1 /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 Theo de Raadt 5 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting 6 * Copyright (c) 2014 The FreeBSD Foundation 7 * All rights reserved. 8 * 9 * Portions of this software were developed by John-Mark Gurney 10 * under sponsorship of the FreeBSD Foundation and 11 * Rubicon Communications, LLC (Netgate). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 * 36 * Effort sponsored in part by the Defense Advanced Research Projects 37 * Agency (DARPA) and Air Force Research Laboratory, Air Force 38 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 39 */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/malloc.h> 47 #include <sys/mbuf.h> 48 #include <sys/lock.h> 49 #include <sys/mutex.h> 50 #include <sys/sysctl.h> 51 #include <sys/file.h> 52 #include <sys/filedesc.h> 53 #include <sys/errno.h> 54 #include <sys/random.h> 55 #include <sys/conf.h> 56 #include <sys/kernel.h> 57 #include <sys/module.h> 58 #include <sys/fcntl.h> 59 #include <sys/bus.h> 60 #include <sys/user.h> 61 #include <sys/sdt.h> 62 63 #include <opencrypto/cryptodev.h> 64 #include <opencrypto/xform.h> 65 66 SDT_PROVIDER_DECLARE(opencrypto); 67 68 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/); 69 70 #ifdef COMPAT_FREEBSD32 71 #include <sys/mount.h> 72 #include <compat/freebsd32/freebsd32.h> 73 74 struct session_op32 { 75 u_int32_t cipher; 76 u_int32_t mac; 77 u_int32_t keylen; 78 u_int32_t key; 79 int mackeylen; 80 u_int32_t mackey; 81 u_int32_t ses; 82 }; 83 84 struct session2_op32 { 85 u_int32_t cipher; 86 u_int32_t mac; 87 u_int32_t keylen; 88 u_int32_t key; 89 int mackeylen; 90 u_int32_t mackey; 91 u_int32_t ses; 92 int crid; 93 int pad[4]; 94 }; 95 96 struct crypt_op32 { 97 u_int32_t ses; 98 u_int16_t op; 99 u_int16_t flags; 100 u_int len; 101 u_int32_t src, dst; 102 u_int32_t mac; 103 u_int32_t iv; 104 }; 105 106 struct crparam32 { 107 u_int32_t crp_p; 108 u_int crp_nbits; 109 }; 110 111 struct crypt_kop32 { 112 u_int crk_op; 113 u_int crk_status; 114 u_short crk_iparams; 115 u_short crk_oparams; 116 u_int crk_crid; 117 struct crparam32 crk_param[CRK_MAXPARAM]; 118 }; 119 120 struct cryptotstat32 { 121 struct timespec32 acc; 122 struct timespec32 min; 123 struct timespec32 max; 124 u_int32_t count; 125 }; 126 127 struct cryptostats32 { 128 u_int32_t cs_ops; 129 u_int32_t cs_errs; 130 u_int32_t cs_kops; 131 u_int32_t cs_kerrs; 132 u_int32_t cs_intrs; 133 u_int32_t cs_rets; 134 u_int32_t cs_blocks; 135 u_int32_t cs_kblocks; 136 struct cryptotstat32 cs_invoke; 137 struct cryptotstat32 cs_done; 138 struct cryptotstat32 cs_cb; 139 struct cryptotstat32 cs_finis; 140 }; 141 142 #define CIOCGSESSION32 _IOWR('c', 101, struct session_op32) 143 #define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32) 144 #define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32) 145 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32) 146 #define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32) 147 148 static void 149 session_op_from_32(const struct session_op32 *from, struct session_op *to) 150 { 151 152 CP(*from, *to, cipher); 153 CP(*from, *to, mac); 154 CP(*from, *to, keylen); 155 PTRIN_CP(*from, *to, key); 156 CP(*from, *to, mackeylen); 157 PTRIN_CP(*from, *to, mackey); 158 CP(*from, *to, ses); 159 } 160 161 static void 162 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to) 163 { 164 165 session_op_from_32((const struct session_op32 *)from, 166 (struct session_op *)to); 167 CP(*from, *to, crid); 168 } 169 170 static void 171 session_op_to_32(const struct session_op *from, struct session_op32 *to) 172 { 173 174 CP(*from, *to, cipher); 175 CP(*from, *to, mac); 176 CP(*from, *to, keylen); 177 PTROUT_CP(*from, *to, key); 178 CP(*from, *to, mackeylen); 179 PTROUT_CP(*from, *to, mackey); 180 CP(*from, *to, ses); 181 } 182 183 static void 184 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to) 185 { 186 187 session_op_to_32((const struct session_op *)from, 188 (struct session_op32 *)to); 189 CP(*from, *to, crid); 190 } 191 192 static void 193 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to) 194 { 195 196 CP(*from, *to, ses); 197 CP(*from, *to, op); 198 CP(*from, *to, flags); 199 CP(*from, *to, len); 200 PTRIN_CP(*from, *to, src); 201 PTRIN_CP(*from, *to, dst); 202 PTRIN_CP(*from, *to, mac); 203 PTRIN_CP(*from, *to, iv); 204 } 205 206 static void 207 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to) 208 { 209 210 CP(*from, *to, ses); 211 CP(*from, *to, op); 212 CP(*from, *to, flags); 213 CP(*from, *to, len); 214 PTROUT_CP(*from, *to, src); 215 PTROUT_CP(*from, *to, dst); 216 PTROUT_CP(*from, *to, mac); 217 PTROUT_CP(*from, *to, iv); 218 } 219 220 static void 221 crparam_from_32(const struct crparam32 *from, struct crparam *to) 222 { 223 224 PTRIN_CP(*from, *to, crp_p); 225 CP(*from, *to, crp_nbits); 226 } 227 228 static void 229 crparam_to_32(const struct crparam *from, struct crparam32 *to) 230 { 231 232 