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 1.12 2005/09/02 07:16:58 hsu 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 = {
106 static struct csession *csefind(struct fcrypt *, u_int);
107 static int csedelete(struct fcrypt *, struct csession *);
108 static struct csession *cseadd(struct fcrypt *, struct csession *);
109 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
110 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
112 static int csefree(struct csession *);
114 static int cryptodev_op(struct csession *, struct crypt_op *,
116 static int cryptodev_key(struct crypt_kop *);
122 struct ucred *active_cred,
138 struct cryptoini cria, crie;
139 struct fcrypt *fcr = (struct fcrypt *)fp->f_data;
140 struct csession *cse;
141 struct session_op *sop;
142 struct crypt_op *cop;
143 struct enc_xform *txform = NULL;
144 struct auth_hash *thash = NULL;
151 sop = (struct session_op *)data;
152 switch (sop->cipher) {
156 txform = &enc_xform_des;
158 case CRYPTO_3DES_CBC:
159 txform = &enc_xform_3des;
162 txform = &enc_xform_blf;
164 case CRYPTO_CAST_CBC:
165 txform = &enc_xform_cast5;
167 case CRYPTO_SKIPJACK_CBC:
168 txform = &enc_xform_skipjack;
171 txform = &enc_xform_rijndael128;
173 case CRYPTO_NULL_CBC:
174 txform = &enc_xform_null;
177 txform = &enc_xform_arc4;
186 case CRYPTO_MD5_HMAC:
187 thash = &auth_hash_hmac_md5_96;
189 case CRYPTO_SHA1_HMAC:
190 thash = &auth_hash_hmac_sha1_96;
192 case CRYPTO_SHA2_HMAC:
193 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
194 thash = &auth_hash_hmac_sha2_256;
195 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
196 thash = &auth_hash_hmac_sha2_384;
197 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
198 thash = &auth_hash_hmac_sha2_512;
202 case CRYPTO_RIPEMD160_HMAC:
203 thash = &auth_hash_hmac_ripemd_160_96;
207 thash = &auth_hash_md5;
210 thash = &auth_hash_sha1;
213 case CRYPTO_NULL_HMAC:
214 thash = &auth_hash_null;
220 bzero(&crie, sizeof(crie));
221 bzero(&cria, sizeof(cria));
224 crie.cri_alg = txform->type;
225 crie.cri_klen = sop->keylen * 8;
226 if (sop->keylen > txform->maxkey ||
227 sop->keylen < txform->minkey) {
232 MALLOC(crie.cri_key, u_int8_t *,
233 crie.cri_klen / 8, M_XDATA, M_WAITOK);
234 if ((error = copyin(sop->key, crie.cri_key,
238 crie.cri_next = &cria;
242 cria.cri_alg = thash->type;
243 cria.cri_klen = sop->mackeylen * 8;
244 if (sop->mackeylen != thash->keysize) {
250 MALLOC(cria.cri_key, u_int8_t *,
251 cria.cri_klen / 8, M_XDATA, M_WAITOK);
252 if ((error = copyin(sop->mackey, cria.cri_key,
258 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1);
262 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
263 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
267 crypto_freesession(sid);
276 FREE(crie.cri_key, M_XDATA);
278 FREE(cria.cri_key, M_XDATA);
282 ses = *(u_int32_t *)data;
283 cse = csefind(fcr, ses);
287 error = csefree(cse);
290 cop = (struct crypt_op *)data;
291 cse = csefind(fcr, cop->ses);
294 error = cryptodev_op(cse, cop, td);
297 error = cryptodev_key((struct crypt_kop *)data);
300 error = crypto_getfeat((int *)data);
308 static int cryptodev_cb(void *);
313 struct csession *cse,
314 struct crypt_op *cop,
317 struct cryptop *crp = NULL;
318 struct cryptodesc *crde = NULL, *crda = NULL;
321 if (cop->len > 256*1024-4)
324 if (cse->txform && (cop->len % cse->txform->blocksize) != 0)
327 bzero(&cse->uio, sizeof(cse->uio));
328 cse->uio.uio_iovcnt = 1;
