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;
497 thash = &auth_hash_blake2b;
500 thash = &auth_hash_blake2s;
504 CRYPTDEB("invalid mac");
505 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
509 bzero(&crie, sizeof(crie));
510 bzero(&cria, sizeof(cria));
513 crie.cri_alg = txform->type;
514 crie.cri_klen = sop->keylen * 8;
515 if (sop->keylen > txform->maxkey ||
516 sop->keylen < txform->minkey) {
517 CRYPTDEB("invalid cipher parameters");
519 SDT_PROBE1(opencrypto, dev, ioctl, error,
524 crie.cri_key = malloc(crie.cri_klen / 8,
526 if ((error = copyin(sop->key, crie.cri_key,
527 crie.cri_klen / 8))) {
528 CRYPTDEB("invalid key");
529 SDT_PROBE1(opencrypto, dev, ioctl, error,
534 crie.cri_next = &cria;
538 cria.cri_alg = thash->type;
539 cria.cri_klen = sop->mackeylen * 8;
540 if (thash->keysize != 0 &&
541 sop->mackeylen > thash->keysize) {
542 CRYPTDEB("invalid mac key length");
544 SDT_PROBE1(opencrypto, dev, ioctl, error,
550 cria.cri_key = malloc(cria.cri_klen / 8,
552 if ((error = copyin(sop->mackey, cria.cri_key,
553 cria.cri_klen / 8))) {
554 CRYPTDEB("invalid mac key");
555 SDT_PROBE1(opencrypto, dev, ioctl,
562 /* NB: CIOCGSESSION2 has the crid */
563 if (cmd == CIOCGSESSION2
564 #ifdef COMPAT_FREEBSD32
565 || cmd == CIOCGSESSION232
568 crid = SES2(sop)->crid;
569 error = checkforsoftware(&crid);
571 CRYPTDEB("checkforsoftware");
572 SDT_PROBE1(opencrypto, dev, ioctl, error,
577 crid = CRYPTOCAP_F_HARDWARE;
578 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
580 CRYPTDEB("crypto_newsession");
581 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
585 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
586 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
590 crypto_freesession(sid);
592 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
593 CRYPTDEB("csecreate");
597 if (cmd == CIOCGSESSION2
598 #ifdef COMPAT_FREEBSD32
599 || cmd == CIOCGSESSION232
602 /* return hardware/driver id */
603 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
608 free(crie.cri_key, M_XDATA);
610 free(cria.cri_key, M_XDATA);
612 #ifdef COMPAT_FREEBSD32
614 if (cmd == CIOCGSESSION32)
615 session_op_to_32(sop, data);
616 else if (cmd == CIOCGSESSION232)
617 session2_op_to_32((struct session2_op *)sop,
623 ses = *(u_int32_t *)data;
624 cse = csefind(fcr, ses);
626 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
630 error = csefree(cse);
633 #ifdef COMPAT_FREEBSD32
635 if (cmd == CIOCCRYPT32) {
637 crypt_op_from_32(data, cop);
640 cop = (struct crypt_op *)data;
641 cse = csefind(fcr, cop->ses);
643 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
646 error = cryptodev_op(cse, cop, active_cred, td);
647 #ifdef COMPAT_FREEBSD32
648 if (error == 0 && cmd == CIOCCRYPT32)
649 crypt_op_to_32(cop, data);
654 #ifdef COMPAT_FREEBSD32
658 if (!crypto_userasymcrypto) {
659 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
660 return (EPERM); /* XXX compat? */
662 #ifdef COMPAT_FREEBSD32
663 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
665 crypt_kop_from_32(data, kop);
668 kop = (struct crypt_kop *)data;
670 #ifdef COMPAT_FREEBSD32
674 /* NB: crypto core enforces s/w driver use */
676 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
679 error = cryptodev_key(kop);
681 #ifdef COMPAT_FREEBSD32
682 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
683 crypt_kop_to_32(kop, data);
687 if (!crypto_userasymcrypto) {
689 * NB: if user asym crypto operations are
690 * not permitted return "no algorithms"
691 * so well-behaved applications will just
692 * fallback to doing them in software.
