cryptodev.c revision 121256
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 121256 2003-10-19 20:41:07Z dwmalone $"); 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/fcntl.h> 52 53#include <opencrypto/cryptodev.h> 54#include <opencrypto/xform.h> 55 56struct csession { 57 TAILQ_ENTRY(csession) next; 58 u_int64_t sid; 59 u_int32_t ses; 60 struct mtx lock; /* for op submission */ 61 62 u_int32_t cipher; 63 struct enc_xform *txform; 64 u_int32_t mac; 65 struct auth_hash *thash; 66 67 caddr_t key; 68 int keylen; 69 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 70 71 caddr_t mackey; 72 int mackeylen; 73 u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; 74 75 struct iovec iovec[UIO_MAXIOV]; 76 struct uio uio; 77 int error; 78}; 79 80struct fcrypt { 81 TAILQ_HEAD(csessionlist, csession) csessions; 82 int sesn; 83}; 84 85static int cryptof_rw(struct file *fp, struct uio *uio, 86 struct ucred *cred, int flags, struct thread *); 87static int cryptof_ioctl(struct file *, u_long, void *, 88 struct ucred *, struct thread *); 89static int cryptof_poll(struct file *, int, struct ucred *, struct thread *); 90static int cryptof_kqfilter(struct file *, struct knote *); 91static int cryptof_stat(struct file *, struct stat *, 92 struct ucred *, struct thread *); 93static int cryptof_close(struct file *, struct thread *); 94 95static struct fileops cryptofops = { 96 .fo_read = cryptof_rw, 97 .fo_write = cryptof_rw, 98 .fo_ioctl = cryptof_ioctl, 99 .fo_poll = cryptof_poll, 100 .fo_kqfilter = cryptof_kqfilter, 101 .fo_stat = cryptof_stat, 102 .fo_close = cryptof_close 103}; 104 105static struct csession *csefind(struct fcrypt *, u_int); 106static int csedelete(struct fcrypt *, struct csession *); 107static struct csession *cseadd(struct fcrypt *, struct csession *); 108static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, 109 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 110 struct auth_hash *); 111static int csefree(struct csession *); 112 113static int cryptodev_op(struct csession *, struct crypt_op *, 114 struct ucred *, struct thread *td); 115static int cryptodev_key(struct crypt_kop *); 116 117static int 118cryptof_rw( 119 struct file *fp, 120 struct uio *uio, 121 struct ucred *active_cred, 122 int flags, 123 struct thread *td) 124{ 125 126 return (EIO); 127} 128 129/* ARGSUSED */ 130static int 131cryptof_ioctl( 132 struct file *fp, 133 u_long cmd, 134 void *data, 135 struct ucred *active_cred, 136 struct thread *td) 137{ 138 struct cryptoini cria, crie; 139 struct fcrypt *fcr = fp->f_data; 140 struct csession *cse; 141 struct session_op *sop; 142 struct crypt_op *cop; 143 struct enc_xform *txform = NULL; 144 struct auth_hash *thash = NULL; 145 u_int64_t sid; 146 u_int32_t ses; 147 int error = 0; 148 149 switch (cmd) { 150 case CIOCGSESSION: 151 sop = (struct session_op *)data; 152 switch (sop->cipher) { 153 case 0: 154 break; 155 case CRYPTO_DES_CBC: 156 txform = &enc_xform_des; 157 break; 158 case CRYPTO_3DES_CBC: 159 txform = &enc_xform_3des; 160 break; 161 case CRYPTO_BLF_CBC: 162 txform = &enc_xform_blf; 163 break; 164 case CRYPTO_CAST_CBC: 165 txform = &enc_xform_cast5; 166 break; 167 case CRYPTO_SKIPJACK_CBC: 168 txform = &enc_xform_skipjack; 169 break; 170 case CRYPTO_AES_CBC: 171 txform = &enc_xform_rijndael128; 172 break; 173 case CRYPTO_NULL_CBC: 174 txform = &enc_xform_null; 175 break; 176 case CRYPTO_ARC4: 177 txform = &enc_xform_arc4; 178 break; 179 default: 180 return (EINVAL); 181 } 182 183 switch (sop->mac) { 184 case 0: 185 break; 186 case CRYPTO_MD5_HMAC: 187 thash = &auth_hash_hmac_md5_96; 188 break; 189 case CRYPTO_SHA1_HMAC: 190 thash = &auth_hash_hmac_sha1_96; 191 break; 192 case CRYPTO_SHA2_HMAC: 193 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 194 thash = &auth_hash_hmac_sha2_256; 195 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 