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syscons - Fix NULL pointer access in 0d7c8a4d1cafae68239
[dragonfly.git] / sys / opencrypto / cryptodev.c
blob5ff7dea0f6cca4682ee2836d6b2c7054924a7b68
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
57 #include <opencrypto/cryptodev.h>
58 #include <opencrypto/xform.h>
59
60 struct csession {
61 TAILQ_ENTRY(csession) next;
62 u_int64_t sid;
63 u_int32_t ses;
64 struct lock lock;
65
66 u_int32_t cipher;
67 struct enc_xform *txform;
68 u_int32_t mac;
69 struct auth_hash *thash;
70
71 caddr_t key;
72 int keylen;
73 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
74
75 caddr_t mackey;
76 int mackeylen;
77
78 struct iovec iovec;
79 struct uio uio;
80 int error;
81 uint32_t busy;
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, int *);
108 static void csedrop(struct csession *);
109 static int csedelete(struct fcrypt *, struct csession *);
110 static struct csession *cseadd(struct fcrypt *, struct csession *);
111 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
112 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
113 struct auth_hash *);
114 static int csefree(struct csession *);
115
116 static int cryptodev_op(struct csession *, struct crypt_op *, struct ucred *);
117 static int cryptodev_key(struct crypt_kop *);
118 static int cryptodev_find(struct crypt_find_op *);
119
120 static struct lock cryptodev_lock = LOCK_INITIALIZER("cryptodev", 0, 0);
121
122 static int
123 cryptof_rw(
124 struct file *fp,
125 struct uio *uio,
126 struct ucred *active_cred,
127 int flags)
128 {
129 return (EIO);
130 }
131
132 /*
133 * Check a crypto identifier to see if it requested
134 * a software device/driver. This can be done either
135 * by device name/class or through search constraints.
136 */
137 static int
138 checkforsoftware(int crid)
139 {
140 if (crid & CRYPTOCAP_F_SOFTWARE)
141 return EINVAL; /* XXX */
142 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
143 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
144 return EINVAL; /* XXX */
145 return 0;
146 }
147
148 /* ARGSUSED */
149 static int
150 cryptof_ioctl(struct file *fp, u_long cmd, caddr_t data,
151 struct ucred *cred, struct sysmsg *msg)
152 {
153 #define SES2(p) ((struct session2_op *)p)
154 struct cryptoini cria, crie;
155 struct fcrypt *fcr = fp->f_data;
156 struct csession *cse;
157 struct session_op *sop;
158 struct crypt_op *cop;
159 struct enc_xform *txform = NULL;
160 struct auth_hash *thash = NULL;
161 struct crypt_kop *kop;
162 u_int64_t sid;
163 u_int32_t ses;
164 int error = 0, crid;
165
166 switch (cmd) {
167 case CIOCGSESSION:
168 case CIOCGSESSION2:
169 sop = (struct session_op *)data;
170 switch (sop->cipher) {
171 case 0:
172 break;
173 case CRYPTO_DES_CBC:
174 txform = &enc_xform_des;
175 break;
176 case CRYPTO_3DES_CBC:
177 txform = &enc_xform_3des;
178 break;
179 case CRYPTO_BLF_CBC:
180 txform = &enc_xform_blf;
181 break;
182 case CRYPTO_CAST_CBC:
183 txform = &enc_xform_cast5;
184 break;
185 case CRYPTO_SKIPJACK_CBC:
186 txform = &enc_xform_skipjack;
187 break;
188 case CRYPTO_AES_CBC:
189 txform = &enc_xform_rijndael128;
190 break;
191 case CRYPTO_AES_XTS:
192 txform = &enc_xform_aes_xts;
193 break;
194 case CRYPTO_AES_CTR:
195 txform = &enc_xform_aes_ctr;
196 break;
197 case CRYPTO_NULL_CBC:
198 txform = &enc_xform_null;
199 break;
200 case CRYPTO_ARC4:
201 txform = &enc_xform_arc4;
202 break;
203 case CRYPTO_CAMELLIA_CBC:
204 txform = &enc_xform_camellia;
205 break;
206 case CRYPTO_TWOFISH_CBC:
207 txform = &enc_xform_twofish;
208 break;
209 case CRYPTO_SERPENT_CBC:
210 txform = &enc_xform_serpent;
211 break;
212 case CRYPTO_TWOFISH_XTS:
213 txform = &enc_xform_twofish_xts;
214 break;
215 case CRYPTO_SERPENT_XTS:
216 txform = &enc_xform_serpent_xts;
217 break;
