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kernel - Move mplock to machine-independent C
[dragonfly.git] / sys / opencrypto / cryptodev.c
blob8ce8655d7f2e931c8de8ed78028d1775c686e433
1 /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.41 2009/09/04 09:48:18 pjd Exp $ */
2 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
3
4 /*-
5 * Copyright (c) 2001 Theo de Raadt
6 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
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 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/malloc.h>
39 #include <sys/device.h>
40 #include <sys/mbuf.h>
41 #include <sys/lock.h>
42 #include <sys/sysctl.h>
43 #include <sys/file.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/module.h>
50 #include <sys/kernel.h>
51 #include <sys/fcntl.h>
52 #include <sys/proc.h>
53
54 #include <sys/file2.h>
55 #include <sys/thread2.h>
56 #include <sys/mplock2.h>
57
58 #include <opencrypto/cryptodev.h>
59 #include <opencrypto/xform.h>
60
61 struct csession {
62 TAILQ_ENTRY(csession) next;
63 u_int64_t sid;
64 u_int32_t ses;
65 struct lock lock;
66
67 u_int32_t cipher;
68 struct enc_xform *txform;
69 u_int32_t mac;
70 struct auth_hash *thash;
71
72 caddr_t key;
73 int keylen;
74 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
75
76 caddr_t mackey;
77 int mackeylen;
78
79 struct iovec iovec;
80 struct uio uio;
81 int error;
82 };
83
84 struct fcrypt {
85 TAILQ_HEAD(csessionlist, csession) csessions;
86 int sesn;
87 };
88
89 static int cryptof_rw(struct file *fp, struct uio *uio,
90 struct ucred *cred, int flags);
91 static int cryptof_ioctl(struct file *, u_long, caddr_t,
92 struct ucred *, struct sysmsg *);
93 static int cryptof_poll(struct file *, int, struct ucred *);
94 static int cryptof_kqfilter(struct file *, struct knote *);
95 static int cryptof_stat(struct file *, struct stat *, struct ucred *);
96 static int cryptof_close(struct file *);
97
98 static struct fileops cryptofops = {
99 .fo_read = cryptof_rw,
100 .fo_write = cryptof_rw,
101 .fo_ioctl = cryptof_ioctl,
102 .fo_poll = cryptof_poll,
103 .fo_kqfilter = cryptof_kqfilter,
104 .fo_stat = cryptof_stat,
105 .fo_close = cryptof_close,
106 .fo_shutdown = nofo_shutdown
107 };
108
109 static struct csession *csefind(struct fcrypt *, u_int);
110 static int csedelete(struct fcrypt *, struct csession *);
111 static struct csession *cseadd(struct fcrypt *, struct csession *);
112 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
113 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
114 struct auth_hash *);
115 static int csefree(struct csession *);
116
117 static int cryptodev_op(struct csession *, struct crypt_op *, struct ucred *);
118 static int cryptodev_key(struct crypt_kop *);
119 static int cryptodev_find(struct crypt_find_op *);
120
121 static int
122 cryptof_rw(
123 struct file *fp,
124 struct uio *uio,
125 struct ucred *active_cred,
126 int flags)
127 {
128 return (EIO);
129 }
130
131 /*
132 * Check a crypto identifier to see if it requested
133 * a software device/driver. This can be done either
134 * by device name/class or through search constraints.
