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 (thash->keysize != 0 &&
533 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 cse = csefind(fcr, ses);
618 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
622 error = csefree(cse);
625 #ifdef COMPAT_FREEBSD32
627 if (cmd == CIOCCRYPT32) {
629 crypt_op_from_32(data, cop);
632 cop = (struct crypt_op *)data;
633 cse = csefind(fcr, cop->ses);
635 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
638 error = cryptodev_op(cse, cop, active_cred, td);
639 #ifdef COMPAT_FREEBSD32
640 if (error == 0 && cmd == CIOCCRYPT32)
641 crypt_op_to_32(cop, data);
646 #ifdef COMPAT_FREEBSD32
650 if (!crypto_userasymcrypto) {
651 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
652 return (EPERM); /* XXX compat? */
654 #ifdef COMPAT_FREEBSD32
655 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
657 crypt_kop_from_32(data, kop);
660 kop = (struct crypt_kop *)data;
662 #ifdef COMPAT_FREEBSD32
666 /* NB: crypto core enforces s/w driver use */
668 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
671 error = cryptodev_key(kop);
673 #ifdef COMPAT_FREEBSD32
674 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
675 crypt_kop_to_32(kop, data);
679 if (!crypto_userasymcrypto) {
681 * NB: if user asym crypto operations are
682 * not permitted return "no algorithms"
683 * so well-behaved applications will just
684 * fallback to doing them in software.
688 error = crypto_getfeat((int *)data);
690 SDT_PROBE1(opencrypto, dev, ioctl, error,
695 error = cryptodev_find((struct crypt_find_op *)data);
698 caead = (struct crypt_aead *)data;
699 cse = csefind(fcr, caead->ses);
701 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
704 error = cryptodev_aead(cse, caead, active_cred, td);
708 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
715 static int cryptodev_cb(struct cryptop *);
717 static struct cryptop_data *
718 cod_alloc(struct csession *cse, size_t len, struct thread *td)
720 struct cryptop_data *cod;
723 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
727 uio->uio_iov = cod->iovec;
729 uio->uio_resid = len;
730 uio->uio_segflg = UIO_SYSSPACE;
731 uio->uio_rw = UIO_WRITE;
733 uio->uio_iov[0].iov_len = len;
734 uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
739 cod_free(struct cryptop_data *cod)
742 free(cod->uio.uio_iov[0].iov_base, M_XDATA);
748 struct csession *cse,
749 struct crypt_op *cop,
750 struct ucred *active_cred,
753 struct cryptop_data *cod = NULL;
754 struct cryptop *crp = NULL;
755 struct cryptodesc *crde = NULL, *crda = NULL;
758 if (cop->len > 256*1024-4) {
759 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
764 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
765 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
771 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
773 cod = cod_alloc(cse, cop->len, td);
775 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
777 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
782 if (cse->thash && cse->txform) {
783 if (cop->flags & COP_F_CIPHER_FIRST) {
784 crde = crp->crp_desc;
785 crda = crde->crd_next;
787 crda = crp->crp_desc;
788 crde = crda->crd_next;
790 } else if (cse->thash) {
791 crda = crp->crp_desc;
792 } else if (cse->txform) {
793 crde = crp->crp_desc;
795 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
800 if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
802 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
808 crda->crd_len = cop->len;
809 crda->crd_inject = cop->len;
811 crda->crd_alg = cse->mac;
812 crda->crd_key = cse->mackey;
813 crda->crd_klen = cse->mackeylen * 8;
817 if (cop->op == COP_ENCRYPT)
818 crde->crd_flags |= CRD_F_ENCRYPT;
820 crde->crd_flags &= ~CRD_F_ENCRYPT;
821 crde->crd_len = cop->len;
822 crde->crd_inject = 0;
824 crde->crd_alg = cse->cipher;
825 crde->crd_key = cse->key;
826 crde->crd_klen = cse->keylen * 8;
829 crp->crp_ilen = cop->len;
830 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
831 | (cop->flags & COP_F_BATCH);
832 crp->crp_uio = &cod->uio;
833 crp->crp_callback = cryptodev_cb;
834 crp->crp_sid = cse->sid;
835 crp->crp_opaque = cod;
839 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
843 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
844 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
848 if ((error = copyin(cop->iv, crde->crd_iv,
849 cse->txform->blocksize))) {
850 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
853 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
855 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
858 crde->crd_flags |= CRD_F_IV_PRESENT;
859 crde->crd_skip = cse->txform->blocksize;
860 crde->crd_len -= cse->txform->blocksize;
863 if (cop->mac && crda == NULL) {
864 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
871 * Let the dispatch run unlocked, then, interlock against the
872 * callback before checking if the operation completed and going
873 * to sleep. This insures drivers don't inherit our lock which
874 * results in a lock order reversal between crypto_dispatch forced
875 * entry and the crypto_done callback into us.
