cryptodev.c revision 1.35
1 /* $NetBSD: cryptodev.c,v 1.35 2008/03/21 21:55:01 ad 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 1.35 2008/03/21 21:55:01 ad 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/pool.h> 45 #include <sys/sysctl.h> 46 #include <sys/file.h> 47 #include <sys/filedesc.h> 48 #include <sys/errno.h> 49 #include <sys/md5.h> 50 #include <sys/sha1.h> 51 #include <sys/conf.h> 52 #include <sys/device.h> 53 #include <sys/kauth.h> 54 55 #include "opt_ocf.h" 56 #include <opencrypto/cryptodev.h> 57 #include <opencrypto/xform.h> 58 59 struct csession { 60 TAILQ_ENTRY(csession) next; 61 u_int64_t sid; 62 u_int32_t ses; 63 64 u_int32_t cipher; 65 struct enc_xform *txform; 66 u_int32_t mac; 67 struct auth_hash *thash; 68 69 void * key; 70 int keylen; 71 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 72 73 void * mackey; 74 int mackeylen; 75 u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; 76 77 struct iovec iovec[1]; /* user requests never have more */ 78 struct uio uio; 79 int error; 80 }; 81 82 struct fcrypt { 83 TAILQ_HEAD(csessionlist, csession) csessions; 84 int sesn; 85 }; 86 87 /* For our fixed-size allocations */ 88 struct pool fcrpl; 89 struct pool csepl; 90 91 /* Declaration of master device (fd-cloning/ctxt-allocating) entrypoints */ 92 static int cryptoopen(dev_t dev, int flag, int mode, struct lwp *l); 93 static int cryptoread(dev_t dev, struct uio *uio, int ioflag); 94 static int cryptowrite(dev_t dev, struct uio *uio, int ioflag); 95 static int cryptoselect(dev_t dev, int rw, struct lwp *l); 96 97 /* Declaration of cloned-device (per-ctxt) entrypoints */ 98 static int cryptof_read(file_t *, off_t *, struct uio *, kauth_cred_t, int); 99 static int cryptof_write(file_t *, off_t *, struct uio *, kauth_cred_t, int); 100 static int cryptof_ioctl(file_t *, u_long, void *); 101 static int cryptof_close(file_t *); 102 103 static const struct fileops cryptofops = { 104 cryptof_read, 105 cryptof_write, 106 cryptof_ioctl, 107 fnullop_fcntl, 108 fnullop_poll, 109 fbadop_stat, 110 cryptof_close, 111 fnullop_kqfilter 112 }; 113 114 static struct csession *csefind(struct fcrypt *, u_int); 115 static int csedelete(struct fcrypt *, struct csession *); 116 static struct csession *cseadd(struct fcrypt *, struct csession *); 117 static struct csession *csecreate(struct fcrypt *, u_int64_t, void *, u_int64_t, 118 void *, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 119 struct auth_hash *); 120 static int csefree(struct csession *); 121 122 static int cryptodev_op(struct csession *, struct crypt_op *, struct lwp *); 123 static int cryptodev_key(struct crypt_kop *); 124 int cryptodev_dokey(struct crypt_kop *kop, struct crparam kvp[]); 125 126 static int cryptodev_cb(void *); 127 static int cryptodevkey_cb(void *); 128 129 /* 130 * sysctl-able control variables for /dev/crypto now defined in crypto.c: 131 * crypto_usercrypto, crypto_userasmcrypto, crypto_devallowsoft. 