1 /*- 2 * Copyright (c) 2005-2008 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * Copyright (c) 2010 Konstantin Belousov <kib@FreeBSD.org> 4 * Copyright (c) 2014-2021 The FreeBSD Foundation 5 * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Portions of this software were developed by John-Mark Gurney 9 * under sponsorship of the FreeBSD Foundation and 10 * Rubicon Communications, LLC (Netgate). 11 * 12 * Portions of this software were developed by Ararat River 13 * Consulting, LLC under sponsorship of the FreeBSD Foundation. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/bus.h> 42 #include <sys/kernel.h> 43 #include <sys/kobj.h> 44 #include <sys/libkern.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/mbuf.h> 48 #include <sys/module.h> 49 #include <sys/mutex.h> 50 #include <sys/smp.h> 51 #include <sys/systm.h> 52 #include <sys/uio.h> 53 54 #include <crypto/aesni/aesni.h> 55 #include <crypto/aesni/sha_sse.h> 56 #include <crypto/sha1.h> 57 #include <crypto/sha2/sha224.h> 58 #include <crypto/sha2/sha256.h> 59 60 #include <opencrypto/cryptodev.h> 61 #include <opencrypto/gmac.h> 62 #include <cryptodev_if.h> 63 64 #include <machine/md_var.h> 65 #include <machine/specialreg.h> 66 #include <machine/fpu.h> 67 68 static struct mtx_padalign *ctx_mtx; 69 static struct fpu_kern_ctx **ctx_fpu; 70 71 struct aesni_softc { 72 int32_t cid; 73 bool has_aes; 74 bool has_sha; 75 }; 76 77 #define ACQUIRE_CTX(i, ctx) \ 78 do { \ 79 (i) = PCPU_GET(cpuid); \ 80 mtx_lock(&ctx_mtx[(i)]); \ 81 (ctx) = ctx_fpu[(i)]; \ 82 } while (0) 83 #define RELEASE_CTX(i, ctx) \ 84 do { \ 85 mtx_unlock(&ctx_mtx[(i)]); \ 86 (i) = -1; \ 87 (ctx) = NULL; \ 88 } while (0) 89 90 static int aesni_cipher_setup(struct aesni_session *ses, 91 const struct crypto_session_params *csp); 92 static int aesni_cipher_process(struct aesni_session *ses, struct cryptop *crp); 93 static int aesni_cipher_crypt(struct aesni_session *ses, struct cryptop *crp, 94 const struct crypto_session_params *csp); 95 static int aesni_cipher_mac(struct aesni_session *ses, struct cryptop *crp, 96 const struct crypto_session_params *csp); 97 98 MALLOC_DEFINE(M_AESNI, "aesni_data", "AESNI Data"); 99 100 static void 101 aesni_identify(driver_t *drv, device_t parent) 102 { 103 104 /* NB: order 10 is so we get attached after h/w devices */ 105 if (device_find_child(parent, "aesni", -1) == NULL && 106 BUS_ADD_CHILD(parent, 10, "aesni", -1) == 0) 107 panic("aesni: could not attach"); 108 } 109 110 static void 111 detect_cpu_features(bool *has_aes, bool *has_sha) 112 { 113 114 *has_aes = ((cpu_feature2 & CPUID2_AESNI) != 0 && 115 (cpu_feature2 & CPUID2_SSE41) != 0); 116 *has_sha = ((cpu_stdext_feature & CPUID_STDEXT_SHA) != 0 && 117 (cpu_feature2 & CPUID2_SSSE3) != 0); 118 } 119 120 static int 121 aesni_probe(device_t dev) 122 { 123 bool has_aes, has_sha; 124 125 detect_cpu_features(&has_aes, &has_sha); 126 if (!has_aes && !has_sha) { 127 device_printf(dev, "No AES or SHA support.