cryptodev.c revision 1.38
1 /* $NetBSD: cryptodev.c,v 1.38 2008/04/11 10:28:10 rmind 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) 2008 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Coyote Point Systems, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /* 42 * Copyright (c) 2001 Theo de Raadt 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. The name of the author may not be used to endorse or promote products 54 * derived from this software without specific prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 57 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 58 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 59 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 60 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 61 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 62 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 63 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 64 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 65 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 66 * 67 * Effort sponsored in part by the Defense Advanced Research Projects 68 * Agency (DARPA) and Air Force Research Laboratory, Air Force 69 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 70 * 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: cryptodev.c,v 1.38 2008/04/11 10:28:10 rmind Exp $"); 75 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/kmem.h> 79 #include <sys/malloc.h> 80 #include <sys/mbuf.h> 81 #include <sys/pool.h> 82 #include <sys/sysctl.h> 83 #include <sys/file.h> 84 #include <sys/filedesc.h> 85 #include <sys/errno.h> 86 #include <sys/md5.h> 87 #include <sys/sha1.h> 88 #include <sys/conf.h> 89 #include <sys/device.h> 90 #include <sys/kauth.h> 91 #include <sys/select.h> 92 #include <sys/poll.h> 93 #include <sys/atomic.h> 94 95 #include "opt_ocf.h" 96 #include <opencrypto/cryptodev.h> 97 #include <opencrypto/xform.h> 98 99 struct csession { 100 TAILQ_ENTRY(csession) next; 101 u_int64_t sid; 102 u_int32_t ses; 103 104 u_int32_t cipher; 105 struct enc_xform *txform; 106 u_int32_t mac; 107 struct auth_hash *thash; 108 109 void * key; 110 int keylen; 111 u_char tmp_iv[EALG_MAX_BLOCK_LEN]; 112 113 void * mackey; 114 int mackeylen; 115 u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; 116 117 struct iovec iovec[1]; /* user requests never have more */ 118 struct uio uio; 119 int error; 120 }; 121 122 struct fcrypt { 123 TAILQ_HEAD(csessionlist, csession) csessions; 124 TAILQ_HEAD(crprethead, cryptop) crp_ret_mq; 125 TAILQ_HEAD(krprethead, cryptkop) crp_ret_mkq; 126 int sesn; 127 struct selinfo sinfo; 128 u_int32_t requestid; 129 }; 130 131 /* For our fixed-size allocations */ 132 static struct pool fcrpl; 133 static struct pool csepl; 134 135 /* Declaration of master device (fd-cloning/ctxt-allocating) entrypoints */ 136 static int cryptoopen(dev_t dev, int flag, int mode, struct lwp *l); 137 static int cryptoread(dev_t dev, struct uio *uio, int ioflag); 138 static int cryptowrite(dev_t dev, struct uio *uio, int ioflag); 139 static int cryptoselect(dev_t dev, int rw, struct lwp *l); 140 141 /* Declaration of cloned-device (per-ctxt) entrypoints */ 142 static int cryptof_read(struct file *, off_t *, struct uio *, 143 kauth_cred_t, int); 144 static int cryptof_write(struct file *, off_t *, struct uio *, 145 kauth_cred_t, int); 146 static int cryptof_ioctl(struct file *, u_long, void *); 147 static int cryptof_close(struct file *); 148 static int cryptof_poll(struct file *, int); 149 150 static const struct fileops cryptofops = { 151 cryptof_read, 152 cryptof_write, 153 cryptof_ioctl, 154 fnullop_fcntl, 155 cryptof_poll, 156 fbadop_stat, 157 cryptof_close, 158 fnullop_kqfilter 159 }; 160 161 static struct csession *csefind(struct fcrypt *, u_int); 162 static int csedelete(struct fcrypt *, struct csession *); 163 static struct csession *cseadd(struct fcrypt *, struct csession *); 164 static struct csession *csecreate(struct fcrypt *, u_int64_t, void *, u_int64_t, 165 void *, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, 166 struct auth_hash *); 167 static int csefree(struct csession *); 168 169 static int cryptodev_op(struct csession *, struct crypt_op *, struct lwp *); 170 static int cryptodev_mop(struct fcrypt *, struct crypt_n_op *, int, struct 171 lwp *); 172 static int cryptodev_key(struct crypt_kop *); 173 static int cryptodev_mkey(struct fcrypt *, struct crypt_n_kop *, int); 174 static int cryptodev_session(struct fcrypt *, struct session_op *); 175 static int cryptodev_msession(struct fcrypt *, struct session_n_op *, 176 int); 177 static int cryptodev_msessionfin(struct fcrypt *, int, u_int32_t *); 178 179 static int cryptodev_cb(void *); 180 static int cryptodevkey_cb(void *); 181 182 static int cryptodev_mcb(void *); 183 static int cryptodevkey_mcb(void *); 184 185 static int cryptodev_getmstatus(struct fcrypt *, struct crypt_result *, 186 int); 187 static int cryptodev_getstatus(struct fcrypt *, struct crypt_result *); 188 189 /* 190 * sysctl-able control variables for /dev/crypto now defined in crypto.c: 191 * crypto_usercrypto, crypto_userasmcrypto, crypto_devallowsoft. 192 */ 193 194 /* ARGSUSED */ 195 int 196 cryptof_read(file_t *fp, off_t *poff, 197 struct uio *uio, kauth_cred_t cred, int flags) 198 { 199 return (EIO); 200 } 201 202 /* ARGSUSED */ 203 int 204 cryptof_write(file_t *fp, off_t *poff, 205 struct uio *uio, kauth_cred_t cred, int flags) 206 { 207 return (EIO); 208 } 209 210 /* ARGSUSED */ 211 int 212 cryptof_ioctl(struct file *fp, u_long cmd, void *data) 213 { 214 struct fcrypt *fcr = fp->f_data; 215 struct csession *cse; 216 struct session_op *sop; 217 struct session_n_op *snop; 218 struct crypt_op *cop; 219 struct crypt_mop *mop; 220 struct crypt_mkop *mkop; 221 struct crypt_n_op *cnop; 222 struct crypt_n_kop *knop; 223 struct crypt_sgop *sgop; 224 struct crypt_sfop *sfop; 225 struct cryptret *crypt_ret; 226 struct crypt_result *crypt_res; 227 u_int32_t ses; 228 u_int32_t *sesid; 229 int error = 0; 230 size_t count; 231 232 /* backwards compatibility */ 233 file_t *criofp; 234 struct fcrypt *criofcr; 235 int criofd; 236 237 switch (cmd) { 238 case CRIOGET: /* XXX deprecated, remove after 5.0 */ 239 if ((error = fd_allocfile(&criofp, &criofd)) != 0) 240 return error; 241 criofcr = pool_get(&fcrpl, PR_WAITOK); 242 if (criofcr == NULL) { 243 fd_abort(curproc, criofp, criofd); 244 return ENOMEM; 245 } 246 mutex_spin_enter(&crypto_mtx); 247 TAILQ_INIT(&criofcr->csessions); 248 TAILQ_INIT(&criofcr->crp_ret_mq); 249 TAILQ_INIT(&criofcr->crp_ret_mkq); 250 selinit(&criofcr->sinfo); 251 252 /* 253 * Don't ever return session 0, to allow detection of 254 * failed creation attempts with multi-create ioctl. 