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;
291 TAILQ_HEAD(csessionlist, csession) csessions;
295 static int cryptof_ioctl(struct file *, u_long, void *,
296 struct ucred *, struct thread *);
297 static int cryptof_stat(struct file *, struct stat *,
298 struct ucred *, struct thread *);
299 static int cryptof_close(struct file *, struct thread *);
300 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
303 static struct fileops cryptofops = {
304 .fo_read = invfo_rdwr,
305 .fo_write = invfo_rdwr,
306 .fo_truncate = invfo_truncate,
307 .fo_ioctl = cryptof_ioctl,
308 .fo_poll = invfo_poll,
309 .fo_kqfilter = invfo_kqfilter,
310 .fo_stat = cryptof_stat,
311 .fo_close = cryptof_close,
312 .fo_chmod = invfo_chmod,
313 .fo_chown = invfo_chown,
314 .fo_sendfile = invfo_sendfile,
315 .fo_fill_kinfo = cryptof_fill_kinfo,
318 static struct csession *csefind(struct fcrypt *, u_int);
319 static int csedelete(struct fcrypt *, struct csession *);
320 static struct csession *cseadd(struct fcrypt *, struct csession *);
321 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
322 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
324 static int csefree(struct csession *);
326 static int cryptodev_op(struct csession *, struct crypt_op *,
327 struct ucred *, struct thread *td);
328 static int cryptodev_aead(struct csession *, struct crypt_aead *,
329 struct ucred *, struct thread *);
330 static int cryptodev_key(struct crypt_kop *);
331 static int cryptodev_find(struct crypt_find_op *);
334 * Check a crypto identifier to see if it requested
335 * a software device/driver. This can be done either
336 * by device name/class or through search constraints.
339 checkforsoftware(int *cridp)
345 if (!crypto_devallowsoft) {
346 if (crid & CRYPTOCAP_F_SOFTWARE) {
347 if (crid & CRYPTOCAP_F_HARDWARE) {
348 *cridp = CRYPTOCAP_F_HARDWARE;
353 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
354 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
366 struct ucred *active_cred,
369 #define SES2(p) ((struct session2_op *)p)
370 struct cryptoini cria, crie;
371 struct fcrypt *fcr = fp->f_data;
372 struct csession *cse;
373 struct session_op *sop;
374 struct crypt_op *cop;
375 struct crypt_aead *caead;
376 struct enc_xform *txform = NULL;
377 struct auth_hash *thash = NULL;
378 struct crypt_kop *kop;
382 #ifdef COMPAT_FREEBSD32
383 struct session2_op sopc;
384 struct crypt_op copc;
385 struct crypt_kop kopc;
391 #ifdef COMPAT_FREEBSD32
393 case CIOCGSESSION232:
394 if (cmd == CIOCGSESSION32) {
395 session_op_from_32(data, (struct session_op *)&sopc);
396 sop = (struct session_op *)&sopc;
397 } else if (cmd == CIOCGSESSION232) {
398 session2_op_from_32(data, &sopc);
399 sop = (struct session_op *)&sopc;
402 sop = (struct session_op *)data;
403 switch (sop->cipher) {
407 txform = &enc_xform_des;
409 case CRYPTO_3DES_CBC:
410 txform = &enc_xform_3des;
413 txform = &enc_xform_blf;
415 case CRYPTO_CAST_CBC:
416 txform = &enc_xform_cast5;
418 case CRYPTO_SKIPJACK_CBC:
419 txform = &enc_xform_skipjack;
422 txform = &enc_xform_rijndael128;
425 txform = &enc_xform_aes_xts;
427 case CRYPTO_NULL_CBC:
428 txform = &enc_xform_null;
431 txform = &enc_xform_arc4;
433 case CRYPTO_CAMELLIA_CBC:
434 txform = &enc_xform_camellia;
437 txform = &enc_xform_aes_icm;
439 case CRYPTO_AES_NIST_GCM_16:
440 txform = &enc_xform_aes_nist_gcm;
444 CRYPTDEB("invalid cipher");
445 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
452 case CRYPTO_MD5_HMAC:
453 thash = &auth_hash_hmac_md5;
455 case CRYPTO_SHA1_HMAC:
456 thash = &auth_hash_hmac_sha1;
458 case CRYPTO_SHA2_256_HMAC:
459 thash = &auth_hash_hmac_sha2_256;
461 case CRYPTO_SHA2_384_HMAC:
462 thash = &auth_hash_hmac_sha2_384;
