1 /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.41 2009/09/04 09:48:18 pjd Exp $ */ 2 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */ 3 4 /*- 5 * Copyright (c) 2001 Theo de Raadt 6 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * Effort sponsored in part by the Defense Advanced Research Projects 32 * Agency (DARPA) and Air Force Research Laboratory, Air Force 33 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 34 */ 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/malloc.h> 39 #include <sys/device.h> 40 #include <sys/mbuf.h> 41 #include <sys/lock.h> 42 #include <sys/sysctl.h> 43 #include <sys/file.h> 44 #include <sys/filedesc.h> 45 #include <sys/errno.h> 46 #include <sys/uio.h> 47 #include <sys/random.h> 48 #include <sys/conf.h> 49 #include <sys/module.h> 50 #include <sys/kernel.h> 51 #include <sys/fcntl.h> 52 #include <sys/proc.h> 53 54 #include <sys/file2.h> 55 #include <sys/thread2.h> 56 #include <sys/mplock2.h> 57 58 #include <opencrypto/cryptodev.h> 59 #include <opencrypto/xform.h> 60 61 struct csession { 62 TAILQ_ENTRY(csession) next; 63 u_int64_t sid; 64 u_int32_t ses; 65 struct lock lock; 66 67 u_int32_t cipher; 68 struct enc_xform *txform; 69 u_int32_t mac; 70 struct auth_hash *thash; 71 72 caddr_t key; 73 int keylen; 74 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 75 76 caddr_t mackey; 77 int mackeylen; 78 79 struct iovec iovec; 80 struct uio uio; 81 int error; 82 }; 83 84 struct fcrypt { 85 TAILQ_HEAD(csessionlist, csession) csessions; 86 int sesn; 87 }; 88 89 static int cryptof_rw(struct file *fp, struct uio *uio, 90 struct ucred *cred, int flags); 91 static int cryptof_ioctl(struct file *, u_long, caddr_t, 92 struct ucred *, struct sysmsg *); 93 static int cryptof_poll(struct file *, int, struct ucred *); 94 static int cryptof_kqfilter(struct file *, struct knote *); 95 static int cryptof_stat(struct file *, struct stat *, struct ucred *); 96 static int cryptof_close(struct file *); 97 98 static struct fileops cryptofops = { 99 .fo_read = cryptof_rw, 100 .fo_write = cryptof_rw, 101 .fo_ioctl = cryptof_ioctl, 102 .fo_poll = cryptof_poll, 103 .fo_kqfilter = cryptof_kqfilter, 104 .fo_stat = cryptof_stat, 105 .fo_close = cryptof_close, 106 .fo_shutdown = nofo_shutdown 107 }; 108 109 static struct csession *csefind(struct fcrypt *, u_int); 110 static int csedelete(struct fcrypt *, struct csession *); 111 static struct csession *cseadd(struct fcrypt *, struct csession *); 112 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, 113 u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 114 struct auth_hash *); 115 static int csefree(struct csession *); 116 117 static int cryptodev_op(struct csession *, struct crypt_op *, struct ucred *); 118 static int cryptodev_key(struct crypt_kop *); 119 static int cryptodev_find(struct crypt_find_op *); 120 121 static int 122 cryptof_rw( 123 struct file *fp, 124 struct uio *uio, 125 struct ucred *active_cred, 126 int flags) 127 { 128 return (EIO); 129 } 130 131 /* 132 * Check a crypto identifier to see if it requested 133 * a software device/driver. This can be done either 134 * by device name/class or through search constraints. 