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 <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/malloc.h>
49 #include <sys/mutex.h>
50 #include <sys/sysctl.h>
52 #include <sys/filedesc.h>
53 #include <sys/errno.h>
55 #include <sys/random.h>
57 #include <sys/kernel.h>
58 #include <sys/module.h>
59 #include <sys/fcntl.h>
64 #include <opencrypto/cryptodev.h>
65 #include <opencrypto/xform.h>
67 SDT_PROVIDER_DECLARE(opencrypto);
69 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
71 #ifdef COMPAT_FREEBSD32
72 #include <sys/mount.h>
73 #include <compat/freebsd32/freebsd32.h>
85 struct session2_op32 {
118 struct crparam32 crk_param[CRK_MAXPARAM];
121 struct cryptotstat32 {
122 struct timespec32 acc;
123 struct timespec32 min;
124 struct timespec32 max;
128 struct cryptostats32 {
136 u_int32_t cs_kblocks;
137 struct cryptotstat32 cs_invoke;
138 struct cryptotstat32 cs_done;
139 struct cryptotstat32 cs_cb;
140 struct cryptotstat32 cs_finis;
143 #define CIOCGSESSION32 _IOWR('c', 101, struct session_op32)
144 #define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32)
145 #define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32)
146 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
147 #define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32)
149 static struct timeval warninterval = { .tv_sec = 60, .tv_usec = 0 };
150 SYSCTL_TIMEVAL_SEC(_kern, OID_AUTO, cryptodev_warn_interval, CTLFLAG_RW,
152 "Delay in seconds between warnings of deprecated /dev/crypto algorithms");
155 session_op_from_32(const struct session_op32 *from, struct session_op *to)
158 CP(*from, *to, cipher);
160 CP(*from, *to, keylen);
161 PTRIN_CP(*from, *to, key);
162 CP(*from, *to, mackeylen);
163 PTRIN_CP(*from, *to, mackey);
168 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
171 session_op_from_32((const struct session_op32 *)from,
172 (struct session_op *)to);
173 CP(*from, *to, crid);
177 session_op_to_32(const struct session_op *from, struct session_op32 *to)
180 CP(*from, *to, cipher);
182 CP(*from, *to, keylen);
183 PTROUT_CP(*from, *to, key);
184 CP(*from, *to, mackeylen);
185 PTROUT_CP(*from, *to, mackey);
190 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
193 session_op_to_32((const struct session_op *)from,
194 (struct session_op32 *)to);
195 CP(*from, *to, crid);
199 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
204 CP(*from, *to, flags);
206 PTRIN_CP(*from, *to, src);
207 PTRIN_CP(*from, *to, dst);
208 PTRIN_CP(*from, *to, mac);
209 PTRIN_CP(*from, *to, iv);
213 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
218 CP(*from, *to, flags);
220 PTROUT_CP(*from, *to, src);
221 PTROUT_CP(*from, *to, dst);
222 PTROUT_CP(*from, *to, mac);
223 PTROUT_CP(*from, *to, iv);
227 crparam_from_32(const struct crparam32 *from, struct crparam *to)
230 PTRIN_CP(*from, *to, crp_p);
231 CP(*from, *to, crp_nbits);
235 crparam_to_32(const struct crparam *from, struct crparam32 *to)
238 PTROUT_CP(*from, *to, crp_p);
239 CP(*from, *to, crp_nbits);
243 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
247 CP(*from, *to, crk_op);
248 CP(*from, *to, crk_status);
249 CP(*from, *to, crk_iparams);
250 CP(*from, *to, crk_oparams);
251 CP(*from, *to, crk_crid);
252 for (i = 0; i < CRK_MAXPARAM; i++)