135 */
136 static int
137 checkforsoftware(int crid)
138 {
139 if (crid & CRYPTOCAP_F_SOFTWARE)
140 return EINVAL; /* XXX */
141 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
142 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
143 return EINVAL; /* XXX */
144 return 0;
145 }
146
147 /* ARGSUSED */
148 static int
149 cryptof_ioctl(struct file *fp, u_long cmd, caddr_t data,
150 struct ucred *cred, struct sysmsg *msg)
151 {
152 #define SES2(p) ((struct session2_op *)p)
153 struct cryptoini cria, crie;
154 struct fcrypt *fcr = fp->f_data;
155 struct csession *cse;
156 struct session_op *sop;
157 struct crypt_op *cop;
158 struct enc_xform *txform = NULL;
159 struct auth_hash *thash = NULL;
160 struct crypt_kop *kop;
161 u_int64_t sid;
162 u_int32_t ses;
163 int error = 0, crid;
164
165 switch (cmd) {
166 case CIOCGSESSION:
167 case CIOCGSESSION2:
168 sop = (struct session_op *)data;
169 switch (sop->cipher) {
170 case 0:
171 break;
172 case CRYPTO_DES_CBC:
173 txform = &enc_xform_des;
174 break;
175 case CRYPTO_3DES_CBC:
176 txform = &enc_xform_3des;
177 break;
178 case CRYPTO_BLF_CBC:
179 txform = &enc_xform_blf;
180 break;
181 case CRYPTO_CAST_CBC:
182 txform = &enc_xform_cast5;
183 break;
184 case CRYPTO_SKIPJACK_CBC:
185 txform = &enc_xform_skipjack;
186 break;
187 case CRYPTO_AES_CBC:
188 txform = &enc_xform_rijndael128;
189 break;
190 case CRYPTO_NULL_CBC:
191 txform = &enc_xform_null;
192 break;
193 case CRYPTO_ARC4:
194 txform = &enc_xform_arc4;
195 break;
196 case CRYPTO_CAMELLIA_CBC:
197 txform = &enc_xform_camellia;
198 break;
199 default:
200 return (EINVAL);
201 }
202
203 switch (sop->mac) {
204 case 0:
205 break;
206 case CRYPTO_MD5_HMAC:
207 thash = &auth_hash_hmac_md5;
208 break;
209 case CRYPTO_SHA1_HMAC:
210 thash = &auth_hash_hmac_sha1;
211 break;
212 case CRYPTO_SHA2_256_HMAC:
213 thash = &auth_hash_hmac_sha2_256;
214 break;
215 case CRYPTO_SHA2_384_HMAC:
216 thash = &auth_hash_hmac_sha2_384;
217 break;
218 case CRYPTO_SHA2_512_HMAC:
219 thash = &auth_hash_hmac_sha2_512;
220 break;
221 case CRYPTO_RIPEMD160_HMAC:
222 thash = &auth_hash_hmac_ripemd_160;
223 break;
224 #ifdef notdef
225 case CRYPTO_MD5:
226 thash = &auth_hash_md5;
227 break;
228 case CRYPTO_SHA1:
229 thash = &auth_hash_sha1;
230 break;
231 #endif
232 case CRYPTO_NULL_HMAC:
233 thash = &auth_hash_null;
234 break;
235 default:
236 return (EINVAL);
237 }
238
239 bzero(&crie, sizeof(crie));
240 bzero(&cria, sizeof(cria));
241
242 if (txform) {
243 crie.cri_alg = txform->type;
244 crie.cri_klen = sop->keylen * 8;
245 if (sop->keylen > txform->maxkey ||
246 sop->keylen < txform->minkey) {
247 error = EINVAL;
248 goto bail;
249 }
250
251 crie.cri_key = kmalloc(crie.cri_klen / 8,
252 M_XDATA, M_WAITOK);
253 if ((error = copyin(sop->key, crie.cri_key,
254 crie.cri_klen / 8)))
255 goto bail;
256 if (thash)
257 crie.cri_next = &cria;
258 }
259
260 if (thash) {
261 cria.cri_alg = thash->type;
262 cria.cri_klen = sop->mackeylen * 8;
263 if (sop->mackeylen != thash->keysize) {
264 error = EINVAL;
265 goto bail;
266 }
267
268 if (cria.cri_klen) {
269 cria.cri_key = kmalloc(cria.cri_klen / 8,
270 M_XDATA, M_WAITOK);
271 if ((error = copyin(sop->mackey, cria.cri_key,
272 cria.cri_klen / 8)))
273 goto bail;
274 }
275 }
276
277 /* NB: CIOGSESSION2 has the crid */
278 if (cmd == CIOCGSESSION2) {
279 crid = SES2(sop)->crid;
280 error = checkforsoftware(crid);
281 if (error)
282 goto bail;
283 } else
284 crid = CRYPTOCAP_F_HARDWARE;
285 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
286 if (error)
287 goto bail;
288
289 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
