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 #include <sys/file2.h> 54 #include <sys/thread2.h> 55 56 #include <opencrypto/cryptodev.h> 57 #include <opencrypto/xform.h> 58 59 struct csession { 60 TAILQ_ENTRY(csession) next; 61 u_int64_t sid; 62 u_int32_t ses; 63 struct lock lock; 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 82 struct fcrypt { 83 TAILQ_HEAD(csessionlist, csession) csessions; 84 int sesn; 85 }; 86 87 static int cryptof_rw(struct file *fp, struct uio *uio, 88 struct ucred *cred, int flags); 89 static int cryptof_ioctl(struct file *, u_long, caddr_t, 90 struct ucred *, struct sysmsg *); 91 static int cryptof_poll(struct file *, int, struct ucred *); 92 static int cryptof_kqfilter(struct file *, struct knote *); 93 static int cryptof_stat(struct file *, struct stat *, struct ucred *); 94 static int cryptof_close(struct file *); 95 96 static struct fileops cryptofops = { 97 .fo_read = cryptof_rw, 98 .fo_write = cryptof_rw, 99 .fo_ioctl = cryptof_ioctl, 100 .fo_poll = cryptof_poll, 101 .fo_kqfilter = cryptof_kqfilter, 102 .fo_stat = cryptof_stat, 103 .fo_close = cryptof_close, 104 .fo_shutdown = nofo_shutdown 105 }; 106 107 static struct csession *csefind(struct fcrypt *, u_int); 108 static int csedelete(struct fcrypt *, struct csession *); 109 static struct csession *cseadd(struct fcrypt *, struct csession *); 110 static 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 *); 113 static int csefree(struct csession *); 114 115 static int cryptodev_op(struct csession *, struct crypt_op *, struct ucred *); 116 static int cryptodev_key(struct crypt_kop *); 117 static int cryptodev_find(struct crypt_find_op *); 118 119 static int 120 cryptof_rw( 121 struct file *fp, 122 struct uio *uio, 123 struct ucred *active_cred, 124 int flags) 125 { 126 return (EIO); 127 } 128 129 /* 130 * Check a crypto identifier to see if it requested 131 * a software device/driver. This can be done either 132 * by device name/class or through search constraints. 133 */ 134 static int 135 checkforsoftware(int crid) 136 { 137 if (crid & CRYPTOCAP_F_SOFTWARE) 138 return EINVAL; /* XXX */ 139 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 140 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 141 return EINVAL; /* XXX */ 142 return 0; 143 } 144 145 /* ARGSUSED */ 146 static int 147 cryptof_ioctl(struct file *fp, u_long cmd, caddr_t data, 148 struct ucred *cred, struct sysmsg *msg) 149 { 150 #define SES2(p) ((struct session2_op *)p) 151 struct cryptoini cria, crie; 152 struct fcrypt *fcr = fp->f_data; 153 struct csession *cse; 154 struct session_op *sop; 155 struct crypt_op *cop; 156 struct enc_xform *txform = NULL; 157 struct auth_hash *thash = NULL; 158 struct crypt_kop *kop; 159 u_int64_t sid; 160 u_int32_t ses; 161 int error = 0, crid; 162 163 switch (cmd) { 164 case CIOCGSESSION: 165 case CIOCGSESSION2: 166 sop = (struct session_op *)data; 167 switch (sop->cipher) { 168 case 0: 169 break; 170 case CRYPTO_DES_CBC: 171 txform = &enc_xform_des; 172 break; 173 case CRYPTO_3DES_CBC: 174 txform = &enc_xform_3des; 175 break; 176 case CRYPTO_BLF_CBC: 177 txform = &enc_xform_blf; 178 break; 179 case CRYPTO_CAST_CBC: 180 txform = &enc_xform_cast5; 181 break; 182 case CRYPTO_SKIPJACK_CBC: 183 txform = &enc_xform_skipjack; 184 break; 185 case CRYPTO_AES_CBC: 186 