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: releng/10.1/sys/opencrypto/cryptodev.c 254356 2013-08-15 07:54:31Z glebius $");
37
38 #include "opt_compat.h"
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/malloc.h>
43 #include <sys/mbuf.h>
44 #include <sys/lock.h>
45 #include <sys/mutex.h>
46 #include <sys/sysctl.h>
47 #include <sys/file.h>
48 #include <sys/filedesc.h>
49 #include <sys/errno.h>
50 #include <sys/uio.h>
51 #include <sys/random.h>
52 #include <sys/conf.h>
53 #include <sys/kernel.h>
54 #include <sys/module.h>
55 #include <sys/fcntl.h>
56 #include <sys/bus.h>
57
58 #include <opencrypto/cryptodev.h>
59 #include <opencrypto/xform.h>
60
61 #ifdef COMPAT_FREEBSD32
62 #include <sys/mount.h>
63 #include <compat/freebsd32/freebsd32.h>
64
65 struct session_op32 {
66 u_int32_t cipher;
67 u_int32_t mac;
68 u_int32_t keylen;
69 u_int32_t key;
70 int mackeylen;
71 u_int32_t mackey;
72 u_int32_t ses;
73 };
74
75 struct session2_op32 {
76 u_int32_t cipher;
77 u_int32_t mac;
78 u_int32_t keylen;
79 u_int32_t key;
80 int mackeylen;
81 u_int32_t mackey;
82 u_int32_t ses;
83 int crid;
84 int pad[4];
85 };
86
87 struct crypt_op32 {
88 u_int32_t ses;
89 u_int16_t op;
90 u_int16_t flags;
91 u_int len;
92 u_int32_t src, dst;
93 u_int32_t mac;
94 u_int32_t iv;
95 };
96
97 struct crparam32 {
98 u_int32_t crp_p;
99 u_int crp_nbits;
100 };
101
102 struct crypt_kop32 {
103 u_int crk_op;
104 u_int crk_status;
105 u_short crk_iparams;
106 u_short crk_oparams;
107 u_int crk_crid;
108 struct crparam32 crk_param[CRK_MAXPARAM];
109 };
110
111 struct cryptotstat32 {
112 struct timespec32 acc;
113 struct timespec32 min;
114 struct timespec32 max;
115 u_int32_t count;
116 };
117
118 struct cryptostats32 {
119 u_int32_t cs_ops;
120 u_int32_t cs_errs;
121 u_int32_t cs_kops;
122 u_int32_t cs_kerrs;
123 u_int32_t cs_intrs;
124 u_int32_t cs_rets;
125 u_int32_t cs_blocks;
126 u_int32_t cs_kblocks;
127 struct cryptotstat32 cs_invoke;
128 struct cryptotstat32 cs_done;
129 struct cryptotstat32 cs_cb;
130 struct cryptotstat32 cs_finis;
131 };
132
133 #define CIOCGSESSION32 _IOWR('c', 101, struct session_op32)
134 #define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32)
135 #define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32)
136 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
137 #define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32)
138
139 static void
140 session_op_from_32(const struct session_op32 *from, struct session_op *to)
141 {
142
143 CP(*from, *to, cipher);
144 CP(*from, *to, mac);
145 CP(*from, *to, keylen);
146 PTRIN_CP(*from, *to, key);
147 CP(*from, *to, mackeylen);
148 PTRIN_CP(*from, *to, mackey);
149 CP(*from, *to, ses);
150 }
151
152 static void
153 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
154 {
155
156 session_op_from_32((const struct session_op32 *)from,
157 (struct session_op *)to);
158 CP(*from, *to, crid);
159 }
160
161 static void
162 session_op_to_32(const struct session_op *from, struct session_op32 *to)
163 {
164
165 CP(*from, *to, cipher);
166 CP(*from, *to, mac);
167 CP(*from, *to, keylen);
168 PTROUT_CP(*from, *to, key);
169 CP(*from, *to, mackeylen);
170 PTROUT_CP(*from, *to, mackey);
171 CP(*from, *to, ses);
172 }
173
174 static void
175 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
176 {
177
178 session_op_to_32((const struct session_op *)from,
179 (struct session_op32 *)to);
180 CP(*from, *to, crid);
181 }
182
183 static void
184 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
185 {
186
187 CP(*from, *to, ses);
188 CP(*from, *to, op);
189 CP(*from, *to, flags);
190 CP(*from, *to, len);
191 PTRIN_CP(*from, *to, src);
192 PTRIN_CP(*from, *to, dst);
193 PTRIN_CP(*from, *to, mac);
194 PTRIN_CP(*from, *to, iv);
195 }
196
197 static void
198 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
199 {
200
201 CP(*from, *to, ses);
202 CP(*from, *to, op);
203 CP(*from, *to, flags);
