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Sync acpiconf with FreeBSD 7.2.
[dragonfly.git] / sys / opencrypto / cryptodev.c
blobb3c7d24280fe27147ff625e7c09f43b318bd6185
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 #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 struct lock lock;
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);
89 static int cryptof_ioctl(struct file *, u_long, caddr_t,
90 struct ucred *, struct sysmsg *);
91 static int cryptof_poll(struct file *, int, struct ucred *);
92 static int cryptof_kqfilter(struct file *, struct knote *);
93 static int cryptof_stat(struct file *, struct stat *, struct ucred *);
94 static int cryptof_close(struct file *);
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 .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_NULL_CBC:
189 txform = &enc_xform_null;
190 break;
191 case CRYPTO_ARC4:
192 txform = &enc_xform_arc4;
193 break;
194 case CRYPTO_CAMELLIA_CBC:
195 txform = &enc_xform_camellia;
196 break;
197 default:
198 return (EINVAL);
199 }
200
201 switch (sop->mac) {
202 case 0:
203 break;
204 case CRYPTO_MD5_HMAC:
205 thash = &auth_hash_hmac_md5;
206 break;
207 case CRYPTO_SHA1_HMAC:
208 thash = &auth_hash_hmac_sha1;
209 break;
210 case CRYPTO_SHA2_256_HMAC:
211 thash = &auth_hash_hmac_sha2_256;
212 break;
213 case CRYPTO_SHA2_384_HMAC:
214 thash = &auth_hash_hmac_sha2_384;
215 break;
216 case CRYPTO_SHA2_512_HMAC:
217 thash = &auth_hash_hmac_sha2_512;
218 break;
219 case CRYPTO_RIPEMD160_HMAC:
220 thash = &auth_hash_hmac_ripemd_160;
221 break;
222 #ifdef notdef
223 case CRYPTO_MD5:
224 thash = &auth_hash_md5;
225 break;
226 case CRYPTO_SHA1:
227 thash = &auth_hash_sha1;
228 break;
229 #endif
230 case CRYPTO_NULL_HMAC:
231 thash = &auth_hash_null;
232 break;
233 default:
234 return (EINVAL);
235 }
236
237 bzero(&crie, sizeof(crie));
238 bzero(&cria, sizeof(cria));
239
240 if (txform) {
241 crie.cri_alg = txform->type;
242 crie.cri_klen = sop->keylen * 8;
243 if (sop->keylen > txform->maxkey ||
244 sop->keylen < txform->minkey) {
245 error = EINVAL;
246 goto bail;
247 }
248
249 crie.cri_key = kmalloc(crie.cri_klen / 8,
250 M_XDATA, M_WAITOK);
251 if ((error = copyin(sop->key, crie.cri_key,
252 crie.cri_klen / 8)))
253 goto bail;
254 if (thash)
255 crie.cri_next = &cria;
256 }
257
258 if (thash) {
259 cria.cri_alg = thash->type;
260 cria.cri_klen = sop->mackeylen * 8;
261 if (sop->mackeylen != thash->keysize) {
262 error = EINVAL;
263 goto bail;
264 }
265
266 if (cria.cri_klen) {
267 cria.cri_key = kmalloc(cria.cri_klen / 8,
268 M_XDATA, M_WAITOK);
269 if ((error = copyin(sop->mackey, cria.cri_key,
270 cria.cri_klen / 8)))
271 goto bail;
272 }
273 }
274
275 /* NB: CIOGSESSION2 has the crid */
276 if (cmd == CIOCGSESSION2) {
277 crid = SES2(sop)->crid;
278 error = checkforsoftware(crid);
279 if (error)
280 goto bail;
281 } else
282 crid = CRYPTOCAP_F_HARDWARE;
283 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
284 if (error)
285 goto bail;
286
287 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
288 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
289 thash);
290
291 if (cse == NULL) {
292 crypto_freesession(sid);
293 error = EINVAL;
294 goto bail;
295 }
296 sop->ses = cse->ses;
297 if (cmd == CIOCGSESSION2) {
298 /* return hardware/driver id */
299 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
300 }
301 bail:
302 if (error) {
303 if (crie.cri_key)
304 kfree(crie.cri_key, M_XDATA);
305 if (cria.cri_key)
306 kfree(cria.cri_key, M_XDATA);
307 }
308 break;
309 case CIOCFSESSION:
310 ses = *(u_int32_t *)data;
311 cse = csefind(fcr, ses);
312 if (cse == NULL)
313 return (EINVAL);
314 csedelete(fcr, cse);
315 error = csefree(cse);
316 break;
317 case CIOCCRYPT:
318 cop = (struct crypt_op *)data;
319 cse = csefind(fcr, cop->ses);
320 if (cse == NULL)
321 return (EINVAL);
322 error = cryptodev_op(cse, cop, cred);
323 break;
324 case CIOCKEY:
325 case CIOCKEY2:
326 if (!crypto_userasymcrypto)
327 return (EPERM); /* XXX compat? */
328 get_mplock();
329 kop = (struct crypt_kop *)data;