329 cse->uio.uio_resid = 0;
330 cse->uio.uio_segflg = UIO_SYSSPACE;
331 cse->uio.uio_rw = UIO_WRITE;
332 cse->uio.uio_td = td;
333 cse->uio.uio_iov = cse->iovec;
334 bzero(&cse->iovec, sizeof(cse->iovec));
335 cse->uio.uio_iov[0].iov_len = cop->len;
336 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
337 for (i = 0; i < cse->uio.uio_iovcnt; i++)
338 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len;
340 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
347 crda = crp->crp_desc;
349 crde = crda->crd_next;
352 crde = crp->crp_desc;
359 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
364 crda->crd_len = cop->len;
365 crda->crd_inject = 0; /* ??? */
367 crda->crd_alg = cse->mac;
368 crda->crd_key = cse->mackey;
369 crda->crd_klen = cse->mackeylen * 8;
373 if (cop->op == COP_ENCRYPT)
374 crde->crd_flags |= CRD_F_ENCRYPT;
376 crde->crd_flags &= ~CRD_F_ENCRYPT;
377 crde->crd_len = cop->len;
378 crde->crd_inject = 0;
380 crde->crd_alg = cse->cipher;
381 crde->crd_key = cse->key;
382 crde->crd_klen = cse->keylen * 8;
385 crp->crp_ilen = cop->len;
386 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
387 | (cop->flags & COP_F_BATCH);
388 crp->crp_buf = (caddr_t)&cse->uio;
389 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
390 crp->crp_sid = cse->sid;
391 crp->crp_opaque = (void *)cse;
398 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
402 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
404 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
405 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
407 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
410 crde->crd_flags |= CRD_F_IV_PRESENT;
411 crde->crd_skip = cse->txform->blocksize;
412 crde->crd_len -= cse->txform->blocksize;
420 crp->crp_mac=cse->tmp_mac;
424 error = crypto_dispatch(crp);
425 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
426 error = tsleep(crp, 0, "crydev", 0);
431 if (crp->crp_etype != 0) {
432 error = crp->crp_etype;
442 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
446 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
452 if (cse->uio.uio_iov[0].iov_base)
453 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
459 cryptodev_cb(void *op)
461 struct cryptop *crp = (struct cryptop *) op;
462 struct csession *cse = (struct csession *)crp->crp_opaque;
464 cse->error = crp->crp_etype;
465 if (crp->crp_etype == EAGAIN)
466 return crypto_dispatch(crp);
472 cryptodevkey_cb(void *op)
474 struct cryptkop *krp = (struct cryptkop *) op;
481 cryptodev_key(struct crypt_kop *kop)
483 struct cryptkop *krp = NULL;
485 int in, out, size, i;
487 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
491 in = kop->crk_iparams;
492 out = kop->crk_oparams;
493 switch (kop->crk_op) {
495 if (in == 3 && out == 1)
498 case CRK_MOD_EXP_CRT:
499 if (in == 6 && out == 1)
503 if (in == 5 && out == 2)
507 if (in == 7 && out == 0)
510 case CRK_DH_COMPUTE_KEY:
511 if (in == 3 && out == 1)
518 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK);
521 bzero(krp, sizeof *krp);
522 krp->krp_op = kop->crk_op;
523 krp->krp_status = kop->crk_status;
524 krp->krp_iparams = kop->crk_iparams;
525 krp->krp_oparams = kop->crk_oparams;
527 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
529 for (i = 0; i < CRK_MAXPARAM; i++)
530 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
531 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
532 size = (krp->krp_param[i].crp_nbits + 7) / 8;
