1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * AES provider for the Kernel Cryptographic Framework (KCF) 28 */ 29 30 #include <sys/types.h> 31 #include <sys/systm.h> 32 #include <sys/modctl.h> 33 #include <sys/cmn_err.h> 34 #include <sys/ddi.h> 35 #include <sys/crypto/common.h> 36 #include <sys/crypto/impl.h> 37 #include <sys/crypto/spi.h> 38 #include <sys/sysmacros.h> 39 #include <sys/strsun.h> 40 #include <modes/modes.h> 41 #define _AES_FIPS_POST 42 #define _AES_IMPL 43 #include <aes/aes_impl.h> 44 45 extern struct mod_ops mod_cryptoops; 46 47 /* 48 * Module linkage information for the kernel. 49 */ 50 static struct modlcrypto modlcrypto = { 51 &mod_cryptoops, 52 "AES Kernel SW Provider" 53 }; 54 55 static struct modlinkage modlinkage = { 56 MODREV_1, 57 (void *)&modlcrypto, 58 NULL 59 }; 60 61 /* 62 * The following definitions are to keep EXPORT_SRC happy. 63 */ 64 #ifndef AES_MIN_KEY_BYTES 65 #define AES_MIN_KEY_BYTES 0 66 #endif 67 68 #ifndef AES_MAX_KEY_BYTES 69 #define AES_MAX_KEY_BYTES 0 70 #endif 71 72 /* 73 * Mechanism info structure passed to KCF during registration. 74 */ 75 static crypto_mech_info_t aes_mech_info_tab[] = { 76 /* AES_ECB */ 77 {SUN_CKM_AES_ECB, AES_ECB_MECH_INFO_TYPE, 78 CRYPTO_FG_ENCRYPT | CRYPTO_FG_ENCRYPT_ATOMIC | 79 CRYPTO_FG_DECRYPT | CRYPTO_FG_DECRYPT_ATOMIC, 80 AES_MIN_KEY_BYTES, AES_MAX_KEY_BYTES, CRYPTO_KEYSIZE_UNIT_IN_BYTES}, 81 /* AES_CBC */ 82 {SUN_CKM_AES_CBC, AES_CBC_MECH_INFO_TYPE, 83 CRYPTO_FG_ENCRYPT | CRYPTO_FG_ENCRYPT_ATOMIC | 84 CRYPTO_FG_DECRYPT | CRYPTO_FG_DECRYPT_ATOMIC, 85 AES_MIN_KEY_BYTES, AES_MAX_KEY_BYTES, CRYPTO_KEYSIZE_UNIT_IN_BYTES}, 86 /* AES_CTR */ 87 {SUN_CKM_AES_CTR, AES_CTR_MECH_INFO_TYPE, 88 CRYPTO_FG_ENCRYPT | CRYPTO_FG_ENCRYPT_ATOMIC | 89 CRYPTO_FG_DECRYPT | CRYPTO_FG_DECRYPT_ATOMIC, 90 AES_MIN_KEY_BYTES, AES_MAX_KEY_BYTES, CRYPTO_KEYSIZE_UNIT_IN_BYTES}, 91 /* AES_CCM */ 92 {SUN_CKM_AES_CCM, AES_CCM_MECH_INFO_TYPE, 93 CRYPTO_FG_ENCRYPT | CRYPTO_FG_ENCRYPT_ATOMIC | 94 CRYPTO_FG_DECRYPT | CRYPTO_FG_DECRYPT_ATOMIC, 95 AES_MIN_KEY_BYTES, AES_MAX_KEY_BYTES, CRYPTO_KEYSIZE_UNIT_IN_BYTES}, 96 /* AES_GCM */ 97 {SUN_CKM_AES_GCM, AES_GCM_MECH_INFO_TYPE, 98 CRYPTO_FG_ENCRYPT | CRYPTO_FG_ENCRYPT_ATOMIC | 99 CRYPTO_FG_DECRYPT | CRYPTO_FG_DECRYPT_ATOMIC, 100 AES_MIN_KEY_BYTES, AES_MAX_KEY_BYTES, CRYPTO_KEYSIZE_UNIT_IN_BYTES}, 101 /* AES_GMAC */ 102 {SUN_CKM_AES_GMAC, AES_GMAC_MECH_INFO_TYPE, 103 CRYPTO_FG_ENCRYPT | CRYPTO_FG_ENCRYPT_ATOMIC | 104 CRYPTO_FG_DECRYPT | CRYPTO_FG_DECRYPT_ATOMIC | 105 CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC | 106 CRYPTO_FG_SIGN | CRYPTO_FG_SIGN_ATOMIC | 107 CRYPTO_FG_VERIFY | CRYPTO_FG_VERIFY_ATOMIC, 108 AES_MIN_KEY_BYTES, AES_MAX_KEY_BYTES, CRYPTO_KEYSIZE_UNIT_IN_BYTES} 109 }; 110 111 /* operations are in-place if the output buffer is NULL */ 112 #define AES_ARG_INPLACE(input, output) \ 113 if ((output) == NULL) \ 114 (output) = (input); 115 116 static void aes_provider_status(crypto_provider_handle_t, uint_t *); 117 118 static crypto_control_ops_t aes_control_ops = { 119 aes_provider_status 120 }; 121 122 static int aes_encrypt_init(crypto_ctx_t *, crypto_mechanism_t *, 123 crypto_key_t *, crypto_spi_ctx_template_t, crypto_req_handle_t); 124 static int aes_decrypt_init(crypto_ctx_t *, crypto_mechanism_t *, 125 crypto_key_t *, crypto_spi_ctx_template_t, crypto_req_handle_t); 126 static int aes_common_init(crypto_ctx_t *, crypto_mechanism_t *, 127 crypto_key_t *, crypto_spi_ctx_template_t, crypto_req_handle_t, boolean_t); 128 static int aes_common_init_ctx(aes_ctx_t *, crypto_spi_ctx_template_t *, 129 crypto_mechanism_t *, crypto_key_t *, int, boolean_t); 130 static int aes_encrypt_final(crypto_ctx_t *, crypto_data_t *, 131 crypto_req_handle_t); 132 static int aes_decrypt_final(crypto_ctx_t *, crypto_data_t *, 133 crypto_req_handle_t); 134 135 static int aes_encrypt(crypto_ctx_t *, crypto_data_t *, crypto_data_t *, 136 crypto_req_handle_t); 137 static int aes_encrypt_update(crypto_ctx_t *, crypto_data_t *, 138 crypto_data_t *, crypto_req_handle_t); 139 static int aes_encrypt_atomic(crypto_provider_handle_t, crypto_session_id_t, 140 crypto_mechanism_t *, crypto_key_t *, crypto_data_t *, 141 crypto_data_t *, crypto_spi_ctx_template_t, crypto_req_handle_t); 142 143 static int aes_decrypt(crypto_ctx_t *, crypto_data_t *, crypto_data_t *, 144 crypto_req_handle_t); 145 static int aes_decrypt_update(crypto_ctx_t *, crypto_data_t *, 146 crypto_data_t *, crypto_req_handle_t); 147 static int aes_decrypt_atomic(crypto_provider_handle_t, crypto_session_id_t, 148 crypto_mechanism_t *, crypto_key_t *, crypto_data_t *, 149 crypto_data_t *, crypto_spi_ctx_template_t, crypto_req_handle_t); 150 151 static crypto_cipher_ops_t aes_cipher_ops = { 152 aes_encrypt_init, 153 aes_encrypt, 154 aes_encrypt_update, 155 aes_encrypt_final, 156 aes_encrypt_atomic, 157 aes_decrypt_init, 158 aes_decrypt, 159 aes_decrypt_update, 160 aes_decrypt_final, 161 aes_decrypt_atomic 162 }; 163 164 static int aes_mac_atomic(crypto_provider_handle_t, crypto_session_id_t, 165 crypto_mechanism_t *, crypto_key_t *, crypto_data_t *, crypto_data_t *, 166 crypto_spi_ctx_template_t, crypto_req_handle_t); 167 static int aes_mac_verify_atomic(crypto_provider_handle_t, crypto_session_id_t, 168 crypto_mechanism_t *, crypto_key_t *, crypto_data_t *, crypto_data_t *, 169 crypto_spi_ctx_template_t, crypto_req_handle_t); 170 171 static crypto_mac_ops_t aes_mac_ops = { 172 NULL, 173 NULL, 174 NULL, 175 NULL, 176 aes_mac_atomic, 177 aes_mac_verify_atomic 178 }; 179 180 static int aes_create_ctx_template(crypto_provider_handle_t, 181 crypto_mechanism_t *, crypto_key_t *, crypto_spi_ctx_template_t *, 182 size_t *, crypto_req_handle_t); 183 static int aes_free_context(crypto_ctx_t *); 184 