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;
281 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
292 TAILQ_HEAD(csessionlist, csession) csessions;
296 static int cryptof_ioctl(struct file *, u_long, void *,
297 struct ucred *, struct thread *);
298 static int cryptof_stat(struct file *, struct stat *,
299 struct ucred *, struct thread *);
300 static int cryptof_close(struct file *, struct thread *);
301 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
304 static struct fileops cryptofops = {
305 .fo_read = invfo_rdwr,
306 .fo_write = invfo_rdwr,
307 .fo_truncate = invfo_truncate,
308 .fo_ioctl = cryptof_ioctl,
309 .fo_poll = invfo_poll,
310 .fo_kqfilter = invfo_kqfilter,
311 .fo_stat = cryptof_stat,
312 .fo_close = cryptof_close,
313 .fo_chmod = invfo_chmod,
314 .fo_chown = invfo_chown,
315 .fo_sendfile = invfo_sendfile,
316 .fo_fill_kinfo = cryptof_fill_kinfo,
319 static struct csession *csefind(struct fcrypt *, u_int);
320 static int csedelete(struct fcrypt *, struct csession *);
321 static struct csession *cseadd(struct fcrypt *, struct csession *);
322 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
323 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
325 static int csefree(struct csession *);
327 static int cryptodev_op(struct csession *, struct crypt_op *,
328 struct ucred *, struct thread *td);
329 static int cryptodev_aead(struct csession *, struct crypt_aead *,
330 struct ucred *, struct thread *);
331 static int cryptodev_key(struct crypt_kop *);
332 static int cryptodev_find(struct crypt_find_op *);
335 * Check a crypto identifier to see if it requested
336 * a software device/driver. This can be done either
337 * by device name/class or through search constraints.
340 checkforsoftware(int *cridp)
346 if (!crypto_devallowsoft) {
347 if (crid & CRYPTOCAP_F_SOFTWARE) {
348 if (crid & CRYPTOCAP_F_HARDWARE) {
349 *cridp = CRYPTOCAP_F_HARDWARE;
354 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
355 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
367 struct ucred *active_cred,
370 #define SES2(p) ((struct session2_op *)p)
371 struct cryptoini cria, crie;
372 struct fcrypt *fcr = fp->f_data;
373 struct csession *cse;
374 struct session_op *sop;
375 struct crypt_op *cop;
376 struct crypt_aead *caead;
377 struct enc_xform *txform = NULL;
378 struct auth_hash *thash = NULL;
379 struct crypt_kop *kop;
383 #ifdef COMPAT_FREEBSD32
384 struct session2_op sopc;
385 struct crypt_op copc;
386 struct crypt_kop kopc;
392 #ifdef COMPAT_FREEBSD32
394 case CIOCGSESSION232:
395 if (cmd == CIOCGSESSION32) {
396 session_op_from_32(data, (struct session_op *)&sopc);
397 sop = (struct session_op *)&sopc;
398 } else if (cmd == CIOCGSESSION232) {
399 session2_op_from_32(data, &sopc);
400 sop = (struct session_op *)&sopc;
403 sop = (struct session_op *)data;
404 switch (sop->cipher) {
408 txform = &enc_xform_des;
410 case CRYPTO_3DES_CBC:
411 txform = &enc_xform_3des;
414 txform = &enc_xform_blf;
416 case CRYPTO_CAST_CBC:
417 txform = &enc_xform_cast5;
419 case CRYPTO_SKIPJACK_CBC:
420 txform = &enc_xform_skipjack;
423 txform = &enc_xform_rijndael128;
426 txform = &enc_xform_aes_xts;
428 case CRYPTO_NULL_CBC:
429 txform = &enc_xform_null;
432 txform = &enc_xform_arc4;
434 case CRYPTO_CAMELLIA_CBC:
435 txform = &enc_xform_camellia;
438 txform = &enc_xform_aes_icm;
440 case CRYPTO_AES_NIST_GCM_16:
441 txform = &enc_xform_aes_nist_gcm;
445 CRYPTDEB("invalid cipher");
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");
496 bzero(&crie, sizeof(crie));
497 bzero(&cria, sizeof(cria));
500 crie.cri_alg = txform->type;
501 crie.cri_klen = sop->keylen * 8;
502 if (sop->keylen > txform->maxkey ||
503 sop->keylen < txform->minkey) {
504 CRYPTDEB("invalid cipher parameters");
509 crie.cri_key = malloc(crie.cri_klen / 8,
511 if ((error = copyin(sop->key, crie.cri_key,
512 crie.cri_klen / 8))) {
513 CRYPTDEB("invalid key");
517 crie.cri_next = &cria;
521 cria.cri_alg = thash->type;
522 cria.cri_klen = sop->mackeylen * 8;
523 if (sop->mackeylen != thash->keysize) {
524 CRYPTDEB("invalid mac key length");
530 cria.cri_key = malloc(cria.cri_klen / 8,
532 if ((error = copyin(sop->mackey, cria.cri_key,
533 cria.cri_klen / 8))) {
534 CRYPTDEB("invalid mac key");
540 /* NB: CIOCGSESSION2 has the crid */
541 if (cmd == CIOCGSESSION2
542 #ifdef COMPAT_FREEBSD32
543 || cmd == CIOCGSESSION232
546 crid = SES2(sop)->crid;
547 error = checkforsoftware(&crid);
549 CRYPTDEB("checkforsoftware");
553 crid = CRYPTOCAP_F_HARDWARE;
554 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
556 CRYPTDEB("crypto_newsession");
560 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
561 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
565 crypto_freesession(sid);
567 CRYPTDEB("csecreate");
571 if (cmd == CIOCGSESSION2
572 #ifdef COMPAT_FREEBSD32
573 || cmd == CIOCGSESSION232
576 /* return hardware/driver id */
577 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
582 free(crie.cri_key, M_XDATA);
584 free(cria.cri_key, M_XDATA);
586 #ifdef COMPAT_FREEBSD32
588 if (cmd == CIOCGSESSION32)
589 session_op_to_32(sop, data);
590 else if (cmd == CIOCGSESSION232)
591 session2_op_to_32((struct session2_op *)sop,
597 ses = *(u_int32_t *)data;
598 cse = csefind(fcr, ses);
602 error = csefree(cse);
605 #ifdef COMPAT_FREEBSD32
607 if (cmd == CIOCCRYPT32) {
609 crypt_op_from_32(data, cop);
612 cop = (struct crypt_op *)data;
613 cse = csefind(fcr, cop->ses);
615 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
618 error = cryptodev_op(cse, cop, active_cred, td);
619 #ifdef COMPAT_FREEBSD32
620 if (error == 0 && cmd == CIOCCRYPT32)
621 crypt_op_to_32(cop, data);
626 #ifdef COMPAT_FREEBSD32
630 if (!crypto_userasymcrypto)
631 return (EPERM); /* XXX compat? */
632 #ifdef COMPAT_FREEBSD32
633 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
635 crypt_kop_from_32(data, kop);
638 kop = (struct crypt_kop *)data;
640 #ifdef COMPAT_FREEBSD32
644 /* NB: crypto core enforces s/w driver use */
646 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
649 error = cryptodev_key(kop);
651 #ifdef COMPAT_FREEBSD32
652 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
653 crypt_kop_to_32(kop, data);
657 if (!crypto_userasymcrypto) {
659 * NB: if user asym crypto operations are
660 * not permitted return "no algorithms"
661 * so well-behaved applications will just
662 * fallback to doing them in software.
