cryptodev.c revision 1.35 1 1.35 ad /* $NetBSD: cryptodev.c,v 1.35 2008/03/21 21:55:01 ad Exp $ */
2 1.4 jonathan /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.4 2003/06/03 00:09:02 sam Exp $ */
3 1.1 jonathan /* $OpenBSD: cryptodev.c,v 1.53 2002/07/10 22:21:30 mickey Exp $ */
4 1.1 jonathan
5 1.1 jonathan /*
6 1.1 jonathan * Copyright (c) 2001 Theo de Raadt
7 1.1 jonathan *
8 1.1 jonathan * Redistribution and use in source and binary forms, with or without
9 1.1 jonathan * modification, are permitted provided that the following conditions
10 1.1 jonathan * are met:
11 1.1 jonathan *
12 1.1 jonathan * 1. Redistributions of source code must retain the above copyright
13 1.1 jonathan * notice, this list of conditions and the following disclaimer.
14 1.1 jonathan * 2. Redistributions in binary form must reproduce the above copyright
15 1.1 jonathan * notice, this list of conditions and the following disclaimer in the
16 1.1 jonathan * documentation and/or other materials provided with the distribution.
17 1.1 jonathan * 3. The name of the author may not be used to endorse or promote products
18 1.1 jonathan * derived from this software without specific prior written permission.
19 1.1 jonathan *
20 1.1 jonathan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 1.1 jonathan * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 1.1 jonathan * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 1.1 jonathan * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 1.1 jonathan * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 1.1 jonathan * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 1.1 jonathan * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 1.1 jonathan * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 1.1 jonathan * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 1.1 jonathan * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 1.1 jonathan *
31 1.1 jonathan * Effort sponsored in part by the Defense Advanced Research Projects
32 1.1 jonathan * Agency (DARPA) and Air Force Research Laboratory, Air Force
33 1.1 jonathan * Materiel Command, USAF, under agreement number F30602-01-2-0537.
34 1.1 jonathan *
35 1.1 jonathan */
36 1.1 jonathan
37 1.1 jonathan #include <sys/cdefs.h>
38 1.35 ad __KERNEL_RCSID(0, "$NetBSD: cryptodev.c,v 1.35 2008/03/21 21:55:01 ad Exp $");
39 1.1 jonathan
40 1.1 jonathan #include <sys/param.h>
41 1.1 jonathan #include <sys/systm.h>
42 1.1 jonathan #include <sys/malloc.h>
43 1.1 jonathan #include <sys/mbuf.h>
44 1.29 tls #include <sys/pool.h>
45 1.1 jonathan #include <sys/sysctl.h>
46 1.1 jonathan #include <sys/file.h>
47 1.1 jonathan #include <sys/filedesc.h>
48 1.1 jonathan #include <sys/errno.h>
49 1.2 jonathan #include <sys/md5.h>
50 1.1 jonathan #include <sys/sha1.h>
51 1.1 jonathan #include <sys/conf.h>
52 1.1 jonathan #include <sys/device.h>
53 1.21 elad #include <sys/kauth.h>
54 1.1 jonathan
55 1.33 tls #include "opt_ocf.h"
56 1.1 jonathan #include <opencrypto/cryptodev.h>
57 1.1 jonathan #include <opencrypto/xform.h>
58 1.1 jonathan
59 1.1 jonathan struct csession {
60 1.1 jonathan TAILQ_ENTRY(csession) next;
61 1.1 jonathan u_int64_t sid;
62 1.1 jonathan u_int32_t ses;
63 1.1 jonathan
64 1.1 jonathan u_int32_t cipher;
65 1.1 jonathan struct enc_xform *txform;
66 1.1 jonathan u_int32_t mac;
67 1.1 jonathan struct auth_hash *thash;
68 1.1 jonathan
69 1.26 christos void * key;
70 1.1 jonathan int keylen;
71 1.1 jonathan u_char tmp_iv[EALG_MAX_BLOCK_LEN];
72 1.1 jonathan
73 1.26 christos void * mackey;
74 1.1 jonathan int mackeylen;
75 1.1 jonathan u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
76 1.1 jonathan
77 1.29 tls struct iovec iovec[1]; /* user requests never have more */
78 1.1 jonathan struct uio uio;
79 1.1 jonathan int error;
80 1.1 jonathan };
81 1.1 jonathan
82 1.1 jonathan struct fcrypt {
83 1.1 jonathan TAILQ_HEAD(csessionlist, csession) csessions;
84 1.1 jonathan int sesn;
85 1.1 jonathan };
86 1.1 jonathan
87 1.29 tls /* For our fixed-size allocations */
88 1.29 tls struct pool fcrpl;
89 1.29 tls struct pool csepl;
90 1.1 jonathan
91 1.1 jonathan /* Declaration of master device (fd-cloning/ctxt-allocating) entrypoints */
92 1.16 christos static int cryptoopen(dev_t dev, int flag, int mode, struct lwp *l);
93 1.1 jonathan static int cryptoread(dev_t dev, struct uio *uio, int ioflag);
94 1.1 jonathan static int cryptowrite(dev_t dev, struct uio *uio, int ioflag);
95 1.16 christos static int cryptoselect(dev_t dev, int rw, struct lwp *l);
96 1.1 jonathan
97 1.1 jonathan /* Declaration of cloned-device (per-ctxt) entrypoints */
98 1.35 ad static int cryptof_read(file_t *, off_t *, struct uio *, kauth_cred_t, int);
99 1.35 ad static int cryptof_write(file_t *, off_t *, struct uio *, kauth_cred_t, int);
100 1.35 ad static int cryptof_ioctl(file_t *, u_long, void *);
101 1.35 ad static int cryptof_close(file_t *);
102 1.1 jonathan
103 1.12 christos static const struct fileops cryptofops = {
104 1.1 jonathan cryptof_read,
105 1.1 jonathan cryptof_write,
106 1.1 jonathan cryptof_ioctl,
107 1.12 christos fnullop_fcntl,
108 1.12 christos fnullop_poll,
109 1.12 christos fbadop_stat,
110 1.1 jonathan cryptof_close,
111 1.12 christos fnullop_kqfilter
112 1.1 jonathan };
113 1.1 jonathan
114 1.1 jonathan static struct csession *csefind(struct fcrypt *, u_int);
115 1.1 jonathan static int csedelete(struct fcrypt *, struct csession *);
116 1.1 jonathan static struct csession *cseadd(struct fcrypt *, struct csession *);
117 1.26 christos static struct csession *csecreate(struct fcrypt *, u_int64_t, void *, u_int64_t,
118 1.26 christos void *, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
119 1.1 jonathan struct auth_hash *);
120 1.1 jonathan static int csefree(struct csession *);
121 1.1 jonathan
122 1.16 christos static int cryptodev_op(struct csession *, struct crypt_op *, struct lwp *);
123 1.1 jonathan static int cryptodev_key(struct crypt_kop *);
124 1.1 jonathan int cryptodev_dokey(struct crypt_kop *kop, struct crparam kvp[]);
125 1.1 jonathan
126 1.1 jonathan static int cryptodev_cb(void *);
127 1.1 jonathan static int cryptodevkey_cb(void *);
128 1.1 jonathan
129 1.9 jonathan /*
130 1.9 jonathan * sysctl-able control variables for /dev/crypto now defined in crypto.c:
131 1.9 jonathan * crypto_usercrypto, crypto_userasmcrypto, crypto_devallowsoft.