877 error = crypto_dispatch(crp);
879 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
883 mtx_lock(&cse->lock);
885 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
886 mtx_unlock(&cse->lock);
888 if (crp->crp_etype == EAGAIN) {
890 crp->crp_flags &= ~CRYPTO_F_DONE;
895 if (crp->crp_etype != 0) {
896 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
897 error = crp->crp_etype;
902 (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
904 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
909 (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
910 cop->mac, cse->thash->hashsize))) {
911 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
926 struct csession *cse,
927 struct crypt_aead *caead,
928 struct ucred *active_cred,
931 struct cryptop_data *cod = NULL;
932 struct cryptop *crp = NULL;
933 struct cryptodesc *crde = NULL, *crda = NULL;
936 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
937 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
941 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
942 (caead->len % cse->txform->blocksize) != 0) {
943 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
947 cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
950 crp = crypto_getreq(2);
953 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
957 if (caead->flags & COP_F_CIPHER_FIRST) {
958 crde = crp->crp_desc;
959 crda = crde->crd_next;
961 crda = crp->crp_desc;
962 crde = crda->crd_next;
965 if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
967 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
971 if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
972 caead->aadlen, caead->len))) {
973 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
978 * For GCM, crd_len covers only the AAD. For other ciphers
979 * chained with an HMAC, crd_len covers both the AAD and the
983 if (cse->cipher == CRYPTO_AES_NIST_GCM_16)
984 crda->crd_len = caead->aadlen;
986 crda->crd_len = caead->aadlen + caead->len;
987 crda->crd_inject = caead->aadlen + caead->len;
989 crda->crd_alg = cse->mac;
990 crda->crd_key = cse->mackey;
991 crda->crd_klen = cse->mackeylen * 8;
993 if (caead->op == COP_ENCRYPT)
994 crde->crd_flags |= CRD_F_ENCRYPT;
996 crde->crd_flags &= ~CRD_F_ENCRYPT;
997 crde->crd_skip = caead->aadlen;
998 crde->crd_len = caead->len;
999 crde->crd_inject = caead->aadlen;
1001 crde->crd_alg = cse->cipher;
1002 crde->crd_key = cse->key;
1003 crde->crd_klen = cse->keylen * 8;
1005 crp->crp_ilen = caead->aadlen + caead->len;
1006 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1007 | (caead->flags & COP_F_BATCH);
1008 crp->crp_uio = &cod->uio;
1009 crp->crp_callback = cryptodev_cb;
1010 crp->crp_sid = cse->sid;
1011 crp->crp_opaque = cod;
1014 if (caead->ivlen > sizeof(crde->crd_iv)) {
1016 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1020 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1021 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1024 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1026 crde->crd_flags |= CRD_F_IV_PRESENT;
1027 crde->crd_skip += cse->txform->blocksize;
1028 crde->crd_len -= cse->txform->blocksize;
1031 if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1032 caead->len + caead->aadlen, cse->thash->hashsize))) {
1033 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1038 * Let the dispatch run unlocked, then, interlock against the
1039 * callback before checking if the operation completed and going
1040 * to sleep. This insures drivers don't inherit our lock which
1041 * results in a lock order reversal between crypto_dispatch forced
1042 * entry and the crypto_done callback into us.
1044 error = crypto_dispatch(crp);
1046 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1050 mtx_lock(&cse->lock);
1052 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1053 mtx_unlock(&cse->lock);
1055 if (crp->crp_etype == EAGAIN) {
1057 crp->crp_flags &= ~CRYPTO_F_DONE;
1062 if (crp->crp_etype != 0) {
1063 error = crp->crp_etype;
1064 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1068 if (caead->dst && (error = copyout(
1069 (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1071 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1075 if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1076 caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1077 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1082 crypto_freereq(crp);
1090 cryptodev_cb(struct cryptop *crp)
1092 struct cryptop_data *cod = crp->crp_opaque;
1095 * Lock to ensure the wakeup() is not missed by the loops
1096 * waiting on cod->done in cryptodev_op() and
1099 mtx_lock(&cod->cse->lock);
1101 mtx_unlock(&cod->cse->lock);
1107 cryptodevkey_cb(void *op)
1109 struct cryptkop *krp = (struct cryptkop *) op;
1116 cryptodev_key(struct crypt_kop *kop)
1118 struct cryptkop *krp = NULL;
1120 int in, out, size, i;
1122 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1123 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1127 in = kop->crk_iparams;
1128 out = kop->crk_oparams;
1129 switch (kop->crk_op) {
1131 if (in == 3 && out == 1)
1133 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1135 case CRK_MOD_EXP_CRT:
1136 if (in == 6 && out == 1)
1138 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1141 if (in == 5 && out == 2)
1143 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1145 case CRK_DSA_VERIFY:
1146 if (in == 7 && out == 0)