218 default:
219 return (EINVAL);
220 }
221
222 switch (sop->mac) {
223 case 0:
224 break;
225 case CRYPTO_MD5_HMAC:
226 thash = &auth_hash_hmac_md5;
227 break;
228 case CRYPTO_SHA1_HMAC:
229 thash = &auth_hash_hmac_sha1;
230 break;
231 case CRYPTO_SHA2_256_HMAC:
232 thash = &auth_hash_hmac_sha2_256;
233 break;
234 case CRYPTO_SHA2_384_HMAC:
235 thash = &auth_hash_hmac_sha2_384;
236 break;
237 case CRYPTO_SHA2_512_HMAC:
238 thash = &auth_hash_hmac_sha2_512;
239 break;
240 case CRYPTO_RIPEMD160_HMAC:
241 thash = &auth_hash_hmac_ripemd_160;
242 break;
243 #ifdef notdef
244 case CRYPTO_MD5:
245 thash = &auth_hash_md5;
246 break;
247 case CRYPTO_SHA1:
248 thash = &auth_hash_sha1;
249 break;
250 #endif
251 case CRYPTO_NULL_HMAC:
252 thash = &auth_hash_null;
253 break;
254 default:
255 return (EINVAL);
256 }
257
258 bzero(&crie, sizeof(crie));
259 bzero(&cria, sizeof(cria));
260
261 if (txform) {
262 crie.cri_alg = txform->type;
263 crie.cri_klen = sop->keylen * 8;
264 if (sop->keylen > txform->maxkey ||
265 sop->keylen < txform->minkey) {
266 error = EINVAL;
267 goto bail;
268 }
269
270 crie.cri_key = kmalloc(crie.cri_klen / 8,
271 M_XDATA, M_WAITOK);
272 if ((error = copyin(sop->key, crie.cri_key,
273 crie.cri_klen / 8)))
274 goto bail;
275 if (thash)
276 crie.cri_next = &cria;
277 }
278
279 if (thash) {
280 cria.cri_alg = thash->type;
281 cria.cri_klen = sop->mackeylen * 8;
282 if (sop->mackeylen != thash->keysize) {
283 error = EINVAL;
284 goto bail;
285 }
286
287 if (cria.cri_klen) {
288 cria.cri_key = kmalloc(cria.cri_klen / 8,
289 M_XDATA, M_WAITOK);
290 if ((error = copyin(sop->mackey, cria.cri_key,
291 cria.cri_klen / 8)))
292 goto bail;
293 }
294 }
295
296 /* NB: CIOGSESSION2 has the crid */
297 if (cmd == CIOCGSESSION2) {
298 crid = SES2(sop)->crid;
299 error = checkforsoftware(crid);
300 if (error)
301 goto bail;
302 } else {
303 crid = CRYPTOCAP_F_HARDWARE;
304 if (crypto_devallowsoft)
305 crid |= CRYPTOCAP_F_SOFTWARE;
306 }
307 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
308 if (error)
309 goto bail;
310
311 lockmgr(&cryptodev_lock, LK_EXCLUSIVE);
312 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
313 cria.cri_key, cria.cri_klen, sop->cipher,
314 sop->mac, txform, thash);
315 lockmgr(&cryptodev_lock, LK_RELEASE);
316
317 if (cse == NULL) {
318 crypto_freesession(sid);
319 error = EINVAL;
320 goto bail;
321 }
322 sop->ses = cse->ses;
323 if (cmd == CIOCGSESSION2) {
324 /* return hardware/driver id */
325 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
326 }
327 bail:
328 if (error) {
329 if (crie.cri_key) {
330 bzero(crie.cri_key, crie.cri_klen / 8);
331 kfree(crie.cri_key, M_XDATA);
332 }
333 if (cria.cri_key) {
334 bzero(cria.cri_key, cria.cri_klen / 8);
335 kfree(cria.cri_key, M_XDATA);
336 }
337 }
338 break;
339 case CIOCFSESSION:
340 lockmgr(&cryptodev_lock, LK_EXCLUSIVE);
341 ses = *(u_int32_t *)data;
342 cse = csefind(fcr, ses, &error);
343 if (cse) {
344 csedelete(fcr, cse);
345 error = csefree(cse);
346 }
347 lockmgr(&cryptodev_lock, LK_RELEASE);
348 break;
349 case CIOCCRYPT:
350 cop = (struct crypt_op *)data;
351 lockmgr(&cryptodev_lock, LK_EXCLUSIVE);
352 cse = csefind(fcr, cop->ses, &error);
353 lockmgr(&cryptodev_lock, LK_RELEASE);
354 if (cse) {
355 error = cryptodev_op(cse, cop, cred);
356 csedrop(cse);
357 }
358 break;
359 case CIOCKEY:
360 case CIOCKEY2:
361 if (!crypto_userasymcrypto)
362 return (EPERM); /* XXX compat? */
363 lockmgr(&cryptodev_lock, LK_EXCLUSIVE);
364 kop = (struct crypt_kop *)data;
365 if (cmd == CIOCKEY) {
366 /* NB: crypto core enforces s/w driver use */
367 kop->crk_crid =
368 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
369 }
370 error = cryptodev_key(kop);
371 lockmgr(&cryptodev_lock, LK_RELEASE);
372 break;
373 case CIOCASYMFEAT:
374 if (!crypto_userasymcrypto) {
