1 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
4 * Copyright (c) 2001 Theo de Raadt
5 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
6 * Copyright (c) 2014 The FreeBSD Foundation
9 * Portions of this software were developed by John-Mark Gurney
10 * under sponsorship of the FreeBSD Foundation and
11 * Rubicon Communications, LLC (Netgate).
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
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.
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.
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.
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include "opt_compat.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/malloc.h>
51 #include <sys/mutex.h>
52 #include <sys/sysctl.h>
54 #include <sys/filedesc.h>
55 #include <sys/errno.h>
57 #include <sys/random.h>
59 #include <sys/kernel.h>
60 #include <sys/module.h>
61 #include <sys/fcntl.h>
66 #include <opencrypto/cryptodev.h>
67 #include <opencrypto/xform.h>
69 SDT_PROVIDER_DECLARE(opencrypto);
71 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
73 #ifdef COMPAT_FREEBSD32
74 #include <sys/mount.h>
75 #include <compat/freebsd32/freebsd32.h>
87 struct session2_op32 {
120 struct crparam32 crk_param[CRK_MAXPARAM];
123 struct cryptotstat32 {
124 struct timespec32 acc;
125 struct timespec32 min;
126 struct timespec32 max;
130 struct cryptostats32 {
138 u_int32_t cs_kblocks;
139 struct cryptotstat32 cs_invoke;
140 struct cryptotstat32 cs_done;
141 struct cryptotstat32 cs_cb;
142 struct cryptotstat32 cs_finis;
145 #define CIOCGSESSION32 _IOWR('c', 101, struct session_op32)
146 #define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32)
147 #define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32)
148 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
149 #define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32)
152 session_op_from_32(const struct session_op32 *from, struct session_op *to)
155 CP(*from, *to, cipher);
157 CP(*from, *to, keylen);
158 PTRIN_CP(*from, *to, key);
159 CP(*from, *to, mackeylen);
160 PTRIN_CP(*from, *to, mackey);
165 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
168 session_op_from_32((const struct session_op32 *)from,
169 (struct session_op *)to);
170 CP(*from, *to, crid);
174 session_op_to_32(const struct session_op *from, struct session_op32 *to)
177 CP(*from, *to, cipher);
179 CP(*from, *to, keylen);
180 PTROUT_CP(*from, *to, key);
181 CP(*from, *to, mackeylen);
182 PTROUT_CP(*from, *to, mackey);
187 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
190 session_op_to_32((const struct session_op *)from,
191 (struct session_op32 *)to);
192 CP(*from, *to, crid);
196 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
201 CP(*from, *to, flags);
203 PTRIN_CP(*from, *to, src);
204 PTRIN_CP(*from, *to, dst);
205 PTRIN_CP(*from, *to, mac);
206 PTRIN_CP(*from, *to, iv);
210 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
215 CP(*from, *to, flags);
217 PTROUT_CP(*from, *to, src);
218 PTROUT_CP(*from, *to, dst);
219 PTROUT_CP(*from, *to, mac);
220 PTROUT_CP(*from, *to, iv);
224 crparam_from_32(const struct crparam32 *from, struct crparam *to)
227 PTRIN_CP(*from, *to, crp_p);
228 CP(*from, *to, crp_nbits);
232 crparam_to_32(const struct crparam *from, struct crparam32 *to)
235 PTROUT_CP(*from, *to, crp_p);
236 CP(*from, *to, crp_nbits);
240 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
244 CP(*from, *to, crk_op);
245 CP(*from, *to, crk_status);
246 CP(*from, *to, crk_iparams);
247 CP(*from, *to, crk_oparams);
248 CP(*from, *to, crk_crid);
249 for (i = 0; i < CRK_MAXPARAM; i++)
250 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
254 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
258 CP(*from, *to, crk_op);
259 CP(*from, *to, crk_status);
