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 #ifdef notdef 510 case CRYPTO_MD5: 511 thash = &auth_hash_md5; 512 break; 513 #endif 514 case CRYPTO_SHA1: 515 thash = &auth_hash_sha1; 516 break; 517 case CRYPTO_SHA2_224: 518 thash = &auth_hash_sha2_224; 519 break; 520 case CRYPTO_SHA2_256: 521 thash = &auth_hash_sha2_256; 522 break; 523 case CRYPTO_SHA2_384: 524 thash = &auth_hash_sha2_384; 525 break; 526 case CRYPTO_SHA2_512: 527 thash = &auth_hash_sha2_512; 528 break; 529 530 case CRYPTO_NULL_HMAC: 531 thash = &auth_hash_null; 532 break; 533 534 case CRYPTO_BLAKE2B: 535 thash = &auth_hash_blake2b; 536 break; 537 case CRYPTO_BLAKE2S: 538 thash = &auth_hash_blake2s; 539 break; 540 541 default: 542 CRYPTDEB("invalid mac"); 543 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 544 return (EINVAL); 545 } 546 547 if (txform == NULL && thash == NULL) 548 return (EINVAL); 549 550 memset(&csp, 0, sizeof(csp)); 551 552 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) { 553 switch (sop->mac) { 554 #ifdef COMPAT_FREEBSD12 555 case CRYPTO_AES_128_NIST_GMAC: 556 case CRYPTO_AES_192_NIST_GMAC: 557 case CRYPTO_AES_256_NIST_GMAC: 558 if (sop->keylen != sop->mackeylen) 559 return (EINVAL); 560 break; 561 #endif 562 case 0: 563 break; 564 default: 565 return (EINVAL); 566 } 567 csp.csp_mode = CSP_MODE_AEAD; 568 } else if (sop->cipher == CRYPTO_AES_CCM_16) { 569 switch (sop->mac) { 570 #ifdef COMPAT_FREEBSD12 571 case CRYPTO_AES_CCM_CBC_MAC: 572 if (sop->keylen != sop->mackeylen) 573 return (EINVAL); 574 thash = NULL; 575 break; 576 #endif 577 case 0: 578 break; 579 default: 580 return (EINVAL); 581 } 582 csp.csp_mode = CSP_MODE_AEAD; 583 } else if (txform && thash) 584 csp.csp_mode = CSP_MODE_ETA; 585 else if (txform) 586 csp.csp_mode = CSP_MODE_CIPHER; 587 else 588 csp.csp_mode = CSP_MODE_DIGEST; 589 590 if (txform) { 591 csp.csp_cipher_alg = txform->type; 592 csp.csp_cipher_klen = sop->keylen; 593 if (sop->keylen > txform->maxkey || 594 sop->keylen < txform->minkey) { 595 CRYPTDEB("invalid cipher parameters"); 596 error = EINVAL; 597 SDT_PROBE1(opencrypto, dev, ioctl, error, 598 __LINE__); 599 goto bail; 600 } 601 602 key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK); 603 error = copyin(sop->key, key, csp.csp_cipher_klen); 604 if (error) { 605 CRYPTDEB("invalid key"); 606 SDT_PROBE1(opencrypto, dev, ioctl, error, 607 __LINE__); 608 goto bail; 609 } 610 csp.csp_cipher_key = key; 611 csp.csp_ivlen = txform->ivsize; 612 } 613 614 if (thash) { 615 csp.csp_auth_alg = thash->type; 616 csp.csp_auth_klen = sop->mackeylen; 617 if (sop->mackeylen > thash->keysize || 618 sop->mackeylen < 0) { 619 CRYPTDEB("invalid mac key length"); 620 error = EINVAL; 621 SDT_PROBE1(opencrypto, dev, ioctl, error, 622 __LINE__); 623 goto bail; 624 } 625 626 if (csp.csp_auth_klen) { 627 mackey = malloc(csp.csp_auth_klen, M_XDATA, 628 M_WAITOK); 629 error = copyin(sop->mackey, mackey, 630 csp.csp_auth_klen); 631 if (error) { 632 CRYPTDEB("invalid mac key"); 633 SDT_PROBE1(opencrypto, dev, ioctl, 634 error, __LINE__); 635 goto bail; 636 } 637 csp.csp_auth_key = mackey; 638 } 639 640 if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC) 641 csp.csp_ivlen = AES_GCM_IV_LEN; 642 if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC) 643 csp.csp_ivlen = AES_CCM_IV_LEN; 644 } 645 646 /* NB: CIOCGSESSION2 has the crid */ 647 if (cmd == CIOCGSESSION2 648 #ifdef COMPAT_FREEBSD32 649 || cmd == CIOCGSESSION232 650 #endif 651 ) { 652 crid = SES2(sop)->crid; 653 error = checkforsoftware(&crid); 654 if (error) { 655 CRYPTDEB("checkforsoftware"); 656 SDT_PROBE1(opencrypto, dev, ioctl, error, 657 __LINE__); 658 goto bail; 659 } 660 } else 661 crid = CRYPTOCAP_F_HARDWARE; 662 error = crypto_newsession(&cses, &csp, crid); 663 if (error) { 664 CRYPTDEB("crypto_newsession"); 665 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 666 goto bail; 667 } 668 669 cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey); 670 671 if (cse == NULL) { 672 crypto_freesession(cses); 673 error = EINVAL; 674 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 675 CRYPTDEB("csecreate"); 676 goto bail; 677 } 678 sop->ses = cse->ses; 679 if (cmd == CIOCGSESSION2 680 #ifdef COMPAT_FREEBSD32 681 || cmd == CIOCGSESSION232 682 #endif 683 ) { 684 /* return hardware/driver id */ 685 SES2(sop)->crid = crypto_ses2hid(cse->cses); 686 } 687 bail: 688 if (error) { 689 free(key, M_XDATA); 690 free(mackey, M_XDATA); 691 } 692 #ifdef COMPAT_FREEBSD32 693 else { 694 if (cmd == CIOCGSESSION32) 695 session_op_to_32(sop, data); 696 else if (cmd == CIOCGSESSION232) 697 session2_op_to_32((struct session2_op *)sop, 698 data); 699 } 700 #endif 701 break; 702 case CIOCFSESSION: 703 ses = *(u_int32_t *)data; 704 if (!csedelete(fcr, ses)) { 705 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 706 return (EINVAL); 707 } 708 break; 709 case CIOCCRYPT: 710 #ifdef COMPAT_FREEBSD32 711 case CIOCCRYPT32: 712 if (cmd == CIOCCRYPT32) { 713 cop = &copc; 714 crypt_op_from_32(data, cop); 715 } else 716 #endif 717 cop = (struct crypt_op *)data; 718 cse = csefind(fcr, cop->ses); 719 if (cse == NULL) { 720 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 721 return (EINVAL); 722 } 723 error = cryptodev_op(cse, cop, active_cred, td); 724 csefree(cse); 725 #ifdef COMPAT_FREEBSD32 726 if (error == 0 && cmd == CIOCCRYPT32) 727 crypt_op_to_32(cop, data); 728 #endif 729 break; 730 case CIOCKEY: 731 case CIOCKEY2: 732 #ifdef COMPAT_FREEBSD32 733 case CIOCKEY32: 734 case CIOCKEY232: 735 #endif 736 if (!crypto_userasymcrypto) { 737 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 738 return (EPERM); /* XXX compat? */ 739 } 740 #ifdef COMPAT_FREEBSD32 741 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) { 742 kop = &kopc; 743 crypt_kop_from_32(data, kop); 744 } else 745 #endif 746 kop = (struct crypt_kop *)data; 747 if (cmd == CIOCKEY 748 #ifdef COMPAT_FREEBSD32 749 || cmd == CIOCKEY32 750 #endif 751 ) { 752 /* NB: crypto core enforces s/w driver use */ 753 kop->crk_crid = 754 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE; 755 } 756 mtx_lock(&Giant); 757 error = cryptodev_key(kop); 758 mtx_unlock(&Giant); 759 #ifdef COMPAT_FREEBSD32 760 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) 761 crypt_kop_to_32(kop, data); 762 #endif 763 break; 764 case CIOCASYMFEAT: 765 if (!crypto_userasymcrypto) { 766 /* 767 * NB: if user asym crypto operations are 768 * not permitted return "no algorithms" 769 * so well-behaved applications will just 770 * fallback to doing them in software. 