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 1.2 2003/06/17 04:28:54 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 <opencrypto/cryptodev.h>
52 #include <opencrypto/xform.h>
55 TAILQ_ENTRY(csession) next;
60 struct enc_xform *txform;
62 struct auth_hash *thash;
66 u_char tmp_iv[EALG_MAX_BLOCK_LEN];
70 u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
72 struct iovec iovec[UIO_MAXIOV];
78 TAILQ_HEAD(csessionlist, csession) csessions;
82 static int cryptof_rw(struct file *fp, struct uio *uio,
83 struct ucred *cred, int flags, struct proc *);
84 static int cryptof_ioctl(struct file *, u_long, caddr_t, struct proc *);
85 static int cryptof_poll(struct file *, int, struct ucred *, struct proc *);
86 static int cryptof_kqfilter(struct file *, struct knote *);
87 static int cryptof_stat(struct file *, struct stat *, struct proc *);
88 static int cryptof_close(struct file *, struct proc *);
90 static struct fileops cryptofops = {
100 static struct csession *csefind(struct fcrypt *, u_int);
101 static int csedelete(struct fcrypt *, struct csession *);
102 static struct csession *cseadd(struct fcrypt *, struct csession *);
103 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
104 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
106 static int csefree(struct csession *);
108 static int cryptodev_op(struct csession *, struct crypt_op *,
110 static int cryptodev_key(struct crypt_kop *);
116 struct ucred *active_cred,
132 struct cryptoini cria, crie;
133 struct fcrypt *fcr = (struct fcrypt *)fp->f_data;
134 struct csession *cse;
135 struct session_op *sop;
136 struct crypt_op *cop;
137 struct enc_xform *txform = NULL;
138 struct auth_hash *thash = NULL;
145 sop = (struct session_op *)data;
146 switch (sop->cipher) {
150 txform = &enc_xform_des;
152 case CRYPTO_3DES_CBC:
153 txform = &enc_xform_3des;
156 txform = &enc_xform_blf;
158 case CRYPTO_CAST_CBC:
159 txform = &enc_xform_cast5;
161 case CRYPTO_SKIPJACK_CBC:
162 txform = &enc_xform_skipjack;
165 txform = &enc_xform_rijndael128;
167 case CRYPTO_NULL_CBC:
168 txform = &enc_xform_null;
171 txform = &enc_xform_arc4;
180 case CRYPTO_MD5_HMAC:
181 thash = &auth_hash_hmac_md5_96;
183 case CRYPTO_SHA1_HMAC:
184 thash = &auth_hash_hmac_sha1_96;
186 case CRYPTO_SHA2_HMAC:
187 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
188 thash = &auth_hash_hmac_sha2_256;
189 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
190 thash = &auth_hash_hmac_sha2_384;
191 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
192 thash = &auth_hash_hmac_sha2_512;
196 case CRYPTO_RIPEMD160_HMAC:
197 thash = &auth_hash_hmac_ripemd_160_96;
201 thash = &auth_hash_md5;
204 thash = &auth_hash_sha1;
207 case CRYPTO_NULL_HMAC:
208 thash = &auth_hash_null;
214 bzero(&crie, sizeof(crie));
215 bzero(&cria, sizeof(cria));
218 crie.cri_alg = txform->type;
219 crie.cri_klen = sop->keylen * 8;
220 if (sop->keylen > txform->maxkey ||
221 sop->keylen < txform->minkey) {
226 MALLOC(crie.cri_key, u_int8_t *,
227 crie.cri_klen / 8, M_XDATA, M_WAITOK);
228 if ((error = copyin(sop->key, crie.cri_key,
232 crie.cri_next = &cria;
236 cria.cri_alg = thash->type;
237 cria.cri_klen = sop->mackeylen * 8;
238 if (sop->mackeylen != thash->keysize) {
244 MALLOC(cria.cri_key, u_int8_t *,
245 cria.cri_klen / 8, M_XDATA, M_WAITOK);
246 if ((error = copyin(sop->mackey, cria.cri_key,
252 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1);
256 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
257 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
261 crypto_freesession(sid);
270 FREE(crie.cri_key, M_XDATA);
272 FREE(cria.cri_key, M_XDATA);
276 ses = *(u_int32_t *)data;
277 cse = csefind(fcr, ses);
281 error = csefree(cse);