260 CP(*from, *to, crk_iparams);
261 CP(*from, *to, crk_oparams);
262 CP(*from, *to, crk_crid);
263 for (i = 0; i < CRK_MAXPARAM; i++)
264 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
269 TAILQ_ENTRY(csession) next;
273 struct mtx lock; /* for op submission */
276 struct enc_xform *txform;
278 struct auth_hash *thash;
287 struct cryptop_data {
288 struct csession *cse;
290 struct iovec iovec[1];
296 TAILQ_HEAD(csessionlist, csession) csessions;
301 static int cryptof_ioctl(struct file *, u_long, void *,
302 struct ucred *, struct thread *);
303 static int cryptof_stat(struct file *, struct stat *,
304 struct ucred *, struct thread *);
305 static int cryptof_close(struct file *, struct thread *);
306 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
309 static struct fileops cryptofops = {
310 .fo_read = invfo_rdwr,
311 .fo_write = invfo_rdwr,
312 .fo_truncate = invfo_truncate,
313 .fo_ioctl = cryptof_ioctl,
314 .fo_poll = invfo_poll,
315 .fo_kqfilter = invfo_kqfilter,
316 .fo_stat = cryptof_stat,
317 .fo_close = cryptof_close,
318 .fo_chmod = invfo_chmod,
319 .fo_chown = invfo_chown,
320 .fo_sendfile = invfo_sendfile,
321 .fo_fill_kinfo = cryptof_fill_kinfo,
324 static struct csession *csefind(struct fcrypt *, u_int);
325 static int csedelete(struct fcrypt *, u_int);
326 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
327 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
329 static int csefree(struct csession *);
331 static int cryptodev_op(struct csession *, struct crypt_op *,
332 struct ucred *, struct thread *td);
333 static int cryptodev_aead(struct csession *, struct crypt_aead *,
334 struct ucred *, struct thread *);
335 static int cryptodev_key(struct crypt_kop *);
336 static int cryptodev_find(struct crypt_find_op *);
339 * Check a crypto identifier to see if it requested
340 * a software device/driver. This can be done either
341 * by device name/class or through search constraints.
344 checkforsoftware(int *cridp)
350 if (!crypto_devallowsoft) {
351 if (crid & CRYPTOCAP_F_SOFTWARE) {
352 if (crid & CRYPTOCAP_F_HARDWARE) {
353 *cridp = CRYPTOCAP_F_HARDWARE;
358 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
359 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
371 struct ucred *active_cred,
374 #define SES2(p) ((struct session2_op *)p)
375 struct cryptoini cria, crie;
376 struct fcrypt *fcr = fp->f_data;
377 struct csession *cse;
378 struct session_op *sop;
379 struct crypt_op *cop;
380 struct crypt_aead *caead;
381 struct enc_xform *txform = NULL;
382 struct auth_hash *thash = NULL;
383 struct crypt_kop *kop;
387 #ifdef COMPAT_FREEBSD32
388 struct session2_op sopc;
389 struct crypt_op copc;
390 struct crypt_kop kopc;
396 #ifdef COMPAT_FREEBSD32
398 case CIOCGSESSION232:
399 if (cmd == CIOCGSESSION32) {
400 session_op_from_32(data, (struct session_op *)&sopc);
401 sop = (struct session_op *)&sopc;
402 } else if (cmd == CIOCGSESSION232) {
403 session2_op_from_32(data, &sopc);
404 sop = (struct session_op *)&sopc;
407 sop = (struct session_op *)data;
408 switch (sop->cipher) {
412 txform = &enc_xform_des;
414 case CRYPTO_3DES_CBC:
415 txform = &enc_xform_3des;
418 txform = &enc_xform_blf;
420 case CRYPTO_CAST_CBC:
421 txform = &enc_xform_cast5;
423 case CRYPTO_SKIPJACK_CBC:
424 txform = &enc_xform_skipjack;
427 txform = &enc_xform_rijndael128;
430 txform = &enc_xform_aes_xts;
432 case CRYPTO_NULL_CBC:
433 txform = &enc_xform_null;
436 txform = &enc_xform_arc4;
438 case CRYPTO_CAMELLIA_CBC:
439 txform = &enc_xform_camellia;
442 txform = &enc_xform_aes_icm;
444 case CRYPTO_AES_NIST_GCM_16:
445 txform = &enc_xform_aes_nist_gcm;
449 CRYPTDEB("invalid cipher");
450 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
457 case CRYPTO_MD5_HMAC:
458 thash = &auth_hash_hmac_md5;
460 case CRYPTO_SHA1_HMAC:
461 thash = &auth_hash_hmac_sha1;
463 case CRYPTO_SHA2_256_HMAC:
464 thash = &auth_hash_hmac_sha2_256;
466 case CRYPTO_SHA2_384_HMAC:
467 thash = &auth_hash_hmac_sha2_384;
469 case CRYPTO_SHA2_512_HMAC:
470 thash = &auth_hash_hmac_sha2_512;
472 case CRYPTO_RIPEMD160_HMAC:
473 thash = &auth_hash_hmac_ripemd_160;
475 case CRYPTO_AES_128_NIST_GMAC:
476 thash = &auth_hash_nist_gmac_aes_128;
478 case CRYPTO_AES_192_NIST_GMAC:
479 thash = &auth_hash_nist_gmac_aes_192;
481 case CRYPTO_AES_256_NIST_GMAC:
482 thash = &auth_hash_nist_gmac_aes_256;
487 thash = &auth_hash_md5;
490 thash = &auth_hash_sha1;
493 case CRYPTO_NULL_HMAC:
494 thash = &auth_hash_null;
497 CRYPTDEB("invalid mac");
498 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
502 bzero(&crie, sizeof(crie));
503 bzero(&cria, sizeof(cria));
506 crie.cri_alg = txform->type;
507 crie.cri_klen = sop->keylen * 8;
508 if (sop->keylen > txform->maxkey ||
509 sop->keylen < txform->minkey) {
510 CRYPTDEB("invalid cipher parameters");
512 SDT_PROBE1(opencrypto, dev, ioctl, error,
517 crie.cri_key = malloc(crie.cri_klen / 8,
519 if ((error = copyin(sop->key, crie.cri_key,
520 crie.cri_klen / 8))) {
521 CRYPTDEB("invalid key");
522 SDT_PROBE1(opencrypto, dev, ioctl, error,
527 crie.cri_next = &cria;
531 cria.cri_alg = thash->type;
532 cria.cri_klen = sop->mackeylen * 8;
533 if (sop->mackeylen != thash->keysize) {
534 CRYPTDEB("invalid mac key length");
536 SDT_PROBE1(opencrypto, dev, ioctl, error,
542 cria.cri_key = malloc(cria.cri_klen / 8,
544 if ((error = copyin(sop->mackey, cria.cri_key,
545 cria.cri_klen / 8))) {
546 CRYPTDEB("invalid mac key");
547 SDT_PROBE1(opencrypto, dev, ioctl,
554 /* NB: CIOCGSESSION2 has the crid */
555 if (cmd == CIOCGSESSION2
556 #ifdef COMPAT_FREEBSD32
557 || cmd == CIOCGSESSION232
560 crid = SES2(sop)->crid;
561 error = checkforsoftware(&crid);
563 CRYPTDEB("checkforsoftware");
564 SDT_PROBE1(opencrypto, dev, ioctl, error,
569 crid = CRYPTOCAP_F_HARDWARE;
570 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
572 CRYPTDEB("crypto_newsession");
573 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
577 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
578 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
582 crypto_freesession(sid);
584 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
585 CRYPTDEB("csecreate");
589 if (cmd == CIOCGSESSION2
590 #ifdef COMPAT_FREEBSD32
591 || cmd == CIOCGSESSION232
594 /* return hardware/driver id */
595 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
600 free(crie.cri_key, M_XDATA);
602 free(cria.cri_key, M_XDATA);
604 #ifdef COMPAT_FREEBSD32
606 if (cmd == CIOCGSESSION32)
607 session_op_to_32(sop, data);
608 else if (cmd == CIOCGSESSION232)
609 session2_op_to_32((struct session2_op *)sop,
615 ses = *(u_int32_t *)data;
616 error = csedelete(fcr, ses);
618 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
621 #ifdef COMPAT_FREEBSD32
623 if (cmd == CIOCCRYPT32) {
625 crypt_op_from_32(data, cop);
628 cop = (struct crypt_op *)data;
629 cse = csefind(fcr, cop->ses);
631 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
634 error = cryptodev_op(cse, cop, active_cred, td);
636 #ifdef COMPAT_FREEBSD32
637 if (error == 0 && cmd == CIOCCRYPT32)
638 crypt_op_to_32(cop, data);
643 #ifdef COMPAT_FREEBSD32
647 if (!crypto_userasymcrypto) {
648 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
649 return (EPERM); /* XXX compat? */
651 #ifdef COMPAT_FREEBSD32
652 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
654 crypt_kop_from_32(data, kop);
657 kop = (struct crypt_kop *)data;
659 #ifdef COMPAT_FREEBSD32
663 /* NB: crypto core enforces s/w driver use */
665 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
668 error = cryptodev_key(kop);
670 #ifdef COMPAT_FREEBSD32