185 static crypto_ctx_ops_t aes_ctx_ops = { 186 aes_create_ctx_template, 187 aes_free_context 188 }; 189 190 static void aes_POST(int *); 191 192 static crypto_fips140_ops_t aes_fips140_ops = { 193 aes_POST 194 }; 195 196 static crypto_ops_t aes_crypto_ops = { 197 &aes_control_ops, 198 NULL, 199 &aes_cipher_ops, 200 &aes_mac_ops, 201 NULL, 202 NULL, 203 NULL, 204 NULL, 205 NULL, 206 NULL, 207 NULL, 208 NULL, 209 NULL, 210 &aes_ctx_ops, 211 NULL, 212 NULL, 213 &aes_fips140_ops 214 }; 215 216 static crypto_provider_info_t aes_prov_info = { 217 CRYPTO_SPI_VERSION_4, 218 "AES Software Provider", 219 CRYPTO_SW_PROVIDER, 220 {&modlinkage}, 221 NULL, 222 &aes_crypto_ops, 223 sizeof (aes_mech_info_tab)/sizeof (crypto_mech_info_t), 224 aes_mech_info_tab 225 }; 226 227 static crypto_kcf_provider_handle_t aes_prov_handle = NULL; 228 static crypto_data_t null_crypto_data = { CRYPTO_DATA_RAW }; 229 230 int 231 _init(void) 232 { 233 int ret; 234 235 /* 236 * Register with KCF. If the registration fails, return error. 237 */ 238 if ((ret = crypto_register_provider(&aes_prov_info, 239 &aes_prov_handle)) != CRYPTO_SUCCESS) { 240 cmn_err(CE_WARN, "%s _init: crypto_register_provider()" 241 "failed (0x%x)", CRYPTO_PROVIDER_NAME, ret); 242 return (EACCES); 243 } 244 245 if ((ret = mod_install(&modlinkage)) != 0) { 246 int rv; 247 248 ASSERT(aes_prov_handle != NULL); 249 /* We should not return if the unregister returns busy. */ 250 while ((rv = crypto_unregister_provider(aes_prov_handle)) 251 == CRYPTO_BUSY) { 252 cmn_err(CE_WARN, 253 "%s _init: crypto_unregister_provider() " 254 "failed (0x%x). Retrying.", 255 CRYPTO_PROVIDER_NAME, rv); 256 /* wait 10 seconds and try again. */ 257 delay(10 * drv_usectohz(1000000)); 258 } 259 } 260 261 return (ret); 262 } 263 264 int 265 _fini(void) 266 { 267 int ret; 268 269 /* 270 * Unregister from KCF if previous registration succeeded. 271 */ 272 if (aes_prov_handle != NULL) { 273 if ((ret = crypto_unregister_provider(aes_prov_handle)) != 274 CRYPTO_SUCCESS) { 275 cmn_err(CE_WARN, 276 "%s _fini: crypto_unregister_provider() " 277 "failed (0x%x)", CRYPTO_PROVIDER_NAME, ret); 278 return (EBUSY); 279 } 280 aes_prov_handle = NULL; 281 } 282 283 return (mod_remove(&modlinkage)); 284 } 285 286 int 287 _info(struct modinfo *modinfop) 288 { 289 return (mod_info(&modlinkage, modinfop)); 290 } 291 292 293 static int 294 aes_check_mech_param(crypto_mechanism_t *mechanism, aes_ctx_t **ctx, int kmflag) 295 { 296 void *p = NULL; 297 boolean_t param_required = B_TRUE; 298 size_t param_len; 299 void *(*alloc_fun)(int); 300 int rv = CRYPTO_SUCCESS; 301 302 switch (mechanism->cm_type) { 303 case AES_ECB_MECH_INFO_TYPE: 304 param_required = B_FALSE; 305 alloc_fun = ecb_alloc_ctx; 306 break; 307 case AES_CBC_MECH_INFO_TYPE: 308 param_len = AES_BLOCK_LEN; 309 alloc_fun = cbc_alloc_ctx; 310 break; 311 case AES_CTR_MECH_INFO_TYPE: 312 param_len = sizeof (CK_AES_CTR_PARAMS); 313 alloc_fun = ctr_alloc_ctx; 314 break; 315 case AES_CCM_MECH_INFO_TYPE: 316 param_len = sizeof (CK_AES_CCM_PARAMS); 317 alloc_fun = ccm_alloc_ctx; 318 break; 319 case AES_GCM_MECH_INFO_TYPE: 320 param_len = sizeof (CK_AES_GCM_PARAMS); 321 alloc_fun = gcm_alloc_ctx; 322 break; 323 case AES_GMAC_MECH_INFO_TYPE: 324 param_len = sizeof (CK_AES_GMAC_PARAMS); 325 alloc_fun = gmac_alloc_ctx; 326 break; 327 default: 328 rv = CRYPTO_MECHANISM_INVALID; 329 } 330 if (param_required && mechanism->cm_param != NULL && 331 mechanism->cm_param_len != param_len) { 332 rv = CRYPTO_MECHANISM_PARAM_INVALID; 333 } 334 if (ctx != NULL) { 335 p = (alloc_fun)(kmflag); 336 *ctx = p; 337 } 338 return (rv); 339 } 340 341 /* EXPORT DELETE START */ 342 343 /* 344 * Initialize key schedules for AES 345 */ 346 static int 347 init_keysched(crypto_key_t *key, void *newbie) 348 { 349 /* 350 * Only keys by value are supported by this module. 351 */ 352 switch (key->ck_format) { 353 case CRYPTO_KEY_RAW: 354 if (key->ck_length < AES_MINBITS || 355 key->ck_length > AES_MAXBITS) { 356 return (CRYPTO_KEY_SIZE_RANGE); 357 } 358 359 /* key length must be either 128, 192, or 256 */ 360 if ((key->ck_length & 63) != 0) 361 return (CRYPTO_KEY_SIZE_RANGE); 362 break; 363 default: 364 return (CRYPTO_KEY_TYPE_INCONSISTENT); 365 } 366 367 aes_init_keysched(key->ck_data, key->ck_length, newbie); 368 return (CRYPTO_SUCCESS); 369 } 370 371 /* EXPORT DELETE END */ 372 373 /* 374 * KCF software provider control entry points. 375 */ 376 /* ARGSUSED */ 377 static void 378 aes_provider_status(crypto_provider_handle_t provider, uint_t *status) 379 { 380 *status = CRYPTO_PROVIDER_READY; 381 } 382 383 static int 384 aes_encrypt_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism, 385 crypto_key_t *key, crypto_spi_ctx_template_t template, 386 crypto_req_handle_t req) { 387 return (aes_common_init(ctx, mechanism, key, template, req, B_TRUE)); 388 } 389 390 static int 391 aes_decrypt_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism, 392 crypto_key_t *key, crypto_spi_ctx_template_t template, 393 crypto_req_handle_t req) { 394 return (aes_common_init(ctx, mechanism, key, template, req, B_FALSE)); 395 } 396 397 398 399 /* 400 * KCF software provider encrypt entry points. 401 */ 402 static int 403 aes_common_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism, 404 crypto_key_t *key, crypto_spi_ctx_template_t template, 405 crypto_req_handle_t req, boolean_t is_encrypt_init) 406 { 407 408 /* EXPORT DELETE START */ 409 410 aes_ctx_t *aes_ctx; 411 int rv; 412 int kmflag; 413 414 /* 415 * Only keys by value are supported by this module. 