253 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
257 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
261 CP(*from, *to, crk_op);
262 CP(*from, *to, crk_status);
263 CP(*from, *to, crk_iparams);
264 CP(*from, *to, crk_oparams);
265 CP(*from, *to, crk_crid);
266 for (i = 0; i < CRK_MAXPARAM; i++)
267 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
272 TAILQ_ENTRY(csession) next;
273 crypto_session_t cses;
275 struct mtx lock; /* for op submission */
278 struct enc_xform *txform;
280 struct auth_hash *thash;
289 struct cryptop_data {
290 struct csession *cse;
292 struct iovec iovec[1];
298 TAILQ_HEAD(csessionlist, csession) csessions;
302 static int cryptof_ioctl(struct file *, u_long, void *,
303 struct ucred *, struct thread *);
304 static int cryptof_stat(struct file *, struct stat *,
305 struct ucred *, struct thread *);
306 static int cryptof_close(struct file *, struct thread *);
307 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
310 static struct fileops cryptofops = {
311 .fo_read = invfo_rdwr,
312 .fo_write = invfo_rdwr,
313 .fo_truncate = invfo_truncate,
314 .fo_ioctl = cryptof_ioctl,
315 .fo_poll = invfo_poll,
316 .fo_kqfilter = invfo_kqfilter,
317 .fo_stat = cryptof_stat,
318 .fo_close = cryptof_close,
319 .fo_chmod = invfo_chmod,
320 .fo_chown = invfo_chown,
321 .fo_sendfile = invfo_sendfile,
322 .fo_fill_kinfo = cryptof_fill_kinfo,
325 static struct csession *csefind(struct fcrypt *, u_int);
326 static int csedelete(struct fcrypt *, struct csession *);
327 static struct csession *cseadd(struct fcrypt *, struct csession *);
328 static struct csession *csecreate(struct fcrypt *, crypto_session_t, caddr_t,
329 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
331 static void csefree(struct csession *);
333 static int cryptodev_op(struct csession *, struct crypt_op *,
334 struct ucred *, struct thread *td);
335 static int cryptodev_aead(struct csession *, struct crypt_aead *,
336 struct ucred *, struct thread *);
337 static int cryptodev_key(struct crypt_kop *);
338 static int cryptodev_find(struct crypt_find_op *);
341 * Check a crypto identifier to see if it requested
342 * a software device/driver. This can be done either
343 * by device name/class or through search constraints.
346 checkforsoftware(int *cridp)
352 if (!crypto_devallowsoft) {
353 if (crid & CRYPTOCAP_F_SOFTWARE) {
354 if (crid & CRYPTOCAP_F_HARDWARE) {
355 *cridp = CRYPTOCAP_F_HARDWARE;
360 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
361 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
373 struct ucred *active_cred,
376 #define SES2(p) ((struct session2_op *)p)
377 struct cryptoini cria, crie;
378 struct fcrypt *fcr = fp->f_data;
379 struct csession *cse;
380 struct session_op *sop;
381 struct crypt_op *cop;
382 struct crypt_aead *caead;
383 struct enc_xform *txform = NULL;
384 struct auth_hash *thash = NULL;
385 struct crypt_kop *kop;
386 crypto_session_t cses;
389 #ifdef COMPAT_FREEBSD32
390 struct session2_op sopc;
391 struct crypt_op copc;
392 struct crypt_kop kopc;
394 static struct timeval arc4warn, blfwarn, castwarn, deswarn, md5warn;
395 static struct timeval skipwarn, tdeswarn;
400 #ifdef COMPAT_FREEBSD32
402 case CIOCGSESSION232:
403 if (cmd == CIOCGSESSION32) {
404 session_op_from_32(data, (struct session_op *)&sopc);