1148 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1150 case CRK_DH_COMPUTE_KEY:
1151 if (in == 3 && out == 1)
1153 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1156 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1160 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1162 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1165 krp->krp_op = kop->crk_op;
1166 krp->krp_status = kop->crk_status;
1167 krp->krp_iparams = kop->crk_iparams;
1168 krp->krp_oparams = kop->crk_oparams;
1169 krp->krp_crid = kop->crk_crid;
1170 krp->krp_status = 0;
1171 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1173 for (i = 0; i < CRK_MAXPARAM; i++) {
1174 if (kop->crk_param[i].crp_nbits > 65536) {
1175 /* Limit is the same as in OpenBSD */
1176 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1179 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1181 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1182 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1185 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1186 if (i >= krp->krp_iparams)
1188 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1190 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1195 error = crypto_kdispatch(krp);
1197 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1200 error = tsleep(krp, PSOCK, "crydev", 0);
1202 /* XXX can this happen? if so, how do we recover? */
1203 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1207 kop->crk_crid = krp->krp_crid; /* device that did the work */
1208 if (krp->krp_status != 0) {
1209 error = krp->krp_status;
1210 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1214 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1215 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1218 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1220 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1227 kop->crk_status = krp->krp_status;
1228 for (i = 0; i < CRK_MAXPARAM; i++) {
1229 if (krp->krp_param[i].crp_p)
1230 free(krp->krp_param[i].crp_p, M_XDATA);
1238 cryptodev_find(struct crypt_find_op *find)
1241 size_t fnlen = sizeof find->name;
1243 if (find->crid != -1) {
1244 dev = crypto_find_device_byhid(find->crid);
1247 strncpy(find->name, device_get_nameunit(dev), fnlen);
1248 find->name[fnlen - 1] = '\x0';
1250 find->name[fnlen - 1] = '\x0';
1251 find->crid = crypto_find_driver(find->name);
1252 if (find->crid == -1)
1263 struct ucred *active_cred,
1267 return (EOPNOTSUPP);
1272 cryptof_close(struct file *fp, struct thread *td)
1274 struct fcrypt *fcr = fp->f_data;
1275 struct csession *cse;
1277 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1278 TAILQ_REMOVE(&fcr->csessions, cse, next);
1287 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1290 kif->kf_type = KF_TYPE_CRYPTO;
1294 static struct csession *
1295 csefind(struct fcrypt *fcr, u_int ses)
1297 struct csession *cse;
1299 TAILQ_FOREACH(cse, &fcr->csessions, next)
1300 if (cse->ses == ses)
1306 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1308 struct csession *cse;
1310 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1311 if (cse == cse_del) {
1312 TAILQ_REMOVE(&fcr->csessions, cse, next);
1319 static struct csession *
1320 cseadd(struct fcrypt *fcr, struct csession *cse)
1322 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1323 cse->ses = fcr->sesn++;
1328 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
1329 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1330 struct enc_xform *txform, struct auth_hash *thash)
1332 struct csession *cse;
1334 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1337 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1339 cse->keylen = keylen/8;
1340 cse->mackey = mackey;
1341 cse->mackeylen = mackeylen/8;
1343 cse->cipher = cipher;
1345 cse->txform = txform;
1352 csefree(struct csession *cse)
1356 error = crypto_freesession(cse->sid);
1357 mtx_destroy(&cse->lock);
1359 free(cse->key, M_XDATA);
1361 free(cse->mackey, M_XDATA);
1367 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1373 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1379 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1385 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1393 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1394 TAILQ_INIT(&fcr->csessions);
1397 error = falloc(td, &f, &fd, 0);
1403 /* falloc automatically provides an extra reference to 'f'. */
1404 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1405 *(u_int32_t *)data = fd;
1409 error = cryptodev_find((struct crypt_find_op *)data);
1412 error = crypto_getfeat((int *)data);
1421 static struct cdevsw crypto_cdevsw = {
1422 .d_version = D_VERSION,
1423 .d_flags = D_NEEDGIANT,
1424 .d_open = cryptoopen,
1425 .d_read = cryptoread,
1426 .d_write = cryptowrite,
1427 .d_ioctl = cryptoioctl,
1430 static struct cdev *crypto_dev;
1433 * Initialization code, both for static and dynamic loading.
1436 cryptodev_modevent(module_t mod, int type, void *unused)
1441 printf("crypto: <crypto device>\n");
1442 crypto_dev = make_dev(&crypto_cdevsw, 0,
1443 UID_ROOT, GID_WHEEL, 0666,
1447 /*XXX disallow if active sessions */
1448 destroy_dev(crypto_dev);
1454 static moduledata_t cryptodev_mod = {
1459 MODULE_VERSION(cryptodev, 1);
1460 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1461 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1462 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);