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/proc.h>
51 #include <sys/sysctl.h>
52 #include <sys/errno.h>
53 #include <sys/random.h>
54 #include <sys/conf.h>
55 #include <sys/kernel.h>
56 #include <sys/module.h>
57 #include <sys/fcntl.h>
58 #include <sys/bus.h>
59 #include <sys/sdt.h>
60 #include <sys/syscallsubr.h>
61
62 #include <opencrypto/cryptodev.h>
63 #include <opencrypto/xform.h>
64
65 SDT_PROVIDER_DECLARE(opencrypto);
66
67 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
68
69 #ifdef COMPAT_FREEBSD12
70 /*
71 * Previously, most ioctls were performed against a cloned descriptor
72 * of /dev/crypto obtained via CRIOGET. Now all ioctls are performed
73 * against /dev/crypto directly.
74 */
75 #define CRIOGET _IOWR('c', 100, uint32_t)
76 #endif
77
78 /* the following are done against the cloned descriptor */
79
80 #ifdef COMPAT_FREEBSD32
81 #include <sys/mount.h>
82 #include <compat/freebsd32/freebsd32.h>
83
84 struct session_op32 {
85 uint32_t cipher;
86 uint32_t mac;
87 uint32_t keylen;
88 uint32_t key;
89 int mackeylen;
90 uint32_t mackey;
91 uint32_t ses;
92 };
93
94 struct session2_op32 {
95 uint32_t cipher;
96 uint32_t mac;
97 uint32_t keylen;
98 uint32_t key;
99 int mackeylen;
100 uint32_t mackey;
101 uint32_t ses;
102 int crid;
103 int pad[4];
104 };
105
106 struct crypt_op32 {
107 uint32_t ses;
108 uint16_t op;
109 uint16_t flags;
110 u_int len;
111 uint32_t src, dst;
112 uint32_t mac;
113 uint32_t iv;
114 };
115
116 struct crypt_aead32 {
117 uint32_t ses;
118 uint16_t op;
119 uint16_t flags;
120 u_int len;
121 u_int aadlen;
122 u_int ivlen;
123 uint32_t src;
124 uint32_t dst;
125 uint32_t aad;
126 uint32_t tag;
127 uint32_t iv;
128 };
129
130 struct crparam32 {
131 uint32_t crp_p;
132 u_int crp_nbits;
133 };
134
135 struct crypt_kop32 {
136 u_int crk_op;
137 u_int crk_status;
138 u_short crk_iparams;
139 u_short crk_oparams;
140 u_int crk_crid;
141 struct crparam32 crk_param[CRK_MAXPARAM];
142 };
143
144 #define CIOCGSESSION32 _IOWR('c', 101, struct session_op32)
145 #define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32)
146 #define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32)
147 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
148 #define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32)
149 #define CIOCCRYPTAEAD32 _IOWR('c', 109, struct crypt_aead32)
150
151 static void
152 session_op_from_32(const struct session_op32 *from, struct session2_op *to)
153 {
154
155 memset(to, 0, sizeof(*to));
156 CP(*from, *to, cipher);
157 CP(*from, *to, mac);
158 CP(*from, *to, keylen);
159 PTRIN_CP(*from, *to, key);
160 CP(*from, *to, mackeylen);
161 PTRIN_CP(*from, *to, mackey);
162 CP(*from, *to, ses);
163 to->crid = CRYPTOCAP_F_HARDWARE;
164 }
165
166 static void
167 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
168 {
169
170 session_op_from_32((const struct session_op32 *)from, to);
171 CP(*from, *to, crid);
172 }
173
174 static void
175 session_op_to_32(const struct session2_op *from, struct session_op32 *to)
176 {
177
178 CP(*from, *to, cipher);
179 CP(*from, *to, mac);
180 CP(*from, *to, keylen);
181 PTROUT_CP(*from, *to, key);
182 CP(*from, *to, mackeylen);
183 PTROUT_CP(*from, *to, mackey);
184 CP(*from, *to, ses);
185 }
186
187 static void
188 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
189 {
190
191 session_op_to_32(from, (struct session_op32 *)to);
192 CP(*from, *to, crid);
193 }
194
195 static void
196 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
197 {
198
199 CP(*from, *to, ses);
200 CP(*from, *to, op);
201 CP(*from, *to, flags);
202 CP(*from, *to, len);
203 PTRIN_CP(*from, *to, src);
204 PTRIN_CP(*from, *to, dst);
205 PTRIN_CP(*from, *to, mac);
206 PTRIN_CP(*from, *to, iv);
207 }
208
209 static void
210 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
211 {
212
213 CP(*from, *to, ses);
214 CP(*from, *to, op);
215 CP(*from, *to, flags);
216 CP(*from, *to, len);
217 PTROUT_CP(*from, *to, src);
218 PTROUT_CP(*from, *to, dst);
219 PTROUT_CP(*from, *to, mac);
220 PTROUT_CP(*from, *to, iv);
221 }
222
223 static void
224 crypt_aead_from_32(const struct crypt_aead32 *from, struct crypt_aead *to)
225 {
226
227 CP(*from, *to, ses);
228 CP(*from, *to, op);
229 CP(*from, *to, flags);
230 CP(*from, *to, len);
231 CP(*from, *to, aadlen);
232 CP(*from, *to, ivlen);
233 PTRIN_CP(*from, *to, src);
234 PTRIN_CP(*from, *to, dst);
235 PTRIN_CP(*from, *to, aad);
236 PTRIN_CP(*from, *to, tag);
237 PTRIN_CP(*from, *to, iv);
238 }
239
240 static void
241 crypt_aead_to_32(const struct crypt_aead *from, struct crypt_aead32 *to)
242 {
243
244 CP(*from, *to, ses);
245 CP(*from, *to, op);
246 CP(*from, *to, flags);
247 CP(*from, *to, len);
248 CP(*from, *to, aadlen);
249 CP(*from, *to, ivlen);
