cryptodev.c revision 275732
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 * Copyright (c) 2014 The FreeBSD Foundation 7 * All rights reserved. 8 * 9 * Portions of this software were developed by John-Mark Gurney 10 * under sponsorship of the FreeBSD Foundation and 11 * Rubicon Communications, LLC (Netgate). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 * 36 * Effort sponsored in part by the Defense Advanced Research Projects 37 * Agency (DARPA) and Air Force Research Laboratory, Air Force 38 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 39 */ 40 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: head/sys/opencrypto/cryptodev.c 275732 2014-12-12 19:56:36Z jmg $"); 43 44#include "opt_compat.h" 45#include "opt_kdtrace.h" 46 47#include <sys/param.h> 48#include <sys/systm.h> 49#include <sys/malloc.h> 50#include <sys/mbuf.h> 51#include <sys/lock.h> 52#include <sys/mutex.h> 53#include <sys/sysctl.h> 54#include <sys/file.h> 55#include <sys/filedesc.h> 56#include <sys/errno.h> 57#include <sys/uio.h> 58#include <sys/random.h> 59#include <sys/conf.h> 60#include <sys/kernel.h> 61#include <sys/module.h> 62#include <sys/fcntl.h> 63#include <sys/bus.h> 64#include <sys/user.h> 65#include <sys/sdt.h> 66 67#include <opencrypto/cryptodev.h> 68#include <opencrypto/xform.h> 69 70SDT_PROVIDER_DECLARE(opencrypto); 71 72SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/); 73 74#ifdef COMPAT_FREEBSD32 75#include <sys/mount.h> 76#include <compat/freebsd32/freebsd32.h> 77 78struct session_op32 { 79 u_int32_t cipher; 80 u_int32_t mac; 81 u_int32_t keylen; 82 u_int32_t key; 83 int mackeylen; 84 u_int32_t mackey; 85 u_int32_t ses; 86}; 87 88struct session2_op32 { 89 u_int32_t cipher; 90 u_int32_t mac; 91 u_int32_t keylen; 92 u_int32_t key; 93 int mackeylen; 94 u_int32_t mackey; 95 u_int32_t ses; 96 int crid; 97 int pad[4]; 98}; 99 100struct crypt_op32 { 101 u_int32_t ses; 102 u_int16_t op; 103 u_int16_t flags; 104 u_int len; 105 u_int32_t src, dst; 106 u_int32_t mac; 107 u_int32_t iv; 108}; 109 110struct crparam32 { 111 u_int32_t crp_p; 112 u_int crp_nbits; 113}; 114 115struct crypt_kop32 { 116 u_int crk_op; 117 u_int crk_status; 118 u_short crk_iparams; 119 u_short crk_oparams; 120 u_int crk_crid; 121 struct crparam32 crk_param[CRK_MAXPARAM]; 122}; 123 124struct cryptotstat32 { 125 struct timespec32 acc; 126 struct timespec32 min; 127 struct timespec32 max; 128 u_int32_t count; 129}; 130 131struct cryptostats32 { 132 u_int32_t cs_ops; 133 u_int32_t cs_errs; 134 u_int32_t cs_kops; 135 u_int32_t cs_kerrs; 136 u_int32_t cs_intrs; 137 u_int32_t cs_rets; 138 u_int32_t cs_blocks; 139 u_int32_t cs_kblocks; 140 struct cryptotstat32 cs_invoke; 141 struct cryptotstat32 cs_done; 142 struct cryptotstat32 cs_cb; 143 struct cryptotstat32 cs_finis; 144}; 145 146#define CIOCGSESSION32 _IOWR('c', 101, struct session_op32) 147#define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32) 148#define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32) 149#define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32) 150#define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32) 151 152static void 153session_op_from_32(const struct session_op32 *from, struct session_op *to) 154{ 155 156 CP(*from, *to, cipher); 157 CP(*from, *to, mac); 158 CP(*from, *to, keylen); 159 PTRIN_CP(*from, *to, key); 160 CP(*from, *to, mackeylen); 161 PTRIN_CP(*from, *to, mackey); 162 CP(*from, *to, ses); 163} 164 165static void 166session2_op_from_32(const struct session2_op32 *from, struct session2_op *to) 167{ 168 169 session_op_from_32((const struct session_op32 *)from, 170 (struct session_op *)to); 171 CP(*from, *to, crid); 172} 173 174static void 175session_op_to_32(const struct session_op *from, struct session_op32 *to) 176{ 177 178 CP(*from, *to, cipher); 179 CP(*from, *to, mac); 180 CP(*from, *to, keylen); 181 PTROUT_CP(*from, *to, key); 182 CP(*from, *to, mackeylen); 183 PTROUT_CP(*from, *to, mackey); 184 CP(*from, *to, ses); 185} 186 187static void 188session2_op_to_32(const struct session2_op *from, struct session2_op32 *to) 189{ 190 191 session_op_to_32((const struct session_op *)from, 192 (struct session_op32 *)to); 193 CP(*from, *to, crid); 