\n"); 128 return (EINVAL); 129 } else if (has_aes && has_sha) 130 device_set_desc(dev, 131 "AES-CBC,AES-CCM,AES-GCM,AES-ICM,AES-XTS,SHA1,SHA256"); 132 else if (has_aes) 133 device_set_desc(dev, 134 "AES-CBC,AES-CCM,AES-GCM,AES-ICM,AES-XTS"); 135 else 136 device_set_desc(dev, "SHA1,SHA256"); 137 138 return (0); 139 } 140 141 static void 142 aesni_cleanctx(void) 143 { 144 int i; 145 146 /* XXX - no way to return driverid */ 147 CPU_FOREACH(i) { 148 if (ctx_fpu[i] != NULL) { 149 mtx_destroy(&ctx_mtx[i]); 150 fpu_kern_free_ctx(ctx_fpu[i]); 151 } 152 ctx_fpu[i] = NULL; 153 } 154 free(ctx_mtx, M_AESNI); 155 ctx_mtx = NULL; 156 free(ctx_fpu, M_AESNI); 157 ctx_fpu = NULL; 158 } 159 160 static int 161 aesni_attach(device_t dev) 162 { 163 struct aesni_softc *sc; 164 int i; 165 166 sc = device_get_softc(dev); 167 168 sc->cid = crypto_get_driverid(dev, sizeof(struct aesni_session), 169 CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_SYNC | 170 CRYPTOCAP_F_ACCEL_SOFTWARE); 171 if (sc->cid < 0) { 172 device_printf(dev, "Could not get crypto driver id.\n"); 173 return (ENOMEM); 174 } 175 176 ctx_mtx = malloc(sizeof *ctx_mtx * (mp_maxid + 1), M_AESNI, 177 M_WAITOK|M_ZERO); 178 ctx_fpu = malloc(sizeof *ctx_fpu * (mp_maxid + 1), M_AESNI, 179 M_WAITOK|M_ZERO); 180 181 CPU_FOREACH(i) { 182 #ifdef __amd64__ 183 ctx_fpu[i] = fpu_kern_alloc_ctx_domain( 184 pcpu_find(i)->pc_domain, FPU_KERN_NORMAL); 185 #else 186 ctx_fpu[i] = fpu_kern_alloc_ctx(FPU_KERN_NORMAL); 187 #endif 188 mtx_init(&ctx_mtx[i], "anifpumtx", NULL, MTX_DEF|MTX_NEW); 189 } 190 191 detect_cpu_features(&sc->has_aes, &sc->has_sha); 192 return (0); 193 } 194 195 static int 196 aesni_detach(device_t dev) 197 { 198 struct aesni_softc *sc; 199 200 sc = device_get_softc(dev); 201 202 crypto_unregister_all(sc->cid); 203 204 aesni_cleanctx(); 205 206 return (0); 207 } 208 209 static bool 210 aesni_auth_supported(struct aesni_softc *sc, 211 const struct crypto_session_params *csp) 212 { 213 214 if (!sc->has_sha) 215 return (false); 216 217 switch (csp->csp_auth_alg) { 218 case CRYPTO_SHA1: 219 case CRYPTO_SHA2_224: 220 case CRYPTO_SHA2_256: 221 case CRYPTO_SHA1_HMAC: 222 case CRYPTO_SHA2_224_HMAC: 223 case CRYPTO_SHA2_256_HMAC: 224 break; 225 default: 226 return (false); 227 } 228 229 return (true); 230 } 231 232 static bool 233 aesni_cipher_supported(struct aesni_softc *sc, 234 const struct crypto_session_params *csp) 235 { 236 237 if (!sc->has_aes) 238 return (false); 239 240 switch (csp->csp_cipher_alg) { 241 case CRYPTO_AES_CBC: 242 case CRYPTO_AES_ICM: 243 switch (csp->csp_cipher_klen * 8) { 244 case 128: 245 case 192: 246 case 256: 247 break; 248 default: 249 CRYPTDEB("invalid CBC/ICM key length"); 250 return (false); 251 } 252 if (csp->csp_ivlen != AES_BLOCK_LEN) 253 return (false); 254 break; 255 case CRYPTO_AES_XTS: 256 switch (csp->csp_cipher_klen * 8) { 257 case 256: 258 case 512: 259 break; 260 default: 261 CRYPTDEB("invalid XTS key length"); 262 