405 sop = (struct session_op *)&sopc;
406 } else if (cmd == CIOCGSESSION232) {
407 session2_op_from_32(data, &sopc);
408 sop = (struct session_op *)&sopc;
411 sop = (struct session_op *)data;
412 switch (sop->cipher) {
416 if (ratecheck(&deswarn, &warninterval))
417 gone_in(13, "DES cipher via /dev/crypto");
418 txform = &enc_xform_des;
420 case CRYPTO_3DES_CBC:
421 if (ratecheck(&tdeswarn, &warninterval))
422 gone_in(13, "3DES cipher via /dev/crypto");
423 txform = &enc_xform_3des;
426 if (ratecheck(&blfwarn, &warninterval))
427 gone_in(13, "Blowfish cipher via /dev/crypto");
428 txform = &enc_xform_blf;
430 case CRYPTO_CAST_CBC:
431 if (ratecheck(&castwarn, &warninterval))
432 gone_in(13, "CAST128 cipher via /dev/crypto");
433 txform = &enc_xform_cast5;
435 case CRYPTO_SKIPJACK_CBC:
436 if (ratecheck(&skipwarn, &warninterval))
437 gone_in(13, "Skipjack cipher via /dev/crypto");
438 txform = &enc_xform_skipjack;
441 txform = &enc_xform_rijndael128;
444 txform = &enc_xform_aes_xts;
446 case CRYPTO_NULL_CBC:
447 txform = &enc_xform_null;
450 if (ratecheck(&arc4warn, &warninterval))
451 gone_in(13, "ARC4 cipher via /dev/crypto");
452 txform = &enc_xform_arc4;
454 case CRYPTO_CAMELLIA_CBC:
455 txform = &enc_xform_camellia;
458 txform = &enc_xform_aes_icm;
460 case CRYPTO_AES_NIST_GCM_16:
461 txform = &enc_xform_aes_nist_gcm;
463 case CRYPTO_CHACHA20:
464 txform = &enc_xform_chacha20;
466 case CRYPTO_AES_CCM_16:
467 txform = &enc_xform_ccm;
471 CRYPTDEB("invalid cipher");
472 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
479 case CRYPTO_MD5_HMAC:
480 if (ratecheck(&md5warn, &warninterval))
482 "MD5-HMAC authenticator via /dev/crypto");
483 thash = &auth_hash_hmac_md5;
485 case CRYPTO_POLY1305:
486 thash = &auth_hash_poly1305;
488 case CRYPTO_SHA1_HMAC:
489 thash = &auth_hash_hmac_sha1;
491 case CRYPTO_SHA2_224_HMAC:
492 thash = &auth_hash_hmac_sha2_224;
494 case CRYPTO_SHA2_256_HMAC:
495 thash = &auth_hash_hmac_sha2_256;
497 case CRYPTO_SHA2_384_HMAC:
498 thash = &auth_hash_hmac_sha2_384;
500 case CRYPTO_SHA2_512_HMAC:
501 thash = &auth_hash_hmac_sha2_512;
503 case CRYPTO_RIPEMD160_HMAC:
504 thash = &auth_hash_hmac_ripemd_160;
506 case CRYPTO_AES_128_NIST_GMAC:
507 thash = &auth_hash_nist_gmac_aes_128;
509 case CRYPTO_AES_192_NIST_GMAC:
510 thash = &auth_hash_nist_gmac_aes_192;
512 case CRYPTO_AES_256_NIST_GMAC:
513 thash = &auth_hash_nist_gmac_aes_256;
516 case CRYPTO_AES_CCM_CBC_MAC:
517 switch (sop->keylen) {
519 thash = &auth_hash_ccm_cbc_mac_128;
522 thash = &auth_hash_ccm_cbc_mac_192;
525 thash = &auth_hash_ccm_cbc_mac_256;
528 CRYPTDEB("Invalid CBC MAC key size %d",
530 SDT_PROBE1(opencrypto, dev, ioctl,
537 thash = &auth_hash_md5;
541 thash = &auth_hash_sha1;
543 case CRYPTO_SHA2_224:
544 thash = &auth_hash_sha2_224;
546 case CRYPTO_SHA2_256:
547 thash = &auth_hash_sha2_256;
549 case CRYPTO_SHA2_384:
550 thash = &auth_hash_sha2_384;
552 case CRYPTO_SHA2_512:
553 thash = &auth_hash_sha2_512;
556 case CRYPTO_NULL_HMAC:
557 thash = &auth_hash_null;
561 thash = &auth_hash_blake2b;
564 thash = &auth_hash_blake2s;
568 CRYPTDEB("invalid mac");
569 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
573 bzero(&crie, sizeof(crie));
574 bzero(&cria, sizeof(cria));
577 crie.cri_alg = txform->type;
