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 38 struct __TEE_OperationHandle { 39 TEE_OperationInfo info; 40 TEE_ObjectHandle key1; 41 TEE_ObjectHandle key2; 42 uint8_t *buffer; /* buffer to collect complete blocks */ 43 bool buffer_two_blocks; /* True if two blocks need to be buffered */ 44 size_t block_size; /* Block size of cipher */ 45 size_t buffer_offs; /* Offset in buffer */ 46 uint32_t state; /* Handle to state in TEE Core */ 47 uint32_t ae_tag_len; /* 48 * tag_len in bytes for AE operation else unused 49 */ 50 }; 51 52 /* Cryptographic Operations API - Generic Operation Functions */ 53 54 TEE_Result TEE_AllocateOperation(TEE_OperationHandle *operation, 55 uint32_t algorithm, uint32_t mode, 56 uint32_t maxKeySize) 57 { 58 TEE_Result res; 59 TEE_OperationHandle op = TEE_HANDLE_NULL; 60 uint32_t handle_state = 0; 61 size_t block_size = 1; 62 uint32_t req_key_usage; 63 bool with_private_key = false; 64 bool buffer_two_blocks = false; 65 66 if (!operation) 67 TEE_Panic(0); 68 69 if (algorithm == TEE_ALG_AES_XTS) 70 handle_state = TEE_HANDLE_FLAG_EXPECT_TWO_KEYS; 71 72 /* Check algorithm max key size */ 73 switch (algorithm) { 74 case TEE_ALG_DSA_SHA1: 75 if (maxKeySize < 512) 76 return TEE_ERROR_NOT_SUPPORTED; 77 if (maxKeySize > 1024) 78 return TEE_ERROR_NOT_SUPPORTED; 79 if (maxKeySize % 64 != 0) 80 return TEE_ERROR_NOT_SUPPORTED; 81 break; 82 83 case TEE_ALG_DSA_SHA224: 84 if (maxKeySize != 2048) 85 return TEE_ERROR_NOT_SUPPORTED; 86 break; 87 88 case TEE_ALG_DSA_SHA256: 89 if (maxKeySize != 2048 && maxKeySize != 3072) 90 return TEE_ERROR_NOT_SUPPORTED; 91 break; 92 93 case TEE_ALG_ECDSA_P192: 94 case TEE_ALG_ECDH_P192: 95 if (maxKeySize != 192) 96 return TEE_ERROR_NOT_SUPPORTED; 97 break; 98 99 case TEE_ALG_ECDSA_P224: 100 case TEE_ALG_ECDH_P224: 101 if (maxKeySize != 224) 102 return TEE_ERROR_NOT_SUPPORTED; 103 break; 104 105 case TEE_ALG_ECDSA_P256: 106 case TEE_ALG_ECDH_P256: 107 if (maxKeySize != 256) 108 return TEE_ERROR_NOT_SUPPORTED; 109 break; 110 111 case TEE_ALG_ECDSA_P384: 112 case TEE_ALG_ECDH_P384: 113 if (maxKeySize != 384) 114 return TEE_ERROR_NOT_SUPPORTED; 115 break; 116 117 case TEE_ALG_ECDSA_P521: 118 case TEE_ALG_ECDH_P521: 119 if (maxKeySize != 521) 120 return TEE_ERROR_NOT_SUPPORTED; 121 break; 122 123 default: 124 break; 125 } 126 127 /* Check algorithm mode */ 128 switch (algorithm) { 129 case TEE_ALG_AES_CTS: 130 case TEE_ALG_AES_XTS: 131 buffer_two_blocks = true; 132 /*FALLTHROUGH*/ case TEE_ALG_AES_ECB_NOPAD: 133 case TEE_ALG_AES_CBC_NOPAD: 134 case TEE_ALG_AES_CTR: 135 case TEE_ALG_AES_CCM: 136 case TEE_ALG_AES_GCM: 137 case TEE_ALG_DES_ECB_NOPAD: 138 case TEE_ALG_DES_CBC_NOPAD: 139 case TEE_ALG_DES3_ECB_NOPAD: 140 case TEE_ALG_DES3_CBC_NOPAD: 141 if (TEE_ALG_GET_MAIN_ALG(algorithm) == TEE_MAIN_ALGO_AES) 142 block_size = TEE_AES_BLOCK_SIZE; 143 else 144 block_size = TEE_DES_BLOCK_SIZE; 145 146 if (mode == TEE_MODE_ENCRYPT) 147 req_key_usage = TEE_USAGE_ENCRYPT; 148 else if (mode == TEE_MODE_DECRYPT) 149 req_key_usage = TEE_USAGE_DECRYPT; 150 else 151 return TEE_ERROR_NOT_SUPPORTED; 152 break; 153 154 case TEE_ALG_RSASSA_PKCS1_V1_5_MD5: 155 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA1: 156 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA224: 157 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA256: 158 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA384: 159 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA512: 160 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA1: 161 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA224: 162 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA256: 163 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA384: 164 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA512: 165 case TEE_ALG_DSA_SHA1: 166 case TEE_ALG_DSA_SHA224: 167 case TEE_ALG_DSA_SHA256: 168 case TEE_ALG_ECDSA_P192: 169 case TEE_ALG_ECDSA_P224: 170 case TEE_ALG_ECDSA_P256: 171 case TEE_ALG_ECDSA_P384: 172 case TEE_ALG_ECDSA_P521: 173 if (mode == TEE_MODE_SIGN) { 174 with_private_key = true; 175 req_key_usage = TEE_USAGE_SIGN; 176 } else if (mode == TEE_MODE_VERIFY) { 177 req_key_usage = TEE_USAGE_VERIFY; 178 } else { 179 return TEE_ERROR_NOT_SUPPORTED; 180 } 181 break; 182 183 case TEE_ALG_RSAES_PKCS1_V1_5: 184 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA1: 185 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA224: 186 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA256: 187 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA384: 188 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA512: 189 if (mode == TEE_MODE_ENCRYPT) { 190 req_key_usage = TEE_USAGE_ENCRYPT; 191 } else if (mode == TEE_MODE_DECRYPT) { 192 with_private_key = true; 193 req_key_usage = TEE_USAGE_DECRYPT; 194 } else { 195 return TEE_ERROR_NOT_SUPPORTED; 196 } 197 break; 198 199 case TEE_ALG_RSA_NOPAD: 200 if (mode == TEE_MODE_ENCRYPT) { 201 req_key_usage = TEE_USAGE_ENCRYPT | TEE_USAGE_VERIFY; 202 } else if (mode == TEE_MODE_DECRYPT) { 203 with_private_key = true; 204 req_key_usage = TEE_USAGE_DECRYPT | TEE_USAGE_SIGN; 205 } else { 206 return TEE_ERROR_NOT_SUPPORTED; 207 } 208 break; 209 210 case TEE_ALG_DH_DERIVE_SHARED_SECRET: 211 case TEE_ALG_ECDH_P192: 212 case TEE_ALG_ECDH_P224: 213 case TEE_ALG_ECDH_P256: 214 case TEE_ALG_ECDH_P384: 215 case TEE_ALG_ECDH_P521: 216 case TEE_ALG_HKDF_MD5_DERIVE_KEY: 217 case TEE_ALG_HKDF_SHA1_DERIVE_KEY: 218 case TEE_ALG_HKDF_SHA224_DERIVE_KEY: 219 case TEE_ALG_HKDF_SHA256_DERIVE_KEY: 220 case TEE_ALG_HKDF_SHA384_DERIVE_KEY: 221 case TEE_ALG_HKDF_SHA512_DERIVE_KEY: 222 case TEE_ALG_CONCAT_KDF_SHA1_DERIVE_KEY: 223 case TEE_ALG_CONCAT_KDF_SHA224_DERIVE_KEY: 224 case TEE_ALG_CONCAT_KDF_SHA256_DERIVE_KEY: 225 case TEE_ALG_CONCAT_KDF_SHA384_DERIVE_KEY: 226 case TEE_ALG_CONCAT_KDF_SHA512_DERIVE_KEY: 227 case TEE_ALG_PBKDF2_HMAC_SHA1_DERIVE_KEY: 228 if (mode != TEE_MODE_DERIVE) 229 return TEE_ERROR_NOT_SUPPORTED; 230 with_private_key = true; 231 req_key_usage = TEE_USAGE_DERIVE; 232 break; 233 234 case TEE_ALG_MD5: 235 case TEE_ALG_SHA1: 236 case TEE_ALG_SHA224: 237 case TEE_ALG_SHA256: 238 case TEE_ALG_SHA384: 239 case TEE_ALG_SHA512: 240 if (mode != TEE_MODE_DIGEST) 241 return TEE_ERROR_NOT_SUPPORTED; 242 handle_state |= TEE_HANDLE_FLAG_KEY_SET; 243 req_key_usage = 0; 244 break; 245 246 case TEE_ALG_DES_CBC_MAC_NOPAD: 247 case TEE_ALG_AES_CBC_MAC_NOPAD: 248 case TEE_ALG_AES_CBC_MAC_PKCS5: 249 case TEE_ALG_AES_CMAC: 250 case TEE_ALG_DES_CBC_MAC_PKCS5: 251 case TEE_ALG_DES3_CBC_MAC_NOPAD: 252 case TEE_ALG_DES3_CBC_MAC_PKCS5: 253 case TEE_ALG_HMAC_MD5: 254 case TEE_ALG_HMAC_SHA1: 255 case TEE_ALG_HMAC_SHA224: 256 case TEE_ALG_HMAC_SHA256: 257 case TEE_ALG_HMAC_SHA384: 258 case TEE_ALG_HMAC_SHA512: 259 if (mode != TEE_MODE_MAC) 260 return TEE_ERROR_NOT_SUPPORTED; 261 req_key_usage = TEE_USAGE_MAC; 262 break; 263 264 default: 265 return TEE_ERROR_NOT_SUPPORTED; 266 } 267 268 op = TEE_Malloc(sizeof(*op), 0); 269 if (!op) 270 return TEE_ERROR_OUT_OF_MEMORY; 271 272 op->info.algorithm = algorithm; 273 op->info.operationClass = TEE_ALG_GET_CLASS(algorithm); 274 op->info.mode = mode; 275 op->info.maxKeySize = maxKeySize; 276 op->info.requiredKeyUsage = req_key_usage; 277 op->info.handleState = handle_state; 278 279 if (block_size > 1) { 280 size_t buffer_size = block_size; 281 282 if (buffer_two_blocks) 283 buffer_size *= 2; 284 285 op->buffer = TEE_Malloc(buffer_size, 286 TEE_USER_MEM_HINT_NO_FILL_ZERO); 287 if (op->buffer == NULL) { 288 res = TEE_ERROR_OUT_OF_MEMORY; 289 goto err0; 290 } 291 } 292 op->block_size = block_size; 293 op->buffer_two_blocks = buffer_two_blocks; 294 295 if (TEE_ALG_GET_CLASS(algorithm) != TEE_OPERATION_DIGEST) { 296 uint32_t mks = maxKeySize; 297 TEE_ObjectType key_type = TEE_ALG_GET_KEY_TYPE(algorithm, 298 with_private_key); 299 300 /* 301 * If two keys are expected the max key size is the sum of 302 * the size of both keys. 303 */ 304 if (op->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) 305 mks /= 2; 306 307 res = TEE_AllocateTransientObject(key_type, mks, &op->key1); 308 if (res != TEE_SUCCESS) 309 goto err1; 310 311 if ((op->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) != 312 0) { 313 res = TEE_AllocateTransientObject(key_type, mks, 314 &op->key2); 315 if (res != TEE_SUCCESS) 316 goto err2; 317 } 318 } 319 320 res = utee_cryp_state_alloc(algorithm, mode, (uint32_t) op->key1, 321 (uint32_t) op->key2, &op->state); 322 if (res != TEE_SUCCESS) { 323 if ((op->info.handleState & 324 TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) != 0) 325 goto err2; 326 goto err1; 327 } 328 329 /* For multi-stage operation do an "init". */ 330 TEE_ResetOperation(op); 331 *operation = op; 332 goto out; 333 334 err2: 335 TEE_FreeTransientObject(op->key2); 336 err1: 337 TEE_FreeTransientObject(op->key1); 338 err0: 339 TEE_FreeOperation(op); 340 341 if (res != TEE_SUCCESS && 342 res != TEE_ERROR_OUT_OF_MEMORY && 343 res != TEE_ERROR_NOT_SUPPORTED) 344 TEE_Panic(0); 345 out: 346 return res; 347 } 348 349 void TEE_FreeOperation(TEE_OperationHandle operation) 350 { 351 TEE_Result res; 352 353 if (operation == TEE_HANDLE_NULL) 354 TEE_Panic(0); 355 356 /* 357 * Note that keys should not be freed here, since they are 358 * claimed by the operation they will be freed by 359 * utee_cryp_state_free(). 