416 */ 417 if (key->ck_format != CRYPTO_KEY_RAW) { 418 return (CRYPTO_KEY_TYPE_INCONSISTENT); 419 } 420 421 kmflag = crypto_kmflag(req); 422 if ((rv = aes_check_mech_param(mechanism, &aes_ctx, kmflag)) 423 != CRYPTO_SUCCESS) 424 return (rv); 425 426 rv = aes_common_init_ctx(aes_ctx, template, mechanism, key, kmflag, 427 is_encrypt_init); 428 if (rv != CRYPTO_SUCCESS) { 429 crypto_free_mode_ctx(aes_ctx); 430 return (rv); 431 } 432 433 ctx->cc_provider_private = aes_ctx; 434 435 /* EXPORT DELETE END */ 436 437 return (CRYPTO_SUCCESS); 438 } 439 440 static void 441 aes_copy_block64(uint8_t *in, uint64_t *out) 442 { 443 if (IS_P2ALIGNED(in, sizeof (uint64_t))) { 444 /* LINTED: pointer alignment */ 445 out[0] = *(uint64_t *)&in[0]; 446 /* LINTED: pointer alignment */ 447 out[1] = *(uint64_t *)&in[8]; 448 } else { 449 uint8_t *iv8 = (uint8_t *)&out[0]; 450 451 AES_COPY_BLOCK(in, iv8); 452 } 453 } 454 455 456 static int 457 aes_encrypt(crypto_ctx_t *ctx, crypto_data_t *plaintext, 458 crypto_data_t *ciphertext, crypto_req_handle_t req) 459 { 460 int ret = CRYPTO_FAILED; 461 462 /* EXPORT DELETE START */ 463 464 aes_ctx_t *aes_ctx; 465 size_t saved_length, saved_offset, length_needed; 466 467 ASSERT(ctx->cc_provider_private != NULL); 468 aes_ctx = ctx->cc_provider_private; 469 470 /* 471 * For block ciphers, plaintext must be a multiple of AES block size. 472 * This test is only valid for ciphers whose blocksize is a power of 2. 473 */ 474 if (((aes_ctx->ac_flags & (CTR_MODE|CCM_MODE|GCM_MODE|GMAC_MODE)) 475 == 0) && (plaintext->cd_length & (AES_BLOCK_LEN - 1)) != 0) 476 return (CRYPTO_DATA_LEN_RANGE); 477 478 AES_ARG_INPLACE(plaintext, ciphertext); 479 480 /* 481 * We need to just return the length needed to store the output. 482 * We should not destroy the context for the following case. 483 */ 484 switch (aes_ctx->ac_flags & (CCM_MODE|GCM_MODE|GMAC_MODE)) { 485 case CCM_MODE: 486 length_needed = plaintext->cd_length + aes_ctx->ac_mac_len; 487 break; 488 case GCM_MODE: 489 length_needed = plaintext->cd_length + aes_ctx->ac_tag_len; 490 break; 491 case GMAC_MODE: 492 if (plaintext->cd_length != 0) 493 return (CRYPTO_ARGUMENTS_BAD); 494 495 length_needed = aes_ctx->ac_tag_len; 496 break; 497 default: 498 length_needed = plaintext->cd_length; 499 } 500 501 if (ciphertext->cd_length < length_needed) { 502 ciphertext->cd_length = length_needed; 503 return (CRYPTO_BUFFER_TOO_SMALL); 504 } 505 506 saved_length = ciphertext->cd_length; 507 saved_offset = ciphertext->cd_offset; 508 509 /* 510 * Do an update on the specified input data. 511 */ 512 ret = aes_encrypt_update(ctx, plaintext, ciphertext, req); 513 if (ret != CRYPTO_SUCCESS) { 514 return (ret); 515 } 516 517 /* 518 * For CCM mode, aes_ccm_encrypt_final() will take care of any 519 * left-over unprocessed data, and compute the MAC 520 */ 521 if (aes_ctx->ac_flags & CCM_MODE) { 522 /* 523 * ccm_encrypt_final() will compute the MAC and append 524 * it to existing ciphertext. So, need to adjust the left over 525 * length value accordingly 526 */ 527 528 /* order of following 2 lines MUST not be reversed */ 529 ciphertext->cd_offset = ciphertext->cd_length; 530 ciphertext->cd_length = saved_length - ciphertext->cd_length; 531 ret = ccm_encrypt_final((ccm_ctx_t *)aes_ctx, ciphertext, 532 AES_BLOCK_LEN, aes_encrypt_block, aes_xor_block); 533 if (ret != CRYPTO_SUCCESS) { 534 return (ret); 535 } 536 537 if (plaintext != ciphertext) { 538 ciphertext->cd_length = 539 ciphertext->cd_offset - saved_offset; 540 } 541 ciphertext->cd_offset = saved_offset; 542 } else if (aes_ctx->ac_flags & (GCM_MODE|GMAC_MODE)) { 543 /* 544 * gcm_encrypt_final() will compute the MAC and append 545 * it to existing ciphertext. So, need to adjust the left over 546 * length value accordingly 547 */ 548 549 /* order of following 2 lines MUST not be reversed */ 550 ciphertext->cd_offset = ciphertext->cd_length; 551 ciphertext->cd_length = saved_length - ciphertext->cd_length; 552 ret = gcm_encrypt_final((gcm_ctx_t *)aes_ctx, ciphertext, 553 AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block, 554 aes_xor_block); 555 if (ret != CRYPTO_SUCCESS) { 556 return (ret); 557 } 558 559 if (plaintext != ciphertext) { 560 ciphertext->cd_length = 561 ciphertext->cd_offset - saved_offset; 562 } 563 ciphertext->cd_offset = saved_offset; 564 } 565 566 ASSERT(aes_ctx->ac_remainder_len == 0); 567 (void) aes_free_context(ctx); 568 569 /* EXPORT DELETE END */ 570 571 return (ret); 572 } 573 574 575 static int 576 aes_decrypt(crypto_ctx_t *ctx, crypto_data_t *ciphertext, 577 crypto_data_t *plaintext, crypto_req_handle_t req) 578 { 579 int ret = CRYPTO_FAILED; 580 581 /* EXPORT DELETE START */ 582 583 aes_ctx_t *aes_ctx; 584 off_t saved_offset; 585 size_t saved_length, length_needed; 586 587 ASSERT(ctx->cc_provider_private != NULL); 588 aes_ctx = ctx->cc_provider_private; 589 590 /* 591 * For block ciphers, plaintext must be a multiple of AES block size. 592 * This test is only valid for ciphers whose blocksize is a power of 2. 593 */ 594 if (((aes_ctx->ac_flags & (CTR_MODE|CCM_MODE|GCM_MODE|GMAC_MODE)) 595 == 0) && (ciphertext->cd_length & (AES_BLOCK_LEN - 1)) != 0) { 596 return (CRYPTO_ENCRYPTED_DATA_LEN_RANGE); 597 } 598 599 AES_ARG_INPLACE(ciphertext, plaintext); 600 601 /* 602 * Return length needed to store the output. 603 * Do not destroy context when plaintext buffer is too small. 