cryptodev.c revision 262994
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 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * Effort sponsored in part by the Defense Advanced Research Projects 31 * Agency (DARPA) and Air Force Research Laboratory, Air Force 32 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 33 */ 34 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD: head/sys/opencrypto/cryptodev.c 262994 2014-03-11 01:45:46Z jmg $"); 37 38#include "opt_compat.h" 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/malloc.h> 43#include <sys/mbuf.h> 44#include <sys/lock.h> 45#include <sys/mutex.h> 46#include <sys/sysctl.h> 47#include <sys/file.h> 48#include <sys/filedesc.h> 49#include <sys/errno.h> 50#include <sys/uio.h> 51#include <sys/random.h> 52#include <sys/conf.h> 53#include <sys/kernel.h> 54#include <sys/module.h> 55#include <sys/fcntl.h> 56#include <sys/bus.h> 57 58#include <opencrypto/cryptodev.h> 59#include <opencrypto/xform.h> 60 61#ifdef COMPAT_FREEBSD32 62#include <sys/mount.h> 63#include <compat/freebsd32/freebsd32.h> 64 65struct session_op32 { 66 u_int32_t cipher; 67 u_int32_t mac; 68 u_int32_t keylen; 69 u_int32_t key; 70 int mackeylen; 71 u_int32_t mackey; 72 u_int32_t ses; 73}; 74 75struct session2_op32 { 76 u_int32_t cipher; 77 u_int32_t mac; 78 u_int32_t keylen; 79 u_int32_t key; 80 int mackeylen; 81 u_int32_t mackey; 82 u_int32_t ses; 83 int crid; 84 int pad[4]; 85}; 86 87struct crypt_op32 { 88 u_int32_t ses; 89 u_int16_t op; 90 u_int16_t flags; 91 u_int len; 92 u_int32_t src, dst; 93 u_int32_t mac; 94 u_int32_t iv; 95}; 96 97struct crparam32 { 98 u_int32_t crp_p; 99 u_int crp_nbits; 100}; 101 102struct crypt_kop32 { 103 u_int crk_op; 104 u_int crk_status; 105 u_short crk_iparams; 106 u_short crk_oparams; 107 u_int crk_crid; 108 struct crparam32 crk_param[CRK_MAXPARAM]; 109}; 110 111struct cryptotstat32 { 112 struct timespec32 acc; 113 struct timespec32 min; 114 struct timespec32 max; 115 u_int32_t count; 116}; 117 118struct cryptostats32 { 119 u_int32_t cs_ops; 120 u_int32_t cs_errs; 121 u_int32_t cs_kops; 122 u_int32_t cs_kerrs; 123 u_int32_t cs_intrs; 124 u_int32_t cs_rets; 125 u_int32_t cs_blocks; 126 u_int32_t cs_kblocks; 127 struct cryptotstat32 cs_invoke; 128 struct cryptotstat32 cs_done; 129 struct cryptotstat32 cs_cb; 130 struct cryptotstat32 cs_finis; 131}; 132 133#define CIOCGSESSION32 _IOWR('c', 101, struct session_op32) 134#define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32) 135#define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32) 136#define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32) 137#define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32) 138 139static void 140session_op_from_32(const struct session_op32 *from, struct session_op *to) 141{ 142 143 CP(*from, *to, cipher); 144 CP(*from, *to, mac); 145 CP(*from, *to, keylen); 146 PTRIN_CP(*from, *to, key); 147 CP(*from, *to, mackeylen); 148 PTRIN_CP(*from, *to, mackey); 149 CP(*from, *to, ses); 150} 151 152static void 153session2_op_from_32(const struct session2_op32 *from, struct session2_op *to) 154{ 155 156 session_op_from_32((const struct session_op32 *)from, 157 (struct session_op *)to); 158 CP(*from, *to, crid); 159} 160 161static void 162session_op_to_32(const struct session_op *from, struct session_op32 *to) 163{ 164 165 CP(*from, *to, cipher); 166 CP(*from, *to, mac); 167 CP(*from, *to, keylen); 168 PTROUT_CP(*from, *to, key); 169 