132 */ 133 134 /* ARGSUSED */ 135 int 136 cryptof_read(file_t *fp, off_t *poff, 137 struct uio *uio, kauth_cred_t cred, int flags) 138 { 139 return (EIO); 140 } 141 142 /* ARGSUSED */ 143 int 144 cryptof_write(file_t *fp, off_t *poff, 145 struct uio *uio, kauth_cred_t cred, int flags) 146 { 147 return (EIO); 148 } 149 150 /* ARGSUSED */ 151 int 152 cryptof_ioctl(file_t *fp, u_long cmd, void *data) 153 { 154 struct cryptoini cria, crie; 155 struct fcrypt *fcr = fp->f_data; 156 struct csession *cse; 157 struct session_op *sop; 158 struct crypt_op *cop; 159 struct enc_xform *txform = NULL; 160 struct auth_hash *thash = NULL; 161 u_int64_t sid; 162 u_int32_t ses; 163 int error = 0; 164 165 /* backwards compatibility */ 166 file_t *criofp; 167 struct fcrypt *criofcr; 168 int criofd; 169 170 switch (cmd) { 171 case CRIOGET: /* XXX deprecated, remove after 5.0 */ 172 if ((error = fd_allocfile(&criofp, &criofd)) != 0) 173 return error; 174 criofcr = pool_get(&fcrpl, PR_WAITOK); 175 mutex_spin_enter(&crypto_mtx); 176 TAILQ_INIT(&criofcr->csessions); 177 /* 178 * Don't ever return session 0, to allow detection of 179 * failed creation attempts with multi-create ioctl. 180 */ 181 criofcr->sesn = 1; 182 mutex_spin_exit(&crypto_mtx); 183 (void)fd_clone(criofp, criofd, (FREAD|FWRITE), 184 &cryptofops, criofcr); 185 *(u_int32_t *)data = criofd; 186 return error; 187 break; 188 case CIOCGSESSION: 189 sop = (struct session_op *)data; 190 switch (sop->cipher) { 191 case 0: 192 break; 193 case CRYPTO_DES_CBC: 194 txform = &enc_xform_des; 195 break; 196 case CRYPTO_3DES_CBC: 197 txform = &enc_xform_3des; 198 break; 199 case CRYPTO_BLF_CBC: 200 txform = &enc_xform_blf; 201 break; 202 case CRYPTO_CAST_CBC: 203 txform = &enc_xform_cast5; 204 break; 205 case CRYPTO_SKIPJACK_CBC: 206 txform = &enc_xform_skipjack; 207 break; 208 case CRYPTO_AES_CBC: 209 txform = &enc_xform_rijndael128; 210 break; 211 case CRYPTO_NULL_CBC: 212 txform = &enc_xform_null; 213 break; 214 case CRYPTO_ARC4: 215 txform = &enc_xform_arc4; 216 break; 217 default: 218 DPRINTF(("Invalid cipher %d\n", sop->cipher)); 219 return (EINVAL); 220 } 221 222 switch (sop->mac) { 223 case 0: 224 break; 225 case CRYPTO_MD5_HMAC: 226 thash = &auth_hash_hmac_md5; 227 break; 228 case CRYPTO_SHA1_HMAC: 229 thash = &auth_hash_hmac_sha1; 230 break; 231 case CRYPTO_MD5_HMAC_96: 232 thash = &auth_hash_hmac_md5_96; 233 break; 234 case CRYPTO_SHA1_HMAC_96: 235 thash = &auth_hash_hmac_sha1_96; 236 break; 237 case CRYPTO_SHA2_HMAC: 238 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) 239 thash = &auth_hash_hmac_sha2_256; 240 else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) 241 thash = &auth_hash_hmac_sha2_384; 242 else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) 243 thash = &auth_hash_hmac_sha2_512; 244 else { 245 DPRINTF(("Invalid mackeylen %d\n", 246 sop->mackeylen)); 247 return (EINVAL); 248 } 249 break; 250 case CRYPTO_RIPEMD160_HMAC: 251 thash = &auth_hash_hmac_ripemd_160_96; 252 break; 253 case CRYPTO_MD5: 254 thash = &auth_hash_md5; 255 break; 256 case CRYPTO_SHA1: 257 thash = &auth_hash_sha1; 258 break; 259 case CRYPTO_NULL_HMAC: 260 thash = &auth_hash_null; 261 break; 262 default: 263 DPRINTF(("Invalid mac %d\n", sop->mac)); 264 return (EINVAL); 265 } 266 267 bzero(&crie, sizeof(crie)); 268 bzero(&cria, sizeof(cria)); 269 270 if (txform) { 271 crie.cri_alg = txform->type; 272 crie.cri_klen = sop->keylen * 8; 273 if (sop->keylen > txform->maxkey || 274 sop->keylen < txform->minkey) { 275 