cryptodev.c revision 184205
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 184205 2008-10-23 15:53:51Z des $"); 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/malloc.h> 41#include <sys/mbuf.h> 42#include <sys/lock.h> 43#include <sys/mutex.h> 44#include <sys/sysctl.h> 45#include <sys/file.h> 46#include <sys/filedesc.h> 47#include <sys/errno.h> 48#include <sys/uio.h> 49#include <sys/random.h> 50#include <sys/conf.h> 51#include <sys/kernel.h> 52#include <sys/module.h> 53#include <sys/fcntl.h> 54#include <sys/bus.h> 55 56#include <opencrypto/cryptodev.h> 57#include <opencrypto/xform.h> 58 59struct csession { 60 TAILQ_ENTRY(csession) next; 61 u_int64_t sid; 62 u_int32_t ses; 63 struct mtx lock; /* for op submission */ 64 65 u_int32_t cipher; 66 struct enc_xform *txform; 67 u_int32_t mac; 68 struct auth_hash *thash; 69 70 caddr_t key; 71 int keylen; 72 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 73 74 caddr_t mackey; 75 int mackeylen; 76 77 struct iovec iovec; 78 struct uio uio; 79 int error; 80}; 81 82struct fcrypt { 83 TAILQ_HEAD(csessionlist, csession) csessions; 84 int sesn; 85}; 86 87static int cryptof_rw(struct file *fp, struct uio *uio, 88 struct ucred *cred, int flags, struct thread *); 89static int cryptof_truncate(struct file *, off_t, struct ucred *, 90 struct thread *); 91static int cryptof_ioctl(struct file *, u_long, void *, 92 struct ucred *, struct thread *); 93static int cryptof_poll(struct file *, int, struct ucred *, struct thread *); 94static int cryptof_kqfilter(struct file *, struct knote *); 95static int cryptof_stat(struct file *, struct stat *, 96 struct ucred *, struct thread *); 97static int cryptof_close(struct file *, struct thread *); 98 99static struct fileops cryptofops = { 100 .fo_read = cryptof_rw, 101 .fo_write = cryptof_rw, 102 .fo_truncate = cryptof_truncate, 103 .fo_ioctl = cryptof_ioctl, 104 .fo_poll = cryptof_poll, 105 .fo_kqfilter = cryptof_kqfilter, 106 .fo_stat = cryptof_stat, 107 .fo_close = cryptof_close 108}; 109 110static struct csession *csefind(struct fcrypt *, u_int); 111static int csedelete(struct fcrypt *, struct csession *); 112static struct csession *cseadd(struct fcrypt *, struct csession *); 113static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, 114 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 115 struct auth_hash *); 116static int csefree(struct csession *); 117 118static int cryptodev_op(struct csession *, struct crypt_op *, 119 struct ucred *, struct thread *td); 120static int cryptodev_key(struct crypt_kop *); 121static int cryptodev_find(struct crypt_find_op *); 122 123static int 124cryptof_rw( 125 struct file *fp, 126 struct uio *uio, 127 struct ucred *active_cred, 128 int flags, 129 struct thread *td) 130{ 131 132 return (EIO); 133} 134 135static int 136cryptof_truncate( 137 struct file *fp, 138 off_t length, 139 struct ucred *active_cred, 140 struct thread *td) 141{ 142 143 return (EINVAL); 144} 145 146/* 147 * Check a crypto identifier to see if it requested 148 * a software device/driver. This can be done either 149 * by device name/class or through search constraints. 