CP(*from, *to, mackeylen); 170 PTROUT_CP(*from, *to, mackey); 171 CP(*from, *to, ses); 172} 173 174static void 175session2_op_to_32(const struct session2_op *from, struct session2_op32 *to) 176{ 177 178 session_op_to_32((const struct session_op *)from, 179 (struct session_op32 *)to); 180 CP(*from, *to, crid); 181} 182 183static void 184crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to) 185{ 186 187 CP(*from, *to, ses); 188 CP(*from, *to, op); 189 CP(*from, *to, flags); 190 CP(*from, *to, len); 191 PTRIN_CP(*from, *to, src); 192 PTRIN_CP(*from, *to, dst); 193 PTRIN_CP(*from, *to, mac); 194 PTRIN_CP(*from, *to, iv); 195} 196 197static void 198crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to) 199{ 200 201 CP(*from, *to, ses); 202 CP(*from, *to, op); 203 CP(*from, *to, flags); 204 CP(*from, *to, len); 205 PTROUT_CP(*from, *to, src); 206 PTROUT_CP(*from, *to, dst); 207 PTROUT_CP(*from, *to, mac); 208 PTROUT_CP(*from, *to, iv); 209} 210 211static void 212crparam_from_32(const struct crparam32 *from, struct crparam *to) 213{ 214 215 PTRIN_CP(*from, *to, crp_p); 216 CP(*from, *to, crp_nbits); 217} 218 219static void 220crparam_to_32(const struct crparam *from, struct crparam32 *to) 221{ 222 223 PTROUT_CP(*from, *to, crp_p); 224 CP(*from, *to, crp_nbits); 225} 226 227static void 228crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to) 229{ 230 int i; 231 232 CP(*from, *to, crk_op); 233 CP(*from, *to, crk_status); 234 CP(*from, *to, crk_iparams); 235 CP(*from, *to, crk_oparams); 236 CP(*from, *to, crk_crid); 237 for (i = 0; i < CRK_MAXPARAM; i++) 238 crparam_from_32(&from->crk_param[i], &to->crk_param[i]); 239} 240 241static void 242crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to) 243{ 244 int i; 245 246 CP(*from, *to, crk_op); 247 CP(*from, *to, crk_status); 248 CP(*from, *to, crk_iparams); 249 CP(*from, *to, crk_oparams); 250 CP(*from, *to, crk_crid); 251 for (i = 0; i < CRK_MAXPARAM; i++) 252 crparam_to_32(&from->crk_param[i], &to->crk_param[i]); 253} 254#endif 255 256struct csession { 257 TAILQ_ENTRY(csession) next; 258 u_int64_t sid; 259 u_int32_t ses; 260 struct mtx lock; /* for op submission */ 261 262 u_int32_t cipher; 263 struct enc_xform *txform; 264 u_int32_t mac; 265 struct auth_hash *thash; 266 267 caddr_t key; 268 int keylen; 269 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 270 271 caddr_t mackey; 272 int mackeylen; 273 274 struct iovec iovec; 275 struct uio uio; 276 int error; 277}; 278 279struct fcrypt { 280 TAILQ_HEAD(csessionlist, csession) csessions; 281 int sesn; 282}; 283 284static int cryptof_rw(struct file *fp, struct uio *uio, 285 struct ucred *cred, int flags, struct thread *); 286static int cryptof_truncate(struct file *, off_t, struct ucred *, 287 struct thread *); 288static int cryptof_ioctl(struct file *, u_long, void *, 289 struct ucred *, struct thread *); 290static int cryptof_poll(struct file *, int, struct ucred *, struct thread *); 291static int cryptof_kqfilter(struct file *, struct knote *); 292static int cryptof_stat(struct file *, struct stat *, 293 struct ucred *, struct thread *); 294static int cryptof_close(struct file *, struct thread *); 295 296static struct fileops cryptofops = { 297 .fo_read = cryptof_rw, 298 .fo_write = cryptof_rw, 299 .fo_truncate = cryptof_truncate, 300 .fo_ioctl = cryptof_ioctl, 301 .fo_poll = cryptof_poll, 302 .fo_kqfilter = cryptof_kqfilter, 303 .fo_stat = cryptof_stat, 304 .fo_close = cryptof_close, 305 .fo_chmod = invfo_chmod, 306 .fo_chown = invfo_chown, 307 .fo_sendfile = invfo_sendfile, 308}; 309 310static struct csession *csefind(struct fcrypt *, u_int); 311static int csedelete(struct fcrypt *, struct csession *); 312static struct csession *cseadd(struct fcrypt *, struct csession *); 313static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, 314 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 315 struct auth_hash *); 316static int csefree(struct csession *); 317 318static int cryptodev_op(struct csession *, struct crypt_op *, 319 struct ucred *, struct thread *td); 320static int cryptodev_key(struct crypt_kop *); 321static int cryptodev_find(struct crypt_find_op *); 322 323static int 324cryptof_rw( 325 struct file *fp, 326 struct uio *uio, 327 struct ucred *active_cred, 328 int flags, 329 struct thread *td) 330{ 331 332 return (EIO); 333} 334 335static int 336cryptof_truncate( 337 struct file *fp, 338 off_t length, 339 struct ucred *active_cred, 340 struct thread *td) 341{ 342 343 return (EINVAL); 344} 345 346/* 347 * Check a crypto identifier to see if it requested 348 * a software device/driver. This can be done either 349 * by device name/class or through search constraints. 350 */ 351static int 352checkforsoftware(int crid) 353{ 354 355 if (!crypto_devallowsoft) { 356 if (crid & CRYPTOCAP_F_SOFTWARE) 357 return EINVAL; /* XXX */ 358 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 359 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 360 return EINVAL; /* XXX */ 361 } 362 return 0; 363} 364 365/* ARGSUSED */ 366static int 367cryptof_ioctl( 368 struct file *fp, 369 u_long cmd, 370 void *data, 371 struct ucred *active_cred, 372 struct thread *td) 373{ 374#define SES2(p) ((struct session2_op *)p) 375 struct cryptoini cria, crie; 376 struct fcrypt *fcr = fp->f_data; 377 struct csession *cse; 378 struct session_op *sop; 379 struct crypt_op *cop; 380 struct enc_xform *txform = NULL; 381 struct auth_hash *thash = NULL; 382 struct crypt_kop *kop; 383 u_int64_t sid; 384 u_int32_t ses; 385 int error = 0, crid; 386#ifdef COMPAT_FREEBSD32 387 struct session2_op sopc; 388 struct crypt_op copc; 389 struct crypt_kop kopc; 390#endif 391 392 switch (cmd) { 393 case CIOCGSESSION: 394 case CIOCGSESSION2: 395#ifdef COMPAT_FREEBSD32 396 case CIOCGSESSION32: 397 case CIOCGSESSION232: 398 if (cmd == CIOCGSESSION32) { 399 session_op_from_32(data, (struct session_op *)&sopc); 400 sop = (struct session_op *)&sopc; 401 } else if (cmd == CIOCGSESSION232) { 402 session2_op_from_32(data, &sopc); 403 sop = (struct session_op *)&sopc; 404 } else 405#endif 406 sop = (struct session_op *)data; 407 switch (sop->cipher) { 408 case 0: 409 break; 410 case CRYPTO_DES_CBC: 411 txform = &enc_xform_des; 412 break; 413 case CRYPTO_3DES_CBC: 414 txform = &enc_xform_3des; 415 break; 416 case CRYPTO_BLF_CBC: 417 txform = &enc_xform_blf; 418 break; 419 case CRYPTO_CAST_CBC: 420 txform = &enc_xform_cast5; 421 break; 422 case CRYPTO_SKIPJACK_CBC: 423 txform = &enc_xform_skipjack; 424 break; 425 case CRYPTO_AES_CBC: 426 txform = &enc_xform_rijndael128; 427 break; 428 case CRYPTO_AES_XTS: 429 txform = &enc_xform_aes_xts; 430 break; 431 case CRYPTO_NULL_CBC: 432 txform = &enc_xform_null; 433 break; 434 case CRYPTO_ARC4: 435 txform = &enc_xform_arc4; 436 break; 437 case CRYPTO_CAMELLIA_CBC: 438 txform = &enc_xform_camellia; 439 break; 440 default: 441 return (EINVAL); 442 } 443 444 switch (sop->mac) { 445 case 0: 446 