578 crie.cri_klen = sop->keylen * 8;
579 if (sop->keylen > txform->maxkey ||
580 sop->keylen < txform->minkey) {
581 CRYPTDEB("invalid cipher parameters");
583 SDT_PROBE1(opencrypto, dev, ioctl, error,
588 crie.cri_key = malloc(crie.cri_klen / 8,
590 if ((error = copyin(sop->key, crie.cri_key,
591 crie.cri_klen / 8))) {
592 CRYPTDEB("invalid key");
593 SDT_PROBE1(opencrypto, dev, ioctl, error,
598 crie.cri_next = &cria;
602 cria.cri_alg = thash->type;
603 cria.cri_klen = sop->mackeylen * 8;
604 if (thash->keysize != 0 &&
605 sop->mackeylen > thash->keysize) {
606 CRYPTDEB("invalid mac key length");
608 SDT_PROBE1(opencrypto, dev, ioctl, error,
614 cria.cri_key = malloc(cria.cri_klen / 8,
616 if ((error = copyin(sop->mackey, cria.cri_key,
617 cria.cri_klen / 8))) {
618 CRYPTDEB("invalid mac key");
619 SDT_PROBE1(opencrypto, dev, ioctl,
626 /* NB: CIOCGSESSION2 has the crid */
627 if (cmd == CIOCGSESSION2
628 #ifdef COMPAT_FREEBSD32
629 || cmd == CIOCGSESSION232
632 crid = SES2(sop)->crid;
633 error = checkforsoftware(&crid);
635 CRYPTDEB("checkforsoftware");
636 SDT_PROBE1(opencrypto, dev, ioctl, error,
641 crid = CRYPTOCAP_F_HARDWARE;
642 error = crypto_newsession(&cses, (txform ? &crie : &cria), crid);
644 CRYPTDEB("crypto_newsession");
645 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
649 cse = csecreate(fcr, cses, crie.cri_key, crie.cri_klen,
650 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
654 crypto_freesession(cses);
656 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
657 CRYPTDEB("csecreate");
661 if (cmd == CIOCGSESSION2
662 #ifdef COMPAT_FREEBSD32
663 || cmd == CIOCGSESSION232
666 /* return hardware/driver id */
667 SES2(sop)->crid = crypto_ses2hid(cse->cses);
672 free(crie.cri_key, M_XDATA);
674 free(cria.cri_key, M_XDATA);
676 #ifdef COMPAT_FREEBSD32
678 if (cmd == CIOCGSESSION32)
679 session_op_to_32(sop, data);
680 else if (cmd == CIOCGSESSION232)
681 session2_op_to_32((struct session2_op *)sop,
687 ses = *(u_int32_t *)data;
688 cse = csefind(fcr, ses);
690 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
697 #ifdef COMPAT_FREEBSD32
699 if (cmd == CIOCCRYPT32) {
701 crypt_op_from_32(data, cop);
704 cop = (struct crypt_op *)data;
705 cse = csefind(fcr, cop->ses);
707 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
710 error = cryptodev_op(cse, cop, active_cred, td);
711 #ifdef COMPAT_FREEBSD32
712 if (error == 0 && cmd == CIOCCRYPT32)
713 crypt_op_to_32(cop, data);
718 #ifdef COMPAT_FREEBSD32
722 if (!crypto_userasymcrypto) {
723 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
724 return (EPERM); /* XXX compat? */
726 #ifdef COMPAT_FREEBSD32
727 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
729 crypt_kop_from_32(data, kop);
732 kop = (struct crypt_kop *)data;
734 #ifdef COMPAT_FREEBSD32
738 /* NB: crypto core enforces s/w driver use */
740 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
743 error = cryptodev_key(kop);
745 #ifdef COMPAT_FREEBSD32
746 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
747 crypt_kop_to_32(kop, data);
751 if (!crypto_userasymcrypto) {
753 * NB: if user asym crypto operations are
754 * not permitted return "no algorithms"
755 * so well-behaved applications will just
756 * fallback to doing them in software.