250 PTROUT_CP(*from, *to, src);
251 PTROUT_CP(*from, *to, dst);
252 PTROUT_CP(*from, *to, aad);
253 PTROUT_CP(*from, *to, tag);
254 PTROUT_CP(*from, *to, iv);
255 }
256
257 static void
258 crparam_from_32(const struct crparam32 *from, struct crparam *to)
259 {
260
261 PTRIN_CP(*from, *to, crp_p);
262 CP(*from, *to, crp_nbits);
263 }
264
265 static void
266 crparam_to_32(const struct crparam *from, struct crparam32 *to)
267 {
268
269 PTROUT_CP(*from, *to, crp_p);
270 CP(*from, *to, crp_nbits);
271 }
272
273 static void
274 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
275 {
276 int i;
277
278 CP(*from, *to, crk_op);
279 CP(*from, *to, crk_status);
280 CP(*from, *to, crk_iparams);
281 CP(*from, *to, crk_oparams);
282 CP(*from, *to, crk_crid);
283 for (i = 0; i < CRK_MAXPARAM; i++)
284 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
285 }
286
287 static void
288 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
289 {
290 int i;
291
292 CP(*from, *to, crk_op);
293 CP(*from, *to, crk_status);
294 CP(*from, *to, crk_iparams);
295 CP(*from, *to, crk_oparams);
296 CP(*from, *to, crk_crid);
297 for (i = 0; i < CRK_MAXPARAM; i++)
298 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
299 }
300 #endif
301
302 static void
303 session2_op_from_op(const struct session_op *from, struct session2_op *to)
304 {
305
306 memset(to, 0, sizeof(*to));
307 memcpy(to, from, sizeof(*from));
308 to->crid = CRYPTOCAP_F_HARDWARE;
309 }
310
311 static void
312 session2_op_to_op(const struct session2_op *from, struct session_op *to)
313 {
314
315 memcpy(to, from, sizeof(*to));
316 }
317
318 struct csession {
319 TAILQ_ENTRY(csession) next;
320 crypto_session_t cses;
321 volatile u_int refs;
322 uint32_t ses;
323 struct mtx lock; /* for op submission */
324
325 struct enc_xform *txform;
326 int hashsize;
327 int ivsize;
328 int mode;
329
330 void *key;
331 void *mackey;
332 };
333
334 struct cryptop_data {
335 struct csession *cse;
336
337 char *buf;
338 char *obuf;
339 char *aad;
340 bool done;
341 };
342
343 struct fcrypt {
344 TAILQ_HEAD(csessionlist, csession) csessions;
345 int sesn;
346 struct mtx lock;
347 };
348
349 static bool use_outputbuffers;
350 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_use_output, CTLFLAG_RW,
351 &use_outputbuffers, 0,
352 "Use separate output buffers for /dev/crypto requests.");
353
354 static bool use_separate_aad;
355 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_separate_aad, CTLFLAG_RW,
356 &use_separate_aad, 0,
357 "Use separate AAD buffer for /dev/crypto requests.");
358
359 static struct timeval warninterval = { .tv_sec = 60, .tv_usec = 0 };
360 SYSCTL_TIMEVAL_SEC(_kern, OID_AUTO, cryptodev_warn_interval, CTLFLAG_RW,
361 &warninterval,
362 "Delay in seconds between warnings of deprecated /dev/crypto algorithms");
363
364 /*
365 * Check a crypto identifier to see if it requested
366 * a software device/driver. This can be done either
367 * by device name/class or through search constraints.
368 */
369 static int
370 checkforsoftware(int *cridp)
371 {
372 int crid;
373
374 crid = *cridp;
375
376 if (!crypto_devallowsoft) {
377 if (crid & CRYPTOCAP_F_SOFTWARE) {
378 if (crid & CRYPTOCAP_F_HARDWARE) {
379 *cridp = CRYPTOCAP_F_HARDWARE;
380 return 0;
381 }
382 return EINVAL;
383 }
384 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
385 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
386 return EINVAL;
387 }
388 return 0;
389 }
390
391 static int
392 cse_create(struct fcrypt *fcr, struct session2_op *sop)
393 {
394 struct crypto_session_params csp;
395 struct csession *cse;
396 struct enc_xform *txform;
397 struct auth_hash *thash;
398 void *key = NULL;
399 void *mackey = NULL;
400 crypto_session_t cses;
401 int crid, error;
402
403 switch (sop->cipher) {
404 case 0:
405 txform = NULL;
406 break;
407 case CRYPTO_AES_CBC:
408 txform = &enc_xform_rijndael128;
409 break;
410 case CRYPTO_AES_XTS:
411 txform = &enc_xform_aes_xts;
412 break;
413 case CRYPTO_NULL_CBC:
414 txform = &enc_xform_null;
415 break;
416 case CRYPTO_CAMELLIA_CBC:
417 txform = &enc_xform_camellia;
418 break;
419 case CRYPTO_AES_ICM:
420 txform = &enc_xform_aes_icm;
421 break;
422 case CRYPTO_AES_NIST_GCM_16:
423 txform = &enc_xform_aes_nist_gcm;
424 break;
425 case CRYPTO_CHACHA20:
426 txform = &enc_xform_chacha20;
427 break;
428 case CRYPTO_AES_CCM_16:
429 txform = &enc_xform_ccm;
430 break;
431 default:
432 CRYPTDEB("invalid cipher");
433 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
434 return (EINVAL);
435 }
436
437 switch (sop->mac) {
438 case 0:
439 thash = NULL;
440 break;
441 case CRYPTO_POLY1305:
442 thash = &auth_hash_poly1305;
443 break;
444 case CRYPTO_SHA1_HMAC:
445 thash = &auth_hash_hmac_sha1;