771 */ 772 *(int *)data = 0; 773 } else { 774 error = crypto_getfeat((int *)data); 775 if (error) 776 SDT_PROBE1(opencrypto, dev, ioctl, error, 777 __LINE__); 778 } 779 break; 780 case CIOCFINDDEV: 781 error = cryptodev_find((struct crypt_find_op *)data); 782 break; 783 case CIOCCRYPTAEAD: 784 caead = (struct crypt_aead *)data; 785 cse = csefind(fcr, caead->ses); 786 if (cse == NULL) { 787 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 788 return (EINVAL); 789 } 790 error = cryptodev_aead(cse, caead, active_cred, td); 791 csefree(cse); 792 break; 793 default: 794 error = EINVAL; 795 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 796 break; 797 } 798 return (error); 799 #undef SES2 800 } 801 802 static int cryptodev_cb(struct cryptop *); 803 804 static struct cryptop_data * 805 cod_alloc(struct csession *cse, size_t len, struct thread *td) 806 { 807 struct cryptop_data *cod; 808 809 cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO); 810 811 cod->cse = cse; 812 cod->buf = malloc(len, M_XDATA, M_WAITOK); 813 return (cod); 814 } 815 816 static void 817 cod_free(struct cryptop_data *cod) 818 { 819 820 free(cod->buf, M_XDATA); 821 free(cod, M_XDATA); 822 } 823 824 static int 825 cryptodev_op( 826 struct csession *cse, 827 struct crypt_op *cop, 828 struct ucred *active_cred, 829 struct thread *td) 830 { 831 struct cryptop_data *cod = NULL; 832 struct cryptop *crp = NULL; 833 int error; 834 835 if (cop->len > 256*1024-4) { 836 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 837 return (E2BIG); 838 } 839 840 if (cse->txform) { 841 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) { 842 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 843 return (EINVAL); 844 } 845 } 846 847 if (cop->mac && cse->hashsize == 0) { 848 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 849 return (EINVAL); 850 } 851 852 /* 853 * The COP_F_CIPHER_FIRST flag predates explicit session 854 * modes, but the only way it was used was for EtA so allow it 855 * as long as it is consistent with EtA. 856 */ 857 if (cop->flags & COP_F_CIPHER_FIRST) { 858 if (cop->op != COP_ENCRYPT) { 859 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 860 return (EINVAL); 861 } 862 } 863 864 cod = cod_alloc(cse, cop->len + cse->hashsize, td); 865 866 crp = crypto_getreq(cse->cses, M_WAITOK); 867 868 error = copyin(cop->src, cod->buf, cop->len); 869 if (error) { 870 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 871 goto bail; 872 } 873 crp->crp_payload_start = 0; 874 crp->crp_payload_length = cop->len; 875 if (cse->hashsize) 876 crp->crp_digest_start = cop->len; 877 878 switch (cse->mode) { 879 case CSP_MODE_COMPRESS: 880 switch (cop->op) { 881 case COP_ENCRYPT: 882 crp->crp_op = CRYPTO_OP_COMPRESS; 883 break; 884 case COP_DECRYPT: 885 crp->crp_op = CRYPTO_OP_DECOMPRESS; 886 break; 887 default: 888 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 889 error = EINVAL; 890 goto bail; 891 } 892 break; 893 case CSP_MODE_CIPHER: 894 switch (cop->op) { 895 case COP_ENCRYPT: 896 crp->crp_op = CRYPTO_OP_ENCRYPT; 897 break; 898 case COP_DECRYPT: 899 crp->crp_op = CRYPTO_OP_DECRYPT; 900 break; 901 default: 902 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 903 error = EINVAL; 904 goto bail; 905 } 906 break; 907 case CSP_MODE_DIGEST: 908 switch (cop->op) { 909 case 0: 910 case COP_ENCRYPT: 911 case COP_DECRYPT: 912 crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST; 913 break; 914 default: 915 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 916 error = EINVAL; 917 goto bail; 918 } 919 break; 920 case CSP_MODE_ETA: 921 switch (cop->op) { 922 case COP_ENCRYPT: 923 crp->crp_op = CRYPTO_OP_ENCRYPT | 924 CRYPTO_OP_COMPUTE_DIGEST; 925 break; 926 case COP_DECRYPT: 927 crp->crp_op = CRYPTO_OP_DECRYPT | 928 CRYPTO_OP_VERIFY_DIGEST; 929 break; 930 default: 931 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 932 