Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/cryptodev.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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/6.3/sys/opencrypto/cryptodev.c 172575 2007-10-12 10:24:21Z kib $"); 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 default: 182 mtx_unlock(&Giant); 183 return (EINVAL); 184 } 185 186 switch (sop->mac) { 187 case 0: 188 break; 189 case CRYPTO_MD5_HMAC: 190 thash = &auth_hash_hmac_md5; 191 break; 192 case CRYPTO_SHA1_HMAC: 193 thash = &auth_hash_hmac_sha1; 194 break; 195 case CRYPTO_SHA2_256_HMAC: 196 thash = &auth_hash_hmac_sha2_256; 197 break; 198 case CRYPTO_SHA2_384_HMAC: 199 thash = &auth_hash_hmac_sha2_384; 200 break; 201 case CRYPTO_SHA2_512_HMAC: 202 thash = &auth_hash_hmac_sha2_512; 203 break; 204 case CRYPTO_RIPEMD160_HMAC: 205 thash = &auth_hash_hmac_ripemd_160; 206 break; 207 #ifdef notdef 208 case CRYPTO_MD5: 209 thash = &auth_hash_md5; 210 break; 211 case CRYPTO_SHA1: 212 thash = &auth_hash_sha1; 213 break; 214 #endif 215 case CRYPTO_NULL_HMAC: 216 thash = &auth_hash_null; 217 break; 218 default: 219 mtx_unlock(&Giant); 220 return (EINVAL); 221 } 222 223 bzero(&crie, sizeof(crie)); 224 bzero(&cria, sizeof(cria)); 225 226 if (txform) { 227 crie.cri_alg = txform->type; 228 crie.cri_klen = sop->keylen * 8; 229 if (sop->keylen > txform->maxkey || 230 sop->keylen < txform->minkey) { 231 error = EINVAL; 232 goto bail; 233 } 234 235 MALLOC(crie.cri_key, u_int8_t *, 236 crie.cri_klen / 8, M_XDATA, M_WAITOK); 237 if ((error = copyin(sop->key, crie.cri_key, 238 crie.cri_klen / 8))) 239 goto bail; 240 if (thash) 241 crie.cri_next = &cria; 242 } 243 244 if (thash) { 245 cria.cri_alg = thash->type; 246 cria.cri_klen = sop->mackeylen * 8; 247 if (sop->mackeylen != thash->keysize) { 248 error = EINVAL; 249 goto bail; 250 } 251 252 if (cria.cri_klen) { 253 MALLOC(cria.cri_key, u_int8_t *, 254 cria.cri_klen / 8, M_XDATA, M_WAITOK); 255 if ((error = copyin(sop->mackey, cria.cri_key, 256 cria.cri_klen / 8))) 257 goto bail; 258 } 259 } 260 261 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1); 262 if (error) { 263 if (crypto_devallowsoft) { 264 error = crypto_newsession(&sid, 265 (txform ? &crie : &cria), 0); 266 } 267 if (error) 268 goto bail; 269 } 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; 281 282 bail: 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 } 321 322 static int cryptodev_cb(void *); 323 324 325 static int 326 cryptodev_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, len; 335 336 if (cop->len > 256*1024-4) 337 return (E2BIG); 338 339 if (cse->txform) { 340 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 341 return (EINVAL); 342 } 343 344 len = cop->len + (cse->thash ? cse->thash->hashsize : 0); 345 346 cse->buf = malloc(len, M_XDATA, M_WAITOK); 347 348 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 349 if (crp == NULL) { 350 error = ENOMEM; 351 goto bail; 352 } 353 354 if (cse->thash) { 355 crda = crp->crp_desc; 356 if (cse->txform) 357 crde = crda->crd_next; 358 } else { 359 if (cse->txform) 360 crde = crp->crp_desc; 361 else { 362 error = EINVAL; 363 goto bail; 364 } 365 } 366 367 if ((error = copyin(cop->src, cse->buf, cop->len))) 368 goto bail; 369 370 if (crda) { 371 crda->crd_skip = 0; 372 crda->crd_len = cop->len; 373 crda->crd_inject = cop->len; 374 375 crda->crd_alg = cse->mac; 376 crda->crd_key = cse->mackey; 377 crda->crd_klen = cse->mackeylen * 