DPRINTF(("keylen %d not in [%d,%d]\n", 276 sop->keylen, txform->minkey, 277 txform->maxkey)); 278 error = EINVAL; 279 goto bail; 280 } 281 282 crie.cri_key = malloc(crie.cri_klen / 8, M_XDATA, 283 M_WAITOK); 284 if ((error = copyin(sop->key, crie.cri_key, 285 crie.cri_klen / 8))) 286 goto bail; 287 if (thash) 288 crie.cri_next = &cria; 289 } 290 291 if (thash) { 292 cria.cri_alg = thash->type; 293 cria.cri_klen = sop->mackeylen * 8; 294 if (sop->mackeylen != thash->keysize) { 295 DPRINTF(("mackeylen %d != keysize %d\n", 296 sop->mackeylen, thash->keysize)); 297 error = EINVAL; 298 goto bail; 299 } 300 301 if (cria.cri_klen) { 302 cria.cri_key = malloc(cria.cri_klen / 8, 303 M_XDATA, M_WAITOK); 304 if ((error = copyin(sop->mackey, cria.cri_key, 305 cria.cri_klen / 8))) 306 goto bail; 307 } 308 } 309 /* crypto_newsession requires that we hold the mutex. */ 310 mutex_spin_enter(&crypto_mtx); 311 error = crypto_newsession(&sid, (txform ? &crie : &cria), 312 crypto_devallowsoft); 313 if (!error) { 314 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 315 cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, 316 txform, thash); 317 if (cse != NULL) { 318 sop->ses = cse->ses; 319 } else { 320 DPRINTF(("csecreate failed\n")); 321 crypto_freesession(sid); 322 error = EINVAL; 323 } 324 } else { 325 DPRINTF(("SIOCSESSION violates kernel parameters %d\n", 326 error)); 327 } 328 mutex_spin_exit(&crypto_mtx); 329 bail: 330 if (error) { 331 if (crie.cri_key) 332 FREE(crie.cri_key, M_XDATA); 333 if (cria.cri_key) 334 FREE(cria.cri_key, M_XDATA); 335 } 336 break; 337 case CIOCFSESSION: 338 mutex_spin_enter(&crypto_mtx); 339 ses = *(u_int32_t *)data; 340 cse = csefind(fcr, ses); 341 if (cse == NULL) 342 return (EINVAL); 343 csedelete(fcr, cse); 344 error = csefree(cse); 345 mutex_spin_exit(&crypto_mtx); 346 break; 347 case CIOCCRYPT: 348 mutex_spin_enter(&crypto_mtx); 349 cop = (struct crypt_op *)data; 350 cse = csefind(fcr, cop->ses); 351 mutex_spin_exit(&crypto_mtx); 352 if (cse == NULL) { 353 DPRINTF(("csefind failed\n")); 354 return (EINVAL); 355 } 356 error = cryptodev_op(cse, cop, curlwp); 357 DPRINTF(("cryptodev_op error = %d\n", error)); 358 break; 359 case CIOCKEY: 360 error = cryptodev_key((struct crypt_kop *)data); 361 DPRINTF(("cryptodev_key error = %d\n", error)); 362 break; 363 case CIOCASYMFEAT: 364 error = crypto_getfeat((int *)data); 365 break; 366 default: 367 DPRINTF(("invalid ioctl cmd %ld\n", cmd)); 368 error = EINVAL; 369 } 370 return (error); 371 } 372 373 static int 374 cryptodev_op(struct csession *cse, struct crypt_op *cop, struct lwp *l) 375 { 376 struct cryptop *crp = NULL; 377 struct cryptodesc *crde = NULL, *crda = NULL; 378 int error; 379 380 if (cop->len > 256*1024-4) 381 return (E2BIG); 382 383 if (cse->txform) { 384 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 385 return (EINVAL); 386 } 387 388 bzero(&cse->uio, sizeof(cse->uio)); 389 cse->uio.uio_iovcnt = 1; 390 cse->uio.uio_resid = 0; 391 cse->uio.uio_rw = UIO_WRITE; 392 cse->uio.uio_iov = cse->iovec; 393 UIO_SETUP_SYSSPACE(&cse->uio); 394 memset(&cse->iovec, 0, sizeof(cse->iovec)); 395 cse->uio.uio_iov[0].iov_len = cop->len; 396 cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK); 397 