1 /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.4 2003/06/03 00:09:02 sam Exp $ */
2 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
5 * Copyright (c) 2001 Theo de Raadt
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 * Effort sponsored in part by the Defense Advanced Research Projects
31 * Agency (DARPA) and Air Force Research Laboratory, Air Force
32 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/malloc.h>
40 #include <sys/sysctl.h>
42 #include <sys/filedesc.h>
43 #include <sys/errno.h>
45 #include <sys/random.h>
47 #include <sys/kernel.h>
48 #include <sys/fcntl.h>
50 #include <opencrypto/cryptodev.h>
51 #include <opencrypto/xform.h>
54 TAILQ_ENTRY(csession) next;
59 struct enc_xform *txform;
61 struct auth_hash *thash;
65 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
69 u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
71 struct iovec iovec[UIO_MAXIOV];
77 TAILQ_HEAD(csessionlist, csession) csessions;
81 static int cryptof_rw(struct file *fp, struct uio *uio,
82 struct ucred *cred, int flags, struct proc *);
83 static int cryptof_ioctl(struct file *, u_long, caddr_t, struct proc *);
84 static int cryptof_poll(struct file *, int, struct ucred *, struct proc *);
85 static int cryptof_kqfilter(struct file *, struct knote *);
86 static int cryptof_stat(struct file *, struct stat *, struct proc *);
87 static int cryptof_close(struct file *, struct proc *);
89 static struct fileops cryptofops = {
99 static struct csession *csefind(struct fcrypt *, u_int);
100 static int csedelete(struct fcrypt *, struct csession *);
101 static struct csession *cseadd(struct fcrypt *, struct csession *);
102 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
103 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
105 static int csefree(struct csession *);
107 static int cryptodev_op(struct csession *, struct crypt_op *,
109 static int cryptodev_key(struct crypt_kop *);
115 struct ucred *active_cred,
131 struct cryptoini cria, crie;
132 struct fcrypt *fcr = (struct fcrypt *)fp->f_data;
133 struct csession *cse;
134 struct session_op *sop;
135 struct crypt_op *cop;
136 struct enc_xform *txform = NULL;
137 struct auth_hash *thash = NULL;
144 sop = (struct session_op *)data;
145 switch (sop->cipher) {
149 txform = &enc_xform_des;
151 case CRYPTO_3DES_CBC:
152 txform = &enc_xform_3des;
155 txform = &enc_xform_blf;
157 case CRYPTO_CAST_CBC:
158 txform = &enc_xform_cast5;
160 case CRYPTO_SKIPJACK_CBC:
161 txform = &enc_xform_skipjack;
164 txform = &enc_xform_rijndael128;
166 case CRYPTO_NULL_CBC:
167 txform = &enc_xform_null;
170 txform = &enc_xform_arc4;
179 case CRYPTO_MD5_HMAC:
180 thash = &auth_hash_hmac_md5_96;
182 case CRYPTO_SHA1_HMAC:
183 thash = &auth_hash_hmac_sha1_96;
185 case CRYPTO_SHA2_HMAC:
186 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
187 thash = &auth_hash_hmac_sha2_256;
188 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
189 thash = &auth_hash_hmac_sha2_384;
190 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
191 thash = &auth_hash_hmac_sha2_512;
195 case CRYPTO_RIPEMD160_HMAC:
196 thash = &auth_hash_hmac_ripemd_160_96;
200 thash = &auth_hash_md5;
203 thash = &auth_hash_sha1;
206 case CRYPTO_NULL_HMAC:
207 thash = &auth_hash_null;
213 bzero(&crie, sizeof(crie));
214 bzero(&cria, sizeof(cria));
217 crie.cri_alg = txform->type;
218 crie.cri_klen = sop->keylen * 8;
219 if (sop->keylen > txform->maxkey ||
220 sop->keylen < txform->minkey) {
225 MALLOC(crie.cri_key, u_int8_t *,
226 crie.cri_klen / 8, M_XDATA, M_WAITOK);
227 if ((error = copyin(sop->key, crie.cri_key,
231 crie.cri_next = &cria;
235 cria.cri_alg = thash->type;
236 cria.cri_klen = sop->mackeylen * 8;
237 if (sop->mackeylen != thash->keysize) {
243 MALLOC(cria.cri_key, u_int8_t *,
244 cria.cri_klen / 8, M_XDATA, M_WAITOK);
245 if ((error = copyin(sop->mackey, cria.cri_key,
251 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1);