696 error = crypto_getfeat((int *)data);
698 SDT_PROBE1(opencrypto, dev, ioctl, error,
703 error = cryptodev_find((struct crypt_find_op *)data);
706 caead = (struct crypt_aead *)data;
707 cse = csefind(fcr, caead->ses);
709 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
712 error = cryptodev_aead(cse, caead, active_cred, td);
716 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
723 static int cryptodev_cb(struct cryptop *);
725 static struct cryptop_data *
726 cod_alloc(struct csession *cse, size_t len, struct thread *td)
728 struct cryptop_data *cod;
731 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
735 uio->uio_iov = cod->iovec;
737 uio->uio_resid = len;
738 uio->uio_segflg = UIO_SYSSPACE;
739 uio->uio_rw = UIO_WRITE;
741 uio->uio_iov[0].iov_len = len;
742 uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
747 cod_free(struct cryptop_data *cod)
750 free(cod->uio.uio_iov[0].iov_base, M_XDATA);
756 struct csession *cse,
757 struct crypt_op *cop,
758 struct ucred *active_cred,
761 struct cryptop_data *cod = NULL;
762 struct cryptop *crp = NULL;
763 struct cryptodesc *crde = NULL, *crda = NULL;
766 if (cop->len > 256*1024-4) {
767 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
772 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
773 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
779 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
781 cod = cod_alloc(cse, cop->len, td);
783 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
785 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
790 if (cse->thash && cse->txform) {
791 if (cop->flags & COP_F_CIPHER_FIRST) {
792 crde = crp->crp_desc;
793 crda = crde->crd_next;
795 crda = crp->crp_desc;
796 crde = crda->crd_next;
798 } else if (cse->thash) {
799 crda = crp->crp_desc;
800 } else if (cse->txform) {
801 crde = crp->crp_desc;
803 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
808 if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
810 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
816 crda->crd_len = cop->len;
817 crda->crd_inject = cop->len;
819 crda->crd_alg = cse->mac;
820 crda->crd_key = cse->mackey;
821 crda->crd_klen = cse->mackeylen * 8;
825 if (cop->op == COP_ENCRYPT)
826 crde->crd_flags |= CRD_F_ENCRYPT;
828 crde->crd_flags &= ~CRD_F_ENCRYPT;
829 crde->crd_len = cop->len;
830 crde->crd_inject = 0;
832 crde->crd_alg = cse->cipher;
833 crde->crd_key = cse->key;
834 crde->crd_klen = cse->keylen * 8;
837 crp->crp_ilen = cop->len;
838 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
839 | (cop->flags & COP_F_BATCH);
840 crp->crp_uio = &cod->uio;
841 crp->crp_callback = cryptodev_cb;
842 crp->crp_sid = cse->sid;
843 crp->crp_opaque = cod;
847 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
851 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
852 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
856 if ((error = copyin(cop->iv, crde->crd_iv,
857 cse->txform->blocksize))) {
858 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
861 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
863 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
866 crde->crd_flags |= CRD_F_IV_PRESENT;
867 crde->crd_skip = cse->txform->blocksize;
868 crde->crd_len -= cse->txform->blocksize;
871 if (cop->mac && crda == NULL) {
872 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
879 * Let the dispatch run unlocked, then, interlock against the
880 * callback before checking if the operation completed and going
881 * to sleep. This insures drivers don't inherit our lock which
882 * results in a lock order reversal between crypto_dispatch forced
883 * entry and the crypto_done callback into us.
