1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2014, STMicroelectronics International N.V. 4 * Copyright (c) 2020, Linaro Limited 5 */ 6 7 #include <assert.h> 8 #include <bitstring.h> 9 #include <compiler.h> 10 #include <config.h> 11 #include <crypto/crypto.h> 12 #include <kernel/tee_ta_manager.h> 13 #include <kernel/user_access.h> 14 #include <mm/vm.h> 15 #include <stdlib_ext.h> 16 #include <string_ext.h> 17 #include <string.h> 18 #include <sys/queue.h> 19 #include <tee_api_defines_extensions.h> 20 #include <tee_api_types.h> 21 #include <tee/tee_cryp_utl.h> 22 #include <tee/tee_obj.h> 23 #include <tee/tee_svc_cryp.h> 24 #include <tee/tee_svc.h> 25 #include <trace.h> 26 #include <utee_defines.h> 27 #include <util.h> 28 #if defined(CFG_CRYPTO_HKDF) 29 #include <tee/tee_cryp_hkdf.h> 30 #endif 31 #if defined(CFG_CRYPTO_CONCAT_KDF) 32 #include <tee/tee_cryp_concat_kdf.h> 33 #endif 34 #if defined(CFG_CRYPTO_PBKDF2) 35 #include <tee/tee_cryp_pbkdf2.h> 36 #endif 37 38 enum cryp_state { 39 CRYP_STATE_INITIALIZED = 0, 40 CRYP_STATE_UNINITIALIZED 41 }; 42 43 typedef void (*tee_cryp_ctx_finalize_func_t) (void *ctx); 44 struct tee_cryp_state { 45 TAILQ_ENTRY(tee_cryp_state) link; 46 uint32_t algo; 47 uint32_t mode; 48 vaddr_t key1; 49 vaddr_t key2; 50 void *ctx; 51 tee_cryp_ctx_finalize_func_t ctx_finalize; 52 enum cryp_state state; 53 }; 54 55 struct tee_cryp_obj_secret { 56 uint32_t key_size; 57 uint32_t alloc_size; 58 59 /* 60 * Pseudo code visualize layout of structure 61 * Next follows data, such as: 62 * uint8_t data[alloc_size] 63 * key_size must never exceed alloc_size 64 */ 65 }; 66 67 #define TEE_TYPE_ATTR_OPTIONAL BIT(0) 68 #define TEE_TYPE_ATTR_REQUIRED BIT(1) 69 #define TEE_TYPE_ATTR_OPTIONAL_GROUP BIT(2) 70 #define TEE_TYPE_ATTR_SIZE_INDICATOR BIT(3) 71 #define TEE_TYPE_ATTR_GEN_KEY_OPT BIT(4) 72 #define TEE_TYPE_ATTR_GEN_KEY_REQ BIT(5) 73 #define TEE_TYPE_ATTR_BIGNUM_MAXBITS BIT(6) 74 75 /* Handle storing of generic secret keys of varying lengths */ 76 #define ATTR_OPS_INDEX_SECRET 0 77 /* Convert to/from big-endian byte array and provider-specific bignum */ 78 #define ATTR_OPS_INDEX_BIGNUM 1 79 /* Convert to/from value attribute depending on direction */ 80 #define ATTR_OPS_INDEX_VALUE 2 81 82 struct tee_cryp_obj_type_attrs { 83 uint32_t attr_id; 84 uint16_t flags; 85 uint16_t ops_index; 86 uint16_t raw_offs; 87 uint16_t raw_size; 88 }; 89 90 #define RAW_DATA(_x, _y) \ 91 .raw_offs = offsetof(_x, _y), .raw_size = MEMBER_SIZE(_x, _y) 92 93 static const struct tee_cryp_obj_type_attrs 94 tee_cryp_obj_secret_value_attrs[] = { 95 { 96 .attr_id = TEE_ATTR_SECRET_VALUE, 97 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 98 .ops_index = ATTR_OPS_INDEX_SECRET, 99 .raw_offs = 0, 100 .raw_size = 0 101 }, 102 }; 103 104 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_rsa_pub_key_attrs[] = { 105 { 106 .attr_id = TEE_ATTR_RSA_MODULUS, 107 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 108 .ops_index = ATTR_OPS_INDEX_BIGNUM, 109 RAW_DATA(struct rsa_public_key, n) 110 }, 111 112 { 113 .attr_id = TEE_ATTR_RSA_PUBLIC_EXPONENT, 114 .flags = TEE_TYPE_ATTR_REQUIRED, 115 .ops_index = ATTR_OPS_INDEX_BIGNUM, 116 RAW_DATA(struct rsa_public_key, e) 117 }, 118 }; 119 120 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_rsa_keypair_attrs[] = { 121 { 122 .attr_id = TEE_ATTR_RSA_MODULUS, 123 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 124 .ops_index = ATTR_OPS_INDEX_BIGNUM, 125 RAW_DATA(struct rsa_keypair, n) 126 }, 127 128 { 129 .attr_id = TEE_ATTR_RSA_PUBLIC_EXPONENT, 130 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_OPT, 131 .ops_index = ATTR_OPS_INDEX_BIGNUM, 132 RAW_DATA(struct rsa_keypair, e) 133 }, 134 135 { 136 .attr_id = TEE_ATTR_RSA_PRIVATE_EXPONENT, 137 .flags = TEE_TYPE_ATTR_REQUIRED, 138 .ops_index = ATTR_OPS_INDEX_BIGNUM, 139 RAW_DATA(struct rsa_keypair, d) 140 }, 141 142 { 143 .attr_id = TEE_ATTR_RSA_PRIME1, 144 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 145 .ops_index = ATTR_OPS_INDEX_BIGNUM, 146 RAW_DATA(struct rsa_keypair, p) 147 }, 148 149 { 150 .attr_id = TEE_ATTR_RSA_PRIME2, 151 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 152 .ops_index = ATTR_OPS_INDEX_BIGNUM, 153 RAW_DATA(struct rsa_keypair, q) 154 }, 155 156 { 157 .attr_id = TEE_ATTR_RSA_EXPONENT1, 158 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 159 .ops_index = ATTR_OPS_INDEX_BIGNUM, 160 RAW_DATA(struct rsa_keypair, dp) 161 }, 162 163 { 164 .attr_id = TEE_ATTR_RSA_EXPONENT2, 165 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 166 .ops_index = ATTR_OPS_INDEX_BIGNUM, 167 RAW_DATA(struct rsa_keypair, dq) 168 }, 169 170 { 171 .attr_id = TEE_ATTR_RSA_COEFFICIENT, 172 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 173 .ops_index = ATTR_OPS_INDEX_BIGNUM, 174 RAW_DATA(struct rsa_keypair, qp) 175 }, 176 }; 177 178 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dsa_pub_key_attrs[] = { 179 { 180 .attr_id = TEE_ATTR_DSA_PRIME, 181 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 182 .ops_index = ATTR_OPS_INDEX_BIGNUM, 183 RAW_DATA(struct dsa_public_key, p) 184 }, 185 186 { 187 .attr_id = TEE_ATTR_DSA_SUBPRIME, 188 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 189 .ops_index = ATTR_OPS_INDEX_BIGNUM, 190 RAW_DATA(struct dsa_public_key, q) 191 }, 192 193 { 194 .attr_id = TEE_ATTR_DSA_BASE, 195 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 196 .ops_index = ATTR_OPS_INDEX_BIGNUM, 197 RAW_DATA(struct dsa_public_key, g) 198 }, 199 200 { 201 .attr_id = TEE_ATTR_DSA_PUBLIC_VALUE, 202 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 203 .ops_index = ATTR_OPS_INDEX_BIGNUM, 204 RAW_DATA(struct dsa_public_key, y) 205 }, 206 }; 207 208 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dsa_keypair_attrs[] = { 209 { 210 .attr_id = TEE_ATTR_DSA_PRIME, 211 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ | 212 TEE_TYPE_ATTR_BIGNUM_MAXBITS, 213 .ops_index = ATTR_OPS_INDEX_BIGNUM, 214 RAW_DATA(struct dsa_keypair, p) 215 }, 216 217 { 218 .attr_id = TEE_ATTR_DSA_SUBPRIME, 219 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | 220 TEE_TYPE_ATTR_GEN_KEY_REQ, 221 .ops_index = ATTR_OPS_INDEX_BIGNUM, 222 RAW_DATA(struct dsa_keypair, q) 223 }, 224 225 { 226 .attr_id = TEE_ATTR_DSA_BASE, 227 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ | 228 TEE_TYPE_ATTR_BIGNUM_MAXBITS, 229 .ops_index = ATTR_OPS_INDEX_BIGNUM, 230 RAW_DATA(struct dsa_keypair, g) 231 }, 232 233 { 234 .attr_id = TEE_ATTR_DSA_PRIVATE_VALUE, 235 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 236 .ops_index = ATTR_OPS_INDEX_BIGNUM, 237 RAW_DATA(struct dsa_keypair, x) 238 }, 239 240 { 241 .attr_id = TEE_ATTR_DSA_PUBLIC_VALUE, 242 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 243 .ops_index = ATTR_OPS_INDEX_BIGNUM, 244 RAW_DATA(struct dsa_keypair, y) 245 }, 246 }; 247 248 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dh_keypair_attrs[] = { 249 { 250 .attr_id = TEE_ATTR_DH_PRIME, 251 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | 252 TEE_TYPE_ATTR_GEN_KEY_REQ, 253 .ops_index = ATTR_OPS_INDEX_BIGNUM, 254 RAW_DATA(struct dh_keypair, p) 255 }, 256 257 { 258 .attr_id = TEE_ATTR_DH_BASE, 259 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ, 260 .ops_index = ATTR_OPS_INDEX_BIGNUM, 261 RAW_DATA(struct dh_keypair, g) 262 }, 263 264 { 265 .attr_id = TEE_ATTR_DH_PUBLIC_VALUE, 266 .flags = TEE_TYPE_ATTR_REQUIRED, 267 .ops_index = ATTR_OPS_INDEX_BIGNUM, 268 RAW_DATA(struct dh_keypair, y) 269 }, 270 271 { 272 .attr_id = TEE_ATTR_DH_PRIVATE_VALUE, 273 .flags = TEE_TYPE_ATTR_REQUIRED, 274 .ops_index = ATTR_OPS_INDEX_BIGNUM, 275 RAW_DATA(struct dh_keypair, x) 276 }, 277 278 { 279 .attr_id = TEE_ATTR_DH_SUBPRIME, 280 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP | TEE_TYPE_ATTR_GEN_KEY_OPT, 281 .ops_index = ATTR_OPS_INDEX_BIGNUM, 282 RAW_DATA(struct dh_keypair, q) 283 }, 284 285 { 286 .attr_id = TEE_ATTR_DH_X_BITS, 287 .flags = TEE_TYPE_ATTR_GEN_KEY_OPT, 288 .ops_index = ATTR_OPS_INDEX_VALUE, 289 RAW_DATA(struct dh_keypair, xbits) 290 }, 291 }; 292 293 #if defined(CFG_CRYPTO_HKDF) 294 static const struct tee_cryp_obj_type_attrs 295 tee_cryp_obj_hkdf_ikm_attrs[] = { 296 { 297 .attr_id = TEE_ATTR_HKDF_IKM, 298 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 299 .ops_index = ATTR_OPS_INDEX_SECRET, 300 .raw_offs = 0, 301 .raw_size = 0 302 }, 303 }; 304 #endif 305 306 #if defined(CFG_CRYPTO_CONCAT_KDF) 307 static const struct tee_cryp_obj_type_attrs 308 tee_cryp_obj_concat_kdf_z_attrs[] = { 309 { 310 .attr_id = TEE_ATTR_CONCAT_KDF_Z, 311 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 312 .ops_index = ATTR_OPS_INDEX_SECRET, 313 .raw_offs = 0, 314 .raw_size = 0 315 }, 316 }; 317 #endif 318 319 #if defined(CFG_CRYPTO_PBKDF2) 320 static const struct tee_cryp_obj_type_attrs 321 tee_cryp_obj_pbkdf2_passwd_attrs[] = { 322 { 323 .attr_id = TEE_ATTR_PBKDF2_PASSWORD, 324 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 325 .ops_index = ATTR_OPS_INDEX_SECRET, 326 .raw_offs = 0, 327 .raw_size = 0 328 }, 329 }; 330 #endif 331 332 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_ecc_pub_key_attrs[] = { 333 { 334 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, 335 .flags = TEE_TYPE_ATTR_REQUIRED, 336 .ops_index = ATTR_OPS_INDEX_BIGNUM, 337 RAW_DATA(struct ecc_public_key, x) 338 }, 339 340 { 341 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, 342 .flags = TEE_TYPE_ATTR_REQUIRED, 343 .ops_index = ATTR_OPS_INDEX_BIGNUM, 344 RAW_DATA(struct ecc_public_key, y) 345 }, 346 347 { 348 .attr_id = TEE_ATTR_ECC_CURVE, 349 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 350 .ops_index = ATTR_OPS_INDEX_VALUE, 351 RAW_DATA(struct ecc_public_key, curve) 352 }, 353 }; 354 355 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_ecc_keypair_attrs[] = { 356 { 357 .attr_id = TEE_ATTR_ECC_PRIVATE_VALUE, 358 .flags = TEE_TYPE_ATTR_REQUIRED, 359 .ops_index = ATTR_OPS_INDEX_BIGNUM, 360 RAW_DATA(struct ecc_keypair, d) 361 }, 362 363 { 364 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, 365 .flags = TEE_TYPE_ATTR_REQUIRED, 366 .ops_index = ATTR_OPS_INDEX_BIGNUM, 367 RAW_DATA(struct ecc_keypair, x) 368 }, 369 370 { 371 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, 372 .flags = TEE_TYPE_ATTR_REQUIRED, 373 .ops_index = ATTR_OPS_INDEX_BIGNUM, 374 RAW_DATA(struct ecc_keypair, y) 375 }, 376 377 { 378 .attr_id = TEE_ATTR_ECC_CURVE, 379 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | 380 TEE_TYPE_ATTR_GEN_KEY_REQ, 381 .ops_index = ATTR_OPS_INDEX_VALUE, 382 RAW_DATA(struct ecc_keypair, curve) 383 }, 384 }; 385 386 struct tee_cryp_obj_type_props { 387 TEE_ObjectType obj_type; 388 uint16_t min_size; /* may not be smaller than this */ 389 uint16_t max_size; /* may not be larger than this */ 390 uint16_t alloc_size; /* this many bytes are allocated to hold data */ 391 uint8_t quanta; /* may only be an multiple of this */ 392 393 uint8_t num_type_attrs; 394 const struct tee_cryp_obj_type_attrs *type_attrs; 395 }; 396 397 #define PROP(obj_type, quanta, min_size, max_size, alloc_size, type_attrs) \ 398 { (obj_type), (min_size), (max_size), (alloc_size), (quanta), \ 399 ARRAY_SIZE(type_attrs), (type_attrs) } 400 401 static const struct tee_cryp_obj_type_props tee_cryp_obj_props[] = { 402 PROP(TEE_TYPE_AES, 64, 128, 256, /* valid sizes 128, 192, 256 */ 403 256 / 8 + sizeof(struct tee_cryp_obj_secret), 404 tee_cryp_obj_secret_value_attrs), 405 PROP(TEE_TYPE_DES, 64, 64, 64, 406 /* Valid size 64 with parity */ 407 64 / 8 + sizeof(struct tee_cryp_obj_secret), 408 tee_cryp_obj_secret_value_attrs), 409 PROP(TEE_TYPE_DES3, 64, 128, 192, 410 /* Valid sizes 128, 192 with parity */ 411 192 / 8 + sizeof(struct tee_cryp_obj_secret), 412 tee_cryp_obj_secret_value_attrs), 413 PROP(TEE_TYPE_SM4, 128, 128, 128, 414 128 / 8 + sizeof(struct tee_cryp_obj_secret), 415 tee_cryp_obj_secret_value_attrs), 416 PROP(TEE_TYPE_HMAC_MD5, 8, 64, 512, 417 512 / 8 + sizeof(struct tee_cryp_obj_secret), 418 tee_cryp_obj_secret_value_attrs), 419 PROP(TEE_TYPE_HMAC_SHA1, 8, 80, 512, 420 512 / 8 + sizeof(struct tee_cryp_obj_secret), 421 tee_cryp_obj_secret_value_attrs), 422 PROP(TEE_TYPE_HMAC_SHA224, 8, 112, 512, 423 512 / 8 + sizeof(struct tee_cryp_obj_secret), 424 tee_cryp_obj_secret_value_attrs), 425 PROP(TEE_TYPE_HMAC_SHA256, 8, 192, 1024, 426 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 427 tee_cryp_obj_secret_value_attrs), 428 PROP(TEE_TYPE_HMAC_SHA384, 8, 256, 1024, 429 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 430 tee_cryp_obj_secret_value_attrs), 431 PROP(TEE_TYPE_HMAC_SHA512, 8, 256, 1024, 432 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 433 tee_cryp_obj_secret_value_attrs), 434 PROP(TEE_TYPE_HMAC_SM3, 8, 80, 1024, 435 512 / 8 + sizeof(struct tee_cryp_obj_secret), 436 tee_cryp_obj_secret_value_attrs), 437 PROP(TEE_TYPE_GENERIC_SECRET, 8, 0, 4096, 438 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 439 tee_cryp_obj_secret_value_attrs), 440 #if defined(CFG_CRYPTO_HKDF) 441 PROP(TEE_TYPE_HKDF_IKM, 8, 0, 4096, 442 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 443 tee_cryp_obj_hkdf_ikm_attrs), 444 #endif 445 #if defined(CFG_CRYPTO_CONCAT_KDF) 446 PROP(TEE_TYPE_CONCAT_KDF_Z, 8, 0, 4096, 447 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 448 tee_cryp_obj_concat_kdf_z_attrs), 449 #endif 450 #if defined(CFG_CRYPTO_PBKDF2) 451 PROP(TEE_TYPE_PBKDF2_PASSWORD, 8, 0, 4096, 452 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 453 tee_cryp_obj_pbkdf2_passwd_attrs), 454 #endif 455 PROP(TEE_TYPE_RSA_PUBLIC_KEY, 1, 256, CFG_CORE_BIGNUM_MAX_BITS, 456 sizeof(struct rsa_public_key), 457 tee_cryp_obj_rsa_pub_key_attrs), 458 459 PROP(TEE_TYPE_RSA_KEYPAIR, 1, 256, CFG_CORE_BIGNUM_MAX_BITS, 460 sizeof(struct rsa_keypair), 461 tee_cryp_obj_rsa_keypair_attrs), 462 463 PROP(TEE_TYPE_DSA_PUBLIC_KEY, 64, 512, 3072, 464 sizeof(struct dsa_public_key), 