132 1.9 jonathan */
133 1.1 jonathan
134 1.1 jonathan /* ARGSUSED */
135 1.1 jonathan int
136 1.35 ad cryptof_read(file_t *fp, off_t *poff,
137 1.25 christos struct uio *uio, kauth_cred_t cred, int flags)
138 1.1 jonathan {
139 1.1 jonathan return (EIO);
140 1.1 jonathan }
141 1.1 jonathan
142 1.1 jonathan /* ARGSUSED */
143 1.1 jonathan int
144 1.35 ad cryptof_write(file_t *fp, off_t *poff,
145 1.25 christos struct uio *uio, kauth_cred_t cred, int flags)
146 1.1 jonathan {
147 1.1 jonathan return (EIO);
148 1.1 jonathan }
149 1.1 jonathan
150 1.1 jonathan /* ARGSUSED */
151 1.1 jonathan int
152 1.35 ad cryptof_ioctl(file_t *fp, u_long cmd, void *data)
153 1.1 jonathan {
154 1.1 jonathan struct cryptoini cria, crie;
155 1.35 ad struct fcrypt *fcr = fp->f_data;
156 1.1 jonathan struct csession *cse;
157 1.1 jonathan struct session_op *sop;
158 1.1 jonathan struct crypt_op *cop;
159 1.1 jonathan struct enc_xform *txform = NULL;
160 1.1 jonathan struct auth_hash *thash = NULL;
161 1.1 jonathan u_int64_t sid;
162 1.1 jonathan u_int32_t ses;
163 1.1 jonathan int error = 0;
164 1.1 jonathan
165 1.29 tls /* backwards compatibility */
166 1.35 ad file_t *criofp;
167 1.29 tls struct fcrypt *criofcr;
168 1.29 tls int criofd;
169 1.29 tls
170 1.29 tls switch (cmd) {
171 1.29 tls case CRIOGET: /* XXX deprecated, remove after 5.0 */
172 1.35 ad if ((error = fd_allocfile(&criofp, &criofd)) != 0)
173 1.29 tls return error;
174 1.29 tls criofcr = pool_get(&fcrpl, PR_WAITOK);
175 1.33 tls mutex_spin_enter(&crypto_mtx);
176 1.29 tls TAILQ_INIT(&criofcr->csessions);
177 1.29 tls /*
178 1.29 tls * Don't ever return session 0, to allow detection of
179 1.29 tls * failed creation attempts with multi-create ioctl.
180 1.29 tls */
181 1.29 tls criofcr->sesn = 1;
182 1.33 tls mutex_spin_exit(&crypto_mtx);
183 1.35 ad (void)fd_clone(criofp, criofd, (FREAD|FWRITE),
184 1.29 tls &cryptofops, criofcr);
185 1.29 tls *(u_int32_t *)data = criofd;
186 1.29 tls return error;
187 1.29 tls break;
188 1.1 jonathan case CIOCGSESSION:
189 1.1 jonathan sop = (struct session_op *)data;
190 1.1 jonathan switch (sop->cipher) {
191 1.1 jonathan case 0:
192 1.1 jonathan break;
193 1.1 jonathan case CRYPTO_DES_CBC:
194 1.1 jonathan txform = &enc_xform_des;
195 1.1 jonathan break;
196 1.1 jonathan case CRYPTO_3DES_CBC:
197 1.1 jonathan txform = &enc_xform_3des;
198 1.1 jonathan break;
199 1.1 jonathan case CRYPTO_BLF_CBC:
200 1.1 jonathan txform = &enc_xform_blf;
201 1.1 jonathan break;
202 1.1 jonathan case CRYPTO_CAST_CBC:
203 1.1 jonathan txform = &enc_xform_cast5;
204 1.1 jonathan break;
205 1.1 jonathan case CRYPTO_SKIPJACK_CBC:
206 1.1 jonathan txform = &enc_xform_skipjack;
207 1.1 jonathan break;
208 1.1 jonathan case CRYPTO_AES_CBC:
209 1.1 jonathan txform = &enc_xform_rijndael128;
210 1.1 jonathan break;
211 1.1 jonathan case CRYPTO_NULL_CBC:
212 1.1 jonathan txform = &enc_xform_null;
213 1.1 jonathan break;
214 1.1 jonathan case CRYPTO_ARC4:
215 1.1 jonathan txform = &enc_xform_arc4;
216 1.1 jonathan break;
217 1.1 jonathan default:
218 1.18 christos DPRINTF(("Invalid cipher %d\n", sop->cipher));
219 1.1 jonathan return (EINVAL);
220 1.1 jonathan }
221 1.1 jonathan
222 1.1 jonathan switch (sop->mac) {
223 1.1 jonathan case 0:
224 1.1 jonathan break;
225 1.1 jonathan case CRYPTO_MD5_HMAC:
226 1.32 tls thash = &auth_hash_hmac_md5;
227 1.32 tls break;
228 1.32 tls case CRYPTO_SHA1_HMAC:
229 1.32 tls thash = &auth_hash_hmac_sha1;
230 1.32 tls break;
231 1.32 tls case CRYPTO_MD5_HMAC_96:
232 1.1 jonathan thash = &auth_hash_hmac_md5_96;
233 1.1 jonathan break;
234 1.32 tls case CRYPTO_SHA1_HMAC_96:
235 1.1 jonathan thash = &auth_hash_hmac_sha1_96;
236 1.1 jonathan break;
237 1.1 jonathan case CRYPTO_SHA2_HMAC:
238 1.1 jonathan if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
239 1.1 jonathan thash = &auth_hash_hmac_sha2_256;
240 1.1 jonathan else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
241 1.1 jonathan thash = &auth_hash_hmac_sha2_384;
242 1.1 jonathan else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
243 1.1 jonathan thash = &auth_hash_hmac_sha2_512;
