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kernel - cleanup vfs_cache debugging
[dragonfly.git] / sys / opencrypto / cryptodev.c
blobceb6c67957fcaa9057ddf88deedd60a0343de86c
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_kqfilter(struct file *, struct knote *);
94 static int cryptof_stat(struct file *, struct stat *, struct ucred *);
95 static int cryptof_close(struct file *);
96
97 static struct fileops cryptofops = {
98 .fo_read = cryptof_rw,
99 .fo_write = cryptof_rw,
100 .fo_ioctl = cryptof_ioctl,
101 .fo_kqfilter = cryptof_kqfilter,
102 .fo_stat = cryptof_stat,
103 .fo_close = cryptof_close,
104 .fo_shutdown = nofo_shutdown
105 };
106
107 static struct csession *csefind(struct fcrypt *, u_int);
108 static int csedelete(struct fcrypt *, struct csession *);
109 static struct csession *cseadd(struct fcrypt *, struct csession *);
110 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
111 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
112 struct auth_hash *);
113 static int csefree(struct csession *);
114
115 static int cryptodev_op(struct csession *, struct crypt_op *, struct ucred *);
116 static int cryptodev_key(struct crypt_kop *);
117 static int cryptodev_find(struct crypt_find_op *);
118
119 static int
120 cryptof_rw(
121 struct file *fp,
122 struct uio *uio,
123 struct ucred *active_cred,
124 int flags)
125 {
126 return (EIO);
127 }
128
129 /*
130 * Check a crypto identifier to see if it requested
131 * a software device/driver. This can be done either
132 * by device name/class or through search constraints.
133 */
134 static int
135 checkforsoftware(int crid)
136 {
137 if (crid & CRYPTOCAP_F_SOFTWARE)
138 return EINVAL; /* XXX */
139 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
140 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
141 return EINVAL; /* XXX */
142 return 0;
143 }
144
145 /* ARGSUSED */
146 static int
147 cryptof_ioctl(struct file *fp, u_long cmd, caddr_t data,
148 struct ucred *cred, struct sysmsg *msg)
149 {
150 #define SES2(p) ((struct session2_op *)p)
151 struct cryptoini cria, crie;
152 struct fcrypt *fcr = fp->f_data;
153 struct csession *cse;
154 struct session_op *sop;
155 struct crypt_op *cop;
156 struct enc_xform *txform = NULL;
157 struct auth_hash *thash = NULL;
158 struct crypt_kop *kop;
159 u_int64_t sid;
160 u_int32_t ses;
161 int error = 0, crid;
162
163 switch (cmd) {
164 case CIOCGSESSION:
165 case CIOCGSESSION2:
166 sop = (struct session_op *)data;
167 switch (sop->cipher) {
168 case 0:
169 break;
170 case CRYPTO_DES_CBC:
171 txform = &enc_xform_des;
172 break;
173 case CRYPTO_3DES_CBC:
174 txform = &enc_xform_3des;
175 break;
176 case CRYPTO_BLF_CBC:
177 txform = &enc_xform_blf;
178 break;
179 case CRYPTO_CAST_CBC:
180 txform = &enc_xform_cast5;
181 break;
182 case CRYPTO_SKIPJACK_CBC:
183 txform = &enc_xform_skipjack;
184 break;
185 case CRYPTO_AES_CBC:
186 txform = &enc_xform_rijndael128;
187 break;
188 case CRYPTO_AES_XTS:
189 txform = &enc_xform_aes_xts;
190 break;
191 case CRYPTO_AES_CTR:
192 txform = &enc_xform_aes_ctr;
193 break;
194 case CRYPTO_NULL_CBC:
195 txform = &enc_xform_null;
196 break;
197 case CRYPTO_ARC4:
198 txform = &enc_xform_arc4;
199 break;
200 case CRYPTO_CAMELLIA_CBC:
201 txform = &enc_xform_camellia;
202 break;
203 case CRYPTO_TWOFISH_CBC:
204 txform = &enc_xform_twofish;
205 break;
206 case CRYPTO_SERPENT_CBC:
207 txform = &enc_xform_serpent;
208 break;
209 case CRYPTO_TWOFISH_XTS:
210 txform = &enc_xform_twofish_xts;
211 break;
212 case CRYPTO_SERPENT_XTS:
213 txform = &enc_xform_serpent_xts;
214 break;
215 default:
216 return (EINVAL);
217 }
218
219 switch (sop->mac) {
220 case 0:
221 break;
222 case CRYPTO_MD5_HMAC:
223 thash = &auth_hash_hmac_md5;
224 break;
225 case CRYPTO_SHA1_HMAC:
226 thash = &auth_hash_hmac_sha1;
227 break;
228 case CRYPTO_SHA2_256_HMAC:
229 thash = &auth_hash_hmac_sha2_256;
230 break;
231 case CRYPTO_SHA2_384_HMAC:
232 thash = &auth_hash_hmac_sha2_384;
233 break;
234 case CRYPTO_SHA2_512_HMAC:
235 thash = &auth_hash_hmac_sha2_512;
236 break;
237 case CRYPTO_RIPEMD160_HMAC:
238 thash = &auth_hash_hmac_ripemd_160;
239 break;
240 #ifdef notdef
241 case CRYPTO_MD5:
242 thash = &auth_hash_md5;
243 break;
244 case CRYPTO_SHA1:
245 thash = &auth_hash_sha1;
246 break;
247 #endif
248 case CRYPTO_NULL_HMAC:
249 thash = &auth_hash_null;
250 break;
251 default:
252 return (EINVAL);
253 }
254
255 bzero(&crie, sizeof(crie));
256 bzero(&cria, sizeof(cria));
257
258 if (txform) {
259 crie.cri_alg = txform->type;
260 crie.cri_klen = sop->keylen * 8;
261 if (sop->keylen > txform->maxkey ||
262 sop->keylen < txform->minkey) {
263 error = EINVAL;
264 goto bail;
265 }
266
267 crie.cri_key = kmalloc(crie.cri_klen / 8,
268 M_XDATA, M_WAITOK);
269 if ((error = copyin(sop->key, crie.cri_key,
270 crie.cri_klen / 8)))
271 goto bail;
272 if (thash)
273 crie.cri_next = &cria;
274 }
275
276 if (thash) {
277 cria.cri_alg = thash->type;
278 cria.cri_klen = sop->mackeylen * 8;
279 if (sop->mackeylen != thash->keysize) {
280 error = EINVAL;
281 goto bail;
282 }
283
284 if (cria.cri_klen) {
285 cria.cri_key = kmalloc(cria.cri_klen / 8,
286 M_XDATA, M_WAITOK);
287 if ((error = copyin(sop->mackey, cria.cri_key,
288 cria.cri_klen / 8)))
289 goto bail;
290 }
291 }
292
293 /* NB: CIOGSESSION2 has the crid */
294 if (cmd == CIOCGSESSION2) {
295 crid = SES2(sop)->crid;
296 error = checkforsoftware(crid);
297 if (error)
298 goto bail;
299 } else {
300 crid = CRYPTOCAP_F_HARDWARE;
301 if (crypto_devallowsoft)
302 crid |= CRYPTOCAP_F_SOFTWARE;
303 }
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 bzero(crie.cri_key, crie.cri_klen / 8);
326 kfree(crie.cri_key, M_XDATA);
327 }
328 if (cria.cri_key) {
329 bzero(cria.cri_key, cria.cri_klen / 8);
330 kfree(cria.cri_key, M_XDATA);
331 }
332 }
333 break;
334 case CIOCFSESSION:
335 ses = *(u_int32_t *)data;
336 cse = csefind(fcr, ses);
337 if (cse == NULL)
338 return (EINVAL);
339 csedelete(fcr, cse);
340 error = csefree(cse);
341 break;
342 case CIOCCRYPT:
343 cop = (struct crypt_op *)data;
344 cse = csefind(fcr, cop->ses);
345 if (cse == NULL)
346 return (EINVAL);
347 error = cryptodev_op(cse, cop, cred);
348 break;
349 case CIOCKEY:
350 case CIOCKEY2:
351 if (!crypto_userasymcrypto)
352 return (EPERM); /* XXX compat? */
353 get_mplock();
354 kop = (struct crypt_kop *)data;
355 if (cmd == CIOCKEY) {
356 /* NB: crypto core enforces s/w driver use */
357 kop->crk_crid =
358 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
359 }
360 error = cryptodev_key(kop);
361 rel_mplock();
362 break;
363 case CIOCASYMFEAT:
364 if (!crypto_userasymcrypto) {
365 /*
366 * NB: if user asym crypto operations are
367 * not permitted return "no algorithms"
368 * so well-behaved applications will just
369 * fallback to doing them in software.
