1 /* $FreeBSD$ */ 2 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */ 3 4 /* 5 * Copyright (c) 2001 Theo de Raadt 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 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. 18 * 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. 29 * 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. 33 * 34 */ 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/malloc.h> 39 #include <sys/mbuf.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 #include <sys/sysctl.h> 43 #include <sys/file.h> 44 #include <sys/filedesc.h> 45 #include <sys/errno.h> 46 #include <sys/uio.h> 47 #include <sys/random.h> 48 #include <sys/conf.h> 49 #include <sys/kernel.h> 50 #include <sys/fcntl.h> 51 52 #include <opencrypto/cryptodev.h> 53 #include <opencrypto/xform.h> 54 55 struct csession { 56 TAILQ_ENTRY(csession) next; 57 u_int64_t sid; 58 u_int32_t ses; 59 60 u_int32_t cipher; 61 struct enc_xform *txform; 62 u_int32_t mac; 63 struct auth_hash *thash; 64 65 caddr_t key; 66 int keylen; 67 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 68 69 caddr_t mackey; 70 int mackeylen; 71 u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; 72 73 struct iovec iovec[UIO_MAXIOV]; 74 struct uio uio; 75 int error; 76 }; 77 78 struct fcrypt { 79 TAILQ_HEAD(csessionlist, csession) csessions; 80 int sesn; 81 }; 82 83 static int cryptof_rw(struct file *fp, struct uio *uio, 84 struct ucred *cred, int flags, struct thread *); 85 static int cryptof_ioctl(struct file *, u_long, void *, 86 struct ucred *, struct thread *); 87 static int cryptof_poll(struct file *, int, struct ucred *, struct thread *); 88 static int cryptof_kqfilter(struct file *, struct knote *); 89 static int cryptof_stat(struct file *, struct stat *, 90 struct ucred *, struct thread *); 91 static int cryptof_close(struct file *, struct thread *); 92 93 static struct fileops cryptofops = { 94 cryptof_rw, 95 cryptof_rw, 96 cryptof_ioctl, 97 cryptof_poll, 98 cryptof_kqfilter, 99 cryptof_stat, 100 cryptof_close 101 }; 102 103 static struct csession *csefind(struct fcrypt *, u_int); 104 static int csedelete(struct fcrypt *, struct csession *); 105 static struct csession *cseadd(struct fcrypt *, struct csession *); 106 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, 107 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 108 struct auth_hash *); 109 static int csefree(struct csession *); 110 111 static int cryptodev_op(struct csession *, struct crypt_op *, 112 struct ucred *, struct thread *td); 113 static int cryptodev_key(struct crypt_kop *); 114 115 static int 116 cryptof_rw( 117 struct file *fp, 118 struct uio *uio, 119 struct ucred *active_cred, 120 int flags, 121 struct thread *td) 122 { 123 124 return (EIO); 125 } 126 127 /* ARGSUSED */ 128 static int 129 cryptof_ioctl( 130 struct file *fp, 131 u_long cmd, 132 void *data, 133 struct ucred *active_cred, 134 struct thread *td) 135 { 136 struct cryptoini cria, crie; 137 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 138 struct csession *cse; 139 struct session_op *sop; 140 struct crypt_op *cop; 141 struct enc_xform *txform = NULL; 142 struct auth_hash *thash = NULL; 143 u_int64_t sid; 144 u_int32_t ses; 145 int error = 0; 146 147 switch (cmd) { 148 case CIOCGSESSION: 149 case CIOCGSSESSION: 150 sop = (struct session_op *)data; 151 switch (sop->cipher) { 152 case 0: 153 break; 154 case CRYPTO_DES_CBC: 155 txform = &enc_xform_des; 156 break; 157 case CRYPTO_3DES_CBC: 158 txform = &enc_xform_3des; 159 break; 160 case CRYPTO_BLF_CBC: 161 txform = &enc_xform_blf; 162 break; 163 case