196 thash = &auth_hash_hmac_sha2_384; 197 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 198 thash = &auth_hash_hmac_sha2_512; 199 else 200 return (EINVAL); 201 break; 202 case CRYPTO_RIPEMD160_HMAC: 203 thash = &auth_hash_hmac_ripemd_160_96; 204 break; 205#ifdef notdef 206 case CRYPTO_MD5: 207 thash = &auth_hash_md5; 208 break; 209 case CRYPTO_SHA1: 210 thash = &auth_hash_sha1; 211 break; 212#endif 213 case CRYPTO_NULL_HMAC: 214 thash = &auth_hash_null; 215 break; 216 default: 217 return (EINVAL); 218 } 219 220 bzero(&crie, sizeof(crie)); 221 bzero(&cria, sizeof(cria)); 222 223 if (txform) { 224 crie.cri_alg = txform->type; 225 crie.cri_klen = sop->keylen * 8; 226 if (sop->keylen > txform->maxkey || 227 sop->keylen < txform->minkey) { 228 error = EINVAL; 229 goto bail; 230 } 231 232 MALLOC(crie.cri_key, u_int8_t *, 233 crie.cri_klen / 8, M_XDATA, M_WAITOK); 234 if ((error = copyin(sop->key, crie.cri_key, 235 crie.cri_klen / 8))) 236 goto bail; 237 if (thash) 238 crie.cri_next = &cria; 239 } 240 241 if (thash) { 242 cria.cri_alg = thash->type; 243 cria.cri_klen = sop->mackeylen * 8; 244 if (sop->mackeylen != thash->keysize) { 245 error = EINVAL; 246 goto bail; 247 } 248 249 if (cria.cri_klen) { 250 MALLOC(cria.cri_key, u_int8_t *, 251 cria.cri_klen / 8, M_XDATA, M_WAITOK); 252 if ((error = copyin(sop->mackey, cria.cri_key, 253 cria.cri_klen / 8))) 254 goto bail; 255 } 256 } 257 258 error = crypto_newsession(&sid, (txform ? &crie : &cria), 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 273bail: 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 308static int cryptodev_cb(void *); 309 310 311static int 312cryptodev_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 | CRYPTO_F_CBIMM 388 | (cop->flags & COP_F_BATCH); 389 crp->crp_buf = (caddr_t)&cse->uio; 390 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 391 crp->crp_sid = cse->sid; 392 crp->crp_opaque = (void *)cse; 393 394 if (cop->iv) { 395 if (crde == NULL) { 396 error = EINVAL; 397 goto bail; 398 } 399 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 400 error = EINVAL; 401 goto bail; 402 } 403 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 404 goto bail; 405 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 406 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 407 crde->crd_skip = 0; 408 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 409 crde->crd_skip = 0; 410 } else if (crde) { 411 crde->crd_flags |= CRD_F_IV_PRESENT; 412 crde->crd_skip = cse->txform->blocksize; 413 crde->crd_len -= cse->txform->blocksize; 414 } 415 416 if (cop->mac) { 417 if (crda == NULL) { 418 error = EINVAL; 419 goto bail; 420 } 421 crp->crp_mac=cse->tmp_mac; 422 } 423 424 /* 425 * Let the dispatch run unlocked, then, interlock against the 426 * callback before checking if the operation completed and going 427 * to sleep. This insures drivers don't inherit our lock which 428 * results in a lock order reversal between crypto_dispatch forced 429 * entry and the crypto_done callback into us. 430 */ 431 error = crypto_dispatch(crp); 432 mtx_lock(&cse->lock); 433 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 434 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 435 mtx_unlock(&cse->lock); 436 437 if (error != 0) 438 goto bail; 439 440 if (crp->crp_etype != 0) { 441 error = crp->crp_etype; 442 goto bail; 443 } 444 445 if (cse->error) { 446 error = cse->error; 447 goto bail; 448 } 449 450 if (cop->dst && 451 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 452 goto bail; 453 454 if (cop->mac && 455 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 456 goto bail; 457 458bail: 459 if (crp) 460 crypto_freereq(crp); 461 if (cse->uio.uio_iov[0].iov_base) 462 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 463 464 return (error); 465} 466 467static