cryptodev.c revision 1.2
1 /* $NetBSD: cryptodev.c,v 1.2 2003/07/28 19:37:04 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 1.2 2003/07/28 19:37:04 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 <dev/rndvar.h> 51 #include <sys/conf.h> 52 #include <sys/device.h> 53 54 #include <opencrypto/rmd160.h> 55 #include <opencrypto/cast.h> 56 #include <opencrypto/skipjack.h> 57 #include <opencrypto/blf.h> 58 #include <opencrypto/cryptodev.h> 59 #include <opencrypto/xform.h> 60 61 #ifdef __NetBSD__ 62 #define splcrypto splnet 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 proc *p); 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 proc *p); 99 static int cryptoselect(dev_t dev, int rw, struct proc *p); 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 proc *p); 105 static int cryptof_fcntl(struct file *, u_int, void*, struct proc *p); 106 static int cryptof_poll(struct file *, int, struct proc *); 107 static int cryptof_kqfilter(struct file *, struct knote *); 108 static int cryptof_stat(struct file *, struct stat *, struct proc *); 109 static int cryptof_close(struct file *, struct proc *); 110 111 static struct fileops cryptofops = { 112 cryptof_read, 113 cryptof_write, 114 cryptof_ioctl, 115 cryptof_fcntl, 116 cryptof_poll, 117 cryptof_stat, 118 cryptof_close, 119 cryptof_kqfilter 120 }; 121 122 static struct csession *csefind(struct fcrypt *, u_int); 123 static int csedelete(struct fcrypt *, struct csession *); 124 static struct csession *cseadd(struct fcrypt *, struct csession *); 125 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, u_int64_t, 126 caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 127 struct auth_hash *); 128 static int csefree(struct csession *); 129 130 static int cryptodev_op(struct csession *, struct crypt_op *, struct proc *); 131 static int cryptodev_key(struct crypt_kop *); 132 int cryptodev_dokey(struct crypt_kop *kop, struct crparam kvp[]); 133 134 static int cryptodev_cb(void *); 135 static int cryptodevkey_cb(void *); 136 137 int usercrypto = 1; /* userland may do crypto requests */ 138 int userasymcrypto = 1; /* userland may do asymmetric crypto reqs */ 139 int cryptodevallowsoft = 1; /* only use hardware crypto */ 140 141 /* ARGSUSED */ 142 int 143 cryptof_read(struct file *fp, off_t *poff, struct uio *uio, 144 struct ucred *cred, int flags) 145 { 146 return (EIO); 147 } 148 149 /* ARGSUSED */ 150 int 151 cryptof_write(struct file *fp, off_t *poff, struct uio *uio, 152 struct ucred *cred, int flags) 153 { 154 return (EIO); 155 } 156 157 /* ARGSUSED */ 158 int 159 cryptof_ioctl(struct file *fp, u_long cmd, void* data, struct proc *p) 160 { 161 struct cryptoini cria, crie; 162 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 163 struct csession *cse; 164 struct session_op *sop; 165 struct crypt_op *cop; 166 struct enc_xform *txform = NULL; 167 struct auth_hash *thash = NULL; 168 u_int64_t sid; 169 u_int32_t ses; 170 int error = 0; 171 172 switch (cmd) { 173 case CIOCGSESSION: 174 sop = (struct session_op *)data; 175 switch (sop->cipher) { 176 case 0: 177 break; 178 case CRYPTO_DES_CBC: 179 txform = &enc_xform_des; 180 break; 181 case CRYPTO_3DES_CBC: 182 txform = &enc_xform_3des; 183 break; 184 case CRYPTO_BLF_CBC: 185 txform = &enc_xform_blf; 186 break; 187 case CRYPTO_CAST_CBC: 188 txform = &enc_xform_cast5; 189 break; 190 case CRYPTO_SKIPJACK_CBC: 191 txform = &enc_xform_skipjack; 192 break; 193 case CRYPTO_AES_CBC: 194 txform = &enc_xform_rijndael128; 195 break; 196 case CRYPTO_NULL_CBC: 197 txform = &enc_xform_null; 198 break; 199 case CRYPTO_ARC4: 200 txform = &enc_xform_arc4; 201 break; 202 default: 203 return (EINVAL); 204 } 205 206 switch (sop->mac) { 207 case 0: 208 break; 209 case CRYPTO_MD5_HMAC: 210 thash = &auth_hash_hmac_md5_96; 211 break; 212 case CRYPTO_SHA1_HMAC: 213 thash = &auth_hash_hmac_sha1_96; 214 break; 215 case CRYPTO_SHA2_HMAC: 216 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 217 thash = &auth_hash_hmac_sha2_256; 218 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 219 thash = &auth_hash_hmac_sha2_384; 220 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 221 thash = &auth_hash_hmac_sha2_512; 222 else 223 return (EINVAL); 224 break; 225 case CRYPTO_RIPEMD160_HMAC: 226 thash = &auth_hash_hmac_ripemd_160_96; 227 break; 228 #ifdef notdef 229 case CRYPTO_MD5: 230 thash = &auth_hash_md5; 231 break; 232 case CRYPTO_SHA1: 233 thash = &auth_hash_sha1; 234 break; 235 #endif 236 case CRYPTO_NULL_HMAC: 237 thash = &auth_hash_null; 238 break; 239 default: 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 error = EINVAL; 252 goto bail; 253 } 254 255 MALLOC(crie.cri_key, u_int8_t *, 256 crie.cri_klen / 8, M_XDATA, M_WAITOK); 257 if ((error = copyin(sop->key, crie.cri_key, 258 crie.cri_klen / 8))) 259 goto bail; 260 if (thash) 261 crie.cri_next = &cria; 262 } 263 264 if (thash) { 265 cria.cri_alg = thash->type; 266 cria.cri_klen = sop->mackeylen * 8; 267 if (sop->mackeylen != thash->keysize) { 268 error = EINVAL; 269 goto bail; 270 } 271 272 if (cria.cri_klen) { 273 MALLOC(cria.cri_key, u_int8_t *, 274 cria.cri_klen / 8, M_XDATA, M_WAITOK); 275 if ((error = copyin(sop->mackey, cria.cri_key, 276 cria.cri_klen / 8))) 277 goto bail; 278 } 279 } 280 281 error = crypto_newsession(&sid, (txform ? &crie : &cria), 282 0); 283 if (error) { 284 /* this is an auditable security event? */ 285 printf("SIOCSESSION violates kernel parameters\n"); 286 goto bail; 287 } 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; 299 300 bail: 301 if (error) { 302 if (crie.cri_key) 303 FREE(crie.cri_key, M_XDATA); 304 if (cria.cri_key) 305 FREE(cria.cri_key, M_XDATA); 306 } 307 break; 308 case CIOCFSESSION: 309 ses = *(u_int32_t *)data; 310 cse = csefind(fcr, ses); 311 if (cse == NULL) 312 return (EINVAL); 313 csedelete(fcr, cse); 314 error = csefree(cse); 315 break; 316 case CIOCCRYPT: 317 cop = (struct crypt_op *)data; 318 cse = csefind(fcr, cop->ses); 319 if (cse == NULL) 320 return (EINVAL); 321 error = cryptodev_op(cse, cop, p); 322 break; 323 case CIOCKEY: 324 error = cryptodev_key((struct crypt_kop *)data); 325 break; 326 case CIOCASYMFEAT: 327 error = crypto_getfeat((int *)data); 328 break; 329 default: 330 error = EINVAL; 331 } 332 return (error); 333 } 334 335 /* ARGSUSED */ 336 int 337 cryptof_fcntl(struct file *fp, u_int cmd, void *data, struct proc *p) 338 { 339 return (0); 340 } 341 342 static int 343 cryptodev_op(struct csession *cse, struct crypt_op *cop, struct proc *p) 344 { 345 struct cryptop *crp = NULL; 346 struct cryptodesc *crde = NULL, *crda = NULL; 347 int i, error, s; 348 349 if (cop->len > 256*1024-4) 350 return (E2BIG); 351 352 if (cse->txform && (cop->len % cse->txform->blocksize) != 0) 353 return (EINVAL); 354 355 bzero(&cse->uio, sizeof(cse->uio)); 