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/5.4/sys/opencrypto/cryptodev.c 141090 2005-01-31 23:27:04Z imp $"); 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 57 struct 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 81 struct fcrypt { 82 TAILQ_HEAD(csessionlist, csession) csessions; 83 int sesn; 84 }; 85 86 static int cryptof_rw(struct file *fp, struct uio *uio, 87 struct ucred *cred, int flags, struct thread *); 88 static int cryptof_ioctl(struct file *, u_long, void *, 89 struct ucred *, struct thread *); 90 static int cryptof_poll(struct file *, int, struct ucred *, struct thread *); 91 static int cryptof_kqfilter(struct file *, struct knote *); 92 static int cryptof_stat(struct file *, struct stat *, 93 struct ucred *, struct thread *); 94 static int cryptof_close(struct file *, struct thread *); 95 96 static 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 }; 105 106 static struct csession *csefind(struct fcrypt *, u_int); 107 static int csedelete(struct fcrypt *, struct csession *); 108 static struct csession *cseadd(struct fcrypt *, struct csession *); 109 static 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 *); 112 static int csefree(struct csession *); 113 114 static int cryptodev_op(struct csession *, struct crypt_op *, 115 struct ucred *, struct thread *td); 116 static int cryptodev_key(struct crypt_kop *); 117 118 static int 119 cryptof_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 */ 131 static int 132 cryptof_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 switch (cmd) { 151 case CIOCGSESSION: 152 sop = (struct session_op *)data; 153 switch (sop->cipher) { 154 case 0: 155 break; 156 case CRYPTO_DES_CBC: 157 txform = &enc_xform_des; 158 break; 159 case CRYPTO_3DES_CBC: 160 txform = &enc_xform_3des; 161 break; 162 case CRYPTO_BLF_CBC: 163 txform = &enc_xform_blf; 164 break; 165 case CRYPTO_CAST_CBC: 166 txform = &enc_xform_cast5; 167 break; 168 case CRYPTO_SKIPJACK_CBC: 169 txform = &enc_xform_skipjack; 170 break; 171 case CRYPTO_AES_CBC: 172 txform = &enc_xform_rijndael128; 173 break; 174 case CRYPTO_NULL_CBC: 175 txform = &enc_xform_null; 176 break; 177 case CRYPTO_ARC4: 178 txform = &enc_xform_arc4; 179 break; 180 default: 181 return (EINVAL); 182 } 183 184 switch (sop->mac) { 185 case 0: 186 break; 187 case CRYPTO_MD5_HMAC: 188 thash = &auth_hash_hmac_md5_96; 189 break; 190 case CRYPTO_SHA1_HMAC: 191 thash = &auth_hash_hmac_sha1_96; 192 break; 193 case CRYPTO_SHA2_HMAC: 194 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 195 thash = &auth_hash_hmac_sha2_256; 196 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 197 thash = &auth_hash_hmac_sha2_384; 198 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 199 thash = &auth_hash_hmac_sha2_512; 200 else 201 return (EINVAL); 202 break; 203 case CRYPTO_RIPEMD160_HMAC: 204 thash = &auth_hash_hmac_ripemd_160_96; 205 break; 206 #ifdef notdef 207 case CRYPTO_MD5: 208 thash = &auth_hash_md5; 209 break; 210 case CRYPTO_SHA1: 211 thash = &auth_hash_sha1; 212 break; 213 #endif 214 case CRYPTO_NULL_HMAC: 215 thash = &auth_hash_null; 216 break; 217 default: 218 return (EINVAL); 219 } 220 221 bzero(&crie, sizeof(crie)); 222 bzero(&cria, sizeof(cria)); 223 224 if (txform) { 225 crie.cri_alg = txform->type; 226 crie.cri_klen = sop->keylen * 8; 227 if (sop->keylen > txform->maxkey || 228 sop->keylen < txform->minkey) { 229 error = EINVAL; 230 goto bail; 231 } 232 233 MALLOC(crie.cri_key, u_int8_t *, 234 crie.cri_klen / 8, M_XDATA, M_WAITOK); 235 if ((error = copyin(sop->key, crie.cri_key, 236 crie.cri_klen / 8))) 237 goto bail; 238 if (thash) 239 