CRYPTO_CAST_CBC: 164 txform = &enc_xform_cast5; 165 break; 166 case CRYPTO_SKIPJACK_CBC: 167 txform = &enc_xform_skipjack; 168 break; 169 case CRYPTO_AES_CBC: 170 txform = &enc_xform_rijndael128; 171 break; 172 case CRYPTO_NULL_CBC: 173 txform = &enc_xform_null; 174 break; 175 case CRYPTO_ARC4: 176 txform = &enc_xform_arc4; 177 break; 178 default: 179 return (EINVAL); 180 } 181 182 switch (sop->mac) { 183 case 0: 184 break; 185 case CRYPTO_MD5_HMAC: 186 thash = &auth_hash_hmac_md5_96; 187 break; 188 case CRYPTO_SHA1_HMAC: 189 thash = &auth_hash_hmac_sha1_96; 190 break; 191 case CRYPTO_SHA2_HMAC: 192 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 193 thash = &auth_hash_hmac_sha2_256; 194 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 195 thash = &auth_hash_hmac_sha2_384; 196 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 197 thash = &auth_hash_hmac_sha2_512; 198 else 199 return (EINVAL); 200 break; 201 case CRYPTO_RIPEMD160_HMAC: 202 thash = &auth_hash_hmac_ripemd_160_96; 203 break; 204 #ifdef notdef 205 case CRYPTO_MD5: 206 thash = &auth_hash_md5; 207 break; 208 case CRYPTO_SHA1: 209 thash = &auth_hash_sha1; 210 break; 211 #endif 212 case CRYPTO_NULL_HMAC: 213 thash = &auth_hash_null; 214 break; 215 default: 216 return (EINVAL); 217 } 218 219 bzero(&crie, sizeof(crie)); 220 bzero(&cria, sizeof(cria)); 221 222 if (txform) { 223 crie.cri_alg = txform->type; 224 crie.cri_klen = sop->keylen * 8; 225 if (sop->keylen > txform->maxkey || 226 sop->keylen < txform->minkey) { 227 error = EINVAL; 228 goto bail; 229 } 230 231 MALLOC(crie.cri_key, u_int8_t *, 232 crie.cri_klen / 8, M_XDATA, M_WAITOK); 233 if ((error = copyin(sop->key, crie.cri_key, 234 crie.cri_klen / 8))) 235 goto bail; 236 if (thash) 237 crie.cri_next = &cria; 238 } 239 240 if (thash) { 241 cria.cri_alg = thash->type; 242 cria.cri_klen = sop->mackeylen * 8; 243 if (sop->mackeylen != thash->keysize) { 244 error = EINVAL; 245 goto bail; 246 } 247 248 if (cria.cri_klen) { 249 MALLOC(cria.cri_key, u_int8_t *, 250 cria.cri_klen / 8, M_XDATA, M_WAITOK); 251 if ((error = copyin(sop->mackey, cria.cri_key, 252 cria.cri_klen / 8))) 253 goto bail; 254 } 255 } 256 257 error = crypto_newsession(&sid, (txform ? &crie : &cria), 258 (cmd == CIOCGSESSION ? 1 : -1)); 259 if (error) 260 goto bail; 261 262 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 263 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 264 thash); 265 266 if (cse == NULL) { 267 crypto_freesession(sid); 268 error = EINVAL; 269 goto bail; 270 } 271 sop->ses = cse->ses; 272 273 bail: 274 if (error) { 275 if (crie.cri_key) 276 FREE(crie.cri_key, M_XDATA); 277 if (cria.cri_key) 278 FREE(cria.cri_key, M_XDATA); 279 } 280 break; 281 case CIOCFSESSION: 282 ses = *(u_int32_t *)data; 283 cse = csefind(fcr, ses); 284 if (cse == NULL) 285 return (EINVAL); 286 csedelete(fcr, cse); 287 error = csefree(cse); 288 break; 289 case CIOCCRYPT: 290 cop = (struct crypt_op *)data; 291 cse = csefind(fcr, cop->ses); 292 if (cse == NULL) 293 return (EINVAL); 294 error = cryptodev_op(cse, cop, active_cred, td); 295 break; 296 case CIOCKEY: 297 error = cryptodev_key((struct crypt_kop *)data); 298 break; 299 case CIOCASYMFEAT: 300 error = crypto_getfeat((int *)data); 301 break; 302 default: 303 error = EINVAL; 304 } 305 return (error); 306 } 307 308 static int cryptodev_cb(void *); 309 310 311 static int 312 cryptodev_op( 313 struct csession *cse, 314 struct crypt_op *cop, 315 struct ucred *active_cred, 316 struct thread *td) 317 { 318 struct cryptop *crp = NULL; 319 struct cryptodesc *crde = NULL, *crda = NULL; 320 int i, error; 