break; 447 case CRYPTO_MD5_HMAC: 448 thash = &auth_hash_hmac_md5; 449 break; 450 case CRYPTO_SHA1_HMAC: 451 thash = &auth_hash_hmac_sha1; 452 break; 453 case CRYPTO_SHA2_256_HMAC: 454 thash = &auth_hash_hmac_sha2_256; 455 break; 456 case CRYPTO_SHA2_384_HMAC: 457 thash = &auth_hash_hmac_sha2_384; 458 break; 459 case CRYPTO_SHA2_512_HMAC: 460 thash = &auth_hash_hmac_sha2_512; 461 break; 462 case CRYPTO_RIPEMD160_HMAC: 463 thash = &auth_hash_hmac_ripemd_160; 464 break; 465#ifdef notdef 466 case CRYPTO_MD5: 467 thash = &auth_hash_md5; 468 break; 469 case CRYPTO_SHA1: 470 thash = &auth_hash_sha1; 471 break; 472#endif 473 case CRYPTO_NULL_HMAC: 474 thash = &auth_hash_null; 475 break; 476 default: 477 return (EINVAL); 478 } 479 480 bzero(&crie, sizeof(crie)); 481 bzero(&cria, sizeof(cria)); 482 483 if (txform) { 484 crie.cri_alg = txform->type; 485 crie.cri_klen = sop->keylen * 8; 486 if (sop->keylen > txform->maxkey || 487 sop->keylen < txform->minkey) { 488 error = EINVAL; 489 goto bail; 490 } 491 492 crie.cri_key = malloc(crie.cri_klen / 8, 493 M_XDATA, M_WAITOK); 494 if ((error = copyin(sop->key, crie.cri_key, 495 crie.cri_klen / 8))) 496 goto bail; 497 if (thash) 498 crie.cri_next = &cria; 499 } 500 501 if (thash) { 502 cria.cri_alg = thash->type; 503 cria.cri_klen = sop->mackeylen * 8; 504 if (sop->mackeylen != thash->keysize) { 505 error = EINVAL; 506 goto bail; 507 } 508 509 if (cria.cri_klen) { 510 cria.cri_key = malloc(cria.cri_klen / 8, 511 M_XDATA, M_WAITOK); 512 if ((error = copyin(sop->mackey, cria.cri_key, 513 cria.cri_klen / 8))) 514 goto bail; 515 } 516 } 517 518 /* NB: CIOCGSESSION2 has the crid */ 519 if (cmd == CIOCGSESSION2 520#ifdef COMPAT_FREEBSD32 521 || cmd == CIOCGSESSION232 522#endif 523 ) { 524 crid = SES2(sop)->crid; 525 error = checkforsoftware(crid); 526 if (error) 527 goto bail; 528 } else 529 crid = CRYPTOCAP_F_HARDWARE; 530 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 531 if (error) 532 goto bail; 533 534 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 535 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 536 thash); 537 538 if (cse == NULL) { 539 crypto_freesession(sid); 540 error = EINVAL; 541 goto bail; 542 } 543 sop->ses = cse->ses; 544 if (cmd == CIOCGSESSION2 545#ifdef COMPAT_FREEBSD32 546 || cmd == CIOCGSESSION232 547#endif 548 ) { 549 /* return hardware/driver id */ 550 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 551 } 552bail: 553 if (error) { 554 if (crie.cri_key) 555 free(crie.cri_key, M_XDATA); 556 if (cria.cri_key) 557 free(cria.cri_key, M_XDATA); 558 } 559#ifdef COMPAT_FREEBSD32 560 else { 561 if (cmd == CIOCGSESSION32) 562 session_op_to_32(sop, data); 563 else if (cmd == CIOCGSESSION232) 564 session2_op_to_32((struct session2_op *)sop, 565 data); 566 } 567#endif 568 break; 569 case CIOCFSESSION: 570 ses = *(u_int32_t *)data; 571 cse = csefind(fcr, ses); 572 if (cse == NULL) 573 return (EINVAL); 574 csedelete(fcr, cse); 575 error = csefree(cse); 576 break; 577 case CIOCCRYPT: 578#ifdef COMPAT_FREEBSD32 579 case CIOCCRYPT32: 580 if (cmd == CIOCCRYPT32) { 581 cop = &copc; 582 crypt_op_from_32(data, cop); 583 } else 584#endif 585 cop = (struct crypt_op *)data; 586 cse = csefind(fcr, cop->ses); 587 if (cse == NULL) 588 return (EINVAL); 589 error = cryptodev_op(cse, cop, active_cred, td); 590#ifdef COMPAT_FREEBSD32 591 if (error == 0 && cmd == CIOCCRYPT32) 592 crypt_op_to_32(cop, data); 593#endif 594 break; 595 case CIOCKEY: 