cryptodev.c revision 1.8
1 /* $NetBSD: cryptodev.c,v 1.8 2003/11/16 00:16:06 jonathan 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 1.8 2003/11/16 00:16:06 jonathan 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 60 struct csession { 61 TAILQ_ENTRY(csession) next; 62 u_int64_t sid; 63 u_int32_t ses; 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 u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; 77 78 struct iovec iovec[IOV_MAX]; 79 struct uio uio; 80 int error; 81 }; 82 83 struct fcrypt { 84 TAILQ_HEAD(csessionlist, csession) csessions; 85 int sesn; 86 }; 87 88 89 /* Declaration of master device (fd-cloning/ctxt-allocating) entrypoints */ 90 static int cryptoopen(dev_t dev, int flag, int mode, struct proc *p); 91 static int cryptoread(dev_t dev, struct uio *uio, int ioflag); 92 static int cryptowrite(dev_t dev, struct uio *uio, int ioflag); 93 static int cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p); 94 static int cryptoselect(dev_t dev, int rw, struct proc *p); 95 96 /* Declaration of cloned-device (per-ctxt) entrypoints */ 97 static int cryptof_read(struct file *, off_t *, struct uio *, struct ucred *, int); 98 static int cryptof_write(struct file *, off_t *, struct uio *, struct ucred *, int); 99 static int cryptof_ioctl(struct file *, u_long, void*, struct proc *p); 100 static int cryptof_fcntl(struct file *, u_int, void*, struct proc *p); 101 static int cryptof_poll(struct file *, int, struct proc *); 102 static int cryptof_kqfilter(struct file *, struct knote *); 103 static int cryptof_stat(struct file *, struct stat *, struct proc *); 104 static int cryptof_close(struct file *, struct proc *); 105 106 static struct fileops cryptofops = { 107 cryptof_read, 108 cryptof_write, 109 cryptof_ioctl, 110 cryptof_fcntl, 111 cryptof_poll, 112 cryptof_stat, 113 cryptof_close, 114 cryptof_kqfilter 115 }; 116 117 static struct csession *csefind(struct fcrypt *, u_int); 118 static int csedelete(struct fcrypt *, struct csession *); 119 static struct csession *cseadd(struct fcrypt *, struct csession *); 120 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, u_int64_t, 121 caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 122 struct auth_hash *); 123 static int csefree(struct csession *); 124 125 static int cryptodev_op(struct csession *, struct crypt_op *, struct proc *); 126 static int cryptodev_key(struct crypt_kop *); 127 int cryptodev_dokey(struct crypt_kop *kop, struct crparam kvp[]); 128 129 static int cryptodev_cb(void *); 130 static int cryptodevkey_cb(void *); 131 132 int usercrypto = 1; /* userland may do crypto requests */ 133 int userasymcrypto = 1; /* userland may do asymmetric crypto reqs */ 134 int cryptodevallowsoft = 1; /* only use hardware crypto */ 135 136 /* ARGSUSED */ 137 int 138 cryptof_read(struct file *fp, off_t *poff, struct uio *uio, 139 struct ucred *cred, int flags) 140 { 141 return (EIO); 142 } 143 144 /* ARGSUSED */ 145 int 146 cryptof_write(struct file *fp, off_t *poff, struct uio *uio, 147 struct ucred *cred, int flags) 148 { 149 return (EIO); 150 } 151 152 /* ARGSUSED */ 153 int 154 cryptof_ioctl(struct file *fp, u_long cmd, void* data, struct proc *p) 155 { 156 struct cryptoini cria, crie; 157 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 158 struct csession *cse; 159 struct session_op *sop; 160 struct crypt_op *cop; 161 struct enc_xform *txform = NULL; 162 struct auth_hash *thash = NULL; 163 u_int64_t sid; 164 u_int32_t ses; 165 int error = 0; 166 167 switch (cmd) { 168 case CIOCGSESSION: 169 sop = (struct