465 tee_cryp_obj_dsa_pub_key_attrs), 466 467 PROP(TEE_TYPE_DSA_KEYPAIR, 64, 512, 3072, 468 sizeof(struct dsa_keypair), 469 tee_cryp_obj_dsa_keypair_attrs), 470 471 PROP(TEE_TYPE_DH_KEYPAIR, 1, 256, 2048, 472 sizeof(struct dh_keypair), 473 tee_cryp_obj_dh_keypair_attrs), 474 475 PROP(TEE_TYPE_ECDSA_PUBLIC_KEY, 1, 192, 521, 476 sizeof(struct ecc_public_key), 477 tee_cryp_obj_ecc_pub_key_attrs), 478 479 PROP(TEE_TYPE_ECDSA_KEYPAIR, 1, 192, 521, 480 sizeof(struct ecc_keypair), 481 tee_cryp_obj_ecc_keypair_attrs), 482 483 PROP(TEE_TYPE_ECDH_PUBLIC_KEY, 1, 192, 521, 484 sizeof(struct ecc_public_key), 485 tee_cryp_obj_ecc_pub_key_attrs), 486 487 PROP(TEE_TYPE_ECDH_KEYPAIR, 1, 192, 521, 488 sizeof(struct ecc_keypair), 489 tee_cryp_obj_ecc_keypair_attrs), 490 491 PROP(TEE_TYPE_SM2_DSA_PUBLIC_KEY, 1, 256, 256, 492 sizeof(struct ecc_public_key), 493 tee_cryp_obj_ecc_pub_key_attrs), 494 495 PROP(TEE_TYPE_SM2_DSA_KEYPAIR, 1, 256, 256, 496 sizeof(struct ecc_keypair), 497 tee_cryp_obj_ecc_keypair_attrs), 498 499 PROP(TEE_TYPE_SM2_PKE_PUBLIC_KEY, 1, 256, 256, 500 sizeof(struct ecc_public_key), 501 tee_cryp_obj_ecc_pub_key_attrs), 502 503 PROP(TEE_TYPE_SM2_PKE_KEYPAIR, 1, 256, 256, 504 sizeof(struct ecc_keypair), 505 tee_cryp_obj_ecc_keypair_attrs), 506 507 PROP(TEE_TYPE_SM2_KEP_PUBLIC_KEY, 1, 256, 256, 508 sizeof(struct ecc_public_key), 509 tee_cryp_obj_ecc_pub_key_attrs), 510 511 PROP(TEE_TYPE_SM2_KEP_KEYPAIR, 1, 256, 256, 512 sizeof(struct ecc_keypair), 513 tee_cryp_obj_ecc_keypair_attrs), 514 }; 515 516 struct attr_ops { 517 TEE_Result (*from_user)(void *attr, const void *buffer, size_t size); 518 TEE_Result (*to_user)(void *attr, struct ts_session *sess, 519 void *buffer, uint64_t *size); 520 TEE_Result (*to_binary)(void *attr, void *data, size_t data_len, 521 size_t *offs); 522 bool (*from_binary)(void *attr, const void *data, size_t data_len, 523 size_t *offs); 524 TEE_Result (*from_obj)(void *attr, void *src_attr); 525 void (*free)(void *attr); 526 void (*clear)(void *attr); 527 }; 528 529 static TEE_Result op_u32_to_binary_helper(uint32_t v, uint8_t *data, 530 size_t data_len, size_t *offs) 531 { 532 uint32_t field; 533 size_t next_offs; 534 535 if (ADD_OVERFLOW(*offs, sizeof(field), &next_offs)) 536 return TEE_ERROR_OVERFLOW; 537 538 if (data && next_offs <= data_len) { 539 field = TEE_U32_TO_BIG_ENDIAN(v); 540 memcpy(data + *offs, &field, sizeof(field)); 541 } 542 (*offs) = next_offs; 543 544 return TEE_SUCCESS; 545 } 546 547 static bool op_u32_from_binary_helper(uint32_t *v, const uint8_t *data, 548 size_t data_len, size_t *offs) 549 { 550 uint32_t field; 551 552 if (!data || (*offs + sizeof(field)) > data_len) 553 return false; 554 555 memcpy(&field, data + *offs, sizeof(field)); 556 *v = TEE_U32_FROM_BIG_ENDIAN(field); 557 (*offs) += sizeof(field); 558 return true; 559 } 560 561 static TEE_Result op_attr_secret_value_from_user(void *attr, const void *buffer, 562 size_t size) 563 { 564 struct tee_cryp_obj_secret *key = attr; 565 566 /* Data size has to fit in allocated buffer */ 567 if (size > key->alloc_size) 568 return TEE_ERROR_SECURITY; 569 memcpy(key + 1, buffer, size); 570 key->key_size = size; 571 return TEE_SUCCESS; 572 } 573 574 static TEE_Result op_attr_secret_value_to_user(void *attr, 575 struct ts_session *sess __unused, 576 void *buffer, uint64_t *size) 577 { 578 TEE_Result res; 579 struct tee_cryp_obj_secret *key = attr; 580 uint64_t s; 581 uint64_t key_size; 582 583 res = copy_from_user(&s, size, sizeof(s)); 584 if (res != TEE_SUCCESS) 585 return res; 586 587 key_size = key->key_size; 588 res = copy_to_user(size, &key_size, sizeof(key_size)); 589 if (res != TEE_SUCCESS) 590 return res; 591 592 if (s < key->key_size || !buffer) 593 return TEE_ERROR_SHORT_BUFFER; 594 595 return copy_to_user(buffer, key + 1, key->key_size); 596 } 597 598 static TEE_Result op_attr_secret_value_to_binary(void *attr, void *data, 599 size_t data_len, size_t *offs) 600 { 601 TEE_Result res; 602 struct tee_cryp_obj_secret *key = attr; 603 size_t next_offs; 604 605 res = op_u32_to_binary_helper(key->key_size, data, data_len, offs); 606 if (res != TEE_SUCCESS) 607 return res; 608 609 if (ADD_OVERFLOW(*offs, key->key_size, &next_offs)) 610 return TEE_ERROR_OVERFLOW; 611 612 if (data && next_offs <= data_len) 613 memcpy((uint8_t *)data + *offs, key + 1, key->key_size); 614 (*offs) = next_offs; 615 616 return TEE_SUCCESS; 617 } 618 619 static bool op_attr_secret_value_from_binary(void *attr, const void *data, 620 size_t data_len, size_t *offs) 621 { 622 struct tee_cryp_obj_secret *key = attr; 623 uint32_t s; 624 625 if (!op_u32_from_binary_helper(&s, data, data_len, offs)) 626 return false; 627 628 if ((*offs + s) > data_len) 629 return false; 630 631 /* Data size has to fit in allocated buffer */ 632 if (s > key->alloc_size) 633 return false; 634 key->key_size = s; 635 memcpy(key + 1, (const uint8_t *)data + *offs, s); 636 (*offs) += s; 637 return true; 638 } 639 640 641 static TEE_Result op_attr_secret_value_from_obj(void *attr, void *src_attr) 642 { 643 struct tee_cryp_obj_secret *key = attr; 644 struct tee_cryp_obj_secret *src_key = src_attr; 645 646 if (src_key->key_size > key->alloc_size) 647 return TEE_ERROR_BAD_STATE; 648 memcpy(key + 1, src_key + 1, src_key->key_size); 649 key->key_size = src_key->key_size; 650 return TEE_SUCCESS; 651 } 652 653 static void op_attr_secret_value_clear(void *attr) 654 { 655 struct tee_cryp_obj_secret *key = attr; 656 657 key->key_size = 0; 658 memzero_explicit(key + 1, key->alloc_size); 659 } 660 661 static TEE_Result op_attr_bignum_from_user(void *attr, const void *buffer, 662 size_t size) 663 { 664 struct bignum **bn = attr; 665 666 return crypto_bignum_bin2bn(buffer, size, *bn); 667 } 668 669 static TEE_Result op_attr_bignum_to_user(void *attr, 670 struct ts_session *sess, 671 void *buffer, uint64_t *size) 672 { 673 TEE_Result res = TEE_SUCCESS; 674 struct bignum **bn = attr; 675 uint64_t req_size = 0; 676 uint64_t s = 0; 677 678 res = copy_from_user(&s, size, sizeof(s)); 679 if (res != TEE_SUCCESS) 680 return res; 681 682 req_size = crypto_bignum_num_bytes(*bn); 683 res = copy_to_user(size, &req_size, sizeof(req_size)); 684 if (res != TEE_SUCCESS) 685 return res; 686 if (!req_size) 687 return TEE_SUCCESS; 688 if (s < req_size || !buffer) 689 return TEE_ERROR_SHORT_BUFFER; 690 691 /* Check we can access data using supplied user mode pointer */ 692 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 693 TEE_MEMORY_ACCESS_READ | 694 TEE_MEMORY_ACCESS_WRITE | 695 TEE_MEMORY_ACCESS_ANY_OWNER, 696 (uaddr_t)buffer, req_size); 697 if (res != TEE_SUCCESS) 698 return res; 699 /* 700 * Write the bignum (wich raw data points to) into an array of 701 * bytes (stored in buffer) 702 */ 703 crypto_bignum_bn2bin(*bn, buffer); 704 return TEE_SUCCESS; 705 } 706 707 static TEE_Result op_attr_bignum_to_binary(void *attr, void *data, 708 size_t data_len, size_t *offs) 709 { 710 TEE_Result res; 711 struct bignum **bn = attr; 712 uint32_t n = crypto_bignum_num_bytes(*bn); 713 size_t next_offs; 714 715 res = op_u32_to_binary_helper(n, data, data_len, offs); 716 if (res != TEE_SUCCESS) 717 return res; 718 719 if (ADD_OVERFLOW(*offs, n, &next_offs)) 720 return TEE_ERROR_OVERFLOW; 721 722 if (data && next_offs <= data_len) 723 crypto_bignum_bn2bin(*bn, (uint8_t *)data + *offs); 724 (*offs) = next_offs; 725 726 return TEE_SUCCESS; 727 } 728 729 static bool op_attr_bignum_from_binary(void *attr, const void *data, 730 size_t data_len, size_t *offs) 731 { 732 struct bignum **bn = attr; 733 uint32_t n; 734 735 if (!op_u32_from_binary_helper(&n, data, data_len, offs)) 736 return false; 737 738 if ((*offs + n) > data_len) 739 return false; 740 if (crypto_bignum_bin2bn((const uint8_t *)data + *offs, n, *bn)) 741 return false; 742 (*offs) += n; 743 return true; 744 } 745 746 static TEE_Result op_attr_bignum_from_obj(void *attr, void *src_attr) 747 { 748 struct bignum **bn = attr; 749 struct bignum **src_bn = src_attr; 750 751 crypto_bignum_copy(*bn, *src_bn); 752 return TEE_SUCCESS; 753 } 754 755 static void op_attr_bignum_clear(void *attr) 756 { 757 struct bignum **bn = attr; 758 759 crypto_bignum_clear(*bn); 760 } 761 762 static void op_attr_bignum_free(void *attr) 763 { 764 struct bignum **bn = attr; 765 766 crypto_bignum_free(*bn); 767 *bn = NULL; 768 } 769 770 static TEE_Result op_attr_value_from_user(void *attr, const void *buffer, 771 size_t size) 772 { 773 uint32_t *v = attr; 774 775 if (size != sizeof(uint32_t) * 2) 776 return TEE_ERROR_GENERIC; /* "can't happen */ 777 778 /* Note that only the first value is copied */ 779 memcpy(v, buffer, sizeof(uint32_t)); 780 return TEE_SUCCESS; 781 } 782 783 static TEE_Result op_attr_value_to_user(void *attr, 784 struct ts_session *sess __unused, 785 void *buffer, uint64_t *size) 786 { 787 TEE_Result res; 788 uint32_t *v = attr; 789 uint64_t s; 790 uint32_t value[2] = { *v }; 791 uint64_t req_size = sizeof(value); 792 793 res = copy_from_user(&s, size, sizeof(s)); 794 if (res != TEE_SUCCESS) 795 return res; 796 797 if (s < req_size || !buffer) 798 return TEE_ERROR_SHORT_BUFFER; 799 800 return copy_to_user(buffer, value, req_size); 801 } 802 803 static TEE_Result op_attr_value_to_binary(void *attr, void *data, 804 size_t data_len, size_t *offs) 805 { 806 uint32_t *v = attr; 807 808 return op_u32_to_binary_helper(*v, data, data_len, offs); 809 } 810 811 static bool op_attr_value_from_binary(void *attr, const void *data, 812 size_t data_len, size_t *offs) 813 { 814 uint32_t *v = attr; 815 816 return op_u32_from_binary_helper(v, data, data_len, offs); 817 } 818 819 static TEE_Result op_attr_value_from_obj(void *attr, void *src_attr) 820 { 821 uint32_t *v = attr; 822 uint32_t *src_v = src_attr; 823 824 *v = *src_v; 825 return TEE_SUCCESS; 826 } 827 828 static void op_attr_value_clear(void *attr) 829 { 830 uint32_t *v = attr; 831 832 *v = 0; 833 } 834 835 static const struct attr_ops attr_ops[] = { 836 [ATTR_OPS_INDEX_SECRET] = { 837 .from_user = op_attr_secret_value_from_user, 838 .to_user = op_attr_secret_value_to_user, 839 .to_binary = op_attr_secret_value_to_binary, 840 .from_binary = op_attr_secret_value_from_binary, 841 .from_obj = op_attr_secret_value_from_obj, 842 .free = op_attr_secret_value_clear, /* not a typo */ 843 .clear = op_attr_secret_value_clear, 844 }, 845 [ATTR_OPS_INDEX_BIGNUM] = { 846 .from_user = op_attr_bignum_from_user, 847 .to_user = op_attr_bignum_to_user, 848 .to_binary = op_attr_bignum_to_binary, 849 .from_binary = op_attr_bignum_from_binary, 850 .from_obj = op_attr_bignum_from_obj, 851 .free = op_attr_bignum_free, 852 .clear = op_attr_bignum_clear, 853 }, 854 [ATTR_OPS_INDEX_VALUE] = { 855 .from_user = op_attr_value_from_user, 856 .to_user = op_attr_value_to_user, 857 .to_binary = op_attr_value_to_binary, 858 .from_binary = op_attr_value_from_binary, 859 .from_obj = op_attr_value_from_obj, 860 .free = op_attr_value_clear, /* not a typo */ 861 .clear = op_attr_value_clear, 862 }, 863 }; 864 865 static TEE_Result get_user_u64_as_size_t(size_t *dst, uint64_t *src) 866 { 867 uint64_t d = 0; 868 TEE_Result res = copy_from_user(&d, src, sizeof(d)); 869 870 /* 871 * On 32-bit systems a size_t can't hold a uint64_t so we need to 872 * check that the value isn't too large. 873 */ 874 if (!res && ADD_OVERFLOW(0, d, dst)) 875 return TEE_ERROR_OVERFLOW; 876 877 return res; 878 } 879 880 static TEE_Result put_user_u64(uint64_t *dst, size_t value) 881 { 882 uint64_t v = value; 883 884 return copy_to_user(dst, &v, sizeof(v)); 885 } 886 887 TEE_Result syscall_cryp_obj_get_info(unsigned long obj, TEE_ObjectInfo *info) 888 { 889 struct ts_session *sess = ts_get_current_session(); 890 TEE_Result res = TEE_SUCCESS; 891 struct tee_obj *o = NULL; 892 893 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 894 uref_to_vaddr(obj), &o); 895 if (res != TEE_SUCCESS) 896 goto exit; 897 898 res = copy_to_user_private(info, &o->info, sizeof(o->info)); 899 900 exit: 901 return res; 902 } 903 904 TEE_Result syscall_cryp_obj_restrict_usage(unsigned long obj, 905 unsigned long usage) 906 { 907 struct ts_session *sess = ts_get_current_session(); 908 TEE_Result res = TEE_SUCCESS; 909 struct tee_obj *o = NULL; 910 911 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 912 if (res != TEE_SUCCESS) 913 goto exit; 914 915 o->info.objectUsage &= usage; 916 917 exit: 918 return res; 919 } 920 921 static int tee_svc_cryp_obj_find_type_attr_idx( 922 uint32_t attr_id, 923 const struct tee_cryp_obj_type_props *type_props) 924 { 925 size_t n; 926 927 for (n = 0; n < type_props->num_type_attrs; n++) { 928 if (attr_id == type_props->type_attrs[n].attr_id) 929 return n; 930 } 931 return -1; 932 } 933 934 static const struct tee_cryp_obj_type_props *tee_svc_find_type_props( 935 TEE_ObjectType obj_type) 936 { 937 size_t n; 938 939 for (n = 0; n < ARRAY_SIZE(tee_cryp_obj_props); n++) { 940 if (tee_cryp_obj_props[n].obj_type == obj_type) 941 return tee_cryp_obj_props + n; 942 } 943 944 return NULL; 945 } 946 947 /* Set an attribute on an object */ 948 static void set_attribute(struct tee_obj *o, 949 const struct tee_cryp_obj_type_props *props, 950 uint32_t attr) 951 { 952 int idx = tee_svc_cryp_obj_find_type_attr_idx(attr, props); 953 954 if (idx < 0) 955 return; 956 o->have_attrs |= BIT(idx); 957 } 958 959 /* Get an attribute on an object */ 960 static uint32_t get_attribute(const struct tee_obj *o, 961 const struct tee_cryp_obj_type_props *props, 962 uint32_t attr) 963 { 964 int idx = tee_svc_cryp_obj_find_type_attr_idx(attr, props); 965 966 if (idx < 0) 967 return 0; 968 return o->have_attrs & BIT(idx); 969 } 970 971 TEE_Result syscall_cryp_obj_get_attr(unsigned long obj, unsigned long attr_id, 972 void *buffer, uint64_t *size) 973 { 974 struct ts_session *sess = ts_get_current_session(); 975 TEE_Result res = TEE_SUCCESS; 976 struct tee_obj *o = NULL; 977 const struct tee_cryp_obj_type_props *type_props = NULL; 978 int idx = 0; 979 const struct attr_ops *ops = NULL; 980 void *attr = NULL; 981 982 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 983 if (res != TEE_SUCCESS) 984 return TEE_ERROR_ITEM_NOT_FOUND; 985 986 /* Check that the object is initialized */ 987 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED)) 988 return TEE_ERROR_BAD_PARAMETERS; 989 990 /* Check that getting the attribute is allowed */ 991 if (!