135 */ 136 static int 137 checkforsoftware(int crid) 138 { 139 if (crid & CRYPTOCAP_F_SOFTWARE) 140 return EINVAL; /* XXX */ 141 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 142 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 143 return EINVAL; /* XXX */ 144 return 0; 145 } 146 147 /* ARGSUSED */ 148 static int 149 cryptof_ioctl(struct file *fp, u_long cmd, caddr_t data, 150 struct ucred *cred, struct sysmsg *msg) 151 { 152 #define SES2(p) ((struct session2_op *)p) 153 struct cryptoini cria, crie; 154 struct fcrypt *fcr = fp->f_data; 155 struct csession *cse; 156 struct session_op *sop; 157 struct crypt_op *cop; 158 struct enc_xform *txform = NULL; 159 struct auth_hash *thash = NULL; 160 struct crypt_kop *kop; 161 u_int64_t sid; 162 u_int32_t ses; 163 int error = 0, crid; 164 165 switch (cmd) { 166 case CIOCGSESSION: 167 case CIOCGSESSION2: 168 sop = (struct session_op *)data; 169 switch (sop->cipher) { 170 case 0: 171 break; 172 case CRYPTO_DES_CBC: 173 txform = &enc_xform_des; 174 break; 175 case CRYPTO_3DES_CBC: 176 txform = &enc_xform_3des; 177 break; 178 case CRYPTO_BLF_CBC: 179 txform = &enc_xform_blf; 180 break; 181 case CRYPTO_CAST_CBC: 182 txform = &enc_xform_cast5; 183 break; 184 case CRYPTO_SKIPJACK_CBC: 185 txform = &enc_xform_skipjack; 186 break; 187 case CRYPTO_AES_CBC: 188 txform = &enc_xform_rijndael128; 189 break; 190 case CRYPTO_NULL_CBC: 191 txform = &enc_xform_null; 192 break; 193 case CRYPTO_ARC4: 194 txform = &enc_xform_arc4; 195 break; 196 case CRYPTO_CAMELLIA_CBC: 197 txform = &enc_xform_camellia; 198 break; 199 default: 200 return (EINVAL); 201 } 202 203 switch (sop->mac) { 204 case 0: 205 break; 206 case CRYPTO_MD5_HMAC: 207 thash = &auth_hash_hmac_md5; 208 break; 209 case CRYPTO_SHA1_HMAC: 210 thash = &auth_hash_hmac_sha1; 211 break; 212 case CRYPTO_SHA2_256_HMAC: 213 thash = &auth_hash_hmac_sha2_256; 214 break; 215 case CRYPTO_SHA2_384_HMAC: 216 thash = &auth_hash_hmac_sha2_384; 217 break; 218 case CRYPTO_SHA2_512_HMAC: 219 thash = &auth_hash_hmac_sha2_512; 220 break; 221 case CRYPTO_RIPEMD160_HMAC: 222 thash = &auth_hash_hmac_ripemd_160; 223 break; 224 #ifdef notdef 225 case CRYPTO_MD5: 226 thash = &auth_hash_md5; 227 break; 228 case CRYPTO_SHA1: 229 thash = &auth_hash_sha1; 230 break; 231 #endif 232 case CRYPTO_NULL_HMAC: 233 thash = &auth_hash_null; 234 break; 235 default: 236 return (EINVAL); 237 } 238 239 bzero(&crie, sizeof(crie)); 240 bzero(&cria, sizeof(cria)); 241 242 if (txform) { 243 crie.cri_alg = txform->type; 244 crie.cri_klen = sop->keylen * 8; 245 if (sop->keylen > txform->maxkey || 246 sop->keylen < txform->minkey) { 247 error = EINVAL; 248 goto bail; 249 } 250 251 crie.cri_key = kmalloc(crie.cri_klen / 8, 252 M_XDATA, M_WAITOK); 253 if ((error = copyin(sop->key, crie.cri_key, 254 crie.cri_klen / 8))) 255 goto bail; 256 if (thash) 257 crie.cri_next = &cria; 258 } 259 260 if (thash) { 261 cria.cri_alg = thash->type; 262 cria.cri_klen = sop->mackeylen * 8; 263 if (sop->mackeylen != thash->keysize) { 264 error = EINVAL; 265 goto bail; 266 } 267 268 if (cria.cri_klen) { 269 cria.cri_key = kmalloc(cria.cri_klen / 8, 270 M_XDATA, M_WAITOK); 271 if ((error = copyin(sop->mackey, cria.cri_key, 272 cria.cri_klen / 8))) 273 goto bail; 274 } 275 } 276 277 /* NB: CIOGSESSION2 has the crid */ 278 if (cmd == CIOCGSESSION2) { 279 crid = SES2(sop)->crid; 280 error = checkforsoftware(crid); 281 if (error) 282 goto bail; 283 } else 284 crid = CRYPTOCAP_F_HARDWARE; 285 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 286 if (error) 287 goto bail; 288 289 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 290 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 291 thash); 292 293 if (cse == NULL) { 294 crypto_freesession(sid); 295 error = EINVAL; 296 goto bail; 297 } 298 sop->ses = cse->ses; 299 if (cmd == CIOCGSESSION2) { 300 /* return hardware/driver id */ 301 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 302 } 303 bail: 304 if (error) { 305 if (crie.cri_key) 306 kfree(crie.cri_key, M_XDATA); 307 if (cria.cri_key) 308 kfree(cria.cri_key, M_XDATA); 309 } 310 break; 311 case CIOCFSESSION: 312 ses = *(u_int32_t *)data; 313 cse = csefind(fcr, ses); 314 if (cse == NULL) 315 return (EINVAL); 316 csedelete(fcr, cse); 317 error = csefree(cse); 318 break; 319 case CIOCCRYPT: 320 cop = (struct crypt_op *)data; 321 cse = csefind(fcr, cop->ses); 322 if (cse == NULL) 323 return (EINVAL); 324 error = cryptodev_op(cse, cop, cred); 325 break; 326 case CIOCKEY: 327 case CIOCKEY2: 328 if (!crypto_userasymcrypto) 329 return (EPERM); /* XXX compat? */ 330 get_mplock(); 331 kop = (struct crypt_kop *)data; 332 if (cmd == CIOCKEY) { 333 /* NB: crypto core enforces s/w driver use */ 334 kop->crk_crid = 335 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 336 } 337 error = cryptodev_key(kop); 338 rel_mplock(); 339 break; 340 case CIOCASYMFEAT: 341 if (!crypto_userasymcrypto) { 342 /* 343 * NB: if user asym crypto operations are 344 * not permitted return "no algorithms" 345 * so well-behaved applications will just 346 * fallback to doing them in software. 347 */ 348 *(int *)data = 0; 349 } else 350 error = crypto_getfeat((int *)data); 351 break; 352 case CIOCFINDDEV: 353 error = cryptodev_find((struct crypt_find_op *)data); 354 break; 355 default: 356 error = EINVAL; 357 break; 358 } 359 return (error); 360 #undef SES2 361 } 362 363 static int cryptodev_cb(void *); 364 365 366 static int 367 cryptodev_op(struct csession *cse, struct crypt_op *cop, 368 struct ucred *active_cred) 369 { 370 struct cryptop *crp = NULL; 371 struct cryptodesc *crde = NULL, *crda = NULL; 372 int error; 373 374 if (cop->len > 256*1024-4) 375 return (E2BIG); 376 377 if (cse->txform) { 378 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 379 return (EINVAL); 380 } 381 382 bzero(&cse->uio, sizeof(cse->uio)); 383 cse->uio.uio_iov = &cse->iovec; 384 cse->uio.uio_iovcnt = 1; 385 cse->uio.uio_offset = 0; 386 cse->uio.uio_resid = cop->len; 387 cse->uio.uio_segflg = UIO_SYSSPACE; 388 cse->uio.uio_rw = UIO_WRITE; 389 /* XXX: not sure, was td, now curthread? */ 390 cse->uio.uio_td = curthread; 391 cse->uio.uio_iov[0].iov_len = cop->len; 392 if (cse->thash) { 393 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 394 cse->uio.uio_resid += cse->thash->hashsize; 395 } 396 cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len, 397 M_XDATA, M_WAITOK); 398 399 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 400 if (crp == NULL) { 401 error = ENOMEM; 402 goto bail; 403 } 404 405 if (cse->thash) { 406 crda = crp->crp_desc; 407 if (cse->txform) 408 crde = crda->crd_next; 409 } else { 410 if (cse->txform) 411 crde = crp->crp_desc; 412 else { 413 error = EINVAL; 414 goto bail; 415 } 416 } 417 418 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 419 goto bail; 420 421 if (crda) { 422 crda->crd_skip = 0; 423 crda->crd_len = cop->len; 424 crda->crd_inject = cop->len; 425 426 crda->crd_alg = cse->mac; 427 crda->crd_key = cse->mackey; 428 crda->crd_klen = cse->mackeylen * 8; 429 } 430 431 if (crde) { 432 if (cop->op == COP_ENCRYPT) 433 crde->crd_flags |= CRD_F_ENCRYPT; 434 else 435 crde->crd_flags &= ~CRD_F_ENCRYPT; 436 crde->crd_len = cop->len; 437 crde->crd_inject = 0; 438 439 crde->crd_alg = cse->cipher; 440 crde->crd_key = cse->key; 441 crde->crd_klen = cse->keylen * 8; 442 } 443 444 crp->crp_ilen = cop->len; 445 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 446 | (cop->flags & COP_F_BATCH); 447 crp->crp_buf = (caddr_t)&cse->uio; 448 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 449 crp->crp_sid = cse->sid; 450 crp->crp_opaque = (void *)cse; 451 452 if (cop->iv) { 453 if (crde == NULL) { 454 error = EINVAL; 455 goto bail; 456 } 457 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 458 error = EINVAL; 459 goto bail; 460 } 461 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 462 goto bail; 463 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 464 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 465 crde->crd_skip = 0; 466 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 467 crde->crd_skip = 0; 468 } else if (crde) { 469 crde->crd_flags |= CRD_F_IV_PRESENT; 470 crde->crd_skip = cse->txform->blocksize; 471 crde->crd_len -= cse->txform->blocksize; 472 } 473 474 if (cop->mac && crda == NULL) { 475 error = EINVAL; 476 goto bail; 477 } 478 479 again: 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 lockmgr(&cse->lock, LK_EXCLUSIVE); 489 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 490 error = lksleep(crp, &cse->lock, 0, "crydev", 0); 491 lockmgr(&cse->lock, LK_RELEASE); 492 493 if (error != 0) 494 goto bail; 495 496 if (crp->crp_etype == EAGAIN) { 497 crp->crp_etype = 0; 498 crp->crp_flags &= ~CRYPTO_F_DONE; 499 goto again; 500 } 501 502 if (crp->crp_etype != 0) { 503 error = crp->crp_etype; 504 goto bail; 505 } 506 507 if (cse->error) { 508 error = cse->error; 509 goto bail; 510 } 511 512 if (cop->dst && 513 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 514 goto bail; 515 516 if (cop->mac && 517 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 518 cop->mac, cse->thash->hashsize))) 519 goto bail; 520 521 bail: 522 if (crp) 523 crypto_freereq(crp); 524 if (cse->uio.uio_iov[0].iov_base) 525 kfree(cse->uio.uio_iov[0].iov_base, M_XDATA); 526 527 return (error); 528 } 529 530 static int 531 cryptodev_cb(void *op) 532 { 533 struct cryptop *crp = (struct cryptop *) op; 534 struct csession *cse = (struct csession *)crp->crp_opaque; 535 536 lockmgr(&cse->lock, LK_EXCLUSIVE); 537 cse->error = crp->crp_etype; 538 wakeup_one(crp); 539 lockmgr(&cse->lock, LK_RELEASE); 540 return (0); 541 } 542 543 static int 544 cryptodevkey_cb(void *op) 545 { 546 struct cryptkop *krp = (struct cryptkop *) op; 547 548 wakeup_one(krp); 549 return (0); 550 } 551 552 static int 553 cryptodev_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 *)kmalloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO); 591 krp->krp_op = kop->crk_op; 592 krp->krp_status = kop->crk_status; 593 krp->krp_iparams = kop->crk_iparams; 594 krp->krp_oparams = kop->crk_oparams; 595 krp->krp_crid = kop->crk_crid; 596 krp->krp_status = 0; 597 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 598 599 for (i = 0; i < CRK_MAXPARAM; i++) { 