255 */ 256 criofcr->sesn = 1; 257 criofcr->requestid = 1; 258 mutex_spin_exit(&crypto_mtx); 259 (void)fd_clone(criofp, criofd, (FREAD|FWRITE), 260 &cryptofops, criofcr); 261 *(u_int32_t *)data = criofd; 262 return error; 263 break; 264 case CIOCGSESSION: 265 sop = (struct session_op *)data; 266 error = cryptodev_session(fcr, sop); 267 break; 268 case CIOCNGSESSION: 269 sgop = (struct crypt_sgop *)data; 270 snop = kmem_alloc((sgop->count * 271 sizeof(struct session_n_op)), KM_SLEEP); 272 if (!snop) { 273 error = EINVAL; 274 goto mbail; 275 } 276 error = copyin(sgop->sessions, snop, sgop->count * 277 sizeof(struct session_n_op)); 278 if (error) { 279 goto mbail; 280 } 281 282 error = cryptodev_msession(fcr, snop, sgop->count); 283 if (error) { 284 goto mbail; 285 } 286 287 error = copyout(snop, sgop->sessions, sgop->count * 288 sizeof(struct session_n_op)); 289 mbail: 290 if(snop) { 291 kmem_free(snop, sgop->count * 292 sizeof(struct session_n_op)); 293 } 294 break; 295 case CIOCFSESSION: 296 mutex_spin_enter(&crypto_mtx); 297 ses = *(u_int32_t *)data; 298 cse = csefind(fcr, ses); 299 if (cse == NULL) 300 return (EINVAL); 301 csedelete(fcr, cse); 302 error = csefree(cse); 303 mutex_spin_exit(&crypto_mtx); 304 break; 305 case CIOCNFSESSION: 306 sfop = (struct crypt_sfop *)data; 307 sesid = kmem_alloc((sfop->count * sizeof(u_int32_t)), 308 KM_SLEEP); 309 if (!sesid) 310 return (EINVAL); 311 error = copyin(sfop->sesid, sesid, 312 (sfop->count * sizeof(u_int32_t))); 313 if (!error) { 314 error = cryptodev_msessionfin(fcr, sfop->count, sesid); 315 } 316 kmem_free(sesid, (sfop->count * sizeof(u_int32_t))); 317 break; 318 case CIOCCRYPT: 319 mutex_spin_enter(&crypto_mtx); 320 cop = (struct crypt_op *)data; 321 cse = csefind(fcr, cop->ses); 322 mutex_spin_exit(&crypto_mtx); 323 if (cse == NULL) { 324 DPRINTF(("csefind failed\n")); 325 return (EINVAL); 326 } 327 error = cryptodev_op(cse, cop, curlwp); 328 DPRINTF(("cryptodev_op error = %d\n", error)); 329 break; 330 case CIOCNCRYPTM: 331 mop = (struct crypt_mop *)data; 332 cnop = kmem_alloc((mop->count * sizeof(struct crypt_n_op)), 333 KM_SLEEP); 334 if(!cnop) { 335 return(EINVAL); 336 } 337 error = copyin(mop->reqs, cnop, 338 (mop->count * sizeof(struct crypt_n_op))); 339 if(!error) { 340 error = cryptodev_mop(fcr, cnop, mop->count, 341 curlwp); 342 if (!error) { 343 error = copyout(cnop, mop->reqs, 344 (mop->count * 345 sizeof(struct crypt_n_op))); 346 } 347 } 348 kmem_free(cnop, (mop->count * sizeof(struct crypt_n_op))); 349 break; 350 case CIOCKEY: 351 error = cryptodev_key((struct crypt_kop *)data); 352 DPRINTF(("cryptodev_key error = %d\n", error)); 353 break; 354 case CIOCNFKEYM: 355 mkop = (struct crypt_mkop *)data; 356 knop = kmem_alloc((mkop->count * sizeof(struct crypt_n_kop)), 357 KM_SLEEP); 358 if (!knop) { 359 return(EINVAL); 360 } 361 error = copyin(mkop->reqs, knop, 362 (mkop->count * sizeof(struct crypt_n_kop))); 363 if (!error) { 364 error = cryptodev_mkey(fcr, knop, mkop->count); 365 if (!error) 366 error = copyout(knop, mkop->reqs, 367 (mkop->count * 368 sizeof(struct crypt_n_kop))); 369 } 370 kmem_free(knop, (mkop->count * sizeof(struct crypt_n_kop))); 371 break; 372 case CIOCASYMFEAT: 373 error = crypto_getfeat((int *)data); 374 break; 375 case CIOCNCRYPTRETM: 376 crypt_ret = (struct cryptret *)data; 377 count = crypt_ret->count; 378 crypt_res = kmem_alloc((count * 379 sizeof(struct crypt_result)), 380 KM_SLEEP); 381 if(!crypt_res) 382 return(EINVAL); 383 error = copyin(crypt_ret->results, crypt_res, 384 (count * sizeof(struct crypt_result))); 385 if (error) 386 goto reterr; 387 crypt_ret->count = cryptodev_getmstatus(fcr, crypt_res, 388 crypt_ret->count); 389 /* sanity check count */ 390 if (crypt_ret->count > count) { 391 printf("%s.%d: error returned count %zd > original " 392 " count %zd\n", 393 __FILE__, __LINE__, crypt_ret->count, count); 394 crypt_ret->count = count; 395 396 } 397 error = copyout(crypt_res, crypt_ret->results, 398 (crypt_ret->count * sizeof(struct crypt_result))); 399 reterr: 400 kmem_free(crypt_res, 401 (count * sizeof(struct crypt_result))); 402 break; 403 case CIOCNCRYPTRET: 404 error = cryptodev_getstatus(fcr, (struct crypt_result *)data); 405 break; 406 default: 407 DPRINTF(("invalid ioctl cmd %ld\n", cmd)); 408 error = EINVAL; 409 } 410 return (error); 411 } 412 413 static int 414 cryptodev_op(struct csession *cse, struct crypt_op *cop, struct lwp *l) 415 { 416 struct cryptop *crp = NULL; 417 struct cryptodesc *crde = NULL, *crda = NULL; 418 int error; 419 420 if (cop->len > 256*1024-4) 421 return (E2BIG); 422 423 if (cse->txform) { 424 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) 425 return (EINVAL); 426 } 427 428 bzero(&cse->uio, sizeof(cse->uio)); 429 cse->uio.uio_iovcnt = 1; 430 cse->uio.uio_resid = 0; 431 cse->uio.uio_rw = UIO_WRITE; 432 cse->uio.uio_iov = cse->iovec; 433 UIO_SETUP_SYSSPACE(&cse->uio); 434 memset(&cse->iovec, 0, sizeof(cse->iovec)); 435 cse->uio.uio_iov[0].iov_len = cop->len; 436 cse->uio.uio_iov[0].iov_base = kmem_alloc(cop->len, KM_SLEEP); 437 cse->uio.uio_resid = cse->uio.uio_iov[0].iov_len; 438 439 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 440 if (crp == NULL) { 441 error = ENOMEM; 442 goto bail; 443 } 444 445 if (cse->thash) { 446 crda = crp->crp_desc; 447 if (cse->txform) 448 crde = crda->crd_next; 449 } else { 450 if (cse->txform) 451 crde = crp->crp_desc; 452 else { 453 error = EINVAL; 454 goto bail; 455 } 456 } 457 458 if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) 459 { 460 printf("copyin failed %s %d \n", (char *)cop->src, error); 461 goto bail; 462 } 463 464 if (crda) { 465 crda->crd_skip = 0; 466 crda->crd_len = cop->len; 467 crda->crd_inject = 0; /* ??? */ 468 469 crda->crd_alg = cse->mac; 470 crda->crd_key = cse->mackey; 471 crda->crd_klen = cse->mackeylen * 8; 472 } 473 474 if (crde) { 475 if (cop->op == COP_ENCRYPT) 476 crde->crd_flags |= CRD_F_ENCRYPT; 477 else 478 crde->crd_flags &= ~CRD_F_ENCRYPT; 479 crde->crd_len = cop->len; 480 crde->crd_inject = 0; 481 482 crde->crd_alg = cse->cipher; 483 crde->crd_key = cse->key; 484 crde->crd_klen = cse->keylen * 8; 485 } 486 487 crp->crp_ilen = cop->len; 488 crp->crp_flags = CRYPTO_F_IOV | (cop->flags & COP_F_BATCH); 489 crp->crp_buf = (void *)&cse->uio; 490 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; 491 crp->crp_sid = cse->sid; 492 crp->crp_opaque = (void *)cse; 493 494 if (cop->iv) { 495 if (crde == NULL) { 496 error = EINVAL; 497 goto bail; 498 } 499 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 500 error = EINVAL; 501 goto bail; 502 } 503 if ((error = copyin(cop->iv, cse->tmp_iv, 504 cse->txform->blocksize))) 505 goto bail; 506 bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); 507 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 508 crde->crd_skip = 0; 509 } else if (crde) { 510 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 511 crde->crd_skip = 0; 512 } else { 513 crde->crd_flags |= CRD_F_IV_PRESENT; 514 crde->crd_skip = cse->txform->blocksize; 515 crde->crd_len -= cse->txform->blocksize; 516 } 517 } 518 519 if (cop->mac) { 520 if (crda == NULL) { 521 error = EINVAL; 522 goto bail; 523 } 524 crp->crp_mac=cse->tmp_mac; 525 } 526 527 /* 528 * XXX there was a comment here which said that we went to 529 * XXX splcrypto() but needed to only if CRYPTO_F_CBIMM, 530 * XXX disabled on NetBSD since 1.6O due to a race condition. 531 * XXX But crypto_dispatch went to splcrypto() itself! (And 532 * XXX now takes the crypto_mtx mutex itself). We do, however, 533 * XXX need to hold the mutex across the call to cv_wait(). 534 * XXX (should we arrange for crypto_dispatch to return to 535 * XXX us with it held? it seems quite ugly to do so.) 536 */ 537 #ifdef notyet 538 eagain: 539 #endif 540 error = crypto_dispatch(crp); 541 mutex_spin_enter(&crypto_mtx); 542 543 switch (error) { 544 #ifdef notyet /* don't loop forever -- but EAGAIN not possible here yet */ 545 case EAGAIN: 546 mutex_spin_exit(&crypto_mtx); 547 goto eagain; 548 break; 549 #endif 550 case 0: 551 break; 552 default: 553 DPRINTF(("cryptodev_op: not waiting, error.\n")); 554 mutex_spin_exit(&crypto_mtx); 555 goto bail; 556 } 557 558 while (!(crp->crp_flags & CRYPTO_F_DONE)) { 559 DPRINTF(("cryptodev_op: sleeping on cv %08x for crp %08x\n", \ 560 (uint32_t)&crp->crp_cv, (uint32_t)crp)); 561 cv_wait(&crp->crp_cv, &crypto_mtx); /* XXX cv_wait_sig? */ 562 } 563 if (crp->crp_flags & CRYPTO_F_ONRETQ) { 564 DPRINTF(("cryptodev_op: DONE, not woken by cryptoret.\n")); 565 (void)crypto_ret_q_remove(crp); 566 } 567 mutex_spin_exit(&crypto_mtx); 568 569 if (crp->crp_etype != 0) { 570 DPRINTF(("cryptodev_op: crp_etype %d\n", crp->crp_etype)); 571 error = crp->crp_etype; 572 goto bail; 573 } 574 575 if (cse->error) { 576 DPRINTF(("cryptodev_op: cse->error %d\n", cse->error)); 577 error = cse->error; 578 goto bail; 579 } 580 581 if (cop->dst && 582 (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) 583 { 584 DPRINTF(("cryptodev_op: copyout error %d\n", error)); 585 goto bail; 586 } 587 588 if (cop->mac && 589 (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) { 590 DPRINTF(("cryptodev_op: mac copyout error %d\n", error)); 591 goto bail; 592 } 593 594 bail: 595 if (crp) 596 crypto_freereq(crp); 597 if (cse->uio.uio_iov[0].iov_base) 598 kmem_free(cse->uio.uio_iov[0].iov_base, 599 cse->uio.uio_iov[0].iov_len); 600 601 return (error); 602 } 603 604 static int 605 cryptodev_cb(void *op) 606 { 607 struct cryptop *crp = (struct cryptop *) op; 608 struct csession *cse = (struct csession *)crp->crp_opaque; 609 int error = 0; 610 611 mutex_spin_enter(&crypto_mtx); 612 cse->error = crp->crp_etype; 613 if (crp->crp_etype == EAGAIN) { 614 /* always drop mutex to call dispatch routine */ 615 mutex_spin_exit(&crypto_mtx); 616 error = crypto_dispatch(crp); 617 mutex_spin_enter(&crypto_mtx); 618 } 619 if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) { 620 cv_signal(&crp->crp_cv); 621 } 622 mutex_spin_exit(&crypto_mtx); 623 return (0); 624 } 625 626 static int 627 cryptodev_mcb(void *op) 628 { 629 struct cryptop *crp = (struct cryptop *) op; 630 struct csession *cse = (struct csession *)crp->crp_opaque; 631 int error=0; 632 633 mutex_spin_enter(&crypto_mtx); 634 cse->error = crp->crp_etype; 635 if (crp->crp_etype == EAGAIN) { 636 mutex_spin_exit(&crypto_mtx); 637 error = crypto_dispatch(crp); 638 mutex_spin_enter(&crypto_mtx); 639 } 640 if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) { 641 cv_signal(&crp->crp_cv); 642 } 643 644 TAILQ_INSERT_TAIL(&crp->fcrp->crp_ret_mq, crp, crp_next); 645 selnotify(&crp->fcrp->sinfo, 0, 0); 646 mutex_spin_exit(&crypto_mtx); 647 return (0); 648 } 649 650 static int 651 cryptodevkey_cb(void *op) 652 { 653 struct cryptkop *krp = (struct cryptkop *) op; 654 655 mutex_spin_enter(&crypto_mtx); 656 cv_signal(&krp->krp_cv); 657 mutex_spin_exit(&crypto_mtx); 658 return (0); 659 } 660 661 static int 662 cryptodevkey_mcb(void *op) 663 { 664 struct cryptkop *krp = (struct cryptkop *) op; 665 666 mutex_spin_enter(&crypto_mtx); 667 cv_signal(&krp->krp_cv); 668 TAILQ_INSERT_TAIL(&krp->fcrp->crp_ret_mkq, krp, krp_next); 669 selnotify(&krp->fcrp->sinfo, 0, 0); 670 mutex_spin_exit(&crypto_mtx); 671 return (0); 672 } 673 674 static int 675 cryptodev_key(struct crypt_kop *kop) 676 { 677 struct cryptkop *krp = NULL; 678 int error = EINVAL; 