return (false); 263 } 264 if (csp->csp_ivlen != AES_XTS_IV_LEN) 265 return (false); 266 break; 267 default: 268 return (false); 269 } 270 271 return (true); 272 } 273 274 #define SUPPORTED_SES (CSP_F_SEPARATE_OUTPUT | CSP_F_SEPARATE_AAD | CSP_F_ESN) 275 276 static int 277 aesni_probesession(device_t dev, const struct crypto_session_params *csp) 278 { 279 struct aesni_softc *sc; 280 281 sc = device_get_softc(dev); 282 if ((csp->csp_flags & ~(SUPPORTED_SES)) != 0) 283 return (EINVAL); 284 switch (csp->csp_mode) { 285 case CSP_MODE_DIGEST: 286 if (!aesni_auth_supported(sc, csp)) 287 return (EINVAL); 288 break; 289 case CSP_MODE_CIPHER: 290 if (!aesni_cipher_supported(sc, csp)) 291 return (EINVAL); 292 break; 293 case CSP_MODE_AEAD: 294 switch (csp->csp_cipher_alg) { 295 case CRYPTO_AES_NIST_GCM_16: 296 switch (csp->csp_cipher_klen * 8) { 297 case 128: 298 case 192: 299 case 256: 300 break; 301 default: 302 CRYPTDEB("invalid GCM key length"); 303 return (EINVAL); 304 } 305 if (csp->csp_auth_mlen != 0 && 306 csp->csp_auth_mlen != GMAC_DIGEST_LEN) 307 return (EINVAL); 308 if (csp->csp_ivlen != AES_GCM_IV_LEN || 309 !sc->has_aes) 310 return (EINVAL); 311 break; 312 case CRYPTO_AES_CCM_16: 313 switch (csp->csp_cipher_klen * 8) { 314 case 128: 315 case 192: 316 case 256: 317 break; 318 default: 319 CRYPTDEB("invalid CCM key length"); 320 return (EINVAL); 321 } 322 if (!sc->has_aes) 323 return (EINVAL); 324 break; 325 default: 326 return (EINVAL); 327 } 328 break; 329 case CSP_MODE_ETA: 330 if (!aesni_auth_supported(sc, csp) || 331 !aesni_cipher_supported(sc, csp)) 332 return (EINVAL); 333 break; 334 default: 335 return (EINVAL); 336 } 337 338 return (CRYPTODEV_PROBE_ACCEL_SOFTWARE); 339 } 340 341 static int 342 aesni_newsession(device_t dev, crypto_session_t cses, 343 const struct crypto_session_params *csp) 344 { 345 struct aesni_session *ses; 346 int error; 347 348 ses = crypto_get_driver_session(cses); 349 350 switch (csp->csp_mode) { 351 case CSP_MODE_DIGEST: 352 case CSP_MODE_CIPHER: 353 case CSP_MODE_AEAD: 354 case CSP_MODE_ETA: 355 break; 356 default: 357 return (EINVAL); 358 } 359 error = aesni_cipher_setup(ses, csp); 360 if (error != 0) { 361 CRYPTDEB("setup failed"); 362 return (error); 363 } 364 365 return (0); 366 } 367 368 static int 369 aesni_process(device_t dev, struct cryptop *crp, int hint __unused) 370 { 371 struct aesni_session *ses; 372 int error; 373 374 ses = crypto_get_driver_session(crp->crp_session); 375 376 error = aesni_cipher_process(ses, crp); 377 378 crp->crp_etype = error; 379 crypto_done(crp); 380 return (0); 381 } 382 383 static uint8_t * 384 aesni_cipher_alloc(struct cryptop *crp, int start, int length, bool *allocated) 385 { 386 uint8_t *addr; 387 388 addr = crypto_contiguous_subsegment(crp, start, length); 389 if (addr != NULL) { 390 *allocated = false; 391 return (addr); 392 } 393 addr = malloc(length, M_AESNI, M_NOWAIT); 394 if (addr != NULL) { 395 *allocated = true; 396 