194} 195 196static void 197crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to) 198{ 199 200 CP(*from, *to, ses); 201 CP(*from, *to, op); 202 CP(*from, *to, flags); 203 CP(*from, *to, len); 204 PTRIN_CP(*from, *to, src); 205 PTRIN_CP(*from, *to, dst); 206 PTRIN_CP(*from, *to, mac); 207 PTRIN_CP(*from, *to, iv); 208} 209 210static void 211crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to) 212{ 213 214 CP(*from, *to, ses); 215 CP(*from, *to, op); 216 CP(*from, *to, flags); 217 CP(*from, *to, len); 218 PTROUT_CP(*from, *to, src); 219 PTROUT_CP(*from, *to, dst); 220 PTROUT_CP(*from, *to, mac); 221 PTROUT_CP(*from, *to, iv); 222} 223 224static void 225crparam_from_32(const struct crparam32 *from, struct crparam *to) 226{ 227 228 PTRIN_CP(*from, *to, crp_p); 229 CP(*from, *to, crp_nbits); 230} 231 232static void 233crparam_to_32(const struct crparam *from, struct crparam32 *to) 234{ 235 236 PTROUT_CP(*from, *to, crp_p); 237 CP(*from, *to, crp_nbits); 238} 239 240static void 241crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to) 242{ 243 int i; 244 245 CP(*from, *to, crk_op); 246 CP(*from, *to, crk_status); 247 CP(*from, *to, crk_iparams); 248 CP(*from, *to, crk_oparams); 249 CP(*from, *to, crk_crid); 250 for (i = 0; i < CRK_MAXPARAM; i++) 251 crparam_from_32(&from->crk_param[i], &to->crk_param[i]); 252} 253 254static void 255crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to) 256{ 257 int i; 258 259 CP(*from, *to, crk_op); 260 CP(*from, *to, crk_status); 261 CP(*from, *to, crk_iparams); 262 CP(*from, *to, crk_oparams); 263 CP(*from, *to, crk_crid); 264 for (i = 0; i < CRK_MAXPARAM; i++) 265 crparam_to_32(&from->crk_param[i], &to->crk_param[i]); 266} 267#endif 268 269struct csession { 270 TAILQ_ENTRY(csession) next; 271 u_int64_t sid; 272 u_int32_t ses; 273 struct mtx lock; /* for op submission */ 274 275 u_int32_t cipher; 276 struct enc_xform *txform; 277 u_int32_t mac; 278 struct auth_hash *thash; 279 280 caddr_t key; 281 int keylen; 282 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 283 284 caddr_t mackey; 285 int mackeylen; 286 287 struct iovec iovec; 288 struct uio uio; 289 int error; 290}; 291 292struct fcrypt { 293 TAILQ_HEAD(csessionlist, csession) csessions; 294 int sesn; 295}; 296 297static int cryptof_ioctl(struct file *, u_long, void *, 298 struct ucred *, struct thread *); 299static int cryptof_stat(struct file *, struct stat *, 300 struct ucred *, struct thread *); 301static int cryptof_close(struct file *, struct thread *); 302static int cryptof_fill_kinfo(struct file *, struct kinfo_file *, 303 struct filedesc *); 304 305static struct fileops cryptofops = { 306 .fo_read = invfo_rdwr, 307 .fo_write = invfo_rdwr, 308 .fo_truncate = invfo_truncate, 309 .fo_ioctl = cryptof_ioctl, 310 .fo_poll = invfo_poll, 311 .fo_kqfilter = invfo_kqfilter, 312 .fo_stat = cryptof_stat, 313 .fo_close = cryptof_close, 314 .fo_chmod = invfo_chmod, 315 .fo_chown = invfo_chown, 316 .fo_sendfile = invfo_sendfile, 317 .fo_fill_kinfo = cryptof_fill_kinfo, 318}; 319 320static struct csession *csefind(struct fcrypt *, u_int); 321static int csedelete(struct fcrypt *, struct csession *); 322static struct csession *cseadd(struct fcrypt *, struct csession *); 323static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, 324 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 325 struct auth_hash *); 326static int csefree(struct csession *); 327 328static int cryptodev_op(struct csession *, struct crypt_op *, 329 struct ucred *, struct thread *td); 330static int cryptodev_aead(struct csession *, struct crypt_aead *, 331 struct ucred *, struct thread *); 332static int cryptodev_key(struct crypt_kop *); 333static int cryptodev_find(struct crypt_find_op *); 334 335/* 336 * Check a crypto identifier to see if it requested 337 * a software device/driver. This can be done either 338 * by device name/class or through search constraints. 