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 * Copyright (c) 2014 The FreeBSD Foundation
7 * All rights reserved.
8 *
9 * Portions of this software were developed by John-Mark Gurney
10 * under sponsorship of the FreeBSD Foundation and
11 * Rubicon Communications, LLC (Netgate).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. The name of the author may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 * Effort sponsored in part by the Defense Advanced Research Projects
37 * Agency (DARPA) and Air Force Research Laboratory, Air Force
38 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
39 */
40
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
43
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/malloc.h>
47 #include <sys/mbuf.h>
48 #include <sys/lock.h>
49 #include <sys/mutex.h>
50 #include <sys/sysctl.h>
51 #include <sys/file.h>
52 #include <sys/filedesc.h>
53 #include <sys/errno.h>
54 #include <sys/uio.h>
55 #include <sys/random.h>
56 #include <sys/conf.h>
57 #include <sys/kernel.h>
58 #include <sys/module.h>
59 #include <sys/fcntl.h>
60 #include <sys/bus.h>
61 #include <sys/user.h>
62 #include <sys/sdt.h>
63
64 #include <opencrypto/cryptodev.h>
65 #include <opencrypto/xform.h>
66
67 SDT_PROVIDER_DECLARE(opencrypto);
68
69 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
70
71 #ifdef COMPAT_FREEBSD32
72 #include <sys/mount.h>
73 #include <compat/freebsd32/freebsd32.h>
74
75 struct session_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 };
84
85 struct session2_op32 {
86 u_int32_t cipher;
87 u_int32_t mac;
88 u_int32_t keylen;
89 u_int32_t key;
90 int mackeylen;
91 u_int32_t mackey;
92 u_int32_t ses;
93 int crid;
94 int pad[4];
95 };
96
97 struct crypt_op32 {
98 u_int32_t ses;
99 u_int16_t op;
100 u_int16_t flags;
101 u_int len;
102 u_int32_t src, dst;
103 u_int32_t mac;
104 u_int32_t iv;
105 };
106
107 struct crparam32 {
108 u_int32_t crp_p;
109 u_int crp_nbits;
110 };
111
112 struct crypt_kop32 {
113 u_int crk_op;
114 u_int crk_status;
115 u_short crk_iparams;
116 u_short crk_oparams;
117 u_int crk_crid;
118 struct crparam32 crk_param[CRK_MAXPARAM];
119 };
120
121 struct cryptotstat32 {
122 struct timespec32 acc;
123 struct timespec32 min;
124 struct timespec32 max;
125 u_int32_t count;
126 };
127
128 struct cryptostats32 {
129 u_int32_t cs_ops;
130 u_int32_t cs_errs;
131 u_int32_t cs_kops;
132 u_int32_t cs_kerrs;
133 u_int32_t cs_intrs;
134 u_int32_t cs_rets;
135 u_int32_t cs_blocks;
136 u_int32_t cs_kblocks;
137 struct cryptotstat32 cs_invoke;
138 struct cryptotstat32 cs_done;
139 struct cryptotstat32 cs_cb;
140 struct cryptotstat32 cs_finis;
141 };
142
143 #define CIOCGSESSION32 _IOWR('c', 101, struct session_op32)
144 #define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32)
145 #define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32)
146 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
147 #define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32)
148
149 static void
session_op_from_32(const struct session_op32 * from,struct session_op * to)150 session_op_from_32(const struct session_op32 *from, struct session_op *to)
151 {
152
153 CP(*from, *to, cipher);
154 CP(*from, *to, mac);
155 CP(*from, *to, keylen);
156 PTRIN_CP(*from, *to, key);
157 CP(*from, *to, mackeylen);
158 PTRIN_CP(*from, *to, mackey);
159 CP(*from, *to, ses);
160 }
161
162 static void
session2_op_from_32(const struct session2_op32 * from,struct session2_op * to)163 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
164 {
165
166 session_op_from_32((const struct session_op32 *)from,
167 (struct session_op *)to);
168 CP(*from, *to, crid);
169 }
170
171 static void
session_op_to_32(const struct session_op * from,struct session_op32 * to)172 session_op_to_32(const struct session_op *from, struct session_op32 *to)
173 {
174
175 CP(*from, *to, cipher);
176 CP(*from, *to, mac);
177 CP(*from, *to, keylen);
178 PTROUT_CP(*from, *to, key);
179 CP(*from, *to, mackeylen);
180 PTROUT_CP(*from, *to, mackey);
181 CP(*from, *to, ses);
182 }
183
184 static void
session2_op_to_32(const struct session2_op * from,struct session2_op32 * to)185 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
186 {
187
188 session_op_to_32((const struct session_op *)from,
189 (struct session_op32 *)to);
190 CP(*from, *to, crid);
191 }
192
193 static void
crypt_op_from_32(const struct crypt_op32 * from,struct crypt_op * to)194 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
195 {
196
197 CP(*from, *to, ses);
198 CP(*from, *to, op);
199 CP(*from, *to, flags);
200 CP(*from, *to, len);
201 PTRIN_CP(*from, *to, src);
202 PTRIN_CP(*from, *to, dst);
203 PTRIN_CP(*from, *to, mac);
204 PTRIN_CP(*from, *to, iv);
205 }
206
207 static void
crypt_op_to_32(const struct crypt_op * from,struct crypt_op32 * to)208 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
