cryptodev.c revision 1.18
1 /* $NetBSD: cryptodev.c,v 1.18 2006/03/06 00:50:44 christos Exp $ */ 2 /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.4 2003/06/03 00:09:02 sam Exp $ */ 3 /* $OpenBSD: cryptodev.c,v 1.53 2002/07/10 22:21:30 mickey Exp $ */ 4 5 /* 6 * Copyright (c) 2001 Theo de Raadt 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 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: cryptodev.c,v 1.18 2006/03/06 00:50:44 christos Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/malloc.h> 43 #include <sys/mbuf.h> 44 #include <sys/sysctl.h> 45 #include <sys/file.h> 46 #include <sys/filedesc.h> 47 #include <sys/errno.h> 48 #include <sys/md5.h> 49 #include <sys/sha1.h> 50 #include <sys/conf.h> 51 #include <sys/device.h> 52 53 #include <opencrypto/cryptodev.h> 54 #include <opencrypto/xform.h> 55 56 #ifdef __NetBSD__ 57 #define splcrypto splnet 58 #endif 59 #ifdef CRYPTO_DEBUG 60 #define DPRINTF(a) uprintf a 61 #else 62 #define DPRINTF(a) 63 #endif 64 65 struct csession { 66 TAILQ_ENTRY(csession) next; 67 u_int64_t sid; 68 u_int32_t ses; 69 70 u_int32_t cipher; 71 struct enc_xform *txform; 72 u_int32_t mac; 73 struct auth_hash *thash; 74 75 caddr_t key; 76 int keylen; 77 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 78 79 caddr_t mackey; 80 int mackeylen; 81 u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; 82 83 struct iovec iovec[IOV_MAX]; 84 struct uio uio; 85 int error; 86 }; 87 88 struct fcrypt { 89 TAILQ_HEAD(csessionlist, csession) csessions; 90 int sesn; 91 }; 92 93 94 /* Declaration of master device (fd-cloning/ctxt-allocating) entrypoints */ 95 static int cryptoopen(dev_t dev, int flag, int mode, struct lwp *l); 96 static int cryptoread(dev_t dev, struct uio *uio, int ioflag); 97 static int cryptowrite(dev_t dev, struct uio *uio, int ioflag); 98 static int cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l); 99 static int cryptoselect(dev_t dev, int rw, struct lwp *l); 100 101 /* Declaration of cloned-device (per-ctxt) entrypoints */ 102 static int cryptof_read(struct file *, off_t *, struct uio *, struct ucred *, int); 103 static int cryptof_write(struct file *, off_t *, struct uio *, struct ucred *, int); 104 static int cryptof_ioctl(struct file *, u_long, void*, struct lwp *l); 105 static int cryptof_close(struct file *, struct lwp *); 106 107 static const struct fileops cryptofops = { 108 cryptof_read, 109 cryptof_write, 110 cryptof_ioctl, 111 fnullop_fcntl, 112 fnullop_poll, 113 fbadop_stat, 114 cryptof_close, 115 fnullop_kqfilter 116 }; 117 118 static struct csession *csefind(struct fcrypt *, u_int); 119 static int csedelete(struct fcrypt *, struct csession *); 120 static struct csession *cseadd(struct fcrypt *, struct csession *); 121 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, u_int64_t, 122 caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 123 struct auth_hash *); 124 static int csefree(struct csession *); 125 126 static int cryptodev_op(struct csession *, struct crypt_op *, struct lwp *); 127 static int cryptodev_key(struct crypt_kop *); 128 int cryptodev_dokey(struct crypt_kop *kop, struct crparam kvp[]); 129 130 static int cryptodev_cb(void *); 131 static int cryptodevkey_cb(void *); 132 133 /* 134 * sysctl-able control variables for /dev/crypto now defined in crypto.c: 135 * crypto_usercrypto, crypto_userasmcrypto, crypto_devallowsoft. 