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 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * Effort sponsored in part by the Defense Advanced Research Projects
31 * Agency (DARPA) and Air Force Research Laboratory, Air Force
32 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.39 2008/10/23 20:26:15 des Exp $");
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
41 #include <sys/mbuf.h>
42 #include <sys/lock.h>
43 #include <sys/mutex.h>
44 #include <sys/sysctl.h>
45 #include <sys/file.h>
46 #include <sys/filedesc.h>
47 #include <sys/errno.h>
48 #include <sys/uio.h>
49 #include <sys/random.h>
50 #include <sys/conf.h>
51 #include <sys/kernel.h>
52 #include <sys/module.h>
53 #include <sys/fcntl.h>
54 #include <sys/bus.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 struct mtx lock; /* for op submission */
64
65 u_int32_t cipher;
66 struct enc_xform *txform;
67 u_int32_t mac;
68 struct auth_hash *thash;
69
70 caddr_t key;
71 int keylen;
72 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
73
74 caddr_t mackey;
75 int mackeylen;
76
77 struct iovec iovec;
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, struct thread *);
89 static int cryptof_truncate(struct file *, off_t, struct ucred *,
90 struct thread *);
91 static int cryptof_ioctl(struct file *, u_long, void *,
92 struct ucred *, struct thread *);
93 static int cryptof_poll(struct file *, int, struct ucred *, struct thread *);
94 static int cryptof_kqfilter(struct file *, struct knote *);
95 static int cryptof_stat(struct file *, struct stat *,
96 struct ucred *, struct thread *);
97 static int cryptof_close(struct file *, struct thread *);
98
99 static struct fileops cryptofops = {
100 .fo_read = cryptof_rw,
101 .fo_write = cryptof_rw,
102 .fo_truncate = cryptof_truncate,
103 .fo_ioctl = cryptof_ioctl,
104 .fo_poll = cryptof_poll,
105 .fo_kqfilter = cryptof_kqfilter,
106 .fo_stat = cryptof_stat,
107 .fo_close = cryptof_close
108 };
109
110 static struct csession *csefind(struct fcrypt *, u_int);
111 static int csedelete(struct fcrypt *, struct csession *);
112 static struct csession *cseadd(struct fcrypt *, struct csession *);
113 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
114 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
115 struct auth_hash *);
116 static int csefree(struct csession *);
117
118 static int cryptodev_op(struct csession *, struct crypt_op *,
119 struct ucred *, struct thread *td);
120 static int cryptodev_key(struct crypt_kop *);
121 static int cryptodev_find(struct crypt_find_op *);
122
123 static int
124 cryptof_rw(
125 struct file *fp,
126 struct uio *uio,
127 struct ucred *active_cred,
128 int flags,
129 struct thread *td)
130 {
131
132 return (EIO);
133 }
134
135 static int
136 cryptof_truncate(
137 struct file *fp,
138 off_t length,
139 struct ucred *active_cred,
140 struct thread *td)
141 {
142
143 return (EINVAL);
144 }
145
146 /*
147 * Check a crypto identifier to see if it requested
148 * a software device/driver. This can be done either
149 * by device name/class or through search constraints.