txform = &enc_xform_rijndael128; 187 break; 188 case CRYPTO_NULL_CBC: 189 txform = &enc_xform_null; 190 break; 191 case CRYPTO_ARC4: 192 txform = &enc_xform_arc4; 193 break; 194 case CRYPTO_CAMELLIA_CBC: 195 txform = &enc_xform_camellia; 196 break; 197 default: 198 return (EINVAL); 199 } 200 201 switch (sop->mac) { 202 case 0: 203 break; 204 case CRYPTO_MD5_HMAC: 205 thash = &auth_hash_hmac_md5; 206 break; 207 case CRYPTO_SHA1_HMAC: 208 thash = &auth_hash_hmac_sha1; 209 break; 210 case CRYPTO_SHA2_256_HMAC: 211 thash = &auth_hash_hmac_sha2_256; 212 break; 213 case CRYPTO_SHA2_384_HMAC: 214 thash = &auth_hash_hmac_sha2_384; 215 break; 216 case CRYPTO_SHA2_512_HMAC: 217 thash = &auth_hash_hmac_sha2_512; 218 break; 219 case CRYPTO_RIPEMD160_HMAC: 220 thash = &auth_hash_hmac_ripemd_160; 221 break; 222 #ifdef notdef 223 case CRYPTO_MD5: 224 thash = &auth_hash_md5; 225 break; 226 case CRYPTO_SHA1: 227 thash = &auth_hash_sha1; 228 break; 229 #endif 230 case CRYPTO_NULL_HMAC: 231 thash = &auth_hash_null; 232 break; 233 default: 234 return (EINVAL); 235 } 236 237 bzero(&crie, sizeof(crie)); 238 bzero(&cria, sizeof(cria)); 239 240 if (txform) { 241 crie.cri_alg = txform->type; 242 crie.cri_klen = sop->keylen * 8; 243 if (sop->keylen > txform->maxkey || 244 sop->keylen < txform->minkey) { 245 error = EINVAL; 246 goto bail; 247 } 248 249 crie.cri_key = kmalloc(crie.cri_klen / 8, 250 M_XDATA, M_WAITOK); 251 if ((error = copyin(sop->key, crie.cri_key, 252 crie.cri_klen / 8))) 253 goto bail; 254 if (thash) 255 crie.cri_next = &cria; 256 } 257 258 if (thash) { 259 cria.cri_alg = thash->type; 260 cria.cri_klen = sop->mackeylen * 8; 261 if (sop->mackeylen != thash->keysize) { 262 error = EINVAL; 263 goto bail; 264 } 265 266 if (cria.cri_klen) { 267 cria.cri_key = kmalloc(cria.cri_klen / 8, 268 M_XDATA, M_WAITOK); 269 if ((error = copyin(sop->mackey, cria.cri_key, 270 cria.cri_klen / 8))) 271 goto bail; 272 } 273 } 274 275 /* NB: CIOGSESSION2 has the crid */ 276 if (cmd == CIOCGSESSION2) { 277 crid = SES2(sop)->crid; 278 error = checkforsoftware(crid); 279 if (error) 280 goto bail; 281 } else 282 crid = CRYPTOCAP_F_HARDWARE; 283 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid); 284 if (error) 285 goto bail; 286 287 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 288 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 289 thash); 290 291 if (cse == NULL) { 292 crypto_freesession(sid); 293 error = EINVAL; 294 goto bail; 295 } 296 sop->ses = cse->ses; 297 if (cmd == CIOCGSESSION2) { 298 /* return hardware/driver id */ 299 SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid); 300 } 301 bail: 302 if (error) { 303 if (crie.cri_key) 304 kfree(crie.cri_key, M_XDATA); 305 if (cria.cri_key) 306 kfree(cria.cri_key, M_XDATA); 307 } 308 break; 309 case CIOCFSESSION: 310 ses = *(u_int32_t *)data; 311 cse = csefind(fcr, ses); 312 if (cse == NULL) 313 return (EINVAL); 314 csedelete(fcr, cse); 315 error = csefree(cse); 316 break; 317 case CIOCCRYPT: 318 cop = (struct crypt_op *)data; 319 cse = csefind(fcr, cop->ses); 320 if (cse == NULL) 321 return (EINVAL); 322 error = cryptodev_op(cse, cop, cred); 323 break; 324 case CIOCKEY: 325 case CIOCKEY2: 326 if (!crypto_userasymcrypto) 327 return (EPERM); /* XXX compat? */ 328 get_mplock(); 329 kop = (struct crypt_kop *)data; 330 if (cmd == CIOCKEY) { 331 /* NB: crypto core enforces s/w driver use */ 332 kop->crk_crid = 333 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 334 } 335 error = cryptodev_key(kop); 336 rel_mplock(); 337 break; 338 case CIOCASYMFEAT: 339 if (!crypto_userasymcrypto) { 340 /* 341 * NB: if user asym crypto operations are 342 * not permitted return "no algorithms" 343 * so well-behaved applications will just 344 * fallback to doing them in software. 