339 */ 340static int 341checkforsoftware(int *cridp) 342{ 343 int crid; 344 345 crid = *cridp; 346 347 if (!crypto_devallowsoft) { 348 if (crid & CRYPTOCAP_F_SOFTWARE) { 349 if (crid & CRYPTOCAP_F_HARDWARE) { 350 *cridp = CRYPTOCAP_F_HARDWARE; 351 return 0; 352 } 353 return EINVAL; 354 } 355 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 356 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 357 return EINVAL; 358 } 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 crypt_aead *caead; 378 struct enc_xform *txform = NULL; 379 struct auth_hash *thash = NULL; 380 struct crypt_kop *kop; 381 u_int64_t sid; 382 u_int32_t ses; 383 int error = 0, crid; 384#ifdef COMPAT_FREEBSD32 385 struct session2_op sopc; 386 struct crypt_op copc; 387 struct crypt_kop kopc; 388#endif 389 390 switch (cmd) { 391 case CIOCGSESSION: 392 case CIOCGSESSION2: 393#ifdef COMPAT_FREEBSD32 394 case CIOCGSESSION32: 395 case CIOCGSESSION232: 396 if (cmd == CIOCGSESSION32) { 397 session_op_from_32(data, (struct session_op *)&sopc); 398 sop = (struct session_op *)&sopc; 399 } else if (cmd == CIOCGSESSION232) { 400 session2_op_from_32(data, &sopc); 401 sop = (struct session_op *)&sopc; 402 } else 403#endif 404 sop = (struct session_op *)data; 405 switch (sop->cipher) { 406 case 0: 407 break; 408 case CRYPTO_DES_CBC: 409 txform = &enc_xform_des; 410 break; 411 case CRYPTO_3DES_CBC: 412 txform = &enc_xform_3des; 413 break; 414 case CRYPTO_BLF_CBC: 415 txform = &enc_xform_blf; 416 break; 417 case CRYPTO_CAST_CBC: 418 txform = &enc_xform_cast5; 419 break; 420 case CRYPTO_SKIPJACK_CBC: 421 txform = &enc_xform_skipjack; 422 break; 423 case CRYPTO_AES_CBC: 424 txform = &enc_xform_rijndael128; 425 break; 426 case CRYPTO_AES_XTS: 427 txform = &enc_xform_aes_xts; 428 break; 429 case CRYPTO_NULL_CBC: 430 txform = &enc_xform_null; 431 break; 432 case CRYPTO_ARC4: 433 txform = &enc_xform_arc4; 434 break; 435 case CRYPTO_CAMELLIA_CBC: 436 txform = &enc_xform_camellia; 437 break; 438 case CRYPTO_AES_ICM: 439 txform = &enc_xform_aes_icm; 440 break; 441 case CRYPTO_AES_NIST_GCM_16: 442 txform = &enc_xform_aes_nist_gcm; 443 break; 444 445 default: 446 CRYPTDEB("invalid cipher"); 447 return (EINVAL); 448 } 449 450 switch (sop->mac) { 451 case 0: 452 break; 453 case CRYPTO_MD5_HMAC: 454 thash = &auth_hash_hmac_md5; 455 break; 456 case CRYPTO_SHA1_HMAC: 457 thash = &auth_hash_hmac_sha1; 458 break; 459 case CRYPTO_SHA2_256_HMAC: 460 thash = &auth_hash_hmac_sha2_256; 461 break; 462 case CRYPTO_SHA2_384_HMAC: 463 thash = &auth_hash_hmac_sha2_384; 464 break; 465 case CRYPTO_SHA2_512_HMAC: 466 thash = &auth_hash_hmac_sha2_512; 467 break; 468 case CRYPTO_RIPEMD160_HMAC: 469 thash = &auth_hash_hmac_ripemd_160; 470 break; 471 case CRYPTO_AES_128_NIST_GMAC: 472 thash = &auth_hash_nist_gmac_aes_128; 473 break; 474 case CRYPTO_AES_192_NIST_GMAC: 475 thash = &auth_hash_nist_gmac_aes_192; 476 break; 477 case CRYPTO_AES_256_NIST_GMAC: 478 thash = &auth_hash_nist_gmac_aes_256; 479 break; 480 481#ifdef notdef 482 case CRYPTO_MD5: 483 thash = &auth_hash_md5; 484 break; 485 case CRYPTO_SHA1: 486 thash = &auth_hash_sha1; 487 break; 488#endif 489 case CRYPTO_NULL_HMAC: 490 thash = &auth_hash_null; 491 break; 492 default: 493 CRYPTDEB("invalid mac"); 494 return (EINVAL); 495 } 496 497 bzero(&crie, sizeof(crie)); 498 bzero(&cria, sizeof(cria)); 499 500 if (txform) { 501 crie.cri_alg = txform->type; 502 crie.cri_klen = sop->keylen * 8; 503 if (sop->keylen > txform->maxkey || 504 sop->keylen < txform->minkey) { 505 CRYPTDEB("invalid cipher parameters"); 506 error = EINVAL; 507 goto bail; 508 } 509 510 crie.cri_key = malloc(crie.cri_klen / 8, 511 M_XDATA, M_WAITOK); 512 if ((error = copyin(sop->key, crie.cri_key, 513 crie.cri_klen / 8))) { 514 CRYPTDEB("invalid key"); 515 goto bail; 516 } 517 if (thash) 518 crie.cri_next = &cria; 519 } 520 521 if (thash) { 522 cria.cri_alg = thash->type; 523 cria.cri_klen = sop->mackeylen * 8; 524 if (sop->mackeylen != thash->keysize) { 525 CRYPTDEB("invalid mac key length"); 526 error = EINVAL; 527 goto bail; 528 } 529 530 if (cria.cri_klen) { 531 cria.cri_key = malloc(cria.cri_klen / 8, 532 M_XDATA, M_WAITOK); 533 if ((error = copyin(sop->mackey, cria.cri_key, 534 cria.cri_klen / 8))) { 535 CRYPTDEB("invalid mac key"); 536 goto bail; 537 } 538 } 539 } 540 541 /* NB: CIOCGSESSION2 has the crid */ 542 if (cmd == CIOCGSESSION2 543#ifdef COMPAT_FREEBSD32 544 || cmd == CIOCGSESSION232 545#endif 546 ) { 547 crid = SES2(sop)->crid; 548 