204 CP(*from, *to, len);
205 PTROUT_CP(*from, *to, src);
206 PTROUT_CP(*from, *to, dst);
207 PTROUT_CP(*from, *to, mac);
208 PTROUT_CP(*from, *to, iv);
209 }
210
211 static void
212 crparam_from_32(const struct crparam32 *from, struct crparam *to)
213 {
214
215 PTRIN_CP(*from, *to, crp_p);
216 CP(*from, *to, crp_nbits);
217 }
218
219 static void
220 crparam_to_32(const struct crparam *from, struct crparam32 *to)
221 {
222
223 PTROUT_CP(*from, *to, crp_p);
224 CP(*from, *to, crp_nbits);
225 }
226
227 static void
228 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
229 {
230 int i;
231
232 CP(*from, *to, crk_op);
233 CP(*from, *to, crk_status);
234 CP(*from, *to, crk_iparams);
235 CP(*from, *to, crk_oparams);
236 CP(*from, *to, crk_crid);
237 for (i = 0; i < CRK_MAXPARAM; i++)
238 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
239 }
240
241 static void
242 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
243 {
244 int i;
245
246 CP(*from, *to, crk_op);
247 CP(*from, *to, crk_status);
248 CP(*from, *to, crk_iparams);
249 CP(*from, *to, crk_oparams);
250 CP(*from, *to, crk_crid);
251 for (i = 0; i < CRK_MAXPARAM; i++)
252 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
253 }
254 #endif
255
256 struct csession {
257 TAILQ_ENTRY(csession) next;
258 u_int64_t sid;
259 u_int32_t ses;
260 struct mtx lock; /* for op submission */
261
262 u_int32_t cipher;
263 struct enc_xform *txform;
264 u_int32_t mac;
265 struct auth_hash *thash;
266
267 caddr_t key;
268 int keylen;
269 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
270
271 caddr_t mackey;
272 int mackeylen;
273
274 struct iovec iovec;
275 struct uio uio;
276 int error;
277 };
278
279 struct fcrypt {
280 TAILQ_HEAD(csessionlist, csession) csessions;
281 int sesn;
282 };
283
284 static int cryptof_rw(struct file *fp, struct uio *uio,
285 struct ucred *cred, int flags, struct thread *);
286 static int cryptof_truncate(struct file *, off_t, struct ucred *,
287 struct thread *);
288 static int cryptof_ioctl(struct file *, u_long, void *,
289 struct ucred *, struct thread *);
290 static int cryptof_poll(struct file *, int, struct ucred *, struct thread *);
291 static int cryptof_kqfilter(struct file *, struct knote *);
292 static int cryptof_stat(struct file *, struct stat *,
293 struct ucred *, struct thread *);
294 static int cryptof_close(struct file *, struct thread *);
295
296 static struct fileops cryptofops = {
297 .fo_read = cryptof_rw,
298 .fo_write = cryptof_rw,
299 .fo_truncate = cryptof_truncate,
300 .fo_ioctl = cryptof_ioctl,
301 .fo_poll = cryptof_poll,
302 .fo_kqfilter = cryptof_kqfilter,
303 .fo_stat = cryptof_stat,
304 .fo_close = cryptof_close,
305 .fo_chmod = invfo_chmod,
306 .fo_chown = invfo_chown,
307 .fo_sendfile = invfo_sendfile,
308 };
309
310 static struct csession *csefind(struct fcrypt *, u_int);
311 static int csedelete(struct fcrypt *, struct csession *);
312 static struct csession *cseadd(struct fcrypt *, struct csession *);
313 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
314 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
315 struct auth_hash *);
316 static int csefree(struct csession *);
317
318 static int cryptodev_op(struct csession *, struct crypt_op *,
319 struct ucred *, struct thread *td);
320 static int cryptodev_key(struct crypt_kop *);
321 static int cryptodev_find(struct crypt_find_op *);
322
323 static int
324 cryptof_rw(
325 struct file *fp,
326 struct uio *uio,
327 struct ucred *active_cred,
328 int flags,
329 struct thread *td)
330 {
331
332 return (EIO);
333 }
334
335 static int
336 cryptof_truncate(
337 struct file *fp,
338 off_t length,
339 struct ucred *active_cred,
340 struct thread *td)
341 {
342
343 return (EINVAL);
344 }
345
346 /*
347 * Check a crypto identifier to see if it requested
348 * a software device/driver. This can be done either
349 * by device name/class or through search constraints.
