cryptodev.c revision 254356
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 254356 2013-08-15 07:54:31Z glebius $"); 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 if (crid & CRYPTOCAP_F_SOFTWARE) 355 return EINVAL; /* XXX */ 356 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 357 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 358 return EINVAL; /* XXX */ 359 return 0; 360} 361 362/* ARGSUSED */ 363static int 364cryptof_ioctl( 365 struct file *fp, 366 u_long cmd, 367 void *data, 368 struct ucred *active_cred, 369 struct thread *td) 370{ 371#define SES2(p) ((struct session2_op *)p) 372 struct cryptoini cria, crie; 373 struct fcrypt *fcr = fp->f_data; 374 struct csession *cse; 375 struct session_op *sop; 376 struct crypt_op *cop; 377 struct enc_xform *txform = NULL; 378 struct auth_hash *thash = NULL; 379 struct crypt_kop *kop; 380 u_int64_t sid; 381 u_int32_t ses; 382 int error = 0, crid; 383#ifdef COMPAT_FREEBSD32 384 struct session2_op sopc; 385 struct crypt_op copc; 386 struct crypt_kop kopc; 387#endif 388 389 switch (cmd) { 390 case CIOCGSESSION: 391 case CIOCGSESSION2: 392#ifdef COMPAT_FREEBSD32 393 case CIOCGSESSION32: 394 case CIOCGSESSION232: 395 if (cmd == CIOCGSESSION32) { 396 session_op_from_32(data, (struct session_op *)&sopc); 397 sop = (struct session_op *)&sopc; 398 } else if (cmd == CIOCGSESSION232) { 399 session2_op_from_32(data, &sopc); 400 sop = (struct session_op *)&sopc; 401 } else 402#endif 403 sop = (struct session_op *)data; 404 switch (sop->cipher) { 405 case 0: 406 break; 407 case CRYPTO_DES_CBC: 408 txform = &enc_xform_des; 409 break; 410 case CRYPTO_3DES_CBC: 411 txform = &enc_xform_3des; 412 break; 413 case CRYPTO_BLF_CBC: 414 txform = &enc_xform_blf; 415 break; 416 case CRYPTO_CAST_CBC: 417 txform = &enc_xform_cast5; 418 break; 419 case CRYPTO_SKIPJACK_CBC: 420 txform = &enc_xform_skipjack; 421 break; 422 case CRYPTO_AES_CBC: 423 txform = &enc_xform_rijndael128; 424 break; 425 case CRYPTO_AES_XTS: 426 txform = &enc_xform_aes_xts; 427 break; 428 case CRYPTO_NULL_CBC: 429 txform = &enc_xform_null; 430 break; 431 case CRYPTO_ARC4: 432 txform = &enc_xform_arc4; 433 break; 434 case CRYPTO_CAMELLIA_CBC: 435 txform = &enc_xform_camellia; 436 break; 437 default: 438 return (EINVAL); 439 } 440 441 switch (sop->mac) { 442 case 0: 443 break; 444 case CRYPTO_MD5_HMAC: 445 thash = &auth_hash_hmac_md5; 446 break; 447 case CRYPTO_SHA1_HMAC: 448 thash = &auth_hash_hmac_sha1; 449 break; 450 case CRYPTO_SHA2_256_HMAC: 451 thash = &auth_hash_hmac_sha2_256; 452 break; 453 case CRYPTO_SHA2_384_HMAC: 454 thash = &auth_hash_hmac_sha2_384; 455 break; 456 case CRYPTO_SHA2_512_HMAC: 457 thash = &auth_hash_hmac_sha2_512; 458 break; 459 case CRYPTO_RIPEMD160_HMAC: 460 thash = &auth_hash_hmac_ripemd_160; 461 break; 462#ifdef notdef 463 case CRYPTO_MD5: 464 thash = &auth_hash_md5; 465 break; 466 case CRYPTO_SHA1: 467 thash = &auth_hash_sha1; 468 break; 469#endif 470 case CRYPTO_NULL_HMAC: 471 thash = &auth_hash_null; 472 break; 473 default: 474 return (EINVAL); 475 } 476 477 bzero(&crie, sizeof(crie)); 478 bzero(&cria, sizeof(cria)); 479 480 if (txform) { 481 crie.cri_alg = txform->type; 482 crie.cri_klen = sop->keylen * 8; 483 if (sop->keylen > txform->maxkey || 484 sop->keylen < txform->minkey) { 485 error = EINVAL; 486 goto bail; 487 } 488 489 crie.cri_key = malloc(crie.cri_klen / 8, 490 M_XDATA, M_WAITOK); 491 if ((error = copyin(sop->key, crie.cri_key, 492 crie.cri_klen / 8))) 493 goto bail; 494 if (thash) 495 crie.cri_next = &cria; 496 } 497 498 if (thash) { 499 cria.cri_alg = thash->type; 500 cria.cri_klen = sop->mackeylen * 8; 501 if (sop->mackeylen != thash->keysize) { 502 error = EINVAL; 503 goto bail; 504 } 505 506 if (cria.cri_klen) { 507 cria.cri_key = malloc(cria.cri_klen / 8, 508 M_XDATA, M_WAITOK); 509 if ((error = copyin(sop->mackey, cria.cri_key, 510 cria.cri_klen / 8))) 511 goto bail; 512 } 513 } 514 515 /* NB: CIOCGSESSION2 has the crid */ 516 if (cmd == CIOCGSESSION2 517#ifdef COMPAT_FREEBSD32 518 || cmd == CIOCGSESSION232 519#endif 520 ) { 521 crid = SES2(sop)->crid; 522 error = checkforsoftware(crid); 523 if (error) 524 goto bail; 525 } else 526 crid = CRYPTOCAP_F_HARDWARE; 527 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 528 if (error) 529 goto bail; 530 531 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 532 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 533 thash); 534 535 if (cse == NULL) { 536 crypto_freesession(sid); 537 error = EINVAL; 538 goto bail; 539 } 540 sop->ses = cse->ses; 541 if (cmd == CIOCGSESSION2 542#ifdef COMPAT_FREEBSD32 543 || cmd == CIOCGSESSION232 544#endif 545 ) { 546 /* return hardware/driver id */ 547 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 548 } 549bail: 550 if (error) { 551 if (crie.cri_key) 552 free(crie.cri_key, M_XDATA); 553 if (cria.cri_key) 554 free(cria.cri_key, M_XDATA); 555 } 556#ifdef COMPAT_FREEBSD32 557 else { 558 if (cmd == CIOCGSESSION32) 559 session_op_to_32(sop, data); 560 else if (cmd == CIOCGSESSION232) 561 session2_op_to_32((struct session2_op *)sop, 562 data); 563 } 564#endif 565 break; 566 case CIOCFSESSION: 567 ses = *(u_int32_t *)data; 568 cse = csefind(fcr, ses); 569 if (cse == NULL) 570 return (EINVAL); 571 csedelete(fcr, cse); 572 error = csefree(cse); 573 break; 574 case CIOCCRYPT: 575#ifdef COMPAT_FREEBSD32 576 case CIOCCRYPT32: 577 if (cmd == CIOCCRYPT32) { 578 cop = &copc; 579 crypt_op_from_32(data, cop); 580 } else 581#endif 582 cop = (struct crypt_op *)data; 583 cse = csefind(fcr, cop->ses); 584 if (cse == NULL) 585 return (EINVAL); 586 error = cryptodev_op(cse, cop, active_cred, td); 587#ifdef COMPAT_FREEBSD32 588 if (error == 0 && cmd == CIOCCRYPT32) 589 crypt_op_to_32(cop, data); 590#endif 591 break; 592 case CIOCKEY: 593 case CIOCKEY2: 594#ifdef COMPAT_FREEBSD32 595 case CIOCKEY32: 596 case CIOCKEY232: 597#endif 598 if (!crypto_userasymcrypto) 599 return (EPERM); /* XXX compat? */ 600#ifdef COMPAT_FREEBSD32 601 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) { 602 kop = &kopc; 603 crypt_kop_from_32(data, kop); 604 } else 605#endif 606 kop = (struct crypt_kop *)data; 607 if (cmd == CIOCKEY 608#ifdef COMPAT_FREEBSD32 609 || cmd == CIOCKEY32 610#endif 611 ) { 612 /* NB: crypto core enforces s/w driver use */ 613 kop->crk_crid = 614 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 615 } 616 mtx_lock(&Giant); 617 error = cryptodev_key(kop); 618 mtx_unlock(&Giant); 619#ifdef COMPAT_FREEBSD32 620 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) 621 crypt_kop_to_32(kop, data); 622#endif 623 break; 624 case CIOCASYMFEAT: 625 if (!crypto_userasymcrypto) { 626 /* 627 * NB: if user asym crypto operations are 628 * not permitted return "no algorithms" 629 * so well-behaved applications will just 630 * fallback to doing them in software. 