446 break;
447 case CRYPTO_SHA2_224_HMAC:
448 thash = &auth_hash_hmac_sha2_224;
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 COMPAT_FREEBSD12
463 case CRYPTO_AES_128_NIST_GMAC:
464 case CRYPTO_AES_192_NIST_GMAC:
465 case CRYPTO_AES_256_NIST_GMAC:
466 /* Should always be paired with GCM. */
467 if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
468 CRYPTDEB("GMAC without GCM");
469 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
470 return (EINVAL);
471 }
472 break;
473 #endif
474 case CRYPTO_AES_NIST_GMAC:
475 switch (sop->mackeylen * 8) {
476 case 128:
477 thash = &auth_hash_nist_gmac_aes_128;
478 break;
479 case 192:
480 thash = &auth_hash_nist_gmac_aes_192;
481 break;
482 case 256:
483 thash = &auth_hash_nist_gmac_aes_256;
484 break;
485 default:
486 CRYPTDEB("invalid GMAC key length");
487 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
488 return (EINVAL);
489 }
490 break;
491 case CRYPTO_AES_CCM_CBC_MAC:
492 switch (sop->mackeylen) {
493 case 16:
494 thash = &auth_hash_ccm_cbc_mac_128;
495 break;
496 case 24:
497 thash = &auth_hash_ccm_cbc_mac_192;
498 break;
499 case 32:
500 thash = &auth_hash_ccm_cbc_mac_256;
501 break;
502 default:
503 CRYPTDEB("Invalid CBC MAC key size %d", sop->keylen);
504 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
505 return (EINVAL);
506 }
507 break;
508 case CRYPTO_SHA1:
509 thash = &auth_hash_sha1;
510 break;
511 case CRYPTO_SHA2_224:
512 thash = &auth_hash_sha2_224;
513 break;
514 case CRYPTO_SHA2_256:
515 thash = &auth_hash_sha2_256;
516 break;
517 case CRYPTO_SHA2_384:
518 thash = &auth_hash_sha2_384;
519 break;
520 case CRYPTO_SHA2_512:
521 thash = &auth_hash_sha2_512;
522 break;
523
524 case CRYPTO_NULL_HMAC:
525 thash = &auth_hash_null;
526 break;
527
528 case CRYPTO_BLAKE2B:
529 thash = &auth_hash_blake2b;
530 break;
531 case CRYPTO_BLAKE2S:
532 thash = &auth_hash_blake2s;
533 break;
534
535 default:
536 CRYPTDEB("invalid mac");
537 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
538 return (EINVAL);
539 }
540
541 if (txform == NULL && thash == NULL) {
542 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
543 return (EINVAL);
544 }
545
546 memset(&csp, 0, sizeof(csp));
547 if (use_outputbuffers)
548 csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
549
550 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
551 switch (sop->mac) {
552 #ifdef COMPAT_FREEBSD12
553 case CRYPTO_AES_128_NIST_GMAC:
554 case CRYPTO_AES_192_NIST_GMAC:
555 case CRYPTO_AES_256_NIST_GMAC:
556 if (sop->keylen != sop->mackeylen) {
557 SDT_PROBE1(opencrypto, dev, ioctl, error,
558 __LINE__);
559 return (EINVAL);
560 }
561 break;
562 #endif
563 case 0:
564 break;
565 default:
566 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
567 return (EINVAL);
568 }
569 csp.csp_mode = CSP_MODE_AEAD;
570 } else if (sop->cipher == CRYPTO_AES_CCM_16) {
571 switch (sop->mac) {
572 #ifdef COMPAT_FREEBSD12
573 case CRYPTO_AES_CCM_CBC_MAC:
574 if (sop->keylen != sop->mackeylen) {
575 SDT_PROBE1(opencrypto, dev, ioctl, error,
576 __LINE__);
577 return (EINVAL);
578 }
579 thash = NULL;
580 break;
581 #endif
582 case 0:
583 break;
584 default:
585 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
586 return (EINVAL);
587 }
588 csp.csp_mode = CSP_MODE_AEAD;
589 } else if (txform != NULL && thash != NULL)
590 csp.csp_mode = CSP_MODE_ETA;
591 else if (txform != NULL)
592 csp.csp_mode = CSP_MODE_CIPHER;
593 else
594 csp.csp_mode = CSP_MODE_DIGEST;
595
596 switch (csp.csp_mode) {
597 case CSP_MODE_AEAD:
598 case CSP_MODE_ETA:
599 if (use_separate_aad)
600 csp.csp_flags |= CSP_F_SEPARATE_AAD;
601 break;
602 }
603
604 if (txform != NULL) {
605 csp.csp_cipher_alg = txform->type;
606 csp.csp_cipher_klen = sop->keylen;
607 if (sop->keylen > txform->maxkey ||
608 sop->keylen < txform->minkey) {
609 CRYPTDEB("invalid cipher parameters");
610 error = EINVAL;
611 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
612 goto bail;
613 }
614
615 key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK);
616 error = copyin(sop->key, key, csp.csp_cipher_klen);
617 if (error) {
618 CRYPTDEB("invalid key");
619 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
620 goto bail;
621 }
622 csp.csp_cipher_key = key;
623 csp.csp_ivlen = txform->ivsize;
624 }
625
626 if (thash != NULL) {
627 csp.csp_auth_alg = thash->type;
628 csp.csp_auth_klen = sop->mackeylen;
629 if (sop->mackeylen > thash->keysize || sop->mackeylen < 0) {
630 CRYPTDEB("invalid mac key length");
631 error = EINVAL;
632 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
633 goto bail;
634 }
635
636 if (csp.csp_auth_klen != 0) {
637 mackey = malloc(csp.csp_auth_klen, M_XDATA, M_WAITOK);
638 error = copyin(sop->mackey, mackey, csp.csp_auth_klen);
