cryptodev.c revision 1.6
1 /* $NetBSD: cryptodev.c,v 1.6 2003/08/25 04:09:57 thorpej 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 1.6 2003/08/25 04:09:57 thorpej 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 <crypto/ripemd160/rmd160.h> 54 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 && (crp->crp_flags & CRYPTO_F_DONE) == 0) 454 error = tsleep(crp, PSOCK, "crydev", 0); 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 /*static*/ 783 struct cdevsw crypto_cdevsw = { 784 /* open */ cryptoopen, 785 /* close */ nullclose, 786 /* read */ cryptoread, 787 /* write */ cryptowrite, 788 /* ioctl */ cryptoioctl, 789 /* ttstop?*/ nostop, 790 /* ??*/ notty, 791 /* poll */ cryptoselect /*nopoll*/, 792 /* mmap */ nommap, 793 /* kqfilter */ nokqfilter, 794 }; 795 796
Indexes created Thu Oct 02 14:10:14 GMT 2025