1 /* 2 * Copyright (c) 2014, STMicroelectronics International N.V. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #include <stdlib.h> 28 #include <string.h> 29 #include <string_ext.h> 30 31 #include <tee_api.h> 32 #include <tee_api_defines_extensions.h> 33 #include <tee_internal_api_extensions.h> 34 #include <utee_syscalls.h> 35 #include <utee_defines.h> 36 #include <util.h> 37 #include "tee_api_private.h" 38 39 struct __TEE_OperationHandle { 40 TEE_OperationInfo info; 41 TEE_ObjectHandle key1; 42 TEE_ObjectHandle key2; 43 uint32_t operationState;/* Operation state : INITIAL or ACTIVE */ 44 uint8_t *buffer; /* buffer to collect complete blocks */ 45 bool buffer_two_blocks; /* True if two blocks need to be buffered */ 46 size_t block_size; /* Block size of cipher */ 47 size_t buffer_offs; /* Offset in buffer */ 48 uint32_t state; /* Handle to state in TEE Core */ 49 uint32_t ae_tag_len; /* 50 * tag_len in bytes for AE operation else unused 51 */ 52 }; 53 54 /* Cryptographic Operations API - Generic Operation Functions */ 55 56 TEE_Result TEE_AllocateOperation(TEE_OperationHandle *operation, 57 uint32_t algorithm, uint32_t mode, 58 uint32_t maxKeySize) 59 { 60 TEE_Result res; 61 TEE_OperationHandle op = TEE_HANDLE_NULL; 62 uint32_t handle_state = 0; 63 size_t block_size = 1; 64 uint32_t req_key_usage; 65 bool with_private_key = false; 66 bool buffer_two_blocks = false; 67 68 if (!operation) 69 TEE_Panic(0); 70 71 if (algorithm == TEE_ALG_AES_XTS) 72 handle_state = TEE_HANDLE_FLAG_EXPECT_TWO_KEYS; 73 74 /* Check algorithm max key size */ 75 switch (algorithm) { 76 case TEE_ALG_DSA_SHA1: 77 if (maxKeySize < 512) 78 return TEE_ERROR_NOT_SUPPORTED; 79 if (maxKeySize > 1024) 80 return TEE_ERROR_NOT_SUPPORTED; 81 if (maxKeySize % 64 != 0) 82 return TEE_ERROR_NOT_SUPPORTED; 83 break; 84 85 case TEE_ALG_DSA_SHA224: 86 if (maxKeySize != 2048) 87 return TEE_ERROR_NOT_SUPPORTED; 88 break; 89 90 case TEE_ALG_DSA_SHA256: 91 if (maxKeySize != 2048 && maxKeySize != 3072) 92 return TEE_ERROR_NOT_SUPPORTED; 93 break; 94 95 case TEE_ALG_ECDSA_P192: 96 case TEE_ALG_ECDH_P192: 97 if (maxKeySize != 192) 98 return TEE_ERROR_NOT_SUPPORTED; 99 break; 100 101 case TEE_ALG_ECDSA_P224: 102 case TEE_ALG_ECDH_P224: 103 if (maxKeySize != 224) 104 return TEE_ERROR_NOT_SUPPORTED; 105 break; 106 107 case TEE_ALG_ECDSA_P256: 108 case TEE_ALG_ECDH_P256: 109 if (maxKeySize != 256) 110 return TEE_ERROR_NOT_SUPPORTED; 111 break; 112 113 case TEE_ALG_ECDSA_P384: 114 case TEE_ALG_ECDH_P384: 115 if (maxKeySize != 384) 116 return TEE_ERROR_NOT_SUPPORTED; 117 break; 118 119 case TEE_ALG_ECDSA_P521: 120 case TEE_ALG_ECDH_P521: 121 if (maxKeySize != 521) 122 return TEE_ERROR_NOT_SUPPORTED; 123 break; 124 125 default: 126 break; 127 } 128 129 /* Check algorithm mode */ 130 switch (algorithm) { 131 case TEE_ALG_AES_CTS: 132 case TEE_ALG_AES_XTS: 133 buffer_two_blocks = true; 134 /* FALLTHROUGH */ 135 case TEE_ALG_AES_ECB_NOPAD: 136 case TEE_ALG_AES_CBC_NOPAD: 137 case TEE_ALG_AES_CTR: 138 case TEE_ALG_AES_CCM: 139 case TEE_ALG_AES_GCM: 140 case TEE_ALG_DES_ECB_NOPAD: 141 case TEE_ALG_DES_CBC_NOPAD: 142 case TEE_ALG_DES3_ECB_NOPAD: 143 case TEE_ALG_DES3_CBC_NOPAD: 144 if (TEE_ALG_GET_MAIN_ALG(algorithm) == TEE_MAIN_ALGO_AES) 145 block_size = TEE_AES_BLOCK_SIZE; 146 else 147 block_size = TEE_DES_BLOCK_SIZE; 148 149 if (mode == TEE_MODE_ENCRYPT) 150 req_key_usage = TEE_USAGE_ENCRYPT; 151 else if (mode == TEE_MODE_DECRYPT) 152 req_key_usage = TEE_USAGE_DECRYPT; 153 else 154 return TEE_ERROR_NOT_SUPPORTED; 155 break; 156 157 case TEE_ALG_RSASSA_PKCS1_V1_5_MD5: 158 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA1: 159 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA224: 160 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA256: 161 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA384: 162 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA512: 163 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA1: 164 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA224: 165 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA256: 166 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA384: 167 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA512: 168 case TEE_ALG_DSA_SHA1: 169 case TEE_ALG_DSA_SHA224: 170 case TEE_ALG_DSA_SHA256: 171 case TEE_ALG_ECDSA_P192: 172 case TEE_ALG_ECDSA_P224: 173 case TEE_ALG_ECDSA_P256: 174 case TEE_ALG_ECDSA_P384: 175 case TEE_ALG_ECDSA_P521: 176 if (mode == TEE_MODE_SIGN) { 177 with_private_key = true; 178 req_key_usage = TEE_USAGE_SIGN; 179 } else if (mode == TEE_MODE_VERIFY) { 180 req_key_usage = TEE_USAGE_VERIFY; 181 } else { 182 return TEE_ERROR_NOT_SUPPORTED; 183 } 184 break; 185 186 case TEE_ALG_RSAES_PKCS1_V1_5: 187 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA1: 188 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA224: 189 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA256: 190 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA384: 191 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA512: 192 if (mode == TEE_MODE_ENCRYPT) { 193 req_key_usage = TEE_USAGE_ENCRYPT; 194 } else if (mode == TEE_MODE_DECRYPT) { 195 with_private_key = true; 196 req_key_usage = TEE_USAGE_DECRYPT; 197 } else { 198 return TEE_ERROR_NOT_SUPPORTED; 199 } 200 break; 201 202 case TEE_ALG_RSA_NOPAD: 203 if (mode == TEE_MODE_ENCRYPT) { 204 req_key_usage = TEE_USAGE_ENCRYPT | TEE_USAGE_VERIFY; 205 } else if (mode == TEE_MODE_DECRYPT) { 206 with_private_key = true; 207 req_key_usage = TEE_USAGE_DECRYPT | TEE_USAGE_SIGN; 208 } else { 209 return TEE_ERROR_NOT_SUPPORTED; 210 } 211 break; 212 213 case TEE_ALG_DH_DERIVE_SHARED_SECRET: 214 case TEE_ALG_ECDH_P192: 215 case TEE_ALG_ECDH_P224: 216 case TEE_ALG_ECDH_P256: 217 case TEE_ALG_ECDH_P384: 218 case TEE_ALG_ECDH_P521: 219 case TEE_ALG_HKDF_MD5_DERIVE_KEY: 220 case TEE_ALG_HKDF_SHA1_DERIVE_KEY: 221 case TEE_ALG_HKDF_SHA224_DERIVE_KEY: 222 case TEE_ALG_HKDF_SHA256_DERIVE_KEY: 223 case TEE_ALG_HKDF_SHA384_DERIVE_KEY: 224 case TEE_ALG_HKDF_SHA512_DERIVE_KEY: 225 case TEE_ALG_CONCAT_KDF_SHA1_DERIVE_KEY: 226 case