cse->uio.uio_resid = cse->uio.uio_iov[0].iov_len; 398 399 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 400 if (crp == NULL) { 401 error = ENOMEM; 402 goto bail; 403 } 404 405 if (cse->thash) { 406 crda = crp->crp_desc; 407 if (cse->txform) 408 crde = crda->crd_next; 409 } else { 410 if (cse->txform) 411 crde = crp->crp_desc; 412 else { 413 error = EINVAL; 414 goto bail; 415 } 416 } 417 418 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 419 goto bail; 420 421 if (crda) { 422 crda->crd_skip = 0; 423 crda->crd_len = cop->len; 424 crda->crd_inject = 0; /* ??? */ 425 426 crda->crd_alg = cse->mac; 427 crda->crd_key = cse->mackey; 428 crda->crd_klen = cse->mackeylen * 8; 429 } 430 431 if (crde) { 432 if (cop->op == COP_ENCRYPT) 433 crde->crd_flags |= CRD_F_ENCRYPT; 434 else 435 crde->crd_flags &= ~CRD_F_ENCRYPT; 436 crde->crd_len = cop->len; 437 crde->crd_inject = 0; 438 439 crde->crd_alg = cse->cipher; 440 crde->crd_key = cse->key; 441 crde->crd_klen = cse->keylen * 8; 442 } 443 444 crp->crp_ilen = cop->len; 445 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 446 | (cop->flags & COP_F_BATCH); 447 crp->crp_buf = (void *)&cse->uio; 448 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 449 crp->crp_sid = cse->sid; 450 crp->crp_opaque = (void *)cse; 451 452 if (cop->iv) { 453 if (crde == NULL) { 454 error = EINVAL; 455 goto bail; 456 } 457 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 458 error = EINVAL; 459 goto bail; 460 } 461 if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) 462 goto bail; 463 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 464 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 465 crde->crd_skip = 0; 466 } else if (crde) { 467 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 468 crde->crd_skip = 0; 469 } else { 470 crde->crd_flags |= CRD_F_IV_PRESENT; 471 crde->crd_skip = cse->txform->blocksize; 472 crde->crd_len -= cse->txform->blocksize; 473 } 474 } 475 476 if (cop->mac) { 477 if (crda == NULL) { 478 error = EINVAL; 479 goto bail; 480 } 481 crp->crp_mac=cse->tmp_mac; 482 } 483 484 /* 485 * XXX there was a comment here which said that we went to 486 * XXX splcrypto() but needed to only if CRYPTO_F_CBIMM, 487 * XXX disabled on NetBSD since 1.6O due to a race condition. 488 * XXX But crypto_dispatch went to splcrypto() itself! (And 489 * XXX now takes the crypto_mtx mutex itself). We do, however, 490 * XXX need to hold the mutex across the call to cv_wait(). 491 * XXX (should we arrange for crypto_dispatch to return to 492 * XXX us with it held? it seems quite ugly to do so.) 493 */ 494 error = crypto_dispatch(crp); 495 mutex_spin_enter(&crypto_mtx); 496 if (error != 0) { 497 DPRINTF(("cryptodev_op: not waiting, error.\n")); 498 mutex_spin_exit(&crypto_mtx); 499 goto bail; 500 } 501 while (!(crp->crp_flags & CRYPTO_F_DONE)) { 502 DPRINTF(("cryptodev_op: sleeping on cv %08x for crp %08x\n", \ 503 (uint32_t)&crp->crp_cv, (uint32_t)crp)); 504 cv_wait(&crp->crp_cv, &crypto_mtx); /* XXX cv_wait_sig? */ 505 } 506 if (crp->crp_flags & CRYPTO_F_ONRETQ) { 507 DPRINTF(("cryptodev_op: DONE, not woken by cryptoret.