1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2014, STMicroelectronics International N.V. 4 * Copyright (c) 2020, 2022 Linaro Limited 5 * Copyright (c) 2022, Technology Innovation Institute (TII) 6 */ 7 8 #include <assert.h> 9 #include <bitstring.h> 10 #include <compiler.h> 11 #include <config.h> 12 #include <crypto/crypto.h> 13 #include <kernel/tee_ta_manager.h> 14 #include <kernel/user_access.h> 15 #include <memtag.h> 16 #include <mm/vm.h> 17 #include <stdlib_ext.h> 18 #include <string_ext.h> 19 #include <string.h> 20 #include <sys/queue.h> 21 #include <tee_api_defines_extensions.h> 22 #include <tee_api_types.h> 23 #include <tee/tee_cryp_utl.h> 24 #include <tee/tee_obj.h> 25 #include <tee/tee_svc_cryp.h> 26 #include <tee/tee_svc.h> 27 #include <trace.h> 28 #include <utee_defines.h> 29 #include <util.h> 30 #if defined(CFG_CRYPTO_HKDF) 31 #include <tee/tee_cryp_hkdf.h> 32 #endif 33 #if defined(CFG_CRYPTO_CONCAT_KDF) 34 #include <tee/tee_cryp_concat_kdf.h> 35 #endif 36 #if defined(CFG_CRYPTO_PBKDF2) 37 #include <tee/tee_cryp_pbkdf2.h> 38 #endif 39 40 enum cryp_state { 41 CRYP_STATE_INITIALIZED = 0, 42 CRYP_STATE_UNINITIALIZED 43 }; 44 45 typedef void (*tee_cryp_ctx_finalize_func_t) (void *ctx); 46 struct tee_cryp_state { 47 TAILQ_ENTRY(tee_cryp_state) link; 48 uint32_t algo; 49 uint32_t mode; 50 vaddr_t key1; 51 vaddr_t key2; 52 void *ctx; 53 tee_cryp_ctx_finalize_func_t ctx_finalize; 54 enum cryp_state state; 55 }; 56 57 struct tee_cryp_obj_secret { 58 uint32_t key_size; 59 uint32_t alloc_size; 60 61 /* 62 * Pseudo code visualize layout of structure 63 * Next follows data, such as: 64 * uint8_t data[alloc_size] 65 * key_size must never exceed alloc_size 66 */ 67 }; 68 69 #define TEE_TYPE_ATTR_OPTIONAL BIT(0) 70 #define TEE_TYPE_ATTR_REQUIRED BIT(1) 71 #define TEE_TYPE_ATTR_OPTIONAL_GROUP BIT(2) 72 #define TEE_TYPE_ATTR_SIZE_INDICATOR BIT(3) 73 #define TEE_TYPE_ATTR_GEN_KEY_OPT BIT(4) 74 #define TEE_TYPE_ATTR_GEN_KEY_REQ BIT(5) 75 #define TEE_TYPE_ATTR_BIGNUM_MAXBITS BIT(6) 76 77 /* Handle storing of generic secret keys of varying lengths */ 78 #define ATTR_OPS_INDEX_SECRET 0 79 /* Convert to/from big-endian byte array and provider-specific bignum */ 80 #define ATTR_OPS_INDEX_BIGNUM 1 81 /* Convert to/from value attribute depending on direction */ 82 #define ATTR_OPS_INDEX_VALUE 2 83 /* Convert to/from curve25519 attribute depending on direction */ 84 #define ATTR_OPS_INDEX_25519 3 85 86 /* Curve25519 key bytes size is always 32 bytes*/ 87 #define KEY_SIZE_BYTES_25519 UL(32) 88 /* TEE Internal Core API v1.3.1, Table 6-8 */ 89 #define TEE_ED25519_CTX_MAX_LENGTH 255 90 91 struct tee_cryp_obj_type_attrs { 92 uint32_t attr_id; 93 uint16_t flags; 94 uint16_t ops_index; 95 uint16_t raw_offs; 96 uint16_t raw_size; 97 }; 98 99 #define RAW_DATA(_x, _y) \ 100 .raw_offs = offsetof(_x, _y), .raw_size = MEMBER_SIZE(_x, _y) 101 102 static const struct tee_cryp_obj_type_attrs 103 tee_cryp_obj_secret_value_attrs[] = { 104 { 105 .attr_id = TEE_ATTR_SECRET_VALUE, 106 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 107 .ops_index = ATTR_OPS_INDEX_SECRET, 108 .raw_offs = 0, 109 .raw_size = 0 110 }, 111 }; 112 113 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_rsa_pub_key_attrs[] = { 114 { 115 .attr_id = TEE_ATTR_RSA_MODULUS, 116 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 117 .ops_index = ATTR_OPS_INDEX_BIGNUM, 118 RAW_DATA(struct rsa_public_key, n) 119 }, 120 121 { 122 .attr_id = TEE_ATTR_RSA_PUBLIC_EXPONENT, 123 .flags = TEE_TYPE_ATTR_REQUIRED, 124 .ops_index = ATTR_OPS_INDEX_BIGNUM, 125 RAW_DATA(struct rsa_public_key, e) 126 }, 127 }; 128 129 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_rsa_keypair_attrs[] = { 130 { 131 .attr_id = TEE_ATTR_RSA_MODULUS, 132 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 133 .ops_index = ATTR_OPS_INDEX_BIGNUM, 134 RAW_DATA(struct rsa_keypair, n) 135 }, 136 137 { 138 .attr_id = TEE_ATTR_RSA_PUBLIC_EXPONENT, 139 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_OPT, 140 .ops_index = ATTR_OPS_INDEX_BIGNUM, 141 RAW_DATA(struct rsa_keypair, e) 142 }, 143 144 { 145 .attr_id = TEE_ATTR_RSA_PRIVATE_EXPONENT, 146 .flags = TEE_TYPE_ATTR_REQUIRED, 147 .ops_index = ATTR_OPS_INDEX_BIGNUM, 148 RAW_DATA(struct rsa_keypair, d) 149 }, 150 151 { 152 .attr_id = TEE_ATTR_RSA_PRIME1, 153 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 154 .ops_index = ATTR_OPS_INDEX_BIGNUM, 155 RAW_DATA(struct rsa_keypair, p) 156 }, 157 158 { 159 .attr_id = TEE_ATTR_RSA_PRIME2, 160 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 161 .ops_index = ATTR_OPS_INDEX_BIGNUM, 162 RAW_DATA(struct rsa_keypair, q) 163 }, 164 165 { 166 .attr_id = TEE_ATTR_RSA_EXPONENT1, 167 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 168 .ops_index = ATTR_OPS_INDEX_BIGNUM, 169 RAW_DATA(struct rsa_keypair, dp) 170 }, 171 172 { 173 .attr_id = TEE_ATTR_RSA_EXPONENT2, 174 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 175 .ops_index = ATTR_OPS_INDEX_BIGNUM, 176 RAW_DATA(struct rsa_keypair, dq) 177 }, 178 179 { 180 .attr_id = TEE_ATTR_RSA_COEFFICIENT, 181 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 182 .ops_index = ATTR_OPS_INDEX_BIGNUM, 183 RAW_DATA(struct rsa_keypair, qp) 184 }, 185 }; 186 187 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dsa_pub_key_attrs[] = { 188 { 189 .attr_id = TEE_ATTR_DSA_PRIME, 190 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS | 191 TEE_TYPE_ATTR_SIZE_INDICATOR, 192 .ops_index = ATTR_OPS_INDEX_BIGNUM, 193 RAW_DATA(struct dsa_public_key, p) 194 }, 195 196 { 197 .attr_id = TEE_ATTR_DSA_SUBPRIME, 198 .flags = TEE_TYPE_ATTR_REQUIRED, 199 .ops_index = ATTR_OPS_INDEX_BIGNUM, 200 RAW_DATA(struct dsa_public_key, q) 201 }, 202 203 { 204 .attr_id = TEE_ATTR_DSA_BASE, 205 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 206 .ops_index = ATTR_OPS_INDEX_BIGNUM, 207 RAW_DATA(struct dsa_public_key, g) 208 }, 209 210 { 211 .attr_id = TEE_ATTR_DSA_PUBLIC_VALUE, 212 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 213 .ops_index = ATTR_OPS_INDEX_BIGNUM, 214 RAW_DATA(struct dsa_public_key, y) 215 }, 216 }; 217 218 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dsa_keypair_attrs[] = { 219 { 220 .attr_id = TEE_ATTR_DSA_PRIME, 221 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ | 222 TEE_TYPE_ATTR_BIGNUM_MAXBITS | TEE_TYPE_ATTR_SIZE_INDICATOR, 223 .ops_index = ATTR_OPS_INDEX_BIGNUM, 224 RAW_DATA(struct dsa_keypair, p) 225 }, 226 227 { 228 .attr_id = TEE_ATTR_DSA_SUBPRIME, 229 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ, 230 .ops_index = ATTR_OPS_INDEX_BIGNUM, 231 RAW_DATA(struct dsa_keypair, q) 232 }, 233 234 { 235 .attr_id = TEE_ATTR_DSA_BASE, 236 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ | 237 TEE_TYPE_ATTR_BIGNUM_MAXBITS, 238 .ops_index = ATTR_OPS_INDEX_BIGNUM, 239 RAW_DATA(struct dsa_keypair, g) 240 }, 241 242 { 243 .attr_id = TEE_ATTR_DSA_PRIVATE_VALUE, 244 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 245 .ops_index = ATTR_OPS_INDEX_BIGNUM, 246 RAW_DATA(struct dsa_keypair, x) 247 }, 248 249 { 250 .attr_id = TEE_ATTR_DSA_PUBLIC_VALUE, 251 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, 252 .ops_index = ATTR_OPS_INDEX_BIGNUM, 253 RAW_DATA(struct dsa_keypair, y) 254 }, 255 }; 256 257 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dh_keypair_attrs[] = { 258 { 259 .attr_id = TEE_ATTR_DH_PRIME, 260 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | 261 TEE_TYPE_ATTR_GEN_KEY_REQ, 262 .ops_index = ATTR_OPS_INDEX_BIGNUM, 263 RAW_DATA(struct dh_keypair, p) 264 }, 265 266 { 267 .attr_id = TEE_ATTR_DH_BASE, 268 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ, 269 .ops_index = ATTR_OPS_INDEX_BIGNUM, 270 RAW_DATA(struct dh_keypair, g) 271 }, 272 273 { 274 .attr_id = TEE_ATTR_DH_PUBLIC_VALUE, 275 .flags = TEE_TYPE_ATTR_REQUIRED, 276 .ops_index = ATTR_OPS_INDEX_BIGNUM, 277 RAW_DATA(struct dh_keypair, y) 278 }, 279 280 { 281 .attr_id = TEE_ATTR_DH_PRIVATE_VALUE, 282 .flags = TEE_TYPE_ATTR_REQUIRED, 283 .ops_index = ATTR_OPS_INDEX_BIGNUM, 284 RAW_DATA(struct dh_keypair, x) 285 }, 286 287 { 288 .attr_id = TEE_ATTR_DH_SUBPRIME, 289 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP | TEE_TYPE_ATTR_GEN_KEY_OPT, 290 .ops_index = ATTR_OPS_INDEX_BIGNUM, 291 RAW_DATA(struct dh_keypair, q) 292 }, 293 294 { 295 .attr_id = TEE_ATTR_DH_X_BITS, 296 .flags = TEE_TYPE_ATTR_GEN_KEY_OPT, 297 .ops_index = ATTR_OPS_INDEX_VALUE, 298 RAW_DATA(struct dh_keypair, xbits) 299 }, 300 }; 301 302 #if defined(CFG_CRYPTO_HKDF) 303 static const struct tee_cryp_obj_type_attrs 304 tee_cryp_obj_hkdf_ikm_attrs[] = { 305 { 306 .attr_id = TEE_ATTR_HKDF_IKM, 307 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 308 .ops_index = ATTR_OPS_INDEX_SECRET, 309 .raw_offs = 0, 310 .raw_size = 0 311 }, 312 }; 313 #endif 314 315 #if defined(CFG_CRYPTO_CONCAT_KDF) 316 static const struct tee_cryp_obj_type_attrs 317 tee_cryp_obj_concat_kdf_z_attrs[] = { 318 { 319 .attr_id = TEE_ATTR_CONCAT_KDF_Z, 320 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 321 .ops_index = ATTR_OPS_INDEX_SECRET, 322 .raw_offs = 0, 323 .raw_size = 0 324 }, 325 }; 326 #endif 327 328 #if defined(CFG_CRYPTO_PBKDF2) 329 static const struct tee_cryp_obj_type_attrs 330 tee_cryp_obj_pbkdf2_passwd_attrs[] = { 331 { 332 .attr_id = TEE_ATTR_PBKDF2_PASSWORD, 333 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 334 .ops_index = ATTR_OPS_INDEX_SECRET, 335 .raw_offs = 0, 336 .raw_size = 0 337 }, 338 }; 339 #endif 340 341 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_ecc_pub_key_attrs[] = { 342 { 343 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, 344 .flags = TEE_TYPE_ATTR_REQUIRED, 345 .ops_index = ATTR_OPS_INDEX_BIGNUM, 346 RAW_DATA(struct ecc_public_key, x) 347 }, 348 349 { 350 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, 351 .flags = TEE_TYPE_ATTR_REQUIRED, 352 .ops_index = ATTR_OPS_INDEX_BIGNUM, 353 RAW_DATA(struct ecc_public_key, y) 354 }, 355 356 { 357 .attr_id = TEE_ATTR_ECC_CURVE, 358 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 359 .ops_index = ATTR_OPS_INDEX_VALUE, 360 RAW_DATA(struct ecc_public_key, curve) 361 }, 362 }; 363 364 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_ecc_keypair_attrs[] = { 365 { 366 .attr_id = TEE_ATTR_ECC_PRIVATE_VALUE, 367 .flags = TEE_TYPE_ATTR_REQUIRED, 368 .ops_index = ATTR_OPS_INDEX_BIGNUM, 369 RAW_DATA(struct ecc_keypair, d) 370 }, 371 372 { 373 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, 374 .flags = TEE_TYPE_ATTR_REQUIRED, 375 .ops_index = ATTR_OPS_INDEX_BIGNUM, 376 RAW_DATA(struct ecc_keypair, x) 377 }, 378 379 { 380 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, 381 .flags = TEE_TYPE_ATTR_REQUIRED, 382 .ops_index = ATTR_OPS_INDEX_BIGNUM, 383 RAW_DATA(struct ecc_keypair, y) 384 }, 385 386 { 387 .attr_id = TEE_ATTR_ECC_CURVE, 388 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | 389 TEE_TYPE_ATTR_GEN_KEY_REQ, 390 .ops_index = ATTR_OPS_INDEX_VALUE, 391 RAW_DATA(struct ecc_keypair, curve) 392 }, 393 }; 394 395 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_sm2_pub_key_attrs[] = { 396 { 397 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, 398 .flags = TEE_TYPE_ATTR_REQUIRED, 399 .ops_index = ATTR_OPS_INDEX_BIGNUM, 400 RAW_DATA(struct ecc_public_key, x) 401 }, 402 403 { 404 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, 405 .flags = TEE_TYPE_ATTR_REQUIRED, 406 .ops_index = ATTR_OPS_INDEX_BIGNUM, 407 RAW_DATA(struct ecc_public_key, y) 408 }, 409 }; 410 411 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_sm2_keypair_attrs[] = { 412 { 413 .attr_id = TEE_ATTR_ECC_PRIVATE_VALUE, 414 .flags = TEE_TYPE_ATTR_REQUIRED, 415 .ops_index = ATTR_OPS_INDEX_BIGNUM, 416 RAW_DATA(struct ecc_keypair, d) 417 }, 418 419 { 420 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, 421 .flags = TEE_TYPE_ATTR_REQUIRED, 422 .ops_index = ATTR_OPS_INDEX_BIGNUM, 423 RAW_DATA(struct ecc_keypair, x) 424 }, 425 426 { 427 .