671 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
672 crypt_kop_to_32(kop, data);
676 if (!crypto_userasymcrypto) {
678 * NB: if user asym crypto operations are
679 * not permitted return "no algorithms"
680 * so well-behaved applications will just
681 * fallback to doing them in software.
685 error = crypto_getfeat((int *)data);
687 SDT_PROBE1(opencrypto, dev, ioctl, error,
692 error = cryptodev_find((struct crypt_find_op *)data);
695 caead = (struct crypt_aead *)data;
696 cse = csefind(fcr, caead->ses);
698 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
701 error = cryptodev_aead(cse, caead, active_cred, td);
706 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
713 static int cryptodev_cb(struct cryptop *);
715 static struct cryptop_data *
716 cod_alloc(struct csession *cse, size_t len, struct thread *td)
718 struct cryptop_data *cod;
721 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
725 uio->uio_iov = cod->iovec;
727 uio->uio_resid = len;
728 uio->uio_segflg = UIO_SYSSPACE;
729 uio->uio_rw = UIO_WRITE;
731 uio->uio_iov[0].iov_len = len;
732 uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
737 cod_free(struct cryptop_data *cod)
740 free(cod->uio.uio_iov[0].iov_base, M_XDATA);
746 struct csession *cse,
747 struct crypt_op *cop,
748 struct ucred *active_cred,
751 struct cryptop_data *cod = NULL;
752 struct cryptop *crp = NULL;
753 struct cryptodesc *crde = NULL, *crda = NULL;
756 if (cop->len > 256*1024-4) {
757 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
762 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
763 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
769 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
771 cod = cod_alloc(cse, cop->len, td);
773 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
775 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
780 if (cse->thash && cse->txform) {
781 if (cop->flags & COP_F_CIPHER_FIRST) {
782 crde = crp->crp_desc;
783 crda = crde->crd_next;
785 crda = crp->crp_desc;
786 crde = crda->crd_next;
788 } else if (cse->thash) {
789 crda = crp->crp_desc;
790 } else if (cse->txform) {
791 crde = crp->crp_desc;
793 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
798 if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
800 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
806 crda->crd_len = cop->len;
807 crda->crd_inject = cop->len;
809 crda->crd_alg = cse->mac;
810 crda->crd_key = cse->mackey;
811 crda->crd_klen = cse->mackeylen * 8;
815 if (cop->op == COP_ENCRYPT)
816 crde->crd_flags |= CRD_F_ENCRYPT;
818 crde->crd_flags &= ~CRD_F_ENCRYPT;
819 crde->crd_len = cop->len;
820 crde->crd_inject = 0;
822 crde->crd_alg = cse->cipher;
823 crde->crd_key = cse->key;
824 crde->crd_klen = cse->keylen * 8;
827 crp->crp_ilen = cop->len;
828 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
829 | (cop->flags & COP_F_BATCH);
830 crp->crp_uio = &cod->uio;
831 crp->crp_callback = cryptodev_cb;
832 crp->crp_sid = cse->sid;
833 crp->crp_opaque = cod;
837 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
841 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
842 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
846 if ((error = copyin(cop->iv, crde->crd_iv,
847 cse->txform->blocksize))) {
848 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
851 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
853 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
856 crde->crd_flags |= CRD_F_IV_PRESENT;
857 crde->crd_skip = cse->txform->blocksize;
858 crde->crd_len -= cse->txform->blocksize;
861 if (cop->mac && crda == NULL) {
862 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
869 * Let the dispatch run unlocked, then, interlock against the
870 * callback before checking if the operation completed and going