284 cop = (struct crypt_op *)data;
285 cse = csefind(fcr, cop->ses);
288 error = cryptodev_op(cse, cop, p);
291 error = cryptodev_key((struct crypt_kop *)data);
294 error = crypto_getfeat((int *)data);
302 static int cryptodev_cb(void *);
307 struct csession *cse,
308 struct crypt_op *cop,
311 struct cryptop *crp = NULL;
312 struct cryptodesc *crde = NULL, *crda = NULL;
315 if (cop->len > 256*1024-4)
318 if (cse->txform && (cop->len % cse->txform->blocksize) != 0)
321 bzero(&cse->uio, sizeof(cse->uio));
322 cse->uio.uio_iovcnt = 1;
323 cse->uio.uio_resid = 0;
324 cse->uio.uio_segflg = UIO_SYSSPACE;
325 cse->uio.uio_rw = UIO_WRITE;
326 cse->uio.uio_procp = p;
327 cse->uio.uio_iov = cse->iovec;
328 bzero(&cse->iovec, sizeof(cse->iovec));
329 cse->uio.uio_iov[0].iov_len = cop->len;
330 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
331 for (i = 0; i < cse->uio.uio_iovcnt; i++)
332 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len;
334 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
341 crda = crp->crp_desc;
343 crde = crda->crd_next;
346 crde = crp->crp_desc;
353 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
358 crda->crd_len = cop->len;
359 crda->crd_inject = 0; /* ??? */
361 crda->crd_alg = cse->mac;
362 crda->crd_key = cse->mackey;
363 crda->crd_klen = cse->mackeylen * 8;
367 if (cop->op == COP_ENCRYPT)
368 crde->crd_flags |= CRD_F_ENCRYPT;
370 crde->crd_flags &= ~CRD_F_ENCRYPT;
371 crde->crd_len = cop->len;
372 crde->crd_inject = 0;
374 crde->crd_alg = cse->cipher;
375 crde->crd_key = cse->key;
376 crde->crd_klen = cse->keylen * 8;
379 crp->crp_ilen = cop->len;
380 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
381 | (cop->flags & COP_F_BATCH);
382 crp->crp_buf = (caddr_t)&cse->uio;
383 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
384 crp->crp_sid = cse->sid;
385 crp->crp_opaque = (void *)cse;
392 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
396 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
398 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
399 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
401 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
404 crde->crd_flags |= CRD_F_IV_PRESENT;
405 crde->crd_skip = cse->txform->blocksize;
406 crde->crd_len -= cse->txform->blocksize;
414 crp->crp_mac=cse->tmp_mac;
417 s = splcrypto(); /* NB: only needed with CRYPTO_F_CBIMM */
418 error = crypto_dispatch(crp);
419 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
420 error = tsleep(crp, PSOCK, "crydev", 0);
425 if (crp->crp_etype != 0) {
426 error = crp->crp_etype;
436 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
440 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
446 if (cse->uio.uio_iov[0].iov_base)
447 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
453 cryptodev_cb(void *op)
455 struct cryptop *crp = (struct cryptop *) op;
456 struct csession *cse = (struct csession *)crp->crp_opaque;
458 cse->error = crp->crp_etype;
459 if (crp->crp_etype == EAGAIN)
460 return crypto_dispatch(crp);
466 cryptodevkey_cb(void *op)
468 struct cryptkop *krp = (struct cryptkop *) op;
475 cryptodev_key(struct crypt_kop *kop)
477 struct cryptkop *krp = NULL;
479 int in, out, size, i;
481 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
485 in = kop->crk_iparams;
486 out = kop->crk_oparams;
487 switch (kop->crk_op) {
489 if (in == 3 && out == 1)
492 case CRK_MOD_EXP_CRT:
493 if (in == 6 && out == 1)
497 if (in == 5 && out == 2)
501 if (in == 7 && out == 0)
504 case CRK_DH_COMPUTE_KEY:
505 if (in == 3 && out == 1)
512 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK);
515 bzero(krp, sizeof *krp);
516 krp->krp_op = kop->crk_op;
517 krp->krp_status = kop->crk_status;