639 if (error) {
640 CRYPTDEB("invalid mac key");
641 SDT_PROBE1(opencrypto, dev, ioctl, error,
642 __LINE__);
643 goto bail;
644 }
645 csp.csp_auth_key = mackey;
646 }
647
648 if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
649 csp.csp_ivlen = AES_GCM_IV_LEN;
650 if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
651 csp.csp_ivlen = AES_CCM_IV_LEN;
652 }
653
654 crid = sop->crid;
655 error = checkforsoftware(&crid);
656 if (error) {
657 CRYPTDEB("checkforsoftware");
658 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
659 goto bail;
660 }
661 error = crypto_newsession(&cses, &csp, crid);
662 if (error) {
663 CRYPTDEB("crypto_newsession");
664 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
665 goto bail;
666 }
667
668 cse = malloc(sizeof(struct csession), M_XDATA, M_WAITOK | M_ZERO);
669 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
670 refcount_init(&cse->refs, 1);
671 cse->key = key;
672 cse->mackey = mackey;
673 cse->mode = csp.csp_mode;
674 cse->cses = cses;
675 cse->txform = txform;
676 if (thash != NULL)
677 cse->hashsize = thash->hashsize;
678 else if (csp.csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
679 cse->hashsize = AES_GMAC_HASH_LEN;
680 else if (csp.csp_cipher_alg == CRYPTO_AES_CCM_16)
681 cse->hashsize = AES_CBC_MAC_HASH_LEN;
682 cse->ivsize = csp.csp_ivlen;
683
684 mtx_lock(&fcr->lock);
685 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
686 cse->ses = fcr->sesn++;
687 mtx_unlock(&fcr->lock);
688
689 sop->ses = cse->ses;
690
691 /* return hardware/driver id */
692 sop->crid = crypto_ses2hid(cse->cses);
693 bail:
694 if (error) {
695 free(key, M_XDATA);
696 free(mackey, M_XDATA);
697 }
698 return (error);
699 }
700
701 static struct csession *
702 cse_find(struct fcrypt *fcr, u_int ses)
703 {
704 struct csession *cse;
705
706 mtx_lock(&fcr->lock);
707 TAILQ_FOREACH(cse, &fcr->csessions, next) {
708 if (cse->ses == ses) {
709 refcount_acquire(&cse->refs);
710 mtx_unlock(&fcr->lock);
711 return (cse);
712 }
713 }
714 mtx_unlock(&fcr->lock);
715 return (NULL);
716 }
717
718 static void
719 cse_free(struct csession *cse)
720 {
721
722 if (!refcount_release(&cse->refs))
723 return;
724 crypto_freesession(cse->cses);
725 mtx_destroy(&cse->lock);
726 if (cse->key)
727 free(cse->key, M_XDATA);
728 if (cse->mackey)
729 free(cse->mackey, M_XDATA);
730 free(cse, M_XDATA);
731 }
732
733 static bool
734 cse_delete(struct fcrypt *fcr, u_int ses)
735 {
736 struct csession *cse;
737
738 mtx_lock(&fcr->lock);
739 TAILQ_FOREACH(cse, &fcr->csessions, next) {
740 if (cse->ses == ses) {
741 TAILQ_REMOVE(&fcr->csessions, cse, next);
742 mtx_unlock(&fcr->lock);
743 cse_free(cse);
744 return (true);
745 }
746 }
747 mtx_unlock(&fcr->lock);
748 return (false);
749 }
750
751 static struct cryptop_data *
752 cod_alloc(struct csession *cse, size_t aad_len, size_t len)
753 {
754 struct cryptop_data *cod;
755
756 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
757
758 cod->cse = cse;
759 if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_AAD) {
760 if (aad_len != 0)
761 cod->aad = malloc(aad_len, M_XDATA, M_WAITOK);
762 cod->buf = malloc(len, M_XDATA, M_WAITOK);
763 } else
764 cod->buf = malloc(aad_len + len, M_XDATA, M_WAITOK);
765 if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
766 cod->obuf = malloc(len, M_XDATA, M_WAITOK);
767 return (cod);
768 }
769
770 static void
771 cod_free(struct cryptop_data *cod)
772 {
773
774 free(cod->aad, M_XDATA);
775 free(cod->obuf, M_XDATA);
776 free(cod->buf, M_XDATA);
777 free(cod, M_XDATA);
778 }
779
780 static int
781 cryptodev_cb(struct cryptop *crp)
782 {
783 struct cryptop_data *cod = crp->crp_opaque;
784
785 /*
786 * Lock to ensure the wakeup() is not missed by the loops
787 * waiting on cod->done in cryptodev_op() and
788 * cryptodev_aead().
789 */
790 mtx_lock(&cod->cse->lock);
791 cod->done = true;
792 mtx_unlock(&cod->cse->lock);
793 wakeup(cod);
794 return (0);
795 }
796
797 static int
798 cryptodev_op(struct csession *cse, const struct crypt_op *cop)
799 {
800 struct cryptop_data *cod = NULL;
801 struct cryptop *crp = NULL;
802 char *dst;
803 int error;
804
805 if (cop->len > 256*1024-4) {
806 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
807 return (E2BIG);
808 }
809
810 if (cse->txform) {
811 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
812 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
813 return (EINVAL);
814 }
815 }
816
817 if (cop->mac && cse->hashsize == 0) {
818 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
819 return (EINVAL);
820 }
821
822 /*
823 * The COP_F_CIPHER_FIRST flag predates explicit session
824 * modes, but the only way it was used was for EtA so allow it
825 * as long as it is consistent with EtA.