871 * to sleep. This insures drivers don't inherit our lock which
872 * results in a lock order reversal between crypto_dispatch forced
873 * entry and the crypto_done callback into us.
875 error = crypto_dispatch(crp);
877 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
881 mtx_lock(&cse->lock);
883 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
884 mtx_unlock(&cse->lock);
886 if (crp->crp_etype == EAGAIN) {
888 crp->crp_flags &= ~CRYPTO_F_DONE;
893 if (crp->crp_etype != 0) {
894 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
895 error = crp->crp_etype;
900 (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
902 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
907 (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
908 cop->mac, cse->thash->hashsize))) {
909 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
924 struct csession *cse,
925 struct crypt_aead *caead,
926 struct ucred *active_cred,
929 struct cryptop_data *cod = NULL;
930 struct cryptop *crp = NULL;
931 struct cryptodesc *crde = NULL, *crda = NULL;
934 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
935 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
939 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
940 (caead->len % cse->txform->blocksize) != 0) {
941 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
945 cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
948 crp = crypto_getreq(2);
951 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
955 if (caead->flags & COP_F_CIPHER_FIRST) {
956 crde = crp->crp_desc;
957 crda = crde->crd_next;
959 crda = crp->crp_desc;
960 crde = crda->crd_next;
963 if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
965 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
969 if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
970 caead->aadlen, caead->len))) {
971 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
976 * For GCM, crd_len covers only the AAD. For other ciphers
977 * chained with an HMAC, crd_len covers both the AAD and the
981 if (cse->cipher == CRYPTO_AES_NIST_GCM_16)
982 crda->crd_len = caead->aadlen;
984 crda->crd_len = caead->aadlen + caead->len;
985 crda->crd_inject = caead->aadlen + caead->len;
987 crda->crd_alg = cse->mac;
988 crda->crd_key = cse->mackey;
989 crda->crd_klen = cse->mackeylen * 8;
991 if (caead->op == COP_ENCRYPT)
992 crde->crd_flags |= CRD_F_ENCRYPT;
994 crde->crd_flags &= ~CRD_F_ENCRYPT;
995 crde->crd_skip = caead->aadlen;
996 crde->crd_len = caead->len;
997 crde->crd_inject = caead->aadlen;
999 crde->crd_alg = cse->cipher;
1000 crde->crd_key = cse->key;
1001 crde->crd_klen = cse->keylen * 8;
1003 crp->crp_ilen = caead->aadlen + caead->len;
1004 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1005 | (caead->flags & COP_F_BATCH);
1006 crp->crp_uio = &cod->uio;
1007 crp->crp_callback = cryptodev_cb;
1008 crp->crp_sid = cse->sid;
1009 crp->crp_opaque = cod;
1012 if (caead->ivlen > sizeof(crde->crd_iv)) {
1014 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1018 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1019 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1022 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1024 crde->crd_flags |= CRD_F_IV_PRESENT;
1025 crde->crd_skip += cse->txform->blocksize;
1026 crde->crd_len -= cse->txform->blocksize;
1029 if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1030 caead->len + caead->aadlen, cse->thash->hashsize))) {
1031 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1036 * Let the dispatch run unlocked, then, interlock against the
1037 * callback before checking if the operation completed and going
1038 * to sleep. This insures drivers don't inherit our lock which
1039 * results in a lock order reversal between crypto_dispatch forced
1040 * entry and the crypto_done callback into us.