244 1.18 christos else {
245 1.18 christos DPRINTF(("Invalid mackeylen %d\n",
246 1.18 christos sop->mackeylen));
247 1.1 jonathan return (EINVAL);
248 1.18 christos }
249 1.1 jonathan break;
250 1.1 jonathan case CRYPTO_RIPEMD160_HMAC:
251 1.1 jonathan thash = &auth_hash_hmac_ripemd_160_96;
252 1.1 jonathan break;
253 1.1 jonathan case CRYPTO_MD5:
254 1.1 jonathan thash = &auth_hash_md5;
255 1.1 jonathan break;
256 1.1 jonathan case CRYPTO_SHA1:
257 1.1 jonathan thash = &auth_hash_sha1;
258 1.1 jonathan break;
259 1.1 jonathan case CRYPTO_NULL_HMAC:
260 1.1 jonathan thash = &auth_hash_null;
261 1.1 jonathan break;
262 1.1 jonathan default:
263 1.18 christos DPRINTF(("Invalid mac %d\n", sop->mac));
264 1.1 jonathan return (EINVAL);
265 1.1 jonathan }
266 1.1 jonathan
267 1.1 jonathan bzero(&crie, sizeof(crie));
268 1.1 jonathan bzero(&cria, sizeof(cria));
269 1.1 jonathan
270 1.1 jonathan if (txform) {
271 1.1 jonathan crie.cri_alg = txform->type;
272 1.1 jonathan crie.cri_klen = sop->keylen * 8;
273 1.1 jonathan if (sop->keylen > txform->maxkey ||
274 1.1 jonathan sop->keylen < txform->minkey) {
275 1.18 christos DPRINTF(("keylen %d not in [%d,%d]\n",
276 1.18 christos sop->keylen, txform->minkey,
277 1.18 christos txform->maxkey));
278 1.1 jonathan error = EINVAL;
279 1.1 jonathan goto bail;
280 1.1 jonathan }
281 1.1 jonathan
282 1.19 christos crie.cri_key = malloc(crie.cri_klen / 8, M_XDATA,
283 1.19 christos M_WAITOK);
284 1.1 jonathan if ((error = copyin(sop->key, crie.cri_key,
285 1.1 jonathan crie.cri_klen / 8)))
286 1.1 jonathan goto bail;
287 1.1 jonathan if (thash)
288 1.1 jonathan crie.cri_next = &cria;
289 1.1 jonathan }
290 1.1 jonathan
291 1.1 jonathan if (thash) {
292 1.1 jonathan cria.cri_alg = thash->type;
293 1.1 jonathan cria.cri_klen = sop->mackeylen * 8;
294 1.1 jonathan if (sop->mackeylen != thash->keysize) {
295 1.18 christos DPRINTF(("mackeylen %d != keysize %d\n",
296 1.18 christos sop->mackeylen, thash->keysize));
297 1.1 jonathan error = EINVAL;
298 1.1 jonathan goto bail;
299 1.1 jonathan }
300 1.1 jonathan
301 1.1 jonathan if (cria.cri_klen) {
302 1.19 christos cria.cri_key = malloc(cria.cri_klen / 8,
303 1.19 christos M_XDATA, M_WAITOK);
304 1.1 jonathan if ((error = copyin(sop->mackey, cria.cri_key,
305 1.1 jonathan cria.cri_klen / 8)))
306 1.1 jonathan goto bail;
307 1.1 jonathan }
308 1.1 jonathan }
309 1.33 tls /* crypto_newsession requires that we hold the mutex. */
310 1.33 tls mutex_spin_enter(&crypto_mtx);
311 1.1 jonathan error = crypto_newsession(&sid, (txform ? &crie : &cria),
312 1.30 tls crypto_devallowsoft);
313 1.34 tls if (!error) {
314 1.34 tls cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
315 1.34 tls cria.cri_key, cria.cri_klen, sop->cipher, sop->mac,
316 1.34 tls txform, thash);
317 1.34 tls if (cse != NULL) {
318 1.34 tls sop->ses = cse->ses;
319 1.34 tls } else {
320 1.34 tls DPRINTF(("csecreate failed\n"));
321 1.34 tls crypto_freesession(sid);
322 1.34 tls error = EINVAL;
323 1.34 tls }
324 1.34 tls } else {
325 1.18 christos DPRINTF(("SIOCSESSION violates kernel parameters %d\n",
326 1.18 christos error));
327 1.1 jonathan }
328 1.34 tls mutex_spin_exit(&crypto_mtx);
329 1.1 jonathan bail:
330 1.1 jonathan if (error) {
331 1.1 jonathan if (crie.cri_key)
332 1.1 jonathan FREE(crie.cri_key, M_XDATA);
333 1.1 jonathan if (cria.cri_key)
334 1.1 jonathan FREE(cria.cri_key, M_XDATA);
335 1.1 jonathan }
336 1.1 jonathan break;
337 1.1 jonathan case CIOCFSESSION:
338 1.33 tls mutex_spin_enter(&crypto_mtx);
339 1.1 jonathan ses = *(u_int32_t *)data;
340 1.1 jonathan cse = csefind(fcr, ses);
341 1.1 jonathan if (cse == NULL)
342 1.1 jonathan return (EINVAL);
343 1.1 jonathan csedelete(fcr, cse);
344 1.1 jonathan error = csefree(cse);
345 1.33 tls mutex_spin_exit(&crypto_mtx);
346 1.1 jonathan break;
347 1.1 jonathan case CIOCCRYPT:
348 1.33 tls mutex_spin_enter(&crypto_mtx);
349 1.1 jonathan cop = (struct crypt_op *)data;
350 1.1 jonathan cse = csefind(fcr, cop->ses);
351 1.33 tls mutex_spin_exit(&crypto_mtx);
352 1.18 christos if (cse == NULL) {
353 1.18 christos DPRINTF(("csefind failed\n"));