885 error = crypto_dispatch(crp);
887 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
891 mtx_lock(&cse->lock);
893 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
894 mtx_unlock(&cse->lock);
896 if (crp->crp_etype == EAGAIN) {
898 crp->crp_flags &= ~CRYPTO_F_DONE;
903 if (crp->crp_etype != 0) {
904 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
905 error = crp->crp_etype;
910 (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
912 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
917 (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
918 cop->mac, cse->thash->hashsize))) {
919 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
934 struct csession *cse,
935 struct crypt_aead *caead,
936 struct ucred *active_cred,
939 struct cryptop_data *cod = NULL;
940 struct cryptop *crp = NULL;
941 struct cryptodesc *crde = NULL, *crda = NULL;
944 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
945 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
949 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
950 (caead->len % cse->txform->blocksize) != 0) {
951 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
955 cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
958 crp = crypto_getreq(2);
961 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
965 if (caead->flags & COP_F_CIPHER_FIRST) {
966 crde = crp->crp_desc;
967 crda = crde->crd_next;
969 crda = crp->crp_desc;
970 crde = crda->crd_next;
973 if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
975 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
979 if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
980 caead->aadlen, caead->len))) {
981 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
986 * For GCM, crd_len covers only the AAD. For other ciphers
987 * chained with an HMAC, crd_len covers both the AAD and the
991 if (cse->cipher == CRYPTO_AES_NIST_GCM_16)
992 crda->crd_len = caead->aadlen;
994 crda->crd_len = caead->aadlen + caead->len;
995 crda->crd_inject = caead->aadlen + caead->len;
997 crda->crd_alg = cse->mac;
998 crda->crd_key = cse->mackey;
999 crda->crd_klen = cse->mackeylen * 8;
1001 if (caead->op == COP_ENCRYPT)
1002 crde->crd_flags |= CRD_F_ENCRYPT;
1004 crde->crd_flags &= ~CRD_F_ENCRYPT;
1005 crde->crd_skip = caead->aadlen;
1006 crde->crd_len = caead->len;
1007 crde->crd_inject = caead->aadlen;
1009 crde->crd_alg = cse->cipher;
1010 crde->crd_key = cse->key;
1011 crde->crd_klen = cse->keylen * 8;
1013 crp->crp_ilen = caead->aadlen + caead->len;
1014 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1015 | (caead->flags & COP_F_BATCH);
1016 crp->crp_uio = &cod->uio;
1017 crp->crp_callback = cryptodev_cb;
1018 crp->crp_sid = cse->sid;
1019 crp->crp_opaque = cod;
1022 if (caead->ivlen > sizeof(crde->crd_iv)) {
1024 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1028 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1029 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1032 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1034 crde->crd_flags |= CRD_F_IV_PRESENT;
1035 crde->crd_skip += cse->txform->blocksize;
1036 crde->crd_len -= cse->txform->blocksize;
1039 if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1040 caead->len + caead->aadlen, cse->thash->hashsize))) {
1041 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1046 * Let the dispatch run unlocked, then, interlock against the
1047 * callback before checking if the operation completed and going
1048 * to sleep. This insures drivers don't inherit our lock which
1049 * results in a lock order reversal between crypto_dispatch forced
1050 * entry and the crypto_done callback into us.
1052 error = crypto_dispatch(crp);
1054 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1058 mtx_lock(&cse->lock);
1060 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1061 mtx_unlock(&cse->lock);
1063 if (crp->crp_etype == EAGAIN) {
1065 crp->crp_flags &= ~CRYPTO_F_DONE;
1070 if (crp->crp_etype != 0) {
1071 error = crp->crp_etype;
1072 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1076 if (caead->dst && (error = copyout(
1077 (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1079 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1083 if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1084 caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1085 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1090 crypto_freereq(crp);
1098 cryptodev_cb(struct cryptop *crp)
1100 struct cryptop_data *cod = crp->crp_opaque;
1103 * Lock to ensure the wakeup() is not missed by the loops
1104 * waiting on cod->done in cryptodev_op() and
1107 mtx_lock(&cod->cse->lock);
1109 mtx_unlock(&cod->cse->lock);
1115 cryptodevkey_cb(void *op)
1117 struct cryptkop *krp = (struct cryptkop *) op;
1124 cryptodev_key(struct crypt_kop *kop)
1126 struct cryptkop *krp = NULL;
1128 int in, out, size, i;
1130 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1131 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1135 in = kop->crk_iparams;
1136 out = kop->crk_oparams;
1137 switch (kop->crk_op) {
1139 if (in == 3 && out == 1)
1141 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1143 case CRK_MOD_EXP_CRT:
1144 if (in == 6 && out == 1)
