1 /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.4 2003/06/03 00:09:02 sam Exp $ */
2 /* $DragonFly: src/sys/opencrypto/cryptodev.c,v 1.17 2006/05/26 15:55:13 dillon Exp $ */
3 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
6 * Copyright (c) 2001 Theo de Raadt
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * Effort sponsored in part by the Defense Advanced Research Projects
32 * Agency (DARPA) and Air Force Research Laboratory, Air Force
33 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/malloc.h>
41 #include <sys/sysctl.h>
44 #include <sys/filedesc.h>
45 #include <sys/errno.h>
47 #include <sys/random.h>
49 #include <sys/kernel.h>
50 #include <sys/fcntl.h>
52 #include <sys/file2.h>
53 #include <sys/thread2.h>
55 #include <opencrypto/cryptodev.h>
56 #include <opencrypto/xform.h>
59 TAILQ_ENTRY(csession) next;
64 struct enc_xform *txform;
66 struct auth_hash *thash;
70 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
74 u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
76 struct iovec iovec[UIO_MAXIOV];
82 TAILQ_HEAD(csessionlist, csession) csessions;
86 static int cryptof_rw(struct file *fp, struct uio *uio,
87 struct ucred *cred, int flags);
88 static int cryptof_ioctl(struct file *, u_long, caddr_t, struct ucred *);
89 static int cryptof_poll(struct file *, int, struct ucred *);
90 static int cryptof_kqfilter(struct file *, struct knote *);
91 static int cryptof_stat(struct file *, struct stat *, struct ucred *);
92 static int cryptof_close(struct file *);
94 static struct fileops cryptofops = {
107 static struct csession *csefind(struct fcrypt *, u_int);
108 static int csedelete(struct fcrypt *, struct csession *);
109 static struct csession *cseadd(struct fcrypt *, struct csession *);
110 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
111 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
113 static int csefree(struct csession *);
115 static int cryptodev_op(struct csession *, struct crypt_op *);
116 static int cryptodev_key(struct crypt_kop *);
125 struct ucred *active_cred,
132 * MPALMOSTSAFE - acquires mplock
141 struct cryptoini cria, crie;
143 struct csession *cse;
144 struct session_op *sop;
145 struct crypt_op *cop;
146 struct enc_xform *txform = NULL;
147 struct auth_hash *thash = NULL;
153 fcr = (struct fcrypt *)fp->f_data;
157 sop = (struct session_op *)data;
158 switch (sop->cipher) {
162 txform = &enc_xform_des;
164 case CRYPTO_3DES_CBC:
165 txform = &enc_xform_3des;
168 txform = &enc_xform_blf;
170 case CRYPTO_CAST_CBC:
171 txform = &enc_xform_cast5;
173 case CRYPTO_SKIPJACK_CBC:
174 txform = &enc_xform_skipjack;
177 txform = &enc_xform_rijndael128;
179 case CRYPTO_NULL_CBC:
180 txform = &enc_xform_null;
183 txform = &enc_xform_arc4;
195 case CRYPTO_MD5_HMAC:
196 thash = &auth_hash_hmac_md5_96;
198 case CRYPTO_SHA1_HMAC:
199 thash = &auth_hash_hmac_sha1_96;
201 case CRYPTO_SHA2_HMAC:
202 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
203 thash = &auth_hash_hmac_sha2_256;
204 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
205 thash = &auth_hash_hmac_sha2_384;
206 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
207 thash = &auth_hash_hmac_sha2_512;
213 case CRYPTO_RIPEMD160_HMAC:
214 thash = &auth_hash_hmac_ripemd_160_96;
218 thash = &auth_hash_md5;
221 thash = &auth_hash_sha1;
224 case CRYPTO_NULL_HMAC:
225 thash = &auth_hash_null;
234 bzero(&crie, sizeof(crie));
235 bzero(&cria, sizeof(cria));
238 crie.cri_alg = txform->type;
239 crie.cri_klen = sop->keylen * 8;
240 if (sop->keylen > txform->maxkey ||
241 sop->keylen < txform->minkey) {
246 MALLOC(crie.cri_key, u_int8_t *,
247 crie.cri_klen / 8, M_XDATA, M_WAITOK);
248 if ((error = copyin(sop->key, crie.cri_key,
252 crie.cri_next = &cria;
256 cria.cri_alg = thash->type;
257 cria.cri_klen = sop->mackeylen * 8;
258 if (sop->mackeylen != thash->keysize) {
264 MALLOC(cria.cri_key, u_int8_t *,
265 cria.cri_klen / 8, M_XDATA, M_WAITOK);
266 if ((error = copyin(sop->mackey, cria.cri_key,
