cryptodev.c revision 1.3
1 /* $NetBSD: cryptodev.c,v 1.3 2003/07/30 18:20:15 jonathan Exp $ */ 2 /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.3 2003/02/26 00:14:05 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 1.3 2003/07/30 18:20:15 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/rmd160.h> 54 #include <opencrypto/cast.h> 55 #include <opencrypto/skipjack.h> 56 #include <opencrypto/blf.h> 57 #include <opencrypto/cryptodev.h> 58 #include <opencrypto/xform.h> 59 60 #ifdef __NetBSD__ 61 #define splcrypto splnet 62 #endif 63 64 struct csession { 65 TAILQ_ENTRY(csession) next; 66 u_int64_t sid; 67 u_int32_t ses; 68 69 u_int32_t cipher; 70 struct enc_xform *txform; 71 u_int32_t mac; 72 struct auth_hash *thash; 73 74 caddr_t key; 75 int keylen; 76 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 77 78 caddr_t mackey; 79 int mackeylen; 80 u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; 81 82 struct iovec iovec[IOV_MAX]; 83 struct uio uio; 84 int error; 85 }; 86 87 struct fcrypt { 88 TAILQ_HEAD(csessionlist, csession) csessions; 89 int sesn; 90 }; 91 92 93 /* Declaration of master device (fd-cloning/ctxt-allocating) entrypoints */ 94 static int cryptoopen(dev_t dev, int flag, int mode, struct proc *p); 95 static int cryptoread(dev_t dev, struct uio *uio, int ioflag); 96 static int cryptowrite(dev_t dev, struct uio *uio, int ioflag); 97 static int cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p); 98 static int cryptoselect(dev_t dev, int rw, struct proc *p); 99 100 /* Declaration of cloned-device (per-ctxt) entrypoints */ 101 static int cryptof_read(struct file *, off_t *, struct uio *, struct ucred *, int); 102 static int cryptof_write(struct file *, off_t *, struct uio *, struct ucred *, int); 103 static int cryptof_ioctl(struct file *, u_long, void*, struct proc *p); 104 static int cryptof_fcntl(struct file *, u_int, void*, struct proc *p); 105 static int cryptof_poll(struct file *, int, struct proc *); 106 static int cryptof_kqfilter(struct file *, struct knote *); 107 static int cryptof_stat(struct file *, struct stat *, struct proc *); 108 static int cryptof_close(struct file *, struct proc *); 109 110 static struct fileops cryptofops = { 111 cryptof_read, 112 cryptof_write, 113 cryptof_ioctl, 114 cryptof_fcntl, 115 cryptof_poll, 116 cryptof_stat, 117 cryptof_close, 118 cryptof_kqfilter 119 }; 120 121 static struct csession *csefind(struct fcrypt *, u_int); 122 static int csedelete(struct fcrypt *, struct csession *); 123 static struct csession *cseadd(struct fcrypt *, struct csession *); 124 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, u_int64_t, 125 caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 126 struct auth_hash *); 127 static int csefree(struct csession *); 128 129 static int cryptodev_op(struct csession *, struct crypt_op *, struct proc *); 130 static int cryptodev_key(struct crypt_kop *); 131 int cryptodev_dokey(struct crypt_kop *kop, struct crparam kvp[]); 132 133 static int cryptodev_cb(void *); 134 static int cryptodevkey_cb(void *); 135 136 int usercrypto = 1; /* userland may do crypto requests */ 137 int userasymcrypto = 1; /* userland may do asymmetric crypto reqs */ 138 int cryptodevallowsoft = 1; /* only use hardware crypto */ 139 140 /* ARGSUSED */ 141 int 142 cryptof_read(struct file *fp, off_t *poff, struct uio *uio, 143 struct ucred *cred, int flags) 144 { 145 return (EIO); 146 } 147 148 /* ARGSUSED */ 149 int 150 cryptof_write(struct file *fp, off_t *poff, struct uio *uio, 151 struct ucred *cred, int flags) 152 { 153 return (EIO); 154 } 155 156 /* ARGSUSED */ 157 int 158 cryptof_ioctl(struct file *fp, u_long cmd, void* data, struct