209 {
210
211 CP(*from, *to, ses);
212 CP(*from, *to, op);
213 CP(*from, *to, flags);
214 CP(*from, *to, len);
215 PTROUT_CP(*from, *to, src);
216 PTROUT_CP(*from, *to, dst);
217 PTROUT_CP(*from, *to, mac);
218 PTROUT_CP(*from, *to, iv);
219 }
220
221 static void
crparam_from_32(const struct crparam32 * from,struct crparam * to)222 crparam_from_32(const struct crparam32 *from, struct crparam *to)
223 {
224
225 PTRIN_CP(*from, *to, crp_p);
226 CP(*from, *to, crp_nbits);
227 }
228
229 static void
crparam_to_32(const struct crparam * from,struct crparam32 * to)230 crparam_to_32(const struct crparam *from, struct crparam32 *to)
231 {
232
233 PTROUT_CP(*from, *to, crp_p);
234 CP(*from, *to, crp_nbits);
235 }
236
237 static void
crypt_kop_from_32(const struct crypt_kop32 * from,struct crypt_kop * to)238 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
239 {
240 int i;
241
242 CP(*from, *to, crk_op);
243 CP(*from, *to, crk_status);
244 CP(*from, *to, crk_iparams);
245 CP(*from, *to, crk_oparams);
246 CP(*from, *to, crk_crid);
247 for (i = 0; i < CRK_MAXPARAM; i++)
248 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
249 }
250
251 static void
crypt_kop_to_32(const struct crypt_kop * from,struct crypt_kop32 * to)252 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
253 {
254 int i;
255
256 CP(*from, *to, crk_op);
257 CP(*from, *to, crk_status);
258 CP(*from, *to, crk_iparams);
259 CP(*from, *to, crk_oparams);
260 CP(*from, *to, crk_crid);
261 for (i = 0; i < CRK_MAXPARAM; i++)
262 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
263 }
264 #endif
265
266 struct csession {
267 TAILQ_ENTRY(csession) next;
268 crypto_session_t cses;
269 volatile u_int refs;
270 u_int32_t ses;
271 struct mtx lock; /* for op submission */
272
273 u_int32_t cipher;
274 struct enc_xform *txform;
275 u_int32_t mac;
276 struct auth_hash *thash;
277
278 caddr_t key;
279 int keylen;
280
281 caddr_t mackey;
282 int mackeylen;
283 };
284
285 struct cryptop_data {
286 struct csession *cse;
287
288 struct iovec iovec[1];
289 struct uio uio;
290 bool done;
291 };
292
293 struct fcrypt {
294 TAILQ_HEAD(csessionlist, csession) csessions;
295 int sesn;
296 struct mtx lock;
297 };
298
299 static struct timeval warninterval = { .tv_sec = 60, .tv_usec = 0 };
300 SYSCTL_TIMEVAL_SEC(_kern, OID_AUTO, cryptodev_warn_interval, CTLFLAG_RW,
301 &warninterval,
302 "Delay in seconds between warnings of deprecated /dev/crypto algorithms");
303
304 static int cryptof_ioctl(struct file *, u_long, void *,
305 struct ucred *, struct thread *);
306 static int cryptof_stat(struct file *, struct stat *,
307 struct ucred *, struct thread *);
308 static int cryptof_close(struct file *, struct thread *);
309 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
310 struct filedesc *);
311
312 static struct fileops cryptofops = {
313 .fo_read = invfo_rdwr,
314 .fo_write = invfo_rdwr,
315 .fo_truncate = invfo_truncate,
316 .fo_ioctl = cryptof_ioctl,
317 .fo_poll = invfo_poll,
318 .fo_kqfilter = invfo_kqfilter,
319 .fo_stat = cryptof_stat,
320 .fo_close = cryptof_close,
321 .fo_chmod = invfo_chmod,
322 .fo_chown = invfo_chown,
323 .fo_sendfile = invfo_sendfile,
324 .fo_fill_kinfo = cryptof_fill_kinfo,
325 };
326
327 static struct csession *csefind(struct fcrypt *, u_int);
328 static bool csedelete(struct fcrypt *, u_int);
329 static struct csession *csecreate(struct fcrypt *, crypto_session_t, caddr_t,
330 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
331 struct auth_hash *);
332 static void csefree(struct csession *);
333
334 static int cryptodev_op(struct csession *, struct crypt_op *,
335 struct ucred *, struct thread *td);
336 static int cryptodev_aead(struct csession *, struct crypt_aead *,
337 struct ucred *, struct thread *);
338 static int cryptodev_key(struct crypt_kop *);
339 static int cryptodev_find(struct crypt_find_op *);
340
341 /*
342 * Check a crypto identifier to see if it requested
343 * a software device/driver. This can be done either
344 * by device name/class or through search constraints.
345 */
346 static int
checkforsoftware(int * cridp)347 checkforsoftware(int *cridp)
348 {
349 int crid;
350
351 crid = *cridp;
352
353 if (!crypto_devallowsoft) {
354 if (crid & CRYPTOCAP_F_SOFTWARE) {
355 if (crid & CRYPTOCAP_F_HARDWARE) {
356 *cridp = CRYPTOCAP_F_HARDWARE;
357 return 0;
358 }
359 return EINVAL;
360 }
361 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
362 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
363 return EINVAL;
364 }
365 return 0;
366 }
367
368 /* ARGSUSED */
369 static int
cryptof_ioctl(struct file * fp,u_long cmd,void * data,struct ucred * active_cred,struct thread * td)370 cryptof_ioctl(
371 struct file *fp,
372 u_long cmd,
373 void *data,
374 struct ucred *active_cred,
375 struct thread *td)
376 {
377 #define SES2(p) ((struct session2_op *)p)