1042 error = crypto_dispatch(crp);
1044 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1048 mtx_lock(&cse->lock);
1050 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1051 mtx_unlock(&cse->lock);
1053 if (crp->crp_etype == EAGAIN) {
1055 crp->crp_flags &= ~CRYPTO_F_DONE;
1060 if (crp->crp_etype != 0) {
1061 error = crp->crp_etype;
1062 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1066 if (caead->dst && (error = copyout(
1067 (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1069 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1073 if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1074 caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1075 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1080 crypto_freereq(crp);
1088 cryptodev_cb(struct cryptop *crp)
1090 struct cryptop_data *cod = crp->crp_opaque;
1093 * Lock to ensure the wakeup() is not missed by the loops
1094 * waiting on cod->done in cryptodev_op() and
1097 mtx_lock(&cod->cse->lock);
1099 mtx_unlock(&cod->cse->lock);
1105 cryptodevkey_cb(void *op)
1107 struct cryptkop *krp = (struct cryptkop *) op;
1114 cryptodev_key(struct crypt_kop *kop)
1116 struct cryptkop *krp = NULL;
1118 int in, out, size, i;
1120 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1121 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1125 in = kop->crk_iparams;
1126 out = kop->crk_oparams;
1127 switch (kop->crk_op) {
1129 if (in == 3 && out == 1)
1131 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1133 case CRK_MOD_EXP_CRT:
1134 if (in == 6 && out == 1)
1136 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1139 if (in == 5 && out == 2)
1141 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1143 case CRK_DSA_VERIFY:
1144 if (in == 7 && out == 0)
1146 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1148 case CRK_DH_COMPUTE_KEY:
1149 if (in == 3 && out == 1)
1151 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1154 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1158 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1160 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1163 krp->krp_op = kop->crk_op;
1164 krp->krp_status = kop->crk_status;
1165 krp->krp_iparams = kop->crk_iparams;
1166 krp->krp_oparams = kop->crk_oparams;
1167 krp->krp_crid = kop->crk_crid;
1168 krp->krp_status = 0;
1169 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1171 for (i = 0; i < CRK_MAXPARAM; i++) {
1172 if (kop->crk_param[i].crp_nbits > 65536) {
1173 /* Limit is the same as in OpenBSD */
1174 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1177 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1179 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1180 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1183 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1184 if (i >= krp->krp_iparams)
1186 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1188 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1193 error = crypto_kdispatch(krp);
1195 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1198 error = tsleep(krp, PSOCK, "crydev", 0);
1200 /* XXX can this happen? if so, how do we recover? */
1201 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1205 kop->crk_crid = krp->krp_crid; /* device that did the work */
1206 if (krp->krp_status != 0) {
1207 error = krp->krp_status;
1208 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1212 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1213 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1216 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1218 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1225 kop->crk_status = krp->krp_status;
1226 for (i = 0; i < CRK_MAXPARAM; i++) {
1227 if (krp->krp_param[i].crp_p)
1228 free(krp->krp_param[i].crp_p, M_XDATA);