370 */
371 *(int *)data = 0;
372 } else
373 error = crypto_getfeat((int *)data);
374 break;
375 case CIOCFINDDEV:
376 error = cryptodev_find((struct crypt_find_op *)data);
377 break;
378 default:
379 error = EINVAL;
380 break;
381 }
382 return (error);
383 #undef SES2
384 }
385
386 static int cryptodev_cb(void *);
387
388
389 static int
390 cryptodev_op(struct csession *cse, struct crypt_op *cop,
391 struct ucred *active_cred)
392 {
393 struct cryptop *crp = NULL;
394 struct cryptodesc *crde = NULL, *crda = NULL;
395 int error;
396
397 if (cop->len > 256*1024-4)
398 return (E2BIG);
399
400 if (cse->txform) {
401 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
402 return (EINVAL);
403 }
404
405 bzero(&cse->uio, sizeof(cse->uio));
406 cse->uio.uio_iov = &cse->iovec;
407 cse->uio.uio_iovcnt = 1;
408 cse->uio.uio_offset = 0;
409 cse->uio.uio_resid = cop->len;
410 cse->uio.uio_segflg = UIO_SYSSPACE;
411 cse->uio.uio_rw = UIO_WRITE;
412 /* XXX: not sure, was td, now curthread? */
413 cse->uio.uio_td = curthread;
414 cse->uio.uio_iov[0].iov_len = cop->len;
415 if (cse->thash) {
416 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
417 cse->uio.uio_resid += cse->thash->hashsize;
418 }
419 cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len,
420 M_XDATA, M_WAITOK);
421
422 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
423 if (crp == NULL) {
424 error = ENOMEM;
425 goto bail;
426 }
427
428 if (cse->thash) {
429 crda = crp->crp_desc;
430 if (cse->txform)
431 crde = crda->crd_next;
432 } else {
433 if (cse->txform)
434 crde = crp->crp_desc;
435 else {
436 error = EINVAL;
437 goto bail;
438 }
439 }
440
441 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
442 goto bail;
443
444 if (crda) {
445 crda->crd_skip = 0;
446 crda->crd_len = cop->len;
447 crda->crd_inject = cop->len;
448
449 crda->crd_alg = cse->mac;
450 crda->crd_key = cse->mackey;
451 crda->crd_klen = cse->mackeylen * 8;
452 }
453
454 if (crde) {
455 if (cop->op == COP_ENCRYPT)
456 crde->crd_flags |= CRD_F_ENCRYPT;
457 else
458 crde->crd_flags &= ~CRD_F_ENCRYPT;
459 crde->crd_len = cop->len;
460 crde->crd_inject = 0;
461
462 crde->crd_alg = cse->cipher;
463 crde->crd_key = cse->key;
464 crde->crd_klen = cse->keylen * 8;
465 }
466
467 crp->crp_ilen = cop->len;
468 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
469 | (cop->flags & COP_F_BATCH);
470 crp->crp_buf = (caddr_t)&cse->uio;
471 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
472 crp->crp_sid = cse->sid;
473 crp->crp_opaque = (void *)cse;
474
475 if (cop->iv) {
476 if (crde == NULL) {
477 error = EINVAL;
478 goto bail;
479 }
480 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
481 error = EINVAL;
482 goto bail;
483 }
484 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
485 goto bail;
486 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
487 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
488 crde->crd_skip = 0;
489 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
490 crde->crd_skip = 0;
491 } else if (crde) {
492 crde->crd_flags |= CRD_F_IV_PRESENT;
493 crde->crd_skip = cse->txform->blocksize;
494 crde->crd_len -= cse->txform->blocksize;
495 }
496
497 if (cop->mac && crda == NULL) {
498 error = EINVAL;
499 goto bail;
500 }
501
502 again:
503 /*
504 * Let the dispatch run unlocked, then, interlock against the
505 * callback before checking if the operation completed and going
506 * to sleep. This insures drivers don't inherit our lock which
507 * results in a lock order reversal between crypto_dispatch forced
508 * entry and the crypto_done callback into us.
