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("$FreeBSD$"); 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/random.h> 48 #include <sys/conf.h> 49 #include <sys/kernel.h> 50 #include <sys/module.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 74 caddr_t buf; 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 .fo_read = cryptof_rw, 95 .fo_write = cryptof_rw, 96 .fo_ioctl = cryptof_ioctl, 97 .fo_poll = cryptof_poll, 98 .fo_kqfilter = cryptof_kqfilter, 99 .fo_stat = cryptof_stat, 100 .fo_close = 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 /* 148 * XXX: Not sure Giant is needed, but better safe than sorry 149 */ 150 mtx_lock(&Giant); 151 switch (cmd) { 152 case CIOCGSESSION: 153 sop = (struct session_op *)data; 154 switch (sop->cipher) { 155 case 0: 156 break; 157 case CRYPTO_DES_CBC: 158 txform = &enc_xform_des; 159 break; 160 case CRYPTO_3DES_CBC: 161 txform = &enc_xform_3des; 162 break; 163 case CRYPTO_BLF_CBC: 164 txform = &enc_xform_blf; 165 break; 166 case CRYPTO_CAST_CBC: 167 txform = &enc_xform_cast5; 168 break; 169 case CRYPTO_SKIPJACK_CBC: 170 txform = &enc_xform_skipjack; 171 break; 172 case CRYPTO_AES_CBC: 173 txform = &enc_xform_rijndael128; 174 break; 175 case CRYPTO_NULL_CBC: 176 txform = &enc_xform_null; 177 break; 178 case CRYPTO_ARC4: 179 txform = &enc_xform_arc4; 180 break; 181 case CRYPTO_CAMELLIA_CBC: 182 txform = &enc_xform_camellia; 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; 194 break; 195 case CRYPTO_SHA1_HMAC: 196 thash = &auth_hash_hmac_sha1; 197 break; 198 case CRYPTO_SHA2_256_HMAC: 199 thash = &auth_hash_hmac_sha2_256; 200 break; 201 case CRYPTO_SHA2_384_HMAC: 202 thash = &auth_hash_hmac_sha2_384; 203 break; 204 case CRYPTO_SHA2_512_HMAC: 205 thash = &auth_hash_hmac_sha2_512; 206 break; 207 case CRYPTO_RIPEMD160_HMAC: 208 thash = &auth_hash_hmac_ripemd_160; 209 break; 210 #ifdef notdef 211 case CRYPTO_MD5: 212 thash = &auth_hash_md5; 213 break; 214 case CRYPTO_SHA1: 215 thash = &auth_hash_sha1; 216 break; 217 #endif 218 case CRYPTO_NULL_HMAC: 219 thash = &auth_hash_null; 220 break; 221 default: 222 mtx_unlock(&Giant); 223 return (EINVAL); 224 } 225 226 bzero(&crie, sizeof(crie)); 227 bzero(&cria, sizeof(cria)); 228 229 if (txform) { 230 crie.cri_alg = txform->type; 231 crie.cri_klen = sop->keylen * 8; 232 if (sop->keylen > txform->maxkey || 233 sop->keylen < txform->minkey) { 234 error = EINVAL; 235 goto bail; 236 } 237 238 MALLOC(crie.cri_key, u_int8_t *, 239 crie.cri_klen / 8, M_XDATA, M_WAITOK); 240 if ((error = copyin(sop->key, crie.cri_key, 241 crie.cri_klen / 8))) 242 goto bail; 243 if (thash) 244 crie.cri_next = &cria; 245 } 246 247 if (thash) { 248 cria.cri_alg = thash->type; 249 cria.cri_klen = sop->mackeylen * 8; 250 if (sop->mackeylen != thash->keysize) { 251 error = EINVAL; 252 goto bail; 253 } 254 255 if (cria.cri_klen) { 256 MALLOC(cria.cri_key, u_int8_t *, 257 cria.cri_klen / 8, M_XDATA, M_WAITOK); 258 if ((error = copyin(sop->mackey, cria.cri_key, 259 cria.cri_klen / 8))) 260 goto bail; 261 } 262 } 263 264 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1); 265 if (error) { 266 if (crypto_devallowsoft) { 267 error = crypto_newsession(&sid, 268 (txform ? &crie : &cria), 0); 269 } 270 if (error) 271 goto bail; 272 } 273 274 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 275 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 276 thash); 277 278 if (cse == NULL) { 279 crypto_freesession(sid); 280 error = EINVAL; 281 goto bail; 282 } 283 sop->ses = cse->ses; 284 285 bail: 286 if (error) { 287 if (crie.cri_key) 288 FREE(crie.cri_key, M_XDATA); 289 if (cria.cri_key) 290 FREE(cria.cri_key, M_XDATA); 291 } 292 break; 293 case CIOCFSESSION: 294 ses = *(u_int32_t *)data; 295 cse = csefind(fcr, ses); 296 if (cse == NULL) { 297 mtx_unlock(&Giant); 298 return (EINVAL); 299 } 300 csedelete(fcr, cse); 301 error = csefree(cse); 302 break; 303 case CIOCCRYPT: 304 cop = (struct crypt_op *)data; 305 cse = csefind(fcr, cop->ses); 