378 struct cryptoini cria, crie;
379 struct fcrypt *fcr = fp->f_data;
380 struct csession *cse;
381 struct session_op *sop;
382 struct crypt_op *cop;
383 struct crypt_aead *caead;
384 struct enc_xform *txform = NULL;
385 struct auth_hash *thash = NULL;
386 struct crypt_kop *kop;
387 crypto_session_t cses;
388 u_int32_t ses;
389 int error = 0, crid;
390 #ifdef COMPAT_FREEBSD32
391 struct session2_op sopc;
392 struct crypt_op copc;
393 struct crypt_kop kopc;
394 #endif
395 static struct timeval arc4warn, blfwarn, castwarn, deswarn, md5warn;
396 static struct timeval skipwarn, tdeswarn;
397
398 switch (cmd) {
399 case CIOCGSESSION:
400 case CIOCGSESSION2:
401 #ifdef COMPAT_FREEBSD32
402 case CIOCGSESSION32:
403 case CIOCGSESSION232:
404 if (cmd == CIOCGSESSION32) {
405 session_op_from_32(data, (struct session_op *)&sopc);
406 sop = (struct session_op *)&sopc;
407 } else if (cmd == CIOCGSESSION232) {
408 session2_op_from_32(data, &sopc);
409 sop = (struct session_op *)&sopc;
410 } else
411 #endif
412 sop = (struct session_op *)data;
413 switch (sop->cipher) {
414 case 0:
415 break;
416 case CRYPTO_DES_CBC:
417 if (ratecheck(&deswarn, &warninterval))
418 gone_in(13, "DES cipher via /dev/crypto");
419 txform = &enc_xform_des;
420 break;
421 case CRYPTO_3DES_CBC:
422 if (ratecheck(&tdeswarn, &warninterval))
423 gone_in(13, "3DES cipher via /dev/crypto");
424 txform = &enc_xform_3des;
425 break;
426 case CRYPTO_BLF_CBC:
427 if (ratecheck(&blfwarn, &warninterval))
428 gone_in(13, "Blowfish cipher via /dev/crypto");
429 txform = &enc_xform_blf;
430 break;
431 case CRYPTO_CAST_CBC:
432 if (ratecheck(&castwarn, &warninterval))
433 gone_in(13, "CAST128 cipher via /dev/crypto");
434 txform = &enc_xform_cast5;
435 break;
436 case CRYPTO_SKIPJACK_CBC:
437 if (ratecheck(&skipwarn, &warninterval))
438 gone_in(13, "Skipjack cipher via /dev/crypto");
439 txform = &enc_xform_skipjack;
440 break;
441 case CRYPTO_AES_CBC:
442 txform = &enc_xform_rijndael128;
443 break;
444 case CRYPTO_AES_XTS:
445 txform = &enc_xform_aes_xts;
446 break;
447 case CRYPTO_NULL_CBC:
448 txform = &enc_xform_null;
449 break;
450 case CRYPTO_ARC4:
451 if (ratecheck(&arc4warn, &warninterval))
452 gone_in(13, "ARC4 cipher via /dev/crypto");
453 txform = &enc_xform_arc4;
454 break;
455 case CRYPTO_CAMELLIA_CBC:
456 txform = &enc_xform_camellia;
457 break;
458 case CRYPTO_AES_ICM:
459 txform = &enc_xform_aes_icm;
460 break;
461 case CRYPTO_AES_NIST_GCM_16:
462 txform = &enc_xform_aes_nist_gcm;
463 break;
464 case CRYPTO_CHACHA20:
465 txform = &enc_xform_chacha20;
466 break;
467 case CRYPTO_AES_CCM_16:
468 txform = &enc_xform_ccm;
469 break;
470
471 default:
472 CRYPTDEB("invalid cipher");
473 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
474 return (EINVAL);
475 }
476
477 switch (sop->mac) {
478 case 0:
479 break;
480 case CRYPTO_MD5_HMAC:
481 if (ratecheck(&md5warn, &warninterval))
482 gone_in(13,
483 "MD5-HMAC authenticator via /dev/crypto");
484 thash = &auth_hash_hmac_md5;
485 break;
486 case CRYPTO_POLY1305:
487 thash = &auth_hash_poly1305;
488 break;
489 case CRYPTO_SHA1_HMAC:
490 thash = &auth_hash_hmac_sha1;
491 break;
492 case CRYPTO_SHA2_224_HMAC:
493 thash = &auth_hash_hmac_sha2_224;
494 break;
495 case CRYPTO_SHA2_256_HMAC:
496 thash = &auth_hash_hmac_sha2_256;
497 break;
498 case CRYPTO_SHA2_384_HMAC:
499 thash = &auth_hash_hmac_sha2_384;
500 break;
501 case CRYPTO_SHA2_512_HMAC:
502 thash = &auth_hash_hmac_sha2_512;
503 break;
504 case CRYPTO_RIPEMD160_HMAC:
505 thash = &auth_hash_hmac_ripemd_160;
506 break;
507 case CRYPTO_AES_128_NIST_GMAC:
508 thash = &auth_hash_nist_gmac_aes_128;
509 break;
510 case CRYPTO_AES_192_NIST_GMAC:
511 thash = &auth_hash_nist_gmac_aes_192;
512 break;
513 case CRYPTO_AES_256_NIST_GMAC:
514 thash = &auth_hash_nist_gmac_aes_256;
515 break;
516
517 case CRYPTO_AES_CCM_CBC_MAC:
518 switch (sop->keylen) {
519 case 16:
520 thash = &auth_hash_ccm_cbc_mac_128;
521 break;
522 case 24:
523 thash = &auth_hash_ccm_cbc_mac_192;
524 break;
525 case 32:
526 thash = &auth_hash_ccm_cbc_mac_256;
527 break;
528 default:
529 CRYPTDEB("Invalid CBC MAC key size %d",
530 sop->keylen);
531 SDT_PROBE1(opencrypto, dev, ioctl,
532 error, __LINE__);
533 return (EINVAL);
534 }
535 break;
536 #ifdef notdef
537 case CRYPTO_MD5:
538 thash = &auth_hash_md5;
539 break;
540 #endif
541 case CRYPTO_SHA1:
542 thash = &auth_hash_sha1;
543 break;
544 case CRYPTO_SHA2_224:
545 thash = &auth_hash_sha2_224;
546 break;
547 case CRYPTO_SHA2_256:
548 thash = &auth_hash_sha2_256;
549 break;
550 case CRYPTO_SHA2_384:
551 thash = &auth_hash_sha2_384;
552 break;
553 case CRYPTO_SHA2_512:
554 thash = &auth_hash_sha2_512;
555 break;
556
557 case CRYPTO_NULL_HMAC:
558 thash = &auth_hash_null;
559 break;
560
561 case CRYPTO_BLAKE2B:
562 thash = &auth_hash_blake2b;
563 break;
564 case CRYPTO_BLAKE2S:
565 thash = &auth_hash_blake2s;
566 break;
567
568 default:
569 CRYPTDEB("invalid mac");
570 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
571 return (EINVAL);
572 }
573
574 bzero(&crie, sizeof(crie));
575 bzero(&cria, sizeof(cria));
576
577 if (txform) {
578 crie.cri_alg = txform->type;
579 crie.cri_klen = sop->keylen * 8;
580 if (sop->keylen > txform->maxkey ||
581 sop->keylen < txform->minkey) {
582 CRYPTDEB("invalid cipher parameters");
583 error = EINVAL;
584 SDT_PROBE1(opencrypto, dev, ioctl, error,
585 __LINE__);
586 goto bail;
587 }
588
589 crie.cri_key = malloc(crie.cri_klen / 8,
590 M_XDATA, M_WAITOK);
591 if ((error = copyin(sop->key, crie.cri_key,
592 crie.cri_klen / 8))) {
593 CRYPTDEB("invalid key");
594 SDT_PROBE1(opencrypto, dev, ioctl, error,
595 __LINE__);
596 goto bail;
597 }
598 if (thash)
599 crie.cri_next = &cria;
600 }
601
602 if (thash) {
603 cria.cri_alg = thash->type;
604 cria.cri_klen = sop->mackeylen * 8;
605 if (sop->mackeylen > thash->keysize ||
606 sop->mackeylen < 0) {
607 CRYPTDEB("invalid mac key length");
608 error = EINVAL;
609 SDT_PROBE1(opencrypto, dev, ioctl, error,
610 __LINE__);
611 goto bail;
612 }
613
614 if (cria.cri_klen) {
615 cria.cri_key = malloc(cria.cri_klen / 8,
616 M_XDATA, M_WAITOK);
617 if ((error = copyin(sop->mackey, cria.cri_key,
618 cria.cri_klen / 8))) {
619 CRYPTDEB("invalid mac key");
620 SDT_PROBE1(opencrypto, dev, ioctl,
621 error, __LINE__);
622 goto bail;
623 }
624 }
625 }
626
627 /* NB: CIOCGSESSION2 has the crid */
628 if (cmd == CIOCGSESSION2
629 #ifdef COMPAT_FREEBSD32
630 || cmd == CIOCGSESSION232
631 #endif
632 ) {
633 crid = SES2(sop)->crid;
634 error = checkforsoftware(&crid);
635 if (error) {
636 CRYPTDEB("checkforsoftware");
637 SDT_PROBE1(opencrypto, dev, ioctl, error,
638 __LINE__);
639 goto bail;
640 }
641 } else
642 crid = CRYPTOCAP_F_HARDWARE;
643 error = crypto_newsession(&cses, (txform ? &crie : &cria), crid);
644 if (error) {
645 CRYPTDEB("crypto_newsession");
646 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
647 goto bail;
648 }
649
650 cse = csecreate(fcr, cses, crie.cri_key, crie.cri_klen,
651 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
652 thash);
653
654 if (cse == NULL) {
655 crypto_freesession(cses);
656 error = EINVAL;
657 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
658 CRYPTDEB("csecreate");
659 goto bail;
660 }
661 sop->ses = cse->ses;
662 if (cmd == CIOCGSESSION2
663 #ifdef COMPAT_FREEBSD32
664 || cmd == CIOCGSESSION232
665 #endif
666 ) {
667 /* return hardware/driver id */
668 SES2(sop)->crid = crypto_ses2hid(cse->cses);
669 }
670 bail:
671 if (error) {
672 if (crie.cri_key)
673 free(crie.cri_key, M_XDATA);
674 if (cria.cri_key)
675 free(cria.cri_key, M_XDATA);
676 }
677 #ifdef COMPAT_FREEBSD32
678 else {
679 if (cmd == CIOCGSESSION32)
680 session_op_to_32(sop, data);
681 else if (cmd == CIOCGSESSION232)
682 session2_op_to_32((struct session2_op *)sop,
683 data);
684 }
685 #endif
686 break;
687 case CIOCFSESSION:
688 ses = *(u_int32_t *)data;
689 if (!csedelete(fcr, ses)) {
690 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
691 return (EINVAL);
692 }
693 break;
694 case CIOCCRYPT:
695 #ifdef COMPAT_FREEBSD32
696 case CIOCCRYPT32:
697 if (cmd == CIOCCRYPT32) {
698 cop = &copc;
699 crypt_op_from_32(data, cop);
700 } else
701 #endif
702 cop = (struct crypt_op *)data;
703 cse = csefind(fcr, cop->ses);
704 if (cse == NULL) {
705 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
706 return (EINVAL);
707 }
708 error = cryptodev_op(cse, cop, active_cred, td);
709 csefree(cse);
710 #ifdef COMPAT_FREEBSD32
711 if (error == 0 && cmd == CIOCCRYPT32)
712 crypt_op_to_32(cop, data);
713 #endif
714 break;
715 case CIOCKEY:
716 case CIOCKEY2:
717 #ifdef COMPAT_FREEBSD32
718 case CIOCKEY32:
719 case CIOCKEY232:
720 #endif
721 if (!crypto_userasymcrypto) {
722 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
723 return (EPERM); /* XXX compat? */
724 }
725 #ifdef COMPAT_FREEBSD32
726 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
727 kop = &kopc;
728 crypt_kop_from_32(data, kop);
729 } else
730 #endif
731 kop = (struct crypt_kop *)data;
732 if (cmd == CIOCKEY
733 #ifdef COMPAT_FREEBSD32
734 || cmd == CIOCKEY32
735 #endif
736 ) {
737 /* NB: crypto core enforces s/w driver use */
738 kop->crk_crid =
739 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
740 }
741 mtx_lock(&Giant);
742 error = cryptodev_key(kop);
743 mtx_unlock(&Giant);
744 #ifdef COMPAT_FREEBSD32
745 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
746 crypt_kop_to_32(kop, data);
747 #endif
748 break;
749 case CIOCASYMFEAT:
750 if (!crypto_userasymcrypto) {
751 /*
752 * NB: if user asym crypto operations are
753 * not permitted return "no algorithms"
754 * so well-behaved applications will just
755 * fallback to doing them in software.