8; 378 } 379 380 if (crde) { 381 if (cop->op == COP_ENCRYPT) 382 crde->crd_flags |= CRD_F_ENCRYPT; 383 else 384 crde->crd_flags &= ~CRD_F_ENCRYPT; 385 crde->crd_len = cop->len; 386 crde->crd_inject = 0; 387 388 crde->crd_alg = cse->cipher; 389 crde->crd_key = cse->key; 390 crde->crd_klen = cse->keylen * 8; 391 } 392 393 crp->crp_ilen = len; 394 crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH); 395 crp->crp_buf = cse->buf; 396 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 397 crp->crp_sid = cse->sid; 398 crp->crp_opaque = (void *)cse; 399 400 if (cop->iv) { 401 if (crde == NULL) { 402 error = EINVAL; 403 goto bail; 404 } 405 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 406 error = EINVAL; 407 goto bail; 408 } 409 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 410 goto bail; 411 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 412 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 413 crde->crd_skip = 0; 414 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 415 crde->crd_skip = 0; 416 } else if (crde) { 417 crde->crd_flags |= CRD_F_IV_PRESENT; 418 crde->crd_skip = cse->txform->blocksize; 419 crde->crd_len -= cse->txform->blocksize; 420 } 421 422 if (cop->mac && crda == NULL) { 423 error = EINVAL; 424 goto bail; 425 } 426 427 /* 428 * Let the dispatch run unlocked, then, interlock against the 429 * callback before checking if the operation completed and going 430 * to sleep. This insures drivers don't inherit our lock which 431 * results in a lock order reversal between crypto_dispatch forced 432 * entry and the crypto_done callback into us. 433 */ 434 error = crypto_dispatch(crp); 435 mtx_lock(&cse->lock); 436 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 437 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 438 mtx_unlock(&cse->lock); 439 440 if (error != 0) 441 goto bail; 442 443 if (crp->crp_etype != 0) { 444 error = crp->crp_etype; 445 goto bail; 446 } 447 448 if (cse->error) { 449 error = cse->error; 450 goto bail; 451 } 452 453 if (cop->dst && (error = copyout(cse->buf, cop->dst, cop->len))) 454 goto bail; 455 456 if (cop->mac && (error = copyout(cse->buf + cop->len, cop->mac, 457 cse->thash->hashsize))) { 458 goto bail; 459 } 460 461 bail: 462 if (crp) 463 crypto_freereq(crp); 464 free(cse->buf, M_XDATA); 465 466 return (error); 467 } 468 469 static int 470 cryptodev_cb(void *op) 471 { 472 struct cryptop *crp = (struct cryptop *) op; 473 struct csession *cse = (struct csession *)crp->crp_opaque; 474 475 cse->error = crp->crp_etype; 476 if (crp->crp_etype == EAGAIN) 477 return crypto_dispatch(crp); 478 mtx_lock(&cse->lock); 479 wakeup_one(crp); 480 mtx_unlock(&cse->lock); 481 return (0); 482 } 483 484 static int 485 cryptodevkey_cb(void *op) 486 { 487 struct cryptkop *krp = (struct cryptkop *) op; 488 489 wakeup(krp); 490 return (0); 491 } 492 493 static int 494 cryptodev_key(struct crypt_kop *kop) 495 { 496 struct cryptkop *krp = NULL; 497 int error = EINVAL; 498 int in, out, size, i; 499 500 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 501 return (EFBIG); 502 } 503 504 in = kop->crk_iparams; 505 out = kop->crk_oparams; 506 switch (kop->crk_op) { 507 case CRK_MOD_EXP: 508 if (in == 3 && out == 1) 509 break; 510 return (EINVAL); 511 case CRK_MOD_EXP_CRT: 512 if (in == 6 && out == 1) 513 break; 514 return (EINVAL); 515 case CRK_DSA_SIGN: 516 if (in == 5 && out == 2) 517 break; 518 return (EINVAL); 519 case