666 error = crypto_getfeat((int *)data);
669 error = cryptodev_find((struct crypt_find_op *)data);
672 caead = (struct crypt_aead *)data;
673 cse = csefind(fcr, caead->ses);
676 error = cryptodev_aead(cse, caead, active_cred, td);
686 static int cryptodev_cb(void *);
691 struct csession *cse,
692 struct crypt_op *cop,
693 struct ucred *active_cred,
696 struct cryptop *crp = NULL;
697 struct cryptodesc *crde = NULL, *crda = NULL;
700 if (cop->len > 256*1024-4) {
701 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
706 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
707 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
712 cse->uio.uio_iov = &cse->iovec;
713 cse->uio.uio_iovcnt = 1;
714 cse->uio.uio_offset = 0;
715 cse->uio.uio_resid = cop->len;
716 cse->uio.uio_segflg = UIO_SYSSPACE;
717 cse->uio.uio_rw = UIO_WRITE;
718 cse->uio.uio_td = td;
719 cse->uio.uio_iov[0].iov_len = cop->len;
721 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
722 cse->uio.uio_resid += cse->thash->hashsize;
724 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len,
727 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
729 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
735 crda = crp->crp_desc;
737 crde = crda->crd_next;
740 crde = crp->crp_desc;
742 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
748 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base,
750 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
756 crda->crd_len = cop->len;
757 crda->crd_inject = cop->len;
759 crda->crd_alg = cse->mac;
760 crda->crd_key = cse->mackey;
761 crda->crd_klen = cse->mackeylen * 8;
765 if (cop->op == COP_ENCRYPT)
766 crde->crd_flags |= CRD_F_ENCRYPT;
768 crde->crd_flags &= ~CRD_F_ENCRYPT;
769 crde->crd_len = cop->len;
770 crde->crd_inject = 0;
772 crde->crd_alg = cse->cipher;
773 crde->crd_key = cse->key;
774 crde->crd_klen = cse->keylen * 8;
777 crp->crp_ilen = cop->len;
778 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
779 | (cop->flags & COP_F_BATCH);
780 crp->crp_buf = (caddr_t)&cse->uio;
781 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
782 crp->crp_sid = cse->sid;
783 crp->crp_opaque = (void *)cse;
787 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
791 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
792 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
796 if ((error = copyin(cop->iv, cse->tmp_iv,
797 cse->txform->blocksize))) {
798 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
801 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
802 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
804 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
807 crde->crd_flags |= CRD_F_IV_PRESENT;
808 crde->crd_skip = cse->txform->blocksize;
809 crde->crd_len -= cse->txform->blocksize;
812 if (cop->mac && crda == NULL) {
813 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
820 * Let the dispatch run unlocked, then, interlock against the
821 * callback before checking if the operation completed and going
822 * to sleep. This insures drivers don't inherit our lock which
823 * results in a lock order reversal between crypto_dispatch forced
824 * entry and the crypto_done callback into us.
826 error = crypto_dispatch(crp);
827 mtx_lock(&cse->lock);
828 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
829 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
830 mtx_unlock(&cse->lock);
833 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
837 if (crp->crp_etype == EAGAIN) {
839 crp->crp_flags &= ~CRYPTO_F_DONE;
843 if (crp->crp_etype != 0) {
844 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
845 error = crp->crp_etype;
850 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
856 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst,
858 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
863 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
864 cop->mac, cse->thash->hashsize))) {
865 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
872 if (cse->uio.uio_iov[0].iov_base)
873 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
880 struct csession *cse,
881 struct crypt_aead *caead,
882 struct ucred *active_cred,
886 struct cryptop *crp = NULL;
887 struct cryptodesc *crde = NULL, *crda = NULL;