(attr_id & TEE_ATTR_FLAG_PUBLIC) && 992 !(o->info.objectUsage & TEE_USAGE_EXTRACTABLE)) 993 return TEE_ERROR_BAD_PARAMETERS; 994 995 type_props = tee_svc_find_type_props(o->info.objectType); 996 if (!type_props) { 997 /* Unknown object type, "can't happen" */ 998 return TEE_ERROR_BAD_STATE; 999 } 1000 1001 idx = tee_svc_cryp_obj_find_type_attr_idx(attr_id, type_props); 1002 if ((idx < 0) || ((o->have_attrs & (1 << idx)) == 0)) 1003 return TEE_ERROR_ITEM_NOT_FOUND; 1004 1005 ops = attr_ops + type_props->type_attrs[idx].ops_index; 1006 attr = (uint8_t *)o->attr + type_props->type_attrs[idx].raw_offs; 1007 return ops->to_user(attr, sess, buffer, size); 1008 } 1009 1010 void tee_obj_attr_free(struct tee_obj *o) 1011 { 1012 const struct tee_cryp_obj_type_props *tp; 1013 size_t n; 1014 1015 if (!o->attr) 1016 return; 1017 tp = tee_svc_find_type_props(o->info.objectType); 1018 if (!tp) 1019 return; 1020 1021 for (n = 0; n < tp->num_type_attrs; n++) { 1022 const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; 1023 1024 attr_ops[ta->ops_index].free((uint8_t *)o->attr + ta->raw_offs); 1025 } 1026 } 1027 1028 void tee_obj_attr_clear(struct tee_obj *o) 1029 { 1030 const struct tee_cryp_obj_type_props *tp; 1031 size_t n; 1032 1033 if (!o->attr) 1034 return; 1035 tp = tee_svc_find_type_props(o->info.objectType); 1036 if (!tp) 1037 return; 1038 1039 for (n = 0; n < tp->num_type_attrs; n++) { 1040 const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; 1041 1042 attr_ops[ta->ops_index].clear((uint8_t *)o->attr + 1043 ta->raw_offs); 1044 } 1045 } 1046 1047 TEE_Result tee_obj_attr_to_binary(struct tee_obj *o, void *data, 1048 size_t *data_len) 1049 { 1050 const struct tee_cryp_obj_type_props *tp; 1051 size_t n; 1052 size_t offs = 0; 1053 size_t len = data ? *data_len : 0; 1054 TEE_Result res; 1055 1056 if (o->info.objectType == TEE_TYPE_DATA) { 1057 *data_len = 0; 1058 return TEE_SUCCESS; /* pure data object */ 1059 } 1060 if (!o->attr) 1061 return TEE_ERROR_BAD_STATE; 1062 tp = tee_svc_find_type_props(o->info.objectType); 1063 if (!tp) 1064 return TEE_ERROR_BAD_STATE; 1065 1066 for (n = 0; n < tp->num_type_attrs; n++) { 1067 const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; 1068 void *attr = (uint8_t *)o->attr + ta->raw_offs; 1069 1070 res = attr_ops[ta->ops_index].to_binary(attr, data, len, &offs); 1071 if (res != TEE_SUCCESS) 1072 return res; 1073 } 1074 1075 *data_len = offs; 1076 if (data && offs > len) 1077 return TEE_ERROR_SHORT_BUFFER; 1078 return TEE_SUCCESS; 1079 } 1080 1081 TEE_Result tee_obj_attr_from_binary(struct tee_obj *o, const void *data, 1082 size_t data_len) 1083 { 1084 const struct tee_cryp_obj_type_props *tp; 1085 size_t n; 1086 size_t offs = 0; 1087 1088 if (o->info.objectType == TEE_TYPE_DATA) 1089 return TEE_SUCCESS; /* pure data object */ 1090 if (!o->attr) 1091 return TEE_ERROR_BAD_STATE; 1092 tp = tee_svc_find_type_props(o->info.objectType); 1093 if (!tp) 1094 return TEE_ERROR_BAD_STATE; 1095 1096 for (n = 0; n < tp->num_type_attrs; n++) { 1097 const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; 1098 void *attr = (uint8_t *)o->attr + ta->raw_offs; 1099 1100 if (!attr_ops[ta->ops_index].from_binary(attr, data, data_len, 1101 &offs)) 1102 return TEE_ERROR_CORRUPT_OBJECT; 1103 } 1104 return TEE_SUCCESS; 1105 } 1106 1107 TEE_Result tee_obj_attr_copy_from(struct tee_obj *o, const struct tee_obj *src) 1108 { 1109 TEE_Result res; 1110 const struct tee_cryp_obj_type_props *tp; 1111 const struct tee_cryp_obj_type_attrs *ta; 1112 size_t n; 1113 uint32_t have_attrs = 0; 1114 void *attr; 1115 void *src_attr; 1116 1117 if (o->info.objectType == TEE_TYPE_DATA) 1118 return TEE_SUCCESS; /* pure data object */ 1119 if (!o->attr) 1120 return TEE_ERROR_BAD_STATE; 1121 tp = tee_svc_find_type_props(o->info.objectType); 1122 if (!tp) 1123 return TEE_ERROR_BAD_STATE; 1124 1125 if (o->info.objectType == src->info.objectType) { 1126 have_attrs = src->have_attrs; 1127 for (n = 0; n < tp->num_type_attrs; n++) { 1128 ta = tp->type_attrs + n; 1129 attr = (uint8_t *)o->attr + ta->raw_offs; 1130 src_attr = (uint8_t *)src->attr + ta->raw_offs; 1131 res = attr_ops[ta->ops_index].from_obj(attr, src_attr); 1132 if (res != TEE_SUCCESS) 1133 return res; 1134 } 1135 } else { 1136 const struct tee_cryp_obj_type_props *tp_src; 1137 int idx; 1138 1139 if (o->info.objectType == TEE_TYPE_RSA_PUBLIC_KEY) { 1140 if (src->info.objectType != TEE_TYPE_RSA_KEYPAIR) 1141 return TEE_ERROR_BAD_PARAMETERS; 1142 } else if (o->info.objectType == TEE_TYPE_DSA_PUBLIC_KEY) { 1143 if (src->info.objectType != TEE_TYPE_DSA_KEYPAIR) 1144 return TEE_ERROR_BAD_PARAMETERS; 1145 } else if (o->info.objectType == TEE_TYPE_ECDSA_PUBLIC_KEY) { 1146 if (src->info.objectType != TEE_TYPE_ECDSA_KEYPAIR) 1147 return TEE_ERROR_BAD_PARAMETERS; 1148 } else if (o->info.objectType == TEE_TYPE_ECDH_PUBLIC_KEY) { 1149 if (src->info.objectType != TEE_TYPE_ECDH_KEYPAIR) 1150 return TEE_ERROR_BAD_PARAMETERS; 1151 } else if (o->info.objectType == TEE_TYPE_SM2_DSA_PUBLIC_KEY) { 1152 if (src->info.objectType != TEE_TYPE_SM2_DSA_KEYPAIR) 1153 return TEE_ERROR_BAD_PARAMETERS; 1154 } else if (o->info.objectType == TEE_TYPE_SM2_PKE_PUBLIC_KEY) { 1155 if (src->info.objectType != TEE_TYPE_SM2_PKE_KEYPAIR) 1156 return TEE_ERROR_BAD_PARAMETERS; 1157 } else if (o->info.objectType == TEE_TYPE_SM2_KEP_PUBLIC_KEY) { 1158 if (src->info.objectType != TEE_TYPE_SM2_KEP_KEYPAIR) 1159 return TEE_ERROR_BAD_PARAMETERS; 1160 } else { 1161 return TEE_ERROR_BAD_PARAMETERS; 1162 } 1163 1164 tp_src = tee_svc_find_type_props(src->info.objectType); 1165 if (!tp_src) 1166 return TEE_ERROR_BAD_STATE; 1167 1168 have_attrs = BIT32(tp->num_type_attrs) - 1; 1169 for (n = 0; n < tp->num_type_attrs; n++) { 1170 ta = tp->type_attrs + n; 1171 1172 idx = tee_svc_cryp_obj_find_type_attr_idx(ta->attr_id, 1173 tp_src); 1174 if (idx < 0) 1175 return TEE_ERROR_BAD_STATE; 1176 1177 attr = (uint8_t *)o->attr + ta->raw_offs; 1178 src_attr = (uint8_t *)src->attr + 1179 tp_src->type_attrs[idx].raw_offs; 1180 res = attr_ops[ta->ops_index].from_obj(attr, src_attr); 1181 if (res != TEE_SUCCESS) 1182 return res; 1183 } 1184 } 1185 1186 o->have_attrs = have_attrs; 1187 return TEE_SUCCESS; 1188 } 1189 1190 static bool is_gp_legacy_des_key_size(TEE_ObjectType type, size_t sz) 1191 { 1192 return IS_ENABLED(CFG_COMPAT_GP10_DES) && 1193 ((type == TEE_TYPE_DES && sz == 56) || 1194 (type == TEE_TYPE_DES3 && (sz == 112 || sz == 168))); 1195 } 1196 1197 static TEE_Result check_key_size(const struct tee_cryp_obj_type_props *props, 1198 size_t key_size) 1199 { 1200 size_t sz = key_size; 1201 1202 /* 1203 * In GP Internal API Specification 1.0 the partity bits aren't 1204 * counted when telling the size of the key in bits so add them 1205 * here if missing. 1206 */ 1207 if (is_gp_legacy_des_key_size(props->obj_type, sz)) 1208 sz += sz / 7; 1209 1210 if (sz % props->quanta != 0) 1211 return TEE_ERROR_NOT_SUPPORTED; 1212 if (sz < props->min_size) 1213 return TEE_ERROR_NOT_SUPPORTED; 1214 if (sz > props->max_size) 1215 return TEE_ERROR_NOT_SUPPORTED; 1216 1217 return TEE_SUCCESS; 1218 } 1219 1220 TEE_Result tee_obj_set_type(struct tee_obj *o, uint32_t obj_type, 1221 size_t max_key_size) 1222 { 1223 TEE_Result res = TEE_SUCCESS; 1224 const struct tee_cryp_obj_type_props *type_props; 1225 1226 /* Can only set type for newly allocated objs */ 1227 if (o->attr) 1228 return TEE_ERROR_BAD_STATE; 1229 1230 /* 1231 * Verify that maxKeySize is supported and find out how 1232 * much should be allocated. 1233 */ 1234 1235 if (obj_type == TEE_TYPE_DATA) { 1236 if (max_key_size) 1237 return TEE_ERROR_NOT_SUPPORTED; 1238 } else { 1239 /* Find description of object */ 1240 type_props = tee_svc_find_type_props(obj_type); 1241 if (!type_props) 1242 return TEE_ERROR_NOT_SUPPORTED; 1243 1244 /* Check that max_key_size follows restrictions */ 1245 res = check_key_size(type_props, max_key_size); 1246 if (res) 1247 return res; 1248 1249 o->attr = calloc(1, type_props->alloc_size); 1250 if (!o->attr) 1251 return TEE_ERROR_OUT_OF_MEMORY; 1252 } 1253 1254 /* If we have a key structure, pre-allocate the bignums inside */ 1255 switch (obj_type) { 1256 case TEE_TYPE_RSA_PUBLIC_KEY: 1257 res = crypto_acipher_alloc_rsa_public_key(o->attr, 1258 max_key_size); 1259 break; 1260 case TEE_TYPE_RSA_KEYPAIR: 1261 res = crypto_acipher_alloc_rsa_keypair(o->attr, max_key_size); 1262 break; 1263 case TEE_TYPE_DSA_PUBLIC_KEY: 1264 res = crypto_acipher_alloc_dsa_public_key(o->attr, 1265 max_key_size); 1266 break; 1267 case TEE_TYPE_DSA_KEYPAIR: 1268 res = crypto_acipher_alloc_dsa_keypair(o->attr, max_key_size); 1269 break; 1270 case TEE_TYPE_DH_KEYPAIR: 1271 res = crypto_acipher_alloc_dh_keypair(o->attr, max_key_size); 1272 break; 1273 case TEE_TYPE_ECDSA_PUBLIC_KEY: 1274 case TEE_TYPE_ECDH_PUBLIC_KEY: 1275 case TEE_TYPE_SM2_DSA_PUBLIC_KEY: 1276 case TEE_TYPE_SM2_PKE_PUBLIC_KEY: 1277 case TEE_TYPE_SM2_KEP_PUBLIC_KEY: 1278 res = crypto_acipher_alloc_ecc_public_key(o->attr, obj_type, 1279 max_key_size); 1280 break; 1281 case TEE_TYPE_ECDSA_KEYPAIR: 1282 case TEE_TYPE_ECDH_KEYPAIR: 1283 case TEE_TYPE_SM2_DSA_KEYPAIR: 1284 case TEE_TYPE_SM2_PKE_KEYPAIR: 1285 case TEE_TYPE_SM2_KEP_KEYPAIR: 1286 res = crypto_acipher_alloc_ecc_keypair(o->attr, obj_type, 1287 max_key_size); 1288 break; 1289 default: 1290 if (obj_type != TEE_TYPE_DATA) { 1291 struct tee_cryp_obj_secret *key = o->attr; 1292 1293 key->alloc_size = type_props->alloc_size - 1294 sizeof(*key); 1295 } 1296 break; 1297 } 1298 1299 if (res != TEE_SUCCESS) 1300 return res; 1301 1302 o->info.objectType = obj_type; 1303 o->info.maxKeySize = max_key_size; 1304 o->info.objectUsage = TEE_USAGE_DEFAULT; 1305 1306 return TEE_SUCCESS; 1307 } 1308 1309 TEE_Result syscall_cryp_obj_alloc(unsigned long obj_type, 1310 unsigned long max_key_size, uint32_t *obj) 1311 { 1312 struct ts_session *sess = ts_get_current_session(); 1313 TEE_Result res = TEE_SUCCESS; 1314 struct tee_obj *o = NULL; 1315 1316 1317 o = tee_obj_alloc(); 1318 if (!o) 1319 return TEE_ERROR_OUT_OF_MEMORY; 1320 1321 res = tee_obj_set_type(o, obj_type, max_key_size); 1322 if (res != TEE_SUCCESS) { 1323 tee_obj_free(o); 1324 return res; 1325 } 1326 1327 tee_obj_add(to_user_ta_ctx(sess->ctx), o); 1328 1329 res = copy_kaddr_to_uref(obj, o); 1330 if (res != TEE_SUCCESS) 1331 tee_obj_close(to_user_ta_ctx(sess->ctx), o); 1332 return res; 1333 } 1334 1335 TEE_Result syscall_cryp_obj_close(unsigned long obj) 1336 { 1337 struct ts_session *sess = ts_get_current_session(); 1338 TEE_Result res = TEE_SUCCESS; 1339 struct tee_obj *o = NULL; 1340 1341 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1342 if (res != TEE_SUCCESS) 1343 return res; 1344 1345 /* 1346 * If it's busy it's used by an operation, a client should never have 1347 * this handle. 1348 */ 1349 if (o->busy) 1350 return TEE_ERROR_ITEM_NOT_FOUND; 1351 1352 tee_obj_close(to_user_ta_ctx(sess->ctx), o); 1353 return TEE_SUCCESS; 1354 } 1355 1356 TEE_Result syscall_cryp_obj_reset(unsigned long obj) 1357 { 1358 struct ts_session *sess = ts_get_current_session(); 1359 TEE_Result res = TEE_SUCCESS; 1360 struct tee_obj *o = NULL; 1361 1362 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1363 if (res != TEE_SUCCESS) 1364 return res; 1365 1366 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) == 0) { 1367 tee_obj_attr_clear(o); 1368 o->info.keySize = 0; 1369 o->info.objectUsage = TEE_USAGE_DEFAULT; 1370 } else { 1371 return TEE_ERROR_BAD_PARAMETERS; 1372 } 1373 1374 /* the object is no more initialized */ 1375 o->info.handleFlags &= ~TEE_HANDLE_FLAG_INITIALIZED; 1376 1377 return TEE_SUCCESS; 1378 } 1379 1380 static TEE_Result copy_in_attrs(struct user_ta_ctx *utc, 1381 const struct utee_attribute *usr_attrs, 1382 uint32_t attr_count, TEE_Attribute *attrs) 1383 { 1384 TEE_Result res = TEE_SUCCESS; 1385 size_t size = 0; 1386 uint32_t n = 0; 1387 1388 if (MUL_OVERFLOW(sizeof(struct utee_attribute), attr_count, &size)) 1389 return TEE_ERROR_OVERFLOW; 1390 1391 res = vm_check_access_rights(&utc->uctx, 1392 TEE_MEMORY_ACCESS_READ | 1393 TEE_MEMORY_ACCESS_ANY_OWNER, 1394 (uaddr_t)usr_attrs, size); 1395 if (res != TEE_SUCCESS) 1396 return res; 1397 1398 for (n = 0; n < attr_count; n++) { 1399 attrs[n].attributeID = usr_attrs[n].attribute_id; 1400 if (attrs[n].attributeID & TEE_ATTR_FLAG_VALUE) { 1401 attrs[n].content.value.a = usr_attrs[n].a; 1402 attrs[n].content.value.b = usr_attrs[n].b; 1403 } else { 1404 uintptr_t buf = usr_attrs[n].a; 1405 size_t len = usr_attrs[n].b; 1406 uint32_t flags = TEE_MEMORY_ACCESS_READ | 1407 TEE_MEMORY_ACCESS_ANY_OWNER; 1408 1409 res = vm_check_access_rights(&utc->uctx, flags, buf, 1410 len); 1411 if (res != TEE_SUCCESS) 1412 return res; 1413 attrs[n].content.ref.buffer = (void *)buf; 1414 attrs[n].content.ref.length = len; 1415 } 1416 } 1417 1418 return TEE_SUCCESS; 1419 } 1420 1421 enum attr_usage { 1422 ATTR_USAGE_POPULATE, 1423 ATTR_USAGE_GENERATE_KEY 1424 }; 1425 1426 static TEE_Result tee_svc_cryp_check_attr(enum attr_usage usage, 1427 const struct tee_cryp_obj_type_props 1428 *type_props, 1429 const TEE_Attribute *attrs, 1430 uint32_t attr_count) 1431 { 1432 uint32_t required_flag = 0; 1433 uint32_t opt_flag = 0; 1434 bool all_opt_needed = false; 1435 uint32_t req_attrs = 0; 1436 uint32_t opt_grp_attrs = 0; 1437 uint32_t attrs_found = 0; 1438 size_t n = 0; 1439 uint32_t bit = 0; 1440 uint32_t flags = 0; 1441 int idx = 0; 1442 1443 if (usage == ATTR_USAGE_POPULATE) { 1444 required_flag = TEE_TYPE_ATTR_REQUIRED; 1445 opt_flag = TEE_TYPE_ATTR_OPTIONAL_GROUP; 1446 all_opt_needed = true; 1447 } else { 1448 required_flag = TEE_TYPE_ATTR_GEN_KEY_REQ; 1449 opt_flag = TEE_TYPE_ATTR_GEN_KEY_OPT; 1450 all_opt_needed = false; 1451 } 1452 1453 /* 1454 * First find out which attributes are required and which belong to 1455 * the optional group 1456 */ 1457 for (n = 0; n < type_props->num_type_attrs; n++) { 1458 bit = 1 << n; 1459 flags = type_props->type_attrs[n].flags; 1460 1461 if (flags & required_flag) 1462 req_attrs |= bit; 1463 else if (flags & opt_flag) 1464 opt_grp_attrs |= bit; 1465 } 1466 1467 /* 1468 * Verify that all required attributes are in place and 1469 * that the same attribute isn't repeated. 