375 /*
376 * NB: if user asym crypto operations are
377 * not permitted return "no algorithms"
378 * so well-behaved applications will just
379 * fallback to doing them in software.
380 */
381 *(int *)data = 0;
382 } else {
383 error = crypto_getfeat((int *)data);
384 }
385 break;
386 case CIOCFINDDEV:
387 error = cryptodev_find((struct crypt_find_op *)data);
388 break;
389 default:
390 error = EINVAL;
391 break;
392 }
393 return (error);
394 #undef SES2
395 }
396
397 static int cryptodev_cb(void *);
398
399 static int
400 cryptodev_op(struct csession *cse, struct crypt_op *cop,
401 struct ucred *active_cred)
402 {
403 struct cryptop *crp = NULL;
404 struct cryptodesc *crde = NULL, *crda = NULL;
405 int error;
406
407 if (cop->len > 256*1024-4)
408 return (E2BIG);
409
410 if (cse->txform) {
411 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
412 return (EINVAL);
413 }
414
415 bzero(&cse->uio, sizeof(cse->uio));
416 cse->uio.uio_iov = &cse->iovec;
417 cse->uio.uio_iovcnt = 1;
418 cse->uio.uio_offset = 0;
419 cse->uio.uio_resid = cop->len;
420 cse->uio.uio_segflg = UIO_SYSSPACE;
421 cse->uio.uio_rw = UIO_WRITE;
422 /* XXX: not sure, was td, now curthread? */
423 cse->uio.uio_td = curthread;
424 cse->uio.uio_iov[0].iov_len = cop->len;
425 if (cse->thash) {
426 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
427 cse->uio.uio_resid += cse->thash->hashsize;
428 }
429 cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len,
430 M_XDATA, M_WAITOK);
431
432 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
433 if (crp == NULL) {
434 error = ENOMEM;
435 goto bail;
436 }
437
438 if (cse->thash) {
439 crda = crp->crp_desc;
440 if (cse->txform)
441 crde = crda->crd_next;
442 } else {
443 if (cse->txform)
444 crde = crp->crp_desc;
445 else {
446 error = EINVAL;
447 goto bail;
448 }
449 }
450
451 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
452 goto bail;
453
454 if (crda) {
455 crda->crd_skip = 0;
456 crda->crd_len = cop->len;
457 crda->crd_inject = cop->len;
458
459 crda->crd_alg = cse->mac;
460 crda->crd_key = cse->mackey;
461 crda->crd_klen = cse->mackeylen * 8;
462 }
463
464 if (crde) {
465 if (cop->op == COP_ENCRYPT)
466 crde->crd_flags |= CRD_F_ENCRYPT;
467 else
468 crde->crd_flags &= ~CRD_F_ENCRYPT;
469 crde->crd_len = cop->len;
470 crde->crd_inject = 0;
471
472 crde->crd_alg = cse->cipher;
473 crde->crd_key = cse->key;
474 crde->crd_klen = cse->keylen * 8;
475 }
476
477 crp->crp_ilen = cop->len;
478 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
479 | (cop->flags & COP_F_BATCH);
480 crp->crp_buf = (caddr_t)&cse->uio;
481 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
482 crp->crp_sid = cse->sid;
483 crp->crp_opaque = (void *)cse;
484
485 if (cop->iv) {
486 if (crde == NULL) {
487 error = EINVAL;
488 goto bail;
489 }
490 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
491 error = EINVAL;
492 goto bail;
493 }
494 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
495 goto bail;
496 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
497 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
498 crde->crd_skip = 0;
499 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
500 crde->crd_skip = 0;
501 } else if (crde) {
502 crde->crd_flags |= CRD_F_IV_PRESENT;
503 crde->crd_skip = cse->txform->blocksize;
504 crde->crd_len -= cse->txform->blocksize;
505 }
506
507 if (cop->mac && crda == NULL) {
508 error = EINVAL;
509 goto bail;
510 }
511
512 again:
513 /*
514 * Let the dispatch run unlocked, then, interlock against the
515 * callback before checking if the operation completed and going
516 * to sleep. This insures drivers don't inherit our lock which
517 * results in a lock order reversal between crypto_dispatch forced
518 * entry and the crypto_done callback into us.
