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"
45 #include "opt_kdtrace.h"
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/malloc.h>
52 #include <sys/mutex.h>
53 #include <sys/sysctl.h>
55 #include <sys/filedesc.h>
56 #include <sys/errno.h>
58 #include <sys/random.h>
60 #include <sys/kernel.h>
61 #include <sys/module.h>
62 #include <sys/fcntl.h>
67 #include <opencrypto/cryptodev.h>
68 #include <opencrypto/xform.h>
70 SDT_PROVIDER_DECLARE(opencrypto);
72 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
74 #ifdef COMPAT_FREEBSD32
75 #include <sys/mount.h>
76 #include <compat/freebsd32/freebsd32.h>
88 struct session2_op32 {
121 struct crparam32 crk_param[CRK_MAXPARAM];
124 struct cryptotstat32 {
125 struct timespec32 acc;
126 struct timespec32 min;
127 struct timespec32 max;
131 struct cryptostats32 {
139 u_int32_t cs_kblocks;
140 struct cryptotstat32 cs_invoke;
141 struct cryptotstat32 cs_done;
142 struct cryptotstat32 cs_cb;
143 struct cryptotstat32 cs_finis;
146 #define CIOCGSESSION32 _IOWR('c', 101, struct session_op32)
147 #define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32)
148 #define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32)
149 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
150 #define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32)
153 session_op_from_32(const struct session_op32 *from, struct session_op *to)
156 CP(*from, *to, cipher);
158 CP(*from, *to, keylen);
159 PTRIN_CP(*from, *to, key);
160 CP(*from, *to, mackeylen);
161 PTRIN_CP(*from, *to, mackey);
166 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
169 session_op_from_32((const struct session_op32 *)from,
170 (struct session_op *)to);
171 CP(*from, *to, crid);
175 session_op_to_32(const struct session_op *from, struct session_op32 *to)
178 CP(*from, *to, cipher);
180 CP(*from, *to, keylen);
181 PTROUT_CP(*from, *to, key);
182 CP(*from, *to, mackeylen);
183 PTROUT_CP(*from, *to, mackey);
188 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
191 session_op_to_32((const struct session_op *)from,
192 (struct session_op32 *)to);
193 CP(*from, *to, crid);
197 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
202 CP(*from, *to, flags);
204 PTRIN_CP(*from, *to, src);
205 PTRIN_CP(*from, *to, dst);
206 PTRIN_CP(*from, *to, mac);
207 PTRIN_CP(*from, *to, iv);
211 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
216 CP(*from, *to, flags);
218 PTROUT_CP(*from, *to, src);
219 PTROUT_CP(*from, *to, dst);
220 PTROUT_CP(*from, *to, mac);
221 PTROUT_CP(*from, *to, iv);
225 crparam_from_32(const struct crparam32 *from, struct crparam *to)
228 PTRIN_CP(*from, *to, crp_p);
229 CP(*from, *to, crp_nbits);
233 crparam_to_32(const struct crparam *from, struct crparam32 *to)
236 PTROUT_CP(*from, *to, crp_p);
237 CP(*from, *to, crp_nbits);
241 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
245 CP(*from, *to, crk_op);
246 CP(*from, *to, crk_status);
247 CP(*from, *to, crk_iparams);
248 CP(*from, *to, crk_oparams);
249 CP(*from, *to, crk_crid);
250 for (i = 0; i < CRK_MAXPARAM; i++)
251 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
255 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
259 CP(*from, *to, crk_op);
260 CP(*from, *to, crk_status);
261 CP(*from, *to, crk_iparams);
262 CP(*from, *to, crk_oparams);
263 CP(*from, *to, crk_crid);
264 for (i = 0; i < CRK_MAXPARAM; i++)
265 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
270 TAILQ_ENTRY(csession) next;
