cryptodev.c revision 137806
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 137806 2004-11-17 09:09:55Z phk $"); 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 goto bail; 270 271 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 272 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 273 thash); 274 275 if (cse == NULL) { 276 crypto_freesession(sid); 277 error = EINVAL; 278 goto bail; 279 } 280 sop->ses = cse->ses; 281 282bail: 283 if (error) { 284 if (crie.cri_key) 285 FREE(crie.cri_key, M_XDATA); 286 if (cria.cri_key) 287 FREE(cria.cri_key, M_XDATA); 288 } 289 break; 290 case CIOCFSESSION: 291 ses = *(u_int32_t *)data; 292 cse = csefind(fcr, ses); 293 if (cse == NULL) { 294 mtx_unlock(&Giant); 295 return (EINVAL); 296 } 297 csedelete(fcr, cse); 298 error = csefree(cse); 299 break; 300 case CIOCCRYPT: 301 cop = (struct crypt_op *)data; 302 cse = csefind(fcr, cop->ses); 303 if (cse == NULL) { 304 mtx_unlock(&Giant); 305 return (EINVAL); 306 } 307 error = cryptodev_op(cse, cop, active_cred, td); 308 break; 309 case CIOCKEY: 310 error = cryptodev_key((struct crypt_kop *)data); 311 break; 312 case CIOCASYMFEAT: 313 error = crypto_getfeat((int *)data); 314 break; 315 default: 316 error = EINVAL; 317 } 318 mtx_unlock(&Giant); 319 return (error); 320} 321 322static int cryptodev_cb(void *); 323 324 325static int 326cryptodev_op( 327 struct csession *cse, 328 struct crypt_op *cop, 329 struct ucred *active_cred, 330 struct thread *td) 331{ 332 struct cryptop *crp = NULL; 333 struct cryptodesc *crde = NULL, *crda = NULL; 334 int error; 335 336 if (cop->len > 256*1024-4) 337 return (E2BIG); 338 339 if (cse->txform && (cop->len % cse->txform->blocksize) != 0) 340 return (EINVAL); 341 342 cse->uio.uio_iov = &cse->iovec; 343 cse->uio.uio_iovcnt = 1; 344 cse->uio.uio_offset = 0; 345 cse->uio.uio_resid = cop->len; 346 cse->uio.uio_segflg = UIO_SYSSPACE; 347 cse->uio.uio_rw = UIO_WRITE; 348 cse->uio.uio_td = td; 349 cse->uio.uio_iov[0].iov_len = cop->len; 350 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 351 352 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 353 if (crp == NULL) { 354 error = ENOMEM; 355 goto bail; 356 } 357 358 if (cse->thash) { 359 crda = crp->crp_desc; 360 if (cse->txform) 361 crde = crda->crd_next; 362 } else { 363 if (cse->txform) 364 crde = crp->crp_desc; 365 else { 366 error = EINVAL; 367 goto bail; 368 } 369 } 370 371 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 372 goto bail; 373 374 if (crda) { 375 crda->crd_skip = 0; 376 crda->crd_len = cop->len; 377 crda->crd_inject = 0; /* ??? */ 378 379 crda->crd_alg = cse->mac; 380 crda->crd_key = cse->mackey; 381 crda->crd_klen = cse->mackeylen * 8; 382 } 383 384 if (crde) { 385 if (cop->op == COP_ENCRYPT) 386 crde->crd_flags |= CRD_F_ENCRYPT; 387 else 388 crde->crd_flags &= ~CRD_F_ENCRYPT; 389 crde->crd_len = cop->len; 390 crde->crd_inject = 0; 391 392 crde->crd_alg = cse->cipher; 393 crde->crd_key = cse->key; 394 crde->crd_klen = cse->keylen * 8; 395 } 396 397 crp->crp_ilen = cop->len; 398 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 399 | (cop->flags & COP_F_BATCH); 400 crp->crp_buf = (caddr_t)&cse->uio; 401 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 402 crp->crp_sid = cse->sid; 403 crp->crp_opaque = (void *)cse; 404 405 if (cop->iv) { 406 if (crde == NULL) { 407 error = EINVAL; 408 goto bail; 409 } 410 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 411 error = EINVAL; 412 goto bail; 413 } 414 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 415 goto bail; 416 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 417 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 418 crde->crd_skip = 0; 419 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 420 crde->crd_skip = 0; 421 } else if (crde) { 422 crde->crd_flags |= CRD_F_IV_PRESENT; 423 crde->crd_skip = cse->txform->blocksize; 424 crde->crd_len -= cse->txform->blocksize; 425 } 426 427 if (cop->mac) { 428 if (crda == NULL) { 429 error = EINVAL; 430 goto bail; 431 } 432 crp->crp_mac=cse->tmp_mac; 433 } 434 435 /* 436 * Let the dispatch run unlocked, then, interlock against the 437 * callback before checking if the operation completed and going 438 * to sleep. This insures drivers don't inherit our lock which 439 * results in a lock order reversal