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;
272 struct mtx lock; /* for op submission */
275 struct enc_xform *txform;
277 struct auth_hash *thash;
286 struct cryptop_data {
287 struct csession *cse;
289 struct iovec iovec[1];
295 TAILQ_HEAD(csessionlist, csession) csessions;
299 static int cryptof_ioctl(struct file *, u_long, void *,
300 struct ucred *, struct thread *);
301 static int cryptof_stat(struct file *, struct stat *,
302 struct ucred *, struct thread *);
303 static int cryptof_close(struct file *, struct thread *);
304 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
307 static struct fileops cryptofops = {
308 .fo_read = invfo_rdwr,
309 .fo_write = invfo_rdwr,
310 .fo_truncate = invfo_truncate,
311 .fo_ioctl = cryptof_ioctl,
312 .fo_poll = invfo_poll,
313 .fo_kqfilter = invfo_kqfilter,
314 .fo_stat = cryptof_stat,
315 .fo_close = cryptof_close,
316 .fo_chmod = invfo_chmod,
317 .fo_chown = invfo_chown,
318 .fo_sendfile = invfo_sendfile,
319 .fo_fill_kinfo = cryptof_fill_kinfo,
322 static struct csession *csefind(struct fcrypt *, u_int);
323 static int csedelete(struct fcrypt *, struct csession *);
324 static struct csession *cseadd(struct fcrypt *, struct csession *);
325 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
326 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
328 static int csefree(struct csession *);
330 static int cryptodev_op(struct csession *, struct crypt_op *,
331 struct ucred *, struct thread *td);
332 static int cryptodev_aead(struct csession *, struct crypt_aead *,
333 struct ucred *, struct thread *);
334 static int cryptodev_key(struct crypt_kop *);
335 static int cryptodev_find(struct crypt_find_op *);
338 * Check a crypto identifier to see if it requested
339 * a software device/driver. This can be done either
340 * by device name/class or through search constraints.
343 checkforsoftware(int *cridp)
349 if (!crypto_devallowsoft) {
350 if (crid & CRYPTOCAP_F_SOFTWARE) {
351 if (crid & CRYPTOCAP_F_HARDWARE) {
352 *cridp = CRYPTOCAP_F_HARDWARE;
357 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
358 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
370 struct ucred *active_cred,
373 #define SES2(p) ((struct session2_op *)p)
374 struct cryptoini cria, crie;
375 struct fcrypt *fcr = fp->f_data;
376 struct csession *cse;
377 struct session_op *sop;
378 struct crypt_op *cop;
379 struct crypt_aead *caead;
380 struct enc_xform *txform = NULL;
381 struct auth_hash *thash = NULL;
382 struct crypt_kop *kop;
386 #ifdef COMPAT_FREEBSD32
387 struct session2_op sopc;
388 struct crypt_op copc;
389 struct crypt_kop kopc;
395 #ifdef COMPAT_FREEBSD32
397 case CIOCGSESSION232:
398 if (cmd == CIOCGSESSION32) {
399 session_op_from_32(data, (struct session_op *)&sopc);
400 sop = (struct session_op *)&sopc;
401 } else if (cmd == CIOCGSESSION232) {
402 session2_op_from_32(data, &sopc);
403 sop = (struct session_op *)&sopc;
406 sop = (struct session_op *)data;
407 switch (sop->cipher) {
411 txform = &enc_xform_des;
413 case CRYPTO_3DES_CBC:
414 txform = &enc_xform_3des;
417 txform = &enc_xform_blf;
419 case CRYPTO_CAST_CBC:
420 txform = &enc_xform_cast5;
422 case CRYPTO_SKIPJACK_CBC:
423 txform = &enc_xform_skipjack;
426 txform = &enc_xform_rijndael128;
429 txform = &enc_xform_aes_xts;
431 case CRYPTO_NULL_CBC:
432 txform = &enc_xform_null;
435 txform = &enc_xform_arc4;
437 case CRYPTO_CAMELLIA_CBC:
438 txform = &enc_xform_camellia;
441 txform = &enc_xform_aes_icm;
443 case CRYPTO_AES_NIST_GCM_16:
444 txform = &enc_xform_aes_nist_gcm;
448 CRYPTDEB("invalid cipher");
449 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
456 case CRYPTO_MD5_HMAC:
457 thash = &auth_hash_hmac_md5;
459 case CRYPTO_SHA1_HMAC:
460 thash = &auth_hash_hmac_sha1;
462 case CRYPTO_SHA2_256_HMAC:
463 thash = &auth_hash_hmac_sha2_256;
465 case CRYPTO_SHA2_384_HMAC:
466 thash = &auth_hash_hmac_sha2_384;
468 case CRYPTO_SHA2_512_HMAC:
469 thash = &auth_hash_hmac_sha2_512;
471 case CRYPTO_RIPEMD160_HMAC:
472 thash = &auth_hash_hmac_ripemd_160;
474 case CRYPTO_AES_128_NIST_GMAC:
475 thash = &auth_hash_nist_gmac_aes_128;
477 case CRYPTO_AES_192_NIST_GMAC:
478 thash = &auth_hash_nist_gmac_aes_192;
480 case CRYPTO_AES_256_NIST_GMAC:
481 thash = &auth_hash_nist_gmac_aes_256;
486 thash = &auth_hash_md5;
489 thash = &auth_hash_sha1;
492 case CRYPTO_NULL_HMAC:
493 thash = &auth_hash_null;
496 CRYPTDEB("invalid mac");
497 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
501 bzero(&crie, sizeof(crie));
502 bzero(&cria, sizeof(cria));
505 crie.cri_alg = txform->type;
506 crie.cri_klen = sop->keylen * 8;
507 if (sop->keylen > txform->maxkey ||
508 sop->keylen < txform->minkey) {
509 CRYPTDEB("invalid cipher parameters");
511 SDT_PROBE1(opencrypto, dev, ioctl, error,
516 crie.cri_key = malloc(crie.cri_klen / 8,
518 if ((error = copyin(sop->key, crie.cri_key,
519 crie.cri_klen / 8))) {
520 CRYPTDEB("invalid key");
521 SDT_PROBE1(opencrypto, dev, ioctl, error,
526 crie.cri_next = &cria;
530 cria.cri_alg = thash->type;
531 cria.cri_klen = sop->mackeylen * 8;
532 if (sop->mackeylen != thash->keysize) {
533 CRYPTDEB("invalid mac key length");
535 SDT_PROBE1(opencrypto, dev, ioctl, error,
541 cria.cri_key = malloc(cria.cri_klen / 8,
543 if ((error = copyin(sop->mackey, cria.cri_key,
544 cria.cri_klen / 8))) {
545 CRYPTDEB("invalid mac key");
546 SDT_PROBE1(opencrypto, dev, ioctl,
553 /* NB: CIOCGSESSION2 has the crid */
554 if (cmd == CIOCGSESSION2
555 #ifdef COMPAT_FREEBSD32
556 || cmd == CIOCGSESSION232
559 crid = SES2(sop)->crid;
560 error = checkforsoftware(&crid);
562 CRYPTDEB("checkforsoftware");
563 SDT_PROBE1(opencrypto, dev, ioctl, error,
568 crid = CRYPTOCAP_F_HARDWARE;
569 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
571 CRYPTDEB("crypto_newsession");
572 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
576 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
577 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
581 crypto_freesession(sid);
583 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
584 CRYPTDEB("csecreate");
588 if (cmd == CIOCGSESSION2
589 #ifdef COMPAT_FREEBSD32
590 || cmd == CIOCGSESSION232
593 /* return hardware/driver id */
594 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
599 free(crie.cri_key, M_XDATA);
601 free(cria.cri_key, M_XDATA);
603 #ifdef COMPAT_FREEBSD32
605 if (cmd == CIOCGSESSION32)
606 session_op_to_32(sop, data);
607 else if (cmd == CIOCGSESSION232)
608 session2_op_to_32((struct session2_op *)sop,
614 ses = *(u_int32_t *)data;
615 cse = csefind(fcr, ses);
617 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
621 error = csefree(cse);
624 #ifdef COMPAT_FREEBSD32
626 if (cmd == CIOCCRYPT32) {
628 crypt_op_from_32(data, cop);
631 cop = (struct crypt_op *)data;
632 cse = csefind(fcr, cop->ses);
634 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
637 error = cryptodev_op(cse, cop, active_cred, td);
638 #ifdef COMPAT_FREEBSD32
639 if (error == 0 && cmd == CIOCCRYPT32)
640 crypt_op_to_32(cop, data);
645 #ifdef COMPAT_FREEBSD32
649 if (!crypto_userasymcrypto) {
650 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
651 return (EPERM); /* XXX compat? */
653 #ifdef COMPAT_FREEBSD32
654 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
656 crypt_kop_from_32(data, kop);
659 kop = (struct crypt_kop *)data;
661 #ifdef COMPAT_FREEBSD32
665 /* NB: crypto core enforces s/w driver use */
667 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
670 error = cryptodev_key(kop);
672 #ifdef COMPAT_FREEBSD32
673 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
674 crypt_kop_to_32(kop, data);
678 if (!crypto_userasymcrypto) {
680 * NB: if user asym crypto operations are
681 * not permitted return "no algorithms"
682 * so well-behaved applications will just
683 * fallback to doing them in software.