330 if (cmd == CIOCKEY) {
331 /* NB: crypto core enforces s/w driver use */
332 kop->crk_crid =
333 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
334 }
335 error = cryptodev_key(kop);
336 rel_mplock();
337 break;
338 case CIOCASYMFEAT:
339 if (!crypto_userasymcrypto) {
340 /*
341 * NB: if user asym crypto operations are
342 * not permitted return "no algorithms"
343 * so well-behaved applications will just
344 * fallback to doing them in software.
345 */
346 *(int *)data = 0;
347 } else
348 error = crypto_getfeat((int *)data);
349 break;
350 case CIOCFINDDEV:
351 error = cryptodev_find((struct crypt_find_op *)data);
352 break;
353 default:
354 error = EINVAL;
355 break;
356 }
357 return (error);
358 #undef SES2
359 }
360
361 static int cryptodev_cb(void *);
362
363
364 static int
365 cryptodev_op(struct csession *cse, struct crypt_op *cop,
366 struct ucred *active_cred)
367 {
368 struct cryptop *crp = NULL;
369 struct cryptodesc *crde = NULL, *crda = NULL;
370 int error;
371
372 if (cop->len > 256*1024-4)
373 return (E2BIG);
374
375 if (cse->txform) {
376 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
377 return (EINVAL);
378 }
379
380 bzero(&cse->uio, sizeof(cse->uio));
381 cse->uio.uio_iov = &cse->iovec;
382 cse->uio.uio_iovcnt = 1;
383 cse->uio.uio_offset = 0;
384 cse->uio.uio_resid = cop->len;
385 cse->uio.uio_segflg = UIO_SYSSPACE;
386 cse->uio.uio_rw = UIO_WRITE;
387 /* XXX: not sure, was td, now curthread? */
388 cse->uio.uio_td = curthread;
389 cse->uio.uio_iov[0].iov_len = cop->len;
390 if (cse->thash) {
391 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
392 cse->uio.uio_resid += cse->thash->hashsize;
393 }
394 cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len,
395 M_XDATA, M_WAITOK);
396
397 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
398 if (crp == NULL) {
399 error = ENOMEM;
400 goto bail;
401 }
402
403 if (cse->thash) {
404 crda = crp->crp_desc;
405 if (cse->txform)
406 crde = crda->crd_next;
407 } else {
408 if (cse->txform)
409 crde = crp->crp_desc;
410 else {
411 error = EINVAL;
412 goto bail;
413 }
414 }
415
416 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
417 goto bail;
418
419 if (crda) {
420 crda->crd_skip = 0;
421 crda->crd_len = cop->len;
422 crda->crd_inject = cop->len;
423
424 crda->crd_alg = cse->mac;
425 crda->crd_key = cse->mackey;
426 crda->crd_klen = cse->mackeylen * 8;
427 }
428
429 if (crde) {
430 if (cop->op == COP_ENCRYPT)
431 crde->crd_flags |= CRD_F_ENCRYPT;
432 else
433 crde->crd_flags &= ~CRD_F_ENCRYPT;
434 crde->crd_len = cop->len;
435 crde->crd_inject = 0;
436
437 crde->crd_alg = cse->cipher;
438 crde->crd_key = cse->key;
439 crde->crd_klen = cse->keylen * 8;
440 }
441
442 crp->crp_ilen = cop->len;
443 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
444 | (cop->flags & COP_F_BATCH);
445 crp->crp_buf = (caddr_t)&cse->uio;
446 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
447 crp->crp_sid = cse->sid;
448 crp->crp_opaque = (void *)cse;
449
450 if (cop->iv) {
451 if (crde == NULL) {
452 error = EINVAL;
453 goto bail;
454 }
455 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
456 error = EINVAL;
457 goto bail;
458 }
459 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
460 goto bail;
461 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
462 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
463 crde->crd_skip = 0;
464 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
465 crde->crd_skip = 0;
466 } else if (crde) {
467 crde->crd_flags |= CRD_F_IV_PRESENT;
468 crde->crd_skip = cse->txform->blocksize;
469 crde->crd_len -= cse->txform->blocksize;
470 }
471
472 if (cop->mac && crda == NULL) {
473 error = EINVAL;
474 goto bail;
475 }
476
477 again:
478 /*
479 * Let the dispatch run unlocked, then, interlock against the
480 * callback before checking if the operation completed and going
481 * to sleep. This insures drivers don't inherit our lock which
482 * results in a lock order reversal between crypto_dispatch forced
483 * entry and the crypto_done callback into us.
