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 1.10 2005/06/10 22:16:05 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>
43 #include <sys/filedesc.h>
44 #include <sys/errno.h>
46 #include <sys/random.h>
48 #include <sys/kernel.h>
49 #include <sys/fcntl.h>
51 #include <sys/file2.h>
52 #include <sys/thread2.h>
54 #include <opencrypto/cryptodev.h>
55 #include <opencrypto/xform.h>
58 TAILQ_ENTRY(csession) next;
63 struct enc_xform *txform;
65 struct auth_hash *thash;
69 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
73 u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
75 struct iovec iovec[UIO_MAXIOV];
81 TAILQ_HEAD(csessionlist, csession) csessions;
85 static int cryptof_rw(struct file *fp, struct uio *uio,
86 struct ucred *cred, int flags, struct thread *);
87 static int cryptof_ioctl(struct file *, u_long, caddr_t, struct thread *);
88 static int cryptof_poll(struct file *, int, struct ucred *, struct thread *);
89 static int cryptof_kqfilter(struct file *, struct knote *);
90 static int cryptof_stat(struct file *, struct stat *, struct thread *);
91 static int cryptof_close(struct file *, struct thread *);
93 static struct fileops cryptofops = {
105 static struct csession *csefind(struct fcrypt *, u_int);
106 static int csedelete(struct fcrypt *, struct csession *);
107 static struct csession *cseadd(struct fcrypt *, struct csession *);
108 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
109 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
111 static int csefree(struct csession *);
113 static int cryptodev_op(struct csession *, struct crypt_op *,
115 static int cryptodev_key(struct crypt_kop *);
121 struct ucred *active_cred,
137 struct cryptoini cria, crie;
138 struct fcrypt *fcr = (struct fcrypt *)fp->f_data;
139 struct csession *cse;
140 struct session_op *sop;
141 struct crypt_op *cop;
142 struct enc_xform *txform = NULL;
143 struct auth_hash *thash = NULL;
150 sop = (struct session_op *)data;
151 switch (sop->cipher) {
155 txform = &enc_xform_des;
157 case CRYPTO_3DES_CBC:
158 txform = &enc_xform_3des;
161 txform = &enc_xform_blf;
163 case CRYPTO_CAST_CBC:
164 txform = &enc_xform_cast5;
166 case CRYPTO_SKIPJACK_CBC:
167 txform = &enc_xform_skipjack;
170 txform = &enc_xform_rijndael128;
172 case CRYPTO_NULL_CBC:
173 txform = &enc_xform_null;
176 txform = &enc_xform_arc4;
185 case CRYPTO_MD5_HMAC:
186 thash = &auth_hash_hmac_md5_96;
188 case CRYPTO_SHA1_HMAC:
189 thash = &auth_hash_hmac_sha1_96;
191 case CRYPTO_SHA2_HMAC:
192 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
193 thash = &auth_hash_hmac_sha2_256;
194 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
195 thash = &auth_hash_hmac_sha2_384;
196 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
197 thash = &auth_hash_hmac_sha2_512;
201 case CRYPTO_RIPEMD160_HMAC:
202 thash = &auth_hash_hmac_ripemd_160_96;
206 thash = &auth_hash_md5;
209 thash = &auth_hash_sha1;
212 case CRYPTO_NULL_HMAC:
213 thash = &auth_hash_null;
219 bzero(&crie, sizeof(crie));
220 bzero(&cria, sizeof(cria));
223 crie.cri_alg = txform->type;
224 crie.cri_klen = sop->keylen * 8;
225 if (sop->keylen > txform->maxkey ||
226 sop->keylen < txform->minkey) {
231 MALLOC(crie.cri_key, u_int8_t *,
232 crie.cri_klen / 8, M_XDATA, M_WAITOK);
233 if ((error = copyin(sop->key, crie.cri_key,
237 crie.cri_next = &cria;
241 cria.cri_alg = thash->type;
242 cria.cri_klen = sop->mackeylen * 8;
243 if (sop->mackeylen != thash->keysize) {
249 MALLOC(cria.cri_key, u_int8_t *,
250 cria.cri_klen / 8, M_XDATA, M_WAITOK);
251 if ((error = copyin(sop->mackey, cria.cri_key,
257 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1);
261 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
262 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
266 crypto_freesession(sid);
