Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/opencrypto/cryptodev.c
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1 /* $FreeBSD: releng/5.0/sys/opencrypto/cryptodev.c 108900 2003-01-07 21:45:24Z sam $ */ 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 sop = (struct session_op *)data; 150 switch (sop->cipher) { 151 case 0: 152 break; 153 case CRYPTO_DES_CBC: 154 txform = &enc_xform_des; 155 break; 156 case CRYPTO_3DES_CBC: 157 txform = &enc_xform_3des; 158 break; 159 case CRYPTO_BLF_CBC: 160 txform = &enc_xform_blf; 161 break; 162 case CRYPTO_CAST_CBC: 163 txform = &enc_xform_cast5; 164 break; 165 case CRYPTO_SKIPJACK_CBC: 166 txform = &enc_xform_skipjack; 167 break; 168 case CRYPTO_AES_CBC: 169 txform = &enc_xform_rijndael128; 170 break; 171 case CRYPTO_NULL_CBC: 172 txform = &enc_xform_null; 173 break; 174 case CRYPTO_ARC4: 175 txform = &enc_xform_arc4; 176 break; 177 default: 178 return (EINVAL); 179 } 180 181 switch (sop->mac) { 182 case 0: 183 break; 184 case CRYPTO_MD5_HMAC: 185 thash = &auth_hash_hmac_md5_96; 186 break; 187 case CRYPTO_SHA1_HMAC: 188 thash = &auth_hash_hmac_sha1_96; 189 break; 190 case CRYPTO_SHA2_HMAC: 191 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 192 thash = &auth_hash_hmac_sha2_256; 193 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 194 thash = &auth_hash_hmac_sha2_384; 195 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 196 thash = &auth_hash_hmac_sha2_512; 197 else 198 return (EINVAL); 199 break; 200 case CRYPTO_RIPEMD160_HMAC: 201 thash = &auth_hash_hmac_ripemd_160_96; 202 break; 203 #ifdef notdef 204 case CRYPTO_MD5: 205 thash = &auth_hash_md5; 206 break; 207 case CRYPTO_SHA1: 208 thash = &auth_hash_sha1; 209 break; 210 #endif 211 case CRYPTO_NULL_HMAC: 212 thash = &auth_hash_null; 213 break; 214 default: 215 return (EINVAL); 216 } 217 218 bzero(&crie, sizeof(crie)); 219 bzero(&cria, sizeof(cria)); 220 221 if (txform) { 222 crie.cri_alg = txform->type; 223 crie.cri_klen = sop->keylen * 8; 224 if (sop->keylen > txform->maxkey || 225 sop->keylen < txform->minkey) { 226 error = EINVAL; 227 goto bail; 228 } 229 230 MALLOC(crie.cri_key, u_int8_t *, 231 crie.cri_klen / 8, M_XDATA, M_WAITOK); 232 if ((error = copyin(sop->key, crie.cri_key, 233 crie.cri_klen / 8))) 234 goto bail; 235 if (thash) 236 crie.cri_next = &cria; 237 } 238 239 if (thash) { 240 cria.cri_alg = thash->type; 241 cria.cri_klen = sop->mackeylen * 8; 242 if (sop->mackeylen != thash->keysize) { 243 error = EINVAL; 244 goto bail; 245 } 246 247 if (cria.cri_klen) { 248 MALLOC(cria.cri_key, u_int8_t *, 249 cria.cri_klen / 8, M_XDATA, M_WAITOK); 250 if ((error = copyin(sop->mackey, cria.cri_key, 251 cria.cri_klen / 8))) 252 goto bail; 253 } 254 } 255 256 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1); 257 if (error) 258 goto bail; 259 260 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 261 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 262 thash); 263 264 if (cse == NULL) { 265 crypto_freesession(sid); 266 error = EINVAL; 267 goto bail; 268 } 269 sop->ses = cse->ses; 270 271 bail: 272 if (error) { 273 if (crie.cri_key) 274 FREE(crie.cri_key, M_XDATA); 275 if (cria.cri_key) 276 FREE(cria.cri_key, M_XDATA); 277 } 278 break; 279 case CIOCFSESSION: 280 ses = *(u_int32_t *)data; 281 cse = csefind(fcr, ses); 282 if (cse == NULL) 283 return (EINVAL); 284 csedelete(fcr, cse); 285 error = csefree(cse); 286 break; 287 case CIOCCRYPT: 288 cop = (struct crypt_op *)data; 289 cse = csefind(fcr, cop->ses); 290 if (cse == NULL) 291 return (EINVAL); 292 error = cryptodev_op(cse, cop, active_cred, td); 293 break; 294 case CIOCKEY: 295 error = cryptodev_key((struct crypt_kop *)data); 296 break; 297 case CIOCASYMFEAT: 298 error = crypto_getfeat((int *)data); 299 break; 300 default: 