150 */
151 static int
152 checkforsoftware(int crid)
153 {
154 if (crid & CRYPTOCAP_F_SOFTWARE)
155 return EINVAL; /* XXX */
156 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
157 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
158 return EINVAL; /* XXX */
159 return 0;
160 }
161
162 /* ARGSUSED */
163 static int
164 cryptof_ioctl(
165 struct file *fp,
166 u_long cmd,
167 void *data,
168 struct ucred *active_cred,
169 struct thread *td)
170 {
171 #define SES2(p) ((struct session2_op *)p)
172 struct cryptoini cria, crie;
173 struct fcrypt *fcr = fp->f_data;
174 struct csession *cse;
175 struct session_op *sop;
176 struct crypt_op *cop;
177 struct enc_xform *txform = NULL;
178 struct auth_hash *thash = NULL;
179 struct crypt_kop *kop;
180 u_int64_t sid;
181 u_int32_t ses;
182 int error = 0, crid;
183
184 switch (cmd) {
185 case CIOCGSESSION:
186 case CIOCGSESSION2:
187 sop = (struct session_op *)data;
188 switch (sop->cipher) {
189 case 0:
190 break;
191 case CRYPTO_DES_CBC:
192 txform = &enc_xform_des;
193 break;
194 case CRYPTO_3DES_CBC:
195 txform = &enc_xform_3des;
196 break;
197 case CRYPTO_BLF_CBC:
198 txform = &enc_xform_blf;
199 break;
200 case CRYPTO_CAST_CBC:
201 txform = &enc_xform_cast5;
202 break;
203 case CRYPTO_SKIPJACK_CBC:
204 txform = &enc_xform_skipjack;
205 break;
206 case CRYPTO_AES_CBC:
207 txform = &enc_xform_rijndael128;
208 break;
209 case CRYPTO_NULL_CBC:
210 txform = &enc_xform_null;
211 break;
212 case CRYPTO_ARC4:
213 txform = &enc_xform_arc4;
214 break;
215 case CRYPTO_CAMELLIA_CBC:
216 txform = &enc_xform_camellia;
217 break;
218 default:
219 return (EINVAL);
220 }
221
222 switch (sop->mac) {
223 case 0:
224 break;
225 case CRYPTO_MD5_HMAC:
226 thash = &auth_hash_hmac_md5;
227 break;
228 case CRYPTO_SHA1_HMAC:
229 thash = &auth_hash_hmac_sha1;
230 break;
231 case CRYPTO_SHA2_256_HMAC:
232 thash = &auth_hash_hmac_sha2_256;
233 break;
234 case CRYPTO_SHA2_384_HMAC:
235 thash = &auth_hash_hmac_sha2_384;
236 break;
237 case CRYPTO_SHA2_512_HMAC:
238 thash = &auth_hash_hmac_sha2_512;
239 break;
240 case CRYPTO_RIPEMD160_HMAC:
241 thash = &auth_hash_hmac_ripemd_160;
242 break;
243 #ifdef notdef
244 case CRYPTO_MD5:
245 thash = &auth_hash_md5;
246 break;
247 case CRYPTO_SHA1:
248 thash = &auth_hash_sha1;
249 break;
250 #endif
251 case CRYPTO_NULL_HMAC:
252 thash = &auth_hash_null;
253 break;
254 default:
255 return (EINVAL);
256 }
257
258 bzero(&crie, sizeof(crie));
259 bzero(&cria, sizeof(cria));
260
261 if (txform) {
262 crie.cri_alg = txform->type;
263 crie.cri_klen = sop->keylen * 8;
264 if (sop->keylen > txform->maxkey ||
265 sop->keylen < txform->minkey) {
266 error = EINVAL;
267 goto bail;
268 }
269
270 crie.cri_key = malloc(crie.cri_klen / 8,
271 M_XDATA, M_WAITOK);
272 if ((error = copyin(sop->key, crie.cri_key,
273 crie.cri_klen / 8)))
274 goto bail;
275 if (thash)
276 crie.cri_next = &cria;
277 }
278
279 if (thash) {
280 cria.cri_alg = thash->type;
281 cria.cri_klen = sop->mackeylen * 8;
282 if (sop->mackeylen != thash->keysize) {
283 error = EINVAL;
284 goto bail;
285 }
286
287 if (cria.cri_klen) {
288 cria.cri_key = malloc(cria.cri_klen / 8,
289 M_XDATA, M_WAITOK);
290 if ((error = copyin(sop->mackey, cria.cri_key,
291 cria.cri_klen / 8)))
292 goto bail;
293 }
294 }
295
296 /* NB: CIOGSESSION2 has the crid */
297 if (cmd == CIOCGSESSION2) {
298 crid = SES2(sop)->crid;
299 error = checkforsoftware(crid);
300 if (error)
301 goto bail;
302 } else
303 crid = CRYPTOCAP_F_HARDWARE;
304 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
305 if (error)
306 goto bail;
307