596 case CIOCKEY2: 597#ifdef COMPAT_FREEBSD32 598 case CIOCKEY32: 599 case CIOCKEY232: 600#endif 601 if (!crypto_userasymcrypto) 602 return (EPERM); /* XXX compat? */ 603#ifdef COMPAT_FREEBSD32 604 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) { 605 kop = &kopc; 606 crypt_kop_from_32(data, kop); 607 } else 608#endif 609 kop = (struct crypt_kop *)data; 610 if (cmd == CIOCKEY 611#ifdef COMPAT_FREEBSD32 612 || cmd == CIOCKEY32 613#endif 614 ) { 615 /* NB: crypto core enforces s/w driver use */ 616 kop->crk_crid = 617 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 618 } 619 mtx_lock(&Giant); 620 error = cryptodev_key(kop); 621 mtx_unlock(&Giant); 622#ifdef COMPAT_FREEBSD32 623 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) 624 crypt_kop_to_32(kop, data); 625#endif 626 break; 627 case CIOCASYMFEAT: 628 if (!crypto_userasymcrypto) { 629 /* 630 * NB: if user asym crypto operations are 631 * not permitted return "no algorithms" 632 * so well-behaved applications will just 633 * fallback to doing them in software. 634 */ 635 *(int *)data = 0; 636 } else 637 error = crypto_getfeat((int *)data); 638 break; 639 case CIOCFINDDEV: 640 error = cryptodev_find((struct crypt_find_op *)data); 641 break; 642 default: 643 error = EINVAL; 644 break; 645 } 646 return (error); 647#undef SES2 648} 649 650static int cryptodev_cb(void *); 651 652 653static int 654cryptodev_op( 655 struct csession *cse, 656 struct crypt_op *cop, 657 struct ucred *active_cred, 658 struct thread *td) 659{ 660 struct cryptop *crp = NULL; 661 struct cryptodesc *crde = NULL, *crda = NULL; 662 int error; 663 664 if (cop->len > 256*1024-4) 665 return (E2BIG); 666 667 if (cse->txform) { 668 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 669 return (EINVAL); 670 } 671 672 cse->uio.uio_iov = &cse->iovec; 673 cse->uio.uio_iovcnt = 1; 674 cse->uio.uio_offset = 0; 675 cse->uio.uio_resid = cop->len; 676 cse->uio.uio_segflg = UIO_SYSSPACE; 677 cse->uio.uio_rw = UIO_WRITE; 678 cse->uio.uio_td = td; 679 cse->uio.uio_iov[0].iov_len = cop->len; 680 if (cse->thash) { 681 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 682 cse->uio.uio_resid += cse->thash->hashsize; 683 } 684 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len, 685 M_XDATA, M_WAITOK); 686 687 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 688 if (crp == NULL) { 689 error = ENOMEM; 690 goto bail; 691 } 692 693 if (cse->thash) { 694 crda = crp->crp_desc; 695 if (cse->txform) 696 crde = crda->crd_next; 697 } else { 698 if (cse->txform) 699 crde = crp->crp_desc; 700 else { 701 error = EINVAL; 702 goto bail; 703 } 704 } 705 706 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 707 goto bail; 708 709 if (crda) { 710 crda->crd_skip = 0; 711 crda->crd_len = cop->len; 712 crda->crd_inject = cop->len; 713 714 crda->crd_alg = cse->mac; 715 crda->crd_key = cse->mackey; 716 crda->crd_klen = cse->mackeylen * 8; 717 } 718 719 if (crde) { 720 if (cop->op == COP_ENCRYPT) 721 crde->crd_flags |= CRD_F_ENCRYPT; 722 else 723 crde->crd_flags &= ~CRD_F_ENCRYPT; 724 crde->crd_len = cop->len; 725 crde->crd_inject = 0; 726 727 crde->crd_alg = cse->cipher; 728 crde->crd_key = cse->key; 729 crde->crd_klen = cse->keylen * 8; 730 } 731 732 crp->crp_ilen = cop->len; 733 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 734 | (cop->flags & COP_F_BATCH); 735 crp->crp_buf = (caddr_t)&cse->uio; 736 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 737 crp->crp_sid = cse->sid; 738 crp->crp_opaque = (void *)cse; 739 740 if (cop->iv) { 741 if (crde == NULL) { 742 error = EINVAL; 743 goto bail; 744 } 745 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 746 error = EINVAL; 747 goto bail; 748 } 749 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 750 goto bail; 751 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 752 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 753 crde->crd_skip = 0; 754 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 755 crde->crd_skip = 0; 756 } else if (crde) { 757 crde->crd_flags |= CRD_F_IV_PRESENT; 758 crde->crd_skip = cse->txform->blocksize; 759 crde->crd_len -= cse->txform->blocksize; 760 } 761 762 if (cop->mac && crda == NULL) { 763 error = EINVAL; 764 goto bail; 765 } 766 767again: 768 /* 769 * Let the dispatch run unlocked, then, interlock against the 770 * callback before checking if the operation completed and going 771 * to sleep. This insures drivers don't inherit our lock which 772 * results in a lock order reversal between crypto_dispatch forced 773 * entry and the crypto_done callback into us. 774 */ 775 error = crypto_dispatch(crp); 776 mtx_lock(&cse->lock); 777 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 778 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 779 mtx_unlock(&cse->lock); 780 781 if (error != 0) 782 goto bail; 783 784 if (crp->crp_etype == EAGAIN) { 785 crp->crp_etype = 0; 786 crp->crp_flags &= ~CRYPTO_F_DONE; 787 goto again; 788 } 789 790 if (crp->crp_etype != 0) { 791 error = crp->crp_etype; 792 goto bail; 793 } 794 795 if (cse->error) { 796 error = cse->error; 797 goto bail; 798 } 799 800 if (cop->dst && 801 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 802 goto bail; 803 804 if (cop->mac && 805 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 806 cop->mac, cse->thash->hashsize))) 807 goto bail; 808 809bail: 810 if (crp) 811 crypto_freereq(crp); 812 if (cse->uio.uio_iov[0].iov_base) 813 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 814 815 return (error); 816} 817 818static int 819cryptodev_cb(void *op) 820{ 821 struct cryptop *crp = (struct cryptop *) op; 822 struct csession *cse = (struct csession *)crp->crp_opaque; 823 824 mtx_lock(&cse->lock); 825 cse->error = crp->crp_etype; 826 wakeup_one(crp); 827 mtx_unlock(&cse->lock); 828 return (0); 829} 830 831static int 832cryptodevkey_cb(void *op) 833{ 834 struct cryptkop *krp = (struct cryptkop *) op; 835 836 wakeup_one(krp); 837 return (0); 838} 839 840static int 841cryptodev_key(struct crypt_kop *kop) 842{ 843 struct cryptkop *krp = NULL; 844 int error = EINVAL; 845 int in, out, size, i; 846 847 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 848 return (EFBIG); 849 } 850 851 in = kop->crk_iparams; 852 out = kop->crk_oparams; 853 switch (kop->crk_op) { 854 case CRK_MOD_EXP: 855 if (in == 3 && out == 1) 856 break; 857 return (EINVAL); 858 case CRK_MOD_EXP_CRT: 859 if (in == 6 && out == 1) 860 break; 861 return (EINVAL); 862 case CRK_DSA_SIGN: 863 if (in == 5 && out == 2) 864 break; 865 return (EINVAL); 866 case CRK_DSA_VERIFY: 867 if (in == 7 && out == 0) 868 break; 869 return (EINVAL); 870 case CRK_DH_COMPUTE_KEY: 871 if (in == 3 && out == 1) 872 break; 873 return (EINVAL); 874 default: 875 return (EINVAL); 876 } 877 878 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 879 if (!krp) 880 return (ENOMEM); 881 krp->krp_op = kop->crk_op; 882 krp->krp_status = kop->crk_status; 883 