360 */ 361 res = utee_cryp_state_free(operation->state); 362 if (res != TEE_SUCCESS) 363 TEE_Panic(0); 364 365 TEE_Free(operation->buffer); 366 TEE_Free(operation); 367 } 368 369 void TEE_GetOperationInfo(TEE_OperationHandle operation, 370 TEE_OperationInfo *operationInfo) 371 { 372 if (operation == TEE_HANDLE_NULL) 373 TEE_Panic(0); 374 375 if (operationInfo == NULL) 376 TEE_Panic(0); 377 378 *operationInfo = operation->info; 379 } 380 381 void TEE_ResetOperation(TEE_OperationHandle operation) 382 { 383 TEE_Result res; 384 385 if (operation == TEE_HANDLE_NULL) 386 TEE_Panic(0); 387 if (operation->info.operationClass == TEE_OPERATION_DIGEST) { 388 res = utee_hash_init(operation->state, NULL, 0); 389 if (res != TEE_SUCCESS) 390 TEE_Panic(res); 391 } 392 operation->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 393 } 394 395 TEE_Result TEE_SetOperationKey(TEE_OperationHandle operation, 396 TEE_ObjectHandle key) 397 { 398 TEE_Result res; 399 uint32_t key_size = 0; 400 401 if (operation == TEE_HANDLE_NULL) 402 TEE_Panic(0); 403 404 /* No key for digests */ 405 if (operation->info.operationClass == TEE_OPERATION_DIGEST) 406 TEE_Panic(0); 407 408 /* Two keys expected */ 409 if ((operation->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) != 410 0) 411 TEE_Panic(0); 412 413 if (key != TEE_HANDLE_NULL) { 414 TEE_ObjectInfo key_info; 415 416 res = TEE_GetObjectInfo1(key, &key_info); 417 if (res != TEE_SUCCESS) 418 goto err; 419 420 /* Supplied key has to meet required usage */ 421 if ((key_info.objectUsage & operation->info.requiredKeyUsage) != 422 operation->info.requiredKeyUsage) { 423 TEE_Panic(0); 424 } 425 426 if (operation->info.maxKeySize < key_info.keySize) 427 TEE_Panic(0); 428 429 key_size = key_info.keySize; 430 } 431 432 TEE_ResetTransientObject(operation->key1); 433 operation->info.handleState &= ~TEE_HANDLE_FLAG_KEY_SET; 434 435 if (key != TEE_HANDLE_NULL) { 436 res = TEE_CopyObjectAttributes1(operation->key1, key); 437 if (res != TEE_SUCCESS) 438 goto err; 439 440 operation->info.handleState |= TEE_HANDLE_FLAG_KEY_SET; 441 } 442 443 operation->info.keySize = key_size; 444 445 goto out; 446 447 err: 448 if (res == TEE_ERROR_CORRUPT_OBJECT || 449 res == TEE_ERROR_STORAGE_NOT_AVAILABLE) 450 return res; 451 TEE_Panic(0); 452 out: 453 return TEE_SUCCESS; 454 } 455 456 TEE_Result TEE_SetOperationKey2(TEE_OperationHandle operation, 457 TEE_ObjectHandle key1, TEE_ObjectHandle key2) 458 { 459 TEE_Result res; 460 uint32_t key_size = 0; 461 462 if (operation == TEE_HANDLE_NULL) 463 TEE_Panic(0); 464 465 /* Two keys not expected */ 466 if ((operation->info.handleState & TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) == 467 0) 468 TEE_Panic(0); 469 470 /* Either both keys are NULL or both are not NULL */ 471 if ((key1 == TEE_HANDLE_NULL || key2 == TEE_HANDLE_NULL) && 472 key1 != key2) 473 TEE_Panic(0); 474 475 if (key1 != TEE_HANDLE_NULL) { 476 TEE_ObjectInfo key_info1; 477 TEE_ObjectInfo key_info2; 478 479 res = TEE_GetObjectInfo1(key1, &key_info1); 480 if (res != TEE_SUCCESS) 481 goto err; 482 483 /* Supplied key has to meet required usage */ 484 if ((key_info1.objectUsage & operation->info. 485 requiredKeyUsage) != operation->info.requiredKeyUsage) { 486 TEE_Panic(0); 487 } 488 489 res = TEE_GetObjectInfo1(key2, &key_info2); 490 if (res != TEE_SUCCESS) { 491 if (res == TEE_ERROR_CORRUPT_OBJECT) 492 res = TEE_ERROR_CORRUPT_OBJECT_2; 493 goto err; 494 } 495 496 /* Supplied key has to meet required usage */ 497 if ((key_info2.objectUsage & operation->info. 498 requiredKeyUsage) != operation->info.requiredKeyUsage) { 499 TEE_Panic(0); 500 } 501 502 /* 503 * AES-XTS (the only multi key algorithm supported, requires the 504 * keys to be of equal size. 505 */ 506 if (operation->info.algorithm == TEE_ALG_AES_XTS && 507 key_info1.keySize != key_info2.keySize) 508 TEE_Panic(0); 509 510 if (operation->info.maxKeySize < key_info1.keySize) 511 TEE_Panic(0); 512 513 /* 514 * Odd that only the size of one key should be reported while 515 * size of two key are used when allocating the operation. 