150 */ 151static int 152checkforsoftware(int crid) 153{ 154 if (crid & CRYPTOCAP_F_SOFTWARE) 155 return EINVAL; /* XXX */ 156 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 157 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 158 return EINVAL; /* XXX */ 159 return 0; 160} 161 162/* ARGSUSED */ 163static int 164cryptof_ioctl( 165 struct file *fp, 166 u_long cmd, 167 void *data, 168 struct ucred *active_cred, 169 struct thread *td) 170{ 171#define SES2(p) ((struct session2_op *)p) 172 struct cryptoini cria, crie; 173 struct fcrypt *fcr = fp->f_data; 174 struct csession *cse; 175 struct session_op *sop; 176 struct crypt_op *cop; 177 struct enc_xform *txform = NULL; 178 struct auth_hash *thash = NULL; 179 struct crypt_kop *kop; 180 u_int64_t sid; 181 u_int32_t ses; 182 int error = 0, crid; 183 184 switch (cmd) { 185 case CIOCGSESSION: 186 case CIOCGSESSION2: 187 sop = (struct session_op *)data; 188 switch (sop->cipher) { 189 case 0: 190 break; 191 case CRYPTO_DES_CBC: 192 txform = &enc_xform_des; 193 break; 194 case CRYPTO_3DES_CBC: 195 txform = &enc_xform_3des; 196 break; 197 case CRYPTO_BLF_CBC: 198 txform = &enc_xform_blf; 199 break; 200 case CRYPTO_CAST_CBC: 201 txform = &enc_xform_cast5; 202 break; 203 case CRYPTO_SKIPJACK_CBC: 204 txform = &enc_xform_skipjack; 205 break; 206 case CRYPTO_AES_CBC: 207 txform = &enc_xform_rijndael128; 208 break; 209 case CRYPTO_NULL_CBC: 210 txform = &enc_xform_null; 211 break; 212 case CRYPTO_ARC4: 213 txform = &enc_xform_arc4; 214 break; 215 case CRYPTO_CAMELLIA_CBC: 216 txform = &enc_xform_camellia; 217 break; 218 default: 219 return (EINVAL); 220 } 221 222 switch (sop->mac) { 223 case 0: 224 break; 225 case CRYPTO_MD5_HMAC: 226 thash = &auth_hash_hmac_md5; 227 break; 228 case CRYPTO_SHA1_HMAC: 229 thash = &auth_hash_hmac_sha1; 230 break; 231 case CRYPTO_SHA2_256_HMAC: 232 thash = &auth_hash_hmac_sha2_256; 233 break; 234 case CRYPTO_SHA2_384_HMAC: 235 thash = &auth_hash_hmac_sha2_384; 236 break; 237 case CRYPTO_SHA2_512_HMAC: 238 thash = &auth_hash_hmac_sha2_512; 239 break; 240 case CRYPTO_RIPEMD160_HMAC: 241 thash = &auth_hash_hmac_ripemd_160; 242 break; 243#ifdef notdef 244 case CRYPTO_MD5: 245 thash = &auth_hash_md5; 246 break; 247 case CRYPTO_SHA1: 248 thash = &auth_hash_sha1; 249 break; 250#endif 251 case CRYPTO_NULL_HMAC: 252 thash = &auth_hash_null; 253 break; 254 default: 255 return (EINVAL); 256 } 257 258 bzero(&crie, sizeof(crie)); 259 bzero(&cria, sizeof(cria)); 260 261 if (txform) { 262 crie.cri_alg = txform->type; 263 crie.cri_klen = sop->keylen * 8; 264 if (sop->keylen > txform->maxkey || 265 sop->keylen < txform->minkey) { 266 error = EINVAL; 267 goto bail; 268 } 269 270 crie.cri_key = malloc( crie.cri_klen / 8, M_XDATA, M_WAITOK); 271 if ((error = copyin(sop->key, crie.cri_key, 272 crie.cri_klen / 8))) 273 goto bail; 274 if (thash) 275 crie.cri_next = &cria; 276 } 277 278 if (thash) { 279 cria.cri_alg = thash->type; 280 cria.cri_klen = sop->mackeylen * 8; 281 if (sop->mackeylen != thash->keysize) { 282 error = EINVAL; 283 goto bail; 284 } 285 286 if (cria.cri_klen) { 287 cria.cri_key = malloc( cria.cri_klen / 8, M_XDATA, M_WAITOK); 288 if ((error = copyin(sop->mackey, cria.cri_key, 289 cria.cri_klen / 8))) 290 goto bail; 291 } 292 } 293 294 /* NB: CIOGSESSION2 has the crid */ 295 if (cmd == CIOCGSESSION2) { 296 crid = SES2(sop)->crid; 297 error = checkforsoftware(crid); 298 if (error) 299 goto bail; 300 } else 301 crid = CRYPTOCAP_F_HARDWARE; 302 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 303 if (error) 304 goto bail; 305 306 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 307 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 308 thash); 309 310 if (cse == NULL) { 311 crypto_freesession(sid); 312 error = EINVAL; 313 goto bail; 314 } 315 sop->ses = cse->ses; 316 if (cmd == CIOCGSESSION2) { 317 /* return hardware/driver