1470 */ 1471 for (n = 0; n < attr_count; n++) { 1472 idx = tee_svc_cryp_obj_find_type_attr_idx( 1473 attrs[n].attributeID, 1474 type_props); 1475 1476 /* attribute not defined in current object type */ 1477 if (idx < 0) 1478 return TEE_ERROR_ITEM_NOT_FOUND; 1479 1480 bit = 1 << idx; 1481 1482 /* attribute not repeated */ 1483 if ((attrs_found & bit) != 0) 1484 return TEE_ERROR_ITEM_NOT_FOUND; 1485 1486 /* 1487 * Attribute not defined in current object type for this 1488 * usage. 1489 */ 1490 if (!(bit & (req_attrs | opt_grp_attrs))) 1491 return TEE_ERROR_ITEM_NOT_FOUND; 1492 1493 attrs_found |= bit; 1494 } 1495 /* Required attribute missing */ 1496 if ((attrs_found & req_attrs) != req_attrs) 1497 return TEE_ERROR_ITEM_NOT_FOUND; 1498 1499 /* 1500 * If the flag says that "if one of the optional attributes are included 1501 * all of them has to be included" this must be checked. 1502 */ 1503 if (all_opt_needed && (attrs_found & opt_grp_attrs) != 0 && 1504 (attrs_found & opt_grp_attrs) != opt_grp_attrs) 1505 return TEE_ERROR_ITEM_NOT_FOUND; 1506 1507 return TEE_SUCCESS; 1508 } 1509 1510 static TEE_Result get_ec_key_size(uint32_t curve, size_t *key_size) 1511 { 1512 switch (curve) { 1513 case TEE_ECC_CURVE_NIST_P192: 1514 *key_size = 192; 1515 break; 1516 case TEE_ECC_CURVE_NIST_P224: 1517 *key_size = 224; 1518 break; 1519 case TEE_ECC_CURVE_NIST_P256: 1520 *key_size = 256; 1521 break; 1522 case TEE_ECC_CURVE_NIST_P384: 1523 *key_size = 384; 1524 break; 1525 case TEE_ECC_CURVE_NIST_P521: 1526 *key_size = 521; 1527 break; 1528 case TEE_ECC_CURVE_SM2: 1529 *key_size = 256; 1530 break; 1531 default: 1532 return TEE_ERROR_NOT_SUPPORTED; 1533 } 1534 1535 return TEE_SUCCESS; 1536 } 1537 1538 static size_t get_used_bits(const TEE_Attribute *a) 1539 { 1540 int nbits = a->content.ref.length * 8; 1541 int v = 0; 1542 1543 bit_ffs(a->content.ref.buffer, nbits, &v); 1544 return nbits - v; 1545 } 1546 1547 static TEE_Result tee_svc_cryp_obj_populate_type( 1548 struct tee_obj *o, 1549 const struct tee_cryp_obj_type_props *type_props, 1550 const TEE_Attribute *attrs, 1551 uint32_t attr_count) 1552 { 1553 TEE_Result res = TEE_SUCCESS; 1554 uint32_t have_attrs = 0; 1555 size_t obj_size = 0; 1556 size_t n = 0; 1557 int idx = 0; 1558 const struct attr_ops *ops = NULL; 1559 void *attr = NULL; 1560 1561 for (n = 0; n < attr_count; n++) { 1562 idx = tee_svc_cryp_obj_find_type_attr_idx( 1563 attrs[n].attributeID, 1564 type_props); 1565 /* attribute not defined in current object type */ 1566 if (idx < 0) 1567 return TEE_ERROR_ITEM_NOT_FOUND; 1568 1569 have_attrs |= BIT32(idx); 1570 ops = attr_ops + type_props->type_attrs[idx].ops_index; 1571 attr = (uint8_t *)o->attr + 1572 type_props->type_attrs[idx].raw_offs; 1573 if (attrs[n].attributeID & TEE_ATTR_FLAG_VALUE) 1574 res = ops->from_user(attr, &attrs[n].content.value, 1575 sizeof(attrs[n].content.value)); 1576 else 1577 res = ops->from_user(attr, attrs[n].content.ref.buffer, 1578 attrs[n].content.ref.length); 1579 if (res != TEE_SUCCESS) 1580 return res; 1581 1582 /* 1583 * The attribute that gives the size of the object is 1584 * flagged with TEE_TYPE_ATTR_SIZE_INDICATOR. 1585 */ 1586 if (type_props->type_attrs[idx].flags & 1587 TEE_TYPE_ATTR_SIZE_INDICATOR) { 1588 /* There should be only one */ 1589 if (obj_size) 1590 return TEE_ERROR_BAD_STATE; 1591 1592 /* 1593 * For ECDSA/ECDH we need to translate curve into 1594 * object size 1595 */ 1596 if (attrs[n].attributeID == TEE_ATTR_ECC_CURVE) { 1597 res = get_ec_key_size(attrs[n].content.value.a, 1598 &obj_size); 1599 if (res != TEE_SUCCESS) 1600 return res; 1601 } else { 1602 TEE_ObjectType obj_type = o->info.objectType; 1603 size_t sz = o->info.maxKeySize; 1604 1605 obj_size = attrs[n].content.ref.length * 8; 1606 /* Drop the parity bits for legacy objects */ 1607 if (is_gp_legacy_des_key_size(obj_type, sz)) 1608 obj_size -= obj_size / 8; 1609 } 1610 if (obj_size > o->info.maxKeySize) 1611 return TEE_ERROR_BAD_STATE; 1612 } 1613 1614 /* 1615 * Bignum attributes limited by the number of bits in 1616 * o->info.keySize are flagged with 1617 * TEE_TYPE_ATTR_BIGNUM_MAXBITS. 1618 */ 1619 if (type_props->type_attrs[idx].flags & 1620 TEE_TYPE_ATTR_BIGNUM_MAXBITS) { 1621 if (get_used_bits(attrs + n) > o->info.maxKeySize) 1622 return TEE_ERROR_BAD_STATE; 1623 } 1624 } 1625 1626 o->have_attrs = have_attrs; 1627 o->info.keySize = obj_size; 1628 /* 1629 * In GP Internal API Specification 1.0 the partity bits aren't 1630 * counted when telling the size of the key in bits so remove the 1631 * parity bits here. 1632 */ 1633 if (is_gp_legacy_des_key_size(o->info.objectType, o->info.maxKeySize)) 1634 o->info.keySize -= o->info.keySize / 8; 1635 1636 return TEE_SUCCESS; 1637 } 1638 1639 TEE_Result syscall_cryp_obj_populate(unsigned long obj, 1640 struct utee_attribute *usr_attrs, 1641 unsigned long attr_count) 1642 { 1643 struct ts_session *sess = ts_get_current_session(); 1644 TEE_Result res = TEE_SUCCESS; 1645 struct tee_obj *o = NULL; 1646 const struct tee_cryp_obj_type_props *type_props = NULL; 1647 TEE_Attribute *attrs = NULL; 1648 size_t alloc_size = 0; 1649 1650 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1651 if (res != TEE_SUCCESS) 1652 return res; 1653 1654 /* Must be a transient object */ 1655 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 1656 return TEE_ERROR_BAD_PARAMETERS; 1657 1658 /* Must not be initialized already */ 1659 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1660 return TEE_ERROR_BAD_PARAMETERS; 1661 1662 type_props = tee_svc_find_type_props(o->info.objectType); 1663 if (!type_props) 1664 return TEE_ERROR_NOT_IMPLEMENTED; 1665 1666 if (MUL_OVERFLOW(sizeof(TEE_Attribute), attr_count, &alloc_size)) 1667 return TEE_ERROR_OVERFLOW; 1668 1669 attrs = malloc(alloc_size); 1670 if (!attrs) 1671 return TEE_ERROR_OUT_OF_MEMORY; 1672 1673 res = copy_in_attrs(to_user_ta_ctx(sess->ctx), usr_attrs, attr_count, 1674 attrs); 1675 if (res != TEE_SUCCESS) 1676 goto out; 1677 1678 res = tee_svc_cryp_check_attr(ATTR_USAGE_POPULATE, type_props, 1679 attrs, attr_count); 1680 if (res != TEE_SUCCESS) 1681 goto out; 1682 1683 res = tee_svc_cryp_obj_populate_type(o, type_props, attrs, attr_count); 1684 if (res == TEE_SUCCESS) 1685 o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 1686 1687 out: 1688 free_wipe(attrs); 1689 return res; 1690 } 1691 1692 TEE_Result syscall_cryp_obj_copy(unsigned long dst, unsigned long src) 1693 { 1694 struct ts_session *sess = ts_get_current_session(); 1695 TEE_Result res = TEE_SUCCESS; 1696 struct tee_obj *dst_o = NULL; 1697 struct tee_obj *src_o = NULL; 1698 1699 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 1700 uref_to_vaddr(dst), &dst_o); 1701 if (res != TEE_SUCCESS) 1702 return res; 1703 1704 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 1705 uref_to_vaddr(src), &src_o); 1706 if (res != TEE_SUCCESS) 1707 return res; 1708 1709 if ((src_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 1710 return TEE_ERROR_BAD_PARAMETERS; 1711 if ((dst_o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 1712 return TEE_ERROR_BAD_PARAMETERS; 1713 if ((dst_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1714 return TEE_ERROR_BAD_PARAMETERS; 1715 1716 res = tee_obj_attr_copy_from(dst_o, src_o); 1717 if (res != TEE_SUCCESS) 1718 return res; 1719 1720 dst_o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 1721 dst_o->info.keySize = src_o->info.keySize; 1722 dst_o->info.objectUsage = src_o->info.objectUsage; 1723 return TEE_SUCCESS; 1724 } 1725 1726 static TEE_Result check_pub_rsa_key(struct bignum *e) 1727 { 1728 size_t n = crypto_bignum_num_bytes(e); 1729 uint8_t bin_key[256 / 8] = { 0 }; 1730 1731 /* 1732 * NIST SP800-56B requires public RSA key to be an odd integer in 1733 * the range 65537 <= e < 2^256. 1734 */ 1735 1736 if (n > sizeof(bin_key) || n < 3) 1737 return TEE_ERROR_BAD_PARAMETERS; 1738 1739 crypto_bignum_bn2bin(e, bin_key); 1740 1741 if (!(bin_key[n - 1] & 1)) /* key must be odd */ 1742 return TEE_ERROR_BAD_PARAMETERS; 1743 1744 if (n == 3) { 1745 uint32_t key = 0; 1746 1747 for (n = 0; n < 3; n++) { 1748 key <<= 8; 1749 key |= bin_key[n]; 1750 } 1751 1752 if (key < 65537) 1753 return TEE_ERROR_BAD_PARAMETERS; 1754 } 1755 1756 /* key is larger than 65537 */ 1757 return TEE_SUCCESS; 1758 } 1759 1760 static TEE_Result tee_svc_obj_generate_key_rsa( 1761 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 1762 uint32_t key_size, 1763 const TEE_Attribute *params, uint32_t param_count) 1764 { 1765 TEE_Result res = TEE_SUCCESS; 1766 struct rsa_keypair *key = o->attr; 1767 uint32_t e = TEE_U32_TO_BIG_ENDIAN(65537); 1768 1769 /* Copy the present attributes into the obj before starting */ 1770 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 1771 param_count); 1772 if (res != TEE_SUCCESS) 1773 return res; 1774 if (get_attribute(o, type_props, TEE_ATTR_RSA_PUBLIC_EXPONENT)) { 1775 res = check_pub_rsa_key(key->e); 1776 if (res) 1777 return res; 1778 } else { 1779 crypto_bignum_bin2bn((const uint8_t *)&e, sizeof(e), key->e); 1780 } 1781 res = crypto_acipher_gen_rsa_key(key, key_size); 1782 if (res != TEE_SUCCESS) 1783 return res; 1784 1785 /* Set bits for all known attributes for this object type */ 1786 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 1787 1788 return TEE_SUCCESS; 1789 } 1790 1791 static TEE_Result tee_svc_obj_generate_key_dsa( 1792 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 1793 uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) 1794 { 1795 TEE_Result res; 1796 1797 /* Copy the present attributes into the obj before starting */ 1798 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 1799 param_count); 1800 if (res != TEE_SUCCESS) 1801 return res; 1802 1803 res = crypto_acipher_gen_dsa_key(o->attr, key_size); 1804 if (res != TEE_SUCCESS) 1805 return res; 1806 1807 /* Set bits for all known attributes for this object type */ 1808 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 1809 1810 return TEE_SUCCESS; 1811 } 1812 1813 static TEE_Result tee_svc_obj_generate_key_dh( 1814 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 1815 uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) 1816 { 1817 TEE_Result res; 1818 struct dh_keypair *tee_dh_key; 1819 struct bignum *dh_q = NULL; 1820 uint32_t dh_xbits = 0; 1821 1822 /* Copy the present attributes into the obj before starting */ 1823 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 1824 param_count); 1825 if (res != TEE_SUCCESS) 1826 return res; 1827 1828 tee_dh_key = (struct dh_keypair *)o->attr; 1829 1830 if (get_attribute(o, type_props, TEE_ATTR_DH_SUBPRIME)) 1831 dh_q = tee_dh_key->q; 1832 if (get_attribute(o, type_props, TEE_ATTR_DH_X_BITS)) 1833 dh_xbits = tee_dh_key->xbits; 1834 res = crypto_acipher_gen_dh_key(tee_dh_key, dh_q, dh_xbits, key_size); 1835 if (res != TEE_SUCCESS) 1836 return res; 1837 1838 /* Set bits for the generated public and private key */ 1839 set_attribute(o, type_props, TEE_ATTR_DH_PUBLIC_VALUE); 1840 set_attribute(o, type_props, TEE_ATTR_DH_PRIVATE_VALUE); 1841 set_attribute(o, type_props, TEE_ATTR_DH_X_BITS); 1842 return TEE_SUCCESS; 1843 } 1844 1845 static TEE_Result tee_svc_obj_generate_key_ecc( 1846 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 1847 uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) 1848 { 1849 TEE_Result res; 1850 struct ecc_keypair *tee_ecc_key; 1851 1852 /* Copy the present attributes into the obj before starting */ 1853 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 1854 param_count); 1855 if (res != TEE_SUCCESS) 1856 return res; 1857 1858 tee_ecc_key = (struct ecc_keypair *)o->attr; 1859 1860 res = crypto_acipher_gen_ecc_key(tee_ecc_key, key_size); 1861 if (res != TEE_SUCCESS) 1862 return res; 1863 1864 /* Set bits for the generated public and private key */ 1865 set_attribute(o, type_props, TEE_ATTR_ECC_PRIVATE_VALUE); 1866 set_attribute(o, type_props, TEE_ATTR_ECC_PUBLIC_VALUE_X); 1867 set_attribute(o, type_props, TEE_ATTR_ECC_PUBLIC_VALUE_Y); 1868 set_attribute(o, type_props, TEE_ATTR_ECC_CURVE); 1869 return TEE_SUCCESS; 1870 } 1871 1872 TEE_Result syscall_obj_generate_key(unsigned long obj, unsigned long key_size, 1873 const struct utee_attribute *usr_params, 1874 unsigned long param_count) 1875 { 1876 struct ts_session *sess = ts_get_current_session(); 1877 TEE_Result res = TEE_SUCCESS; 1878 const struct tee_cryp_obj_type_props *type_props = NULL; 1879 struct tee_obj *o = NULL; 1880 struct tee_cryp_obj_secret *key = NULL; 1881 size_t byte_size = 0; 1882 TEE_Attribute *params = NULL; 1883 size_t alloc_size = 0; 1884 1885 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1886 if (res != TEE_SUCCESS) 1887 return res; 1888 1889 /* Must be a transient object */ 1890 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 1891 return TEE_ERROR_BAD_STATE; 1892 1893 /* Must not be initialized already */ 1894 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1895 return TEE_ERROR_BAD_STATE; 1896 1897 /* Find description of object */ 1898 type_props = tee_svc_find_type_props(o->info.objectType); 1899 if (!type_props) 1900 return TEE_ERROR_NOT_SUPPORTED; 1901 1902 /* Check that key_size follows restrictions */ 1903 res = check_key_size(type_props, key_size); 1904 if (res) 1905 return res; 1906 1907 if (MUL_OVERFLOW(sizeof(TEE_Attribute), param_count, &alloc_size)) 1908 return TEE_ERROR_OVERFLOW; 1909 1910 params = malloc(alloc_size); 1911 if (!params) 1912 return TEE_ERROR_OUT_OF_MEMORY; 1913 res = copy_in_attrs(to_user_ta_ctx(sess->ctx), usr_params, param_count, 1914 params); 1915 if (res != TEE_SUCCESS) 1916 goto out; 1917 1918 res = tee_svc_cryp_check_attr(ATTR_USAGE_GENERATE_KEY, type_props, 1919 params, param_count); 1920 if (res != TEE_SUCCESS) 1921 goto out; 1922 1923 switch (o->info.objectType) { 1924 case TEE_TYPE_AES: 1925 case TEE_TYPE_DES: 1926 case TEE_TYPE_DES3: 1927 case TEE_TYPE_SM4: 1928 case TEE_TYPE_HMAC_MD5: 1929 case TEE_TYPE_HMAC_SHA1: 1930 case TEE_TYPE_HMAC_SHA224: 1931 case TEE_TYPE_HMAC_SHA256: 1932 case TEE_TYPE_HMAC_SHA384: 1933 case TEE_TYPE_HMAC_SHA512: 1934 case TEE_TYPE_HMAC_SM3: 1935 case TEE_TYPE_GENERIC_SECRET: 1936 byte_size = key_size / 8; 1937 1938 /* 1939 * In GP Internal API Specification 1.0 the partity bits 1940 * aren't counted when telling the size of the key in bits. 1941 */ 1942 if (is_gp_legacy_des_key_size(o->info.objectType, key_size)) 1943 byte_size = (key_size + key_size / 7) / 8; 1944 1945 key = (struct tee_cryp_obj_secret *)o->attr; 1946 if (byte_size > key->alloc_size) { 1947 res = TEE_ERROR_EXCESS_DATA; 1948 goto out; 1949 } 1950 1951 res = crypto_rng_read((void *)(key + 1), byte_size); 1952 if (res != TEE_SUCCESS) 1953 goto out; 1954 1955 key->key_size = byte_size; 1956 1957 /* Set bits for all known attributes for this object type */ 1958 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 1959 1960 break; 1961 1962 case TEE_TYPE_RSA_KEYPAIR: 1963 res = tee_svc_obj_generate_key_rsa(o, type_props, key_size, 1964 params, param_count); 1965 if (res != TEE_SUCCESS) 1966 goto out; 1967 break; 1968 1969 case TEE_TYPE_DSA_KEYPAIR: 1970 res = tee_svc_obj_generate_key_dsa(o, type_props, key_size, 1971 params, param_count); 1972 if (res != TEE_SUCCESS) 1973 goto out; 1974 break; 1975 1976 case TEE_TYPE_DH_KEYPAIR: 1977 res = tee_svc_obj_generate_key_dh(o, type_props, key_size, 1978 params, param_count); 1979 if (res != TEE_SUCCESS) 1980 goto out; 1981 break; 1982 1983 case TEE_TYPE_ECDSA_KEYPAIR: 1984 case TEE_TYPE_ECDH_KEYPAIR: 1985 case TEE_TYPE_SM2_PKE_KEYPAIR: 1986 res = tee_svc_obj_generate_key_ecc(o, type_props, key_size, 1987 params, param_count); 1988 if (res != TEE_SUCCESS) 1989 goto out; 1990 break; 1991 1992 default: 1993 res = TEE_ERROR_BAD_FORMAT; 1994 } 1995 1996 out: 1997 free_wipe(params); 1998 if (res == TEE_SUCCESS) { 1999 o->info.keySize = key_size; 2000 o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 2001 } 2002 return res; 2003 } 2004 2005 static TEE_Result tee_svc_cryp_get_state(struct ts_session *sess, 2006 vaddr_t state_id, 2007 struct tee_cryp_state **state) 2008 { 2009 struct tee_cryp_state *s; 2010 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 2011 2012 TAILQ_FOREACH(s, &utc->cryp_states, link) { 2013 if (state_id == (vaddr_t)s) { 2014 *state = s; 2015 return TEE_SUCCESS; 2016 } 2017 } 2018 return TEE_ERROR_BAD_PARAMETERS; 2019 } 2020 2021 static void cryp_state_free(struct user_ta_ctx *utc, struct tee_cryp_state *cs) 2022 { 2023 struct tee_obj *o; 2024 2025 if (tee_obj_get(utc, cs->key1, &o) == TEE_SUCCESS) 2026 tee_obj_close(utc, o); 2027 if (tee_obj_get(utc, cs->key2, &o) == TEE_SUCCESS) 2028 tee_obj_close(utc, o); 2029 2030 TAILQ_REMOVE(&utc->cryp_states, cs, link); 2031 if (cs->ctx_finalize != NULL) 2032 cs->ctx_finalize(cs->ctx); 2033 2034 switch (TEE_ALG_GET_CLASS(cs->algo)) { 2035 case TEE_OPERATION_CIPHER: 2036 crypto_cipher_free_ctx(cs->ctx); 2037 break; 2038 case TEE_OPERATION_AE: 2039 crypto_authenc_free_ctx(cs->ctx); 2040 break; 2041 case TEE_OPERATION_DIGEST: 2042 crypto_hash_free_ctx(cs->ctx); 2043 break; 2044 case TEE_OPERATION_MAC: 2045 crypto_mac_free_ctx(cs->ctx); 2046 break; 2047 default: 2048 assert(!cs->ctx); 2049 } 2050 2051 free(cs); 2052 } 2053 2054 static TEE_Result tee_svc_cryp_check_key_type(const struct tee_obj *o, 2055 uint32_t algo, 2056 TEE_OperationMode mode) 2057 { 2058 uint32_t req_key_type; 2059 uint32_t req_key_type2 = 0; 2060 2061 switch (TEE_ALG_GET_MAIN_ALG(algo)) { 2062 case TEE_MAIN_ALGO_MD5: 2063 req_key_type = TEE_TYPE_HMAC_MD5; 2064 break; 2065 case TEE_MAIN_ALGO_SHA1: 2066 req_key_type = TEE_TYPE_HMAC_SHA1; 2067 break; 2068 case TEE_MAIN_ALGO_SHA224: 2069 req_key_type = TEE_TYPE_HMAC_SHA224; 2070 break; 2071 case TEE_MAIN_ALGO_SHA256: 2072 req_key_type = TEE_TYPE_HMAC_SHA256; 2073 break; 2074 case TEE_MAIN_ALGO_SHA384: 2075 req_key_type = TEE_TYPE_HMAC_SHA384; 2076 break; 2077 case TEE_MAIN_ALGO_SHA512: 2078 req_key_type = TEE_TYPE_HMAC_SHA512; 2079 break; 2080 case TEE_MAIN_ALGO_SM3: 2081 req_key_type = TEE_TYPE_HMAC_SM3; 2082 break; 2083 case TEE_MAIN_ALGO_AES: 2084 req_key_type = TEE_TYPE_AES; 2085 break; 2086 case TEE_MAIN_ALGO_DES: 2087 req_key_type = TEE_TYPE_DES; 2088 break; 2089 case TEE_MAIN_ALGO_DES3: 2090 req_key_type = TEE_TYPE_DES3; 2091 break; 2092 case TEE_MAIN_ALGO_SM4: 2093 req_key_type = TEE_TYPE_SM4; 2094 break; 2095 case TEE_MAIN_ALGO_RSA: 2096 req_key_type = TEE_TYPE_RSA_KEYPAIR; 2097 if (mode == TEE_MODE_ENCRYPT || mode == TEE_MODE_VERIFY) 2098 req_key_type2 = TEE_TYPE_RSA_PUBLIC_KEY; 2099 break; 2100 case TEE_MAIN_ALGO_DSA: 2101 req_key_type = TEE_TYPE_DSA_KEYPAIR; 2102 if (mode == TEE_MODE_ENCRYPT || mode == TEE_MODE_VERIFY) 2103 req_key_type2 = TEE_TYPE_DSA_PUBLIC_KEY; 2104 break; 2105 case TEE_MAIN_ALGO_DH: 2106 req_key_type = TEE_TYPE_DH_KEYPAIR; 2107 break; 2108 case TEE_MAIN_ALGO_ECDSA: 2109 req_key_type = TEE_TYPE_ECDSA_KEYPAIR; 2110 if (mode == TEE_MODE_VERIFY) 2111 req_key_type2 = TEE_TYPE_ECDSA_PUBLIC_KEY; 2112 break; 2113 case TEE_MAIN_ALGO_ECDH: 2114 req_key_type = TEE_TYPE_ECDH_KEYPAIR; 2115 break; 2116 case TEE_MAIN_ALGO_SM2_PKE: 2117 if (mode == TEE_MODE_ENCRYPT) 2118 req_key_type = TEE_TYPE_SM2_PKE_PUBLIC_KEY; 2119 else 2120 req_key_type = TEE_TYPE_SM2_PKE_KEYPAIR; 2121 break; 2122 case TEE_MAIN_ALGO_SM2_DSA_SM3: 2123 if (mode == TEE_MODE_VERIFY) 2124 req_key_type = TEE_TYPE_SM2_DSA_PUBLIC_KEY; 2125 else 2126 req_key_type = TEE_TYPE_SM2_DSA_KEYPAIR; 2127 break; 2128 #if defined(CFG_CRYPTO_SM2_KEP) 2129 case TEE_MAIN_ALGO_SM2_KEP: 2130 req_key_type = TEE_TYPE_SM2_KEP_KEYPAIR; 2131 req_key_type2 = TEE_TYPE_SM2_KEP_PUBLIC_KEY; 2132 break; 2133 #endif 2134 #if defined(CFG_CRYPTO_HKDF) 2135 case TEE_MAIN_ALGO_HKDF: 2136 req_key_type = TEE_TYPE_HKDF_IKM; 2137 break; 2138 #endif 2139 #if defined(CFG_CRYPTO_CONCAT_KDF) 2140 case TEE_MAIN_ALGO_CONCAT_KDF: 2141 req_key_type = TEE_TYPE_CONCAT_KDF_Z; 2142 break; 2143 #endif 2144 #if defined(CFG_CRYPTO_PBKDF2) 2145 case TEE_MAIN_ALGO_PBKDF2: 2146 req_key_type = TEE_TYPE_PBKDF2_PASSWORD; 2147 break; 2148 #endif 2149 default: 2150 return TEE_ERROR_BAD_PARAMETERS; 2151 } 2152 2153 if (req_key_type != o->info.objectType && 2154 req_key_type2 != o->info.objectType) 2155 return TEE_ERROR_BAD_PARAMETERS; 2156 return TEE_SUCCESS; 2157 } 2158 2159 TEE_Result syscall_cryp_state_alloc(unsigned long algo, unsigned long mode, 2160 unsigned long key1, unsigned long key2, 2161 uint32_t *state) 2162 { 2163 struct ts_session *sess = ts_get_current_session(); 2164 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 2165 TEE_Result res = TEE_SUCCESS; 2166 struct tee_cryp_state *cs = NULL; 2167 struct tee_obj *o1 = NULL; 2168 struct tee_obj *o2 = NULL; 2169 2170 if (key1 != 0) { 2171 res = tee_obj_get(utc, uref_to_vaddr(key1), &o1); 2172 if (res != TEE_SUCCESS) 2173 return res; 2174 if (o1->busy) 2175 return TEE_ERROR_BAD_PARAMETERS; 2176 res = tee_svc_cryp_check_key_type(o1, algo, mode); 2177 if (res != TEE_SUCCESS) 2178 return res; 2179 } 2180 if (key2 != 0) { 2181 res = tee_obj_get(utc, uref_to_vaddr(key2), &o2); 2182 if (res != TEE_SUCCESS) 2183 return res; 2184 if (o2->busy) 2185 return TEE_ERROR_BAD_PARAMETERS; 2186 res = tee_svc_cryp_check_key_type(o2, algo, mode); 2187 if (res != TEE_SUCCESS) 2188 return res; 2189 } 2190 2191 cs = calloc(1, sizeof(struct tee_cryp_state)); 2192 if (!cs) 2193 return TEE_ERROR_OUT_OF_MEMORY; 2194 TAILQ_INSERT_TAIL(&utc->cryp_states, cs, link); 2195 cs->algo = algo; 2196 cs->mode = mode; 2197 cs->state = CRYP_STATE_UNINITIALIZED; 2198 2199 switch (TEE_ALG_GET_CLASS(algo)) { 2200 case TEE_OPERATION_CIPHER: 2201 if ((algo == TEE_ALG_AES_XTS && (key1 == 0 || key2 == 0)) || 2202 (algo != TEE_ALG_AES_XTS && (key1 == 0 || key2 != 0))) { 2203 res = TEE_ERROR_BAD_PARAMETERS; 2204 } else { 2205 res = crypto_cipher_alloc_ctx(&cs->ctx, algo); 2206 if (res != TEE_SUCCESS) 2207 break; 2208 } 2209 break; 2210 case TEE_OPERATION_AE: 2211 if (key1 == 0 || key2 != 0) { 2212 res = TEE_ERROR_BAD_PARAMETERS; 2213 } else { 2214 res = crypto_authenc_alloc_ctx(&cs->ctx, algo); 2215 if (res != TEE_SUCCESS) 2216 break; 2217 } 2218 break; 2219 case TEE_OPERATION_MAC: 2220 if (key1 == 0 || key2 != 0) { 2221 res = TEE_ERROR_BAD_PARAMETERS; 2222 } else { 2223 res = crypto_mac_alloc_ctx(&cs->ctx, algo); 2224 if (res != TEE_SUCCESS) 2225 break; 2226 } 2227 break; 2228 case TEE_OPERATION_DIGEST: 2229 if (key1 != 0 || key2 != 0) { 2230 res = TEE_ERROR_BAD_PARAMETERS; 2231 } else { 2232 res = crypto_hash_alloc_ctx(&cs->ctx, algo); 2233 if (res != TEE_SUCCESS) 2234 break; 2235 } 2236 break; 2237 case TEE_OPERATION_ASYMMETRIC_CIPHER: 2238 case TEE_OPERATION_ASYMMETRIC_SIGNATURE: 2239 if (algo == TEE_ALG_RSASSA_PKCS1_V1_5 && 2240 !IS_ENABLED(CFG_CRYPTO_RSASSA_NA1)) { 2241 res = TEE_ERROR_NOT_SUPPORTED; 2242 break; 2243 } 2244 if (key1 == 0 || key2 != 0) 2245 res = TEE_ERROR_BAD_PARAMETERS; 2246 break; 2247 case TEE_OPERATION_KEY_DERIVATION: 2248 if (algo == TEE_ALG_SM2_KEP) { 2249 if (key1 == 0 || key2 == 0) 2250 res = TEE_ERROR_BAD_PARAMETERS; 2251 } else { 2252 if (key1 == 0 || key2 != 0) 2253 res = TEE_ERROR_BAD_PARAMETERS; 2254 } 2255 break; 2256 default: 2257 res = TEE_ERROR_NOT_SUPPORTED; 2258 break; 2259 } 2260 if (res != TEE_SUCCESS) 2261 goto out; 2262 2263 res = copy_kaddr_to_uref(state, cs); 2264 if (res != TEE_SUCCESS) 2265 goto out; 2266 2267 /* Register keys */ 2268 if (o1 != NULL) { 2269 o1->busy = true; 2270 cs->key1 = (vaddr_t)o1; 2271 } 2272 if (o2 != NULL) { 2273 o2->busy = true; 2274 cs->key2 = (vaddr_t)o2; 2275 } 2276 2277 out: 2278 if (res != TEE_SUCCESS) 2279 cryp_state_free(utc, cs); 2280 return res; 2281 } 2282 2283 TEE_Result syscall_cryp_state_copy(unsigned long dst, unsigned long src) 2284 { 2285 struct ts_session *sess = ts_get_current_session(); 2286 TEE_Result res = TEE_SUCCESS; 2287 struct tee_cryp_state *cs_dst = NULL; 2288 struct tee_cryp_state *cs_src = NULL; 2289 2290 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(dst), &cs_dst); 2291 if (res != TEE_SUCCESS) 2292 return res; 2293 2294 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(src), &cs_src); 2295 if (res != TEE_SUCCESS) 2296 return res; 2297 if (cs_dst->algo != cs_src->algo || cs_dst->mode != cs_src->mode) 2298 return TEE_ERROR_BAD_PARAMETERS; 2299 2300 switch (TEE_ALG_GET_CLASS(cs_src->algo)) { 2301 case TEE_OPERATION_CIPHER: 2302 crypto_cipher_copy_state(cs_dst->ctx, cs_src->ctx); 2303 break; 2304 case TEE_OPERATION_AE: 2305 crypto_authenc_copy_state(cs_dst->ctx, cs_src->ctx); 2306 break; 2307 case TEE_OPERATION_DIGEST: 2308 crypto_hash_copy_state(cs_dst->ctx, cs_src->ctx); 2309 break; 2310 case TEE_OPERATION_MAC: 2311 crypto_mac_copy_state(cs_dst->ctx, cs_src->ctx); 2312 break; 2313 default: 2314 return TEE_ERROR_BAD_STATE; 2315 } 2316 2317 cs_dst->state = cs_src->state; 2318 cs_dst->ctx_finalize = cs_src->ctx_finalize; 2319 2320 return TEE_SUCCESS; 2321 } 2322 2323 void tee_svc_cryp_free_states(struct user_ta_ctx *utc) 2324 { 2325 struct tee_cryp_state_head *states = &utc->cryp_states; 2326 2327 while (!TAILQ_EMPTY(states)) 2328 cryp_state_free(utc, TAILQ_FIRST(states)); 2329 } 2330 2331 TEE_Result syscall_cryp_state_free(unsigned long state) 2332 { 2333 struct ts_session *sess = ts_get_current_session(); 2334 TEE_Result res = TEE_SUCCESS; 2335 struct tee_cryp_state *cs = NULL; 2336 2337 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2338 if (res != TEE_SUCCESS) 2339 return res; 2340 cryp_state_free(to_user_ta_ctx(sess->ctx), cs); 2341 return TEE_SUCCESS; 2342 } 2343 2344 TEE_Result syscall_hash_init(unsigned long state, 2345 const void *iv __maybe_unused, 2346 size_t iv_len __maybe_unused) 2347 { 2348 struct ts_session *sess = ts_get_current_session(); 2349 TEE_Result res = TEE_SUCCESS; 2350 struct tee_cryp_state *cs = NULL; 2351 2352 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2353 if (res != TEE_SUCCESS) 2354 return res; 2355 2356 switch (TEE_ALG_GET_CLASS(cs->algo)) { 2357 case TEE_OPERATION_DIGEST: 2358 res = crypto_hash_init(cs->ctx); 2359 if (res != TEE_SUCCESS) 2360 return res; 2361 break; 2362 case TEE_OPERATION_MAC: 2363 { 2364 struct tee_obj *o; 2365 struct tee_cryp_obj_secret *key; 2366 2367 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 2368 cs->key1, &o); 2369 if (res != TEE_SUCCESS) 2370 return res; 2371 if ((o->info.handleFlags & 2372 TEE_HANDLE_FLAG_INITIALIZED) == 0) 2373 return TEE_ERROR_BAD_PARAMETERS; 2374 2375 key = (struct tee_cryp_obj_secret *)o->attr; 2376 res = crypto_mac_init(cs->ctx, (void *)(key + 1), 2377 key->key_size); 2378 if (res != TEE_SUCCESS) 2379 return res; 2380 break; 2381 } 2382 default: 2383 return TEE_ERROR_BAD_PARAMETERS; 2384 } 2385 2386 cs->state = CRYP_STATE_INITIALIZED; 2387 2388 return TEE_SUCCESS; 2389 } 2390 2391 TEE_Result syscall_hash_update(unsigned long state, const void *chunk, 2392 size_t chunk_size) 2393 { 2394 struct ts_session *sess = ts_get_current_session(); 2395 