516 */ 517 key_size = key_info1.keySize; 518 } 519 520 TEE_ResetTransientObject(operation->key1); 521 TEE_ResetTransientObject(operation->key2); 522 operation->info.handleState &= ~TEE_HANDLE_FLAG_KEY_SET; 523 524 if (key1 != TEE_HANDLE_NULL) { 525 res = TEE_CopyObjectAttributes1(operation->key1, key1); 526 if (res != TEE_SUCCESS) 527 goto err; 528 529 res = TEE_CopyObjectAttributes1(operation->key2, key2); 530 if (res != TEE_SUCCESS) { 531 if (res == TEE_ERROR_CORRUPT_OBJECT) 532 res = TEE_ERROR_CORRUPT_OBJECT_2; 533 goto err; 534 } 535 536 operation->info.handleState |= TEE_HANDLE_FLAG_KEY_SET; 537 } 538 539 operation->info.keySize = key_size; 540 541 goto out; 542 543 err: 544 if (res == TEE_ERROR_CORRUPT_OBJECT || 545 res == TEE_ERROR_CORRUPT_OBJECT_2 || 546 res == TEE_ERROR_STORAGE_NOT_AVAILABLE || 547 res == TEE_ERROR_STORAGE_NOT_AVAILABLE_2) 548 return res; 549 TEE_Panic(0); 550 out: 551 return TEE_SUCCESS; 552 } 553 554 void TEE_CopyOperation(TEE_OperationHandle dst_op, TEE_OperationHandle src_op) 555 { 556 TEE_Result res; 557 558 if (dst_op == TEE_HANDLE_NULL || src_op == TEE_HANDLE_NULL) 559 TEE_Panic(0); 560 if (dst_op->info.algorithm != src_op->info.algorithm) 561 TEE_Panic(0); 562 if (src_op->info.operationClass != TEE_OPERATION_DIGEST) { 563 TEE_ObjectHandle key1 = TEE_HANDLE_NULL; 564 TEE_ObjectHandle key2 = TEE_HANDLE_NULL; 565 566 if (src_op->info.handleState & TEE_HANDLE_FLAG_KEY_SET) { 567 key1 = src_op->key1; 568 key2 = src_op->key2; 569 } 570 571 if ((src_op->info.handleState & 572 TEE_HANDLE_FLAG_EXPECT_TWO_KEYS) == 0) { 573 TEE_SetOperationKey(dst_op, key1); 574 } else { 575 TEE_SetOperationKey2(dst_op, key1, key2); 576 } 577 } 578 dst_op->info.handleState = src_op->info.handleState; 579 dst_op->info.keySize = src_op->info.keySize; 580 581 if (dst_op->buffer_two_blocks != src_op->buffer_two_blocks || 582 dst_op->block_size != src_op->block_size) 583 TEE_Panic(0); 584 585 if (dst_op->buffer != NULL) { 586 if (src_op->buffer == NULL) 587 TEE_Panic(0); 588 589 memcpy(dst_op->buffer, src_op->buffer, src_op->buffer_offs); 590 dst_op->buffer_offs = src_op->buffer_offs; 591 } else if (src_op->buffer != NULL) { 592 TEE_Panic(0); 593 } 594 595 res = utee_cryp_state_copy(dst_op->state, src_op->state); 596 if (res != TEE_SUCCESS) 597 TEE_Panic(res); 598 } 599 600 /* Cryptographic Operations API - Message Digest Functions */ 601 602 void TEE_DigestUpdate(TEE_OperationHandle operation, 603 void *chunk, uint32_t chunkSize) 604 { 605 TEE_Result res = TEE_ERROR_GENERIC; 606 607 if (operation == TEE_HANDLE_NULL || 608 operation->info.operationClass != TEE_OPERATION_DIGEST) 609 TEE_Panic(0); 610 611 res = utee_hash_update(operation->state, chunk, chunkSize); 612 if (res != TEE_SUCCESS) 613 TEE_Panic(res); 614 } 615 616 TEE_Result TEE_DigestDoFinal(TEE_OperationHandle operation, const void *chunk, 617 uint32_t chunkLen, void *hash, uint32_t *hashLen) 618 { 619 if ((operation == TEE_HANDLE_NULL) || (!chunk && chunkLen) || 620 !hash || !hashLen || 621 (operation->info.operationClass != TEE_OPERATION_DIGEST)) 622 TEE_Panic(0); 623 624 return utee_hash_final(operation->state, chunk, chunkLen, hash, 625 hashLen); 626 } 627 628 /* Cryptographic Operations API - Symmetric Cipher Functions */ 629 630 void TEE_CipherInit(TEE_OperationHandle operation, const void *IV, uint32_t IVLen) 631 { 632 TEE_Result res; 633 634 if (operation == TEE_HANDLE_NULL) 635 TEE_Panic(0); 636 if (operation->info.operationClass != TEE_OPERATION_CIPHER) 637 TEE_Panic(0); 638 res = utee_cipher_init(operation->state, IV, IVLen); 639 if (res != TEE_SUCCESS) 640 TEE_Panic(res); 641 operation->buffer_offs = 0; 642 operation->info.handleState |= TEE_HANDLE_FLAG_INITIALIZED; 643 } 644 645 static TEE_Result tee_buffer_update( 646 TEE_OperationHandle op, 647 TEE_Result(*update_func) (uint32_t state, const void *src, 648 size_t slen, void *dst, uint32_t *dlen), 649 const void *src_data, size_t src_len, 650 void *dest_data, uint32_t *dest_len) 651 { 652 TEE_Result res; 653 const uint8_t *src = src_data; 654 size_t slen = src_len; 655 uint8_t *dst = dest_data; 656 size_t dlen = *dest_len; 657 size_t acc_dlen = 0; 658 uint32_t tmp_dlen; 659 size_t l; 660 size_t buffer_size; 661 size_t buffer_left; 662 663 if (op->buffer_two_blocks) { 664 buffer_size = op->block_size * 2; 665 buffer_left = 1; 666 } else { 667 buffer_size = op->block_size; 668 buffer_left = 0; 669 } 670 671 if (op->buffer_offs > 0) { 672 /* Fill up complete block */ 673 if (op->buffer_offs < op->block_size) 674 l = MIN(slen, op->block_size - op->buffer_offs); 675 else 676 l = MIN(slen, buffer_size - op->buffer_offs); 677 memcpy(op->buffer + op->buffer_offs, src, l); 678 op->buffer_offs += l; 679 src += l; 680 slen -= l; 681 if ((op->buffer_offs % op->block_size) != 0) 682 goto out; /* Nothing left to do */ 683 } 684 685 /* If we can feed from buffer */ 686 if ((op->buffer_offs > 0) && 687 ((op->buffer_offs + slen) >= (buffer_size + buffer_left))) { 688 l = ROUNDUP(op->buffer_offs + slen - buffer_size, 689 op->block_size); 690 l = MIN(op->buffer_offs, l); 691 tmp_dlen = dlen; 692 res = update_func(op->state, op->buffer, l, dst, &tmp_dlen); 693 if (res != TEE_SUCCESS) 694 TEE_Panic(res); 695 dst += tmp_dlen; 696 dlen -= tmp_dlen; 697 acc_dlen += tmp_dlen; 698 op->buffer_offs -= l; 699 if (op->buffer_offs > 0) { 700 /* 701 * Slen is small enough to be contained in rest buffer. 