321 322 if (cop->len > 256*1024-4) 323 return (E2BIG); 324 325 if (cse->txform && (cop->len % cse->txform->blocksize) != 0) 326 return (EINVAL); 327 328 bzero(&cse->uio, sizeof(cse->uio)); 329 cse->uio.uio_iovcnt = 1; 330 cse->uio.uio_resid = 0; 331 cse->uio.uio_segflg = UIO_SYSSPACE; 332 cse->uio.uio_rw = UIO_WRITE; 333 cse->uio.uio_td = td; 334 cse->uio.uio_iov = cse->iovec; 335 bzero(&cse->iovec, sizeof(cse->iovec)); 336 cse->uio.uio_iov[0].iov_len = cop->len; 337 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 338 for (i = 0; i < cse->uio.uio_iovcnt; i++) 339 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len; 340 341 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 342 if (crp == NULL) { 343 error = ENOMEM; 344 goto bail; 345 } 346 347 if (cse->thash) { 348 crda = crp->crp_desc; 349 if (cse->txform) 350 crde = crda->crd_next; 351 } else { 352 if (cse->txform) 353 crde = crp->crp_desc; 354 else { 355 error = EINVAL; 356 goto bail; 357 } 358 } 359 360 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 361 goto bail; 362 363 if (crda) { 364 crda->crd_skip = 0; 365 crda->crd_len = cop->len; 366 crda->crd_inject = 0; /* ??? */ 367 368 crda->crd_alg = cse->mac; 369 crda->crd_key = cse->mackey; 370 crda->crd_klen = cse->mackeylen * 8; 371 } 372 373 if (crde) { 374 if (cop->op == COP_ENCRYPT) 375 crde->crd_flags |= CRD_F_ENCRYPT; 376 else 377 crde->crd_flags &= ~CRD_F_ENCRYPT; 378 crde->crd_len = cop->len; 379 crde->crd_inject = 0; 380 381 crde->crd_alg = cse->cipher; 382 crde->crd_key = cse->key; 383 crde->crd_klen = cse->keylen * 8; 384 } 385 386 crp->crp_ilen = cop->len; 387 crp->crp_flags = CRYPTO_F_IOV; 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; 392 393 if (cop->iv) { 394 if (crde == NULL) { 395 error = EINVAL; 396 goto bail; 397 } 398 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 399 error = EINVAL; 400 goto bail; 401 } 402 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 403 goto bail; 404 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 405 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 406 crde->crd_skip = 0; 407 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 408 crde->crd_skip = 0; 409 } else if (crde) { 410 crde->crd_flags |= CRD_F_IV_PRESENT; 411 crde->crd_skip = cse->txform->blocksize; 412 crde->crd_len -= cse->txform->blocksize; 413 } 414 415 if (cop->mac) { 416 if (crda == NULL) { 417 error = EINVAL; 418 goto bail; 419 } 420 crp->crp_mac=cse->tmp_mac; 421 } 422 423 crypto_dispatch(crp); 424 error = tsleep(cse, PSOCK, "crydev", 0); 425 if (error) { 426 /* XXX can this happen? if so, how do we recover? */ 427 goto bail; 428 } 429 430 if (crp->crp_etype != 0) { 431 error = crp->crp_etype; 432 goto bail; 433 } 434 435 if (cse->error) { 436 error = cse->error; 437 goto bail; 438 } 439 440 if (cop->dst && 441 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 442 goto bail; 443 444 if (cop->mac && 445 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 446 goto bail; 447 448 bail: 449 if (crp) 450 crypto_freereq(crp); 451 if (cse->uio.uio_iov[0].iov_base) 452 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 453 454 return (error); 455 } 456 457 static int 458 cryptodev_cb(void *op) 459 { 460 struct cryptop *crp = (struct cryptop *) op; 461 struct csession *cse = (struct csession *)crp->crp_opaque; 462 463 cse->error = crp->crp_etype; 464 if (crp->crp_etype == EAGAIN) 465 return crypto_dispatch(crp); 466 wakeup(cse); 467 return (0); 468 } 469 470 static int 471 cryptodevkey_cb(void *op) 472 { 473 struct cryptkop *krp = (struct cryptkop *) op; 474 475 