TEE_ALG_CONCAT_KDF_SHA224_DERIVE_KEY: 227 case TEE_ALG_CONCAT_KDF_SHA256_DERIVE_KEY: 228 case TEE_ALG_CONCAT_KDF_SHA384_DERIVE_KEY: 229 case TEE_ALG_CONCAT_KDF_SHA512_DERIVE_KEY: 230 case TEE_ALG_PBKDF2_HMAC_SHA1_DERIVE_KEY: 231 if (mode != TEE_MODE_DERIVE) 232 return TEE_ERROR_NOT_SUPPORTED; 233 with_private_key = true; 234 req_key_usage = TEE_USAGE_DERIVE; 235 break; 236 237 case TEE_ALG_MD5: 238 case TEE_ALG_SHA1: 239 case TEE_ALG_SHA224: 240 case TEE_ALG_SHA256: 241 case TEE_ALG_SHA384: 242 case TEE_ALG_SHA512: 243 if (mode != TEE_MODE_DIGEST) 244 return TEE_ERROR_NOT_SUPPORTED; 245 /* v1.1: flags always set for digest operations */ 246 handle_state |= TEE_HANDLE_FLAG_KEY_SET; 247 req_key_usage = 0; 248 break; 249 250 case TEE_ALG_DES_CBC_MAC_NOPAD: 251 case TEE_ALG_AES_CBC_MAC_NOPAD: 252 case TEE_ALG_AES_CBC_MAC_PKCS5: 253 case TEE_ALG_AES_CMAC: 254 case TEE_ALG_DES_CBC_MAC_PKCS5: 255 case TEE_ALG_DES3_CBC_MAC_NOPAD: 256 case TEE_ALG_DES3_CBC_MAC_PKCS5: 257 case TEE_ALG_HMAC_MD5: 258 case TEE_ALG_HMAC_SHA1: 259 case TEE_ALG_HMAC_SHA224: 260 case TEE_ALG_HMAC_SHA256: 261 case TEE_ALG_HMAC_SHA384: 262 case TEE_ALG_HMAC_SHA512: 263 if (mode != TEE_MODE_MAC) 264 return TEE_ERROR_NOT_SUPPORTED; 265 req_key_usage = TEE_USAGE_MAC; 266 break; 267 268 default: 269 return TEE_ERROR_NOT_SUPPORTED; 270 } 271 272 op = TEE_Malloc(sizeof(*op), TEE_MALLOC_FILL_ZERO); 273 if (!op) 274 return TEE_ERROR_OUT_OF_MEMORY; 275 276 op->info.algorithm = algorithm; 277 op->info.operationClass = TEE_ALG_GET_CLASS(algorithm); 278 op->info.mode = mode; 279 op->info.maxKeySize = maxKeySize; 280 op->info.requiredKeyUsage = req_key_usage; 281 op->info.handleState = handle_state; 282 283 if (block_size > 1) { 284 size_t buffer_size = block_size; 285 286 if (buffer_two_blocks) 287 buffer_size *= 2; 288 289 op->buffer = TEE_Malloc(buffer_size, 290 TEE_USER_MEM_HINT_NO_FILL_ZERO); 291 if (op->buffer == NULL) { 292 res = TEE_ERROR_OUT_OF_MEMORY; 293 goto out; 294 } 295 } 296 op->block_size = block_size; 297 op->buffer_two_blocks = buffer_two_blocks; 298 299 if (TEE_ALG_GET_CLASS(algorithm) != TEE_OPERATION_DIGEST) { 300 uint32_t mks = maxKeySize; 301 TEE_ObjectType key_type = TEE_ALG_GET_KEY_TYPE(algorithm, 302 with_private_key); 303 304 /* 305 * If two keys are expected the max key size is the sum of 306 * the size of both keys. 307 */ 308 if (op->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) 309 mks /= 2; 310 311 res = TEE_AllocateTransientObject(key_type, mks, &op->key1); 312 if (res != TEE_SUCCESS) 313 goto out; 314 315 if (op->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) { 316 res = TEE_AllocateTransientObject(key_type, mks, 317 &op->key2); 318 if (res != TEE_SUCCESS) 319 goto out; 320 } 321 } 322 323 res = utee_cryp_state_alloc(algorithm, mode, (unsigned long)op->key1, 324 (unsigned long)op->key2, &op->state); 325 if (res != TEE_SUCCESS) 326 goto out; 327 328 /* 329 * Initialize digest operations 330 * Other multi-stage operations initialized w/ TEE_xxxInit functions 331 * Non-applicable on asymmetric operations 332 */ 333 if (TEE_ALG_GET_CLASS(algorithm) == TEE_OPERATION_DIGEST) { 334 res = utee_hash_init(op->state, NULL, 0); 335 if (res != TEE_SUCCESS) 336 goto out; 337 /* v1.1: flags always set for digest operations */ 338 op->info.handleState |= TEE_HANDLE_FLAG_INITIALIZED; 339 } 340 341 op->operationState = TEE_OPERATION_STATE_INITIAL; 342 343 *operation = op; 344 345 out: 346 if (res != TEE_SUCCESS) { 347 if (res != TEE_ERROR_OUT_OF_MEMORY && 348 res != TEE_ERROR_NOT_SUPPORTED) 349 TEE_Panic(0); 350 if (op) { 351 if (op->state) { 352 TEE_FreeOperation(op); 353 } else { 354 TEE_Free(op->buffer); 355 TEE_FreeTransientObject(op->key1); 356 TEE_FreeTransientObject(op->key2); 357 TEE_Free(op); 358 } 359 } 360 } 361 362 return res; 363 } 364 365 void TEE_FreeOperation(TEE_OperationHandle operation) 366 { 367 TEE_Result res; 368 369 if (operation == TEE_HANDLE_NULL) 370 TEE_Panic(0); 371 372 /* 373 * Note that keys should not be freed here, since they are 374 * claimed by the operation they will be freed by 375 * utee_cryp_state_free(). 376 */ 377 res = utee_cryp_state_free(operation->state); 378 if (res != TEE_SUCCESS) 379 TEE_Panic(0); 380 381 TEE_Free(operation->buffer); 382 TEE_Free(operation); 383 } 384 385 void TEE_GetOperationInfo(TEE_OperationHandle operation, 386 TEE_OperationInfo *operationInfo) 387 { 388 if (operation == TEE_HANDLE_NULL) 389 TEE_Panic(0); 390 391 if (!operationInfo) 392 TEE_Panic(0); 393 394 *operationInfo = operation->info; 395 } 396 397 TEE_Result TEE_GetOperationInfoMultiple(TEE_OperationHandle operation, 398 TEE_OperationInfoMultiple *operationInfoMultiple, 399 uint32_t *operationSize) 400 { 401 TEE_Result res = TEE_SUCCESS; 402 TEE_ObjectInfo key_info1; 403 TEE_ObjectInfo key_info2; 404 uint32_t num_of_keys; 405 size_t n; 406 407 if (operation == TEE_HANDLE_NULL) { 408 res = TEE_ERROR_BAD_PARAMETERS; 409 goto out; 410 } 411 412 if (!operationInfoMultiple) { 413 res = TEE_ERROR_BAD_PARAMETERS; 414 goto out; 415 } 416 417 if (!operationSize) { 418 res = TEE_ERROR_BAD_PARAMETERS; 419 goto out; 420 } 421 422 num_of_keys = (*operationSize-sizeof(TEE_OperationInfoMultiple))/ 423 sizeof(TEE_OperationInfoKey); 424 425 if (num_of_keys > 2) { 426 res = TEE_ERROR_BAD_PARAMETERS; 427 goto out; 428 } 429 430 /* Two keys flag (TEE_ALG_AES_XTS only) */ 431 if ((operation->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) != 432 0 && 433 (num_of_keys != 2)) { 434 res = TEE_ERROR_SHORT_BUFFER; 435 goto out; 436 } 437 438 /* Clear */ 439 for (n = 0; n < num_of_keys; n++) { 440 operationInfoMultiple->keyInformation[n].keySize = 0; 441 operationInfoMultiple->keyInformation[n].requiredKeyUsage = 0; 442 } 443 444 if (num_of_keys == 2) { 445 res = TEE_GetObjectInfo1(operation->key2, &key_info2); 446 /* Key2 is not a valid handle */ 447 if (res != TEE_SUCCESS) 448 goto out; 449 450 operationInfoMultiple->keyInformation[1].keySize = 451 key_info2.keySize; 452 operationInfoMultiple->keyInformation[1].requiredKeyUsage = 453 operation->info.requiredKeyUsage; 454 } 455 456 if (num_of_keys >= 1) { 457 res = TEE_GetObjectInfo1(operation->key1, &key_info1); 458 /* Key1 is not a valid handle */ 459 if (res != TEE_SUCCESS) { 460 if (num_of_keys == 2) { 461 operationInfoMultiple->keyInformation[1]. 