Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/cryptodev.c
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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: releng/5.2/sys/opencrypto/cryptodev.c 122908 2003-11-19 22:42:34Z sam $"); 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 56 struct 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; 76 struct uio uio; 77 int error; 78 }; 79 80 struct fcrypt { 81 TAILQ_HEAD(csessionlist, csession) csessions; 82 int sesn; 83 }; 84 85 static int cryptof_rw(struct file *fp, struct uio *uio, 86 struct ucred *cred, int flags, struct thread *); 87 static int cryptof_ioctl(struct file *, u_long, void *, 88 struct ucred *, struct thread *); 89 static int cryptof_poll(struct file *, int, struct ucred *, struct thread *); 90 static int cryptof_kqfilter(struct file *, struct knote *); 91 static int cryptof_stat(struct file *, struct stat *, 92 struct ucred *, struct thread *); 93 static int cryptof_close(struct file *, struct thread *); 94 95 static 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 }; 104 105 static struct csession *csefind(struct fcrypt *, u_int); 106 static int csedelete(struct fcrypt *, struct csession *); 107 static struct csession *cseadd(struct fcrypt *, struct csession *); 108 static 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 *); 111 static int csefree(struct csession *); 112 113 static int cryptodev_op(struct csession *, struct crypt_op *, 114 struct ucred *, struct thread *td); 115 static int cryptodev_key(struct crypt_kop *); 116 117 static int 118 cryptof_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 */ 130 static int 131 cryptof_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; 272 273 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 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 cse->uio.uio_iov = &cse->iovec; 329 cse->uio.uio_iovcnt = 1; 330 cse->uio.uio_offset = 0; 331 cse->uio.uio_resid = cop->len; 332 cse->uio.uio_segflg = UIO_SYSSPACE; 333 cse->uio.uio_rw = UIO_WRITE; 334 cse->uio.uio_td = td; 335 cse->uio.uio_iov[0].iov_len = cop->len; 336 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 337 338 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 339 if (crp == NULL) { 340 error = ENOMEM; 341 goto bail; 342 } 343 344 if (cse->thash) { 345 crda = crp->crp_desc; 346 if (cse->txform) 347 crde = crda->crd_next; 348 } else { 349 if (cse->txform) 350 crde = crp->crp_desc; 351 else { 352 error = EINVAL; 353 goto bail; 354 } 355 } 356 357 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 358 goto bail; 359 360 if (crda) { 361 crda->crd_skip = 0; 362 crda->crd_len = cop->len; 363 crda->crd_inject = 0; /* ??? */ 364 365 crda->crd_alg = cse->mac; 366 crda->crd_key = cse->mackey; 367 crda->crd_klen = cse->mackeylen * 8; 368 } 369 370 if (crde) { 371 if (cop->op == COP_ENCRYPT) 372 crde->crd_flags |= CRD_F_ENCRYPT; 373 else 374 crde->crd_flags &= ~CRD_F_ENCRYPT; 375 crde->crd_len = cop->len; 376 crde->crd_inject = 0; 377 378 crde->crd_alg = cse->cipher; 379 crde->crd_key = cse->key; 380 crde->crd_klen = cse->keylen * 8; 381 } 382 383 crp->crp_ilen = cop->len; 384 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 385 | (cop->flags & COP_F_BATCH); 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 /* 422 * Let the dispatch run unlocked, then, interlock against the 423 * callback before checking if the operation completed and going 424 * to sleep. This insures drivers don't inherit our lock which 425 * results in a lock order reversal between crypto_dispatch forced 426 * entry and the crypto_done callback into us. 427 */ 428 error = crypto_dispatch(crp); 429 mtx_lock(&cse->lock); 430 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 431 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 432 mtx_unlock(&cse->lock); 433 434 if (error != 0) 435 goto bail; 436 437 if (crp->crp_etype != 0) { 438 error = crp->crp_etype; 439 goto bail; 440 } 441 442 if (cse->error) { 443 error = cse->error; 444 goto bail; 445 } 446 447 if (cop->dst && 448 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 