cryptodev.c revision 213068
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 213068 2010-09-23 11:52:32Z pjd $"); 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}; 306 307static struct csession *csefind(struct fcrypt *, u_int); 308static int csedelete(struct fcrypt *, struct csession *); 309static struct csession *cseadd(struct fcrypt *, struct csession *); 310static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, 311 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 312 struct auth_hash *); 313static int csefree(struct csession *); 314 315static int cryptodev_op(struct csession *, struct crypt_op *, 316 struct ucred *, struct thread *td); 317static int cryptodev_key(struct crypt_kop *); 318static int cryptodev_find(struct crypt_find_op *); 319 320static int 321cryptof_rw( 322 struct file *fp, 323 struct uio *uio, 324 struct ucred *active_cred, 325 int flags, 326 struct thread *td) 327{ 328 329 return (EIO); 330} 331 332static int 333cryptof_truncate( 334 struct file *fp, 335 off_t length, 336 struct ucred *active_cred, 337 struct thread *td) 338{ 339 340 return (EINVAL); 341} 342 343/* 344 * Check a crypto identifier to see if it requested 345 * a software device/driver. This can be done either 346 * by device name/class or through search constraints. 347 */ 348static int 349checkforsoftware(int crid) 350{ 351 if (crid & CRYPTOCAP_F_SOFTWARE) 352 return EINVAL; /* XXX */ 353 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 354 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 355 return EINVAL; /* XXX */ 356 return 0; 357} 358 359/* ARGSUSED */ 360static int 361cryptof_ioctl( 362 struct file *fp, 363 u_long cmd, 364 void *data, 365 struct ucred *active_cred, 366 struct thread *td) 367{ 368#define SES2(p) ((struct session2_op *)p) 369 struct cryptoini cria, crie; 370 struct fcrypt *fcr = fp->f_data; 371 struct csession *cse; 372 struct session_op *sop; 373 struct crypt_op *cop; 374 struct enc_xform *txform = NULL; 375 struct auth_hash *thash = NULL; 376 struct crypt_kop *kop; 377 u_int64_t sid; 378 u_int32_t ses; 379 int error = 0, crid; 380#ifdef COMPAT_FREEBSD32 381 struct session2_op sopc; 382 struct crypt_op copc; 383 struct crypt_kop kopc; 384#endif 385 386 switch (cmd) { 387 case CIOCGSESSION: 388 case CIOCGSESSION2: 389#ifdef COMPAT_FREEBSD32 390 case CIOCGSESSION32: 391 case CIOCGSESSION232: 392 if (cmd == CIOCGSESSION32) { 393 session_op_from_32(data, (struct session_op *)&sopc); 394 sop = (struct session_op *)&sopc; 395 } else if (cmd == CIOCGSESSION232) { 396 session2_op_from_32(data, &sopc); 397 sop = (struct session_op *)&sopc; 398 } else 399#endif 400 sop = (struct session_op *)data; 401 switch (sop->cipher) { 402 case 0: 403 break; 404 case CRYPTO_DES_CBC: 405 txform = &enc_xform_des; 406 break; 407 case CRYPTO_3DES_CBC: 408 txform = &enc_xform_3des; 409 break; 410 case CRYPTO_BLF_CBC: 411 txform = &enc_xform_blf; 412 break; 413 case CRYPTO_CAST_CBC: 414 txform = &enc_xform_cast5; 415 break; 416 case CRYPTO_SKIPJACK_CBC: 417 txform = &enc_xform_skipjack; 418 break; 419 case CRYPTO_AES_CBC: 420 txform = &enc_xform_rijndael128; 421 break; 422 case CRYPTO_AES_XTS: 423 txform = &enc_xform_aes_xts; 424 break; 425 case CRYPTO_NULL_CBC: 426 txform = &enc_xform_null; 427 break; 428 case CRYPTO_ARC4: 429 txform = &enc_xform_arc4; 430 break; 431 case CRYPTO_CAMELLIA_CBC: 432 txform = &enc_xform_camellia; 433 break; 434 default: 435 return (EINVAL); 436 } 437 438 switch (sop->mac) { 439 case 