cryptodev.c revision 158700
1/* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */ 2 3/*- 4 * Copyright (c) 2001 Theo de Raadt 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * Effort sponsored in part by the Defense Advanced Research Projects 30 * Agency (DARPA) and Air Force Research Laboratory, Air Force 31 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 32 */ 33 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: head/sys/opencrypto/cryptodev.c 158700 2006-05-17 18:01:51Z pjd $"); 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/malloc.h> 40#include <sys/mbuf.h> 41#include <sys/lock.h> 42#include <sys/mutex.h> 43#include <sys/sysctl.h> 44#include <sys/file.h> 45#include <sys/filedesc.h> 46#include <sys/errno.h> 47#include <sys/uio.h> 48#include <sys/random.h> 49#include <sys/conf.h> 50#include <sys/kernel.h> 51#include <sys/module.h> 52#include <sys/fcntl.h> 53 54#include <opencrypto/cryptodev.h> 55#include <opencrypto/xform.h> 56 57struct csession { 58 TAILQ_ENTRY(csession) next; 59 u_int64_t sid; 60 u_int32_t ses; 61 struct mtx lock; /* for op submission */ 62 63 u_int32_t cipher; 64 struct enc_xform *txform; 65 u_int32_t mac; 66 struct auth_hash *thash; 67 68 caddr_t key; 69 int keylen; 70 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 71 72 caddr_t mackey; 73 int mackeylen; 74 u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; 75 76 struct iovec iovec; 77 struct uio uio; 78 int error; 79}; 80 81struct fcrypt { 82 TAILQ_HEAD(csessionlist, csession) csessions; 83 int sesn; 84}; 85 86static int cryptof_rw(struct file *fp, struct uio *uio, 87 struct ucred *cred, int flags, struct thread *); 88static int cryptof_ioctl(struct file *, u_long, void *, 89 struct ucred *, struct thread *); 90static int cryptof_poll(struct file *, int, struct ucred *, struct thread *); 91static int cryptof_kqfilter(struct file *, struct knote *); 92static int cryptof_stat(struct file *, struct stat *, 93 struct ucred *, struct thread *); 94static int cryptof_close(struct file *, struct thread *); 95 96static struct fileops cryptofops = { 97 .fo_read = cryptof_rw, 98 .fo_write = cryptof_rw, 99 .fo_ioctl = cryptof_ioctl, 100 .fo_poll = cryptof_poll, 101 .fo_kqfilter = cryptof_kqfilter, 102 .fo_stat = cryptof_stat, 103 .fo_close = cryptof_close 104}; 105 106static struct csession *csefind(struct fcrypt *, u_int); 107static int csedelete(struct fcrypt *, struct csession *); 108static struct csession *cseadd(struct fcrypt *, struct csession *); 109static 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 *, 111 struct auth_hash *); 112static int csefree(struct csession *); 113 114static int cryptodev_op(struct csession *, struct crypt_op *, 115 struct ucred *, struct thread *td); 116static int cryptodev_key(struct crypt_kop *); 117 118static int 119cryptof_rw( 120 struct file *fp, 121 struct uio *uio, 122 struct ucred *active_cred, 123 int flags, 124 struct thread *td) 125{ 126 127 return (EIO); 128} 129 130/* ARGSUSED */ 131static int 132cryptof_ioctl( 133 struct file *fp, 134 u_long cmd, 135 void *data, 136 struct ucred *active_cred, 137 struct thread *td) 138{ 139 struct cryptoini cria, crie; 140 struct fcrypt *fcr = fp->f_data; 141 struct csession *cse; 142 struct session_op *sop; 143 struct crypt_op *cop; 144 struct enc_xform *txform = NULL; 145 struct auth_hash *thash = NULL; 146 u_int64_t sid; 147 u_int32_t ses; 148 int error = 0; 149 150 /* 151 * XXX: Not sure Giant is needed, but better safe than sorry 152 */ 153 mtx_lock(&Giant); 154 switch (cmd) { 155 case CIOCGSESSION: 156 sop = (struct session_op *)data; 157 switch (sop->cipher) { 158 case 0: 159 break; 160 case CRYPTO_DES_CBC: 161 txform = &enc_xform_des; 162 break; 163 case CRYPTO_3DES_CBC: 164 txform = &enc_xform_3des; 165 break; 166 case CRYPTO_BLF_CBC: 167 