464 case CRYPTO_SHA2_512_HMAC:
465 thash = &auth_hash_hmac_sha2_512;
467 case CRYPTO_RIPEMD160_HMAC:
468 thash = &auth_hash_hmac_ripemd_160;
470 case CRYPTO_AES_128_NIST_GMAC:
471 thash = &auth_hash_nist_gmac_aes_128;
473 case CRYPTO_AES_192_NIST_GMAC:
474 thash = &auth_hash_nist_gmac_aes_192;
476 case CRYPTO_AES_256_NIST_GMAC:
477 thash = &auth_hash_nist_gmac_aes_256;
482 thash = &auth_hash_md5;
485 thash = &auth_hash_sha1;
488 case CRYPTO_NULL_HMAC:
489 thash = &auth_hash_null;
492 CRYPTDEB("invalid mac");
493 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
497 bzero(&crie, sizeof(crie));
498 bzero(&cria, sizeof(cria));
501 crie.cri_alg = txform->type;
502 crie.cri_klen = sop->keylen * 8;
503 if (sop->keylen > txform->maxkey ||
504 sop->keylen < txform->minkey) {
505 CRYPTDEB("invalid cipher parameters");
507 SDT_PROBE1(opencrypto, dev, ioctl, error,
512 crie.cri_key = malloc(crie.cri_klen / 8,
514 if ((error = copyin(sop->key, crie.cri_key,
515 crie.cri_klen / 8))) {
516 CRYPTDEB("invalid key");
517 SDT_PROBE1(opencrypto, dev, ioctl, error,
522 crie.cri_next = &cria;
526 cria.cri_alg = thash->type;
527 cria.cri_klen = sop->mackeylen * 8;
528 if (thash->keysize != 0 &&
529 sop->mackeylen > thash->keysize) {
530 CRYPTDEB("invalid mac key length");
532 SDT_PROBE1(opencrypto, dev, ioctl, error,
538 cria.cri_key = malloc(cria.cri_klen / 8,
540 if ((error = copyin(sop->mackey, cria.cri_key,
541 cria.cri_klen / 8))) {
542 CRYPTDEB("invalid mac key");
543 SDT_PROBE1(opencrypto, dev, ioctl,
550 /* NB: CIOCGSESSION2 has the crid */
551 if (cmd == CIOCGSESSION2
552 #ifdef COMPAT_FREEBSD32
553 || cmd == CIOCGSESSION232
556 crid = SES2(sop)->crid;
557 error = checkforsoftware(&crid);
559 CRYPTDEB("checkforsoftware");
560 SDT_PROBE1(opencrypto, dev, ioctl, error,
565 crid = CRYPTOCAP_F_HARDWARE;
566 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
568 CRYPTDEB("crypto_newsession");
569 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
573 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
574 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
578 crypto_freesession(sid);
580 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
581 CRYPTDEB("csecreate");
585 if (cmd == CIOCGSESSION2
586 #ifdef COMPAT_FREEBSD32
587 || cmd == CIOCGSESSION232
590 /* return hardware/driver id */
591 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
596 free(crie.cri_key, M_XDATA);
598 free(cria.cri_key, M_XDATA);
600 #ifdef COMPAT_FREEBSD32
602 if (cmd == CIOCGSESSION32)
603 session_op_to_32(sop, data);
604 else if (cmd == CIOCGSESSION232)
605 session2_op_to_32((struct session2_op *)sop,
611 ses = *(u_int32_t *)data;
612 cse = csefind(fcr, ses);
614 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
618 error = csefree(cse);
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);
635 #ifdef COMPAT_FREEBSD32
636 if (error == 0 && cmd == CIOCCRYPT32)
637 crypt_op_to_32(cop, data);
642 #ifdef COMPAT_FREEBSD32
646 if (!crypto_userasymcrypto) {
647 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
648 return (EPERM); /* XXX compat? */
650 #ifdef COMPAT_FREEBSD32
651 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
653 crypt_kop_from_32(data, kop);
656 kop = (struct crypt_kop *)data;
658 #ifdef COMPAT_FREEBSD32
662 /* NB: crypto core enforces s/w driver use */
664 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
667 error = cryptodev_key(kop);
669 #ifdef COMPAT_FREEBSD32
670 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
671 crypt_kop_to_32(kop, data);
675 if (!crypto_userasymcrypto) {
677 * NB: if user asym crypto operations are
678 * not permitted return "no algorithms"
679 * so well-behaved applications will just
680 * fallback to doing them in software.