PTROUT_CP(*from, *to, crp_p); 233 CP(*from, *to, crp_nbits); 234 } 235 236 static void 237 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to) 238 { 239 int i; 240 241 CP(*from, *to, crk_op); 242 CP(*from, *to, crk_status); 243 CP(*from, *to, crk_iparams); 244 CP(*from, *to, crk_oparams); 245 CP(*from, *to, crk_crid); 246 for (i = 0; i < CRK_MAXPARAM; i++) 247 crparam_from_32(&from->crk_param[i], &to->crk_param[i]); 248 } 249 250 static void 251 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to) 252 { 253 int i; 254 255 CP(*from, *to, crk_op); 256 CP(*from, *to, crk_status); 257 CP(*from, *to, crk_iparams); 258 CP(*from, *to, crk_oparams); 259 CP(*from, *to, crk_crid); 260 for (i = 0; i < CRK_MAXPARAM; i++) 261 crparam_to_32(&from->crk_param[i], &to->crk_param[i]); 262 } 263 #endif 264 265 struct csession { 266 TAILQ_ENTRY(csession) next; 267 crypto_session_t cses; 268 volatile u_int refs; 269 u_int32_t ses; 270 struct mtx lock; /* for op submission */ 271 272 struct enc_xform *txform; 273 int hashsize; 274 int ivsize; 275 int mode; 276 277 void *key; 278 void *mackey; 279 }; 280 281 struct cryptop_data { 282 struct csession *cse; 283 284 char *buf; 285 bool done; 286 }; 287 288 struct fcrypt { 289 TAILQ_HEAD(csessionlist, csession) csessions; 290 int sesn; 291 struct mtx lock; 292 }; 293 294 static int cryptof_ioctl(struct file *, u_long, void *, 295 struct ucred *, struct thread *); 296 static int cryptof_stat(struct file *, struct stat *, 297 struct ucred *, struct thread *); 298 static int cryptof_close(struct file *, struct thread *); 299 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *, 300 struct filedesc *); 301 302 static struct fileops cryptofops = { 303 .fo_read = invfo_rdwr, 304 .fo_write = invfo_rdwr, 305 .fo_truncate = invfo_truncate, 306 .fo_ioctl = cryptof_ioctl, 307 .fo_poll = invfo_poll, 308 .fo_kqfilter = invfo_kqfilter, 309 .fo_stat = cryptof_stat, 310 .fo_close = cryptof_close, 311 .fo_chmod = invfo_chmod, 312 .fo_chown = invfo_chown, 313 .fo_sendfile = invfo_sendfile, 314 .fo_fill_kinfo = cryptof_fill_kinfo, 315 }; 316 317 static struct csession *csefind(struct fcrypt *, u_int); 318 static bool csedelete(struct fcrypt *, u_int); 319 static struct csession *csecreate(struct fcrypt *, crypto_session_t, 320 struct crypto_session_params *, struct enc_xform *, void *, 321 struct auth_hash *, void *); 322 static void csefree(struct csession *); 323 324 static int cryptodev_op(struct csession *, struct crypt_op *, 325 struct ucred *, struct thread *td); 326 static int cryptodev_aead(struct csession *, struct crypt_aead *, 327 struct ucred *, struct thread *); 328 static int cryptodev_key(struct crypt_kop *); 329 static int cryptodev_find(struct crypt_find_op *); 330 331 /* 332 * Check a crypto identifier to see if it requested 333 * a software device/driver. This can be done either 334 * by device name/class or through search constraints. 335 */ 336 static int 337 checkforsoftware(int *cridp) 338 { 339 int crid; 340 341 crid = *cridp; 342 343 if (!crypto_devallowsoft) { 344 if (crid & CRYPTOCAP_F_SOFTWARE) { 345 if (crid & CRYPTOCAP_F_HARDWARE) { 346 *cridp = CRYPTOCAP_F_HARDWARE; 347 return 0; 348 } 349 return EINVAL; 350 } 351 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 && 352 (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0) 353 return EINVAL; 354 } 355 return 0; 356 } 357 358 /* ARGSUSED */ 359 static int 360 cryptof_ioctl( 361 struct file *fp, 362 u_long cmd, 363 void *data, 364 struct ucred *active_cred, 365 struct thread *td) 366 { 367 #define SES2(p) ((struct session2_op *)p) 368 struct crypto_session_params csp; 369 struct fcrypt *fcr = fp->f_data; 370 struct csession *cse; 371 struct session_op *sop; 372 struct crypt_op *cop; 373 struct crypt_aead *caead; 374 struct enc_xform *txform = NULL; 375 struct auth_hash *thash = NULL; 376 void *key = NULL; 377 void *mackey = NULL; 378 struct crypt_kop *kop; 379 crypto_session_t cses; 380 u_int32_t ses; 381 int error = 0, crid; 382 #ifdef COMPAT_FREEBSD32 383 struct session2_op sopc; 384 struct crypt_op copc; 385 struct crypt_kop kopc; 386 #endif 387 388 switch (cmd) { 389 case CIOCGSESSION: 390 case CIOCGSESSION2: 391 #ifdef COMPAT_FREEBSD32 392 case CIOCGSESSION32: 393 case CIOCGSESSION232: 394 if (cmd == CIOCGSESSION32) { 395 session_op_from_32(data, (struct session_op *)&sopc); 396 sop = (struct session_op *)&sopc; 397 } else if (cmd == CIOCGSESSION232) { 398 session2_op_from_32(data, &sopc); 399 sop = (struct session_op *)&sopc; 400 } else 401 #endif 402 sop = (struct session_op *)data; 403 switch (sop->cipher) { 404 case 0: 405 break; 406 case CRYPTO_AES_CBC: 407 txform = &enc_xform_rijndael128; 408 break; 409 case CRYPTO_AES_XTS: 410 txform = &enc_xform_aes_xts; 411 break; 412 case CRYPTO_NULL_CBC: 413 txform = &enc_xform_null; 414 break; 415 case CRYPTO_CAMELLIA_CBC: 416 txform = &enc_xform_camellia; 417 break; 418 case CRYPTO_AES_ICM: 419 txform = &enc_xform_aes_icm; 420 break; 421 case CRYPTO_AES_NIST_GCM_16: 422 txform = &enc_xform_aes_nist_gcm; 423 break; 424 case CRYPTO_CHACHA20: 425 txform = &enc_xform_chacha20; 426 break; 427 case CRYPTO_AES_CCM_16: 428 txform = &enc_xform_ccm; 429 break; 430 431 default: 432 CRYPTDEB("invalid cipher"); 433 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 434 return (EINVAL); 435 } 436 437 switch (sop->mac) { 438 case 0: 439 break; 440 case CRYPTO_POLY1305: 441 thash = &auth_hash_poly1305; 442 break; 443 case CRYPTO_SHA1_HMAC: 444 thash = &auth_hash_hmac_sha1; 445 break; 446 case CRYPTO_SHA2_224_HMAC: 447 thash = &auth_hash_hmac_sha2_224; 448 break; 449 case CRYPTO_SHA2_256_HMAC: 450 thash = &auth_hash_hmac_sha2_256; 451 break; 452 case CRYPTO_SHA2_384_HMAC: 453 thash = &auth_hash_hmac_sha2_384; 454 break; 455 case CRYPTO_SHA2_512_HMAC: 456 thash = &auth_hash_hmac_sha2_512; 457 break; 458 case CRYPTO_RIPEMD160_HMAC: 459 thash = &auth_hash_hmac_ripemd_160; 460 break; 461 #ifdef COMPAT_FREEBSD12 462 case CRYPTO_AES_128_NIST_GMAC: 463 case CRYPTO_AES_192_NIST_GMAC: 464 case CRYPTO_AES_256_NIST_GMAC: 465 /* Should always be paired with GCM. */ 466 if (sop->cipher != CRYPTO_AES_NIST_GCM_16) { 467 CRYPTDEB("GMAC without GCM"); 468 return (EINVAL); 469 } 470 break; 471 #endif 472 case CRYPTO_AES_NIST_GMAC: 473 switch (sop->mackeylen * 8) { 474 case 128: 475 thash = &auth_hash_nist_gmac_aes_128; 476 break; 477 case 192: 478 thash = &auth_hash_nist_gmac_aes_192; 479 break; 480 case 256: 481 thash = &auth_hash_nist_gmac_aes_256; 482 break; 483 default: 484 CRYPTDEB("invalid GMAC key length"); 485 SDT_PROBE1(opencrypto, dev, ioctl, error, 486 __LINE__); 487 return (EINVAL); 488 } 489 break; 490 case CRYPTO_AES_CCM_CBC_MAC: 491 switch (sop->mackeylen) { 492 case 16: 493 thash = &auth_hash_ccm_cbc_mac_128; 494 break; 495 case 24: 496 thash = &auth_hash_ccm_cbc_mac_192; 497 break; 498 case 32: 499 thash = &auth_hash_ccm_cbc_mac_256; 500 break; 501 default: 502 CRYPTDEB("Invalid CBC MAC key size %d", 503 sop->keylen); 504 SDT_PROBE1(opencrypto, dev, ioctl, 505 error, __LINE__); 506 return (EINVAL); 507 } 508 break; 509 case CRYPTO_SHA1: 510 thash = &auth_hash_sha1; 511 break; 512 case CRYPTO_SHA2_224: 513 thash = &auth_hash_sha2_224; 514 break; 515 case CRYPTO_SHA2_256: 516 thash = &auth_hash_sha2_256; 517 break; 518 case CRYPTO_SHA2_384: 519 thash = &auth_hash_sha2_384; 520 break; 521 case CRYPTO_SHA2_512: 522 thash = &auth_hash_sha2_512; 523 break; 524 525 case CRYPTO_NULL_HMAC: 526 thash = &auth_hash_null; 527 break; 528 529 case CRYPTO_BLAKE2B: 530 thash = &auth_hash_blake2b; 531 break; 532 case CRYPTO_BLAKE2S: 533 thash = &auth_hash_blake2s; 534 break; 535 536 default: 537 CRYPTDEB("invalid mac"); 538 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 539 return (EINVAL); 540 } 541 542 if (txform == NULL && thash == NULL) 543 return (EINVAL); 544 545 memset(&csp, 0, sizeof(csp)); 546 547 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) { 548 switch (sop->mac) { 549 #ifdef COMPAT_FREEBSD12 550 case CRYPTO_AES_128_NIST_GMAC: 551 case CRYPTO_AES_192_NIST_GMAC: 552 case CRYPTO_AES_256_NIST_GMAC: 553 if (sop->keylen != sop->mackeylen) 554 return (EINVAL); 555 break; 556 #endif 557 case 0: 558 break; 559 default: 560 return (EINVAL); 561 } 562 csp.csp_mode = CSP_MODE_AEAD; 563 } else if (sop->cipher == CRYPTO_AES_CCM_16) { 564 switch (sop->mac) { 565 #ifdef COMPAT_FREEBSD12 566 case CRYPTO_AES_CCM_CBC_MAC: 567 if (sop->keylen != sop->mackeylen) 568 return (EINVAL); 569 thash = NULL; 570 break; 571 #endif 572 case 0: 573 break; 574 default: 575 return (EINVAL); 576 } 577 csp.csp_mode = CSP_MODE_AEAD; 578 } else if (txform && thash) 579 csp.csp_mode = CSP_MODE_ETA; 580 else if (txform) 581 csp.csp_mode = CSP_MODE_CIPHER; 582 else 583 csp.csp_mode = CSP_MODE_DIGEST; 584 585 if (txform) { 586 csp.csp_cipher_alg = txform->type; 587 csp.csp_cipher_klen = sop->keylen; 588 if (sop->keylen > txform->maxkey || 589 sop->keylen < txform->minkey) { 590 CRYPTDEB("invalid cipher parameters"); 591 error = EINVAL; 592 SDT_PROBE1(opencrypto, dev, ioctl, error, 593 __LINE__); 594 goto bail; 595 } 596 597 key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK); 598 error = copyin(sop->key, key, csp.csp_cipher_klen); 599 if (error) { 600 CRYPTDEB("invalid key"); 601 SDT_PROBE1(opencrypto, dev, ioctl, error, 602 __LINE__); 603 goto bail; 604 } 605 csp.csp_cipher_key = key; 606 csp.csp_ivlen = txform->ivsize; 607 } 608 609 if (thash) { 610 csp.csp_auth_alg = thash->type; 611 csp.csp_auth_klen = sop->mackeylen; 612 if (sop->mackeylen > thash->keysize || 613 sop->mackeylen < 0) { 614 CRYPTDEB("invalid mac key length"); 615 error = EINVAL; 616 SDT_PROBE1(opencrypto, dev, ioctl, error, 617 __LINE__); 618 goto bail; 619 } 620 621 if (csp.csp_auth_klen) { 622 mackey = malloc(csp.csp_auth_klen, M_XDATA, 623 M_WAITOK); 624 error = copyin(sop->mackey, mackey, 625 csp.csp_auth_klen); 626 if (error) { 627 