273 struct mtx lock; /* for op submission */
276 struct enc_xform *txform;
278 struct auth_hash *thash;
282 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
293 TAILQ_HEAD(csessionlist, csession) csessions;
297 static int cryptof_ioctl(struct file *, u_long, void *,
298 struct ucred *, struct thread *);
299 static int cryptof_stat(struct file *, struct stat *,
300 struct ucred *, struct thread *);
301 static int cryptof_close(struct file *, struct thread *);
302 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
305 static struct fileops cryptofops = {
306 .fo_read = invfo_rdwr,
307 .fo_write = invfo_rdwr,
308 .fo_truncate = invfo_truncate,
309 .fo_ioctl = cryptof_ioctl,
310 .fo_poll = invfo_poll,
311 .fo_kqfilter = invfo_kqfilter,
312 .fo_stat = cryptof_stat,
313 .fo_close = cryptof_close,
314 .fo_chmod = invfo_chmod,
315 .fo_chown = invfo_chown,
316 .fo_sendfile = invfo_sendfile,
317 .fo_fill_kinfo = cryptof_fill_kinfo,
320 static struct csession *csefind(struct fcrypt *, u_int);
321 static int csedelete(struct fcrypt *, struct csession *);
322 static struct csession *cseadd(struct fcrypt *, struct csession *);
323 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
324 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
326 static int csefree(struct csession *);
328 static int cryptodev_op(struct csession *, struct crypt_op *,
329 struct ucred *, struct thread *td);
330 static int cryptodev_aead(struct csession *, struct crypt_aead *,
331 struct ucred *, struct thread *);
332 static int cryptodev_key(struct crypt_kop *);
333 static int cryptodev_find(struct crypt_find_op *);
336 * Check a crypto identifier to see if it requested
337 * a software device/driver. This can be done either
338 * by device name/class or through search constraints.
341 checkforsoftware(int *cridp)
347 if (!crypto_devallowsoft) {
348 if (crid & CRYPTOCAP_F_SOFTWARE) {
349 if (crid & CRYPTOCAP_F_HARDWARE) {
350 *cridp = CRYPTOCAP_F_HARDWARE;
355 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
356 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
368 struct ucred *active_cred,
371 #define SES2(p) ((struct session2_op *)p)
372 struct cryptoini cria, crie;
373 struct fcrypt *fcr = fp->f_data;
374 struct csession *cse;
375 struct session_op *sop;
376 struct crypt_op *cop;
377 struct crypt_aead *caead;
378 struct enc_xform *txform = NULL;
379 struct auth_hash *thash = NULL;
380 struct crypt_kop *kop;
384 #ifdef COMPAT_FREEBSD32
385 struct session2_op sopc;
386 struct crypt_op copc;
387 struct crypt_kop kopc;
393 #ifdef COMPAT_FREEBSD32
395 case CIOCGSESSION232:
396 if (cmd == CIOCGSESSION32) {
397 session_op_from_32(data, (struct session_op *)&sopc);
398 sop = (struct session_op *)&sopc;
399 } else if (cmd == CIOCGSESSION232) {
400 session2_op_from_32(data, &sopc);
401 sop = (struct session_op *)&sopc;
404 sop = (struct session_op *)data;
405 switch (sop->cipher) {
409 txform = &enc_xform_des;
411 case CRYPTO_3DES_CBC:
412 txform = &enc_xform_3des;
415 txform = &enc_xform_blf;
417 case CRYPTO_CAST_CBC:
418 txform = &enc_xform_cast5;
420 case CRYPTO_SKIPJACK_CBC:
421 txform = &enc_xform_skipjack;
424 txform = &enc_xform_rijndael128;
427 txform = &enc_xform_aes_xts;
429 case CRYPTO_NULL_CBC:
430 txform = &enc_xform_null;
433 txform = &enc_xform_arc4;
435 case CRYPTO_CAMELLIA_CBC:
436 txform = &enc_xform_camellia;
439 txform = &enc_xform_aes_icm;
441 case CRYPTO_AES_NIST_GCM_16:
442 txform = &enc_xform_aes_nist_gcm;
446 CRYPTDEB("invalid cipher");