txform = &enc_xform_blf; 168 break; 169 case CRYPTO_CAST_CBC: 170 txform = &enc_xform_cast5; 171 break; 172 case CRYPTO_SKIPJACK_CBC: 173 txform = &enc_xform_skipjack; 174 break; 175 case CRYPTO_AES_CBC: 176 txform = &enc_xform_rijndael128; 177 break; 178 case CRYPTO_NULL_CBC: 179 txform = &enc_xform_null; 180 break; 181 case CRYPTO_ARC4: 182 txform = &enc_xform_arc4; 183 break; 184 default: 185 mtx_unlock(&Giant); 186 return (EINVAL); 187 } 188 189 switch (sop->mac) { 190 case 0: 191 break; 192 case CRYPTO_MD5_HMAC: 193 thash = &auth_hash_hmac_md5_96; 194 break; 195 case CRYPTO_SHA1_HMAC: 196 thash = &auth_hash_hmac_sha1_96; 197 break; 198 case CRYPTO_SHA2_HMAC: 199 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 200 thash = &auth_hash_hmac_sha2_256; 201 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 202 thash = &auth_hash_hmac_sha2_384; 203 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 204 thash = &auth_hash_hmac_sha2_512; 205 else { 206 mtx_unlock(&Giant); 207 return (EINVAL); 208 } 209 break; 210 case CRYPTO_RIPEMD160_HMAC: 211 thash = &auth_hash_hmac_ripemd_160_96; 212 break; 213#ifdef notdef 214 case CRYPTO_MD5: 215 thash = &auth_hash_md5; 216 break; 217 case CRYPTO_SHA1: 218 thash = &auth_hash_sha1; 219 break; 220#endif 221 case CRYPTO_NULL_HMAC: 222 thash = &auth_hash_null; 223 break; 224 default: 225 mtx_unlock(&Giant); 226 return (EINVAL); 227 } 228 229 bzero(&crie, sizeof(crie)); 230 bzero(&cria, sizeof(cria)); 231 232 if (txform) { 233 crie.cri_alg = txform->type; 234 crie.cri_klen = sop->keylen * 8; 235 if (sop->keylen > txform->maxkey || 236 sop->keylen < txform->minkey) { 237 error = EINVAL; 238 goto bail; 239 } 240 241 MALLOC(crie.cri_key, u_int8_t *, 242 crie.cri_klen / 8, M_XDATA, M_WAITOK); 243 if ((error = copyin(sop->key, crie.cri_key, 244 crie.cri_klen / 8))) 245 goto bail; 246 if (thash) 247 crie.cri_next = &cria; 248 } 249 250 if (thash) { 251 cria.cri_alg = thash->type; 252 cria.cri_klen = sop->mackeylen * 8; 253 if (sop->mackeylen != thash->keysize) { 254 error = EINVAL; 255 goto bail; 256 } 257 258 if (cria.cri_klen) { 259 MALLOC(cria.cri_key, u_int8_t *, 260 cria.cri_klen / 8, M_XDATA, M_WAITOK); 261 if ((error = copyin(sop->mackey, cria.cri_key, 262 cria.cri_klen / 8))) 263 goto bail; 264 } 265 } 266 267 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1); 268 if (error) { 269 if (crypto_devallowsoft) { 270 error = crypto_newsession(&sid, 271 (txform ? &crie : &cria), 0); 272 } 273 if (error) 274 goto bail; 275 } 276 277 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 278 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 279 thash); 280 281 if (cse == NULL) { 282 crypto_freesession(sid); 283 error = EINVAL; 284 goto bail; 285 } 286 sop->ses = cse->ses; 287 288bail: 289 if (error) { 290 if (crie.cri_key) 291 FREE(crie.cri_key, M_XDATA); 292 if (cria.cri_key) 293 FREE(cria.cri_key, M_XDATA); 294 } 295 break; 296 case CIOCFSESSION: 297 ses = *(u_int32_t *)data; 298 cse = csefind(fcr, ses); 299 if (cse == NULL) { 300 mtx_unlock(&Giant); 301 return (EINVAL); 302 } 303 csedelete(fcr, cse); 304 error = csefree(cse); 305 break; 306 case CIOCCRYPT: 307 cop = (struct crypt_op *)data; 308 cse = csefind(fcr, cop->ses); 309 if (cse == NULL) { 310 mtx_unlock(&Giant); 311 return (EINVAL); 312 } 313 error = cryptodev_op(cse, cop, active_cred, td); 314 break; 315 case CIOCKEY: 316 error = cryptodev_key((struct crypt_kop *)data); 317 break; 318 case CIOCASYMFEAT: 319 error = crypto_getfeat((int *)data); 320 break; 321 default: 322 error = EINVAL; 323 } 324 mtx_unlock(&Giant); 325 return (error); 326} 327 328static int cryptodev_cb(void *); 329 330 331static int 332cryptodev_op( 333 struct csession *cse, 334 struct crypt_op *cop, 335 struct ucred *active_cred, 336 struct thread *td) 337{ 338 struct