462 keySize = 0; 463 operationInfoMultiple->keyInformation[1]. 464 requiredKeyUsage = 0; 465 } 466 goto out; 467 } 468 469 operationInfoMultiple->keyInformation[0].keySize = 470 key_info1.keySize; 471 operationInfoMultiple->keyInformation[0].requiredKeyUsage = 472 operation->info.requiredKeyUsage; 473 } 474 475 /* No key */ 476 operationInfoMultiple->algorithm = operation->info.algorithm; 477 operationInfoMultiple->operationClass = operation->info.operationClass; 478 operationInfoMultiple->mode = operation->info.mode; 479 operationInfoMultiple->digestLength = operation->info.digestLength; 480 operationInfoMultiple->maxKeySize = operation->info.maxKeySize; 481 operationInfoMultiple->handleState = operation->info.handleState; 482 operationInfoMultiple->operationState = operation->operationState; 483 operationInfoMultiple->numberOfKeys = num_of_keys; 484 485 out: 486 if (res != TEE_SUCCESS && 487 res != TEE_ERROR_SHORT_BUFFER) 488 TEE_Panic(0); 489 490 return res; 491 } 492 493 void TEE_ResetOperation(TEE_OperationHandle operation) 494 { 495 TEE_Result res; 496 497 if (operation == TEE_HANDLE_NULL) 498 TEE_Panic(0); 499 500 if (!(operation->info.handleState & TEE_HANDLE_FLAG_KEY_SET)) 501 TEE_Panic(0); 502 503 operation->operationState = TEE_OPERATION_STATE_INITIAL; 504 505 if (operation->info.operationClass == TEE_OPERATION_DIGEST) { 506 res = utee_hash_init(operation->state, NULL, 0); 507 if (res != TEE_SUCCESS) 508 TEE_Panic(res); 509 operation->info.handleState |= TEE_HANDLE_FLAG_INITIALIZED; 510 } else { 511 operation->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 512 } 513 } 514 515 TEE_Result TEE_SetOperationKey(TEE_OperationHandle operation, 516 TEE_ObjectHandle key) 517 { 518 TEE_Result res; 519 uint32_t key_size = 0; 520 TEE_ObjectInfo key_info; 521 522 if (operation == TEE_HANDLE_NULL) { 523 res = TEE_ERROR_BAD_PARAMETERS; 524 goto out; 525 } 526 527 if (operation->operationState != TEE_OPERATION_STATE_INITIAL) { 528 res = TEE_ERROR_BAD_PARAMETERS; 529 goto out; 530 } 531 532 if (key == TEE_HANDLE_NULL) { 533 /* Operation key cleared */ 534 TEE_ResetTransientObject(operation->key1); 535 res = TEE_ERROR_BAD_PARAMETERS; 536 goto out; 537 } 538 539 /* No key for digest operation */ 540 if (operation->info.operationClass == TEE_OPERATION_DIGEST) { 541 res = TEE_ERROR_BAD_PARAMETERS; 542 goto out; 543 } 544 545 /* Two keys flag not expected (TEE_ALG_AES_XTS excluded) */ 546 if ((operation->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) != 547 0) { 548 res = TEE_ERROR_BAD_PARAMETERS; 549 goto out; 550 } 551 552 res = TEE_GetObjectInfo1(key, &key_info); 553 /* Key is not a valid handle */ 554 if (res != TEE_SUCCESS) 555 goto out; 556 557 /* Supplied key has to meet required usage */ 558 if ((key_info.objectUsage & operation->info.requiredKeyUsage) != 559 operation->info.requiredKeyUsage) { 560 res = TEE_ERROR_BAD_PARAMETERS; 561 goto out; 562 } 563 564 if (operation->info.maxKeySize < key_info.keySize) { 565 res = TEE_ERROR_BAD_PARAMETERS; 566 goto out; 567 } 568 569 key_size = key_info.keySize; 570 571 TEE_ResetTransientObject(operation->key1); 572 operation->info.handleState &= ~TEE_HANDLE_FLAG_KEY_SET; 573 574 res = TEE_CopyObjectAttributes1(operation->key1, key); 575 if (res != TEE_SUCCESS) 576 goto out; 577 578 operation->info.handleState |= TEE_HANDLE_FLAG_KEY_SET; 579 580 operation->info.keySize = key_size; 581 582 out: 583 if (res != TEE_SUCCESS && 584 res != TEE_ERROR_CORRUPT_OBJECT && 585 res != TEE_ERROR_STORAGE_NOT_AVAILABLE) 586 TEE_Panic(0); 587 588 return res; 589 } 590 591 TEE_Result TEE_SetOperationKey2(TEE_OperationHandle operation, 592 TEE_ObjectHandle key1, TEE_ObjectHandle key2) 593 { 594 TEE_Result res; 595 uint32_t key_size = 0; 596 TEE_ObjectInfo key_info1; 597 TEE_ObjectInfo key_info2; 598 599 if (operation == TEE_HANDLE_NULL) { 600 res = TEE_ERROR_BAD_PARAMETERS; 601 goto out; 602 } 603 604 if (operation->operationState != TEE_OPERATION_STATE_INITIAL) { 605 res = TEE_ERROR_BAD_PARAMETERS; 606 goto out; 607 } 608 609 /* 610 * Key1/Key2 and/or are not initialized and 611 * Either both keys are NULL or both are not NULL 612 */ 613 if (key1 == TEE_HANDLE_NULL || key2 == TEE_HANDLE_NULL) { 614 /* Clear operation key1 (if needed) */ 615 if (key1 == TEE_HANDLE_NULL) 616 TEE_ResetTransientObject(operation->key1); 617 /* Clear operation key2 (if needed) */ 618 if (key2 == TEE_HANDLE_NULL) 619 TEE_ResetTransientObject(operation->key2); 620 res = TEE_ERROR_BAD_PARAMETERS; 621 goto out; 622 } 623 624 /* No key for digest operation */ 625 if (operation->info.operationClass == TEE_OPERATION_DIGEST) { 626 res = TEE_ERROR_BAD_PARAMETERS; 627 goto out; 628 } 629 630 /* Two keys flag expected (TEE_ALG_AES_XTS only) */ 631 if ((operation->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) == 632 0) { 633 res = TEE_ERROR_BAD_PARAMETERS; 634 goto out; 635 } 636 637 res = TEE_GetObjectInfo1(key1, &key_info1); 638 /* Key1 is not a valid handle */ 639 if (res != TEE_SUCCESS) 640 goto out; 641 642 /* Supplied key has to meet required usage */ 643 if ((key_info1.objectUsage & operation->info. 644 requiredKeyUsage) != operation->info.requiredKeyUsage) { 645 res = TEE_ERROR_BAD_PARAMETERS; 646 goto out; 647 } 648 649 res = TEE_GetObjectInfo1(key2, &key_info2); 650 /* Key2 is not a valid handle */ 651 if (res != TEE_SUCCESS) { 652 if (res == TEE_ERROR_CORRUPT_OBJECT) 653 res = TEE_ERROR_CORRUPT_OBJECT_2; 654 goto out; 655 } 656 657 /* Supplied key has to meet required usage */ 658 if ((key_info2.objectUsage & operation->info. 659 requiredKeyUsage) != operation->info.requiredKeyUsage) { 660 res = TEE_ERROR_BAD_PARAMETERS; 661 goto out; 662 } 663 664 /* 665 * AES-XTS (the only multi key algorithm supported, requires the 666 * keys to be of equal size. 667 */ 668 if (operation->info.algorithm == TEE_ALG_AES_XTS && 669 key_info1.keySize != key_info2.keySize) { 670 res = TEE_ERROR_BAD_PARAMETERS; 671 goto out; 672 673 } 674 675 if (operation->info.maxKeySize < key_info1.keySize) { 676 res = TEE_ERROR_BAD_PARAMETERS; 677 goto out; 678 } 679 680 /* 681 * Odd that only the size of one key should be reported while 682 * size of two key are used when allocating the operation. 