356 cse->uio.uio_iovcnt = 1; 357 cse->uio.uio_resid = 0; 358 cse->uio.uio_segflg = UIO_SYSSPACE; 359 cse->uio.uio_rw = UIO_WRITE; 360 cse->uio.uio_procp = p; 361 cse->uio.uio_iov = cse->iovec; 362 bzero(&cse->iovec, sizeof(cse->iovec)); 363 cse->uio.uio_iov[0].iov_len = cop->len; 364 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 365 for (i = 0; i < cse->uio.uio_iovcnt; i++) 366 cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len; 367 368 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 369 if (crp == NULL) { 370 error = ENOMEM; 371 goto bail; 372 } 373 374 if (cse->thash) { 375 crda = crp->crp_desc; 376 if (cse->txform) 377 crde = crda->crd_next; 378 } else { 379 if (cse->txform) 380 crde = crp->crp_desc; 381 else { 382 error = EINVAL; 383 goto bail; 384 } 385 } 386 387 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 388 goto bail; 389 390 if (crda) { 391 crda->crd_skip = 0; 392 crda->crd_len = cop->len; 393 crda->crd_inject = 0; /* ??? */ 394 395 crda->crd_alg = cse->mac; 396 crda->crd_key = cse->mackey; 397 crda->crd_klen = cse->mackeylen * 8; 398 } 399 400 if (crde) { 401 if (cop->op == COP_ENCRYPT) 402 crde->crd_flags |= CRD_F_ENCRYPT; 403 else 404 crde->crd_flags &= ~CRD_F_ENCRYPT; 405 crde->crd_len = cop->len; 406 crde->crd_inject = 0; 407 408 crde->crd_alg = cse->cipher; 409 crde->crd_key = cse->key; 410 crde->crd_klen = cse->keylen * 8; 411 } 412 413 crp->crp_ilen = cop->len; 414 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 415 | (cop->flags & COP_F_BATCH); 416 crp->crp_buf = (caddr_t)&cse->uio; 417 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 418 crp->crp_sid = cse->sid; 419 crp->crp_opaque = (void *)cse; 420 421 if (cop->iv) { 422 if (crde == NULL) { 423 error = EINVAL; 424 goto bail; 425 } 426 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 427 error = EINVAL; 428 goto bail; 429 } 430 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 431 goto bail; 432 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 433 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 434 crde->crd_skip = 0; 435 } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 436 crde->crd_skip = 0; 437 } else if (crde) { 438 crde->crd_flags |= CRD_F_IV_PRESENT; 439 crde->crd_skip = cse->txform->blocksize; 440 crde->crd_len -= cse->txform->blocksize; 441 } 442 443 if (cop->mac) { 444 if (crda == NULL) { 445 error = EINVAL; 446 goto bail; 447 } 448 crp->crp_mac=cse->tmp_mac; 449 } 450 451 s = splcrypto(); /* NB: only needed with CRYPTO_F_CBIMM */ 452 error = crypto_dispatch(crp); 453 if (error == 0) { 454 error = tsleep(crp, PSOCK, "crydev", 0); 455 } 456 splx(s); 457 if (error) { 458 goto bail; 459 } 460 461 if (crp->crp_etype != 0) { 462 error = crp->crp_etype; 463 goto bail; 464 } 465 466 if (cse->error) { 467 error = cse->error; 468 goto bail; 469 } 470 471 if (cop->dst && 472 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 473 goto bail; 474 475 if (cop->mac && 476 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) 477 goto bail; 478 479 bail: 480 if (crp) 481 crypto_freereq(crp); 482 if (cse->uio.uio_iov[0].iov_base) 483 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 484 485 return (error); 486 } 487 488 static int 489 cryptodev_cb(void *op) 490 { 491 struct cryptop *crp = (struct cryptop *) op; 492 struct csession *cse = (struct csession *)crp->crp_opaque; 493 494 cse->error = crp->crp_etype; 495 if (crp->crp_etype == EAGAIN) 496 return crypto_dispatch(crp); 497 wakeup_one(crp); 498 return (0); 499 } 500 501 static int 502 cryptodevkey_cb(void *op) 503 { 504 struct cryptkop *krp = (struct cryptkop *) op; 505 506 wakeup_one(krp); 507 return (0); 508 } 509 510 static int 511 cryptodev_key(struct crypt_kop *kop) 512 { 513 struct cryptkop *krp = NULL; 514 int error = EINVAL; 515 int in, out, size, i; 516 517 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 518 return (EFBIG); 519 } 520 521 in = kop->crk_iparams; 522 out = kop->crk_oparams; 523 switch (kop->crk_op) { 524 case CRK_MOD_EXP: 525 if (in == 3 && out == 1) 526 break; 527 return (EINVAL); 528 case CRK_MOD_EXP_CRT: 529 if (in == 6 && out == 1) 530 break; 531 return (EINVAL); 532 case CRK_DSA_SIGN: 533 if (in == 5 && out == 2) 534 break; 535 return (EINVAL); 536 case CRK_DSA_VERIFY: 537 if (in == 7 && out == 0) 538 break; 539 return (EINVAL); 540 case CRK_DH_COMPUTE_KEY: 541 if (in == 3 && out == 1) 542 break; 543 return (EINVAL); 544 default: 545 return (EINVAL); 546 } 547 548 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK); 549 if (!krp) 550 return (ENOMEM); 551 bzero(krp, sizeof *krp); 552 krp->krp_op = kop->crk_op; 553 krp->krp_status = kop->crk_status; 554 krp->krp_iparams = kop->crk_iparams; 555 krp->krp_oparams = kop->crk_oparams; 556 krp->krp_status = 0; 557 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 558 559 for (i = 0; i < CRK_MAXPARAM; i++) 560 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 561 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 562 size = (krp->krp_param[i].crp_nbits + 7) / 8; 563 if (size == 0) 564 continue; 565 MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); 566 if (i >= krp->krp_iparams) 567 continue; 568 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 569 if (error) 570 goto fail; 571 } 572 573 error = crypto_kdispatch(krp); 574 if (error == 0) 575 error = tsleep(krp, PSOCK, "crydev", 0); 576 if (error) 577 goto fail; 578 579 if (krp->krp_status != 0) { 580 error = krp->krp_status; 581 goto fail; 582 } 583 584 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 585 size = (krp->krp_param[i].crp_nbits + 7) / 8; 586 if (size == 0) 587 continue; 588 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 589 if (error) 590 goto fail; 591 } 592 593 fail: 594 if (krp) { 595 kop->crk_status = krp->krp_status; 596 for (i = 0; i < CRK_MAXPARAM; i++) { 597 if (krp->krp_param[i].crp_p) 598 FREE(krp->krp_param[i].crp_p, M_XDATA); 599 } 600 free(krp, M_XDATA); 601 } 602 return (error); 603 } 604 605 /* ARGSUSED */ 606 static int 607 cryptof_poll(struct file *fp, int which, struct proc *p) 608 { 609 return (0); 610 } 611 612 613 /* ARGSUSED */ 614 static int 615 cryptof_kqfilter(struct file *fp, struct knote *kn) 616 { 617 618 return (0); 619 } 620 621 /* ARGSUSED */ 622 static int 623 cryptof_stat(struct file *fp, struct stat *sb, struct proc *p) 624 { 625 return (EOPNOTSUPP); 626 } 627 628 /* ARGSUSED */ 629 static int 630 cryptof_close(struct file *fp, struct proc *p) 631 { 632 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 633 struct csession *cse; 634 635 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 636 TAILQ_REMOVE(&fcr->csessions, cse, next); 637 (void)csefree(cse); 638 } 639 FREE(fcr, M_XDATA); 640 641 /* close() stolen from sys/kern/kern_ktrace.c */ 