679 int in, out, size, i; 680 681 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 682 return (EFBIG); 683 } 684 685 in = kop->crk_iparams; 686 out = kop->crk_oparams; 687 switch (kop->crk_op) { 688 case CRK_MOD_EXP: 689 if (in == 3 && out == 1) 690 break; 691 return (EINVAL); 692 case CRK_MOD_EXP_CRT: 693 if (in == 6 && out == 1) 694 break; 695 return (EINVAL); 696 case CRK_DSA_SIGN: 697 if (in == 5 && out == 2) 698 break; 699 return (EINVAL); 700 case CRK_DSA_VERIFY: 701 if (in == 7 && out == 0) 702 break; 703 return (EINVAL); 704 case CRK_DH_COMPUTE_KEY: 705 if (in == 3 && out == 1) 706 break; 707 return (EINVAL); 708 case CRK_MOD_ADD: 709 if (in == 3 && out == 1) 710 break; 711 return (EINVAL); 712 case CRK_MOD_ADDINV: 713 if (in == 2 && out == 1) 714 break; 715 return (EINVAL); 716 case CRK_MOD_SUB: 717 if (in == 3 && out == 1) 718 break; 719 return (EINVAL); 720 case CRK_MOD_MULT: 721 if (in == 3 && out == 1) 722 break; 723 return (EINVAL); 724 case CRK_MOD_MULTINV: 725 if (in == 2 && out == 1) 726 break; 727 return (EINVAL); 728 case CRK_MOD: 729 if (in == 2 && out == 1) 730 break; 731 return (EINVAL); 732 default: 733 return (EINVAL); 734 } 735 736 krp = pool_get(&cryptkop_pool, PR_WAITOK); 737 if (!krp) 738 return (ENOMEM); 739 bzero(krp, sizeof *krp); 740 cv_init(&krp->krp_cv, "crykdev"); 741 krp->krp_op = kop->crk_op; 742 krp->krp_status = kop->crk_status; 743 krp->krp_iparams = kop->crk_iparams; 744 krp->krp_oparams = kop->crk_oparams; 745 krp->krp_status = 0; 746 krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; 747 748 for (i = 0; i < CRK_MAXPARAM; i++) 749 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 750 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 751 size = (krp->krp_param[i].crp_nbits + 7) / 8; 752 if (size == 0) 753 continue; 754 krp->krp_param[i].crp_p = kmem_alloc(size, KM_SLEEP); 755 if (i >= krp->krp_iparams) 756 continue; 757 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 758 if (error) 759 goto fail; 760 } 761 762 error = crypto_kdispatch(krp); 763 if (error != 0) { 764 goto fail; 765 } 766 767 mutex_spin_enter(&crypto_mtx); 768 while (!(krp->krp_flags & CRYPTO_F_DONE)) { 769 cv_wait(&krp->krp_cv, &crypto_mtx); /* XXX cv_wait_sig? */ 770 } 771 if (krp->krp_flags & CRYPTO_F_ONRETQ) { 772 DPRINTF(("cryptodev_key: DONE early, not via cryptoret.\n")); 773 (void)crypto_ret_kq_remove(krp); 774 } 775 mutex_spin_exit(&crypto_mtx); 776 777 if (krp->krp_status != 0) { 778 DPRINTF(("cryptodev_key: krp->krp_status 0x%08x\n", krp->krp_status)); 779 error = krp->krp_status; 780 goto fail; 781 } 782 783 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 784 size = (krp->krp_param[i].crp_nbits + 7) / 8; 785 if (size == 0) 786 continue; 787 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 788 if (error) { 789 DPRINTF(("cryptodev_key: copyout oparam %d failed, error=%d\n", i-krp->krp_iparams, error)); 790 goto fail; 791 } 792 } 793 794 fail: 795 if (krp) { 796 kop->crk_status = krp->krp_status; 797 for (i = 0; i < CRK_MAXPARAM; i++) { 798 struct crparam *kp = &(krp->krp_param[i]); 799 if (krp->krp_param[i].crp_p) { 800 size = (kp->crp_nbits + 7) / 8; 801 KASSERT(size > 0); 802 memset(kp->crp_p, 0, size); 803 kmem_free(kp->crp_p, size); 804 } 805 } 806 pool_put(&cryptkop_pool, krp); 807 } 808 DPRINTF(("cryptodev_key: error=0x%08x\n", error)); 809 return (error); 810 } 811 812 /* ARGSUSED */ 813 static int 814 cryptof_close(struct file *fp) 815 { 816 struct fcrypt *fcr = fp->f_data; 817 struct csession *cse; 818 819 mutex_spin_enter(&crypto_mtx); 820 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 821 TAILQ_REMOVE(&fcr->csessions, cse, next); 822 (void)csefree(cse); 823 } 824 seldestroy(&fcr->sinfo); 825 fp->f_data = NULL; 826 mutex_spin_exit(&crypto_mtx); 827 828 pool_put(&fcrpl, fcr); 829 return 0; 830 } 831 832 /* csefind: call with crypto_mtx held. */ 833 static struct csession * 834 csefind(struct fcrypt *fcr, u_int ses) 835 { 836 struct csession *cse, *ret = NULL; 837 838 KASSERT(mutex_owned(&crypto_mtx)); 839 TAILQ_FOREACH(cse, &fcr->csessions, next) 840 if (cse->ses == ses) 841 ret = cse; 842 843 return (ret); 844 } 845 846 /* csedelete: call with crypto_mtx held. */ 847 static int 848 csedelete(struct fcrypt *fcr, struct csession *cse_del) 849 { 850 struct csession *cse; 851 int ret = 0; 852 853 KASSERT(mutex_owned(&crypto_mtx)); 854 TAILQ_FOREACH(cse, &fcr->csessions, next) { 855 if (cse == cse_del) { 856 TAILQ_REMOVE(&fcr->csessions, cse, next); 857 ret = 1; 858 } 859 } 860 return (ret); 861 } 862 863 /* cseadd: call with crypto_mtx held. */ 864 static struct csession * 865 cseadd(struct fcrypt *fcr, struct csession *cse) 866 { 867 KASSERT(mutex_owned(&crypto_mtx)); 868 /* don't let session ID wrap! */ 869 if (fcr->sesn + 1 == 0) return NULL; 870 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 871 cse->ses = fcr->sesn++; 872 return (cse); 873 } 874 875 /* csecreate: call with crypto_mtx held. */ 876 static struct csession * 877 csecreate(struct fcrypt *fcr, u_int64_t sid, void *key, u_int64_t keylen, 878 void *mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, 879 struct enc_xform *txform, struct auth_hash *thash) 880 { 881 struct csession *cse; 882 883 KASSERT(mutex_owned(&crypto_mtx)); 884 cse = pool_get(&csepl, PR_NOWAIT); 885 if (cse == NULL) 886 return NULL; 887 cse->key = key; 888 cse->keylen = keylen/8; 889 cse->mackey = mackey; 890 cse->mackeylen = mackeylen/8; 891 cse->sid = sid; 892 cse->cipher = cipher; 893 cse->mac = mac; 894 cse->txform = txform; 895 cse->thash = thash; 896 cse->error = 0; 897 if (cseadd(fcr, cse)) 898 return (cse); 899 else { 900 pool_put(&csepl, cse); 901 return NULL; 902 } 903 } 904 905 /* csefree: call with crypto_mtx held. */ 906 static int 907 csefree(struct csession *cse) 908 { 909 int error; 910 911 KASSERT(mutex_owned(&crypto_mtx)); 912 error = crypto_freesession(cse->sid); 913 if (cse->key) 914 free(cse->key, M_XDATA); 915 if (cse->mackey) 916 free(cse->mackey, M_XDATA); 917 pool_put(&csepl, cse); 918 return (error); 919 } 920 921 static int 922 cryptoopen(dev_t dev, int flag, int mode, 923 struct lwp *l) 924 { 925 file_t *fp; 926 struct fcrypt *fcr; 927 int fd, error; 928 929 if (crypto_usercrypto == 0) 930 return (ENXIO); 931 932 if ((error = fd_allocfile(&fp, &fd)) != 0) 933 return error; 934 935 fcr = pool_get(&fcrpl, PR_WAITOK); 936 if (fcr == NULL) { 937 fd_abort(curproc, fp, fd); 938 return ENOMEM; 939 } 940 mutex_spin_enter(&crypto_mtx); 941 TAILQ_INIT(&fcr->csessions); 942 TAILQ_INIT(&fcr->crp_ret_mq); 943 TAILQ_INIT(&fcr->crp_ret_mkq); 944 selinit(&fcr->sinfo); 945 /* 946 * Don't ever return session 0, to allow detection of 947 * failed creation attempts with multi-create ioctl. 