354 1.1 jonathan return (EINVAL);
355 1.18 christos }
356 1.35 ad error = cryptodev_op(cse, cop, curlwp);
357 1.34 tls DPRINTF(("cryptodev_op error = %d\n", error));
358 1.1 jonathan break;
359 1.1 jonathan case CIOCKEY:
360 1.1 jonathan error = cryptodev_key((struct crypt_kop *)data);
361 1.34 tls DPRINTF(("cryptodev_key error = %d\n", error));
362 1.1 jonathan break;
363 1.1 jonathan case CIOCASYMFEAT:
364 1.1 jonathan error = crypto_getfeat((int *)data);
365 1.1 jonathan break;
366 1.1 jonathan default:
367 1.18 christos DPRINTF(("invalid ioctl cmd %ld\n", cmd));
368 1.1 jonathan error = EINVAL;
369 1.1 jonathan }
370 1.1 jonathan return (error);
371 1.1 jonathan }
372 1.1 jonathan
373 1.1 jonathan static int
374 1.25 christos cryptodev_op(struct csession *cse, struct crypt_op *cop, struct lwp *l)
375 1.1 jonathan {
376 1.1 jonathan struct cryptop *crp = NULL;
377 1.1 jonathan struct cryptodesc *crde = NULL, *crda = NULL;
378 1.33 tls int error;
379 1.1 jonathan
380 1.1 jonathan if (cop->len > 256*1024-4)
381 1.1 jonathan return (E2BIG);
382 1.1 jonathan
383 1.13 jonathan if (cse->txform) {
384 1.13 jonathan if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
385 1.13 jonathan return (EINVAL);
386 1.13 jonathan }
387 1.1 jonathan
388 1.1 jonathan bzero(&cse->uio, sizeof(cse->uio));
389 1.1 jonathan cse->uio.uio_iovcnt = 1;
390 1.1 jonathan cse->uio.uio_resid = 0;
391 1.1 jonathan cse->uio.uio_rw = UIO_WRITE;
392 1.1 jonathan cse->uio.uio_iov = cse->iovec;
393 1.17 yamt UIO_SETUP_SYSSPACE(&cse->uio);
394 1.29 tls memset(&cse->iovec, 0, sizeof(cse->iovec));
395 1.1 jonathan cse->uio.uio_iov[0].iov_len = cop->len;
396 1.1 jonathan cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
397 1.29 tls cse->uio.uio_resid = cse->uio.uio_iov[0].iov_len;
398 1.1 jonathan
399 1.1 jonathan crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
400 1.1 jonathan if (crp == NULL) {
401 1.1 jonathan error = ENOMEM;
402 1.1 jonathan goto bail;
403 1.1 jonathan }
404 1.1 jonathan
405 1.1 jonathan if (cse->thash) {
406 1.1 jonathan crda = crp->crp_desc;
407 1.1 jonathan if (cse->txform)
408 1.1 jonathan crde = crda->crd_next;
409 1.1 jonathan } else {
410 1.1 jonathan if (cse->txform)
411 1.1 jonathan crde = crp->crp_desc;
412 1.1 jonathan else {
413 1.1 jonathan error = EINVAL;
414 1.1 jonathan goto bail;
415 1.1 jonathan }
416 1.1 jonathan }
417 1.1 jonathan
418 1.1 jonathan if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
419 1.1 jonathan goto bail;
420 1.1 jonathan
421 1.1 jonathan if (crda) {
422 1.1 jonathan crda->crd_skip = 0;
423 1.1 jonathan crda->crd_len = cop->len;
424 1.1 jonathan crda->crd_inject = 0; /* ??? */
425 1.1 jonathan
426 1.1 jonathan crda->crd_alg = cse->mac;
427 1.1 jonathan crda->crd_key = cse->mackey;
428 1.1 jonathan crda->crd_klen = cse->mackeylen * 8;
429 1.1 jonathan }
430 1.1 jonathan
431 1.1 jonathan if (crde) {
432 1.1 jonathan if (cop->op == COP_ENCRYPT)
433 1.1 jonathan crde->crd_flags |= CRD_F_ENCRYPT;
434 1.1 jonathan else
435 1.1 jonathan crde->crd_flags &= ~CRD_F_ENCRYPT;
436 1.1 jonathan crde->crd_len = cop->len;
437 1.1 jonathan crde->crd_inject = 0;
438 1.1 jonathan
439 1.1 jonathan crde->crd_alg = cse->cipher;
440 1.1 jonathan crde->crd_key = cse->key;
441 1.1 jonathan crde->crd_klen = cse->keylen * 8;
442 1.1 jonathan }
443 1.1 jonathan
444 1.1 jonathan crp->crp_ilen = cop->len;
445 1.1 jonathan crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
446 1.1 jonathan | (cop->flags & COP_F_BATCH);
447 1.26 christos crp->crp_buf = (void *)&cse->uio;
448 1.1 jonathan crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
449 1.1 jonathan crp->crp_sid = cse->sid;
450 1.1 jonathan crp->crp_opaque = (void *)cse;
451 1.1 jonathan
452 1.1 jonathan if (cop->iv) {
453 1.1 jonathan if (crde == NULL) {
454 1.1 jonathan error = EINVAL;
455 1.1 jonathan goto bail;
456 1.1 jonathan }
457 1.1 jonathan if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
458 1.1 jonathan error = EINVAL;
459 1.1 jonathan goto bail;
460 1.1 jonathan }
461 1.1 jonathan if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