756 */
757 *(int *)data = 0;
758 } else {
759 error = crypto_getfeat((int *)data);
760 if (error)
761 SDT_PROBE1(opencrypto, dev, ioctl, error,
762 __LINE__);
763 }
764 break;
765 case CIOCFINDDEV:
766 error = cryptodev_find((struct crypt_find_op *)data);
767 break;
768 case CIOCCRYPTAEAD:
769 caead = (struct crypt_aead *)data;
770 cse = csefind(fcr, caead->ses);
771 if (cse == NULL) {
772 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
773 return (EINVAL);
774 }
775 error = cryptodev_aead(cse, caead, active_cred, td);
776 csefree(cse);
777 break;
778 default:
779 error = EINVAL;
780 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
781 break;
782 }
783 return (error);
784 #undef SES2
785 }
786
787 static int cryptodev_cb(struct cryptop *);
788
789 static struct cryptop_data *
cod_alloc(struct csession * cse,size_t len,struct thread * td)790 cod_alloc(struct csession *cse, size_t len, struct thread *td)
791 {
792 struct cryptop_data *cod;
793 struct uio *uio;
794
795 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
796
797 cod->cse = cse;
798 uio = &cod->uio;
799 uio->uio_iov = cod->iovec;
800 uio->uio_iovcnt = 1;
801 uio->uio_resid = len;
802 uio->uio_segflg = UIO_SYSSPACE;
803 uio->uio_rw = UIO_WRITE;
804 uio->uio_td = td;
805 uio->uio_iov[0].iov_len = len;
806 uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
807 return (cod);
808 }
809
810 static void
cod_free(struct cryptop_data * cod)811 cod_free(struct cryptop_data *cod)
812 {
813
814 free(cod->uio.uio_iov[0].iov_base, M_XDATA);
815 free(cod, M_XDATA);
816 }
817
818 static int
cryptodev_op(struct csession * cse,struct crypt_op * cop,struct ucred * active_cred,struct thread * td)819 cryptodev_op(
820 struct csession *cse,
821 struct crypt_op *cop,
822 struct ucred *active_cred,
823 struct thread *td)
824 {
825 struct cryptop_data *cod = NULL;
826 struct cryptop *crp = NULL;
827 struct cryptodesc *crde = NULL, *crda = NULL;
828 int error;
829
830 if (cop->len > 256*1024-4) {
831 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
832 return (E2BIG);
833 }
834
835 if (cse->txform) {
836 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
837 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
838 return (EINVAL);
839 }
840 }
841
842 if (cse->thash)
843 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
844 else
845 cod = cod_alloc(cse, cop->len, td);
846
847 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
848 if (crp == NULL) {
849 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
850 error = ENOMEM;
851 goto bail;
852 }
853
854 if (cse->thash && cse->txform) {
855 if (cop->flags & COP_F_CIPHER_FIRST) {
856 crde = crp->crp_desc;
857 crda = crde->crd_next;
858 } else {
859 crda = crp->crp_desc;
860 crde = crda->crd_next;
861 }
862 } else if (cse->thash) {
863 crda = crp->crp_desc;
864 } else if (cse->txform) {
865 crde = crp->crp_desc;
866 } else {
867 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
868 error = EINVAL;
869 goto bail;
870 }
871
872 if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
873 cop->len))) {
874 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
875 goto bail;
876 }
877
878 if (crda) {
879 crda->crd_skip = 0;
880 crda->crd_len = cop->len;
881 crda->crd_inject = cop->len;
882
883 crda->crd_alg = cse->mac;
884 crda->crd_key = cse->mackey;
885 crda->crd_klen = cse->mackeylen * 8;
886 }
887
888 if (crde) {
889 if (cop->op == COP_ENCRYPT)
890 crde->crd_flags |= CRD_F_ENCRYPT;
891 else
892 crde->crd_flags &= ~CRD_F_ENCRYPT;
893 crde->crd_len = cop->len;
894 crde->crd_inject = 0;
895
896 crde->crd_alg = cse->cipher;
897 crde->crd_key = cse->key;
898 crde->crd_klen = cse->keylen * 8;
899 }
900
901 crp->crp_ilen = cop->len;
902 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
903 | (cop->flags & COP_F_BATCH);
904 crp->crp_uio = &cod->uio;
905 crp->crp_callback = cryptodev_cb;
906 crp->crp_session = cse->cses;
907 crp->crp_opaque = cod;
908
909 if (cop->iv) {
910 if (crde == NULL) {
911 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
912 error = EINVAL;
913 goto bail;
914 }
915 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
916 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
917 error = EINVAL;
918 goto bail;
919 }
920 if ((error = copyin(cop->iv, crde->crd_iv,
921 cse->txform->ivsize))) {
922 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
923 goto bail;
924 }
925 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
926 crde->crd_skip = 0;
927 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
928 crde->crd_skip = 0;
929 } else if (crde) {
930 crde->crd_flags |= CRD_F_IV_PRESENT;
931 crde->crd_skip = cse->txform->ivsize;
932 crde->crd_len -= cse->txform->ivsize;
933 }
934
935 if (cop->mac && crda == NULL) {
936 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
937 error = EINVAL;
938 goto bail;
939 }
940
941 again:
942 /*
943 * Let the dispatch run unlocked, then, interlock against the
944 * callback before checking if the operation completed and going
945 * to sleep. This insures drivers don't inherit our lock which
946 * results in a lock order reversal between crypto_dispatch forced
947 * entry and the crypto_done callback into us.