604 * 605 * CCM: plaintext is MAC len smaller than cipher text 606 * GCM: plaintext is TAG len smaller than cipher text 607 * GMAC: plaintext length must be zero 608 */ 609 switch (aes_ctx->ac_flags & (CCM_MODE|GCM_MODE|GMAC_MODE)) { 610 case CCM_MODE: 611 length_needed = aes_ctx->ac_processed_data_len; 612 break; 613 case GCM_MODE: 614 length_needed = ciphertext->cd_length - aes_ctx->ac_tag_len; 615 break; 616 case GMAC_MODE: 617 if (plaintext->cd_length != 0) 618 return (CRYPTO_ARGUMENTS_BAD); 619 620 length_needed = 0; 621 break; 622 default: 623 length_needed = ciphertext->cd_length; 624 } 625 626 if (plaintext->cd_length < length_needed) { 627 plaintext->cd_length = length_needed; 628 return (CRYPTO_BUFFER_TOO_SMALL); 629 } 630 631 saved_offset = plaintext->cd_offset; 632 saved_length = plaintext->cd_length; 633 634 /* 635 * Do an update on the specified input data. 636 */ 637 ret = aes_decrypt_update(ctx, ciphertext, plaintext, req); 638 if (ret != CRYPTO_SUCCESS) { 639 goto cleanup; 640 } 641 642 if (aes_ctx->ac_flags & CCM_MODE) { 643 ASSERT(aes_ctx->ac_processed_data_len == aes_ctx->ac_data_len); 644 ASSERT(aes_ctx->ac_processed_mac_len == aes_ctx->ac_mac_len); 645 646 /* order of following 2 lines MUST not be reversed */ 647 plaintext->cd_offset = plaintext->cd_length; 648 plaintext->cd_length = saved_length - plaintext->cd_length; 649 650 ret = ccm_decrypt_final((ccm_ctx_t *)aes_ctx, plaintext, 651 AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block, 652 aes_xor_block); 653 if (ret == CRYPTO_SUCCESS) { 654 if (plaintext != ciphertext) { 655 plaintext->cd_length = 656 plaintext->cd_offset - saved_offset; 657 } 658 } else { 659 plaintext->cd_length = saved_length; 660 } 661 662 plaintext->cd_offset = saved_offset; 663 } else if (aes_ctx->ac_flags & (GCM_MODE|GMAC_MODE)) { 664 /* order of following 2 lines MUST not be reversed */ 665 plaintext->cd_offset = plaintext->cd_length; 666 plaintext->cd_length = saved_length - plaintext->cd_length; 667 668 ret = gcm_decrypt_final((gcm_ctx_t *)aes_ctx, plaintext, 669 AES_BLOCK_LEN, aes_encrypt_block, aes_xor_block); 670 if (ret == CRYPTO_SUCCESS) { 671 if (plaintext != ciphertext) { 672 plaintext->cd_length = 673 plaintext->cd_offset - saved_offset; 674 } 675 } else { 676 plaintext->cd_length = saved_length; 677 } 678 679 plaintext->cd_offset = saved_offset; 680 } 681 682 ASSERT(aes_ctx->ac_remainder_len == 0); 683 684 cleanup: 685 (void) aes_free_context(ctx); 686 687 /* EXPORT DELETE END */ 688 689 return (ret); 690 } 691 692 693 /* ARGSUSED */ 694 static int 695 aes_encrypt_update(crypto_ctx_t *ctx, crypto_data_t *plaintext, 696 crypto_data_t *ciphertext, crypto_req_handle_t req) 697 { 698 off_t saved_offset; 699 size_t saved_length, out_len; 700 int ret = CRYPTO_SUCCESS; 701 aes_ctx_t *aes_ctx; 702 703 ASSERT(ctx->cc_provider_private != NULL); 704 aes_ctx = ctx->cc_provider_private; 705 706 AES_ARG_INPLACE(plaintext, ciphertext); 707 708 /* compute number of bytes that will hold the ciphertext */ 709 out_len = aes_ctx->ac_remainder_len; 710 out_len += plaintext->cd_length; 711 out_len &= ~(AES_BLOCK_LEN - 1); 712 713 /* return length needed to store the output */ 714 if (ciphertext->cd_length < out_len) { 715 ciphertext->cd_length = out_len; 716 return (CRYPTO_BUFFER_TOO_SMALL); 717 } 718 719 saved_offset = ciphertext->cd_offset; 720 saved_length = ciphertext->cd_length; 721 722 /* 723 * Do the AES update on the specified input data. 724 */ 725 switch (plaintext->cd_format) { 726 case CRYPTO_DATA_RAW: 727 ret = crypto_update_iov(ctx->cc_provider_private, 728 plaintext, ciphertext, aes_encrypt_contiguous_blocks, 729 aes_copy_block64); 730 break; 731 case CRYPTO_DATA_UIO: 732 ret = crypto_update_uio(ctx->cc_provider_private, 733 plaintext, ciphertext, aes_encrypt_contiguous_blocks, 734 aes_copy_block64); 735 break; 736 case CRYPTO_DATA_MBLK: 737 ret = crypto_update_mp(ctx->cc_provider_private, 738 plaintext, ciphertext, aes_encrypt_contiguous_blocks, 739 aes_copy_block64); 740 break; 741 default: 742 ret = CRYPTO_ARGUMENTS_BAD; 743 } 744 745 /* 746 * Since AES counter mode is a stream cipher, we call 747 * ctr_mode_final() to pick up any remaining bytes. 748 * It is an internal function that does not destroy 749 * the context like *normal* final routines. 750 */ 751 if ((aes_ctx->ac_flags & CTR_MODE) && (aes_ctx->ac_remainder_len > 0)) { 752 ret = ctr_mode_final((ctr_ctx_t *)aes_ctx, 753 ciphertext, aes_encrypt_block); 754 } 755 756 if (ret == CRYPTO_SUCCESS) { 757 if (plaintext != ciphertext) 758 ciphertext->cd_length = 759 ciphertext->cd_offset - saved_offset; 760 } else { 761 ciphertext->cd_length = saved_length; 762 } 763 ciphertext->cd_offset = saved_offset; 764 765 return (ret); 766 } 767 768 769 static int 770 aes_decrypt_update(crypto_ctx_t *ctx, crypto_data_t *ciphertext, 771 crypto_data_t *plaintext, crypto_req_handle_t req) 772 { 773 off_t saved_offset; 774 size_t saved_length, out_len; 775 int ret = CRYPTO_SUCCESS; 776 aes_ctx_t *aes_ctx; 777 778 ASSERT(ctx->cc_provider_private != NULL); 779 aes_ctx = ctx->cc_provider_private; 780 781 AES_ARG_INPLACE(ciphertext, plaintext); 782 783 /* 784 * Compute number of bytes that will hold the plaintext. 785 * This is not necessary for CCM, GCM, and GMAC since these 786 * mechanisms never return plaintext for update operations. 787 */ 788 if ((aes_ctx->ac_flags & (CCM_MODE|GCM_MODE|GMAC_MODE)) == 0) { 789 out_len = aes_ctx->ac_remainder_len; 790 out_len += ciphertext->cd_length; 791 out_len &= ~(AES_BLOCK_LEN - 1); 792 793 /* return length needed to store the output */ 794 if (plaintext->cd_length < out_len) { 795 plaintext->cd_length = out_len; 796 return (CRYPTO_BUFFER_TOO_SMALL); 797 } 798 } 799 800 saved_offset = plaintext->cd_offset; 801 saved_length = plaintext->cd_length; 802 803 if (aes_ctx->ac_flags & (GCM_MODE|GMAC_MODE)) 804 gcm_set_kmflag((gcm_ctx_t *)aes_ctx, crypto_kmflag(req)); 805 806 /* 807 * Do the AES update on the specified input data. 808 */ 809 switch (ciphertext->cd_format) { 810 case CRYPTO_DATA_RAW: 811 ret = crypto_update_iov(ctx->cc_provider_private, 812 ciphertext, plaintext, aes_decrypt_contiguous_blocks, 813 aes_copy_block64); 814 break; 815 case CRYPTO_DATA_UIO: 816 ret = crypto_update_uio(ctx->cc_provider_private, 817 ciphertext, plaintext, aes_decrypt_contiguous_blocks, 818 aes_copy_block64); 819 break; 820 case CRYPTO_DATA_MBLK: 821 ret = crypto_update_mp(ctx->cc_provider_private, 822 ciphertext, plaintext, aes_decrypt_contiguous_blocks, 823 aes_copy_block64); 824 break; 825 default: 826 ret = CRYPTO_ARGUMENTS_BAD; 827 } 828 829 /* 830 * Since AES counter mode is a stream cipher, we call 831 * ctr_mode_final() to pick up any remaining bytes. 