509 */
510 error = crypto_dispatch(crp);
511 lockmgr(&cse->lock, LK_EXCLUSIVE);
512 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
513 error = lksleep(crp, &cse->lock, 0, "crydev", 0);
514 lockmgr(&cse->lock, LK_RELEASE);
515
516 if (error != 0)
517 goto bail;
518
519 if (crp->crp_etype == EAGAIN) {
520 crp->crp_etype = 0;
521 crp->crp_flags &= ~CRYPTO_F_DONE;
522 goto again;
523 }
524
525 if (crp->crp_etype != 0) {
526 error = crp->crp_etype;
527 goto bail;
528 }
529
530 if (cse->error) {
531 error = cse->error;
532 goto bail;
533 }
534
535 if (cop->dst &&
536 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
537 goto bail;
538
539 if (cop->mac &&
540 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
541 cop->mac, cse->thash->hashsize)))
542 goto bail;
543
544 bail:
545 if (crp)
546 crypto_freereq(crp);
547 if (cse->uio.uio_iov[0].iov_base)
548 kfree(cse->uio.uio_iov[0].iov_base, M_XDATA);
549
550 return (error);
551 }
552
553 static int
554 cryptodev_cb(void *op)
555 {
556 struct cryptop *crp = (struct cryptop *) op;
557 struct csession *cse = (struct csession *)crp->crp_opaque;
558
559 lockmgr(&cse->lock, LK_EXCLUSIVE);
560 cse->error = crp->crp_etype;
561 wakeup_one(crp);
562 lockmgr(&cse->lock, LK_RELEASE);
563 return (0);
564 }
565
566 static int
567 cryptodevkey_cb(void *op)
568 {
569 struct cryptkop *krp = (struct cryptkop *) op;
570
571 wakeup_one(krp);
572 return (0);
573 }
574
575 static int
576 cryptodev_key(struct crypt_kop *kop)
577 {
578 struct cryptkop *krp = NULL;
579 int error = EINVAL;
580 int in, out, size, i;
581
582 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
583 return (EFBIG);
584 }
585
586 in = kop->crk_iparams;
587 out = kop->crk_oparams;
588 switch (kop->crk_op) {
589 case CRK_MOD_EXP:
590 if (in == 3 && out == 1)
591 break;
592 return (EINVAL);
593 case CRK_MOD_EXP_CRT:
594 if (in == 6 && out == 1)
595 break;
596 return (EINVAL);
597 case CRK_DSA_SIGN:
598 if (in == 5 && out == 2)
599 break;
600 return (EINVAL);
601 case CRK_DSA_VERIFY:
602 if (in == 7 && out == 0)
603 break;
604 return (EINVAL);
605 case CRK_DH_COMPUTE_KEY:
606 if (in == 3 && out == 1)
607 break;
608 return (EINVAL);
609 default:
610 return (EINVAL);
611 }
612
613 krp = (struct cryptkop *)kmalloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO);
614 krp->krp_op = kop->crk_op;
615 krp->krp_status = kop->crk_status;
616 krp->krp_iparams = kop->crk_iparams;
617 krp->krp_oparams = kop->crk_oparams;
618 krp->krp_crid = kop->crk_crid;
619 krp->krp_status = 0;
620 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
621
622 for (i = 0; i < CRK_MAXPARAM; i++) {
623 if (kop->crk_param[i].crp_nbits > 65536)
624 /* Limit is the same as in OpenBSD */
625 goto fail;
626 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
627 }
628 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
629 size = (krp->krp_param[i].crp_nbits + 7) / 8;
630 if (size == 0)
631 continue;
632 krp->krp_param[i].crp_p = kmalloc(size, M_XDATA, M_WAITOK);
633 if (i >= krp->krp_iparams)
634 continue;
635 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
636 if (error)
637 goto fail;
638 }
639
640 error = crypto_kdispatch(krp);
641 if (error)
642 goto fail;
643 error = tsleep(krp, 0, "crydev", 0);
644 if (error) {
645 /* XXX can this happen? if so, how do we recover? */
646 goto fail;
647 }
648
649 kop->crk_crid = krp->krp_crid; /* device that did the work */
650 if (krp->krp_status != 0) {
651 error = krp->krp_status;
652 goto fail;
653 }
654
655 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
656 size = (krp->krp_param[i].crp_nbits + 7) / 8;
657 if (size == 0)
658 continue;
659 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
660 if (error)
661 goto fail;
662 }
663
664 fail:
665 if (krp) {
666 kop->crk_status = krp->krp_status;
667 for (i = 0; i < CRK_MAXPARAM; i++) {
668 if (krp->krp_param[i].crp_p) {
669 bzero(krp->krp_param[i].crp_p,
670 (krp->krp_param[i].crp_nbits + 7) / 8);
671 kfree(krp->krp_param[i].crp_p, M_XDATA);
672 }
673 }
674 kfree(krp, M_XDATA);
675 }
676 return (error);
677 }
678
679 static int
680 cryptodev_find(struct crypt_find_op *find)