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, 428 .flags = TEE_TYPE_ATTR_REQUIRED, 429 .ops_index = ATTR_OPS_INDEX_BIGNUM, 430 RAW_DATA(struct ecc_keypair, y) 431 }, 432 }; 433 434 static 435 const struct tee_cryp_obj_type_attrs tee_cryp_obj_x25519_keypair_attrs[] = { 436 { 437 .attr_id = TEE_ATTR_X25519_PRIVATE_VALUE, 438 .flags = TEE_TYPE_ATTR_REQUIRED, 439 .ops_index = ATTR_OPS_INDEX_25519, 440 RAW_DATA(struct x25519_keypair, priv) 441 }, 442 443 { 444 .attr_id = TEE_ATTR_X25519_PUBLIC_VALUE, 445 .flags = TEE_TYPE_ATTR_REQUIRED, 446 .ops_index = ATTR_OPS_INDEX_25519, 447 RAW_DATA(struct x25519_keypair, pub) 448 }, 449 }; 450 451 static 452 const struct tee_cryp_obj_type_attrs tee_cryp_obj_ed25519_pub_key_attrs[] = { 453 { 454 .attr_id = TEE_ATTR_ED25519_PUBLIC_VALUE, 455 .flags = TEE_TYPE_ATTR_REQUIRED, 456 .ops_index = ATTR_OPS_INDEX_25519, 457 RAW_DATA(struct ed25519_keypair, pub) 458 }, 459 }; 460 461 static 462 const struct tee_cryp_obj_type_attrs tee_cryp_obj_ed25519_keypair_attrs[] = { 463 { 464 .attr_id = TEE_ATTR_ED25519_PRIVATE_VALUE, 465 .flags = TEE_TYPE_ATTR_REQUIRED, 466 .ops_index = ATTR_OPS_INDEX_25519, 467 RAW_DATA(struct ed25519_keypair, priv) 468 }, 469 470 { 471 .attr_id = TEE_ATTR_ED25519_PUBLIC_VALUE, 472 .flags = TEE_TYPE_ATTR_REQUIRED, 473 .ops_index = ATTR_OPS_INDEX_25519, 474 RAW_DATA(struct ed25519_keypair, pub) 475 }, 476 }; 477 478 struct tee_cryp_obj_type_props { 479 TEE_ObjectType obj_type; 480 uint16_t min_size; /* may not be smaller than this */ 481 uint16_t max_size; /* may not be larger than this */ 482 uint16_t alloc_size; /* this many bytes are allocated to hold data */ 483 uint8_t quanta; /* may only be an multiple of this */ 484 485 uint8_t num_type_attrs; 486 const struct tee_cryp_obj_type_attrs *type_attrs; 487 }; 488 489 #define PROP(obj_type, quanta, min_size, max_size, alloc_size, type_attrs) \ 490 { (obj_type), (min_size), (max_size), (alloc_size), (quanta), \ 491 ARRAY_SIZE(type_attrs), (type_attrs) } 492 493 static const struct tee_cryp_obj_type_props tee_cryp_obj_props[] = { 494 PROP(TEE_TYPE_AES, 64, 128, 256, /* valid sizes 128, 192, 256 */ 495 256 / 8 + sizeof(struct tee_cryp_obj_secret), 496 tee_cryp_obj_secret_value_attrs), 497 PROP(TEE_TYPE_DES, 64, 64, 64, 498 /* Valid size 64 with parity */ 499 64 / 8 + sizeof(struct tee_cryp_obj_secret), 500 tee_cryp_obj_secret_value_attrs), 501 PROP(TEE_TYPE_DES3, 64, 128, 192, 502 /* Valid sizes 128, 192 with parity */ 503 192 / 8 + sizeof(struct tee_cryp_obj_secret), 504 tee_cryp_obj_secret_value_attrs), 505 PROP(TEE_TYPE_SM4, 128, 128, 128, 506 128 / 8 + sizeof(struct tee_cryp_obj_secret), 507 tee_cryp_obj_secret_value_attrs), 508 PROP(TEE_TYPE_HMAC_MD5, 8, 64, 512, 509 512 / 8 + sizeof(struct tee_cryp_obj_secret), 510 tee_cryp_obj_secret_value_attrs), 511 PROP(TEE_TYPE_HMAC_SHA1, 8, 80, 512, 512 512 / 8 + sizeof(struct tee_cryp_obj_secret), 513 tee_cryp_obj_secret_value_attrs), 514 PROP(TEE_TYPE_HMAC_SHA224, 8, 112, 512, 515 512 / 8 + sizeof(struct tee_cryp_obj_secret), 516 tee_cryp_obj_secret_value_attrs), 517 PROP(TEE_TYPE_HMAC_SHA256, 8, 192, 1024, 518 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 519 tee_cryp_obj_secret_value_attrs), 520 PROP(TEE_TYPE_HMAC_SHA384, 8, 256, 1024, 521 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 522 tee_cryp_obj_secret_value_attrs), 523 PROP(TEE_TYPE_HMAC_SHA512, 8, 256, 1024, 524 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 525 tee_cryp_obj_secret_value_attrs), 526 PROP(TEE_TYPE_HMAC_SM3, 8, 80, 1024, 527 512 / 8 + sizeof(struct tee_cryp_obj_secret), 528 tee_cryp_obj_secret_value_attrs), 529 PROP(TEE_TYPE_GENERIC_SECRET, 8, 0, 4096, 530 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 531 tee_cryp_obj_secret_value_attrs), 532 #if defined(CFG_CRYPTO_HKDF) 533 PROP(TEE_TYPE_HKDF_IKM, 8, 0, 4096, 534 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 535 tee_cryp_obj_hkdf_ikm_attrs), 536 #endif 537 #if defined(CFG_CRYPTO_CONCAT_KDF) 538 PROP(TEE_TYPE_CONCAT_KDF_Z, 8, 0, 4096, 539 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 540 tee_cryp_obj_concat_kdf_z_attrs), 541 #endif 542 #if defined(CFG_CRYPTO_PBKDF2) 543 PROP(TEE_TYPE_PBKDF2_PASSWORD, 8, 0, 4096, 544 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 545 tee_cryp_obj_pbkdf2_passwd_attrs), 546 #endif 547 PROP(TEE_TYPE_RSA_PUBLIC_KEY, 1, 256, CFG_CORE_BIGNUM_MAX_BITS, 548 sizeof(struct rsa_public_key), 549 tee_cryp_obj_rsa_pub_key_attrs), 550 551 PROP(TEE_TYPE_RSA_KEYPAIR, 1, 256, CFG_CORE_BIGNUM_MAX_BITS, 552 sizeof(struct rsa_keypair), 553 tee_cryp_obj_rsa_keypair_attrs), 554 555 PROP(TEE_TYPE_DSA_PUBLIC_KEY, 64, 512, 3072, 556 sizeof(struct dsa_public_key), 557 tee_cryp_obj_dsa_pub_key_attrs), 558 559 PROP(TEE_TYPE_DSA_KEYPAIR, 64, 512, 3072, 560 sizeof(struct dsa_keypair), 561 tee_cryp_obj_dsa_keypair_attrs), 562 563 PROP(TEE_TYPE_DH_KEYPAIR, 1, 256, 2048, 564 sizeof(struct dh_keypair), 565 tee_cryp_obj_dh_keypair_attrs), 566 567 PROP(TEE_TYPE_ECDSA_PUBLIC_KEY, 1, 192, 521, 568 sizeof(struct ecc_public_key), 569 tee_cryp_obj_ecc_pub_key_attrs), 570 571 PROP(TEE_TYPE_ECDSA_KEYPAIR, 1, 192, 521, 572 sizeof(struct ecc_keypair), 573 tee_cryp_obj_ecc_keypair_attrs), 574 575 PROP(TEE_TYPE_ECDH_PUBLIC_KEY, 1, 192, 521, 576 sizeof(struct ecc_public_key), 577 tee_cryp_obj_ecc_pub_key_attrs), 578 579 PROP(TEE_TYPE_ECDH_KEYPAIR, 1, 192, 521, 580 sizeof(struct ecc_keypair), 581 tee_cryp_obj_ecc_keypair_attrs), 582 583 PROP(TEE_TYPE_SM2_DSA_PUBLIC_KEY, 1, 256, 256, 584 sizeof(struct ecc_public_key), 585 tee_cryp_obj_sm2_pub_key_attrs), 586 587 PROP(TEE_TYPE_SM2_DSA_KEYPAIR, 1, 256, 256, 588 sizeof(struct ecc_keypair), 589 tee_cryp_obj_sm2_keypair_attrs), 590 591 PROP(TEE_TYPE_SM2_PKE_PUBLIC_KEY, 1, 256, 256, 592 sizeof(struct ecc_public_key), 593 tee_cryp_obj_sm2_pub_key_attrs), 594 595 PROP(TEE_TYPE_SM2_PKE_KEYPAIR, 1, 256, 256, 596 sizeof(struct ecc_keypair), 597 tee_cryp_obj_sm2_keypair_attrs), 598 599 PROP(TEE_TYPE_SM2_KEP_PUBLIC_KEY, 1, 256, 256, 600 sizeof(struct ecc_public_key), 601 tee_cryp_obj_sm2_pub_key_attrs), 602 603 PROP(TEE_TYPE_SM2_KEP_KEYPAIR, 1, 256, 256, 604 sizeof(struct ecc_keypair), 605 tee_cryp_obj_sm2_keypair_attrs), 606 607 PROP(TEE_TYPE_X25519_KEYPAIR, 1, 256, 256, 608 sizeof(struct x25519_keypair), 609 tee_cryp_obj_x25519_keypair_attrs), 610 611 PROP(TEE_TYPE_ED25519_PUBLIC_KEY, 1, 256, 256, 612 sizeof(struct ed25519_keypair), 613 tee_cryp_obj_ed25519_pub_key_attrs), 614 615 PROP(TEE_TYPE_ED25519_KEYPAIR, 1, 256, 256, 616 sizeof(struct ed25519_keypair), 617 tee_cryp_obj_ed25519_keypair_attrs), 618 }; 619 620 struct attr_ops { 621 TEE_Result (*from_user)(void *attr, const void *buffer, size_t size); 622 TEE_Result (*to_user)(void *attr, struct ts_session *sess, 623 void *buffer, uint64_t *size); 624 TEE_Result (*to_binary)(void *attr, void *data, size_t data_len, 625 size_t *offs); 626 bool (*from_binary)(void *attr, const void *data, size_t data_len, 627 size_t *offs); 628 TEE_Result (*from_obj)(void *attr, void *src_attr); 629 void (*free)(void *attr); 630 void (*clear)(void *attr); 631 }; 632 633 static TEE_Result op_u32_to_binary_helper(uint32_t v, uint8_t *data, 634 size_t data_len, size_t *offs) 635 { 636 uint32_t field; 637 size_t next_offs; 638 639 if (ADD_OVERFLOW(*offs, sizeof(field), &next_offs)) 640 return TEE_ERROR_OVERFLOW; 641 642 if (data && next_offs <= data_len) { 643 field = TEE_U32_TO_BIG_ENDIAN(v); 644 memcpy(data + *offs, &field, sizeof(field)); 645 } 646 (*offs) = next_offs; 647 648 return TEE_SUCCESS; 649 } 650 651 static bool op_u32_from_binary_helper(uint32_t *v, const uint8_t *data, 652 size_t data_len, size_t *offs) 653 { 654 uint32_t field; 655 656 if (!data || (*offs + sizeof(field)) > data_len) 657 return false; 658 659 memcpy(&field, data + *offs, sizeof(field)); 660 *v = TEE_U32_FROM_BIG_ENDIAN(field); 661 (*offs) += sizeof(field); 662 return true; 663 } 664 665 static TEE_Result op_attr_secret_value_from_user(void *attr, const void *buffer, 666 size_t size) 667 { 668 struct tee_cryp_obj_secret *key = attr; 669 670 /* Data size has to fit in allocated buffer */ 671 if (size > key->alloc_size) 672 return TEE_ERROR_SECURITY; 673 memcpy(key + 1, buffer, size); 674 key->key_size = size; 675 return TEE_SUCCESS; 676 } 677 678 static TEE_Result op_attr_secret_value_to_user(void *attr, 679 struct ts_session *sess __unused, 680 void *buffer, uint64_t *size) 681 { 682 TEE_Result res; 683 struct tee_cryp_obj_secret *key = attr; 684 uint64_t s; 685 uint64_t key_size; 686 687 res = copy_from_user(&s, size, sizeof(s)); 688 if (res != TEE_SUCCESS) 689 return res; 690 691 key_size = key->key_size; 692 res = copy_to_user(size, &key_size, sizeof(key_size)); 693 if (res != TEE_SUCCESS) 694 return res; 695 696 if (s < key->key_size || !buffer) 697 return TEE_ERROR_SHORT_BUFFER; 698 699 return copy_to_user(buffer, key + 1, key->key_size); 700 } 701 702 static TEE_Result op_attr_secret_value_to_binary(void *attr, void *data, 703 size_t data_len, size_t *offs) 704 { 705 TEE_Result res; 706 struct tee_cryp_obj_secret *key = attr; 707 size_t next_offs; 708 709 res = op_u32_to_binary_helper(key->key_size, data, data_len, offs); 710 if (res != TEE_SUCCESS) 711 return res; 712 713 if (ADD_OVERFLOW(*offs, key->key_size, &next_offs)) 714 return TEE_ERROR_OVERFLOW; 715 716 if (data && next_offs <= data_len) 717 memcpy((uint8_t *)data + *offs, key + 1, key->key_size); 718 (*offs) = next_offs; 719 720 return TEE_SUCCESS; 721 } 722 723 static bool op_attr_secret_value_from_binary(void *attr, const void *data, 724 size_t data_len, size_t *offs) 725 { 726 struct tee_cryp_obj_secret *key = attr; 727 uint32_t s; 728 729 if (!op_u32_from_binary_helper(&s, data, data_len, offs)) 730 return false; 731 732 if ((*offs + s) > data_len) 733 return false; 734 735 /* Data size has to fit in allocated buffer */ 736 if (s > key->alloc_size) 737 return false; 738 key->key_size = s; 739 memcpy(key + 1, (const uint8_t *)data + *offs, s); 740 (*offs) += s; 741 return true; 742 } 743 744 745 static TEE_Result op_attr_secret_value_from_obj(void *attr, void *src_attr) 746 { 747 struct tee_cryp_obj_secret *key = attr; 748 struct tee_cryp_obj_secret *src_key = src_attr; 749 750 if (src_key->key_size > key->alloc_size) 751 return TEE_ERROR_BAD_STATE; 752 memcpy(key + 1, src_key + 1, src_key->key_size); 753 key->key_size = src_key->key_size; 754 return TEE_SUCCESS; 755 } 756 757 static void op_attr_secret_value_clear(void *attr) 758 { 759 struct tee_cryp_obj_secret *key = attr; 760 761 key->key_size = 0; 762 memzero_explicit(key + 1, key->alloc_size); 763 } 764 765 static TEE_Result op_attr_bignum_from_user(void *attr, const void *buffer, 766 size_t size) 767 { 768 struct bignum **bn = attr; 769 770 return crypto_bignum_bin2bn(buffer, size, *bn); 771 } 772 773 static TEE_Result op_attr_bignum_to_user(void *attr, 774 struct ts_session *sess, 775 void *buffer, uint64_t *size) 776 { 777 TEE_Result res = TEE_SUCCESS; 778 struct bignum **bn = attr; 779 uint64_t req_size = 0; 780 uint64_t s = 0; 781 782 res = copy_from_user(&s, size, sizeof(s)); 783 if (res != TEE_SUCCESS) 784 return res; 785 786 req_size = crypto_bignum_num_bytes(*bn); 787 res = copy_to_user(size, &req_size, sizeof(req_size)); 788 if (res != TEE_SUCCESS) 789 return res; 790 if (!req_size) 791 return TEE_SUCCESS; 792 if (s < req_size || !buffer) 793 return TEE_ERROR_SHORT_BUFFER; 794 795 buffer = memtag_strip_tag(buffer); 796 797 /* Check we can access data using supplied user mode pointer */ 798 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 799 TEE_MEMORY_ACCESS_READ | 800 TEE_MEMORY_ACCESS_WRITE | 801 TEE_MEMORY_ACCESS_ANY_OWNER, 802 (uaddr_t)buffer, req_size); 803 if (res != TEE_SUCCESS) 804 return res; 805 /* 806 * Write the bignum (wich raw data points to) into an array of 807 * bytes (stored in buffer) 808 */ 809 crypto_bignum_bn2bin(*bn, buffer); 810 return TEE_SUCCESS; 811 } 812 813 static TEE_Result op_attr_bignum_to_binary(void *attr, void *data, 814 size_t data_len, size_t *offs) 815 { 816 TEE_Result res; 817 struct bignum **bn = attr; 818 uint32_t n = crypto_bignum_num_bytes(*bn); 819 size_t next_offs; 820 821 res = op_u32_to_binary_helper(n, data, data_len, offs); 822 if (res != TEE_SUCCESS) 823 return res; 824 825 if (ADD_OVERFLOW(*offs, n, &next_offs)) 826 return TEE_ERROR_OVERFLOW; 827 828 if (data && next_offs <= data_len) 829 crypto_bignum_bn2bin(*bn, (uint8_t *)data + *offs); 830 (*offs) = next_offs; 831 832 return TEE_SUCCESS; 833 } 834 835 static bool op_attr_bignum_from_binary(void *attr, const void *data, 836 size_t data_len, size_t *offs) 837 { 838 struct bignum **bn = attr; 839 uint32_t n; 840 841 if (!op_u32_from_binary_helper(&n, data, data_len, offs)) 842 return false; 843 844 if ((*offs + n) > data_len) 845 return false; 846 if (crypto_bignum_bin2bn((const uint8_t *)data + *offs, n, *bn)) 847 return false; 848 (*offs) += n; 849 return true; 850 } 851 852 static TEE_Result op_attr_bignum_from_obj(void *attr, void *src_attr) 853 { 854 struct bignum **bn = attr; 855 struct bignum **src_bn = src_attr; 856 857 crypto_bignum_copy(*bn, *src_bn); 858 return TEE_SUCCESS; 859 } 860 861 static void op_attr_bignum_clear(void *attr) 862 { 863 struct bignum **bn = attr; 864 865 crypto_bignum_clear(*bn); 866 } 867 868 static void op_attr_bignum_free(void *attr) 869 { 870 struct bignum **bn = attr; 871 872 crypto_bignum_free(*bn); 873 *bn = NULL; 874 } 875 876 static TEE_Result op_attr_value_from_user(void *attr, const void *buffer, 877 size_t size) 878 { 879 uint32_t *v = attr; 880 881 if (size != sizeof(uint32_t) * 2) 882 return TEE_ERROR_GENERIC; /* "can't happen */ 883 884 /* Note that only the first value is copied */ 885 memcpy(v, buffer, sizeof(uint32_t)); 886 return TEE_SUCCESS; 887 } 888 889 static TEE_Result op_attr_value_to_user(void *attr, 890 struct ts_session *sess __unused, 891 void *buffer, uint64_t *size) 892 { 893 TEE_Result res; 894 uint32_t *v = attr; 895 uint64_t s; 896 uint32_t value[2] = { *v }; 897 uint64_t req_size = sizeof(value); 898 899 res = copy_from_user(&s, size, sizeof(s)); 900 if (res != TEE_SUCCESS) 901 return res; 902 903 if (s < req_size || !buffer) 904 return TEE_ERROR_SHORT_BUFFER; 905 906 return copy_to_user(buffer, value, req_size); 907 } 908 909 static TEE_Result op_attr_value_to_binary(void *attr, void *data, 910 size_t data_len, size_t *offs) 911 { 912 uint32_t *v = attr; 913 914 return op_u32_to_binary_helper(*v, data, data_len, offs); 915 } 916 917 static bool op_attr_value_from_binary(void *attr, const void *data, 918 size_t data_len, size_t *offs) 919 { 920 uint32_t *v = attr; 921 922 return op_u32_from_binary_helper(v, data, data_len, offs); 923 } 924 925 static TEE_Result op_attr_value_from_obj(void *attr, void *src_attr) 926 { 927 uint32_t *v = attr; 928 uint32_t *src_v = src_attr; 929 930 *v = *src_v; 931 return TEE_SUCCESS; 932 } 933 934 static void op_attr_value_clear(void *attr) 935 { 936 uint32_t *v = attr; 937 938 *v = 0; 939 } 940 941 static TEE_Result op_attr_25519_from_user(void *attr, const void *buffer, 942 size_t size) 943 { 944 uint8_t **key = attr; 945 946 if (size != KEY_SIZE_BYTES_25519 || !