136 */ 137 138 /* ARGSUSED */ 139 int 140 cryptof_read(struct file *fp, off_t *poff, struct uio *uio, 141 struct ucred *cred, int flags) 142 { 143 return (EIO); 144 } 145 146 /* ARGSUSED */ 147 int 148 cryptof_write(struct file *fp, off_t *poff, struct uio *uio, 149 struct ucred *cred, int flags) 150 { 151 return (EIO); 152 } 153 154 /* ARGSUSED */ 155 int 156 cryptof_ioctl(struct file *fp, u_long cmd, void* data, struct lwp *l) 157 { 158 struct cryptoini cria, crie; 159 struct fcrypt *fcr = (struct fcrypt *)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 u_int64_t sid; 166 u_int32_t ses; 167 int error = 0; 168 169 switch (cmd) { 170 case CIOCGSESSION: 171 sop = (struct session_op *)data; 172 switch (sop->cipher) { 173 case 0: 174 break; 175 case CRYPTO_DES_CBC: 176 txform = &enc_xform_des; 177 break; 178 case CRYPTO_3DES_CBC: 179 txform = &enc_xform_3des; 180 break; 181 case CRYPTO_BLF_CBC: 182 txform = &enc_xform_blf; 183 break; 184 case CRYPTO_CAST_CBC: 185 txform = &enc_xform_cast5; 186 break; 187 case CRYPTO_SKIPJACK_CBC: 188 txform = &enc_xform_skipjack; 189 break; 190 case CRYPTO_AES_CBC: 191 txform = &enc_xform_rijndael128; 192 break; 193 case CRYPTO_NULL_CBC: 194 txform = &enc_xform_null; 195 break; 196 case CRYPTO_ARC4: 197 txform = &enc_xform_arc4; 198 break; 199 default: 200 DPRINTF(("Invalid cipher %d\n", sop->cipher)); 201 return (EINVAL); 202 } 203 204 switch (sop->mac) { 205 case 0: 206 break; 207 case CRYPTO_MD5_HMAC: 208 thash = &auth_hash_hmac_md5_96; 209 break; 210 case CRYPTO_SHA1_HMAC: 211 thash = &auth_hash_hmac_sha1_96; 212 break; 213 case CRYPTO_SHA2_HMAC: 214 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 215 thash = &auth_hash_hmac_sha2_256; 216 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 217 thash = &auth_hash_hmac_sha2_384; 218 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 219 thash = &auth_hash_hmac_sha2_512; 220 else { 221 DPRINTF(("Invalid mackeylen %d\n", 222 sop->mackeylen)); 223 return (EINVAL); 224 } 225 break; 226 case CRYPTO_RIPEMD160_HMAC: 227 thash = &auth_hash_hmac_ripemd_160_96; 228 break; 229 case CRYPTO_MD5: 230 thash = &auth_hash_md5; 231 break; 232 case CRYPTO_SHA1: 233 thash = &auth_hash_sha1; 234 break; 235 case CRYPTO_NULL_HMAC: 236 thash = &auth_hash_null; 237 break; 238 default: 239 DPRINTF(("Invalid mac %d\n", sop->mac)); 240 return (EINVAL); 241 } 242 243 bzero(&crie, sizeof(crie)); 244 bzero(&cria, sizeof(cria)); 245 246 if (txform) { 247 crie.cri_alg = txform->type; 248 crie.cri_klen = sop->keylen * 8; 249 if (sop->keylen > txform->maxkey || 250 sop->keylen < txform->minkey) { 251 DPRINTF(("keylen %d not in [%d,%d]\n", 252 sop->keylen, txform->minkey, 253 txform->maxkey)); 254 error = EINVAL; 255 goto bail; 256 } 257 258 MALLOC(crie.cri_key, u_int8_t *, 259 crie.cri_klen / 8, M_XDATA, M_WAITOK); 260 if ((error = copyin(sop->key, crie.cri_key, 261 crie.cri_klen / 8))) 262 goto bail; 263 if (thash) 264 crie.cri_next = &cria; 265 } 266 267 if (thash) { 268 cria.cri_alg = thash->type; 269 cria.cri_klen = sop->mackeylen * 8; 270 if (sop->mackeylen != thash->keysize) { 271 DPRINTF(("mackeylen %d != keysize %d\n", 272 sop->mackeylen, thash->keysize)); 273 error = EINVAL; 274 goto bail; 275 } 276 277 if (cria.cri_klen) { 278 MALLOC(cria.cri_key, u_int8_t *, 279 cria.cri_klen / 8, M_XDATA, M_WAITOK); 280 if ((error = copyin(sop->mackey, cria.cri_key, 281 cria.cri_klen / 8))) 282 goto bail; 283 } 284 } 285 286 error = crypto_newsession(&sid, (txform ? &crie : &cria), 287 crypto_devallowsoft); 288 if (error) { 289 DPRINTF(("SIOCSESSION violates kernel parameters %d\n", 290 error)); 291 goto bail; 292 } 293 294 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 295 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 296 thash); 297 298 if (cse == NULL) { 299 DPRINTF(("csecreate failed\n")); 300 crypto_freesession(sid); 301 error = EINVAL; 302 goto bail; 303 } 304 sop->ses = cse->ses; 305 306 bail: 307 if (error) { 308 if (crie.cri_key) 309 FREE(crie.cri_key, M_XDATA); 310 if (cria.cri_key) 311 FREE(cria.cri_key, M_XDATA); 312 } 313 break; 314 case CIOCFSESSION: 315 ses = *(u_int32_t *)data; 316 cse = csefind(fcr, ses); 317 if (cse == NULL) 318 return (EINVAL); 319 csedelete(fcr, cse); 320 error = csefree(cse); 321 break; 322 case CIOCCRYPT: 323 cop = (struct crypt_op *)data; 324 cse = csefind(fcr, cop->ses); 325 if (cse == NULL) { 326 DPRINTF(("csefind failed\n")); 327 return (EINVAL); 328 } 329 error = cryptodev_op(cse, cop, l); 330 break; 331 case CIOCKEY: 332 error = cryptodev_key((struct crypt_kop *)data); 333 break; 334 case CIOCASYMFEAT: 335 error = crypto_getfeat((int *)data); 336 break; 337 default: 338 DPRINTF(("invalid ioctl cmd %ld\n", cmd)); 339 error = EINVAL; 340 } 341 return (error); 342 } 343 344 static int 345 cryptodev_op(struct csession *cse, struct crypt_op *cop, struct lwp *l) 346 { 347 struct cryptop *crp = NULL; 348 struct cryptodesc *crde = NULL, *crda = NULL; 349 int i, error, s; 350 351 if (cop->len > 256*1024-4) 352 return (E2BIG); 353 354 if (cse->txform) { 355 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 356 return (EINVAL); 357 } 358 359 bzero(&cse->uio, sizeof(cse->uio)); 360 cse->uio.uio_iovcnt = 1; 361 cse->uio.uio_resid = 0; 362 cse->uio.uio_rw = UIO_WRITE; 363 cse->uio.uio_iov = cse->iovec; 364 UIO_SETUP_SYSSPACE(&cse->uio); 365 bzero(&cse->iovec, sizeof(cse->iovec)); 366 cse->uio.uio_iov[0].iov_len = cop->len; 367 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 368 for (i = 0; i < cse->uio.uio_iovcnt; i++) 369 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len; 370 371 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 372 if (crp == NULL) { 373 error = ENOMEM; 374 goto bail; 375 } 376 377 if (cse->thash) { 378 crda = crp->crp_desc; 379 if (cse->txform) 380 crde = crda->crd_next; 381 } else { 382 if (cse->txform) 383 crde = crp->crp_desc; 384 else { 385 error = EINVAL; 386 goto bail; 387 } 388 } 389 390 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 391 goto bail; 392 393 if (crda) { 394 crda->crd_skip = 0; 395 crda->crd_len = cop->len; 396 crda->crd_inject = 0; /* ??? */ 397 398 crda->crd_alg = cse->mac; 399 crda->crd_key = cse->mackey; 400 crda->crd_klen = cse->mackeylen * 8; 401 } 402 403 if (crde) { 404 if (cop->op == COP_ENCRYPT) 405 crde->crd_flags |= CRD_F_ENCRYPT; 406 else 407 crde->crd_flags &= ~CRD_F_ENCRYPT; 408 crde->crd_len = cop->len; 409 crde->crd_inject = 0; 410 411 crde->crd_alg = cse->cipher; 412 crde->crd_key = cse->key; 413 crde->crd_klen = cse->keylen * 8; 414 } 415 416 crp->crp_ilen = cop->len; 417 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 418 | (cop->flags & COP_F_BATCH); 419 crp->crp_buf = (caddr_t)&cse->uio; 420 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 421 crp->crp_sid = cse->sid; 422 crp->crp_opaque = (void *)cse; 423 424 if (cop->iv) { 425 if (crde == NULL) { 426 error = EINVAL; 427 goto bail; 428 } 429 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 430 error = EINVAL; 431 goto bail; 432 } 433 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 434 goto bail; 435 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 436 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 437 crde->crd_skip = 0; 438 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 439 crde->crd_skip = 0; 440 } else if (crde) { 441 crde->crd_flags |= CRD_F_IV_PRESENT; 442 crde->crd_skip = cse->txform->blocksize; 443 crde->crd_len -= cse->txform->blocksize; 444 } 445 446 if (cop->mac) { 447 if (crda == NULL) { 448 error = EINVAL; 449 goto bail; 450 } 451 crp->crp_mac=cse->tmp_mac; 452 } 453 454 s = splcrypto(); /* NB: only needed with CRYPTO_F_CBIMM */ 455 error = crypto_dispatch(crp); 456 