462 1.1 jonathan goto bail;
463 1.1 jonathan bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
464 1.1 jonathan crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
465 1.1 jonathan crde->crd_skip = 0;
466 1.1 jonathan } else if (crde) {
467 1.20 christos if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
468 1.20 christos crde->crd_skip = 0;
469 1.20 christos } else {
470 1.20 christos crde->crd_flags |= CRD_F_IV_PRESENT;
471 1.20 christos crde->crd_skip = cse->txform->blocksize;
472 1.20 christos crde->crd_len -= cse->txform->blocksize;
473 1.20 christos }
474 1.1 jonathan }
475 1.1 jonathan
476 1.1 jonathan if (cop->mac) {
477 1.1 jonathan if (crda == NULL) {
478 1.1 jonathan error = EINVAL;
479 1.1 jonathan goto bail;
480 1.1 jonathan }
481 1.1 jonathan crp->crp_mac=cse->tmp_mac;
482 1.1 jonathan }
483 1.1 jonathan
484 1.33 tls /*
485 1.33 tls * XXX there was a comment here which said that we went to
486 1.33 tls * XXX splcrypto() but needed to only if CRYPTO_F_CBIMM,
487 1.33 tls * XXX disabled on NetBSD since 1.6O due to a race condition.
488 1.33 tls * XXX But crypto_dispatch went to splcrypto() itself! (And
489 1.33 tls * XXX now takes the crypto_mtx mutex itself). We do, however,
490 1.33 tls * XXX need to hold the mutex across the call to cv_wait().
491 1.33 tls * XXX (should we arrange for crypto_dispatch to return to
492 1.33 tls * XXX us with it held? it seems quite ugly to do so.)
493 1.33 tls */
494 1.1 jonathan error = crypto_dispatch(crp);
495 1.33 tls mutex_spin_enter(&crypto_mtx);
496 1.33 tls if (error != 0) {
497 1.33 tls DPRINTF(("cryptodev_op: not waiting, error.\n"));
498 1.33 tls mutex_spin_exit(&crypto_mtx);
499 1.1 jonathan goto bail;
500 1.1 jonathan }
501 1.33 tls while (!(crp->crp_flags & CRYPTO_F_DONE)) {
502 1.33 tls DPRINTF(("cryptodev_op: sleeping on cv %08x for crp %08x\n", \
503 1.33 tls (uint32_t)&crp->crp_cv, (uint32_t)crp));
504 1.33 tls cv_wait(&crp->crp_cv, &crypto_mtx); /* XXX cv_wait_sig? */
505 1.33 tls }
506 1.33 tls if (crp->crp_flags & CRYPTO_F_ONRETQ) {
507 1.33 tls DPRINTF(("cryptodev_op: DONE, not woken by cryptoret.\n"));
508 1.33 tls (void)crypto_ret_q_remove(crp);
509 1.33 tls }
510 1.33 tls mutex_spin_exit(&crypto_mtx);
511 1.1 jonathan
512 1.1 jonathan if (crp->crp_etype != 0) {
513 1.34 tls DPRINTF(("cryptodev_op: crp_etype %d\n", crp->crp_etype));
514 1.1 jonathan error = crp->crp_etype;
515 1.1 jonathan goto bail;
516 1.1 jonathan }
517 1.1 jonathan
518 1.1 jonathan if (cse->error) {
519 1.34 tls DPRINTF(("cryptodev_op: cse->error %d\n", cse->error));
520 1.1 jonathan error = cse->error;
521 1.1 jonathan goto bail;
522 1.1 jonathan }
523 1.1 jonathan
524 1.1 jonathan if (cop->dst &&
525 1.34 tls (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) {
526 1.34 tls DPRINTF(("cryptodev_op: copyout error %d\n", error));
527 1.1 jonathan goto bail;
528 1.34 tls }
529 1.1 jonathan
530 1.1 jonathan if (cop->mac &&
531 1.34 tls (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) {
532 1.34 tls DPRINTF(("cryptodev_op: mac copyout error %d\n", error));
533 1.1 jonathan goto bail;
534 1.34 tls }
535 1.1 jonathan
536 1.1 jonathan bail:
537 1.1 jonathan if (crp)
538 1.1 jonathan crypto_freereq(crp);
539 1.1 jonathan if (cse->uio.uio_iov[0].iov_base)
540 1.1 jonathan free(cse->uio.uio_iov[0].iov_base, M_XDATA);
541 1.1 jonathan
542 1.1 jonathan return (error);
543 1.1 jonathan }
544 1.1 jonathan
545 1.1 jonathan static int
546 1.1 jonathan cryptodev_cb(void *op)
547 1.1 jonathan {
548 1.1 jonathan struct cryptop *crp = (struct cryptop *) op;
549 1.1 jonathan struct csession *cse = (struct csession *)crp->crp_opaque;
550 1.33 tls int error = 0;
551 1.1 jonathan
552 1.33 tls mutex_spin_enter(&crypto_mtx);
553 1.1 jonathan cse->error = crp->crp_etype;
554 1.33 tls if (crp->crp_etype == EAGAIN) {
555 1.33 tls /* always drop mutex to call dispatch routine */
556 1.33 tls mutex_spin_exit(&crypto_mtx);
557 1.33 tls error = crypto_dispatch(crp);
558 1.33 tls mutex_spin_enter(&crypto_mtx);
559 1.33 tls }
560 1.33 tls if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) {