error = checkforsoftware(&crid); 549 if (error) { 550 CRYPTDEB("checkforsoftware"); 551 goto bail; 552 } 553 } else 554 crid = CRYPTOCAP_F_HARDWARE; 555 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 556 if (error) { 557 CRYPTDEB("crypto_newsession"); 558 goto bail; 559 } 560 561 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 562 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 563 thash); 564 565 if (cse == NULL) { 566 crypto_freesession(sid); 567 error = EINVAL; 568 CRYPTDEB("csecreate"); 569 goto bail; 570 } 571 sop->ses = cse->ses; 572 if (cmd == CIOCGSESSION2 573#ifdef COMPAT_FREEBSD32 574 || cmd == CIOCGSESSION232 575#endif 576 ) { 577 /* return hardware/driver id */ 578 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 579 } 580bail: 581 if (error) { 582 if (crie.cri_key) 583 free(crie.cri_key, M_XDATA); 584 if (cria.cri_key) 585 free(cria.cri_key, M_XDATA); 586 } 587#ifdef COMPAT_FREEBSD32 588 else { 589 if (cmd == CIOCGSESSION32) 590 session_op_to_32(sop, data); 591 else if (cmd == CIOCGSESSION232) 592 session2_op_to_32((struct session2_op *)sop, 593 data); 594 } 595#endif 596 break; 597 case CIOCFSESSION: 598 ses = *(u_int32_t *)data; 599 cse = csefind(fcr, ses); 600 if (cse == NULL) 601 return (EINVAL); 602 csedelete(fcr, cse); 603 error = csefree(cse); 604 break; 605 case CIOCCRYPT: 606#ifdef COMPAT_FREEBSD32 607 case CIOCCRYPT32: 608 if (cmd == CIOCCRYPT32) { 609 cop = &copc; 610 crypt_op_from_32(data, cop); 611 } else 612#endif 613 cop = (struct crypt_op *)data; 614 cse = csefind(fcr, cop->ses); 615 if (cse == NULL) { 616 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 617 return (EINVAL); 618 } 619 error = cryptodev_op(cse, cop, active_cred, td); 620#ifdef COMPAT_FREEBSD32 621 if (error == 0 && cmd == CIOCCRYPT32) 622 crypt_op_to_32(cop, data); 623#endif 624 break; 625 case CIOCKEY: 626 case CIOCKEY2: 627#ifdef COMPAT_FREEBSD32 628 case CIOCKEY32: 629 case CIOCKEY232: 630#endif 631 if (!crypto_userasymcrypto) 632 return (EPERM); /* XXX compat? */ 633#ifdef COMPAT_FREEBSD32 634 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) { 635 kop = &kopc; 636 crypt_kop_from_32(data, kop); 637 } else 638#endif 639 kop = (struct crypt_kop *)data; 640 if (cmd == CIOCKEY 641#ifdef COMPAT_FREEBSD32 642 || cmd == CIOCKEY32 643#endif 644 ) { 645 /* NB: crypto core enforces s/w driver use */ 646 kop->crk_crid = 647 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 648 } 649 mtx_lock(&Giant); 650 error = cryptodev_key(kop); 651 mtx_unlock(&Giant); 652#ifdef COMPAT_FREEBSD32 653 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) 654 crypt_kop_to_32(kop, data); 655#endif 656 break; 657 case CIOCASYMFEAT: 658 if (!crypto_userasymcrypto) { 659 /* 660 * NB: if user asym crypto operations are 661 * not permitted return "no algorithms" 662 * so well-behaved applications will just 663 * fallback to doing them in software. 664 */ 665 *(int *)data = 0; 666 } else 667 error = crypto_getfeat((int *)data); 668 break; 669 case CIOCFINDDEV: 670 error = cryptodev_find((struct crypt_find_op *)data); 671 break; 672 case CIOCCRYPTAEAD: 673 caead = (struct crypt_aead *)data; 674 cse = csefind(fcr, caead->ses); 675 if (cse == NULL) 676 return (EINVAL); 677 error = cryptodev_aead(cse, caead, active_cred, td); 678 break; 679 default: 680 error = EINVAL; 681 break; 682 } 683 return (error); 684#undef SES2 685} 686 687static int cryptodev_cb(void *); 688 689 690static int 691cryptodev_op( 692 struct csession *cse, 693 struct crypt_op *cop, 694 struct ucred *active_cred, 695 struct thread *td) 696{ 697 struct cryptop *crp = NULL; 698 struct cryptodesc *crde = NULL, *crda = NULL; 699 int error; 700 701 if (cop->len > 256*1024-4) { 702 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 703 return (E2BIG); 704 } 705 706 if (cse->txform) { 707 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) { 708 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 709 return (EINVAL); 710 } 711 } 712 713 cse->uio.uio_iov = &cse->iovec; 714 cse->uio.uio_iovcnt = 1; 715 cse->uio.uio_offset = 0; 716 cse->uio.uio_resid = cop->len; 717 cse->uio.uio_segflg = UIO_SYSSPACE; 718 cse->uio.uio_rw = UIO_WRITE; 719 cse->uio.uio_td = td; 720 cse->uio.uio_iov[0].iov_len = cop->len; 721 if (cse->thash) { 722 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 723 cse->uio.uio_resid += cse->thash->hashsize; 724 } 725 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len, 726 M_XDATA, M_WAITOK); 727 728 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 729 if (crp == NULL) { 730 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 731 error = ENOMEM; 732 goto bail; 733 } 734 735 if (cse->thash) { 736 crda = crp->crp_desc; 737 if (cse->txform) 738 crde = crda->crd_next; 739 } else { 740 if (cse->txform) 741 crde = crp->crp_desc; 742 else { 743 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 744 error = EINVAL; 745 goto bail; 746 } 747 } 748 749 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, 750 cop->len))) { 751 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 752 goto bail; 753 } 754 755 if (crda) { 756 crda->crd_skip = 0; 757 crda->crd_len = cop->len; 758 crda->crd_inject = cop->len; 759 760 crda->crd_alg = cse->mac; 761 crda->crd_key = cse->mackey; 762 crda->crd_klen = cse->mackeylen * 8; 763 } 764 765 if (crde) { 766 if (cop->op == COP_ENCRYPT) 767 crde->crd_flags |= CRD_F_ENCRYPT; 768 else 769 crde->crd_flags &= ~CRD_F_ENCRYPT; 770 crde->crd_len = cop->len; 771 crde->crd_inject = 0; 772 773 crde->crd_alg = cse->cipher; 774 crde->crd_key = cse->key; 775 crde->crd_klen = cse->keylen * 8; 776 } 777 778 crp->crp_ilen = cop->len; 779 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 780 | (cop->flags & COP_F_BATCH); 781 crp->crp_buf = (caddr_t)&cse->uio; 782 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 783 crp->crp_sid = cse->sid; 784 crp->crp_opaque = (void *)cse; 785 786 if (cop->iv) { 787 if (crde == NULL) { 788 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 789 error = EINVAL; 790 goto bail; 791 } 792 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 793 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 794 error = EINVAL; 795 goto bail; 796 } 797 if ((error = copyin(cop->iv, cse->tmp_iv, 798 cse->txform->blocksize))) { 799 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 800 goto bail; 801 } 802 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 803 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 804 crde->crd_skip = 0; 805 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 806 crde->crd_skip = 0; 807 } else if (crde) { 808 crde->crd_flags |= CRD_F_IV_PRESENT; 809 crde->crd_skip = cse->txform->blocksize; 810 crde->crd_len -= cse->txform->blocksize; 811 } 812 813 if (cop->mac && crda == NULL) { 814 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 815 error = EINVAL; 816 goto bail; 817 } 818 819again: 820 /* 821 * Let the dispatch run unlocked, then, interlock against the 822 * callback before checking if the operation completed and going 823 * to sleep. This insures drivers don't inherit our lock which 824 * results in a lock order reversal between crypto_dispatch forced 825 * entry and the crypto_done callback into us. 826 */ 827 error = crypto_dispatch(crp); 828 mtx_lock(&cse->lock); 829 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 830 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 831 mtx_unlock(&cse->lock); 832 833 if (error != 0) { 834 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 835 goto bail; 836 } 837 838 if (crp->crp_etype == EAGAIN) { 839 crp->crp_etype = 0; 840 crp->crp_flags &= ~CRYPTO_F_DONE; 841 goto again; 842 } 843 844 if (crp->crp_etype != 0) { 845 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 846 error = crp->crp_etype; 847 goto bail; 848 } 849 850 if (cse->error) { 851 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 852 error = cse->error; 853 goto bail; 854 } 855 856 if (cop->dst && 857 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, 858 cop->len))) { 859 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 860 goto bail; 861 } 862 863 if (cop->mac && 864 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 865 cop->mac, cse->thash->hashsize))) { 866 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 867 goto bail; 868 } 869 870bail: 871 if (crp) 872 crypto_freereq(crp); 873 if (cse->uio.uio_iov[0].iov_base) 