proc *p) 159 { 160 struct cryptoini cria, crie; 161 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 162 struct csession *cse; 163 struct session_op *sop; 164 struct crypt_op *cop; 165 struct enc_xform *txform = NULL; 166 struct auth_hash *thash = NULL; 167 u_int64_t sid; 168 u_int32_t ses; 169 int error = 0; 170 171 switch (cmd) { 172 case CIOCGSESSION: 173 sop = (struct session_op *)data; 174 switch (sop->cipher) { 175 case 0: 176 break; 177 case CRYPTO_DES_CBC: 178 txform = &enc_xform_des; 179 break; 180 case CRYPTO_3DES_CBC: 181 txform = &enc_xform_3des; 182 break; 183 case CRYPTO_BLF_CBC: 184 txform = &enc_xform_blf; 185 break; 186 case CRYPTO_CAST_CBC: 187 txform = &enc_xform_cast5; 188 break; 189 case CRYPTO_SKIPJACK_CBC: 190 txform = &enc_xform_skipjack; 191 break; 192 case CRYPTO_AES_CBC: 193 txform = &enc_xform_rijndael128; 194 break; 195 case CRYPTO_NULL_CBC: 196 txform = &enc_xform_null; 197 break; 198 case CRYPTO_ARC4: 199 txform = &enc_xform_arc4; 200 break; 201 default: 202 return (EINVAL); 203 } 204 205 switch (sop->mac) { 206 case 0: 207 break; 208 case CRYPTO_MD5_HMAC: 209 thash = &auth_hash_hmac_md5_96; 210 break; 211 case CRYPTO_SHA1_HMAC: 212 thash = &auth_hash_hmac_sha1_96; 213 break; 214 case CRYPTO_SHA2_HMAC: 215 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 216 thash = &auth_hash_hmac_sha2_256; 217 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 218 thash = &auth_hash_hmac_sha2_384; 219 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 220 thash = &auth_hash_hmac_sha2_512; 221 else 222 return (EINVAL); 223 break; 224 case CRYPTO_RIPEMD160_HMAC: 225 thash = &auth_hash_hmac_ripemd_160_96; 226 break; 227 #ifdef notdef 228 case CRYPTO_MD5: 229 thash = &auth_hash_md5; 230 break; 231 case CRYPTO_SHA1: 232 thash = &auth_hash_sha1; 233 break; 234 #endif 235 case CRYPTO_NULL_HMAC: 236 thash = &auth_hash_null; 237 break; 238 default: 239 return (EINVAL); 240 } 241 242 bzero(&crie, sizeof(crie)); 243 bzero(&cria, sizeof(cria)); 244 245 if (txform) { 246 crie.cri_alg = txform->type; 247 crie.cri_klen = sop->keylen * 8; 248 if (sop->keylen > txform->maxkey || 249 sop->keylen < txform->minkey) { 250 error = EINVAL; 251 goto bail; 252 } 253 254 MALLOC(crie.cri_key, u_int8_t *, 255 crie.cri_klen / 8, M_XDATA, M_WAITOK); 256 if ((error = copyin(sop->key, crie.cri_key, 257 crie.cri_klen / 8))) 258 goto bail; 259 if (thash) 260 crie.cri_next = &cria; 261 } 262 263 if (thash) { 264 cria.cri_alg = thash->type; 265 cria.cri_klen = sop->mackeylen * 8; 266 if (sop->mackeylen != thash->keysize) { 267 error = EINVAL; 268 goto bail; 269 } 270 271 if (cria.cri_klen) { 272 MALLOC(cria.cri_key, u_int8_t *, 273 cria.cri_klen / 8, M_XDATA, M_WAITOK); 274 if ((error = copyin(sop->mackey, cria.cri_key, 275 cria.cri_klen / 8))) 276 goto bail; 277 } 278 } 279 280 error = crypto_newsession(&sid, (txform ? &crie : &cria), 281 0); 282 if (error) { 283 /* this is an auditable security event? */ 284 printf("SIOCSESSION violates kernel parameters\n"); 285 goto bail; 286 } 287 288 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 289 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, 290 thash); 291 292 if (cse == NULL) { 293 crypto_freesession(sid); 294 error = EINVAL; 295 goto bail; 296 } 297 sop->ses = cse->ses; 298 299 bail: 300 if (error) { 301 if (crie.cri_key) 302 FREE(crie.cri_key, M_XDATA); 303 if (cria.cri_key) 304 FREE(cria.cri_key, M_XDATA); 305 } 306 break; 307 case CIOCFSESSION: 308 ses = *(u_int32_t *)data; 309 cse = csefind(fcr, ses); 310 if (cse == NULL) 311 return (EINVAL); 312 csedelete(fcr, cse); 313 error = csefree(cse); 314 break; 315 case CIOCCRYPT: 316 cop = (struct crypt_op *)data; 317 cse = csefind(fcr, cop->ses); 318 if (cse == NULL) 319 return (EINVAL); 320 error = cryptodev_op(cse, cop, p); 321 break; 322 case CIOCKEY: 323 error = cryptodev_key((struct crypt_kop *)data); 324 break; 325 case CIOCASYMFEAT: 326 error = crypto_getfeat((int *)data); 327 break; 328 default: 329 error = EINVAL; 330 } 331 return (error); 332 } 333 334 /* ARGSUSED */ 335 int 336 cryptof_fcntl(struct file *fp, u_int cmd, void *data, struct proc *p) 337 { 338 return (0); 339 } 340 341 static int 342 cryptodev_op(struct csession *cse, struct crypt_op *cop, struct proc *p) 343 { 344 struct cryptop *crp = NULL; 345 struct cryptodesc *crde = NULL, *crda = NULL; 346 int i, error, s; 347 348 if (cop->len > 256*1024-4) 349 return (E2BIG); 350 351 if (cse->txform && (cop->len % cse->txform->blocksize) != 0) 352 return (EINVAL); 353 354 bzero(&cse->uio, sizeof(cse->uio)); 355 cse->uio.uio_iovcnt = 1; 356 cse->uio.uio_resid = 0; 357 cse->uio.uio_segflg = UIO_SYSSPACE; 358 cse->uio.uio_rw = UIO_WRITE; 359 cse->uio.uio_procp = p; 360 cse->uio.uio_iov = cse->iovec; 361 bzero(&cse->iovec, sizeof(cse->iovec)); 362 cse->uio.uio_iov[0].iov_len = cop->len; 363 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 364 for (i = 0; i < cse->uio.uio_iovcnt; i++) 365 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len; 366 367 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 368 if (crp == NULL) { 369 error = ENOMEM; 370 goto bail; 371 } 372 373 if (cse->thash) { 374 crda = crp->crp_desc; 375 if (cse->txform) 376 crde = crda->crd_next; 377 } else { 378 if (cse->txform) 379 crde = crp->crp_desc; 380 else { 381 error = EINVAL; 382 goto bail; 383 } 384 } 385 386 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 387 goto bail; 388 389 if (crda) { 390 crda->crd_skip = 0; 391 crda->crd_len = cop->len; 392 crda->crd_inject = 0; /* ??? */ 393 394 crda->crd_alg = cse->mac; 395 crda->crd_key = cse->mackey; 396 crda->crd_klen = cse->mackeylen * 8; 397 } 398 399 if (crde) { 400 if (cop->op == COP_ENCRYPT) 401 crde->crd_flags |= CRD_F_ENCRYPT; 402 else 403 crde->crd_flags &= ~CRD_F_ENCRYPT; 404 crde->crd_len = cop->len; 405 crde->crd_inject = 0; 406 407 crde->crd_alg = cse->cipher; 408 crde->crd_key = cse->key; 409 crde->crd_klen = cse->keylen * 8; 410 } 411 412 crp->crp_ilen = cop->len; 413 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 414 | (cop->flags & COP_F_BATCH); 415 crp->crp_buf = (caddr_t)&cse->uio; 416 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 417 crp->crp_sid = cse->sid; 418 crp->crp_opaque = (void *)cse; 419 420 if (cop->iv) { 421 if (crde == NULL) { 422 error = EINVAL; 423 goto bail; 424 } 425 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 426 error = EINVAL; 427 goto bail; 428 } 429 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 430 goto bail; 431 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 432 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 433 crde->crd_skip = 0; 434 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 435 crde->crd_skip = 0; 436 } else if (crde) { 437 crde->crd_flags |= CRD_F_IV_PRESENT; 438 crde->crd_skip = cse->txform->blocksize; 439 crde->crd_len -= cse->txform->blocksize; 440 } 441 442 if (cop->mac) { 443 if (crda == NULL) { 444 error = EINVAL; 445 goto bail; 446 } 447 crp->crp_mac=cse->tmp_mac; 448 } 449 450 s = splcrypto(); /* NB: only needed with CRYPTO_F_CBIMM */ 451 error = crypto_dispatch(crp); 452 if (error == 0) { 453 error = tsleep(crp, PSOCK, "crydev", 0); 454 } 455 splx(s); 456 if (error) { 457 goto bail; 458 } 459 460 if (crp->crp_etype != 0) { 461 error = crp->crp_etype; 462 goto bail; 463 } 464 465 if (cse->error) { 466 error = cse->error; 467 goto bail; 468 } 469 470 if (cop->dst && 471 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 472 goto bail; 473 474 if (cop->mac && 475 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 476 goto bail; 477 478 bail: 479 if (crp) 480 crypto_freereq(crp); 481 if (cse->uio.uio_iov[0].iov_base) 482 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 483 484 return (error); 485 } 486 487 static int 488 cryptodev_cb(void *op) 489 { 490 struct cryptop *crp = (struct cryptop *) op; 491 struct csession *cse = (struct csession *)crp->crp_opaque; 492 493 cse->error = crp->crp_etype; 494 if (crp->crp_etype == EAGAIN) 495 return crypto_dispatch(crp); 496 wakeup_one(crp); 497 return (0); 498 } 499 500 static int 501 cryptodevkey_cb(void *op) 502 { 503 struct cryptkop *krp = (struct cryptkop *) op; 504 505 wakeup_one(krp); 506 return (0); 507 } 508 509 static int 510 cryptodev_key(struct crypt_kop *kop) 511 { 512 struct cryptkop *krp = NULL; 513 int error = EINVAL; 514 int in, out, size, i; 515 516 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 517 return (EFBIG); 518 } 519 520 in = kop->crk_iparams; 521 out = kop->crk_oparams; 522 switch (kop->crk_op) { 523 case CRK_MOD_EXP: 524 if (in == 3 && out == 1) 525 break; 526 return (EINVAL); 527 case CRK_MOD_EXP_CRT: 528 if (in == 6 && out == 1) 529 break; 530 return (EINVAL); 531 case CRK_DSA_SIGN: 532 if (in == 5 && out == 2) 533 break; 534 return (EINVAL); 535 case CRK_DSA_VERIFY: 536 if (in == 7 && out == 0) 537 break; 538 return (EINVAL); 539 case CRK_DH_COMPUTE_KEY: 540 if (in == 3 && out == 1) 541 break; 542 return (EINVAL); 543 default: 544 return (EINVAL); 545 } 546 547 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 548 if (!krp) 549 return (ENOMEM); 550 bzero(krp, sizeof *krp); 551 krp->krp_op = kop->crk_op; 552 krp->krp_status = kop->crk_status; 553 krp->krp_iparams = kop->crk_iparams; 554 krp->krp_oparams = kop->crk_oparams; 555 krp->krp_status = 0; 556 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 557 558 for (i = 0; i < CRK_MAXPARAM; i++) 559 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 560 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 561 size = (krp->krp_param[i].crp_nbits + 7) / 8; 562 if (size == 0) 563 continue; 564 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 565 if (i >= krp->krp_iparams) 566 continue; 567 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 568 if (error) 569 goto fail; 570 } 571 572 error = crypto_kdispatch(krp); 573 if (error == 0) 574 error = tsleep(krp, PSOCK, "crydev", 0); 575 if (error) 576 goto fail; 577 578 if (krp->krp_status != 0) { 579 error = krp->krp_status; 580 goto fail; 581 } 582 583 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 584 size = (krp->krp_param[i].crp_nbits + 7) / 8; 585 if (size == 0) 586 continue; 587 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 588 if (error) 589 goto fail; 590 } 591 592 fail: 593 if (krp) { 594 kop->crk_status = krp->krp_status; 595 for (i = 0; i < CRK_MAXPARAM; i++) { 596 if (krp->krp_param[i].crp_p) 597 FREE(krp->krp_param[i].crp_p, M_XDATA); 598 } 599 free(krp, M_XDATA); 600 } 601 return (error); 602 } 603 604 /* ARGSUSED */ 605 static int 606 cryptof_poll(struct file *fp, int which, struct proc *p) 607 { 608 return (0); 609 } 610 611 612 /* ARGSUSED */ 613 static int 614 cryptof_kqfilter(struct file *fp, struct knote *kn) 615 { 616 617 return (0); 618 } 619 620 /* ARGSUSED */ 621 static int 622 cryptof_stat(struct file *fp, struct stat *sb, struct proc *p) 623 { 624 return (EOPNOTSUPP); 625 } 626 627 /* ARGSUSED */ 628 static int 629 cryptof_close(struct file *fp, struct proc *p) 630 { 631 