cryptop *crp = NULL; 339 struct cryptodesc *crde = NULL, *crda = NULL; 340 int error; 341 342 if (cop->len > 256*1024-4) 343 return (E2BIG); 344 345 if (cse->txform) { 346 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 347 return (EINVAL); 348 } 349 350 cse->uio.uio_iov = &cse->iovec; 351 cse->uio.uio_iovcnt = 1; 352 cse->uio.uio_offset = 0; 353 cse->uio.uio_resid = cop->len; 354 cse->uio.uio_segflg = UIO_SYSSPACE; 355 cse->uio.uio_rw = UIO_WRITE; 356 cse->uio.uio_td = td; 357 cse->uio.uio_iov[0].iov_len = cop->len; 358 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 359 360 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 361 if (crp == NULL) { 362 error = ENOMEM; 363 goto bail; 364 } 365 366 if (cse->thash) { 367 crda = crp->crp_desc; 368 if (cse->txform) 369 crde = crda->crd_next; 370 } else { 371 if (cse->txform) 372 crde = crp->crp_desc; 373 else { 374 error = EINVAL; 375 goto bail; 376 } 377 } 378 379 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 380 goto bail; 381 382 if (crda) { 383 crda->crd_skip = 0; 384 crda->crd_len = cop->len; 385 crda->crd_inject = 0; /* ??? */ 386 387 crda->crd_alg = cse->mac; 388 crda->crd_key = cse->mackey; 389 crda->crd_klen = cse->mackeylen * 8; 390 } 391 392 if (crde) { 393 if (cop->op == COP_ENCRYPT) 394 crde->crd_flags |= CRD_F_ENCRYPT; 395 else 396 crde->crd_flags &= ~CRD_F_ENCRYPT; 397 crde->crd_len = cop->len; 398 crde->crd_inject = 0; 399 400 crde->crd_alg = cse->cipher; 401 crde->crd_key = cse->key; 402 crde->crd_klen = cse->keylen * 8; 403 } 404 405 crp->crp_ilen = cop->len; 406 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 407 | (cop->flags & COP_F_BATCH); 408 crp->crp_buf = (caddr_t)&cse->uio; 409 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 410 crp->crp_sid = cse->sid; 411 crp->crp_opaque = (void *)cse; 412 413 if (cop->iv) { 414 if (crde == NULL) { 415 error = EINVAL; 416 goto bail; 417 } 418 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 419 error = EINVAL; 420 goto bail; 421 } 422 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 423 goto bail; 424 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 425 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 426 crde->crd_skip = 0; 427 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 428 crde->crd_skip = 0; 429 } else if (crde) { 430 crde->crd_flags |= CRD_F_IV_PRESENT; 431 crde->crd_skip = cse->txform->blocksize; 432 crde->crd_len -= cse->txform->blocksize; 433 } 434 435 if (cop->mac) { 436 if (crda == NULL) { 437 error = EINVAL; 438 goto bail; 439 } 440 crp->crp_mac=cse->tmp_mac; 441 } 442 443 /* 444 * Let the dispatch run unlocked, then, interlock against the 445 * callback before checking if the operation completed and going 446 * to sleep. This insures drivers don't inherit our lock which 447 * results in a lock order reversal between crypto_dispatch forced 448 * entry and the crypto_done callback into us. 449 */ 450 error = crypto_dispatch(crp); 451 mtx_lock(&cse->lock); 452 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 453 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 454 mtx_unlock(&cse->lock); 455 456 if (error != 0) 457 goto bail; 458 459 if (crp->crp_etype != 0) { 460 error = crp->crp_etype; 461 goto bail; 462 } 463 464 if (cse->error) { 465 error = cse->error; 466 goto bail; 467 } 468 469 if (cop->dst && 470 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 471 goto bail; 472 473 if (cop->mac && 474 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 475 goto bail; 476 477bail: 478 if (crp) 479 crypto_freereq(crp); 480 if (cse->uio.uio_iov[0].iov_base) 481 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 482 483 return (error); 484} 485 486static int 487cryptodev_cb(void *op) 488{ 489 struct cryptop *crp = (struct cryptop *) op; 490 struct