561 1.33 tls cv_signal(&crp->crp_cv);
562 1.33 tls }
563 1.33 tls mutex_spin_exit(&crypto_mtx);
564 1.1 jonathan return (0);
565 1.1 jonathan }
566 1.1 jonathan
567 1.1 jonathan static int
568 1.1 jonathan cryptodevkey_cb(void *op)
569 1.1 jonathan {
570 1.1 jonathan struct cryptkop *krp = (struct cryptkop *) op;
571 1.1 jonathan
572 1.33 tls mutex_spin_enter(&crypto_mtx);
573 1.33 tls cv_signal(&krp->krp_cv);
574 1.33 tls mutex_spin_exit(&crypto_mtx);
575 1.1 jonathan return (0);
576 1.1 jonathan }
577 1.1 jonathan
578 1.1 jonathan static int
579 1.1 jonathan cryptodev_key(struct crypt_kop *kop)
580 1.1 jonathan {
581 1.1 jonathan struct cryptkop *krp = NULL;
582 1.1 jonathan int error = EINVAL;
583 1.1 jonathan int in, out, size, i;
584 1.1 jonathan
585 1.1 jonathan if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
586 1.1 jonathan return (EFBIG);
587 1.1 jonathan }
588 1.1 jonathan
589 1.1 jonathan in = kop->crk_iparams;
590 1.1 jonathan out = kop->crk_oparams;
591 1.1 jonathan switch (kop->crk_op) {
592 1.1 jonathan case CRK_MOD_EXP:
593 1.1 jonathan if (in == 3 && out == 1)
594 1.1 jonathan break;
595 1.1 jonathan return (EINVAL);
596 1.1 jonathan case CRK_MOD_EXP_CRT:
597 1.1 jonathan if (in == 6 && out == 1)
598 1.1 jonathan break;
599 1.1 jonathan return (EINVAL);
600 1.1 jonathan case CRK_DSA_SIGN:
601 1.1 jonathan if (in == 5 && out == 2)
602 1.1 jonathan break;
603 1.1 jonathan return (EINVAL);
604 1.1 jonathan case CRK_DSA_VERIFY:
605 1.1 jonathan if (in == 7 && out == 0)
606 1.1 jonathan break;
607 1.1 jonathan return (EINVAL);
608 1.1 jonathan case CRK_DH_COMPUTE_KEY:
609 1.1 jonathan if (in == 3 && out == 1)
610 1.1 jonathan break;
611 1.1 jonathan return (EINVAL);
612 1.27 tls case CRK_MOD_ADD:
613 1.27 tls if (in == 3 && out == 1)
614 1.27 tls break;
615 1.27 tls return (EINVAL);
616 1.27 tls case CRK_MOD_ADDINV:
617 1.27 tls if (in == 2 && out == 1)
618 1.27 tls break;
619 1.27 tls return (EINVAL);
620 1.27 tls case CRK_MOD_SUB:
621 1.27 tls if (in == 3 && out == 1)
622 1.27 tls break;
623 1.27 tls return (EINVAL);
624 1.27 tls case CRK_MOD_MULT:
625 1.27 tls if (in == 3 && out == 1)
626 1.27 tls break;
627 1.27 tls return (EINVAL);
628 1.27 tls case CRK_MOD_MULTINV:
629 1.27 tls if (in == 2 && out == 1)
630 1.27 tls break;
631 1.27 tls return (EINVAL);
632 1.27 tls case CRK_MOD:
633 1.27 tls if (in == 2 && out == 1)
634 1.27 tls break;
635 1.27 tls return (EINVAL);
636 1.1 jonathan default:
637 1.1 jonathan return (EINVAL);
638 1.1 jonathan }
639 1.1 jonathan
640 1.33 tls krp = pool_get(&cryptkop_pool, PR_WAITOK);
641 1.1 jonathan if (!krp)
642 1.1 jonathan return (ENOMEM);
643 1.1 jonathan bzero(krp, sizeof *krp);
644 1.33 tls cv_init(&krp->krp_cv, "crykdev");
645 1.1 jonathan krp->krp_op = kop->crk_op;
646 1.1 jonathan krp->krp_status = kop->crk_status;
647 1.1 jonathan krp->krp_iparams = kop->crk_iparams;
648 1.1 jonathan krp->krp_oparams = kop->crk_oparams;
649 1.1 jonathan krp->krp_status = 0;
650 1.1 jonathan krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
651 1.1 jonathan
652 1.1 jonathan for (i = 0; i < CRK_MAXPARAM; i++)
653 1.1 jonathan krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
654 1.1 jonathan for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
655 1.1 jonathan size = (krp->krp_param[i].crp_nbits + 7) / 8;
656 1.1 jonathan if (size == 0)
657 1.1 jonathan continue;
658 1.19 christos krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
659 1.1 jonathan if (i >= krp->krp_iparams)
660 1.1 jonathan continue;
661 1.1 jonathan error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
662 1.1 jonathan if (error)
663 1.1 jonathan goto fail;
664 1.1 jonathan }
665 1.1 jonathan
666 1.1 jonathan error = crypto_kdispatch(krp);
667 1.33 tls if (error != 0) {
668 1.1 jonathan goto fail;
669 1.33 tls }
670 1.33 tls
671 1.33 tls mutex_spin_enter(&crypto_mtx);
672 1.33 tls while (!(krp->krp_flags & CRYPTO_F_DONE)) {
673 1.33 tls cv_wait(&krp->krp_cv, &crypto_mtx); /* XXX cv_wait_sig? */
674 1.33 tls }
675 1.33 tls if (krp->krp_flags & CRYPTO_F_ONRETQ) {
676 1.33 tls DPRINTF(("cryptodev_key: DONE early, not via cryptoret.\n"));