crie.cri_next = &cria; 240 } 241 242 if (thash) { 243 cria.cri_alg = thash->type; 244 cria.cri_klen = sop->mackeylen * 8; 245 if (sop->mackeylen != thash->keysize) { 246 error = EINVAL; 247 goto bail; 248 } 249 250 if (cria.cri_klen) { 251 MALLOC(cria.cri_key, u_int8_t *, 252 cria.cri_klen / 8, M_XDATA, M_WAITOK); 253 if ((error = copyin(sop->mackey, cria.cri_key, 254 cria.cri_klen / 8))) 255 goto bail; 256 } 257 } 258 259 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1); 260 if (error) 261 goto bail; 262 263 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 264 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 265 thash); 266 267 if (cse == NULL) { 268 crypto_freesession(sid); 269 error = EINVAL; 270 goto bail; 271 } 272 sop->ses = cse->ses; 273 274 bail: 275 if (error) { 276 if (crie.cri_key) 277 FREE(crie.cri_key, M_XDATA); 278 if (cria.cri_key) 279 FREE(cria.cri_key, M_XDATA); 280 } 281 break; 282 case CIOCFSESSION: 283 ses = *(u_int32_t *)data; 284 cse = csefind(fcr, ses); 285 if (cse == NULL) 286 return (EINVAL); 287 csedelete(fcr, cse); 288 error = csefree(cse); 289 break; 290 case CIOCCRYPT: 291 cop = (struct crypt_op *)data; 292 cse = csefind(fcr, cop->ses); 293 if (cse == NULL) 294 return (EINVAL); 295 error = cryptodev_op(cse, cop, active_cred, td); 296 break; 297 case CIOCKEY: 298 error = cryptodev_key((struct crypt_kop *)data); 299 break; 300 case CIOCASYMFEAT: 301 error = crypto_getfeat((int *)data); 302 break; 303 default: 304 error = EINVAL; 305 } 306 return (error); 307 } 308 309 static int cryptodev_cb(void *); 310 311 312 static int 313 cryptodev_op( 314 struct csession *cse, 315 struct crypt_op *cop, 316 struct ucred *active_cred, 317 struct thread *td) 318 { 319 struct cryptop *crp = NULL; 320 struct cryptodesc *crde = NULL, *crda = NULL; 321 int error; 322 323 if (cop->len > 256*1024-4) 324 return (E2BIG); 325 326 if (cse->txform && (cop->len % cse->txform->blocksize) != 0) 327 return (EINVAL); 328 329 cse->uio.uio_iov = &cse->iovec; 330 cse->uio.uio_iovcnt = 1; 331 cse->uio.uio_offset = 0; 332 cse->uio.uio_resid = cop->len; 333 cse->uio.uio_segflg = UIO_SYSSPACE; 334 cse->uio.uio_rw = UIO_WRITE; 335 cse->uio.uio_td = td; 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); 338 339 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 /* 423 * Let the dispatch run unlocked, then, interlock against the 424 * callback before checking if the operation completed and going 425 * to sleep. This insures drivers don't inherit our lock which 426 * results in a lock order reversal between crypto_dispatch forced 427 * entry and the crypto_done callback into us. 428 */ 429 error = crypto_dispatch(crp); 430 mtx_lock(&cse->lock); 431 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 432 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 433 mtx_unlock(&cse->lock); 434 435 if (error != 0) 436 goto bail; 437 438 if (crp->crp_etype != 0) { 439 error = crp->crp_etype; 440 goto bail; 441 } 442 443 if (cse->error) { 444 error = cse->error; 445 goto bail; 446 } 447 448 if (cop->dst && 449 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 450 goto bail; 451 452 if (cop->mac && 453 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 454 goto bail; 455 456 bail: 457 if (crp) 458 crypto_freereq(crp); 459 if (cse->uio.uio_iov[0].iov_base) 460 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 461 462 return (error); 463 } 464 465 static int 466 cryptodev_cb(void *op) 467 { 468 struct cryptop *crp = (struct cryptop *) op; 469 struct csession *cse = (struct csession *)crp->crp_opaque; 470 471 cse->error = crp->crp_etype; 472 if (crp->crp_etype == EAGAIN) 473 return crypto_dispatch(crp); 474 mtx_lock(&cse->lock); 475 wakeup_one(crp); 476 mtx_unlock(&cse->lock); 477 return (0); 478 } 479 480 static int 481 cryptodevkey_cb(void *op) 482 { 483 struct cryptkop *krp = (struct cryptkop *) op; 484 485 wakeup(krp); 486 return (0); 487 } 488 489 static int 490 cryptodev_key(struct crypt_kop *kop) 491 { 492 struct cryptkop *krp = NULL; 493 int error = EINVAL; 494 int in, out, size, i; 495 496 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 497 return (EFBIG); 498 } 499 500 in = kop->crk_iparams; 501 out = kop->crk_oparams; 502 switch (kop->crk_op) { 503 case CRK_MOD_EXP: 504 if (in == 3 && out == 1) 505 break; 506 return (EINVAL); 507 case CRK_MOD_EXP_CRT: 508 if (in == 6 && out == 1) 509 break; 510 return (EINVAL); 511 case CRK_DSA_SIGN: 512 if (in == 5 && out == 2) 513 break; 514 return (EINVAL); 515 case CRK_DSA_VERIFY: 516 if (in == 7 && out == 0) 517 break; 518 return (EINVAL); 519 case CRK_DH_COMPUTE_KEY: 520 if (in == 3 && out == 1) 521 break; 522 return (EINVAL); 523 default: 524 return (EINVAL); 525 } 526 527 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 528 if (!krp) 529 return (ENOMEM); 530 bzero(krp, sizeof *krp); 531 krp->krp_op = kop->crk_op; 532 krp->krp_status = kop->crk_status; 533 krp->krp_iparams = kop->crk_iparams; 534 krp->krp_oparams = kop->crk_oparams; 535 krp->krp_status = 0; 536 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 537 538 for (i = 0; i < CRK_MAXPARAM; i++) 539 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 540 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 541 size = (krp->krp_param[i].crp_nbits + 7) / 8; 542 if (size == 0) 543 continue; 544 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 545 if (i >= krp->krp_iparams) 546 continue; 547 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 548 if (error) 549 goto fail; 550 } 551 552 error = crypto_kdispatch(krp); 553 if (error) 554 goto fail; 555 error = tsleep(krp, PSOCK, "crydev", 0); 556 if (error) { 557 /* XXX can this happen? if so, how do we recover? */ 558 goto fail; 559 } 560 561 if (krp->krp_status != 0) { 562 error = krp->krp_status; 563 goto fail; 564 } 565 566 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 567 size = (krp->krp_param[i].crp_nbits + 7) / 8; 568 if (size == 0) 569 continue; 570 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 571 if (error) 572 goto fail; 573 } 574 575 fail: 576 if (krp) { 577 kop->crk_status = krp->krp_status; 578 for (i = 0; i < CRK_MAXPARAM; i++) { 579 if (krp->krp_param[i].crp_p) 580 FREE(krp->krp_param[i].crp_p, M_XDATA); 581 } 582 free(krp, M_XDATA); 583 } 584 return (error); 585 } 586 587 /* ARGSUSED */ 588 static int 589 cryptof_poll( 590 struct file *fp, 591 int events, 592 struct ucred *active_cred, 593 struct thread *td) 594 { 595 596 return (0); 597 } 598 599 /* ARGSUSED */ 600 static int 601 cryptof_kqfilter(struct file *fp, struct knote *kn) 602 { 603 604 return (0); 605 } 606 607 /* ARGSUSED */ 608 static int 609 cryptof_stat( 610 struct file *fp, 611 struct stat *sb, 612 struct ucred *active_cred, 613 struct thread *td) 614 { 615 616 return (EOPNOTSUPP); 617 } 618 619 /* ARGSUSED */ 620 static int 621 cryptof_close(struct file *fp, struct thread *td) 622 { 623 struct fcrypt *fcr = fp->f_data; 624 struct csession *cse; 625 626 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 627 TAILQ_REMOVE(&fcr->csessions, cse, next); 628 (void)csefree(cse); 629 } 630 FREE(fcr, M_XDATA); 631 fp->f_data = NULL; 632 return 0; 633 } 634 635 static struct csession * 636 csefind(struct fcrypt *fcr, u_int ses) 637 { 638 struct