948 */
949 error = crypto_dispatch(crp);
950 if (error != 0) {
951 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
952 goto bail;
953 }
954
955 mtx_lock(&cse->lock);
956 while (!cod->done)
957 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
958 mtx_unlock(&cse->lock);
959
960 if (crp->crp_etype == EAGAIN) {
961 crp->crp_etype = 0;
962 crp->crp_flags &= ~CRYPTO_F_DONE;
963 cod->done = false;
964 goto again;
965 }
966
967 if (crp->crp_etype != 0) {
968 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
969 error = crp->crp_etype;
970 goto bail;
971 }
972
973 if (cop->dst &&
974 (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
975 cop->len))) {
976 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
977 goto bail;
978 }
979
980 if (cop->mac &&
981 (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
982 cop->mac, cse->thash->hashsize))) {
983 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
984 goto bail;
985 }
986
987 bail:
988 if (crp)
989 crypto_freereq(crp);
990 if (cod)
991 cod_free(cod);
992
993 return (error);
994 }
995
996 static int
cryptodev_aead(struct csession * cse,struct crypt_aead * caead,struct ucred * active_cred,struct thread * td)997 cryptodev_aead(
998 struct csession *cse,
999 struct crypt_aead *caead,
1000 struct ucred *active_cred,
1001 struct thread *td)
1002 {
1003 struct cryptop_data *cod = NULL;
1004 struct cryptop *crp = NULL;
1005 struct cryptodesc *crde = NULL, *crda = NULL;
1006 int error;
1007
1008 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1009 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1010 return (E2BIG);
1011 }
1012
1013 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
1014 (caead->len % cse->txform->blocksize) != 0) {
1015 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1016 return (EINVAL);
1017 }
1018
1019 cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
1020 td);
1021
1022 crp = crypto_getreq(2);
1023 if (crp == NULL) {
1024 error = ENOMEM;
1025 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1026 goto bail;
1027 }
1028
1029 if (caead->flags & COP_F_CIPHER_FIRST) {
1030 crde = crp->crp_desc;
1031 crda = crde->crd_next;
1032 } else {
1033 crda = crp->crp_desc;
1034 crde = crda->crd_next;
1035 }
1036
1037 if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
1038 caead->aadlen))) {
1039 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1040 goto bail;
1041 }
1042
1043 if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
1044 caead->aadlen, caead->len))) {
1045 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1046 goto bail;
1047 }
1048
1049 /*
1050 * For GCM/CCM, crd_len covers only the AAD. For other ciphers
1051 * chained with an HMAC, crd_len covers both the AAD and the
1052 * cipher text.
1053 */
1054 crda->crd_skip = 0;
1055 if (cse->cipher == CRYPTO_AES_NIST_GCM_16 ||
1056 cse->cipher == CRYPTO_AES_CCM_16)
1057 crda->crd_len = caead->aadlen;
1058 else
1059 crda->crd_len = caead->aadlen + caead->len;
1060 crda->crd_inject = caead->aadlen + caead->len;
1061
1062 crda->crd_alg = cse->mac;
1063 crda->crd_key = cse->mackey;
1064 crda->crd_klen = cse->mackeylen * 8;
1065
1066 if (caead->op == COP_ENCRYPT)
1067 crde->crd_flags |= CRD_F_ENCRYPT;
1068 else
1069 crde->crd_flags &= ~CRD_F_ENCRYPT;
1070 crde->crd_skip = caead->aadlen;
1071 crde->crd_len = caead->len;
1072 crde->crd_inject = caead->aadlen;
1073
1074 crde->crd_alg = cse->cipher;
1075 crde->crd_key = cse->key;
1076 crde->crd_klen = cse->keylen * 8;
1077
1078 crp->crp_ilen = caead->aadlen + caead->len;
1079 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1080 | (caead->flags & COP_F_BATCH);
1081 crp->crp_uio = &cod->uio;
1082 crp->crp_callback = cryptodev_cb;
1083 crp->crp_session = cse->cses;
1084 crp->crp_opaque = cod;
1085
1086 if (caead->iv) {
1087 if (caead->ivlen > sizeof(crde->crd_iv)) {
1088 error = EINVAL;
1089 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1090 goto bail;
1091 }
1092
1093 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1094 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1095 goto bail;
1096 }
1097 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1098 } else {
1099 crde->crd_flags |= CRD_F_IV_PRESENT;
1100 crde->crd_skip += cse->txform->ivsize;
1101 crde->crd_len -= cse->txform->ivsize;
1102 }
1103
1104 if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1105 caead->len + caead->aadlen, cse->thash->hashsize))) {
1106 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1107 goto bail;
1108 }
1109 again:
1110 /*
1111 * Let the dispatch run unlocked, then, interlock against the
1112 * callback before checking if the operation completed and going
1113 * to sleep. This insures drivers don't inherit our lock which
1114 * results in a lock order reversal between crypto_dispatch forced
1115 * entry and the crypto_done callback into us.
1116 */
1117 error = crypto_dispatch(crp);
1118 if (error != 0) {
1119 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1120 goto bail;
1121 }
1122
1123 mtx_lock(&cse->lock);
1124 while (!cod->done)
1125 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1126 mtx_unlock(&cse->lock);
1127
1128 if (crp->crp_etype == EAGAIN) {
1129 crp->crp_etype = 0;
1130 crp->crp_flags &= ~CRYPTO_F_DONE;
1131 cod->done = false;
1132 goto again;
1133 }
1134
1135 if (crp->crp_etype != 0) {
1136 error = crp->crp_etype;
1137 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1138 goto bail;
1139 }
1140
1141 if (caead->dst && (error = copyout(
1142 (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1143 caead->len))) {
1144 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1145 goto bail;
1146 }
1147
1148 if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1149 caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1150 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1151 goto bail;
1152 }
1153
1154 bail:
1155 crypto_freereq(crp);
1156 if (cod)
1157 cod_free(cod);
1158
1159 return (error);
1160 }
1161
1162 static int
cryptodev_cb(struct cryptop * crp)1163 cryptodev_cb(struct cryptop *crp)
1164 {
1165 struct cryptop_data *cod = crp->crp_opaque;
1166
1167 /*
1168 * Lock to ensure the wakeup() is not missed by the loops
1169 * waiting on cod->done in cryptodev_op() and
1170 * cryptodev_aead().