CRYPTDEB("invalid mac key"); 628 SDT_PROBE1(opencrypto, dev, ioctl, 629 error, __LINE__); 630 goto bail; 631 } 632 csp.csp_auth_key = mackey; 633 } 634 635 if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC) 636 csp.csp_ivlen = AES_GCM_IV_LEN; 637 if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC) 638 csp.csp_ivlen = AES_CCM_IV_LEN; 639 } 640 641 /* NB: CIOCGSESSION2 has the crid */ 642 if (cmd == CIOCGSESSION2 643 #ifdef COMPAT_FREEBSD32 644 || cmd == CIOCGSESSION232 645 #endif 646 ) { 647 crid = SES2(sop)->crid; 648 error = checkforsoftware(&crid); 649 if (error) { 650 CRYPTDEB("checkforsoftware"); 651 SDT_PROBE1(opencrypto, dev, ioctl, error, 652 __LINE__); 653 goto bail; 654 } 655 } else 656 crid = CRYPTOCAP_F_HARDWARE; 657 error = crypto_newsession(&cses, &csp, crid); 658 if (error) { 659 CRYPTDEB("crypto_newsession"); 660 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 661 goto bail; 662 } 663 664 cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey); 665 666 if (cse == NULL) { 667 crypto_freesession(cses); 668 error = EINVAL; 669 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 670 CRYPTDEB("csecreate"); 671 goto bail; 672 } 673 sop->ses = cse->ses; 674 if (cmd == CIOCGSESSION2 675 #ifdef COMPAT_FREEBSD32 676 || cmd == CIOCGSESSION232 677 #endif 678 ) { 679 /* return hardware/driver id */ 680 SES2(sop)->crid = crypto_ses2hid(cse->cses); 681 } 682 bail: 683 if (error) { 684 free(key, M_XDATA); 685 free(mackey, M_XDATA); 686 } 687 #ifdef COMPAT_FREEBSD32 688 else { 689 if (cmd == CIOCGSESSION32) 690 session_op_to_32(sop, data); 691 else if (cmd == CIOCGSESSION232) 692 session2_op_to_32((struct session2_op *)sop, 693 data); 694 } 695 #endif 696 break; 697 case CIOCFSESSION: 698 ses = *(u_int32_t *)data; 699 if (!csedelete(fcr, ses)) { 700 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 701 return (EINVAL); 702 } 703 break; 704 case CIOCCRYPT: 705 #ifdef COMPAT_FREEBSD32 706 case CIOCCRYPT32: 707 if (cmd == CIOCCRYPT32) { 708 cop = &copc; 709 crypt_op_from_32(data, cop); 710 } else 711 #endif 712 cop = (struct crypt_op *)data; 713 cse = csefind(fcr, cop->ses); 714 if (cse == NULL) { 715 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 716 return (EINVAL); 717 } 718 error = cryptodev_op(cse, cop, active_cred, td); 719 csefree(cse); 720 #ifdef COMPAT_FREEBSD32 721 if (error == 0 && cmd == CIOCCRYPT32) 722 crypt_op_to_32(cop, data); 723 #endif 724 break; 725 case CIOCKEY: 726 case CIOCKEY2: 727 #ifdef COMPAT_FREEBSD32 728 case CIOCKEY32: 729 case CIOCKEY232: 730 #endif 731 if (!crypto_userasymcrypto) { 732 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 733 return (EPERM); /* XXX compat? */ 734 } 735 #ifdef COMPAT_FREEBSD32 736 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) { 737 kop = &kopc; 738 crypt_kop_from_32(data, kop); 739 } else 740 #endif 741 kop = (struct crypt_kop *)data; 742 if (cmd == CIOCKEY 743 #ifdef COMPAT_FREEBSD32 744 || cmd == CIOCKEY32 745 #endif 746 ) { 747 /* NB: crypto core enforces s/w driver use */ 748 kop->crk_crid = 749 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 750 } 751 mtx_lock(&Giant); 752 error = cryptodev_key(kop); 753 mtx_unlock(&Giant); 754 #ifdef COMPAT_FREEBSD32 755 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) 756 crypt_kop_to_32(kop, data); 757 #endif 758 break; 759 case CIOCASYMFEAT: 760 if (!crypto_userasymcrypto) { 761 /* 762 * NB: if user asym crypto operations are 763 * not permitted return "no algorithms" 764 * so well-behaved applications will just 765 * fallback to doing them in software. 766 */ 767 *(int *)data = 0; 768 } else { 769 error = crypto_getfeat((int *)data); 770 if (error) 771 SDT_PROBE1(opencrypto, dev, ioctl, error, 772 __LINE__); 773 } 774 break; 775 case CIOCFINDDEV: 776 error = cryptodev_find((struct crypt_find_op *)data); 777 break; 778 case CIOCCRYPTAEAD: 779 caead = (struct crypt_aead *)data; 780 cse = csefind(fcr, caead->ses); 781 if (cse == NULL) { 782 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 783 return (EINVAL); 784 } 785 error = cryptodev_aead(cse, caead, active_cred, td); 786 csefree(cse); 787 break; 788 default: 789 error = EINVAL; 790 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 791 break; 792 } 793 return (error); 794 #undef SES2 795 } 796 797 static int cryptodev_cb(struct cryptop *); 798 799 static struct cryptop_data * 800 cod_alloc(struct csession *cse, size_t len, struct thread *td) 801 { 802 struct cryptop_data *cod; 803 804 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO); 805 806 cod->cse = cse; 807 cod->buf = malloc(len, M_XDATA, M_WAITOK); 808 return (cod); 809 } 810 811 static void 812 cod_free(struct cryptop_data *cod) 813 { 814 815 free(cod->buf, M_XDATA); 816 free(cod, M_XDATA); 817 } 818 819 static int 820 cryptodev_op( 821 struct csession *cse, 822 struct crypt_op *cop, 823 struct ucred *active_cred, 824 struct thread *td) 825 { 826 struct cryptop_data *cod = NULL; 827 struct