826 */
827 if (cop->flags & COP_F_CIPHER_FIRST) {
828 if (cop->op != COP_ENCRYPT) {
829 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
830 return (EINVAL);
831 }
832 }
833
834 cod = cod_alloc(cse, 0, cop->len + cse->hashsize);
835 dst = cop->dst;
836
837 crp = crypto_getreq(cse->cses, M_WAITOK);
838
839 error = copyin(cop->src, cod->buf, cop->len);
840 if (error) {
841 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
842 goto bail;
843 }
844 crp->crp_payload_start = 0;
845 crp->crp_payload_length = cop->len;
846 if (cse->hashsize)
847 crp->crp_digest_start = cop->len;
848
849 switch (cse->mode) {
850 case CSP_MODE_COMPRESS:
851 switch (cop->op) {
852 case COP_ENCRYPT:
853 crp->crp_op = CRYPTO_OP_COMPRESS;
854 break;
855 case COP_DECRYPT:
856 crp->crp_op = CRYPTO_OP_DECOMPRESS;
857 break;
858 default:
859 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
860 error = EINVAL;
861 goto bail;
862 }
863 break;
864 case CSP_MODE_CIPHER:
865 switch (cop->op) {
866 case COP_ENCRYPT:
867 crp->crp_op = CRYPTO_OP_ENCRYPT;
868 break;
869 case COP_DECRYPT:
870 crp->crp_op = CRYPTO_OP_DECRYPT;
871 break;
872 default:
873 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
874 error = EINVAL;
875 goto bail;
876 }
877 break;
878 case CSP_MODE_DIGEST:
879 switch (cop->op) {
880 case 0:
881 case COP_ENCRYPT:
882 case COP_DECRYPT:
883 crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
884 if (cod->obuf != NULL)
885 crp->crp_digest_start = 0;
886 break;
887 default:
888 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
889 error = EINVAL;
890 goto bail;
891 }
892 break;
893 case CSP_MODE_ETA:
894 switch (cop->op) {
895 case COP_ENCRYPT:
896 crp->crp_op = CRYPTO_OP_ENCRYPT |
897 CRYPTO_OP_COMPUTE_DIGEST;
898 break;
899 case COP_DECRYPT:
900 crp->crp_op = CRYPTO_OP_DECRYPT |
901 CRYPTO_OP_VERIFY_DIGEST;
902 break;
903 default:
904 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
905 error = EINVAL;
906 goto bail;
907 }
908 break;
909 default:
910 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
911 error = EINVAL;
912 goto bail;
913 }
914
915 crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
916 crypto_use_buf(crp, cod->buf, cop->len + cse->hashsize);
917 if (cod->obuf)
918 crypto_use_output_buf(crp, cod->obuf, cop->len + cse->hashsize);
919 crp->crp_callback = cryptodev_cb;
920 crp->crp_opaque = cod;
921
922 if (cop->iv) {
923 if (cse->ivsize == 0) {
924 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
925 error = EINVAL;
926 goto bail;
927 }
928 error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
929 if (error) {
930 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
931 goto bail;
932 }
933 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
934 } else if (cse->ivsize != 0) {
935 crp->crp_iv_start = 0;
936 crp->crp_payload_start += cse->ivsize;
937 crp->crp_payload_length -= cse->ivsize;
938 dst += cse->ivsize;
939 }
940
941 if (cop->mac != NULL && crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
942 error = copyin(cop->mac, cod->buf + crp->crp_digest_start,
943 cse->hashsize);
944 if (error) {
945 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
946 goto bail;
947 }
948 }
949 again:
950 /*
951 * Let the dispatch run unlocked, then, interlock against the
952 * callback before checking if the operation completed and going
953 * to sleep. This insures drivers don't inherit our lock which
954 * results in a lock order reversal between crypto_dispatch forced
955 * entry and the crypto_done callback into us.
956 */
957 error = crypto_dispatch(crp);
958 if (error != 0) {
959 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
960 goto bail;
961 }
962
963 mtx_lock(&cse->lock);
964 while (!cod->done)
965 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
966 mtx_unlock(&cse->lock);
967
968 if (crp->crp_etype == EAGAIN) {
969 crp->crp_etype = 0;
970 crp->crp_flags &= ~CRYPTO_F_DONE;
971 cod->done = false;
972 goto again;
973 }
974
975 if (crp->crp_etype != 0) {
976 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
977 error = crp->crp_etype;
978 goto bail;
979 }
980
981 if (cop->dst != NULL) {
982 error = copyout(cod->obuf != NULL ? cod->obuf :
983 cod->buf + crp->crp_payload_start, dst,
984 crp->crp_payload_length);
985 if (error) {
986 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
987 goto bail;
988 }
989 }
990
991 if (cop->mac != NULL && (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
992 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
993 crp->crp_digest_start, cop->mac, cse->hashsize);
994 if (error) {
995 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
996 goto bail;
997 }
998 }
999
1000 bail:
1001 crypto_freereq(crp);
1002 cod_free(cod);
1003
1004 return (error);
1005 }
1006
1007 static int
1008 cryptodev_aead(struct csession *cse, struct crypt_aead *caead)
1009 {
1010 struct cryptop_data *cod = NULL;
1011 struct cryptop *crp = NULL;
1012 char *dst;
1013 int error;
1014
1015 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1016 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1017 return (E2BIG);
1018 }
1019
1020 if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
1021 (caead->len % cse->txform->blocksize) != 0) {
1022 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1023 return (EINVAL);
1024 }
1025
1026 /*
1027 * The COP_F_CIPHER_FIRST flag predates explicit session
1028 * modes, but the only way it was used was for EtA so allow it
1029 * as long as it is consistent with EtA.