453 case CRYPTO_MD5_HMAC:
454 thash = &auth_hash_hmac_md5;
456 case CRYPTO_SHA1_HMAC:
457 thash = &auth_hash_hmac_sha1;
459 case CRYPTO_SHA2_256_HMAC:
460 thash = &auth_hash_hmac_sha2_256;
462 case CRYPTO_SHA2_384_HMAC:
463 thash = &auth_hash_hmac_sha2_384;
465 case CRYPTO_SHA2_512_HMAC:
466 thash = &auth_hash_hmac_sha2_512;
468 case CRYPTO_RIPEMD160_HMAC:
469 thash = &auth_hash_hmac_ripemd_160;
471 case CRYPTO_AES_128_NIST_GMAC:
472 thash = &auth_hash_nist_gmac_aes_128;
474 case CRYPTO_AES_192_NIST_GMAC:
475 thash = &auth_hash_nist_gmac_aes_192;
477 case CRYPTO_AES_256_NIST_GMAC:
478 thash = &auth_hash_nist_gmac_aes_256;
483 thash = &auth_hash_md5;
486 thash = &auth_hash_sha1;
489 case CRYPTO_NULL_HMAC:
490 thash = &auth_hash_null;
493 CRYPTDEB("invalid mac");
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");
510 crie.cri_key = malloc(crie.cri_klen / 8,
512 if ((error = copyin(sop->key, crie.cri_key,
513 crie.cri_klen / 8))) {
514 CRYPTDEB("invalid key");
518 crie.cri_next = &cria;
522 cria.cri_alg = thash->type;
523 cria.cri_klen = sop->mackeylen * 8;
524 if (sop->mackeylen != thash->keysize) {
525 CRYPTDEB("invalid mac key length");
531 cria.cri_key = malloc(cria.cri_klen / 8,
533 if ((error = copyin(sop->mackey, cria.cri_key,
534 cria.cri_klen / 8))) {
535 CRYPTDEB("invalid mac key");
541 /* NB: CIOCGSESSION2 has the crid */
542 if (cmd == CIOCGSESSION2
543 #ifdef COMPAT_FREEBSD32
544 || cmd == CIOCGSESSION232
547 crid = SES2(sop)->crid;
548 error = checkforsoftware(&crid);
550 CRYPTDEB("checkforsoftware");
554 crid = CRYPTOCAP_F_HARDWARE;
555 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
557 CRYPTDEB("crypto_newsession");
561 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
562 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
566 crypto_freesession(sid);
568 CRYPTDEB("csecreate");
572 if (cmd == CIOCGSESSION2
573 #ifdef COMPAT_FREEBSD32
574 || cmd == CIOCGSESSION232
577 /* return hardware/driver id */
578 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
583 free(crie.cri_key, M_XDATA);
585 free(cria.cri_key, M_XDATA);
587 #ifdef COMPAT_FREEBSD32
589 if (cmd == CIOCGSESSION32)
590 session_op_to_32(sop, data);
591 else if (cmd == CIOCGSESSION232)
592 session2_op_to_32((struct session2_op *)sop,
598 ses = *(u_int32_t *)data;
599 cse = csefind(fcr, ses);
603 error = csefree(cse);
606 #ifdef COMPAT_FREEBSD32
608 if (cmd == CIOCCRYPT32) {
610 crypt_op_from_32(data, cop);
613 cop = (struct crypt_op *)data;
614 cse = csefind(fcr, cop->ses);
616 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
619 error = cryptodev_op(cse, cop, active_cred, td);
620 #ifdef COMPAT_FREEBSD32
621 if (error == 0 && cmd == CIOCCRYPT32)
622 crypt_op_to_32(cop, data);
627 #ifdef COMPAT_FREEBSD32
631 if (!crypto_userasymcrypto)
632 return (EPERM); /* XXX compat? */
633 #ifdef COMPAT_FREEBSD32
634 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
636 crypt_kop_from_32(data, kop);
639 kop = (struct crypt_kop *)data;
641 #ifdef COMPAT_FREEBSD32
645 /* NB: crypto core enforces s/w driver use */
647 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
650 error = cryptodev_key(kop);
652 #ifdef COMPAT_FREEBSD32
653 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
654 crypt_kop_to_32(kop, data);
658 if (!crypto_userasymcrypto) {
660 * NB: if user asym crypto operations are
661 * not permitted return "no algorithms"
662 * so well-behaved applications will just
663 * fallback to doing them in software.