518 krp->krp_iparams = kop->crk_iparams;
519 krp->krp_oparams = kop->crk_oparams;
521 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
523 for (i = 0; i < CRK_MAXPARAM; i++)
524 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
525 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
526 size = (krp->krp_param[i].crp_nbits + 7) / 8;
529 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK);
530 if (i >= krp->krp_iparams)
532 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
537 error = crypto_kdispatch(krp);
539 error = tsleep(krp, PSOCK, "crydev", 0);
543 if (krp->krp_status != 0) {
544 error = krp->krp_status;
548 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
549 size = (krp->krp_param[i].crp_nbits + 7) / 8;
552 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
559 kop->crk_status = krp->krp_status;
560 for (i = 0; i < CRK_MAXPARAM; i++) {
561 if (krp->krp_param[i].crp_p)
562 FREE(krp->krp_param[i].crp_p, M_XDATA);
574 struct ucred *active_cred,
583 cryptof_kqfilter(struct file *fp, struct knote *kn)
602 cryptof_close(struct file *fp, struct proc *p)
604 struct fcrypt *fcr = (struct fcrypt *)fp->f_data;
605 struct csession *cse;
607 while ((cse = TAILQ_FIRST(&fcr->csessions))) {
608 TAILQ_REMOVE(&fcr->csessions, cse, next);
616 static struct csession *
617 csefind(struct fcrypt *fcr, u_int ses)
619 struct csession *cse;
621 TAILQ_FOREACH(cse, &fcr->csessions, next)
628 csedelete(struct fcrypt *fcr, struct csession *cse_del)
630 struct csession *cse;
632 TAILQ_FOREACH(cse, &fcr->csessions, next) {
633 if (cse == cse_del) {
634 TAILQ_REMOVE(&fcr->csessions, cse, next);
641 static struct csession *
642 cseadd(struct fcrypt *fcr, struct csession *cse)
644 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
645 cse->ses = fcr->sesn++;
650 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
651 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
652 struct enc_xform *txform, struct auth_hash *thash)
654 struct csession *cse;
656 MALLOC(cse, struct csession *, sizeof(struct csession),
661 cse->keylen = keylen/8;
662 cse->mackey = mackey;
663 cse->mackeylen = mackeylen/8;
665 cse->cipher = cipher;
667 cse->txform = txform;
674 csefree(struct csession *cse)
678 error = crypto_freesession(cse->sid);
680 FREE(cse->key, M_XDATA);
682 FREE(cse->mackey, M_XDATA);
688 cryptoopen(dev_t dev, int oflags, int devtype, struct proc *p)
690 if (crypto_usercrypto == 0)
696 cryptoread(dev_t dev, struct uio *uio, int ioflag)
702 cryptowrite(dev_t dev, struct uio *uio, int ioflag)
708 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
715 MALLOC(fcr, struct fcrypt *,
716 sizeof(struct fcrypt), M_XDATA, M_WAITOK);
717 TAILQ_INIT(&fcr->csessions);
720 error = falloc(p, &f, &fd);
727 f->f_flag = FREAD | FWRITE;
728 f->f_type = DTYPE_CRYPTO;
729 f->f_ops = &cryptofops;
730 f->f_data = (caddr_t) fcr;
731 *(u_int32_t *)data = fd;
741 #define CRYPTO_MAJOR 70 /* from openbsd */
742 static struct cdevsw crypto_cdevsw = {
743 /* open */ cryptoopen,
744 /* close */ nullclose,
745 /* read */ cryptoread,
746 /* write */ cryptowrite,
747 /* ioctl */ cryptoioctl,
750 /* strategy */ nostrategy,
751 /* dev name */ "crypto",
752 /* dev major */ CRYPTO_MAJOR,
758 static dev_t crypto_dev;
761 * Initialization code, both for static and dynamic loading.
764 cryptodev_modevent(module_t mod, int type, void *unused)
769 printf("crypto: <crypto device>\n");
770 crypto_dev = make_dev(&crypto_cdevsw, 0,
771 UID_ROOT, GID_WHEEL, 0666,
775 /*XXX disallow if active sessions */
776 destroy_dev(crypto_dev);
782 static moduledata_t cryptodev_mod = {
787 MODULE_VERSION(cryptodev, 1);
788 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
790 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);