684 error = crypto_getfeat((int *)data);
686 SDT_PROBE1(opencrypto, dev, ioctl, error,
691 error = cryptodev_find((struct crypt_find_op *)data);
694 caead = (struct crypt_aead *)data;
695 cse = csefind(fcr, caead->ses);
697 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
700 error = cryptodev_aead(cse, caead, active_cred, td);
704 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
711 static int cryptodev_cb(void *);
716 struct csession *cse,
717 struct crypt_op *cop,
718 struct ucred *active_cred,
721 struct cryptop *crp = NULL;
722 struct cryptodesc *crde = NULL, *crda = NULL;
725 if (cop->len > 256*1024-4) {
726 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
731 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
732 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
737 cse->uio.uio_iov = &cse->iovec;
738 cse->uio.uio_iovcnt = 1;
739 cse->uio.uio_offset = 0;
740 cse->uio.uio_resid = cop->len;
741 cse->uio.uio_segflg = UIO_SYSSPACE;
742 cse->uio.uio_rw = UIO_WRITE;
743 cse->uio.uio_td = td;
744 cse->uio.uio_iov[0].iov_len = cop->len;
746 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
747 cse->uio.uio_resid += cse->thash->hashsize;
749 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len,
752 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
754 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
759 if (cse->thash && cse->txform) {
760 if (cop->flags & COP_F_CIPHER_FIRST) {
761 crde = crp->crp_desc;
762 crda = crde->crd_next;
764 crda = crp->crp_desc;
765 crde = crda->crd_next;
767 } else if (cse->thash) {
768 crda = crp->crp_desc;
769 } else if (cse->txform) {
770 crde = crp->crp_desc;
772 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
777 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base,
779 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
785 crda->crd_len = cop->len;
786 crda->crd_inject = cop->len;
788 crda->crd_alg = cse->mac;
789 crda->crd_key = cse->mackey;
790 crda->crd_klen = cse->mackeylen * 8;
794 if (cop->op == COP_ENCRYPT)
795 crde->crd_flags |= CRD_F_ENCRYPT;
797 crde->crd_flags &= ~CRD_F_ENCRYPT;
798 crde->crd_len = cop->len;
799 crde->crd_inject = 0;
801 crde->crd_alg = cse->cipher;
802 crde->crd_key = cse->key;
803 crde->crd_klen = cse->keylen * 8;
806 crp->crp_ilen = cop->len;
807 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
808 | (cop->flags & COP_F_BATCH);
809 crp->crp_buf = (caddr_t)&cse->uio;
810 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
811 crp->crp_sid = cse->sid;
812 crp->crp_opaque = (void *)cse;
816 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
820 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
821 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
825 if ((error = copyin(cop->iv, crde->crd_iv,
826 cse->txform->blocksize))) {
827 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
830 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
832 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
835 crde->crd_flags |= CRD_F_IV_PRESENT;
836 crde->crd_skip = cse->txform->blocksize;
837 crde->crd_len -= cse->txform->blocksize;
840 if (cop->mac && crda == NULL) {
841 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
848 * Let the dispatch run unlocked, then, interlock against the
849 * callback before checking if the operation completed and going
850 * to sleep. This insures drivers don't inherit our lock which
851 * results in a lock order reversal between crypto_dispatch forced
852 * entry and the crypto_done callback into us.