484 */
485 error = crypto_dispatch(crp);
486 lockmgr(&cse->lock, LK_EXCLUSIVE);
487 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
488 error = lksleep(crp, &cse->lock, 0, "crydev", 0);
489 lockmgr(&cse->lock, LK_RELEASE);
490
491 if (error != 0)
492 goto bail;
493
494 if (crp->crp_etype == EAGAIN) {
495 crp->crp_etype = 0;
496 crp->crp_flags &= ~CRYPTO_F_DONE;
497 goto again;
498 }
499
500 if (crp->crp_etype != 0) {
501 error = crp->crp_etype;
502 goto bail;
503 }
504
505 if (cse->error) {
506 error = cse->error;
507 goto bail;
508 }
509
510 if (cop->dst &&
511 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
512 goto bail;
513
514 if (cop->mac &&
515 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
516 cop->mac, cse->thash->hashsize)))
517 goto bail;
518
519 bail:
520 if (crp)
521 crypto_freereq(crp);
522 if (cse->uio.uio_iov[0].iov_base)
523 kfree(cse->uio.uio_iov[0].iov_base, M_XDATA);
524
525 return (error);
526 }
527
528 static int
529 cryptodev_cb(void *op)
530 {
531 struct cryptop *crp = (struct cryptop *) op;
532 struct csession *cse = (struct csession *)crp->crp_opaque;
533
534 lockmgr(&cse->lock, LK_EXCLUSIVE);
535 cse->error = crp->crp_etype;
536 wakeup_one(crp);
537 lockmgr(&cse->lock, LK_RELEASE);
538 return (0);
539 }
540
541 static int
542 cryptodevkey_cb(void *op)
543 {
544 struct cryptkop *krp = (struct cryptkop *) op;
545
546 wakeup_one(krp);
547 return (0);
548 }
549
550 static int
551 cryptodev_key(struct crypt_kop *kop)
552 {
553 struct cryptkop *krp = NULL;
554 int error = EINVAL;
555 int in, out, size, i;
556
557 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
558 return (EFBIG);
559 }
560
561 in = kop->crk_iparams;
562 out = kop->crk_oparams;
563 switch (kop->crk_op) {
564 case CRK_MOD_EXP:
565 if (in == 3 && out == 1)
566 break;
567 return (EINVAL);
568 case CRK_MOD_EXP_CRT:
569 if (in == 6 && out == 1)
570 break;
571 return (EINVAL);
572 case CRK_DSA_SIGN:
573 if (in == 5 && out == 2)
574 break;
575 return (EINVAL);
576 case CRK_DSA_VERIFY:
577 if (in == 7 && out == 0)
578 break;
579 return (EINVAL);
580 case CRK_DH_COMPUTE_KEY:
581 if (in == 3 && out == 1)
582 break;
583 return (EINVAL);
584 default:
585 return (EINVAL);
586 }
587
588 krp = (struct cryptkop *)kmalloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO);
589 krp->krp_op = kop->crk_op;
590 krp->krp_status = kop->crk_status;
591 krp->krp_iparams = kop->crk_iparams;
592 krp->krp_oparams = kop->crk_oparams;
593 krp->krp_crid = kop->crk_crid;
594 krp->krp_status = 0;
595 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
596
597 for (i = 0; i < CRK_MAXPARAM; i++) {
598 if (kop->crk_param[i].crp_nbits > 65536)
599 /* Limit is the same as in OpenBSD */
600 goto fail;
601 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
602 }
603 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
604 size = (krp->krp_param[i].crp_nbits + 7) / 8;
605 if (size == 0)
606 continue;
607 krp->krp_param[i].crp_p = kmalloc(size, M_XDATA, M_WAITOK);
608 if (i >= krp->krp_iparams)
609 continue;
610 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