874 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 875 876 return (error); 877} 878 879static int 880cryptodev_aead( 881 struct csession *cse, 882 struct crypt_aead *caead, 883 struct ucred *active_cred, 884 struct thread *td) 885{ 886 struct uio *uio; 887 struct cryptop *crp = NULL; 888 struct cryptodesc *crde = NULL, *crda = NULL; 889 int error; 890 891 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) 892 return (E2BIG); 893 894 if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL || 895 (caead->len % cse->txform->blocksize) != 0) 896 return (EINVAL); 897 898 uio = &cse->uio; 899 uio->uio_iov = &cse->iovec; 900 uio->uio_iovcnt = 1; 901 uio->uio_offset = 0; 902 uio->uio_resid = caead->len + caead->aadlen + cse->thash->hashsize; 903 uio->uio_segflg = UIO_SYSSPACE; 904 uio->uio_rw = UIO_WRITE; 905 uio->uio_td = td; 906 uio->uio_iov[0].iov_len = uio->uio_resid; 907 908 uio->uio_iov[0].iov_base = malloc(uio->uio_iov[0].iov_len, 909 M_XDATA, M_WAITOK); 910 911 crp = crypto_getreq(2); 912 if (crp == NULL) { 913 error = ENOMEM; 914 goto bail; 915 } 916 917 crda = crp->crp_desc; 918 crde = crda->crd_next; 919 920 if ((error = copyin(caead->src, cse->uio.uio_iov[0].iov_base, 921 caead->len))) 922 goto bail; 923 924 if ((error = copyin(caead->aad, (char *)cse->uio.uio_iov[0].iov_base + 925 caead->len, caead->aadlen))) 926 goto bail; 927 928 crda->crd_skip = caead->len; 929 crda->crd_len = caead->aadlen; 930 crda->crd_inject = caead->len + caead->aadlen; 931 932 crda->crd_alg = cse->mac; 933 crda->crd_key = cse->mackey; 934 crda->crd_klen = cse->mackeylen * 8; 935 936 if (caead->op == COP_ENCRYPT) 937 crde->crd_flags |= CRD_F_ENCRYPT; 938 else 939 crde->crd_flags &= ~CRD_F_ENCRYPT; 940 /* crde->crd_skip set below */ 941 crde->crd_len = caead->len; 942 crde->crd_inject = 0; 943 944 crde->crd_alg = cse->cipher; 945 crde->crd_key = cse->key; 946 crde->crd_klen = cse->keylen * 8; 947 948 crp->crp_ilen = caead->len + caead->aadlen; 949 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 950 | (caead->flags & COP_F_BATCH); 951 crp->crp_buf = (caddr_t)&cse->uio.uio_iov; 952 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 953 crp->crp_sid = cse->sid; 954 crp->crp_opaque = (void *)cse; 955 956 if (caead->iv) { 957 if (caead->ivlen > sizeof cse->tmp_iv) { 958 error = EINVAL; 959 goto bail; 960 } 961 962 if ((error = copyin(caead->iv, cse->tmp_iv, caead->ivlen))) 963 goto bail; 964 bcopy(cse->tmp_iv, crde->crd_iv, caead->ivlen); 965 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 966 crde->crd_skip = 0; 967 } else { 968 crde->crd_flags |= CRD_F_IV_PRESENT; 969 crde->crd_skip = cse->txform->blocksize; 970 crde->crd_len -= cse->txform->blocksize; 971 } 972 973 if ((error = copyin(caead->tag, (caddr_t)cse->uio.uio_iov[0].iov_base + 974 caead->len + caead->aadlen, cse->thash->hashsize))) 975 goto bail; 976again: 977 /* 978 * Let the dispatch run unlocked, then, interlock against the 979 * callback before checking if the operation completed and going 980 * to sleep. This insures drivers don't inherit our lock which 981 * results in a lock order reversal between crypto_dispatch forced 982 * entry and the crypto_done callback into us. 983 */ 984 error = crypto_dispatch(crp); 985 mtx_lock(&cse->lock); 986 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 987 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 988 mtx_unlock(&cse->lock); 989 990 if (error != 0) 991 goto bail; 992 993 if (crp->crp_etype == EAGAIN) { 994 crp->crp_etype = 0; 995 crp->crp_flags &= ~CRYPTO_F_DONE; 996 goto again; 997 } 998 999 if (crp->crp_etype != 0) { 1000 error = crp->crp_etype; 1001 goto bail; 1002 } 1003 1004 if (cse->error) { 1005 error = cse->error; 1006 goto bail; 1007 } 1008 1009 if (caead->dst && (error = copyout(cse->uio.uio_iov[0].iov_base, 1010 caead->dst, caead->len))) 1011 goto bail; 1012 1013 if ((error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + 1014 caead->len + caead->aadlen, caead->tag, cse->thash->hashsize))) 1015 goto bail; 1016 1017bail: 1018 crypto_freereq(crp); 1019 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 1020 1021 return (error); 1022} 1023 1024static int 1025cryptodev_cb(void *op) 1026{ 1027 struct cryptop *crp = (struct cryptop *) op; 1028 struct csession *cse = (struct csession *)crp->crp_opaque; 1029 1030 mtx_lock(&cse->lock); 1031 cse->error = crp->crp_etype; 1032 wakeup_one(crp); 1033 mtx_unlock(&cse->lock); 1034 return (0); 1035} 1036 1037static int 1038cryptodevkey_cb(void *op) 1039{ 1040 struct cryptkop *krp = (struct cryptkop *) op; 1041 1042 wakeup_one(krp); 1043 return (0); 1044} 1045 1046static int 1047cryptodev_key(struct crypt_kop *kop) 1048{ 1049 struct cryptkop *krp = NULL; 1050 int error = EINVAL; 1051 int in, out, size, i; 1052 1053 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 1054 return (EFBIG); 1055 } 1056 1057 in = kop->crk_iparams; 1058 out = kop->crk_oparams; 1059 switch (kop->crk_op) { 1060 case CRK_MOD_EXP: 1061 if (in == 3 && out == 1) 1062 break; 1063 return (EINVAL); 1064 case CRK_MOD_EXP_CRT: 1065 if (in == 6 && out == 1) 1066 break; 1067 return (EINVAL); 1068 case CRK_DSA_SIGN: 1069 if (in == 5 && out == 2) 1070 break; 1071 return (EINVAL); 1072 case CRK_DSA_VERIFY: 1073 if (in == 7 && out == 0) 1074 break; 1075 return (EINVAL); 1076 case CRK_DH_COMPUTE_KEY: 1077 if (in == 3 && out == 1) 1078 break; 1079 return (EINVAL); 1080 default: 1081 return (EINVAL); 1082 } 1083 1084 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 1085 if (!krp) 1086 return (ENOMEM); 1087 krp->krp_op = kop->crk_op; 1088 krp->krp_status = kop->crk_status; 1089 krp->krp_iparams = kop->crk_iparams; 1090 krp->krp_oparams = kop->crk_oparams; 1091 krp->krp_crid = kop->crk_crid; 1092 krp->krp_status = 0; 1093 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 1094 1095 for (i = 0; i < CRK_MAXPARAM; i++) { 1096 if (kop->crk_param[i].crp_nbits > 65536) 1097 /* Limit is the same as in OpenBSD */ 1098 goto fail; 1099 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 1100 } 1101 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 1102 size = (krp->krp_param[i].crp_nbits + 7) / 8; 1103 if (size == 0) 1104 continue; 1105 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 1106 if (i >= krp->krp_iparams) 1107 continue; 1108 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 1109 if (error) 1110 goto fail; 1111 } 1112 1113 error = crypto_kdispatch(krp); 1114 if (error) 1115 goto fail; 1116 error = tsleep(krp, PSOCK, "crydev", 0); 1117 if (error) { 1118 /* XXX can this happen? if so, how do we recover? */ 1119 goto fail; 1120 } 1121 1122 kop->crk_crid = krp->krp_crid; /* device that did the work */ 1123 if (krp->krp_status != 0) { 1124 error = krp->krp_status; 1125 goto fail; 1126 } 1127 1128 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 1129 size = (krp->krp_param[i].crp_nbits + 7) / 8; 1130 if (size == 0) 1131 continue; 1132 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 1133 if (error) 1134 goto fail; 1135 } 1136 1137fail: 1138 if (krp) { 1139 kop->crk_status = krp->krp_status; 1140 for (i = 0; i < CRK_MAXPARAM; i++) { 1141 if (krp->krp_param[i].crp_p) 1142 free(krp->krp_param[i].crp_p, M_XDATA); 1143 } 1144 free(krp, M_XDATA); 1145 } 1146 return (error); 1147} 1148 1149static int 1150cryptodev_find(struct crypt_find_op *find) 1151{ 1152 device_t dev; 1153 size_t fnlen = sizeof find->name; 1154 1155 if (find->crid != -1) { 1156 dev = crypto_find_device_byhid(find->crid); 1157 if (dev == NULL) 1158 return (ENOENT); 1159 strncpy(find->name, device_get_nameunit(dev), fnlen); 1160 find->name[fnlen - 1] = '\x0'; 1161 } else { 1162 find->name[fnlen - 1] = '\x0'; 1163 find->crid = crypto_find_driver(find->name); 1164 if (find->crid == -1) 1165 return (ENOENT); 1166 } 1167 return (0); 1168} 1169 1170/* ARGSUSED */ 1171static int 1172cryptof_stat( 1173 struct file *fp, 1174 struct stat *sb, 1175 struct ucred *active_cred, 1176 struct thread *td) 1177{ 1178 1179 return (EOPNOTSUPP); 1180} 1181 1182/* ARGSUSED */ 1183static int 1184cryptof_close(struct file *fp, struct thread *td) 1185{ 1186 struct fcrypt *fcr = fp->f_data; 1187 struct csession *cse; 1188 1189 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 1190 TAILQ_REMOVE(&fcr->csessions, cse, next); 1191 (void)csefree(cse); 1192 } 1193 free(fcr, M_XDATA); 1194 fp->f_data = NULL; 1195 return 0; 1196} 1197 1198static