702 */ 703 memcpy(op->buffer, op->buffer + l, buffer_size - l); 704 memcpy(op->buffer + op->buffer_offs, src, slen); 705 op->buffer_offs += slen; 706 goto out; /* Nothing left to do */ 707 } 708 } 709 710 if (slen >= (buffer_size + buffer_left)) { 711 /* Buffer is empty, feed as much as possible from src */ 712 if (TEE_ALIGNMENT_IS_OK(src, uint32_t)) { 713 l = ROUNDUP(slen - buffer_size + 1, op->block_size); 714 715 tmp_dlen = dlen; 716 res = update_func(op->state, src, l, dst, &tmp_dlen); 717 if (res != TEE_SUCCESS) 718 TEE_Panic(res); 719 src += l; 720 slen -= l; 721 dst += tmp_dlen; 722 dlen -= tmp_dlen; 723 acc_dlen += tmp_dlen; 724 } else { 725 /* 726 * Supplied data isn't well aligned, we're forced to 727 * feed through the buffer. 728 */ 729 while (slen >= op->block_size) { 730 memcpy(op->buffer, src, op->block_size); 731 732 tmp_dlen = dlen; 733 res = 734 update_func(op->state, op->buffer, 735 op->block_size, dst, &tmp_dlen); 736 if (res != TEE_SUCCESS) 737 TEE_Panic(res); 738 src += op->block_size; 739 slen -= op->block_size; 740 dst += tmp_dlen; 741 dlen -= tmp_dlen; 742 acc_dlen += tmp_dlen; 743 } 744 } 745 } 746 747 /* Slen is small enough to be contained in buffer. */ 748 memcpy(op->buffer + op->buffer_offs, src, slen); 749 op->buffer_offs += slen; 750 751 out: 752 *dest_len = acc_dlen; 753 return TEE_SUCCESS; 754 } 755 756 TEE_Result TEE_CipherUpdate(TEE_OperationHandle op, const void *srcData, 757 uint32_t srcLen, void *destData, uint32_t *destLen) 758 { 759 size_t req_dlen; 760 761 if (op == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 762 destLen == NULL || (destData == NULL && *destLen != 0)) 763 TEE_Panic(0); 764 if (op->info.operationClass != TEE_OPERATION_CIPHER) 765 TEE_Panic(0); 766 if ((op->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 767 TEE_Panic(0); 768 769 /* Calculate required dlen */ 770 req_dlen = ((op->buffer_offs + srcLen) / op->block_size) * 771 op->block_size; 772 if (op->buffer_two_blocks) { 773 if (req_dlen > op->block_size * 2) 774 req_dlen -= op->block_size * 2; 775 else 776 req_dlen = 0; 777 } 778 /* 779 * Check that required destLen is big enough before starting to feed 780 * data to the algorithm. Errors during feeding of data are fatal as we 781 * can't restore sync with this API. 782 */ 783 if (*destLen < req_dlen) { 784 *destLen = req_dlen; 785 return TEE_ERROR_SHORT_BUFFER; 786 } 787 788 tee_buffer_update(op, utee_cipher_update, srcData, srcLen, destData, 789 destLen); 790 791 return TEE_SUCCESS; 792 } 793 794 TEE_Result TEE_CipherDoFinal(TEE_OperationHandle op, 795 const void *srcData, uint32_t srcLen, void *destData, 796 uint32_t *destLen) 797 { 798 TEE_Result res; 799 uint8_t *dst = destData; 800 size_t acc_dlen = 0; 801 uint32_t tmp_dlen; 802 size_t req_dlen; 803 804 if (op == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 805 destLen == NULL || (destData == NULL && *destLen != 0)) 806 TEE_Panic(0); 807 if (op->info.operationClass != TEE_OPERATION_CIPHER) 808 TEE_Panic(0); 809 if ((op->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 810 TEE_Panic(0); 811 812 /* 813 * Check that the final block doesn't require padding for those 814 * algorithms that requires client to supply padding. 815 */ 816 if (op->info.algorithm == TEE_ALG_AES_ECB_NOPAD || 817 op->info.algorithm == TEE_ALG_AES_CBC_NOPAD || 818 op->info.algorithm == TEE_ALG_DES_ECB_NOPAD || 819 op->info.algorithm == TEE_ALG_DES_CBC_NOPAD || 820 op->info.algorithm == TEE_ALG_DES3_ECB_NOPAD || 821 op->info.algorithm == TEE_ALG_DES3_CBC_NOPAD) { 822 if (((op->buffer_offs + srcLen) % op->block_size) != 0) 823 return TEE_ERROR_BAD_PARAMETERS; 824 } 825 826 /* 827 * Check that required destLen is big enough before starting to feed 828 * data to the algorithm. Errors during feeding of data are fatal as we 829 * can't restore sync with this API. 830 */ 831 req_dlen = op->buffer_offs + srcLen; 832 if (*destLen < req_dlen) { 833 *destLen = req_dlen; 834 return TEE_ERROR_SHORT_BUFFER; 835 } 836 837 tmp_dlen = *destLen - acc_dlen; 838 tee_buffer_update(op, utee_cipher_update, srcData, srcLen, dst, 839 &tmp_dlen); 840 dst += tmp_dlen; 841 acc_dlen += tmp_dlen; 842 843 tmp_dlen = *destLen - acc_dlen; 844 res = utee_cipher_final(op->state, op->buffer, op->buffer_offs, 