600 if (kop->crk_param[i].crp_nbits > 65536) 601 /* Limit is the same as in OpenBSD */ 602 goto fail; 603 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 604 } 605 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 606 size = (krp->krp_param[i].crp_nbits + 7) / 8; 607 if (size == 0) 608 continue; 609 krp->krp_param[i].crp_p = kmalloc(size, M_XDATA, M_WAITOK); 610 if (i >= krp->krp_iparams) 611 continue; 612 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 613 if (error) 614 goto fail; 615 } 616 617 error = crypto_kdispatch(krp); 618 if (error) 619 goto fail; 620 error = tsleep(krp, 0, "crydev", 0); 621 if (error) { 622 /* XXX can this happen? if so, how do we recover? */ 623 goto fail; 624 } 625 626 kop->crk_crid = krp->krp_crid; /* device that did the work */ 627 if (krp->krp_status != 0) { 628 error = krp->krp_status; 629 goto fail; 630 } 631 632 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 633 size = (krp->krp_param[i].crp_nbits + 7) / 8; 634 if (size == 0) 635 continue; 636 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 637 if (error) 638 goto fail; 639 } 640 641 fail: 642 if (krp) { 643 kop->crk_status = krp->krp_status; 644 for (i = 0; i < CRK_MAXPARAM; i++) { 645 if (krp->krp_param[i].crp_p) 646 kfree(krp->krp_param[i].crp_p, M_XDATA); 647 } 648 kfree(krp, M_XDATA); 649 } 650 return (error); 651 } 652 653 static int 654 cryptodev_find(struct crypt_find_op *find) 655 { 656 device_t dev; 657 658 if (find->crid != -1) { 659 dev = crypto_find_device_byhid(find->crid); 660 if (dev == NULL) 661 return (ENOENT); 662 strlcpy(find->name, device_get_nameunit(dev), 663 sizeof(find->name)); 664 } else { 665 find->crid = crypto_find_driver(find->name); 666 if (find->crid == -1) 667 return (ENOENT); 668 } 669 return (0); 670 } 671 672 /* 673 * MPSAFE 674 */ 675 static int 676 cryptof_poll(struct file *fp, int events, struct ucred *active_cred) 677 { 678 return (0); 679 } 680 681 /* 682 * MPSAFE 683 */ 684 static int 685 cryptof_kqfilter(struct file *fp, struct knote *kn) 686 { 687 688 return (0); 689 } 690 691 /* 692 * MPSAFE 693 */ 694 static int 695 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred) 696 { 697 return (EOPNOTSUPP); 698 } 699 700 /* 701 * MPALMOSTSAFE - acquires mplock 702 */ 703 static int 704 cryptof_close(struct file *fp) 705 { 706 struct fcrypt *fcr = fp->f_data; 707 struct csession *cse; 708 709 get_mplock(); 710 fcr = (struct fcrypt *)fp->f_data; 711 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 712 TAILQ_REMOVE(&fcr->csessions, cse, next); 713 (void)csefree(cse); 714 } 715 fp->f_data = NULL; 716 rel_mplock(); 717 718 kfree(fcr, M_XDATA); 719 return (0); 720 } 721 722 static struct csession * 723 csefind(struct fcrypt *fcr, u_int ses) 724 { 725 struct csession *cse; 726 727 TAILQ_FOREACH(cse, &fcr->csessions, next) 728 if (cse->ses == ses) 729 return (cse); 730 return (NULL); 731 } 732 733 static int 734 csedelete(struct fcrypt *fcr, struct csession *cse_del) 735 { 736 struct csession *cse; 737 738 TAILQ_FOREACH(cse, &fcr->csessions, next) { 739 if (cse == cse_del) { 740 TAILQ_REMOVE(&fcr->csessions, cse, next); 741 return (1); 742 } 743 } 744 return (0); 745 } 746 747 static struct csession * 748 cseadd(struct fcrypt *fcr, struct csession *cse) 749 { 750 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 751 cse->ses = fcr->sesn++; 