677 1.33 tls (void)crypto_ret_kq_remove(krp);
678 1.33 tls }
679 1.33 tls mutex_spin_exit(&crypto_mtx);
680 1.1 jonathan
681 1.1 jonathan if (krp->krp_status != 0) {
682 1.34 tls DPRINTF(("cryptodev_key: krp->krp_status 0x%08x\n", krp->krp_status));
683 1.1 jonathan error = krp->krp_status;
684 1.1 jonathan goto fail;
685 1.1 jonathan }
686 1.1 jonathan
687 1.1 jonathan for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
688 1.1 jonathan size = (krp->krp_param[i].crp_nbits + 7) / 8;
689 1.1 jonathan if (size == 0)
690 1.1 jonathan continue;
691 1.1 jonathan error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
692 1.34 tls if (error) {
693 1.34 tls DPRINTF(("cryptodev_key: copyout oparam %d failed, error=%d\n", i-krp->krp_iparams, error));
694 1.1 jonathan goto fail;
695 1.34 tls }
696 1.1 jonathan }
697 1.1 jonathan
698 1.1 jonathan fail:
699 1.1 jonathan if (krp) {
700 1.1 jonathan kop->crk_status = krp->krp_status;
701 1.1 jonathan for (i = 0; i < CRK_MAXPARAM; i++) {
702 1.1 jonathan if (krp->krp_param[i].crp_p)
703 1.1 jonathan FREE(krp->krp_param[i].crp_p, M_XDATA);
704 1.1 jonathan }
705 1.33 tls pool_put(&cryptkop_pool, krp);
706 1.1 jonathan }
707 1.34 tls DPRINTF(("cryptodev_key: error=0x%08x\n", error));
708 1.1 jonathan return (error);
709 1.1 jonathan }
710 1.1 jonathan
711 1.1 jonathan /* ARGSUSED */
712 1.1 jonathan static int
713 1.35 ad cryptof_close(file_t *fp)
714 1.1 jonathan {
715 1.35 ad struct fcrypt *fcr = fp->f_data;
716 1.1 jonathan struct csession *cse;
717 1.1 jonathan
718 1.33 tls mutex_spin_enter(&crypto_mtx);
719 1.1 jonathan while ((cse = TAILQ_FIRST(&fcr->csessions))) {
720 1.1 jonathan TAILQ_REMOVE(&fcr->csessions, cse, next);
721 1.1 jonathan (void)csefree(cse);
722 1.1 jonathan }
723 1.29 tls pool_put(&fcrpl, fcr);
724 1.1 jonathan
725 1.1 jonathan fp->f_data = NULL;
726 1.33 tls mutex_spin_exit(&crypto_mtx);
727 1.1 jonathan
728 1.1 jonathan return 0;
729 1.1 jonathan }
730 1.1 jonathan
731 1.33 tls /* csefind: call with crypto_mtx held. */
732 1.1 jonathan static struct csession *
733 1.1 jonathan csefind(struct fcrypt *fcr, u_int ses)
734 1.1 jonathan {
735 1.33 tls struct csession *cse, *ret = NULL;
736 1.1 jonathan
737 1.33 tls KASSERT(mutex_owned(&crypto_mtx));
738 1.1 jonathan TAILQ_FOREACH(cse, &fcr->csessions, next)
739 1.1 jonathan if (cse->ses == ses)
740 1.33 tls ret = cse;
741 1.33 tls return (ret);
742 1.1 jonathan }
743 1.1 jonathan
744 1.33 tls /* csedelete: call with crypto_mtx held. */
745 1.1 jonathan static int
746 1.1 jonathan csedelete(struct fcrypt *fcr, struct csession *cse_del)
747 1.1 jonathan {
748 1.1 jonathan struct csession *cse;
749 1.33 tls int ret = 0;
750 1.1 jonathan
751 1.33 tls KASSERT(mutex_owned(&crypto_mtx));
752 1.1 jonathan TAILQ_FOREACH(cse, &fcr->csessions, next) {
753 1.1 jonathan if (cse == cse_del) {
754 1.1 jonathan TAILQ_REMOVE(&fcr->csessions, cse, next);
755 1.33 tls ret = 1;
756 1.1 jonathan }
757 1.1 jonathan }
758 1.33 tls return (ret);
759 1.1 jonathan }
760 1.1 jonathan
761 1.33 tls /* cseadd: call with crypto_mtx held. */
762 1.1 jonathan static struct csession *
763 1.1 jonathan cseadd(struct fcrypt *fcr, struct csession *cse)
764 1.1 jonathan {
765 1.33 tls KASSERT(mutex_owned(&crypto_mtx));
766 1.33 tls /* don't let session ID wrap! */
767 1.33 tls if (fcr->sesn + 1 == 0) return NULL;
768 1.1 jonathan TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
769 1.1 jonathan cse->ses = fcr->sesn++;
770 1.1 jonathan return (cse);
771 1.1 jonathan }
772 1.1 jonathan
773 1.33 tls /* csecreate: call with crypto_mtx held. */
774 1.1 jonathan static struct csession *
775 1.26 christos csecreate(struct fcrypt *fcr, u_int64_t sid, void *key, u_int64_t keylen,
776 1.26 christos void *mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
777 1.1 jonathan struct enc_xform *txform, struct auth_hash *thash)
778 1.1 jonathan {
779 1.1 jonathan struct csession *cse;
780 1.1 jonathan
781 1.33 tls KASSERT(mutex_owned(&crypto_mtx));
782 1.29 tls cse = pool_get(&csepl, PR_NOWAIT);
783 1.1 jonathan if (cse == NULL)
784 1.1 jonathan return NULL;