948 */ 949 fcr->sesn = 1; 950 fcr->requestid = 1; 951 mutex_spin_exit(&crypto_mtx); 952 return fd_clone(fp, fd, flag, &cryptofops, fcr); 953 } 954 955 static int 956 cryptoread(dev_t dev, struct uio *uio, int ioflag) 957 { 958 return (EIO); 959 } 960 961 static int 962 cryptowrite(dev_t dev, struct uio *uio, int ioflag) 963 { 964 return (EIO); 965 } 966 967 int 968 cryptoselect(dev_t dev, int rw, struct lwp *l) 969 { 970 return (0); 971 } 972 973 /*static*/ 974 struct cdevsw crypto_cdevsw = { 975 /* open */ cryptoopen, 976 /* close */ noclose, 977 /* read */ cryptoread, 978 /* write */ cryptowrite, 979 /* ioctl */ noioctl, 980 /* ttstop?*/ nostop, 981 /* ??*/ notty, 982 /* poll */ cryptoselect /*nopoll*/, 983 /* mmap */ nommap, 984 /* kqfilter */ nokqfilter, 985 /* type */ D_OTHER, 986 }; 987 988 static int 989 cryptodev_mop(struct fcrypt *fcr, 990 struct crypt_n_op * cnop, 991 int count, struct lwp *l) 992 { 993 struct cryptop *crp = NULL; 994 struct cryptodesc *crde = NULL, *crda = NULL; 995 int req, error=0; 996 struct csession *cse; 997 998 for (req = 0; req < count; req++) { 999 mutex_spin_enter(&crypto_mtx); 1000 cse = csefind(fcr, cnop[req].ses); 1001 if (cse == NULL) { 1002 DPRINTF(("csefind failed\n")); 1003 cnop[req].status = EINVAL; 1004 mutex_spin_exit(&crypto_mtx); 1005 continue; 1006 } 1007 mutex_spin_exit(&crypto_mtx); 1008 1009 if (cnop[req].len > 256*1024-4) { 1010 DPRINTF(("length failed\n")); 1011 cnop[req].status = EINVAL; 1012 continue; 1013 } 1014 if (cse->txform) { 1015 if (cnop[req].len == 0 || 1016 (cnop[req].len % cse->txform->blocksize) != 0) { 1017 cnop[req].status = EINVAL; 1018 continue; 1019 } 1020 } 1021 1022 crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); 1023 if (crp == NULL) { 1024 cnop[req].status = ENOMEM; 1025 goto bail; 1026 } 1027 1028 bzero(&crp->uio, sizeof(crp->uio)); 1029 crp->uio.uio_iovcnt = 1; 1030 crp->uio.uio_resid = 0; 1031 crp->uio.uio_rw = UIO_WRITE; 1032 crp->uio.uio_iov = crp->iovec; 1033 UIO_SETUP_SYSSPACE(&crp->uio); 1034 memset(&crp->iovec, 0, sizeof(crp->iovec)); 1035 crp->uio.uio_iov[0].iov_len = cnop[req].len; 1036 crp->uio.uio_iov[0].iov_base = kmem_alloc(cnop[req].len, 1037 KM_SLEEP); 1038 crp->uio.uio_resid = crp->uio.uio_iov[0].iov_len; 1039 1040 if (cse->thash) { 1041 crda = crp->crp_desc; 1042 if (cse->txform) 1043 crde = crda->crd_next; 1044 } else { 1045 if (cse->txform) 1046 crde = crp->crp_desc; 1047 else { 1048 cnop[req].status = EINVAL; 1049 goto bail; 1050 } 1051 } 1052 1053 if ((copyin(cnop[req].src, 1054 crp->uio.uio_iov[0].iov_base, cnop[req].len))) { 1055 cnop[req].status = EINVAL; 1056 goto bail; 1057 } 1058 1059 if (crda) { 1060 crda->crd_skip = 0; 1061 crda->crd_len = cnop[req].len; 1062 crda->crd_inject = 0; /* ??? */ 1063 1064 crda->crd_alg = cse->mac; 1065 crda->crd_key = cse->mackey; 1066 crda->crd_klen = cse->mackeylen * 8; 1067 } 1068 1069 if (crde) { 1070 if (cnop[req].op == COP_ENCRYPT) 1071 crde->crd_flags |= CRD_F_ENCRYPT; 1072 else 1073 crde->crd_flags &= ~CRD_F_ENCRYPT; 1074 crde->crd_len = cnop[req].len; 1075 crde->crd_inject = 0; 1076 1077 crde->crd_alg = cse->cipher; 1078 #ifdef notyet /* XXX must notify h/w driver new key, drain */ 1079 if(cnop[req].key && cnop[req].keylen) { 1080 crde->crd_key = malloc(cnop[req].keylen, 1081 M_XDATA, M_WAITOK); 1082 if((error = copyin(cnop[req].key, 1083 crde->crd_key, cnop[req].keylen))) { 1084 cnop[req].status = EINVAL; 1085 goto bail; 1086 } 1087 crde->crd_klen = cnop[req].keylen * 8; 1088 } else { ... } 1089 #endif 1090 crde->crd_key = cse->key; 1091 crde->crd_klen = cse->keylen * 8; 1092 } 1093 1094 crp->crp_ilen = cnop[req].len; 1095 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM 1096 | (cnop[req].flags & COP_F_BATCH); 1097 crp->crp_buf = (void *)&crp->uio; 1098 crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_mcb; 1099 crp->crp_sid = cse->sid; 1100 crp->crp_opaque = (void *)cse; 1101 crp->fcrp = fcr; 1102 crp->dst = cnop[req].dst; 1103 /* we can use the crp_ilen in cryptop(crp) for this */ 1104 crp->len = cnop[req].len; 1105 crp->mac = cnop[req].mac; 1106 1107 if (cnop[req].iv) { 1108 if (crde == NULL) { 1109 cnop[req].status = EINVAL; 1110 goto bail; 1111 } 1112 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 1113 cnop[req].status = EINVAL; 1114 goto bail; 1115 } 1116 if ((error = copyin(cnop[req].iv, crp->tmp_iv, 1117 cse->txform->blocksize))) { 1118 cnop[req].status = EINVAL; 1119 goto bail; 1120 } 1121 bcopy(crp->tmp_iv, crde->crd_iv, cse->txform->blocksize); 1122 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; 1123 crde->crd_skip = 0; 1124 } else if (crde) { 1125 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ 1126 crde->crd_skip = 0; 1127 } else { 1128 crde->crd_flags |= CRD_F_IV_PRESENT; 1129 crde->crd_skip = cse->txform->blocksize; 1130 crde->crd_len -= cse->txform->blocksize; 1131 } 1132 } 1133 1134 if (cnop[req].mac) { 1135 if (crda == NULL) { 1136 cnop[req].status = EINVAL; 1137 goto bail; 1138 } 1139 crp->crp_mac=cse->tmp_mac; 1140 } 1141 cnop[req].reqid = atomic_inc_32_nv(&(fcr->requestid)); 1142 crp->crp_reqid = cnop[req].reqid; 1143 crp->crp_usropaque = cnop[req].opaque; 1144 #ifdef notyet 1145 eagain: 1146 #endif 1147 cnop[req].status = crypto_dispatch(crp); 1148 mutex_spin_enter(&crypto_mtx); /* XXX why mutex? */ 1149 1150 switch (cnop[req].status) { 1151 #ifdef notyet /* don't loop forever -- but EAGAIN not possible here yet */ 1152 case EAGAIN: 1153 mutex_spin_exit(&crypto_mtx); 1154 goto eagain; 1155 break; 1156 #endif 1157 case 0: 1158 break; 1159 default: 1160 DPRINTF(("cryptodev_op: not waiting, error.