752 return (cse); 753 } 754 755 struct csession * 756 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 757 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 758 struct enc_xform *txform, struct auth_hash *thash) 759 { 760 struct csession *cse; 761 762 cse = kmalloc(sizeof(struct csession), M_XDATA, M_NOWAIT); 763 if (cse == NULL) 764 return NULL; 765 lockinit(&cse->lock, "cryptodev", 0, LK_CANRECURSE); 766 cse->key = key; 767 cse->keylen = keylen/8; 768 cse->mackey = mackey; 769 cse->mackeylen = mackeylen/8; 770 cse->sid = sid; 771 cse->cipher = cipher; 772 cse->mac = mac; 773 cse->txform = txform; 774 cse->thash = thash; 775 cseadd(fcr, cse); 776 return (cse); 777 } 778 779 static int 780 csefree(struct csession *cse) 781 { 782 int error; 783 784 error = crypto_freesession(cse->sid); 785 lockuninit(&cse->lock); 786 if (cse->key) 787 kfree(cse->key, M_XDATA); 788 if (cse->mackey) 789 kfree(cse->mackey, M_XDATA); 790 kfree(cse, M_XDATA); 791 return (error); 792 } 793 794 static int 795 cryptoopen(struct dev_open_args *ap) 796 { 797 return (0); 798 } 799 800 static int 801 cryptoread(struct dev_read_args *ap) 802 { 803 return (EIO); 804 } 805 806 static int 807 cryptowrite(struct dev_write_args *ap) 808 { 809 return (EIO); 810 } 811 812 static int 813 cryptoioctl(struct dev_ioctl_args *ap) 814 { 815 struct thread *td = curthread; 816 struct file *f; 817 struct fcrypt *fcr; 818 int fd, error; 819 820 switch (ap->a_cmd) { 821 case CRIOGET: 822 fcr = kmalloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK); 823 TAILQ_INIT(&fcr->csessions); 824 fcr->sesn = 0; 825 826 KKASSERT(td->td_lwp); 827 error = falloc(td->td_lwp, &f, &fd); 828 829 if (error) { 830 kfree(fcr, M_XDATA); 831 return (error); 832 } 833 /* falloc automatically provides an extra reference to 'f'. */ 834 f->f_flag = FREAD | FWRITE; 835 f->f_type = DTYPE_CRYPTO; 836 f->f_ops = &cryptofops; 837 f->f_data = fcr; 838 fsetfd(td->td_proc->p_fd, f, fd); 839 *(u_int32_t *)ap->a_data = fd; 840 fdrop(f); 841 842 break; 843 case CRIOFINDDEV: 844 error = cryptodev_find((struct crypt_find_op *)ap->a_data); 845 break; 846 case CRIOASYMFEAT: 847 error = crypto_getfeat((int *)ap->a_data); 848 break; 849 default: 850 error = EINVAL; 851 break; 852 } 853 return (error); 854 } 855 856 static struct dev_ops crypto_ops = { 857 { "crypto", 0, D_MPSAFE_READ | D_MPSAFE_WRITE | D_MPSAFE_IOCTL }, 858 .d_open = cryptoopen, 859 .d_read = cryptoread, 860 .d_write = cryptowrite, 861 .d_ioctl = cryptoioctl, 862 }; 863 864 /* 865 * Initialization code, both for static and dynamic loading. 866 */ 867 static int 868 cryptodev_modevent(module_t mod, int type, void *unused) 869 { 870 switch (type) { 871 case MOD_LOAD: 872 if (bootverbose) 873 kprintf("crypto: <crypto device>\n"); 874 make_dev(&crypto_ops, 0, UID_ROOT, GID_WHEEL, 875 0666, "crypto"); 876 return 0; 877 case MOD_UNLOAD: 878 /*XXX disallow if active sessions */ 879 //dev_ops_remove(&crypto_ops, 0, 0); 880 dev_ops_remove_all(&crypto_ops); 881 return 0; 882 } 883 return EINVAL; 884 } 885 886 static moduledata_t cryptodev_mod = { 887 "cryptodev", 888 cryptodev_modevent, 889 0 890 }; 891 MODULE_VERSION(cryptodev, 1); 892 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 893 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 894 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 895