687 error = crypto_getfeat((int *)data);
689 SDT_PROBE1(opencrypto, dev, ioctl, error,
694 error = cryptodev_find((struct crypt_find_op *)data);
697 caead = (struct crypt_aead *)data;
698 cse = csefind(fcr, caead->ses);
700 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
703 error = cryptodev_aead(cse, caead, active_cred, td);
707 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
714 static int cryptodev_cb(struct cryptop *);
716 static struct cryptop_data *
717 cod_alloc(struct csession *cse, size_t len, struct thread *td)
719 struct cryptop_data *cod;
722 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
726 uio->uio_iov = cod->iovec;
728 uio->uio_resid = len;
729 uio->uio_segflg = UIO_SYSSPACE;
730 uio->uio_rw = UIO_WRITE;
732 uio->uio_iov[0].iov_len = len;
733 uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
738 cod_free(struct cryptop_data *cod)
741 free(cod->uio.uio_iov[0].iov_base, M_XDATA);
747 struct csession *cse,
748 struct crypt_op *cop,
749 struct ucred *active_cred,
752 struct cryptop_data *cod = NULL;
753 struct cryptop *crp = NULL;
754 struct cryptodesc *crde = NULL, *crda = NULL;
757 if (cop->len > 256*1024-4) {
758 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
763 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
764 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
770 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
772 cod = cod_alloc(cse, cop->len, td);
774 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
776 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
781 if (cse->thash && cse->txform) {
782 if (cop->flags & COP_F_CIPHER_FIRST) {
783 crde = crp->crp_desc;
784 crda = crde->crd_next;
786 crda = crp->crp_desc;
787 crde = crda->crd_next;
789 } else if (cse->thash) {
790 crda = crp->crp_desc;
791 } else if (cse->txform) {
792 crde = crp->crp_desc;
794 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
799 if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
801 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
807 crda->crd_len = cop->len;
808 crda->crd_inject = cop->len;
810 crda->crd_alg = cse->mac;
811 crda->crd_key = cse->mackey;
812 crda->crd_klen = cse->mackeylen * 8;
816 if (cop->op == COP_ENCRYPT)
817 crde->crd_flags |= CRD_F_ENCRYPT;
819 crde->crd_flags &= ~CRD_F_ENCRYPT;
820 crde->crd_len = cop->len;
821 crde->crd_inject = 0;
823 crde->crd_alg = cse->cipher;
824 crde->crd_key = cse->key;
825 crde->crd_klen = cse->keylen * 8;
828 crp->crp_ilen = cop->len;
829 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
830 | (cop->flags & COP_F_BATCH);
831 crp->crp_uio = &cod->uio;
832 crp->crp_callback = cryptodev_cb;
833 crp->crp_sid = cse->sid;
834 crp->crp_opaque = cod;
838 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
842 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
843 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
847 if ((error = copyin(cop->iv, crde->crd_iv,
848 cse->txform->blocksize))) {
849 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
852 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
854 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
857 crde->crd_flags |= CRD_F_IV_PRESENT;
858 crde->crd_skip = cse->txform->blocksize;
859 crde->crd_len -= cse->txform->blocksize;
862 if (cop->mac && crda == NULL) {
863 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
870 * Let the dispatch run unlocked, then, interlock against the
871 * callback before checking if the operation completed and going
872 * to sleep. This insures drivers don't inherit our lock which
873 * results in a lock order reversal between crypto_dispatch forced
874 * entry and the crypto_done callback into us.