\n")); 1161 mutex_spin_exit(&crypto_mtx); 1162 goto bail; 1163 } 1164 1165 mutex_spin_exit(&crypto_mtx); 1166 bail: 1167 if (cnop[req].status) { 1168 if (crp) { 1169 crypto_freereq(crp); 1170 if(cse->uio.uio_iov[0].iov_base) { 1171 kmem_free(cse->uio.uio_iov[0].iov_base, 1172 cse->uio.uio_iov[0].iov_len); 1173 } 1174 } 1175 error = 0; 1176 } 1177 } 1178 return (error); 1179 } 1180 1181 static int 1182 cryptodev_mkey(struct fcrypt *fcr, struct crypt_n_kop *kop, int count) 1183 { 1184 struct cryptkop *krp = NULL; 1185 int error = EINVAL; 1186 int in, out, size, i, req; 1187 1188 for (req = 0; req < count; req++) { 1189 if (kop[req].crk_iparams + kop[req].crk_oparams > CRK_MAXPARAM) { 1190 return (EFBIG); 1191 } 1192 1193 in = kop[req].crk_iparams; 1194 out = kop[req].crk_oparams; 1195 switch (kop[req].crk_op) { 1196 case CRK_MOD_EXP: 1197 if (in == 3 && out == 1) 1198 break; 1199 kop[req].crk_status = EINVAL; 1200 continue; 1201 case CRK_MOD_EXP_CRT: 1202 if (in == 6 && out == 1) 1203 break; 1204 kop[req].crk_status = EINVAL; 1205 continue; 1206 case CRK_DSA_SIGN: 1207 if (in == 5 && out == 2) 1208 break; 1209 kop[req].crk_status = EINVAL; 1210 continue; 1211 case CRK_DSA_VERIFY: 1212 if (in == 7 && out == 0) 1213 break; 1214 kop[req].crk_status = EINVAL; 1215 continue; 1216 case CRK_DH_COMPUTE_KEY: 1217 if (in == 3 && out == 1) 1218 break; 1219 kop[req].crk_status = EINVAL; 1220 continue; 1221 case CRK_MOD_ADD: 1222 if (in == 3 && out == 1) 1223 break; 1224 kop[req].crk_status = EINVAL; 1225 continue; 1226 case CRK_MOD_ADDINV: 1227 if (in == 2 && out == 1) 1228 break; 1229 kop[req].crk_status = EINVAL; 1230 continue; 1231 case CRK_MOD_SUB: 1232 if (in == 3 && out == 1) 1233 break; 1234 kop[req].crk_status = EINVAL; 1235 continue; 1236 case CRK_MOD_MULT: 1237 if (in == 3 && out == 1) 1238 break; 1239 kop[req].crk_status = EINVAL; 1240 continue; 1241 case CRK_MOD_MULTINV: 1242 if (in == 2 && out == 1) 1243 break; 1244 kop[req].crk_status = EINVAL; 1245 continue; 1246 case CRK_MOD: 1247 if (in == 2 && out == 1) 1248 break; 1249 kop[req].crk_status = EINVAL; 1250 continue; 1251 default: 1252 kop[req].crk_status = EINVAL; 1253 continue; 1254 } 1255 1256 krp = pool_get(&cryptkop_pool, PR_WAITOK); 1257 if (!krp) { 1258 kop[req].crk_status = ENOMEM; 1259 goto fail; 1260 } 1261 bzero(krp, sizeof *krp); 1262 cv_init(&krp->krp_cv, "crykdev"); 1263 krp->krp_op = kop[req].crk_op; 1264 krp->krp_status = kop[req].crk_status; 1265 krp->krp_iparams = kop[req].crk_iparams; 1266 krp->krp_oparams = kop[req].crk_oparams; 1267 krp->krp_status = 0; 1268 krp->krp_callback = 1269 (int (*) (struct cryptkop *)) cryptodevkey_mcb; 1270 bcopy(kop[req].crk_param, 1271 krp->crk_param, 1272 sizeof(kop[req].crk_param)); 1273 1274 krp->krp_flags = CRYPTO_F_CBIMM; 1275 1276 for (i = 0; i < CRK_MAXPARAM; i++) 1277 krp->krp_param[i].crp_nbits = 1278 kop[req].crk_param[i].crp_nbits; 1279 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 1280 size = (krp->krp_param[i].crp_nbits + 7) / 8; 1281 if (size == 0) 1282 continue; 1283 krp->krp_param[i].crp_p = 1284 kmem_alloc(size, KM_SLEEP); 1285 if (i >= krp->krp_iparams) 1286 continue; 1287 kop[req].crk_status = copyin(kop[req].crk_param[i].crp_p, 1288 krp->krp_param[i].crp_p, size); 1289 if (kop[req].crk_status) 1290 goto fail; 1291 } 1292 krp->fcrp = fcr; 1293 1294 kop[req].crk_reqid = atomic_inc_32_nv(&(fcr->requestid)); 1295 krp->krp_reqid = kop[req].crk_reqid; 1296 krp->krp_usropaque = kop[req].crk_opaque; 1297 1298 kop[req].crk_status = crypto_kdispatch(krp); 1299 if (kop[req].crk_status != 0) { 1300 goto fail; 1301 } 1302 1303 fail: 1304 if(kop[req].crk_status) { 1305 if (krp) { 1306 kop[req].crk_status = krp->krp_status; 1307 for (i = 0; i < CRK_MAXPARAM; i++) { 1308 struct crparam *kp = 1309 &(krp->krp_param[i]); 1310 if (kp->crp_p) { 1311 size = (kp->crp_nbits + 7) / 8; 1312 KASSERT(size > 0); 1313 memset(kp->crp_p, 0, size); 1314 kmem_free(kp->crp_p, size); 1315 } 1316 } 1317 pool_put(&cryptkop_pool, krp); 1318 } 1319 } 1320 error = 0; 1321 } 1322 DPRINTF(("cryptodev_key: error=0x%08x\n", error)); 1323 return (error); 1324 } 1325 1326 static int 1327 cryptodev_session(struct fcrypt *fcr, struct session_op *sop) { 1328 struct cryptoini cria, crie; 1329 struct enc_xform *txform = NULL; 1330 struct auth_hash *thash = NULL; 1331 struct csession *cse; 1332 u_int64_t sid; 1333 int error = 0; 1334 1335 /* XXX there must be a way to not embed the list of xforms here */ 1336 switch (sop->cipher) { 1337 case 0: 1338 break; 1339 case CRYPTO_DES_CBC: 1340 txform = &enc_xform_des; 1341 break; 1342 case CRYPTO_3DES_CBC: 1343 txform = &enc_xform_3des; 1344 break; 1345 case CRYPTO_BLF_CBC: 1346 txform = &enc_xform_blf; 1347 break; 1348 case CRYPTO_CAST_CBC: 1349 txform = &enc_xform_cast5; 1350 case CRYPTO_SKIPJACK_CBC: 1351 txform = &enc_xform_skipjack; 1352 break; 1353 case CRYPTO_AES_CBC: 1354 txform = &enc_xform_rijndael128; 1355 break; 1356 case CRYPTO_NULL_CBC: 1357 txform = &enc_xform_null; 1358 break; 1359 case CRYPTO_ARC4: 1360 txform = &enc_xform_arc4; 1361 break; 1362 default: 1363 DPRINTF(("Invalid cipher %d\n", sop->cipher)); 1364 return EINVAL; 1365 } 1366 1367 switch (sop->mac) { 1368 case 0: 1369 break; 1370 case CRYPTO_MD5_HMAC: 1371 thash = &auth_hash_hmac_md5; 1372 break; 1373 case CRYPTO_SHA1_HMAC: 1374 thash = &auth_hash_hmac_sha1; 1375 break; 1376 case CRYPTO_MD5_HMAC_96: 1377 thash = &auth_hash_hmac_md5_96; 1378 break; 1379 case CRYPTO_SHA1_HMAC_96: 1380 thash = &auth_hash_hmac_sha1_96; 1381 break; 1382 case CRYPTO_SHA2_HMAC: 1383 /* XXX switching on key length seems questionable */ 1384 if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) { 1385 thash = &auth_hash_hmac_sha2_256; 1386 } else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) { 1387 thash = &auth_hash_hmac_sha2_384; 1388 } else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) { 1389 thash = &auth_hash_hmac_sha2_512; 1390 } else { 1391 DPRINTF(("Invalid mackeylen %d\n", sop->mackeylen)); 1392 return EINVAL; 1393 } 1394 break; 1395 case CRYPTO_RIPEMD160_HMAC: 1396 thash = &auth_hash_hmac_ripemd_160; 1397 break; 1398 case CRYPTO_RIPEMD160_HMAC_96: 1399 thash = &auth_hash_hmac_ripemd_160_96; 1400 break; 1401 case CRYPTO_MD5: 1402 thash = &auth_hash_md5; 1403 break; 1404 case CRYPTO_SHA1: 1405 thash = &auth_hash_sha1; 1406 break; 1407 case CRYPTO_NULL_HMAC: 1408 thash = &auth_hash_null; 1409 break; 1410 default: 1411 DPRINTF(("Invalid mac %d\n", sop->mac)); 1412 return (EINVAL); 1413 } 1414 1415 memset(&crie, 0, sizeof(crie)); 1416 memset(&cria, 0, sizeof(cria)); 1417 1418 if (txform) { 1419 crie.cri_alg = txform->type; 1420 crie.cri_klen = sop->keylen * 8; 1421 if (sop->keylen > txform->maxkey || 1422 sop->keylen < txform->minkey) { 1423 DPRINTF(("keylen %d not in [%d,%d]\n", 1424 sop->keylen, txform->minkey, 1425 txform->maxkey)); 1426 error = EINVAL ; 1427 goto bail; 1428 } 1429 1430 crie.cri_key = malloc(crie.cri_klen / 8, M_XDATA, M_WAITOK); 1431 if ((error = copyin(sop->key, crie.cri_key, 1432 crie.cri_klen / 8))) { 1433 goto bail; 1434 } 1435 if (thash) { 1436 crie.cri_next = &cria; /* XXX forces enc then hash? */ 1437 } 1438 } 1439 1440 if (thash) { 1441 cria.cri_alg = thash->type; 1442 cria.cri_klen = sop->mackeylen * 8; 1443 if (sop->mackeylen != thash->keysize) { 1444 DPRINTF(("mackeylen %d != keysize %d\n", 1445 sop->mackeylen, thash->keysize)); 1446 error = EINVAL; 1447 goto bail; 1448 } 1449 if (cria.cri_klen) { 1450 cria.cri_key = malloc(cria.cri_klen / 8, M_XDATA, 1451 M_WAITOK); 1452 if ((error = copyin(sop->mackey, cria.cri_key, 1453 cria.cri_klen / 8))) { 1454 goto bail; 1455 } 1456 } 1457 } 1458 /* crypto_newsession requires that we hold the mutex. */ 1459 mutex_spin_enter(&crypto_mtx); 1460 error = crypto_newsession(&sid, (txform ? &crie : &cria), 1461 crypto_devallowsoft); 1462 if (!error) { 1463 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, 1464 cria.cri_key, cria.cri_klen, sop->cipher, 1465 sop->mac, txform, thash); 1466 if (cse != NULL) { 1467 sop->ses = cse->ses; 1468 } else { 1469 DPRINTF(("csecreate failed\n")); 1470 crypto_freesession(sid); 1471 error = EINVAL; 1472 } 1473 } else { 1474 DPRINTF(("SIOCSESSION violates kernel parameters %d\n", 1475 error)); 1476 } 1477 mutex_spin_exit(&crypto_mtx); 1478 bail: 1479 if (error) { 1480 if (crie.cri_key) { 1481 memset(crie.cri_key, 0, crie.cri_klen / 8); 1482 free(crie.cri_key, M_XDATA); 1483 } 1484 if (cria.cri_key) { 1485 memset(cria.cri_key, 0, cria.cri_klen / 8); 1486 free(cria.cri_key, M_XDATA); 1487 } 1488 } 1489 return error; 1490 } 1491 1492 static int 1493 cryptodev_msession(struct fcrypt *fcr, struct session_n_op *sn_ops, 1494 int count) 1495 { 1496 int i; 1497 1498 for (i = 0; i < count; i++, sn_ops++) { 1499 struct session_op s_op; 1500 s_op.cipher = sn_ops->cipher; 1501 s_op.mac = sn_ops->mac; 1502 s_op.keylen = sn_ops->keylen; 1503 s_op.key = sn_ops->key; 1504 s_op.mackeylen = sn_ops->mackeylen; 1505 s_op.mackey = sn_ops->mackey; 1506 1507 sn_ops->status = cryptodev_session(fcr, &s_op); 1508 sn_ops->ses = s_op.ses; 1509 } 1510 1511 return 0; 1512 } 1513 1514 static int 1515 cryptodev_msessionfin(struct fcrypt *fcr, int count, u_int32_t *sesid) 1516 { 1517 struct csession *cse; 1518 int req, error = 0; 1519 1520 mutex_spin_enter(&crypto_mtx); 1521 for(req = 0; req < count; req++) { 1522 cse = csefind(fcr, sesid[req]); 1523 if (cse == NULL) 1524 continue; 1525 csedelete(fcr, cse); 1526 error = csefree(cse); 1527 } 1528 mutex_spin_exit(&crypto_mtx); 1529 return 0; 1530 } 1531 1532 /* 1533 * collect as many completed requests as are availble, or count completed requests 1534 * whichever is less. 1535 * return the number of requests. 1536 */ 1537 static int 1538 cryptodev_getmstatus(struct fcrypt *fcr, struct crypt_result *crypt_res, 1539 int count) 1540 { 1541 struct cryptop *crp = NULL; 1542 struct cryptkop *krp = NULL; 1543 struct csession *cse; 1544 int i, size, req = 0; 1545 int completed=0; 1546 1547 /* On stack so nobody else can grab them -- no locking */ 1548 SLIST_HEAD(, cryptop) crp_delfree_l = 1549 SLIST_HEAD_INITIALIZER(crp_delfree_l); 1550 SLIST_HEAD(, cryptkop) krp_delfree_l = 1551 SLIST_HEAD_INITIALIZER(krp_delfree_l); 1552 1553 mutex_spin_enter(&crypto_mtx); 1554 1555 /* at this point we do not know which response user is requesting for 1556 * (symmetric or asymmetric) so we copyout one from each i.e if the 1557 * count is 2 then 1 from symmetric and 1 from asymmetric queue and 1558 * if 3 then 2 symmetric and 1 asymmetric and so on */ 1559 for(; req < count ;) { 1560 crp = TAILQ_FIRST(&fcr->crp_ret_mq); 1561 if(crp) { 1562 cse = (struct csession *)crp->crp_opaque; 1563 crypt_res[req].reqid = crp->crp_reqid; 1564 crypt_res[req].opaque = crp->crp_usropaque; 1565 completed++; 1566 cse = csefind(fcr, cse->ses); 1567 if (cse == NULL) { 1568 DPRINTF(("csefind failed\n")); 1569 crypt_res[req].status = EINVAL; 1570 goto bail; 1571 } 1572 1573 if (crp->crp_etype != 0) { 1574 crypt_res[req].status = crp->crp_etype; 1575 goto bail; 1576 } 1577 1578 if (cse->error) { 1579 crypt_res[req].status = cse->error; 1580 goto bail; 1581 } 1582 1583 if (crp->dst && 1584 (crypt_res[req].status = copyout 1585 (crp->uio.uio_iov[0].iov_base, 1586 crp->dst, crp->len))) 1587 goto bail; 1588 1589 if (crp->mac && 1590 (crypt_res[req].status = copyout 1591 (crp->crp_mac, crp->mac, 1592 cse->thash->authsize))) 1593 goto bail; 1594 bail: 1595 TAILQ_REMOVE(&fcr->crp_ret_mq, crp, crp_next); 1596 SLIST_INSERT_HEAD(&crp_delfree_l, crp, 1597 crp_qun.crp_lnext); 1598 req++; 1599 } 1600 1601 if(req < count) { 1602 krp = TAILQ_FIRST(&fcr->crp_ret_mkq); 1603 if (krp) { 1604 crypt_res[req].reqid = krp->krp_reqid; 1605 crypt_res[req].opaque = krp->krp_usropaque; 1606 