290 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
291 thash);
292
293 if (cse == NULL) {
294 crypto_freesession(sid);
295 error = EINVAL;
296 goto bail;
297 }
298 sop->ses = cse->ses;
299 if (cmd == CIOCGSESSION2) {
300 /* return hardware/driver id */
301 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
302 }
303 bail:
304 if (error) {
305 if (crie.cri_key)
306 kfree(crie.cri_key, M_XDATA);
307 if (cria.cri_key)
308 kfree(cria.cri_key, M_XDATA);
309 }
310 break;
311 case CIOCFSESSION:
312 ses = *(u_int32_t *)data;
313 cse = csefind(fcr, ses);
314 if (cse == NULL)
315 return (EINVAL);
316 csedelete(fcr, cse);
317 error = csefree(cse);
318 break;
319 case CIOCCRYPT:
320 cop = (struct crypt_op *)data;
321 cse = csefind(fcr, cop->ses);
322 if (cse == NULL)
323 return (EINVAL);
324 error = cryptodev_op(cse, cop, cred);
325 break;
326 case CIOCKEY:
327 case CIOCKEY2:
328 if (!crypto_userasymcrypto)
329 return (EPERM); /* XXX compat? */
330 get_mplock();
331 kop = (struct crypt_kop *)data;
332 if (cmd == CIOCKEY) {
333 /* NB: crypto core enforces s/w driver use */
334 kop->crk_crid =
335 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
336 }
337 error = cryptodev_key(kop);
338 rel_mplock();
339 break;
340 case CIOCASYMFEAT:
341 if (!crypto_userasymcrypto) {
342 /*
343 * NB: if user asym crypto operations are
344 * not permitted return "no algorithms"
345 * so well-behaved applications will just
346 * fallback to doing them in software.
347 */
348 *(int *)data = 0;
349 } else
350 error = crypto_getfeat((int *)data);
351 break;
352 case CIOCFINDDEV:
353 error = cryptodev_find((struct crypt_find_op *)data);
354 break;
355 default:
356 error = EINVAL;
357 break;
358 }
359 return (error);
360 #undef SES2
361 }
362
363 static int cryptodev_cb(void *);
364
365
366 static int
367 cryptodev_op(struct csession *cse, struct crypt_op *cop,
368 struct ucred *active_cred)
369 {
370 struct cryptop *crp = NULL;
371 struct cryptodesc *crde = NULL, *crda = NULL;
372 int error;
373
374 if (cop->len > 256*1024-4)
375 return (E2BIG);
376
377 if (cse->txform) {
378 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
379 return (EINVAL);
380 }
381
382 bzero(&cse->uio, sizeof(cse->uio));
383 cse->uio.uio_iov = &cse->iovec;
384 cse->uio.uio_iovcnt = 1;
385 cse->uio.uio_offset = 0;
386 cse->uio.uio_resid = cop->len;
387 cse->uio.uio_segflg = UIO_SYSSPACE;
388 cse->uio.uio_rw = UIO_WRITE;
389 /* XXX: not sure, was td, now curthread? */
390 cse->uio.uio_td = curthread;
391 cse->uio.uio_iov[0].iov_len = cop->len;
392 if (cse->thash) {
393 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
394 cse->uio.uio_resid += cse->thash->hashsize;
395 }
396 cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len,
397 M_XDATA, M_WAITOK);
398
399 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
400 if (crp == NULL) {
401 error = ENOMEM;
402 goto bail;
403 }
404
405 if (cse->thash) {
406 crda = crp->crp_desc;
407 if (cse->txform)
408 crde = crda->crd_next;
409 } else {
410 if (cse->txform)
411 crde = crp->crp_desc;
412 else {
413 error = EINVAL;
414 goto bail;
415 }
416 }
417
418 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
419 goto bail;
420
421 if (crda) {
422 crda->crd_skip = 0;
423 crda->crd_len = cop->len;
424 crda->crd_inject = cop->len;
425
426 crda->crd_alg = cse->mac;
427 crda->crd_key = cse->mackey;
428 crda->crd_klen = cse->mackeylen * 8;
429 }
430
431 if (crde) {
432 if (cop->op == COP_ENCRYPT)
433 crde->crd_flags |= CRD_F_ENCRYPT;
434 else
435 crde->crd_flags &= ~CRD_F_ENCRYPT;
436 crde->crd_len = cop->len;
