cryptodev.c revision 192636
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 192636 2009-05-23 13:23:46Z raj $"); 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_resid += cse->thash->hashsize; 415 } 416 cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len, 417 M_XDATA, M_WAITOK); 418 419 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 420 if (crp == NULL) { 421 error = ENOMEM; 422 goto bail; 423 } 424 425 if (cse->thash) { 426 crda = crp->crp_desc; 427 if (cse->txform) 428 crde = crda->crd_next; 429 } else { 430 if (cse->txform) 431 crde = crp->crp_desc; 432 else { 433 error = EINVAL; 434 goto bail; 435 } 436 } 437 438 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 439 goto bail; 440 441 if (crda) { 442 crda->crd_skip = 0; 443 crda->crd_len = cop->len; 444 crda->crd_inject = cop->len; 445 446 crda->crd_alg = cse->mac; 447 crda->crd_key = cse->mackey; 448 crda->crd_klen = cse->mackeylen * 8; 449 } 450 451 if (crde) { 452 if (cop->op == COP_ENCRYPT) 453 crde->crd_flags |= CRD_F_ENCRYPT; 454 else 455 crde->crd_flags &= ~CRD_F_ENCRYPT; 456 crde->crd_len = cop->len; 457 crde->crd_inject = 0; 458 459 crde->crd_alg = cse->cipher; 460 crde->crd_key = cse->key; 461 crde->crd_klen = cse->keylen * 8; 462 } 463 464 crp->crp_ilen = cop->len; 465 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 466 | (cop->flags & COP_F_BATCH); 467 crp->crp_buf = (caddr_t)&cse->uio; 468 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 469 crp->crp_sid = cse->sid; 470 crp->crp_opaque = (void *)cse; 471 472 if (cop->iv) { 473 if (crde == NULL) { 474 error = EINVAL; 475 goto bail; 476 } 477 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 478 error = EINVAL; 479 goto bail; 480 } 481 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 482 goto bail; 483 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 484 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 485 crde->crd_skip = 0; 486 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 487 crde->crd_skip = 0; 488 } else if (crde) { 489 crde->crd_flags |= CRD_F_IV_PRESENT; 490 crde->crd_skip = cse->txform->blocksize; 491 crde->crd_len -= cse->txform->blocksize; 492 } 493 494 if (cop->mac && crda == NULL) { 495 error = EINVAL; 496 goto bail; 497 } 498 499 /* 500 * Let the dispatch run unlocked, then, interlock against the 501 * callback before checking if the operation completed and going 502 * to sleep. This insures drivers don't inherit our lock which 503 * results in a lock order reversal between crypto_dispatch forced 504 * entry and the crypto_done callback into us. 505 */ 506 error = crypto_dispatch(crp); 507 mtx_lock(&cse->lock); 508 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 509 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0); 510 mtx_unlock(&cse->lock); 511 512 if (error != 0) 513 goto bail; 514 515 if (crp->crp_etype != 0) { 516 error = crp->crp_etype; 517 goto bail; 518 } 519 520 if (cse->error) { 521 error = cse->error; 522 goto bail; 523 } 524 525 if (cop->dst && 526 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 527 goto bail; 528 529 if (cop->mac && 530 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 531 cop->mac, cse->thash->hashsize))) 532 goto bail; 533 534bail: 535 if (crp) 536 crypto_freereq(crp); 537 if (cse->uio.uio_iov[0].iov_base) 538 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 539 540 return (error); 541} 542 543static int 544cryptodev_cb(void *op) 545{ 546 struct cryptop *crp = (struct cryptop *) op; 547 struct csession *cse = (struct csession *)crp->crp_opaque; 548 int error; 549 550 error = crp->crp_etype; 551 if (error == EAGAIN) 552 error = crypto_dispatch(crp); 553 mtx_lock(&cse->lock); 554 if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) { 555 cse->error = error; 556 wakeup_one(crp); 557 } 558 mtx_unlock(&cse->lock); 559 return (0); 560} 561 562static int 563cryptodevkey_cb(void *op) 564{ 565 struct cryptkop *krp = (struct cryptkop *) op; 