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