cryptodev.c revision 184214
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 184214 2008-10-23 20:26:15Z 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, 271 M_XDATA, M_WAITOK); 272 if ((error = copyin(sop->key, crie.cri_key, 273 crie.cri_klen / 8))) 274 goto bail; 275 if (thash) 276 crie.cri_next = &cria; 277 } 278 279 if (thash) { 280 cria.cri_alg = thash->type; 281 cria.cri_klen = sop->mackeylen * 8; 282 if (sop->mackeylen != thash->keysize) { 283 error = EINVAL; 284 goto bail; 285 } 286 287 if (cria.cri_klen) { 288 cria.cri_key = malloc(cria.cri_klen / 8, 289 M_XDATA, M_WAITOK); 290 if ((error = copyin(sop->mackey, cria.cri_key, 291 cria.cri_klen / 8))) 292 goto bail; 293 } 294 } 295 296 /* NB: CIOGSESSION2 has the crid */ 297 if (cmd == CIOCGSESSION2) { 298 crid = SES2(sop)->crid; 299 error = checkforsoftware(crid); 300 if (error) 301 goto bail; 302 } else 303 crid = CRYPTOCAP_F_HARDWARE; 304 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 305 if (error) 306 goto bail; 307 308 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 309 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 310 thash); 311 312 if (cse == NULL) { 313 crypto_freesession(sid); 314 error = EINVAL; 315 goto bail; 316 } 317 sop->ses = cse->ses; 318 if (cmd == CIOCGSESSION2) { 319 /* return hardware/driver id */ 320 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 321 } 322bail: 323 if (error) { 324 if (crie.cri_key) 325 free(crie.cri_key, M_XDATA); 326 if (cria.cri_key) 327 free(cria.cri_key, M_XDATA); 328 } 329 break; 330 case CIOCFSESSION: 331 ses = *(u_int32_t *)data; 332 cse = csefind(fcr, ses); 333 if (cse == NULL) 334 return (EINVAL); 335 csedelete(fcr, cse); 336 error = csefree(cse); 337 break; 338 case CIOCCRYPT: 339 cop = (struct crypt_op *)data; 340 cse = csefind(fcr, cop->ses); 341 if (cse == NULL) 342 return (EINVAL); 343 error = cryptodev_op(cse, cop, active_cred, td); 344 break; 345 case CIOCKEY: 346 case CIOCKEY2: 347 if (!crypto_userasymcrypto) 348 return (EPERM); /* XXX compat? */ 349 mtx_lock(&Giant); 350 kop = (struct crypt_kop *)data; 351 if (cmd == CIOCKEY) { 352 /* NB: crypto core enforces s/w driver use */ 353 kop->crk_crid = 354 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 355 } 356 error = cryptodev_key(kop); 357 mtx_unlock(&Giant); 358 break; 359 case CIOCASYMFEAT: 360 if (!crypto_userasymcrypto) { 361 /* 362 * NB: if user asym crypto operations are 363 * not permitted return "no algorithms" 364 * so well-behaved applications will just 365 * fallback to doing them in software. 366 */ 367 *(int *)data = 0; 368 } else 369 error = crypto_getfeat((int *)data); 370 break; 371 case CIOCFINDDEV: 372 error = cryptodev_find((struct crypt_find_op *)data); 373 break; 374 default: 375 error = EINVAL; 376 break; 377 } 378 return (error); 379#undef SES2 380} 381 382static int cryptodev_cb(void *); 383 384 385static int 386cryptodev_op( 387 struct csession *cse, 388 struct crypt_op *cop, 389 struct ucred *active_cred, 390 struct thread *td) 391{ 392 struct cryptop *crp = NULL; 393 struct cryptodesc *crde = NULL, *crda = NULL; 394 int error; 395 396 if (cop->len > 256*1024-4) 397 return (E2BIG); 398 399 if (cse->txform) { 400 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 401 return (EINVAL); 402 } 403 404 cse->uio.uio_iov = &cse->iovec; 405 cse->uio.uio_iovcnt = 1; 406 cse->uio.uio_offset = 0; 407 cse->uio.uio_resid = cop->len; 408 cse->uio.uio_segflg = UIO_SYSSPACE; 409 cse->uio.uio_rw = UIO_WRITE; 410 cse->uio.uio_td = td; 411 cse->uio.uio_iov[0].iov_len = cop->len; 412 if (cse->thash) 413 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 414 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len, 415 M_XDATA, M_WAITOK); 416 417 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 418 if (crp == NULL) { 419 error = ENOMEM; 420 goto bail; 421 } 422 423 if (cse->thash) { 424 crda = crp->crp_desc; 425 if (cse->txform) 426 crde = crda->crd_next; 427 } else { 428 if (cse->txform) 429 crde = crp->crp_desc; 430 else { 431 error = EINVAL; 432 goto bail; 433 } 434 } 435 436 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 437 goto