id */ 318 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 319 } 320bail: 321 if (error) { 322 if (crie.cri_key) 323 free(crie.cri_key, M_XDATA); 324 if (cria.cri_key) 325 free(cria.cri_key, M_XDATA); 326 } 327 break; 328 case CIOCFSESSION: 329 ses = *(u_int32_t *)data; 330 cse = csefind(fcr, ses); 331 if (cse == NULL) 332 return (EINVAL); 333 csedelete(fcr, cse); 334 error = csefree(cse); 335 break; 336 case CIOCCRYPT: 337 cop = (struct crypt_op *)data; 338 cse = csefind(fcr, cop->ses); 339 if (cse == NULL) 340 return (EINVAL); 341 error = cryptodev_op(cse, cop, active_cred, td); 342 break; 343 case CIOCKEY: 344 case CIOCKEY2: 345 if (!crypto_userasymcrypto) 346 return (EPERM); /* XXX compat? */ 347 mtx_lock(&Giant); 348 kop = (struct crypt_kop *)data; 349 if (cmd == CIOCKEY) { 350 /* NB: crypto core enforces s/w driver use */ 351 kop->crk_crid = 352 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 353 } 354 error = cryptodev_key(kop); 355 mtx_unlock(&Giant); 356 break; 357 case CIOCASYMFEAT: 358 if (!crypto_userasymcrypto) { 359 /* 360 * NB: if user asym crypto operations are 361 * not permitted return "no algorithms" 362 * so well-behaved applications will just 363 * fallback to doing them in software. 364 */ 365 *(int *)data = 0; 366 } else 367 error = crypto_getfeat((int *)data); 368 break; 369 case CIOCFINDDEV: 370 error = cryptodev_find((struct crypt_find_op *)data); 371 break; 372 default: 373 error = EINVAL; 374 break; 375 } 376 return (error); 377#undef SES2 378} 379 380static int cryptodev_cb(void *); 381 382 383static int 384cryptodev_op( 385 struct csession *cse, 386 struct crypt_op *cop, 387 struct ucred *active_cred, 388 struct thread *td) 389{ 390 struct cryptop *crp = NULL; 391 struct cryptodesc *crde = NULL, *crda = NULL; 392 int error; 393 394 if (cop->len > 256*1024-4) 395 return (E2BIG); 396 397 if (cse->txform) { 398 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 399 return (EINVAL); 400 } 401 402 cse->uio.uio_iov = &cse->iovec; 403 cse->uio.uio_iovcnt = 1; 404 cse->uio.uio_offset = 0; 405 cse->uio.uio_resid = cop->len; 406 cse->uio.uio_segflg = UIO_SYSSPACE; 407 cse->uio.uio_rw = UIO_WRITE; 408 cse->uio.uio_td = td; 409 cse->uio.uio_iov[0].iov_len = cop->len; 410 if (cse->thash) 411 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 412 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len, 413 M_XDATA, M_WAITOK); 414 415 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 416 if (crp == NULL) { 417 error = ENOMEM; 418 goto bail; 419 } 420 421 if (cse->thash) { 422 crda = crp->crp_desc; 423 if (cse->txform) 424 crde = crda->crd_next; 425 } else { 426 if (cse->txform) 427 crde = crp->crp_desc; 428 else { 429 error = EINVAL; 430 goto bail; 431 } 432 } 433 434 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 435 goto bail; 436 437 if (crda) { 438 crda->crd_skip = 0; 439 crda->crd_len = cop->len; 440 crda->crd_inject = cop->len; 441 442 crda->crd_alg = cse->mac; 443 crda->crd_key = cse->mackey; 444 crda->crd_klen = cse->mackeylen * 8; 445 } 446 447 if (crde) { 448 if (cop->op == COP_ENCRYPT) 449 crde->crd_flags |= CRD_F_ENCRYPT; 450 else 451 crde->crd_flags &= ~CRD_F_ENCRYPT; 452 crde->crd_len = cop->len; 453 crde->crd_inject = 0; 454 455 crde->crd_alg = cse->cipher; 456 crde->crd_key = cse->key; 457 crde->crd_klen = cse->keylen * 8; 458 } 459 460 crp->crp_ilen = cop->len; 461 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 462 | (cop->flags & COP_F_BATCH); 463 crp->crp_buf = (caddr_t)&cse->uio; 464 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 465 crp->crp_sid = cse->sid; 466 crp->crp_opaque = (void *)cse; 467 468 if (cop->iv) { 469 if (crde == NULL) { 470 error = EINVAL; 471 goto bail; 472 } 473 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 474 error = EINVAL; 475 goto bail; 476 } 477 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 478 goto bail; 479 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 480 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 481 crde->crd_skip = 0; 482 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 483 crde->crd_skip = 0; 484 } else if (crde) { 485 crde->crd_flags |= CRD_F_IV_PRESENT; 486 crde->crd_skip = cse->txform->blocksize; 487 crde->crd_len -= cse->txform->blocksize; 488 } 489 490 if (cop->mac && crda == NULL) { 491 error = EINVAL; 492 goto bail; 493 } 494 495 /* 496 * Let the dispatch run unlocked, then, interlock against the 497 * callback before checking if the operation completed and going 498 * to sleep. This insures drivers don't inherit our lock which 499 * results in a lock order reversal between crypto_dispatch forced 500 * entry and the crypto_done callback into us. 501 */ 502 error = crypto_dispatch(crp); 503 mtx_lock(&cse->lock); 504 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 505 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 506 mtx_unlock(&cse->lock); 507 508 if (error != 0) 509 goto bail; 510 511 if (crp->crp_etype != 0) { 512 error = crp->crp_etype; 513 goto bail; 514 } 515 516 if (cse->error) { 517 error = cse->error; 518 goto bail; 519 } 520 521 if (cop->dst && 522 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 523 goto bail; 524 525 if (cop->mac && 526 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 527 cop->mac, cse->thash->hashsize))) 528 goto bail; 529 530bail: 531 if (crp) 532 crypto_freereq(crp); 533 if (cse->uio.uio_iov[0].iov_base) 534 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 535 536 return (error); 537} 538 539static int 540cryptodev_cb(void *op) 541{ 542 struct cryptop *crp = (struct cryptop *) op; 543 struct csession *cse = (struct csession *)crp->crp_opaque; 544 int error; 545 546 error = crp->crp_etype; 547 if (error == EAGAIN) 548 error = crypto_dispatch(crp); 549 mtx_lock(&cse->lock); 550 if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) { 551 cse->error = error; 552 wakeup_one(crp); 553 } 554 mtx_unlock(&cse->lock); 555 return (0); 556} 557 558static int 559cryptodevkey_cb(void *op) 560{ 561 struct cryptkop *krp = (struct cryptkop *) op; 562 563 wakeup_one(krp); 564 return (0); 565} 566 567static int 568cryptodev_key(struct crypt_kop *kop) 569{ 570 struct cryptkop *krp = NULL; 571 int error = EINVAL; 572 int in, out, size, i; 573 574 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 575 return (EFBIG); 576 } 577 578 in = kop->crk_iparams; 579 out = kop->crk_oparams; 580 switch (kop->crk_op) { 581 case CRK_MOD_EXP: 582 if (in == 3 && out == 1) 583 break; 584 return (EINVAL); 585 case CRK_MOD_EXP_CRT: 586 if (in == 6 && out == 1) 587 break; 588 return (EINVAL); 589 case CRK_DSA_SIGN: 590 if (in == 5 && out == 2) 591 break; 592 return (EINVAL); 593 case CRK_DSA_VERIFY: 594 if (in == 7 && out == 0) 595 break; 596 return (EINVAL); 597 case CRK_DH_COMPUTE_KEY: 598 if (in == 3 && out == 1) 599 break; 600 return (EINVAL); 601 default: 602 return (EINVAL); 603 } 604 605 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 606 if (!krp) 607 return (ENOMEM); 