832 * It is an internal function that does not destroy 833 * the context like *normal* final routines. 834 */ 835 if ((aes_ctx->ac_flags & CTR_MODE) && (aes_ctx->ac_remainder_len > 0)) { 836 ret = ctr_mode_final((ctr_ctx_t *)aes_ctx, plaintext, 837 aes_encrypt_block); 838 if (ret == CRYPTO_DATA_LEN_RANGE) 839 ret = CRYPTO_ENCRYPTED_DATA_LEN_RANGE; 840 } 841 842 if (ret == CRYPTO_SUCCESS) { 843 if (ciphertext != plaintext) 844 plaintext->cd_length = 845 plaintext->cd_offset - saved_offset; 846 } else { 847 plaintext->cd_length = saved_length; 848 } 849 plaintext->cd_offset = saved_offset; 850 851 852 return (ret); 853 } 854 855 /* ARGSUSED */ 856 static int 857 aes_encrypt_final(crypto_ctx_t *ctx, crypto_data_t *data, 858 crypto_req_handle_t req) 859 { 860 861 /* EXPORT DELETE START */ 862 863 aes_ctx_t *aes_ctx; 864 int ret; 865 866 ASSERT(ctx->cc_provider_private != NULL); 867 aes_ctx = ctx->cc_provider_private; 868 869 if (data->cd_format != CRYPTO_DATA_RAW && 870 data->cd_format != CRYPTO_DATA_UIO && 871 data->cd_format != CRYPTO_DATA_MBLK) { 872 return (CRYPTO_ARGUMENTS_BAD); 873 } 874 875 if (aes_ctx->ac_flags & CTR_MODE) { 876 if (aes_ctx->ac_remainder_len > 0) { 877 ret = ctr_mode_final((ctr_ctx_t *)aes_ctx, data, 878 aes_encrypt_block); 879 if (ret != CRYPTO_SUCCESS) 880 return (ret); 881 } 882 } else if (aes_ctx->ac_flags & CCM_MODE) { 883 ret = ccm_encrypt_final((ccm_ctx_t *)aes_ctx, data, 884 AES_BLOCK_LEN, aes_encrypt_block, aes_xor_block); 885 if (ret != CRYPTO_SUCCESS) { 886 return (ret); 887 } 888 } else if (aes_ctx->ac_flags & (GCM_MODE|GMAC_MODE)) { 889 size_t saved_offset = data->cd_offset; 890 891 ret = gcm_encrypt_final((gcm_ctx_t *)aes_ctx, data, 892 AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block, 893 aes_xor_block); 894 if (ret != CRYPTO_SUCCESS) { 895 return (ret); 896 } 897 data->cd_length = data->cd_offset - saved_offset; 898 data->cd_offset = saved_offset; 899 } else { 900 /* 901 * There must be no unprocessed plaintext. 902 * This happens if the length of the last data is 903 * not a multiple of the AES block length. 904 */ 905 if (aes_ctx->ac_remainder_len > 0) { 906 return (CRYPTO_DATA_LEN_RANGE); 907 } 908 data->cd_length = 0; 909 } 910 911 (void) aes_free_context(ctx); 912 913 /* EXPORT DELETE END */ 914 915 return (CRYPTO_SUCCESS); 916 } 917 918 /* ARGSUSED */ 919 static int 920 aes_decrypt_final(crypto_ctx_t *ctx, crypto_data_t *data, 921 crypto_req_handle_t req) 922 { 923 924 /* EXPORT DELETE START */ 925 926 aes_ctx_t *aes_ctx; 927 int ret; 928 off_t saved_offset; 929 size_t saved_length; 930 931 ASSERT(ctx->cc_provider_private != NULL); 932 aes_ctx = ctx->cc_provider_private; 933 934 if (data->cd_format != CRYPTO_DATA_RAW && 935 data->cd_format != CRYPTO_DATA_UIO && 936 data->cd_format != CRYPTO_DATA_MBLK) { 937 return (CRYPTO_ARGUMENTS_BAD); 938 } 939 940 /* 941 * There must be no unprocessed ciphertext. 942 * This happens if the length of the last ciphertext is 943 * not a multiple of the AES block length. 944 */ 945 if (aes_ctx->ac_remainder_len > 0) { 946 if ((aes_ctx->ac_flags & CTR_MODE) == 0) 947 return (CRYPTO_ENCRYPTED_DATA_LEN_RANGE); 948 else { 949 ret = ctr_mode_final((ctr_ctx_t *)aes_ctx, data, 950 aes_encrypt_block); 951 if (ret == CRYPTO_DATA_LEN_RANGE) 952 ret = CRYPTO_ENCRYPTED_DATA_LEN_RANGE; 953 if (ret != CRYPTO_SUCCESS) 954 return (ret); 955 } 956 } 957 958 if (aes_ctx->ac_flags & CCM_MODE) { 959 /* 960 * This is where all the plaintext is returned, make sure 961 * the plaintext buffer is big enough 962 */ 963 size_t pt_len = aes_ctx->ac_data_len; 964 if (data->cd_length < pt_len) { 965 data->cd_length = pt_len; 966 return (CRYPTO_BUFFER_TOO_SMALL); 967 } 968 969 ASSERT(aes_ctx->ac_processed_data_len == pt_len); 970 ASSERT(aes_ctx->ac_processed_mac_len == aes_ctx->ac_mac_len); 971 saved_offset = data->cd_offset; 972 saved_length = data->cd_length; 973 ret = ccm_decrypt_final((ccm_ctx_t *)aes_ctx, data, 974 AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block, 975 aes_xor_block); 976 if (ret == CRYPTO_SUCCESS) { 977 data->cd_length = data->cd_offset - saved_offset; 978 } else { 979 data->cd_length = saved_length; 980 } 981 982 data->cd_offset = saved_offset; 983 if (ret != CRYPTO_SUCCESS) { 984 return (ret); 985 } 986 } else if (aes_ctx->ac_flags & (GCM_MODE|GMAC_MODE)) { 987 /* 988 * This is where all the plaintext is returned, make sure 989 * the plaintext buffer is big enough 990 */ 991 gcm_ctx_t *ctx = (gcm_ctx_t *)aes_ctx; 992 size_t pt_len = ctx->gcm_processed_data_len - ctx->gcm_tag_len; 993 994 if (data->cd_length < pt_len) { 995 data->cd_length = pt_len; 996 return (CRYPTO_BUFFER_TOO_SMALL); 997 } 998 999 saved_offset = data->cd_offset; 1000 saved_length = data->cd_length; 1001 ret = gcm_decrypt_final((gcm_ctx_t *)aes_ctx, data, 1002 AES_BLOCK_LEN, aes_encrypt_block, aes_xor_block); 1003 if (ret == CRYPTO_SUCCESS) { 1004 data->cd_length = data->cd_offset - saved_offset; 1005 } else { 1006 data->cd_length = saved_length; 1007 } 1008 1009 data->cd_offset = saved_offset; 1010 if (ret != CRYPTO_SUCCESS) { 1011 return (ret); 1012 } 1013 } 1014 1015 1016 if ((aes_ctx->ac_flags & (CTR_MODE|CCM_MODE|GCM_MODE|GMAC_MODE)) == 0) { 1017 data->cd_length = 0; 1018 } 1019 1020 (void) aes_free_context(ctx); 1021 1022 /* EXPORT