0: 440 break; 441 case CRYPTO_MD5_HMAC: 442 thash = &auth_hash_hmac_md5; 443 break; 444 case CRYPTO_SHA1_HMAC: 445 thash = &auth_hash_hmac_sha1; 446 break; 447 case CRYPTO_SHA2_256_HMAC: 448 thash = &auth_hash_hmac_sha2_256; 449 break; 450 case CRYPTO_SHA2_384_HMAC: 451 thash = &auth_hash_hmac_sha2_384; 452 break; 453 case CRYPTO_SHA2_512_HMAC: 454 thash = &auth_hash_hmac_sha2_512; 455 break; 456 case CRYPTO_RIPEMD160_HMAC: 457 thash = &auth_hash_hmac_ripemd_160; 458 break; 459#ifdef notdef 460 case CRYPTO_MD5: 461 thash = &auth_hash_md5; 462 break; 463 case CRYPTO_SHA1: 464 thash = &auth_hash_sha1; 465 break; 466#endif 467 case CRYPTO_NULL_HMAC: 468 thash = &auth_hash_null; 469 break; 470 default: 471 return (EINVAL); 472 } 473 474 bzero(&crie, sizeof(crie)); 475 bzero(&cria, sizeof(cria)); 476 477 if (txform) { 478 crie.cri_alg = txform->type; 479 crie.cri_klen = sop->keylen * 8; 480 if (sop->keylen > txform->maxkey || 481 sop->keylen < txform->minkey) { 482 error = EINVAL; 483 goto bail; 484 } 485 486 crie.cri_key = malloc(crie.cri_klen / 8, 487 M_XDATA, M_WAITOK); 488 if ((error = copyin(sop->key, crie.cri_key, 489 crie.cri_klen / 8))) 490 goto bail; 491 if (thash) 492 crie.cri_next = &cria; 493 } 494 495 if (thash) { 496 cria.cri_alg = thash->type; 497 cria.cri_klen = sop->mackeylen * 8; 498 if (sop->mackeylen != thash->keysize) { 499 error = EINVAL; 500 goto bail; 501 } 502 503 if (cria.cri_klen) { 504 cria.cri_key = malloc(cria.cri_klen / 8, 505 M_XDATA, M_WAITOK); 506 if ((error = copyin(sop->mackey, cria.cri_key, 507 cria.cri_klen / 8))) 508 goto bail; 509 } 510 } 511 512 /* NB: CIOCGSESSION2 has the crid */ 513 if (cmd == CIOCGSESSION2 514#ifdef COMPAT_FREEBSD32 515 || cmd == CIOCGSESSION232 516#endif 517 ) { 518 crid = SES2(sop)->crid; 519 error = checkforsoftware(crid); 520 if (error) 521 goto bail; 522 } else 523 crid = CRYPTOCAP_F_HARDWARE; 524 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 525 if (error) 526 goto bail; 527 528 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 529 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 530 thash); 531 532 if (cse == NULL) { 533 crypto_freesession(sid); 534 error = EINVAL; 535 goto bail; 536 } 537 sop->ses = cse->ses; 538 if (cmd == CIOCGSESSION2 539#ifdef COMPAT_FREEBSD32 540 || cmd == CIOCGSESSION232 541#endif 542 ) { 543 /* return hardware/driver id */ 544 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 545 } 546bail: 547 if (error) { 548 if (crie.cri_key) 549 free(crie.cri_key, M_XDATA); 550 if (cria.cri_key) 551 free(cria.cri_key, M_XDATA); 552 } 553#ifdef COMPAT_FREEBSD32 554 else { 555 if (cmd == CIOCGSESSION32) 556 session_op_to_32(sop, data); 557 else if (cmd == CIOCGSESSION232) 558 session2_op_to_32((struct session2_op *)sop, 559 data); 560 } 561#endif 562 break; 563 case CIOCFSESSION: 564 ses = *(u_int32_t *)data; 565 cse = csefind(fcr, ses); 566 if (cse == NULL) 567 return (EINVAL); 568 csedelete(fcr, cse); 569 error = csefree(cse); 570 break; 571 case CIOCCRYPT: 572#ifdef COMPAT_FREEBSD32 573 case CIOCCRYPT32: 574 if (cmd == CIOCCRYPT32) { 575 cop = &copc; 576 crypt_op_from_32(data, cop); 577 } else 578#endif 579 cop = (struct crypt_op *)data; 580 cse = csefind(fcr, cop->ses); 581 if (cse == NULL) 582 return (EINVAL); 583 error = cryptodev_op(cse, cop, active_cred, td); 584#ifdef COMPAT_FREEBSD32 585 if (error == 0 && cmd == CIOCCRYPT32) 586 crypt_op_to_32(cop, data); 587#endif 588 break; 589 case CIOCKEY: 590 case CIOCKEY2: 591#ifdef