M_NOWAIT);
684 #endif
685 if (cse == NULL)
686 return NULL;
687 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
688 cse->key = key;
689 cse->keylen = keylen/8;
690 cse->mackey = mackey;
691 cse->mackeylen = mackeylen/8;
692 cse->sid = sid;
693 cse->cipher = cipher;
694 cse->mac = mac;
695 cse->txform = txform;
696 cse->thash = thash;
697 cseadd(fcr, cse);
698 return (cse);
699 }
700
701 static int
702 csefree(struct csession *cse)
703 {
704 int error;
705
706 error = crypto_freesession(cse->sid);
707 mtx_destroy(&cse->lock);
708 if (cse->key)
709 FREE(cse->key, M_XDATA);
710 if (cse->mackey)
711 FREE(cse->mackey, M_XDATA);
712 FREE(cse, M_XDATA);
713 return (error);
714 }
715
716 static int
717 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
718 {
719 return (0);
720 }
721
722 static int
723 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
724 {
725 return (EIO);
726 }
727
728 static int
729 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
730 {
731 return (EIO);
732 }
733
734 static int
735 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
736 {
737 struct file *f;
738 struct fcrypt *fcr;
739 int fd, error;
740
741 switch (cmd) {
742 case CRIOGET:
743 MALLOC(fcr, struct fcrypt *,
744 sizeof(struct fcrypt), M_XDATA, M_WAITOK);
745 TAILQ_INIT(&fcr->csessions);
746 fcr->sesn = 0;
747
748 error = falloc(td, &f, &fd);
749
750 if (error) {
751 FREE(fcr, M_XDATA);
752 return (error);
753 }
754 /* falloc automatically provides an extra reference to 'f'. */
755 f->f_flag = FREAD | FWRITE;
756 f->f_type = DTYPE_CRYPTO;
757 f->f_ops = &cryptofops;
758 f->f_data = fcr;
759 *(u_int32_t *)data = fd;
760 fdrop(f, td);
761 break;
762 default:
763 error = EINVAL;
764 break;
765 }
766 return (error);
767 }
768
769 #define CRYPTO_MAJOR 70 /* from openbsd */
770 static struct cdevsw crypto_cdevsw = {
771 .d_version = D_VERSION,
772 .d_flags = D_NEEDGIANT,
773 .d_open = cryptoopen,
774 .d_read = cryptoread,
775 .d_write = cryptowrite,
776 .d_ioctl = cryptoioctl,
777 .d_name = "crypto",
778 .d_maj = CRYPTO_MAJOR,
779 };
780 static struct cdev *crypto_dev;
781
782 /*
783 * Initialization code, both for static and dynamic loading.
784 */
785 static int
786 cryptodev_modevent(module_t mod, int type, void *unused)
787 {
788 switch (type) {
789 case MOD_LOAD:
790 if (bootverbose)
791 printf("crypto: <crypto device>\n");
792 crypto_dev = make_dev(&crypto_cdevsw, 0,
793 UID_ROOT, GID_WHEEL, 0666,
794 "crypto");
795 return 0;
796 case MOD_UNLOAD:
797 /*XXX disallow if active sessions */
798 destroy_dev(crypto_dev);
799 return 0;
800 }
801 return EINVAL;
802 }
803
804 static moduledata_t cryptodev_mod = {
805 "cryptodev",
806 cryptodev_modevent,
807 0
808 };
809 MODULE_VERSION(cryptodev, 1);
810 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
811 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
Cache object: dea95564c5675b26cb7d154a2a8cd335
|