255 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
256 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
260 crypto_freesession(sid);
269 FREE(crie.cri_key, M_XDATA);
271 FREE(cria.cri_key, M_XDATA);
275 ses = *(u_int32_t *)data;
276 cse = csefind(fcr, ses);
280 error = csefree(cse);
283 cop = (struct crypt_op *)data;
284 cse = csefind(fcr, cop->ses);
287 error = cryptodev_op(cse, cop, p);
290 error = cryptodev_key((struct crypt_kop *)data);
293 error = crypto_getfeat((int *)data);
301 static int cryptodev_cb(void *);
306 struct csession *cse,
307 struct crypt_op *cop,
310 struct cryptop *crp = NULL;
311 struct cryptodesc *crde = NULL, *crda = NULL;
314 if (cop->len > 256*1024-4)
317 if (cse->txform && (cop->len % cse->txform->blocksize) != 0)
320 bzero(&cse->uio, sizeof(cse->uio));
321 cse->uio.uio_iovcnt = 1;
322 cse->uio.uio_resid = 0;
323 cse->uio.uio_segflg = UIO_SYSSPACE;
324 cse->uio.uio_rw = UIO_WRITE;
325 cse->uio.uio_procp = p;
326 cse->uio.uio_iov = cse->iovec;
327 bzero(&cse->iovec, sizeof(cse->iovec));
328 cse->uio.uio_iov[0].iov_len = cop->len;
329 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
330 for (i = 0; i < cse->uio.uio_iovcnt; i++)
331 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len;
333 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
340 crda = crp->crp_desc;
342 crde = crda->crd_next;
345 crde = crp->crp_desc;
352 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
357 crda->crd_len = cop->len;
358 crda->crd_inject = 0; /* ??? */
360 crda->crd_alg = cse->mac;
361 crda->crd_key = cse->mackey;
362 crda->crd_klen = cse->mackeylen * 8;
366 if (cop->op == COP_ENCRYPT)
367 crde->crd_flags |= CRD_F_ENCRYPT;
369 crde->crd_flags &= ~CRD_F_ENCRYPT;
370 crde->crd_len = cop->len;
371 crde->crd_inject = 0;
373 crde->crd_alg = cse->cipher;
374 crde->crd_key = cse->key;
375 crde->crd_klen = cse->keylen * 8;
378 crp->crp_ilen = cop->len;
379 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
380 | (cop->flags & COP_F_BATCH);
381 crp->crp_buf = (caddr_t)&cse->uio;
382 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
383 crp->crp_sid = cse->sid;
384 crp->crp_opaque = (void *)cse;
391 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
395 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
397 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
398 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
400 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
403 crde->crd_flags |= CRD_F_IV_PRESENT;
404 crde->crd_skip = cse->txform->blocksize;
405 crde->crd_len -= cse->txform->blocksize;
413 crp->crp_mac=cse->tmp_mac;
416 s = splcrypto(); /* NB: only needed with CRYPTO_F_CBIMM */
417 error = crypto_dispatch(crp);
418 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
419 error = tsleep(crp, PSOCK, "crydev", 0);
424 if (crp->crp_etype != 0) {
425 error = crp->crp_etype;
435 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
439 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
445 if (cse->uio.uio_iov[0].iov_base)
446 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
452 cryptodev_cb(void *op)
454 struct cryptop *crp = (struct cryptop *) op;
455 struct csession *cse = (struct csession *)crp->crp_opaque;
457 cse->error = crp->crp_etype;
458 if (crp->crp_etype == EAGAIN)
459 return crypto_dispatch(crp);
465 cryptodevkey_cb(void *op)
467 struct cryptkop *krp = (struct cryptkop *) op;
474 cryptodev_key(struct crypt_kop *kop)
476 struct cryptkop *krp = NULL;
478 int in, out, size, i;
480 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
484 in = kop->crk_iparams;
485 out = kop->crk_oparams;
486 switch (kop->crk_op) {
488 if (in == 3 && out == 1)
491 case CRK_MOD_EXP_CRT:
492 if (in == 6 && out == 1)
496 if (in == 5 && out == 2)
500 if (in == 7 && out == 0)
503 case CRK_DH_COMPUTE_KEY:
504 if (in == 3 && out == 1)