345 */ 346 *(int *)data = 0; 347 } else 348 error = crypto_getfeat((int *)data); 349 break; 350 case CIOCFINDDEV: 351 error = cryptodev_find((struct crypt_find_op *)data); 352 break; 353 default: 354 error = EINVAL; 355 break; 356 } 357 return (error); 358 #undef SES2 359 } 360 361 static int cryptodev_cb(void *); 362 363 364 static int 365 cryptodev_op(struct csession *cse, struct crypt_op *cop, 366 struct ucred *active_cred) 367 { 368 struct cryptop *crp = NULL; 369 struct cryptodesc *crde = NULL, *crda = NULL; 370 int error; 371 372 if (cop->len > 256*1024-4) 373 return (E2BIG); 374 375 if (cse->txform) { 376 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 377 return (EINVAL); 378 } 379 380 bzero(&cse->uio, sizeof(cse->uio)); 381 cse->uio.uio_iov = &cse->iovec; 382 cse->uio.uio_iovcnt = 1; 383 cse->uio.uio_offset = 0; 384 cse->uio.uio_resid = cop->len; 385 cse->uio.uio_segflg = UIO_SYSSPACE; 386 cse->uio.uio_rw = UIO_WRITE; 387 /* XXX: not sure, was td, now curthread? */ 388 cse->uio.uio_td = curthread; 389 cse->uio.uio_iov[0].iov_len = cop->len; 390 if (cse->thash) { 391 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize; 392 cse->uio.uio_resid += cse->thash->hashsize; 393 } 394 cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len, 395 M_XDATA, M_WAITOK); 396 397 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 398 if (crp == NULL) { 399 error = ENOMEM; 400 goto bail; 401 } 402 403 if (cse->thash) { 404 crda = crp->crp_desc; 405 if (cse->txform) 406 crde = crda->crd_next; 407 } else { 408 if (cse->txform) 409 crde = crp->crp_desc; 410 else { 411 error = EINVAL; 412 goto bail; 413 } 414 } 415 416 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 417 goto bail; 418 419 if (crda) { 420 crda->crd_skip = 0; 421 crda->crd_len = cop->len; 422 crda->crd_inject = cop->len; 423 424 crda->crd_alg = cse->mac; 425 crda->crd_key = cse->mackey; 426 crda->crd_klen = cse->mackeylen * 8; 427 } 428 429 if (crde) { 430 if (cop->op == COP_ENCRYPT) 431 crde->crd_flags |= CRD_F_ENCRYPT; 432 else 433 crde->crd_flags &= ~CRD_F_ENCRYPT; 434 crde->crd_len = cop->len; 435 crde->crd_inject = 0; 436 437 crde->crd_alg = cse->cipher; 438 crde->crd_key = cse->key; 439 crde->crd_klen = cse->keylen * 8; 440 } 441 442 crp->crp_ilen = cop->len; 443 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 444 | (cop->flags & COP_F_BATCH); 445 crp->crp_buf = (caddr_t)&cse->uio; 446 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 447 crp->crp_sid = cse->sid; 448 crp->crp_opaque = (void *)cse; 449 450 if (cop->iv) { 451 if (crde == NULL) { 452 error = EINVAL; 453 goto bail; 454 } 455 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 456 error = EINVAL; 457 goto bail; 458 } 459 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 460 goto bail; 461 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 462 