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/5.1/sys/opencrypto/cryptodev.c 111815 2003-03-03 12:15:54Z phk $ */ 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 = 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 | CRYPTO_F_CBIMM 386 | (cop->flags & COP_F_BATCH); 387 crp->crp_buf = (caddr_t)&cse->uio; 388 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 389 crp->crp_sid = cse->sid; 390 crp->crp_opaque = (void *)cse; 391 392 if (cop->iv) { 393 if (crde == NULL) { 394 error = EINVAL; 395 goto bail; 396 } 397 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 398 error = EINVAL; 399 goto bail; 400 } 401 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 402 goto bail; 403 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 404 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 405 crde->crd_skip = 0; 406 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 407 crde->crd_skip = 0; 408 } else if (crde) { 409 crde->crd_flags |= CRD_F_IV_PRESENT; 410 crde->crd_skip = cse->txform->blocksize; 411 crde->crd_len -= cse->txform->blocksize; 412 } 413 414 if (cop->mac) { 415 if (crda == NULL) { 416 error = EINVAL; 417 goto bail; 418 } 419 crp->crp_mac=cse->tmp_mac; 420 } 421 422 crypto_dispatch(crp); 423 error = tsleep(cse, PSOCK, "crydev", 0); 424 if (error) { 425 /* XXX can this happen? if so, how do we recover? */ 426 goto bail; 427 } 428 429 if (crp->crp_etype != 0) { 430 error = crp->crp_etype; 431 goto bail; 432 } 433 434 if (cse->error) { 435 error = cse->error; 436 goto bail; 437 } 438 439 if (cop->dst && 440 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 441 goto bail; 442 443 if (cop->mac && 444 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 445 goto bail; 446 447 bail: 448 if (crp) 449 crypto_freereq(crp); 450 if (cse->uio.uio_iov[0].iov_base) 451 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 452 453 return (error); 454 } 455 456 static int 457 cryptodev_cb(void *op) 458 { 459 struct cryptop *crp = (struct cryptop *) op; 460 struct csession *cse = (struct csession *)crp->crp_opaque; 461 462 cse->error = crp->crp_etype; 463 if (crp->crp_etype == EAGAIN) 464 return crypto_dispatch(crp); 465 wakeup(cse); 466 return (0); 467 } 468 469 static int 470 cryptodevkey_cb(void *op) 471 { 472 struct cryptkop *krp = (struct cryptkop *) op; 473 474 wakeup(krp); 475 return (0); 476 } 477 478 static int 479 cryptodev_key(struct crypt_kop *kop) 480 { 481 struct cryptkop *krp = NULL; 482 int error = EINVAL; 483 int in, out, size, i; 484 485 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 486 return (EFBIG); 487 } 488 489 in = kop->crk_iparams; 490 out = kop->crk_oparams; 491 switch (kop->crk_op) { 492 case CRK_MOD_EXP: 493 if (in == 3 && out == 1) 494 break; 495 return (EINVAL); 496 case CRK_MOD_EXP_CRT: 497 if (in == 6 && out == 1) 498 break; 499 return (EINVAL); 500 case CRK_DSA_SIGN: 501 if (in == 5 && out == 2) 502 break; 503 return (EINVAL); 504 case CRK_DSA_VERIFY: 505 if (in == 7 && out == 0) 506 break; 507 return (EINVAL); 508 case CRK_DH_COMPUTE_KEY: 509 if (in == 3 && out == 1) 510 break; 511 return (EINVAL); 512 default: 513 return (EINVAL); 514 } 515 516 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 517 if (!krp) 518 return (ENOMEM); 519 bzero(krp, sizeof *krp); 520 krp->krp_op = kop->crk_op; 521 krp->krp_status = kop->crk_status; 522 krp->krp_iparams = kop->crk_iparams; 523 krp->krp_oparams = kop->crk_oparams; 524 krp->krp_status = 0; 525 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 526 527 for (i = 0; i < CRK_MAXPARAM; i++) 528 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 529 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 530 size = (krp->krp_param[i].crp_nbits + 7) / 8; 531 if (size == 0) 532 continue; 533 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 534 if (i >= krp->krp_iparams) 535 continue; 536 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 537 if (error) 538 goto fail; 539 } 540 541 error = crypto_kdispatch(krp); 542 if (error) 543 goto fail; 544 error = tsleep(krp, PSOCK, "crydev", 0); 545 if (error) { 546 /* XXX can this happen? if so, how do we recover? */ 547 goto fail; 548 } 549 550 if (krp->krp_status != 0) { 551 error = krp->krp_status; 552 goto fail; 553 } 554 555 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 556 size = (krp->krp_param[i].crp_nbits + 7) / 8; 557 if (size == 0) 558 continue; 559 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 560 if (error) 561 goto fail; 562 } 563 564 fail: 565 if (krp) { 566 kop->crk_status = krp->krp_status; 567 for (i = 0; i < CRK_MAXPARAM; i++) { 568 if (krp->krp_param[i].crp_p) 569 FREE(krp->krp_param[i].crp_p, M_XDATA); 570 } 571 free(krp, M_XDATA); 