683 */ 684 key_size = key_info1.keySize; 685 686 TEE_ResetTransientObject(operation->key1); 687 TEE_ResetTransientObject(operation->key2); 688 operation->info.handleState &= ~TEE_HANDLE_FLAG_KEY_SET; 689 690 res = TEE_CopyObjectAttributes1(operation->key1, key1); 691 if (res != TEE_SUCCESS) 692 goto out; 693 694 res = TEE_CopyObjectAttributes1(operation->key2, key2); 695 if (res != TEE_SUCCESS) { 696 if (res == TEE_ERROR_CORRUPT_OBJECT) 697 res = TEE_ERROR_CORRUPT_OBJECT_2; 698 goto out; 699 } 700 701 operation->info.handleState |= TEE_HANDLE_FLAG_KEY_SET; 702 703 operation->info.keySize = key_size; 704 705 out: 706 if (res != TEE_SUCCESS && 707 res != TEE_ERROR_CORRUPT_OBJECT && 708 res != TEE_ERROR_CORRUPT_OBJECT_2 && 709 res != TEE_ERROR_STORAGE_NOT_AVAILABLE && 710 res != TEE_ERROR_STORAGE_NOT_AVAILABLE_2) 711 TEE_Panic(0); 712 713 return res; 714 } 715 716 void TEE_CopyOperation(TEE_OperationHandle dst_op, TEE_OperationHandle src_op) 717 { 718 TEE_Result res; 719 720 if (dst_op == TEE_HANDLE_NULL || src_op == TEE_HANDLE_NULL) 721 TEE_Panic(0); 722 if (dst_op->info.algorithm != src_op->info.algorithm) 723 TEE_Panic(0); 724 if (src_op->info.operationClass != TEE_OPERATION_DIGEST) { 725 TEE_ObjectHandle key1 = TEE_HANDLE_NULL; 726 TEE_ObjectHandle key2 = TEE_HANDLE_NULL; 727 728 if (src_op->info.handleState & TEE_HANDLE_FLAG_KEY_SET) { 729 key1 = src_op->key1; 730 key2 = src_op->key2; 731 } 732 733 if ((src_op->info.handleState & 734 TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) == 0) { 735 TEE_SetOperationKey(dst_op, key1); 736 } else { 737 TEE_SetOperationKey2(dst_op, key1, key2); 738 } 739 } 740 dst_op->info.handleState = src_op->info.handleState; 741 dst_op->info.keySize = src_op->info.keySize; 742 dst_op->operationState = src_op->operationState; 743 744 if (dst_op->buffer_two_blocks != src_op->buffer_two_blocks || 745 dst_op->block_size != src_op->block_size) 746 TEE_Panic(0); 747 748 if (dst_op->buffer != NULL) { 749 if (src_op->buffer == NULL) 750 TEE_Panic(0); 751 752 memcpy(dst_op->buffer, src_op->buffer, src_op->buffer_offs); 753 dst_op->buffer_offs = src_op->buffer_offs; 754 } else if (src_op->buffer != NULL) { 755 TEE_Panic(0); 756 } 757 758 res = utee_cryp_state_copy(dst_op->state, src_op->state); 759 if (res != TEE_SUCCESS) 760 TEE_Panic(res); 761 } 762 763 /* Cryptographic Operations API - Message Digest Functions */ 764 765 static void init_hash_operation(TEE_OperationHandle operation, void *IV, 766 uint32_t IVLen) 767 { 768 TEE_Result res; 769 770 /* 771 * Note : IV and IVLen are never used in current implementation 772 * This is why coherent values of IV and IVLen are not checked 773 */ 774 res = utee_hash_init(operation->state, IV, IVLen); 775 if (res != TEE_SUCCESS) 776 TEE_Panic(res); 777 operation->buffer_offs = 0; 778 operation->info.handleState |= TEE_HANDLE_FLAG_INITIALIZED; 779 } 780 781 void TEE_DigestUpdate(TEE_OperationHandle operation, 782 void *chunk, uint32_t chunkSize) 783 { 784 TEE_Result res = TEE_ERROR_GENERIC; 785 786 if (operation == TEE_HANDLE_NULL || 787 operation->info.operationClass != TEE_OPERATION_DIGEST) 788 TEE_Panic(0); 789 790 operation->operationState = TEE_OPERATION_STATE_ACTIVE; 791 792 res = utee_hash_update(operation->state, chunk, chunkSize); 793 if (res != TEE_SUCCESS) 794 TEE_Panic(res); 795 } 796 797 TEE_Result TEE_DigestDoFinal(TEE_OperationHandle operation, void *chunk, 798 uint32_t chunkLen, void *hash, uint32_t *hashLen) 799 { 800 TEE_Result res; 801 uint64_t hl; 802 803 if ((operation == TEE_HANDLE_NULL) || 804 (!chunk && chunkLen) || 805 !hash || 806 !hashLen || 807 (operation->info.operationClass != TEE_OPERATION_DIGEST)) { 808 res = TEE_ERROR_BAD_PARAMETERS; 809 goto out; 810 } 811 812 hl = *hashLen; 813 res = utee_hash_final(operation->state, chunk, chunkLen, hash, &hl); 814 *hashLen = hl; 815 if (res != TEE_SUCCESS) 816 goto out; 817 818 /* Reset operation state */ 819 init_hash_operation(operation, NULL, 0); 820 821 operation->operationState = TEE_OPERATION_STATE_INITIAL; 822 823 out: 824 if (res != TEE_SUCCESS && 825 res != TEE_ERROR_SHORT_BUFFER) 826 TEE_Panic(0); 827 828 return res; 829 } 830 831 /* Cryptographic Operations API - Symmetric Cipher Functions */ 832 833 void TEE_CipherInit(TEE_OperationHandle operation, void *IV, uint32_t IVLen) 834 { 835 TEE_Result res; 836 837 if (operation == TEE_HANDLE_NULL) 838 TEE_Panic(0); 839 840 if (operation->info.operationClass != TEE_OPERATION_CIPHER) 841 TEE_Panic(0); 842 843 if (!(operation->info.handleState & TEE_HANDLE_FLAG_KEY_SET) || 844 !(operation->key1)) 845 TEE_Panic(0); 846 847 if (operation->operationState != TEE_OPERATION_STATE_INITIAL) 848 TEE_ResetOperation(operation); 849 850 operation->operationState = TEE_OPERATION_STATE_ACTIVE; 851 852 res = utee_cipher_init(operation->state, IV, IVLen); 853 if (res != TEE_SUCCESS) 854 TEE_Panic(res); 855 856 operation->buffer_offs = 0; 857 operation->info.handleState |= TEE_HANDLE_FLAG_INITIALIZED; 858 } 859 860 static TEE_Result tee_buffer_update( 861 TEE_OperationHandle op, 862 TEE_Result(*update_func)(unsigned long state, const void *src, 863 size_t slen, void *dst, uint64_t *dlen), 864 const void *src_data, size_t src_len, 865 void *dest_data, uint64_t *dest_len) 866 { 867 TEE_Result res; 868 const uint8_t *src = src_data; 869 size_t slen = src_len; 870 uint8_t *dst = dest_data; 871 size_t dlen = *dest_len; 872 size_t acc_dlen = 0; 873 uint64_t tmp_dlen; 874 size_t l; 875 size_t buffer_size; 876 size_t buffer_left; 877 878 if (op->buffer_two_blocks) { 879 buffer_size = op->block_size * 2; 880 buffer_left = 1; 881 } else { 882 buffer_size = op->block_size; 883 buffer_left = 0; 884 } 885 886 if (op->buffer_offs > 0) { 887 /* Fill up complete block */ 888 if (op->buffer_offs < op->block_size) 889 l = MIN(slen, op->block_size - op->buffer_offs); 890 else 891 l = MIN(slen, buffer_size - op->buffer_offs); 892 memcpy(op->buffer + op->buffer_offs, src, l); 893 op->buffer_offs += l; 894 src += l; 895 slen -= l; 896 if ((op->buffer_offs % op->block_size) != 0) 897 goto out; /* Nothing left to do */ 898 } 899 900 /* If we can feed from buffer */ 901 if ((op->buffer_offs > 0) && 902 ((op->buffer_offs + slen) >= (buffer_size + buffer_left))) { 903 l = ROUNDUP(op->buffer_offs + slen - buffer_size, 904 op->block_size); 905 l = MIN(op->buffer_offs, l); 906 tmp_dlen = dlen; 907 res = update_func(op->state, op->buffer, l, dst, &tmp_dlen); 908 if (res != TEE_SUCCESS) 909 TEE_Panic(res); 910 dst += tmp_dlen; 911 dlen -= tmp_dlen; 912 acc_dlen += tmp_dlen; 913 op->buffer_offs -= l; 914 if (op->buffer_offs > 0) { 915 /* 916 * Slen is small enough to be contained in rest buffer. 