608 krp->krp_op = kop->crk_op; 609 krp->krp_status = kop->crk_status; 610 krp->krp_iparams = kop->crk_iparams; 611 krp->krp_oparams = kop->crk_oparams; 612 krp->krp_crid = kop->crk_crid; 613 krp->krp_status = 0; 614 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 615 616 for (i = 0; i < CRK_MAXPARAM; i++) { 617 if (kop->crk_param[i].crp_nbits > 65536) 618 /* Limit is the same as in OpenBSD */ 619 goto fail; 620 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 621 } 622 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 623 size = (krp->krp_param[i].crp_nbits + 7) / 8; 624 if (size == 0) 625 continue; 626 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 627 if (i >= krp->krp_iparams) 628 continue; 629 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 630 if (error) 631 goto fail; 632 } 633 634 error = crypto_kdispatch(krp); 635 if (error) 636 goto fail; 637 error = tsleep(krp, PSOCK, "crydev", 0); 638 if (error) { 639 /* XXX can this happen? if so, how do we recover? */ 640 goto fail; 641 } 642 643 kop->crk_crid = krp->krp_crid; /* device that did the work */ 644 if (krp->krp_status != 0) { 645 error = krp->krp_status; 646 goto fail; 647 } 648 649 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 650 size = (krp->krp_param[i].crp_nbits + 7) / 8; 651 if (size == 0) 652 continue; 653 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 654 if (error) 655 goto fail; 656 } 657 658fail: 659 if (krp) { 660 kop->crk_status = krp->krp_status; 661 for (i = 0; i < CRK_MAXPARAM; i++) { 662 if (krp->krp_param[i].crp_p) 663 free(krp->krp_param[i].crp_p, M_XDATA); 664 } 665 free(krp, M_XDATA); 666 } 667 return (error); 668} 669 670static int 671cryptodev_find(struct crypt_find_op *find) 672{ 673 device_t dev; 674 675 if (find->crid != -1) { 676 dev = crypto_find_device_byhid(find->crid); 677 if (dev == NULL) 678 return (ENOENT); 679 strlcpy(find->name, device_get_nameunit(dev), 680 sizeof(find->name)); 681 } else { 682 find->crid = crypto_find_driver(find->name); 683 if (find->crid == -1) 684 return (ENOENT); 685 } 686 return (0); 687} 688 689/* ARGSUSED */ 690static int 691cryptof_poll( 692 struct file *fp, 693 int events, 694 struct ucred *active_cred, 695 struct thread *td) 696{ 697 698 return (0); 699} 700 701/* ARGSUSED */ 702static int 703cryptof_kqfilter(struct file *fp, struct knote *kn) 704{ 705 706 return (0); 707} 708 709/* ARGSUSED */ 710static int 711cryptof_stat( 712 struct file *fp, 713 struct stat *sb, 714 struct ucred *active_cred, 715 struct thread *td) 716{ 717 718 return (EOPNOTSUPP); 719} 720 721/* ARGSUSED */ 722static int 723cryptof_close(struct file *fp, struct thread *td) 724{ 725 struct fcrypt *fcr = fp->f_data; 726 struct csession *cse; 727 728 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 729 TAILQ_REMOVE(&fcr->csessions, cse, next); 730 (void)csefree(cse); 731 } 732 free(fcr, M_XDATA); 733 fp->f_data = NULL; 734 return 0; 735} 736 737static struct csession * 738csefind(struct fcrypt *fcr, u_int ses) 739{ 740 struct csession *cse; 741 742 TAILQ_FOREACH(cse, &fcr->csessions, next) 743 if (cse->ses == ses) 744 return (cse); 745 return (NULL); 746} 747 748static int 749csedelete(struct fcrypt *fcr, struct csession *cse_del) 750{ 751 struct csession *cse; 752 753 TAILQ_FOREACH(cse, &fcr->csessions, next) { 754 if (cse == cse_del) { 755 TAILQ_REMOVE(&fcr->csessions, cse, next); 756 return (1); 757 } 758 } 759 return (0); 760} 761 762static struct csession * 763cseadd(struct fcrypt *fcr, struct