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 457 error = tsleep(crp, PSOCK, "crydev", 0); 458 splx(s); 459 if (error) { 460 goto bail; 461 } 462 463 if (crp->crp_etype != 0) { 464 error = crp->crp_etype; 465 goto bail; 466 } 467 468 if (cse->error) { 469 error = cse->error; 470 goto bail; 471 } 472 473 if (cop->dst && 474 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 475 goto bail; 476 477 if (cop->mac && 478 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 479 goto bail; 480 481 bail: 482 if (crp) 483 crypto_freereq(crp); 484 if (cse->uio.uio_iov[0].iov_base) 485 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 486 487 return (error); 488 } 489 490 static int 491 cryptodev_cb(void *op) 492 { 493 struct cryptop *crp = (struct cryptop *) op; 494 struct csession *cse = (struct csession *)crp->crp_opaque; 495 496 cse->error = crp->crp_etype; 497 if (crp->crp_etype == EAGAIN) 498 return crypto_dispatch(crp); 499 wakeup_one(crp); 500 return (0); 501 } 502 503 static int 504 cryptodevkey_cb(void *op) 505 { 506 struct cryptkop *krp = (struct cryptkop *) op; 507 508 wakeup_one(krp); 509 return (0); 510 } 511 512 static int 513 cryptodev_key(struct crypt_kop *kop) 514 { 515 struct cryptkop *krp = NULL; 516 int error = EINVAL; 517 int in, out, size, i; 518 519 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 520 return (EFBIG); 521 } 522 523 in = kop->crk_iparams; 524 out = kop->crk_oparams; 525 switch (kop->crk_op) { 526 case CRK_MOD_EXP: 527 if (in == 3 && out == 1) 528 break; 529 return (EINVAL); 530 case CRK_MOD_EXP_CRT: 531 if (in == 6 && out == 1) 532 break; 533 return (EINVAL); 534 case CRK_DSA_SIGN: 535 if (in == 5 && out == 2) 536 break; 537 return (EINVAL); 538 case CRK_DSA_VERIFY: 539 if (in == 7 && out == 0) 540 break; 541 return (EINVAL); 542 case CRK_DH_COMPUTE_KEY: 543 if (in == 3 && out == 1) 544 break; 545 return (EINVAL); 546 default: 547 return (EINVAL); 548 } 549 550 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 551 if (!krp) 552 return (ENOMEM); 553 bzero(krp, sizeof *krp); 554 krp->krp_op = kop->crk_op; 555 krp->krp_status = kop->crk_status; 556 krp->krp_iparams = kop->crk_iparams; 557 krp->krp_oparams = kop->crk_oparams; 558 krp->krp_status = 0; 559 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 560 561 for (i = 0; i < CRK_MAXPARAM; i++) 562 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 563 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 564 size = (krp->krp_param[i].crp_nbits + 7) / 8; 565 if (size == 0) 566 continue; 567 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 568 if (i >= krp->krp_iparams) 569 continue; 570 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 571 if (error) 572 goto fail; 573 } 574 575 error = crypto_kdispatch(krp); 576 if (error == 0) 577 error = tsleep(krp, PSOCK, "crydev", 0); 578 if (error) 579 goto fail; 580 581 if (krp->krp_status != 0) { 582 error = krp->krp_status; 583 goto fail; 584 } 585 586 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 587 size = (krp->krp_param[i].crp_nbits + 7) / 8; 588 if (size == 0) 589 continue; 590 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 591 if (error) 592 goto fail; 593 } 594 595 fail: 596 if (krp) { 597 kop->crk_status = krp->krp_status; 598 for (i = 0; i < CRK_MAXPARAM; i++) { 599 if (krp->krp_param[i].crp_p) 600 FREE(krp->krp_param[i].crp_p, M_XDATA); 601 } 602 free(krp, M_XDATA); 603 } 604 return (error); 605 } 606 607 /* ARGSUSED */ 608 static int 609 cryptof_close(struct file *fp, struct lwp *l) 610 { 611 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 612 struct csession *cse; 613 614 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 615 TAILQ_REMOVE(&fcr->csessions, cse, next); 