308 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
309 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
310 thash);
311
312 if (cse == NULL) {
313 crypto_freesession(sid);
314 error = EINVAL;
315 goto bail;
316 }
317 sop->ses = cse->ses;
318 if (cmd == CIOCGSESSION2) {
319 /* return hardware/driver id */
320 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
321 }
322 bail:
323 if (error) {
324 if (crie.cri_key)
325 free(crie.cri_key, M_XDATA);
326 if (cria.cri_key)
327 free(cria.cri_key, M_XDATA);
328 }
329 break;
330 case CIOCFSESSION:
331 ses = *(u_int32_t *)data;
332 cse = csefind(fcr, ses);
333 if (cse == NULL)
334 return (EINVAL);
335 csedelete(fcr, cse);
336 error = csefree(cse);
337 break;
338 case CIOCCRYPT:
339 cop = (struct crypt_op *)data;
340 cse = csefind(fcr, cop->ses);
341 if (cse == NULL)
342 return (EINVAL);
343 error = cryptodev_op(cse, cop, active_cred, td);
344 break;
345 case CIOCKEY:
346 case CIOCKEY2:
347 if (!crypto_userasymcrypto)
348 return (EPERM); /* XXX compat? */
349 mtx_lock(&Giant);
350 kop = (struct crypt_kop *)data;
351 if (cmd == CIOCKEY) {
352 /* NB: crypto core enforces s/w driver use */
353 kop->crk_crid =
354 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
355 }
356 error = cryptodev_key(kop);
357 mtx_unlock(&Giant);
358 break;
359 case CIOCASYMFEAT:
360 if (!crypto_userasymcrypto) {
361 /*
362 * NB: if user asym crypto operations are
363 * not permitted return "no algorithms"
364 * so well-behaved applications will just
365 * fallback to doing them in software.
366 */
367 *(int *)data = 0;
368 } else
369 error = crypto_getfeat((int *)data);
370 break;
371 case CIOCFINDDEV:
372 error = cryptodev_find((struct crypt_find_op *)data);
373 break;
374 default:
375 error = EINVAL;
376 break;
377 }
378 return (error);
379 #undef SES2
380 }
381
382 static int cryptodev_cb(void *);
383
384
385 static int
386 cryptodev_op(
387 struct csession *cse,
388 struct crypt_op *cop,
389 struct ucred *active_cred,
390 struct thread *td)
391 {
392 struct cryptop *crp = NULL;
393 struct cryptodesc *crde = NULL, *crda = NULL;
394 int error;
395
396 if (cop->len > 256*1024-4)
397 return (E2BIG);
398
399 if (cse->txform) {
400 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
401 return (EINVAL);
402 }
403
404 cse->uio.uio_iov = &cse->iovec;
405 cse->uio.uio_iovcnt = 1;
406 cse->uio.uio_offset = 0;
407 cse->uio.uio_resid = cop->len;
408 cse->uio.uio_segflg = UIO_SYSSPACE;
409 cse->uio.uio_rw = UIO_WRITE;
410 cse->uio.uio_td = td;
411 cse->uio.uio_iov[0].iov_len = cop->len;
412 if (cse->thash)
413 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
414 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len,
415 M_XDATA, M_WAITOK);
416
417 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
418 if (crp == NULL) {
419 error = ENOMEM;
420 goto bail;
421 }
422
423 if (cse->thash) {
424 crda = crp->crp_desc;
425 if (cse->txform)
426 crde = crda->crd_next;
427 } else {
428 if (cse->txform)
429 crde = crp->crp_desc;
430 else {
431 error = EINVAL;
432 goto bail;
433 }
434 }
435
436 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
437 goto bail;
438
439 if (crda) {
440 crda->crd_skip = 0;
441 crda->crd_len = cop->len;
442 crda->crd_inject = cop->len;
443
444 crda->crd_alg = cse->mac;
445 crda->crd_key = cse->mackey;
446 crda->crd_klen = cse->mackeylen * 8;
447 }
448
449 if (crde) {
450 if (cop->op == COP_ENCRYPT)
451 crde->crd_flags |= CRD_F_ENCRYPT;
452 else
453 crde->crd_flags &= ~CRD_F_ENCRYPT;
454 crde->crd_len = cop->len;
455 crde->crd_inject = 0;
456
457 crde->crd_alg = cse->cipher;
458 crde->crd_key = cse->key;