845 dst, &tmp_dlen); 846 if (res != TEE_SUCCESS) 847 TEE_Panic(res); 848 acc_dlen += tmp_dlen; 849 850 op->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 851 *destLen = acc_dlen; 852 return TEE_SUCCESS; 853 } 854 855 /* Cryptographic Operations API - MAC Functions */ 856 857 void TEE_MACInit(TEE_OperationHandle operation, const void *IV, uint32_t IVLen) 858 { 859 TEE_Result res; 860 861 if (operation == TEE_HANDLE_NULL) 862 TEE_Panic(0); 863 if (IV == NULL && IVLen != 0) 864 TEE_Panic(0); 865 if (operation->info.operationClass != TEE_OPERATION_MAC) 866 TEE_Panic(0); 867 res = utee_hash_init(operation->state, IV, IVLen); 868 if (res != TEE_SUCCESS) 869 TEE_Panic(res); 870 operation->buffer_offs = 0; 871 operation->info.handleState |= TEE_HANDLE_FLAG_INITIALIZED; 872 } 873 874 void TEE_MACUpdate(TEE_OperationHandle op, const void *chunk, uint32_t chunkSize) 875 { 876 TEE_Result res; 877 878 if (op == TEE_HANDLE_NULL || (chunk == NULL && chunkSize != 0)) 879 TEE_Panic(0); 880 if (op->info.operationClass != TEE_OPERATION_MAC) 881 TEE_Panic(0); 882 if ((op->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 883 TEE_Panic(0); 884 885 res = utee_hash_update(op->state, chunk, chunkSize); 886 if (res != TEE_SUCCESS) 887 TEE_Panic(res); 888 } 889 890 TEE_Result TEE_MACComputeFinal(TEE_OperationHandle op, 891 const void *message, uint32_t messageLen, 892 void *mac, uint32_t *macLen) 893 { 894 TEE_Result res; 895 896 if (op == TEE_HANDLE_NULL || (message == NULL && messageLen != 0) || 897 mac == NULL || macLen == NULL) 898 TEE_Panic(0); 899 if (op->info.operationClass != TEE_OPERATION_MAC) 900 TEE_Panic(0); 901 if ((op->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 902 TEE_Panic(0); 903 904 res = utee_hash_final(op->state, message, messageLen, mac, macLen); 905 op->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 906 return res; 907 } 908 909 TEE_Result TEE_MACCompareFinal(TEE_OperationHandle operation, 910 const void *message, uint32_t messageLen, 911 const void *mac, uint32_t macLen) 912 { 913 TEE_Result res; 914 uint8_t computed_mac[TEE_MAX_HASH_SIZE]; 915 uint32_t computed_mac_size = TEE_MAX_HASH_SIZE; 916 917 res = TEE_MACComputeFinal(operation, message, messageLen, computed_mac, 918 &computed_mac_size); 919 if (res != TEE_SUCCESS) 920 return res; 921 if (computed_mac_size != macLen) 922 return TEE_ERROR_MAC_INVALID; 923 if (buf_compare_ct(mac, computed_mac, computed_mac_size) != 0) 924 return TEE_ERROR_MAC_INVALID; 925 return TEE_SUCCESS; 926 } 927 928 /* Cryptographic Operations API - Authenticated Encryption Functions */ 929 930 TEE_Result TEE_AEInit(TEE_OperationHandle op, const void *nonce, 931 uint32_t nonceLen, uint32_t tagLen, uint32_t AADLen, 932 uint32_t payloadLen) 933 { 934 TEE_Result res; 935 936 if (op == TEE_HANDLE_NULL || nonce == NULL) 937 TEE_Panic(0); 938 if (op->info.operationClass != TEE_OPERATION_AE) 939 TEE_Panic(0); 940 941 /* 942 * AES-CCM tag len is specified by AES-CCM spec and handled in TEE Core 943 * in the implementation. But AES-GCM spec doesn't specify the tag len 944 * according to the same principle so we have to check here instead to 945 * be GP compliant. 946 */ 947 if (op->info.algorithm == TEE_ALG_AES_GCM) { 948 /* 949 * From GP spec: For AES-GCM, can be 128, 120, 112, 104, or 96 950 */ 951 if (tagLen < 96 || tagLen > 128 || (tagLen % 8 != 0)) 952 return TEE_ERROR_NOT_SUPPORTED; 953 } 954 955 res = utee_authenc_init(op->state, nonce, nonceLen, tagLen / 8, AADLen, 956 payloadLen); 957 if (res != TEE_SUCCESS) { 958 if (res != TEE_ERROR_NOT_SUPPORTED) 959 TEE_Panic(res); 960 return res; 961 } 962 op->ae_tag_len = tagLen / 8; 963 964 op->info.handleState |= TEE_HANDLE_FLAG_INITIALIZED; 965 return TEE_SUCCESS; 966 } 967 968 void TEE_AEUpdateAAD(TEE_OperationHandle op, const void *AADdata, 969 uint32_t AADdataLen) 970 { 971 TEE_Result res; 972 973 if (op == TEE_HANDLE_NULL || (AADdata == NULL && AADdataLen != 0)) 974 TEE_Panic(0); 975 if (op->info.operationClass != TEE_OPERATION_AE) 976 TEE_Panic(0); 977 if ((op->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 978 TEE_Panic(0); 979 980 res = utee_authenc_update_aad(op->state, AADdata, AADdataLen); 981 if (res != TEE_SUCCESS) 982 TEE_Panic(res); 983 } 984 985 TEE_Result TEE_AEUpdate(TEE_OperationHandle op, const void *srcData, 986 uint32_t srcLen, void *destData, uint32_t *destLen) 987 { 988 size_t req_dlen; 989 990 if (op == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 991 destLen == NULL || (destData == NULL && *destLen != 0)) 992 TEE_Panic(0); 993 if (op->info.operationClass != TEE_OPERATION_AE) 