631 */ 632 *(int *)data = 0; 633 } else 634 error = crypto_getfeat((int *)data); 635 break; 636 case CIOCFINDDEV: 637 error = cryptodev_find((struct crypt_find_op *)data); 638 break; 639 default: 640 error = EINVAL; 641 break; 642 } 643 return (error); 644#undef SES2 645} 646 647static int cryptodev_cb(void *); 648 649 650static int 651cryptodev_op( 652 struct csession *cse, 653 struct crypt_op *cop, 654 struct ucred *active_cred, 655 struct thread *td) 656{ 657 struct cryptop *crp = NULL; 658 struct cryptodesc *crde = NULL, *crda = NULL; 659 int error; 660 661 if (cop->len > 256*1024-4) 662 return (E2BIG); 663 664 if (cse->txform) { 665 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 666 return (EINVAL); 667 } 668 669 cse->uio.uio_iov = &cse->iovec; 670 cse->uio.uio_iovcnt = 1; 671 cse->uio.uio_offset = 0; 672 cse->uio.uio_resid = cop->len; 673 cse->uio.uio_segflg = UIO_SYSSPACE; 674 cse->uio.uio_rw = UIO_WRITE; 675 cse->uio.uio_td = td; 676 cse->uio.uio_iov[0].iov_len = cop->len; 677 if (cse->thash) { 678 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 679 cse->uio.uio_resid += cse->thash->hashsize; 680 } 681 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len, 682 M_XDATA, M_WAITOK); 683 684 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 685 if (crp == NULL) { 686 error = ENOMEM; 687 goto bail; 688 } 689 690 if (cse->thash) { 691 crda = crp->crp_desc; 692 if (cse->txform) 693 crde = crda->crd_next; 694 } else { 695 if (cse->txform) 696 crde = crp->crp_desc; 697 else { 698 error = EINVAL; 699 goto bail; 700 } 701 } 702 703 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 704 goto bail; 705 706 if (crda) { 707 crda->crd_skip = 0; 708 crda->crd_len = cop->len; 709 crda->crd_inject = cop->len; 710 711 crda->crd_alg = cse->mac; 712 crda->crd_key = cse->mackey; 713 crda->crd_klen = cse->mackeylen * 8; 714 } 715 716 if (crde) { 717 if (cop->op == COP_ENCRYPT) 718 crde->crd_flags |= CRD_F_ENCRYPT; 719 else 720 crde->crd_flags &= ~CRD_F_ENCRYPT; 721 crde->crd_len = cop->len; 722 crde->crd_inject = 0; 723 724 crde->crd_alg = cse->cipher; 725 crde->crd_key = cse->key; 726 crde->crd_klen = cse->keylen * 8; 727 } 728 729 crp->crp_ilen = cop->len; 730 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 731 | (cop->flags & COP_F_BATCH); 732 crp->crp_buf = (caddr_t)&cse->uio; 733 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 734 crp->crp_sid = cse->sid; 735 crp->crp_opaque = (void *)cse; 736 737 if (cop->iv) { 738 if (crde == NULL) { 739 error = EINVAL; 740 goto bail; 741 } 742 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 743 error = EINVAL; 744 goto bail; 745 } 746 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 747 goto bail; 748 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 749 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 750 crde->crd_skip = 0; 751 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 752 crde->crd_skip = 0; 753 } else if (crde) { 754 crde->crd_flags |= CRD_F_IV_PRESENT; 755 crde->crd_skip = cse->txform->blocksize; 756 crde->crd_len -= cse->txform->blocksize; 757 } 758 759 if (cop->mac && crda == NULL) { 760 error = EINVAL; 761 goto bail; 762 } 763 764again: 765 /* 766 * Let the dispatch run unlocked, then, interlock against the 767 * callback before checking if the operation completed and going 768 * to sleep. This insures drivers don't inherit our lock which 769 * results in a lock order reversal between crypto_dispatch forced 770 * entry and the crypto_done callback into us. 771 */ 772 error = crypto_dispatch(crp); 773 mtx_lock(&cse->lock); 774 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 775 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 776 mtx_unlock(&cse->lock); 777 778 if (error != 0) 779 goto bail; 780 781 if (crp->crp_etype == EAGAIN) { 782 crp->crp_etype = 0; 783 crp->crp_flags &= ~CRYPTO_F_DONE; 784 goto again; 785 } 786 787 if (crp->crp_etype != 0) { 788 error = crp->crp_etype; 789 goto bail; 790 } 791 792 if (cse->error) { 793 error = cse->error; 794 goto bail; 795 } 796 797 if (cop->dst && 798 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 799 goto bail; 800 801 if (cop->mac && 802 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 803 cop->mac, cse->thash->hashsize))) 804 goto bail; 805 806bail: 807 if (crp) 808 crypto_freereq(crp); 809 if (cse->uio.uio_iov[0].iov_base) 810 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 811 812 return (error); 813} 814 815static int 816cryptodev_cb(void *op) 817{ 818 struct cryptop *crp = (struct cryptop *) op; 819 struct csession *cse = (struct csession *)crp->crp_opaque; 820 821 mtx_lock(&cse->lock); 822 cse->error = crp->crp_etype; 823 wakeup_one(crp); 824 mtx_unlock(&cse->lock); 825 return (0); 826} 827 828static int 829cryptodevkey_cb(void *op) 830{ 831 struct cryptkop *krp = (struct cryptkop *) op; 832 833 wakeup_one(krp); 834 return (0); 835} 836 837static int 838cryptodev_key(struct crypt_kop *kop) 839{ 840 struct cryptkop *krp = NULL; 841 int error = EINVAL; 842 int in, out, size, i; 843 844 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 845 return (EFBIG); 846 } 847 848 in = kop->crk_iparams; 849 out = kop->crk_oparams; 850 switch (kop->crk_op) { 851 case CRK_MOD_EXP: 852 if (in == 3 && out == 1) 853 break; 854 return (EINVAL); 855 case CRK_MOD_EXP_CRT: 856 if (in == 6 && out == 1) 857 break; 858 return (EINVAL); 859 case CRK_DSA_SIGN: 860 if (in == 5 && out == 2) 861 break; 862 return (EINVAL); 863 case CRK_DSA_VERIFY: 864 if (in == 7 && out == 0) 865 break; 866 return (EINVAL); 867 case CRK_DH_COMPUTE_KEY: 868 if (in == 3 && out == 1) 869 break; 870 return (EINVAL); 871 default: 872 return (EINVAL); 873 } 874 875 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 876 if (!krp) 877 return (ENOMEM); 878 krp->krp_op = kop->crk_op; 879 krp->krp_status = kop->crk_status; 880 krp->krp_iparams = kop->crk_iparams; 881 krp->krp_oparams = kop->crk_oparams; 882 krp->krp_crid = kop->crk_crid; 883 krp->krp_status = 0; 884 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 885 886 for (i = 0; i < CRK_MAXPARAM; i++) { 887 if (kop->crk_param[i].crp_nbits > 65536) 888 /* Limit is the same as in OpenBSD */ 889 goto fail; 890 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 891 } 892 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 893 size = (krp->krp_param[i].crp_nbits + 7) / 8; 894 if (size == 0) 895 continue; 896 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 897 if (i >= krp->krp_iparams) 898 continue; 899 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 900 if (error) 901 goto fail; 902 } 903 904 error = crypto_kdispatch(krp); 905 if (error) 906 goto fail; 907 error = tsleep(krp, PSOCK, "crydev", 0); 908 if (error) { 909 /* XXX can this happen? if so, how do we recover? */ 910 goto fail; 911 } 912 913 kop->crk_crid = krp->krp_crid; /* device that did the work */ 914 if (krp->krp_status != 0) { 915 error = krp->krp_status; 916 goto fail; 917 } 918 919 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 920 size = (krp->krp_param[i].crp_nbits + 7) / 8; 921 if (size == 0) 922 continue; 923 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 924 if (error) 925 goto fail; 926 } 927 928fail: 929 if (krp) { 930 kop->crk_status = krp->krp_status; 931 for (i = 0; i < CRK_MAXPARAM; i++) { 932 if (krp->krp_param[i].crp_p) 933 free(krp->krp_param[i].crp_p, M_XDATA); 934 } 935 free(krp, M_XDATA); 936 } 937 return (error); 938} 939 940static int 941cryptodev_find(struct crypt_find_op *find) 942{ 943 device_t dev; 944 945 if (find->crid != -1) { 946 dev = crypto_find_device_byhid(find->crid); 947 if (dev == NULL) 948 return (ENOENT); 949 strlcpy(find->name, device_get_nameunit(dev), 950 sizeof(find->name)); 951 } else { 952 find->crid = crypto_find_driver(find->name); 953 if (find->crid == -1) 954 return (ENOENT); 955 } 956 return (0); 957} 958 959/* ARGSUSED */ 960static int 961cryptof_poll( 962 struct file *fp, 963 int events, 964 struct ucred *active_cred, 965 struct thread *td) 966{ 967 968 return (0); 969} 970 971/* ARGSUSED */ 972static int 973cryptof_kqfilter(struct file *fp, struct knote *kn) 974{ 975 976 return (0); 977} 978 979/* ARGSUSED */ 980static int 981cryptof_stat( 982 struct file *fp, 983 struct stat *sb, 984 struct ucred *active_cred, 985 struct thread *td) 986{ 987 988 return (EOPNOTSUPP); 989} 990 991/* ARGSUSED */ 992static int 993cryptof_close(struct file *fp, struct thread *td) 994{ 995 struct fcrypt *fcr = fp->f_data; 996 struct csession *cse; 997 998 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 999 TAILQ_REMOVE(&fcr->csessions, cse, next); 1000 (void)csefree(cse); 1001 } 1002 free(fcr, M_XDATA); 1003 fp->f_data = NULL; 1004 return 0; 1005} 1006 1007static struct csession * 1008csefind(struct fcrypt *fcr, u_int ses) 1009{ 1010 struct csession *cse; 1011 1012 TAILQ_FOREACH(cse, &fcr->csessions, next) 1013 if (cse->ses == ses) 1014 return (cse); 1015 return (NULL); 1016} 1017 1018static int 1019csedelete(struct fcrypt *fcr, struct csession *cse_del) 1020{ 1021 struct csession *cse; 1022 1023 TAILQ_FOREACH(cse, &fcr->csessions, next) { 1024 if (cse == cse_del) { 1025 TAILQ_REMOVE(&fcr->csessions, cse, next); 1026 return (1); 1027 } 1028 } 1029 return (0); 1030} 1031 1032static struct csession * 1033cseadd(struct fcrypt *fcr, struct csession *cse) 1034{ 1035 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 1036 cse->ses = fcr->sesn++; 1037 return (cse); 1038} 1039 1040struct csession * 1041csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 1042 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 1043 struct enc_xform *txform, struct auth_hash *thash) 1044{ 1045 struct csession *cse; 1046 1047#ifdef INVARIANTS 1048 /* NB: required when mtx_init is built with INVARIANTS */ 1049 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO); 1050#else 1051 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT); 1052#endif 1053 if (cse == NULL) 1054 return NULL; 1055 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 1056 cse->key = key; 1057 cse->keylen = keylen/8; 1058 cse->mackey = mackey; 1059 cse->mackeylen = mackeylen/8; 1060 cse->sid = sid; 1061 cse->cipher = cipher; 1062 cse->mac = mac; 1063 cse->txform = txform; 1064 cse->thash = thash; 1065 cseadd(fcr, cse); 1066 return (cse); 1067} 1068 1069static int 1070csefree(struct csession *cse) 1071{ 1072 int error; 1073 1074 error = crypto_freesession(cse->sid); 1075 mtx_destroy(&cse->lock); 1076 if (cse->key) 1077 free(cse->key, M_XDATA); 1078 if (cse->mackey) 1079 free(cse->mackey, M_XDATA); 1080 free(cse, M_XDATA); 1081 return (error); 1082} 1083 1084static int 1085cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 1086{ 1087 return (0); 1088} 1089 1090static int 1091cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 1092{ 1093 return (EIO); 1094} 1095 1096static int 1097cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 1098{ 1099 return (EIO); 1100} 1101 1102static int 1103cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 1104{ 1105 struct file *f; 1106 struct fcrypt *fcr; 1107 int fd, error; 1108 1109 switch (cmd) { 1110 case CRIOGET: 1111 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK); 1112 TAILQ_INIT(&fcr->csessions); 1113 fcr->sesn = 0; 1114 1115 error = falloc(td, &f, &fd, 0); 1116 1117 if (error) { 1118 free(fcr, M_XDATA); 1119 return (error); 1120 } 1121 /* falloc automatically provides an extra reference to 'f'. */ 1122 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops); 1123 *(u_int32_t *)data = fd; 1124 fdrop(f, td); 1125 break; 1126 case CRIOFINDDEV: 1127 error = cryptodev_find((struct crypt_find_op *)data); 1128 break; 1129 case CRIOASYMFEAT: 1130 error = crypto_getfeat((int *)data); 1131 break; 1132 default: 1133 error = EINVAL; 1134 break; 1135 } 1136 return (error); 1137} 1138 1139static struct cdevsw crypto_cdevsw = { 1140 .d_version = D_VERSION, 1141 .d_flags = D_NEEDGIANT, 1142 .d_open = cryptoopen, 1143 .d_read = cryptoread, 1144 .d_write = cryptowrite, 1145 .d_ioctl = cryptoioctl, 1146 .d_name = "crypto", 1147}; 1148static struct cdev *crypto_dev; 1149 1150/* 1151 * Initialization code, both for static and dynamic loading. 1152 */ 1153static int 1154cryptodev_modevent(module_t mod, int type, void *unused) 1155{ 1156 switch (type) { 1157 case MOD_LOAD: 1158 if (bootverbose) 1159 printf("crypto: <crypto device>\n"); 1160 crypto_dev = make_dev(&crypto_cdevsw, 0, 1161 UID_ROOT, GID_WHEEL, 0666, 1162 "crypto"); 1163 return 0; 1164 case MOD_UNLOAD: 1165 /*XXX disallow if active sessions */ 1166 destroy_dev(crypto_dev); 1167 return 0; 1168 } 1169 return EINVAL; 1170} 1171 1172static moduledata_t cryptodev_mod = { 1173 "cryptodev", 1174 cryptodev_modevent, 1175 0 1176}; 1177MODULE_VERSION(cryptodev, 1); 1178DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 1179MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 1180MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 1181