DELETE END */ 1023 1024 return (CRYPTO_SUCCESS); 1025 } 1026 1027 /* ARGSUSED */ 1028 static int 1029 aes_encrypt_atomic(crypto_provider_handle_t provider, 1030 crypto_session_id_t session_id, crypto_mechanism_t *mechanism, 1031 crypto_key_t *key, crypto_data_t *plaintext, crypto_data_t *ciphertext, 1032 crypto_spi_ctx_template_t template, crypto_req_handle_t req) 1033 { 1034 aes_ctx_t aes_ctx; /* on the stack */ 1035 off_t saved_offset; 1036 size_t saved_length; 1037 size_t length_needed; 1038 int ret; 1039 1040 AES_ARG_INPLACE(plaintext, ciphertext); 1041 1042 /* 1043 * CTR, CCM, GCM, and GMAC modes do not require that plaintext 1044 * be a multiple of AES block size. 1045 */ 1046 switch (mechanism->cm_type) { 1047 case AES_CTR_MECH_INFO_TYPE: 1048 case AES_CCM_MECH_INFO_TYPE: 1049 case AES_GCM_MECH_INFO_TYPE: 1050 case AES_GMAC_MECH_INFO_TYPE: 1051 break; 1052 default: 1053 if ((plaintext->cd_length & (AES_BLOCK_LEN - 1)) != 0) 1054 return (CRYPTO_DATA_LEN_RANGE); 1055 } 1056 1057 if ((ret = aes_check_mech_param(mechanism, NULL, 0)) != CRYPTO_SUCCESS) 1058 return (ret); 1059 1060 bzero(&aes_ctx, sizeof (aes_ctx_t)); 1061 1062 ret = aes_common_init_ctx(&aes_ctx, template, mechanism, key, 1063 crypto_kmflag(req), B_TRUE); 1064 if (ret != CRYPTO_SUCCESS) 1065 return (ret); 1066 1067 switch (mechanism->cm_type) { 1068 case AES_CCM_MECH_INFO_TYPE: 1069 length_needed = plaintext->cd_length + aes_ctx.ac_mac_len; 1070 break; 1071 case AES_GMAC_MECH_INFO_TYPE: 1072 if (plaintext->cd_length != 0) 1073 return (CRYPTO_ARGUMENTS_BAD); 1074 /* FALLTHRU */ 1075 case AES_GCM_MECH_INFO_TYPE: 1076 length_needed = plaintext->cd_length + aes_ctx.ac_tag_len; 1077 break; 1078 default: 1079 length_needed = plaintext->cd_length; 1080 } 1081 1082 /* return size of buffer needed to store output */ 1083 if (ciphertext->cd_length < length_needed) { 1084 ciphertext->cd_length = length_needed; 1085 ret = CRYPTO_BUFFER_TOO_SMALL; 1086 goto out; 1087 } 1088 1089 saved_offset = ciphertext->cd_offset; 1090 saved_length = ciphertext->cd_length; 1091 1092 /* 1093 * Do an update on the specified input data. 1094 */ 1095 switch (plaintext->cd_format) { 1096 case CRYPTO_DATA_RAW: 1097 ret = crypto_update_iov(&aes_ctx, plaintext, ciphertext, 1098 aes_encrypt_contiguous_blocks, aes_copy_block64); 1099 break; 1100 case CRYPTO_DATA_UIO: 1101 ret = crypto_update_uio(&aes_ctx, plaintext, ciphertext, 1102 aes_encrypt_contiguous_blocks, aes_copy_block64); 1103 break; 1104 case CRYPTO_DATA_MBLK: 1105 ret = crypto_update_mp(&aes_ctx, plaintext, ciphertext, 1106 aes_encrypt_contiguous_blocks, aes_copy_block64); 1107 break; 1108 default: 1109 ret = CRYPTO_ARGUMENTS_BAD; 1110 } 1111 1112 if (ret == CRYPTO_SUCCESS) { 1113 if (mechanism->cm_type == AES_CCM_MECH_INFO_TYPE) { 1114 ret = ccm_encrypt_final((ccm_ctx_t *)&aes_ctx, 1115 ciphertext, AES_BLOCK_LEN, aes_encrypt_block, 1116 aes_xor_block); 1117 if (ret != CRYPTO_SUCCESS) 1118 goto out; 1119 ASSERT(aes_ctx.ac_remainder_len == 0); 1120 } else if (mechanism->cm_type == AES_GCM_MECH_INFO_TYPE || 1121 mechanism->cm_type == AES_GMAC_MECH_INFO_TYPE) { 1122 ret = gcm_encrypt_final((gcm_ctx_t *)&aes_ctx, 1123 ciphertext, AES_BLOCK_LEN, aes_encrypt_block, 1124 aes_copy_block, aes_xor_block); 1125 if (ret != CRYPTO_SUCCESS) 1126 goto out; 1127 ASSERT(aes_ctx.ac_remainder_len == 0); 1128 } else if (mechanism->cm_type == AES_CTR_MECH_INFO_TYPE) { 1129 if (aes_ctx.ac_remainder_len > 0) { 1130 ret = ctr_mode_final((ctr_ctx_t *)&aes_ctx, 1131 ciphertext, aes_encrypt_block); 1132 if (ret != CRYPTO_SUCCESS) 1133 goto out; 1134 } 1135 } else { 1136 ASSERT(aes_ctx.ac_remainder_len == 0); 1137 } 1138 1139 if (plaintext != ciphertext) { 1140 ciphertext->cd_length = 1141 ciphertext->cd_offset - saved_offset; 1142 } 1143 } else { 1144 ciphertext->cd_length = saved_length; 1145 } 1146 ciphertext->cd_offset = saved_offset; 1147 1148 out: 1149 if (aes_ctx.ac_flags & PROVIDER_OWNS_KEY_SCHEDULE) { 1150 bzero(aes_ctx.ac_keysched, aes_ctx.ac_keysched_len); 1151 kmem_free(aes_ctx.ac_keysched, aes_ctx.ac_keysched_len); 1152 } 1153 1154 return (ret); 1155 } 1156 1157 /* ARGSUSED */ 1158 static int 1159 aes_decrypt_atomic(crypto_provider_handle_t provider, 1160 crypto_session_id_t session_id, crypto_mechanism_t *mechanism, 1161 crypto_key_t *key, crypto_data_t *ciphertext, crypto_data_t *plaintext, 1162 crypto_spi_ctx_template_t template, crypto_req_handle_t req) 1163 { 1164 aes_ctx_t aes_ctx; /* on the stack */ 1165 off_t saved_offset; 1166 size_t saved_length; 1167 size_t length_needed; 1168 int ret; 1169 1170 AES_ARG_INPLACE(ciphertext, plaintext); 1171 1172 /* 1173 * CCM, GCM, CTR, and GMAC modes do not require that ciphertext 1174 * be a multiple of AES block size. 1175 */ 1176 switch (mechanism->cm_type) { 1177 case AES_CTR_MECH_INFO_TYPE: 1178 case AES_CCM_MECH_INFO_TYPE: 1179 case AES_GCM_MECH_INFO_TYPE: 1180 case AES_GMAC_MECH_INFO_TYPE: 1181 break; 1182 default: 1183 if ((ciphertext->cd_length & (AES_BLOCK_LEN - 1)) != 0) 1184 return (CRYPTO_ENCRYPTED_DATA_LEN_RANGE); 1185 } 1186 1187 if ((ret = aes_check_mech_param(mechanism, NULL, 0)) != CRYPTO_SUCCESS) 1188 return (ret); 1189 1190 bzero(&aes_ctx, sizeof (aes_ctx_t)); 1191 1192 ret = aes_common_init_ctx(&aes_ctx, template, mechanism, key, 1193 crypto_kmflag(req), B_FALSE); 1194 if (ret != CRYPTO_SUCCESS) 1195 return (ret); 1196 1197 switch (mechanism->cm_type) { 1198 case AES_CCM_MECH_INFO_TYPE: 1199 length_needed = aes_ctx.ac_data_len; 1200 break; 1201 case AES_GCM_MECH_INFO_TYPE: 1202 length_needed = ciphertext->cd_length - aes_ctx.ac_tag_len; 1203 break; 1204 case AES_GMAC_MECH_INFO_TYPE: 1205 if (plaintext->cd_length != 0) 1206 return (CRYPTO_ARGUMENTS_BAD); 1207 length_needed = 0; 1208 break; 