int 468cryptodev_cb(void *op) 469{ 470 struct cryptop *crp = (struct cryptop *) op; 471 struct csession *cse = (struct csession *)crp->crp_opaque; 472 473 cse->error = crp->crp_etype; 474 if (crp->crp_etype == EAGAIN) 475 return crypto_dispatch(crp); 476 mtx_lock(&cse->lock); 477 wakeup_one(crp); 478 mtx_unlock(&cse->lock); 479 return (0); 480} 481 482static int 483cryptodevkey_cb(void *op) 484{ 485 struct cryptkop *krp = (struct cryptkop *) op; 486 487 wakeup(krp); 488 return (0); 489} 490 491static int 492cryptodev_key(struct crypt_kop *kop) 493{ 494 struct cryptkop *krp = NULL; 495 int error = EINVAL; 496 int in, out, size, i; 497 498 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 499 return (EFBIG); 500 } 501 502 in = kop->crk_iparams; 503 out = kop->crk_oparams; 504 switch (kop->crk_op) { 505 case CRK_MOD_EXP: 506 if (in == 3 && out == 1) 507 break; 508 return (EINVAL); 509 case CRK_MOD_EXP_CRT: 510 if (in == 6 && out == 1) 511 break; 512 return (EINVAL); 513 case CRK_DSA_SIGN: 514 if (in == 5 && out == 2) 515 break; 516 return (EINVAL); 517 case CRK_DSA_VERIFY: 518 if (in == 7 && out == 0) 519 break; 520 return (EINVAL); 521 case CRK_DH_COMPUTE_KEY: 522 if (in == 3 && out == 1) 523 break; 524 return (EINVAL); 525 default: 526 return (EINVAL); 527 } 528 529 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 530 if (!krp) 531 return (ENOMEM); 532 bzero(krp, sizeof *krp); 533 krp->krp_op = kop->crk_op; 534 krp->krp_status = kop->crk_status; 535 krp->krp_iparams = kop->crk_iparams; 536 krp->krp_oparams = kop->crk_oparams; 537 krp->krp_status = 0; 538 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 539 540 for (i = 0; i < CRK_MAXPARAM; i++) 541 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 542 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 543 size = (krp->krp_param[i].crp_nbits + 7) / 8; 544 if (size == 0) 545 continue; 546 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 547 if (i >= krp->krp_iparams) 548 continue; 549 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 550 if (error) 551 goto fail; 552 } 553 554 error = crypto_kdispatch(krp); 555 if (error) 556 goto fail; 557 error = tsleep(krp, PSOCK, "crydev", 0); 558 if (error) { 559 /* XXX can this happen? if so, how do we recover? */ 560 goto fail; 561 } 562 563 if (krp->krp_status != 0) { 564 error = krp->krp_status; 565 goto fail; 566 } 567 568 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 569 size = (krp->krp_param[i].crp_nbits + 7) / 8; 570 if (size == 0) 571 continue; 572 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 573 if (error) 574 goto fail; 575 } 576 577fail: 578 if (krp) { 579 kop->crk_status = krp->krp_status; 580 for (i = 0; i < CRK_MAXPARAM; i++) { 581 if (krp->krp_param[i].crp_p) 582 FREE(krp->krp_param[i].crp_p, M_XDATA); 583 } 584 free(krp, M_XDATA); 585 } 586 return (error); 587} 588 589/* ARGSUSED */ 590static int 591cryptof_poll( 592 struct file *fp, 593 int events, 594 struct ucred *active_cred, 595 struct thread *td) 596{ 597 598 return (0); 599} 600 601/* ARGSUSED */ 602static int 603cryptof_kqfilter(struct file *fp, struct knote *kn) 604{ 605 606 return (0); 607} 608 609/* ARGSUSED */ 610static int 611cryptof_stat( 612 struct file *fp, 613 struct stat *sb, 614 struct ucred *active_cred, 615 struct thread *td) 616{ 617 618 return (EOPNOTSUPP); 619} 620 621/* ARGSUSED */ 622static int 623cryptof_close(struct file *fp, struct thread *td) 624{ 625 struct fcrypt *fcr = fp->f_data; 626 struct csession *cse; 627 628 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 629 TAILQ_REMOVE(&fcr->csessions, cse, next); 630 (void)csefree(cse); 631 } 632 FREE(fcr, M_XDATA); 633 fp->f_data = NULL; 634 return 0; 635} 636 637static struct csession * 638csefind(struct fcrypt *fcr, u_int ses) 639{ 640 struct csession *cse; 641 642 