994 TEE_Panic(0); 995 if ((op->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 996 TEE_Panic(0); 997 998 /* 999 * Check that required destLen is big enough before starting to feed 1000 * data to the algorithm. Errors during feeding of data are fatal as we 1001 * can't restore sync with this API. 1002 */ 1003 req_dlen = ROUNDDOWN(op->buffer_offs + srcLen, op->block_size); 1004 if (*destLen < req_dlen) { 1005 *destLen = req_dlen; 1006 return TEE_ERROR_SHORT_BUFFER; 1007 } 1008 1009 tee_buffer_update(op, utee_authenc_update_payload, srcData, srcLen, 1010 destData, destLen); 1011 1012 return TEE_SUCCESS; 1013 } 1014 1015 TEE_Result TEE_AEEncryptFinal(TEE_OperationHandle op, 1016 const void *srcData, uint32_t srcLen, 1017 void *destData, uint32_t *destLen, void *tag, 1018 uint32_t *tagLen) 1019 { 1020 TEE_Result res; 1021 uint8_t *dst = destData; 1022 size_t acc_dlen = 0; 1023 uint32_t tmp_dlen; 1024 size_t req_dlen; 1025 1026 if (op == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 1027 destLen == NULL || (destData == NULL && *destLen != 0) || 1028 tag == NULL || tagLen == NULL) 1029 TEE_Panic(0); 1030 if (op->info.operationClass != TEE_OPERATION_AE) 1031 TEE_Panic(0); 1032 if ((op->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 1033 TEE_Panic(0); 1034 1035 /* 1036 * Check that required destLen is big enough before starting to feed 1037 * data to the algorithm. Errors during feeding of data are fatal as we 1038 * can't restore sync with this API. 1039 */ 1040 req_dlen = op->buffer_offs + srcLen; 1041 if (*destLen < req_dlen) { 1042 *destLen = req_dlen; 1043 return TEE_ERROR_SHORT_BUFFER; 1044 } 1045 1046 /* 1047 * Need to check this before update_payload since sync would be lost if 1048 * we return short buffer after that. 1049 */ 1050 if (*tagLen < op->ae_tag_len) { 1051 *tagLen = op->ae_tag_len; 1052 return TEE_ERROR_SHORT_BUFFER; 1053 } 1054 1055 tmp_dlen = *destLen - acc_dlen; 1056 tee_buffer_update(op, utee_authenc_update_payload, srcData, srcLen, 1057 dst, &tmp_dlen); 1058 dst += tmp_dlen; 1059 acc_dlen += tmp_dlen; 1060 1061 tmp_dlen = *destLen - acc_dlen; 1062 res = 1063 utee_authenc_enc_final(op->state, op->buffer, op->buffer_offs, dst, 1064 &tmp_dlen, tag, tagLen); 1065 if (res != TEE_SUCCESS) 1066 TEE_Panic(res); 1067 acc_dlen += tmp_dlen; 1068 1069 *destLen = acc_dlen; 1070 op->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 1071 1072 return res; 1073 } 1074 1075 TEE_Result TEE_AEDecryptFinal(TEE_OperationHandle op, 1076 const void *srcData, uint32_t srcLen, 1077 void *destData, uint32_t *destLen, const void *tag, 1078 uint32_t tagLen) 1079 { 1080 TEE_Result res; 1081 uint8_t *dst = destData; 1082 size_t acc_dlen = 0; 1083 uint32_t tmp_dlen; 1084 size_t req_dlen; 1085 1086 if (op == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 1087 destLen == NULL || (destData == NULL && *destLen != 0) || 1088 (tag == NULL && tagLen != 0)) 1089 TEE_Panic(0); 1090 if (op->info.operationClass != TEE_OPERATION_AE) 1091 TEE_Panic(0); 1092 if ((op->info.handleState & TEE_HANDLE_FLAG_INITIALIZED) == 0) 1093 TEE_Panic(0); 1094 1095 /* 1096 * Check that required destLen is big enough before starting to feed 1097 * data to the algorithm. Errors during feeding of data are fatal as we 1098 * can't restore sync with this API. 1099 */ 1100 req_dlen = op->buffer_offs + srcLen; 1101 if (*destLen < req_dlen) { 1102 *destLen = req_dlen; 1103 return TEE_ERROR_SHORT_BUFFER; 1104 } 1105 1106 tmp_dlen = *destLen - acc_dlen; 1107 tee_buffer_update(op, utee_authenc_update_payload, srcData, srcLen, 1108 dst, &tmp_dlen); 1109 dst += tmp_dlen; 1110 acc_dlen += tmp_dlen; 1111 1112 tmp_dlen = *destLen - acc_dlen; 1113 res = 1114 utee_authenc_dec_final(op->state, op->buffer, op->buffer_offs, dst, 1115 &tmp_dlen, tag, tagLen); 1116 if (res != TEE_SUCCESS && res != TEE_ERROR_MAC_INVALID) 1117 TEE_Panic(res); 1118 /* Supplied tagLen should match what we initiated with */ 1119 if (tagLen != op->ae_tag_len) 1120 res = TEE_ERROR_MAC_INVALID; 1121 1122 acc_dlen += tmp_dlen; 1123 1124 *destLen = acc_dlen; 1125 op->info.handleState &= ~TEE_HANDLE_FLAG_INITIALIZED; 1126 1127 return res; 1128 } 1129 1130 /* Cryptographic Operations API - Asymmetric Functions */ 1131 1132 TEE_Result TEE_AsymmetricEncrypt(TEE_OperationHandle op, 1133 const TEE_Attribute *params, 1134 uint32_t paramCount, const void *srcData, 1135 uint32_t srcLen, void *destData, 1136 uint32_t *destLen) 1137 { 1138 TEE_Result res; 1139 1140 if (op == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 1141 destLen == NULL || (destData == NULL && *destLen != 0)) 1142 TEE_Panic(0); 