572 } 573 return (error); 574 } 575 576 /* ARGSUSED */ 577 static int 578 cryptof_poll( 579 struct file *fp, 580 int events, 581 struct ucred *active_cred, 582 struct thread *td) 583 { 584 585 return (0); 586 } 587 588 /* ARGSUSED */ 589 static int 590 cryptof_kqfilter(struct file *fp, struct knote *kn) 591 { 592 593 return (0); 594 } 595 596 /* ARGSUSED */ 597 static int 598 cryptof_stat( 599 struct file *fp, 600 struct stat *sb, 601 struct ucred *active_cred, 602 struct thread *td) 603 { 604 605 return (EOPNOTSUPP); 606 } 607 608 /* ARGSUSED */ 609 static int 610 cryptof_close(struct file *fp, struct thread *td) 611 { 612 struct fcrypt *fcr = fp->f_data; 613 struct csession *cse; 614 615 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 616 TAILQ_REMOVE(&fcr->csessions, cse, next); 617 (void)csefree(cse); 618 } 619 FREE(fcr, M_XDATA); 620 fp->f_data = NULL; 621 return 0; 622 } 623 624 static struct csession * 625 csefind(struct fcrypt *fcr, u_int ses) 626 { 627 struct csession *cse; 628 629 TAILQ_FOREACH(cse, &fcr->csessions, next) 630 if (cse->ses == ses) 631 return (cse); 632 return (NULL); 633 } 634 635 static int 636 csedelete(struct fcrypt *fcr, struct csession *cse_del) 637 { 638 struct csession *cse; 639 640 TAILQ_FOREACH(cse, &fcr->csessions, next) { 641 if (cse == cse_del) { 642 TAILQ_REMOVE(&fcr->csessions, cse, next); 643 return (1); 644 } 645 } 646 return (0); 647 } 648 649 static struct csession * 650 cseadd(struct fcrypt *fcr, struct csession *cse) 651 { 652 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 653 cse->ses = fcr->sesn++; 654 return (cse); 655 } 656 657 struct csession * 658 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 659 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 660 struct enc_xform *txform, struct auth_hash *thash) 661 { 662 struct csession *cse; 663 664 MALLOC(cse, struct csession *, sizeof(struct csession), 665 M_XDATA, M_NOWAIT); 666 if (cse == NULL) 667 return NULL; 668 cse->key = key; 669 cse->keylen = keylen/8; 670 cse->mackey = mackey; 671 cse->mackeylen = mackeylen/8; 672 cse->sid = sid; 673 cse->cipher = cipher; 674 cse->mac = mac; 675 cse->txform = txform; 676 cse->thash = thash; 677 cseadd(fcr, cse); 678 return (cse); 679 } 680 681 static int 682 csefree(struct csession *cse) 683 { 684 int error; 685 686 error = crypto_freesession(cse->sid); 687 if (cse->key) 688 FREE(cse->key, M_XDATA); 689 if (cse->mackey) 690 FREE(cse->mackey, M_XDATA); 691 FREE(cse, M_XDATA); 692 return (error); 693 } 694 695 static int 696 cryptoopen(dev_t dev, int oflags, int devtype, struct thread *td) 697 { 698 return (0); 699 } 700 701 static int 702 cryptoread(dev_t dev, struct uio *uio, int ioflag) 703 { 704 return (EIO); 705 } 706 707 static int 708 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 709 { 710 return (EIO); 711 } 712 713 static int 714 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 715 { 716 struct file *f; 717 struct fcrypt *fcr; 718 int fd, error; 719 720 switch (cmd) { 721 case CRIOGET: 722 MALLOC(fcr, struct fcrypt *, 723 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 724 TAILQ_INIT(&fcr->csessions); 725 fcr->sesn = 0; 726 727 error = falloc(td, &f, &fd); 728 729 if (error) { 730 FREE(fcr, M_XDATA); 731 return (error); 732 } 733 fhold(f); 734 f->f_flag = FREAD | FWRITE; 735 f->f_type = DTYPE_CRYPTO; 736 f->f_ops = &cryptofops; 737 f->f_data = fcr; 738 *(u_int32_t *)data = fd; 739 fdrop(f, td); 740 break; 741 default: 742 error = EINVAL; 743 break; 744 } 745 return (error); 746 } 747 748 #define CRYPTO_MAJOR 70 /* from openbsd */ 749 static struct cdevsw crypto_cdevsw = { 750 .d_open = cryptoopen, 751 .d_close = nullclose, 752 .d_read = cryptoread, 753 .d_write = cryptowrite, 754 .d_ioctl = cryptoioctl, 755 .d_name = "crypto", 756 .d_maj = CRYPTO_MAJOR, 757 }; 758 static dev_t crypto_dev; 759 760 /* 761 * Initialization code, both for static and dynamic loading. 762 */ 763 static int 764 cryptodev_modevent(module_t mod, int type, void *unused) 765 { 766 switch (type) { 767 case MOD_LOAD: 768 if (bootverbose) 769 printf("crypto: <crypto device>\n"); 770 crypto_dev = make_dev(&crypto_cdevsw, 0, 771 UID_ROOT, GID_WHEEL, 0666, 772 "crypto"); 773 return 0; 774 case MOD_UNLOAD: 775 /*XXX disallow if active sessions */ 776 destroy_dev(crypto_dev); 777 return 0; 778 } 779 return EINVAL; 780 } 781 782 static moduledata_t cryptodev_mod = { 783 "cryptodev", 784 cryptodev_modevent, 785 0 786 }; 787 MODULE_VERSION(cryptodev, 1); 788 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 789 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
Cache object: 9c202a5321fd03264346bf0d34c43eec
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