306 if (cse == NULL) { 307 mtx_unlock(&Giant); 308 return (EINVAL); 309 } 310 error = cryptodev_op(cse, cop, active_cred, td); 311 break; 312 case CIOCKEY: 313 error = cryptodev_key((struct crypt_kop *)data); 314 break; 315 case CIOCASYMFEAT: 316 error = crypto_getfeat((int *)data); 317 break; 318 default: 319 error = EINVAL; 320 } 321 mtx_unlock(&Giant); 322 return (error); 323 } 324 325 static int cryptodev_cb(void *); 326 327 328 static int 329 cryptodev_op( 330 struct csession *cse, 331 struct crypt_op *cop, 332 struct ucred *active_cred, 333 struct thread *td) 334 { 335 struct cryptop *crp = NULL; 336 struct cryptodesc *crde = NULL, *crda = NULL; 337 int error, len; 338 339 if (cop->len > 256*1024-4) 340 return (E2BIG); 341 342 if (cse->txform) { 343 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 344 return (EINVAL); 345 } 346 347 len = cop->len + (cse->thash ? cse->thash->hashsize : 0); 348 349 cse->buf = malloc(len, M_XDATA, M_WAITOK); 350 351 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 352 if (crp == NULL) { 353 error = ENOMEM; 354 goto bail; 355 } 356 357 if (cse->thash) { 358 crda = crp->crp_desc; 359 if (cse->txform) 360 crde = crda->crd_next; 361 } else { 362 if (cse->txform) 363 crde = crp->crp_desc; 364 else { 365 error = EINVAL; 366 goto bail; 367 } 368 } 369 370 if ((error = copyin(cop->src, cse->buf, cop->len))) 371 goto bail; 372 373 if (crda) { 374 crda->crd_skip = 0; 375 crda->crd_len = cop->len; 376 crda->crd_inject = cop->len; 377 378 crda->crd_alg = cse->mac; 379 crda->crd_key = cse->mackey; 380 crda->crd_klen = cse->mackeylen * 8; 381 } 382 383 if (crde) { 384 if (cop->op == COP_ENCRYPT) 385 crde->crd_flags |= CRD_F_ENCRYPT; 386 else 387 crde->crd_flags &= ~CRD_F_ENCRYPT; 388 crde->crd_len = cop->len; 389 crde->crd_inject = 0; 390 391 crde->crd_alg = cse->cipher; 392 crde->crd_key = cse->key; 393 crde->crd_klen = cse->keylen * 8; 394 } 395 396 crp->crp_ilen = len; 397 crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH); 398 crp->crp_buf = cse->buf; 399 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 400 crp->crp_sid = cse->sid; 401 crp->crp_opaque = (void *)cse; 402 403 if (cop->iv) { 404 if (crde == NULL) { 405 error = EINVAL; 406 goto bail; 407 } 408 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 409 error = EINVAL; 410 goto bail; 411 } 412 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 413 goto bail; 414 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 415 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 416 crde->crd_skip = 0; 417 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 418 crde->crd_skip = 0; 419 } else if (crde) { 420 crde->crd_flags |= CRD_F_IV_PRESENT; 421 crde->crd_skip = cse->txform->blocksize; 422 crde->crd_len -= cse->txform->blocksize; 423 } 424 425 if (cop->mac && crda == NULL) { 426 error = EINVAL; 427 goto bail; 428 } 429 430 /* 431 * Let the dispatch run unlocked, then, interlock against the 432 * callback before checking if the operation completed and going 433 * to sleep. This insures drivers don't inherit our lock which 434 * results in a lock order reversal between crypto_dispatch forced 435 * entry and the crypto_done callback into us. 436 */ 437 error = crypto_dispatch(crp); 438 mtx_lock(&cse->lock); 439 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 440 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 441 mtx_unlock(&cse->lock); 442 443 if (error != 0) 444 goto bail; 445 446 if (crp->crp_etype != 0) { 447 error = crp->crp_etype; 448 goto bail; 449 } 450 451 if (cse->error) { 452 error = cse->error; 453 goto bail; 454 } 455 456 if (cop->dst && (error = copyout(cse->buf, cop->dst, cop->len))) 457 goto bail; 458 459 if (cop->mac && (error = copyout(cse->buf + cop->len, cop->mac, 460 cse->thash->hashsize))) { 461 goto bail; 462 } 463 464 bail: 465 if (crp) 466 crypto_freereq(crp); 467 free(cse->buf, M_XDATA); 468 469 return (error); 470 } 471 472 static int 473 cryptodev_cb(void *op) 474 { 475 struct cryptop *crp = (struct cryptop *) op; 476 struct csession *cse = (struct csession *)crp->crp_opaque; 477 478 cse->error = crp->crp_etype; 479 if (crp->crp_etype == EAGAIN) 480 return crypto_dispatch(crp); 481 mtx_lock(&cse->lock); 482 wakeup_one(crp); 483 mtx_unlock(&cse->lock); 484 return (0); 485 } 486 487 static int 488 cryptodevkey_cb(void *op) 489 { 490 struct cryptkop *krp = (struct cryptkop *) op; 491 492 wakeup(krp); 493 return (0); 494 } 495 496 static int 497 cryptodev_key(struct crypt_kop *kop) 498 { 499 struct cryptkop *krp = NULL; 500 int error = EINVAL; 501 int in, out, size, i; 502 503 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 504 return (EFBIG); 505 } 506 507 in = kop->crk_iparams; 508 out = kop->crk_oparams; 509 switch (kop->crk_op) { 510 case CRK_MOD_EXP: 511 if (in == 3 && out == 1) 512 break; 513 return (EINVAL); 514 case CRK_MOD_EXP_CRT: 515 if (in == 6 && out == 1) 516 break; 517 return (EINVAL); 518 case CRK_DSA_SIGN: 519 if (in == 5 && out == 2) 520 break; 521 return (EINVAL); 522 case CRK_DSA_VERIFY: 523 if (in == 7 && out == 0) 524 break; 525 return (EINVAL); 526 case CRK_DH_COMPUTE_KEY: 527 if (in == 3 && out == 1) 528 break; 529 return (EINVAL); 530 default: 531 return (EINVAL); 532 } 533 534 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 535 if (!krp) 536 return (ENOMEM); 537 krp->krp_op = kop->crk_op; 538 krp->krp_status = kop->crk_status; 539 krp->krp_iparams = kop->crk_iparams; 540 krp->krp_oparams = kop->crk_oparams; 541 krp->krp_status = 0; 542 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 543 544 for (i = 0; i < CRK_MAXPARAM; i++) { 545 if (kop->crk_param[i].crp_nbits > 65536) 546 /* Limit is the same as in OpenBSD */ 547 goto fail; 548 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 549 } 550 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 551 size = (krp->krp_param[i].crp_nbits + 7) / 8; 552 if (size == 0) 553 continue; 554 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 555 if (i >= krp->krp_iparams) 556 continue; 557 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 558 if (error) 559 goto fail; 560 } 561 562 error = crypto_kdispatch(krp); 563 if (error) 564 goto fail; 565 error = tsleep(krp, PSOCK, "crydev", 0); 566 if (error) { 567 /* XXX can this happen? if so, how do we recover? */ 568 goto fail; 569 } 570 571 if (krp->krp_status != 0) { 572 error = krp->krp_status; 573 goto fail; 574 } 575 576 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 577 size = (krp->krp_param[i].crp_nbits + 7) / 8; 578 if (size == 0) 579 continue; 580 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 581 if (error) 582 goto fail; 583 } 584 585 fail: 586 if (krp) { 587 kop->crk_status = krp->krp_status; 588 for (i = 0; i < CRK_MAXPARAM; i++) { 589 if (krp->krp_param[i].crp_p) 590 FREE(krp->krp_param[i].crp_p, M_XDATA); 591 } 592 free(krp, M_XDATA); 593 } 594 return (error); 595 } 596 597 /* ARGSUSED */ 598 static int 599 cryptof_poll( 600 struct file *fp, 601 int events, 602 struct ucred *active_cred, 603 struct thread *td) 604 { 605 606 return (0); 607 } 608 609 /* ARGSUSED */ 610 static int 611 cryptof_kqfilter(struct file *fp, struct knote *kn) 612 { 613 614 return (0); 615 } 616 617 /* ARGSUSED */ 618 static int 619 cryptof_stat( 620 struct file *fp, 621 struct stat *sb, 622 struct ucred *active_cred, 623 struct thread *td) 624 { 625 626 return (EOPNOTSUPP); 627 } 628 629 /* ARGSUSED */ 630 static int 631 cryptof_close(struct file *fp, struct thread *td) 632 { 633 struct fcrypt *fcr = fp->f_data; 634 struct csession *cse; 635 636 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 637 TAILQ_REMOVE(&fcr->csessions, cse, next); 638 (void)csefree(cse); 639 } 640 FREE(fcr, M_XDATA); 641 fp->f_data = NULL; 642 return 0; 643 } 644 645 static struct csession * 646 csefind(struct fcrypt *fcr, u_int ses) 647 { 648 struct csession *cse; 649 650 TAILQ_FOREACH(cse, &fcr->csessions, next) 651 if (cse->ses == ses) 