*key) 947 return TEE_ERROR_SECURITY; 948 949 memcpy(*key, buffer, size); 950 951 return TEE_SUCCESS; 952 } 953 954 static TEE_Result op_attr_25519_to_user(void *attr, 955 struct ts_session *sess __unused, 956 void *buffer, uint64_t *size) 957 { 958 TEE_Result res = TEE_ERROR_GENERIC; 959 uint8_t **key = attr; 960 uint64_t s = 0; 961 uint64_t key_size = (uint64_t)KEY_SIZE_BYTES_25519; 962 963 res = copy_from_user(&s, size, sizeof(s)); 964 if (res != TEE_SUCCESS) 965 return res; 966 967 res = copy_to_user(size, &key_size, sizeof(key_size)); 968 if (res != TEE_SUCCESS) 969 return res; 970 971 if (s < key_size || !buffer) 972 return TEE_ERROR_SHORT_BUFFER; 973 974 return copy_to_user(buffer, *key, key_size); 975 } 976 977 static TEE_Result op_attr_25519_to_binary(void *attr, void *data, 978 size_t data_len, size_t *offs) 979 { 980 TEE_Result res = TEE_ERROR_GENERIC; 981 uint8_t **key = attr; 982 size_t next_offs = 0; 983 uint64_t key_size = (uint64_t)KEY_SIZE_BYTES_25519; 984 985 res = op_u32_to_binary_helper(key_size, data, data_len, offs); 986 if (res != TEE_SUCCESS) 987 return res; 988 989 if (ADD_OVERFLOW(*offs, key_size, &next_offs)) 990 return TEE_ERROR_OVERFLOW; 991 992 if (data && next_offs <= data_len) 993 memcpy((uint8_t *)data + *offs, *key, key_size); 994 *offs = next_offs; 995 996 return TEE_SUCCESS; 997 } 998 999 static bool op_attr_25519_from_binary(void *attr, const void *data, 1000 size_t data_len, size_t *offs) 1001 { 1002 uint8_t **key = attr; 1003 uint32_t s = 0; 1004 1005 if (!op_u32_from_binary_helper(&s, data, data_len, offs)) 1006 return false; 1007 1008 if (*offs + s > data_len) 1009 return false; 1010 1011 if (s > (uint32_t)KEY_SIZE_BYTES_25519) 1012 return false; 1013 1014 memcpy(*key, (const uint8_t *)data + *offs, s); 1015 *offs += s; 1016 return true; 1017 } 1018 1019 static TEE_Result op_attr_25519_from_obj(void *attr, void *src_attr) 1020 { 1021 uint8_t **key = attr; 1022 uint8_t **src_key = src_attr; 1023 1024 if (!*key || !*src_key) 1025 return TEE_ERROR_SECURITY; 1026 1027 memcpy(*key, *src_key, KEY_SIZE_BYTES_25519); 1028 1029 return TEE_SUCCESS; 1030 } 1031 1032 static void op_attr_25519_clear(void *attr) 1033 { 1034 uint8_t **key = attr; 1035 1036 assert(*key); 1037 1038 memzero_explicit(*key, KEY_SIZE_BYTES_25519); 1039 } 1040 1041 static void op_attr_25519_free(void *attr) 1042 { 1043 uint8_t **key = attr; 1044 1045 op_attr_25519_clear(attr); 1046 free(*key); 1047 } 1048 1049 static const struct attr_ops attr_ops[] = { 1050 [ATTR_OPS_INDEX_SECRET] = { 1051 .from_user = op_attr_secret_value_from_user, 1052 .to_user = op_attr_secret_value_to_user, 1053 .to_binary = op_attr_secret_value_to_binary, 1054 .from_binary = op_attr_secret_value_from_binary, 1055 .from_obj = op_attr_secret_value_from_obj, 1056 .free = op_attr_secret_value_clear, /* not a typo */ 1057 .clear = op_attr_secret_value_clear, 1058 }, 1059 [ATTR_OPS_INDEX_BIGNUM] = { 1060 .from_user = op_attr_bignum_from_user, 1061 .to_user = op_attr_bignum_to_user, 1062 .to_binary = op_attr_bignum_to_binary, 1063 .from_binary = op_attr_bignum_from_binary, 1064 .from_obj = op_attr_bignum_from_obj, 1065 .free = op_attr_bignum_free, 1066 .clear = op_attr_bignum_clear, 1067 }, 1068 [ATTR_OPS_INDEX_VALUE] = { 1069 .from_user = op_attr_value_from_user, 1070 .to_user = op_attr_value_to_user, 1071 .to_binary = op_attr_value_to_binary, 1072 .from_binary = op_attr_value_from_binary, 1073 .from_obj = op_attr_value_from_obj, 1074 .free = op_attr_value_clear, /* not a typo */ 1075 .clear = op_attr_value_clear, 1076 }, 1077 [ATTR_OPS_INDEX_25519] = { 1078 .from_user = op_attr_25519_from_user, 1079 .to_user = op_attr_25519_to_user, 1080 .to_binary = op_attr_25519_to_binary, 1081 .from_binary = op_attr_25519_from_binary, 1082 .from_obj = op_attr_25519_from_obj, 1083 .free = op_attr_25519_free, 1084 .clear = op_attr_25519_clear, 1085 }, 1086 }; 1087 1088 static TEE_Result get_user_u64_as_size_t(size_t *dst, uint64_t *src) 1089 { 1090 uint64_t d = 0; 1091 TEE_Result res = copy_from_user(&d, src, sizeof(d)); 1092 1093 /* 1094 * On 32-bit systems a size_t can't hold a uint64_t so we need to 1095 * check that the value isn't too large. 1096 */ 1097 if (!res && ADD_OVERFLOW(0, d, dst)) 1098 return TEE_ERROR_OVERFLOW; 1099 1100 return res; 1101 } 1102 1103 static TEE_Result put_user_u64(uint64_t *dst, size_t value) 1104 { 1105 uint64_t v = value; 1106 1107 return copy_to_user(dst, &v, sizeof(v)); 1108 } 1109 1110 TEE_Result syscall_cryp_obj_get_info(unsigned long obj, TEE_ObjectInfo *info) 1111 { 1112 struct ts_session *sess = ts_get_current_session(); 1113 TEE_Result res = TEE_SUCCESS; 1114 struct tee_obj *o = NULL; 1115 1116 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 1117 uref_to_vaddr(obj), &o); 1118 if (res != TEE_SUCCESS) 1119 goto exit; 1120 1121 res = copy_to_user_private(info, &o->info, sizeof(o->info)); 1122 1123 exit: 1124 return res; 1125 } 1126 1127 TEE_Result syscall_cryp_obj_restrict_usage(unsigned long obj, 1128 unsigned long usage) 1129 { 1130 struct ts_session *sess = ts_get_current_session(); 1131 TEE_Result res = TEE_SUCCESS; 1132 struct tee_obj *o = NULL; 1133 1134 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1135 if (res != TEE_SUCCESS) 1136 goto exit; 1137 1138 o->info.objectUsage &= usage; 1139 1140 exit: 1141 return res; 1142 } 1143 1144 static int tee_svc_cryp_obj_find_type_attr_idx( 1145 uint32_t attr_id, 1146 const struct tee_cryp_obj_type_props *type_props) 1147 { 1148 size_t n; 1149 1150 for (n = 0; n < type_props->num_type_attrs; n++) { 1151 if (attr_id == type_props->type_attrs[n].attr_id) 1152 return n; 1153 } 1154 return -1; 1155 } 1156 1157 static const struct tee_cryp_obj_type_props *tee_svc_find_type_props( 1158 TEE_ObjectType obj_type) 1159 { 1160 size_t n; 1161 1162 for (n = 0; n < ARRAY_SIZE(tee_cryp_obj_props); n++) { 1163 if (tee_cryp_obj_props[n].obj_type == obj_type) 1164 return tee_cryp_obj_props + n; 1165 } 1166 1167 return NULL; 1168 } 1169 1170 /* Set an attribute on an object */ 1171 static void set_attribute(struct tee_obj *o, 1172 const struct tee_cryp_obj_type_props *props, 1173 uint32_t attr) 1174 { 1175 int idx = tee_svc_cryp_obj_find_type_attr_idx(attr, props); 1176 1177 if (idx < 0) 1178 return; 1179 o->have_attrs |= BIT(idx); 1180 } 1181 1182 /* Get an attribute on an object */ 1183 static uint32_t get_attribute(const struct tee_obj *o, 1184 const struct tee_cryp_obj_type_props *props, 1185 uint32_t attr) 1186 { 1187 int idx = tee_svc_cryp_obj_find_type_attr_idx(attr, props); 1188 1189 if (idx < 0) 1190 return 0; 1191 return o->have_attrs & BIT(idx); 1192 } 1193 1194 TEE_Result syscall_cryp_obj_get_attr(unsigned long obj, unsigned long attr_id, 1195 void *buffer, uint64_t *size) 1196 { 1197 struct ts_session *sess = ts_get_current_session(); 1198 TEE_Result res = TEE_SUCCESS; 1199 struct tee_obj *o = NULL; 1200 const struct tee_cryp_obj_type_props *type_props = NULL; 1201 int idx = 0; 1202 const struct attr_ops *ops = NULL; 1203 void *attr = NULL; 1204 1205 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1206 if (res != TEE_SUCCESS) 1207 return TEE_ERROR_ITEM_NOT_FOUND; 1208 1209 /* Check that the object is initialized */ 1210 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED)) 1211 return TEE_ERROR_BAD_PARAMETERS; 1212 1213 /* Check that getting the attribute is allowed */ 1214 if (!(attr_id & TEE_ATTR_FLAG_PUBLIC) && 1215 !(o->info.objectUsage & TEE_USAGE_EXTRACTABLE)) 1216 return TEE_ERROR_BAD_PARAMETERS; 1217 1218 type_props = tee_svc_find_type_props(o->info.objectType); 1219 if (!type_props) { 1220 /* Unknown object type, "can't happen" */ 1221 return TEE_ERROR_BAD_STATE; 1222 } 1223 1224 idx = tee_svc_cryp_obj_find_type_attr_idx(attr_id, type_props); 1225 if ((idx < 0) || ((o->have_attrs & (1 << idx)) == 0)) 1226 return TEE_ERROR_ITEM_NOT_FOUND; 1227 1228 ops = attr_ops + type_props->type_attrs[idx].ops_index; 1229 attr = (uint8_t *)o->attr + type_props->type_attrs[idx].raw_offs; 1230 return ops->to_user(attr, sess, buffer, size); 1231 } 1232 1233 void tee_obj_attr_free(struct tee_obj *o) 1234 { 1235 const struct tee_cryp_obj_type_props *tp; 1236 size_t n; 1237 1238 if (!o->attr) 1239 return; 1240 tp = tee_svc_find_type_props(o->info.objectType); 1241 if (!tp) 1242 return; 1243 1244 for (n = 0; n < tp->num_type_attrs; n++) { 1245 const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; 1246 1247 attr_ops[ta->ops_index].free((uint8_t *)o->attr + ta->raw_offs); 1248 } 1249 } 1250 1251 void tee_obj_attr_clear(struct tee_obj *o) 1252 { 1253 const struct tee_cryp_obj_type_props *tp; 1254 size_t n; 1255 1256 if (!o->attr) 1257 return; 1258 tp = tee_svc_find_type_props(o->info.objectType); 1259 if (!tp) 1260 return; 1261 1262 for (n = 0; n < tp->num_type_attrs; n++) { 1263 const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; 1264 1265 attr_ops[ta->ops_index].clear((uint8_t *)o->attr + 1266 ta->raw_offs); 1267 } 1268 } 1269 1270 TEE_Result tee_obj_attr_to_binary(struct tee_obj *o, void *data, 1271 size_t *data_len) 1272 { 1273 const struct tee_cryp_obj_type_props *tp; 1274 size_t n; 1275 size_t offs = 0; 1276 size_t len = data ? *data_len : 0; 1277 TEE_Result res; 1278 1279 if (o->info.objectType == TEE_TYPE_DATA) { 1280 *data_len = 0; 1281 return TEE_SUCCESS; /* pure data object */ 1282 } 1283 if (!o->attr) 1284 return TEE_ERROR_BAD_STATE; 1285 tp = tee_svc_find_type_props(o->info.objectType); 1286 if (!tp) 1287 return TEE_ERROR_BAD_STATE; 1288 1289 for (n = 0; n < tp->num_type_attrs; n++) { 1290 const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; 1291 void *attr = (uint8_t *)o->attr + ta->raw_offs; 1292 1293 res = attr_ops[ta->ops_index].to_binary(attr, data, len, &offs); 1294 if (res != TEE_SUCCESS) 1295 return res; 1296 } 1297 1298 *data_len = offs; 1299 if (data && offs > len) 1300 return TEE_ERROR_SHORT_BUFFER; 1301 return TEE_SUCCESS; 1302 } 1303 1304 TEE_Result tee_obj_attr_from_binary(struct tee_obj *o, const void *data, 1305 size_t data_len) 1306 { 1307 const struct tee_cryp_obj_type_props *tp; 1308 size_t n; 1309 size_t offs = 0; 1310 1311 if (o->info.objectType == TEE_TYPE_DATA) 1312 return TEE_SUCCESS; /* pure data object */ 1313 if (!o->attr) 1314 return TEE_ERROR_BAD_STATE; 1315 tp = tee_svc_find_type_props(o->info.objectType); 1316 if (!tp) 1317 return TEE_ERROR_BAD_STATE; 1318 1319 for (n = 0; n < tp->num_type_attrs; n++) { 1320 const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; 1321 void *attr = (uint8_t *)o->attr + ta->raw_offs; 1322 1323 if (!attr_ops[ta->ops_index].from_binary(attr, data, data_len, 1324 &offs)) 1325 return TEE_ERROR_CORRUPT_OBJECT; 1326 } 1327 return TEE_SUCCESS; 1328 } 1329 1330 TEE_Result tee_obj_attr_copy_from(struct tee_obj *o, const struct tee_obj *src) 1331 { 1332 TEE_Result res; 1333 const struct tee_cryp_obj_type_props *tp; 1334 const struct tee_cryp_obj_type_attrs *ta; 1335 size_t n; 1336 uint32_t have_attrs = 0; 1337 void *attr; 1338 void *src_attr; 1339 1340 if (o->info.objectType == TEE_TYPE_DATA) 1341 return TEE_SUCCESS; /* pure data object */ 1342 if (!o->attr) 1343 return TEE_ERROR_BAD_STATE; 1344 tp = tee_svc_find_type_props(o->info.objectType); 1345 if (!tp) 1346 return TEE_ERROR_BAD_STATE; 1347 1348 if (o->info.objectType == src->info.objectType) { 1349 have_attrs = src->have_attrs; 1350 for (n = 0; n < tp->num_type_attrs; n++) { 1351 ta = tp->type_attrs + n; 1352 attr = (uint8_t *)o->attr + ta->raw_offs; 1353 src_attr = (uint8_t *)src->attr + ta->raw_offs; 1354 res = attr_ops[ta->ops_index].from_obj(attr, src_attr); 1355 if (res != TEE_SUCCESS) 1356 return res; 1357 } 1358 } else { 1359 const struct tee_cryp_obj_type_props *tp_src; 1360 int idx; 1361 1362 if (o->info.objectType == TEE_TYPE_RSA_PUBLIC_KEY) { 1363 if (src->info.objectType != TEE_TYPE_RSA_KEYPAIR) 1364 return TEE_ERROR_BAD_PARAMETERS; 1365 } else if (o->info.objectType == TEE_TYPE_DSA_PUBLIC_KEY) { 1366 if (src->info.objectType != TEE_TYPE_DSA_KEYPAIR) 1367 return TEE_ERROR_BAD_PARAMETERS; 1368 } else if (o->info.objectType == TEE_TYPE_ECDSA_PUBLIC_KEY) { 1369 if (src->info.objectType != TEE_TYPE_ECDSA_KEYPAIR) 1370 return TEE_ERROR_BAD_PARAMETERS; 1371 } else if (o->info.objectType == TEE_TYPE_ECDH_PUBLIC_KEY) { 1372 if (src->info.objectType != TEE_TYPE_ECDH_KEYPAIR) 1373 return TEE_ERROR_BAD_PARAMETERS; 1374 } else if (o->info.objectType == TEE_TYPE_SM2_DSA_PUBLIC_KEY) { 1375 if (src->info.objectType != TEE_TYPE_SM2_DSA_KEYPAIR) 1376 return TEE_ERROR_BAD_PARAMETERS; 1377 } else if (o->info.objectType == TEE_TYPE_SM2_PKE_PUBLIC_KEY) { 1378 if (src->info.objectType != TEE_TYPE_SM2_PKE_KEYPAIR) 1379 return TEE_ERROR_BAD_PARAMETERS; 1380 } else if (o->info.objectType == TEE_TYPE_SM2_KEP_PUBLIC_KEY) { 1381 if (src->info.objectType != TEE_TYPE_SM2_KEP_KEYPAIR) 1382 return TEE_ERROR_BAD_PARAMETERS; 1383 } else if (o->info.objectType == TEE_TYPE_ED25519_PUBLIC_KEY) { 1384 if (src->info.objectType != TEE_TYPE_ED25519_KEYPAIR) 1385 return TEE_ERROR_BAD_PARAMETERS; 1386 } else { 1387 return TEE_ERROR_BAD_PARAMETERS; 1388 } 1389 1390 tp_src = tee_svc_find_type_props(src->info.objectType); 1391 if (!tp_src) 1392 return TEE_ERROR_BAD_STATE; 1393 1394 have_attrs = BIT32(tp->num_type_attrs) - 1; 1395 for (n = 0; n < tp->num_type_attrs; n++) { 1396 ta = tp->type_attrs + n; 1397 1398 idx = tee_svc_cryp_obj_find_type_attr_idx(ta->attr_id, 1399 tp_src); 1400 if (idx < 0) 1401 return TEE_ERROR_BAD_STATE; 1402 1403 attr = (uint8_t *)o->attr + ta->raw_offs; 1404 src_attr = (uint8_t *)src->attr + 1405 tp_src->type_attrs[idx].raw_offs; 1406 res = attr_ops[ta->ops_index].from_obj(attr, src_attr); 1407 if (res != TEE_SUCCESS) 1408 return res; 1409 } 1410 } 1411 1412 o->have_attrs = have_attrs; 1413 return TEE_SUCCESS; 1414 } 1415 1416 static bool is_gp_legacy_des_key_size(TEE_ObjectType type, size_t sz) 1417 { 1418 return IS_ENABLED(CFG_COMPAT_GP10_DES) && 1419 ((type == TEE_TYPE_DES && sz == 56) || 1420 (type == TEE_TYPE_DES3 && (sz == 112 || sz == 168))); 1421 } 1422 1423 static TEE_Result check_key_size(const struct tee_cryp_obj_type_props *props, 1424 size_t key_size) 1425 { 1426 size_t sz = key_size; 1427 1428 /* 1429 * In GP Internal API Specification 1.0 the partity bits aren't 1430 * counted when telling the size of the key in bits so add them 1431 * here if missing. 1432 */ 1433 if (is_gp_legacy_des_key_size(props->obj_type, sz)) 1434 sz += sz / 7; 1435 1436 if (sz % props->quanta != 0) 1437 return TEE_ERROR_NOT_SUPPORTED; 1438 if (sz < props->min_size) 1439 return TEE_ERROR_NOT_SUPPORTED; 1440 if (sz > props->max_size) 1441 return TEE_ERROR_NOT_SUPPORTED; 1442 1443 return TEE_SUCCESS; 1444 } 1445 1446 TEE_Result tee_obj_set_type(struct tee_obj *o, uint32_t obj_type, 1447 size_t max_key_size) 1448 { 1449 TEE_Result res = TEE_SUCCESS; 1450 const struct tee_cryp_obj_type_props *type_props; 1451 1452 /* Can only set type for newly allocated objs */ 1453 if (o->attr) 1454 return TEE_ERROR_BAD_STATE; 1455 1456 /* 1457 * Verify that maxKeySize is supported and find out how 1458 * much should be allocated. 1459 */ 1460 1461 if (obj_type == TEE_TYPE_DATA) { 1462 if (max_key_size) 1463 return TEE_ERROR_NOT_SUPPORTED; 1464 } else { 1465 /* Find description of object */ 1466 type_props = tee_svc_find_type_props(obj_type); 1467 if (!type_props) 1468 return TEE_ERROR_NOT_SUPPORTED; 1469 1470 /* Check that max_key_size follows restrictions */ 1471 res = check_key_size(type_props, max_key_size); 1472 if (res) 1473 return res; 1474 1475 o->attr = calloc(1, type_props->alloc_size); 1476 if (!o->attr) 1477 return TEE_ERROR_OUT_OF_MEMORY; 1478 } 1479 1480 /* If we have a key structure, pre-allocate the bignums inside */ 1481 switch (obj_type) { 1482 case TEE_TYPE_RSA_PUBLIC_KEY: 1483 res = crypto_acipher_alloc_rsa_public_key(o->attr, 1484 max_key_size); 1485 break; 1486 case TEE_TYPE_RSA_KEYPAIR: 1487 res = crypto_acipher_alloc_rsa_keypair(o->attr, max_key_size); 1488 break; 1489 case TEE_TYPE_DSA_PUBLIC_KEY: 1490 res = crypto_acipher_alloc_dsa_public_key(o->attr, 1491 max_key_size); 1492 break; 1493 case TEE_TYPE_DSA_KEYPAIR: 1494 res = crypto_acipher_alloc_dsa_keypair(o->attr, max_key_size); 1495 break; 1496 case TEE_TYPE_DH_KEYPAIR: 1497 res = crypto_acipher_alloc_dh_keypair(o->attr, max_key_size); 1498 break; 1499 case TEE_TYPE_ECDSA_PUBLIC_KEY: 1500 case TEE_TYPE_ECDH_PUBLIC_KEY: 1501 case TEE_TYPE_SM2_DSA_PUBLIC_KEY: 1502 case TEE_TYPE_SM2_PKE_PUBLIC_KEY: 1503 case TEE_TYPE_SM2_KEP_PUBLIC_KEY: 1504 res = crypto_acipher_alloc_ecc_public_key(o->attr, obj_type, 1505 max_key_size); 1506 break; 1507 case TEE_TYPE_ECDSA_KEYPAIR: 1508 case TEE_TYPE_ECDH_KEYPAIR: 1509 case TEE_TYPE_SM2_DSA_KEYPAIR: 1510 case TEE_TYPE_SM2_PKE_KEYPAIR: 1511 case TEE_TYPE_SM2_KEP_KEYPAIR: 1512 res = crypto_acipher_alloc_ecc_keypair(o->attr, obj_type, 1513 max_key_size); 1514 break; 1515 case TEE_TYPE_X25519_KEYPAIR: 1516 res = crypto_acipher_alloc_x25519_keypair(o->attr, 1517 max_key_size); 1518 break; 1519 case TEE_TYPE_ED25519_KEYPAIR: 1520 case TEE_TYPE_ED25519_PUBLIC_KEY: 1521 res = crypto_acipher_alloc_ed25519_keypair(o->attr, 1522 max_key_size); 1523 break; 1524 default: 1525 if (obj_type != TEE_TYPE_DATA) { 1526 struct tee_cryp_obj_secret *key = o->attr; 1527 1528 key->alloc_size = type_props->alloc_size - 1529 sizeof(*key); 1530 } 1531 break; 1532 } 1533 1534 if (res != TEE_SUCCESS) 1535 return res; 1536 1537 o->info.objectType = obj_type; 1538 o->info.maxKeySize = max_key_size; 1539 o->info.objectUsage = TEE_USAGE_DEFAULT; 1540 1541 return TEE_SUCCESS; 1542 } 1543 1544 TEE_Result syscall_cryp_obj_alloc(unsigned long obj_type, 1545 unsigned long max_key_size, uint32_t *obj) 1546 { 1547 struct ts_session *sess = ts_get_current_session(); 1548 TEE_Result res = TEE_SUCCESS; 1549 struct tee_obj *o = NULL; 1550 1551 1552 o = tee_obj_alloc(); 1553 if (!o) 1554 return TEE_ERROR_OUT_OF_MEMORY; 1555 1556 res = tee_obj_set_type(o, obj_type, max_key_size); 1557 if (res != TEE_SUCCESS) { 1558 tee_obj_free(o); 1559 return res; 1560 } 1561 1562 tee_obj_add(to_user_ta_ctx(sess->ctx), o); 1563 1564 res = copy_kaddr_to_uref(obj, o); 1565 if (res != TEE_SUCCESS) 1566 tee_obj_close(to_user_ta_ctx(sess->ctx), o); 1567 return res; 1568 } 1569 1570 TEE_Result syscall_cryp_obj_close(unsigned long obj) 1571 { 1572 struct ts_session *sess = ts_get_current_session(); 1573 TEE_Result res = TEE_SUCCESS; 1574 struct tee_obj *o = NULL; 1575 1576 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1577 if (res != TEE_SUCCESS) 1578 return res; 1579 1580 /* 1581 * If it's busy it's used by an operation, a client should never have 1582 * this handle. 1583 */ 1584 if (o->busy) 1585 return TEE_ERROR_ITEM_NOT_FOUND; 1586 1587 tee_obj_close(to_user_ta_ctx(sess->ctx), o); 1588 return TEE_SUCCESS; 1589 } 1590 1591 TEE_Result syscall_cryp_obj_reset(unsigned long obj) 1592 { 1593 struct ts_session *sess = ts_get_current_session(); 1594 TEE_Result res = TEE_SUCCESS; 1595 struct tee_obj *o = NULL; 1596 1597 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1598 if (res != TEE_SUCCESS) 1599 return res; 1600 1601 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) == 0) { 1602 tee_obj_attr_clear(o); 1603 o->info.keySize = 0; 1604 o->info.objectUsage = TEE_USAGE_DEFAULT; 1605 } else { 1606 return TEE_ERROR_BAD_PARAMETERS; 1607 } 1608 1609 /* the object is no more initialized */ 1610 o->info.handleFlags &= ~TEE_HANDLE_FLAG_INITIALIZED; 1611 1612 return TEE_SUCCESS; 1613 } 1614 1615 static TEE_Result copy_in_attrs(struct user_ta_ctx *utc, 1616 const struct utee_attribute *usr_attrs, 1617 uint32_t attr_count, TEE_Attribute *attrs) 1618 { 1619 TEE_Result res = TEE_SUCCESS; 1620 size_t size = 0; 1621 uint32_t n = 0; 1622 1623 if (MUL_OVERFLOW(sizeof(struct utee_attribute), attr_count, &size)) 1624 return TEE_ERROR_OVERFLOW; 1625 1626 usr_attrs = memtag_strip_tag_const(usr_attrs); 1627 1628 res = vm_check_access_rights(&utc->uctx, 1629 TEE_MEMORY_ACCESS_READ | 1630 TEE_MEMORY_ACCESS_ANY_OWNER, 1631 (uaddr_t)usr_attrs, size); 1632 if (res != TEE_SUCCESS) 1633 return res; 1634 1635 for (n = 0; n < attr_count; n++) { 1636 attrs[n].attributeID = usr_attrs[n].attribute_id; 1637 if (attrs[n].attributeID & TEE_ATTR_FLAG_VALUE) { 1638 attrs[n].content.value.a = usr_attrs[n].a; 1639 attrs[n].content.value.b = usr_attrs[n].b; 1640 } else { 1641 uintptr_t buf = usr_attrs[n].a; 1642 size_t len = usr_attrs[n].b; 1643 uint32_t flags = TEE_MEMORY_ACCESS_READ | 1644 TEE_MEMORY_ACCESS_ANY_OWNER; 1645 1646 buf = memtag_strip_tag_vaddr((void *)buf); 1647 1648 res = vm_check_access_rights(&utc->uctx, flags, buf, 1649 len); 1650 if (res != TEE_SUCCESS) 1651 return res; 1652 attrs[n].content.ref.buffer = (void *)buf; 1653 attrs[n].content.ref.length = len; 1654 } 1655 } 1656 1657 return TEE_SUCCESS; 1658 } 1659 1660 enum attr_usage { 1661 ATTR_USAGE_POPULATE, 1662 ATTR_USAGE_GENERATE_KEY 1663 }; 1664 1665 static TEE_Result tee_svc_cryp_check_attr(enum attr_usage usage, 1666 const struct tee_cryp_obj_type_props 1667 *type_props, 1668 const TEE_Attribute *attrs, 1669 uint32_t attr_count) 1670 { 1671 uint32_t required_flag = 0; 1672 uint32_t opt_flag = 0; 1673 bool all_opt_needed = false; 1674 uint32_t req_attrs = 0; 1675 uint32_t opt_grp_attrs = 0; 1676 uint32_t attrs_found = 0; 1677 size_t n = 0; 1678 uint32_t bit = 0; 1679 uint32_t flags = 0; 1680 int idx = 0; 1681 1682 if (usage == ATTR_USAGE_POPULATE) { 1683 required_flag = TEE_TYPE_ATTR_REQUIRED; 1684 opt_flag = TEE_TYPE_ATTR_OPTIONAL_GROUP; 1685 all_opt_needed = true; 1686 } else { 1687 required_flag = TEE_TYPE_ATTR_GEN_KEY_REQ; 1688 opt_flag = TEE_TYPE_ATTR_GEN_KEY_OPT; 1689 all_opt_needed = false; 1690 } 1691 1692 /* 1693 * First find out which attributes are required and which belong to 1694 * the optional group 1695 */ 1696 for (n = 0; n < type_props->num_type_attrs; n++) { 1697 bit = 1 << n; 1698 flags = type_props->type_attrs[n].flags; 1699 1700 if (flags & required_flag) 1701 req_attrs |= bit; 1702 else if (flags & opt_flag) 1703 opt_grp_attrs |= bit; 1704 } 1705 1706 /* 1707 * Verify that all required attributes are in place and 1708 * that the same attribute isn't repeated. 1709 */ 1710 for (n = 0; n < attr_count; n++) { 1711 idx = tee_svc_cryp_obj_find_type_attr_idx( 1712 attrs[n].attributeID, 1713 type_props); 1714 1715 /* attribute not defined in current object type */ 1716 if (idx < 0) 1717 return TEE_ERROR_ITEM_NOT_FOUND; 1718 1719 bit = 1 << idx; 1720 1721 /* attribute not repeated */ 1722 if ((attrs_found & bit) != 0) 1723 return TEE_ERROR_ITEM_NOT_FOUND; 1724 1725 /* 1726 * Attribute not defined in current object type for this 1727 * usage. 1728 */ 1729 if (!(bit & (req_attrs | opt_grp_attrs))) 1730 return TEE_ERROR_ITEM_NOT_FOUND; 1731 1732 attrs_found |= bit; 1733 } 1734 /* Required attribute missing */ 1735 if ((attrs_found & req_attrs) != req_attrs) 1736 return TEE_ERROR_ITEM_NOT_FOUND; 1737 1738 /* 1739 * If the flag says that "if one of the optional attributes are included 1740 * all of them has to be included" this must be checked. 1741 */ 1742 if (all_opt_needed && (attrs_found & opt_grp_attrs) != 0 && 1743 (attrs_found & opt_grp_attrs) != opt_grp_attrs) 1744 return TEE_ERROR_ITEM_NOT_FOUND; 1745 1746 return TEE_SUCCESS; 1747 } 1748 1749 static TEE_Result get_ec_key_size(uint32_t curve, size_t *key_size) 1750 { 1751 switch (curve) { 1752 case TEE_ECC_CURVE_NIST_P192: 1753 *key_size = 192; 1754 break; 1755 case TEE_ECC_CURVE_NIST_P224: 1756 *key_size = 224; 1757 break; 1758 case TEE_ECC_CURVE_NIST_P256: 1759 *key_size = 256; 1760 break; 1761 case TEE_ECC_CURVE_NIST_P384: 1762 *key_size = 384; 1763 break; 1764 case TEE_ECC_CURVE_NIST_P521: 1765 *key_size = 521; 1766 break; 1767 case TEE_ECC_CURVE_SM2: 1768 case TEE_ECC_CURVE_25519: 1769 *key_size = 256; 1770 break; 1771 default: 1772 return TEE_ERROR_NOT_SUPPORTED; 1773 } 1774 1775 return TEE_SUCCESS; 1776 } 1777 1778 static size_t get_used_bits(const TEE_Attribute *a) 1779 { 1780 int nbits = a->content.ref.length * 8; 1781 int v = 0; 1782 1783 bit_ffs(a->content.ref.buffer, nbits, &v); 1784 return nbits - v; 1785 } 1786 1787 static TEE_Result tee_svc_cryp_obj_populate_type( 1788 struct tee_obj *o, 1789 const struct tee_cryp_obj_type_props *type_props, 1790 const TEE_Attribute *attrs, 1791 uint32_t attr_count) 1792 { 1793 TEE_Result res = TEE_SUCCESS; 1794 uint32_t have_attrs = 0; 1795 size_t obj_size = 0; 1796 size_t n = 0; 1797 int idx = 0; 1798 const struct attr_ops *ops = NULL; 1799 void *attr = NULL; 1800 1801 for (n = 0; n < attr_count; n++) { 1802 idx = tee_svc_cryp_obj_find_type_attr_idx( 1803 attrs[n].attributeID, 1804 type_props); 1805 /* attribute not defined in current object type */ 1806 if (idx < 0) 1807 return TEE_ERROR_ITEM_NOT_FOUND; 1808 1809 have_attrs |= BIT32(idx); 1810 ops = attr_ops + type_props->type_attrs[idx].ops_index; 1811 attr = (uint8_t *)o->attr + 1812 type_props->type_attrs[idx].raw_offs; 1813 if (attrs[n].attributeID & TEE_ATTR_FLAG_VALUE) 1814 res = ops->from_user(attr, &attrs[n].content.value, 1815 sizeof(attrs[n].content.value)); 1816 else 1817 res = ops->from_user(attr, attrs[n].content.ref.buffer, 1818 attrs[n].content.ref.length); 1819 if (res != TEE_SUCCESS) 1820 return res; 1821 1822 /* 1823 * The attribute that gives the size of the object is 1824 * flagged with TEE_TYPE_ATTR_SIZE_INDICATOR. 