350 */
351 static int
352 checkforsoftware(int crid)
353 {
354 if (crid & CRYPTOCAP_F_SOFTWARE)
355 return EINVAL; /* XXX */
356 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
357 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
358 return EINVAL; /* XXX */
359 return 0;
360 }
361
362 /* ARGSUSED */
363 static int
364 cryptof_ioctl(
365 struct file *fp,
366 u_long cmd,
367 void *data,
368 struct ucred *active_cred,
369 struct thread *td)
370 {
371 #define SES2(p) ((struct session2_op *)p)
372 struct cryptoini cria, crie;
373 struct fcrypt *fcr = fp->f_data;
374 struct csession *cse;
375 struct session_op *sop;
376 struct crypt_op *cop;
377 struct enc_xform *txform = NULL;
378 struct auth_hash *thash = NULL;
379 struct crypt_kop *kop;
380 u_int64_t sid;
381 u_int32_t ses;
382 int error = 0, crid;
383 #ifdef COMPAT_FREEBSD32
384 struct session2_op sopc;
385 struct crypt_op copc;
386 struct crypt_kop kopc;
387 #endif
388
389 switch (cmd) {
390 case CIOCGSESSION:
391 case CIOCGSESSION2:
392 #ifdef COMPAT_FREEBSD32
393 case CIOCGSESSION32:
394 case CIOCGSESSION232:
395 if (cmd == CIOCGSESSION32) {
396 session_op_from_32(data, (struct session_op *)&sopc);
397 sop = (struct session_op *)&sopc;
398 } else if (cmd == CIOCGSESSION232) {
399 session2_op_from_32(data, &sopc);
400 sop = (struct session_op *)&sopc;
401 } else
402 #endif
403 sop = (struct session_op *)data;
404 switch (sop->cipher) {
405 case 0:
406 break;
407 case CRYPTO_DES_CBC:
408 txform = &enc_xform_des;
409 break;
410 case CRYPTO_3DES_CBC:
411 txform = &enc_xform_3des;
412 break;
413 case CRYPTO_BLF_CBC:
414 txform = &enc_xform_blf;
415 break;
416 case CRYPTO_CAST_CBC:
417 txform = &enc_xform_cast5;
418 break;
419 case CRYPTO_SKIPJACK_CBC:
420 txform = &enc_xform_skipjack;
421 break;
422 case CRYPTO_AES_CBC:
423 txform = &enc_xform_rijndael128;
424 break;
425 case CRYPTO_AES_XTS:
426 txform = &enc_xform_aes_xts;
427 break;
428 case CRYPTO_NULL_CBC:
429 txform = &enc_xform_null;
430 break;
431 case CRYPTO_ARC4:
432 txform = &enc_xform_arc4;
433 break;
434 case CRYPTO_CAMELLIA_CBC:
435 txform = &enc_xform_camellia;
436 break;
437 default:
438 return (EINVAL);
439 }
440
441 switch (sop->mac) {
442 case 0:
443 break;
444 case CRYPTO_MD5_HMAC:
445 thash = &auth_hash_hmac_md5;
446 break;
447 case CRYPTO_SHA1_HMAC:
448 thash = &auth_hash_hmac_sha1;
449 break;
450 case CRYPTO_SHA2_256_HMAC:
451 thash = &auth_hash_hmac_sha2_256;
452 break;
453 case CRYPTO_SHA2_384_HMAC:
454 thash = &auth_hash_hmac_sha2_384;
455 break;
456 case CRYPTO_SHA2_512_HMAC:
457 thash = &auth_hash_hmac_sha2_512;
458 break;
459 case CRYPTO_RIPEMD160_HMAC:
460 thash = &auth_hash_hmac_ripemd_160;
461 break;
462 #ifdef notdef
463 case CRYPTO_MD5:
464 thash = &auth_hash_md5;
465 break;
466 case CRYPTO_SHA1:
467 thash = &auth_hash_sha1;
468 break;
469 #endif
470 case CRYPTO_NULL_HMAC:
471 thash = &auth_hash_null;
472 break;
473 default:
474 return (EINVAL);
475 }
476
477 bzero(&crie, sizeof(crie));
478 bzero(&cria, sizeof(cria));
479
480 if (txform) {
481 crie.cri_alg = txform->type;
482 crie.cri_klen = sop->keylen * 8;
483 if (sop->keylen > txform->maxkey ||
484 sop->keylen < txform->minkey) {
485 error = EINVAL;
486 goto bail;
487 }
488
489 crie.cri_key = malloc(crie.cri_klen / 8,
490 M_XDATA, M_WAITOK);