917 */ 918 memcpy(op->buffer, op->buffer + l, buffer_size - l); 919 memcpy(op->buffer + op->buffer_offs, src, slen); 920 op->buffer_offs += slen; 921 goto out; /* Nothing left to do */ 922 } 923 } 924 925 if (slen >= (buffer_size + buffer_left)) { 926 /* Buffer is empty, feed as much as possible from src */ 927 l = ROUNDUP(slen - buffer_size + 1, op->block_size); 928 929 tmp_dlen = dlen; 930 res = update_func(op->state, src, l, dst, &tmp_dlen); 931 if (res != TEE_SUCCESS) 932 TEE_Panic(res); 933 src += l; 934 slen -= l; 935 dst += tmp_dlen; 936 dlen -= tmp_dlen; 937 acc_dlen += tmp_dlen; 938 } 939 940 /* Slen is small enough to be contained in buffer. */ 941 memcpy(op->buffer + op->buffer_offs, src, slen); 942 op->buffer_offs += slen; 943 944 out: 945 *dest_len = acc_dlen; 946 return TEE_SUCCESS; 947 } 948 949 TEE_Result TEE_CipherUpdate(TEE_OperationHandle operation, void *srcData, 950 uint32_t srcLen, void *destData, uint32_t *destLen) 951 { 952 TEE_Result res; 953 size_t req_dlen; 954 uint64_t dl; 955 956 if (operation == TEE_HANDLE_NULL || 957 (srcData == NULL && srcLen != 0) || 958 destLen == NULL || 959 (destData == NULL && *destLen != 0)) { 960 res = TEE_ERROR_BAD_PARAMETERS; 961 goto out; 962 } 963 964 if (operation->info.operationClass != TEE_OPERATION_CIPHER) { 965 res = TEE_ERROR_BAD_PARAMETERS; 966 goto out; 967 } 968 969 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 970 res = TEE_ERROR_BAD_PARAMETERS; 971 goto out; 972 } 973 974 if (operation->operationState != TEE_OPERATION_STATE_ACTIVE) { 975 res = TEE_ERROR_BAD_PARAMETERS; 976 goto out; 977 } 978 979 if (!srcData && !srcLen) { 980 res = TEE_SUCCESS; 981 goto out; 982 } 983 984 /* Calculate required dlen */ 985 req_dlen = ((operation->buffer_offs + srcLen) / operation->block_size) * 986 operation->block_size; 987 if (operation->buffer_two_blocks) { 988 if (req_dlen > operation->block_size * 2) 989 req_dlen -= operation->block_size * 2; 990 else 991 req_dlen = 0; 992 } 993 /* 994 * Check that required destLen is big enough before starting to feed 995 * data to the algorithm. Errors during feeding of data are fatal as we 996 * can't restore sync with this API. 997 */ 998 if (*destLen < req_dlen) { 999 *destLen = req_dlen; 1000 res = TEE_ERROR_SHORT_BUFFER; 1001 goto out; 1002 } 1003 1004 dl = *destLen; 1005 res = tee_buffer_update(operation, utee_cipher_update, srcData, srcLen, 1006 destData, &dl); 1007 *destLen = dl; 1008 1009 out: 1010 if (res != TEE_SUCCESS && 1011 res != TEE_ERROR_SHORT_BUFFER) 1012 TEE_Panic(0); 1013 1014 return res; 1015 } 1016 1017 TEE_Result TEE_CipherDoFinal(TEE_OperationHandle operation, 1018 void *srcData, uint32_t srcLen, void *destData, 1019 uint32_t *destLen) 1020 { 1021 TEE_Result res; 1022 uint8_t *dst = destData; 1023 size_t acc_dlen = 0; 1024 uint64_t tmp_dlen; 1025 size_t req_dlen; 1026 1027 if (operation == TEE_HANDLE_NULL || 1028 (srcData == NULL && srcLen != 0) || 1029 destLen == NULL || 1030 (destData == NULL && *destLen != 0)) { 1031 res = TEE_ERROR_BAD_PARAMETERS; 1032 goto out; 1033 } 1034 1035 if (operation->info.operationClass != TEE_OPERATION_CIPHER) { 1036 res = TEE_ERROR_BAD_PARAMETERS; 1037 goto out; 1038 } 1039 1040 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 1041 res = TEE_ERROR_BAD_PARAMETERS; 1042 goto out; 1043 } 1044 1045 if (operation->operationState != TEE_OPERATION_STATE_ACTIVE) { 1046 res = TEE_ERROR_BAD_PARAMETERS; 1047 goto out; 1048 } 1049 1050 /* 1051 * Check that the final block doesn't require padding for those 1052 * algorithms that requires client to supply padding. 1053 */ 1054 if (operation->info.algorithm == TEE_ALG_AES_ECB_NOPAD || 1055 operation->info.algorithm == TEE_ALG_AES_CBC_NOPAD || 1056 operation->info.algorithm == TEE_ALG_DES_ECB_NOPAD || 1057 operation->info.algorithm == TEE_ALG_DES_CBC_NOPAD || 1058 operation->info.algorithm == TEE_ALG_DES3_ECB_NOPAD || 1059 operation->info.algorithm == TEE_ALG_DES3_CBC_NOPAD) { 1060 if (((operation->buffer_offs + srcLen) % operation->block_size) 1061 != 0) { 1062 res = TEE_ERROR_BAD_PARAMETERS; 1063 goto out; 1064 } 1065 } 1066 1067 if (!srcData && !srcLen) { 1068 res = TEE_SUCCESS; 1069 goto out; 1070 } 1071 1072 /* 1073 * Check that required destLen is big enough before starting to feed 1074 * data to the algorithm. Errors during feeding of data are fatal as we 1075 * can't restore sync with this API. 1076 */ 1077 req_dlen = operation->buffer_offs + srcLen; 1078 if (*destLen < req_dlen) { 1079 *destLen = req_dlen; 1080 res = TEE_ERROR_SHORT_BUFFER; 1081 goto out; 1082 } 1083 1084 tmp_dlen = *destLen - acc_dlen; 1085 res = tee_buffer_update(operation, utee_cipher_update, srcData, srcLen, 1086 dst, &tmp_dlen); 1087 if (res != TEE_SUCCESS) 1088 goto out; 1089 1090 dst += tmp_dlen; 1091 acc_dlen += tmp_dlen; 1092 1093 tmp_dlen = *destLen - acc_dlen; 1094 res = utee_cipher_final(operation->state, operation->buffer, 1095 operation->buffer_offs, dst, &tmp_dlen); 1096 if (res != TEE_SUCCESS) 1097 goto out; 1098 1099 acc_dlen += tmp_dlen; 1100 *destLen = acc_dlen; 1101 1102 operation->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 1103 1104 operation->operationState = TEE_OPERATION_STATE_INITIAL; 1105 1106 out: 1107 if (res != TEE_SUCCESS && 1108 res != TEE_ERROR_SHORT_BUFFER) 1109 TEE_Panic(0); 1110 1111 return res; 1112 } 1113 1114 /* Cryptographic Operations API - MAC Functions */ 1115 1116 void TEE_MACInit(TEE_OperationHandle operation, void *IV, uint32_t IVLen) 1117 { 1118 if (operation == TEE_HANDLE_NULL) 1119 TEE_Panic(0); 1120 1121 if (operation->info.operationClass != TEE_OPERATION_MAC) 1122 TEE_Panic(0); 1123 1124 if (!