876 error = crypto_dispatch(crp);
878 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
882 mtx_lock(&cse->lock);
884 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
885 mtx_unlock(&cse->lock);
887 if (crp->crp_etype == EAGAIN) {
889 crp->crp_flags &= ~CRYPTO_F_DONE;
894 if (crp->crp_etype != 0) {
895 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
896 error = crp->crp_etype;
901 (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
903 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
908 (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
909 cop->mac, cse->thash->hashsize))) {
910 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
925 struct csession *cse,
926 struct crypt_aead *caead,
927 struct ucred *active_cred,
930 struct cryptop_data *cod = NULL;
931 struct cryptop *crp = NULL;
932 struct cryptodesc *crde = NULL, *crda = NULL;
935 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
936 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
940 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
941 (caead->len % cse->txform->blocksize) != 0) {
942 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
946 cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
949 crp = crypto_getreq(2);
952 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
956 if (caead->flags & COP_F_CIPHER_FIRST) {
957 crde = crp->crp_desc;
958 crda = crde->crd_next;
960 crda = crp->crp_desc;
961 crde = crda->crd_next;
964 if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
966 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
970 if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
971 caead->aadlen, caead->len))) {
972 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
977 * For GCM, crd_len covers only the AAD. For other ciphers
978 * chained with an HMAC, crd_len covers both the AAD and the
982 if (cse->cipher == CRYPTO_AES_NIST_GCM_16)
983 crda->crd_len = caead->aadlen;
985 crda->crd_len = caead->aadlen + caead->len;
986 crda->crd_inject = caead->aadlen + caead->len;
988 crda->crd_alg = cse->mac;
989 crda->crd_key = cse->mackey;
990 crda->crd_klen = cse->mackeylen * 8;
992 if (caead->op == COP_ENCRYPT)
993 crde->crd_flags |= CRD_F_ENCRYPT;
995 crde->crd_flags &= ~CRD_F_ENCRYPT;
996 crde->crd_skip = caead->aadlen;
997 crde->crd_len = caead->len;
998 crde->crd_inject = caead->aadlen;
1000 crde->crd_alg = cse->cipher;
1001 crde->crd_key = cse->key;
1002 crde->crd_klen = cse->keylen * 8;
1004 crp->crp_ilen = caead->aadlen + caead->len;
1005 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1006 | (caead->flags & COP_F_BATCH);
1007 crp->crp_uio = &cod->uio;
1008 crp->crp_callback = cryptodev_cb;
1009 crp->crp_sid = cse->sid;
1010 crp->crp_opaque = cod;
1013 if (caead->ivlen > sizeof(crde->crd_iv)) {
1015 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1019 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1020 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1023 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1025 crde->crd_flags |= CRD_F_IV_PRESENT;
1026 crde->crd_skip += cse->txform->blocksize;
1027 crde->crd_len -= cse->txform->blocksize;
1030 if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1031 caead->len + caead->aadlen, cse->thash->hashsize))) {
1032 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1037 * Let the dispatch run unlocked, then, interlock against the
1038 * callback before checking if the operation completed and going
1039 * to sleep. This insures drivers don't inherit our lock which
1040 * results in a lock order reversal between crypto_dispatch forced
1041 * entry and the crypto_done callback into us.
1043 error = crypto_dispatch(crp);
1045 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1049 mtx_lock(&cse->lock);
1051 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1052 mtx_unlock(&cse->lock);
1054 if (crp->crp_etype == EAGAIN) {
1056 crp->crp_flags &= ~CRYPTO_F_DONE;
1061 if (crp->crp_etype != 0) {
1062 error = crp->crp_etype;
1063 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1067 if (caead->dst && (error = copyout(
1068 (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1070 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1074 if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1075 caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1076 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1081 crypto_freereq(crp);
1089 cryptodev_cb(struct cryptop *crp)
1091 struct cryptop_data *cod = crp->crp_opaque;
1094 * Lock to ensure the wakeup() is not missed by the loops
1095 * waiting on cod->done in cryptodev_op() and
1098 mtx_lock(&cod->cse->lock);
1100 mtx_unlock(&cod->cse->lock);
1106 cryptodevkey_cb(void *op)
1108 struct cryptkop *krp = (struct cryptkop *) op;
1115 cryptodev_key(struct crypt_kop *kop)
1117 struct cryptkop *krp = NULL;
1119 int in, out, size, i;
1121 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1122 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1126 in = kop->crk_iparams;
1127 out = kop->crk_oparams;
1128 switch (kop->crk_op) {
1130 if (in == 3 && out == 1)
1132 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1134 case CRK_MOD_EXP_CRT:
1135 if (in == 6 && out == 1)
1137 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1140 if (in == 5 && out == 2)
1142 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1144 case CRK_DSA_VERIFY:
1145 if (in == 7 && out == 0)