491 if ((error = copyin(sop->key, crie.cri_key,
492 crie.cri_klen / 8)))
493 goto bail;
494 if (thash)
495 crie.cri_next = &cria;
496 }
497
498 if (thash) {
499 cria.cri_alg = thash->type;
500 cria.cri_klen = sop->mackeylen * 8;
501 if (sop->mackeylen != thash->keysize) {
502 error = EINVAL;
503 goto bail;
504 }
505
506 if (cria.cri_klen) {
507 cria.cri_key = malloc(cria.cri_klen / 8,
508 M_XDATA, M_WAITOK);
509 if ((error = copyin(sop->mackey, cria.cri_key,
510 cria.cri_klen / 8)))
511 goto bail;
512 }
513 }
514
515 /* NB: CIOCGSESSION2 has the crid */
516 if (cmd == CIOCGSESSION2
517 #ifdef COMPAT_FREEBSD32
518 || cmd == CIOCGSESSION232
519 #endif
520 ) {
521 crid = SES2(sop)->crid;
522 error = checkforsoftware(crid);
523 if (error)
524 goto bail;
525 } else
526 crid = CRYPTOCAP_F_HARDWARE;
527 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
528 if (error)
529 goto bail;
530
531 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
532 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
533 thash);
534
535 if (cse == NULL) {
536 crypto_freesession(sid);
537 error = EINVAL;
538 goto bail;
539 }
540 sop->ses = cse->ses;
541 if (cmd == CIOCGSESSION2
542 #ifdef COMPAT_FREEBSD32
543 || cmd == CIOCGSESSION232
544 #endif
545 ) {
546 /* return hardware/driver id */
547 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
548 }
549 bail:
550 if (error) {
551 if (crie.cri_key)
552 free(crie.cri_key, M_XDATA);
553 if (cria.cri_key)
554 free(cria.cri_key, M_XDATA);
555 }
556 #ifdef COMPAT_FREEBSD32
557 else {
558 if (cmd == CIOCGSESSION32)
559 session_op_to_32(sop, data);
560 else if (cmd == CIOCGSESSION232)
561 session2_op_to_32((struct session2_op *)sop,
562 data);
563 }
564 #endif
565 break;
566 case CIOCFSESSION:
567 ses = *(u_int32_t *)data;
568 cse = csefind(fcr, ses);
569 if (cse == NULL)
570 return (EINVAL);
571 csedelete(fcr, cse);
572 error = csefree(cse);
573 break;
574 case CIOCCRYPT:
575 #ifdef COMPAT_FREEBSD32
576 case CIOCCRYPT32:
577 if (cmd == CIOCCRYPT32) {
578 cop = &copc;
579 crypt_op_from_32(data, cop);
580 } else
581 #endif
582 cop = (struct crypt_op *)data;
583 cse = csefind(fcr, cop->ses);
584 if (cse == NULL)
585 return (EINVAL);
586 error = cryptodev_op(cse, cop, active_cred, td);
587 #ifdef COMPAT_FREEBSD32
588 if (error == 0 && cmd == CIOCCRYPT32)
589 crypt_op_to_32(cop, data);
590 #endif
591 break;
592 case CIOCKEY:
593 case CIOCKEY2:
594 #ifdef COMPAT_FREEBSD32
595 case CIOCKEY32:
596 case CIOCKEY232:
597 #endif
598 if (!crypto_userasymcrypto)
599 return (EPERM); /* XXX compat? */
600 #ifdef COMPAT_FREEBSD32
601 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
602 kop = &kopc;
603 crypt_kop_from_32(data, kop);
604 } else
605 #endif
606 kop = (struct crypt_kop *)data;
607 if (cmd == CIOCKEY
608 #ifdef COMPAT_FREEBSD32
609 || cmd == CIOCKEY32
610 #endif
611 ) {
612 /* NB: crypto core enforces s/w driver use */
613 kop->crk_crid =
614 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
615 }
616 mtx_lock(&Giant);
617 error = cryptodev_key(kop);
618 mtx_unlock(&Giant);
619 #ifdef COMPAT_FREEBSD32
620 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
621 crypt_kop_to_32(kop, data);
622 #endif
623 break;
624 case CIOCASYMFEAT:
625 if (!crypto_userasymcrypto) {
626 /*
627 * NB: if user asym crypto operations are