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 463 crde->crd_skip = 0; 464 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 465 crde->crd_skip = 0; 466 } else if (crde) { 467 crde->crd_flags |= CRD_F_IV_PRESENT; 468 crde->crd_skip = cse->txform->blocksize; 469 crde->crd_len -= cse->txform->blocksize; 470 } 471 472 if (cop->mac && crda == NULL) { 473 error = EINVAL; 474 goto bail; 475 } 476 477 again: 478 /* 479 * Let the dispatch run unlocked, then, interlock against the 480 * callback before checking if the operation completed and going 481 * to sleep. This insures drivers don't inherit our lock which 482 * results in a lock order reversal between crypto_dispatch forced 483 * entry and the crypto_done callback into us. 484 */ 485 error = crypto_dispatch(crp); 486 lockmgr(&cse->lock, LK_EXCLUSIVE); 487 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 488 error = lksleep(crp, &cse->lock, 0, "crydev", 0); 489 lockmgr(&cse->lock, LK_RELEASE); 490 491 if (error != 0) 492 goto bail; 493 494 if (crp->crp_etype == EAGAIN) { 495 crp->crp_etype = 0; 496 crp->crp_flags &= ~CRYPTO_F_DONE; 497 goto again; 498 } 499 500 if (crp->crp_etype != 0) { 501 error = crp->crp_etype; 502 goto bail; 503 } 504 505 if (cse->error) { 506 error = cse->error; 507 goto bail; 508 } 509 510 if (cop->dst && 511 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 512 goto bail; 513 514 if (cop->mac && 515 (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len, 516 cop->mac, cse->thash->hashsize))) 517 goto bail; 518 519 bail: 520 if (crp) 521 crypto_freereq(crp); 522 if (cse->uio.uio_iov[0].iov_base) 523 kfree(cse->uio.uio_iov[0].iov_base, M_XDATA); 524 525 return (error); 526 } 527 528 static int 529 cryptodev_cb(void *op) 530 { 531 struct cryptop *crp = (struct cryptop *) op; 532 struct csession *cse = (struct csession *)crp->crp_opaque; 533 534 lockmgr(&cse->lock, LK_EXCLUSIVE); 535 cse->error = crp->crp_etype; 536 wakeup_one(crp); 537 lockmgr(&cse->lock, LK_RELEASE); 538 return (0); 539 } 540 541 static int 542 cryptodevkey_cb(void *op) 543 { 544 struct cryptkop *krp = (struct cryptkop *) op; 545 546 wakeup_one(krp); 547 return (0); 548 } 549 550 static int 551 cryptodev_key(struct crypt_kop *kop) 552 { 553 struct cryptkop *krp = NULL; 554 int error = EINVAL; 555 int in, out, size, i; 556 557 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 558 return (EFBIG); 559 } 560 561 in = kop->crk_iparams; 562 out = kop->crk_oparams; 563 switch (kop->crk_op) { 564 case CRK_MOD_EXP: 565 if (in == 3 && out == 1) 566 break; 567 return (EINVAL); 568 case CRK_MOD_EXP_CRT: 569 if (in == 6 && out == 1) 570 break; 571 return (EINVAL); 572 case CRK_DSA_SIGN: 573 if (in == 5 && out == 2) 574 break; 575 return (EINVAL); 576 case CRK_DSA_VERIFY: 577 if (in == 7 && out == 0) 578 break; 579 return (EINVAL); 580 case CRK_DH_COMPUTE_KEY: 581 if (in == 3 && out == 1) 582 break; 583 return (EINVAL); 584 default: 585 return (EINVAL); 586 } 587 588 krp = (struct cryptkop *)kmalloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO); 589 krp->krp_op = kop->crk_op; 590 krp->krp_status = kop->crk_status; 591 krp->krp_iparams = kop->crk_iparams; 592 krp->krp_oparams = kop->crk_oparams; 593 krp->krp_crid = kop->crk_crid; 594 krp->krp_status = 0; 595 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 596 597 