459 crde->crd_klen = cse->keylen * 8;
460 }
461
462 crp->crp_ilen = cop->len;
463 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
464 | (cop->flags & COP_F_BATCH);
465 crp->crp_buf = (caddr_t)&cse->uio;
466 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
467 crp->crp_sid = cse->sid;
468 crp->crp_opaque = (void *)cse;
469
470 if (cop->iv) {
471 if (crde == NULL) {
472 error = EINVAL;
473 goto bail;
474 }
475 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
476 error = EINVAL;
477 goto bail;
478 }
479 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
480 goto bail;
481 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
482 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
483 crde->crd_skip = 0;
484 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
485 crde->crd_skip = 0;
486 } else if (crde) {
487 crde->crd_flags |= CRD_F_IV_PRESENT;
488 crde->crd_skip = cse->txform->blocksize;
489 crde->crd_len -= cse->txform->blocksize;
490 }
491
492 if (cop->mac && crda == NULL) {
493 error = EINVAL;
494 goto bail;
495 }
496
497 /*
498 * Let the dispatch run unlocked, then, interlock against the
499 * callback before checking if the operation completed and going
500 * to sleep. This insures drivers don't inherit our lock which
501 * results in a lock order reversal between crypto_dispatch forced
502 * entry and the crypto_done callback into us.
503 */
504 error = crypto_dispatch(crp);
505 mtx_lock(&cse->lock);
506 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
507 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
508 mtx_unlock(&cse->lock);
509
510 if (error != 0)
511 goto bail;
512
513 if (crp->crp_etype != 0) {
514 error = crp->crp_etype;
515 goto bail;
516 }
517
518 if (cse->error) {
519 error = cse->error;
520 goto bail;
521 }
522
523 if (cop->dst &&
524 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
525 goto bail;
526
527 if (cop->mac &&
528 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
529 cop->mac, cse->thash->hashsize)))
530 goto bail;
531
532 bail:
533 if (crp)
534 crypto_freereq(crp);
535 if (cse->uio.uio_iov[0].iov_base)
536 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
537
538 return (error);
539 }
540
541 static int
542 cryptodev_cb(void *op)
543 {
544 struct cryptop *crp = (struct cryptop *) op;
545 struct csession *cse = (struct csession *)crp->crp_opaque;
546 int error;
547
548 error = crp->crp_etype;
549 if (error == EAGAIN)
550 error = crypto_dispatch(crp);
551 mtx_lock(&cse->lock);
552 if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) {
553 cse->error = error;
554 wakeup_one(crp);
555 }
556 mtx_unlock(&cse->lock);
557 return (0);
558 }
559
560 static int
561 cryptodevkey_cb(void *op)
562 {
563 struct cryptkop *krp = (struct cryptkop *) op;
564
565 wakeup_one(krp);
566 return (0);
567 }
568
569 static int
570 cryptodev_key(struct crypt_kop *kop)
571 {
572 struct cryptkop *krp = NULL;
573 int error = EINVAL;
574 int in, out, size, i;
575
576 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
577 return (EFBIG);
578 }
579
580 in = kop->crk_iparams;
581 out = kop->crk_oparams;
582 switch (kop->crk_op) {
583 case CRK_MOD_EXP:
584 if (in == 3 && out == 1)
585 break;
586 return (EINVAL);
587 case CRK_MOD_EXP_CRT:
588 if (in == 6 && out == 1)
589 break;
590 return (EINVAL);
591 case CRK_DSA_SIGN:
592 if (in == 5 && out == 2)
593 break;
594 return (EINVAL);
595 case CRK_DSA_VERIFY:
596 if (in == 7 && out == 0)
597 break;
598 return (EINVAL);
599 case CRK_DH_COMPUTE_KEY:
600 if (in == 3 && out == 1)
601 break;
602 return (EINVAL);
603 default:
604 return (EINVAL);