628 * not permitted return "no algorithms"
629 * so well-behaved applications will just
630 * fallback to doing them in software.
631 */
632 *(int *)data = 0;
633 } else
634 error = crypto_getfeat((int *)data);
635 break;
636 case CIOCFINDDEV:
637 error = cryptodev_find((struct crypt_find_op *)data);
638 break;
639 default:
640 error = EINVAL;
641 break;
642 }
643 return (error);
644 #undef SES2
645 }
646
647 static int cryptodev_cb(void *);
648
649
650 static int
651 cryptodev_op(
652 struct csession *cse,
653 struct crypt_op *cop,
654 struct ucred *active_cred,
655 struct thread *td)
656 {
657 struct cryptop *crp = NULL;
658 struct cryptodesc *crde = NULL, *crda = NULL;
659 int error;
660
661 if (cop->len > 256*1024-4)
662 return (E2BIG);
663
664 if (cse->txform) {
665 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
666 return (EINVAL);
667 }
668
669 cse->uio.uio_iov = &cse->iovec;
670 cse->uio.uio_iovcnt = 1;
671 cse->uio.uio_offset = 0;
672 cse->uio.uio_resid = cop->len;
673 cse->uio.uio_segflg = UIO_SYSSPACE;
674 cse->uio.uio_rw = UIO_WRITE;
675 cse->uio.uio_td = td;
676 cse->uio.uio_iov[0].iov_len = cop->len;
677 if (cse->thash) {
678 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
679 cse->uio.uio_resid += cse->thash->hashsize;
680 }
681 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len,
682 M_XDATA, M_WAITOK);
683
684 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
685 if (crp == NULL) {
686 error = ENOMEM;
687 goto bail;
688 }
689
690 if (cse->thash) {
691 crda = crp->crp_desc;
692 if (cse->txform)
693 crde = crda->crd_next;
694 } else {
695 if (cse->txform)
696 crde = crp->crp_desc;
697 else {
698 error = EINVAL;
699 goto bail;
700 }
701 }
702
703 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
704 goto bail;
705
706 if (crda) {
707 crda->crd_skip = 0;
708 crda->crd_len = cop->len;
709 crda->crd_inject = cop->len;
710
711 crda->crd_alg = cse->mac;
712 crda->crd_key = cse->mackey;
713 crda->crd_klen = cse->mackeylen * 8;
714 }
715
716 if (crde) {
717 if (cop->op == COP_ENCRYPT)
718 crde->crd_flags |= CRD_F_ENCRYPT;
719 else
720 crde->crd_flags &= ~CRD_F_ENCRYPT;
721 crde->crd_len = cop->len;
722 crde->crd_inject = 0;
723
724 crde->crd_alg = cse->cipher;
725 crde->crd_key = cse->key;
726 crde->crd_klen = cse->keylen * 8;
727 }
728
729 crp->crp_ilen = cop->len;
730 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
731 | (cop->flags & COP_F_BATCH);
732 crp->crp_buf = (caddr_t)&cse->uio;
733 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
734 crp->crp_sid = cse->sid;
735 crp->crp_opaque = (void *)cse;
736
737 if (cop->iv) {
738 if (crde == NULL) {
739 error = EINVAL;
740 goto bail;
741 }
742 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
743 error = EINVAL;
744 goto bail;
745 }
746 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
747 goto bail;
748 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
749 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
750 crde->crd_skip = 0;
751 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
752 crde->crd_skip = 0;
753 } else if (crde) {
754 crde->crd_flags |= CRD_F_IV_PRESENT;
755 crde->crd_skip = cse->txform->blocksize;
756 crde->crd_len -= cse->txform->blocksize;
757 }
758
759 if (cop->mac && crda == NULL) {
760 error = EINVAL;
761 goto bail;
762 }
763