error = EINVAL; 933 goto bail; 934 } 935 break; 936 default: 937 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 938 error = EINVAL; 939 goto bail; 940 } 941 942 crp->crp_ilen = cop->len + cse->hashsize; 943 crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH); 944 crp->crp_buf = cod->buf; 945 crp->crp_buf_type = CRYPTO_BUF_CONTIG; 946 crp->crp_callback = cryptodev_cb; 947 crp->crp_opaque = cod; 948 949 if (cop->iv) { 950 if (cse->ivsize == 0) { 951 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 952 error = EINVAL; 953 goto bail; 954 } 955 error = copyin(cop->iv, crp->crp_iv, cse->ivsize); 956 if (error) { 957 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 958 goto bail; 959 } 960 crp->crp_flags |= CRYPTO_F_IV_SEPARATE; 961 } else if (cse->ivsize != 0) { 962 crp->crp_iv_start = 0; 963 crp->crp_payload_start += cse->ivsize; 964 crp->crp_payload_length -= cse->ivsize; 965 } 966 967 if (cop->mac != NULL) { 968 error = copyin(cop->mac, cod->buf + cop->len, cse->hashsize); 969 if (error) { 970 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 971 goto bail; 972 } 973 } 974 again: 975 /* 976 * Let the dispatch run unlocked, then, interlock against the 977 * callback before checking if the operation completed and going 978 * to sleep. This insures drivers don't inherit our lock which 979 * results in a lock order reversal between crypto_dispatch forced 980 * entry and the crypto_done callback into us. 981 */ 982 error = crypto_dispatch(crp); 983 if (error != 0) { 984 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 985 goto bail; 986 } 987 988 mtx_lock(&cse->lock); 989 while (!cod->done) 990 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0); 991 mtx_unlock(&cse->lock); 992 993 if (crp->crp_etype == EAGAIN) { 994 crp->crp_etype = 0; 995 crp->crp_flags &= ~CRYPTO_F_DONE; 996 cod->done = false; 997 goto again; 998 } 999 1000 if (crp->crp_etype != 0) { 1001 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1002 error = crp->crp_etype; 1003 goto bail; 1004 } 1005 1006 if (cop->dst != NULL) { 1007 error = copyout(cod->buf, cop->dst, cop->len); 1008 if (error) { 1009 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1010 goto bail; 1011 } 1012 } 1013 1014 if (cop->mac != NULL) { 1015 error = copyout(cod->buf + cop->len, cop->mac, cse->hashsize); 1016 if (error) { 1017 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1018 goto bail; 1019 } 1020 } 1021 1022 bail: 1023 crypto_freereq(crp); 1024 cod_free(cod); 1025 1026 return (error); 1027 } 1028 1029 static int 1030 cryptodev_aead( 1031 struct csession *cse, 1032 struct crypt_aead *caead, 1033 struct ucred *active_cred, 1034 struct thread *td) 1035 { 1036 struct cryptop_data *cod = NULL; 1037 struct cryptop *crp = NULL; 1038 int error; 1039 1040 if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) { 1041 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1042 return (E2BIG); 1043 } 1044 1045 if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL || 1046 (caead->len % cse->txform->blocksize) != 0) { 1047 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1048 return (EINVAL); 1049 } 1050 1051 /* 1052 * The COP_F_CIPHER_FIRST flag predates explicit session 1053 * modes, but the only way it was used was for EtA so allow it 1054 * as long as it is consistent with EtA. 1055 */ 1056 if (caead->flags & COP_F_CIPHER_FIRST) { 1057 if (caead->op != COP_ENCRYPT) { 1058 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1059 