session_op *)data; 170 switch (sop->cipher) { 171 case 0: 172 break; 173 case CRYPTO_DES_CBC: 174 txform = &enc_xform_des; 175 break; 176 case CRYPTO_3DES_CBC: 177 txform = &enc_xform_3des; 178 break; 179 case CRYPTO_BLF_CBC: 180 txform = &enc_xform_blf; 181 break; 182 case CRYPTO_CAST_CBC: 183 txform = &enc_xform_cast5; 184 break; 185 case CRYPTO_SKIPJACK_CBC: 186 txform = &enc_xform_skipjack; 187 break; 188 case CRYPTO_AES_CBC: 189 txform = &enc_xform_rijndael128; 190 break; 191 case CRYPTO_NULL_CBC: 192 txform = &enc_xform_null; 193 break; 194 case CRYPTO_ARC4: 195 txform = &enc_xform_arc4; 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_96; 206 break; 207 case CRYPTO_SHA1_HMAC: 208 thash = &auth_hash_hmac_sha1_96; 209 break; 210 case CRYPTO_SHA2_HMAC: 211 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 212 thash = &auth_hash_hmac_sha2_256; 213 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 214 thash = &auth_hash_hmac_sha2_384; 215 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 216 thash = &auth_hash_hmac_sha2_512; 217 else 218 return (EINVAL); 219 break; 220 case CRYPTO_RIPEMD160_HMAC: 221 thash = &auth_hash_hmac_ripemd_160_96; 222 break; 223 case CRYPTO_MD5: 224 thash = &auth_hash_md5; 225 break; 226 case CRYPTO_SHA1: 227 thash = &auth_hash_sha1; 228 break; 229 case CRYPTO_NULL_HMAC: 230 thash = &auth_hash_null; 231 break; 232 default: 233 return (EINVAL); 234 } 235 236 bzero(&crie, sizeof(crie)); 237 bzero(&cria, sizeof(cria)); 238 239 if (txform) { 240 crie.cri_alg = txform->type; 241 crie.cri_klen = sop->keylen * 8; 242 if (sop->keylen > txform->maxkey || 243 sop->keylen < txform->minkey) { 244 error = EINVAL; 245 goto bail; 246 } 247 248 MALLOC(crie.cri_key, u_int8_t *, 249 crie.cri_klen / 8, M_XDATA, M_WAITOK); 250 if ((error = copyin(sop->key, crie.cri_key, 251 crie.cri_klen / 8))) 252 goto bail; 253 if (thash) 254 crie.cri_next = &cria; 255 } 256 257 if (thash) { 258 cria.cri_alg = thash->type; 259 cria.cri_klen = sop->mackeylen * 8; 260 if (sop->mackeylen != thash->keysize) { 261 error = EINVAL; 262 goto bail; 263 } 264 265 if (cria.cri_klen) { 266 MALLOC(cria.cri_key, u_int8_t *, 267 cria.cri_klen / 8, M_XDATA, M_WAITOK); 268 if ((error = copyin(sop->mackey, cria.cri_key, 269 cria.cri_klen / 8))) 270 goto bail; 271 } 272 } 273 274 error = crypto_newsession(&sid, (txform ? &crie : &cria), 275 0); 276 if (error) { 277 /* this is an auditable security event? */ 278 printf("SIOCSESSION violates kernel parameters\n"); 279 goto bail; 280 } 281 282 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 283 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 284 thash); 285 286 if (cse == NULL) { 287 crypto_freesession(sid); 288 error = EINVAL; 289 goto bail; 290 } 291 sop->ses = cse->ses; 292 293 bail: 294 if (error) { 295 if (crie.cri_key) 296 FREE(crie.cri_key, M_XDATA); 297 if (cria.cri_key) 298 FREE(cria.cri_key, M_XDATA); 299 } 300 break; 301 case CIOCFSESSION: 302 ses = *(u_int32_t *)data; 303 cse = csefind(fcr, ses); 304 if (cse == NULL) 305 return (EINVAL); 306 csedelete(fcr, cse); 307 error = csefree(cse); 308 break; 309 case CIOCCRYPT: 310 cop = (struct crypt_op *)data; 311 cse = csefind(fcr, cop->ses); 312 if (cse == NULL) 313 return (EINVAL); 314 error = cryptodev_op(cse, cop, p); 315 break; 316 case CIOCKEY: 317 error = cryptodev_key((struct crypt_kop *)data); 318 break; 319 case CIOCASYMFEAT: 320 error = crypto_getfeat((int *)data); 321 break; 322 default: 323 error = EINVAL; 324 } 325 return (error); 326 } 327 328 /* ARGSUSED */ 329 