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 632 struct csession *cse; 633 634 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 635 TAILQ_REMOVE(&fcr->csessions, cse, next); 636 (void)csefree(cse); 637 } 638 FREE(fcr, M_XDATA); 639 640 /* close() stolen from sys/kern/kern_ktrace.c */ 641 642 fp->f_data = NULL; 643 #if 0 644 FILE_UNUSE(fp, p); /* release file */ 645 fdrelease(p, fd); /* release fd table slot */ 646 #endif 647 648 return 0; 649 } 650 651 static struct csession * 652 csefind(struct fcrypt *fcr, u_int ses) 653 { 654 struct csession *cse; 655 656 TAILQ_FOREACH(cse, &fcr->csessions, next) 657 if (cse->ses == ses) 658 return (cse); 659 return (NULL); 660 } 661 662 static int 663 csedelete(struct fcrypt *fcr, struct csession *cse_del) 664 { 665 struct csession *cse; 666 667 TAILQ_FOREACH(cse, &fcr->csessions, next) { 668 if (cse == cse_del) { 669 TAILQ_REMOVE(&fcr->csessions, cse, next); 670 return (1); 671 } 672 } 673 return (0); 674 } 675 676 static struct csession * 677 cseadd(struct fcrypt *fcr, struct csession *cse) 678 { 679 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 680 cse->ses = fcr->sesn++; 681 return (cse); 682 } 683 684 static struct csession * 685 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 686 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 687 struct enc_xform *txform, struct auth_hash *thash) 688 { 689 struct csession *cse; 690 691 MALLOC(cse, struct csession *, sizeof(struct csession), 692 M_XDATA, M_NOWAIT); 693 if (cse == NULL) 694 return NULL; 695 cse->key = key; 696 cse->keylen = keylen/8; 697 cse->mackey = mackey; 698 cse->mackeylen = mackeylen/8; 699 cse->sid = sid; 700 cse->cipher = cipher; 701 cse->mac = mac; 702 cse->txform = txform; 703 cse->thash = thash; 704 cseadd(fcr, cse); 705 return (cse); 706 } 707 708 static int 709 csefree(struct csession *cse) 710 { 711 int error; 712 713 error = crypto_freesession(cse->sid); 714 if (cse->key) 715 FREE(cse->key, M_XDATA); 716 if (cse->mackey) 717 FREE(cse->mackey, M_XDATA); 718 FREE(cse, M_XDATA); 719 return (error); 720 } 721 722 static int 723 cryptoopen(dev_t dev, int flag, int mode, struct proc *p) 724 { 725 if (crypto_usercrypto == 0) 726 return (ENXIO); 727 return (0); 728 } 729 730 static int 731 cryptoread(dev_t dev, struct uio *uio, int ioflag) 732 { 733 return (EIO); 734 } 735 736 static int 737 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 738 { 739 return (EIO); 740 } 741 742 static int 743 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 744 { 745 struct file *f; 746 struct fcrypt *fcr; 747 int fd, error; 748 749 switch (cmd) { 750 case CRIOGET: 751 MALLOC(fcr, struct fcrypt *, 752 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 753 TAILQ_INIT(&fcr->csessions); 754 fcr->sesn = 0; 755 756 error = falloc(p, &f, &fd); 757 if (error) { 758 FREE(fcr, M_XDATA); 759 return (error); 760 } 761 f->f_flag = FREAD | FWRITE; 762 f->f_type = DTYPE_CRYPTO; 763 f->f_ops = &cryptofops; 764 f->f_data = (caddr_t) fcr; 765 *(u_int32_t *)data = fd; 766 FILE_SET_MATURE(f); 767 FILE_UNUSE(f, p); 768 break; 769 default: 770 error = EINVAL; 771 break; 772 } 773 return (error); 774 } 775 776 int 777 cryptoselect(dev_t dev, int rw, struct proc *p) 778 { 779 return (0); 780 } 781 782 #define CRYPTO_MAJOR 70 /* from openbsd */ 783 /*static*/ 784 struct cdevsw crypto_cdevsw = { 785 /* open */ cryptoopen, 786 /* close */ nullclose, 787 /* read */ cryptoread, 788 /* write */ cryptowrite, 789 /* ioctl */ cryptoioctl, 790 /* ttstop?*/ nostop, 791 /* ??*/ notty, 792 /* poll */ cryptoselect /*nopoll*/, 793 /* mmap */ nommap, 794 /* kqfilter */ nokqfilter, 795 }; 796 797
Indexes created Thu Oct 02 14:10:14 GMT 2025