(operation->info.handleState & TEE_HANDLE_FLAG_KEY_SET) || 1125 !(operation->key1)) 1126 TEE_Panic(0); 1127 1128 if (operation->operationState != TEE_OPERATION_STATE_INITIAL) 1129 TEE_ResetOperation(operation); 1130 1131 operation->operationState = TEE_OPERATION_STATE_ACTIVE; 1132 1133 init_hash_operation(operation, IV, IVLen); 1134 } 1135 1136 void TEE_MACUpdate(TEE_OperationHandle operation, void *chunk, 1137 uint32_t chunkSize) 1138 { 1139 TEE_Result res; 1140 1141 if (operation == TEE_HANDLE_NULL || (chunk == NULL && chunkSize != 0)) 1142 TEE_Panic(0); 1143 1144 if (operation->info.operationClass != TEE_OPERATION_MAC) 1145 TEE_Panic(0); 1146 1147 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 1148 TEE_Panic(0); 1149 1150 if (operation->operationState != TEE_OPERATION_STATE_ACTIVE) 1151 TEE_Panic(0); 1152 1153 res = utee_hash_update(operation->state, chunk, chunkSize); 1154 if (res != TEE_SUCCESS) 1155 TEE_Panic(res); 1156 } 1157 1158 TEE_Result TEE_MACComputeFinal(TEE_OperationHandle operation, 1159 void *message, uint32_t messageLen, 1160 void *mac, uint32_t *macLen) 1161 { 1162 TEE_Result res; 1163 uint64_t ml; 1164 1165 if (operation == TEE_HANDLE_NULL || 1166 (message == NULL && messageLen != 0) || 1167 mac == NULL || 1168 macLen == NULL) { 1169 res = TEE_ERROR_BAD_PARAMETERS; 1170 goto out; 1171 } 1172 1173 if (operation->info.operationClass != TEE_OPERATION_MAC) { 1174 res = TEE_ERROR_BAD_PARAMETERS; 1175 goto out; 1176 } 1177 1178 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 1179 res = TEE_ERROR_BAD_PARAMETERS; 1180 goto out; 1181 } 1182 1183 if (operation->operationState != TEE_OPERATION_STATE_ACTIVE) { 1184 res = TEE_ERROR_BAD_PARAMETERS; 1185 goto out; 1186 } 1187 1188 ml = *macLen; 1189 res = utee_hash_final(operation->state, message, messageLen, mac, &ml); 1190 *macLen = ml; 1191 if (res != TEE_SUCCESS) 1192 goto out; 1193 1194 operation->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 1195 1196 operation->operationState = TEE_OPERATION_STATE_INITIAL; 1197 1198 out: 1199 if (res != TEE_SUCCESS && 1200 res != TEE_ERROR_SHORT_BUFFER) 1201 TEE_Panic(res); 1202 1203 return res; 1204 } 1205 1206 TEE_Result TEE_MACCompareFinal(TEE_OperationHandle operation, 1207 void *message, uint32_t messageLen, 1208 void *mac, uint32_t macLen) 1209 { 1210 TEE_Result res; 1211 uint8_t computed_mac[TEE_MAX_HASH_SIZE]; 1212 uint32_t computed_mac_size = TEE_MAX_HASH_SIZE; 1213 1214 if (operation->info.operationClass != TEE_OPERATION_MAC) { 1215 res = TEE_ERROR_BAD_PARAMETERS; 1216 goto out; 1217 } 1218 1219 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 1220 res = TEE_ERROR_BAD_PARAMETERS; 1221 goto out; 1222 } 1223 1224 if (operation->operationState != TEE_OPERATION_STATE_ACTIVE) { 1225 res = TEE_ERROR_BAD_PARAMETERS; 1226 goto out; 1227 } 1228 1229 res = TEE_MACComputeFinal(operation, message, messageLen, computed_mac, 1230 &computed_mac_size); 1231 if (res != TEE_SUCCESS) 1232 goto out; 1233 1234 if (computed_mac_size != macLen) { 1235 res = TEE_ERROR_MAC_INVALID; 1236 goto out; 1237 } 1238 1239 if (buf_compare_ct(mac, computed_mac, computed_mac_size) != 0) { 1240 res = TEE_ERROR_MAC_INVALID; 1241 goto out; 1242 } 1243 1244 operation->operationState = TEE_OPERATION_STATE_INITIAL; 1245 1246 out: 1247 if (res != TEE_SUCCESS && 1248 res != TEE_ERROR_MAC_INVALID) 1249 TEE_Panic(res); 1250 1251 return res; 1252 } 1253 1254 /* Cryptographic Operations API - Authenticated Encryption Functions */ 1255 1256 TEE_Result TEE_AEInit(TEE_OperationHandle operation, void *nonce, 1257 uint32_t nonceLen, uint32_t tagLen, uint32_t AADLen, 1258 uint32_t payloadLen) 1259 { 1260 TEE_Result res; 1261 1262 if (operation == TEE_HANDLE_NULL || nonce == NULL) { 1263 res = TEE_ERROR_BAD_PARAMETERS; 1264 goto out; 1265 } 1266 1267 if (operation->info.operationClass != TEE_OPERATION_AE) { 1268 res = TEE_ERROR_BAD_PARAMETERS; 1269 goto out; 1270 } 1271 1272 if (operation->operationState != TEE_OPERATION_STATE_INITIAL) { 1273 res = TEE_ERROR_BAD_PARAMETERS; 1274 goto out; 1275 } 1276 1277 /* 1278 * AES-CCM tag len is specified by AES-CCM spec and handled in TEE Core 1279 * in the implementation. But AES-GCM spec doesn't specify the tag len 1280 * according to the same principle so we have to check here instead to 1281 * be GP compliant. 1282 */ 1283 if (operation->info.algorithm == TEE_ALG_AES_GCM) { 1284 /* 1285 * From GP spec: For AES-GCM, can be 128, 120, 112, 104, or 96 1286 */ 1287 if (tagLen < 96 || tagLen > 128 || (tagLen % 8 != 0)) { 1288 res = TEE_ERROR_NOT_SUPPORTED; 1289 goto out; 1290 } 1291 } 1292 1293 res = utee_authenc_init(operation->state, nonce, nonceLen, 1294 tagLen / 8, AADLen, payloadLen); 1295 if (res != TEE_SUCCESS) 1296 goto out; 1297 1298 operation->ae_tag_len = tagLen / 8; 1299 operation->info.handleState |= TEE_HANDLE_FLAG_INITIALIZED; 1300 1301 out: 1302 if (res != TEE_SUCCESS && 1303 res != TEE_ERROR_NOT_SUPPORTED) 1304 TEE_Panic(res); 1305 1306 return res; 1307 } 1308 1309 void TEE_AEUpdateAAD(TEE_OperationHandle operation, void *AADdata, 1310 uint32_t AADdataLen) 1311 { 1312 TEE_Result res; 1313 1314 if (operation == TEE_HANDLE_NULL || 1315 (AADdata == NULL && AADdataLen != 0)) 1316 TEE_Panic(0); 1317 1318 if (operation->info.operationClass != TEE_OPERATION_AE) 1319 TEE_Panic(0); 1320 1321 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 1322 TEE_Panic(0); 1323 1324 res = utee_authenc_update_aad(operation->state, AADdata, AADdataLen); 1325 1326 operation->operationState = TEE_OPERATION_STATE_ACTIVE; 1327 1328 if (res != TEE_SUCCESS) 1329 TEE_Panic(res); 1330 } 1331 1332 TEE_Result TEE_AEUpdate(TEE_OperationHandle