1825 */ 1826 if (type_props->type_attrs[idx].flags & 1827 TEE_TYPE_ATTR_SIZE_INDICATOR) { 1828 /* There should be only one */ 1829 if (obj_size) 1830 return TEE_ERROR_BAD_STATE; 1831 1832 /* 1833 * For ECDSA/ECDH we need to translate curve into 1834 * object size 1835 */ 1836 if (attrs[n].attributeID == TEE_ATTR_ECC_CURVE) { 1837 res = get_ec_key_size(attrs[n].content.value.a, 1838 &obj_size); 1839 if (res != TEE_SUCCESS) 1840 return res; 1841 } else { 1842 TEE_ObjectType obj_type = o->info.objectType; 1843 size_t sz = o->info.maxKeySize; 1844 1845 obj_size = attrs[n].content.ref.length * 8; 1846 /* Drop the parity bits for legacy objects */ 1847 if (is_gp_legacy_des_key_size(obj_type, sz)) 1848 obj_size -= obj_size / 8; 1849 } 1850 if (obj_size > o->info.maxKeySize) 1851 return TEE_ERROR_BAD_STATE; 1852 res = check_key_size(type_props, obj_size); 1853 if (res != TEE_SUCCESS) 1854 return TEE_ERROR_BAD_PARAMETERS; 1855 } 1856 1857 /* 1858 * Bignum attributes limited by the number of bits in 1859 * o->info.keySize are flagged with 1860 * TEE_TYPE_ATTR_BIGNUM_MAXBITS. 1861 */ 1862 if (type_props->type_attrs[idx].flags & 1863 TEE_TYPE_ATTR_BIGNUM_MAXBITS) { 1864 if (get_used_bits(attrs + n) > o->info.maxKeySize) 1865 return TEE_ERROR_BAD_STATE; 1866 } 1867 } 1868 1869 o->have_attrs = have_attrs; 1870 o->info.keySize = obj_size; 1871 /* 1872 * In GP Internal API Specification 1.0 the partity bits aren't 1873 * counted when telling the size of the key in bits so remove the 1874 * parity bits here. 1875 */ 1876 if (is_gp_legacy_des_key_size(o->info.objectType, o->info.maxKeySize)) 1877 o->info.keySize -= o->info.keySize / 8; 1878 1879 return TEE_SUCCESS; 1880 } 1881 1882 TEE_Result syscall_cryp_obj_populate(unsigned long obj, 1883 struct utee_attribute *usr_attrs, 1884 unsigned long attr_count) 1885 { 1886 struct ts_session *sess = ts_get_current_session(); 1887 TEE_Result res = TEE_SUCCESS; 1888 struct tee_obj *o = NULL; 1889 const struct tee_cryp_obj_type_props *type_props = NULL; 1890 TEE_Attribute *attrs = NULL; 1891 size_t alloc_size = 0; 1892 1893 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 1894 if (res != TEE_SUCCESS) 1895 return res; 1896 1897 /* Must be a transient object */ 1898 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 1899 return TEE_ERROR_BAD_PARAMETERS; 1900 1901 /* Must not be initialized already */ 1902 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1903 return TEE_ERROR_BAD_PARAMETERS; 1904 1905 type_props = tee_svc_find_type_props(o->info.objectType); 1906 if (!type_props) 1907 return TEE_ERROR_NOT_IMPLEMENTED; 1908 1909 if (MUL_OVERFLOW(sizeof(TEE_Attribute), attr_count, &alloc_size)) 1910 return TEE_ERROR_OVERFLOW; 1911 1912 attrs = malloc(alloc_size); 1913 if (!attrs) 1914 return TEE_ERROR_OUT_OF_MEMORY; 1915 1916 res = copy_in_attrs(to_user_ta_ctx(sess->ctx), usr_attrs, attr_count, 1917 attrs); 1918 if (res != TEE_SUCCESS) 1919 goto out; 1920 1921 res = tee_svc_cryp_check_attr(ATTR_USAGE_POPULATE, type_props, 1922 attrs, attr_count); 1923 if (res != TEE_SUCCESS) 1924 goto out; 1925 1926 res = tee_svc_cryp_obj_populate_type(o, type_props, attrs, attr_count); 1927 if (res == TEE_SUCCESS) 1928 o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 1929 1930 out: 1931 free_wipe(attrs); 1932 return res; 1933 } 1934 1935 TEE_Result syscall_cryp_obj_copy(unsigned long dst, unsigned long src) 1936 { 1937 struct ts_session *sess = ts_get_current_session(); 1938 TEE_Result res = TEE_SUCCESS; 1939 struct tee_obj *dst_o = NULL; 1940 struct tee_obj *src_o = NULL; 1941 1942 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 1943 uref_to_vaddr(dst), &dst_o); 1944 if (res != TEE_SUCCESS) 1945 return res; 1946 1947 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 1948 uref_to_vaddr(src), &src_o); 1949 if (res != TEE_SUCCESS) 1950 return res; 1951 1952 if ((src_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 1953 return TEE_ERROR_BAD_PARAMETERS; 1954 if ((dst_o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 1955 return TEE_ERROR_BAD_PARAMETERS; 1956 if ((dst_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1957 return TEE_ERROR_BAD_PARAMETERS; 1958 1959 res = tee_obj_attr_copy_from(dst_o, src_o); 1960 if (res != TEE_SUCCESS) 1961 return res; 1962 1963 dst_o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 1964 dst_o->info.keySize = src_o->info.keySize; 1965 dst_o->info.objectUsage = src_o->info.objectUsage; 1966 return TEE_SUCCESS; 1967 } 1968 1969 static TEE_Result check_pub_rsa_key(struct bignum *e) 1970 { 1971 size_t n = crypto_bignum_num_bytes(e); 1972 uint8_t bin_key[256 / 8] = { 0 }; 1973 1974 /* 1975 * NIST SP800-56B requires public RSA key to be an odd integer in 1976 * the range 65537 <= e < 2^256. 1977 */ 1978 1979 if (n > sizeof(bin_key) || n < 3) 1980 return TEE_ERROR_BAD_PARAMETERS; 1981 1982 crypto_bignum_bn2bin(e, bin_key); 1983 1984 if (!(bin_key[n - 1] & 1)) /* key must be odd */ 1985 return TEE_ERROR_BAD_PARAMETERS; 1986 1987 if (n == 3) { 1988 uint32_t key = 0; 1989 1990 for (n = 0; n < 3; n++) { 1991 key <<= 8; 1992 key |= bin_key[n]; 1993 } 1994 1995 if (key < 65537) 1996 return TEE_ERROR_BAD_PARAMETERS; 1997 } 1998 1999 /* key is larger than 65537 */ 2000 return TEE_SUCCESS; 2001 } 2002 2003 static TEE_Result tee_svc_obj_generate_key_rsa( 2004 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 2005 uint32_t key_size, 2006 const TEE_Attribute *params, uint32_t param_count) 2007 { 2008 TEE_Result res = TEE_SUCCESS; 2009 struct rsa_keypair *key = o->attr; 2010 uint32_t e = TEE_U32_TO_BIG_ENDIAN(65537); 2011 2012 /* Copy the present attributes into the obj before starting */ 2013 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 2014 param_count); 2015 if (res != TEE_SUCCESS) 2016 return res; 2017 if (get_attribute(o, type_props, TEE_ATTR_RSA_PUBLIC_EXPONENT)) { 2018 res = check_pub_rsa_key(key->e); 2019 if (res) 2020 return res; 2021 } else { 2022 crypto_bignum_bin2bn((const uint8_t *)&e, sizeof(e), key->e); 2023 } 2024 res = crypto_acipher_gen_rsa_key(key, key_size); 2025 if (res != TEE_SUCCESS) 2026 return res; 2027 2028 /* Set bits for all known attributes for this object type */ 2029 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 2030 2031 return TEE_SUCCESS; 2032 } 2033 2034 static TEE_Result tee_svc_obj_generate_key_dsa( 2035 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 2036 uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) 2037 { 2038 TEE_Result res; 2039 2040 /* Copy the present attributes into the obj before starting */ 2041 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 2042 param_count); 2043 if (res != TEE_SUCCESS) 2044 return res; 2045 2046 res = crypto_acipher_gen_dsa_key(o->attr, key_size); 2047 if (res != TEE_SUCCESS) 2048 return res; 2049 2050 /* Set bits for all known attributes for this object type */ 2051 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 2052 2053 return TEE_SUCCESS; 2054 } 2055 2056 static TEE_Result tee_svc_obj_generate_key_dh( 2057 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 2058 uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) 2059 { 2060 TEE_Result res; 2061 struct dh_keypair *tee_dh_key; 2062 struct bignum *dh_q = NULL; 2063 uint32_t dh_xbits = 0; 2064 2065 /* Copy the present attributes into the obj before starting */ 2066 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 2067 param_count); 2068 if (res != TEE_SUCCESS) 2069 return res; 2070 2071 tee_dh_key = (struct dh_keypair *)o->attr; 2072 2073 if (get_attribute(o, type_props, TEE_ATTR_DH_SUBPRIME)) 2074 dh_q = tee_dh_key->q; 2075 if (get_attribute(o, type_props, TEE_ATTR_DH_X_BITS)) 2076 dh_xbits = tee_dh_key->xbits; 2077 res = crypto_acipher_gen_dh_key(tee_dh_key, dh_q, dh_xbits, key_size); 2078 if (res != TEE_SUCCESS) 2079 return res; 2080 2081 /* Set bits for the generated public and private key */ 2082 set_attribute(o, type_props, TEE_ATTR_DH_PUBLIC_VALUE); 2083 set_attribute(o, type_props, TEE_ATTR_DH_PRIVATE_VALUE); 2084 set_attribute(o, type_props, TEE_ATTR_DH_X_BITS); 2085 return TEE_SUCCESS; 2086 } 2087 2088 static TEE_Result tee_svc_obj_generate_key_ecc( 2089 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 2090 uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) 2091 { 2092 TEE_Result res; 2093 struct ecc_keypair *tee_ecc_key; 2094 2095 /* Copy the present attributes into the obj before starting */ 2096 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 2097 param_count); 2098 if (res != TEE_SUCCESS) 2099 return res; 2100 2101 tee_ecc_key = (struct ecc_keypair *)o->attr; 2102 2103 res = crypto_acipher_gen_ecc_key(tee_ecc_key, key_size); 2104 if (res != TEE_SUCCESS) 2105 return res; 2106 2107 /* Set bits for the generated public and private key */ 2108 set_attribute(o, type_props, TEE_ATTR_ECC_PRIVATE_VALUE); 2109 set_attribute(o, type_props, TEE_ATTR_ECC_PUBLIC_VALUE_X); 2110 set_attribute(o, type_props, TEE_ATTR_ECC_PUBLIC_VALUE_Y); 2111 set_attribute(o, type_props, TEE_ATTR_ECC_CURVE); 2112 return TEE_SUCCESS; 2113 } 2114 2115 static TEE_Result 2116 tee_svc_obj_generate_key_x25519(struct tee_obj *o, 2117 const struct tee_cryp_obj_type_props 2118 *type_props, 2119 uint32_t key_size, 2120 const TEE_Attribute *params, 2121 uint32_t param_count) 2122 { 2123 TEE_Result res = TEE_ERROR_GENERIC; 2124 struct x25519_keypair *tee_x25519_key = NULL; 2125 2126 /* Copy the present attributes into the obj before starting */ 2127 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 2128 param_count); 2129 if (res != TEE_SUCCESS) 2130 return res; 2131 2132 tee_x25519_key = (struct x25519_keypair *)o->attr; 2133 2134 res = crypto_acipher_gen_x25519_key(tee_x25519_key, key_size); 2135 if (res != TEE_SUCCESS) 2136 return res; 2137 2138 /* Set bits for the generated public and private key */ 2139 set_attribute(o, type_props, TEE_ATTR_X25519_PRIVATE_VALUE); 2140 set_attribute(o, type_props, TEE_ATTR_X25519_PUBLIC_VALUE); 2141 return TEE_SUCCESS; 2142 } 2143 2144 static TEE_Result 2145 tee_svc_obj_generate_key_ed25519(struct tee_obj *o, 2146 const struct tee_cryp_obj_type_props 2147 *type_props, 2148 uint32_t key_size, 2149 const TEE_Attribute *params, 2150 uint32_t param_count) 2151 { 2152 TEE_Result res = TEE_ERROR_GENERIC; 2153 struct ed25519_keypair *key = NULL; 2154 2155 /* Copy the present attributes into the obj before starting */ 2156 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 2157 param_count); 2158 if (res != TEE_SUCCESS) 2159 return res; 2160 2161 key = o->attr; 2162 2163 res = crypto_acipher_gen_ed25519_key(key, key_size); 2164 if (res != TEE_SUCCESS) 2165 return res; 2166 2167 /* Set bits for the generated public and private key */ 2168 set_attribute(o, type_props, TEE_ATTR_ED25519_PRIVATE_VALUE); 2169 set_attribute(o, type_props, TEE_ATTR_ED25519_PUBLIC_VALUE); 2170 return TEE_SUCCESS; 2171 } 2172 2173 static TEE_Result 2174 tee_svc_obj_ed25519_parse_params(const TEE_Attribute *params, size_t num_params, 2175 bool *ph_flag, const uint8_t **ctx, 2176 size_t *ctx_len) 2177 { 2178 size_t n = 0; 2179 2180 *ctx = NULL; 2181 2182 for (n = 0; n < num_params; n++) { 2183 switch (params[n].attributeID) { 2184 case TEE_ATTR_EDDSA_PREHASH: 2185 *ph_flag = true; 2186 break; 2187 2188 case TEE_ATTR_EDDSA_CTX: 2189 /* several provided contexts are treated as error */ 2190 if (*ctx) 2191 return TEE_ERROR_BAD_PARAMETERS; 2192 2193 *ctx_len = params[n].content.ref.length; 2194 if (*ctx_len > TEE_ED25519_CTX_MAX_LENGTH) 2195 return TEE_ERROR_BAD_PARAMETERS; 2196 2197 if (!*ctx_len) 2198 break; 2199 2200 *ctx = params[n].content.ref.buffer; 2201 if (!