1030 */
1031 if (caead->flags & COP_F_CIPHER_FIRST) {
1032 if (caead->op != COP_ENCRYPT) {
1033 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1034 return (EINVAL);
1035 }
1036 }
1037
1038 cod = cod_alloc(cse, caead->aadlen, caead->len + cse->hashsize);
1039 dst = caead->dst;
1040
1041 crp = crypto_getreq(cse->cses, M_WAITOK);
1042
1043 if (cod->aad != NULL)
1044 error = copyin(caead->aad, cod->aad, caead->aadlen);
1045 else
1046 error = copyin(caead->aad, cod->buf, caead->aadlen);
1047 if (error) {
1048 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1049 goto bail;
1050 }
1051 crp->crp_aad = cod->aad;
1052 crp->crp_aad_start = 0;
1053 crp->crp_aad_length = caead->aadlen;
1054
1055 if (cod->aad != NULL)
1056 crp->crp_payload_start = 0;
1057 else
1058 crp->crp_payload_start = caead->aadlen;
1059 error = copyin(caead->src, cod->buf + crp->crp_payload_start,
1060 caead->len);
1061 if (error) {
1062 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1063 goto bail;
1064 }
1065 crp->crp_payload_length = caead->len;
1066 if (caead->op == COP_ENCRYPT && cod->obuf != NULL)
1067 crp->crp_digest_start = crp->crp_payload_output_start +
1068 caead->len;
1069 else
1070 crp->crp_digest_start = crp->crp_payload_start + caead->len;
1071
1072 switch (cse->mode) {
1073 case CSP_MODE_AEAD:
1074 case CSP_MODE_ETA:
1075 switch (caead->op) {
1076 case COP_ENCRYPT:
1077 crp->crp_op = CRYPTO_OP_ENCRYPT |
1078 CRYPTO_OP_COMPUTE_DIGEST;
1079 break;
1080 case COP_DECRYPT:
1081 crp->crp_op = CRYPTO_OP_DECRYPT |
1082 CRYPTO_OP_VERIFY_DIGEST;
1083 break;
1084 default:
1085 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1086 error = EINVAL;
1087 goto bail;
1088 }
1089 break;
1090 default:
1091 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1092 error = EINVAL;
1093 goto bail;
1094 }
1095
1096 crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
1097 crypto_use_buf(crp, cod->buf, crp->crp_payload_start + caead->len +
1098 cse->hashsize);
1099 if (cod->obuf != NULL)
1100 crypto_use_output_buf(crp, cod->obuf, caead->len +
1101 cse->hashsize);
1102 crp->crp_callback = cryptodev_cb;
1103 crp->crp_opaque = cod;
1104
1105 if (caead->iv) {
1106 /*
1107 * Permit a 16-byte IV for AES-XTS, but only use the
1108 * first 8 bytes as a block number.
1109 */
1110 if (cse->mode == CSP_MODE_ETA &&
1111 caead->ivlen == AES_BLOCK_LEN &&
1112 cse->ivsize == AES_XTS_IV_LEN)
1113 caead->ivlen = AES_XTS_IV_LEN;
1114
1115 if (caead->ivlen != cse->ivsize) {
1116 error = EINVAL;
1117 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1118 goto bail;
1119 }
1120
1121 error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
1122 if (error) {
1123 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1124 goto bail;
1125 }
1126 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1127 } else {
1128 crp->crp_iv_start = crp->crp_payload_start;
1129 crp->crp_payload_start += cse->ivsize;
1130 crp->crp_payload_length -= cse->ivsize;
1131 dst += cse->ivsize;
1132 }
1133
1134 if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1135 error = copyin(caead->tag, cod->buf + crp->crp_digest_start,
1136 cse->hashsize);
1137 if (error) {
1138 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1139 goto bail;
1140 }
1141 }
1142 again:
1143 /*
1144 * Let the dispatch run unlocked, then, interlock against the
1145 * callback before checking if the operation completed and going
1146 * to sleep. This insures drivers don't inherit our lock which
1147 * results in a lock order reversal between crypto_dispatch forced
1148 * entry and the crypto_done callback into us.
1149 */
1150 error = crypto_dispatch(crp);
1151 if (error != 0) {
1152 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1153 goto bail;
1154 }
1155
1156 mtx_lock(&cse->lock);
1157 while (!cod->done)
1158 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1159 mtx_unlock(&cse->lock);
1160
1161 if (crp->crp_etype == EAGAIN) {
1162 crp->crp_etype = 0;
1163 crp->crp_flags &= ~CRYPTO_F_DONE;
1164 cod->done = false;
1165 goto again;
1166 }
1167
1168 if (crp->crp_etype != 0) {
1169 error = crp->crp_etype;
1170 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1171 goto bail;
1172 }
1173
1174 if (caead->dst != NULL) {
1175 error = copyout(cod->obuf != NULL ? cod->obuf :
1176 cod->buf + crp->crp_payload_start, dst,
1177 crp->crp_payload_length);
1178 if (error) {
1179 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1180 goto bail;
1181 }
1182 }
1183
1184 if ((crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1185 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1186 crp->crp_digest_start, caead->tag, cse->hashsize);
1187 if (error) {
1188 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1189 goto bail;
1190 }
1191 }
1192
1193 bail:
1194 crypto_freereq(crp);
1195 cod_free(cod);
1196
1197 return (error);
1198 }
1199
1200 static void
1201 cryptodevkey_cb(struct cryptkop *krp)
1202 {
1203
1204 wakeup_one(krp);
1205 }
1206
1207 static int
1208 cryptodev_key(struct crypt_kop *kop)
1209 {
1210 struct cryptkop *krp = NULL;
1211 int error = EINVAL;
1212 int in, out, size, i;
1213
1214 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1215 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1216 return (EFBIG);
1217 }
1218
1219 in = kop->crk_iparams;
1220 out = kop->crk_oparams;
1221 switch (kop->crk_op) {
1222 case CRK_MOD_EXP:
1223 if (in == 3 && out == 1)
1224 break;
1225 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1226 return (EINVAL);
1227 case CRK_MOD_EXP_CRT:
1228 if (in == 6 && out == 1)
1229 break;
1230 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1231 return (EINVAL);
1232 case CRK_DSA_SIGN:
1233 if (in == 5 && out == 2)
1234 break;
1235 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1236 return (EINVAL);
1237 case CRK_DSA_VERIFY:
1238 if (in == 7 && out == 0)
1239 break;
1240 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1241 return (EINVAL);
1242 case CRK_DH_COMPUTE_KEY:
1243 if (in == 3 && out == 1)
1244 break;
1245 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1246 return (EINVAL);
1247 default:
1248 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1249 return (EINVAL);
1250 }
1251
1252 krp = malloc(sizeof(*krp), M_XDATA, M_WAITOK | M_ZERO);
1253 krp->krp_op = kop->crk_op;
1254 krp->krp_status = kop->crk_status;
1255 krp->krp_iparams = kop->crk_iparams;
1256 krp->krp_oparams = kop->crk_oparams;
1257 krp->krp_crid = kop->crk_crid;
1258 krp->krp_status = 0;
1259 krp->krp_callback = cryptodevkey_cb;
1260
1261 for (i = 0; i < CRK_MAXPARAM; i++) {
1262 if (kop->crk_param[i].crp_nbits > 65536) {
1263 /* Limit is the same as in OpenBSD */
1264 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1265 goto fail;
1266 }
1267 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1268 }
1269 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1270 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1271 if (size == 0)
1272 continue;
1273 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1274 if (i >= krp->krp_iparams)
1275 continue;
1276 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1277 if (error) {
1278 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1279 goto fail;
1280 }
1281 }
1282
1283 error = crypto_kdispatch(krp);
1284 if (error) {
1285 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1286 goto fail;
1287 }
1288 error = tsleep(krp, PSOCK, "crydev", 0);
1289 if (error) {
1290 /* XXX can this happen? if so, how do we recover? */
1291 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1292 goto fail;
1293 }
1294
1295 kop->crk_crid = krp->krp_hid; /* device that did the work */
1296 if (krp->krp_status != 0) {
1297 error = krp->krp_status;
1298 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1299 goto fail;
1300 }
1301
1302 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1303 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1304 if (size == 0)
1305 continue;
1306 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1307 if (error) {
1308 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1309 goto fail;
1310 }
1311 }
1312
1313 fail:
1314 if (krp) {
1315 kop->crk_status = krp->krp_status;
1316 for (i = 0; i < CRK_MAXPARAM; i++) {
1317 if (krp->krp_param[i].crp_p)
1318 free(krp->krp_param[i].crp_p, M_XDATA);
1319 }
1320 free(krp, M_XDATA);
1321 }
1322 return (error);
1323 }
1324
1325 static int
1326 cryptodev_find(struct crypt_find_op *find)
1327 {
1328 device_t dev;
1329 size_t fnlen = sizeof find->name;
1330
1331 if (find->crid != -1) {
1332 dev = crypto_find_device_byhid(find->crid);
1333 if (dev == NULL)
1334 return (ENOENT);
1335 strncpy(find->name, device_get_nameunit(dev), fnlen);
1336 find->name[fnlen - 1] = '\x';
1337 } else {
1338 find->name[fnlen - 1] = '\x';
1339 find->crid = crypto_find_driver(find->name);
1340 if (find->crid == -1)
1341 return (ENOENT);
1342 }
1343 return (0);
1344 }
1345
1346 static void
1347 fcrypt_dtor(void *data)
1348 {
1349 struct fcrypt *fcr = data;
1350 struct csession *cse;
1351
1352 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1353 TAILQ_REMOVE(&fcr->csessions, cse, next);
1354 KASSERT(refcount_load(&cse->refs) == 1,
1355 ("%s: crypto session %p with %d refs", __func__, cse,
1356 refcount_load(&cse->refs)));
1357 cse_free(cse);
1358 }
1359 mtx_destroy(&fcr->lock);
1360 free(fcr, M_XDATA);
1361 }
1362
1363 static int
1364 crypto_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
1365 {
1366 struct fcrypt *fcr;
1367 int error;
1368
1369 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1370 TAILQ_INIT(&fcr->csessions);
1371 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1372 error = devfs_set_cdevpriv(fcr, fcrypt_dtor);
1373 if (error)
1374 fcrypt_dtor(fcr);
1375 return (error);
1376 }
1377
1378 static int
1379 crypto_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag,
1380 struct thread *td)
1381 {
1382 static struct timeval keywarn, featwarn;
1383 struct fcrypt *fcr;
1384 struct csession *cse;
1385 struct session2_op *sop;
1386 struct crypt_op *cop;
1387 struct crypt_aead *caead;
1388 struct crypt_kop *kop;
1389 uint32_t ses;
1390 int error = 0;
1391 union {
1392 struct session2_op sopc;
1393 #ifdef COMPAT_FREEBSD32
1394 struct crypt_op copc;
1395 struct crypt_aead aeadc;
1396 struct crypt_kop kopc;
1397 #endif
1398 } thunk;
1399 #ifdef COMPAT_FREEBSD32
1400 u_long cmd32;
1401 void *data32;
1402
1403 cmd32 = 0;
1404 data32 = NULL;
1405 switch (cmd) {
1406 case CIOCGSESSION32:
1407 cmd32 = cmd;
1408 data32 = data;
1409 cmd = CIOCGSESSION;
1410 data = (void *)&thunk.sopc;
1411 session_op_from_32((struct session_op32 *)data32, &thunk.sopc);
1412 break;
1413 case CIOCGSESSION232:
1414 cmd32 = cmd;
1415 data32 = data;
1416 cmd = CIOCGSESSION2;
1417 data = (void *)&thunk.sopc;
1418 session2_op_from_32((struct session2_op32 *)data32,
1419 &thunk.sopc);
1420 break;
1421 case CIOCCRYPT32:
1422 cmd32 = cmd;
1423 data32 = data;
1424 cmd = CIOCCRYPT;
1425 data = (void *)&thunk.copc;
1426 crypt_op_from_32((struct crypt_op32 *)data32, &thunk.copc);
1427 break;
1428 case CIOCCRYPTAEAD32:
1429 cmd32 = cmd;
1430 data32 = data;
1431 cmd = CIOCCRYPTAEAD;
1432 data = (void *)&thunk.aeadc;
1433 crypt_aead_from_32((struct crypt_aead32 *)data32, &thunk.aeadc);
1434 break;
1435 case CIOCKEY32:
1436 case CIOCKEY232:
1437 cmd32 = cmd;
1438 data32 = data;
1439 if (cmd == CIOCKEY32)
1440 cmd = CIOCKEY;
1441 else
1442 cmd = CIOCKEY2;
1443 data = (void *)&thunk.kopc;
1444 crypt_kop_from_32((struct crypt_kop32 *)data32, &thunk.kopc);
1445 break;
1446 }
1447 #endif
1448
1449 devfs_get_cdevpriv((void **)&fcr);
1450
1451 switch (cmd) {
1452 #ifdef COMPAT_FREEBSD12
1453 case CRIOGET:
1454 /*
1455 * NB: This may fail in cases that the old
1456 * implementation did not if the current process has
1457 * restricted filesystem access (e.g. running in a
1458 * jail that does not expose /dev/crypto or in
1459 * capability mode).