760 error = crypto_getfeat((int *)data);
762 SDT_PROBE1(opencrypto, dev, ioctl, error,
767 error = cryptodev_find((struct crypt_find_op *)data);
770 caead = (struct crypt_aead *)data;
771 cse = csefind(fcr, caead->ses);
773 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
776 error = cryptodev_aead(cse, caead, active_cred, td);
780 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
787 static int cryptodev_cb(struct cryptop *);
789 static struct cryptop_data *
790 cod_alloc(struct csession *cse, size_t len, struct thread *td)
792 struct cryptop_data *cod;
795 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
799 uio->uio_iov = cod->iovec;
801 uio->uio_resid = len;
802 uio->uio_segflg = UIO_SYSSPACE;
803 uio->uio_rw = UIO_WRITE;
805 uio->uio_iov[0].iov_len = len;
806 uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
811 cod_free(struct cryptop_data *cod)
814 free(cod->uio.uio_iov[0].iov_base, M_XDATA);
820 struct csession *cse,
821 struct crypt_op *cop,
822 struct ucred *active_cred,
825 struct cryptop_data *cod = NULL;
826 struct cryptop *crp = NULL;
827 struct cryptodesc *crde = NULL, *crda = NULL;
830 if (cop->len > 256*1024-4) {
831 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
836 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
837 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
843 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
845 cod = cod_alloc(cse, cop->len, td);
847 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
849 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
854 if (cse->thash && cse->txform) {
855 if (cop->flags & COP_F_CIPHER_FIRST) {
856 crde = crp->crp_desc;
857 crda = crde->crd_next;
859 crda = crp->crp_desc;
860 crde = crda->crd_next;
862 } else if (cse->thash) {
863 crda = crp->crp_desc;
864 } else if (cse->txform) {
865 crde = crp->crp_desc;
867 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
872 if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
874 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
880 crda->crd_len = cop->len;
881 crda->crd_inject = cop->len;
883 crda->crd_alg = cse->mac;
884 crda->crd_key = cse->mackey;
885 crda->crd_klen = cse->mackeylen * 8;
889 if (cop->op == COP_ENCRYPT)
890 crde->crd_flags |= CRD_F_ENCRYPT;
892 crde->crd_flags &= ~CRD_F_ENCRYPT;
893 crde->crd_len = cop->len;
894 crde->crd_inject = 0;
896 crde->crd_alg = cse->cipher;
897 crde->crd_key = cse->key;
898 crde->crd_klen = cse->keylen * 8;
901 crp->crp_ilen = cop->len;
902 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
903 | (cop->flags & COP_F_BATCH);
904 crp->crp_uio = &cod->uio;
905 crp->crp_callback = cryptodev_cb;
906 crp->crp_session = cse->cses;
907 crp->crp_opaque = cod;
911 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
915 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
916 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
920 if ((error = copyin(cop->iv, crde->crd_iv,
921 cse->txform->ivsize))) {
922 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
925 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
927 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
930 crde->crd_flags |= CRD_F_IV_PRESENT;
931 crde->crd_skip = cse->txform->ivsize;
932 crde->crd_len -= cse->txform->ivsize;
935 if (cop->mac && crda == NULL) {
936 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
943 * Let the dispatch run unlocked, then, interlock against the
944 * callback before checking if the operation completed and going
945 * to sleep. This insures drivers don't inherit our lock which
946 * results in a lock order reversal between crypto_dispatch forced
947 * entry and the crypto_done callback into us.
949 error = crypto_dispatch(crp);
951 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
955 mtx_lock(&cse->lock);
957 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
958 mtx_unlock(&cse->lock);
960 if (crp->crp_etype == EAGAIN) {
962 crp->crp_flags &= ~CRYPTO_F_DONE;
967 if (crp->crp_etype != 0) {
968 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
969 error = crp->crp_etype;
974 (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
976 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
981 (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
982 cop->mac, cse->thash->hashsize))) {
983 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
998 struct csession *cse,
999 struct crypt_aead *caead,
1000 struct ucred *active_cred,
1003 struct cryptop_data *cod = NULL;
1004 struct cryptop *crp = NULL;
1005 struct cryptodesc *crde = NULL, *crda = NULL;
1008 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1009 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1013 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
1014 (caead->len % cse->txform->blocksize) != 0) {
1015 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1019 cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