1171 */
1172 mtx_lock(&cod->cse->lock);
1173 cod->done = true;
1174 mtx_unlock(&cod->cse->lock);
1175 wakeup(cod);
1176 return (0);
1177 }
1178
1179 static int
cryptodevkey_cb(void * op)1180 cryptodevkey_cb(void *op)
1181 {
1182 struct cryptkop *krp = (struct cryptkop *) op;
1183
1184 wakeup_one(krp);
1185 return (0);
1186 }
1187
1188 static int
cryptodev_key(struct crypt_kop * kop)1189 cryptodev_key(struct crypt_kop *kop)
1190 {
1191 struct cryptkop *krp = NULL;
1192 int error = EINVAL;
1193 int in, out, size, i;
1194
1195 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1196 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1197 return (EFBIG);
1198 }
1199
1200 in = kop->crk_iparams;
1201 out = kop->crk_oparams;
1202 switch (kop->crk_op) {
1203 case CRK_MOD_EXP:
1204 if (in == 3 && out == 1)
1205 break;
1206 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1207 return (EINVAL);
1208 case CRK_MOD_EXP_CRT:
1209 if (in == 6 && out == 1)
1210 break;
1211 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1212 return (EINVAL);
1213 case CRK_DSA_SIGN:
1214 if (in == 5 && out == 2)
1215 break;
1216 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1217 return (EINVAL);
1218 case CRK_DSA_VERIFY:
1219 if (in == 7 && out == 0)
1220 break;
1221 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1222 return (EINVAL);
1223 case CRK_DH_COMPUTE_KEY:
1224 if (in == 3 && out == 1)
1225 break;
1226 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1227 return (EINVAL);
1228 default:
1229 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1230 return (EINVAL);
1231 }
1232
1233 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1234 if (!krp) {
1235 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1236 return (ENOMEM);
1237 }
1238 krp->krp_op = kop->crk_op;
1239 krp->krp_status = kop->crk_status;
1240 krp->krp_iparams = kop->crk_iparams;
1241 krp->krp_oparams = kop->crk_oparams;
1242 krp->krp_crid = kop->crk_crid;
1243 krp->krp_status = 0;
1244 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1245
1246 for (i = 0; i < CRK_MAXPARAM; i++) {
1247 if (kop->crk_param[i].crp_nbits > 65536) {
1248 /* Limit is the same as in OpenBSD */
1249 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1250 goto fail;
1251 }
1252 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1253 }
1254 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1255 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1256 if (size == 0)
1257 continue;
1258 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1259 if (i >= krp->krp_iparams)
1260 continue;
1261 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1262 if (error) {
1263 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1264 goto fail;
1265 }
1266 }
1267
1268 error = crypto_kdispatch(krp);
1269 if (error) {
1270 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1271 goto fail;
1272 }
1273 error = tsleep(krp, PSOCK, "crydev", 0);
1274 if (error) {
1275 /* XXX can this happen? if so, how do we recover? */
1276 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1277 goto fail;
1278 }
1279
1280 kop->crk_crid = krp->krp_crid; /* device that did the work */
1281 if (krp->krp_status != 0) {
1282 error = krp->krp_status;
1283 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1284 goto fail;
1285 }
1286
1287 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1288 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1289 if (size == 0)
1290 continue;
1291 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1292 if (error) {
1293 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1294 goto fail;
1295 }
1296 }
1297
1298 fail:
1299 if (krp) {
1300 kop->crk_status = krp->krp_status;
1301 for (i = 0; i < CRK_MAXPARAM; i++) {
1302 if (krp->krp_param[i].crp_p)
1303 free(krp->krp_param[i].crp_p, M_XDATA);
1304 }
1305 free(krp, M_XDATA);
1306 }
1307 return (error);
1308 }
1309
1310 static int
cryptodev_find(struct crypt_find_op * find)1311 cryptodev_find(struct crypt_find_op *find)
1312 {
1313 device_t dev;
1314 size_t fnlen = sizeof find->name;
1315
1316 if (find->crid != -1) {
1317 dev = crypto_find_device_byhid(find->crid);
1318 if (dev == NULL)
1319 return (ENOENT);
1320 strncpy(find->name, device_get_nameunit(dev), fnlen);
1321 find->name[fnlen - 1] = '\x0';
1322 } else {
1323 find->name[fnlen - 1] = '\x0';
1324 find->crid = crypto_find_driver(find->name);
1325 if (find->crid == -1)
1326 return (ENOENT);
1327 }
1328 return (0);
1329 }
1330
1331 /* ARGSUSED */
1332 static int
cryptof_stat(struct file * fp,struct stat * sb,struct ucred * active_cred,struct thread * td)1333 cryptof_stat(
1334 struct file *fp,
1335 struct stat *sb,
1336 struct ucred *active_cred,
1337 struct thread *td)
1338 {
1339
1340 return (EOPNOTSUPP);
1341 }
1342
1343 /* ARGSUSED */
1344 static int
cryptof_close(struct file * fp,struct thread * td)1345 cryptof_close(struct file *fp, struct thread *td)
1346 {
1347 struct fcrypt *fcr = fp->f_data;
1348 struct csession *cse;
1349
1350 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1351 TAILQ_REMOVE(&fcr->csessions, cse, next);
1352 KASSERT(cse->refs == 1,
1353 ("%s: crypto session %p with %d refs", __func__, cse,
1354 cse->refs));
1355 csefree(cse);
1356 }
1357 free(fcr, M_XDATA);
1358 fp->f_data = NULL;