616 (void)csefree(cse); 617 } 618 FREE(fcr, M_XDATA); 619 620 /* close() stolen from sys/kern/kern_ktrace.c */ 621 622 fp->f_data = NULL; 623 #if 0 624 FILE_UNUSE(fp, l); /* release file */ 625 fdrelease(l, fd); /* release fd table slot */ 626 #endif 627 628 return 0; 629 } 630 631 static struct csession * 632 csefind(struct fcrypt *fcr, u_int ses) 633 { 634 struct csession *cse; 635 636 TAILQ_FOREACH(cse, &fcr->csessions, next) 637 if (cse->ses == ses) 638 return (cse); 639 return (NULL); 640 } 641 642 static int 643 csedelete(struct fcrypt *fcr, struct csession *cse_del) 644 { 645 struct csession *cse; 646 647 TAILQ_FOREACH(cse, &fcr->csessions, next) { 648 if (cse == cse_del) { 649 TAILQ_REMOVE(&fcr->csessions, cse, next); 650 return (1); 651 } 652 } 653 return (0); 654 } 655 656 static struct csession * 657 cseadd(struct fcrypt *fcr, struct csession *cse) 658 { 659 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 660 cse->ses = fcr->sesn++; 661 return (cse); 662 } 663 664 static struct csession * 665 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 666 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 667 struct enc_xform *txform, struct auth_hash *thash) 668 { 669 struct csession *cse; 670 671 MALLOC(cse, struct csession *, sizeof(struct csession), 672 M_XDATA, M_NOWAIT); 673 if (cse == NULL) 674 return NULL; 675 cse->key = key; 676 cse->keylen = keylen/8; 677 cse->mackey = mackey; 678 cse->mackeylen = mackeylen/8; 679 cse->sid = sid; 680 cse->cipher = cipher; 681 cse->mac = mac; 682 cse->txform = txform; 683 cse->thash = thash; 684 cseadd(fcr, cse); 685 return (cse); 686 } 687 688 static int 689 csefree(struct csession *cse) 690 { 691 int error; 692 693 error = crypto_freesession(cse->sid); 694 if (cse->key) 695 FREE(cse->key, M_XDATA); 696 if (cse->mackey) 697 FREE(cse->mackey, M_XDATA); 698 FREE(cse, M_XDATA); 699 return (error); 700 } 701 702 static int 703 cryptoopen(dev_t dev, int flag, int mode, struct lwp *l) 704 { 705 if (crypto_usercrypto == 0) 706 return (ENXIO); 707 return (0); 708 } 709 710 static int 711 cryptoread(dev_t dev, struct uio *uio, int ioflag) 712 { 713 return (EIO); 714 } 715 716 static int 717 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 718 { 719 return (EIO); 720 } 721 722 static int 723 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 724 { 725 struct file *f; 726 struct fcrypt *fcr; 727 int fd, error; 728 729 switch (cmd) { 730 case CRIOGET: 731 MALLOC(fcr, struct fcrypt *, 732 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 733 TAILQ_INIT(&fcr->csessions); 734 fcr->sesn = 0; 735 736 error = falloc(l->l_proc, &f, &fd); 737 if (error) { 738 FREE(fcr, M_XDATA); 739 return (error); 740 } 741 f->f_flag = FREAD | FWRITE; 742 f->f_type = DTYPE_CRYPTO; 743 f->f_ops = &cryptofops; 744 f->f_data = (caddr_t) fcr; 745 *(u_int32_t *)data = fd; 746 FILE_SET_MATURE(f); 747 FILE_UNUSE(f, l); 748 break; 749 default: 750 error = EINVAL; 751 break; 752 } 753 return (error); 754 } 755 756 int 757 cryptoselect(dev_t dev, int rw, struct lwp *l) 758 { 759 return (0); 760 } 761 762 /*static*/ 763 struct cdevsw crypto_cdevsw = { 764 /* open */ cryptoopen, 765 /* close */ nullclose, 766 /* read */ cryptoread, 767 /* write */ cryptowrite, 768 /* ioctl */ cryptoioctl, 769 /* ttstop?*/ nostop, 770 /* ??*/ notty, 771 /* poll */ cryptoselect /*nopoll*/, 772 /* mmap */ nommap, 773 /* kqfilter */ nokqfilter, 774 }; 775 776 #ifdef __NetBSD__ 777 /* 778 * Pseudo-device initialization routine for /dev/crypto 779 */ 780 void cryptoattach(int); 781 782 void 783 cryptoattach(int num) 784 { 785 786 /* nothing to do */ 787 } 788 #endif /* __NetBSD__ */ 789
Indexes created Fri Sep 26 08:10:20 GMT 2025