cryptop *crp = NULL; 828 int error; 829 830 if (cop->len > 256*1024-4) { 831 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 832 return (E2BIG); 833 } 834 835 if (cse->txform) { 836 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) { 837 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 838 return (EINVAL); 839 } 840 } 841 842 if (cop->mac && cse->hashsize == 0) { 843 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 844 return (EINVAL); 845 } 846 847 /* 848 * The COP_F_CIPHER_FIRST flag predates explicit session 849 * modes, but the only way it was used was for EtA so allow it 850 * as long as it is consistent with EtA. 851 */ 852 if (cop->flags & COP_F_CIPHER_FIRST) { 853 if (cop->op != COP_ENCRYPT) { 854 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 855 return (EINVAL); 856 } 857 } 858 859 cod = cod_alloc(cse, cop->len + cse->hashsize, td); 860 861 crp = crypto_getreq(cse->cses, M_WAITOK); 862 863 error = copyin(cop->src, cod->buf, cop->len); 864 if (error) { 865 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 866 goto bail; 867 } 868 crp->crp_payload_start = 0; 869 crp->crp_payload_length = cop->len; 870 if (cse->hashsize) 871 crp->crp_digest_start = cop->len; 872 873 switch (cse->mode) { 874 case CSP_MODE_COMPRESS: 875 switch (cop->op) { 876 case COP_ENCRYPT: 877 crp->crp_op = CRYPTO_OP_COMPRESS; 878 break; 879 case COP_DECRYPT: 880 crp->crp_op = CRYPTO_OP_DECOMPRESS; 881 break; 882 default: 883 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 884 error = EINVAL; 885 goto bail; 886 } 887 break; 888 case CSP_MODE_CIPHER: 889 switch (cop->op) { 890 case COP_ENCRYPT: 891 crp->crp_op = CRYPTO_OP_ENCRYPT; 892 break; 893 case COP_DECRYPT: 894 crp->crp_op = CRYPTO_OP_DECRYPT; 895 break; 896 default: 897 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 898 error = EINVAL; 899 goto bail; 900 } 901 break; 902 case CSP_MODE_DIGEST: 903 switch (cop->op) { 904 case 0: 905 case COP_ENCRYPT: 906 case COP_DECRYPT: 907 crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST; 908 break; 909 default: 910 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 911 error = EINVAL; 912 goto bail; 913 } 914 break; 915 case CSP_MODE_ETA: 916 switch (cop->op) { 917 case COP_ENCRYPT: 918 crp->crp_op = CRYPTO_OP_ENCRYPT | 919 CRYPTO_OP_COMPUTE_DIGEST; 920 break; 921 case COP_DECRYPT: 922 crp->crp_op = CRYPTO_OP_DECRYPT | 923 CRYPTO_OP_VERIFY_DIGEST; 924 break; 925 default: 926 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 927 error = EINVAL; 928 goto bail; 929 } 930 break; 931 default: 932 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 933 error = EINVAL; 934 goto bail; 935 } 936 937 crp->crp_ilen = cop->len + cse->hashsize; 938 crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH); 939 crp->crp_buf = cod->buf; 940 crp->crp_buf_type = CRYPTO_BUF_CONTIG; 941 crp->crp_callback = cryptodev_cb; 942 crp->crp_opaque = cod; 943 944 if (cop->iv) { 945 if (cse->ivsize == 0) { 946 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 947 error = EINVAL; 948 goto bail; 949 } 950 error = copyin(cop->iv, crp->crp_iv, cse->ivsize); 951 if (error) { 952 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 953 goto bail; 954 } 955 crp->crp_flags |= CRYPTO_F_IV_SEPARATE; 956 } else if (cse->ivsize != 0) { 957 crp->crp_iv_start = 0; 958 crp->crp_payload_start += cse->ivsize; 959 crp->crp_payload_length -= cse->ivsize; 960 } 961 962 if (cop->mac != NULL) { 963 error = copyin(cop->mac, cod->buf + cop->len, cse->hashsize); 964 if (error) { 965 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 966 goto bail; 967 } 968 } 969 again: 970 /* 971 * Let the dispatch run unlocked, then, interlock against the 972 * callback before checking if the operation completed and going 973 * to sleep. This insures drivers don't inherit our lock which 974 * results in a lock order reversal between crypto_dispatch forced 975 * entry and the crypto_done callback into us. 976 */ 977 error = crypto_dispatch(crp); 978 if (error != 0) { 979 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 980 goto bail; 981 } 982 983 mtx_lock(&cse->lock); 984 while (!cod->done) 985 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0); 986 mtx_unlock(&cse->lock); 987 988 if (crp->crp_etype == EAGAIN) { 989 crp->crp_etype = 0; 990 crp->crp_flags &= ~CRYPTO_F_DONE; 991 cod->done = false; 992 goto again; 993 } 994 995 if (crp->crp_etype != 0) { 996 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 997 error = crp->crp_etype; 998 goto bail; 999 } 1000 1001 if (cop->dst != NULL) { 1002 error = copyout(cod->buf, cop->dst, cop->len); 1003 if (error) { 1004 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1005 goto bail; 1006 } 1007 } 1008 1009 if (cop->mac != NULL) { 1010 error = copyout(cod->buf + cop->len, cop->mac, cse->hashsize); 1011 if (error) { 1012 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1013 goto bail; 1014 } 1015 } 1016 1017 bail: 1018 crypto_freereq(crp); 