between crypto_dispatch forced 440 * entry and the crypto_done callback into us. 441 */ 442 error = crypto_dispatch(crp); 443 mtx_lock(&cse->lock); 444 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 445 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 446 mtx_unlock(&cse->lock); 447 448 if (error != 0) 449 goto bail; 450 451 if (crp->crp_etype != 0) { 452 error = crp->crp_etype; 453 goto bail; 454 } 455 456 if (cse->error) { 457 error = cse->error; 458 goto bail; 459 } 460 461 if (cop->dst && 462 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 463 goto bail; 464 465 if (cop->mac && 466 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 467 goto bail; 468 469bail: 470 if (crp) 471 crypto_freereq(crp); 472 if (cse->uio.uio_iov[0].iov_base) 473 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 474 475 return (error); 476} 477 478static int 479cryptodev_cb(void *op) 480{ 481 struct cryptop *crp = (struct cryptop *) op; 482 struct csession *cse = (struct csession *)crp->crp_opaque; 483 484 cse->error = crp->crp_etype; 485 if (crp->crp_etype == EAGAIN) 486 return crypto_dispatch(crp); 487 mtx_lock(&cse->lock); 488 wakeup_one(crp); 489 mtx_unlock(&cse->lock); 490 return (0); 491} 492 493static int 494cryptodevkey_cb(void *op) 495{ 496 struct cryptkop *krp = (struct cryptkop *) op; 497 498 wakeup(krp); 499 return (0); 500} 501 502static int 503cryptodev_key(struct crypt_kop *kop) 504{ 505 struct cryptkop *krp = NULL; 506 int error = EINVAL; 507 int in, out, size, i; 508 509 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 510 return (EFBIG); 511 } 512 513 in = kop->crk_iparams; 514 out = kop->crk_oparams; 515 switch (kop->crk_op) { 516 case CRK_MOD_EXP: 517 if (in == 3 && out == 1) 518 break; 519 return (EINVAL); 520 case CRK_MOD_EXP_CRT: 521 if (in == 6 && out == 1) 522 break; 523 return (EINVAL); 524 case CRK_DSA_SIGN: 525 if (in == 5 && out == 2) 526 break; 527 return (EINVAL); 528 case CRK_DSA_VERIFY: 529 if (in == 7 && out == 0) 530 break; 531 return (EINVAL); 532 case CRK_DH_COMPUTE_KEY: 533 if (in == 3 && out == 1) 534 break; 535 return (EINVAL); 536 default: 537 return (EINVAL); 538 } 539 540 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 541 if (!krp) 542 return (ENOMEM); 543 bzero(krp, sizeof *krp); 544 krp->krp_op = kop->crk_op; 545 krp->krp_status = kop->crk_status; 546 krp->krp_iparams = kop->crk_iparams; 547 krp->krp_oparams = kop->crk_oparams; 548 krp->krp_status = 0; 549 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 550 551 for (i = 0; i < CRK_MAXPARAM; i++) 552 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 553 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 554 size = (krp->krp_param[i].crp_nbits + 7) / 8; 555 if (size == 0) 556 continue; 557 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 558 if (i >= krp->krp_iparams) 559 continue; 560 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 561 if (error) 562 goto fail; 563 } 564 565 error = crypto_kdispatch(krp); 566 if (error) 567 goto fail; 568 error = tsleep(krp, PSOCK, "crydev", 0); 569 if (error) { 570 /* XXX can this happen? if so, how do we recover? */ 571 goto fail; 572 } 573 574 if (krp->krp_status != 0) { 575 error = krp->krp_status; 576 goto fail; 577 } 578 579 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 580 size = (krp->krp_param[i].crp_nbits + 7) / 8; 581 if (size == 0) 582 continue; 583 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 584 if (error) 585 goto fail; 586 } 587 588fail: 589 if (krp) { 590 kop->crk_status = krp->krp_status; 591 for (i = 0; i < CRK_MAXPARAM; i++) { 592 if (krp->krp_param[i].crp_p) 593 FREE(krp->krp_param[i].crp_p, M_XDATA); 594 } 595 free(krp, M_XDATA); 596 } 597 return (error); 598} 599 600/* ARGSUSED */ 601static int 602cryptof_poll( 603 struct file *fp, 604 int events, 605 struct ucred *active_cred, 606 struct thread *td) 607{ 608 609 return (0); 610} 611 612/* ARGSUSED */ 613static int 614cryptof_kqfilter(struct file *fp, struct knote *kn) 615{ 616 617 return (0); 618} 619 620/* ARGSUSED */ 621static int 622cryptof_stat( 623 struct file *fp, 624 struct stat *sb, 625 struct ucred *active_cred, 626 struct thread *td) 627{ 628 629 return (EOPNOTSUPP); 630} 631 632/* ARGSUSED */ 633static int 634cryptof_close(struct file *fp, struct thread *td) 635{ 636 struct fcrypt *fcr = fp->f_data; 637 struct csession *cse; 638 639 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 640 TAILQ_REMOVE(&fcr->csessions, cse, next); 641 (void)csefree(cse); 642 } 643 FREE(fcr, M_XDATA); 644 fp->f_data = NULL; 645 return 0; 646} 647 648static struct csession * 649csefind(struct fcrypt *fcr, u_int ses) 650{ 651 struct csession *cse; 652 653 TAILQ_FOREACH(cse, &fcr->csessions, next) 654 if (cse->ses == ses) 655 return (cse); 656 return (NULL); 657} 658 659static int 660csedelete(struct fcrypt *fcr, struct csession *cse_del) 661{ 662 struct csession *cse; 663 664 TAILQ_FOREACH(cse, &fcr->csessions, next) { 665 if (cse == cse_del) { 666 TAILQ_REMOVE(&fcr->csessions, cse, next); 667 return (1); 668 } 669 } 670 return (0); 671} 672 673static struct csession * 674cseadd(struct fcrypt *fcr, struct csession *cse) 675{ 676 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 677 cse->ses = fcr->sesn++; 678 return (cse); 679} 680 681struct csession * 682csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 683 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 684 struct enc_xform *txform, struct auth_hash *thash) 685{ 686 struct csession *cse; 687 688#ifdef INVARIANTS 689 /* NB: required when mtx_init is built with INVARIANTS */ 690 MALLOC(cse, struct csession *, sizeof(struct csession), 691 M_XDATA, M_NOWAIT | M_ZERO); 692#else 693 MALLOC(cse, struct csession *, sizeof(struct csession), 694 M_XDATA, M_NOWAIT); 695#endif 696 if (cse == NULL) 697 return NULL; 698 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 699 cse->key = key; 700 cse->keylen = keylen/8; 701 cse->mackey = mackey; 702 cse->mackeylen = mackeylen/8; 703 cse->sid = sid; 704 cse->cipher = cipher; 705 cse->mac = mac; 706 cse->txform = txform; 707 cse->thash = thash; 708 cseadd(fcr, cse); 709 return (cse); 710} 711 712static int 713csefree(struct csession *cse) 714{ 715 int error; 716 717 error = crypto_freesession(cse->sid); 718 mtx_destroy(&cse->lock); 719 if (cse->key) 720 FREE(cse->key, M_XDATA); 721 if (cse->mackey) 722 FREE(cse->mackey, M_XDATA); 723 FREE(cse, M_XDATA); 724 return (error); 725} 726 727static int 728cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 729{ 730 return (0); 731} 732 733static int 734cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 735{ 736 return (EIO); 737} 738 739static int 740cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 741{ 742 return (EIO); 743} 744 745static int 746cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 747{ 748 struct file *f; 749 struct fcrypt *fcr; 750 int fd, error; 751 752 switch (cmd) { 753 case CRIOGET: 754 MALLOC(fcr, struct fcrypt *, 755 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 756 TAILQ_INIT(&fcr->csessions); 757 fcr->sesn = 0; 758 759 error = falloc(td, &f, &fd); 760 761 if (error) { 762 FREE(fcr, M_XDATA); 763 return (error); 764 } 765 /* falloc automatically provides an extra reference to 'f'. */ 766 f->f_flag = FREAD | FWRITE; 767 f->f_type = DTYPE_CRYPTO; 768 f->f_ops = &cryptofops; 769 f->f_data = fcr; 770 *(u_int32_t *)data = fd; 771 fdrop(f, td); 772 break; 773 default: 774 error = EINVAL; 775 break; 776 } 777 return (error); 778} 779 780#define CRYPTO_MAJOR 70 /* from openbsd */ 781static struct cdevsw crypto_cdevsw = { 782 .d_version = D_VERSION, 783 .d_flags = D_NEEDGIANT, 784 .d_open = cryptoopen, 785 .d_read = cryptoread, 786 .d_write = cryptowrite, 787 .d_ioctl = cryptoioctl, 788 .d_name = "crypto", 789 .d_maj = CRYPTO_MAJOR, 790}; 791static struct cdev *crypto_dev; 792 793/* 794 * Initialization code, both for static and dynamic loading. 795 */ 796static int 797cryptodev_modevent(module_t mod, int type, void *unused) 798{ 799 switch (type) { 800 case MOD_LOAD: 801 if (bootverbose) 802 printf("crypto: <crypto device>\n"); 803 crypto_dev = make_dev(&crypto_cdevsw, 0, 804 UID_ROOT, GID_WHEEL, 0666, 805 "crypto"); 806 return 0; 807 case MOD_UNLOAD: 808 /*XXX disallow if active sessions */ 809 destroy_dev(crypto_dev); 810 return 0; 811 } 812 return EINVAL; 813} 814 815static moduledata_t cryptodev_mod = { 816 "cryptodev", 817 cryptodev_modevent, 818 0 819}; 820MODULE_VERSION(cryptodev, 1); 821DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 822MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 823