301 error = EINVAL; 302 } 303 return (error); 304 } 305 306 static int cryptodev_cb(void *); 307 308 309 static int 310 cryptodev_op( 311 struct csession *cse, 312 struct crypt_op *cop, 313 struct ucred *active_cred, 314 struct thread *td) 315 { 316 struct cryptop *crp = NULL; 317 struct cryptodesc *crde = NULL, *crda = NULL; 318 int i, error; 319 320 if (cop->len > 256*1024-4) 321 return (E2BIG); 322 323 if (cse->txform && (cop->len % cse->txform->blocksize) != 0) 324 return (EINVAL); 325 326 bzero(&cse->uio, sizeof(cse->uio)); 327 cse->uio.uio_iovcnt = 1; 328 cse->uio.uio_resid = 0; 329 cse->uio.uio_segflg = UIO_SYSSPACE; 330 cse->uio.uio_rw = UIO_WRITE; 331 cse->uio.uio_td = td; 332 cse->uio.uio_iov = cse->iovec; 333 bzero(&cse->iovec, sizeof(cse->iovec)); 334 cse->uio.uio_iov[0].iov_len = cop->len; 335 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 336 for (i = 0; i < cse->uio.uio_iovcnt; i++) 337 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len; 338 339 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 340 if (crp == NULL) { 341 error = ENOMEM; 342 goto bail; 343 } 344 345 if (cse->thash) { 346 crda = crp->crp_desc; 347 if (cse->txform) 348 crde = crda->crd_next; 349 } else { 350 if (cse->txform) 351 crde = crp->crp_desc; 352 else { 353 error = EINVAL; 354 goto bail; 355 } 356 } 357 358 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 359 goto bail; 360 361 if (crda) { 362 crda->crd_skip = 0; 363 crda->crd_len = cop->len; 364 crda->crd_inject = 0; /* ??? */ 365 366 crda->crd_alg = cse->mac; 367 crda->crd_key = cse->mackey; 368 crda->crd_klen = cse->mackeylen * 8; 369 } 370 371 if (crde) { 372 if (cop->op == COP_ENCRYPT) 373 crde->crd_flags |= CRD_F_ENCRYPT; 374 else 375 crde->crd_flags &= ~CRD_F_ENCRYPT; 376 crde->crd_len = cop->len; 377 crde->crd_inject = 0; 378 379 crde->crd_alg = cse->cipher; 380 crde->crd_key = cse->key; 381 crde->crd_klen = cse->keylen * 8; 382 } 383 384 crp->crp_ilen = cop->len; 385 crp->crp_flags = CRYPTO_F_IOV; 386 crp->crp_buf = (caddr_t)&cse->uio; 387 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 388 crp->crp_sid = cse->sid; 389 crp->crp_opaque = (void *)cse; 390 391 if (cop->iv) { 392 if (crde == NULL) { 393 error = EINVAL; 394 goto bail; 395 } 396 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 397 error = EINVAL; 398 goto bail; 399 } 400 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 401 goto bail; 402 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 403 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 404 crde->crd_skip = 0; 405 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 406 crde->crd_skip = 0; 407 } else if (crde) { 408 crde->crd_flags |= CRD_F_IV_PRESENT; 409 crde->crd_skip = cse->txform->blocksize; 410 crde->crd_len -= cse->txform->blocksize; 411 } 412 413 if (cop->mac) { 414 if (crda == NULL) { 415 error = EINVAL; 416 goto bail; 417 } 418 crp->crp_mac=cse->tmp_mac; 419 } 420 421 crypto_dispatch(crp); 422 error = tsleep(cse, PSOCK, "crydev", 0); 423 if (error) { 424 /* XXX can this happen? if so, how do we recover? */ 425 goto bail; 426 } 427 428 if (crp->crp_etype != 0) { 429 error = crp->crp_etype; 430 goto bail; 431 } 432 433 if (cse->error) { 434 error = cse->error; 435 goto bail; 436 } 437 438 if (cop->dst && 439 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 440 goto bail; 441 442 if (cop->mac && 443 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 444 goto bail; 445 446 bail: 447 if (crp) 448 crypto_freereq(crp); 449 if (cse->uio.uio_iov[0].iov_base) 450 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 451 452 return (error); 453 } 454 455 static int 456 cryptodev_cb(void *op) 457 { 458 struct cryptop *crp = (struct cryptop *) op; 459 struct csession *cse = (struct csession *)crp->crp_opaque; 460 461 cse->error = crp->crp_etype; 462 if (crp->crp_etype == EAGAIN) 463 return crypto_dispatch(crp); 464 wakeup(cse); 465 return (0); 466 } 467 468 static int 469 cryptodevkey_cb(void *op) 470 { 471 struct cryptkop *krp = (struct cryptkop *) op; 472 473 wakeup(krp); 474 return (0); 475 } 476 477 static int 478 cryptodev_key(struct crypt_kop *kop) 479 { 480 struct cryptkop *krp = NULL; 481 int error = EINVAL; 482 int in, out, size, i; 483 484 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 485 return (EFBIG); 486 } 487 488 in = kop->crk_iparams; 489 out = kop->crk_oparams; 490 switch (kop->crk_op) { 491 case CRK_MOD_EXP: 492 if (in == 3 && out == 1) 493 break; 494 return (EINVAL); 495 case CRK_MOD_EXP_CRT: 496 if (in == 6 && out == 1) 497 break; 498 return (EINVAL); 499 case CRK_DSA_SIGN: 500 if (in == 5 && out == 2) 501 break; 502 return (EINVAL); 503 case CRK_DSA_VERIFY: 504 if (in == 7 && out == 0) 505 break; 506 return (EINVAL); 507 case CRK_DH_COMPUTE_KEY: 508 if (in == 3 && out == 1) 509 break; 510 return (EINVAL); 511 default: 512 return (EINVAL); 513 } 514 515 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 516 if (!krp) 517 return (ENOMEM); 518 bzero(krp, sizeof *krp); 519 krp->krp_op = kop->crk_op; 520 krp->krp_status = kop->crk_status; 521 krp->krp_iparams = kop->crk_iparams; 522 krp->krp_oparams = kop->crk_oparams; 523 krp->krp_status = 0; 524 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 525 526 for (i = 0; i < CRK_MAXPARAM; i++) 527 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 528 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 529 size = (krp->krp_param[i].crp_nbits + 7) / 8; 530 if (size == 0) 531 continue; 532 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 533 if (i >= krp->krp_iparams) 534 continue; 535 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 536 if (error) 537 goto fail; 538 } 539 540 error = crypto_kdispatch(krp); 541 if (error) 542 goto fail; 543 error = tsleep(krp, PSOCK, "crydev", 0); 544 if (error) { 545 /* XXX can this happen? if so, how do we recover? */ 546 goto fail; 547 } 548 549 if (krp->krp_status != 0) { 550 error = krp->krp_status; 551 goto fail; 552 } 553 554 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 555 size = (krp->krp_param[i].crp_nbits + 7) / 8; 556 if (size == 0) 557 continue; 558 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 559 if (error) 560 goto fail; 561 } 562 563 fail: 564 if (krp) { 565 kop->crk_status = krp->krp_status; 566 for (i = 0; i < CRK_MAXPARAM; i++) { 567 if (krp->krp_param[i].crp_p) 568 FREE(krp->krp_param[i].crp_p, M_XDATA); 569 } 570 free(krp, M_XDATA); 571 } 572 return (error); 573 } 574 575 /* ARGSUSED */ 576 static int 577 cryptof_poll( 578 struct file *fp, 579 int events, 580 struct ucred *active_cred, 581 struct thread *td) 582 { 583 584 return (0); 585 } 586 587 /* ARGSUSED */ 588 static int 589 cryptof_kqfilter(struct file *fp, struct knote *kn) 590 { 591 592 return (0); 593 } 594 595 /* ARGSUSED */ 596 static int 597 cryptof_stat( 598 struct file *fp, 599 struct stat *sb, 600 struct ucred *active_cred, 601 struct thread *td) 602 { 603 604 return (EOPNOTSUPP); 605 } 606 607 /* ARGSUSED */ 608 static int 609 cryptof_close(struct file *fp, struct thread *td) 610 { 611 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 612 struct csession *cse; 613 614 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 615 TAILQ_REMOVE(&fcr->csessions, cse, next); 616 (void)csefree(cse); 617 } 618 FREE(fcr, M_XDATA); 619 fp->f_data = NULL; 620 return 0; 621 } 622 623 static struct csession * 624 csefind(struct fcrypt *fcr, u_int ses) 625 { 626 struct csession *cse; 627 628 TAILQ_FOREACH(cse, &fcr->csessions, next) 629 if (cse->ses == ses) 630 return (cse); 631 return (NULL); 