854 error = crypto_dispatch(crp);
855 mtx_lock(&cse->lock);
856 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
857 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
858 mtx_unlock(&cse->lock);
861 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
865 if (crp->crp_etype == EAGAIN) {
867 crp->crp_flags &= ~CRYPTO_F_DONE;
871 if (crp->crp_etype != 0) {
872 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
873 error = crp->crp_etype;
878 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
884 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst,
886 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
891 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
892 cop->mac, cse->thash->hashsize))) {
893 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
900 if (cse->uio.uio_iov[0].iov_base)
901 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
908 struct csession *cse,
909 struct crypt_aead *caead,
910 struct ucred *active_cred,
914 struct cryptop *crp = NULL;
915 struct cryptodesc *crde = NULL, *crda = NULL;
918 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
919 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
923 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
924 (caead->len % cse->txform->blocksize) != 0) {
925 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
930 uio->uio_iov = &cse->iovec;
933 uio->uio_resid = caead->aadlen + caead->len + cse->thash->hashsize;
934 uio->uio_segflg = UIO_SYSSPACE;
935 uio->uio_rw = UIO_WRITE;
937 uio->uio_iov[0].iov_len = uio->uio_resid;
939 uio->uio_iov[0].iov_base = malloc(uio->uio_iov[0].iov_len,
942 crp = crypto_getreq(2);
945 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
949 if (caead->flags & COP_F_CIPHER_FIRST) {
950 crde = crp->crp_desc;
951 crda = crde->crd_next;
953 crda = crp->crp_desc;
954 crde = crda->crd_next;
957 if ((error = copyin(caead->aad, cse->uio.uio_iov[0].iov_base,
959 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
963 if ((error = copyin(caead->src, (char *)cse->uio.uio_iov[0].iov_base +
964 caead->aadlen, caead->len))) {
965 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
970 * For GCM, crd_len covers only the AAD. For other ciphers
971 * chained with an HMAC, crd_len covers both the AAD and the
975 if (cse->cipher == CRYPTO_AES_NIST_GCM_16)
976 crda->crd_len = caead->aadlen;
978 crda->crd_len = caead->aadlen + caead->len;
979 crda->crd_inject = caead->aadlen + caead->len;
981 crda->crd_alg = cse->mac;
982 crda->crd_key = cse->mackey;
983 crda->crd_klen = cse->mackeylen * 8;
985 if (caead->op == COP_ENCRYPT)
986 crde->crd_flags |= CRD_F_ENCRYPT;
988 crde->crd_flags &= ~CRD_F_ENCRYPT;
989 crde->crd_skip = caead->aadlen;
990 crde->crd_len = caead->len;
991 crde->crd_inject = caead->aadlen;
993 crde->crd_alg = cse->cipher;
994 crde->crd_key = cse->key;
995 crde->crd_klen = cse->keylen * 8;
997 crp->crp_ilen = caead->aadlen + caead->len;
998 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
999 | (caead->flags & COP_F_BATCH);
1000 crp->crp_buf = (caddr_t)&cse->uio.uio_iov;
1001 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
1002 crp->crp_sid = cse->sid;
1003 crp->crp_opaque = (void *)cse;
1006 if (caead->ivlen > sizeof(crde->crd_iv)) {
1008 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1012 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1013 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1016 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1018 crde->crd_flags |= CRD_F_IV_PRESENT;
1019 crde->crd_skip += cse->txform->blocksize;
1020 crde->crd_len -= cse->txform->blocksize;
1023 if ((error = copyin(caead->tag, (caddr_t)cse->uio.uio_iov[0].iov_base +
1024 caead->len + caead->aadlen, cse->thash->hashsize))) {
1025 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1030 * Let the dispatch run unlocked, then, interlock against the
1031 * callback before checking if the operation completed and going
1032 * to sleep. This insures drivers don't inherit our lock which
1033 * results in a lock order reversal between crypto_dispatch forced
1034 * entry and the crypto_done callback into us.
1036 error = crypto_dispatch(crp);
1037 mtx_lock(&cse->lock);
1038 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
1039 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
1040 mtx_unlock(&cse->lock);
1043 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1047 if (crp->crp_etype == EAGAIN) {
1049 crp->crp_flags &= ~CRYPTO_F_DONE;
1053 if (crp->crp_etype != 0) {
1054 error = crp->crp_etype;
1055 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1061 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1065 if (caead->dst && (error = copyout(
1066 (caddr_t)cse->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1068 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1072 if ((error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base +
1073 caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1074 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1079 crypto_freereq(crp);
1080 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
1086 cryptodev_cb(void *op)
1088 struct cryptop *crp = (struct cryptop *) op;
1089 struct csession *cse = (struct csession *)crp->crp_opaque;
1091 mtx_lock(&cse->lock);
1092 cse->error = crp->crp_etype;
1094 mtx_unlock(&cse->lock);
1099 cryptodevkey_cb(void *op)
1101 struct cryptkop *krp = (struct cryptkop *) op;
1108 cryptodev_key(struct crypt_kop *kop)
1110 struct cryptkop *krp = NULL;
1112 int in, out, size, i;
1114 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1115 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1119 in = kop->crk_iparams;
1120 out = kop->crk_oparams;
1121 switch (kop->crk_op) {
1123 if (in == 3 && out == 1)