890 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4)
893 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
894 (caead->len % cse->txform->blocksize) != 0)
898 uio->uio_iov = &cse->iovec;
901 uio->uio_resid = caead->len + caead->aadlen + cse->thash->hashsize;
902 uio->uio_segflg = UIO_SYSSPACE;
903 uio->uio_rw = UIO_WRITE;
905 uio->uio_iov[0].iov_len = uio->uio_resid;
907 uio->uio_iov[0].iov_base = malloc(uio->uio_iov[0].iov_len,
910 crp = crypto_getreq(2);
916 crda = crp->crp_desc;
917 crde = crda->crd_next;
919 if ((error = copyin(caead->src, cse->uio.uio_iov[0].iov_base,
923 if ((error = copyin(caead->aad, (char *)cse->uio.uio_iov[0].iov_base +
924 caead->len, caead->aadlen)))
927 crda->crd_skip = caead->len;
928 crda->crd_len = caead->aadlen;
929 crda->crd_inject = caead->len + caead->aadlen;
931 crda->crd_alg = cse->mac;
932 crda->crd_key = cse->mackey;
933 crda->crd_klen = cse->mackeylen * 8;
935 if (caead->op == COP_ENCRYPT)
936 crde->crd_flags |= CRD_F_ENCRYPT;
938 crde->crd_flags &= ~CRD_F_ENCRYPT;
939 /* crde->crd_skip set below */
940 crde->crd_len = caead->len;
941 crde->crd_inject = 0;
943 crde->crd_alg = cse->cipher;
944 crde->crd_key = cse->key;
945 crde->crd_klen = cse->keylen * 8;
947 crp->crp_ilen = caead->len + caead->aadlen;
948 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
949 | (caead->flags & COP_F_BATCH);
950 crp->crp_buf = (caddr_t)&cse->uio.uio_iov;
951 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
952 crp->crp_sid = cse->sid;
953 crp->crp_opaque = (void *)cse;
956 if (caead->ivlen > sizeof cse->tmp_iv) {
961 if ((error = copyin(caead->iv, cse->tmp_iv, caead->ivlen)))
963 bcopy(cse->tmp_iv, crde->crd_iv, caead->ivlen);
964 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
967 crde->crd_flags |= CRD_F_IV_PRESENT;
968 crde->crd_skip = cse->txform->blocksize;
969 crde->crd_len -= cse->txform->blocksize;
972 if ((error = copyin(caead->tag, (caddr_t)cse->uio.uio_iov[0].iov_base +
973 caead->len + caead->aadlen, cse->thash->hashsize)))
977 * Let the dispatch run unlocked, then, interlock against the
978 * callback before checking if the operation completed and going
979 * to sleep. This insures drivers don't inherit our lock which
980 * results in a lock order reversal between crypto_dispatch forced
981 * entry and the crypto_done callback into us.
983 error = crypto_dispatch(crp);
984 mtx_lock(&cse->lock);
985 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
986 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
987 mtx_unlock(&cse->lock);
992 if (crp->crp_etype == EAGAIN) {
994 crp->crp_flags &= ~CRYPTO_F_DONE;
998 if (crp->crp_etype != 0) {
999 error = crp->crp_etype;
1008 if (caead->dst && (error = copyout(cse->uio.uio_iov[0].iov_base,
1009 caead->dst, caead->len)))
1012 if ((error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base +
1013 caead->len + caead->aadlen, caead->tag, cse->thash->hashsize)))
1017 crypto_freereq(crp);
1018 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
1024 cryptodev_cb(void *op)
1026 struct cryptop *crp = (struct cryptop *) op;
1027 struct csession *cse = (struct csession *)crp->crp_opaque;
1029 mtx_lock(&cse->lock);
1030 cse->error = crp->crp_etype;
1032 mtx_unlock(&cse->lock);
1037 cryptodevkey_cb(void *op)
1039 struct cryptkop *krp = (struct cryptkop *) op;
1046 cryptodev_key(struct crypt_kop *kop)
1048 struct cryptkop *krp = NULL;
1050 int in, out, size, i;
1052 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1056 in = kop->crk_iparams;
1057 out = kop->crk_oparams;
1058 switch (kop->crk_op) {
1060 if (in == 3 && out == 1)
1063 case CRK_MOD_EXP_CRT:
1064 if (in == 6 && out == 1)
1068 if (in == 5 && out == 2)
1071 case CRK_DSA_VERIFY:
1072 if (in == 7 && out == 0)
1075 case CRK_DH_COMPUTE_KEY:
1076 if (in == 3 && out == 1)
1083 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1086 krp->krp_op = kop->crk_op;
1087 krp->krp_status = kop->crk_status;
1088 krp->krp_iparams = kop->crk_iparams;
1089 krp->krp_oparams = kop->crk_oparams;
1090 krp->krp_crid = kop->crk_crid;
1091 krp->krp_status = 0;
1092 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1094 for (i = 0; i < CRK_MAXPARAM; i++) {
1095 if (kop->crk_param[i].crp_nbits > 65536)
1096 /* Limit is the same as in OpenBSD */