bail; 438 439 if (crda) { 440 crda->crd_skip = 0; 441 crda->crd_len = cop->len; 442 crda->crd_inject = cop->len; 443 444 crda->crd_alg = cse->mac; 445 crda->crd_key = cse->mackey; 446 crda->crd_klen = cse->mackeylen * 8; 447 } 448 449 if (crde) { 450 if (cop->op == COP_ENCRYPT) 451 crde->crd_flags |= CRD_F_ENCRYPT; 452 else 453 crde->crd_flags &= ~CRD_F_ENCRYPT; 454 crde->crd_len = cop->len; 455 crde->crd_inject = 0; 456 457 crde->crd_alg = cse->cipher; 458 crde->crd_key = cse->key; 459 crde->crd_klen = cse->keylen * 8; 460 } 461 462 crp->crp_ilen = cop->len; 463 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 464 | (cop->flags & COP_F_BATCH); 465 crp->crp_buf = (caddr_t)&cse->uio; 466 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 467 crp->crp_sid = cse->sid; 468 crp->crp_opaque = (void *)cse; 469 470 if (cop->iv) { 471 if (crde == NULL) { 472 error = EINVAL; 473 goto bail; 474 } 475 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 476 error = EINVAL; 477 goto bail; 478 } 479 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 480 goto bail; 481 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 482 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 483 crde->crd_skip = 0; 484 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 485 crde->crd_skip = 0; 486 } else if (crde) { 487 crde->crd_flags |= CRD_F_IV_PRESENT; 488 crde->crd_skip = cse->txform->blocksize; 489 crde->crd_len -= cse->txform->blocksize; 490 } 491 492 if (cop->mac && crda == NULL) { 493 error = EINVAL; 494 goto bail; 495 } 496 497 /* 498 * Let the dispatch run unlocked, then, interlock against the 499 * callback before checking if the operation completed and going 500 * to sleep. This insures drivers don't inherit our lock which 501 * results in a lock order reversal between crypto_dispatch forced 502 * entry and the crypto_done callback into us. 503 */ 504 error = crypto_dispatch(crp); 505 mtx_lock(&cse->lock); 506 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 507 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 508 mtx_unlock(&cse->lock); 509 510 if (error != 0) 511 goto bail; 512 513 if (crp->crp_etype != 0) { 514 error = crp->crp_etype; 515 goto bail; 516 } 517 518 if (cse->error) { 519 error = cse->error; 520 goto bail; 521 } 522 523 if (cop->dst && 524 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 525 goto bail; 526 527 if (cop->mac && 528 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 529 cop->mac, cse->thash->hashsize))) 530 goto bail; 531 532bail: 533 if (crp) 534 crypto_freereq(crp); 535 if (cse->uio.uio_iov[0].iov_base) 536 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 537 538 return (error); 539} 540 541static int 542cryptodev_cb(void *op) 543{ 544 struct cryptop *crp = (struct cryptop *) op; 545 struct csession *cse = (struct csession *)crp->crp_opaque; 546 int error; 547 548 error = crp->crp_etype; 549 if (error == EAGAIN) 550 error = crypto_dispatch(crp); 551 mtx_lock(&cse->lock); 552 if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) { 553 cse->error = error; 554 wakeup_one(crp); 555 } 556 mtx_unlock(&cse->lock); 557 return (0); 558} 559 560static int 561cryptodevkey_cb(void *op) 562{ 563 struct cryptkop *krp = (struct cryptkop *) op; 564 565 wakeup_one(krp); 566 return (0); 567} 568 569static int 570cryptodev_key(struct crypt_kop *kop) 571{ 572 struct cryptkop *krp = NULL; 573 int error = EINVAL; 574 int in, out, size, i; 575 576 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 577 return (EFBIG); 578 } 579 580 in = kop->crk_iparams; 581 out = kop->crk_oparams; 582 switch (kop->crk_op) { 583 case CRK_MOD_EXP: 584 if (in == 3 && out == 1) 585 break; 586 return (EINVAL); 587 case CRK_MOD_EXP_CRT: 588 if (in == 6 && out == 1) 589 break; 590 return (EINVAL); 591 case CRK_DSA_SIGN: 592 if (in == 5 && out == 2) 593 break; 594 return (EINVAL); 595 case CRK_DSA_VERIFY: 596 if (in == 7 && out == 0) 597 break; 598 return (EINVAL); 599 case CRK_DH_COMPUTE_KEY: 600 if (in == 3 && out == 1) 601 break; 602 return (EINVAL); 603 default: 604 return (EINVAL); 605 } 606 607 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 608 