COMPAT_FREEBSD32 592 case CIOCKEY32: 593 case CIOCKEY232: 594#endif 595 if (!crypto_userasymcrypto) 596 return (EPERM); /* XXX compat? */ 597#ifdef COMPAT_FREEBSD32 598 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) { 599 kop = &kopc; 600 crypt_kop_from_32(data, kop); 601 } else 602#endif 603 kop = (struct crypt_kop *)data; 604 if (cmd == CIOCKEY 605#ifdef COMPAT_FREEBSD32 606 || cmd == CIOCKEY32 607#endif 608 ) { 609 /* NB: crypto core enforces s/w driver use */ 610 kop->crk_crid = 611 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 612 } 613 mtx_lock(&Giant); 614 error = cryptodev_key(kop); 615 mtx_unlock(&Giant); 616#ifdef COMPAT_FREEBSD32 617 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) 618 crypt_kop_to_32(kop, data); 619#endif 620 break; 621 case CIOCASYMFEAT: 622 if (!crypto_userasymcrypto) { 623 /* 624 * NB: if user asym crypto operations are 625 * not permitted return "no algorithms" 626 * so well-behaved applications will just 627 * fallback to doing them in software. 628 */ 629 *(int *)data = 0; 630 } else 631 error = crypto_getfeat((int *)data); 632 break; 633 case CIOCFINDDEV: 634 error = cryptodev_find((struct crypt_find_op *)data); 635 break; 636 default: 637 error = EINVAL; 638 break; 639 } 640 return (error); 641#undef SES2 642} 643 644static int cryptodev_cb(void *); 645 646 647static int 648cryptodev_op( 649 struct csession *cse, 650 struct crypt_op *cop, 651 struct ucred *active_cred, 652 struct thread *td) 653{ 654 struct cryptop *crp = NULL; 655 struct cryptodesc *crde = NULL, *crda = NULL; 656 int error; 657 658 if (cop->len > 256*1024-4) 659 return (E2BIG); 660 661 if (cse->txform) { 662 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 663 return (EINVAL); 664 } 665 666 cse->uio.uio_iov = &cse->iovec; 667 cse->uio.uio_iovcnt = 1; 668 cse->uio.uio_offset = 0; 669 cse->uio.uio_resid = cop->len; 670 cse->uio.uio_segflg = UIO_SYSSPACE; 671 cse->uio.uio_rw = UIO_WRITE; 672 cse->uio.uio_td = td; 673 cse->uio.uio_iov[0].iov_len = cop->len; 674 if (cse->thash) { 675 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 676 cse->uio.uio_resid += cse->thash->hashsize; 677 } 678 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len, 679 M_XDATA, M_WAITOK); 680 681 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 682 if (crp == NULL) { 683 error = ENOMEM; 684 goto bail; 685 } 686 687 if (cse->thash) { 688 crda = crp->crp_desc; 689 if (cse->txform) 690 crde = crda->crd_next; 691 } else { 692 if (cse->txform) 693 crde = crp->crp_desc; 694 else { 695 error = EINVAL; 696 goto bail; 697 } 698 } 699 700 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 701 goto bail; 702 703 if (crda) { 704 crda->crd_skip = 0; 705 crda->crd_len = cop->len; 706 crda->crd_inject = cop->len; 707 708 crda->crd_alg = cse->mac; 709 crda->crd_key = cse->mackey; 710 crda->crd_klen = cse->mackeylen * 8; 711 } 712 713 if (crde) { 714 if (cop->op == COP_ENCRYPT) 715 crde->crd_flags |= CRD_F_ENCRYPT; 716 else 717 crde->crd_flags &= ~CRD_F_ENCRYPT; 718 crde->crd_len = cop->len; 719 crde->crd_inject = 0; 720 721 crde->crd_alg = cse->cipher; 722 crde->crd_key = cse->key; 723 crde->crd_klen = cse->keylen * 8; 724 } 725 726 crp->crp_ilen = cop->len; 727 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 728 | (cop->flags & COP_F_BATCH); 729 crp->crp_buf = (caddr_t)&cse->uio; 730 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 731 crp->crp_sid = cse->sid; 732 crp->crp_opaque = (void *)cse; 733 734 if (cop->iv) { 735 if (crde == NULL) { 736 error = EINVAL; 737 goto bail; 738 } 739 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 740 error = EINVAL; 741 goto bail; 742 } 743 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 744 goto bail; 745 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 746 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 747 crde->crd_skip = 0; 748 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 749 crde->crd_skip = 0; 750 } else if (crde) { 751 crde->crd_flags |= CRD_F_IV_PRESENT; 752 crde->crd_skip = cse->txform->blocksize; 753 crde->crd_len -= cse->txform->blocksize; 754 } 755 756 if (cop->mac && crda == NULL) { 757 error = EINVAL; 758 goto bail; 759 } 760 761again: 762 /* 763 * Let the dispatch run unlocked, then, interlock against the 764 * callback before checking if the operation completed and going 765 * to sleep. This insures drivers don't inherit our lock which 766 * results in a lock order reversal between crypto_dispatch forced 767 * entry and the crypto_done callback into us. 768 */ 769 error = crypto_dispatch(crp); 770 mtx_lock(&cse->lock); 771 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 772 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 773 mtx_unlock(&cse->lock); 774 775 if (error != 0) 776 goto bail; 777 778 if (crp->crp_etype == EAGAIN) { 779 crp->crp_etype = 0; 780 crp->crp_flags &= ~CRYPTO_F_DONE; 781 goto again; 782 } 783 784 if (crp->crp_etype != 0) { 785 error = crp->crp_etype; 786 goto bail; 787 } 788 789 if (cse->error) { 790 error = cse->error; 791 goto bail; 792 } 793 794 if (cop->dst && 795 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 796 goto bail; 797 798 if (cop->mac && 799 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 800 cop->mac, cse->thash->hashsize))) 801 goto bail; 802 803bail: 804 if (crp) 805 crypto_freereq(crp); 806 if (cse->uio.uio_iov[0].iov_base) 807 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 808 809 return (error); 810} 811 812static int 813cryptodev_cb(void *op) 814{ 815 struct cryptop *crp = (struct cryptop *) op; 816 struct csession *cse = (struct csession *)crp->crp_opaque; 817 818 mtx_lock(&cse->lock); 819 cse->error = crp->crp_etype; 820 wakeup_one(crp); 821 mtx_unlock(&cse->lock); 822 return (0); 823} 824 825static int 826cryptodevkey_cb(void *op) 827{ 828 struct cryptkop *krp = (struct cryptkop *) op; 829 830 wakeup_one(krp); 831 return (0); 832} 833 834static int 835cryptodev_key(struct crypt_kop *kop) 836{ 837 struct cryptkop *krp = NULL; 838 int error = EINVAL; 839 int in, out, size, i; 840 841 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 842 return (EFBIG); 843 } 844 845 in = kop->crk_iparams; 846 out = kop->crk_oparams; 847 switch (kop->crk_op) { 848 case CRK_MOD_EXP: 849 if (in == 3 && out == 1) 850 break; 851 return (EINVAL); 852 case CRK_MOD_EXP_CRT: 853 if (in == 6 && out == 1) 854 break; 855 return (EINVAL); 856 case CRK_DSA_SIGN: 857 if (in == 5 && out == 2) 858 break; 859 return (EINVAL); 860 case CRK_DSA_VERIFY: 861 if (in == 7 && out == 0) 862 break; 863 return (EINVAL); 864 case CRK_DH_COMPUTE_KEY: 865 if (in == 3 && out == 1) 866 break; 867 return (EINVAL); 868 default: 869 return (EINVAL); 870 } 871 872 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 873 if (!krp) 874 return (ENOMEM); 875 krp->krp_op = kop->crk_op; 876 krp->krp_status = kop->crk_status; 877 krp->krp_iparams = kop->crk_iparams; 878 krp->krp_oparams = kop->crk_oparams; 879 krp->krp_crid = kop->crk_crid; 880 krp->krp_status = 0; 881 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 882 883 for (i = 0; i < CRK_MAXPARAM; i++) { 884 if (kop->crk_param[i].crp_nbits > 65536) 885 /* Limit is the same as in OpenBSD */ 886 goto fail; 887 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 888 } 889 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 890 size = (krp->krp_param[i].crp_nbits + 7) / 8; 891 if (size == 0) 892 continue; 893 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 894 if (i >= krp->krp_iparams) 895 continue; 896 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 897 if (error) 898 goto fail; 899 } 900 901 error = crypto_kdispatch(krp); 902 if (error) 903 goto fail; 904 error = tsleep(krp, PSOCK, "crydev", 0); 905 if (error) { 906 /* XXX can this happen? if so, how do we recover? */ 907 goto fail; 908 } 909 910 kop->crk_crid = krp->krp_crid; /* device that did the work */ 911 if (krp->krp_status != 0) { 912 error = krp->krp_status; 913 goto fail; 914 } 915 916 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 917 size = (krp->krp_param[i].crp_nbits + 7) / 8; 918 if (size == 0) 919 continue; 920 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 921 if (error) 922 goto fail; 923 } 924 925fail: 926 if (krp) { 927 kop->crk_status = krp->krp_status; 928 for (i = 0; i < CRK_MAXPARAM; i++) { 929 if (krp->krp_param[i].crp_p) 930 free(krp->krp_param[i].crp_p, M_XDATA); 931 } 932 free(krp, M_XDATA); 933 } 934 return (error); 935} 936 937static int 938cryptodev_find(struct crypt_find_op *find) 939{ 940 device_t dev; 941 942 if (find->crid != -1) { 943 dev = crypto_find_device_byhid(find->crid); 944 if (dev == NULL) 945 return (ENOENT); 946 strlcpy(find->name, device_get_nameunit(dev), 947 sizeof(find->name)); 948 } else { 949 find->crid = crypto_find_driver(find->name); 950 if (find->crid == -1) 951 return (ENOENT); 952 } 953 return (0); 954} 955 956/* ARGSUSED */ 957static int 958cryptof_poll( 959 struct file *fp, 960 int events, 961 struct ucred *active_cred, 962 struct thread *td) 963{ 964 965 return (0); 966} 967 968/* ARGSUSED */ 969static int 970cryptof_kqfilter(struct file *fp, struct knote *kn) 971{ 972 973 return (0); 974} 975 976/* ARGSUSED */ 977static int 978cryptof_stat( 979 struct file *fp, 980 struct stat *sb, 981 struct ucred *active_cred, 982 struct thread *td) 983{ 984 985 return (EOPNOTSUPP); 986} 987 988/* ARGSUSED */ 989static int 990cryptof_close(struct file *fp, struct thread *td) 991{ 992 struct fcrypt *fcr = fp->f_data; 993 struct csession *cse; 994 995 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 996 TAILQ_REMOVE(&fcr->csessions, cse, next); 997 (void)csefree(cse); 998 } 999 free(fcr, M_XDATA); 1000 fp->f_data = NULL; 1001 return 0; 1002} 1003 1004static struct csession * 1005csefind(struct fcrypt *fcr, u_int ses) 1006{ 1007 struct csession *cse; 1008 1009 TAILQ_FOREACH(cse, &fcr->csessions, next) 1010 if (cse->ses == ses) 1011 return (cse); 1012 return (NULL); 1013} 1014 1015static int 1016csedelete(struct fcrypt *fcr, struct csession *cse_del) 1017{ 1018 struct csession *cse; 1019 1020 TAILQ_FOREACH(cse, &fcr->csessions, next) { 1021 if (cse == cse_del) { 1022 TAILQ_REMOVE(&fcr->csessions, cse, next); 1023 return (1); 1024 } 1025 } 1026 return (0); 1027} 1028 1029static struct csession * 1030cseadd(struct fcrypt *fcr, struct csession *cse) 1031{ 1032 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 1033 cse->ses = fcr->sesn++; 1034 return (cse); 1035} 