681 {
682 device_t dev;
683
684 if (find->crid != -1) {
685 dev = crypto_find_device_byhid(find->crid);
686 if (dev == NULL)
687 return (ENOENT);
688 strlcpy(find->name, device_get_nameunit(dev),
689 sizeof(find->name));
690 } else {
691 find->crid = crypto_find_driver(find->name);
692 if (find->crid == -1)
693 return (ENOENT);
694 }
695 return (0);
696 }
697
698 /*
699 * MPSAFE
700 */
701 static int
702 cryptof_kqfilter(struct file *fp, struct knote *kn)
703 {
704
705 return (0);
706 }
707
708 /*
709 * MPSAFE
710 */
711 static int
712 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred)
713 {
714 return (EOPNOTSUPP);
715 }
716
717 /*
718 * MPALMOSTSAFE - acquires mplock
719 */
720 static int
721 cryptof_close(struct file *fp)
722 {
723 struct fcrypt *fcr = fp->f_data;
724 struct csession *cse;
725
726 get_mplock();
727 fcr = (struct fcrypt *)fp->f_data;
728 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
729 TAILQ_REMOVE(&fcr->csessions, cse, next);
730 (void)csefree(cse);
731 }
732 fp->f_data = NULL;
733 rel_mplock();
734
735 kfree(fcr, M_XDATA);
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 cse = kmalloc(sizeof(struct csession), M_XDATA, M_WAITOK | M_ZERO);
780 lockinit(&cse->lock, "cryptodev", 0, LK_CANRECURSE);
781 cse->key = key;
782 cse->keylen = keylen/8;
783 cse->mackey = mackey;
784 cse->mackeylen = mackeylen/8;
785 cse->sid = sid;
786 cse->cipher = cipher;
787 cse->mac = mac;
788 cse->txform = txform;
789 cse->thash = thash;
790 cseadd(fcr, cse);
791 return (cse);
792 }
793
794 static int
795 csefree(struct csession *cse)
796 {
797 int error;
798
799 error = crypto_freesession(cse->sid);
800 lockuninit(&cse->lock);
801 if (cse->key)
802 kfree(cse->key, M_XDATA);
803 if (cse->mackey)
804 kfree(cse->mackey, M_XDATA);
805 kfree(cse, M_XDATA);
806 return (error);
807 }
808
809 static int
810 cryptoopen(struct dev_open_args *ap)
811 {
812 return (0);
813 }
814
815 static int
816 cryptoread(struct dev_read_args *ap)
817 {
818 return (EIO);
819 }
820
821 static int
822 cryptowrite(struct dev_write_args *ap)
823 {
824 return (EIO);
825 }
826
827 static int
828 cryptoioctl(struct dev_ioctl_args *ap)
829 {
830 struct thread *td = curthread;
831 struct file *f;
832 struct fcrypt *fcr;
833 int fd, error;
834
835 switch (ap->a_cmd) {
836 case CRIOGET:
837 fcr = kmalloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
838 TAILQ_INIT(&fcr->csessions);
839 fcr->sesn = 0;
840
841 KKASSERT(td->td_lwp);
842 error = falloc(td->td_lwp, &f, &fd);
843
844 if (error) {
845 kfree(fcr, M_XDATA);
846 return (error);
847 }
848 /* falloc automatically provides an extra reference to 'f'. */
849 f->f_flag = FREAD | FWRITE;
850 f->f_type = DTYPE_CRYPTO;
851 f->f_ops = &cryptofops;
852 f->f_data = fcr;
853 fsetfd(td->td_proc->p_fd, f, fd);
854 *(u_int32_t *)ap->a_data = fd;
855 fdrop(f);
856
857 break;
858 case CRIOFINDDEV:
859 error = cryptodev_find((struct crypt_find_op *)ap->a_data);
860 break;
861 case CRIOASYMFEAT:
862 error = crypto_getfeat((int *)ap->a_data);
863 break;
864 default:
865 error = EINVAL;
866 break;
867 }
868 return (error);
869 }
870
871 static struct dev_ops crypto_ops = {
872 { "crypto", 0, D_MPSAFE },
873 .d_open = cryptoopen,
874 .d_read = cryptoread,
875 .d_write = cryptowrite,
876 .d_ioctl = cryptoioctl,
877 };
878
879 /*
880 * Initialization code, both for static and dynamic loading.
881 */
882 static int
883 cryptodev_modevent(module_t mod, int type, void *unused)
884 {
885 switch (type) {
886 case MOD_LOAD:
887 if (bootverbose)
888 kprintf("crypto: <crypto device>\n");
889 make_dev(&crypto_ops, 0, UID_ROOT, GID_WHEEL,
890 0666, "crypto");
891 return 0;
892 case MOD_UNLOAD:
893 /*XXX disallow if active sessions */
894 //dev_ops_remove(&crypto_ops, 0, 0);
895 dev_ops_remove_all(&crypto_ops);
896 return 0;
897 }
898 return EINVAL;
899 }
900
901 static moduledata_t cryptodev_mod = {
902 "cryptodev",
903 cryptodev_modevent,
904 0
905 };
906 MODULE_VERSION(cryptodev, 1);
907 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
908 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
DragonFly BSD