wakeup(krp); 476 return (0); 477 } 478 479 static int 480 cryptodev_key(struct crypt_kop *kop) 481 { 482 struct cryptkop *krp = NULL; 483 int error = EINVAL; 484 int in, out, size, i; 485 486 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 487 return (EFBIG); 488 } 489 490 in = kop->crk_iparams; 491 out = kop->crk_oparams; 492 switch (kop->crk_op) { 493 case CRK_MOD_EXP: 494 if (in == 3 && out == 1) 495 break; 496 return (EINVAL); 497 case CRK_MOD_EXP_CRT: 498 if (in == 6 && out == 1) 499 break; 500 return (EINVAL); 501 case CRK_DSA_SIGN: 502 if (in == 5 && out == 2) 503 break; 504 return (EINVAL); 505 case CRK_DSA_VERIFY: 506 if (in == 7 && out == 0) 507 break; 508 return (EINVAL); 509 case CRK_DH_COMPUTE_KEY: 510 if (in == 3 && out == 1) 511 break; 512 return (EINVAL); 513 default: 514 return (EINVAL); 515 } 516 517 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 518 if (!krp) 519 return (ENOMEM); 520 bzero(krp, sizeof *krp); 521 krp->krp_op = kop->crk_op; 522 krp->krp_status = kop->crk_status; 523 krp->krp_iparams = kop->crk_iparams; 524 krp->krp_oparams = kop->crk_oparams; 525 krp->krp_status = 0; 526 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 527 528 for (i = 0; i < CRK_MAXPARAM; i++) 529 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 530 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 531 size = (krp->krp_param[i].crp_nbits + 7) / 8; 532 if (size == 0) 533 continue; 534 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 535 if (i >= krp->krp_iparams) 536 continue; 537 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 538 if (error) 539 goto fail; 540 } 541 542 error = crypto_kdispatch(krp); 543 if (error) 544 goto fail; 545 error = tsleep(krp, PSOCK, "crydev", 0); 546 if (error) { 547 /* XXX can this happen? if so, how do we recover? */ 548 goto fail; 549 } 550 551 if (krp->krp_status != 0) { 552 error = krp->krp_status; 553 goto fail; 554 } 555 556 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 557 size = (krp->krp_param[i].crp_nbits + 7) / 8; 558 if (size == 0) 559 continue; 560 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 561 if (error) 562 goto fail; 563 } 564 565 fail: 566 if (krp) { 567 kop->crk_status = krp->krp_status; 568 for (i = 0; i < CRK_MAXPARAM; i++) { 569 if (krp->krp_param[i].crp_p) 570 FREE(krp->krp_param[i].crp_p, M_XDATA); 571 } 572 free(krp, M_XDATA); 573 } 574 return (error); 575 } 576 577 /* ARGSUSED */ 578 static int 579 cryptof_poll( 580 struct file *fp, 581 int events, 582 struct ucred *active_cred, 583 struct thread *td) 584 { 585 586 return (0); 587 } 588 589 /* ARGSUSED */ 590 static int 591 cryptof_kqfilter(struct file *fp, struct knote *kn) 592 { 593 594 return (0); 595 } 596 597 /* ARGSUSED */ 598 static int 599 cryptof_stat( 600 struct file *fp, 601 struct stat *sb, 602 struct ucred *active_cred, 603 struct thread *td) 604 { 605 606 return (EOPNOTSUPP); 607 } 608 609 /* ARGSUSED */ 610 static int 611 cryptof_close(struct file *fp, struct thread *td) 612 { 613 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 614 struct csession *cse; 615 616 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 617 TAILQ_REMOVE(&fcr->csessions, cse, next); 618 (void)csefree(cse); 619 } 620 FREE(fcr, M_XDATA); 621 fp->f_data = NULL; 622 return 0; 623 } 624 625 static struct csession * 626 csefind(struct fcrypt *fcr, u_int ses) 627 { 628 struct csession *cse; 629 630 TAILQ_FOREACH(cse, &fcr->csessions, next) 631 if (cse->ses == ses) 632 return (cse); 633 return (NULL); 634 } 635 636 static int 637 csedelete(struct fcrypt *fcr, struct csession *cse_del) 638 { 639 struct csession *cse; 640 641 TAILQ_FOREACH(cse, &fcr->csessions, next) { 642 if (cse == cse_del) { 643 TAILQ_REMOVE(&fcr->csessions, cse, next); 644 return (1); 645 } 646 } 647 return (0); 648 } 649 650 static struct csession * 651 cseadd(struct fcrypt *fcr, struct csession *cse) 652 { 653 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 654 cse->ses = fcr->sesn++; 655 return (cse); 656 } 657 658 struct csession * 659 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 660 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 661 struct enc_xform *txform, struct auth_hash *thash) 662 { 663 struct csession *cse; 664 665 MALLOC(cse, struct csession *, sizeof(struct csession), 666 M_XDATA, M_NOWAIT); 667 if (cse == NULL) 668 return NULL; 669 cse->key = key; 670 cse->keylen = keylen/8; 671 cse->mackey = mackey; 672 cse->mackeylen = mackeylen/8; 673 cse->sid = sid; 674 cse->cipher = cipher; 675 cse->mac = mac; 676 cse->txform = txform; 677 cse->thash = thash; 678 cseadd(fcr, cse); 679 return (cse); 680 } 681 682 static int 683 csefree(struct csession *cse) 684 { 685 int error; 686 687 error = crypto_freesession(cse->sid); 688 if (cse->key) 689 FREE(cse->key, M_XDATA); 690 if (cse->mackey) 691 FREE(cse->mackey, M_XDATA); 692 FREE(cse, M_XDATA); 693 return (error); 694 } 695 696 static int 697 cryptoopen(dev_t dev, int oflags, int devtype, struct thread *td) 698 { 699 if (crypto_usercrypto == 0) 700 return (ENXIO); 701 return (0); 702 } 703 704 static int 705 cryptoread(dev_t dev, struct uio *uio, int ioflag) 706 { 707 return (EIO); 708 } 709 710 static int 711 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 712 { 713 return (EIO); 714 } 715 716 static int 717 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 718 { 719 struct file *f; 720 struct fcrypt *fcr; 721 int fd, error; 722 723 switch (cmd) { 724 case CRIOGET: 725 MALLOC(fcr, struct fcrypt *, 726 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 727 TAILQ_INIT(&fcr->csessions); 728 fcr->sesn = 0; 729 730 error = falloc(td, &f, &fd); 731 732 if (error) { 733 FREE(fcr, M_XDATA); 734 return (error); 735 } 736 fhold(f); 737 f->f_flag = FREAD | FWRITE; 738 f->f_type = DTYPE_CRYPTO; 739 f->f_ops = &cryptofops; 740 f->f_data = (caddr_t) fcr; 741 *(u_int32_t *)data = fd; 742 fdrop(f, td); 743 break; 744 default: 745 error = EINVAL; 746 break; 747 } 748 return (error); 749 } 750 751 #define CRYPTO_MAJOR 70 /* from openbsd */ 752 static struct cdevsw crypto_cdevsw = { 753 /* open */ cryptoopen, 754 /* close */ nullclose, 755 /* read */ cryptoread, 756 /* write */ cryptowrite, 757 /* ioctl */ cryptoioctl, 758 /* poll */ nopoll, 759 /* mmap */ nommap, 760 /* strategy */ nostrategy, 761 /* dev name */ "crypto", 762 /* dev major */ CRYPTO_MAJOR, 763 /* dump */ nodump, 764 /* psize */ nopsize, 765 /* flags */ 0, 766 /* kqfilter */ NULL 767 }; 768 static dev_t crypto_dev; 769 770 /* 771 * Initialization code, both for static and dynamic loading. 772 */ 773 static int 774 cryptodev_modevent(module_t mod, int type, void *unused) 775 { 776 switch (type) { 777 case MOD_LOAD: 778 if (bootverbose) 779 printf("crypto: <crypto device>\n"); 780 crypto_dev = make_dev(&crypto_cdevsw, CRYPTO_MAJOR, 781 UID_ROOT, GID_WHEEL, 0666, 782 "crypto"); 783 return 0; 784 case MOD_UNLOAD: 785 /*XXX disallow if active sessions */ 786 destroy_dev(crypto_dev); 787 return 0; 788 } 789 return EINVAL; 790 } 791 792 static moduledata_t cryptodev_mod = { 793 "cryptodev", 794 cryptodev_modevent, 795 0 796 }; 797 MODULE_VERSION(cryptodev, 1); 798 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 799