int 1199cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp) 1200{ 1201 1202 kif->kf_type = KF_TYPE_CRYPTO; 1203 return (0); 1204} 1205 1206static struct csession * 1207csefind(struct fcrypt *fcr, u_int ses) 1208{ 1209 struct csession *cse; 1210 1211 TAILQ_FOREACH(cse, &fcr->csessions, next) 1212 if (cse->ses == ses) 1213 return (cse); 1214 return (NULL); 1215} 1216 1217static int 1218csedelete(struct fcrypt *fcr, struct csession *cse_del) 1219{ 1220 struct csession *cse; 1221 1222 TAILQ_FOREACH(cse, &fcr->csessions, next) { 1223 if (cse == cse_del) { 1224 TAILQ_REMOVE(&fcr->csessions, cse, next); 1225 return (1); 1226 } 1227 } 1228 return (0); 1229} 1230 1231static struct csession * 1232cseadd(struct fcrypt *fcr, struct csession *cse) 1233{ 1234 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 1235 cse->ses = fcr->sesn++; 1236 return (cse); 1237} 1238 1239struct csession * 1240csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 1241 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 1242 struct enc_xform *txform, struct auth_hash *thash) 1243{ 1244 struct csession *cse; 1245 1246 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO); 1247 if (cse == NULL) 1248 return NULL; 1249 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 1250 cse->key = key; 1251 cse->keylen = keylen/8; 1252 cse->mackey = mackey; 1253 cse->mackeylen = mackeylen/8; 1254 cse->sid = sid; 1255 cse->cipher = cipher; 1256 cse->mac = mac; 1257 cse->txform = txform; 1258 cse->thash = thash; 1259 cseadd(fcr, cse); 1260 return (cse); 1261} 1262 1263static int 1264csefree(struct csession *cse) 1265{ 1266 int error; 1267 1268 error = crypto_freesession(cse->sid); 1269 mtx_destroy(&cse->lock); 1270 if (cse->key) 1271 free(cse->key, M_XDATA); 1272 if (cse->mackey) 1273 free(cse->mackey, M_XDATA); 1274 free(cse, M_XDATA); 1275 return (error); 1276} 1277 1278static int 1279cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 1280{ 1281 return (0); 1282} 1283 1284static int 1285cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 1286{ 1287 return (EIO); 1288} 1289 1290static int 1291cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 1292{ 1293 return (EIO); 1294} 1295 1296static int 1297cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 1298{ 1299 struct file *f; 1300 struct fcrypt *fcr; 1301 int fd, error; 1302 1303 switch (cmd) { 1304 case CRIOGET: 1305 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK); 1306 TAILQ_INIT(&fcr->csessions); 1307 fcr->sesn = 0; 1308 1309 error = falloc(td, &f, &fd, 0); 1310 1311 if (error) { 1312 free(fcr, M_XDATA); 1313 return (error); 1314 } 1315 /* falloc automatically provides an extra reference to 'f'. */ 1316 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops); 1317 *(u_int32_t *)data = fd; 1318 fdrop(f, td); 1319 break; 1320 case CRIOFINDDEV: 1321 error = cryptodev_find((struct crypt_find_op *)data); 1322 break; 1323 case CRIOASYMFEAT: 1324 error = crypto_getfeat((int *)data); 1325 break; 1326 default: 1327 error = EINVAL; 1328 break; 1329 } 1330 return (error); 1331} 1332 1333static struct cdevsw crypto_cdevsw = { 1334 .d_version = D_VERSION, 1335 .d_flags = D_NEEDGIANT, 1336 .d_open = cryptoopen, 1337 .d_read = cryptoread, 1338 .d_write = cryptowrite, 1339 .d_ioctl = cryptoioctl, 1340 .d_name = "crypto", 1341}; 1342static struct cdev *crypto_dev; 1343 1344/* 1345 * Initialization code, both for static and dynamic loading. 1346 */ 1347static int 1348cryptodev_modevent(module_t mod, int type, void *unused) 1349{ 1350 switch (type) { 1351 case MOD_LOAD: 1352 if (bootverbose) 1353 printf("crypto: <crypto device>\n"); 1354 crypto_dev = make_dev(&crypto_cdevsw, 0, 1355 UID_ROOT, GID_WHEEL, 0666, 1356 "crypto"); 1357 return 0; 1358 case MOD_UNLOAD: 1359 /*XXX disallow if active sessions */ 1360 destroy_dev(crypto_dev); 1361 return 0; 1362 } 1363 return EINVAL; 1364} 1365 1366static moduledata_t cryptodev_mod = { 1367 "cryptodev", 1368 cryptodev_modevent, 1369 0 1370}; 1371MODULE_VERSION(cryptodev, 1); 1372DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 1373MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 1374MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 1375