652 return (cse); 653 return (NULL); 654 } 655 656 static int 657 csedelete(struct fcrypt *fcr, struct csession *cse_del) 658 { 659 struct csession *cse; 660 661 TAILQ_FOREACH(cse, &fcr->csessions, next) { 662 if (cse == cse_del) { 663 TAILQ_REMOVE(&fcr->csessions, cse, next); 664 return (1); 665 } 666 } 667 return (0); 668 } 669 670 static struct csession * 671 cseadd(struct fcrypt *fcr, struct csession *cse) 672 { 673 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 674 cse->ses = fcr->sesn++; 675 return (cse); 676 } 677 678 struct csession * 679 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 680 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 681 struct enc_xform *txform, struct auth_hash *thash) 682 { 683 struct csession *cse; 684 685 #ifdef INVARIANTS 686 /* NB: required when mtx_init is built with INVARIANTS */ 687 MALLOC(cse, struct csession *, sizeof(struct csession), 688 M_XDATA, M_NOWAIT | M_ZERO); 689 #else 690 MALLOC(cse, struct csession *, sizeof(struct csession), 691 M_XDATA, M_NOWAIT); 692 #endif 693 if (cse == NULL) 694 return NULL; 695 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 696 cse->key = key; 697 cse->keylen = keylen/8; 698 cse->mackey = mackey; 699 cse->mackeylen = mackeylen/8; 700 cse->sid = sid; 701 cse->cipher = cipher; 702 cse->mac = mac; 703 cse->txform = txform; 704 cse->thash = thash; 705 cseadd(fcr, cse); 706 return (cse); 707 } 708 709 static int 710 csefree(struct csession *cse) 711 { 712 int error; 713 714 error = crypto_freesession(cse->sid); 715 mtx_destroy(&cse->lock); 716 if (cse->key) 717 FREE(cse->key, M_XDATA); 718 if (cse->mackey) 719 FREE(cse->mackey, M_XDATA); 720 FREE(cse, M_XDATA); 721 return (error); 722 } 723 724 static int 725 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 726 { 727 return (0); 728 } 729 730 static int 731 cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 732 { 733 return (EIO); 734 } 735 736 static int 737 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 738 { 739 return (EIO); 740 } 741 742 static int 743 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 744 { 745 struct file *f; 746 struct fcrypt *fcr; 747 int fd, error; 748 749 switch (cmd) { 750 case CRIOGET: 751 MALLOC(fcr, struct fcrypt *, 752 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 753 TAILQ_INIT(&fcr->csessions); 754 fcr->sesn = 0; 755 756 error = falloc(td, &f, &fd); 757 758 if (error) { 759 FREE(fcr, M_XDATA); 760 return (error); 761 } 762 /* falloc automatically provides an extra reference to 'f'. */ 763 f->f_flag = FREAD | FWRITE; 764 f->f_type = DTYPE_CRYPTO; 765 f->f_ops = &cryptofops; 766 f->f_data = fcr; 767 *(u_int32_t *)data = fd; 768 fdrop(f, td); 769 break; 770 default: 771 error = EINVAL; 772 break; 773 } 774 return (error); 775 } 776 777 static struct cdevsw crypto_cdevsw = { 778 .d_version = D_VERSION, 779 .d_flags = D_NEEDGIANT, 780 .d_open = cryptoopen, 781 .d_read = cryptoread, 782 .d_write = cryptowrite, 783 .d_ioctl = cryptoioctl, 784 .d_name = "crypto", 785 }; 786 static struct cdev *crypto_dev; 787 788 /* 789 * Initialization code, both for static and dynamic loading. 790 */ 791 static int 792 cryptodev_modevent(module_t mod, int type, void *unused) 793 { 794 switch (type) { 795 case MOD_LOAD: 796 if (bootverbose) 797 printf("crypto: <crypto device>\n"); 798 crypto_dev = make_dev(&crypto_cdevsw, 0, 799 UID_ROOT, GID_WHEEL, 0666, 800 "crypto"); 801 return 0; 802 case MOD_UNLOAD: 803 /*XXX disallow if active sessions */ 804 destroy_dev(crypto_dev); 805 return 0; 806 } 807 return EINVAL; 808 } 809 810 static moduledata_t cryptodev_mod = { 811 "cryptodev", 812 cryptodev_modevent, 813 0 814 }; 815 MODULE_VERSION(cryptodev, 1); 816 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 817 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 818 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
Cache object: 47c10d9ab17ce8f4a24312de0a140909
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