605 }
606
607 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
608 if (!krp)
609 return (ENOMEM);
610 krp->krp_op = kop->crk_op;
611 krp->krp_status = kop->crk_status;
612 krp->krp_iparams = kop->crk_iparams;
613 krp->krp_oparams = kop->crk_oparams;
614 krp->krp_crid = kop->crk_crid;
615 krp->krp_status = 0;
616 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
617
618 for (i = 0; i < CRK_MAXPARAM; i++) {
619 if (kop->crk_param[i].crp_nbits > 65536)
620 /* Limit is the same as in OpenBSD */
621 goto fail;
622 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
623 }
624 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
625 size = (krp->krp_param[i].crp_nbits + 7) / 8;
626 if (size == 0)
627 continue;
628 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
629 if (i >= krp->krp_iparams)
630 continue;
631 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
632 if (error)
633 goto fail;
634 }
635
636 error = crypto_kdispatch(krp);
637 if (error)
638 goto fail;
639 error = tsleep(krp, PSOCK, "crydev", 0);
640 if (error) {
641 /* XXX can this happen? if so, how do we recover? */
642 goto fail;
643 }
644
645 kop->crk_crid = krp->krp_crid; /* device that did the work */
646 if (krp->krp_status != 0) {
647 error = krp->krp_status;
648 goto fail;
649 }
650
651 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
652 size = (krp->krp_param[i].crp_nbits + 7) / 8;
653 if (size == 0)
654 continue;
655 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
656 if (error)
657 goto fail;
658 }
659
660 fail:
661 if (krp) {
662 kop->crk_status = krp->krp_status;
663 for (i = 0; i < CRK_MAXPARAM; i++) {
664 if (krp->krp_param[i].crp_p)
665 free(krp->krp_param[i].crp_p, M_XDATA);
666 }
667 free(krp, M_XDATA);
668 }
669 return (error);
670 }
671
672 static int
673 cryptodev_find(struct crypt_find_op *find)
674 {
675 device_t dev;
676
677 if (find->crid != -1) {
678 dev = crypto_find_device_byhid(find->crid);
679 if (dev == NULL)
680 return (ENOENT);
681 strlcpy(find->name, device_get_nameunit(dev),
682 sizeof(find->name));
683 } else {
684 find->crid = crypto_find_driver(find->name);
685 if (find->crid == -1)
686 return (ENOENT);
687 }
688 return (0);
689 }
690
691 /* ARGSUSED */
692 static int
693 cryptof_poll(
694 struct file *fp,
695 int events,
696 struct ucred *active_cred,
697 struct thread *td)
698 {
699
700 return (0);
701 }
702
703 /* ARGSUSED */
704 static int
705 cryptof_kqfilter(struct file *fp, struct knote *kn)
706 {
707
708 return (0);
709 }
710
711 /* ARGSUSED */
712 static int
713 cryptof_stat(
714 struct file *fp,
715 struct stat *sb,
716 struct ucred *active_cred,
717 struct thread *td)
718 {
719
720 return (EOPNOTSUPP);
721 }
722
723 /* ARGSUSED */
724 static int
725 cryptof_close(struct file *fp, struct thread *td)
726 {
727 struct fcrypt *fcr = fp->f_data;
728 struct csession *cse;
729
730 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
731 TAILQ_REMOVE(&fcr->csessions, cse, next);
732 (void)csefree(cse);
733 }
734 free(fcr, M_XDATA);
735 fp->f_data = NULL;
736 return 0;
737 }
738
739 static struct csession *
740 csefind(struct fcrypt *fcr, u_int ses)
741 {
742 struct csession *cse;
743
744 TAILQ_FOREACH(cse, &fcr->csessions, next)
745 if (cse->ses == ses)
746 return (cse);
747 return (NULL);
748 }
749
750 static int
751 csedelete(struct fcrypt *fcr, struct csession *cse_del)
752 {
753 struct csession *cse;
754
755 TAILQ_FOREACH(cse, &fcr->csessions, next) {
756 if (cse == cse_del) {
757 TAILQ_REMOVE(&fcr->csessions, cse, next);
758 return (1);
759 }
760 }
761 return (0);
762 }
763
764 static struct csession *