1209 default: 1210 length_needed = ciphertext->cd_length; 1211 } 1212 1213 /* return size of buffer needed to store output */ 1214 if (plaintext->cd_length < length_needed) { 1215 plaintext->cd_length = length_needed; 1216 ret = CRYPTO_BUFFER_TOO_SMALL; 1217 goto out; 1218 } 1219 1220 saved_offset = plaintext->cd_offset; 1221 saved_length = plaintext->cd_length; 1222 1223 if (mechanism->cm_type == AES_GCM_MECH_INFO_TYPE || 1224 mechanism->cm_type == AES_GMAC_MECH_INFO_TYPE) 1225 gcm_set_kmflag((gcm_ctx_t *)&aes_ctx, crypto_kmflag(req)); 1226 1227 /* 1228 * Do an update on the specified input data. 1229 */ 1230 switch (ciphertext->cd_format) { 1231 case CRYPTO_DATA_RAW: 1232 ret = crypto_update_iov(&aes_ctx, ciphertext, plaintext, 1233 aes_decrypt_contiguous_blocks, aes_copy_block64); 1234 break; 1235 case CRYPTO_DATA_UIO: 1236 ret = crypto_update_uio(&aes_ctx, ciphertext, plaintext, 1237 aes_decrypt_contiguous_blocks, aes_copy_block64); 1238 break; 1239 case CRYPTO_DATA_MBLK: 1240 ret = crypto_update_mp(&aes_ctx, ciphertext, plaintext, 1241 aes_decrypt_contiguous_blocks, aes_copy_block64); 1242 break; 1243 default: 1244 ret = CRYPTO_ARGUMENTS_BAD; 1245 } 1246 1247 if (ret == CRYPTO_SUCCESS) { 1248 if (mechanism->cm_type == AES_CCM_MECH_INFO_TYPE) { 1249 ASSERT(aes_ctx.ac_processed_data_len 1250 == aes_ctx.ac_data_len); 1251 ASSERT(aes_ctx.ac_processed_mac_len 1252 == aes_ctx.ac_mac_len); 1253 ret = ccm_decrypt_final((ccm_ctx_t *)&aes_ctx, 1254 plaintext, AES_BLOCK_LEN, aes_encrypt_block, 1255 aes_copy_block, aes_xor_block); 1256 ASSERT(aes_ctx.ac_remainder_len == 0); 1257 if ((ret == CRYPTO_SUCCESS) && 1258 (ciphertext != plaintext)) { 1259 plaintext->cd_length = 1260 plaintext->cd_offset - saved_offset; 1261 } else { 1262 plaintext->cd_length = saved_length; 1263 } 1264 } else if (mechanism->cm_type == AES_GCM_MECH_INFO_TYPE || 1265 mechanism->cm_type == AES_GMAC_MECH_INFO_TYPE) { 1266 ret = gcm_decrypt_final((gcm_ctx_t *)&aes_ctx, 1267 plaintext, AES_BLOCK_LEN, aes_encrypt_block, 1268 aes_xor_block); 1269 ASSERT(aes_ctx.ac_remainder_len == 0); 1270 if ((ret == CRYPTO_SUCCESS) && 1271 (ciphertext != plaintext)) { 1272 plaintext->cd_length = 1273 plaintext->cd_offset - saved_offset; 1274 } else { 1275 plaintext->cd_length = saved_length; 1276 } 1277 } else if (mechanism->cm_type != AES_CTR_MECH_INFO_TYPE) { 1278 ASSERT(aes_ctx.ac_remainder_len == 0); 1279 if (ciphertext != plaintext) 1280 plaintext->cd_length = 1281 plaintext->cd_offset - saved_offset; 1282 } else { 1283 if (aes_ctx.ac_remainder_len > 0) { 1284 ret = ctr_mode_final((ctr_ctx_t *)&aes_ctx, 1285 plaintext, aes_encrypt_block); 1286 if (ret == CRYPTO_DATA_LEN_RANGE) 1287 ret = CRYPTO_ENCRYPTED_DATA_LEN_RANGE; 1288 if (ret != CRYPTO_SUCCESS) 1289 goto out; 1290 } 1291 if (ciphertext != plaintext) 1292 plaintext->cd_length = 1293 plaintext->cd_offset - saved_offset; 1294 } 1295 } else { 1296 plaintext->cd_length = saved_length; 1297 } 1298 plaintext->cd_offset = saved_offset; 1299 1300 out: 1301 if (aes_ctx.ac_flags & PROVIDER_OWNS_KEY_SCHEDULE) { 1302 bzero(aes_ctx.ac_keysched, aes_ctx.ac_keysched_len); 1303 kmem_free(aes_ctx.ac_keysched, aes_ctx.ac_keysched_len); 1304 } 1305 1306 if (aes_ctx.ac_flags & CCM_MODE) { 1307 if (aes_ctx.ac_pt_buf != NULL) { 1308 kmem_free(aes_ctx.ac_pt_buf, aes_ctx.ac_data_len); 1309 } 1310 } else if (aes_ctx.ac_flags & (GCM_MODE|GMAC_MODE)) { 1311 if (((gcm_ctx_t *)&aes_ctx)->gcm_pt_buf != NULL) { 1312 kmem_free(((gcm_ctx_t *)&aes_ctx)->gcm_pt_buf, 1313 ((gcm_ctx_t *)&aes_ctx)->gcm_pt_buf_len); 1314 } 1315 } 1316 1317 return (ret); 1318 } 1319 1320 /* 1321 * KCF software provider context template entry points. 1322 */ 1323 /* ARGSUSED */ 1324 static int 1325 aes_create_ctx_template(crypto_provider_handle_t provider, 1326 crypto_mechanism_t *mechanism, crypto_key_t *key, 1327 crypto_spi_ctx_template_t *tmpl, size_t *tmpl_size, crypto_req_handle_t req) 1328 { 1329 1330 /* EXPORT DELETE START */ 1331 1332 void *keysched; 1333 size_t size; 1334 int rv; 1335 1336 if (mechanism->cm_type != AES_ECB_MECH_INFO_TYPE && 1337 mechanism->cm_type != AES_CBC_MECH_INFO_TYPE && 1338 mechanism->cm_type != AES_CTR_MECH_INFO_TYPE && 1339 mechanism->cm_type != AES_CCM_MECH_INFO_TYPE && 1340 mechanism->cm_type != AES_GCM_MECH_INFO_TYPE && 1341 mechanism->cm_type != AES_GMAC_MECH_INFO_TYPE) 1342 return (CRYPTO_MECHANISM_INVALID); 1343 1344 if ((keysched = aes_alloc_keysched(&size, 1345 crypto_kmflag(req))) == NULL) { 1346 return (CRYPTO_HOST_MEMORY); 1347 } 1348 1349 /* 1350 * Initialize key schedule. Key length information is stored 1351 * in the key. 1352 */ 1353 if ((rv = init_keysched(key, keysched)) != CRYPTO_SUCCESS) { 1354 bzero(keysched, size); 1355 kmem_free(keysched, size); 1356 return (rv); 1357 } 1358 1359 *tmpl = keysched; 1360 *tmpl_size = size; 1361 1362 /* EXPORT DELETE END */ 1363 1364 return (CRYPTO_SUCCESS); 1365 } 1366 1367 1368 static int 1369 aes_free_context(crypto_ctx_t *ctx) 1370 { 1371 1372 /* EXPORT DELETE START */ 1373 1374 aes_ctx_t *aes_ctx = ctx->cc_provider_private; 1375 1376 if (aes_ctx != NULL) { 1377 if (aes_ctx->ac_flags & PROVIDER_OWNS_KEY_SCHEDULE) { 1378 ASSERT(aes_ctx->ac_keysched_len != 0); 1379 bzero(aes_ctx->ac_keysched, aes_ctx->ac_keysched_len); 1380 kmem_free(aes_ctx->ac_keysched, 1381 aes_ctx->ac_keysched_len); 1382 } 1383 crypto_free_mode_ctx(aes_ctx); 1384 ctx->cc_provider_private = NULL; 1385 } 1386 1387 /* EXPORT DELETE END */ 1388 1389 return (CRYPTO_SUCCESS); 1390 } 1391 1392 1393 static int 1394 aes_common_init_ctx(aes_ctx_t *aes_ctx, crypto_spi_ctx_template_t *template, 1395 crypto_mechanism_t *mechanism, crypto_key_t *key, int kmflag, 1396 boolean_t is_encrypt_init) 1397 { 1398 int rv = CRYPTO_SUCCESS; 1399 1400 /* EXPORT DELETE START */ 1401 1402 void *keysched; 1403 size_t size; 1404 1405 if (template == NULL) { 1406 if ((keysched = aes_alloc_keysched(&size, kmflag)) == NULL) 1407 return (CRYPTO_HOST_MEMORY); 1408 /* 1409 * Initialize key schedule. 