CRK_DSA_VERIFY: 520 if (in == 7 && out == 0) 521 break; 522 return (EINVAL); 523 case CRK_DH_COMPUTE_KEY: 524 if (in == 3 && out == 1) 525 break; 526 return (EINVAL); 527 default: 528 return (EINVAL); 529 } 530 531 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 532 if (!krp) 533 return (ENOMEM); 534 krp->krp_op = kop->crk_op; 535 krp->krp_status = kop->crk_status; 536 krp->krp_iparams = kop->crk_iparams; 537 krp->krp_oparams = kop->crk_oparams; 538 krp->krp_status = 0; 539 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 540 541 for (i = 0; i < CRK_MAXPARAM; i++) { 542 if (kop->crk_param[i].crp_nbits > 65536) 543 /* Limit is the same as in OpenBSD */ 544 goto fail; 545 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 546 } 547 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 548 size = (krp->krp_param[i].crp_nbits + 7) / 8; 549 if (size == 0) 550 continue; 551 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 552 if (i >= krp->krp_iparams) 553 continue; 554 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 555 if (error) 556 goto fail; 557 } 558 559 error = crypto_kdispatch(krp); 560 if (error) 561 goto fail; 562 error = tsleep(krp, PSOCK, "crydev", 0); 563 if (error) { 564 /* XXX can this happen? if so, how do we recover? */ 565 goto fail; 566 } 567 568 if (krp->krp_status != 0) { 569 error = krp->krp_status; 570 goto fail; 571 } 572 573 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 574 size = (krp->krp_param[i].crp_nbits + 7) / 8; 575 if (size == 0) 576 continue; 577 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 578 if (error) 579 goto fail; 580 } 581 582 fail: 583 if (krp) { 584 kop->crk_status = krp->krp_status; 585 for (i = 0; i < CRK_MAXPARAM; i++) { 586 if (krp->krp_param[i].crp_p) 587 FREE(krp->krp_param[i].crp_p, M_XDATA); 588 } 589 free(krp, M_XDATA); 590 } 591 return (error); 592 } 593 594 /* ARGSUSED */ 595 static int 596 cryptof_poll( 597 struct file *fp, 598 int events, 599 struct ucred *active_cred, 600 struct thread *td) 601 { 602 603 return (0); 604 } 605 606 /* ARGSUSED */ 607 static int 608 cryptof_kqfilter(struct file *fp, struct knote *kn) 609 { 610 611 return (0); 612 } 613 614 /* ARGSUSED */ 615 static int 616 cryptof_stat( 617 struct file *fp, 618 struct stat *sb, 619 struct ucred *active_cred, 620 struct thread *td) 621 { 622 623 return (EOPNOTSUPP); 624 } 625 626 /* ARGSUSED */ 627 static int 628 cryptof_close(struct file *fp, struct thread *td) 629 { 630 struct fcrypt *fcr = fp->f_data; 631 struct csession *cse; 632 633 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 634 TAILQ_REMOVE(&fcr->csessions, cse, next); 635 (void)csefree(cse); 636 } 637 FREE(fcr, M_XDATA); 638 fp->f_data = NULL; 639 return 0; 640 } 641 642 static struct csession * 643 csefind(struct fcrypt *fcr, u_int ses) 644 { 645 struct csession *cse; 646 647 TAILQ_FOREACH(cse, &fcr->csessions, next) 648 if (cse->ses == ses) 649 return (cse); 650 return (NULL); 651 } 652 653 static int 654 csedelete(struct fcrypt *fcr, struct csession *cse_del) 655 { 656 struct csession *cse; 657 658 TAILQ_FOREACH(cse, &fcr->csessions, next) { 659 if (cse == cse_del) { 660 TAILQ_REMOVE(&fcr->csessions, cse, next); 661 return (1); 662 } 663 } 664 return (0); 665 } 666 667 static struct csession * 668 cseadd(struct fcrypt *fcr, struct csession *cse) 669 { 670 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 671 cse->ses = fcr->sesn++; 672 return (cse); 673 } 