1098 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1100 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1101 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1104 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1105 if (i >= krp->krp_iparams)
1107 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1112 error = crypto_kdispatch(krp);
1115 error = tsleep(krp, PSOCK, "crydev", 0);
1117 /* XXX can this happen? if so, how do we recover? */
1121 kop->crk_crid = krp->krp_crid; /* device that did the work */
1122 if (krp->krp_status != 0) {
1123 error = krp->krp_status;
1127 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1128 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1131 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1138 kop->crk_status = krp->krp_status;
1139 for (i = 0; i < CRK_MAXPARAM; i++) {
1140 if (krp->krp_param[i].crp_p)
1141 free(krp->krp_param[i].crp_p, M_XDATA);
1149 cryptodev_find(struct crypt_find_op *find)
1152 size_t fnlen = sizeof find->name;
1154 if (find->crid != -1) {
1155 dev = crypto_find_device_byhid(find->crid);
1158 strncpy(find->name, device_get_nameunit(dev), fnlen);
1159 find->name[fnlen - 1] = '\x0';
1161 find->name[fnlen - 1] = '\x0';
1162 find->crid = crypto_find_driver(find->name);
1163 if (find->crid == -1)
1174 struct ucred *active_cred,
1178 return (EOPNOTSUPP);
1183 cryptof_close(struct file *fp, struct thread *td)
1185 struct fcrypt *fcr = fp->f_data;
1186 struct csession *cse;
1188 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1189 TAILQ_REMOVE(&fcr->csessions, cse, next);
1198 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1201 kif->kf_type = KF_TYPE_CRYPTO;
1205 static struct csession *
1206 csefind(struct fcrypt *fcr, u_int ses)
1208 struct csession *cse;
1210 TAILQ_FOREACH(cse, &fcr->csessions, next)
1211 if (cse->ses == ses)
1217 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1219 struct csession *cse;
1221 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1222 if (cse == cse_del) {
1223 TAILQ_REMOVE(&fcr->csessions, cse, next);
1230 static struct csession *
1231 cseadd(struct fcrypt *fcr, struct csession *cse)
1233 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1234 cse->ses = fcr->sesn++;
1239 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
1240 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1241 struct enc_xform *txform, struct auth_hash *thash)
1243 struct csession *cse;
1245 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1248 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1250 cse->keylen = keylen/8;
1251 cse->mackey = mackey;
1252 cse->mackeylen = mackeylen/8;
1254 cse->cipher = cipher;
1256 cse->txform = txform;
1263 csefree(struct csession *cse)
1267 error = crypto_freesession(cse->sid);
1268 mtx_destroy(&cse->lock);
1270 free(cse->key, M_XDATA);
1272 free(cse->mackey, M_XDATA);
1278 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1284 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1290 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1296 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1304 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1305 TAILQ_INIT(&fcr->csessions);
1308 error = falloc(td, &f, &fd, 0);
1314 /* falloc automatically provides an extra reference to 'f'. */
1315 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1316 *(u_int32_t *)data = fd;
1320 error = cryptodev_find((struct crypt_find_op *)data);
1323 error = crypto_getfeat((int *)data);
1332 static struct cdevsw crypto_cdevsw = {
1333 .d_version = D_VERSION,
1334 .d_flags = D_NEEDGIANT,
1335 .d_open = cryptoopen,
1336 .d_read = cryptoread,
1337 .d_write = cryptowrite,
1338 .d_ioctl = cryptoioctl,
1341 static struct cdev *crypto_dev;
1344 * Initialization code, both for static and dynamic loading.
1347 cryptodev_modevent(module_t mod, int type, void *unused)
1352 printf("crypto: <crypto device>\n");
1353 crypto_dev = make_dev(&crypto_cdevsw, 0,
1354 UID_ROOT, GID_WHEEL, 0666,
1358 /*XXX disallow if active sessions */
1359 destroy_dev(crypto_dev);
1365 static moduledata_t cryptodev_mod = {
1370 MODULE_VERSION(cryptodev, 1);
1371 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1372 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1373 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);