632 } 633 634 static int 635 csedelete(struct fcrypt *fcr, struct csession *cse_del) 636 { 637 struct csession *cse; 638 639 TAILQ_FOREACH(cse, &fcr->csessions, next) { 640 if (cse == cse_del) { 641 TAILQ_REMOVE(&fcr->csessions, cse, next); 642 return (1); 643 } 644 } 645 return (0); 646 } 647 648 static struct csession * 649 cseadd(struct fcrypt *fcr, struct csession *cse) 650 { 651 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 652 cse->ses = fcr->sesn++; 653 return (cse); 654 } 655 656 struct csession * 657 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 658 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 659 struct enc_xform *txform, struct auth_hash *thash) 660 { 661 struct csession *cse; 662 663 MALLOC(cse, struct csession *, sizeof(struct csession), 664 M_XDATA, M_NOWAIT); 665 if (cse == NULL) 666 return NULL; 667 cse->key = key; 668 cse->keylen = keylen/8; 669 cse->mackey = mackey; 670 cse->mackeylen = mackeylen/8; 671 cse->sid = sid; 672 cse->cipher = cipher; 673 cse->mac = mac; 674 cse->txform = txform; 675 cse->thash = thash; 676 cseadd(fcr, cse); 677 return (cse); 678 } 679 680 static int 681 csefree(struct csession *cse) 682 { 683 int error; 684 685 error = crypto_freesession(cse->sid); 686 if (cse->key) 687 FREE(cse->key, M_XDATA); 688 if (cse->mackey) 689 FREE(cse->mackey, M_XDATA); 690 FREE(cse, M_XDATA); 691 return (error); 692 } 693 694 static int 695 cryptoopen(dev_t dev, int oflags, int devtype, struct thread *td) 696 { 697 return (0); 698 } 699 700 static int 701 cryptoread(dev_t dev, struct uio *uio, int ioflag) 702 { 703 return (EIO); 704 } 705 706 static int 707 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 708 { 709 return (EIO); 710 } 711 712 static int 713 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 714 { 715 struct file *f; 716 struct fcrypt *fcr; 717 int fd, error; 718 719 switch (cmd) { 720 case CRIOGET: 721 MALLOC(fcr, struct fcrypt *, 722 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 723 TAILQ_INIT(&fcr->csessions); 724 fcr->sesn = 0; 725 726 error = falloc(td, &f, &fd); 727 728 if (error) { 729 FREE(fcr, M_XDATA); 730 return (error); 731 } 732 fhold(f); 733 f->f_flag = FREAD | FWRITE; 734 f->f_type = DTYPE_CRYPTO; 735 f->f_ops = &cryptofops; 736 f->f_data = (caddr_t) fcr; 737 *(u_int32_t *)data = fd; 738 fdrop(f, td); 739 break; 740 default: 741 error = EINVAL; 742 break; 743 } 744 return (error); 745 } 746 747 #define CRYPTO_MAJOR 70 /* from openbsd */ 748 static struct cdevsw crypto_cdevsw = { 749 /* open */ cryptoopen, 750 /* close */ nullclose, 751 /* read */ cryptoread, 752 /* write */ cryptowrite, 753 /* ioctl */ cryptoioctl, 754 /* poll */ nopoll, 755 /* mmap */ nommap, 756 /* strategy */ nostrategy, 757 /* dev name */ "crypto", 758 /* dev major */ CRYPTO_MAJOR, 759 /* dump */ nodump, 760 /* psize */ nopsize, 761 /* flags */ 0, 762 /* kqfilter */ NULL 763 }; 764 static dev_t crypto_dev; 765 766 /* 767 * Initialization code, both for static and dynamic loading. 768 */ 769 static int 770 cryptodev_modevent(module_t mod, int type, void *unused) 771 { 772 switch (type) { 773 case MOD_LOAD: 774 if (bootverbose) 775 printf("crypto: <crypto device>\n"); 776 crypto_dev = make_dev(&crypto_cdevsw, 0, 777 UID_ROOT, GID_WHEEL, 0666, 778 "crypto"); 779 return 0; 780 case MOD_UNLOAD: 781 /*XXX disallow if active sessions */ 782 destroy_dev(crypto_dev); 783 return 0; 784 } 785 return EINVAL; 786 } 787 788 static moduledata_t cryptodev_mod = { 789 "cryptodev", 790 cryptodev_modevent, 791 0 792 }; 793 MODULE_VERSION(cryptodev, 1); 794 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 795 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
Cache object: 2db86d77cb101a71d0205ffd1038a6ce
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