return (EINVAL); 1060 } 1061 } 1062 1063 cod = cod_alloc(cse, caead->aadlen + caead->len + cse->hashsize, td); 1064 1065 crp = crypto_getreq(cse->cses, M_WAITOK); 1066 1067 error = copyin(caead->aad, cod->buf, caead->aadlen); 1068 if (error) { 1069 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1070 goto bail; 1071 } 1072 crp->crp_aad_start = 0; 1073 crp->crp_aad_length = caead->aadlen; 1074 1075 error = copyin(caead->src, cod->buf + caead->aadlen, caead->len); 1076 if (error) { 1077 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1078 goto bail; 1079 } 1080 crp->crp_payload_start = caead->aadlen; 1081 crp->crp_payload_length = caead->len; 1082 crp->crp_digest_start = caead->aadlen + caead->len; 1083 1084 switch (cse->mode) { 1085 case CSP_MODE_AEAD: 1086 switch (caead->op) { 1087 case COP_ENCRYPT: 1088 crp->crp_op = CRYPTO_OP_ENCRYPT | 1089 CRYPTO_OP_COMPUTE_DIGEST; 1090 break; 1091 case COP_DECRYPT: 1092 crp->crp_op = CRYPTO_OP_DECRYPT | 1093 CRYPTO_OP_VERIFY_DIGEST; 1094 break; 1095 default: 1096 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1097 error = EINVAL; 1098 goto bail; 1099 } 1100 break; 1101 case CSP_MODE_ETA: 1102 switch (caead->op) { 1103 case COP_ENCRYPT: 1104 crp->crp_op = CRYPTO_OP_ENCRYPT | 1105 CRYPTO_OP_COMPUTE_DIGEST; 1106 break; 1107 case COP_DECRYPT: 1108 crp->crp_op = CRYPTO_OP_DECRYPT | 1109 CRYPTO_OP_VERIFY_DIGEST; 1110 break; 1111 default: 1112 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1113 error = EINVAL; 1114 goto bail; 1115 } 1116 break; 1117 default: 1118 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1119 error = EINVAL; 1120 goto bail; 1121 } 1122 1123 crp->crp_ilen = caead->aadlen + caead->len + cse->hashsize; 1124 crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH); 1125 crp->crp_buf = cod->buf; 1126 crp->crp_buf_type = CRYPTO_BUF_CONTIG; 1127 crp->crp_callback = cryptodev_cb; 1128 crp->crp_opaque = cod; 1129 1130 if (caead->iv) { 1131 /* 1132 * Permit a 16-byte IV for AES-XTS, but only use the 1133 * first 8 bytes as a block number. 1134 */ 1135 if (cse->mode == CSP_MODE_ETA && 1136 caead->ivlen == AES_BLOCK_LEN && 1137 cse->ivsize == AES_XTS_IV_LEN) 1138 caead->ivlen = AES_XTS_IV_LEN; 1139 1140 if (caead->ivlen != cse->ivsize) { 1141 error = EINVAL; 1142 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1143 goto bail; 1144 } 1145 1146 error = copyin(caead->iv, crp->crp_iv, cse->ivsize); 1147 if (error) { 1148 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1149 goto bail; 1150 } 1151 crp->crp_flags |= CRYPTO_F_IV_SEPARATE; 1152 } else { 1153 crp->crp_iv_start = crp->crp_payload_start; 1154 crp->crp_payload_start += cse->ivsize; 1155 crp->crp_payload_length -= cse->ivsize; 1156 } 1157 1158 error = copyin(caead->tag, cod->buf + caead->len + caead->aadlen, 1159 cse->hashsize); 1160 if (error) { 1161 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1162 goto bail; 1163 } 1164 again: 1165 /* 1166 * Let the dispatch run unlocked, then, interlock against the 1167 * callback before checking if the operation completed and going 1168 * to sleep. This insures drivers don't inherit our lock which 1169 * results in a lock order reversal between crypto_dispatch forced 1170 * entry and the crypto_done callback into us. 1171 */ 1172 error = crypto_dispatch(crp); 1173 if (error != 0) { 1174 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1175 goto bail; 1176 } 1177 1178 mtx_lock(&cse->lock); 1179 while (!cod->done) 1180 