krp->krp_iparams = kop->crk_iparams; 884 krp->krp_oparams = kop->crk_oparams; 885 krp->krp_crid = kop->crk_crid; 886 krp->krp_status = 0; 887 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 888 889 for (i = 0; i < CRK_MAXPARAM; i++) { 890 if (kop->crk_param[i].crp_nbits > 65536) 891 /* Limit is the same as in OpenBSD */ 892 goto fail; 893 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 894 } 895 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 896 size = (krp->krp_param[i].crp_nbits + 7) / 8; 897 if (size == 0) 898 continue; 899 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 900 if (i >= krp->krp_iparams) 901 continue; 902 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 903 if (error) 904 goto fail; 905 } 906 907 error = crypto_kdispatch(krp); 908 if (error) 909 goto fail; 910 error = tsleep(krp, PSOCK, "crydev", 0); 911 if (error) { 912 /* XXX can this happen? if so, how do we recover? */ 913 goto fail; 914 } 915 916 kop->crk_crid = krp->krp_crid; /* device that did the work */ 917 if (krp->krp_status != 0) { 918 error = krp->krp_status; 919 goto fail; 920 } 921 922 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 923 size = (krp->krp_param[i].crp_nbits + 7) / 8; 924 if (size == 0) 925 continue; 926 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 927 if (error) 928 goto fail; 929 } 930 931fail: 932 if (krp) { 933 kop->crk_status = krp->krp_status; 934 for (i = 0; i < CRK_MAXPARAM; i++) { 935 if (krp->krp_param[i].crp_p) 936 free(krp->krp_param[i].crp_p, M_XDATA); 937 } 938 free(krp, M_XDATA); 939 } 940 return (error); 941} 942 943static int 944cryptodev_find(struct crypt_find_op *find) 945{ 946 device_t dev; 947 948 if (find->crid != -1) { 949 dev = crypto_find_device_byhid(find->crid); 950 if (dev == NULL) 951 return (ENOENT); 952 strlcpy(find->name, device_get_nameunit(dev), 953 sizeof(find->name)); 954 } else { 955 find->crid = crypto_find_driver(find->name); 956 if (find->crid == -1) 957 return (ENOENT); 958 } 959 return (0); 960} 961 962/* ARGSUSED */ 963static int 964cryptof_poll( 965 struct file *fp, 966 int events, 967 struct ucred *active_cred, 968 struct thread *td) 969{ 970 971 return (0); 972} 973 974/* ARGSUSED */ 975static int 976cryptof_kqfilter(struct file *fp, struct knote *kn) 977{ 978 979 return (0); 980} 981 982/* ARGSUSED */ 983static int 984cryptof_stat( 985 struct file *fp, 986 struct stat *sb, 987 struct ucred *active_cred, 988 struct thread *td) 989{ 990 991 return (EOPNOTSUPP); 992} 993 994/* ARGSUSED */ 995static int 996cryptof_close(struct file *fp, struct thread *td) 997{ 998 struct fcrypt *fcr = fp->f_data; 999 struct csession *cse; 1000 1001 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 1002 TAILQ_REMOVE(&fcr->csessions, cse, next); 1003 (void)csefree(cse); 1004 } 1005 free(fcr, M_XDATA); 1006 fp->f_data = NULL; 1007 return 0; 1008} 1009 1010static struct csession * 1011csefind(struct fcrypt *fcr, u_int ses) 1012{ 1013 struct csession *cse; 1014 1015 TAILQ_FOREACH(cse, &fcr->csessions, next) 1016 if (cse->ses == ses) 1017 return (cse); 1018 return (NULL); 1019} 1020 1021static int 1022csedelete(struct fcrypt *fcr, struct csession *cse_del) 1023{ 1024 struct csession *cse; 1025 1026 TAILQ_FOREACH(cse, &fcr->csessions, next) { 1027 if (cse == cse_del) { 1028 TAILQ_REMOVE(&fcr->csessions, cse, next); 1029 return (1); 1030 } 1031 } 1032 return (0); 1033} 1034 1035static struct csession * 1036cseadd(struct fcrypt *fcr, struct