struct tee_cryp_state *cs = NULL; 2396 TEE_Result res = TEE_SUCCESS; 2397 2398 /* No data, but size provided isn't valid parameters. */ 2399 if (!chunk && chunk_size) 2400 return TEE_ERROR_BAD_PARAMETERS; 2401 2402 /* Zero length hash is valid, but nothing we need to do. */ 2403 if (!chunk_size) 2404 return TEE_SUCCESS; 2405 2406 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 2407 TEE_MEMORY_ACCESS_READ | 2408 TEE_MEMORY_ACCESS_ANY_OWNER, 2409 (uaddr_t)chunk, chunk_size); 2410 if (res != TEE_SUCCESS) 2411 return res; 2412 2413 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2414 if (res != TEE_SUCCESS) 2415 return res; 2416 2417 if (cs->state != CRYP_STATE_INITIALIZED) 2418 return TEE_ERROR_BAD_STATE; 2419 2420 switch (TEE_ALG_GET_CLASS(cs->algo)) { 2421 case TEE_OPERATION_DIGEST: 2422 res = crypto_hash_update(cs->ctx, chunk, chunk_size); 2423 if (res != TEE_SUCCESS) 2424 return res; 2425 break; 2426 case TEE_OPERATION_MAC: 2427 res = crypto_mac_update(cs->ctx, chunk, chunk_size); 2428 if (res != TEE_SUCCESS) 2429 return res; 2430 break; 2431 default: 2432 return TEE_ERROR_BAD_PARAMETERS; 2433 } 2434 2435 return TEE_SUCCESS; 2436 } 2437 2438 TEE_Result syscall_hash_final(unsigned long state, const void *chunk, 2439 size_t chunk_size, void *hash, uint64_t *hash_len) 2440 { 2441 struct ts_session *sess = ts_get_current_session(); 2442 struct tee_cryp_state *cs = NULL; 2443 TEE_Result res2 = TEE_SUCCESS; 2444 TEE_Result res = TEE_SUCCESS; 2445 size_t hash_size = 0; 2446 size_t hlen = 0; 2447 2448 /* No data, but size provided isn't valid parameters. */ 2449 if (!chunk && chunk_size) 2450 return TEE_ERROR_BAD_PARAMETERS; 2451 2452 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 2453 TEE_MEMORY_ACCESS_READ | 2454 TEE_MEMORY_ACCESS_ANY_OWNER, 2455 (uaddr_t)chunk, chunk_size); 2456 if (res != TEE_SUCCESS) 2457 return res; 2458 2459 res = get_user_u64_as_size_t(&hlen, hash_len); 2460 if (res != TEE_SUCCESS) 2461 return res; 2462 2463 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 2464 TEE_MEMORY_ACCESS_READ | 2465 TEE_MEMORY_ACCESS_WRITE | 2466 TEE_MEMORY_ACCESS_ANY_OWNER, 2467 (uaddr_t)hash, hlen); 2468 if (res != TEE_SUCCESS) 2469 return res; 2470 2471 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2472 if (res != TEE_SUCCESS) 2473 return res; 2474 2475 if (cs->state != CRYP_STATE_INITIALIZED) 2476 return TEE_ERROR_BAD_STATE; 2477 2478 switch (TEE_ALG_GET_CLASS(cs->algo)) { 2479 case TEE_OPERATION_DIGEST: 2480 res = tee_alg_get_digest_size(cs->algo, &hash_size); 2481 if (res != TEE_SUCCESS) 2482 return res; 2483 if (hlen < hash_size) { 2484 res = TEE_ERROR_SHORT_BUFFER; 2485 goto out; 2486 } 2487 2488 if (chunk_size) { 2489 res = crypto_hash_update(cs->ctx, chunk, chunk_size); 2490 if (res != TEE_SUCCESS) 2491 return res; 2492 } 2493 2494 res = crypto_hash_final(cs->ctx, hash, hash_size); 2495 if (res != TEE_SUCCESS) 2496 return res; 2497 break; 2498 2499 case TEE_OPERATION_MAC: 2500 res = tee_alg_get_digest_size(cs->algo, &hash_size); 2501 if (res != TEE_SUCCESS) 2502 return res; 2503 if (hlen < hash_size) { 2504 res = TEE_ERROR_SHORT_BUFFER; 2505 goto out; 2506 } 2507 2508 if (chunk_size) { 2509 res = crypto_mac_update(cs->ctx, chunk, chunk_size); 2510 if (res != TEE_SUCCESS) 2511 return res; 2512 } 2513 2514 res = crypto_mac_final(cs->ctx, hash, hash_size); 2515 if (res != TEE_SUCCESS) 2516 return res; 2517 break; 2518 2519 default: 2520 return TEE_ERROR_BAD_PARAMETERS; 2521 } 2522 out: 2523 res2 = put_user_u64(hash_len, hash_size); 2524 if (res2 != TEE_SUCCESS) 2525 return res2; 2526 return res; 2527 } 2528 2529 TEE_Result syscall_cipher_init(unsigned long state, const void *iv, 2530 size_t iv_len) 2531 { 2532 struct ts_session *sess = ts_get_current_session(); 2533 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 2534 struct tee_cryp_obj_secret *key1 = NULL; 2535 struct tee_cryp_state *cs = NULL; 2536 TEE_Result res = TEE_SUCCESS; 2537 struct tee_obj *o = NULL; 2538 2539 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2540 if (res != TEE_SUCCESS) 2541 return res; 2542 2543 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_CIPHER) 2544 return TEE_ERROR_BAD_STATE; 2545 2546 res = vm_check_access_rights(&utc->uctx, 2547 TEE_MEMORY_ACCESS_READ | 2548 TEE_MEMORY_ACCESS_ANY_OWNER, 2549 (uaddr_t)iv, iv_len); 2550 if (res != TEE_SUCCESS) 2551 return res; 2552 2553 res = tee_obj_get(utc, cs->key1, &o); 2554 if (res != TEE_SUCCESS) 2555 return res; 2556 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 2557 return TEE_ERROR_BAD_PARAMETERS; 2558 2559 key1 = o->attr; 2560 2561 if (tee_obj_get(utc, cs->key2, &o) == TEE_SUCCESS) { 2562 struct tee_cryp_obj_secret *key2 = o->attr; 2563 2564 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 2565 return TEE_ERROR_BAD_PARAMETERS; 2566 2567 res = crypto_cipher_init(cs->ctx, cs->mode, 2568 (uint8_t *)(key1 + 1), key1->key_size, 2569 (uint8_t *)(key2 + 1), key2->key_size, 2570 iv, iv_len); 2571 } else { 2572 res = crypto_cipher_init(cs->ctx, cs->mode, 2573 (uint8_t *)(key1 + 1), key1->key_size, 2574 NULL, 0, iv, iv_len); 2575 } 2576 if (res != TEE_SUCCESS) 2577 return res; 2578 2579 cs->ctx_finalize = crypto_cipher_final; 2580 cs->state = CRYP_STATE_INITIALIZED; 2581 2582 return TEE_SUCCESS; 2583 } 2584 2585 static TEE_Result tee_svc_cipher_update_helper(unsigned long state, 2586 bool last_block, const void *src, size_t src_len, 2587 void *dst, uint64_t *dst_len) 2588 { 2589 struct ts_session *sess = ts_get_current_session(); 2590 struct tee_cryp_state *cs = NULL; 2591 TEE_Result res = TEE_SUCCESS; 2592 size_t dlen = 0; 2593 2594 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2595 if (res != TEE_SUCCESS) 2596 return res; 2597 2598 if (cs->state != CRYP_STATE_INITIALIZED) 2599 return TEE_ERROR_BAD_STATE; 2600 2601 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 2602 TEE_MEMORY_ACCESS_READ | 2603 TEE_MEMORY_ACCESS_ANY_OWNER, 2604 (uaddr_t)src, src_len); 2605 if (res != TEE_SUCCESS) 2606 return res; 2607 2608 if (!dst_len) { 2609 dlen = 0; 2610 } else { 2611 struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; 2612 uint32_t flags = TEE_MEMORY_ACCESS_READ | 2613 TEE_MEMORY_ACCESS_WRITE | 2614 TEE_MEMORY_ACCESS_ANY_OWNER; 2615 2616 res = get_user_u64_as_size_t(&dlen, dst_len); 2617 if (res != TEE_SUCCESS) 2618 return res; 2619 2620 res = vm_check_access_rights(uctx, flags, (uaddr_t)dst, dlen); 2621 if (res != TEE_SUCCESS) 2622 return res; 2623 } 2624 2625 if (dlen < src_len) { 2626 res = TEE_ERROR_SHORT_BUFFER; 2627 goto out; 2628 } 2629 2630 if (src_len > 0) { 2631 /* Permit src_len == 0 to finalize the operation */ 2632 res = tee_do_cipher_update(cs->ctx, cs->algo, cs->mode, 2633 last_block, src, src_len, dst); 2634 } 2635 2636 if (last_block && cs->ctx_finalize != NULL) { 2637 cs->ctx_finalize(cs->ctx); 2638 cs->ctx_finalize = NULL; 2639 } 2640 2641 out: 2642 if ((res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) && 2643 dst_len != NULL) { 2644 TEE_Result res2; 2645 2646 res2 = put_user_u64(dst_len, src_len); 2647 if (res2 != TEE_SUCCESS) 2648 res = res2; 2649 } 2650 2651 return res; 2652 } 2653 2654 TEE_Result syscall_cipher_update(unsigned long state, const void *src, 2655 size_t src_len, void *dst, uint64_t *dst_len) 2656 { 2657 return tee_svc_cipher_update_helper(state, false /* last_block */, 2658 src, src_len, dst, dst_len); 2659 } 2660 2661 TEE_Result syscall_cipher_final(unsigned long state, const void *src, 2662 size_t src_len, void *dst, uint64_t *dst_len) 2663 { 2664 return tee_svc_cipher_update_helper(state, true /* last_block */, 2665 src, src_len, dst, dst_len); 2666 } 2667 2668 #if defined(CFG_CRYPTO_HKDF) 2669 static TEE_Result get_hkdf_params(const TEE_Attribute *params, 2670 uint32_t param_count, 2671 void **salt, size_t *salt_len, void **info, 2672 size_t *info_len, size_t *okm_len) 2673 { 2674 size_t n; 2675 enum { SALT = 0x1, LENGTH = 0x2, INFO = 0x4 }; 2676 uint8_t found = 0; 2677 2678 *salt = *info = NULL; 2679 *salt_len = *info_len = *okm_len = 0; 2680 2681 for (n = 0; n < param_count; n++) { 2682 switch (params[n].attributeID) { 2683 case TEE_ATTR_HKDF_SALT: 2684 if (!(found & SALT)) { 2685 *salt = params[n].content.ref.buffer; 2686 *salt_len = params[n].content.ref.length; 2687 found |= SALT; 2688 } 2689 break; 2690 case TEE_ATTR_HKDF_OKM_LENGTH: 2691 if (!(found & LENGTH)) { 2692 *okm_len = params[n].content.value.a; 2693 found |= LENGTH; 2694 } 2695 break; 2696 case TEE_ATTR_HKDF_INFO: 2697 if (!(found & INFO)) { 2698 *info = params[n].content.ref.buffer; 2699 *info_len = params[n].content.ref.length; 2700 found |= INFO; 2701 } 2702 break; 2703 default: 2704 /* Unexpected attribute */ 2705 return TEE_ERROR_BAD_PARAMETERS; 2706 } 2707 2708 } 2709 2710 if (!(found & LENGTH)) 2711 return TEE_ERROR_BAD_PARAMETERS; 2712 2713 return TEE_SUCCESS; 2714 } 2715 #endif 2716 2717 #if defined(CFG_CRYPTO_CONCAT_KDF) 2718 static TEE_Result get_concat_kdf_params(const TEE_Attribute *params, 2719 uint32_t param_count, 2720 void **other_info, 2721 size_t *other_info_len, 2722 size_t *derived_key_len) 2723 { 2724 size_t n; 2725 enum { LENGTH = 0x1, INFO = 0x2 }; 2726 uint8_t found = 0; 2727 2728 *other_info = NULL; 2729 *other_info_len = *derived_key_len = 0; 2730 2731 for (n = 0; n < param_count; n++) { 2732 switch (params[n].attributeID) { 2733 case TEE_ATTR_CONCAT_KDF_OTHER_INFO: 2734 if (!(found & INFO)) { 2735 *other_info = params[n].content.ref.buffer; 2736 *other_info_len = params[n].content.ref.length; 2737 found |= INFO; 2738 } 2739 break; 2740 case TEE_ATTR_CONCAT_KDF_DKM_LENGTH: 2741 if (!(found & LENGTH)) { 2742 *derived_key_len = params[n].content.value.a; 2743 found |= LENGTH; 2744 } 2745 break; 2746 default: 2747 /* Unexpected attribute */ 2748 return TEE_ERROR_BAD_PARAMETERS; 2749 } 2750 } 2751 2752 if (!(found & LENGTH)) 2753 return TEE_ERROR_BAD_PARAMETERS; 2754 2755 return TEE_SUCCESS; 2756 } 2757 #endif 2758 2759 #if defined(CFG_CRYPTO_PBKDF2) 2760 static TEE_Result get_pbkdf2_params(const TEE_Attribute *params, 2761 uint32_t param_count, void **salt, 2762 size_t *salt_len, size_t *derived_key_len, 2763 size_t *iteration_count) 2764 { 2765 size_t n; 2766 enum { SALT = 0x1, LENGTH = 0x2, COUNT = 0x4 }; 2767 uint8_t found = 0; 2768 2769 *salt = NULL; 2770 *salt_len = *derived_key_len = *iteration_count = 0; 2771 2772 for (n = 0; n < param_count; n++) { 2773 switch (params[n].attributeID) { 2774 case TEE_ATTR_PBKDF2_SALT: 2775 if (!(found & SALT)) { 2776 *salt = params[n].content.ref.buffer; 2777 *salt_len = params[n].content.ref.length; 2778 found |= SALT; 2779 } 2780 break; 2781 case TEE_ATTR_PBKDF2_DKM_LENGTH: 2782 if (!(found & LENGTH)) { 2783 *derived_key_len = params[n].content.value.a; 2784 found |= LENGTH; 2785 } 2786 break; 2787 case TEE_ATTR_PBKDF2_ITERATION_COUNT: 2788 if (!(found & COUNT)) { 2789 *iteration_count = params[n].content.value.a; 2790 found |= COUNT; 2791 } 2792 break; 2793 default: 2794 /* Unexpected attribute */ 2795 return TEE_ERROR_BAD_PARAMETERS; 2796 } 2797 } 2798 2799 if ((found & (LENGTH|COUNT)) != (LENGTH|COUNT)) 2800 return TEE_ERROR_BAD_PARAMETERS; 2801 2802 return TEE_SUCCESS; 2803 } 2804 #endif 2805 2806 #if defined(CFG_CRYPTO_SM2_KEP) 2807 static TEE_Result get_sm2_kep_params(const TEE_Attribute *params, 2808 uint32_t param_count, 2809 struct ecc_public_key *peer_key, 2810 struct ecc_public_key *peer_eph_key, 2811 struct sm2_kep_parms *kep_parms) 2812 { 2813 TEE_Result res = TEE_ERROR_GENERIC; 2814 size_t n; 2815 enum { 2816 IS_INITIATOR, 2817 PEER_KEY_X, 2818 PEER_KEY_Y, 2819 PEER_EPH_KEY_X, 2820 PEER_EPH_KEY_Y, 2821 INITIATOR_ID, 2822 RESPONDER_ID, 2823 }; 2824 uint8_t mandatory = BIT(IS_INITIATOR) | BIT(PEER_KEY_X) | 2825 BIT(PEER_KEY_Y) | BIT(PEER_EPH_KEY_X) | BIT(PEER_EPH_KEY_Y) | 2826 BIT(INITIATOR_ID) | BIT(RESPONDER_ID); 2827 uint8_t found = 0; 2828 2829 res = crypto_acipher_alloc_ecc_public_key(peer_key, 2830 TEE_TYPE_SM2_KEP_PUBLIC_KEY, 2831 256); 2832 if (res) 2833 return res; 2834 2835 res = crypto_acipher_alloc_ecc_public_key(peer_eph_key, 2836 TEE_TYPE_SM2_KEP_PUBLIC_KEY, 2837 256); 2838 if (res) 2839 goto out_p; 2840 2841 peer_key->curve = TEE_ECC_CURVE_SM2; 2842 peer_eph_key->curve = TEE_ECC_CURVE_SM2; 2843 2844 for (n = 0; n < param_count; n++) { 2845 const TEE_Attribute *p = ¶ms[n]; 2846 2847 switch (p->attributeID) { 2848 case TEE_ATTR_SM2_KEP_USER: 2849 kep_parms->is_initiator = !p->content.value.a; 2850 found |= BIT(IS_INITIATOR); 2851 break; 2852 case TEE_ATTR_ECC_PUBLIC_VALUE_X: 2853 crypto_bignum_bin2bn(p->content.ref.buffer, 2854 p->content.ref.length, 2855 peer_key->x); 2856 found |= BIT(PEER_KEY_X); 2857 break; 2858 case TEE_ATTR_ECC_PUBLIC_VALUE_Y: 2859 crypto_bignum_bin2bn(p->content.ref.buffer, 2860 p->content.ref.length, 2861 peer_key->y); 2862 found |= BIT(PEER_KEY_Y); 2863 break; 2864 case TEE_ATTR_ECC_EPHEMERAL_PUBLIC_VALUE_X: 2865 crypto_bignum_bin2bn(p->content.ref.buffer, 2866 p->content.ref.length, 2867 peer_eph_key->x); 2868 found |= BIT(PEER_EPH_KEY_X); 2869 break; 2870 case TEE_ATTR_ECC_EPHEMERAL_PUBLIC_VALUE_Y: 2871 crypto_bignum_bin2bn(p->content.ref.buffer, 2872 p->content.ref.length, 2873 peer_eph_key->y); 2874 found |= BIT(PEER_EPH_KEY_Y); 2875 break; 2876 case TEE_ATTR_SM2_ID_INITIATOR: 2877 kep_parms->initiator_id = p->content.ref.buffer; 2878 kep_parms->initiator_id_len = p->content.ref.length; 2879 found |= BIT(INITIATOR_ID); 2880 break; 2881 case TEE_ATTR_SM2_ID_RESPONDER: 2882 kep_parms->responder_id = p->content.ref.buffer; 2883 kep_parms->responder_id_len = p->content.ref.length; 2884 found |= BIT(RESPONDER_ID); 2885 break; 2886 case TEE_ATTR_SM2_KEP_CONFIRMATION_IN: 2887 kep_parms->conf_in = p->content.ref.buffer; 2888 kep_parms->conf_in_len = p->content.ref.length; 2889 break; 2890 case TEE_ATTR_SM2_KEP_CONFIRMATION_OUT: 2891 kep_parms->conf_out = p->content.ref.buffer; 