437 crde->crd_inject = 0;
438
439 crde->crd_alg = cse->cipher;
440 crde->crd_key = cse->key;
441 crde->crd_klen = cse->keylen * 8;
442 }
443
444 crp->crp_ilen = cop->len;
445 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
446 | (cop->flags & COP_F_BATCH);
447 crp->crp_buf = (caddr_t)&cse->uio;
448 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
449 crp->crp_sid = cse->sid;
450 crp->crp_opaque = (void *)cse;
451
452 if (cop->iv) {
453 if (crde == NULL) {
454 error = EINVAL;
455 goto bail;
456 }
457 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
458 error = EINVAL;
459 goto bail;
460 }
461 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
462 goto bail;
463 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
464 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
465 crde->crd_skip = 0;
466 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
467 crde->crd_skip = 0;
468 } else if (crde) {
469 crde->crd_flags |= CRD_F_IV_PRESENT;
470 crde->crd_skip = cse->txform->blocksize;
471 crde->crd_len -= cse->txform->blocksize;
472 }
473
474 if (cop->mac && crda == NULL) {
475 error = EINVAL;
476 goto bail;
477 }
478
479 again:
480 /*
481 * Let the dispatch run unlocked, then, interlock against the
482 * callback before checking if the operation completed and going
483 * to sleep. This insures drivers don't inherit our lock which
484 * results in a lock order reversal between crypto_dispatch forced
485 * entry and the crypto_done callback into us.
486 */
487 error = crypto_dispatch(crp);
488 lockmgr(&cse->lock, LK_EXCLUSIVE);
489 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
490 error = lksleep(crp, &cse->lock, 0, "crydev", 0);
491 lockmgr(&cse->lock, LK_RELEASE);
492
493 if (error != 0)
494 goto bail;
495
496 if (crp->crp_etype == EAGAIN) {
497 crp->crp_etype = 0;
498 crp->crp_flags &= ~CRYPTO_F_DONE;
499 goto again;
500 }
501
502 if (crp->crp_etype != 0) {
503 error = crp->crp_etype;
504 goto bail;
505 }
506
507 if (cse->error) {
508 error = cse->error;
509 goto bail;
510 }
511
512 if (cop->dst &&
513 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
514 goto bail;
515
516 if (cop->mac &&
517 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
518 cop->mac, cse->thash->hashsize)))
519 goto bail;
520
521 bail:
522 if (crp)
523 crypto_freereq(crp);
524 if (cse->uio.uio_iov[0].iov_base)
525 kfree(cse->uio.uio_iov[0].iov_base, M_XDATA);
526
527 return (error);
528 }
529
530 static int
531 cryptodev_cb(void *op)
532 {
533 struct cryptop *crp = (struct cryptop *) op;
534 struct csession *cse = (struct csession *)crp->crp_opaque;
535
536 lockmgr(&cse->lock, LK_EXCLUSIVE);
537 cse->error = crp->crp_etype;
538 wakeup_one(crp);
539 lockmgr(&cse->lock, LK_RELEASE);
540 return (0);
541 }
542
543 static int
544 cryptodevkey_cb(void *op)
545 {
546 struct cryptkop *krp = (struct cryptkop *) op;
547
548 wakeup_one(krp);
549 return (0);
550 }
551
552 static int
553 cryptodev_key(struct crypt_kop *kop)
554 {
555 struct cryptkop *krp = NULL;
556 int error = EINVAL;
557 int in, out, size, i;
558
559 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
560 return (EFBIG);
561 }
562
563 in = kop->crk_iparams;
564 out = kop->crk_oparams;
565 switch (kop->crk_op) {
566 case CRK_MOD_EXP:
567 if (in == 3 && out == 1)
568 break;
569 return (EINVAL);
570 case CRK_MOD_EXP_CRT:
571 if (in == 6 && out == 1)
572 break;
573 return (EINVAL);
574 case CRK_DSA_SIGN:
575 if (in == 5 && out == 2)
576 break;
577 return (EINVAL);
578 case CRK_DSA_VERIFY:
579 if (in == 7 && out == 0)
580 break;
581 return (EINVAL);
582 case CRK_DH_COMPUTE_KEY:
583 if (in == 3 && out == 1)
584 break;
585 return (EINVAL);
586 default:
587 return (EINVAL);
588 }
589
590 krp = (struct cryptkop *)kmalloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO);
591 krp->krp_op = kop->crk_op;
592 krp->krp_status = kop->crk_status;
593 krp->krp_iparams = kop->crk_iparams;
594 krp->krp_oparams = kop->crk_oparams;
595 krp->krp_crid = kop->crk_crid;
596 krp->krp_status = 0;
597 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
598
599 for (i = 0; i < CRK_MAXPARAM; i++) {
600 if (kop->crk_param[i].crp_nbits > 65536)
601 /* Limit is the same as in OpenBSD */
602 goto fail;
603 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
604 }
605 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
606 size = (krp->krp_param[i].crp_nbits + 7) / 8;
607 if (size == 0)
608 continue;
609 krp->krp_param[i].crp_p = kmalloc(size, M_XDATA, M_WAITOK);
610 if (i >= krp->krp_iparams)
611 continue;
612 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
613 if (error)
614 goto fail;
615 }
616
617 error = crypto_kdispatch(krp);
618 if (error)
619 goto fail;
620 error = tsleep(krp, 0, "crydev", 0);
621 if (error) {
622 /* XXX can this happen? if so, how do we recover? */
623 goto fail;
624 }
625
626 kop->crk_crid = krp->krp_crid; /* device that did the work */
627 if (krp->krp_status != 0) {
628 error = krp->krp_status;
629 goto fail;
630 }
631
632 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
633 size = (krp->krp_param[i].crp_nbits + 7) / 8;
634 if (size == 0)
635 continue;
636 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
637 if (error)
638 goto fail;
639 }
640
641 fail:
642 if (krp) {
643 kop->crk_status = krp->krp_status;
644 for (i = 0; i < CRK_MAXPARAM; i++) {
645 if (krp->krp_param[i].crp_p)
646 kfree(krp->krp_param[i].crp_p, M_XDATA);
647 }
648 kfree(krp, M_XDATA);
649 }
650 return (error);
651 }
652
653 static int
654 cryptodev_find(struct crypt_find_op *find)
655 {
656 device_t dev;
657
658 if (find->crid != -1) {
659 dev = crypto_find_device_byhid(find->crid);
660 if (dev == NULL)
661 return (ENOENT);
662 strlcpy(find->name, device_get_nameunit(dev),
663 sizeof(find->name));
664 } else {
665 find->crid = crypto_find_driver(find->name);
666 if (find->crid == -1)
667 return (ENOENT);
668 }
669 return (0);
670 }
671
672 /*
673 * MPSAFE
674 */
675 static int
676 cryptof_poll(struct file *fp, int events, struct ucred *active_cred)
677 {
678 return (0);
679 }
680
681 /*
682 * MPSAFE
683 */
684 static int
685 cryptof_kqfilter(struct file *fp, struct knote *kn)
686 {
687
688 return (0);
689 }
690
691 /*
692 * MPSAFE
693 */
694 static int
695 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred)
696 {
697 return (EOPNOTSUPP);
698 }
699
700 /*
701 * MPALMOSTSAFE - acquires mplock
702 */
703 static int
704 cryptof_close(struct file *fp)
705 {
706 struct fcrypt *fcr = fp->f_data;
707 struct csession *cse;
708
709 get_mplock();
710 fcr = (struct fcrypt *)fp->f_data;
711 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
712 TAILQ_REMOVE(&fcr->csessions, cse, next);
713 (void)csefree(cse);
714 }
715 fp->f_data = NULL;
716 rel_mplock();
717
718 kfree(fcr, M_XDATA);
719 return (0);
720 }
721
722 static struct csession *
723 csefind(struct fcrypt *fcr, u_int ses)
724 {
725 struct csession *cse;
726
727 TAILQ_FOREACH(cse, &fcr->csessions, next)
728 if (cse->ses == ses)
729 return (cse);
730 return (NULL);
731 }
732
733 static int
734 csedelete(struct fcrypt *fcr, struct csession *cse_del)
735 {
736 struct csession *cse;
737
738 TAILQ_FOREACH(cse, &fcr->csessions, next) {
739 if (cse == cse_del) {