crypto_copydata(crp, start, length, addr); 397 } else 398 *allocated = false; 399 return (addr); 400 } 401 402 static device_method_t aesni_methods[] = { 403 DEVMETHOD(device_identify, aesni_identify), 404 DEVMETHOD(device_probe, aesni_probe), 405 DEVMETHOD(device_attach, aesni_attach), 406 DEVMETHOD(device_detach, aesni_detach), 407 408 DEVMETHOD(cryptodev_probesession, aesni_probesession), 409 DEVMETHOD(cryptodev_newsession, aesni_newsession), 410 DEVMETHOD(cryptodev_process, aesni_process), 411 412 DEVMETHOD_END 413 }; 414 415 static driver_t aesni_driver = { 416 "aesni", 417 aesni_methods, 418 sizeof(struct aesni_softc), 419 }; 420 static devclass_t aesni_devclass; 421 422 DRIVER_MODULE(aesni, nexus, aesni_driver, aesni_devclass, 0, 0); 423 MODULE_VERSION(aesni, 1); 424 MODULE_DEPEND(aesni, crypto, 1, 1, 1); 425 426 static int 427 intel_sha1_update(void *vctx, const void *vdata, u_int datalen) 428 { 429 struct sha1_ctxt *ctx = vctx; 430 const char *data = vdata; 431 size_t gaplen; 432 size_t gapstart; 433 size_t off; 434 size_t copysiz; 435 u_int blocks; 436 437 off = 0; 438 /* Do any aligned blocks without redundant copying. */ 439 if (datalen >= 64 && ctx->count % 64 == 0) { 440 blocks = datalen / 64; 441 ctx->c.b64[0] += blocks * 64 * 8; 442 intel_sha1_step(ctx->h.b32, data + off, blocks); 443 off += blocks * 64; 444 } 445 446 while (off < datalen) { 447 gapstart = ctx->count % 64; 448 gaplen = 64 - gapstart; 449 450 copysiz = (gaplen < datalen - off) ? gaplen : datalen - off; 451 bcopy(&data[off], &ctx->m.b8[gapstart], copysiz); 452 ctx->count += copysiz; 453 ctx->count %= 64; 454 ctx->c.b64[0] += copysiz * 8; 455 if (ctx->count % 64 == 0) 456 intel_sha1_step(ctx->h.b32, (void *)ctx->m.b8, 1); 457 off += copysiz; 458 } 459 460 return (0); 461 } 462 463 static void 464 SHA1_Init_fn(void *ctx) 465 { 466 sha1_init(ctx); 467 } 468 469 static void 470 SHA1_Finalize_fn(void *digest, void *ctx) 471 { 472 sha1_result(ctx, digest); 473 } 474 475 static int 476 intel_sha256_update(void *vctx, const void *vdata, u_int len) 477 { 478 SHA256_CTX *ctx = vctx; 479 uint64_t bitlen; 480 uint32_t r; 481 u_int blocks; 482 const unsigned char *src = vdata; 483 484 /* Number of bytes left in the buffer from previous updates */ 485 r = (ctx->count >> 3) & 0x3f; 486 487 /* Convert the length into a number of bits */ 488 bitlen = len << 3; 489 490 /* Update number of bits */ 491 ctx->count += bitlen; 492 493 /* Handle the case where we don't need to perform any transforms */ 494 if (len < 64 - r) { 495 memcpy(&ctx->buf[r], src, len); 496 return (0); 497 } 498 499 /* Finish the current block */ 500 memcpy(&ctx->buf[r], src, 64 - r); 501 intel_sha256_step(ctx->state, ctx->buf, 1); 502 src += 64 - r; 503 len -= 64 - r; 504 505 /* Perform complete blocks */ 506 if (len >= 64) { 507 blocks = len / 64; 508 intel_sha256_step(ctx->state, src, blocks); 509 src += blocks * 64; 510 len -= blocks * 64; 511 } 512 513 /* Copy left over data