\n")); 508 (void)crypto_ret_q_remove(crp); 509 } 510 mutex_spin_exit(&crypto_mtx); 511 512 if (crp->crp_etype != 0) { 513 DPRINTF(("cryptodev_op: crp_etype %d\n", crp->crp_etype)); 514 error = crp->crp_etype; 515 goto bail; 516 } 517 518 if (cse->error) { 519 DPRINTF(("cryptodev_op: cse->error %d\n", cse->error)); 520 error = cse->error; 521 goto bail; 522 } 523 524 if (cop->dst && 525 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) { 526 DPRINTF(("cryptodev_op: copyout error %d\n", error)); 527 goto bail; 528 } 529 530 if (cop->mac && 531 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) { 532 DPRINTF(("cryptodev_op: mac copyout error %d\n", error)); 533 goto bail; 534 } 535 536 bail: 537 if (crp) 538 crypto_freereq(crp); 539 if (cse->uio.uio_iov[0].iov_base) 540 free(cse->uio.uio_iov[0].iov_base, M_XDATA); 541 542 return (error); 543 } 544 545 static int 546 cryptodev_cb(void *op) 547 { 548 struct cryptop *crp = (struct cryptop *) op; 549 struct csession *cse = (struct csession *)crp->crp_opaque; 550 int error = 0; 551 552 mutex_spin_enter(&crypto_mtx); 553 cse->error = crp->crp_etype; 554 if (crp->crp_etype == EAGAIN) { 555 /* always drop mutex to call dispatch routine */ 556 mutex_spin_exit(&crypto_mtx); 557 error = crypto_dispatch(crp); 558 mutex_spin_enter(&crypto_mtx); 559 } 560 if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) { 561 cv_signal(&crp->crp_cv); 562 } 563 mutex_spin_exit(&crypto_mtx); 564 return (0); 565 } 566 567 static int 568 cryptodevkey_cb(void *op) 569 { 570 struct cryptkop *krp = (struct cryptkop *) op; 571 572 mutex_spin_enter(&crypto_mtx); 573 cv_signal(&krp->krp_cv); 574 mutex_spin_exit(&crypto_mtx); 575 return (0); 576 } 577 578 static int 579 cryptodev_key(struct crypt_kop *kop) 580 { 581 struct cryptkop *krp = NULL; 582 int error = EINVAL; 583 int in, out, size, i; 584 585 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 586 return (EFBIG); 587 } 588 589 in = kop->crk_iparams; 590 out = kop->crk_oparams; 591 switch (kop->crk_op) { 592 case CRK_MOD_EXP: 593 if (in == 3 && out == 1) 594 break; 595 return (EINVAL); 596 case CRK_MOD_EXP_CRT: 597 if (in == 6 && out == 1) 598 break; 599 return (EINVAL); 600 case CRK_DSA_SIGN: 601 if (in == 5 && out == 2) 602 break; 603 return (EINVAL); 604 case CRK_DSA_VERIFY: 605 if (in == 7 && out == 0) 606 break; 607 return (EINVAL); 608 case CRK_DH_COMPUTE_KEY: 609 if (in == 3 && out == 1) 610 break; 611 return (EINVAL); 612 case CRK_MOD_ADD: 613 if (in == 3 && out == 1) 614 break; 615 return (EINVAL); 616 case CRK_MOD_ADDINV: 617 if (in == 2 && out == 1) 618 break; 619 return (EINVAL); 620 case CRK_MOD_SUB: 621 if (in == 3 && out == 1) 622 break; 623 return (EINVAL); 624 case CRK_MOD_MULT: 625 if (in == 3 && out == 1) 626 break; 627 return (EINVAL); 628 case CRK_MOD_MULTINV: 629 if (in == 2 && out == 1) 630 break; 631 return (EINVAL); 632 case CRK_MOD: 633 if (in == 2 && out == 1) 634 break; 635 return (EINVAL); 636 default: 637 return (EINVAL); 638 } 639 640 krp = pool_get(&cryptkop_pool, PR_WAITOK); 641 if (!krp) 642 return (ENOMEM); 643 bzero(krp, sizeof *krp); 644 cv_init(&krp->krp_cv, "crykdev"); 645 krp->krp_op = kop->crk_op; 646 krp->krp_status = kop->crk_status; 647 krp->krp_iparams = kop->crk_iparams; 648 krp->krp_oparams = kop->crk_oparams; 649 krp->krp_status = 0; 650 