764 again:
765 /*
766 * Let the dispatch run unlocked, then, interlock against the
767 * callback before checking if the operation completed and going
768 * to sleep. This insures drivers don't inherit our lock which
769 * results in a lock order reversal between crypto_dispatch forced
770 * entry and the crypto_done callback into us.
771 */
772 error = crypto_dispatch(crp);
773 mtx_lock(&cse->lock);
774 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
775 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
776 mtx_unlock(&cse->lock);
777
778 if (error != 0)
779 goto bail;
780
781 if (crp->crp_etype == EAGAIN) {
782 crp->crp_etype = 0;
783 crp->crp_flags &= ~CRYPTO_F_DONE;
784 goto again;
785 }
786
787 if (crp->crp_etype != 0) {
788 error = crp->crp_etype;
789 goto bail;
790 }
791
792 if (cse->error) {
793 error = cse->error;
794 goto bail;
795 }
796
797 if (cop->dst &&
798 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
799 goto bail;
800
801 if (cop->mac &&
802 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
803 cop->mac, cse->thash->hashsize)))
804 goto bail;
805
806 bail:
807 if (crp)
808 crypto_freereq(crp);
809 if (cse->uio.uio_iov[0].iov_base)
810 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
811
812 return (error);
813 }
814
815 static int
816 cryptodev_cb(void *op)
817 {
818 struct cryptop *crp = (struct cryptop *) op;
819 struct csession *cse = (struct csession *)crp->crp_opaque;
820
821 mtx_lock(&cse->lock);
822 cse->error = crp->crp_etype;
823 wakeup_one(crp);
824 mtx_unlock(&cse->lock);
825 return (0);
826 }
827
828 static int
829 cryptodevkey_cb(void *op)
830 {
831 struct cryptkop *krp = (struct cryptkop *) op;
832
833 wakeup_one(krp);
834 return (0);
835 }
836
837 static int
838 cryptodev_key(struct crypt_kop *kop)
839 {
840 struct cryptkop *krp = NULL;
841 int error = EINVAL;
842 int in, out, size, i;
843
844 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
845 return (EFBIG);
846 }
847
848 in = kop->crk_iparams;
849 out = kop->crk_oparams;
850 switch (kop->crk_op) {
851 case CRK_MOD_EXP:
852 if (in == 3 && out == 1)
853 break;
854 return (EINVAL);
855 case CRK_MOD_EXP_CRT:
856 if (in == 6 && out == 1)
857 break;
858 return (EINVAL);
859 case CRK_DSA_SIGN:
860 if (in == 5 && out == 2)
861 break;
862 return (EINVAL);
863 case CRK_DSA_VERIFY:
864 if (in == 7 && out == 0)
865 break;
866 return (EINVAL);
867 case CRK_DH_COMPUTE_KEY:
868 if (in == 3 && out == 1)
869 break;
870 return (EINVAL);
871 default:
872 return (EINVAL);
873 }
874
875 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
876 if (!krp)
877 return (ENOMEM);
878 krp->krp_op = kop->crk_op;
879 krp->krp_status = kop->crk_status;
880 krp->krp_iparams = kop->crk_iparams;
881 krp->krp_oparams = kop->crk_oparams;
882 krp->krp_crid = kop->crk_crid;
883 krp->krp_status = 0;
884 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
885
886 for (i = 0; i < CRK_MAXPARAM; i++) {
887 if (kop->crk_param[i].crp_nbits > 65536)
888 /* Limit is the same as in OpenBSD */
889 goto fail;
890 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
891 }
892 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
893 size = (krp->krp_param[i].crp_nbits + 7) / 8;
894 if (size == 0)
895 continue;
896 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