1036 1037struct csession * 1038csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 1039 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 1040 struct enc_xform *txform, struct auth_hash *thash) 1041{ 1042 struct csession *cse; 1043 1044#ifdef INVARIANTS 1045 /* NB: required when mtx_init is built with INVARIANTS */ 1046 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO); 1047#else 1048 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT); 1049#endif 1050 if (cse == NULL) 1051 return NULL; 1052 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 1053 cse->key = key; 1054 cse->keylen = keylen/8; 1055 cse->mackey = mackey; 1056 cse->mackeylen = mackeylen/8; 1057 cse->sid = sid; 1058 cse->cipher = cipher; 1059 cse->mac = mac; 1060 cse->txform = txform; 1061 cse->thash = thash; 1062 cseadd(fcr, cse); 1063 return (cse); 1064} 1065 1066static int 1067csefree(struct csession *cse) 1068{ 1069 int error; 1070 1071 error = crypto_freesession(cse->sid); 1072 mtx_destroy(&cse->lock); 1073 if (cse->key) 1074 free(cse->key, M_XDATA); 1075 if (cse->mackey) 1076 free(cse->mackey, M_XDATA); 1077 free(cse, M_XDATA); 1078 return (error); 1079} 1080 1081static int 1082cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 1083{ 1084 return (0); 1085} 1086 1087static int 1088cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 1089{ 1090 return (EIO); 1091} 1092 1093static int 1094cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 1095{ 1096 return (EIO); 1097} 1098 1099static int 1100cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 1101{ 1102 struct file *f; 1103 struct fcrypt *fcr; 1104 int fd, error; 1105 1106 switch (cmd) { 1107 case CRIOGET: 1108 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK); 1109 TAILQ_INIT(&fcr->csessions); 1110 fcr->sesn = 0; 1111 1112 error = falloc(td, &f, &fd); 1113 1114 if (error) { 1115 free(fcr, M_XDATA); 1116 return (error); 1117 } 1118 /* falloc automatically provides an extra reference to 'f'. */ 1119 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops); 1120 *(u_int32_t *)data = fd; 1121 fdrop(f, td); 1122 break; 1123 case CRIOFINDDEV: 1124 error = cryptodev_find((struct crypt_find_op *)data); 1125 break; 1126 case CRIOASYMFEAT: 1127 error = crypto_getfeat((int *)data); 1128 break; 1129 default: 1130 error = EINVAL; 1131 break; 1132 } 1133 return (error); 1134} 1135 1136static struct cdevsw crypto_cdevsw = { 1137 .d_version = D_VERSION, 1138 .d_flags = D_NEEDGIANT, 1139 .d_open = cryptoopen, 1140 .d_read = cryptoread, 1141 .d_write = cryptowrite, 1142 .d_ioctl = cryptoioctl, 1143 .d_name = "crypto", 1144}; 1145static struct cdev *crypto_dev; 1146 1147/* 1148 * Initialization code, both for static and dynamic loading. 1149 */ 1150static int 1151cryptodev_modevent(module_t mod, int type, void *unused) 1152{ 1153 switch (type) { 1154 case MOD_LOAD: 1155 if (bootverbose) 1156 printf("crypto: <crypto device>\n"); 1157 crypto_dev = make_dev(&crypto_cdevsw, 0, 1158 UID_ROOT, GID_WHEEL, 0666, 1159 "crypto"); 1160 return 0; 1161 case MOD_UNLOAD: 1162 /*XXX disallow if active sessions */ 1163 destroy_dev(crypto_dev); 1164 return 0; 1165 } 1166 return EINVAL; 1167} 1168 1169static moduledata_t cryptodev_mod = { 1170 "cryptodev", 1171 cryptodev_modevent, 1172 0 1173}; 1174MODULE_VERSION(cryptodev, 1); 1175DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 1176MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 1177MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 1178