int 330 cryptof_fcntl(struct file *fp, u_int cmd, void *data, struct proc *p) 331 { 332 return (0); 333 } 334 335 static int 336 cryptodev_op(struct csession *cse, struct crypt_op *cop, struct proc *p) 337 { 338 struct cryptop *crp = NULL; 339 struct cryptodesc *crde = NULL, *crda = NULL; 340 int i, error, s; 341 342 if (cop->len > 256*1024-4) 343 return (E2BIG); 344 345 if (cse->txform && (cop->len % cse->txform->blocksize) != 0) 346 return (EINVAL); 347 348 bzero(&cse->uio, sizeof(cse->uio)); 349 cse->uio.uio_iovcnt = 1; 350 cse->uio.uio_resid = 0; 351 cse->uio.uio_segflg = UIO_SYSSPACE; 352 cse->uio.uio_rw = UIO_WRITE; 353 cse->uio.uio_procp = p; 354 cse->uio.uio_iov = cse->iovec; 355 bzero(&cse->iovec, sizeof(cse->iovec)); 356 cse->uio.uio_iov[0].iov_len = cop->len; 357 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 358 for (i = 0; i < cse->uio.uio_iovcnt; i++) 359 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len; 360 361 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 362 if (crp == NULL) { 363 error = ENOMEM; 364 goto bail; 365 } 366 367 if (cse->thash) { 368 crda = crp->crp_desc; 369 if (cse->txform) 370 crde = crda->crd_next; 371 } else { 372 if (cse->txform) 373 crde = crp->crp_desc; 374 else { 375 error = EINVAL; 376 goto bail; 377 } 378 } 379 380 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 381 goto bail; 382 383 if (crda) { 384 crda->crd_skip = 0; 385 crda->crd_len = cop->len; 386 crda->crd_inject = 0; /* ??? */ 387 388 crda->crd_alg = cse->mac; 389 crda->crd_key = cse->mackey; 390 crda->crd_klen = cse->mackeylen * 8; 391 } 392 393 if (crde) { 394 if (cop->op == COP_ENCRYPT) 395 crde->crd_flags |= CRD_F_ENCRYPT; 396 else 397 crde->crd_flags &= ~CRD_F_ENCRYPT; 398 crde->crd_len = cop->len; 399 crde->crd_inject = 0; 400 401 crde->crd_alg = cse->cipher; 402 crde->crd_key = cse->key; 403 crde->crd_klen = cse->keylen * 8; 404 } 405 406 crp->crp_ilen = cop->len; 407 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 408 | (cop->flags & COP_F_BATCH); 409 crp->crp_buf = (caddr_t)&cse->uio; 410 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 411 crp->crp_sid = cse->sid; 412 crp->crp_opaque = (void *)cse; 413 414 if (cop->iv) { 415 if (crde == NULL) { 416 error = EINVAL; 417 goto bail; 418 } 419 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 420 error = EINVAL; 421 goto bail; 422 } 423 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 424 goto bail; 425 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 426 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 427 crde->crd_skip = 0; 428 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 429 crde->crd_skip = 0; 430 } else if (crde) { 431 crde->crd_flags |= CRD_F_IV_PRESENT; 432 crde->crd_skip = cse->txform->blocksize; 433 crde->crd_len -= cse->txform->blocksize; 434 } 435 436 if (cop->mac) { 437 if (crda == NULL) { 438 error = EINVAL; 439 goto bail; 440 } 441 crp->crp_mac=cse->tmp_mac; 442 } 443 444 s = splcrypto(); /* NB: only needed with CRYPTO_F_CBIMM */ 445 error = crypto_dispatch(crp); 446 if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 447 error = tsleep(crp, PSOCK, "crydev", 0); 448 splx(s); 449 if (error) { 450 goto bail; 451 } 452 453 if (crp->crp_etype != 0) { 454 error = crp->crp_etype; 455 goto bail; 456 } 457 458 if (cse->error) { 459 error = cse->error; 460 goto bail; 461 } 462 463 if (cop->dst && 464 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 465 goto bail; 466 467 if (cop->mac && 468 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 469 