272 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1);
276 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
277 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
281 crypto_freesession(sid);
290 FREE(crie.cri_key, M_XDATA);
292 FREE(cria.cri_key, M_XDATA);
296 ses = *(u_int32_t *)data;
297 cse = csefind(fcr, ses);
303 error = csefree(cse);
306 cop = (struct crypt_op *)data;
307 cse = csefind(fcr, cop->ses);
312 error = cryptodev_op(cse, cop);
315 error = cryptodev_key((struct crypt_kop *)data);
318 error = crypto_getfeat((int *)data);
328 static int cryptodev_cb(void *);
332 cryptodev_op(struct csession *cse, struct crypt_op *cop)
334 struct cryptop *crp = NULL;
335 struct cryptodesc *crde = NULL, *crda = NULL;
338 if (cop->len > 256*1024-4)
341 if (cse->txform && (cop->len % cse->txform->blocksize) != 0)
344 bzero(&cse->uio, sizeof(cse->uio));
345 cse->uio.uio_iovcnt = 1;
346 cse->uio.uio_resid = 0;
347 cse->uio.uio_segflg = UIO_SYSSPACE;
348 cse->uio.uio_rw = UIO_WRITE;
349 cse->uio.uio_td = curthread;
350 cse->uio.uio_iov = cse->iovec;
351 bzero(&cse->iovec, sizeof(cse->iovec));
352 cse->uio.uio_iov[0].iov_len = cop->len;
353 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
354 for (i = 0; i < cse->uio.uio_iovcnt; i++)
355 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len;
357 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
364 crda = crp->crp_desc;
366 crde = crda->crd_next;
369 crde = crp->crp_desc;
376 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
381 crda->crd_len = cop->len;
382 crda->crd_inject = 0; /* ??? */
384 crda->crd_alg = cse->mac;
385 crda->crd_key = cse->mackey;
386 crda->crd_klen = cse->mackeylen * 8;
390 if (cop->op == COP_ENCRYPT)
391 crde->crd_flags |= CRD_F_ENCRYPT;
393 crde->crd_flags &= ~CRD_F_ENCRYPT;
394 crde->crd_len = cop->len;
395 crde->crd_inject = 0;
397 crde->crd_alg = cse->cipher;
398 crde->crd_key = cse->key;
399 crde->crd_klen = cse->keylen * 8;
402 crp->crp_ilen = cop->len;
403 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
404 | (cop->flags & COP_F_BATCH);
405 crp->crp_buf = (caddr_t)&cse->uio;
406 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
407 crp->crp_sid = cse->sid;
408 crp->crp_opaque = (void *)cse;
415 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
419 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
421 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
422 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
424 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
427 crde->crd_flags |= CRD_F_IV_PRESENT;
428 crde->crd_skip = cse->txform->blocksize;
429 crde->crd_len -= cse->txform->blocksize;
437 crp->crp_mac=cse->tmp_mac;
441 error = crypto_dispatch(crp);
442 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
443 error = tsleep(crp, 0, "crydev", 0);
448 if (crp->crp_etype != 0) {
449 error = crp->crp_etype;
459 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
463 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
469 if (cse->uio.uio_iov[0].iov_base)
470 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
476 cryptodev_cb(void *op)
478 struct cryptop *crp = (struct cryptop *) op;
479 struct csession *cse = (struct csession *)crp->crp_opaque;
481 cse->error = crp->crp_etype;
482 if (crp->crp_etype == EAGAIN)
483 return crypto_dispatch(crp);
489 cryptodevkey_cb(void *op)
491 struct cryptkop *krp = (struct cryptkop *) op;
498 cryptodev_key(struct crypt_kop *kop)
500 struct cryptkop *krp = NULL;
502 int in, out, size, i;
504 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
508 in = kop->crk_iparams;
509 out = kop->crk_oparams;
510 switch (kop->crk_op) {
512 if (in == 3 && out == 1)
515 case CRK_MOD_EXP_CRT:
516 if (in == 6 && out == 1)
520 if (in == 5 && out == 2)
524 if (in == 7 && out == 0)
527 case CRK_DH_COMPUTE_KEY:
528 if (in == 3 && out == 1)
535 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK);
538 bzero(krp, sizeof *krp);