1460 */
1461 error = kern_openat(td, AT_FDCWD, "/dev/crypto", UIO_SYSSPACE,
1462 O_RDWR, 0);
1463 if (error == 0)
1464 *(uint32_t *)data = td->td_retval[0];
1465 break;
1466 #endif
1467 case CIOCGSESSION:
1468 case CIOCGSESSION2:
1469 if (cmd == CIOCGSESSION) {
1470 session2_op_from_op((void *)data, &thunk.sopc);
1471 sop = &thunk.sopc;
1472 } else
1473 sop = (struct session2_op *)data;
1474
1475 error = cse_create(fcr, sop);
1476 if (cmd == CIOCGSESSION && error == 0)
1477 session2_op_to_op(sop, (void *)data);
1478 break;
1479 case CIOCFSESSION:
1480 ses = *(uint32_t *)data;
1481 if (!cse_delete(fcr, ses)) {
1482 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1483 return (EINVAL);
1484 }
1485 break;
1486 case CIOCCRYPT:
1487 cop = (struct crypt_op *)data;
1488 cse = cse_find(fcr, cop->ses);
1489 if (cse == NULL) {
1490 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1491 return (EINVAL);
1492 }
1493 error = cryptodev_op(cse, cop);
1494 cse_free(cse);
1495 break;
1496 case CIOCKEY:
1497 case CIOCKEY2:
1498 if (ratecheck(&keywarn, &warninterval))
1499 gone_in(14,
1500 "Asymmetric crypto operations via /dev/crypto");
1501
1502 if (!crypto_userasymcrypto) {
1503 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1504 return (EPERM); /* XXX compat? */
1505 }
1506 kop = (struct crypt_kop *)data;
1507 if (cmd == CIOCKEY) {
1508 /* NB: crypto core enforces s/w driver use */
1509 kop->crk_crid =
1510 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
1511 }
1512 mtx_lock(&Giant);
1513 error = cryptodev_key(kop);
1514 mtx_unlock(&Giant);
1515 break;
1516 case CIOCASYMFEAT:
1517 if (ratecheck(&featwarn, &warninterval))
1518 gone_in(14,
1519 "Asymmetric crypto features via /dev/crypto");
1520
1521 if (!crypto_userasymcrypto) {
1522 /*
1523 * NB: if user asym crypto operations are
1524 * not permitted return "no algorithms"
1525 * so well-behaved applications will just
1526 * fallback to doing them in software.
1527 */
1528 *(int *)data = 0;
1529 } else {
1530 error = crypto_getfeat((int *)data);
1531 if (error)
1532 SDT_PROBE1(opencrypto, dev, ioctl, error,
1533 __LINE__);
1534 }
1535 break;
1536 case CIOCFINDDEV:
1537 error = cryptodev_find((struct crypt_find_op *)data);
1538 break;
1539 case CIOCCRYPTAEAD:
1540 caead = (struct crypt_aead *)data;
1541 cse = cse_find(fcr, caead->ses);
1542 if (cse == NULL) {
1543 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1544 return (EINVAL);
1545 }
1546 error = cryptodev_aead(cse, caead);
1547 cse_free(cse);
1548 break;
1549 default:
1550 error = EINVAL;
1551 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1552 break;
1553 }
1554
1555 #ifdef COMPAT_FREEBSD32
1556 switch (cmd32) {
1557 case CIOCGSESSION32:
1558 if (error == 0)
1559 session_op_to_32((void *)data, data32);
1560 break;
1561 case CIOCGSESSION232:
1562 if (error == 0)
1563 session2_op_to_32((void *)data, data32);
1564 break;
1565 case CIOCCRYPT32:
1566 if (error == 0)
1567 crypt_op_to_32((void *)data, data32);
1568 break;
1569 case CIOCCRYPTAEAD32:
1570 if (error == 0)
1571 crypt_aead_to_32((void *)data, data32);
1572 break;
1573 case CIOCKEY32:
1574 case CIOCKEY232:
1575 crypt_kop_to_32((void *)data, data32);
1576 break;
1577 }
1578 #endif
1579 return (error);
1580 }
1581
1582 static struct cdevsw crypto_cdevsw = {
1583 .d_version = D_VERSION,
1584 .d_open = crypto_open,
1585 .d_ioctl = crypto_ioctl,
1586 .d_name = "crypto",
1587 };
1588 static struct cdev *crypto_dev;
1589
1590 /*
1591 * Initialization code, both for static and dynamic loading.
1592 */
1593 static int
1594 cryptodev_modevent(module_t mod, int type, void *unused)
1595 {
1596 switch (type) {
1597 case MOD_LOAD:
1598 if (bootverbose)
1599 printf("crypto: <crypto device>\n");
1600 crypto_dev = make_dev(&crypto_cdevsw, 0,
1601 UID_ROOT, GID_WHEEL, 0666,
1602 "crypto");
1603 return 0;
1604 case MOD_UNLOAD:
1605 /*XXX disallow if active sessions */
1606 destroy_dev(crypto_dev);
1607 return 0;
1608 }
1609 return EINVAL;
1610 }
1611
1612 static moduledata_t cryptodev_mod = {
1613 "cryptodev",
1614 cryptodev_modevent,
1615 0
1616 };
1617 MODULE_VERSION(cryptodev, 1);
1618 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1619 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1620 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
Cache object: 8f27452ad3b0ec44d76535e047da778b
|