*ctx) 2202 return TEE_ERROR_BAD_PARAMETERS; 2203 break; 2204 2205 default: 2206 return TEE_ERROR_BAD_PARAMETERS; 2207 } 2208 } 2209 2210 return TEE_SUCCESS; 2211 } 2212 2213 static TEE_Result 2214 tee_svc_obj_ed25519_sign(struct ed25519_keypair *key, 2215 const uint8_t *msg, size_t msg_len, 2216 uint8_t *sig, size_t *sig_len, 2217 const TEE_Attribute *params, size_t num_params) 2218 { 2219 TEE_Result err = TEE_ERROR_GENERIC; 2220 size_t ctx_len = 0; 2221 const uint8_t *ctx = NULL; 2222 bool ph_flag = false; 2223 2224 err = tee_svc_obj_ed25519_parse_params(params, num_params, &ph_flag, 2225 &ctx, &ctx_len); 2226 if (err != TEE_SUCCESS) 2227 return err; 2228 2229 if (ph_flag || ctx) { 2230 return crypto_acipher_ed25519ctx_sign(key, msg, msg_len, sig, 2231 sig_len, ph_flag, 2232 ctx, ctx_len); 2233 } 2234 2235 return crypto_acipher_ed25519_sign(key, msg, msg_len, sig, sig_len); 2236 } 2237 2238 static TEE_Result 2239 tee_svc_obj_ed25519_verify(struct ed25519_keypair *key, 2240 const uint8_t *msg, size_t msg_len, 2241 const uint8_t *sig, size_t sig_len, 2242 const TEE_Attribute *params, size_t num_params) 2243 { 2244 TEE_Result err = TEE_ERROR_GENERIC; 2245 size_t ctx_len = 0; 2246 const uint8_t *ctx = NULL; 2247 bool ph_flag = false; 2248 2249 err = tee_svc_obj_ed25519_parse_params(params, num_params, &ph_flag, 2250 &ctx, &ctx_len); 2251 if (err) 2252 return err; 2253 2254 if (ph_flag || ctx) { 2255 return crypto_acipher_ed25519ctx_verify(key, msg, msg_len, sig, 2256 sig_len, ph_flag, 2257 ctx, ctx_len); 2258 } 2259 2260 return crypto_acipher_ed25519_verify(key, msg, msg_len, sig, sig_len); 2261 } 2262 2263 TEE_Result syscall_obj_generate_key(unsigned long obj, unsigned long key_size, 2264 const struct utee_attribute *usr_params, 2265 unsigned long param_count) 2266 { 2267 struct ts_session *sess = ts_get_current_session(); 2268 TEE_Result res = TEE_SUCCESS; 2269 const struct tee_cryp_obj_type_props *type_props = NULL; 2270 struct tee_obj *o = NULL; 2271 struct tee_cryp_obj_secret *key = NULL; 2272 size_t byte_size = 0; 2273 TEE_Attribute *params = NULL; 2274 size_t alloc_size = 0; 2275 2276 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 2277 if (res != TEE_SUCCESS) 2278 return res; 2279 2280 /* Must be a transient object */ 2281 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 2282 return TEE_ERROR_BAD_STATE; 2283 2284 /* Must not be initialized already */ 2285 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 2286 return TEE_ERROR_BAD_STATE; 2287 2288 /* Find description of object */ 2289 type_props = tee_svc_find_type_props(o->info.objectType); 2290 if (!type_props) 2291 return TEE_ERROR_NOT_SUPPORTED; 2292 2293 /* Check that key_size follows restrictions */ 2294 res = check_key_size(type_props, key_size); 2295 if (res) 2296 return res; 2297 2298 if (MUL_OVERFLOW(sizeof(TEE_Attribute), param_count, &alloc_size)) 2299 return TEE_ERROR_OVERFLOW; 2300 2301 params = malloc(alloc_size); 2302 if (!params) 2303 return TEE_ERROR_OUT_OF_MEMORY; 2304 res = copy_in_attrs(to_user_ta_ctx(sess->ctx), usr_params, param_count, 2305 params); 2306 if (res != TEE_SUCCESS) 2307 goto out; 2308 2309 res = tee_svc_cryp_check_attr(ATTR_USAGE_GENERATE_KEY, type_props, 2310 params, param_count); 2311 if (res != TEE_SUCCESS) 2312 goto out; 2313 2314 switch (o->info.objectType) { 2315 case TEE_TYPE_AES: 2316 case TEE_TYPE_DES: 2317 case TEE_TYPE_DES3: 2318 case TEE_TYPE_SM4: 2319 case TEE_TYPE_HMAC_MD5: 2320 case TEE_TYPE_HMAC_SHA1: 2321 case TEE_TYPE_HMAC_SHA224: 2322 case TEE_TYPE_HMAC_SHA256: 2323 case TEE_TYPE_HMAC_SHA384: 2324 case TEE_TYPE_HMAC_SHA512: 2325 case TEE_TYPE_HMAC_SM3: 2326 case TEE_TYPE_GENERIC_SECRET: 2327 byte_size = key_size / 8; 2328 2329 /* 2330 * In GP Internal API Specification 1.0 the partity bits 2331 * aren't counted when telling the size of the key in bits. 2332 */ 2333 if (is_gp_legacy_des_key_size(o->info.objectType, key_size)) 2334 byte_size = (key_size + key_size / 7) / 8; 2335 2336 key = (struct tee_cryp_obj_secret *)o->attr; 2337 if (byte_size > key->alloc_size) { 2338 res = TEE_ERROR_EXCESS_DATA; 2339 goto out; 2340 } 2341 2342 res = crypto_rng_read((void *)(key + 1), byte_size); 2343 if (res != TEE_SUCCESS) 2344 goto out; 2345 2346 key->key_size = byte_size; 2347 2348 /* Set bits for all known attributes for this object type */ 2349 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 2350 2351 break; 2352 2353 case TEE_TYPE_RSA_KEYPAIR: 2354 res = tee_svc_obj_generate_key_rsa(o, type_props, key_size, 2355 params, param_count); 2356 if (res != TEE_SUCCESS) 2357 goto out; 2358 break; 2359 2360 case TEE_TYPE_DSA_KEYPAIR: 2361 res = tee_svc_obj_generate_key_dsa(o, type_props, key_size, 2362 params, param_count); 2363 if (res != TEE_SUCCESS) 2364 goto out; 2365 break; 2366 2367 case TEE_TYPE_DH_KEYPAIR: 2368 res = tee_svc_obj_generate_key_dh(o, type_props, key_size, 2369 params, param_count); 2370 if (res != TEE_SUCCESS) 2371 goto out; 2372 break; 2373 2374 case TEE_TYPE_ECDSA_KEYPAIR: 2375 case TEE_TYPE_ECDH_KEYPAIR: 2376 case TEE_TYPE_SM2_DSA_KEYPAIR: 2377 case TEE_TYPE_SM2_KEP_KEYPAIR: 2378 case TEE_TYPE_SM2_PKE_KEYPAIR: 2379 res = tee_svc_obj_generate_key_ecc(o, type_props, key_size, 2380 params, param_count); 2381 if (res != TEE_SUCCESS) 2382 goto out; 2383 break; 2384 2385 case TEE_TYPE_X25519_KEYPAIR: 2386 res = tee_svc_obj_generate_key_x25519(o, type_props, key_size, 2387 params, param_count); 2388 if (res != TEE_SUCCESS) 2389 goto out; 2390 break; 2391 2392 case TEE_TYPE_ED25519_KEYPAIR: 2393 res = tee_svc_obj_generate_key_ed25519(o, type_props, key_size, 2394 params, param_count); 2395 if (res != TEE_SUCCESS) 2396 goto out; 2397 break; 2398 2399 default: 2400 res = TEE_ERROR_BAD_FORMAT; 2401 } 2402 2403 out: 2404 free_wipe(params); 2405 if (res == TEE_SUCCESS) { 2406 o->info.keySize = key_size; 2407 o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 2408 } 2409 return res; 2410 } 2411 2412 static TEE_Result tee_svc_cryp_get_state(struct ts_session *sess, 2413 vaddr_t state_id, 2414 struct tee_cryp_state **state) 2415 { 2416 struct tee_cryp_state *s; 2417 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 2418 2419 TAILQ_FOREACH(s, &utc->cryp_states, link) { 2420 if (state_id == (vaddr_t)s) { 2421 *state = s; 2422 return TEE_SUCCESS; 2423 } 2424 } 2425 return TEE_ERROR_BAD_PARAMETERS; 2426 } 2427 2428 static void cryp_state_free(struct user_ta_ctx *utc, struct tee_cryp_state *cs) 2429 { 2430 struct tee_obj *o; 2431 2432 if (tee_obj_get(utc, cs->key1, &o) == TEE_SUCCESS) 2433 tee_obj_close(utc, o); 2434 if (tee_obj_get(utc, cs->key2, &o) == TEE_SUCCESS) 2435 tee_obj_close(utc, o); 2436 2437 TAILQ_REMOVE(&utc->cryp_states, cs, link); 2438 if (cs->ctx_finalize != NULL) 2439 cs->ctx_finalize(cs->ctx); 2440 2441 switch (TEE_ALG_GET_CLASS(cs->algo)) { 2442 case TEE_OPERATION_CIPHER: 2443 crypto_cipher_free_ctx(cs->ctx); 2444 break; 2445 case TEE_OPERATION_AE: 2446 crypto_authenc_free_ctx(cs->ctx); 2447 break; 2448 case TEE_OPERATION_DIGEST: 2449 crypto_hash_free_ctx(cs->ctx); 2450 break; 2451 case TEE_OPERATION_MAC: 2452 crypto_mac_free_ctx(cs->ctx); 2453 break; 2454 default: 2455 assert(!cs->ctx); 2456 } 2457 2458 free(cs); 2459 } 2460 2461 static TEE_Result tee_svc_cryp_check_key_type(const struct tee_obj *o, 2462 uint32_t algo, 2463 TEE_OperationMode mode) 2464 { 2465 uint32_t req_key_type; 2466 uint32_t req_key_type2 = 0; 2467 2468 switch (TEE_ALG_GET_MAIN_ALG(algo)) { 2469 case TEE_MAIN_ALGO_MD5: 2470 req_key_type = TEE_TYPE_HMAC_MD5; 2471 break; 2472 case TEE_MAIN_ALGO_SHA1: 2473 req_key_type = TEE_TYPE_HMAC_SHA1; 2474 break; 2475 case TEE_MAIN_ALGO_SHA224: 2476 req_key_type = TEE_TYPE_HMAC_SHA224; 2477 break; 2478 case TEE_MAIN_ALGO_SHA256: 2479 req_key_type = TEE_TYPE_HMAC_SHA256; 2480 break; 2481 case TEE_MAIN_ALGO_SHA384: 2482 req_key_type = TEE_TYPE_HMAC_SHA384; 2483 break; 2484 case TEE_MAIN_ALGO_SHA512: 2485 req_key_type = TEE_TYPE_HMAC_SHA512; 2486 break; 2487 case TEE_MAIN_ALGO_SM3: 2488 req_key_type = TEE_TYPE_HMAC_SM3; 2489 break; 2490 case TEE_MAIN_ALGO_AES: 2491 req_key_type = TEE_TYPE_AES; 2492 break; 2493 case TEE_MAIN_ALGO_DES: 2494 req_key_type = TEE_TYPE_DES; 2495 break; 2496 case TEE_MAIN_ALGO_DES3: 2497 req_key_type = TEE_TYPE_DES3; 2498 break; 2499 case TEE_MAIN_ALGO_SM4: 2500 req_key_type = TEE_TYPE_SM4; 2501 break; 2502 case TEE_MAIN_ALGO_RSA: 2503 req_key_type = TEE_TYPE_RSA_KEYPAIR; 2504 if (mode == TEE_MODE_ENCRYPT || mode == TEE_MODE_VERIFY) 2505 req_key_type2 = TEE_TYPE_RSA_PUBLIC_KEY; 2506 break; 2507 case TEE_MAIN_ALGO_DSA: 2508 req_key_type = TEE_TYPE_DSA_KEYPAIR; 2509 if (mode == TEE_MODE_ENCRYPT || mode == TEE_MODE_VERIFY) 2510 req_key_type2 = TEE_TYPE_DSA_PUBLIC_KEY; 2511 break; 2512 case TEE_MAIN_ALGO_DH: 2513 req_key_type = TEE_TYPE_DH_KEYPAIR; 2514 break; 2515 case TEE_MAIN_ALGO_ECDSA: 2516 req_key_type = TEE_TYPE_ECDSA_KEYPAIR; 2517 if (mode == TEE_MODE_VERIFY) 2518 req_key_type2 = TEE_TYPE_ECDSA_PUBLIC_KEY; 2519 break; 2520 case TEE_MAIN_ALGO_ECDH: 2521 req_key_type = TEE_TYPE_ECDH_KEYPAIR; 2522 break; 2523 case TEE_MAIN_ALGO_ED25519: 2524 req_key_type = TEE_TYPE_ED25519_KEYPAIR; 2525 if (mode == TEE_MODE_VERIFY) 2526 req_key_type2 = TEE_TYPE_ED25519_PUBLIC_KEY; 2527 break; 2528 case TEE_MAIN_ALGO_SM2_PKE: 2529 if (mode == TEE_MODE_ENCRYPT) 2530 req_key_type = TEE_TYPE_SM2_PKE_PUBLIC_KEY; 2531 else 2532 req_key_type = TEE_TYPE_SM2_PKE_KEYPAIR; 2533 break; 2534 case TEE_MAIN_ALGO_SM2_DSA_SM3: 2535 if (mode == TEE_MODE_VERIFY) 2536 req_key_type = TEE_TYPE_SM2_DSA_PUBLIC_KEY; 2537 else 2538 req_key_type = TEE_TYPE_SM2_DSA_KEYPAIR; 2539 break; 2540 #if defined(CFG_CRYPTO_SM2_KEP) 2541 case TEE_MAIN_ALGO_SM2_KEP: 2542 req_key_type = TEE_TYPE_SM2_KEP_KEYPAIR; 2543 req_key_type2 = TEE_TYPE_SM2_KEP_PUBLIC_KEY; 2544 break; 2545 #endif 2546 #if defined(CFG_CRYPTO_HKDF) 2547 case TEE_MAIN_ALGO_HKDF: 2548 req_key_type = TEE_TYPE_HKDF_IKM; 2549 break; 2550 #endif 2551 #if defined(CFG_CRYPTO_CONCAT_KDF) 2552 case TEE_MAIN_ALGO_CONCAT_KDF: 2553 req_key_type = TEE_TYPE_CONCAT_KDF_Z; 2554 break; 2555 #endif 2556 #if defined(CFG_CRYPTO_PBKDF2) 2557 case TEE_MAIN_ALGO_PBKDF2: 2558 req_key_type = TEE_TYPE_PBKDF2_PASSWORD; 2559 break; 2560 #endif 2561 case TEE_MAIN_ALGO_X25519: 2562 req_key_type = TEE_TYPE_X25519_KEYPAIR; 2563 break; 2564 default: 2565 return TEE_ERROR_BAD_PARAMETERS; 2566 } 2567 2568 if (req_key_type != o->info.objectType && 2569 req_key_type2 != o->info.objectType) 2570 return TEE_ERROR_BAD_PARAMETERS; 2571 return TEE_SUCCESS; 2572 } 2573 2574 TEE_Result syscall_cryp_state_alloc(unsigned long algo, unsigned long mode, 2575 unsigned long key1, unsigned long key2, 2576 uint32_t *state) 2577 { 2578 struct ts_session *sess = ts_get_current_session(); 2579 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 2580 TEE_Result res = TEE_SUCCESS; 2581 struct tee_cryp_state *cs = NULL; 2582 struct tee_obj *o1 = NULL; 2583 struct tee_obj *o2 = NULL; 2584 2585 if (key1 != 0) { 2586 res = tee_obj_get(utc, uref_to_vaddr(key1), &o1); 2587 if (res != TEE_SUCCESS) 2588 return res; 2589 if (o1->busy) 2590 return TEE_ERROR_BAD_PARAMETERS; 2591 res = tee_svc_cryp_check_key_type(o1, algo, mode); 2592 if (res != TEE_SUCCESS) 2593 return res; 2594 } 2595 if (key2 != 0) { 2596 res = tee_obj_get(utc, uref_to_vaddr(key2), &o2); 2597 if (res != TEE_SUCCESS) 2598 return res; 2599 if (o2->busy) 2600 return TEE_ERROR_BAD_PARAMETERS; 2601 res = tee_svc_cryp_check_key_type(o2, algo, mode); 2602 if (res != TEE_SUCCESS) 2603 return res; 2604 } 2605 2606 cs = calloc(1, sizeof(struct tee_cryp_state)); 2607 if (!cs) 2608 return TEE_ERROR_OUT_OF_MEMORY; 2609 TAILQ_INSERT_TAIL(&utc->cryp_states, cs, link); 2610 cs->algo = algo; 2611 cs->mode = mode; 2612 cs->state = CRYP_STATE_UNINITIALIZED; 2613 2614 switch (TEE_ALG_GET_CLASS(algo)) { 2615 case TEE_OPERATION_CIPHER: 2616 if ((algo == TEE_ALG_AES_XTS && (key1 == 0 || key2 == 0)) || 2617 (algo != TEE_ALG_AES_XTS && (key1 == 0 || key2 != 0))) { 2618 res = TEE_ERROR_BAD_PARAMETERS; 2619 } else { 2620 res = crypto_cipher_alloc_ctx(&cs->ctx, algo); 2621 if (res != TEE_SUCCESS) 2622 break; 2623 } 2624 break; 2625 case TEE_OPERATION_AE: 2626 if (key1 == 0 || key2 != 0) { 2627 res = TEE_ERROR_BAD_PARAMETERS; 2628 } else { 2629 res = crypto_authenc_alloc_ctx(&cs->ctx, algo); 2630 if (res != TEE_SUCCESS) 2631 break; 2632 } 2633 break; 2634 case TEE_OPERATION_MAC: 2635 if (key1 == 0 || key2 != 0) { 2636 res = TEE_ERROR_BAD_PARAMETERS; 2637 } else { 2638 res = crypto_mac_alloc_ctx(&cs->ctx, algo); 2639 if (res != TEE_SUCCESS) 2640 break; 2641 } 2642 break; 2643 case TEE_OPERATION_DIGEST: 2644 if (key1 != 0 || key2 != 0) { 2645 res = TEE_ERROR_BAD_PARAMETERS; 2646 } else { 2647 res = crypto_hash_alloc_ctx(&cs->ctx, algo); 2648 if (res != TEE_SUCCESS) 2649 break; 2650 } 2651 break; 2652 case TEE_OPERATION_ASYMMETRIC_CIPHER: 2653 case TEE_OPERATION_ASYMMETRIC_SIGNATURE: 2654 if (algo == TEE_ALG_RSASSA_PKCS1_V1_5 && 2655 !IS_ENABLED(CFG_CRYPTO_RSASSA_NA1)) { 2656 res = TEE_ERROR_NOT_SUPPORTED; 2657 break; 2658 } 2659 if (key1 == 0 || key2 != 0) 2660 res = TEE_ERROR_BAD_PARAMETERS; 2661 break; 2662 case TEE_OPERATION_KEY_DERIVATION: 2663 if (algo == TEE_ALG_SM2_KEP) { 2664 if (key1 == 0 || key2 == 0) 2665 res = TEE_ERROR_BAD_PARAMETERS; 2666 } else { 2667 if (key1 == 0 || key2 != 0) 2668 res = TEE_ERROR_BAD_PARAMETERS; 2669 } 2670 break; 2671 default: 2672 res = TEE_ERROR_NOT_SUPPORTED; 2673 break; 2674 } 2675 if (res != TEE_SUCCESS) 2676 goto out; 2677 2678 res = copy_kaddr_to_uref(state, cs); 2679 if (res != TEE_SUCCESS) 2680 goto out; 2681 2682 /* Register keys */ 2683 if (o1 != NULL) { 2684 o1->busy = true; 2685 cs->key1 = (vaddr_t)o1; 2686 } 2687 if (o2 != NULL) { 2688 o2->busy = true; 2689 cs->key2 = (vaddr_t)o2; 2690 } 2691 2692 out: 2693 if (res != TEE_SUCCESS) 2694 cryp_state_free(utc, cs); 2695 return res; 2696 } 2697 2698 TEE_Result syscall_cryp_state_copy(unsigned long dst, unsigned long src) 2699 { 2700 struct ts_session *sess = ts_get_current_session(); 2701 TEE_Result res = TEE_SUCCESS; 2702 struct tee_cryp_state *cs_dst = NULL; 2703 struct tee_cryp_state *cs_src = NULL; 2704 2705 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(dst), &cs_dst); 2706 if (res != TEE_SUCCESS) 2707 return res; 2708 2709 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(src), &cs_src); 2710 if (res != TEE_SUCCESS) 2711 return res; 2712 if (cs_dst->algo != cs_src->algo || cs_dst->mode != cs_src->mode) 2713 return TEE_ERROR_BAD_PARAMETERS; 2714 2715 switch (TEE_ALG_GET_CLASS(cs_src->algo)) { 2716 case TEE_OPERATION_CIPHER: 2717 crypto_cipher_copy_state(cs_dst->ctx, cs_src->ctx); 2718 break; 2719 case TEE_OPERATION_AE: 2720 crypto_authenc_copy_state(cs_dst->ctx, cs_src->ctx); 2721 break; 2722 case TEE_OPERATION_DIGEST: 2723 crypto_hash_copy_state(cs_dst->ctx, cs_src->ctx); 2724 break; 2725 case TEE_OPERATION_MAC: 2726 crypto_mac_copy_state(cs_dst->ctx, cs_src->ctx); 2727 break; 2728 default: 2729 return TEE_ERROR_BAD_STATE; 2730 } 2731 2732 cs_dst->state = cs_src->state; 2733 cs_dst->ctx_finalize = cs_src->ctx_finalize; 2734 2735 return TEE_SUCCESS; 2736 } 2737 2738 void tee_svc_cryp_free_states(struct user_ta_ctx *utc) 2739 { 2740 struct tee_cryp_state_head *states = &utc->cryp_states; 2741 2742 while (!TAILQ_EMPTY(states)) 2743 cryp_state_free(utc, TAILQ_FIRST(states)); 2744 } 2745 2746 TEE_Result syscall_cryp_state_free(unsigned long state) 2747 { 2748 struct ts_session *sess = ts_get_current_session(); 2749 TEE_Result res = TEE_SUCCESS; 2750 struct tee_cryp_state *cs = NULL; 2751 2752 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2753 if (res != TEE_SUCCESS) 2754 return res; 2755 cryp_state_free(to_user_ta_ctx(sess->ctx), cs); 2756 return TEE_SUCCESS; 2757 } 2758 2759 TEE_Result syscall_hash_init(unsigned long state, 2760 const void *iv __maybe_unused, 2761 size_t iv_len __maybe_unused) 2762 { 2763 struct ts_session *sess = ts_get_current_session(); 2764 TEE_Result res = TEE_SUCCESS; 2765 struct tee_cryp_state *cs = NULL; 2766 2767 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2768 if (res != TEE_SUCCESS) 2769 return res; 2770 2771 switch (TEE_ALG_GET_CLASS(cs->algo)) { 2772 case TEE_OPERATION_DIGEST: 2773 res = crypto_hash_init(cs->ctx); 2774 if (res != TEE_SUCCESS) 2775 return res; 2776 break; 2777 case TEE_OPERATION_MAC: 2778 { 2779 struct tee_obj *o; 2780 struct tee_cryp_obj_secret *key; 2781 2782 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 2783 cs->key1, &o); 2784 if (res != TEE_SUCCESS) 2785 return res; 2786 if ((o->info.handleFlags & 2787 TEE_HANDLE_FLAG_INITIALIZED) == 0) 2788 return TEE_ERROR_BAD_PARAMETERS; 2789 2790 key = (struct tee_cryp_obj_secret *)o->attr; 2791 res = crypto_mac_init(cs->ctx, (void *)(key + 1), 2792 key->key_size); 2793 if (res != TEE_SUCCESS) 2794 return res; 2795 break; 2796 } 2797 default: 2798 return TEE_ERROR_BAD_PARAMETERS; 2799 } 2800 2801 cs->state = CRYP_STATE_INITIALIZED; 2802 2803 return TEE_SUCCESS; 2804 } 2805 2806 TEE_Result syscall_hash_update(unsigned long state, const void *chunk, 2807 size_t chunk_size) 2808 { 2809 struct ts_session *sess = ts_get_current_session(); 2810 struct tee_cryp_state *cs = NULL; 2811 TEE_Result res = TEE_SUCCESS; 2812 2813 /* No data, but size provided isn't valid parameters. */ 2814 if (!chunk && chunk_size) 2815 return TEE_ERROR_BAD_PARAMETERS; 2816 2817 /* Zero length hash is valid, but nothing we need to do. */ 2818 if (!chunk_size) 2819 return TEE_SUCCESS; 2820 2821 chunk = memtag_strip_tag_const(chunk); 2822 2823 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 2824 TEE_MEMORY_ACCESS_READ | 2825 TEE_MEMORY_ACCESS_ANY_OWNER, 2826 (uaddr_t)chunk, chunk_size); 2827 if (res != TEE_SUCCESS) 2828 return res; 2829 2830 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2831 if (res != TEE_SUCCESS) 2832 return res; 2833 2834 if (cs->state != CRYP_STATE_INITIALIZED) 2835 return TEE_ERROR_BAD_STATE; 2836 2837 switch (TEE_ALG_GET_CLASS(cs->algo)) { 2838 case TEE_OPERATION_DIGEST: 2839 res = crypto_hash_update(cs->ctx, chunk, chunk_size); 2840 if (res != TEE_SUCCESS) 2841 return res; 2842 break; 2843 case TEE_OPERATION_MAC: 2844 res = crypto_mac_update(cs->ctx, chunk, chunk_size); 2845 if (res != TEE_SUCCESS) 2846 return res; 2847 break; 2848 default: 2849 return TEE_ERROR_BAD_PARAMETERS; 2850 } 2851 2852 return TEE_SUCCESS; 2853 } 2854 2855 TEE_Result syscall_hash_final(unsigned long state, const void *chunk, 2856 size_t chunk_size, void *hash, uint64_t *hash_len) 2857 { 2858 struct ts_session *sess = ts_get_current_session(); 2859 struct tee_cryp_state *cs = NULL; 2860 TEE_Result res2 = TEE_SUCCESS; 2861 TEE_Result res = TEE_SUCCESS; 2862 size_t hash_size = 0; 2863 size_t hlen = 0; 2864 2865 /* No data, but size provided isn't valid parameters. */ 2866 if (!chunk && chunk_size) 2867 return TEE_ERROR_BAD_PARAMETERS; 2868 2869 chunk = memtag_strip_tag_const(chunk); 2870 hash = memtag_strip_tag(hash); 2871 2872 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 2873 TEE_MEMORY_ACCESS_READ | 2874 TEE_MEMORY_ACCESS_ANY_OWNER, 2875 (uaddr_t)chunk, chunk_size); 2876 if (res != TEE_SUCCESS) 2877 return res; 2878 2879 res = get_user_u64_as_size_t(&hlen, hash_len); 2880 if (res != TEE_SUCCESS) 2881 return res; 2882 2883 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 2884 TEE_MEMORY_ACCESS_READ | 2885 TEE_MEMORY_ACCESS_WRITE | 2886 TEE_MEMORY_ACCESS_ANY_OWNER, 2887 (uaddr_t)hash, hlen); 2888 if (res != TEE_SUCCESS) 2889 return res; 2890 2891 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2892 if (res != TEE_SUCCESS) 2893 return res; 2894 2895 if (cs->state != CRYP_STATE_INITIALIZED) 2896 return TEE_ERROR_BAD_STATE; 2897 2898 switch (TEE_ALG_GET_CLASS(cs->algo)) { 2899 case TEE_OPERATION_DIGEST: 2900 res = tee_alg_get_digest_size(cs->algo, &hash_size); 2901 if (res != TEE_SUCCESS) 2902 return res; 2903 if (hlen < hash_size) { 2904 res = TEE_ERROR_SHORT_BUFFER; 2905 goto out; 2906 } 2907 2908 if (chunk_size) { 2909 res = crypto_hash_update(cs->ctx, chunk, chunk_size); 2910 if (res != TEE_SUCCESS) 2911 return res; 2912 } 2913 2914 res = crypto_hash_final(cs->ctx, hash, hash_size); 2915 if (res != TEE_SUCCESS) 2916 return res; 2917 break; 2918 2919 case TEE_OPERATION_MAC: 2920 res = tee_alg_get_digest_size(cs->algo, &hash_size); 2921 if (res != TEE_SUCCESS) 2922 return res; 2923 if (hlen < hash_size) { 2924 res = TEE_ERROR_SHORT_BUFFER; 2925 goto out; 2926 } 2927 2928 if (chunk_size) { 2929 res = crypto_mac_update(cs->ctx, chunk, chunk_size); 2930 if (res != TEE_SUCCESS) 2931 return res; 2932 } 2933 2934 res = crypto_mac_final(cs->ctx, hash, hash_size); 2935 if (res != TEE_SUCCESS) 2936 return res; 2937 break; 2938 2939 default: 2940 return TEE_ERROR_BAD_PARAMETERS; 2941 } 2942 out: 2943 res2 = put_user_u64(hash_len, hash_size); 2944 if (res2 != TEE_SUCCESS) 2945 return res2; 2946 return res; 2947 } 2948 2949 TEE_Result syscall_cipher_init(unsigned long state, const void *iv, 2950 size_t iv_len) 2951 { 2952 struct ts_session *sess = ts_get_current_session(); 2953 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 2954 struct tee_cryp_obj_secret *key1 = NULL; 2955 struct tee_cryp_state *cs = NULL; 2956 TEE_Result res = TEE_SUCCESS; 2957 struct tee_obj *o = NULL; 2958 2959 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 2960 if (res != TEE_SUCCESS) 2961 return res; 2962 2963 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_CIPHER) 2964 return TEE_ERROR_BAD_STATE; 2965 2966 iv = memtag_strip_tag_const(iv); 2967 2968 res = vm_check_access_rights(&utc->uctx, 2969 TEE_MEMORY_ACCESS_READ | 2970 TEE_MEMORY_ACCESS_ANY_OWNER, 2971 (uaddr_t)iv, iv_len); 2972 if (res != TEE_SUCCESS) 2973 return res; 2974 2975 res = tee_obj_get(utc, cs->key1, &o); 2976 if (res != TEE_SUCCESS) 2977 return res; 2978 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 2979 return TEE_ERROR_BAD_PARAMETERS; 2980 2981 key1 = o->attr; 2982 2983 if (tee_obj_get(utc, cs->key2, &o) == TEE_SUCCESS) { 2984 struct tee_cryp_obj_secret *key2 = o->attr; 2985 2986 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 2987 return TEE_ERROR_BAD_PARAMETERS; 2988 2989 res = crypto_cipher_init(cs->ctx, cs->mode, 2990 (uint8_t *)(key1 + 1), key1->key_size, 2991 (uint8_t *)(key2 + 1), key2->key_size, 2992 iv, iv_len); 2993 } else { 2994 res = crypto_cipher_init(cs->ctx, cs->mode, 2995 (uint8_t *)(key1 + 1), key1->key_size, 2996 NULL, 0, iv, iv_len); 2997 } 2998 if (res != TEE_SUCCESS) 2999 return res; 3000 3001 cs->ctx_finalize = crypto_cipher_final; 3002 cs->state = CRYP_STATE_INITIALIZED; 3003 3004 return TEE_SUCCESS; 3005 } 3006 3007 static TEE_Result tee_svc_cipher_update_helper(unsigned long state, 3008 bool last_block, const void *src, size_t src_len, 3009 void *dst, uint64_t *dst_len) 3010 { 3011 struct ts_session *sess = ts_get_current_session(); 3012 struct tee_cryp_state *cs = NULL; 3013 TEE_Result res = TEE_SUCCESS; 3014 size_t dlen = 0; 3015 3016 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3017 if (res != TEE_SUCCESS) 3018 return res; 3019 3020 if (cs->state != CRYP_STATE_INITIALIZED) 3021 return TEE_ERROR_BAD_STATE; 3022 3023 src = memtag_strip_tag_const(src); 3024 dst = memtag_strip_tag(dst); 3025 3026 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3027 TEE_MEMORY_ACCESS_READ | 3028 TEE_MEMORY_ACCESS_ANY_OWNER, 3029 (uaddr_t)src, src_len); 3030 if (res != TEE_SUCCESS) 3031 return res; 3032 3033 if (!dst_len) { 3034 dlen = 0; 3035 } else { 3036 struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; 3037 uint32_t flags = TEE_MEMORY_ACCESS_READ | 3038 TEE_MEMORY_ACCESS_WRITE | 3039 TEE_MEMORY_ACCESS_ANY_OWNER; 3040 3041 res = get_user_u64_as_size_t(&dlen, dst_len); 3042 if (res != TEE_SUCCESS) 3043 return res; 3044 3045 res = vm_check_access_rights(uctx, flags, (uaddr_t)dst, dlen); 3046 if (res != TEE_SUCCESS) 3047 return res; 3048 } 3049 3050 if (dlen < src_len) { 3051 res = TEE_ERROR_SHORT_BUFFER; 3052 goto out; 3053 } 3054 3055 if (src_len > 0) { 3056 /* Permit src_len == 0 to finalize the operation */ 3057 res = tee_do_cipher_update(cs->ctx, cs->algo, cs->mode, 3058 last_block, src, src_len, dst); 3059 } 3060 3061 if (last_block && cs->ctx_finalize != NULL) { 3062 cs->ctx_finalize(cs->ctx); 3063 cs->ctx_finalize = NULL; 3064 } 3065 3066 out: 3067 if ((res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) && 3068 dst_len != NULL) { 3069 TEE_Result res2; 3070 3071 res2 = put_user_u64(dst_len, src_len); 3072 if (res2 != TEE_SUCCESS) 3073 res = res2; 3074 } 3075 3076 return res; 3077 } 3078 3079 TEE_Result syscall_cipher_update(unsigned long state, const void *src, 3080 size_t src_len, void *dst, uint64_t *dst_len) 3081 { 3082 return tee_svc_cipher_update_helper(state, false /* last_block */, 3083 src, src_len, dst, dst_len); 3084 } 3085 3086 TEE_Result syscall_cipher_final(unsigned long state, const void *src, 3087 size_t src_len, void *dst, uint64_t *dst_len) 3088 { 3089 return tee_svc_cipher_update_helper(state, true /* last_block */, 3090 src, src_len, dst, dst_len); 3091 } 3092 3093 #if defined(CFG_CRYPTO_HKDF) 3094 static TEE_Result get_hkdf_params(const TEE_Attribute *params, 3095 uint32_t param_count, 3096 void **salt, size_t *salt_len, void **info, 3097 size_t *info_len, size_t *okm_len) 3098 { 3099 size_t n; 3100 enum { SALT = 0x1, LENGTH = 0x2, INFO = 0x4 }; 3101 uint8_t found = 0; 3102 3103 *salt = *info = NULL; 3104 *salt_len = *info_len = *okm_len = 0; 3105 3106 for (n = 0; n < param_count; n++) { 3107 switch (params[n].attributeID) { 3108 case TEE_ATTR_HKDF_SALT: 3109 if (!(found & SALT)) { 3110 *salt = params[n].content.ref.buffer; 3111 *salt_len = params[n].content.ref.length; 3112 found |= SALT; 3113 } 3114 break; 3115 case TEE_ATTR_HKDF_OKM_LENGTH: 3116 if (!(found & LENGTH)) { 3117 *okm_len = params[n].content.value.a; 3118 found |= LENGTH; 3119 } 3120 break; 3121 case TEE_ATTR_HKDF_INFO: 3122 if (!(found & INFO)) { 3123 *info = params[n].content.ref.buffer; 3124 *info_len = params[n].content.ref.length; 3125 found |= INFO; 3126 } 3127 break; 3128 default: 3129 /* Unexpected attribute */ 3130 return TEE_ERROR_BAD_PARAMETERS; 3131 } 3132 3133 } 3134 3135 if (!