785 1.1 jonathan cse->key = key;
786 1.1 jonathan cse->keylen = keylen/8;
787 1.1 jonathan cse->mackey = mackey;
788 1.1 jonathan cse->mackeylen = mackeylen/8;
789 1.1 jonathan cse->sid = sid;
790 1.1 jonathan cse->cipher = cipher;
791 1.1 jonathan cse->mac = mac;
792 1.1 jonathan cse->txform = txform;
793 1.1 jonathan cse->thash = thash;
794 1.34 tls cse->error = 0;
795 1.28 tls if (cseadd(fcr, cse))
796 1.28 tls return (cse);
797 1.28 tls else {
798 1.33 tls pool_put(&csepl, cse);
799 1.28 tls return NULL;
800 1.28 tls }
801 1.1 jonathan }
802 1.1 jonathan
803 1.33 tls /* csefree: call with crypto_mtx held. */
804 1.1 jonathan static int
805 1.1 jonathan csefree(struct csession *cse)
806 1.1 jonathan {
807 1.1 jonathan int error;
808 1.1 jonathan
809 1.33 tls KASSERT(mutex_owned(&crypto_mtx));
810 1.1 jonathan error = crypto_freesession(cse->sid);
811 1.1 jonathan if (cse->key)
812 1.1 jonathan FREE(cse->key, M_XDATA);
813 1.1 jonathan if (cse->mackey)
814 1.1 jonathan FREE(cse->mackey, M_XDATA);
815 1.29 tls pool_put(&csepl, cse);
816 1.1 jonathan return (error);
817 1.1 jonathan }
818 1.1 jonathan
819 1.1 jonathan static int
820 1.25 christos cryptoopen(dev_t dev, int flag, int mode,
821 1.25 christos struct lwp *l)
822 1.1 jonathan {
823 1.35 ad file_t *fp;
824 1.29 tls struct fcrypt *fcr;
825 1.29 tls int fd, error;
826 1.29 tls
827 1.1 jonathan if (crypto_usercrypto == 0)
828 1.1 jonathan return (ENXIO);
829 1.29 tls
830 1.35 ad if ((error = fd_allocfile(&fp, &fd)) != 0)
831 1.29 tls return error;
832 1.29 tls
833 1.29 tls fcr = pool_get(&fcrpl, PR_WAITOK);
834 1.33 tls mutex_spin_enter(&crypto_mtx);
835 1.29 tls TAILQ_INIT(&fcr->csessions);
836 1.29 tls /*
837 1.29 tls * Don't ever return session 0, to allow detection of
838 1.29 tls * failed creation attempts with multi-create ioctl.
839 1.29 tls */
840 1.29 tls fcr->sesn = 1;
841 1.33 tls mutex_spin_exit(&crypto_mtx);
842 1.35 ad return fd_clone(fp, fd, flag, &cryptofops, fcr);
843 1.1 jonathan }
844 1.1 jonathan
845 1.1 jonathan static int
846 1.25 christos cryptoread(dev_t dev, struct uio *uio, int ioflag)
847 1.1 jonathan {
848 1.1 jonathan return (EIO);
849 1.1 jonathan }
850 1.1 jonathan
851 1.1 jonathan static int
852 1.25 christos cryptowrite(dev_t dev, struct uio *uio, int ioflag)
853 1.1 jonathan {
854 1.1 jonathan return (EIO);
855 1.1 jonathan }
856 1.1 jonathan
857 1.1 jonathan int
858 1.25 christos cryptoselect(dev_t dev, int rw, struct lwp *l)
859 1.1 jonathan {
860 1.1 jonathan return (0);
861 1.1 jonathan }
862 1.1 jonathan
863 1.1 jonathan /*static*/
864 1.1 jonathan struct cdevsw crypto_cdevsw = {
865 1.1 jonathan /* open */ cryptoopen,
866 1.29 tls /* close */ noclose,
867 1.1 jonathan /* read */ cryptoread,
868 1.1 jonathan /* write */ cryptowrite,
869 1.29 tls /* ioctl */ noioctl,
870 1.1 jonathan /* ttstop?*/ nostop,
871 1.1 jonathan /* ??*/ notty,
872 1.1 jonathan /* poll */ cryptoselect /*nopoll*/,
873 1.1 jonathan /* mmap */ nommap,
874 1.1 jonathan /* kqfilter */ nokqfilter,
875 1.23 christos /* type */ D_OTHER,
876 1.1 jonathan };
877 1.1 jonathan
878 1.15 thorpej /*
879 1.15 thorpej * Pseudo-device initialization routine for /dev/crypto
880 1.15 thorpej */
881 1.15 thorpej void cryptoattach(int);
882 1.15 thorpej
883 1.15 thorpej void
884 1.25 christos cryptoattach(int num)
885 1.15 thorpej {
886 1.29 tls pool_init(&fcrpl, sizeof(struct fcrypt), 0, 0, 0, "fcrpl",
887 1.29 tls NULL, IPL_NET); /* XXX IPL_NET ("splcrypto") */
888 1.29 tls pool_init(&csepl, sizeof(struct csession), 0, 0, 0, "csepl",
889 1.29 tls NULL, IPL_NET); /* XXX IPL_NET ("splcrypto") */
890 1.29 tls
891 1.29 tls /*
892 1.29 tls * Preallocate space for 64 users, with 5 sessions each.
893 1.29 tls * (consider that a TLS protocol session requires at least
894 1.29 tls * 3DES, MD5, and SHA1 (both hashes are used in the PRF) for
895 1.29 tls * the negotiation, plus HMAC_SHA1 for the actual SSL records,
896 1.29 tls * consuming one session here for each algorithm.
897 1.29 tls */
898 1.29 tls pool_prime(&fcrpl, 64);
899 1.29 tls pool_prime(&csepl, 64 * 5);
900 1.15 thorpej }
901