csession *cse) 764{ 765 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 766 cse->ses = fcr->sesn++; 767 return (cse); 768} 769 770struct csession * 771csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 772 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 773 struct enc_xform *txform, struct auth_hash *thash) 774{ 775 struct csession *cse; 776 777#ifdef INVARIANTS 778 /* NB: required when mtx_init is built with INVARIANTS */ 779 cse = malloc(sizeof(struct csession), 780 M_XDATA, M_NOWAIT | M_ZERO); 781#else 782 cse = malloc(sizeof(struct csession), 783 M_XDATA, M_NOWAIT); 784#endif 785 if (cse == NULL) 786 return NULL; 787 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 788 cse->key = key; 789 cse->keylen = keylen/8; 790 cse->mackey = mackey; 791 cse->mackeylen = mackeylen/8; 792 cse->sid = sid; 793 cse->cipher = cipher; 794 cse->mac = mac; 795 cse->txform = txform; 796 cse->thash = thash; 797 cseadd(fcr, cse); 798 return (cse); 799} 800 801static int 802csefree(struct csession *cse) 803{ 804 int error; 805 806 error = crypto_freesession(cse->sid); 807 mtx_destroy(&cse->lock); 808 if (cse->key) 809 free(cse->key, M_XDATA); 810 if (cse->mackey) 811 free(cse->mackey, M_XDATA); 812 free(cse, M_XDATA); 813 return (error); 814} 815 816static int 817cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 818{ 819 return (0); 820} 821 822static int 823cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 824{ 825 return (EIO); 826} 827 828static int 829cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 830{ 831 return (EIO); 832} 833 834static int 835cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 836{ 837 struct file *f; 838 struct fcrypt *fcr; 839 int fd, error; 840 841 switch (cmd) { 842 case CRIOGET: 843 fcr = malloc( sizeof(struct fcrypt), M_XDATA, M_WAITOK); 844 TAILQ_INIT(&fcr->csessions); 845 fcr->sesn = 0; 846 847 error = falloc(td, &f, &fd); 848 849 if (error) { 850 free(fcr, M_XDATA); 851 return (error); 852 } 853 /* falloc automatically provides an extra reference to 'f'. */ 854 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops); 855 *(u_int32_t *)data = fd; 856 fdrop(f, td); 857 break; 858 case CRIOFINDDEV: 859 error = cryptodev_find((struct crypt_find_op *)data); 860 break; 861 case CRIOASYMFEAT: 862 error = crypto_getfeat((int *)data); 863 break; 864 default: 865 error = EINVAL; 866 break; 867 } 868 return (error); 869} 870 871static struct cdevsw crypto_cdevsw = { 872 .d_version = D_VERSION, 873 .d_flags = D_NEEDGIANT, 874 .d_open = cryptoopen, 875 .d_read = cryptoread, 876 .d_write = cryptowrite, 877 .d_ioctl = cryptoioctl, 878 .d_name = "crypto", 879}; 880static struct cdev *crypto_dev; 881 882/* 883 * Initialization code, both for static and dynamic loading. 884 */ 885static int 886cryptodev_modevent(module_t mod, int type, void *unused) 887{ 888 switch (type) { 889 case MOD_LOAD: 890 if (bootverbose) 891 printf("crypto: <crypto device>\n"); 892 crypto_dev = make_dev(&crypto_cdevsw, 0, 893 UID_ROOT, GID_WHEEL, 0666, 894 "crypto"); 895 return 0; 896 case MOD_UNLOAD: 897 /*XXX disallow if active sessions */ 898 destroy_dev(crypto_dev); 899 return 0; 900 } 901 return EINVAL; 902} 903 904static moduledata_t cryptodev_mod = { 905 "cryptodev", 906 cryptodev_modevent, 907 0 908}; 909MODULE_VERSION(cryptodev, 1); 910DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 911MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 912MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 913