1019 cod_free(cod); 1020 1021 return (error); 1022 } 1023 1024 static int 1025 cryptodev_aead( 1026 struct csession *cse, 1027 struct crypt_aead *caead, 1028 struct ucred *active_cred, 1029 struct thread *td) 1030 { 1031 struct cryptop_data *cod = NULL; 1032 struct cryptop *crp = NULL; 1033 int error; 1034 1035 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) { 1036 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1037 return (E2BIG); 1038 } 1039 1040 if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL || 1041 (caead->len % cse->txform->blocksize) != 0) { 1042 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1043 return (EINVAL); 1044 } 1045 1046 /* 1047 * The COP_F_CIPHER_FIRST flag predates explicit session 1048 * modes, but the only way it was used was for EtA so allow it 1049 * as long as it is consistent with EtA. 1050 */ 1051 if (caead->flags & COP_F_CIPHER_FIRST) { 1052 if (caead->op != COP_ENCRYPT) { 1053 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1054 return (EINVAL); 1055 } 1056 } 1057 1058 cod = cod_alloc(cse, caead->aadlen + caead->len + cse->hashsize, td); 1059 1060 crp = crypto_getreq(cse->cses, M_WAITOK); 1061 1062 error = copyin(caead->aad, cod->buf, caead->aadlen); 1063 if (error) { 1064 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1065 goto bail; 1066 } 1067 crp->crp_aad_start = 0; 1068 crp->crp_aad_length = caead->aadlen; 1069 1070 error = copyin(caead->src, cod->buf + caead->aadlen, caead->len); 1071 if (error) { 1072 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1073 goto bail; 1074 } 1075 crp->crp_payload_start = caead->aadlen; 1076 crp->crp_payload_length = caead->len; 1077 crp->crp_digest_start = caead->aadlen + caead->len; 1078 1079 switch (cse->mode) { 1080 case CSP_MODE_AEAD: 1081 switch (caead->op) { 1082 case COP_ENCRYPT: 1083 crp->crp_op = CRYPTO_OP_ENCRYPT | 1084 CRYPTO_OP_COMPUTE_DIGEST; 1085 break; 1086 case COP_DECRYPT: 1087 crp->crp_op = CRYPTO_OP_DECRYPT | 1088 CRYPTO_OP_VERIFY_DIGEST; 1089 break; 1090 default: 1091 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1092 error = EINVAL; 1093 goto bail; 1094 } 1095 break; 1096 case CSP_MODE_ETA: 1097 switch (caead->op) { 1098 case COP_ENCRYPT: 1099 crp->crp_op = CRYPTO_OP_ENCRYPT | 1100 CRYPTO_OP_COMPUTE_DIGEST; 1101 break; 1102 case COP_DECRYPT: 1103 crp->crp_op = CRYPTO_OP_DECRYPT | 1104 CRYPTO_OP_VERIFY_DIGEST; 1105 break; 1106 default: 1107 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1108 error = EINVAL; 1109 goto bail; 1110 } 1111 break; 1112 default: 1113 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1114 error = EINVAL; 1115 goto bail; 1116 } 1117 1118 crp->crp_ilen = caead->aadlen + caead->len + cse->hashsize; 1119 crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH); 1120 crp->crp_buf = cod->buf; 1121 crp->crp_buf_type = CRYPTO_BUF_CONTIG; 1122 crp->crp_callback = cryptodev_cb; 1123 crp->crp_opaque = cod; 1124 1125 if (caead->iv) { 1126 /* 1127 * Permit a 16-byte IV for AES-XTS, but only use the 1128 * first 8 bytes as a block number. 1129 */ 1130 if (cse->mode == CSP_MODE_ETA && 1131 caead->ivlen == AES_BLOCK_LEN && 1132 cse->ivsize == AES_XTS_IV_LEN) 1133 caead->ivlen = AES_XTS_IV_LEN; 1134 1135 if (caead->ivlen != cse->ivsize) { 1136 error = EINVAL; 1137 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1138 goto bail; 1139 } 1140 1141 error = copyin(caead->iv, crp->crp_iv, cse->ivsize); 1142 if (error) { 1143 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1144 goto bail; 1145 } 1146 crp->crp_flags |= CRYPTO_F_IV_SEPARATE; 1147 } else { 1148 crp->crp_iv_start = crp->crp_payload_start; 1149 crp->crp_payload_start += cse->ivsize; 1150 crp->crp_payload_length -= cse->ivsize; 1151 } 1152 1153 error = copyin(caead->tag, cod->buf + caead->len + caead->aadlen, 1154 cse->hashsize); 1155 if (error) { 1156 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1157 goto bail; 1158 } 1159 again: 1160 /* 1161 * Let the dispatch run unlocked, then, interlock against the 1162 * callback before checking if the operation completed and going 1163 * to sleep. This insures drivers don't inherit our lock which 1164 * results in a lock order reversal between crypto_dispatch forced 1165 * entry and the crypto_done callback into us. 1166 */ 1167 error = crypto_dispatch(crp); 1168 if (error != 0) { 1169 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1170 goto bail; 1171 } 1172 1173 mtx_lock(&cse->lock); 1174 while (!cod->done) 1175 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0); 1176 mtx_unlock(&cse->lock); 1177 1178 if (crp->crp_etype == EAGAIN) { 1179 crp->crp_etype = 0; 1180 crp->crp_flags &= ~CRYPTO_F_DONE; 1181 cod->done = false; 1182 goto again; 1183 } 1184 1185 if (crp->crp_etype != 0) { 1186 error = crp->crp_etype; 1187 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1188 goto bail; 1189 } 1190 1191 if (caead->dst != NULL) { 1192 error = copyout(cod->buf + caead->aadlen, caead->dst, 1193 caead->len); 1194 if (error) { 1195 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1196 goto bail; 1197 } 1198 } 1199 1200 error = copyout(cod->buf + caead->aadlen + caead->len, caead->tag, 1201 cse->hashsize); 1202 if (error) { 1203 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1204 goto bail; 1205 } 1206 1207 bail: 1208 crypto_freereq(crp); 1209 cod_free(cod); 1210 1211 return (error); 1212 } 1213 1214 static int 1215 cryptodev_cb(struct cryptop *crp) 1216 { 1217 struct cryptop_data *cod = crp->crp_opaque; 1218 1219 /* 1220 * Lock to ensure the wakeup() is not missed by the loops 1221 * waiting on cod->done in cryptodev_op() and 1222 * cryptodev_aead(). 