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0); 1181 mtx_unlock(&cse->lock); 1182 1183 if (crp->crp_etype == EAGAIN) { 1184 crp->crp_etype = 0; 1185 crp->crp_flags &= ~CRYPTO_F_DONE; 1186 cod->done = false; 1187 goto again; 1188 } 1189 1190 if (crp->crp_etype != 0) { 1191 error = crp->crp_etype; 1192 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1193 goto bail; 1194 } 1195 1196 if (caead->dst != NULL) { 1197 error = copyout(cod->buf + caead->aadlen, caead->dst, 1198 caead->len); 1199 if (error) { 1200 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1201 goto bail; 1202 } 1203 } 1204 1205 error = copyout(cod->buf + caead->aadlen + caead->len, caead->tag, 1206 cse->hashsize); 1207 if (error) { 1208 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1209 goto bail; 1210 } 1211 1212 bail: 1213 crypto_freereq(crp); 1214 cod_free(cod); 1215 1216 return (error); 1217 } 1218 1219 static int 1220 cryptodev_cb(struct cryptop *crp) 1221 { 1222 struct cryptop_data *cod = crp->crp_opaque; 1223 1224 /* 1225 * Lock to ensure the wakeup() is not missed by the loops 1226 * waiting on cod->done in cryptodev_op() and 1227 * cryptodev_aead(). 1228 */ 1229 mtx_lock(&cod->cse->lock); 1230 cod->done = true; 1231 mtx_unlock(&cod->cse->lock); 1232 wakeup(cod); 1233 return (0); 1234 } 1235 1236 static void 1237 cryptodevkey_cb(struct cryptkop *krp) 1238 { 1239 1240 wakeup_one(krp); 1241 } 1242 1243 static int 1244 cryptodev_key(struct crypt_kop *kop) 1245 { 1246 struct cryptkop *krp = NULL; 1247 int error = EINVAL; 1248 int in, out, size, i; 1249 1250 if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { 1251 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1252 return (EFBIG); 1253 } 1254 1255 in = kop->crk_iparams; 1256 out = kop->crk_oparams; 1257 switch (kop->crk_op) { 1258 case CRK_MOD_EXP: 1259 if (in == 3 && out == 1) 1260 break; 1261 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1262 return (EINVAL); 1263 case CRK_MOD_EXP_CRT: 1264 if (in == 6 && out == 1) 1265 break; 1266 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1267 return (EINVAL); 1268 case CRK_DSA_SIGN: 1269 if (in == 5 && out == 2) 1270 break; 1271 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1272 return (EINVAL); 1273 case CRK_DSA_VERIFY: 1274 if (in == 7 && out == 0) 1275 break; 1276 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1277 return (EINVAL); 1278 case CRK_DH_COMPUTE_KEY: 1279 if (in == 3 && out == 1) 1280 break; 1281 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1282 return (EINVAL); 1283 default: 1284 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1285 return (EINVAL); 1286 } 1287 1288 krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO); 1289 if (!krp) { 1290 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1291 return (ENOMEM); 1292 } 1293 krp->krp_op = kop->crk_op; 1294 krp->krp_status = kop->crk_status; 1295 krp->krp_iparams = kop->crk_iparams; 1296 krp->krp_oparams = kop->crk_oparams; 1297 krp->krp_crid = kop->crk_crid; 1298 krp->krp_status = 0; 1299 krp->krp_callback = cryptodevkey_cb; 1300 1301 for (i = 0; i < CRK_MAXPARAM; i++) { 1302 if (kop->crk_param[i].crp_nbits > 65536) { 1303 /* Limit is the same as in OpenBSD */ 1304 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1305 goto fail; 1306 } 1307 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; 1308 } 1309 for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { 1310 size = (krp->krp_param[i].crp_nbits + 7) / 8; 1311 