1146 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1149 if (in == 5 && out == 2)
1151 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1153 case CRK_DSA_VERIFY:
1154 if (in == 7 && out == 0)
1156 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1158 case CRK_DH_COMPUTE_KEY:
1159 if (in == 3 && out == 1)
1161 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1164 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1168 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1170 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1173 krp->krp_op = kop->crk_op;
1174 krp->krp_status = kop->crk_status;
1175 krp->krp_iparams = kop->crk_iparams;
1176 krp->krp_oparams = kop->crk_oparams;
1177 krp->krp_crid = kop->crk_crid;
1178 krp->krp_status = 0;
1179 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1181 for (i = 0; i < CRK_MAXPARAM; i++) {
1182 if (kop->crk_param[i].crp_nbits > 65536) {
1183 /* Limit is the same as in OpenBSD */
1184 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1187 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1189 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1190 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1193 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1194 if (i >= krp->krp_iparams)
1196 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1198 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1203 error = crypto_kdispatch(krp);
1205 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1208 error = tsleep(krp, PSOCK, "crydev", 0);
1210 /* XXX can this happen? if so, how do we recover? */
1211 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1215 kop->crk_crid = krp->krp_crid; /* device that did the work */
1216 if (krp->krp_status != 0) {
1217 error = krp->krp_status;
1218 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1222 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1223 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1226 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1228 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1235 kop->crk_status = krp->krp_status;
1236 for (i = 0; i < CRK_MAXPARAM; i++) {
1237 if (krp->krp_param[i].crp_p)
1238 free(krp->krp_param[i].crp_p, M_XDATA);
1246 cryptodev_find(struct crypt_find_op *find)
1249 size_t fnlen = sizeof find->name;
1251 if (find->crid != -1) {
1252 dev = crypto_find_device_byhid(find->crid);
1255 strncpy(find->name, device_get_nameunit(dev), fnlen);
1256 find->name[fnlen - 1] = '\x0';
1258 find->name[fnlen - 1] = '\x0';
1259 find->crid = crypto_find_driver(find->name);
1260 if (find->crid == -1)
1271 struct ucred *active_cred,
1275 return (EOPNOTSUPP);
1280 cryptof_close(struct file *fp, struct thread *td)
1282 struct fcrypt *fcr = fp->f_data;
1283 struct csession *cse;
1285 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1286 TAILQ_REMOVE(&fcr->csessions, cse, next);
1295 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1298 kif->kf_type = KF_TYPE_CRYPTO;
1302 static struct csession *
1303 csefind(struct fcrypt *fcr, u_int ses)
1305 struct csession *cse;
1307 TAILQ_FOREACH(cse, &fcr->csessions, next)
1308 if (cse->ses == ses)
1314 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1316 struct csession *cse;
1318 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1319 if (cse == cse_del) {
1320 TAILQ_REMOVE(&fcr->csessions, cse, next);
1327 static struct csession *
1328 cseadd(struct fcrypt *fcr, struct csession *cse)
1330 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1331 cse->ses = fcr->sesn++;
1336 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
1337 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1338 struct enc_xform *txform, struct auth_hash *thash)
1340 struct csession *cse;
1342 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1345 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1347 cse->keylen = keylen/8;
1348 cse->mackey = mackey;
1349 cse->mackeylen = mackeylen/8;
1351 cse->cipher = cipher;
1353 cse->txform = txform;
1360 csefree(struct csession *cse)
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);
1402 TAILQ_INIT(&fcr->csessions);
1405 error = falloc(td, &f, &fd, 0);
1411 /* falloc automatically provides an extra reference to 'f'. */
1412 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1413 *(u_int32_t *)data = fd;
1417 error = cryptodev_find((struct crypt_find_op *)data);
1420 error = crypto_getfeat((int *)data);
1429 static struct cdevsw crypto_cdevsw = {
1430 .d_version = D_VERSION,
1431 .d_flags = D_NEEDGIANT,
1432 .d_open = cryptoopen,
1433 .d_read = cryptoread,
1434 .d_write = cryptowrite,
1435 .d_ioctl = cryptoioctl,
1438 static struct cdev *crypto_dev;
1441 * Initialization code, both for static and dynamic loading.
1444 cryptodev_modevent(module_t mod, int type, void *unused)
1449 printf("crypto: <crypto device>\n");
1450 crypto_dev = make_dev(&crypto_cdevsw, 0,
1451 UID_ROOT, GID_WHEEL, 0666,
1455 /*XXX disallow if active sessions */
1456 destroy_dev(crypto_dev);
1462 static moduledata_t cryptodev_mod = {
1467 MODULE_VERSION(cryptodev, 1);
1468 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1469 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1470 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);