1223 */ 1224 mtx_lock(&cod->cse->lock); 1225 cod->done = true; 1226 mtx_unlock(&cod->cse->lock); 1227 wakeup(cod); 1228 return (0); 1229 } 1230 1231 static void 1232 cryptodevkey_cb(struct cryptkop *krp) 1233 { 1234 1235 wakeup_one(krp); 1236 } 1237 1238 static int 1239 cryptodev_key(struct crypt_kop *kop) 1240 { 1241 struct cryptkop *krp = NULL; 1242 int error = EINVAL; 1243 int in, out, size, i; 1244 1245 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 1246 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1247 return (EFBIG); 1248 } 1249 1250 in = kop->crk_iparams; 1251 out = kop->crk_oparams; 1252 switch (kop->crk_op) { 1253 case CRK_MOD_EXP: 1254 if (in == 3 && out == 1) 1255 break; 1256 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1257 return (EINVAL); 1258 case CRK_MOD_EXP_CRT: 1259 if (in == 6 && out == 1) 1260 break; 1261 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1262 return (EINVAL); 1263 case CRK_DSA_SIGN: 1264 if (in == 5 && out == 2) 1265 break; 1266 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1267 return (EINVAL); 1268 case CRK_DSA_VERIFY: 1269 if (in == 7 && out == 0) 1270 break; 1271 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1272 return (EINVAL); 1273 case CRK_DH_COMPUTE_KEY: 1274 if (in == 3 && out == 1) 1275 break; 1276 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1277 return (EINVAL); 1278 default: 1279 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1280 return (EINVAL); 1281 } 1282 1283 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 1284 if (!krp) { 1285 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1286 return (ENOMEM); 1287 } 1288 krp->krp_op = kop->crk_op; 1289 krp->krp_status = kop->crk_status; 1290 krp->krp_iparams = kop->crk_iparams; 1291 krp->krp_oparams = kop->crk_oparams; 1292 krp->krp_crid = kop->crk_crid; 1293 krp->krp_status = 0; 1294 krp->krp_callback = cryptodevkey_cb; 1295 1296 for (i = 0; i < CRK_MAXPARAM; i++) { 1297 if (kop->crk_param[i].crp_nbits > 65536) { 1298 /* Limit is the same as in OpenBSD */ 1299 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1300 goto fail; 1301 } 1302 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 1303 } 1304 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 1305 size = (krp->krp_param[i].crp_nbits + 7) / 8; 1306 if (size == 0) 1307 continue; 1308 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 1309 if (i >= krp->krp_iparams) 1310 continue; 1311 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 1312 if (error) { 1313 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1314 goto fail; 1315 } 1316 } 1317 1318 error = crypto_kdispatch(krp); 1319 if (error) { 1320 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1321 goto fail; 1322 } 1323 error = tsleep(krp, PSOCK, "crydev", 0); 1324 if (error) { 1325 /* XXX can this happen? if so, how do we recover? */ 1326 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1327 goto fail; 1328 } 1329 1330 kop->crk_crid = krp->krp_hid; /* device that did the work */ 1331 if (krp->krp_status != 0) { 1332 error = krp->krp_status; 1333 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1334 goto fail; 1335 } 1336 1337 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 1338 size = (krp->krp_param[i].crp_nbits + 7) / 8; 1339 if (size == 0) 1340 continue; 1341 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 1342 if (error) { 1343 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1344 goto fail; 1345 } 1346 } 1347 1348 fail: 1349 if (krp) { 1350 kop->crk_status = krp->krp_status; 1351 for (i = 0; i < CRK_MAXPARAM; i++) { 1352 if (krp->krp_param[i].crp_p) 1353 free(krp->krp_param[i].crp_p, M_XDATA); 1354 } 1355 free(krp, M_XDATA); 1356 } 1357 return (error); 1358 } 1359 1360 static int 1361 cryptodev_find(struct crypt_find_op *find) 1362 { 1363 device_t dev; 1364 size_t fnlen = sizeof find->name; 1365 1366 if (find->crid != -1) { 1367 dev = crypto_find_device_byhid(find->crid); 1368 if (dev == NULL) 1369 return (ENOENT); 1370 strncpy(find->name, device_get_nameunit(dev), fnlen); 1371 find->name[fnlen - 1] = '\x0'; 1372 } else { 1373 find->name[fnlen - 1] = '\x0'; 1374 find->crid = crypto_find_driver(find->name); 1375 if (find->crid == -1) 1376 return (ENOENT); 1377 } 1378 return (0); 1379 } 