csession *cse; 639 640 TAILQ_FOREACH(cse, &fcr->csessions, next) 641 if (cse->ses == ses) 642 return (cse); 643 return (NULL); 644 } 645 646 static int 647 csedelete(struct fcrypt *fcr, struct csession *cse_del) 648 { 649 struct csession *cse; 650 651 TAILQ_FOREACH(cse, &fcr->csessions, next) { 652 if (cse == cse_del) { 653 TAILQ_REMOVE(&fcr->csessions, cse, next); 654 return (1); 655 } 656 } 657 return (0); 658 } 659 660 static struct csession * 661 cseadd(struct fcrypt *fcr, struct csession *cse) 662 { 663 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 664 cse->ses = fcr->sesn++; 665 return (cse); 666 } 667 668 struct csession * 669 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 670 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 671 struct enc_xform *txform, struct auth_hash *thash) 672 { 673 struct csession *cse; 674 675 #ifdef INVARIANTS 676 /* NB: required when mtx_init is built with INVARIANTS */ 677 MALLOC(cse, struct csession *, sizeof(struct csession), 678 M_XDATA, M_NOWAIT | M_ZERO); 679 #else 680 MALLOC(cse, struct csession *, sizeof(struct csession), 681 M_XDATA, M_NOWAIT); 682 #endif 683 if (cse == NULL) 684 return NULL; 685 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 686 cse->key = key; 687 cse->keylen = keylen/8; 688 cse->mackey = mackey; 689 cse->mackeylen = mackeylen/8; 690 cse->sid = sid; 691 cse->cipher = cipher; 692 cse->mac = mac; 693 cse->txform = txform; 694 cse->thash = thash; 695 cseadd(fcr, cse); 696 return (cse); 697 } 698 699 static int 700 csefree(struct csession *cse) 701 { 702 int error; 703 704 error = crypto_freesession(cse->sid); 705 mtx_destroy(&cse->lock); 706 if (cse->key) 707 FREE(cse->key, M_XDATA); 708 if (cse->mackey) 709 FREE(cse->mackey, M_XDATA); 710 FREE(cse, M_XDATA); 711 return (error); 712 } 713 714 static int 715 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 716 { 717 return (0); 718 } 719 720 static int 721 cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 722 { 723 return (EIO); 724 } 725 726 static int 727 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 728 { 729 return (EIO); 730 } 731 732 static int 733 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 734 { 735 struct file *f; 736 struct fcrypt *fcr; 737 int fd, error; 738 739 switch (cmd) { 740 case CRIOGET: 741 MALLOC(fcr, struct fcrypt *, 742 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 743 TAILQ_INIT(&fcr->csessions); 744 fcr->sesn = 0; 745 746 error = falloc(td, &f, &fd); 747 748 if (error) { 749 FREE(fcr, M_XDATA); 750 return (error); 751 } 752 /* falloc automatically provides an extra reference to 'f'. */ 753 f->f_flag = FREAD | FWRITE; 754 f->f_type = DTYPE_CRYPTO; 755 f->f_ops = &cryptofops; 756 f->f_data = fcr; 757 *(u_int32_t *)data = fd; 758 fdrop(f, td); 759 break; 760 default: 761 error = EINVAL; 762 break; 763 } 764 return (error); 765 } 766 767 #define CRYPTO_MAJOR 70 /* from openbsd */ 768 static struct cdevsw crypto_cdevsw = { 769 .d_version = D_VERSION, 770 .d_flags = D_NEEDGIANT, 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 }; 778 static struct cdev *crypto_dev; 779 780 /* 781 * Initialization code, both for static and dynamic loading. 782 */ 783 static int 784 cryptodev_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 } 801 802 static moduledata_t cryptodev_mod = { 803 "cryptodev", 804 cryptodev_modevent, 805 0 806 }; 807 MODULE_VERSION(cryptodev, 1); 808 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 809 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
Cache object: b0beee59b89d3c22c8cd0c770600bd95
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