TAILQ_FOREACH(cse, &fcr->csessions, next) 643 if (cse->ses == ses) 644 return (cse); 645 return (NULL); 646} 647 648static int 649csedelete(struct fcrypt *fcr, struct csession *cse_del) 650{ 651 struct csession *cse; 652 653 TAILQ_FOREACH(cse, &fcr->csessions, next) { 654 if (cse == cse_del) { 655 TAILQ_REMOVE(&fcr->csessions, cse, next); 656 return (1); 657 } 658 } 659 return (0); 660} 661 662static struct csession * 663cseadd(struct fcrypt *fcr, struct csession *cse) 664{ 665 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 666 cse->ses = fcr->sesn++; 667 return (cse); 668} 669 670struct csession * 671csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 672 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 673 struct enc_xform *txform, struct auth_hash *thash) 674{ 675 struct csession *cse; 676 677#ifdef INVARIANTS 678 /* NB: required when mtx_init is built with INVARIANTS */ 679 MALLOC(cse, struct csession *, sizeof(struct csession), 680 M_XDATA, M_NOWAIT | M_ZERO); 681#else 682 MALLOC(cse, struct csession *, sizeof(struct csession), 683 M_XDATA, M_NOWAIT); 684#endif 685 if (cse == NULL) 686 return NULL; 687 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 688 cse->key = key; 689 cse->keylen = keylen/8; 690 cse->mackey = mackey; 691 cse->mackeylen = mackeylen/8; 692 cse->sid = sid; 693 cse->cipher = cipher; 694 cse->mac = mac; 695 cse->txform = txform; 696 cse->thash = thash; 697 cseadd(fcr, cse); 698 return (cse); 699} 700 701static int 702csefree(struct csession *cse) 703{ 704 int error; 705 706 error = crypto_freesession(cse->sid); 707 mtx_destroy(&cse->lock); 708 if (cse->key) 709 FREE(cse->key, M_XDATA); 710 if (cse->mackey) 711 FREE(cse->mackey, M_XDATA); 712 FREE(cse, M_XDATA); 713 return (error); 714} 715 716static int 717cryptoopen(dev_t dev, int oflags, int devtype, struct thread *td) 718{ 719 return (0); 720} 721 722static int 723cryptoread(dev_t dev, struct uio *uio, int ioflag) 724{ 725 return (EIO); 726} 727 728static int 729cryptowrite(dev_t dev, struct uio *uio, int ioflag) 730{ 731 return (EIO); 732} 733 734static int 735cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 736{ 737 struct file *f; 738 struct fcrypt *fcr; 739 int fd, error; 740 741 switch (cmd) { 742 case CRIOGET: 743 MALLOC(fcr, struct fcrypt *, 744 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 745 TAILQ_INIT(&fcr->csessions); 746 fcr->sesn = 0; 747 748 error = falloc(td, &f, &fd); 749 750 if (error) { 751 FREE(fcr, M_XDATA); 752 return (error); 753 } 754 /* falloc automatically provides an extra reference to 'f'. */ 755 f->f_flag = FREAD | FWRITE; 756 f->f_type = DTYPE_CRYPTO; 757 f->f_ops = &cryptofops; 758 f->f_data = fcr; 759 *(u_int32_t *)data = fd; 760 fdrop(f, td); 761 break; 762 default: 763 error = EINVAL; 764 break; 765 } 766 return (error); 767} 768 769#define CRYPTO_MAJOR 70 /* from openbsd */ 770static struct cdevsw crypto_cdevsw = { 771 .d_open = cryptoopen, 772 .d_read = cryptoread, 773 .d_write = cryptowrite, 774 .d_ioctl = cryptoioctl, 775 .d_name = "crypto", 776 .d_maj = CRYPTO_MAJOR, 777}; 778static dev_t crypto_dev; 779 780/* 781 * Initialization code, both for static and dynamic loading. 782 */ 783static int 784cryptodev_modevent(module_t mod, int type, void *unused) 785{ 786 switch (type) { 787 case MOD_LOAD: 788 if (bootverbose) 789 printf("crypto: <crypto device>\n"); 790 crypto_dev = make_dev(&crypto_cdevsw, 0, 791 UID_ROOT, GID_WHEEL, 0666, 792 "crypto"); 793 return 0; 794 case MOD_UNLOAD: 795 /*XXX disallow if active sessions */ 796 destroy_dev(crypto_dev); 797 return 0; 798 } 799 return EINVAL; 800} 801 802static moduledata_t cryptodev_mod = { 803 "cryptodev", 804 cryptodev_modevent, 805 0 806}; 807MODULE_VERSION(cryptodev, 1); 808DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 809MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 810