if (size == 0) 1312 continue; 1313 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK); 1314 if (i >= krp->krp_iparams) 1315 continue; 1316 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); 1317 if (error) { 1318 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1319 goto fail; 1320 } 1321 } 1322 1323 error = crypto_kdispatch(krp); 1324 if (error) { 1325 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1326 goto fail; 1327 } 1328 error = tsleep(krp, PSOCK, "crydev", 0); 1329 if (error) { 1330 /* XXX can this happen? if so, how do we recover? */ 1331 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1332 goto fail; 1333 } 1334 1335 kop->crk_crid = krp->krp_hid; /* device that did the work */ 1336 if (krp->krp_status != 0) { 1337 error = krp->krp_status; 1338 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1339 goto fail; 1340 } 1341 1342 for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { 1343 size = (krp->krp_param[i].crp_nbits + 7) / 8; 1344 if (size == 0) 1345 continue; 1346 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); 1347 if (error) { 1348 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); 1349 goto fail; 1350 } 1351 } 1352 1353 fail: 1354 if (krp) { 1355 kop->crk_status = krp->krp_status; 1356 for (i = 0; i < CRK_MAXPARAM; i++) { 1357 if (krp->krp_param[i].crp_p) 1358 free(krp->krp_param[i].crp_p, M_XDATA); 1359 } 1360 free(krp, M_XDATA); 1361 } 1362 return (error); 1363 } 1364 1365 static int 1366 cryptodev_find(struct crypt_find_op *find) 1367 { 1368 device_t dev; 1369 size_t fnlen = sizeof find->name; 1370 1371 if (find->crid != -1) { 1372 dev = crypto_find_device_byhid(find->crid); 1373 if (dev == NULL) 1374 return (ENOENT); 1375 strncpy(find->name, device_get_nameunit(dev), fnlen); 1376 find->name[fnlen - 1] = '\x0'; 1377 } else { 1378 find->name[fnlen - 1] = '\x0'; 1379 find->crid = crypto_find_driver(find->name); 1380 if (find->crid == -1) 1381 return (ENOENT); 1382 } 1383 return (0); 1384 } 1385 1386 /* ARGSUSED */ 1387 static int 1388 cryptof_stat( 1389 struct file *fp, 1390 struct stat *sb, 1391 struct ucred *active_cred, 1392 struct thread *td) 1393 { 1394 1395 return (EOPNOTSUPP); 1396 } 1397 1398 /* ARGSUSED */ 1399 static int 1400 cryptof_close(struct file *fp, struct thread *td) 1401 { 1402 struct fcrypt *fcr = fp->f_data; 1403 struct csession *cse; 1404 1405 while ((cse = TAILQ_FIRST(&fcr->csessions))) { 1406 TAILQ_REMOVE(&fcr->csessions, cse, next); 1407 KASSERT(cse->refs == 1, 1408 ("%s: crypto session %p with %d refs", __func__, cse, 1409 cse->refs)); 1410 csefree(cse); 1411 } 1412 free(fcr, M_XDATA); 1413 fp->f_data = NULL; 1414 return 0; 1415 } 1416 1417 static int 1418 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp) 1419 { 1420 1421 kif->kf_type = KF_TYPE_CRYPTO; 1422 return (0); 1423 } 1424 1425 static struct csession * 1426 csefind(struct fcrypt *fcr, u_int ses) 1427 { 1428 struct csession *cse; 1429 1430 mtx_lock(&fcr->lock); 1431 TAILQ_FOREACH(cse, &fcr->csessions, next) { 1432 if (cse->ses == ses) { 1433 refcount_acquire(&cse->refs); 1434 mtx_unlock(&fcr->lock); 1435 return (cse); 1436 } 1437 } 1438 mtx_unlock(&fcr->lock); 1439 return (NULL); 1440 } 1441 1442 static bool 1443 csedelete(struct fcrypt *fcr, u_int ses) 1444 { 1445 struct csession *cse; 1446 1447 mtx_lock(&fcr->lock); 1448 TAILQ_FOREACH(cse, &fcr->csessions, next) { 1449 if (cse->ses == ses) { 1450 TAILQ_REMOVE(&fcr->csessions, cse, next); 1451 mtx_unlock(&fcr->lock); 