535 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK);
536 if (i >= krp->krp_iparams)
538 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
543 error = crypto_kdispatch(krp);
545 error = tsleep(krp, 0, "crydev", 0);
549 if (krp->krp_status != 0) {
550 error = krp->krp_status;
554 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
555 size = (krp->krp_param[i].crp_nbits + 7) / 8;
558 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
565 kop->crk_status = krp->krp_status;
566 for (i = 0; i < CRK_MAXPARAM; i++) {
567 if (krp->krp_param[i].crp_p)
568 FREE(krp->krp_param[i].crp_p, M_XDATA);
580 struct ucred *active_cred,
589 cryptof_kqfilter(struct file *fp, struct knote *kn)
608 cryptof_close(struct file *fp, struct thread *td)
610 struct fcrypt *fcr = (struct fcrypt *)fp->f_data;
611 struct csession *cse;
613 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
614 TAILQ_REMOVE(&fcr->csessions, cse, next);
622 static struct csession *
623 csefind(struct fcrypt *fcr, u_int ses)
625 struct csession *cse;
627 TAILQ_FOREACH(cse, &fcr->csessions, next)
634 csedelete(struct fcrypt *fcr, struct csession *cse_del)
636 struct csession *cse;
638 TAILQ_FOREACH(cse, &fcr->csessions, next) {
639 if (cse == cse_del) {
640 TAILQ_REMOVE(&fcr->csessions, cse, next);
647 static struct csession *
648 cseadd(struct fcrypt *fcr, struct csession *cse)
650 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
651 cse->ses = fcr->sesn++;
656 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
657 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
658 struct enc_xform *txform, struct auth_hash *thash)
660 struct csession *cse;
662 MALLOC(cse, struct csession *, sizeof(struct csession),
667 cse->keylen = keylen/8;
668 cse->mackey = mackey;
669 cse->mackeylen = mackeylen/8;
671 cse->cipher = cipher;
673 cse->txform = txform;
680 csefree(struct csession *cse)
684 error = crypto_freesession(cse->sid);
686 FREE(cse->key, M_XDATA);
688 FREE(cse->mackey, M_XDATA);
694 cryptoopen(dev_t dev, int oflags, int devtype, struct thread *td)
696 if (crypto_usercrypto == 0)
702 cryptoread(dev_t dev, struct uio *uio, int ioflag)
708 cryptowrite(dev_t dev, struct uio *uio, int ioflag)
714 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
721 MALLOC(fcr, struct fcrypt *,
722 sizeof(struct fcrypt), M_XDATA, M_WAITOK);
723 TAILQ_INIT(&fcr->csessions);
726 KKASSERT(td->td_proc);
727 error = falloc(td->td_proc, &f, &fd);
733 f->f_type = DTYPE_CRYPTO;
734 f->f_flag = FREAD | FWRITE;
735 f->f_ops = &cryptofops;
737 *(u_int32_t *)data = fd;
747 #define CRYPTO_MAJOR 70 /* from openbsd */
748 static struct cdevsw crypto_cdevsw = {
749 /* dev name */ "crypto",
750 /* dev major */ CRYPTO_MAJOR,
755 /* open */ cryptoopen,
756 /* close */ nullclose,
757 /* read */ cryptoread,
758 /* write */ cryptowrite,
759 /* ioctl */ cryptoioctl,
762 /* strategy */ nostrategy,
769 * Initialization code, both for static and dynamic loading.
772 cryptodev_modevent(module_t mod, int type, void *unused)
777 printf("crypto: <crypto device>\n");
778 cdevsw_add(&crypto_cdevsw, 0, 0);
779 make_dev(&crypto_cdevsw, 0, UID_ROOT, GID_WHEEL,
783 /*XXX disallow if active sessions */
784 cdevsw_remove(&crypto_cdevsw, 0, 0);
790 static moduledata_t cryptodev_mod = {
795 MODULE_VERSION(cryptodev, 1);
796 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
798 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);