1380 1381 /* ARGSUSED */ 1382 static int 1383 cryptof_stat( 1384 struct file *fp, 1385 struct stat *sb, 1386 struct ucred *active_cred, 1387 struct thread *td) 1388 { 1389 1390 return (EOPNOTSUPP); 1391 } 1392 1393 /* ARGSUSED */ 1394 static int 1395 cryptof_close(struct file *fp, struct thread *td) 1396 { 1397 struct fcrypt *fcr = fp->f_data; 1398 struct csession *cse; 1399 1400 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 1401 TAILQ_REMOVE(&fcr->csessions, cse, next); 1402 KASSERT(cse->refs == 1, 1403 ("%s: crypto session %p with %d refs", __func__, cse, 1404 cse->refs)); 1405 csefree(cse); 1406 } 1407 free(fcr, M_XDATA); 1408 fp->f_data = NULL; 1409 return 0; 1410 } 1411 1412 static int 1413 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp) 1414 { 1415 1416 kif->kf_type = KF_TYPE_CRYPTO; 1417 return (0); 1418 } 1419 1420 static struct csession * 1421 csefind(struct fcrypt *fcr, u_int ses) 1422 { 1423 struct csession *cse; 1424 1425 mtx_lock(&fcr->lock); 1426 TAILQ_FOREACH(cse, &fcr->csessions, next) { 1427 if (cse->ses == ses) { 1428 refcount_acquire(&cse->refs); 1429 mtx_unlock(&fcr->lock); 1430 return (cse); 1431 } 1432 } 1433 mtx_unlock(&fcr->lock); 1434 return (NULL); 1435 } 1436 1437 static bool 1438 csedelete(struct fcrypt *fcr, u_int ses) 1439 { 1440 struct csession *cse; 1441 1442 mtx_lock(&fcr->lock); 1443 TAILQ_FOREACH(cse, &fcr->csessions, next) { 1444 if (cse->ses == ses) { 1445 TAILQ_REMOVE(&fcr->csessions, cse, next); 1446 mtx_unlock(&fcr->lock); 1447 csefree(cse); 1448 return (true); 1449 } 1450 } 1451 mtx_unlock(&fcr->lock); 1452 return (false); 1453 } 1454 1455 struct csession * 1456 csecreate(struct fcrypt *fcr, crypto_session_t cses, 1457 struct crypto_session_params *csp, struct enc_xform *txform, 1458 void *key, struct auth_hash *thash, void *mackey) 1459 { 1460 struct csession *cse; 1461 1462 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO); 1463 if (cse == NULL) 1464 return NULL; 1465 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 1466 refcount_init(&cse->refs, 1); 1467 cse->key = key; 1468 cse->mackey = mackey; 1469 cse->mode = csp->csp_mode; 1470 cse->cses = cses; 1471 cse->txform = txform; 1472 if (thash != NULL) 1473 cse->hashsize = thash->hashsize; 1474 else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16) 1475 cse->hashsize = AES_GMAC_HASH_LEN; 1476 else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16) 1477 cse->hashsize = AES_CBC_MAC_HASH_LEN; 1478 cse->ivsize = csp->csp_ivlen; 1479 mtx_lock(&fcr->lock); 1480 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 1481 cse->ses = fcr->sesn++; 1482 mtx_unlock(&fcr->lock); 1483 return (cse); 1484 } 1485 1486 static void 1487 csefree(struct csession *cse) 1488 { 1489 1490 if (!refcount_release(&cse->refs)) 1491 return; 1492 crypto_freesession(cse->cses); 1493 mtx_destroy(&cse->lock); 1494 if (cse->key) 1495 free(cse->key, M_XDATA); 1496 if (cse->mackey) 1497 free(cse->mackey, M_XDATA); 1498 free(cse, M_XDATA); 1499 } 1500 1501 static int 1502 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 1503 { 1504 struct file *f; 1505 struct fcrypt *fcr; 1506 int fd, error; 1507 1508 switch (cmd) { 1509 case CRIOGET: 1510 error = falloc_noinstall(td, &f); 1511 if (error) 1512 break; 1513 1514 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO); 1515 TAILQ_INIT(&fcr->csessions); 1516 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF); 1517 1518 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops); 1519 error = finstall(td, f, &fd, 0, NULL); 1520 if (error) { 1521 mtx_destroy(&fcr->lock); 1522 free(fcr, M_XDATA); 1523 } else 1524 *(uint32_t *)data = fd; 1525 fdrop(f, td); 1526 break; 1527 case CRIOFINDDEV: 1528 error = cryptodev_find((struct crypt_find_op *)data); 1529 break; 1530 case CRIOASYMFEAT: 1531 error = crypto_getfeat((int *)data); 1532 break; 1533 default: 1534 error = EINVAL; 1535 break; 1536 } 1537 return (error); 1538 } 1539 1540 static struct cdevsw crypto_cdevsw = { 1541 .d_version = D_VERSION, 1542 .d_ioctl = cryptoioctl, 1543 .d_name = "crypto", 1544 }; 1545 static struct cdev *crypto_dev; 1546 1547 /* 1548 * Initialization code, both for static and dynamic loading. 1549 */ 1550 static int 1551 cryptodev_modevent(module_t mod, int type, void *unused) 1552 { 1553 switch (type) { 1554 case MOD_LOAD: 1555 if (bootverbose) 1556 printf("crypto: <crypto device>\n"); 1557 crypto_dev = make_dev(&crypto_cdevsw, 0, 1558 UID_ROOT, GID_WHEEL, 0666, 1559 "crypto"); 1560 return 0; 1561 case MOD_UNLOAD: 1562 /*XXX disallow if active sessions */ 1563 destroy_dev(crypto_dev); 1564 return 0; 1565 } 1566 return EINVAL; 1567 } 1568 1569 static moduledata_t cryptodev_mod = { 1570 "cryptodev", 1571 cryptodev_modevent, 1572 0 1573 }; 1574 MODULE_VERSION(cryptodev, 1); 1575 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 1576 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 1577 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 1578