1147 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1149 case CRK_DH_COMPUTE_KEY:
1150 if (in == 3 && out == 1)
1152 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1155 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1159 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1161 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1164 krp->krp_op = kop->crk_op;
1165 krp->krp_status = kop->crk_status;
1166 krp->krp_iparams = kop->crk_iparams;
1167 krp->krp_oparams = kop->crk_oparams;
1168 krp->krp_crid = kop->crk_crid;
1169 krp->krp_status = 0;
1170 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1172 for (i = 0; i < CRK_MAXPARAM; i++) {
1173 if (kop->crk_param[i].crp_nbits > 65536) {
1174 /* Limit is the same as in OpenBSD */
1175 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1178 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1180 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1181 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1184 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1185 if (i >= krp->krp_iparams)
1187 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1189 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1194 error = crypto_kdispatch(krp);
1196 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1199 error = tsleep(krp, PSOCK, "crydev", 0);
1201 /* XXX can this happen? if so, how do we recover? */
1202 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1206 kop->crk_crid = krp->krp_crid; /* device that did the work */
1207 if (krp->krp_status != 0) {
1208 error = krp->krp_status;
1209 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1213 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1214 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1217 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1219 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1226 kop->crk_status = krp->krp_status;
1227 for (i = 0; i < CRK_MAXPARAM; i++) {
1228 if (krp->krp_param[i].crp_p)
1229 free(krp->krp_param[i].crp_p, M_XDATA);
1237 cryptodev_find(struct crypt_find_op *find)
1240 size_t fnlen = sizeof find->name;
1242 if (find->crid != -1) {
1243 dev = crypto_find_device_byhid(find->crid);
1246 strncpy(find->name, device_get_nameunit(dev), fnlen);
1247 find->name[fnlen - 1] = '\x0';
1249 find->name[fnlen - 1] = '\x0';
1250 find->crid = crypto_find_driver(find->name);
1251 if (find->crid == -1)
1262 struct ucred *active_cred,
1266 return (EOPNOTSUPP);
1271 cryptof_close(struct file *fp, struct thread *td)
1273 struct fcrypt *fcr = fp->f_data;
1274 struct csession *cse;
1276 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1277 TAILQ_REMOVE(&fcr->csessions, cse, next);
1286 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1289 kif->kf_type = KF_TYPE_CRYPTO;
1293 static struct csession *
1294 csefind(struct fcrypt *fcr, u_int ses)
1296 struct csession *cse;
1298 TAILQ_FOREACH(cse, &fcr->csessions, next)
1299 if (cse->ses == ses)
1305 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1307 struct csession *cse;
1309 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1310 if (cse == cse_del) {
1311 TAILQ_REMOVE(&fcr->csessions, cse, next);
1318 static struct csession *
1319 cseadd(struct fcrypt *fcr, struct csession *cse)
1321 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1322 cse->ses = fcr->sesn++;
1327 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
1328 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1329 struct enc_xform *txform, struct auth_hash *thash)
1331 struct csession *cse;
1333 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1336 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1338 cse->keylen = keylen/8;
1339 cse->mackey = mackey;
1340 cse->mackeylen = mackeylen/8;
1342 cse->cipher = cipher;
1344 cse->txform = txform;
1351 csefree(struct csession *cse)
1355 error = crypto_freesession(cse->sid);
1356 mtx_destroy(&cse->lock);
1358 free(cse->key, M_XDATA);
1360 free(cse->mackey, M_XDATA);
1366 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1372 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1378 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1384 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1392 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1393 TAILQ_INIT(&fcr->csessions);
1396 error = falloc(td, &f, &fd, 0);
1402 /* falloc automatically provides an extra reference to 'f'. */
1403 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1404 *(u_int32_t *)data = fd;
1408 error = cryptodev_find((struct crypt_find_op *)data);
1411 error = crypto_getfeat((int *)data);
1420 static struct cdevsw crypto_cdevsw = {
1421 .d_version = D_VERSION,
1422 .d_flags = D_NEEDGIANT,
1423 .d_open = cryptoopen,
1424 .d_read = cryptoread,
1425 .d_write = cryptowrite,
1426 .d_ioctl = cryptoioctl,
1429 static struct cdev *crypto_dev;
1432 * Initialization code, both for static and dynamic loading.
1435 cryptodev_modevent(module_t mod, int type, void *unused)
1440 printf("crypto: <crypto device>\n");
1441 crypto_dev = make_dev(&crypto_cdevsw, 0,
1442 UID_ROOT, GID_WHEEL, 0666,
1446 /*XXX disallow if active sessions */
1447 destroy_dev(crypto_dev);
1453 static moduledata_t cryptodev_mod = {
1458 MODULE_VERSION(cryptodev, 1);
1459 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1460 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1461 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);