operation, void *srcData, 1333 uint32_t srcLen, void *destData, uint32_t *destLen) 1334 { 1335 TEE_Result res; 1336 size_t req_dlen; 1337 uint64_t dl; 1338 1339 if (operation == TEE_HANDLE_NULL || 1340 (srcData == NULL && srcLen != 0) || 1341 destLen == NULL || 1342 (destData == NULL && *destLen != 0)) { 1343 res = TEE_ERROR_BAD_PARAMETERS; 1344 goto out; 1345 } 1346 1347 if (operation->info.operationClass != TEE_OPERATION_AE) { 1348 res = TEE_ERROR_BAD_PARAMETERS; 1349 goto out; 1350 } 1351 1352 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 1353 res = TEE_ERROR_BAD_PARAMETERS; 1354 goto out; 1355 } 1356 1357 if (!srcData && !srcLen) { 1358 res = TEE_SUCCESS; 1359 goto out; 1360 } 1361 1362 /* 1363 * Check that required destLen is big enough before starting to feed 1364 * data to the algorithm. Errors during feeding of data are fatal as we 1365 * can't restore sync with this API. 1366 */ 1367 req_dlen = ROUNDDOWN(operation->buffer_offs + srcLen, 1368 operation->block_size); 1369 if (*destLen < req_dlen) { 1370 *destLen = req_dlen; 1371 res = TEE_ERROR_SHORT_BUFFER; 1372 goto out; 1373 } 1374 1375 dl = *destLen; 1376 res = tee_buffer_update(operation, utee_authenc_update_payload, srcData, 1377 srcLen, destData, &dl); 1378 *destLen = dl; 1379 1380 operation->operationState = TEE_OPERATION_STATE_ACTIVE; 1381 1382 out: 1383 if (res != TEE_SUCCESS && 1384 res != TEE_ERROR_SHORT_BUFFER) 1385 TEE_Panic(res); 1386 1387 return res; 1388 } 1389 1390 TEE_Result TEE_AEEncryptFinal(TEE_OperationHandle operation, 1391 void *srcData, uint32_t srcLen, 1392 void *destData, uint32_t *destLen, void *tag, 1393 uint32_t *tagLen) 1394 { 1395 TEE_Result res; 1396 uint8_t *dst = destData; 1397 size_t acc_dlen = 0; 1398 uint64_t tmp_dlen; 1399 size_t req_dlen; 1400 uint64_t tl; 1401 1402 if (operation == TEE_HANDLE_NULL || 1403 (srcData == NULL && srcLen != 0) || 1404 destLen == NULL || 1405 (destData == NULL && *destLen != 0) || 1406 tag == NULL || tagLen == NULL) { 1407 res = TEE_ERROR_BAD_PARAMETERS; 1408 goto out; 1409 } 1410 1411 if (operation->info.operationClass != TEE_OPERATION_AE) { 1412 res = TEE_ERROR_BAD_PARAMETERS; 1413 goto out; 1414 } 1415 1416 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 1417 res = TEE_ERROR_BAD_PARAMETERS; 1418 goto out; 1419 } 1420 1421 if (!srcData && !srcLen) { 1422 res = TEE_SUCCESS; 1423 goto out; 1424 } 1425 1426 /* 1427 * Check that required destLen is big enough before starting to feed 1428 * data to the algorithm. Errors during feeding of data are fatal as we 1429 * can't restore sync with this API. 1430 */ 1431 req_dlen = operation->buffer_offs + srcLen; 1432 if (*destLen < req_dlen) { 1433 *destLen = req_dlen; 1434 res = TEE_ERROR_SHORT_BUFFER; 1435 goto out; 1436 } 1437 1438 /* 1439 * Need to check this before update_payload since sync would be lost if 1440 * we return short buffer after that. 1441 */ 1442 if (*tagLen < operation->ae_tag_len) { 1443 *tagLen = operation->ae_tag_len; 1444 res = TEE_ERROR_SHORT_BUFFER; 1445 goto out; 1446 } 1447 1448 tmp_dlen = *destLen - acc_dlen; 1449 res = tee_buffer_update(operation, utee_authenc_update_payload, srcData, 1450 srcLen, dst, &tmp_dlen); 1451 if (res != TEE_SUCCESS) 1452 goto out; 1453 1454 dst += tmp_dlen; 1455 acc_dlen += tmp_dlen; 1456 1457 tmp_dlen = *destLen - acc_dlen; 1458 tl = *tagLen; 1459 res = utee_authenc_enc_final(operation->state, operation->buffer, 1460 operation->buffer_offs, dst, &tmp_dlen, 1461 tag, &tl); 1462 *tagLen = tl; 1463 if (res != TEE_SUCCESS) 1464 goto out; 1465 1466 acc_dlen += tmp_dlen; 1467 *destLen = acc_dlen; 1468 1469 operation->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 1470 1471 operation->operationState = TEE_OPERATION_STATE_INITIAL; 1472 1473 out: 1474 if (res != TEE_SUCCESS && 1475 res != TEE_ERROR_SHORT_BUFFER) 1476 TEE_Panic(res); 1477 1478 return res; 1479 } 1480 1481 TEE_Result TEE_AEDecryptFinal(TEE_OperationHandle operation, 1482 void *srcData, uint32_t srcLen, 1483 void *destData, uint32_t *destLen, void *tag, 1484 uint32_t tagLen) 1485 { 1486 TEE_Result res; 1487 uint8_t *dst = destData; 1488 size_t acc_dlen = 0; 1489 uint64_t tmp_dlen; 1490 size_t req_dlen; 1491 1492 if (operation == TEE_HANDLE_NULL || 1493 (srcData == NULL && srcLen != 0) || 1494 destLen == NULL || 1495 (destData == NULL && *destLen != 0) || 1496 (tag == NULL && tagLen != 0)) { 1497 res = TEE_ERROR_BAD_PARAMETERS; 1498 goto out; 1499 } 1500 1501 if (operation->info.operationClass != TEE_OPERATION_AE) { 1502 res = TEE_ERROR_BAD_PARAMETERS; 1503 goto out; 1504 } 1505 1506 if ((operation->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 1507 res = TEE_ERROR_BAD_PARAMETERS; 1508 goto out; 1509 } 1510 1511 if (!srcData && !srcLen) { 1512 res = TEE_SUCCESS; 1513 goto out; 1514 } 1515 1516 /* 1517 * Check that required destLen is big enough before starting to feed 1518 * data to the algorithm. Errors during feeding of data are fatal as we 1519 * can't restore sync with this API. 1520 */ 1521 req_dlen = operation->buffer_offs + srcLen; 1522 if (*destLen < req_dlen) { 1523 *destLen = req_dlen; 1524 res = TEE_ERROR_SHORT_BUFFER; 1525 goto out; 1526 } 1527 1528 tmp_dlen = *destLen - acc_dlen; 1529 res = tee_buffer_update(operation, utee_authenc_update_payload, srcData, 1530 srcLen, dst, &tmp_dlen); 1531 if (res != TEE_SUCCESS) 1532 goto out; 1533 1534 dst += tmp_dlen; 1535 acc_dlen += tmp_dlen; 1536 1537 tmp_dlen = *destLen - acc_dlen; 1538 res = utee_authenc_dec_final(operation->state, operation->buffer, 1539 operation->buffer_offs, dst, &tmp_dlen, 1540 tag, tagLen); 1541 if (res != TEE_SUCCESS) 1542 goto out; 1543 1544 /* Supplied tagLen should match what we initiated with */ 1545 if (tagLen != operation->ae_tag_len) 1546 res = TEE_ERROR_MAC_INVALID; 1547 1548 acc_dlen += tmp_dlen; 1549 *destLen = acc_dlen; 1550 1551 operation->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 1552 1553 operation->operationState = TEE_OPERATION_STATE_INITIAL; 1554 1555 out: 1556 if (res != TEE_SUCCESS && 1557 res != TEE_ERROR_SHORT_BUFFER && 1558 res != TEE_ERROR_MAC_INVALID) 