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 651 652 for (i = 0; i < CRK_MAXPARAM; i++) 653 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 654 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 655 size = (krp->krp_param[i].crp_nbits + 7) / 8; 656 if (size == 0) 657 continue; 658 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 659 if (i >= krp->krp_iparams) 660 continue; 661 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 662 if (error) 663 goto fail; 664 } 665 666 error = crypto_kdispatch(krp); 667 if (error != 0) { 668 goto fail; 669 } 670 671 mutex_spin_enter(&crypto_mtx); 672 while (!(krp->krp_flags & CRYPTO_F_DONE)) { 673 cv_wait(&krp->krp_cv, &crypto_mtx); /* XXX cv_wait_sig? */ 674 } 675 if (krp->krp_flags & CRYPTO_F_ONRETQ) { 676 DPRINTF(("cryptodev_key: DONE early, not via cryptoret.\n")); 677 (void)crypto_ret_kq_remove(krp); 678 } 679 mutex_spin_exit(&crypto_mtx); 680 681 if (krp->krp_status != 0) { 682 DPRINTF(("cryptodev_key: krp->krp_status 0x%08x\n", krp->krp_status)); 683 error = krp->krp_status; 684 goto fail; 685 } 686 687 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 688 size = (krp->krp_param[i].crp_nbits + 7) / 8; 689 if (size == 0) 690 continue; 691 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 692 if (error) { 693 DPRINTF(("cryptodev_key: copyout oparam %d failed, error=%d\n", i-krp->krp_iparams, error)); 694 goto fail; 695 } 696 } 697 698 fail: 699 if (krp) { 700 kop->crk_status = krp->krp_status; 701 for (i = 0; i < CRK_MAXPARAM; i++) { 702 if (krp->krp_param[i].crp_p) 703 FREE(krp->krp_param[i].crp_p, M_XDATA); 704 } 705 pool_put(&cryptkop_pool, krp); 706 } 707 DPRINTF(("cryptodev_key: error=0x%08x\n", error)); 708 return (error); 709 } 710 711 /* ARGSUSED */ 712 static int 713 cryptof_close(file_t *fp) 714 { 715 struct fcrypt *fcr = fp->f_data; 716 struct csession *cse; 717 718 mutex_spin_enter(&crypto_mtx); 719 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 720 TAILQ_REMOVE(&fcr->csessions, cse, next); 721 (void)csefree(cse); 722 } 723 pool_put(&fcrpl, fcr); 724 725 fp->f_data = NULL; 726 mutex_spin_exit(&crypto_mtx); 727 728 return 0; 729 } 730 731 /* csefind: call with crypto_mtx held. */ 732 static struct csession * 733 csefind(struct fcrypt *fcr, u_int ses) 734 { 735 struct csession *cse, *ret = NULL; 736 737 KASSERT(mutex_owned(&crypto_mtx)); 738 TAILQ_FOREACH(cse, &fcr->csessions, next) 739 if (cse->ses == ses) 740 ret = cse; 741 return (ret); 742 } 743 744 /* csedelete: call with crypto_mtx held. */ 745 static int 746 csedelete(struct fcrypt *fcr, struct csession *cse_del) 747 { 748 struct csession *cse; 749 int ret = 0; 750 751 KASSERT(mutex_owned(&crypto_mtx)); 752 TAILQ_FOREACH(cse, &fcr->csessions, next) { 753 if (cse == cse_del) { 754 TAILQ_REMOVE(&fcr->csessions, cse, next); 755 ret = 1; 756 } 757 } 758 return (ret); 759 } 760 761 /* cseadd: call with crypto_mtx held. */ 762 static struct csession * 763 cseadd(struct fcrypt *fcr, struct csession *cse) 764 { 765 KASSERT(mutex_owned(&crypto_mtx)); 766 /* don't let session ID wrap! */ 767 if (fcr->sesn + 1 == 0) return NULL; 768 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 769 cse->ses = fcr->sesn++; 770 return (cse); 771 } 772 773 /* csecreate: call with crypto_mtx held. */ 774 static struct csession * 775 csecreate(struct fcrypt *fcr, u_int64_t sid, void *key, u_int64_t keylen, 776 void *mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 777 struct enc_xform *txform, struct auth_hash *thash) 778 { 779 struct csession *cse; 780 781 KASSERT(mutex_owned(&crypto_mtx)); 782 cse = pool_get(&csepl, PR_NOWAIT); 783 if (cse == NULL) 784 return NULL; 785 cse->key = key; 786 cse->keylen = keylen/8; 787 cse->mackey = mackey; 788 cse->mackeylen = mackeylen/8; 789 cse->sid = sid; 790 cse->cipher = cipher; 791 cse->mac = mac; 792 cse->txform = txform; 793 cse->thash = thash; 794 cse->error = 0; 795 if (cseadd(fcr, cse)) 796 return (cse); 797 else { 798 pool_put(&csepl, cse); 799 return NULL; 800 } 801 } 802 803 /* csefree: call with crypto_mtx held. */ 804 static int 805 csefree(struct csession *cse) 806 { 807 int error; 808 809 KASSERT(mutex_owned(&crypto_mtx)); 810 error = crypto_freesession(cse->sid); 811 if (cse->key) 812 FREE(cse->key, M_XDATA); 813 if (cse->mackey) 814 FREE(cse->mackey, M_XDATA); 815 pool_put(&csepl, cse); 816 return (error); 817 } 818 819 static int 820 cryptoopen(dev_t dev, int flag, int mode, 821 struct lwp *l) 822 { 823 file_t *fp; 824 struct fcrypt *fcr; 825 int fd, error; 826 827 if (crypto_usercrypto == 0) 828 return (ENXIO); 829 830 if ((error = fd_allocfile(&fp, &fd)) != 0) 831 return error; 832 833 fcr = pool_get(&fcrpl, PR_WAITOK); 834 mutex_spin_enter(&crypto_mtx); 835 TAILQ_INIT(&fcr->csessions); 836 /* 837 * Don't ever return session 0, to allow detection of 838 * failed creation attempts with multi-create ioctl. 839 */ 840 fcr->sesn = 1; 841 mutex_spin_exit(&crypto_mtx); 842 return fd_clone(fp, fd, flag, &cryptofops, fcr); 843 } 844 845 static int 846 cryptoread(dev_t dev, struct uio *uio, int ioflag) 847 { 848 return (EIO); 849 } 850 851 static int 852 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 853 { 854 return (EIO); 855 } 856 857 int 858 cryptoselect(dev_t dev, int rw, struct lwp *l) 859 { 860 return (0); 861 } 862 863 /*static*/ 864 struct cdevsw crypto_cdevsw = { 865 /* open */ cryptoopen, 866 /* close */ noclose, 867 /* read */ cryptoread, 868 /* write */ cryptowrite, 869 /* ioctl */ noioctl, 870 /* ttstop?*/ nostop, 871 /* ??*/ notty, 872 /* poll */ cryptoselect /*nopoll*/, 873 /* mmap */ nommap, 874 /* kqfilter */ nokqfilter, 875 /* type */ D_OTHER, 876 }; 877 878 /* 879 * Pseudo-device initialization routine for /dev/crypto 880 */ 881 void cryptoattach(int); 882 883 void 884 cryptoattach(int num) 885 { 886 pool_init(&fcrpl, sizeof(struct fcrypt), 0, 0, 0, "fcrpl", 887 NULL, IPL_NET); /* XXX IPL_NET ("splcrypto") */ 888 pool_init(&csepl, sizeof(struct csession), 0, 0, 0, "csepl", 889 NULL, IPL_NET); /* XXX IPL_NET ("splcrypto") */ 890 891 /* 892 * Preallocate space for 64 users, with 5 sessions each. 893 * (consider that a TLS protocol session requires at least 894 * 3DES, MD5, and SHA1 (both hashes are used in the PRF) for 895 * the negotiation, plus HMAC_SHA1 for the actual SSL records, 896 * consuming one session here for each algorithm. 897 */ 898 pool_prime(&fcrpl, 64); 899 pool_prime(&csepl, 64 * 5); 900 } 901
Indexes created Wed Sep 24 02:09:48 GMT 2025