1410 * Key length is stored in the key. 1411 */ 1412 if ((rv = init_keysched(key, keysched)) != CRYPTO_SUCCESS) { 1413 kmem_free(keysched, size); 1414 return (rv); 1415 } 1416 1417 aes_ctx->ac_flags |= PROVIDER_OWNS_KEY_SCHEDULE; 1418 aes_ctx->ac_keysched_len = size; 1419 } else { 1420 keysched = template; 1421 } 1422 aes_ctx->ac_keysched = keysched; 1423 1424 switch (mechanism->cm_type) { 1425 case AES_CBC_MECH_INFO_TYPE: 1426 rv = cbc_init_ctx((cbc_ctx_t *)aes_ctx, mechanism->cm_param, 1427 mechanism->cm_param_len, AES_BLOCK_LEN, aes_copy_block64); 1428 break; 1429 case AES_CTR_MECH_INFO_TYPE: { 1430 CK_AES_CTR_PARAMS *pp; 1431 1432 if (mechanism->cm_param == NULL || 1433 mechanism->cm_param_len != sizeof (CK_AES_CTR_PARAMS)) { 1434 return (CRYPTO_MECHANISM_PARAM_INVALID); 1435 } 1436 pp = (CK_AES_CTR_PARAMS *)(void *)mechanism->cm_param; 1437 rv = ctr_init_ctx((ctr_ctx_t *)aes_ctx, pp->ulCounterBits, 1438 pp->cb, aes_copy_block); 1439 break; 1440 } 1441 case AES_CCM_MECH_INFO_TYPE: 1442 if (mechanism->cm_param == NULL || 1443 mechanism->cm_param_len != sizeof (CK_AES_CCM_PARAMS)) { 1444 return (CRYPTO_MECHANISM_PARAM_INVALID); 1445 } 1446 rv = ccm_init_ctx((ccm_ctx_t *)aes_ctx, mechanism->cm_param, 1447 kmflag, is_encrypt_init, AES_BLOCK_LEN, aes_encrypt_block, 1448 aes_xor_block); 1449 break; 1450 case AES_GCM_MECH_INFO_TYPE: 1451 if (mechanism->cm_param == NULL || 1452 mechanism->cm_param_len != sizeof (CK_AES_GCM_PARAMS)) { 1453 return (CRYPTO_MECHANISM_PARAM_INVALID); 1454 } 1455 rv = gcm_init_ctx((gcm_ctx_t *)aes_ctx, mechanism->cm_param, 1456 AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block, 1457 aes_xor_block); 1458 break; 1459 case AES_GMAC_MECH_INFO_TYPE: 1460 if (mechanism->cm_param == NULL || 1461 mechanism->cm_param_len != sizeof (CK_AES_GMAC_PARAMS)) { 1462 return (CRYPTO_MECHANISM_PARAM_INVALID); 1463 } 1464 rv = gmac_init_ctx((gcm_ctx_t *)aes_ctx, mechanism->cm_param, 1465 AES_BLOCK_LEN, aes_encrypt_block, aes_copy_block, 1466 aes_xor_block); 1467 break; 1468 case AES_ECB_MECH_INFO_TYPE: 1469 aes_ctx->ac_flags |= ECB_MODE; 1470 } 1471 1472 if (rv != CRYPTO_SUCCESS) { 1473 if (aes_ctx->ac_flags & PROVIDER_OWNS_KEY_SCHEDULE) { 1474 bzero(keysched, size); 1475 kmem_free(keysched, size); 1476 } 1477 } 1478 1479 /* EXPORT DELETE END */ 1480 1481 return (rv); 1482 } 1483 1484 static int 1485 process_gmac_mech(crypto_mechanism_t *mech, crypto_data_t *data, 1486 CK_AES_GCM_PARAMS *gcm_params) 1487 { 1488 /* LINTED: pointer alignment */ 1489 CK_AES_GMAC_PARAMS *params = (CK_AES_GMAC_PARAMS *)mech->cm_param; 1490 1491 if (mech->cm_type != AES_GMAC_MECH_INFO_TYPE) 1492 return (CRYPTO_MECHANISM_INVALID); 1493 1494 if (mech->cm_param_len != sizeof (CK_AES_GMAC_PARAMS)) 1495 return (CRYPTO_MECHANISM_PARAM_INVALID); 1496 1497 if (params->pIv == NULL) 1498 return (CRYPTO_MECHANISM_PARAM_INVALID); 1499 1500 gcm_params->pIv = params->pIv; 1501 gcm_params->ulIvLen = AES_GMAC_IV_LEN; 1502 gcm_params->ulTagBits = AES_GMAC_TAG_BITS; 1503 1504 if (data == NULL) 1505 return (CRYPTO_SUCCESS); 1506 1507 if (data->cd_format != CRYPTO_DATA_RAW) 1508 return (CRYPTO_ARGUMENTS_BAD); 1509 1510 gcm_params->pAAD = (uchar_t *)data->cd_raw.iov_base; 1511 gcm_params->ulAADLen = data->cd_length; 1512 return (CRYPTO_SUCCESS); 1513 } 1514 1515 static int 1516 aes_mac_atomic(crypto_provider_handle_t provider, 1517 crypto_session_id_t session_id, crypto_mechanism_t *mechanism, 1518 crypto_key_t *key, crypto_data_t *data, crypto_data_t *mac, 1519 crypto_spi_ctx_template_t template, crypto_req_handle_t req) 1520 { 1521 CK_AES_GCM_PARAMS gcm_params; 1522 crypto_mechanism_t gcm_mech; 1523 int rv; 1524 1525 if ((rv = process_gmac_mech(mechanism, data, &gcm_params)) 1526 != CRYPTO_SUCCESS) 1527 return (rv); 1528 1529 gcm_mech.cm_type = AES_GCM_MECH_INFO_TYPE; 1530 gcm_mech.cm_param_len = sizeof (CK_AES_GCM_PARAMS); 1531 gcm_mech.cm_param = (char *)&gcm_params; 1532 1533 return (aes_encrypt_atomic(provider, session_id, &gcm_mech, 1534 key, &null_crypto_data, mac, template, req)); 1535 } 1536 1537 static int 1538 aes_mac_verify_atomic(crypto_provider_handle_t provider, 1539 crypto_session_id_t session_id, crypto_mechanism_t *mechanism, 1540 crypto_key_t *key, crypto_data_t *data, crypto_data_t *mac, 1541 crypto_spi_ctx_template_t template, crypto_req_handle_t req) 1542 { 1543 CK_AES_GCM_PARAMS gcm_params; 1544 crypto_mechanism_t gcm_mech; 1545 int rv; 1546 1547 if ((rv = process_gmac_mech(mechanism, data, &gcm_params)) 1548 != CRYPTO_SUCCESS) 1549 return (rv); 1550 1551 gcm_mech.cm_type = AES_GCM_MECH_INFO_TYPE; 1552 gcm_mech.cm_param_len = sizeof (CK_AES_GCM_PARAMS); 1553 gcm_mech.cm_param = (char *)&gcm_params; 1554 1555 return (aes_decrypt_atomic(provider, session_id, &gcm_mech, 1556 key, mac, &null_crypto_data, template, req)); 1557 } 1558 1559 /* 1560 * AES Power-Up Self-Test 1561 */ 1562 void 1563 aes_POST(int *rc) 1564 { 1565 1566 int ret; 1567 1568 /* AES Power-Up Self-Test for 128-bit key. */ 1569 ret = fips_aes_post(FIPS_AES_128_KEY_SIZE); 1570 1571 if (ret != CRYPTO_SUCCESS) 1572 goto out; 1573 1574 /* AES Power-Up Self-Test for 192-bit key. */ 1575 ret = fips_aes_post(FIPS_AES_192_KEY_SIZE); 1576 1577 if (ret != CRYPTO_SUCCESS) 1578 goto out; 1579 1580 /* AES Power-Up Self-Test for 256-bit key. */ 1581 ret = fips_aes_post(FIPS_AES_256_KEY_SIZE); 1582 1583 out: 1584 *rc = ret; 1585 1586 } 1587
Indexes created Wed Feb 10 05:58:14 UTC 2010
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