for (i = 0; i < CRK_MAXPARAM; i++) { 598 if (kop->crk_param[i].crp_nbits > 65536) 599 /* Limit is the same as in OpenBSD */ 600 goto fail; 601 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 602 } 603 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 604 size = (krp->krp_param[i].crp_nbits + 7) / 8; 605 if (size == 0) 606 continue; 607 krp->krp_param[i].crp_p = kmalloc(size, M_XDATA, M_WAITOK); 608 if (i >= krp->krp_iparams) 609 continue; 610 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 611 if (error) 612 goto fail; 613 } 614 615 error = crypto_kdispatch(krp); 616 if (error) 617 goto fail; 618 error = tsleep(krp, 0, "crydev", 0); 619 if (error) { 620 /* XXX can this happen? if so, how do we recover? */ 621 goto fail; 622 } 623 624 kop->crk_crid = krp->krp_crid; /* device that did the work */ 625 if (krp->krp_status != 0) { 626 error = krp->krp_status; 627 goto fail; 628 } 629 630 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 631 size = (krp->krp_param[i].crp_nbits + 7) / 8; 632 if (size == 0) 633 continue; 634 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 635 if (error) 636 goto fail; 637 } 638 639 fail: 640 if (krp) { 641 kop->crk_status = krp->krp_status; 642 for (i = 0; i < CRK_MAXPARAM; i++) { 643 if (krp->krp_param[i].crp_p) 644 kfree(krp->krp_param[i].crp_p, M_XDATA); 645 } 646 kfree(krp, M_XDATA); 647 } 648 return (error); 649 } 650 651 static int 652 cryptodev_find(struct crypt_find_op *find) 653 { 654 device_t dev; 655 656 if (find->crid != -1) { 657 dev = crypto_find_device_byhid(find->crid); 658 if (dev == NULL) 659 return (ENOENT); 660 strlcpy(find->name, device_get_nameunit(dev), 661 sizeof(find->name)); 662 } else { 663 find->crid = crypto_find_driver(find->name); 664 if (find->crid == -1) 665 return (ENOENT); 666 } 667 return (0); 668 } 669 670 /* 671 * MPSAFE 672 */ 673 static int 674 cryptof_poll(struct file *fp, int events, struct ucred *active_cred) 675 { 676 return (0); 677 } 678 679 /* 680 * MPSAFE 681 */ 682 static int 683 cryptof_kqfilter(struct file *fp, struct knote *kn) 684 { 685 686 return (0); 687 } 688 689 /* 690 * MPSAFE 691 */ 692 static int 693 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred) 694 { 695 return (EOPNOTSUPP); 696 } 697 698 /* 699 * MPALMOSTSAFE - acquires mplock 700 */ 701 static int 702 cryptof_close(struct file *fp) 703 { 704 struct fcrypt *fcr = fp->f_data; 705 struct csession *cse; 706 707 get_mplock(); 708 fcr = (struct fcrypt *)fp->f_data; 709 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 710 TAILQ_REMOVE(&fcr->csessions, cse, next); 711 (void)csefree(cse); 712 } 713 fp->f_data = NULL; 714 rel_mplock(); 715 716 kfree(fcr, M_XDATA); 717 return (0); 718 } 719 720 static struct csession * 721 csefind(struct fcrypt *fcr, u_int ses) 722 { 723 struct csession *cse; 724 725 TAILQ_FOREACH(cse, &fcr->csessions, next) 726 if (cse->ses == ses) 727 return (cse); 728 return (NULL); 729 } 730 731 static int 732 csedelete(struct fcrypt *fcr, struct csession *cse_del) 733 { 734 struct csession *cse; 735 736 TAILQ_FOREACH(cse, &fcr->csessions, next) { 737 if (cse == cse_del) { 738 TAILQ_REMOVE(&fcr->csessions, cse, next); 739 return (1); 740 } 741 } 742 return (0); 743 } 744 745 static struct csession * 746 cseadd(struct fcrypt *fcr, struct csession *cse) 747 { 748 