275 FREE(crie.cri_key, M_XDATA);
277 FREE(cria.cri_key, M_XDATA);
281 ses = *(u_int32_t *)data;
282 cse = csefind(fcr, ses);
286 error = csefree(cse);
289 cop = (struct crypt_op *)data;
290 cse = csefind(fcr, cop->ses);
293 error = cryptodev_op(cse, cop, td);
296 error = cryptodev_key((struct crypt_kop *)data);
299 error = crypto_getfeat((int *)data);
307 static int cryptodev_cb(void *);
312 struct csession *cse,
313 struct crypt_op *cop,
316 struct cryptop *crp = NULL;
317 struct cryptodesc *crde = NULL, *crda = NULL;
320 if (cop->len > 256*1024-4)
323 if (cse->txform && (cop->len % cse->txform->blocksize) != 0)
326 bzero(&cse->uio, sizeof(cse->uio));
327 cse->uio.uio_iovcnt = 1;
328 cse->uio.uio_resid = 0;
329 cse->uio.uio_segflg = UIO_SYSSPACE;
330 cse->uio.uio_rw = UIO_WRITE;
331 cse->uio.uio_td = td;
332 cse->uio.uio_iov = cse->iovec;
333 bzero(&cse->iovec, sizeof(cse->iovec));
334 cse->uio.uio_iov[0].iov_len = cop->len;
335 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
336 for (i = 0; i < cse->uio.uio_iovcnt; i++)
337 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len;
339 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
346 crda = crp->crp_desc;
348 crde = crda->crd_next;
351 crde = crp->crp_desc;
358 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
363 crda->crd_len = cop->len;
364 crda->crd_inject = 0; /* ??? */
366 crda->crd_alg = cse->mac;
367 crda->crd_key = cse->mackey;
368 crda->crd_klen = cse->mackeylen * 8;
372 if (cop->op == COP_ENCRYPT)
373 crde->crd_flags |= CRD_F_ENCRYPT;
375 crde->crd_flags &= ~CRD_F_ENCRYPT;
376 crde->crd_len = cop->len;
377 crde->crd_inject = 0;
379 crde->crd_alg = cse->cipher;
380 crde->crd_key = cse->key;
381 crde->crd_klen = cse->keylen * 8;
384 crp->crp_ilen = cop->len;
385 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
386 | (cop->flags & COP_F_BATCH);
387 crp->crp_buf = (caddr_t)&cse->uio;
388 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
389 crp->crp_sid = cse->sid;
390 crp->crp_opaque = (void *)cse;
397 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
401 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
403 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
404 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
406 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
409 crde->crd_flags |= CRD_F_IV_PRESENT;
410 crde->crd_skip = cse->txform->blocksize;
411 crde->crd_len -= cse->txform->blocksize;
419 crp->crp_mac=cse->tmp_mac;
423 error = crypto_dispatch(crp);
424 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
425 error = tsleep(crp, 0, "crydev", 0);
430 if (crp->crp_etype != 0) {
431 error = crp->crp_etype;
441 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
445 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
451 if (cse->uio.uio_iov[0].iov_base)
452 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
458 cryptodev_cb(void *op)
460 struct cryptop *crp = (struct cryptop *) op;
461 struct csession *cse = (struct csession *)crp->crp_opaque;
463 cse->error = crp->crp_etype;
464 if (crp->crp_etype == EAGAIN)
465 return crypto_dispatch(crp);
471 cryptodevkey_cb(void *op)
473 struct cryptkop *krp = (struct cryptkop *) op;
480 cryptodev_key(struct crypt_kop *kop)
482 struct cryptkop *krp = NULL;
484 int in, out, size, i;
486 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
490 in = kop->crk_iparams;
491 out = kop->crk_oparams;
492 switch (kop->crk_op) {
494 if (in == 3 && out == 1)
497 case CRK_MOD_EXP_CRT:
498 if (in == 6 && out == 1)
502 if (in == 5 && out == 2)
506 if (in == 7 && out == 0)
509 case CRK_DH_COMPUTE_KEY:
510 if (in == 3 && out == 1)
517 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK);
520 bzero(krp, sizeof *krp);
521 krp->krp_op = kop->crk_op;
522 krp->krp_status = kop->crk_status;