642 643 fp->f_data = NULL; 644 #if 0 645 FILE_UNUSE(fp, p); /* release file */ 646 fdrelease(p, fd); /* release fd table slot */ 647 #endif 648 649 return 0; 650 } 651 652 static struct csession * 653 csefind(struct fcrypt *fcr, u_int ses) 654 { 655 struct csession *cse; 656 657 TAILQ_FOREACH(cse, &fcr->csessions, next) 658 if (cse->ses == ses) 659 return (cse); 660 return (NULL); 661 } 662 663 static int 664 csedelete(struct fcrypt *fcr, struct csession *cse_del) 665 { 666 struct csession *cse; 667 668 TAILQ_FOREACH(cse, &fcr->csessions, next) { 669 if (cse == cse_del) { 670 TAILQ_REMOVE(&fcr->csessions, cse, next); 671 return (1); 672 } 673 } 674 return (0); 675 } 676 677 static struct csession * 678 cseadd(struct fcrypt *fcr, struct csession *cse) 679 { 680 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 681 cse->ses = fcr->sesn++; 682 return (cse); 683 } 684 685 static struct csession * 686 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, 687 caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 688 struct enc_xform *txform, struct auth_hash *thash) 689 { 690 struct csession *cse; 691 692 MALLOC(cse, struct csession *, sizeof(struct csession), 693 M_XDATA, M_NOWAIT); 694 if (cse == NULL) 695 return NULL; 696 cse->key = key; 697 cse->keylen = keylen/8; 698 cse->mackey = mackey; 699 cse->mackeylen = mackeylen/8; 700 cse->sid = sid; 701 cse->cipher = cipher; 702 cse->mac = mac; 703 cse->txform = txform; 704 cse->thash = thash; 705 cseadd(fcr, cse); 706 return (cse); 707 } 708 709 static int 710 csefree(struct csession *cse) 711 { 712 int error; 713 714 error = crypto_freesession(cse->sid); 715 if (cse->key) 716 FREE(cse->key, M_XDATA); 717 if (cse->mackey) 718 FREE(cse->mackey, M_XDATA); 719 FREE(cse, M_XDATA); 720 return (error); 721 } 722 723 static int 724 cryptoopen(dev_t dev, int flag, int mode, struct proc *p) 725 { 726 if (crypto_usercrypto == 0) 727 return (ENXIO); 728 return (0); 729 } 730 731 static int 732 cryptoread(dev_t dev, struct uio *uio, int ioflag) 733 { 734 return (EIO); 735 } 736 737 static int 738 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 739 { 740 return (EIO); 741 } 742 743 static int 744 cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 745 { 746 struct file *f; 747 struct fcrypt *fcr; 748 int fd, error; 749 750 switch (cmd) { 751 case CRIOGET: 752 MALLOC(fcr, struct fcrypt *, 753 sizeof(struct fcrypt), M_XDATA, M_WAITOK); 754 TAILQ_INIT(&fcr->csessions); 755 fcr->sesn = 0; 756 757 error = falloc(p, &f, &fd); 758 if (error) { 759 FREE(fcr, M_XDATA); 760 return (error); 761 } 762 f->f_flag = FREAD | FWRITE; 763 f->f_type = DTYPE_CRYPTO; 764 f->f_ops = &cryptofops; 765 f->f_data = (caddr_t) fcr; 766 *(u_int32_t *)data = fd; 767 FILE_SET_MATURE(f); 768 FILE_UNUSE(f, p); 769 break; 770 default: 771 error = EINVAL; 772 break; 773 } 774 return (error); 775 } 776 777 int 778 cryptoselect(dev_t dev, int rw, struct proc *p) 779 { 780 return (0); 781 } 782 783 #define CRYPTO_MAJOR 70 /* from openbsd */ 784 /*static*/ 785 struct cdevsw crypto_cdevsw = { 786 /* open */ cryptoopen, 787 /* close */ nullclose, 788 /* read */ cryptoread, 789 /* write */ cryptowrite, 790 /* ioctl */ cryptoioctl, 791 /* ttstop?*/ nostop, 792 /* ??*/ notty, 793 /* poll */ cryptoselect /*nopoll*/, 794 /* mmap */ nommap, 795 /* kqfilter */ nokqfilter, 796 }; 797 798
Indexes created Tue Sep 23 02:09:52 GMT 2025