674 675 struct csession * 676 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 677 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 678 struct enc_xform *txform, struct auth_hash *thash) 679 { 680 struct csession *cse; 681 682 #ifdef INVARIANTS 683 /* NB: required when mtx_init is built with INVARIANTS */ 684 MALLOC(cse, struct csession *, sizeof(struct csession), 685 M_XDATA, M_NOWAIT | M_ZERO); 686 #else 687 MALLOC(cse, struct csession *, sizeof(struct csession), 688 M_XDATA, M_NOWAIT); 689 #endif 690 if (cse == NULL) 691 return NULL; 692 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 693 cse->key = key; 694 cse->keylen = keylen/8; 695 cse->mackey = mackey; 696 cse->mackeylen = mackeylen/8; 697 cse->sid = sid; 698 cse->cipher = cipher; 699 cse->mac = mac; 700 cse->txform = txform; 701 cse->thash = thash; 702 cseadd(fcr, cse); 703 return (cse); 704 } 705 706 static int 707 csefree(struct csession *cse) 708 { 709 int error; 710 711 error = crypto_freesession(cse->sid); 712 mtx_destroy(&cse->lock); 713 if (cse->key) 714 FREE(cse->key, M_XDATA); 715 if (cse->mackey) 716 FREE(cse->mackey, M_XDATA); 717 FREE(cse, M_XDATA); 718 return (error); 719 } 720 721 static int 722 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 723 { 724 return (0); 725 } 726 727 static int 728 cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 729 { 730 return (EIO); 731 } 732 733 static int 734 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 735 { 736 return (EIO); 737 } 738 739 static int 740 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 741 { 742 struct file *f; 743 struct fcrypt *fcr; 744 int fd, error; 745 746 switch (cmd) { 747 case CRIOGET: 748 MALLOC(fcr, struct fcrypt *, 749 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 750 TAILQ_INIT(&fcr->csessions); 751 fcr->sesn = 0; 752 753 error = falloc(td, &f, &fd); 754 755 if (error) { 756 FREE(fcr, M_XDATA); 757 return (error); 758 } 759 /* falloc automatically provides an extra reference to 'f'. */ 760 f->f_flag = FREAD | FWRITE; 761 f->f_type = DTYPE_CRYPTO; 762 f->f_ops = &cryptofops; 763 f->f_data = fcr; 764 *(u_int32_t *)data = fd; 765 fdrop(f, td); 766 break; 767 default: 768 error = EINVAL; 769 break; 770 } 771 return (error); 772 } 773 774 static struct cdevsw crypto_cdevsw = { 775 .d_version = D_VERSION, 776 .d_flags = D_NEEDGIANT, 777 .d_open = cryptoopen, 778 .d_read = cryptoread, 779 .d_write = cryptowrite, 780 .d_ioctl = cryptoioctl, 781 .d_name = "crypto", 782 }; 783 static struct cdev *crypto_dev; 784 785 /* 786 * Initialization code, both for static and dynamic loading. 787 */ 788 static int 789 cryptodev_modevent(module_t mod, int type, void *unused) 790 { 791 switch (type) { 792 case MOD_LOAD: 793 if (bootverbose) 794 printf("crypto: <crypto device>\n"); 795 crypto_dev = make_dev(&crypto_cdevsw, 0, 796 UID_ROOT, GID_WHEEL, 0666, 797 "crypto"); 798 return 0; 799 case MOD_UNLOAD: 800 /*XXX disallow if active sessions */ 801 destroy_dev(crypto_dev); 802 return 0; 803 } 804 return EINVAL; 805 } 806 807 static moduledata_t cryptodev_mod = { 808 "cryptodev", 809 cryptodev_modevent, 810 0 811 }; 812 MODULE_VERSION(cryptodev, 1); 813 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 814 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 815 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
Cache object: 78bc632fb580822947cf7b966e971d2e
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]