2892 kep_parms->conf_out_len = p->content.ref.length; 2893 break; 2894 default: 2895 /* Unexpected attribute */ 2896 res = TEE_ERROR_BAD_PARAMETERS; 2897 goto out; 2898 } 2899 } 2900 2901 if ((found & mandatory) != mandatory) { 2902 res = TEE_ERROR_BAD_PARAMETERS; 2903 goto out; 2904 } 2905 2906 return TEE_SUCCESS; 2907 out: 2908 crypto_acipher_free_ecc_public_key(peer_eph_key); 2909 out_p: 2910 crypto_acipher_free_ecc_public_key(peer_key); 2911 return res; 2912 } 2913 #endif 2914 2915 TEE_Result syscall_cryp_derive_key(unsigned long state, 2916 const struct utee_attribute *usr_params, 2917 unsigned long param_count, unsigned long derived_key) 2918 { 2919 struct ts_session *sess = ts_get_current_session(); 2920 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 2921 TEE_Result res = TEE_ERROR_NOT_SUPPORTED; 2922 struct tee_obj *ko = NULL; 2923 struct tee_obj *so = NULL; 2924 struct tee_cryp_state *cs = NULL; 2925 struct tee_cryp_obj_secret *sk = NULL; 2926 const struct tee_cryp_obj_type_props *type_props = NULL; 2927 TEE_Attribute *params = NULL; 2928 size_t alloc_size = 0; 2929 2930 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2931 if (res != TEE_SUCCESS) 2932 return res; 2933 2934 if (MUL_OVERFLOW(sizeof(TEE_Attribute), param_count, &alloc_size)) 2935 return TEE_ERROR_OVERFLOW; 2936 2937 params = malloc(alloc_size); 2938 if (!params) 2939 return TEE_ERROR_OUT_OF_MEMORY; 2940 res = copy_in_attrs(utc, usr_params, param_count, params); 2941 if (res != TEE_SUCCESS) 2942 goto out; 2943 2944 /* Get key set in operation */ 2945 res = tee_obj_get(utc, cs->key1, &ko); 2946 if (res != TEE_SUCCESS) 2947 goto out; 2948 2949 res = tee_obj_get(utc, uref_to_vaddr(derived_key), &so); 2950 if (res != TEE_SUCCESS) 2951 goto out; 2952 2953 /* Find information needed about the object to initialize */ 2954 sk = so->attr; 2955 2956 /* Find description of object */ 2957 type_props = tee_svc_find_type_props(so->info.objectType); 2958 if (!type_props) { 2959 res = TEE_ERROR_NOT_SUPPORTED; 2960 goto out; 2961 } 2962 2963 if (cs->algo == TEE_ALG_DH_DERIVE_SHARED_SECRET) { 2964 struct bignum *pub = NULL; 2965 struct bignum *ss = NULL; 2966 size_t bin_size = 0; 2967 2968 if (param_count != 1 || 2969 params[0].attributeID != TEE_ATTR_DH_PUBLIC_VALUE) { 2970 res = TEE_ERROR_BAD_PARAMETERS; 2971 goto out; 2972 } 2973 2974 bin_size = params[0].content.ref.length; 2975 2976 if (MUL_OVERFLOW(bin_size, 8, &alloc_size)) { 2977 res = TEE_ERROR_OVERFLOW; 2978 goto out; 2979 } 2980 2981 pub = crypto_bignum_allocate(alloc_size); 2982 ss = crypto_bignum_allocate(alloc_size); 2983 if (pub && ss) { 2984 crypto_bignum_bin2bn(params[0].content.ref.buffer, 2985 bin_size, pub); 2986 res = crypto_acipher_dh_shared_secret(ko->attr, 2987 pub, ss); 2988 if (res == TEE_SUCCESS) { 2989 sk->key_size = crypto_bignum_num_bytes(ss); 2990 crypto_bignum_bn2bin(ss, (uint8_t *)(sk + 1)); 2991 so->info.handleFlags |= 2992 TEE_HANDLE_FLAG_INITIALIZED; 2993 set_attribute(so, type_props, 2994 TEE_ATTR_SECRET_VALUE); 2995 } 2996 } else { 2997 res = TEE_ERROR_OUT_OF_MEMORY; 2998 } 2999 crypto_bignum_free(pub); 3000 crypto_bignum_free(ss); 3001 } else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_ECDH) { 3002 struct ecc_public_key key_public; 3003 uint8_t *pt_secret; 3004 unsigned long pt_secret_len; 3005 uint32_t key_type = TEE_TYPE_ECDH_PUBLIC_KEY; 3006 3007 if (param_count != 2 || 3008 params[0].attributeID != TEE_ATTR_ECC_PUBLIC_VALUE_X || 3009 params[1].attributeID != TEE_ATTR_ECC_PUBLIC_VALUE_Y) { 3010 res = TEE_ERROR_BAD_PARAMETERS; 3011 goto out; 3012 } 3013 3014 switch (cs->algo) { 3015 case TEE_ALG_ECDH_P192: 3016 alloc_size = 192; 3017 break; 3018 case TEE_ALG_ECDH_P224: 3019 alloc_size = 224; 3020 break; 3021 case TEE_ALG_ECDH_P256: 3022 alloc_size = 256; 3023 break; 3024 case TEE_ALG_ECDH_P384: 3025 alloc_size = 384; 3026 break; 3027 case TEE_ALG_ECDH_P521: 3028 alloc_size = 521; 3029 break; 3030 default: 3031 res = TEE_ERROR_NOT_IMPLEMENTED; 3032 goto out; 3033 } 3034 3035 /* Create the public key */ 3036 res = crypto_acipher_alloc_ecc_public_key(&key_public, key_type, 3037 alloc_size); 3038 if (res != TEE_SUCCESS) 3039 goto out; 3040 key_public.curve = ((struct ecc_keypair *)ko->attr)->curve; 3041 crypto_bignum_bin2bn(params[0].content.ref.buffer, 3042 params[0].content.ref.length, 3043 key_public.x); 3044 crypto_bignum_bin2bn(params[1].content.ref.buffer, 3045 params[1].content.ref.length, 3046 key_public.y); 3047 3048 pt_secret = (uint8_t *)(sk + 1); 3049 pt_secret_len = sk->alloc_size; 3050 res = crypto_acipher_ecc_shared_secret(ko->attr, &key_public, 3051 pt_secret, 3052 &pt_secret_len); 3053 3054 if (res == TEE_SUCCESS) { 3055 sk->key_size = pt_secret_len; 3056 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3057 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3058 } 3059 3060 /* free the public key */ 3061 crypto_acipher_free_ecc_public_key(&key_public); 3062 } 3063 #if defined(CFG_CRYPTO_HKDF) 3064 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_HKDF) { 3065 void *salt, *info; 3066 size_t salt_len, info_len, okm_len; 3067 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 3068 struct tee_cryp_obj_secret *ik = ko->attr; 3069 const uint8_t *ikm = (const uint8_t *)(ik + 1); 3070 3071 res = get_hkdf_params(params, param_count, &salt, &salt_len, 3072 &info, &info_len, &okm_len); 3073 if (res != TEE_SUCCESS) 3074 goto out; 3075 3076 /* Requested size must fit into the output object's buffer */ 3077 if (okm_len > ik->alloc_size) { 3078 res = TEE_ERROR_BAD_PARAMETERS; 3079 goto out; 3080 } 3081 3082 res = tee_cryp_hkdf(hash_id, ikm, ik->key_size, salt, salt_len, 3083 info, info_len, (uint8_t *)(sk + 1), 3084 okm_len); 3085 if (res == TEE_SUCCESS) { 3086 sk->key_size = okm_len; 3087 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3088 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3089 } 3090 } 3091 #endif 3092 #if defined(CFG_CRYPTO_CONCAT_KDF) 3093 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_CONCAT_KDF) { 3094 void *info; 3095 size_t info_len, derived_key_len; 3096 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 3097 struct tee_cryp_obj_secret *ss = ko->attr; 3098 const uint8_t *shared_secret = (const uint8_t *)(ss + 1); 3099 3100 res = get_concat_kdf_params(params, param_count, &info, 3101 &info_len, &derived_key_len); 3102 if (res != TEE_SUCCESS) 3103 goto out; 3104 3105 /* Requested size must fit into the output object's buffer */ 3106 if (derived_key_len > ss->alloc_size) { 3107 res = TEE_ERROR_BAD_PARAMETERS; 3108 goto out; 3109 } 3110 3111 res = tee_cryp_concat_kdf(hash_id, shared_secret, ss->key_size, 3112 info, info_len, (uint8_t *)(sk + 1), 3113 derived_key_len); 3114 if (res == TEE_SUCCESS) { 3115 sk->key_size = derived_key_len; 3116 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3117 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3118 } 3119 } 3120 #endif 3121 #if defined(CFG_CRYPTO_PBKDF2) 3122 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_PBKDF2) { 3123 void *salt; 3124 size_t salt_len, iteration_count, derived_key_len; 3125 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 3126 struct tee_cryp_obj_secret *ss = ko->attr; 3127 const uint8_t *password = (const uint8_t *)(ss + 1); 3128 3129 res = get_pbkdf2_params(params, param_count, &salt, &salt_len, 3130 &derived_key_len, &iteration_count); 3131 if (res != TEE_SUCCESS) 3132 goto out; 3133 3134 /* Requested size must fit into the output object's buffer */ 3135 if (derived_key_len > ss->alloc_size) { 3136 res = TEE_ERROR_BAD_PARAMETERS; 3137 goto out; 3138 } 3139 3140 res = tee_cryp_pbkdf2(hash_id, password, ss->key_size, salt, 3141 salt_len, iteration_count, 3142 (uint8_t *)(sk + 1), derived_key_len); 3143 if (res == TEE_SUCCESS) { 3144 sk->key_size = derived_key_len; 3145 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3146 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3147 } 3148 } 3149 #endif 3150 #if defined(CFG_CRYPTO_SM2_KEP) 3151 else if (cs->algo == TEE_ALG_SM2_KEP) { 3152 struct ecc_public_key peer_eph_key = { }; 3153 struct ecc_public_key peer_key = { }; 3154 struct sm2_kep_parms kep_parms = { 3155 .out = (uint8_t *)(sk + 1), 3156 .out_len = so->info.maxKeySize, 3157 }; 3158 struct tee_obj *ko2 = NULL; 3159 3160 res = tee_obj_get(utc, cs->key2, &ko2); 3161 if (res != TEE_SUCCESS) 3162 goto out; 3163 3164 res = get_sm2_kep_params(params, param_count, &peer_key, 3165 &peer_eph_key, &kep_parms); 3166 if (res != TEE_SUCCESS) 3167 goto out; 3168 3169 /* 3170 * key1 is our private keypair, key2 is our ephemeral public key 3171 */ 3172 res = crypto_acipher_sm2_kep_derive(ko->attr, /* key1 */ 3173 ko2->attr, /* key2 */ 3174 &peer_key, &peer_eph_key, 3175 &kep_parms); 3176 3177 if (res == TEE_SUCCESS) { 3178 sk->key_size = kep_parms.out_len; 3179 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3180 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3181 } 3182 crypto_acipher_free_ecc_public_key(&peer_key); 3183 crypto_acipher_free_ecc_public_key(&peer_eph_key); 3184 } 3185 #endif 3186 else 3187 res = TEE_ERROR_NOT_SUPPORTED; 3188 3189 out: 3190 free_wipe(params); 3191 return res; 3192 } 3193 3194 TEE_Result syscall_cryp_random_number_generate(void *buf, size_t blen) 3195 { 3196 struct ts_session *sess = ts_get_current_session(); 3197 TEE_Result res = TEE_SUCCESS; 3198 3199 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3200 TEE_MEMORY_ACCESS_WRITE, 3201 (uaddr_t)buf, blen); 3202 if (res != TEE_SUCCESS) 3203 return res; 3204 3205 res = crypto_rng_read(buf, blen); 3206 if (res != TEE_SUCCESS) 3207 return res; 3208 3209 return res; 3210 } 3211 3212 TEE_Result syscall_authenc_init(unsigned long state, const void *nonce, 3213 size_t nonce_len, size_t tag_len, 3214 size_t aad_len, size_t payload_len) 3215 { 3216 struct ts_session *sess = ts_get_current_session(); 3217 struct tee_cryp_obj_secret *key = NULL; 3218 struct tee_cryp_state *cs = NULL; 3219 TEE_Result res = TEE_SUCCESS; 3220 struct tee_obj *o = NULL; 3221 3222 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3223 TEE_MEMORY_ACCESS_READ | 3224 TEE_MEMORY_ACCESS_ANY_OWNER, 3225 (uaddr_t)nonce, nonce_len); 3226 if (res != TEE_SUCCESS) 3227 return res; 3228 3229 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3230 if (res != TEE_SUCCESS) 3231 return res; 3232 3233 res = tee_obj_get(to_user_ta_ctx(sess->ctx), cs->key1, &o); 3234 if (res != TEE_SUCCESS) 3235 return res; 3236 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 3237 return TEE_ERROR_BAD_PARAMETERS; 3238 3239 key = o->attr; 3240 res = crypto_authenc_init(cs->ctx, cs->mode, (uint8_t *)(key + 1), 3241 key->key_size, nonce, nonce_len, tag_len, 3242 aad_len, payload_len); 3243 if (res != TEE_SUCCESS) 3244 return res; 3245 3246 cs->ctx_finalize = crypto_authenc_final; 3247 cs->state = CRYP_STATE_INITIALIZED; 3248 3249 return TEE_SUCCESS; 3250 } 3251 3252 TEE_Result syscall_authenc_update_aad(unsigned long state, 3253 const void *aad_data, size_t aad_data_len) 3254 { 3255 struct ts_session *sess = ts_get_current_session(); 3256 TEE_Result res = TEE_SUCCESS; 3257 struct tee_cryp_state *cs = NULL; 3258 3259 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3260 TEE_MEMORY_ACCESS_READ | 3261 TEE_MEMORY_ACCESS_ANY_OWNER, 3262 (uaddr_t)aad_data, aad_data_len); 3263 if (res != TEE_SUCCESS) 3264 return res; 3265 3266 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3267 if (res != TEE_SUCCESS) 3268 return res; 3269 3270 if (cs->state != CRYP_STATE_INITIALIZED) 3271 return TEE_ERROR_BAD_STATE; 3272 3273 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) 3274 return TEE_ERROR_BAD_STATE; 3275 3276 res = crypto_authenc_update_aad(cs->ctx, cs->mode, aad_data, 3277 aad_data_len); 3278 if (res != TEE_SUCCESS) 3279 return res; 3280 3281 return TEE_SUCCESS; 3282 } 3283 3284 TEE_Result syscall_authenc_update_payload(unsigned long state, 3285 const void *src_data, 3286 size_t src_len, void *dst_data, 3287 uint64_t *dst_len) 3288 { 3289 struct ts_session *sess = ts_get_current_session(); 3290 struct tee_cryp_state *cs = NULL; 3291 TEE_Result res = TEE_SUCCESS; 3292 size_t dlen = 0; 3293 3294 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3295 if (res != TEE_SUCCESS) 3296 return res; 3297 3298 if (cs->state != CRYP_STATE_INITIALIZED) 3299 return TEE_ERROR_BAD_STATE; 3300 3301 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) 3302 return TEE_ERROR_BAD_STATE; 3303 3304 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3305 TEE_MEMORY_ACCESS_READ | 3306 TEE_MEMORY_ACCESS_ANY_OWNER, 3307 (uaddr_t)src_data, src_len); 3308 if (res != TEE_SUCCESS) 3309 return res; 3310 3311 res = get_user_u64_as_size_t(&dlen, dst_len); 3312 if (res != TEE_SUCCESS) 3313 return res; 3314 3315 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3316 TEE_MEMORY_ACCESS_READ | 3317 TEE_MEMORY_ACCESS_WRITE | 3318 TEE_MEMORY_ACCESS_ANY_OWNER, 3319 (uaddr_t)dst_data, dlen); 3320 if (res != TEE_SUCCESS) 3321 return res; 3322 3323 if (dlen < src_len) { 3324 res = TEE_ERROR_SHORT_BUFFER; 3325 goto out; 3326 } 3327 3328 res = crypto_authenc_update_payload(cs->ctx, cs->mode, src_data, 3329 src_len, dst_data, &dlen); 3330 out: 3331 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 3332 TEE_Result res2 = put_user_u64(dst_len, dlen); 3333 3334 if (res2 != TEE_SUCCESS) 3335 res = res2; 3336 } 3337 3338 return res; 3339 } 3340 3341 TEE_Result syscall_authenc_enc_final(unsigned long state, const void *src_data, 3342 size_t src_len, void *dst_data, 3343 uint64_t *dst_len, void *tag, 3344 uint64_t *tag_len) 3345 { 3346 struct ts_session *sess = ts_get_current_session(); 3347 struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; 3348 struct tee_cryp_state *cs = NULL; 3349 TEE_Result res = TEE_SUCCESS; 3350 size_t dlen = 0; 3351 size_t tlen = 0; 3352 3353 