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 749 cse->ses = fcr->sesn++; 750 return (cse); 751 } 752 753 struct csession * 754 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 755 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 756 struct enc_xform *txform, struct auth_hash *thash) 757 { 758 struct csession *cse; 759 760 cse = kmalloc(sizeof(struct csession), M_XDATA, M_NOWAIT); 761 if (cse == NULL) 762 return NULL; 763 lockinit(&cse->lock, "cryptodev", 0, LK_CANRECURSE); 764 cse->key = key; 765 cse->keylen = keylen/8; 766 cse->mackey = mackey; 767 cse->mackeylen = mackeylen/8; 768 cse->sid = sid; 769 cse->cipher = cipher; 770 cse->mac = mac; 771 cse->txform = txform; 772 cse->thash = thash; 773 cseadd(fcr, cse); 774 return (cse); 775 } 776 777 static int 778 csefree(struct csession *cse) 779 { 780 int error; 781 782 error = crypto_freesession(cse->sid); 783 lockuninit(&cse->lock); 784 if (cse->key) 785 kfree(cse->key, M_XDATA); 786 if (cse->mackey) 787 kfree(cse->mackey, M_XDATA); 788 kfree(cse, M_XDATA); 789 return (error); 790 } 791 792 static int 793 cryptoopen(struct dev_open_args *ap) 794 { 795 return (0); 796 } 797 798 static int 799 cryptoread(struct dev_read_args *ap) 800 { 801 return (EIO); 802 } 803 804 static int 805 cryptowrite(struct dev_write_args *ap) 806 { 807 return (EIO); 808 } 809 810 static int 811 cryptoioctl(struct dev_ioctl_args *ap) 812 { 813 struct file *f; 814 struct fcrypt *fcr; 815 int fd, error; 816 817 switch (ap->a_cmd) { 818 case CRIOGET: 819 fcr = kmalloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK); 820 TAILQ_INIT(&fcr->csessions); 821 fcr->sesn = 0; 822 823 KKASSERT(curproc); 824 error = falloc(curproc, &f, &fd); 825 826 if (error) { 827 kfree(fcr, M_XDATA); 828 return (error); 829 } 830 /* falloc automatically provides an extra reference to 'f'. */ 831 f->f_flag = FREAD | FWRITE; 832 f->f_type = DTYPE_CRYPTO; 833 f->f_ops = &cryptofops; 834 f->f_data = fcr; 835 fsetfd(curproc, f, fd); 836 *(u_int32_t *)ap->a_data = fd; 837 fdrop(f); 838 839 break; 840 case CRIOFINDDEV: 841 error = cryptodev_find((struct crypt_find_op *)ap->a_data); 842 break; 843 case CRIOASYMFEAT: 844 error = crypto_getfeat((int *)ap->a_data); 845 break; 846 default: 847 error = EINVAL; 848 break; 849 } 850 return (error); 851 } 852 853 static struct dev_ops crypto_ops = { 854 { "crypto", 0, 0 }, 855 .d_open = cryptoopen, 856 .d_read = cryptoread, 857 .d_write = cryptowrite, 858 .d_ioctl = cryptoioctl, 859 }; 860 861 /* 862 * Initialization code, both for static and dynamic loading. 863 */ 864 static int 865 cryptodev_modevent(module_t mod, int type, void *unused) 866 { 867 switch (type) { 868 case MOD_LOAD: 869 if (bootverbose) 870 kprintf("crypto: <crypto device>\n"); 871 make_dev(&crypto_ops, 0, UID_ROOT, GID_WHEEL, 872 0666, "crypto"); 873 return 0; 874 case MOD_UNLOAD: 875 /*XXX disallow if active sessions */ 876 //dev_ops_remove(&crypto_ops, 0, 0); 877 dev_ops_remove_all(&crypto_ops); 878 return 0; 879 } 880 return EINVAL; 881 } 882 883 static moduledata_t cryptodev_mod = { 884 "cryptodev", 885 cryptodev_modevent, 886 0 887 }; 888 MODULE_VERSION(cryptodev, 1); 889 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 890 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 891 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 892