1022 crp = crypto_getreq(2);
1025 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1029 if (caead->flags & COP_F_CIPHER_FIRST) {
1030 crde = crp->crp_desc;
1031 crda = crde->crd_next;
1033 crda = crp->crp_desc;
1034 crde = crda->crd_next;
1037 if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
1039 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1043 if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
1044 caead->aadlen, caead->len))) {
1045 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1050 * For GCM/CCM, crd_len covers only the AAD. For other ciphers
1051 * chained with an HMAC, crd_len covers both the AAD and the
1055 if (cse->cipher == CRYPTO_AES_NIST_GCM_16 ||
1056 cse->cipher == CRYPTO_AES_CCM_16)
1057 crda->crd_len = caead->aadlen;
1059 crda->crd_len = caead->aadlen + caead->len;
1060 crda->crd_inject = caead->aadlen + caead->len;
1062 crda->crd_alg = cse->mac;
1063 crda->crd_key = cse->mackey;
1064 crda->crd_klen = cse->mackeylen * 8;
1066 if (caead->op == COP_ENCRYPT)
1067 crde->crd_flags |= CRD_F_ENCRYPT;
1069 crde->crd_flags &= ~CRD_F_ENCRYPT;
1070 crde->crd_skip = caead->aadlen;
1071 crde->crd_len = caead->len;
1072 crde->crd_inject = caead->aadlen;
1074 crde->crd_alg = cse->cipher;
1075 crde->crd_key = cse->key;
1076 crde->crd_klen = cse->keylen * 8;
1078 crp->crp_ilen = caead->aadlen + caead->len;
1079 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1080 | (caead->flags & COP_F_BATCH);
1081 crp->crp_uio = &cod->uio;
1082 crp->crp_callback = cryptodev_cb;
1083 crp->crp_session = cse->cses;
1084 crp->crp_opaque = cod;
1087 if (caead->ivlen > sizeof(crde->crd_iv)) {
1089 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1093 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1094 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1097 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1099 crde->crd_flags |= CRD_F_IV_PRESENT;
1100 crde->crd_skip += cse->txform->ivsize;
1101 crde->crd_len -= cse->txform->ivsize;
1104 if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1105 caead->len + caead->aadlen, cse->thash->hashsize))) {
1106 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1111 * Let the dispatch run unlocked, then, interlock against the
1112 * callback before checking if the operation completed and going
1113 * to sleep. This insures drivers don't inherit our lock which
1114 * results in a lock order reversal between crypto_dispatch forced
1115 * entry and the crypto_done callback into us.
1117 error = crypto_dispatch(crp);
1119 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1123 mtx_lock(&cse->lock);
1125 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1126 mtx_unlock(&cse->lock);
1128 if (crp->crp_etype == EAGAIN) {
1130 crp->crp_flags &= ~CRYPTO_F_DONE;
1135 if (crp->crp_etype != 0) {
1136 error = crp->crp_etype;
1137 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1141 if (caead->dst && (error = copyout(
1142 (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1144 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1148 if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1149 caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1150 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1155 crypto_freereq(crp);
1163 cryptodev_cb(struct cryptop *crp)
1165 struct cryptop_data *cod = crp->crp_opaque;
1168 * Lock to ensure the wakeup() is not missed by the loops
1169 * waiting on cod->done in cryptodev_op() and
1172 mtx_lock(&cod->cse->lock);
1174 mtx_unlock(&cod->cse->lock);
1180 cryptodevkey_cb(void *op)
1182 struct cryptkop *krp = (struct cryptkop *) op;
1189 cryptodev_key(struct crypt_kop *kop)
1191 struct cryptkop *krp = NULL;
1193 int in, out, size, i;
1195 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1196 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1200 in = kop->crk_iparams;
1201 out = kop->crk_oparams;
1202 switch (kop->crk_op) {
1204 if (in == 3 && out == 1)
1206 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1208 case CRK_MOD_EXP_CRT:
1209 if (in == 6 && out == 1)
1211 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1214 if (in == 5 && out == 2)
1216 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1218 case CRK_DSA_VERIFY:
1219 if (in == 7 && out == 0)
1221 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1223 case CRK_DH_COMPUTE_KEY:
1224 if (in == 3 && out == 1)
1226 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1229 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1233 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1235 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1238 krp->krp_op = kop->crk_op;
1239 krp->krp_status = kop->crk_status;
1240 krp->krp_iparams = kop->crk_iparams;
1241 krp->krp_oparams = kop->crk_oparams;
1242 krp->krp_crid = kop->crk_crid;
1243 krp->krp_status = 0;