449 goto bail; 450 451 if (cop->mac && 452 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 453 goto bail; 454 455 bail: 456 if (crp) 457 crypto_freereq(crp); 458 if (cse->uio.uio_iov[0].iov_base) 459 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 460 461 return (error); 462 } 463 464 static int 465 cryptodev_cb(void *op) 466 { 467 struct cryptop *crp = (struct cryptop *) op; 468 struct csession *cse = (struct csession *)crp->crp_opaque; 469 470 cse->error = crp->crp_etype; 471 if (crp->crp_etype == EAGAIN) 472 return crypto_dispatch(crp); 473 mtx_lock(&cse->lock); 474 wakeup_one(crp); 475 mtx_unlock(&cse->lock); 476 return (0); 477 } 478 479 static int 480 cryptodevkey_cb(void *op) 481 { 482 struct cryptkop *krp = (struct cryptkop *) op; 483 484 wakeup(krp); 485 return (0); 486 } 487 488 static int 489 cryptodev_key(struct crypt_kop *kop) 490 { 491 struct cryptkop *krp = NULL; 492 int error = EINVAL; 493 int in, out, size, i; 494 495 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 496 return (EFBIG); 497 } 498 499 in = kop->crk_iparams; 500 out = kop->crk_oparams; 501 switch (kop->crk_op) { 502 case CRK_MOD_EXP: 503 if (in == 3 && out == 1) 504 break; 505 return (EINVAL); 506 case CRK_MOD_EXP_CRT: 507 if (in == 6 && out == 1) 508 break; 509 return (EINVAL); 510 case CRK_DSA_SIGN: 511 if (in == 5 && out == 2) 512 break; 513 return (EINVAL); 514 case CRK_DSA_VERIFY: 515 if (in == 7 && out == 0) 516 break; 517 return (EINVAL); 518 case CRK_DH_COMPUTE_KEY: 519 if (in == 3 && out == 1) 520 break; 521 return (EINVAL); 522 default: 523 return (EINVAL); 524 } 525 526 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 527 if (!krp) 528 return (ENOMEM); 529 bzero(krp, sizeof *krp); 530 krp->krp_op = kop->crk_op; 531 krp->krp_status = kop->crk_status; 532 krp->krp_iparams = kop->crk_iparams; 533 krp->krp_oparams = kop->crk_oparams; 534 krp->krp_status = 0; 535 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 536 537 for (i = 0; i < CRK_MAXPARAM; i++) 538 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 539 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 540 size = (krp->krp_param[i].crp_nbits + 7) / 8; 541 if (size == 0) 542 continue; 543 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 544 if (i >= krp->krp_iparams) 545 continue; 546 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 547 if (error) 548 goto fail; 549 } 550 551 error = crypto_kdispatch(krp); 552 if (error) 553 goto fail; 554 error = tsleep(krp, PSOCK, "crydev", 0); 555 if (error) { 556 /* XXX can this happen? if so, how do we recover? */ 557 goto fail; 558 } 559 560 if (krp->krp_status != 0) { 561 error = krp->krp_status; 562 goto fail; 563 } 564 565 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 566 size = (krp->krp_param[i].crp_nbits + 7) / 8; 567 if (size == 0) 568 continue; 569 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 570 if (error) 571 goto fail; 572 } 573 574 fail: 575 if (krp) { 576 kop->crk_status = krp->krp_status; 577 for (i = 0; i < CRK_MAXPARAM; i++) { 578 if (krp->krp_param[i].crp_p) 579 FREE(krp->krp_param[i].crp_p, M_XDATA); 580 } 581 free(krp, M_XDATA); 582 } 583 return (error); 584 } 585 586 /* ARGSUSED */ 587 static int 588 cryptof_poll( 589 struct file *fp, 590 int events, 591 struct ucred *active_cred, 592 struct thread *td) 593 { 594 595 return (0); 596 } 597 598 /* ARGSUSED */ 599 static int 600 cryptof_kqfilter(struct file *fp, struct knote *kn) 601 { 602 603 return (0); 604 } 605 606 /* ARGSUSED */ 607 static int 608 cryptof_stat( 609 struct file *fp, 610 struct stat *sb, 611 struct ucred *active_cred, 612 struct thread *td) 613 { 614 615 return (EOPNOTSUPP); 616 } 617 618 /* ARGSUSED */ 619 static int 620 cryptof_close(struct file *fp, struct thread *td) 621 { 622 struct fcrypt *fcr = fp->f_data; 623 struct csession *cse; 624 625 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 626 TAILQ_REMOVE(&fcr->csessions, cse, next); 627 (void)csefree(cse); 628 } 629 FREE(fcr, M_XDATA); 630 fp->f_data = NULL; 631 return 0; 632 } 633 634 static struct csession * 635 csefind(struct fcrypt *fcr, u_int ses) 636 { 637 struct csession *cse; 638 639 TAILQ_FOREACH(cse, &fcr->csessions, next) 640 if (cse->ses == ses) 641 return (cse); 642 return (NULL); 643 } 644 645 static int 646 csedelete(struct fcrypt *fcr, struct csession *cse_del) 647 { 648 struct csession *cse; 649 650 TAILQ_FOREACH(cse, &fcr->csessions, next) { 651 if (cse == cse_del) { 652 TAILQ_REMOVE(&fcr->csessions, cse, next); 653 return (1); 654 } 655 } 656 return (0); 657 } 658 659 static struct csession * 660 cseadd(struct fcrypt *fcr, struct csession *cse) 661 { 662 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 663 cse->ses = fcr->sesn++; 664 return (cse); 665 } 666 667 struct csession * 668 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 669 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 670 struct enc_xform *txform, struct auth_hash *thash) 671 { 672 struct csession *cse; 673 674 #ifdef INVARIANTS 675 /* NB: required when mtx_init is built with INVARIANTS */ 676 MALLOC(cse, struct csession *, sizeof(struct csession), 677 M_XDATA, M_NOWAIT | M_ZERO); 678 #else 679 MALLOC(cse, struct csession *, sizeof(struct csession), 680 M_XDATA, M_NOWAIT); 681 #endif 682 if (cse == NULL) 683 return NULL; 684 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 685 cse->key = key; 686 cse->keylen = keylen/8; 687 cse->mackey = mackey; 688 cse->mackeylen = mackeylen/8; 689 cse->sid = sid; 690 cse->cipher = cipher; 691 cse->mac = mac; 692 cse->txform = txform; 693 cse->thash = thash; 694 cseadd(fcr, cse); 695 return (cse); 696 } 697 698 static int 699 csefree(struct csession *cse) 700 { 701 int error; 702 703 error = crypto_freesession(cse->sid); 704 mtx_destroy(&cse->lock); 705 if (cse->key) 706 FREE(cse->key, M_XDATA); 707 if (cse->mackey) 708 FREE(cse->mackey, M_XDATA); 709 FREE(cse, M_XDATA); 710 return (error); 711 } 712 713 static int 714 cryptoopen(dev_t dev, int oflags, int devtype, struct thread *td) 715 { 716 return (0); 717 } 718 719 static int 720 cryptoread(dev_t dev, struct uio *uio, int ioflag) 721 { 722 return (EIO); 723 } 724 725 static int 726 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 727 { 728 return (EIO); 729 } 730 731 static int 732 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 733 { 734 struct file *f; 735 struct fcrypt *fcr; 736 int fd, error; 737 738 switch (cmd) { 739 case CRIOGET: 740 MALLOC(fcr, struct fcrypt *, 741 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 742 TAILQ_INIT(&fcr->csessions); 743 fcr->sesn = 0; 744 745 error = falloc(td, &f, &fd); 746 747 if (error) { 748 FREE(fcr, M_XDATA); 749 return (error); 750 } 751 /* falloc automatically provides an extra reference to 'f'. */ 752 f->f_flag = FREAD | FWRITE; 753 f->f_type = DTYPE_CRYPTO; 754 f->f_ops = &cryptofops; 755 f->f_data = fcr; 756 *(u_int32_t *)data = fd; 757 fdrop(f, td); 758 break; 759 default: 760 error = EINVAL; 761 break; 762 } 763 return (error); 764 } 765 766 #define CRYPTO_MAJOR 70 /* from openbsd */ 767 static struct cdevsw crypto_cdevsw = { 768 .d_open = cryptoopen, 769 .d_read = cryptoread, 770 .d_write = cryptowrite, 771 .d_ioctl = cryptoioctl, 772 .d_name = "crypto", 773 .d_maj = CRYPTO_MAJOR, 774 }; 775 static dev_t crypto_dev; 776 777 /* 778 * Initialization code, both for static and dynamic loading. 779 */ 780 static int 781 cryptodev_modevent(module_t mod, int type, void *unused) 782 { 783 switch (type) { 784 case MOD_LOAD: 785 if (bootverbose) 786 printf("crypto: <crypto device>\n"); 787 crypto_dev = make_dev(&crypto_cdevsw, 0, 788 UID_ROOT, GID_WHEEL, 0666, 789 "crypto"); 790 return 0; 791 case MOD_UNLOAD: 792 /*XXX disallow if active sessions */ 793 destroy_dev(crypto_dev); 794 return 0; 795 } 796 return EINVAL; 797 } 798 799 static moduledata_t cryptodev_mod = { 800 "cryptodev", 801 cryptodev_modevent, 802 0 803 }; 804 MODULE_VERSION(cryptodev, 1); 805 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 806 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
Cache object: ae4b538c443af250e95299381dab0d53
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