740 TAILQ_REMOVE(&fcr->csessions, cse, next);
741 return (1);
742 }
743 }
744 return (0);
745 }
746
747 static struct csession *
748 cseadd(struct fcrypt *fcr, struct csession *cse)
749 {
750 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
751 cse->ses = fcr->sesn++;
752 return (cse);
753 }
754
755 struct csession *
756 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
757 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
758 struct enc_xform *txform, struct auth_hash *thash)
759 {
760 struct csession *cse;
761
762 cse = kmalloc(sizeof(struct csession), M_XDATA, M_NOWAIT);
763 if (cse == NULL)
764 return NULL;
765 lockinit(&cse->lock, "cryptodev", 0, LK_CANRECURSE);
766 cse->key = key;
767 cse->keylen = keylen/8;
768 cse->mackey = mackey;
769 cse->mackeylen = mackeylen/8;
770 cse->sid = sid;
771 cse->cipher = cipher;
772 cse->mac = mac;
773 cse->txform = txform;
774 cse->thash = thash;
775 cseadd(fcr, cse);
776 return (cse);
777 }
778
779 static int
780 csefree(struct csession *cse)
781 {
782 int error;
783
784 error = crypto_freesession(cse->sid);
785 lockuninit(&cse->lock);
786 if (cse->key)
787 kfree(cse->key, M_XDATA);
788 if (cse->mackey)
789 kfree(cse->mackey, M_XDATA);
790 kfree(cse, M_XDATA);
791 return (error);
792 }
793
794 static int
795 cryptoopen(struct dev_open_args *ap)
796 {
797 return (0);
798 }
799
800 static int
801 cryptoread(struct dev_read_args *ap)
802 {
803 return (EIO);
804 }
805
806 static int
807 cryptowrite(struct dev_write_args *ap)
808 {
809 return (EIO);
810 }
811
812 static int
813 cryptoioctl(struct dev_ioctl_args *ap)
814 {
815 struct thread *td = curthread;
816 struct file *f;
817 struct fcrypt *fcr;
818 int fd, error;
819
820 switch (ap->a_cmd) {
821 case CRIOGET:
822 fcr = kmalloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
823 TAILQ_INIT(&fcr->csessions);
824 fcr->sesn = 0;
825
826 KKASSERT(td->td_lwp);
827 error = falloc(td->td_lwp, &f, &fd);
828
829 if (error) {
830 kfree(fcr, M_XDATA);
831 return (error);
832 }
833 /* falloc automatically provides an extra reference to 'f'. */
834 f->f_flag = FREAD | FWRITE;
835 f->f_type = DTYPE_CRYPTO;
836 f->f_ops = &cryptofops;
837 f->f_data = fcr;
838 fsetfd(td->td_proc->p_fd, f, fd);
839 *(u_int32_t *)ap->a_data = fd;
840 fdrop(f);
841
842 break;
843 case CRIOFINDDEV:
844 error = cryptodev_find((struct crypt_find_op *)ap->a_data);
845 break;
846 case CRIOASYMFEAT:
847 error = crypto_getfeat((int *)ap->a_data);
848 break;
849 default:
850 error = EINVAL;
851 break;
852 }
853 return (error);
854 }
855
856 static struct dev_ops crypto_ops = {
857 { "crypto", 0, 0 },
858 .d_open = cryptoopen,
859 .d_read = cryptoread,
860 .d_write = cryptowrite,
861 .d_ioctl = cryptoioctl,
862 };
863
864 /*
865 * Initialization code, both for static and dynamic loading.
866 */
867 static int
868 cryptodev_modevent(module_t mod, int type, void *unused)
869 {
870 switch (type) {
871 case MOD_LOAD:
872 if (bootverbose)
873 kprintf("crypto: <crypto device>\n");
874 make_dev(&crypto_ops, 0, UID_ROOT, GID_WHEEL,
875 0666, "crypto");
876 return 0;
877 case MOD_UNLOAD:
878 /*XXX disallow if active sessions */
879 //dev_ops_remove(&crypto_ops, 0, 0);
880 dev_ops_remove_all(&crypto_ops);
881 return 0;
882 }
883 return EINVAL;
884 }
885
886 static moduledata_t cryptodev_mod = {
887 "cryptodev",
888 cryptodev_modevent,
889 0
890 };
891 MODULE_VERSION(cryptodev, 1);
892 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
893 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
894 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
DragonFly BSD