1452 csefree(cse); 1453 return (true); 1454 } 1455 } 1456 mtx_unlock(&fcr->lock); 1457 return (false); 1458 } 1459 1460 struct csession * 1461 csecreate(struct fcrypt *fcr, crypto_session_t cses, 1462 struct crypto_session_params *csp, struct enc_xform *txform, 1463 void *key, struct auth_hash *thash, void *mackey) 1464 { 1465 struct csession *cse; 1466 1467 cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO); 1468 if (cse == NULL) 1469 return NULL; 1470 mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF); 1471 refcount_init(&cse->refs, 1); 1472 cse->key = key; 1473 cse->mackey = mackey; 1474 cse->mode = csp->csp_mode; 1475 cse->cses = cses; 1476 cse->txform = txform; 1477 if (thash != NULL) 1478 cse->hashsize = thash->hashsize; 1479 else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16) 1480 cse->hashsize = AES_GMAC_HASH_LEN; 1481 else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16) 1482 cse->hashsize = AES_CBC_MAC_HASH_LEN; 1483 cse->ivsize = csp->csp_ivlen; 1484 mtx_lock(&fcr->lock); 1485 TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); 1486 cse->ses = fcr->sesn++; 1487 mtx_unlock(&fcr->lock); 1488 return (cse); 1489 } 1490 1491 static void 1492 csefree(struct csession *cse) 1493 { 1494 1495 if (!refcount_release(&cse->refs)) 1496 return; 1497 crypto_freesession(cse->cses); 1498 mtx_destroy(&cse->lock); 1499 if (cse->key) 1500 free(cse->key, M_XDATA); 1501 if (cse->mackey) 1502 free(cse->mackey, M_XDATA); 1503 free(cse, M_XDATA); 1504 } 1505 1506 static int 1507 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 1508 { 1509 struct file *f; 1510 struct fcrypt *fcr; 1511 int fd, error; 1512 1513 switch (cmd) { 1514 case CRIOGET: 1515 error = falloc_noinstall(td, &f); 1516 if (error) 1517 break; 1518 1519 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO); 1520 TAILQ_INIT(&fcr->csessions); 1521 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF); 1522 1523 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops); 1524 error = finstall(td, f, &fd, 0, NULL); 1525 if (error) { 1526 mtx_destroy(&fcr->lock); 1527 free(fcr, M_XDATA); 1528 } else 1529 *(uint32_t *)data = fd; 1530 fdrop(f, td); 1531 break; 1532 case CRIOFINDDEV: 1533 error = cryptodev_find((struct crypt_find_op *)data); 1534 break; 1535 case CRIOASYMFEAT: 1536 error = crypto_getfeat((int *)data); 1537 break; 1538 default: 1539 error = EINVAL; 1540 break; 1541 } 1542 return (error); 1543 } 1544 1545 static struct cdevsw crypto_cdevsw = { 1546 .d_version = D_VERSION, 1547 .d_ioctl = cryptoioctl, 1548 .d_name = "crypto", 1549 }; 1550 static struct cdev *crypto_dev; 1551 1552 /* 1553 * Initialization code, both for static and dynamic loading. 1554 */ 1555 static int 1556 cryptodev_modevent(module_t mod, int type, void *unused) 1557 { 1558 switch (type) { 1559 case MOD_LOAD: 1560 if (bootverbose) 1561 printf("crypto: <crypto device>\n"); 1562 crypto_dev = make_dev(&crypto_cdevsw, 0, 1563 UID_ROOT, GID_WHEEL, 0666, 1564 "crypto"); 1565 return 0; 1566 case MOD_UNLOAD: 1567 /*XXX disallow if active sessions */ 1568 destroy_dev(crypto_dev); 1569 return 0; 1570 } 1571 return EINVAL; 1572 } 1573 1574 static moduledata_t cryptodev_mod = { 1575 "cryptodev", 1576 cryptodev_modevent, 1577 0 1578 }; 1579 MODULE_VERSION(cryptodev, 1); 1580 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 1581 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); 1582 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1); 1583