1559 TEE_Panic(res); 1560 1561 return res; 1562 } 1563 1564 /* Cryptographic Operations API - Asymmetric Functions */ 1565 1566 TEE_Result TEE_AsymmetricEncrypt(TEE_OperationHandle operation, 1567 TEE_Attribute *params, 1568 uint32_t paramCount, void *srcData, 1569 uint32_t srcLen, void *destData, 1570 uint32_t *destLen) 1571 { 1572 TEE_Result res; 1573 struct utee_attribute ua[paramCount]; 1574 uint64_t dl; 1575 1576 if (operation == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 1577 destLen == NULL || (destData == NULL && *destLen != 0)) 1578 TEE_Panic(0); 1579 if (params == NULL && paramCount != 0) 1580 TEE_Panic(0); 1581 if (!operation->key1) 1582 TEE_Panic(0); 1583 if (operation->info.operationClass != TEE_OPERATION_ASYMMETRIC_CIPHER) 1584 TEE_Panic(0); 1585 if (operation->info.mode != TEE_MODE_ENCRYPT) 1586 TEE_Panic(0); 1587 1588 __utee_from_attr(ua, params, paramCount); 1589 dl = *destLen; 1590 res = utee_asymm_operate(operation->state, ua, paramCount, srcData, 1591 srcLen, destData, &dl); 1592 *destLen = dl; 1593 1594 if (res != TEE_SUCCESS && 1595 res != TEE_ERROR_SHORT_BUFFER && 1596 res != TEE_ERROR_BAD_PARAMETERS) 1597 TEE_Panic(res); 1598 1599 return res; 1600 } 1601 1602 TEE_Result TEE_AsymmetricDecrypt(TEE_OperationHandle operation, 1603 TEE_Attribute *params, 1604 uint32_t paramCount, void *srcData, 1605 uint32_t srcLen, void *destData, 1606 uint32_t *destLen) 1607 { 1608 TEE_Result res; 1609 struct utee_attribute ua[paramCount]; 1610 uint64_t dl; 1611 1612 if (operation == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 1613 destLen == NULL || (destData == NULL && *destLen != 0)) 1614 TEE_Panic(0); 1615 if (params == NULL && paramCount != 0) 1616 TEE_Panic(0); 1617 if (!operation->key1) 1618 TEE_Panic(0); 1619 if (operation->info.operationClass != TEE_OPERATION_ASYMMETRIC_CIPHER) 1620 TEE_Panic(0); 1621 if (operation->info.mode != TEE_MODE_DECRYPT) 1622 TEE_Panic(0); 1623 1624 __utee_from_attr(ua, params, paramCount); 1625 dl = *destLen; 1626 res = utee_asymm_operate(operation->state, ua, paramCount, srcData, 1627 srcLen, destData, &dl); 1628 *destLen = dl; 1629 1630 if (res != TEE_SUCCESS && 1631 res != TEE_ERROR_SHORT_BUFFER && 1632 res != TEE_ERROR_BAD_PARAMETERS) 1633 TEE_Panic(res); 1634 1635 return res; 1636 } 1637 1638 TEE_Result TEE_AsymmetricSignDigest(TEE_OperationHandle operation, 1639 TEE_Attribute *params, 1640 uint32_t paramCount, void *digest, 1641 uint32_t digestLen, void *signature, 1642 uint32_t *signatureLen) 1643 { 1644 TEE_Result res; 1645 struct utee_attribute ua[paramCount]; 1646 uint64_t sl; 1647 1648 if (operation == TEE_HANDLE_NULL || 1649 (digest == NULL && digestLen != 0) || 1650 signature == NULL || signatureLen == NULL) 1651 TEE_Panic(0); 1652 if (params == NULL && paramCount != 0) 1653 TEE_Panic(0); 1654 if (!operation->key1) 1655 TEE_Panic(0); 1656 if (operation->info.operationClass != 1657 TEE_OPERATION_ASYMMETRIC_SIGNATURE) 1658 TEE_Panic(0); 1659 if (operation->info.mode != TEE_MODE_SIGN) 1660 TEE_Panic(0); 1661 1662 __utee_from_attr(ua, params, paramCount); 1663 sl = *signatureLen; 1664 res = utee_asymm_operate(operation->state, ua, paramCount, digest, 1665 digestLen, signature, &sl); 1666 *signatureLen = sl; 1667 1668 if (res != TEE_SUCCESS && res != TEE_ERROR_SHORT_BUFFER) 1669 TEE_Panic(res); 1670 1671 return res; 1672 } 1673 1674 TEE_Result TEE_AsymmetricVerifyDigest(TEE_OperationHandle operation, 1675 TEE_Attribute *params, 1676 uint32_t paramCount, void *digest, 1677 uint32_t digestLen, void *signature, 1678 uint32_t signatureLen) 1679 { 1680 TEE_Result res; 1681 struct utee_attribute ua[paramCount]; 1682 1683 if (operation == TEE_HANDLE_NULL || 1684 (digest == NULL && digestLen != 0) || 1685 (signature == NULL && signatureLen != 0)) 1686 TEE_Panic(0); 1687 if (params == NULL && paramCount != 0) 1688 TEE_Panic(0); 1689 if (!operation->key1) 1690 TEE_Panic(0); 1691 if (operation->info.operationClass != 1692 TEE_OPERATION_ASYMMETRIC_SIGNATURE) 1693 TEE_Panic(0); 1694 if (operation->info.mode != TEE_MODE_VERIFY) 1695 TEE_Panic(0); 1696 1697 __utee_from_attr(ua, params, paramCount); 1698 res = utee_asymm_verify(operation->state, ua, paramCount, digest, 1699 digestLen, signature, signatureLen); 1700 1701 if (res != TEE_SUCCESS && res != TEE_ERROR_SIGNATURE_INVALID) 1702 TEE_Panic(res); 1703 1704 return res; 1705 } 1706 1707 /* Cryptographic Operations API - Key Derivation Functions */ 1708 1709 void TEE_DeriveKey(TEE_OperationHandle operation, 1710 const TEE_Attribute *params, uint32_t paramCount, 1711 TEE_ObjectHandle derivedKey) 1712 { 1713 TEE_Result res; 1714 TEE_ObjectInfo key_info; 1715 struct utee_attribute ua[paramCount]; 1716 1717 if (operation == TEE_HANDLE_NULL || derivedKey == 0) 1718 TEE_Panic(0); 1719 if (params == NULL && paramCount != 0) 1720 TEE_Panic(0); 1721 if (TEE_ALG_GET_CLASS(operation->info.algorithm) != 1722 TEE_OPERATION_KEY_DERIVATION) 1723 TEE_Panic(0); 1724 1725 if (operation->info.operationClass != TEE_OPERATION_KEY_DERIVATION) 1726 TEE_Panic(0); 1727 if (!operation->key1) 1728 TEE_Panic(0); 1729 if (operation->info.mode != TEE_MODE_DERIVE) 1730 TEE_Panic(0); 1731 if ((operation->info.handleState & TEE_HANDLE_FLAG_KEY_SET) == 0) 1732 TEE_Panic(0); 1733 1734 res = utee_cryp_obj_get_info((unsigned long)derivedKey, &key_info); 1735 if (res != TEE_SUCCESS) 1736 TEE_Panic(0); 1737 1738 if (key_info.objectType != TEE_TYPE_GENERIC_SECRET) 1739 TEE_Panic(0); 1740 if ((key_info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1741 TEE_Panic(0); 1742 1743 __utee_from_attr(ua, params, paramCount); 1744 res = utee_cryp_derive_key(operation->state, ua, paramCount, 1745 (unsigned long)derivedKey); 1746 if (res != TEE_SUCCESS) 1747 TEE_Panic(res); 1748 } 1749 1750 /* Cryptographic Operations API - Random Number Generation Functions */ 1751 1752 void TEE_GenerateRandom(void *randomBuffer, uint32_t randomBufferLen) 1753 { 1754 TEE_Result res; 1755 1756 res = utee_cryp_random_number_generate(randomBuffer, randomBufferLen); 1757 if (res != TEE_SUCCESS) 1758 TEE_Panic(res); 1759 } 1760