519 */
520 error = crypto_dispatch(crp);
521 lockmgr(&cse->lock, LK_EXCLUSIVE);
522 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
523 error = lksleep(crp, &cse->lock, 0, "crydev", 0);
524 lockmgr(&cse->lock, LK_RELEASE);
525
526 if (error != 0)
527 goto bail;
528
529 if (crp->crp_etype == EAGAIN) {
530 crp->crp_etype = 0;
531 crp->crp_flags &= ~CRYPTO_F_DONE;
532 goto again;
533 }
534
535 if (crp->crp_etype != 0) {
536 error = crp->crp_etype;
537 goto bail;
538 }
539
540 if (cse->error) {
541 error = cse->error;
542 goto bail;
543 }
544
545 if (cop->dst &&
546 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
547 goto bail;
548
549 if (cop->mac &&
550 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
551 cop->mac, cse->thash->hashsize)))
552 goto bail;
553
554 bail:
555 if (crp)
556 crypto_freereq(crp);
557 if (cse->uio.uio_iov[0].iov_base)
558 kfree(cse->uio.uio_iov[0].iov_base, M_XDATA);
559
560 return (error);
561 }
562
563 static int
564 cryptodev_cb(void *op)
565 {
566 struct cryptop *crp = (struct cryptop *) op;
567 struct csession *cse = (struct csession *)crp->crp_opaque;
568
569 lockmgr(&cse->lock, LK_EXCLUSIVE);
570 cse->error = crp->crp_etype;
571 wakeup_one(crp);
572 lockmgr(&cse->lock, LK_RELEASE);
573 return (0);
574 }
575
576 static int
577 cryptodevkey_cb(void *op)
578 {
579 struct cryptkop *krp = (struct cryptkop *) op;
580
581 wakeup_one(krp);
582 return (0);
583 }
584
585 static int
586 cryptodev_key(struct crypt_kop *kop)
587 {
588 struct cryptkop *krp = NULL;
589 int error = EINVAL;
590 int in, out, size, i;
591
592 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
593 return (EFBIG);
594 }
595
596 in = kop->crk_iparams;
597 out = kop->crk_oparams;
598 switch (kop->crk_op) {
599 case CRK_MOD_EXP:
600 if (in == 3 && out == 1)
601 break;
602 return (EINVAL);
603 case CRK_MOD_EXP_CRT:
604 if (in == 6 && out == 1)
605 break;
606 return (EINVAL);
607 case CRK_DSA_SIGN:
608 if (in == 5 && out == 2)
609 break;
610 return (EINVAL);
611 case CRK_DSA_VERIFY:
612 if (in == 7 && out == 0)
613 break;
614 return (EINVAL);
615 case CRK_DH_COMPUTE_KEY:
616 if (in == 3 && out == 1)
617 break;
618 return (EINVAL);
619 default:
620 return (EINVAL);
621 }
622
623 krp = (struct cryptkop *)kmalloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO);
624 krp->krp_op = kop->crk_op;
625 krp->krp_status = kop->crk_status;
626 krp->krp_iparams = kop->crk_iparams;
627 krp->krp_oparams = kop->crk_oparams;
628 krp->krp_crid = kop->crk_crid;
629 krp->krp_status = 0;
630 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
631
632 for (i = 0; i < CRK_MAXPARAM; i++) {
633 if (kop->crk_param[i].crp_nbits > 65536)
634 /* Limit is the same as in OpenBSD */
635 goto fail;
636 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
637 }
638 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
639 size = (krp->krp_param[i].crp_nbits + 7) / 8;
640 if (size == 0)
641 continue;
642 krp->krp_param[i].crp_p = kmalloc(size, M_XDATA, M_WAITOK);
643 if (i >= krp->krp_iparams)
644 continue;
645 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
646 if (error)
647 goto fail;
648 }