539 krp->krp_op = kop->crk_op;
540 krp->krp_status = kop->crk_status;
541 krp->krp_iparams = kop->crk_iparams;
542 krp->krp_oparams = kop->crk_oparams;
544 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
546 for (i = 0; i < CRK_MAXPARAM; i++)
547 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
548 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
549 size = (krp->krp_param[i].crp_nbits + 7) / 8;
552 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK);
553 if (i >= krp->krp_iparams)
555 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
560 error = crypto_kdispatch(krp);
562 error = tsleep(krp, 0, "crydev", 0);
566 if (krp->krp_status != 0) {
567 error = krp->krp_status;
571 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
572 size = (krp->krp_param[i].crp_nbits + 7) / 8;
575 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
582 kop->crk_status = krp->krp_status;
583 for (i = 0; i < CRK_MAXPARAM; i++) {
584 if (krp->krp_param[i].crp_p)
585 FREE(krp->krp_param[i].crp_p, M_XDATA);
596 cryptof_poll(struct file *fp, int events, struct ucred *active_cred)
605 cryptof_kqfilter(struct file *fp, struct knote *kn)
615 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred)
621 * MPALMOSTSAFE - acquires mplock
624 cryptof_close(struct file *fp)
627 struct csession *cse;
630 fcr = (struct fcrypt *)fp->f_data;
631 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
632 TAILQ_REMOVE(&fcr->csessions, cse, next);
642 static struct csession *
643 csefind(struct fcrypt *fcr, u_int ses)
645 struct csession *cse;
647 TAILQ_FOREACH(cse, &fcr->csessions, next)
654 csedelete(struct fcrypt *fcr, struct csession *cse_del)
656 struct csession *cse;
658 TAILQ_FOREACH(cse, &fcr->csessions, next) {
659 if (cse == cse_del) {
660 TAILQ_REMOVE(&fcr->csessions, cse, next);
667 static struct csession *
668 cseadd(struct fcrypt *fcr, struct csession *cse)
670 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
671 cse->ses = fcr->sesn++;
676 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
677 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
678 struct enc_xform *txform, struct auth_hash *thash)
680 struct csession *cse;
682 MALLOC(cse, struct csession *, sizeof(struct csession),
687 cse->keylen = keylen/8;
688 cse->mackey = mackey;
689 cse->mackeylen = mackeylen/8;
691 cse->cipher = cipher;
693 cse->txform = txform;
700 csefree(struct csession *cse)
704 error = crypto_freesession(cse->sid);
706 FREE(cse->key, M_XDATA);
708 FREE(cse->mackey, M_XDATA);
714 cryptoopen(dev_t dev, int oflags, int devtype, struct thread *td)
716 if (crypto_usercrypto == 0)
722 cryptoread(dev_t dev, struct uio *uio, int ioflag)
728 cryptowrite(dev_t dev, struct uio *uio, int ioflag)
734 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
741 MALLOC(fcr, struct fcrypt *,
742 sizeof(struct fcrypt), M_XDATA, M_WAITOK);
743 TAILQ_INIT(&fcr->csessions);
746 KKASSERT(td->td_proc);
747 error = falloc(td->td_proc, &f, &fd);
753 f->f_type = DTYPE_CRYPTO;
754 f->f_flag = FREAD | FWRITE;
755 f->f_ops = &cryptofops;
757 fsetfd(td->td_proc, f, fd);
758 *(u_int32_t *)data = fd;
768 #define CRYPTO_MAJOR 70 /* from openbsd */
769 static struct cdevsw crypto_cdevsw = {
770 /* dev name */ "crypto",
771 /* dev major */ CRYPTO_MAJOR,
776 /* open */ cryptoopen,
777 /* close */ nullclose,
778 /* read */ cryptoread,
779 /* write */ cryptowrite,
780 /* ioctl */ cryptoioctl,
783 /* strategy */ nostrategy,
790 * Initialization code, both for static and dynamic loading.
793 cryptodev_modevent(module_t mod, int type, void *unused)
798 printf("crypto: <crypto device>\n");
799 cdevsw_add(&crypto_cdevsw, 0, 0);
800 make_dev(&crypto_cdevsw, 0, UID_ROOT, GID_WHEEL,
804 /*XXX disallow if active sessions */
805 cdevsw_remove(&crypto_cdevsw, 0, 0);
811 static moduledata_t cryptodev_mod = {
816 MODULE_VERSION(cryptodev, 1);
817 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
819 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);