1359 return 0;
1360 }
1361
1362 static int
cryptof_fill_kinfo(struct file * fp,struct kinfo_file * kif,struct filedesc * fdp)1363 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1364 {
1365
1366 kif->kf_type = KF_TYPE_CRYPTO;
1367 return (0);
1368 }
1369
1370 static struct csession *
csefind(struct fcrypt * fcr,u_int ses)1371 csefind(struct fcrypt *fcr, u_int ses)
1372 {
1373 struct csession *cse;
1374
1375 mtx_lock(&fcr->lock);
1376 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1377 if (cse->ses == ses) {
1378 refcount_acquire(&cse->refs);
1379 mtx_unlock(&fcr->lock);
1380 return (cse);
1381 }
1382 }
1383 mtx_unlock(&fcr->lock);
1384 return (NULL);
1385 }
1386
1387 static bool
csedelete(struct fcrypt * fcr,u_int ses)1388 csedelete(struct fcrypt *fcr, u_int ses)
1389 {
1390 struct csession *cse;
1391
1392 mtx_lock(&fcr->lock);
1393 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1394 if (cse->ses == ses) {
1395 TAILQ_REMOVE(&fcr->csessions, cse, next);
1396 mtx_unlock(&fcr->lock);
1397 csefree(cse);
1398 return (true);
1399 }
1400 }
1401 mtx_unlock(&fcr->lock);
1402 return (false);
1403 }
1404
1405 struct csession *
csecreate(struct fcrypt * fcr,crypto_session_t cses,caddr_t key,u_int64_t keylen,caddr_t mackey,u_int64_t mackeylen,u_int32_t cipher,u_int32_t mac,struct enc_xform * txform,struct auth_hash * thash)1406 csecreate(struct fcrypt *fcr, crypto_session_t cses, caddr_t key, u_int64_t keylen,
1407 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1408 struct enc_xform *txform, struct auth_hash *thash)
1409 {
1410 struct csession *cse;
1411
1412 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1413 if (cse == NULL)
1414 return NULL;
1415 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1416 refcount_init(&cse->refs, 1);
1417 cse->key = key;
1418 cse->keylen = keylen/8;
1419 cse->mackey = mackey;
1420 cse->mackeylen = mackeylen/8;
1421 cse->cses = cses;
1422 cse->cipher = cipher;
1423 cse->mac = mac;
1424 cse->txform = txform;
1425 cse->thash = thash;
1426 mtx_lock(&fcr->lock);
1427 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1428 cse->ses = fcr->sesn++;
1429 mtx_unlock(&fcr->lock);
1430 return (cse);
1431 }
1432
1433 static void
csefree(struct csession * cse)1434 csefree(struct csession *cse)
1435 {
1436
1437 if (!refcount_release(&cse->refs))
1438 return;
1439 crypto_freesession(cse->cses);
1440 mtx_destroy(&cse->lock);
1441 if (cse->key)
1442 free(cse->key, M_XDATA);
1443 if (cse->mackey)
1444 free(cse->mackey, M_XDATA);
1445 free(cse, M_XDATA);
1446 }
1447
1448 static int
cryptoopen(struct cdev * dev,int oflags,int devtype,struct thread * td)1449 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1450 {
1451 return (0);
1452 }
1453
1454 static int
cryptoread(struct cdev * dev,struct uio * uio,int ioflag)1455 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1456 {
1457 return (EIO);
1458 }
1459
1460 static int
cryptowrite(struct cdev * dev,struct uio * uio,int ioflag)1461 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1462 {
1463 return (EIO);
1464 }
1465
1466 static int
cryptoioctl(struct cdev * dev,u_long cmd,caddr_t data,int flag,struct thread * td)1467 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1468 {
1469 struct file *f;
1470 struct fcrypt *fcr;
1471 int fd, error;
1472
1473 switch (cmd) {
1474 case CRIOGET:
1475 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1476 TAILQ_INIT(&fcr->csessions);
1477 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1478
1479 error = falloc(td, &f, &fd, 0);
1480
1481 if (error) {
1482 mtx_destroy(&fcr->lock);
1483 free(fcr, M_XDATA);
1484 return (error);
1485 }
1486 /* falloc automatically provides an extra reference to 'f'. */
1487 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1488 *(u_int32_t *)data = fd;
1489 fdrop(f, td);
1490 break;
1491 case CRIOFINDDEV:
1492 error = cryptodev_find((struct crypt_find_op *)data);
1493 break;
1494 case CRIOASYMFEAT:
1495 error = crypto_getfeat((int *)data);
1496 break;
1497 default:
1498 error = EINVAL;
1499 break;
1500 }
1501 return (error);
1502 }
1503
1504 static struct cdevsw crypto_cdevsw = {
1505 .d_version = D_VERSION,
1506 .d_flags = D_NEEDGIANT,
1507 .d_open = cryptoopen,
1508 .d_read = cryptoread,
1509 .d_write = cryptowrite,
1510 .d_ioctl = cryptoioctl,
1511 .d_name = "crypto",
1512 };
1513 static struct cdev *crypto_dev;
1514
1515 /*
1516 * Initialization code, both for static and dynamic loading.
1517 */
1518 static int
cryptodev_modevent(module_t mod,int type,void * unused)1519 cryptodev_modevent(module_t mod, int type, void *unused)
1520 {
1521 switch (type) {
1522 case MOD_LOAD:
1523 if (bootverbose)
1524 printf("crypto: <crypto device>\n");
1525 crypto_dev = make_dev(&crypto_cdevsw, 0,
1526 UID_ROOT, GID_WHEEL, 0666,
1527 "crypto");
1528 return 0;
1529 case MOD_UNLOAD:
1530 /*XXX disallow if active sessions */
1531 destroy_dev(crypto_dev);
1532 return 0;
1533 }
1534 return EINVAL;
1535 }
1536
1537 static moduledata_t cryptodev_mod = {
1538 "cryptodev",
1539 cryptodev_modevent,
1540 0
1541 };
1542 MODULE_VERSION(cryptodev, 1);
1543 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1544 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1545 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
1546