1143 if (paramCount != 0 && params == NULL) 1144 TEE_Panic(0); 1145 if (op->info.operationClass != TEE_OPERATION_ASYMMETRIC_CIPHER) 1146 TEE_Panic(0); 1147 if (op->info.mode != TEE_MODE_ENCRYPT) 1148 TEE_Panic(0); 1149 1150 res = utee_asymm_operate(op->state, params, paramCount, srcData, srcLen, 1151 destData, destLen); 1152 if (res != TEE_SUCCESS && 1153 res != TEE_ERROR_SHORT_BUFFER && 1154 res != TEE_ERROR_BAD_PARAMETERS) 1155 TEE_Panic(res); 1156 return res; 1157 } 1158 1159 TEE_Result TEE_AsymmetricDecrypt(TEE_OperationHandle op, 1160 const TEE_Attribute *params, 1161 uint32_t paramCount, const void *srcData, 1162 uint32_t srcLen, void *destData, 1163 uint32_t *destLen) 1164 { 1165 TEE_Result res; 1166 1167 if (op == TEE_HANDLE_NULL || (srcData == NULL && srcLen != 0) || 1168 destLen == NULL || (destData == NULL && *destLen != 0)) 1169 TEE_Panic(0); 1170 if (paramCount != 0 && params == NULL) 1171 TEE_Panic(0); 1172 if (op->info.operationClass != TEE_OPERATION_ASYMMETRIC_CIPHER) 1173 TEE_Panic(0); 1174 if (op->info.mode != TEE_MODE_DECRYPT) 1175 TEE_Panic(0); 1176 1177 res = utee_asymm_operate(op->state, params, paramCount, srcData, srcLen, 1178 destData, destLen); 1179 if (res != TEE_SUCCESS && 1180 res != TEE_ERROR_SHORT_BUFFER && 1181 res != TEE_ERROR_BAD_PARAMETERS) 1182 TEE_Panic(res); 1183 return res; 1184 } 1185 1186 TEE_Result TEE_AsymmetricSignDigest(TEE_OperationHandle op, 1187 const TEE_Attribute *params, 1188 uint32_t paramCount, const void *digest, 1189 uint32_t digestLen, void *signature, 1190 uint32_t *signatureLen) 1191 { 1192 TEE_Result res; 1193 1194 if (op == TEE_HANDLE_NULL || (digest == NULL && digestLen != 0) || 1195 signature == NULL || signatureLen == NULL) 1196 TEE_Panic(0); 1197 if (paramCount != 0 && params == NULL) 1198 TEE_Panic(0); 1199 if (op->info.operationClass != TEE_OPERATION_ASYMMETRIC_SIGNATURE) 1200 TEE_Panic(0); 1201 if (op->info.mode != TEE_MODE_SIGN) 1202 TEE_Panic(0); 1203 1204 res = 1205 utee_asymm_operate(op->state, params, paramCount, digest, digestLen, 1206 signature, signatureLen); 1207 if (res != TEE_SUCCESS && res != TEE_ERROR_SHORT_BUFFER) 1208 TEE_Panic(res); 1209 return res; 1210 } 1211 1212 TEE_Result TEE_AsymmetricVerifyDigest(TEE_OperationHandle op, 1213 const TEE_Attribute *params, 1214 uint32_t paramCount, const void *digest, 1215 uint32_t digestLen, const void *signature, 1216 uint32_t signatureLen) 1217 { 1218 TEE_Result res; 1219 1220 if (op == TEE_HANDLE_NULL || (digest == NULL && digestLen != 0) || 1221 (signature == NULL && signatureLen != 0)) 1222 TEE_Panic(0); 1223 if (paramCount != 0 && params == NULL) 1224 TEE_Panic(0); 1225 if (op->info.operationClass != TEE_OPERATION_ASYMMETRIC_SIGNATURE) 1226 TEE_Panic(0); 1227 if (op->info.mode != TEE_MODE_VERIFY) 1228 TEE_Panic(0); 1229 1230 res = 1231 utee_asymm_verify(op->state, params, paramCount, digest, digestLen, 1232 signature, signatureLen); 1233 if (res != TEE_SUCCESS && res != TEE_ERROR_SIGNATURE_INVALID) 1234 TEE_Panic(res); 1235 return res; 1236 } 1237 1238 /* Cryptographic Operations API - Key Derivation Functions */ 1239 1240 void TEE_DeriveKey(TEE_OperationHandle operation, 1241 const TEE_Attribute *params, uint32_t paramCount, 1242 TEE_ObjectHandle derivedKey) 1243 { 1244 TEE_Result res; 1245 TEE_ObjectInfo key_info; 1246 1247 if (operation == TEE_HANDLE_NULL || derivedKey == 0) 1248 TEE_Panic(0); 1249 if (paramCount != 0 && params == NULL) 1250 TEE_Panic(0); 1251 if (TEE_ALG_GET_CLASS(operation->info.algorithm) != 1252 TEE_OPERATION_KEY_DERIVATION) 1253 TEE_Panic(0); 1254 1255 if (operation->info.operationClass != TEE_OPERATION_KEY_DERIVATION) 1256 TEE_Panic(0); 1257 if (operation->info.mode != TEE_MODE_DERIVE) 1258 TEE_Panic(0); 1259 if ((operation->info.handleState & TEE_HANDLE_FLAG_KEY_SET) == 0) 1260 TEE_Panic(0); 1261 1262 res = utee_cryp_obj_get_info((uint32_t) derivedKey, &key_info); 1263 if (res != TEE_SUCCESS) 1264 TEE_Panic(0); 1265 1266 if (key_info.objectType != TEE_TYPE_GENERIC_SECRET) 1267 TEE_Panic(0); 1268 if ((key_info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1269 TEE_Panic(0); 1270 1271 res = utee_cryp_derive_key(operation->state, params, paramCount, 1272 (uint32_t) derivedKey); 1273 if (res != TEE_SUCCESS) 1274 TEE_Panic(res); 1275 } 1276 1277 /* Cryptographic Operations API - Random Number Generation Functions */ 1278 1279 void TEE_GenerateRandom(void *randomBuffer, uint32_t randomBufferLen) 1280 { 1281 TEE_Result res; 1282 1283 res = utee_cryp_random_number_generate(randomBuffer, randomBufferLen); 1284 if (res != TEE_SUCCESS) 1285 TEE_Panic(res); 1286 } 1287