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3354 if (res != TEE_SUCCESS) 3355 return res; 3356 3357 if (cs->state != CRYP_STATE_INITIALIZED) 3358 return TEE_ERROR_BAD_STATE; 3359 3360 if (cs->mode != TEE_MODE_ENCRYPT) 3361 return TEE_ERROR_BAD_PARAMETERS; 3362 3363 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) 3364 return TEE_ERROR_BAD_STATE; 3365 3366 res = vm_check_access_rights(uctx, 3367 TEE_MEMORY_ACCESS_READ | 3368 TEE_MEMORY_ACCESS_ANY_OWNER, 3369 (uaddr_t)src_data, src_len); 3370 if (res != TEE_SUCCESS) 3371 return res; 3372 3373 if (!dst_len) { 3374 dlen = 0; 3375 } else { 3376 res = get_user_u64_as_size_t(&dlen, dst_len); 3377 if (res != TEE_SUCCESS) 3378 return res; 3379 3380 res = vm_check_access_rights(uctx, 3381 TEE_MEMORY_ACCESS_READ | 3382 TEE_MEMORY_ACCESS_WRITE | 3383 TEE_MEMORY_ACCESS_ANY_OWNER, 3384 (uaddr_t)dst_data, dlen); 3385 if (res != TEE_SUCCESS) 3386 return res; 3387 } 3388 3389 if (dlen < src_len) { 3390 res = TEE_ERROR_SHORT_BUFFER; 3391 goto out; 3392 } 3393 3394 res = get_user_u64_as_size_t(&tlen, tag_len); 3395 if (res != TEE_SUCCESS) 3396 return res; 3397 3398 res = vm_check_access_rights(uctx, 3399 TEE_MEMORY_ACCESS_READ | 3400 TEE_MEMORY_ACCESS_WRITE | 3401 TEE_MEMORY_ACCESS_ANY_OWNER, 3402 (uaddr_t)tag, tlen); 3403 if (res != TEE_SUCCESS) 3404 return res; 3405 3406 res = crypto_authenc_enc_final(cs->ctx, src_data, src_len, dst_data, 3407 &dlen, tag, &tlen); 3408 3409 out: 3410 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 3411 TEE_Result res2 = TEE_SUCCESS; 3412 3413 if (dst_len != NULL) { 3414 res2 = put_user_u64(dst_len, dlen); 3415 if (res2 != TEE_SUCCESS) 3416 return res2; 3417 } 3418 3419 res2 = put_user_u64(tag_len, tlen); 3420 if (res2 != TEE_SUCCESS) 3421 return res2; 3422 } 3423 3424 return res; 3425 } 3426 3427 TEE_Result syscall_authenc_dec_final(unsigned long state, 3428 const void *src_data, size_t src_len, void *dst_data, 3429 uint64_t *dst_len, const void *tag, size_t tag_len) 3430 { 3431 struct ts_session *sess = ts_get_current_session(); 3432 struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; 3433 struct tee_cryp_state *cs = NULL; 3434 TEE_Result res = TEE_SUCCESS; 3435 size_t dlen = 0; 3436 3437 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3438 if (res != TEE_SUCCESS) 3439 return res; 3440 3441 if (cs->state != CRYP_STATE_INITIALIZED) 3442 return TEE_ERROR_BAD_STATE; 3443 3444 if (cs->mode != TEE_MODE_DECRYPT) 3445 return TEE_ERROR_BAD_PARAMETERS; 3446 3447 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) 3448 return TEE_ERROR_BAD_STATE; 3449 3450 res = vm_check_access_rights(uctx, 3451 TEE_MEMORY_ACCESS_READ | 3452 TEE_MEMORY_ACCESS_ANY_OWNER, 3453 (uaddr_t)src_data, src_len); 3454 if (res != TEE_SUCCESS) 3455 return res; 3456 3457 if (!dst_len) { 3458 dlen = 0; 3459 } else { 3460 res = get_user_u64_as_size_t(&dlen, dst_len); 3461 if (res != TEE_SUCCESS) 3462 return res; 3463 3464 res = vm_check_access_rights(uctx, 3465 TEE_MEMORY_ACCESS_READ | 3466 TEE_MEMORY_ACCESS_WRITE | 3467 TEE_MEMORY_ACCESS_ANY_OWNER, 3468 (uaddr_t)dst_data, dlen); 3469 if (res != TEE_SUCCESS) 3470 return res; 3471 } 3472 3473 if (dlen < src_len) { 3474 res = TEE_ERROR_SHORT_BUFFER; 3475 goto out; 3476 } 3477 3478 res = vm_check_access_rights(uctx, TEE_MEMORY_ACCESS_READ, 3479 (uaddr_t)tag, tag_len); 3480 if (res != TEE_SUCCESS) 3481 return res; 3482 3483 res = crypto_authenc_dec_final(cs->ctx, src_data, src_len, dst_data, 3484 &dlen, tag, tag_len); 3485 3486 out: 3487 if ((res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) && 3488 dst_len != NULL) { 3489 TEE_Result res2 = put_user_u64(dst_len, dlen); 3490 3491 if (res2 != TEE_SUCCESS) 3492 return res2; 3493 } 3494 3495 return res; 3496 } 3497 3498 static int pkcs1_get_salt_len(const TEE_Attribute *params, uint32_t num_params, 3499 size_t default_len) 3500 { 3501 size_t n; 3502 3503 assert(default_len < INT_MAX); 3504 3505 for (n = 0; n < num_params; n++) { 3506 if (params[n].attributeID == TEE_ATTR_RSA_PSS_SALT_LENGTH) { 3507 if (params[n].content.value.a < INT_MAX) 3508 return params[n].content.value.a; 3509 break; 3510 } 3511 } 3512 /* 3513 * If salt length isn't provided use the default value which is 3514 * the length of the digest. 3515 */ 3516 return default_len; 3517 } 3518 3519 TEE_Result syscall_asymm_operate(unsigned long state, 3520 const struct utee_attribute *usr_params, 3521 size_t num_params, const void *src_data, size_t src_len, 3522 void *dst_data, uint64_t *dst_len) 3523 { 3524 struct ts_session *sess = ts_get_current_session(); 3525 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 3526 TEE_Result res = TEE_SUCCESS; 3527 struct tee_cryp_state *cs = NULL; 3528 size_t dlen = 0; 3529 struct tee_obj *o = NULL; 3530 void *label = NULL; 3531 size_t label_len = 0; 3532 size_t n = 0; 3533 int salt_len = 0; 3534 TEE_Attribute *params = NULL; 3535 size_t alloc_size = 0; 3536 3537 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3538 if (res != TEE_SUCCESS) 3539 return res; 3540 3541 res = vm_check_access_rights(&utc->uctx, 3542 TEE_MEMORY_ACCESS_READ | 3543 TEE_MEMORY_ACCESS_ANY_OWNER, 3544 (uaddr_t)src_data, src_len); 3545 if (res != TEE_SUCCESS) 3546 return res; 3547 3548 res = get_user_u64_as_size_t(&dlen, dst_len); 3549 if (res != TEE_SUCCESS) 3550 return res; 3551 3552 res = vm_check_access_rights(&utc->uctx, 3553 TEE_MEMORY_ACCESS_READ | 3554 TEE_MEMORY_ACCESS_WRITE | 3555 TEE_MEMORY_ACCESS_ANY_OWNER, 3556 (uaddr_t)dst_data, dlen); 3557 if (res != TEE_SUCCESS) 3558 return res; 3559 3560 if (MUL_OVERFLOW(sizeof(TEE_Attribute), num_params, &alloc_size)) 3561 return TEE_ERROR_OVERFLOW; 3562 3563 params = malloc(alloc_size); 3564 if (!params) 3565 return TEE_ERROR_OUT_OF_MEMORY; 3566 res = copy_in_attrs(utc, usr_params, num_params, params); 3567 if (res != TEE_SUCCESS) 3568 goto out; 3569 3570 res = tee_obj_get(utc, cs->key1, &o); 3571 if (res != TEE_SUCCESS) 3572 goto out; 3573 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 3574 res = TEE_ERROR_GENERIC; 3575 goto out; 3576 } 3577 3578 switch (cs->algo) { 3579 case TEE_ALG_RSA_NOPAD: 3580 if (cs->mode == TEE_MODE_ENCRYPT) { 3581 res = crypto_acipher_rsanopad_encrypt(o->attr, src_data, 3582 src_len, dst_data, 3583 &dlen); 3584 } else if (cs->mode == TEE_MODE_DECRYPT) { 3585 res = crypto_acipher_rsanopad_decrypt(o->attr, src_data, 3586 src_len, dst_data, 3587 &dlen); 3588 } else { 3589 /* 3590 * We will panic because "the mode is not compatible 3591 * with the function" 3592 */ 3593 res = TEE_ERROR_GENERIC; 3594 } 3595 break; 3596 3597 case TEE_ALG_SM2_PKE: 3598 if (cs->mode == TEE_MODE_ENCRYPT) { 3599 res = crypto_acipher_sm2_pke_encrypt(o->attr, src_data, 3600 src_len, dst_data, 3601 &dlen); 3602 } else if (cs->mode == TEE_MODE_DECRYPT) { 3603 res = crypto_acipher_sm2_pke_decrypt(o->attr, src_data, 3604 src_len, dst_data, 3605 &dlen); 3606 } else { 3607 res = TEE_ERROR_GENERIC; 3608 } 3609 break; 3610 3611 case TEE_ALG_RSAES_PKCS1_V1_5: 3612 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA1: 3613 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA224: 3614 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA256: 3615 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA384: 3616 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA512: 3617 for (n = 0; n < num_params; n++) { 3618 if (params[n].attributeID == TEE_ATTR_RSA_OAEP_LABEL) { 3619 label = params[n].content.ref.buffer; 3620 label_len = params[n].content.ref.length; 3621 break; 3622 } 3623 } 3624 3625 if (cs->mode == TEE_MODE_ENCRYPT) { 3626 res = crypto_acipher_rsaes_encrypt(cs->algo, o->attr, 3627 label, label_len, 3628 src_data, src_len, 3629 dst_data, &dlen); 3630 } else if (cs->mode == TEE_MODE_DECRYPT) { 3631 res = crypto_acipher_rsaes_decrypt( 3632 cs->algo, o->attr, label, label_len, 3633 src_data, src_len, dst_data, &dlen); 3634 } else { 3635 res = TEE_ERROR_BAD_PARAMETERS; 3636 } 3637 break; 3638 3639 #if defined(CFG_CRYPTO_RSASSA_NA1) 3640 case TEE_ALG_RSASSA_PKCS1_V1_5: 3641 #endif 3642 case TEE_ALG_RSASSA_PKCS1_V1_5_MD5: 3643 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA1: 3644 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA224: 3645 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA256: 3646 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA384: 3647 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA512: 3648 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA1: 3649 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA224: 3650 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA256: 3651 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA384: 3652 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA512: 3653 if (cs->mode != TEE_MODE_SIGN) { 3654 res = TEE_ERROR_BAD_PARAMETERS; 3655 break; 3656 } 3657 salt_len = pkcs1_get_salt_len(params, num_params, src_len); 3658 res = crypto_acipher_rsassa_sign(cs->algo, o->attr, salt_len, 3659 src_data, src_len, dst_data, 3660 &dlen); 3661 break; 3662 3663 case TEE_ALG_DSA_SHA1: 3664 case TEE_ALG_DSA_SHA224: 3665 case TEE_ALG_DSA_SHA256: 3666 res = crypto_acipher_dsa_sign(cs->algo, o->attr, src_data, 3667 src_len, dst_data, &dlen); 3668 break; 3669 case TEE_ALG_ECDSA_P192: 3670 case TEE_ALG_ECDSA_P224: 3671 case TEE_ALG_ECDSA_P256: 3672 case TEE_ALG_ECDSA_P384: 3673 case TEE_ALG_ECDSA_P521: 3674 case TEE_ALG_SM2_DSA_SM3: 3675 res = crypto_acipher_ecc_sign(cs->algo, o->attr, src_data, 3676 src_len, dst_data, &dlen); 3677 break; 3678 default: 3679 res = TEE_ERROR_BAD_PARAMETERS; 3680 break; 3681 } 3682 3683 out: 3684 free_wipe(params); 3685 3686 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 3687 TEE_Result res2 = put_user_u64(dst_len, dlen); 3688 3689 if (res2 != TEE_SUCCESS) 3690 return res2; 3691 } 3692 3693 return res; 3694 } 3695 3696 TEE_Result syscall_asymm_verify(unsigned long state, 3697 const struct utee_attribute *usr_params, 3698 size_t num_params, const void *data, size_t data_len, 3699 const void *sig, size_t sig_len) 3700 { 3701 struct ts_session *sess = ts_get_current_session(); 3702 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 3703 struct tee_cryp_state *cs = NULL; 3704 TEE_Result res = TEE_SUCCESS; 3705 TEE_Attribute *params = NULL; 3706 struct tee_obj *o = NULL; 3707 size_t hash_size = 0; 3708 uint32_t hash_algo = 0; 3709 int salt_len = 0; 3710 size_t alloc_size = 0; 3711 3712 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3713 if (res != TEE_SUCCESS) 3714 return res; 3715 3716 if (cs->mode != TEE_MODE_VERIFY) 3717 return TEE_ERROR_BAD_PARAMETERS; 3718 3719 res = vm_check_access_rights(&utc->uctx, 3720 TEE_MEMORY_ACCESS_READ | 3721 TEE_MEMORY_ACCESS_ANY_OWNER, 3722 (uaddr_t)data, data_len); 3723 if (res != TEE_SUCCESS) 3724 return res; 3725 3726 res = vm_check_access_rights(&utc->uctx, 3727 TEE_MEMORY_ACCESS_READ | 3728 TEE_MEMORY_ACCESS_ANY_OWNER, 3729 (uaddr_t)sig, sig_len); 3730 if (res != TEE_SUCCESS) 3731 return res; 3732 3733 if (MUL_OVERFLOW(sizeof(TEE_Attribute), num_params, &alloc_size)) 3734 return TEE_ERROR_OVERFLOW; 3735 3736 params = malloc(alloc_size); 3737 if (!params) 3738 return TEE_ERROR_OUT_OF_MEMORY; 3739 res = copy_in_attrs(utc, usr_params, num_params, params); 3740 if (res != TEE_SUCCESS) 3741 goto out; 3742 3743 res = tee_obj_get(utc, cs->key1, &o); 3744 if (res != TEE_SUCCESS) 3745 goto out; 3746 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 3747 res = TEE_ERROR_BAD_PARAMETERS; 3748 goto out; 3749 } 3750 3751 switch (TEE_ALG_GET_MAIN_ALG(cs->algo)) { 3752 case TEE_MAIN_ALGO_RSA: 3753 if (cs->algo != TEE_ALG_RSASSA_PKCS1_V1_5) { 3754 hash_algo = TEE_DIGEST_HASH_TO_ALGO(cs->algo); 3755 res = tee_alg_get_digest_size(hash_algo, &hash_size); 3756 if (res != TEE_SUCCESS) 3757 break; 3758 if (data_len != hash_size) { 3759 res = TEE_ERROR_BAD_PARAMETERS; 3760 break; 3761 } 3762 salt_len = pkcs1_get_salt_len(params, num_params, 3763 hash_size); 3764 } 3765 res = crypto_acipher_rsassa_verify(cs->algo, o->attr, salt_len, 3766 data, data_len, sig, 3767 sig_len); 3768 break; 3769 3770 case TEE_MAIN_ALGO_DSA: 3771 hash_algo = TEE_DIGEST_HASH_TO_ALGO(cs->algo); 3772 res = tee_alg_get_digest_size(hash_algo, &hash_size); 3773 if (res != TEE_SUCCESS) 3774 break; 3775 3776 if (data_len != hash_size) { 3777 struct dsa_public_key *key = o->attr; 3778 3779 /* 3780 * Depending on the DSA algorithm (NIST), the 3781 * digital signature output size may be truncated 3782 * to the size of a key pair (Q prime size). Q 3783 * prime size must be less or equal than the hash 3784 * output length of the hash algorithm involved. 3785 * 3786 * We're checking here in order to be able to 3787 * return this particular error code, which will 3788 * cause TEE_AsymmetricVerifyDigest() to panic as 3789 * required by GP. crypto_acipher_dsa_verify() is 3790 * implemented in the glue layer of the crypto 3791 * library and it might be a bit harder to catch 3792 * this particular case there or lead to duplicated 3793 * code in different crypto glue layers. 3794 * 3795 * The GP spec says that we SHOULD panic if 3796 * data_len != hash_size, but that would break a 3797 * few of the DSA tests in xtest where the 3798 * hash_size is larger than possible data_len. So 3799 * the compromise is in case data_len != hash_size 3800 * check that it's not smaller than what makes 3801 * sense. 3802 */ 3803 if (data_len != crypto_bignum_num_bytes(key->q)) { 3804 res = TEE_ERROR_BAD_PARAMETERS; 3805 break; 3806 } 3807 } 3808 res = crypto_acipher_dsa_verify(cs->algo, o->attr, data, 3809 data_len, sig, sig_len); 3810 break; 3811 3812 case TEE_MAIN_ALGO_ECDSA: 3813 case TEE_MAIN_ALGO_SM2_DSA_SM3: 3814 res = crypto_acipher_ecc_verify(cs->algo, o->attr, data, 3815 data_len, sig, sig_len); 3816 break; 3817 3818 default: 3819 res = TEE_ERROR_NOT_SUPPORTED; 3820 } 3821 3822 out: 3823 free_wipe(params); 3824 return res; 3825 } 3826