667 error = crypto_getfeat((int *)data);
670 error = cryptodev_find((struct crypt_find_op *)data);
673 caead = (struct crypt_aead *)data;
674 cse = csefind(fcr, caead->ses);
677 error = cryptodev_aead(cse, caead, active_cred, td);
687 static int cryptodev_cb(void *);
692 struct csession *cse,
693 struct crypt_op *cop,
694 struct ucred *active_cred,
697 struct cryptop *crp = NULL;
698 struct cryptodesc *crde = NULL, *crda = NULL;
701 if (cop->len > 256*1024-4) {
702 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
707 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
708 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
713 cse->uio.uio_iov = &cse->iovec;
714 cse->uio.uio_iovcnt = 1;
715 cse->uio.uio_offset = 0;
716 cse->uio.uio_resid = cop->len;
717 cse->uio.uio_segflg = UIO_SYSSPACE;
718 cse->uio.uio_rw = UIO_WRITE;
719 cse->uio.uio_td = td;
720 cse->uio.uio_iov[0].iov_len = cop->len;
722 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
723 cse->uio.uio_resid += cse->thash->hashsize;
725 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len,
728 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
730 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
736 crda = crp->crp_desc;
738 crde = crda->crd_next;
741 crde = crp->crp_desc;
743 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
749 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base,
751 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
757 crda->crd_len = cop->len;
758 crda->crd_inject = cop->len;
760 crda->crd_alg = cse->mac;
761 crda->crd_key = cse->mackey;
762 crda->crd_klen = cse->mackeylen * 8;
766 if (cop->op == COP_ENCRYPT)
767 crde->crd_flags |= CRD_F_ENCRYPT;
769 crde->crd_flags &= ~CRD_F_ENCRYPT;
770 crde->crd_len = cop->len;
771 crde->crd_inject = 0;
773 crde->crd_alg = cse->cipher;
774 crde->crd_key = cse->key;
775 crde->crd_klen = cse->keylen * 8;
778 crp->crp_ilen = cop->len;
779 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
780 | (cop->flags & COP_F_BATCH);
781 crp->crp_buf = (caddr_t)&cse->uio;
782 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
783 crp->crp_sid = cse->sid;
784 crp->crp_opaque = (void *)cse;
788 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
792 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
793 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
797 if ((error = copyin(cop->iv, cse->tmp_iv,
798 cse->txform->blocksize))) {
799 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
802 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
803 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
805 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
808 crde->crd_flags |= CRD_F_IV_PRESENT;
809 crde->crd_skip = cse->txform->blocksize;
810 crde->crd_len -= cse->txform->blocksize;
813 if (cop->mac && crda == NULL) {
814 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
821 * Let the dispatch run unlocked, then, interlock against the
822 * callback before checking if the operation completed and going
823 * to sleep. This insures drivers don't inherit our lock which
824 * results in a lock order reversal between crypto_dispatch forced
825 * entry and the crypto_done callback into us.
827 error = crypto_dispatch(crp);
828 mtx_lock(&cse->lock);
829 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
830 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
831 mtx_unlock(&cse->lock);
834 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
838 if (crp->crp_etype == EAGAIN) {
840 crp->crp_flags &= ~CRYPTO_F_DONE;
844 if (crp->crp_etype != 0) {
845 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
846 error = crp->crp_etype;
851 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
857 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst,
859 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
864 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
865 cop->mac, cse->thash->hashsize))) {
866 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
873 if (cse->uio.uio_iov[0].iov_base)
874 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
881 struct csession *cse,
882 struct crypt_aead *caead,
883 struct ucred *active_cred,
887 struct cryptop *crp = NULL;
888 struct cryptodesc *crde = NULL, *crda = NULL;