goto bail; 470 471 bail: 472 if (crp) 473 crypto_freereq(crp); 474 if (cse->uio.uio_iov[0].iov_base) 475 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 476 477 return (error); 478 } 479 480 static int 481 cryptodev_cb(void *op) 482 { 483 struct cryptop *crp = (struct cryptop *) op; 484 struct csession *cse = (struct csession *)crp->crp_opaque; 485 486 cse->error = crp->crp_etype; 487 if (crp->crp_etype == EAGAIN) 488 return crypto_dispatch(crp); 489 wakeup_one(crp); 490 return (0); 491 } 492 493 static int 494 cryptodevkey_cb(void *op) 495 { 496 struct cryptkop *krp = (struct cryptkop *) op; 497 498 wakeup_one(krp); 499 return (0); 500 } 501 502 static int 503 cryptodev_key(struct crypt_kop *kop) 504 { 505 struct cryptkop *krp = NULL; 506 int error = EINVAL; 507 int in, out, size, i; 508 509 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 510 return (EFBIG); 511 } 512 513 in = kop->crk_iparams; 514 out = kop->crk_oparams; 515 switch (kop->crk_op) { 516 case CRK_MOD_EXP: 517 if (in == 3 && out == 1) 518 break; 519 return (EINVAL); 520 case CRK_MOD_EXP_CRT: 521 if (in == 6 && out == 1) 522 break; 523 return (EINVAL); 524 case CRK_DSA_SIGN: 525 if (in == 5 && out == 2) 526 break; 527 return (EINVAL); 528 case CRK_DSA_VERIFY: 529 if (in == 7 && out == 0) 530 break; 531 return (EINVAL); 532 case CRK_DH_COMPUTE_KEY: 533 if (in == 3 && out == 1) 534 break; 535 return (EINVAL); 536 default: 537 return (EINVAL); 538 } 539 540 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 541 if (!krp) 542 return (ENOMEM); 543 bzero(krp, sizeof *krp); 544 krp->krp_op = kop->crk_op; 545 krp->krp_status = kop->crk_status; 546 krp->krp_iparams = kop->crk_iparams; 547 krp->krp_oparams = kop->crk_oparams; 548 krp->krp_status = 0; 549 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 550 551 for (i = 0; i < CRK_MAXPARAM; i++) 552 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 553 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 554 size = (krp->krp_param[i].crp_nbits + 7) / 8; 555 if (size == 0) 556 continue; 557 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 558 if (i >= krp->krp_iparams) 559 continue; 560 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 561 if (error) 562 goto fail; 563 } 564 565 error = crypto_kdispatch(krp); 566 if (error == 0) 567 error = tsleep(krp, PSOCK, "crydev", 0); 568 if (error) 569 goto fail; 570 571 if (krp->krp_status != 0) { 572 error = krp->krp_status; 573 goto fail; 574 } 575 576 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 577 size = (krp->krp_param[i].crp_nbits + 7) / 8; 578 if (size == 0) 579 continue; 580 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 581 if (error) 582 goto fail; 583 } 584 585 fail: 586 if (krp) { 587 kop->crk_status = krp->krp_status; 588 for (i = 0; i < CRK_MAXPARAM; i++) { 589 if (krp->krp_param[i].crp_p) 590 FREE(krp->krp_param[i].crp_p, M_XDATA); 591 } 592 free(krp, M_XDATA); 593 } 594 return (error); 595 } 596 597 /* ARGSUSED */ 598 static int 599 cryptof_poll(struct file *fp, int which, struct proc *p) 600 { 601 return (0); 602 } 603 604 605 /* ARGSUSED */ 606 static int 607 cryptof_kqfilter(struct file *fp, struct knote *kn) 608 { 609 610 return (0); 611 } 612 613 /* ARGSUSED */ 614 static int 615 cryptof_stat(struct file *fp, struct stat *sb, struct proc *p) 616 { 617 return (EOPNOTSUPP); 618 } 619 620 /* ARGSUSED */ 621 static int 622 cryptof_close(struct file *fp, struct proc *p) 623 { 624 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 625 struct csession *cse; 626 627 