csession *cse) 1037{ 1038 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 1039 cse->ses = fcr->sesn++; 1040 return (cse); 1041} 1042 1043struct csession * 1044csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 1045 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 1046 struct enc_xform *txform, struct auth_hash *thash) 1047{ 1048 struct csession *cse; 1049 1050 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO); 1051 if (cse == NULL) 1052 return NULL; 1053 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 1054 cse->key = key; 1055 cse->keylen = keylen/8; 1056 cse->mackey = mackey; 1057 cse->mackeylen = mackeylen/8; 1058 cse->sid = sid; 1059 cse->cipher = cipher; 1060 cse->mac = mac; 1061 cse->txform = txform; 1062 cse->thash = thash; 1063 cseadd(fcr, cse); 1064 return (cse); 1065} 1066 1067static int 1068csefree(struct csession *cse) 1069{ 1070 int error; 1071 1072 error = crypto_freesession(cse->sid); 1073 mtx_destroy(&cse->lock); 1074 if (cse->key) 1075 free(cse->key, M_XDATA); 1076 if (cse->mackey) 1077 free(cse->mackey, M_XDATA); 1078 free(cse, M_XDATA); 1079 return (error); 1080} 1081 1082static int 1083cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 1084{ 1085 return (0); 1086} 1087 1088static int 1089cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 1090{ 1091 return (EIO); 1092} 1093 1094static int 1095cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 1096{ 1097 return (EIO); 1098} 1099 1100static int 1101cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 1102{ 1103 struct file *f; 1104 struct fcrypt *fcr; 1105 int fd, error; 1106 1107 switch (cmd) { 1108 case CRIOGET: 1109 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK); 1110 TAILQ_INIT(&fcr->csessions); 1111 fcr->sesn = 0; 1112 1113 error = falloc(td, &f, &fd, 0); 1114 1115 if (error) { 1116 free(fcr, M_XDATA); 1117 return (error); 1118 } 1119 /* falloc automatically provides an extra reference to 'f'. */ 1120 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops); 1121 *(u_int32_t *)data = fd; 1122 fdrop(f, td); 1123 break; 1124 case CRIOFINDDEV: 1125 error = cryptodev_find((struct crypt_find_op *)data); 1126 break; 1127 case CRIOASYMFEAT: 1128 error = crypto_getfeat((int *)data); 1129 break; 1130 default: 1131 error = EINVAL; 1132 break; 1133 } 1134 return (error); 1135} 1136 1137static struct cdevsw crypto_cdevsw = { 1138 .d_version = D_VERSION, 1139 .d_flags = D_NEEDGIANT, 1140 .d_open = cryptoopen, 1141 .d_read = cryptoread, 1142 .d_write = cryptowrite, 1143 .d_ioctl = cryptoioctl, 1144 .d_name = "crypto", 1145}; 1146static struct cdev *crypto_dev; 1147 1148/* 1149 * Initialization code, both for static and dynamic loading. 1150 */ 1151static int 1152cryptodev_modevent(module_t mod, int type, void *unused) 1153{ 1154 switch (type) { 1155 case MOD_LOAD: 1156 if (bootverbose) 1157 printf("crypto: <crypto device>\n"); 1158 crypto_dev = make_dev(&crypto_cdevsw, 0, 1159 UID_ROOT, GID_WHEEL, 0666, 1160 "crypto"); 1161 return 0; 1162 case MOD_UNLOAD: 1163 /*XXX disallow if active sessions */ 1164 destroy_dev(crypto_dev); 1165 return 0; 1166 } 1167 return EINVAL; 1168} 1169 1170static moduledata_t cryptodev_mod = { 1171 "cryptodev", 1172 cryptodev_modevent, 1173 0 1174}; 1175MODULE_VERSION(cryptodev, 1); 1176DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 1177MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 1178MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 1179