891 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4)
894 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
895 (caead->len % cse->txform->blocksize) != 0)
899 uio->uio_iov = &cse->iovec;
902 uio->uio_resid = caead->len + caead->aadlen + cse->thash->hashsize;
903 uio->uio_segflg = UIO_SYSSPACE;
904 uio->uio_rw = UIO_WRITE;
906 uio->uio_iov[0].iov_len = uio->uio_resid;
908 uio->uio_iov[0].iov_base = malloc(uio->uio_iov[0].iov_len,
911 crp = crypto_getreq(2);
917 crda = crp->crp_desc;
918 crde = crda->crd_next;
920 if ((error = copyin(caead->src, cse->uio.uio_iov[0].iov_base,
924 if ((error = copyin(caead->aad, (char *)cse->uio.uio_iov[0].iov_base +
925 caead->len, caead->aadlen)))
928 crda->crd_skip = caead->len;
929 crda->crd_len = caead->aadlen;
930 crda->crd_inject = caead->len + caead->aadlen;
932 crda->crd_alg = cse->mac;
933 crda->crd_key = cse->mackey;
934 crda->crd_klen = cse->mackeylen * 8;
936 if (caead->op == COP_ENCRYPT)
937 crde->crd_flags |= CRD_F_ENCRYPT;
939 crde->crd_flags &= ~CRD_F_ENCRYPT;
940 /* crde->crd_skip set below */
941 crde->crd_len = caead->len;
942 crde->crd_inject = 0;
944 crde->crd_alg = cse->cipher;
945 crde->crd_key = cse->key;
946 crde->crd_klen = cse->keylen * 8;
948 crp->crp_ilen = caead->len + caead->aadlen;
949 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
950 | (caead->flags & COP_F_BATCH);
951 crp->crp_buf = (caddr_t)&cse->uio.uio_iov;
952 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
953 crp->crp_sid = cse->sid;
954 crp->crp_opaque = (void *)cse;
957 if (caead->ivlen > sizeof cse->tmp_iv) {
962 if ((error = copyin(caead->iv, cse->tmp_iv, caead->ivlen)))
964 bcopy(cse->tmp_iv, crde->crd_iv, caead->ivlen);
965 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
968 crde->crd_flags |= CRD_F_IV_PRESENT;
969 crde->crd_skip = cse->txform->blocksize;
970 crde->crd_len -= cse->txform->blocksize;
973 if ((error = copyin(caead->tag, (caddr_t)cse->uio.uio_iov[0].iov_base +
974 caead->len + caead->aadlen, cse->thash->hashsize)))
978 * Let the dispatch run unlocked, then, interlock against the
979 * callback before checking if the operation completed and going
980 * to sleep. This insures drivers don't inherit our lock which
981 * results in a lock order reversal between crypto_dispatch forced
982 * entry and the crypto_done callback into us.
984 error = crypto_dispatch(crp);
985 mtx_lock(&cse->lock);
986 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
987 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
988 mtx_unlock(&cse->lock);
993 if (crp->crp_etype == EAGAIN) {
995 crp->crp_flags &= ~CRYPTO_F_DONE;
999 if (crp->crp_etype != 0) {
1000 error = crp->crp_etype;
1009 if (caead->dst && (error = copyout(cse->uio.uio_iov[0].iov_base,
1010 caead->dst, caead->len)))
1013 if ((error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base +
1014 caead->len + caead->aadlen, caead->tag, cse->thash->hashsize)))
1018 crypto_freereq(crp);
1019 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
1025 cryptodev_cb(void *op)
1027 struct cryptop *crp = (struct cryptop *) op;
1028 struct csession *cse = (struct csession *)crp->crp_opaque;
1030 mtx_lock(&cse->lock);
1031 cse->error = crp->crp_etype;
1033 mtx_unlock(&cse->lock);
1038 cryptodevkey_cb(void *op)
1040 struct cryptkop *krp = (struct cryptkop *) op;
1047 cryptodev_key(struct crypt_kop *kop)
1049 struct cryptkop *krp = NULL;
1051 int in, out, size, i;
1053 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1057 in = kop->crk_iparams;
1058 out = kop->crk_oparams;
1059 switch (kop->crk_op) {
1061 if (in == 3 && out == 1)
1064 case CRK_MOD_EXP_CRT:
1065 if (in == 6 && out == 1)
1069 if (in == 5 && out == 2)
1072 case CRK_DSA_VERIFY:
1073 if (in == 7 && out == 0)
1076 case CRK_DH_COMPUTE_KEY:
1077 if (in == 3 && out == 1)
1084 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1087 krp->krp_op = kop->crk_op;
1088 krp->krp_status = kop->crk_status;
1089 krp->krp_iparams = kop->crk_iparams;
1090 krp->krp_oparams = kop->crk_oparams;
1091 krp->krp_crid = kop->crk_crid;
1092 krp->krp_status = 0;
1093 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1095 for (i = 0; i < CRK_MAXPARAM; i++) {
1096 if (kop->crk_param[i].crp_nbits > 65536)
1097 /* Limit is the same as in OpenBSD */