1244 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1246 for (i = 0; i < CRK_MAXPARAM; i++) {
1247 if (kop->crk_param[i].crp_nbits > 65536) {
1248 /* Limit is the same as in OpenBSD */
1249 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1252 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1254 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1255 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1258 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1259 if (i >= krp->krp_iparams)
1261 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1263 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1268 error = crypto_kdispatch(krp);
1270 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1273 error = tsleep(krp, PSOCK, "crydev", 0);
1275 /* XXX can this happen? if so, how do we recover? */
1276 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1280 kop->crk_crid = krp->krp_crid; /* device that did the work */
1281 if (krp->krp_status != 0) {
1282 error = krp->krp_status;
1283 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1287 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1288 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1291 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1293 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1300 kop->crk_status = krp->krp_status;
1301 for (i = 0; i < CRK_MAXPARAM; i++) {
1302 if (krp->krp_param[i].crp_p)
1303 free(krp->krp_param[i].crp_p, M_XDATA);
1311 cryptodev_find(struct crypt_find_op *find)
1314 size_t fnlen = sizeof find->name;
1316 if (find->crid != -1) {
1317 dev = crypto_find_device_byhid(find->crid);
1320 strncpy(find->name, device_get_nameunit(dev), fnlen);
1321 find->name[fnlen - 1] = '\x0';
1323 find->name[fnlen - 1] = '\x0';
1324 find->crid = crypto_find_driver(find->name);
1325 if (find->crid == -1)
1336 struct ucred *active_cred,
1340 return (EOPNOTSUPP);
1345 cryptof_close(struct file *fp, struct thread *td)
1347 struct fcrypt *fcr = fp->f_data;
1348 struct csession *cse;
1350 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1351 TAILQ_REMOVE(&fcr->csessions, cse, next);
1360 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1363 kif->kf_type = KF_TYPE_CRYPTO;
1367 static struct csession *
1368 csefind(struct fcrypt *fcr, u_int ses)
1370 struct csession *cse;
1372 TAILQ_FOREACH(cse, &fcr->csessions, next)
1373 if (cse->ses == ses)
1379 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1381 struct csession *cse;
1383 TAILQ_FOREACH(cse, &fcr->csessions, next) {
1384 if (cse == cse_del) {
1385 TAILQ_REMOVE(&fcr->csessions, cse, next);
1392 static struct csession *
1393 cseadd(struct fcrypt *fcr, struct csession *cse)
1395 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1396 cse->ses = fcr->sesn++;
1401 csecreate(struct fcrypt *fcr, crypto_session_t cses, caddr_t key, u_int64_t keylen,
1402 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1403 struct enc_xform *txform, struct auth_hash *thash)
1405 struct csession *cse;
1407 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1410 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1412 cse->keylen = keylen/8;
1413 cse->mackey = mackey;
1414 cse->mackeylen = mackeylen/8;
1416 cse->cipher = cipher;
1418 cse->txform = txform;
1425 csefree(struct csession *cse)
1428 crypto_freesession(cse->cses);
1429 mtx_destroy(&cse->lock);
1431 free(cse->key, M_XDATA);
1433 free(cse->mackey, M_XDATA);
1438 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1444 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1450 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1456 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1464 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1465 TAILQ_INIT(&fcr->csessions);
1468 error = falloc(td, &f, &fd, 0);
1474 /* falloc automatically provides an extra reference to 'f'. */
1475 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1476 *(u_int32_t *)data = fd;
1480 error = cryptodev_find((struct crypt_find_op *)data);
1483 error = crypto_getfeat((int *)data);
1492 static struct cdevsw crypto_cdevsw = {
1493 .d_version = D_VERSION,
1494 .d_flags = D_NEEDGIANT,
1495 .d_open = cryptoopen,
1496 .d_read = cryptoread,
1497 .d_write = cryptowrite,
1498 .d_ioctl = cryptoioctl,
1501 static struct cdev *crypto_dev;
1504 * Initialization code, both for static and dynamic loading.
1507 cryptodev_modevent(module_t mod, int type, void *unused)
1512 printf("crypto: <crypto device>\n");
1513 crypto_dev = make_dev(&crypto_cdevsw, 0,
1514 UID_ROOT, GID_WHEEL, 0666,
1518 /*XXX disallow if active sessions */
1519 destroy_dev(crypto_dev);
1525 static moduledata_t cryptodev_mod = {
1530 MODULE_VERSION(cryptodev, 1);
1531 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1532 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1533 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);