897 if (i >= krp->krp_iparams)
898 continue;
899 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
900 if (error)
901 goto fail;
902 }
903
904 error = crypto_kdispatch(krp);
905 if (error)
906 goto fail;
907 error = tsleep(krp, PSOCK, "crydev", 0);
908 if (error) {
909 /* XXX can this happen? if so, how do we recover? */
910 goto fail;
911 }
912
913 kop->crk_crid = krp->krp_crid; /* device that did the work */
914 if (krp->krp_status != 0) {
915 error = krp->krp_status;
916 goto fail;
917 }
918
919 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
920 size = (krp->krp_param[i].crp_nbits + 7) / 8;
921 if (size == 0)
922 continue;
923 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
924 if (error)
925 goto fail;
926 }
927
928 fail:
929 if (krp) {
930 kop->crk_status = krp->krp_status;
931 for (i = 0; i < CRK_MAXPARAM; i++) {
932 if (krp->krp_param[i].crp_p)
933 free(krp->krp_param[i].crp_p, M_XDATA);
934 }
935 free(krp, M_XDATA);
936 }
937 return (error);
938 }
939
940 static int
941 cryptodev_find(struct crypt_find_op *find)
942 {
943 device_t dev;
944
945 if (find->crid != -1) {
946 dev = crypto_find_device_byhid(find->crid);
947 if (dev == NULL)
948 return (ENOENT);
949 strlcpy(find->name, device_get_nameunit(dev),
950 sizeof(find->name));
951 } else {
952 find->crid = crypto_find_driver(find->name);
953 if (find->crid == -1)
954 return (ENOENT);
955 }
956 return (0);
957 }
958
959 /* ARGSUSED */
960 static int
961 cryptof_poll(
962 struct file *fp,
963 int events,
964 struct ucred *active_cred,
965 struct thread *td)
966 {
967
968 return (0);
969 }
970
971 /* ARGSUSED */
972 static int
973 cryptof_kqfilter(struct file *fp, struct knote *kn)
974 {
975
976 return (0);
977 }
978
979 /* ARGSUSED */
980 static int
981 cryptof_stat(
982 struct file *fp,
983 struct stat *sb,
984 struct ucred *active_cred,
985 struct thread *td)
986 {
987
988 return (EOPNOTSUPP);
989 }
990
991 /* ARGSUSED */
992 static int
993 cryptof_close(struct file *fp, struct thread *td)
994 {
995 struct fcrypt *fcr = fp->f_data;
996 struct csession *cse;
997
998 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
999 TAILQ_REMOVE(&fcr->csessions, cse, next);
1000 (void)csefree(cse);
1001 }
1002 free(fcr, M_XDATA);
1003 fp->f_data = NULL;
1004 return 0;
1005 }
1006
1007 static struct csession *
1008 csefind(struct fcrypt *fcr, u_int ses)
1009 {
1010 struct csession *cse;
1011
1012 TAILQ_FOREACH(cse, &fcr->csessions, next)
1013 if (cse->ses == ses)
1014 return (cse);
1015 return (NULL);
1016 }
1017
1018 static int
1019 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1020 {
1021 struct csession *cse;
1022
1023 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1024 if (cse == cse_del) {
1025 TAILQ_REMOVE(&fcr->csessions, cse, next);
1026 return (1);
1027 }
1028 }
1029 return (0);
1030 }
1031
1032 static struct csession *
1033 cseadd(struct fcrypt *fcr, struct csession *cse)
1034 {
1035 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1036 cse->ses = fcr->sesn++;
1037 return (cse);
1038 }
1039
1040 struct csession *
1041 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
1042 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1043 struct enc_xform *txform, struct auth_hash *thash)
1044 {
1045 struct csession *cse;
1046
1047 #ifdef INVARIANTS