511 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK);
514 bzero(krp, sizeof *krp);
515 krp->krp_op = kop->crk_op;
516 krp->krp_status = kop->crk_status;
517 krp->krp_iparams = kop->crk_iparams;
518 krp->krp_oparams = kop->crk_oparams;
520 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
522 for (i = 0; i < CRK_MAXPARAM; i++)
523 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
524 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
525 size = (krp->krp_param[i].crp_nbits + 7) / 8;
528 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK);
529 if (i >= krp->krp_iparams)
531 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
536 error = crypto_kdispatch(krp);
538 error = tsleep(krp, PSOCK, "crydev", 0);
542 if (krp->krp_status != 0) {
543 error = krp->krp_status;
547 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
548 size = (krp->krp_param[i].crp_nbits + 7) / 8;
551 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
558 kop->crk_status = krp->krp_status;
559 for (i = 0; i < CRK_MAXPARAM; i++) {
560 if (krp->krp_param[i].crp_p)
561 FREE(krp->krp_param[i].crp_p, M_XDATA);
573 struct ucred *active_cred,
582 cryptof_kqfilter(struct file *fp, struct knote *kn)
601 cryptof_close(struct file *fp, struct proc *p)
603 struct fcrypt *fcr = (struct fcrypt *)fp->f_data;
604 struct csession *cse;
606 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
607 TAILQ_REMOVE(&fcr->csessions, cse, next);
615 static struct csession *
616 csefind(struct fcrypt *fcr, u_int ses)
618 struct csession *cse;
620 TAILQ_FOREACH(cse, &fcr->csessions, next)
627 csedelete(struct fcrypt *fcr, struct csession *cse_del)
629 struct csession *cse;
631 TAILQ_FOREACH(cse, &fcr->csessions, next) {
632 if (cse == cse_del) {
633 TAILQ_REMOVE(&fcr->csessions, cse, next);
640 static struct csession *
641 cseadd(struct fcrypt *fcr, struct csession *cse)
643 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
644 cse->ses = fcr->sesn++;
649 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
650 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
651 struct enc_xform *txform, struct auth_hash *thash)
653 struct csession *cse;
655 MALLOC(cse, struct csession *, sizeof(struct csession),
660 cse->keylen = keylen/8;
661 cse->mackey = mackey;
662 cse->mackeylen = mackeylen/8;
664 cse->cipher = cipher;
666 cse->txform = txform;
673 csefree(struct csession *cse)
677 error = crypto_freesession(cse->sid);
679 FREE(cse->key, M_XDATA);
681 FREE(cse->mackey, M_XDATA);
687 cryptoopen(dev_t dev, int oflags, int devtype, struct proc *p)
689 if (crypto_usercrypto == 0)
695 cryptoread(dev_t dev, struct uio *uio, int ioflag)
701 cryptowrite(dev_t dev, struct uio *uio, int ioflag)
707 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
714 MALLOC(fcr, struct fcrypt *,
715 sizeof(struct fcrypt), M_XDATA, M_WAITOK);
716 TAILQ_INIT(&fcr->csessions);
719 error = falloc(p, &f, &fd);
726 f->f_flag = FREAD | FWRITE;
727 f->f_type = DTYPE_CRYPTO;
728 f->f_ops = &cryptofops;
729 f->f_data = (caddr_t) fcr;
730 *(u_int32_t *)data = fd;
740 #define CRYPTO_MAJOR 70 /* from openbsd */
741 static struct cdevsw crypto_cdevsw = {
742 /* open */ cryptoopen,
743 /* close */ nullclose,
744 /* read */ cryptoread,
745 /* write */ cryptowrite,
746 /* ioctl */ cryptoioctl,
749 /* strategy */ nostrategy,
750 /* dev name */ "crypto",
751 /* dev major */ CRYPTO_MAJOR,
757 static dev_t crypto_dev;
760 * Initialization code, both for static and dynamic loading.
763 cryptodev_modevent(module_t mod, int type, void *unused)
768 printf("crypto: <crypto device>\n");
769 crypto_dev = make_dev(&crypto_cdevsw, 0,
770 UID_ROOT, GID_WHEEL, 0666,
774 /*XXX disallow if active sessions */
775 destroy_dev(crypto_dev);
781 static moduledata_t cryptodev_mod = {
786 MODULE_VERSION(cryptodev, 1);
787 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
789 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);