649
650 error = crypto_kdispatch(krp);
651 if (error)
652 goto fail;
653 error = tsleep(krp, 0, "crydev", 0);
654 if (error) {
655 /* XXX can this happen? if so, how do we recover? */
656 goto fail;
657 }
658
659 kop->crk_crid = krp->krp_crid; /* device that did the work */
660 if (krp->krp_status != 0) {
661 error = krp->krp_status;
662 goto fail;
663 }
664
665 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
666 size = (krp->krp_param[i].crp_nbits + 7) / 8;
667 if (size == 0)
668 continue;
669 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
670 if (error)
671 goto fail;
672 }
673
674 fail:
675 if (krp) {
676 kop->crk_status = krp->krp_status;
677 for (i = 0; i < CRK_MAXPARAM; i++) {
678 if (krp->krp_param[i].crp_p) {
679 bzero(krp->krp_param[i].crp_p,
680 (krp->krp_param[i].crp_nbits + 7) / 8);
681 kfree(krp->krp_param[i].crp_p, M_XDATA);
682 }
683 }
684 kfree(krp, M_XDATA);
685 }
686 return (error);
687 }
688
689 static int
690 cryptodev_find(struct crypt_find_op *find)
691 {
692 device_t dev;
693
694 if (find->crid != -1) {
695 dev = crypto_find_device_byhid(find->crid);
696 if (dev == NULL)
697 return (ENOENT);
698 strlcpy(find->name, device_get_nameunit(dev),
699 sizeof(find->name));
700 } else {
701 find->crid = crypto_find_driver(find->name);
702 if (find->crid == -1)
703 return (ENOENT);
704 }
705 return (0);
706 }
707
708 /*
709 * MPSAFE
710 */
711 static int
712 cryptof_kqfilter(struct file *fp, struct knote *kn)
713 {
714
715 return (0);
716 }
717
718 /*
719 * MPSAFE
720 */
721 static int
722 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred)
723 {
724 return (EOPNOTSUPP);
725 }
726
727 static int
728 cryptof_close(struct file *fp)
729 {
730 struct fcrypt *fcr = fp->f_data;
731 struct csession *cse;
732
733 lockmgr(&cryptodev_lock, LK_EXCLUSIVE);
734 fcr = (struct fcrypt *)fp->f_data;
735 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
736 TAILQ_REMOVE(&fcr->csessions, cse, next);
737 (void)csefree(cse);
738 }
739 fp->f_data = NULL;
740 lockmgr(&cryptodev_lock, LK_RELEASE);
741
742 kfree(fcr, M_XDATA);
743 return (0);
744 }
745
746 static struct csession *
747 csefind(struct fcrypt *fcr, u_int ses, int *errorp)
748 {
749 struct csession *cse;
750
751 TAILQ_FOREACH(cse, &fcr->csessions, next) {
752 if (cse->ses == ses) {
753 if (cse->busy) {
754 kprintf("csefind: cse %p BUSY\n", cse);
755 *errorp = EBUSY;
756 return NULL;
757 }
758 cse->busy = 1;
759 return (cse);
760 }
761 }
762 *errorp = EINVAL;
763 return (NULL);
764 }
765
766 static void
767 csedrop(struct csession *cse)
768 {
769 cse->busy = 0;
770 }
771
772 static int
773 csedelete(struct fcrypt *fcr, struct csession *cse_del)
774 {
775 struct csession *cse;
776
777 TAILQ_FOREACH(cse, &fcr->csessions, next) {
778 if (cse == cse_del) {
779 TAILQ_REMOVE(&fcr->csessions, cse, next);
780 return (1);
781 }
782 }
783 return (0);
784 }
785
786 static struct csession *
787 cseadd(struct fcrypt *fcr, struct csession *cse)
788 {
789 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
790 cse->ses = fcr->sesn++;
791 return (cse);
792 }
793
794 struct csession *
795 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