1236 cryptodev_find(struct crypt_find_op *find)
1239 size_t fnlen = sizeof find->name;
1241 if (find->crid != -1) {
1242 dev = crypto_find_device_byhid(find->crid);
1245 strncpy(find->name, device_get_nameunit(dev), fnlen);
1246 find->name[fnlen - 1] = '\x0';
1248 find->name[fnlen - 1] = '\x0';
1249 find->crid = crypto_find_driver(find->name);
1250 if (find->crid == -1)
1261 struct ucred *active_cred,
1265 return (EOPNOTSUPP);
1270 cryptof_close(struct file *fp, struct thread *td)
1272 struct fcrypt *fcr = fp->f_data;
1273 struct csession *cse;
1275 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1276 TAILQ_REMOVE(&fcr->csessions, cse, next);
1277 KASSERT(cse->refs == 1,
1278 ("%s: crypto session %p with %d refs", __func__, cse,
1288 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1291 kif->kf_type = KF_TYPE_CRYPTO;
1295 static struct csession *
1296 csefind(struct fcrypt *fcr, u_int ses)
1298 struct csession *cse;
1300 mtx_lock(&fcr->lock);
1301 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1302 if (cse->ses == ses) {
1303 refcount_acquire(&cse->refs);
1304 mtx_unlock(&fcr->lock);
1308 mtx_unlock(&fcr->lock);
1313 csedelete(struct fcrypt *fcr, u_int ses)
1315 struct csession *cse;
1317 mtx_lock(&fcr->lock);
1318 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1319 if (cse->ses == ses) {
1320 TAILQ_REMOVE(&fcr->csessions, cse, next);
1321 mtx_unlock(&fcr->lock);
1322 return (csefree(cse));
1325 mtx_unlock(&fcr->lock);
1330 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
1331 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1332 struct enc_xform *txform, struct auth_hash *thash)
1334 struct csession *cse;
1336 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1339 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1340 refcount_init(&cse->refs, 1);
1342 cse->keylen = keylen/8;
1343 cse->mackey = mackey;
1344 cse->mackeylen = mackeylen/8;
1346 cse->cipher = cipher;
1348 cse->txform = txform;
1350 mtx_lock(&fcr->lock);
1351 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1352 cse->ses = fcr->sesn++;
1353 mtx_unlock(&fcr->lock);
1358 csefree(struct csession *cse)
1362 if (!refcount_release(&cse->refs))
1364 error = crypto_freesession(cse->sid);
1365 mtx_destroy(&cse->lock);
1367 free(cse->key, M_XDATA);
1369 free(cse->mackey, M_XDATA);
1375 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1381 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1387 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1393 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1401 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1402 TAILQ_INIT(&fcr->csessions);
1403 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1405 error = falloc(td, &f, &fd, 0);
1408 mtx_destroy(&fcr->lock);
1412 /* falloc automatically provides an extra reference to 'f'. */
1413 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1414 *(u_int32_t *)data = fd;
1418 error = cryptodev_find((struct crypt_find_op *)data);
1421 error = crypto_getfeat((int *)data);
1430 static struct cdevsw crypto_cdevsw = {
1431 .d_version = D_VERSION,
1432 .d_flags = D_NEEDGIANT,
1433 .d_open = cryptoopen,
1434 .d_read = cryptoread,
1435 .d_write = cryptowrite,
1436 .d_ioctl = cryptoioctl,
1439 static struct cdev *crypto_dev;
1442 * Initialization code, both for static and dynamic loading.
1445 cryptodev_modevent(module_t mod, int type, void *unused)
1450 printf("crypto: <crypto device>\n");
1451 crypto_dev = make_dev(&crypto_cdevsw, 0,
1452 UID_ROOT, GID_WHEEL, 0666,
1456 /*XXX disallow if active sessions */
1457 destroy_dev(crypto_dev);
1463 static moduledata_t cryptodev_mod = {
1468 MODULE_VERSION(cryptodev, 1);
1469 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1470 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1471 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);