765 cseadd(struct fcrypt *fcr, struct csession *cse)
766 {
767 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
768 cse->ses = fcr->sesn++;
769 return (cse);
770 }
771
772 struct csession *
773 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
774 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
775 struct enc_xform *txform, struct auth_hash *thash)
776 {
777 struct csession *cse;
778
779 #ifdef INVARIANTS
780 /* NB: required when mtx_init is built with INVARIANTS */
781 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
782 #else
783 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT);
784 #endif
785 if (cse == NULL)
786 return NULL;
787 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
788 cse->key = key;
789 cse->keylen = keylen/8;
790 cse->mackey = mackey;
791 cse->mackeylen = mackeylen/8;
792 cse->sid = sid;
793 cse->cipher = cipher;
794 cse->mac = mac;
795 cse->txform = txform;
796 cse->thash = thash;
797 cseadd(fcr, cse);
798 return (cse);
799 }
800
801 static int
802 csefree(struct csession *cse)
803 {
804 int error;
805
806 error = crypto_freesession(cse->sid);
807 mtx_destroy(&cse->lock);
808 if (cse->key)
809 free(cse->key, M_XDATA);
810 if (cse->mackey)
811 free(cse->mackey, M_XDATA);
812 free(cse, M_XDATA);
813 return (error);
814 }
815
816 static int
817 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
818 {
819 return (0);
820 }
821
822 static int
823 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
824 {
825 return (EIO);
826 }
827
828 static int
829 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
830 {
831 return (EIO);
832 }
833
834 static int
835 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
836 {
837 struct file *f;
838 struct fcrypt *fcr;
839 int fd, error;
840
841 switch (cmd) {
842 case CRIOGET:
843 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
844 TAILQ_INIT(&fcr->csessions);
845 fcr->sesn = 0;
846
847 error = falloc(td, &f, &fd);
848
849 if (error) {
850 free(fcr, M_XDATA);
851 return (error);
852 }
853 /* falloc automatically provides an extra reference to 'f'. */
854 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
855 *(u_int32_t *)data = fd;
856 fdrop(f, td);
857 break;
858 case CRIOFINDDEV:
859 error = cryptodev_find((struct crypt_find_op *)data);
860 break;
861 case CRIOASYMFEAT:
862 error = crypto_getfeat((int *)data);
863 break;
864 default:
865 error = EINVAL;
866 break;
867 }
868 return (error);
869 }
870
871 static struct cdevsw crypto_cdevsw = {
872 .d_version = D_VERSION,
873 .d_flags = D_NEEDGIANT,
874 .d_open = cryptoopen,
875 .d_read = cryptoread,
876 .d_write = cryptowrite,
877 .d_ioctl = cryptoioctl,
878 .d_name = "crypto",
879 };
880 static struct cdev *crypto_dev;
881
882 /*
883 * Initialization code, both for static and dynamic loading.
884 */
885 static int
886 cryptodev_modevent(module_t mod, int type, void *unused)
887 {
888 switch (type) {
889 case MOD_LOAD:
890 if (bootverbose)
891 printf("crypto: <crypto device>\n");
892 crypto_dev = make_dev(&crypto_cdevsw, 0,
893 UID_ROOT, GID_WHEEL, 0666,
894 "crypto");
895 return 0;
896 case MOD_UNLOAD:
897 /*XXX disallow if active sessions */
898 destroy_dev(crypto_dev);
899 return 0;
900 }
901 return EINVAL;
902 }
903
904 static moduledata_t cryptodev_mod = {
905 "cryptodev",
906 cryptodev_modevent,
907 0
908 };
909 MODULE_VERSION(cryptodev, 1);
910 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
911 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
912 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
913
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