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 628 TAILQ_REMOVE(&fcr->csessions, cse, next); 629 (void)csefree(cse); 630 } 631 FREE(fcr, M_XDATA); 632 633 /* close() stolen from sys/kern/kern_ktrace.c */ 634 635 fp->f_data = NULL; 636 #if 0 637 FILE_UNUSE(fp, p); /* release file */ 638 fdrelease(p, fd); /* release fd table slot */ 639 #endif 640 641 return 0; 642 } 643 644 static struct csession * 645 csefind(struct fcrypt *fcr, u_int ses) 646 { 647 struct csession *cse; 648 649 TAILQ_FOREACH(cse, &fcr->csessions, next) 650 if (cse->ses == ses) 651 return (cse); 652 return (NULL); 653 } 654 655 static int 656 csedelete(struct fcrypt *fcr, struct csession *cse_del) 657 { 658 struct csession *cse; 659 660 TAILQ_FOREACH(cse, &fcr->csessions, next) { 661 if (cse == cse_del) { 662 TAILQ_REMOVE(&fcr->csessions, cse, next); 663 return (1); 664 } 665 } 666 return (0); 667 } 668 669 static struct csession * 670 cseadd(struct fcrypt *fcr, struct csession *cse) 671 { 672 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 673 cse->ses = fcr->sesn++; 674 return (cse); 675 } 676 677 static struct csession * 678 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 679 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 680 struct enc_xform *txform, struct auth_hash *thash) 681 { 682 struct csession *cse; 683 684 MALLOC(cse, struct csession *, sizeof(struct csession), 685 M_XDATA, M_NOWAIT); 686 if (cse == NULL) 687 return NULL; 688 cse->key = key; 689 cse->keylen = keylen/8; 690 cse->mackey = mackey; 691 cse->mackeylen = mackeylen/8; 692 cse->sid = sid; 693 cse->cipher = cipher; 694 cse->mac = mac; 695 cse->txform = txform; 696 cse->thash = thash; 697 cseadd(fcr, cse); 698 return (cse); 699 } 700 701 static int 702 csefree(struct csession *cse) 703 { 704 int error; 705 706 error = crypto_freesession(cse->sid); 707 if (cse->key) 708 FREE(cse->key, M_XDATA); 709 if (cse->mackey) 710 FREE(cse->mackey, M_XDATA); 711 FREE(cse, M_XDATA); 712 return (error); 713 } 714 715 static int 716 cryptoopen(dev_t dev, int flag, int mode, struct proc *p) 717 { 718 if (crypto_usercrypto == 0) 719 return (ENXIO); 720 return (0); 721 } 722 723 static int 724 cryptoread(dev_t dev, struct uio *uio, int ioflag) 725 { 726 return (EIO); 727 } 728 729 static int 730 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 731 { 732 return (EIO); 733 } 734 735 static int 736 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 737 { 738 struct file *f; 739 struct fcrypt *fcr; 740 int fd, error; 741 742 switch (cmd) { 743 case CRIOGET: 744 MALLOC(fcr, struct fcrypt *, 745 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 746 TAILQ_INIT(&fcr->csessions); 747 fcr->sesn = 0; 748 749 error = falloc(p, &f, &fd); 750 if (error) { 751 FREE(fcr, M_XDATA); 752 return (error); 753 } 754 f->f_flag = FREAD | FWRITE; 755 f->f_type = DTYPE_CRYPTO; 756 f->f_ops = &cryptofops; 757 f->f_data = (caddr_t) fcr; 758 *(u_int32_t *)data = fd; 759 FILE_SET_MATURE(f); 760 FILE_UNUSE(f, p); 761 break; 762 default: 763 error = EINVAL; 764 break; 765 } 766 return (error); 767 } 768 769 int 770 cryptoselect(dev_t dev, int rw, struct proc *p) 771 { 772 return (0); 773 } 774 775 /*static*/ 776 struct cdevsw crypto_cdevsw = { 777 /* open */ cryptoopen, 778 /* close */ nullclose, 779 /* read */ cryptoread, 780 /* write */ cryptowrite, 781 /* ioctl */ cryptoioctl, 782 /* ttstop?*/ nostop, 783 /* ??*/ notty, 784 /* poll */ cryptoselect /*nopoll*/, 785 /* mmap */ nommap, 786 /* kqfilter */ nokqfilter, 787 }; 788 789
Indexes created Thu Oct 02 14:10:14 GMT 2025