completed++; 1607 if (krp->krp_status != 0) { 1608 DPRINTF(("cryptodev_key: " 1609 "krp->krp_status" 1610 "0x%08x\n", krp->krp_status)); 1611 crypt_res[req].status = 1612 krp->krp_status; 1613 goto fail; 1614 } 1615 1616 for (i = krp->krp_iparams; i < krp->krp_iparams 1617 + krp->krp_oparams; i++) { 1618 size = (krp->krp_param[i].crp_nbits 1619 + 7) / 8; 1620 if (size == 0) 1621 continue; 1622 crypt_res[req].status = copyout 1623 (krp->krp_param[i].crp_p, 1624 krp->crk_param[i].crp_p, size); 1625 if (crypt_res[req].status) { 1626 DPRINTF(("cryptodev_key: " 1627 "copyout oparam " 1628 "%d failed, " 1629 "error=%d\n", 1630 i-krp->krp_iparams, 1631 crypt_res[req].status)); 1632 goto fail; 1633 } 1634 } 1635 fail: 1636 TAILQ_REMOVE(&fcr->crp_ret_mkq, krp, krp_next); 1637 /* not sure what to do for this */ 1638 /* kop[req].crk_status = krp->krp_status; */ 1639 SLIST_INSERT_HEAD(&krp_delfree_l, krp, 1640 krp_qun.krp_lnext); 1641 } 1642 req++; 1643 } 1644 } 1645 mutex_spin_exit(&crypto_mtx); 1646 1647 while(!SLIST_EMPTY(&crp_delfree_l)) { 1648 crp = SLIST_FIRST(&crp_delfree_l); 1649 SLIST_REMOVE_HEAD(&crp_delfree_l, crp_qun.crp_lnext); 1650 kmem_free(crp->uio.uio_iov[0].iov_base, 1651 crp->uio.uio_iov[0].iov_len); 1652 crypto_freereq(crp); 1653 } 1654 1655 while(!SLIST_EMPTY(&krp_delfree_l)) { 1656 krp = SLIST_FIRST(&krp_delfree_l); 1657 for (i = 0; i < CRK_MAXPARAM; i++) { 1658 struct crparam *kp = &(krp->krp_param[i]); 1659 if (kp->crp_p) { 1660 size = (kp->crp_nbits + 7) / 8; 1661 KASSERT(size > 0); 1662 memset(kp->crp_p, 0, size); 1663 kmem_free(kp->crp_p, size); 1664 } 1665 } 1666 SLIST_REMOVE_HEAD(&krp_delfree_l, krp_qun.krp_lnext); 1667 pool_put(&cryptkop_pool, krp); 1668 } 1669 return completed; 1670 } 1671 1672 static int 1673 cryptodev_getstatus (struct fcrypt *fcr, struct crypt_result *crypt_res) 1674 { 1675 struct cryptop *crp = NULL; 1676 struct cryptkop *krp = NULL; 1677 struct csession *cse; 1678 int i, size, req = 0; 1679 1680 mutex_spin_enter(&crypto_mtx); 1681 /* Here we dont know for which request the user is requesting the 1682 * response so checking in both the queues */ 1683 TAILQ_FOREACH(crp, &fcr->crp_ret_mq, crp_next) { 1684 if(crp && (crp->crp_reqid == crypt_res->reqid)) { 1685 cse = (struct csession *)crp->crp_opaque; 1686 crypt_res->opaque = crp->crp_usropaque; 1687 cse = csefind(fcr, cse->ses); 1688 if (cse == NULL) { 1689 DPRINTF(("csefind failed\n")); 1690 crypt_res->status = EINVAL; 1691 goto bail; 1692 } 1693 1694 if (crp->crp_etype != 0) { 1695 crypt_res->status = crp->crp_etype; 1696 goto bail; 1697 } 1698 1699 if (cse->error) { 1700 crypt_res->status = cse->error; 1701 goto bail; 1702 } 1703 1704 if (crp->dst && 1705 (crypt_res->status = copyout 1706 (crp->uio.uio_iov[0].iov_base, 1707 crp->dst, crp->len))) 1708 goto bail; 1709 1710 if (crp->mac && 1711 (crypt_res->status = copyout(crp->crp_mac, 1712 crp->mac, cse->thash->authsize))) 1713 goto bail; 1714 bail: 1715 TAILQ_REMOVE(&fcr->crp_ret_mq, crp, crp_next); 1716 1717 mutex_spin_exit(&crypto_mtx); 1718 crypto_freereq(crp); 1719 return 0; 1720 } 1721 } 1722 1723 TAILQ_FOREACH(krp, &fcr->crp_ret_mkq, krp_next) { 1724 if(krp && (krp->krp_reqid == crypt_res->reqid)) { 1725 crypt_res[req].opaque = krp->krp_usropaque; 1726 if (krp->krp_status != 0) { 1727 DPRINTF(("cryptodev_key: " 1728 "krp->krp_status 0x%08x\n", 1729 krp->krp_status)); 1730 crypt_res[req].status = krp->krp_status; 1731 goto fail; 1732 } 1733 1734 for (i = krp->krp_iparams; i < krp->krp_iparams 1735 + krp->krp_oparams; i++) { 1736 size = (krp->krp_param[i].crp_nbits + 7) / 8; 1737 if (size == 0) 1738 continue; 1739 crypt_res[req].status = copyout 1740 (krp->krp_param[i].crp_p, 1741 krp->crk_param[i].crp_p, size); 1742 if (crypt_res[req].status) { 1743 DPRINTF(("cryptodev_key: copyout oparam" 1744 "%d failed, error=%d\n", 1745 i-krp->krp_iparams, 1746 crypt_result[req].status)); 1747 goto fail; 1748 } 1749 } 1750 fail: 1751 TAILQ_REMOVE(&fcr->crp_ret_mkq, krp, krp_next); 1752 mutex_spin_exit(&crypto_mtx); 1753 /* not sure what to do for this */ 1754 /* kop[req].crk_status = krp->krp_status; */ 1755 for (i = 0; i < CRK_MAXPARAM; i++) { 1756 struct crparam *kp = &(krp->krp_param[i]); 1757 if (kp->crp_p) { 1758 size = (kp->crp_nbits + 7) / 8; 1759 KASSERT(size > 0); 1760 memset(kp->crp_p, 0, size); 1761 kmem_free(kp->crp_p, size); 1762 } 1763 } 1764 pool_put(&cryptkop_pool, krp); 1765 return 0; 1766 } 1767 } 1768 mutex_spin_exit(&crypto_mtx); 1769 return EINPROGRESS; 1770 } 1771 1772 static int 1773 cryptof_poll(struct file *fp, int events) 1774 { 1775 struct fcrypt *fcr = (struct fcrypt *)fp->f_data; 1776 int revents = 0; 1777 1778 if (!(events & (POLLIN | POLLRDNORM))) { 1779 /* only support read and POLLIN */ 1780 return 0; 1781 } 1782 1783 mutex_spin_enter(&crypto_mtx); 1784 if (TAILQ_EMPTY(&fcr->crp_ret_mq) && TAILQ_EMPTY(&fcr->crp_ret_mkq)) { 1785 /* no completed requests pending, save the poll for later */ 1786 selrecord(curlwp, &fcr->sinfo); 1787 } else { 1788 /* let the app(s) know that there are completed requests */ 1789 revents = events & (POLLIN | POLLRDNORM); 1790 } 1791 mutex_spin_exit(&crypto_mtx); 1792 1793 return revents; 1794 } 1795 1796 /* 1797 * Pseudo-device initialization routine for /dev/crypto 1798 */ 1799 void cryptoattach(int); 1800 1801 void 1802 cryptoattach(int num) 1803 { 1804 pool_init(&fcrpl, sizeof(struct fcrypt), 0, 0, 0, "fcrpl", 1805 NULL, IPL_NET); /* XXX IPL_NET ("splcrypto") */ 1806 pool_init(&csepl, sizeof(struct csession), 0, 0, 0, "csepl", 1807 NULL, IPL_NET); /* XXX IPL_NET ("splcrypto") */ 1808 1809 /* 1810 * Preallocate space for 64 users, with 5 sessions each. 1811 * (consider that a TLS protocol session requires at least 1812 * 3DES, MD5, and SHA1 (both hashes are used in the PRF) for 1813 * the negotiation, plus HMAC_SHA1 for the actual SSL records, 1814 * consuming one session here for each algorithm. 1815 */ 1816 pool_prime(&fcrpl, 64); 1817 pool_prime(&csepl, 64 * 5); 1818 } 1819
Indexes created Tue Sep 23 22:09:46 GMT 2025