cryptodev.c revision 168355
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 168355 2007-04-04 09:11:34Z rwatson $"); 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_ioctl(struct file *, u_long, void *, 90 struct ucred *, struct thread *); 91static int cryptof_poll(struct file *, int, struct ucred *, struct thread *); 92static int cryptof_kqfilter(struct file *, struct knote *); 93static int cryptof_stat(struct file *, struct stat *, 94 struct ucred *, struct thread *); 95static int cryptof_close(struct file *, struct thread *); 96 97static struct fileops cryptofops = { 98 .fo_read = cryptof_rw, 99 .fo_write = cryptof_rw, 100 .fo_ioctl = cryptof_ioctl, 101 .fo_poll = cryptof_poll, 102 .fo_kqfilter = cryptof_kqfilter, 103 .fo_stat = cryptof_stat, 104 .fo_close = cryptof_close 105}; 106 107static struct csession *csefind(struct fcrypt *, u_int); 108static int csedelete(struct fcrypt *, struct csession *); 109static struct csession *cseadd(struct fcrypt *, struct csession *); 110static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, 111 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 112 struct auth_hash *); 113static int csefree(struct csession *); 114 115static int cryptodev_op(struct csession *, struct crypt_op *, 116 struct ucred *, struct thread *td); 117static int cryptodev_key(struct crypt_kop *); 118static int cryptodev_find(struct crypt_find_op *); 119 120static int 121cryptof_rw( 122 struct file *fp, 123 struct uio *uio, 124 struct ucred *active_cred, 125 int flags, 126 struct thread *td) 127{ 128 129 return (EIO); 130} 131 132/* 133 * Check a crypto identifier to see if it requested 134 * a software device/driver. This can be done either 135 * by device name/class or through search constraints. 136 */ 137static int 138checkforsoftware(int crid) 139{ 140 if (crid & CRYPTOCAP_F_SOFTWARE) 141 return EINVAL; /* XXX */ 142 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 143 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 144 return EINVAL; /* XXX */ 145 return 0; 146} 147 148/* ARGSUSED */ 149static int 150cryptof_ioctl( 151 struct file *fp, 152 u_long cmd, 153 void *data, 154 struct ucred *active_cred, 155 struct thread *td) 156{ 157#define SES2(p) ((struct session2_op *)p) 158 struct cryptoini cria, crie; 159 struct fcrypt *fcr = fp->f_data; 160 struct csession *cse; 161 struct session_op *sop; 162 struct crypt_op *cop; 163 struct enc_xform *txform = NULL; 164 struct auth_hash *thash = NULL; 165 struct crypt_kop *kop; 166 u_int64_t sid; 167 u_int32_t ses; 168 int error = 0, crid; 169 170 switch (cmd) { 171 case CIOCGSESSION: 172 case CIOCGSESSION2: 173 sop = (struct session_op *)data; 174 switch (sop->cipher) { 175 case 0: 176 break; 177 case CRYPTO_DES_CBC: 178 txform = &enc_xform_des; 179 break; 180 case CRYPTO_3DES_CBC: 181 txform = &enc_xform_3des; 182 break; 183 case CRYPTO_BLF_CBC: 184 txform = &enc_xform_blf; 185 break; 186 case CRYPTO_CAST_CBC: 187 txform = &enc_xform_cast5; 188 break; 189 case CRYPTO_SKIPJACK_CBC: 190 txform = &enc_xform_skipjack; 191 break; 192 case CRYPTO_AES_CBC: 193 txform = &enc_xform_rijndael128; 194 break; 195 case CRYPTO_NULL_CBC: 196 txform = &enc_xform_null; 197 break; 198 case CRYPTO_ARC4: 199 txform = &enc_xform_arc4; 200 break; 201 default: 202 return (EINVAL); 203 } 204 205 switch (sop->mac) { 206 case 0: 207 break; 208 case CRYPTO_MD5_HMAC: 209 thash = &auth_hash_hmac_md5; 210 break; 211 case CRYPTO_SHA1_HMAC: 212 thash = &auth_hash_hmac_sha1; 213 break; 214 case CRYPTO_SHA2_256_HMAC: 215 thash = &auth_hash_hmac_sha2_256; 216 break; 217 case CRYPTO_SHA2_384_HMAC: 218 thash = &auth_hash_hmac_sha2_384; 219 break; 220 case CRYPTO_SHA2_512_HMAC: 221 thash = &auth_hash_hmac_sha2_512; 222 break; 223 case CRYPTO_RIPEMD160_HMAC: 224 thash = &auth_hash_hmac_ripemd_160; 225 break; 226#ifdef notdef 227 case CRYPTO_MD5: 228 thash = &auth_hash_md5; 229 break; 230 case CRYPTO_SHA1: 231 thash = &auth_hash_sha1; 232 break; 233#endif 234 case CRYPTO_NULL_HMAC: 235 thash = &auth_hash_null; 236 break; 237 default: 238 return (EINVAL); 239 } 240 241 bzero(&crie, sizeof(crie)); 242 bzero(&cria, sizeof(cria)); 243 244 if (txform) { 245 crie.cri_alg = txform->type; 246 crie.cri_klen = sop->keylen * 8; 247 if (sop->keylen > txform->maxkey || 248 sop->keylen < txform->minkey) { 249 error = EINVAL; 250 goto bail; 251 } 252 253 MALLOC(crie.cri_key, u_int8_t *, 254 crie.cri_klen / 8, M_XDATA, M_WAITOK); 255 if ((error = copyin(sop->key, crie.cri_key, 256 crie.cri_klen / 8))) 257 goto bail; 258 if (thash) 259 crie.cri_next = &cria; 260 } 261 262 if (thash) { 263 cria.cri_alg = thash->type; 264 cria.cri_klen = sop->mackeylen * 8; 265 if (sop->mackeylen != thash->keysize) { 266 error = EINVAL; 267 goto bail; 268 } 269 270 if (cria.cri_klen) { 271 MALLOC(cria.cri_key, u_int8_t *, 272 cria.cri_klen / 8, M_XDATA, M_WAITOK); 273 if ((error = copyin(sop->mackey, cria.cri_key, 274 cria.cri_klen / 8))) 275 goto bail; 276 } 277 } 278 279 /* NB: CIOGSESSION2 has the crid */ 280 if (cmd == CIOCGSESSION2) { 281 crid = SES2(sop)->crid; 282 error = checkforsoftware(crid); 283 if (error) 284 goto bail; 285 } else 286 crid = CRYPTOCAP_F_HARDWARE; 287 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 288 if (error) 289 goto bail; 290 291 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 292 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 293 thash); 294 295 if (cse == NULL) { 296 crypto_freesession(sid); 297 error = EINVAL; 298 goto bail; 299 } 300 sop->ses = cse->ses; 301 if (cmd == CIOCGSESSION2) { 302 /* return hardware/driver id */ 303 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 304 } 305bail: 306 if (error) { 307 if (crie.cri_key) 308 FREE(crie.cri_key, M_XDATA); 309 if (cria.cri_key) 310 FREE(cria.cri_key, M_XDATA); 311 } 312 break; 313 case CIOCFSESSION: 314 ses = *(u_int32_t *)data; 315 cse = csefind(fcr, ses); 316 if (cse == NULL) 317 return (EINVAL); 318 csedelete(fcr, cse); 319 error = csefree(cse); 320 break; 321 case CIOCCRYPT: 322 cop = (struct crypt_op *)data; 323 cse = csefind(fcr, cop->ses); 324 if (cse == NULL) 325 return (EINVAL); 326 error = cryptodev_op(cse, cop, active_cred, td); 327 break; 328 case CIOCKEY: 329 case CIOCKEY2: 330 if (!crypto_userasymcrypto) 331 return (EPERM); /* XXX compat? */ 332 mtx_lock(&Giant); 333 kop = (struct crypt_kop *)data; 334 if (cmd == CIOCKEY) { 335 /* NB: crypto core enforces s/w driver use */ 336 kop->crk_crid = 337 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 338 } 339 error = cryptodev_key(kop); 340 mtx_unlock(&Giant); 341 break; 342 case CIOCASYMFEAT: 343 if (!crypto_userasymcrypto) { 344 /* 345 * NB: if user asym crypto operations are 346 * not permitted return "no algorithms" 347 * so well-behaved applications will just 348 * fallback to doing them in software. 349 */ 350 *(int *)data = 0; 351 } else 352 error = crypto_getfeat((int *)data); 353 break; 354 case CIOCFINDDEV: 355 error = cryptodev_find((struct crypt_find_op *)data); 356 break; 357 default: 358 error = EINVAL; 359 break; 360 } 361 return (error); 362#undef SES2 363} 364 365static int cryptodev_cb(void *); 366 367 368static int 369cryptodev_op( 370 struct csession *cse, 371 struct crypt_op *cop, 372 struct ucred *active_cred, 373 struct thread *td) 374{ 375 struct cryptop *crp = NULL; 376 struct cryptodesc *crde = NULL, *crda = NULL; 377 int error; 378 379 if (cop->len > 256*1024-4) 380 return (E2BIG); 381 382 if (cse->txform) { 383 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 384 return (EINVAL); 385 } 386 387 cse->uio.uio_iov = &cse->iovec; 388 cse->uio.uio_iovcnt = 1; 389 cse->uio.uio_offset = 0; 390 cse->uio.uio_resid = cop->len; 391 cse->uio.uio_segflg = UIO_SYSSPACE; 392 cse->uio.uio_rw = UIO_WRITE; 393 cse->uio.uio_td = td; 394 cse->uio.uio_iov[0].iov_len = cop->len; 395 if (cse->thash) 396 