796 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
797 struct enc_xform *txform, struct auth_hash *thash)
798 {
799 struct csession *cse;
800
801 cse = kmalloc(sizeof(struct csession), M_XDATA, M_WAITOK | M_ZERO);
802 lockinit(&cse->lock, "cryptodev", 0, LK_CANRECURSE);
803 cse->key = key;
804 cse->keylen = keylen/8;
805 cse->mackey = mackey;
806 cse->mackeylen = mackeylen/8;
807 cse->sid = sid;
808 cse->cipher = cipher;
809 cse->mac = mac;
810 cse->txform = txform;
811 cse->thash = thash;
812 cseadd(fcr, cse);
813 return (cse);
814 }
815
816 static int
817 csefree(struct csession *cse)
818 {
819 int error;
820
821 error = crypto_freesession(cse->sid);
822 lockuninit(&cse->lock);
823 if (cse->key)
824 kfree(cse->key, M_XDATA);
825 if (cse->mackey)
826 kfree(cse->mackey, M_XDATA);
827 kfree(cse, M_XDATA);
828 return (error);
829 }
830
831 static int
832 cryptoopen(struct dev_open_args *ap)
833 {
834 return (0);
835 }
836
837 static int
838 cryptoread(struct dev_read_args *ap)
839 {
840 return (EIO);
841 }
842
843 static int
844 cryptowrite(struct dev_write_args *ap)
845 {
846 return (EIO);
847 }
848
849 static int
850 cryptoioctl(struct dev_ioctl_args *ap)
851 {
852 struct thread *td = curthread;
853 struct file *f;
854 struct fcrypt *fcr;
855 int fd, error;
856
857 switch (ap->a_cmd) {
858 case CRIOGET:
859 fcr = kmalloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
860 TAILQ_INIT(&fcr->csessions);
861 fcr->sesn = 0;
862
863 KKASSERT(td->td_lwp);
864 error = falloc(td->td_lwp, &f, &fd);
865
866 if (error) {
867 kfree(fcr, M_XDATA);
868 return (error);
869 }
870 /* falloc automatically provides an extra reference to 'f'. */
871 f->f_flag = FREAD | FWRITE;
872 f->f_type = DTYPE_CRYPTO;
873 f->f_ops = &cryptofops;
874 f->f_data = fcr;
875 fsetfd(td->td_proc->p_fd, f, fd);
876 *(u_int32_t *)ap->a_data = fd;
877 fdrop(f);
878
879 break;
880 case CRIOFINDDEV:
881 error = cryptodev_find((struct crypt_find_op *)ap->a_data);
882 break;
883 case CRIOASYMFEAT:
884 error = crypto_getfeat((int *)ap->a_data);
885 break;
886 default:
887 error = EINVAL;
888 break;
889 }
890 return (error);
891 }
892
893 static struct dev_ops crypto_ops = {
894 { "crypto", 0, D_MPSAFE },
895 .d_open = cryptoopen,
896 .d_read = cryptoread,
897 .d_write = cryptowrite,
898 .d_ioctl = cryptoioctl,
899 };
900
901 /*
902 * Initialization code, both for static and dynamic loading.
903 */
904 static int
905 cryptodev_modevent(module_t mod, int type, void *unused)
906 {
907 switch (type) {
908 case MOD_LOAD:
909 if (bootverbose)
910 kprintf("crypto: <crypto device>\n");
911 make_dev(&crypto_ops, 0, UID_ROOT, GID_WHEEL,
912 0666, "crypto");
913 return 0;
914 case MOD_UNLOAD:
915 /*XXX disallow if active sessions */
916 //dev_ops_remove(&crypto_ops, 0, 0);
917 dev_ops_remove_all(&crypto_ops);
918 return 0;
919 }
920 return EINVAL;
921 }
922
923 static moduledata_t cryptodev_mod = {
924 "cryptodev",
925 cryptodev_modevent,
926 0
927 };
928 MODULE_VERSION(cryptodev, 1);
929 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
930 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
DragonFly BSD