into buffer */ 514 memcpy(ctx->buf, src, len); 515 516 return (0); 517 } 518 519 static void 520 SHA224_Init_fn(void *ctx) 521 { 522 SHA224_Init(ctx); 523 } 524 525 static void 526 SHA224_Finalize_fn(void *digest, void *ctx) 527 { 528 SHA224_Final(digest, ctx); 529 } 530 531 static void 532 SHA256_Init_fn(void *ctx) 533 { 534 SHA256_Init(ctx); 535 } 536 537 static void 538 SHA256_Finalize_fn(void *digest, void *ctx) 539 { 540 SHA256_Final(digest, ctx); 541 } 542 543 static int 544 aesni_authprepare(struct aesni_session *ses, int klen) 545 { 546 547 if (klen > SHA1_BLOCK_LEN) 548 return (EINVAL); 549 if ((ses->hmac && klen == 0) || (!ses->hmac && klen != 0)) 550 return (EINVAL); 551 return (0); 552 } 553 554 static int 555 aesni_cipher_setup(struct aesni_session *ses, 556 const struct crypto_session_params *csp) 557 { 558 struct fpu_kern_ctx *ctx; 559 uint8_t *schedbase; 560 int kt, ctxidx, error; 561 562 schedbase = (uint8_t *)roundup2((uintptr_t)ses->schedules, 563 AES_SCHED_ALIGN); 564 ses->enc_schedule = schedbase; 565 ses->dec_schedule = schedbase + AES_SCHED_LEN; 566 ses->xts_schedule = schedbase + AES_SCHED_LEN * 2; 567 568 switch (csp->csp_auth_alg) { 569 case CRYPTO_SHA1_HMAC: 570 ses->hmac = true; 571 /* FALLTHROUGH */ 572 case CRYPTO_SHA1: 573 ses->hash_len = SHA1_HASH_LEN; 574 ses->hash_init = SHA1_Init_fn; 575 ses->hash_update = intel_sha1_update; 576 ses->hash_finalize = SHA1_Finalize_fn; 577 break; 578 case CRYPTO_SHA2_224_HMAC: 579 ses->hmac = true; 580 /* FALLTHROUGH */ 581 case CRYPTO_SHA2_224: 582 ses->hash_len = SHA2_224_HASH_LEN; 583 ses->hash_init = SHA224_Init_fn; 584 ses->hash_update = intel_sha256_update; 585 ses->hash_finalize = SHA224_Finalize_fn; 586 break; 587 case CRYPTO_SHA2_256_HMAC: 588 ses->hmac = true; 589 /* FALLTHROUGH */ 590 case CRYPTO_SHA2_256: 591 ses->hash_len = SHA2_256_HASH_LEN; 592 ses->hash_init = SHA256_Init_fn; 593 ses->hash_update = intel_sha256_update; 594 ses->hash_finalize = SHA256_Finalize_fn; 595 break; 596 } 597 598 if (ses->hash_len != 0) { 599 if (csp->csp_auth_mlen == 0) 600 ses->mlen = ses->hash_len; 601 else 602 ses->mlen = csp->csp_auth_mlen; 603 604 error = aesni_authprepare(ses, csp->csp_auth_klen); 605 if (error != 0) 606 return (error); 607 } else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16) { 608 if (csp->csp_auth_mlen == 0) 609 ses->mlen = AES_CBC_MAC_HASH_LEN; 610 else 611 ses->mlen = csp->csp_auth_mlen; 612 } 613 614 kt = is_fpu_kern_thread(0) || (csp->csp_cipher_alg == 0); 615 if (!kt) { 616 ACQUIRE_CTX(ctxidx, ctx); 617 fpu_kern_enter(curthread, ctx, 618 FPU_KERN_NORMAL | FPU_KERN_KTHR); 619 } 620 621 error = 0; 622 if (csp->csp_cipher_key != NULL) 623 aesni_cipher_setup_common(ses, csp, csp->csp_cipher_key, 624 csp->csp_cipher_klen); 625 626 if (!kt) { 627 fpu_kern_leave(curthread, ctx); 628 RELEASE_CTX(ctxidx, ctx); 629 } 630 return (error); 631 } 632 633 static int 634 aesni_cipher_process(struct aesni_session *ses, struct cryptop *crp) 635 { 636 const struct crypto_session_params *csp; 637 struct fpu_kern_ctx *ctx; 638 int error, ctxidx; 639 bool kt; 640 641 csp = crypto_get_params(crp->crp_session); 642 switch (csp->csp_cipher_alg) { 643 case CRYPTO_AES_CCM_16: 644 if (crp->crp_payload_length > ccm_max_payload_length(csp)) 645 return (EMSGSIZE); 646 /* FALLTHROUGH */ 647 case CRYPTO_AES_ICM: 648 case CRYPTO_AES_NIST_GCM_16: 649 if ((crp->crp_flags & CRYPTO_F_IV_SEPARATE) == 0) 650 return (EINVAL); 651 break; 652 case CRYPTO_AES_CBC: 653 case CRYPTO_AES_XTS: 654 /* CBC & XTS can only handle full blocks for now */ 655 if ((crp->crp_payload_length % AES_BLOCK_LEN) != 0) 656 return (EINVAL); 657 break; 658 } 659 660 ctx = NULL; 661 ctxidx = 0; 662 error = 0; 663 kt = is_fpu_kern_thread(0); 664 if (!kt) { 665 ACQUIRE_CTX(ctxidx, ctx); 666 fpu_kern_enter(curthread, ctx, 667 FPU_KERN_NORMAL | FPU_KERN_KTHR); 668 } 669 670 /* Do work */ 671 if (csp->csp_mode == CSP_MODE_ETA) { 672 if (CRYPTO_OP_IS_ENCRYPT(crp->crp_op)) { 673 error = aesni_cipher_crypt(ses, crp, csp); 674 if (error == 0) 675 error = aesni_cipher_mac(ses, crp, csp); 676 } else { 677 error = aesni_cipher_mac(ses, crp, csp); 678 if (error == 0) 679 error = aesni_cipher_crypt(ses, crp, csp); 680 } 681 } else if (csp->csp_mode == CSP_MODE_DIGEST) 682 error = aesni_cipher_mac(ses, crp, csp); 683 else 684 error = aesni_cipher_crypt(ses, crp, csp); 685 686 if (!kt) { 687 fpu_kern_leave(curthread, ctx); 688 RELEASE_CTX(ctxidx, ctx); 689 } 690 return (error); 691 } 692 693 static int 694 aesni_cipher_crypt(struct aesni_session *ses, struct cryptop *crp, 695 const struct crypto_session_params *csp) 696 { 697 uint8_t iv[AES_BLOCK_LEN], tag[GMAC_DIGEST_LEN]; 698 uint8_t *authbuf, *buf, *outbuf; 699 int error; 700 bool encflag, allocated, authallocated, outallocated, outcopy; 701 702 if (crp->crp_payload_length == 0) { 703 buf = NULL; 704 allocated = false; 705 } else { 706 buf = aesni_cipher_alloc(crp, crp->crp_payload_start, 707 crp->crp_payload_length, &allocated); 708 if (buf == NULL) 709 return (ENOMEM); 710 } 711 712 outallocated = false; 713 authallocated = false; 714 authbuf = NULL; 715 if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16 || 716 csp->csp_cipher_alg == CRYPTO_AES_CCM_16) { 717 if (crp->crp_aad_length == 0) { 718 authbuf = NULL; 719 } else if (crp->crp_aad != NULL) { 720 authbuf = crp->crp_aad; 721 } else { 722 authbuf = aesni_cipher_alloc(crp, crp->crp_aad_start, 723 crp->crp_aad_length, &authallocated); 724 if (authbuf == NULL) { 725 error = ENOMEM; 726 goto out; 727 } 728 } 729 } 730 731 if (CRYPTO_HAS_OUTPUT_BUFFER(crp) && crp->crp_payload_length > 0) { 732 outbuf = crypto_buffer_contiguous_subsegment(&crp->crp_obuf, 733 crp->crp_payload_output_start, crp->crp_payload_length); 734 if (outbuf == NULL) { 735 outcopy = true; 736 if (allocated) 737 outbuf = buf; 738 else { 739 outbuf = malloc(crp->crp_payload_length, 740 M_AESNI, M_NOWAIT); 741 if (outbuf == NULL) { 742 error = ENOMEM; 743 goto out; 744 } 745 outallocated = true; 746 } 747 } else 748 outcopy = false; 749 } else { 750 outbuf = buf; 751 outcopy = allocated; 752 } 753 754 error = 0; 755 encflag = CRYPTO_OP_IS_ENCRYPT(crp->crp_op); 756 if (crp->crp_cipher_key != NULL) 757 aesni_cipher_setup_common(ses, csp, crp->crp_cipher_key, 758 csp->csp_cipher_klen); 759 760 crypto_read_iv(crp, iv); 761 762 switch (csp->csp_cipher_alg) { 763 case CRYPTO_AES_CBC: 764 if (encflag) 765 aesni_encrypt_cbc(ses->rounds, ses->enc_schedule, 766 crp->crp_payload_length, buf, outbuf, iv); 767 else { 768 if (buf != outbuf) 769 memcpy(outbuf, buf, crp->crp_payload_length); 770 aesni_decrypt_cbc(ses->rounds, ses->dec_schedule, 771 crp->crp_payload_length, outbuf, iv); 772 } 773 break; 774 case CRYPTO_AES_ICM: 775 /* encryption & decryption are the same */ 776 aesni_encrypt_icm(ses->rounds, ses->enc_schedule, 777 crp->crp_payload_length, buf, outbuf, iv); 778 break; 779 case CRYPTO_AES_XTS: 780 if (encflag) 781 aesni_encrypt_xts(ses->rounds, ses->enc_schedule, 782 ses->xts_schedule, crp->crp_payload_length, buf, 783 outbuf, iv); 784 else 785 aesni_decrypt_xts(ses->rounds, ses->dec_schedule, 786 ses->xts_schedule, crp->crp_payload_length, buf, 787 outbuf, iv); 788 break; 789 case CRYPTO_AES_NIST_GCM_16: 790 if (encflag) { 791 memset(tag, 0, sizeof(tag)); 792 AES_GCM_encrypt(buf, outbuf, authbuf, iv, tag, 793 crp->crp_payload_length, crp->crp_aad_length, 794 csp->csp_ivlen, ses->enc_schedule, ses->rounds); 795 crypto_copyback(crp, crp->crp_digest_start, sizeof(tag), 796 tag); 797 } else { 798 crypto_copydata(crp, crp->crp_digest_start, sizeof(tag), 799 tag); 800 if (!AES_GCM_decrypt(buf, outbuf, authbuf, iv, tag, 801 crp->crp_payload_length, crp->crp_aad_length, 802 csp->csp_ivlen, ses->enc_schedule, ses->rounds)) 803 error = EBADMSG; 804 } 805 break; 806 case CRYPTO_AES_CCM_16: 807 if (encflag) { 808 memset(tag, 0, sizeof(tag)); 809 AES_CCM_encrypt(buf, outbuf, authbuf, iv, tag, 810 crp->crp_payload_length, crp->crp_aad_length, 811 csp->csp_ivlen, ses->mlen, ses->enc_schedule, 812 ses->rounds); 813 crypto_copyback(crp, crp->crp_digest_start, ses->mlen, 814 tag); 815 } else { 816 crypto_copydata(crp, crp->crp_digest_start, ses->mlen, 817 tag); 818 if (!AES_CCM_decrypt(buf, outbuf, authbuf, iv, tag, 819 crp->crp_payload_length, crp->crp_aad_length, 820 csp->csp_ivlen, ses->mlen, ses->enc_schedule, 821 ses->rounds)) 822 error = EBADMSG; 823 } 824 break; 825 } 826 if (outcopy && error == 0) 827 crypto_copyback(crp, CRYPTO_HAS_OUTPUT_BUFFER(crp) ? 