csession *cse = (struct csession *)crp->crp_opaque; 491 492 cse->error = crp->crp_etype; 493 if (crp->crp_etype == EAGAIN) 494 return crypto_dispatch(crp); 495 mtx_lock(&cse->lock); 496 wakeup_one(crp); 497 mtx_unlock(&cse->lock); 498 return (0); 499} 500 501static int 502cryptodevkey_cb(void *op) 503{ 504 struct cryptkop *krp = (struct cryptkop *) op; 505 506 wakeup(krp); 507 return (0); 508} 509 510static int 511cryptodev_key(struct crypt_kop *kop) 512{ 513 struct cryptkop *krp = NULL; 514 int error = EINVAL; 515 int in, out, size, i; 516 517 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 518 return (EFBIG); 519 } 520 521 in = kop->crk_iparams; 522 out = kop->crk_oparams; 523 switch (kop->crk_op) { 524 case CRK_MOD_EXP: 525 if (in == 3 && out == 1) 526 break; 527 return (EINVAL); 528 case CRK_MOD_EXP_CRT: 529 if (in == 6 && out == 1) 530 break; 531 return (EINVAL); 532 case CRK_DSA_SIGN: 533 if (in == 5 && out == 2) 534 break; 535 return (EINVAL); 536 case CRK_DSA_VERIFY: 537 if (in == 7 && out == 0) 538 break; 539 return (EINVAL); 540 case CRK_DH_COMPUTE_KEY: 541 if (in == 3 && out == 1) 542 break; 543 return (EINVAL); 544 default: 545 return (EINVAL); 546 } 547 548 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 549 if (!krp) 550 return (ENOMEM); 551 bzero(krp, sizeof *krp); 552 krp->krp_op = kop->crk_op; 553 krp->krp_status = kop->crk_status; 554 krp->krp_iparams = kop->crk_iparams; 555 krp->krp_oparams = kop->crk_oparams; 556 krp->krp_status = 0; 557 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 558 559 for (i = 0; i < CRK_MAXPARAM; i++) 560 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 561 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 562 size = (krp->krp_param[i].crp_nbits + 7) / 8; 563 if (size == 0) 564 continue; 565 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 566 if (i >= krp->krp_iparams) 567 continue; 568 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 569 if (error) 570 goto fail; 571 } 572 573 error = crypto_kdispatch(krp); 574 if (error) 575 goto fail; 576 error = tsleep(krp, PSOCK, "crydev", 0); 577 if (error) { 578 /* XXX can this happen? if so, how do we recover? */ 579 goto fail; 580 } 581 582 if (krp->krp_status != 0) { 583 error = krp->krp_status; 584 goto fail; 585 } 586 587 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 588 size = (krp->krp_param[i].crp_nbits + 7) / 8; 589 if (size == 0) 590 continue; 591 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 592 if (error) 593 goto fail; 594 } 595 596fail: 597 if (krp) { 598 kop->crk_status = krp->krp_status; 599 for (i = 0; i < CRK_MAXPARAM; i++) { 600 if (krp->krp_param[i].crp_p) 601 FREE(krp->krp_param[i].crp_p, M_XDATA); 602 } 603 free(krp, M_XDATA); 604 } 605 return (error); 606} 607 608/* ARGSUSED */ 609static int 610cryptof_poll( 611 struct file *fp, 612 int events, 613 struct ucred *active_cred, 614 struct thread *td) 615{ 616 617 return (0); 618} 619 620/* ARGSUSED */ 621static int 622cryptof_kqfilter(struct file *fp, struct knote *kn) 623{ 624 625 return (0); 626} 627 628/* ARGSUSED */ 629static int 630cryptof_stat( 631 struct file *fp, 632 struct stat *sb, 633 struct ucred *active_cred, 634 struct thread *td) 635{ 636 637 return (EOPNOTSUPP); 638} 639 640/* ARGSUSED */ 641static int 642cryptof_close(struct file *fp, struct thread *td) 643{ 644 struct fcrypt *fcr = fp->f_data; 645 struct csession *cse; 646 647 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 648 TAILQ_REMOVE(&fcr->csessions, cse, next); 649 (void)csefree(cse); 650 } 651 FREE(fcr, M_XDATA); 652 fp->f_data = NULL; 653 return 0; 654} 655 656static struct csession * 657csefind(struct fcrypt *fcr, u_int ses) 658{ 659 struct csession *cse; 660 661 TAILQ_FOREACH(cse, &fcr->csessions, next) 662 if (cse->ses == ses) 663 return (cse); 664 