566 567 wakeup_one(krp); 568 return (0); 569} 570 571static int 572cryptodev_key(struct crypt_kop *kop) 573{ 574 struct cryptkop *krp = NULL; 575 int error = EINVAL; 576 int in, out, size, i; 577 578 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 579 return (EFBIG); 580 } 581 582 in = kop->crk_iparams; 583 out = kop->crk_oparams; 584 switch (kop->crk_op) { 585 case CRK_MOD_EXP: 586 if (in == 3 && out == 1) 587 break; 588 return (EINVAL); 589 case CRK_MOD_EXP_CRT: 590 if (in == 6 && out == 1) 591 break; 592 return (EINVAL); 593 case CRK_DSA_SIGN: 594 if (in == 5 && out == 2) 595 break; 596 return (EINVAL); 597 case CRK_DSA_VERIFY: 598 if (in == 7 && out == 0) 599 break; 600 return (EINVAL); 601 case CRK_DH_COMPUTE_KEY: 602 if (in == 3 && out == 1) 603 break; 604 return (EINVAL); 605 default: 606 return (EINVAL); 607 } 608 609 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 610 if (!krp) 611 return (ENOMEM); 612 krp->krp_op = kop->crk_op; 613 krp->krp_status = kop->crk_status; 614 krp->krp_iparams = kop->crk_iparams; 615 krp->krp_oparams = kop->crk_oparams; 616 krp->krp_crid = kop->crk_crid; 617 krp->krp_status = 0; 618 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 619 620 for (i = 0; i < CRK_MAXPARAM; i++) { 621 if (kop->crk_param[i].crp_nbits > 65536) 622 /* Limit is the same as in OpenBSD */ 623 goto fail; 624 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 625 } 626 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 627 size = (krp->krp_param[i].crp_nbits + 7) / 8; 628 if (size == 0) 629 continue; 630 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 631 if (i >= krp->krp_iparams) 632 continue; 633 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 634 if (error) 635 goto fail; 636 } 637 638 error = crypto_kdispatch(krp); 639 if (error) 640 goto fail; 641 error = tsleep(krp, PSOCK, "crydev", 0); 642 if (error) { 643 /* XXX can this happen? if so, how do we recover? */ 644 goto fail; 645 } 646 647 kop->crk_crid = krp->krp_crid; /* device that did the work */ 648 if (krp->krp_status != 0) { 649 error = krp->krp_status; 650 goto fail; 651 } 652 653 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 654 size = (krp->krp_param[i].crp_nbits + 7) / 8; 655 if (size == 0) 656 continue; 657 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 658 if (error) 659 goto fail; 660 } 661 662fail: 663 if (krp) { 664 kop->crk_status = krp->krp_status; 665 for (i = 0; i < CRK_MAXPARAM; i++) { 666 if (krp->krp_param[i].crp_p) 667 free(krp->krp_param[i].crp_p, M_XDATA); 668 } 669 free(krp, M_XDATA); 670 } 671 return (error); 672} 673 674static int 675cryptodev_find(struct crypt_find_op *find) 676{ 677 device_t dev; 678 679 if (find->crid != -1) { 680 dev = crypto_find_device_byhid(find->crid); 681 if (dev == NULL) 682 return (ENOENT); 683 strlcpy(find->name, device_get_nameunit(dev), 684 sizeof(find->name)); 685 } else { 686 find->crid = crypto_find_driver(find->name); 687 if (find->crid == -1) 688 return (ENOENT); 689 } 690 return (0); 691} 692 693/* ARGSUSED */ 694static int 695cryptof_poll( 696 struct file *fp, 697 int events, 698 struct ucred *active_cred, 699 struct thread *td) 700{ 701 702 return (0); 703} 704 705/* ARGSUSED */ 706static int 707cryptof_kqfilter(struct file *fp, struct knote *kn) 708{ 709 710 return (0); 711} 712 713/* ARGSUSED */ 714static int 715cryptof_stat( 716 struct file *fp, 717 struct stat *sb, 718 struct ucred *active_cred, 719 struct thread *td) 720{ 721 722 return (EOPNOTSUPP); 723} 724 725/* ARGSUSED */ 726static int 727cryptof_close(struct file *fp, struct thread *td) 728{ 729 struct fcrypt *fcr = fp->f_data; 730 struct csession *cse; 731 732 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 733 TAILQ_REMOVE(&fcr->csessions, cse, next); 734 (void)csefree(cse); 735 } 736 free(fcr, M_XDATA); 737 fp->f_data = NULL; 738 return 0; 739} 740 741static struct csession * 742csefind(struct fcrypt *fcr, u_int ses) 743{ 744 struct csession *cse; 745 746 TAILQ_FOREACH(cse, &fcr->csessions, next) 747 if (cse->ses == ses) 748 return (cse); 749 return (NULL); 750} 751 752static int 753csedelete(struct fcrypt *fcr, struct csession *cse_del) 754{ 755 struct csession *cse; 756 757 TAILQ_FOREACH(cse, &fcr->csessions, next) { 758 if (cse == cse_del) { 759 TAILQ_REMOVE(&fcr->csessions, cse, next); 760 return (1); 761 } 762 } 763 return (0); 764} 765 766static struct csession * 767cseadd(struct fcrypt *fcr, struct csession *cse) 768{ 769 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 770 cse->ses = fcr->sesn++; 771 return (cse); 772} 773 774struct csession * 775csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 776 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 777 struct enc_xform *txform, struct auth_hash *thash) 778{ 779 struct csession *cse; 780 781#ifdef INVARIANTS 782 /* NB: required when mtx_init is built with INVARIANTS */ 783 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO); 784#else 785 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT); 786#endif 787 if (cse == NULL) 788 return NULL; 789 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 790 cse->key = key; 791 cse->keylen = keylen/8; 792 cse->mackey = mackey; 793 cse->mackeylen = mackeylen/8; 794 cse->sid = sid; 795 cse->cipher = cipher; 796 cse->mac = mac; 797 cse->txform = txform; 798 cse->thash = thash; 799 cseadd(fcr, cse); 800 return (cse); 801} 802 803static int 804csefree(struct csession *cse) 805{ 806 int error; 807 808 error = crypto_freesession(cse->sid); 809 mtx_destroy(&cse->lock); 810 if (cse->key) 811 free(cse->key, M_XDATA); 812 if (cse->mackey) 813 free(cse->mackey, M_XDATA); 814 free(cse, M_XDATA); 815 return (error); 816} 817 818static int 819cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 820{ 821 return (0); 822} 823 824static int 825cryptoread(struct cdev *dev, struct uio *uio, int ioflag) 826{ 827 return (EIO); 828} 829 830static int 831cryptowrite(struct cdev *dev, struct uio *uio, int ioflag) 832{ 833 return (EIO); 834} 835 836static int 837cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 838{ 839 struct file *f; 840 struct fcrypt *fcr; 841 int fd, error; 842 843 switch (cmd) { 844 case CRIOGET: 845 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK); 846 TAILQ_INIT(&fcr->csessions); 847 fcr->sesn = 0; 848 849 error = falloc(td, &f, &fd); 850 851 if (error) { 852 free(fcr, M_XDATA); 853 return (error); 854 } 855 /* falloc automatically provides an extra reference to 'f'. */ 856 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops); 857 *(u_int32_t *)data = fd; 858 fdrop(f, td); 859 break; 860 case CRIOFINDDEV: 861 error = cryptodev_find((struct crypt_find_op *)data); 862 break; 863 case CRIOASYMFEAT: 864 error = crypto_getfeat((int *)data); 865 break; 866 default: 867 error = EINVAL; 868 break; 869 } 870 return (error); 871} 872 873static struct cdevsw crypto_cdevsw = { 874 .d_version = D_VERSION, 875 .d_flags = D_NEEDGIANT, 876 .d_open = cryptoopen, 877 .d_read = cryptoread, 878 .d_write = cryptowrite, 879 .d_ioctl = cryptoioctl, 880 .d_name = "crypto", 881}; 882static struct cdev *crypto_dev; 883 884/* 885 * Initialization code, both for static and dynamic loading. 886 */ 887static int 888cryptodev_modevent(module_t mod, int type, void *unused) 889{ 890 switch (type) { 891 case MOD_LOAD: 892 if (bootverbose) 893 printf("crypto: <crypto device>\n"); 894 crypto_dev = make_dev(&crypto_cdevsw, 0, 895 UID_ROOT, GID_WHEEL, 0666, 896 "crypto"); 897 return 0; 898 case MOD_UNLOAD: 899 /*XXX disallow if active sessions */ 900 destroy_dev(crypto_dev); 901 return 0; 902 } 903 return EINVAL; 904} 905 906static moduledata_t cryptodev_mod = { 907 "cryptodev", 908 cryptodev_modevent, 909 0 910}; 911MODULE_VERSION(cryptodev, 1); 912DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 913MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 914MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 915