828 crp->crp_payload_output_start : crp->crp_payload_start, 829 crp->crp_payload_length, outbuf); 830 831 out: 832 if (allocated) 833 zfree(buf, M_AESNI); 834 if (authallocated) 835 zfree(authbuf, M_AESNI); 836 if (outallocated) 837 zfree(outbuf, M_AESNI); 838 explicit_bzero(iv, sizeof(iv)); 839 explicit_bzero(tag, sizeof(tag)); 840 return (error); 841 } 842 843 static int 844 aesni_cipher_mac(struct aesni_session *ses, struct cryptop *crp, 845 const struct crypto_session_params *csp) 846 { 847 union { 848 struct SHA256Context sha2 __aligned(16); 849 struct sha1_ctxt sha1 __aligned(16); 850 } sctx; 851 uint32_t res[SHA2_256_HASH_LEN / sizeof(uint32_t)]; 852 const uint8_t *key; 853 int i, keylen; 854 855 if (crp->crp_auth_key != NULL) 856 key = crp->crp_auth_key; 857 else 858 key = csp->csp_auth_key; 859 keylen = csp->csp_auth_klen; 860 861 if (ses->hmac) { 862 uint8_t hmac_key[SHA1_BLOCK_LEN] __aligned(16); 863 864 /* Inner hash: (K ^ IPAD) || data */ 865 ses->hash_init(&sctx); 866 for (i = 0; i < keylen; i++) 867 hmac_key[i] = key[i] ^ HMAC_IPAD_VAL; 868 for (i = keylen; i < sizeof(hmac_key); i++) 869 hmac_key[i] = 0 ^ HMAC_IPAD_VAL; 870 ses->hash_update(&sctx, hmac_key, sizeof(hmac_key)); 871 872 if (crp->crp_aad != NULL) 873 ses->hash_update(&sctx, crp->crp_aad, 874 crp->crp_aad_length); 875 else 876 crypto_apply(crp, crp->crp_aad_start, 877 crp->crp_aad_length, ses->hash_update, &sctx); 878 if (CRYPTO_HAS_OUTPUT_BUFFER(crp) && 879 CRYPTO_OP_IS_ENCRYPT(crp->crp_op)) 880 crypto_apply_buf(&crp->crp_obuf, 881 crp->crp_payload_output_start, 882 crp->crp_payload_length, 883 ses->hash_update, &sctx); 884 else 885 crypto_apply(crp, crp->crp_payload_start, 886 crp->crp_payload_length, ses->hash_update, &sctx); 887 888 if (csp->csp_flags & CSP_F_ESN) 889 ses->hash_update(&sctx, crp->crp_esn, 4); 890 891 ses->hash_finalize(res, &sctx); 892 893 /* Outer hash: (K ^ OPAD) || inner hash */ 894 ses->hash_init(&sctx); 895 for (i = 0; i < keylen; i++) 896 hmac_key[i] = key[i] ^ HMAC_OPAD_VAL; 897 for (i = keylen; i < sizeof(hmac_key); i++) 898 hmac_key[i] = 0 ^ HMAC_OPAD_VAL; 899 ses->hash_update(&sctx, hmac_key, sizeof(hmac_key)); 900 ses->hash_update(&sctx, res, ses->hash_len); 901 ses->hash_finalize(res, &sctx); 902 explicit_bzero(hmac_key, sizeof(hmac_key)); 903 } else { 904 ses->hash_init(&sctx); 905 906 if (crp->crp_aad != NULL) 907 ses->hash_update(&sctx, crp->crp_aad, 908 crp->crp_aad_length); 909 else 910 crypto_apply(crp, crp->crp_aad_start, 911 crp->crp_aad_length, ses->hash_update, &sctx); 912 if (CRYPTO_HAS_OUTPUT_BUFFER(crp) && 913 CRYPTO_OP_IS_ENCRYPT(crp->crp_op)) 914 crypto_apply_buf(&crp->crp_obuf, 915 crp->crp_payload_output_start, 916 crp->crp_payload_length, 917 ses->hash_update, &sctx); 918 else 919 crypto_apply(crp, crp->crp_payload_start, 920 crp->crp_payload_length, 921 ses->hash_update, &sctx); 922 923 ses->hash_finalize(res, &sctx); 924 } 925 926 if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) { 927 uint32_t res2[SHA2_256_HASH_LEN / sizeof(uint32_t)]; 928 929 crypto_copydata(crp, crp->crp_digest_start, ses->mlen, res2); 930 if (timingsafe_bcmp(res, res2, ses->mlen) != 0) 931 return (EBADMSG); 932 explicit_bzero(res2, sizeof(res2)); 933 } else 934 crypto_copyback(crp, crp->crp_digest_start, ses->mlen, res); 935 explicit_bzero(res, sizeof(res)); 936 return (0); 937 } 938