if (!krp) 609 return (ENOMEM); 610 krp->krp_op = kop->crk_op; 611 krp->krp_status = kop->crk_status; 612 krp->krp_iparams = kop->crk_iparams; 613 krp->krp_oparams = kop->crk_oparams; 614 krp->krp_crid = kop->crk_crid; 615 krp->krp_status = 0; 616 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 617 618 for (i = 0; i < CRK_MAXPARAM; i++) { 619 if (kop->crk_param[i].crp_nbits > 65536) 620 /* Limit is the same as in OpenBSD */ 621 goto fail; 622 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 623 } 624 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 625 size = (krp->krp_param[i].crp_nbits + 7) / 8; 626 if (size == 0) 627 continue; 628 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 629 if (i >= krp->krp_iparams) 630 continue; 631 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 632 if (error) 633 goto fail; 634 } 635 636 error = crypto_kdispatch(krp); 637 if (error) 638 goto fail; 639 error = tsleep(krp, PSOCK, "crydev", 0); 640 if (error) { 641 /* XXX can this happen? if so, how do we recover? */ 642 goto fail; 643 } 644 645 kop->crk_crid = krp->krp_crid; /* device that did the work */ 646 if (krp->krp_status != 0) { 647 error = krp->krp_status; 648 goto fail; 649 } 650 651 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 652 size = (krp->krp_param[i].crp_nbits + 7) / 8; 653 if (size == 0) 654 continue; 655 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 656 if (error) 657 goto fail; 658 } 659 660fail: 661 if (krp) { 662 kop->crk_status = krp->krp_status; 663 for (i = 0; i < CRK_MAXPARAM; i++) { 664 if (krp->krp_param[i].crp_p) 665 free(krp->krp_param[i].crp_p, M_XDATA); 666 } 667 free(krp, M_XDATA); 668 } 669 return (error); 670} 671 672static int 673cryptodev_find(struct crypt_find_op *find) 674{ 675 device_t dev; 676 677 if (find->crid != -1) { 678 dev = crypto_find_device_byhid(find->crid); 679 if (dev == NULL) 680 return (ENOENT); 681 strlcpy(find->name, device_get_nameunit(dev), 682 sizeof(find->name)); 683 } else { 684 find->crid = crypto_find_driver(find->name); 685 if (find->crid == -1) 686 return (ENOENT); 687 } 688 return (0); 689} 690 691/* ARGSUSED */ 692static int 693cryptof_poll( 694 struct file *fp, 695 int events, 696 struct ucred *active_cred, 697 struct thread *td) 698{ 699 700 return (0); 701} 702 703/* ARGSUSED */ 704static int 705cryptof_kqfilter(struct file *fp, struct knote *kn) 706{ 707 708 return (0); 709} 710 711/* ARGSUSED */ 712static int 713cryptof_stat( 714 struct file *fp, 715 struct stat *sb, 716 struct ucred *active_cred, 717 struct thread *td) 718{ 719 720 return (EOPNOTSUPP); 721} 722 723/* ARGSUSED */ 724static int 725cryptof_close(struct file *fp, struct thread *td) 726{ 727 struct fcrypt *fcr = fp->f_data; 728 struct csession *cse; 729 730 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 731 TAILQ_REMOVE(&fcr->csessions, cse, next); 732 (void)csefree(cse); 733 } 734 free(fcr, M_XDATA); 735 fp->f_data = NULL; 736 return 0; 737} 738 739static struct csession * 740csefind(struct fcrypt *fcr, u_int ses) 741{ 742 struct csession *cse; 743 744 TAILQ_FOREACH(cse, &fcr->csessions, next) 745 if (cse->ses == ses) 746 return (cse); 747 return (NULL); 748} 749 750static int 751csedelete(struct fcrypt *fcr, struct csession *cse_del) 752{ 753 struct csession *cse; 754 755 TAILQ_FOREACH(cse, &fcr->csessions, next) { 756 if (cse == cse_del) { 757 TAILQ_REMOVE(&fcr->csessions, cse, next); 758 return (1); 759 } 760 } 761 return (0); 762} 763 764static struct csession * 765cseadd(struct fcrypt *fcr, struct csession *cse) 766{ 767 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 768 cse->ses = fcr->sesn++; 769 return (cse); 770} 771 772struct csession * 773csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 774 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 775 struct enc_xform *txform, struct auth_hash *thash) 776{ 777 struct csession *cse; 778 779#ifdef INVARIANTS 780 /* NB: required when mtx_init is built with INVARIANTS */ 781 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO); 782#else 783 cse = malloc(sizeof(struct csession), 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