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 397 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len, 398 M_XDATA, M_WAITOK); 399 400 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 401 if (crp == NULL) { 402 error = ENOMEM; 403 goto bail; 404 } 405 406 if (cse->thash) { 407 crda = crp->crp_desc; 408 if (cse->txform) 409 crde = crda->crd_next; 410 } else { 411 if (cse->txform) 412 crde = crp->crp_desc; 413 else { 414 error = EINVAL; 415 goto bail; 416 } 417 } 418 419 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 420 goto bail; 421 422 if (crda) { 423 crda->crd_skip = 0; 424 crda->crd_len = cop->len; 425 crda->crd_inject = cop->len; 426 427 crda->crd_alg = cse->mac; 428 crda->crd_key = cse->mackey; 429 crda->crd_klen = cse->mackeylen * 8; 430 } 431 432 if (crde) { 433 if (cop->op == COP_ENCRYPT) 434 crde->crd_flags |= CRD_F_ENCRYPT; 435 else 436 crde->crd_flags &= ~CRD_F_ENCRYPT; 437 crde->crd_len = cop->len; 438 crde->crd_inject = 0; 439 440 crde->crd_alg = cse->cipher; 441 crde->crd_key = cse->key; 442 crde->crd_klen = cse->keylen * 8; 443 } 444 445 crp->crp_ilen = cop->len; 446 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 447 | (cop->flags & COP_F_BATCH); 448 crp->crp_buf = (caddr_t)&cse->uio; 449 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 450 crp->crp_sid = cse->sid; 451 crp->crp_opaque = (void *)cse; 452 453 if (cop->iv) { 454 if (crde == NULL) { 455 error = EINVAL; 456 goto bail; 457 } 458 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 459 error = EINVAL; 460 goto bail; 461 } 462 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 463 goto bail; 464 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 465 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 466 crde->crd_skip = 0; 467 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 468 crde->crd_skip = 0; 469 } else if (crde) { 470 crde->crd_flags |= CRD_F_IV_PRESENT; 471 crde->crd_skip = cse->txform->blocksize; 472 crde->crd_len -= cse->txform->blocksize; 473 } 474 475 if (cop->mac && crda == NULL) { 476 error = EINVAL; 477 goto bail; 478 } 479 480 /* 481 * Let the dispatch run unlocked, then, interlock against the 482 * callback before checking if the operation completed and going 483 * to sleep. This insures drivers don't inherit our lock which 484 * results in a lock order reversal between crypto_dispatch forced 485 * entry and the crypto_done callback into us. 486 */ 487 error = crypto_dispatch(crp); 488 mtx_lock(&cse->lock); 489 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 490 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 491 mtx_unlock(&cse->lock); 492 493 if (error != 0) 494 goto bail; 495 496 if (crp->crp_etype != 0) { 497 error = crp->crp_etype; 498 goto bail; 499 } 500 501 if (cse->error) { 502 error = cse->error; 503 goto bail; 504 } 505 506 if (cop->dst && 507 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 508 goto bail; 509 510 if (cop->mac && 511 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 512 cop->mac, cse->thash->hashsize))) 513 goto bail; 514 515bail: 516 if (crp) 517 crypto_freereq(crp); 518 if (cse->uio.uio_iov[0].iov_base) 519 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 520 521 return (error); 522} 523 524static int 525cryptodev_cb(void *op) 526{ 527 struct cryptop *crp = (struct cryptop *) op; 528 struct csession *cse = (struct csession *)crp->crp_opaque; 529 int error; 530 531 error = crp->crp_etype; 532 if (error == EAGAIN) 533 error = crypto_dispatch(crp); 534 mtx_lock(&cse->lock); 535 if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) { 536 cse->error = error; 537 wakeup_one(crp); 538 } 539 mtx_unlock(&cse->lock); 540 return (0); 541} 542 543static int 544cryptodevkey_cb(void *op) 545{ 546 struct cryptkop *krp = (struct cryptkop *) op; 547 548 wakeup_one(krp); 549 return (0); 550} 551 552static int 553cryptodev_key(struct crypt_kop *kop) 554{ 555 struct cryptkop *krp = NULL; 