1099 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1101 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1102 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1105 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1106 if (i >= krp->krp_iparams)
1108 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1113 error = crypto_kdispatch(krp);
1116 error = tsleep(krp, PSOCK, "crydev", 0);
1118 /* XXX can this happen? if so, how do we recover? */
1122 kop->crk_crid = krp->krp_crid; /* device that did the work */
1123 if (krp->krp_status != 0) {
1124 error = krp->krp_status;
1128 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1129 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1132 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1139 kop->crk_status = krp->krp_status;
1140 for (i = 0; i < CRK_MAXPARAM; i++) {
1141 if (krp->krp_param[i].crp_p)
1142 free(krp->krp_param[i].crp_p, M_XDATA);
1150 cryptodev_find(struct crypt_find_op *find)
1153 size_t fnlen = sizeof find->name;
1155 if (find->crid != -1) {
1156 dev = crypto_find_device_byhid(find->crid);
1159 strncpy(find->name, device_get_nameunit(dev), fnlen);
1160 find->name[fnlen - 1] = '\x0';
1162 find->name[fnlen - 1] = '\x0';
1163 find->crid = crypto_find_driver(find->name);
1164 if (find->crid == -1)
1175 struct ucred *active_cred,
1179 return (EOPNOTSUPP);
1184 cryptof_close(struct file *fp, struct thread *td)
1186 struct fcrypt *fcr = fp->f_data;
1187 struct csession *cse;
1189 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1190 TAILQ_REMOVE(&fcr->csessions, cse, next);
1199 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1202 kif->kf_type = KF_TYPE_CRYPTO;
1206 static struct csession *
1207 csefind(struct fcrypt *fcr, u_int ses)
1209 struct csession *cse;
1211 TAILQ_FOREACH(cse, &fcr->csessions, next)
1212 if (cse->ses == ses)
1218 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1220 struct csession *cse;
1222 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1223 if (cse == cse_del) {
1224 TAILQ_REMOVE(&fcr->csessions, cse, next);
1231 static struct csession *
1232 cseadd(struct fcrypt *fcr, struct csession *cse)
1234 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1235 cse->ses = fcr->sesn++;
1240 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
1241 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1242 struct enc_xform *txform, struct auth_hash *thash)
1244 struct csession *cse;
1246 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1249 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1251 cse->keylen = keylen/8;
1252 cse->mackey = mackey;
1253 cse->mackeylen = mackeylen/8;
1255 cse->cipher = cipher;
1257 cse->txform = txform;
1264 csefree(struct csession *cse)
1268 error = crypto_freesession(cse->sid);
1269 mtx_destroy(&cse->lock);
1271 free(cse->key, M_XDATA);
1273 free(cse->mackey, M_XDATA);
1279 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1285 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1291 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1297 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1305 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1306 TAILQ_INIT(&fcr->csessions);
1309 error = falloc(td, &f, &fd, 0);
1315 /* falloc automatically provides an extra reference to 'f'. */
1316 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1317 *(u_int32_t *)data = fd;
1321 error = cryptodev_find((struct crypt_find_op *)data);
1324 error = crypto_getfeat((int *)data);
1333 static struct cdevsw crypto_cdevsw = {
1334 .d_version = D_VERSION,
1335 .d_flags = D_NEEDGIANT,
1336 .d_open = cryptoopen,
1337 .d_read = cryptoread,
1338 .d_write = cryptowrite,
1339 .d_ioctl = cryptoioctl,
1342 static struct cdev *crypto_dev;
1345 * Initialization code, both for static and dynamic loading.
1348 cryptodev_modevent(module_t mod, int type, void *unused)
1353 printf("crypto: <crypto device>\n");
1354 crypto_dev = make_dev(&crypto_cdevsw, 0,
1355 UID_ROOT, GID_WHEEL, 0666,
1359 /*XXX disallow if active sessions */
1360 destroy_dev(crypto_dev);
1366 static moduledata_t cryptodev_mod = {
1371 MODULE_VERSION(cryptodev, 1);
1372 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1373 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1374 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);