523 krp->krp_iparams = kop->crk_iparams;
524 krp->krp_oparams = kop->crk_oparams;
526 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
528 for (i = 0; i < CRK_MAXPARAM; i++)
529 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
530 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
531 size = (krp->krp_param[i].crp_nbits + 7) / 8;
534 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK);
535 if (i >= krp->krp_iparams)
537 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
542 error = crypto_kdispatch(krp);
544 error = tsleep(krp, 0, "crydev", 0);
548 if (krp->krp_status != 0) {
549 error = krp->krp_status;
553 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
554 size = (krp->krp_param[i].crp_nbits + 7) / 8;
557 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
564 kop->crk_status = krp->krp_status;
565 for (i = 0; i < CRK_MAXPARAM; i++) {
566 if (krp->krp_param[i].crp_p)
567 FREE(krp->krp_param[i].crp_p, M_XDATA);
579 struct ucred *active_cred,
588 cryptof_kqfilter(struct file *fp, struct knote *kn)
607 cryptof_close(struct file *fp, struct thread *td)
609 struct fcrypt *fcr = (struct fcrypt *)fp->f_data;
610 struct csession *cse;
612 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
613 TAILQ_REMOVE(&fcr->csessions, cse, next);
621 static struct csession *
622 csefind(struct fcrypt *fcr, u_int ses)
624 struct csession *cse;
626 TAILQ_FOREACH(cse, &fcr->csessions, next)
633 csedelete(struct fcrypt *fcr, struct csession *cse_del)
635 struct csession *cse;
637 TAILQ_FOREACH(cse, &fcr->csessions, next) {
638 if (cse == cse_del) {
639 TAILQ_REMOVE(&fcr->csessions, cse, next);
646 static struct csession *
647 cseadd(struct fcrypt *fcr, struct csession *cse)
649 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
650 cse->ses = fcr->sesn++;
655 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
656 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
657 struct enc_xform *txform, struct auth_hash *thash)
659 struct csession *cse;
661 MALLOC(cse, struct csession *, sizeof(struct csession),
666 cse->keylen = keylen/8;
667 cse->mackey = mackey;
668 cse->mackeylen = mackeylen/8;
670 cse->cipher = cipher;
672 cse->txform = txform;
679 csefree(struct csession *cse)
683 error = crypto_freesession(cse->sid);
685 FREE(cse->key, M_XDATA);
687 FREE(cse->mackey, M_XDATA);
693 cryptoopen(dev_t dev, int oflags, int devtype, struct thread *td)
695 if (crypto_usercrypto == 0)
701 cryptoread(dev_t dev, struct uio *uio, int ioflag)
707 cryptowrite(dev_t dev, struct uio *uio, int ioflag)
713 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
720 MALLOC(fcr, struct fcrypt *,
721 sizeof(struct fcrypt), M_XDATA, M_WAITOK);
722 TAILQ_INIT(&fcr->csessions);
725 KKASSERT(td->td_proc);
726 error = falloc(td->td_proc, &f, &fd);
732 f->f_flag = FREAD | FWRITE;
733 f->f_type = DTYPE_CRYPTO;
734 f->f_ops = &cryptofops;
735 f->f_data = (caddr_t) fcr;
736 *(u_int32_t *)data = fd;
746 #define CRYPTO_MAJOR 70 /* from openbsd */
747 static struct cdevsw crypto_cdevsw = {
748 /* dev name */ "crypto",
749 /* dev major */ CRYPTO_MAJOR,
754 /* open */ cryptoopen,
755 /* close */ nullclose,
756 /* read */ cryptoread,
757 /* write */ cryptowrite,
758 /* ioctl */ cryptoioctl,
761 /* strategy */ nostrategy,
768 * Initialization code, both for static and dynamic loading.
771 cryptodev_modevent(module_t mod, int type, void *unused)
776 printf("crypto: <crypto device>\n");
777 cdevsw_add(&crypto_cdevsw, 0, 0);
778 make_dev(&crypto_cdevsw, 0, UID_ROOT, GID_WHEEL,
782 /*XXX disallow if active sessions */
783 cdevsw_remove(&crypto_cdevsw, 0, 0);
789 static moduledata_t cryptodev_mod = {
794 MODULE_VERSION(cryptodev, 1);
795 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
797 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);