611 if (error)
612 goto fail;
613 }
614
615 error = crypto_kdispatch(krp);
616 if (error)
617 goto fail;
618 error = tsleep(krp, 0, "crydev", 0);
619 if (error) {
620 /* XXX can this happen? if so, how do we recover? */
621 goto fail;
622 }
623
624 kop->crk_crid = krp->krp_crid; /* device that did the work */
625 if (krp->krp_status != 0) {
626 error = krp->krp_status;
627 goto fail;
628 }
629
630 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
631 size = (krp->krp_param[i].crp_nbits + 7) / 8;
632 if (size == 0)
633 continue;
634 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
635 if (error)
636 goto fail;
637 }
638
639 fail:
640 if (krp) {
641 kop->crk_status = krp->krp_status;
642 for (i = 0; i < CRK_MAXPARAM; i++) {
643 if (krp->krp_param[i].crp_p)
644 kfree(krp->krp_param[i].crp_p, M_XDATA);
645 }
646 kfree(krp, M_XDATA);
647 }
648 return (error);
649 }
650
651 static int
652 cryptodev_find(struct crypt_find_op *find)
653 {
654 device_t dev;
655
656 if (find->crid != -1) {
657 dev = crypto_find_device_byhid(find->crid);
658 if (dev == NULL)
659 return (ENOENT);
660 strlcpy(find->name, device_get_nameunit(dev),
661 sizeof(find->name));
662 } else {
663 find->crid = crypto_find_driver(find->name);
664 if (find->crid == -1)
665 return (ENOENT);
666 }
667 return (0);
668 }
669
670 /*
671 * MPSAFE
672 */
673 static int
674 cryptof_poll(struct file *fp, int events, struct ucred *active_cred)
675 {
676 return (0);
677 }
678
679 /*
680 * MPSAFE
681 */
682 static int
683 cryptof_kqfilter(struct file *fp, struct knote *kn)
684 {
685
686 return (0);
687 }
688
689 /*
690 * MPSAFE
691 */
692 static int
693 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred)
694 {
695 return (EOPNOTSUPP);
696 }
697
698 /*
699 * MPALMOSTSAFE - acquires mplock
700 */
701 static int
702 cryptof_close(struct file *fp)
703 {
704 struct fcrypt *fcr = fp->f_data;
705 struct csession *cse;
706
707 get_mplock();
708 fcr = (struct fcrypt *)fp->f_data;
709 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
710 TAILQ_REMOVE(&fcr->csessions, cse, next);
711 (void)csefree(cse);
712 }
713 fp->f_data = NULL;
714 rel_mplock();
715
716 kfree(fcr, M_XDATA);
717 return (0);
718 }
719
720 static struct csession *
721 csefind(struct fcrypt *fcr, u_int ses)
722 {
723 struct csession *cse;
724
725 TAILQ_FOREACH(cse, &fcr->csessions, next)
726 if (cse->ses == ses)
727 return (cse);
728 return (NULL);
729 }
730
731 static int
732 csedelete(struct fcrypt *fcr, struct csession *cse_del)
733 {
734 struct csession *cse;
735
736 TAILQ_FOREACH(cse, &fcr->csessions, next) {
737 if (cse == cse_del) {
738 TAILQ_REMOVE(&fcr->csessions, cse, next);
739 return (1);
740 }
741 }
742 return (0);
743 }
744
745 static struct csession *
746 cseadd(struct fcrypt *fcr, struct csession *cse)
747 {
748 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
749 cse->ses = fcr->sesn++;
750 return (cse);
751 }
752
753 struct csession *
754 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
755 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