556 int error = EINVAL; 557 int in, out, size, i; 558 559 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 560 return (EFBIG); 561 } 562 563 in = kop->crk_iparams; 564 out = kop->crk_oparams; 565 switch (kop->crk_op) { 566 case CRK_MOD_EXP: 567 if (in == 3 && out == 1) 568 break; 569 return (EINVAL); 570 case CRK_MOD_EXP_CRT: 571 if (in == 6 && out == 1) 572 break; 573 return (EINVAL); 574 case CRK_DSA_SIGN: 575 if (in == 5 && out == 2) 576 break; 577 return (EINVAL); 578 case CRK_DSA_VERIFY: 579 if (in == 7 && out == 0) 580 break; 581 return (EINVAL); 582 case CRK_DH_COMPUTE_KEY: 583 if (in == 3 && out == 1) 584 break; 585 return (EINVAL); 586 default: 587 return (EINVAL); 588 } 589 590 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 591 if (!krp) 592 return (ENOMEM); 593 bzero(krp, sizeof *krp); 594 krp->krp_op = kop->crk_op; 595 krp->krp_status = kop->crk_status; 596 krp->krp_iparams = kop->crk_iparams; 597 krp->krp_oparams = kop->crk_oparams; 598 krp->krp_crid = kop->crk_crid; 599 krp->krp_status = 0; 600 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 601 602 for (i = 0; i < CRK_MAXPARAM; i++) 603 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 604 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 605 size = (krp->krp_param[i].crp_nbits + 7) / 8; 606 if (size == 0) 607 continue; 608 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 609 if (i >= krp->krp_iparams) 610 continue; 611 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 612 if (error) 613 goto fail; 614 } 615 616 error = crypto_kdispatch(krp); 617 if (error) 618 goto fail; 619 error = tsleep(krp, PSOCK, "crydev", 0); 620 if (error) { 621 /* XXX can this happen? if so, how do we recover? */ 622 goto fail; 623 } 624 625 kop->crk_crid = krp->krp_crid; /* device that did the work */ 626 if (krp->krp_status != 0) { 627 error = krp->krp_status; 628 goto fail; 629 } 630 631 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 632 size = (krp->krp_param[i].crp_nbits + 7) / 8; 633 if (size == 0) 634 continue; 635 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 636 if (error) 637 goto fail; 638 } 639 640fail: 641 if (krp) { 642 kop->crk_status = krp->krp_status; 643 for (i = 0; i < CRK_MAXPARAM; i++) { 644 if (krp->krp_param[i].crp_p) 645 FREE(krp->krp_param[i].crp_p, M_XDATA); 646 } 647 free(krp, M_XDATA); 648 } 649 return (error); 650} 651 652static int 653cryptodev_find(struct crypt_find_op *find) 654{ 655 device_t dev; 656 657 if (find->crid != -1) { 658 dev = crypto_find_device_byhid(find->crid); 659 if (dev == NULL) 660 return (ENOENT); 661 strlcpy(find->name, device_get_nameunit(dev), 662 sizeof(find->name)); 663 } else { 664 find->crid = crypto_find_driver(find->name); 665 if (find->crid == -1) 666 return (ENOENT); 667 } 668 return (0); 669} 670 671/* ARGSUSED */ 672static int 673cryptof_poll( 674 struct file *fp, 675 int events, 676 struct ucred *active_cred, 677 struct thread *td) 678{ 679 680 return (0); 681} 682 683/* ARGSUSED */ 684static int 685cryptof_kqfilter(struct file *fp, struct knote *kn) 686{ 687 688 return (0); 689} 690 691/* ARGSUSED */ 692static int 693cryptof_stat( 694 struct file *fp, 695 struct stat *sb, 696 struct ucred *active_cred, 697 struct thread *td) 698{ 699 700 return (EOPNOTSUPP); 701} 702 703/* ARGSUSED */ 704static int 705cryptof_close(struct file *fp, struct thread *td) 706{ 707 struct fcrypt *fcr = fp->f_data; 708 struct csession *cse; 709 710 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 711 TAILQ_REMOVE(&fcr->csessions, cse, next); 712 (void)csefree(cse); 713 } 714 FREE(fcr, M_XDATA); 715 fp->f_data = NULL; 716 return 0; 717} 718 719static struct csession * 720csefind(struct fcrypt *fcr, u_int ses) 721{ 722 struct csession *cse; 723 724 TAILQ_FOREACH(cse, &fcr->csessions, next) 725 if (cse->ses == ses) 726 return (cse); 727 return (NULL); 728} 729 730static int 731csedelete(struct fcrypt *fcr, struct csession *cse_del) 732{ 733 struct csession *cse; 734 735 TAILQ_FOREACH(cse, &fcr->csessions, next) { 736 if (cse == cse_del) { 737 TAILQ_REMOVE(&fcr->csessions, cse, next); 738 return (1); 739 } 740 } 741 return (0); 742} 743 744static struct csession * 745cseadd(struct fcrypt *fcr, struct csession *cse) 746{ 747 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 748 cse->ses = fcr->sesn++; 749 return (cse); 750} 751 752struct csession * 753csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 754 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 755 struct enc_xform *txform, struct auth_hash *thash) 756{ 757 struct csession *cse; 758 759#ifdef INVARIANTS 760 /* NB: required when mtx_init is built with INVARIANTS */ 761 MALLOC(cse, struct csession *, sizeof(struct csession), 762 M_XDATA, M_NOWAIT | M_ZERO); 763#else 764 MALLOC(cse, struct csession *, sizeof(struct csession), 765 M_XDATA, M_NOWAIT); 766#endif 767 if (cse == NULL) 768 return NULL; 769 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 770 cse->key = key; 771 cse->keylen = keylen/8; 772 cse->mackey = mackey; 773 cse->mackeylen = mackeylen/8; 774 cse->sid = sid; 775 cse->cipher = cipher; 776 cse->mac = mac; 777 cse->txform = txform; 778 cse->thash = thash; 779 cseadd(fcr, cse); 780 return (cse); 781} 782 783static int 784csefree(struct csession *cse) 785{ 786 int error; 787 788 error = crypto_freesession(cse->sid); 789 mtx_destroy(&cse->lock); 790 if (cse->key) 791 FREE(cse->key, M_XDATA); 792 if (cse->mackey) 793 FREE(cse->mackey, M_XDATA); 794 FREE(cse, M_XDATA); 795 return (error); 796} 797 798static int 799cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 800{ 801 return (0); 802} 803 804static int 805cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 806{ 807 return (EIO); 808} 809 810static int 811cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 812{ 813 return (EIO); 814} 815 816static int 817cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 818{ 819 struct file *f; 820 struct fcrypt *fcr; 821 int fd, error; 822 823 switch (cmd) { 824 case CRIOGET: 825 MALLOC(fcr, struct fcrypt *, 826 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 827 TAILQ_INIT(&fcr->csessions); 828 fcr->sesn = 0; 829 830 error = falloc(td, &f, &fd); 831 832 if (error) { 833 FREE(fcr, M_XDATA); 834 return (error); 835 } 836 /* falloc automatically provides an extra reference to 'f'. */ 837 FILE_LOCK(f); 838 f->f_flag = FREAD | FWRITE; 839 f->f_type = DTYPE_CRYPTO; 840 f->f_data = fcr; 841 f->f_ops = &cryptofops; 842 FILE_UNLOCK(f); 843 *(u_int32_t *)data = fd; 844 fdrop(f, td); 845 break; 846 case CRIOFINDDEV: 847 error = cryptodev_find((struct crypt_find_op *)data); 848 break; 849 case CRIOASYMFEAT: 850 error = crypto_getfeat((int *)data); 851 break; 852 default: 853 error = EINVAL; 854 break; 855 } 856 return (error); 857} 858 859static struct cdevsw crypto_cdevsw = { 860 .d_version = D_VERSION, 861 .d_flags = D_NEEDGIANT, 862 .d_open = cryptoopen, 863 .d_read = cryptoread, 864 .d_write = cryptowrite, 865 .d_ioctl = cryptoioctl, 866 .d_name = "crypto", 867}; 868static struct cdev *crypto_dev; 869 870/* 871 * Initialization code, both for static and dynamic loading. 872 */ 873static int 874cryptodev_modevent(module_t mod, int type, void *unused) 875{ 876 switch (type) { 877 case MOD_LOAD: 878 if (bootverbose) 879 printf("crypto: <crypto device>\n"); 880 crypto_dev = make_dev(&crypto_cdevsw, 0, 881 UID_ROOT, GID_WHEEL, 0666, 882 "crypto"); 883 return 0; 884 case MOD_UNLOAD: 885 /*XXX disallow if active sessions */ 886 destroy_dev(crypto_dev); 887 return 0; 888 } 889 return EINVAL; 890} 891 892static moduledata_t cryptodev_mod = { 893 "cryptodev", 894 cryptodev_modevent, 895 0 896}; 897MODULE_VERSION(cryptodev, 1); 898DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 899MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 900MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 901