1048 /* NB: required when mtx_init is built with INVARIANTS */
1049 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1050 #else
1051 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT);
1052 #endif
1053 if (cse == NULL)
1054 return NULL;
1055 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1056 cse->key = key;
1057 cse->keylen = keylen/8;
1058 cse->mackey = mackey;
1059 cse->mackeylen = mackeylen/8;
1060 cse->sid = sid;
1061 cse->cipher = cipher;
1062 cse->mac = mac;
1063 cse->txform = txform;
1064 cse->thash = thash;
1065 cseadd(fcr, cse);
1066 return (cse);
1067 }
1068
1069 static int
1070 csefree(struct csession *cse)
1071 {
1072 int error;
1073
1074 error = crypto_freesession(cse->sid);
1075 mtx_destroy(&cse->lock);
1076 if (cse->key)
1077 free(cse->key, M_XDATA);
1078 if (cse->mackey)
1079 free(cse->mackey, M_XDATA);
1080 free(cse, M_XDATA);
1081 return (error);
1082 }
1083
1084 static int
1085 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1086 {
1087 return (0);
1088 }
1089
1090 static int
1091 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1092 {
1093 return (EIO);
1094 }
1095
1096 static int
1097 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1098 {
1099 return (EIO);
1100 }
1101
1102 static int
1103 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1104 {
1105 struct file *f;
1106 struct fcrypt *fcr;
1107 int fd, error;
1108
1109 switch (cmd) {
1110 case CRIOGET:
1111 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1112 TAILQ_INIT(&fcr->csessions);
1113 fcr->sesn = 0;
1114
1115 error = falloc(td, &f, &fd, 0);
1116
1117 if (error) {
1118 free(fcr, M_XDATA);
1119 return (error);
1120 }
1121 /* falloc automatically provides an extra reference to 'f'. */
1122 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1123 *(u_int32_t *)data = fd;
1124 fdrop(f, td);
1125 break;
1126 case CRIOFINDDEV:
1127 error = cryptodev_find((struct crypt_find_op *)data);
1128 break;
1129 case CRIOASYMFEAT:
1130 error = crypto_getfeat((int *)data);
1131 break;
1132 default:
1133 error = EINVAL;
1134 break;
1135 }
1136 return (error);
1137 }
1138
1139 static struct cdevsw crypto_cdevsw = {
1140 .d_version = D_VERSION,
1141 .d_flags = D_NEEDGIANT,
1142 .d_open = cryptoopen,
1143 .d_read = cryptoread,
1144 .d_write = cryptowrite,
1145 .d_ioctl = cryptoioctl,
1146 .d_name = "crypto",
1147 };
1148 static struct cdev *crypto_dev;
1149
1150 /*
1151 * Initialization code, both for static and dynamic loading.
1152 */
1153 static int
1154 cryptodev_modevent(module_t mod, int type, void *unused)
1155 {
1156 switch (type) {
1157 case MOD_LOAD:
1158 if (bootverbose)
1159 printf("crypto: <crypto device>\n");
1160 crypto_dev = make_dev(&crypto_cdevsw, 0,
1161 UID_ROOT, GID_WHEEL, 0666,
1162 "crypto");
1163 return 0;
1164 case MOD_UNLOAD:
1165 /*XXX disallow if active sessions */
1166 destroy_dev(crypto_dev);
1167 return 0;
1168 }
1169 return EINVAL;
1170 }
1171
1172 static moduledata_t cryptodev_mod = {
1173 "cryptodev",
1174 cryptodev_modevent,
1175 0
1176 };
1177 MODULE_VERSION(cryptodev, 1);
1178 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1179 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1180 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
Cache object: 73479c4dd6acde95a8b6cf4c0d618f39
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