756 struct enc_xform *txform, struct auth_hash *thash)
757 {
758 struct csession *cse;
759
760 cse = kmalloc(sizeof(struct csession), M_XDATA, M_NOWAIT);
761 if (cse == NULL)
762 return NULL;
763 lockinit(&cse->lock, "cryptodev", 0, LK_CANRECURSE);
764 cse->key = key;
765 cse->keylen = keylen/8;
766 cse->mackey = mackey;
767 cse->mackeylen = mackeylen/8;
768 cse->sid = sid;
769 cse->cipher = cipher;
770 cse->mac = mac;
771 cse->txform = txform;
772 cse->thash = thash;
773 cseadd(fcr, cse);
774 return (cse);
775 }
776
777 static int
778 csefree(struct csession *cse)
779 {
780 int error;
781
782 error = crypto_freesession(cse->sid);
783 lockuninit(&cse->lock);
784 if (cse->key)
785 kfree(cse->key, M_XDATA);
786 if (cse->mackey)
787 kfree(cse->mackey, M_XDATA);
788 kfree(cse, M_XDATA);
789 return (error);
790 }
791
792 static int
793 cryptoopen(struct dev_open_args *ap)
794 {
795 return (0);
796 }
797
798 static int
799 cryptoread(struct dev_read_args *ap)
800 {
801 return (EIO);
802 }
803
804 static int
805 cryptowrite(struct dev_write_args *ap)
806 {
807 return (EIO);
808 }
809
810 static int
811 cryptoioctl(struct dev_ioctl_args *ap)
812 {
813 struct file *f;
814 struct fcrypt *fcr;
815 int fd, error;
816
817 switch (ap->a_cmd) {
818 case CRIOGET:
819 fcr = kmalloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
820 TAILQ_INIT(&fcr->csessions);
821 fcr->sesn = 0;
822
823 KKASSERT(curproc);
824 error = falloc(curproc, &f, &fd);
825
826 if (error) {
827 kfree(fcr, M_XDATA);
828 return (error);
829 }
830 /* falloc automatically provides an extra reference to 'f'. */
831 f->f_flag = FREAD | FWRITE;
832 f->f_type = DTYPE_CRYPTO;
833 f->f_ops = &cryptofops;
834 f->f_data = fcr;
835 fsetfd(curproc, f, fd);
836 *(u_int32_t *)ap->a_data = fd;
837 fdrop(f);
838
839 break;
840 case CRIOFINDDEV:
841 error = cryptodev_find((struct crypt_find_op *)ap->a_data);
842 break;
843 case CRIOASYMFEAT:
844 error = crypto_getfeat((int *)ap->a_data);
845 break;
846 default:
847 error = EINVAL;
848 break;
849 }
850 return (error);
851 }
852
853 static struct dev_ops crypto_ops = {
854 { "crypto", 0, 0 },
855 .d_open = cryptoopen,
856 .d_read = cryptoread,
857 .d_write = cryptowrite,
858 .d_ioctl = cryptoioctl,
859 };
860
861 /*
862 * Initialization code, both for static and dynamic loading.
863 */
864 static int
865 cryptodev_modevent(module_t mod, int type, void *unused)
866 {
867 switch (type) {
868 case MOD_LOAD:
869 if (bootverbose)
870 kprintf("crypto: <crypto device>\n");
871 make_dev(&crypto_ops, 0, UID_ROOT, GID_WHEEL,
872 0666, "crypto");
873 return 0;
874 case MOD_UNLOAD:
875 /*XXX disallow if active sessions */
876 //dev_ops_remove(&crypto_ops, 0, 0);
877 dev_ops_remove_all(&crypto_ops);
878 return 0;
879 }
880 return EINVAL;
881 }
882
883 static moduledata_t cryptodev_mod = {
884 "cryptodev",
885 cryptodev_modevent,
886 0
887 };
888 MODULE_VERSION(cryptodev, 1);
889 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
890 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
891 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
DragonFly BSD