1125 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1127 case CRK_MOD_EXP_CRT:
1128 if (in == 6 && out == 1)
1130 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1133 if (in == 5 && out == 2)
1135 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1137 case CRK_DSA_VERIFY:
1138 if (in == 7 && out == 0)
1140 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1142 case CRK_DH_COMPUTE_KEY:
1143 if (in == 3 && out == 1)
1145 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1148 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1152 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1154 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1157 krp->krp_op = kop->crk_op;
1158 krp->krp_status = kop->crk_status;
1159 krp->krp_iparams = kop->crk_iparams;
1160 krp->krp_oparams = kop->crk_oparams;
1161 krp->krp_crid = kop->crk_crid;
1162 krp->krp_status = 0;
1163 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1165 for (i = 0; i < CRK_MAXPARAM; i++) {
1166 if (kop->crk_param[i].crp_nbits > 65536) {
1167 /* Limit is the same as in OpenBSD */
1168 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1171 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1173 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1174 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1177 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1178 if (i >= krp->krp_iparams)
1180 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1182 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1187 error = crypto_kdispatch(krp);
1189 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1192 error = tsleep(krp, PSOCK, "crydev", 0);
1194 /* XXX can this happen? if so, how do we recover? */
1195 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1199 kop->crk_crid = krp->krp_crid; /* device that did the work */
1200 if (krp->krp_status != 0) {
1201 error = krp->krp_status;
1202 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1206 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1207 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1210 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1212 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1219 kop->crk_status = krp->krp_status;
1220 for (i = 0; i < CRK_MAXPARAM; i++) {
1221 if (krp->krp_param[i].crp_p)
1222 free(krp->krp_param[i].crp_p, M_XDATA);
1230 cryptodev_find(struct crypt_find_op *find)
1233 size_t fnlen = sizeof find->name;
1235 if (find->crid != -1) {
1236 dev = crypto_find_device_byhid(find->crid);
1239 strncpy(find->name, device_get_nameunit(dev), fnlen);
1240 find->name[fnlen - 1] = '\x0';
1242 find->name[fnlen - 1] = '\x0';
1243 find->crid = crypto_find_driver(find->name);
1244 if (find->crid == -1)
1255 struct ucred *active_cred,
1259 return (EOPNOTSUPP);
1264 cryptof_close(struct file *fp, struct thread *td)
1266 struct fcrypt *fcr = fp->f_data;
1267 struct csession *cse;
1269 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1270 TAILQ_REMOVE(&fcr->csessions, cse, next);
1279 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1282 kif->kf_type = KF_TYPE_CRYPTO;
1286 static struct csession *
1287 csefind(struct fcrypt *fcr, u_int ses)
1289 struct csession *cse;
1291 TAILQ_FOREACH(cse, &fcr->csessions, next)
1292 if (cse->ses == ses)
1298 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1300 struct csession *cse;
1302 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1303 if (cse == cse_del) {
1304 TAILQ_REMOVE(&fcr->csessions, cse, next);
1311 static struct csession *
1312 cseadd(struct fcrypt *fcr, struct csession *cse)
1314 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1315 cse->ses = fcr->sesn++;
1320 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
1321 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1322 struct enc_xform *txform, struct auth_hash *thash)
1324 struct csession *cse;
1326 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1329 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1331 cse->keylen = keylen/8;
1332 cse->mackey = mackey;
1333 cse->mackeylen = mackeylen/8;
1335 cse->cipher = cipher;
1337 cse->txform = txform;
1344 csefree(struct csession *cse)
1348 error = crypto_freesession(cse->sid);
1349 mtx_destroy(&cse->lock);
1351 free(cse->key, M_XDATA);
1353 free(cse->mackey, M_XDATA);
1359 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1365 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1371 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1377 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1385 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1386 TAILQ_INIT(&fcr->csessions);
1389 error = falloc(td, &f, &fd, 0);
1395 /* falloc automatically provides an extra reference to 'f'. */
1396 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1397 *(u_int32_t *)data = fd;
1401 error = cryptodev_find((struct crypt_find_op *)data);
1404 error = crypto_getfeat((int *)data);
1413 static struct cdevsw crypto_cdevsw = {
1414 .d_version = D_VERSION,
1415 .d_flags = D_NEEDGIANT,
1416 .d_open = cryptoopen,
1417 .d_read = cryptoread,
1418 .d_write = cryptowrite,
1419 .d_ioctl = cryptoioctl,
1422 static struct cdev *crypto_dev;
1425 * Initialization code, both for static and dynamic loading.
1428 cryptodev_modevent(module_t mod, int type, void *unused)
1433 printf("crypto: <crypto device>\n");
1434 crypto_dev = make_dev(&crypto_cdevsw, 0,
1435 UID_ROOT, GID_WHEEL, 0666,
1439 /*XXX disallow if active sessions */
1440 destroy_dev(crypto_dev);
1446 static moduledata_t cryptodev_mod = {
1451 MODULE_VERSION(cryptodev, 1);
1452 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1453 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1454 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);