return (NULL); 665} 666 667static int 668csedelete(struct fcrypt *fcr, struct csession *cse_del) 669{ 670 struct csession *cse; 671 672 TAILQ_FOREACH(cse, &fcr->csessions, next) { 673 if (cse == cse_del) { 674 TAILQ_REMOVE(&fcr->csessions, cse, next); 675 return (1); 676 } 677 } 678 return (0); 679} 680 681static struct csession * 682cseadd(struct fcrypt *fcr, struct csession *cse) 683{ 684 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 685 cse->ses = fcr->sesn++; 686 return (cse); 687} 688 689struct csession * 690csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 691 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 692 struct enc_xform *txform, struct auth_hash *thash) 693{ 694 struct csession *cse; 695 696#ifdef INVARIANTS 697 /* NB: required when mtx_init is built with INVARIANTS */ 698 MALLOC(cse, struct csession *, sizeof(struct csession), 699 M_XDATA, M_NOWAIT | M_ZERO); 700#else 701 MALLOC(cse, struct csession *, sizeof(struct csession), 702 M_XDATA, M_NOWAIT); 703#endif 704 if (cse == NULL) 705 return NULL; 706 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 707 cse->key = key; 708 cse->keylen = keylen/8; 709 cse->mackey = mackey; 710 cse->mackeylen = mackeylen/8; 711 cse->sid = sid; 712 cse->cipher = cipher; 713 cse->mac = mac; 714 cse->txform = txform; 715 cse->thash = thash; 716 cseadd(fcr, cse); 717 return (cse); 718} 719 720static int 721csefree(struct csession *cse) 722{ 723 int error; 724 725 error = crypto_freesession(cse->sid); 726 mtx_destroy(&cse->lock); 727 if (cse->key) 728 FREE(cse->key, M_XDATA); 729 if (cse->mackey) 730 FREE(cse->mackey, M_XDATA); 731 FREE(cse, M_XDATA); 732 return (error); 733} 734 735static int 736cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 737{ 738 return (0); 739} 740 741static int 742cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 743{ 744 return (EIO); 745} 746 747static int 748cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 749{ 750 return (EIO); 751} 752 753static int 754cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 755{ 756 struct file *f; 757 struct fcrypt *fcr; 758 int fd, error; 759 760 switch (cmd) { 761 case CRIOGET: 762 MALLOC(fcr, struct fcrypt *, 763 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 764 TAILQ_INIT(&fcr->csessions); 765 fcr->sesn = 0; 766 767 error = falloc(td, &f, &fd); 768 769 if (error) { 770 FREE(fcr, M_XDATA); 771 return (error); 772 } 773 /* falloc automatically provides an extra reference to 'f'. */ 774 f->f_flag = FREAD | FWRITE; 775 f->f_type = DTYPE_CRYPTO; 776 f->f_ops = &cryptofops; 777 f->f_data = fcr; 778 *(u_int32_t *)data = fd; 779 fdrop(f, td); 780 break; 781 default: 782 error = EINVAL; 783 break; 784 } 785 return (error); 786} 787 788static struct cdevsw crypto_cdevsw = { 789 .d_version = D_VERSION, 790 .d_flags = D_NEEDGIANT, 791 .d_open = cryptoopen, 792 .d_read = cryptoread, 793 .d_write = cryptowrite, 794 .d_ioctl = cryptoioctl, 795 .d_name = "crypto", 796}; 797static struct cdev *crypto_dev; 798 799/* 800 * Initialization code, both for static and dynamic loading. 801 */ 802static int 803cryptodev_modevent(module_t mod, int type, void *unused) 804{ 805 switch (type) { 806 case MOD_LOAD: 807 if (bootverbose) 808 printf("crypto: <crypto device>\n"); 809 crypto_dev = make_dev(&crypto_cdevsw, 0, 810 UID_ROOT, GID_WHEEL, 0666, 811 "crypto"); 812 return 0; 813 case MOD_UNLOAD: 814 /*XXX disallow if active sessions */ 815 destroy_dev(crypto_dev); 816 return 0; 817 } 818 return EINVAL; 819} 820 821static moduledata_t cryptodev_mod = { 822 "cryptodev", 823 cryptodev_modevent, 824 0 825}; 826MODULE_VERSION(cryptodev, 1); 827DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 828MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 829MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 830