(found & LENGTH)) 3136 return TEE_ERROR_BAD_PARAMETERS; 3137 3138 return TEE_SUCCESS; 3139 } 3140 #endif 3141 3142 #if defined(CFG_CRYPTO_CONCAT_KDF) 3143 static TEE_Result get_concat_kdf_params(const TEE_Attribute *params, 3144 uint32_t param_count, 3145 void **other_info, 3146 size_t *other_info_len, 3147 size_t *derived_key_len) 3148 { 3149 size_t n; 3150 enum { LENGTH = 0x1, INFO = 0x2 }; 3151 uint8_t found = 0; 3152 3153 *other_info = NULL; 3154 *other_info_len = *derived_key_len = 0; 3155 3156 for (n = 0; n < param_count; n++) { 3157 switch (params[n].attributeID) { 3158 case TEE_ATTR_CONCAT_KDF_OTHER_INFO: 3159 if (!(found & INFO)) { 3160 *other_info = params[n].content.ref.buffer; 3161 *other_info_len = params[n].content.ref.length; 3162 found |= INFO; 3163 } 3164 break; 3165 case TEE_ATTR_CONCAT_KDF_DKM_LENGTH: 3166 if (!(found & LENGTH)) { 3167 *derived_key_len = params[n].content.value.a; 3168 found |= LENGTH; 3169 } 3170 break; 3171 default: 3172 /* Unexpected attribute */ 3173 return TEE_ERROR_BAD_PARAMETERS; 3174 } 3175 } 3176 3177 if (!(found & LENGTH)) 3178 return TEE_ERROR_BAD_PARAMETERS; 3179 3180 return TEE_SUCCESS; 3181 } 3182 #endif 3183 3184 #if defined(CFG_CRYPTO_PBKDF2) 3185 static TEE_Result get_pbkdf2_params(const TEE_Attribute *params, 3186 uint32_t param_count, void **salt, 3187 size_t *salt_len, size_t *derived_key_len, 3188 size_t *iteration_count) 3189 { 3190 size_t n; 3191 enum { SALT = 0x1, LENGTH = 0x2, COUNT = 0x4 }; 3192 uint8_t found = 0; 3193 3194 *salt = NULL; 3195 *salt_len = *derived_key_len = *iteration_count = 0; 3196 3197 for (n = 0; n < param_count; n++) { 3198 switch (params[n].attributeID) { 3199 case TEE_ATTR_PBKDF2_SALT: 3200 if (!(found & SALT)) { 3201 *salt = params[n].content.ref.buffer; 3202 *salt_len = params[n].content.ref.length; 3203 found |= SALT; 3204 } 3205 break; 3206 case TEE_ATTR_PBKDF2_DKM_LENGTH: 3207 if (!(found & LENGTH)) { 3208 *derived_key_len = params[n].content.value.a; 3209 found |= LENGTH; 3210 } 3211 break; 3212 case TEE_ATTR_PBKDF2_ITERATION_COUNT: 3213 if (!(found & COUNT)) { 3214 *iteration_count = params[n].content.value.a; 3215 found |= COUNT; 3216 } 3217 break; 3218 default: 3219 /* Unexpected attribute */ 3220 return TEE_ERROR_BAD_PARAMETERS; 3221 } 3222 } 3223 3224 if ((found & (LENGTH|COUNT)) != (LENGTH|COUNT)) 3225 return TEE_ERROR_BAD_PARAMETERS; 3226 3227 return TEE_SUCCESS; 3228 } 3229 #endif 3230 3231 #if defined(CFG_CRYPTO_SM2_KEP) 3232 static TEE_Result get_sm2_kep_params(const TEE_Attribute *params, 3233 uint32_t param_count, 3234 struct ecc_public_key *peer_key, 3235 struct ecc_public_key *peer_eph_key, 3236 struct sm2_kep_parms *kep_parms) 3237 { 3238 TEE_Result res = TEE_ERROR_GENERIC; 3239 size_t n; 3240 enum { 3241 IS_INITIATOR, 3242 PEER_KEY_X, 3243 PEER_KEY_Y, 3244 PEER_EPH_KEY_X, 3245 PEER_EPH_KEY_Y, 3246 INITIATOR_ID, 3247 RESPONDER_ID, 3248 }; 3249 uint8_t mandatory = BIT(IS_INITIATOR) | BIT(PEER_KEY_X) | 3250 BIT(PEER_KEY_Y) | BIT(PEER_EPH_KEY_X) | BIT(PEER_EPH_KEY_Y) | 3251 BIT(INITIATOR_ID) | BIT(RESPONDER_ID); 3252 uint8_t found = 0; 3253 3254 res = crypto_acipher_alloc_ecc_public_key(peer_key, 3255 TEE_TYPE_SM2_KEP_PUBLIC_KEY, 3256 256); 3257 if (res) 3258 return res; 3259 3260 res = crypto_acipher_alloc_ecc_public_key(peer_eph_key, 3261 TEE_TYPE_SM2_KEP_PUBLIC_KEY, 3262 256); 3263 if (res) 3264 goto out_p; 3265 3266 peer_key->curve = TEE_ECC_CURVE_SM2; 3267 peer_eph_key->curve = TEE_ECC_CURVE_SM2; 3268 3269 for (n = 0; n < param_count; n++) { 3270 const TEE_Attribute *p = ¶ms[n]; 3271 3272 switch (p->attributeID) { 3273 case TEE_ATTR_SM2_KEP_USER: 3274 kep_parms->is_initiator = !p->content.value.a; 3275 found |= BIT(IS_INITIATOR); 3276 break; 3277 case TEE_ATTR_ECC_PUBLIC_VALUE_X: 3278 crypto_bignum_bin2bn(p->content.ref.buffer, 3279 p->content.ref.length, 3280 peer_key->x); 3281 found |= BIT(PEER_KEY_X); 3282 break; 3283 case TEE_ATTR_ECC_PUBLIC_VALUE_Y: 3284 crypto_bignum_bin2bn(p->content.ref.buffer, 3285 p->content.ref.length, 3286 peer_key->y); 3287 found |= BIT(PEER_KEY_Y); 3288 break; 3289 case TEE_ATTR_ECC_EPHEMERAL_PUBLIC_VALUE_X: 3290 crypto_bignum_bin2bn(p->content.ref.buffer, 3291 p->content.ref.length, 3292 peer_eph_key->x); 3293 found |= BIT(PEER_EPH_KEY_X); 3294 break; 3295 case TEE_ATTR_ECC_EPHEMERAL_PUBLIC_VALUE_Y: 3296 crypto_bignum_bin2bn(p->content.ref.buffer, 3297 p->content.ref.length, 3298 peer_eph_key->y); 3299 found |= BIT(PEER_EPH_KEY_Y); 3300 break; 3301 case TEE_ATTR_SM2_ID_INITIATOR: 3302 kep_parms->initiator_id = p->content.ref.buffer; 3303 kep_parms->initiator_id_len = p->content.ref.length; 3304 found |= BIT(INITIATOR_ID); 3305 break; 3306 case TEE_ATTR_SM2_ID_RESPONDER: 3307 kep_parms->responder_id = p->content.ref.buffer; 3308 kep_parms->responder_id_len = p->content.ref.length; 3309 found |= BIT(RESPONDER_ID); 3310 break; 3311 case TEE_ATTR_SM2_KEP_CONFIRMATION_IN: 3312 kep_parms->conf_in = p->content.ref.buffer; 3313 kep_parms->conf_in_len = p->content.ref.length; 3314 break; 3315 case TEE_ATTR_SM2_KEP_CONFIRMATION_OUT: 3316 kep_parms->conf_out = p->content.ref.buffer; 3317 kep_parms->conf_out_len = p->content.ref.length; 3318 break; 3319 default: 3320 /* Unexpected attribute */ 3321 res = TEE_ERROR_BAD_PARAMETERS; 3322 goto out; 3323 } 3324 } 3325 3326 if ((found & mandatory) != mandatory) { 3327 res = TEE_ERROR_BAD_PARAMETERS; 3328 goto out; 3329 } 3330 3331 return TEE_SUCCESS; 3332 out: 3333 crypto_acipher_free_ecc_public_key(peer_eph_key); 3334 out_p: 3335 crypto_acipher_free_ecc_public_key(peer_key); 3336 return res; 3337 } 3338 #endif 3339 3340 TEE_Result syscall_cryp_derive_key(unsigned long state, 3341 const struct utee_attribute *usr_params, 3342 unsigned long param_count, unsigned long derived_key) 3343 { 3344 struct ts_session *sess = ts_get_current_session(); 3345 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 3346 TEE_Result res = TEE_ERROR_NOT_SUPPORTED; 3347 struct tee_obj *ko = NULL; 3348 struct tee_obj *so = NULL; 3349 struct tee_cryp_state *cs = NULL; 3350 struct tee_cryp_obj_secret *sk = NULL; 3351 const struct tee_cryp_obj_type_props *type_props = NULL; 3352 TEE_Attribute *params = NULL; 3353 size_t alloc_size = 0; 3354 3355 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3356 if (res != TEE_SUCCESS) 3357 return res; 3358 3359 if (MUL_OVERFLOW(sizeof(TEE_Attribute), param_count, &alloc_size)) 3360 return TEE_ERROR_OVERFLOW; 3361 3362 params = malloc(alloc_size); 3363 if (!params) 3364 return TEE_ERROR_OUT_OF_MEMORY; 3365 res = copy_in_attrs(utc, usr_params, param_count, params); 3366 if (res != TEE_SUCCESS) 3367 goto out; 3368 3369 /* Get key set in operation */ 3370 res = tee_obj_get(utc, cs->key1, &ko); 3371 if (res != TEE_SUCCESS) 3372 goto out; 3373 3374 res = tee_obj_get(utc, uref_to_vaddr(derived_key), &so); 3375 if (res != TEE_SUCCESS) 3376 goto out; 3377 3378 /* Find information needed about the object to initialize */ 3379 sk = so->attr; 3380 3381 /* Find description of object */ 3382 type_props = tee_svc_find_type_props(so->info.objectType); 3383 if (!type_props) { 3384 res = TEE_ERROR_NOT_SUPPORTED; 3385 goto out; 3386 } 3387 3388 if (cs->algo == TEE_ALG_DH_DERIVE_SHARED_SECRET) { 3389 struct bignum *pub = NULL; 3390 struct bignum *ss = NULL; 3391 size_t bin_size = 0; 3392 3393 if (param_count != 1 || 3394 params[0].attributeID != TEE_ATTR_DH_PUBLIC_VALUE) { 3395 res = TEE_ERROR_BAD_PARAMETERS; 3396 goto out; 3397 } 3398 3399 bin_size = params[0].content.ref.length; 3400 3401 if (MUL_OVERFLOW(bin_size, 8, &alloc_size)) { 3402 res = TEE_ERROR_OVERFLOW; 3403 goto out; 3404 } 3405 3406 pub = crypto_bignum_allocate(alloc_size); 3407 ss = crypto_bignum_allocate(alloc_size); 3408 if (pub && ss) { 3409 crypto_bignum_bin2bn(params[0].content.ref.buffer, 3410 bin_size, pub); 3411 res = crypto_acipher_dh_shared_secret(ko->attr, 3412 pub, ss); 3413 if (res == TEE_SUCCESS) { 3414 sk->key_size = crypto_bignum_num_bytes(ss); 3415 crypto_bignum_bn2bin(ss, (uint8_t *)(sk + 1)); 3416 so->info.handleFlags |= 3417 TEE_HANDLE_FLAG_INITIALIZED; 3418 set_attribute(so, type_props, 3419 TEE_ATTR_SECRET_VALUE); 3420 } 3421 } else { 3422 res = TEE_ERROR_OUT_OF_MEMORY; 3423 } 3424 crypto_bignum_free(pub); 3425 crypto_bignum_free(ss); 3426 } else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_ECDH) { 3427 struct ecc_public_key key_public; 3428 uint8_t *pt_secret; 3429 unsigned long pt_secret_len; 3430 uint32_t key_type = TEE_TYPE_ECDH_PUBLIC_KEY; 3431 3432 if (param_count != 2 || 3433 params[0].attributeID != TEE_ATTR_ECC_PUBLIC_VALUE_X || 3434 params[1].attributeID != TEE_ATTR_ECC_PUBLIC_VALUE_Y) { 3435 res = TEE_ERROR_BAD_PARAMETERS; 3436 goto out; 3437 } 3438 3439 switch (cs->algo) { 3440 case TEE_ALG_ECDH_P192: 3441 alloc_size = 192; 3442 break; 3443 case TEE_ALG_ECDH_P224: 3444 alloc_size = 224; 3445 break; 3446 case TEE_ALG_ECDH_P256: 3447 alloc_size = 256; 3448 break; 3449 case TEE_ALG_ECDH_P384: 3450 alloc_size = 384; 3451 break; 3452 case TEE_ALG_ECDH_P521: 3453 alloc_size = 521; 3454 break; 3455 default: 3456 res = TEE_ERROR_NOT_IMPLEMENTED; 3457 goto out; 3458 } 3459 3460 /* Create the public key */ 3461 res = crypto_acipher_alloc_ecc_public_key(&key_public, key_type, 3462 alloc_size); 3463 if (res != TEE_SUCCESS) 3464 goto out; 3465 key_public.curve = ((struct ecc_keypair *)ko->attr)->curve; 3466 crypto_bignum_bin2bn(params[0].content.ref.buffer, 3467 params[0].content.ref.length, 3468 key_public.x); 3469 crypto_bignum_bin2bn(params[1].content.ref.buffer, 3470 params[1].content.ref.length, 3471 key_public.y); 3472 3473 pt_secret = (uint8_t *)(sk + 1); 3474 pt_secret_len = sk->alloc_size; 3475 res = crypto_acipher_ecc_shared_secret(ko->attr, &key_public, 3476 pt_secret, 3477 &pt_secret_len); 3478 3479 if (res == TEE_SUCCESS) { 3480 sk->key_size = pt_secret_len; 3481 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3482 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3483 } 3484 3485 /* free the public key */ 3486 crypto_acipher_free_ecc_public_key(&key_public); 3487 } 3488 #if defined(CFG_CRYPTO_HKDF) 3489 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_HKDF) { 3490 void *salt, *info; 3491 size_t salt_len, info_len, okm_len; 3492 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 3493 struct tee_cryp_obj_secret *ik = ko->attr; 3494 const uint8_t *ikm = (const uint8_t *)(ik + 1); 3495 3496 res = get_hkdf_params(params, param_count, &salt, &salt_len, 3497 &info, &info_len, &okm_len); 3498 if (res != TEE_SUCCESS) 3499 goto out; 3500 3501 /* Requested size must fit into the output object's buffer */ 3502 if (okm_len > ik->alloc_size) { 3503 res = TEE_ERROR_BAD_PARAMETERS; 3504 goto out; 3505 } 3506 3507 res = tee_cryp_hkdf(hash_id, ikm, ik->key_size, salt, salt_len, 3508 info, info_len, (uint8_t *)(sk + 1), 3509 okm_len); 3510 if (res == TEE_SUCCESS) { 3511 sk->key_size = okm_len; 3512 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3513 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3514 } 3515 } 3516 #endif 3517 #if defined(CFG_CRYPTO_CONCAT_KDF) 3518 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_CONCAT_KDF) { 3519 void *info; 3520 size_t info_len, derived_key_len; 3521 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 3522 struct tee_cryp_obj_secret *ss = ko->attr; 3523 const uint8_t *shared_secret = (const uint8_t *)(ss + 1); 3524 3525 res = get_concat_kdf_params(params, param_count, &info, 3526 &info_len, &derived_key_len); 3527 if (res != TEE_SUCCESS) 3528 goto out; 3529 3530 /* Requested size must fit into the output object's buffer */ 3531 if (derived_key_len > ss->alloc_size) { 3532 res = TEE_ERROR_BAD_PARAMETERS; 3533 goto out; 3534 } 3535 3536 res = tee_cryp_concat_kdf(hash_id, shared_secret, ss->key_size, 3537 info, info_len, (uint8_t *)(sk + 1), 3538 derived_key_len); 3539 if (res == TEE_SUCCESS) { 3540 sk->key_size = derived_key_len; 3541 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3542 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3543 } 3544 } 3545 #endif 3546 #if defined(CFG_CRYPTO_PBKDF2) 3547 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_PBKDF2) { 3548 void *salt; 3549 size_t salt_len, iteration_count, derived_key_len; 3550 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 3551 struct tee_cryp_obj_secret *ss = ko->attr; 3552 const uint8_t *password = (const uint8_t *)(ss + 1); 3553 3554 res = get_pbkdf2_params(params, param_count, &salt, &salt_len, 3555 &derived_key_len, &iteration_count); 3556 if (res != TEE_SUCCESS) 3557 goto out; 3558 3559 /* Requested size must fit into the output object's buffer */ 3560 if (derived_key_len > ss->alloc_size) { 3561 res = TEE_ERROR_BAD_PARAMETERS; 3562 goto out; 3563 } 3564 3565 res = tee_cryp_pbkdf2(hash_id, password, ss->key_size, salt, 3566 salt_len, iteration_count, 3567 (uint8_t *)(sk + 1), derived_key_len); 3568 if (res == TEE_SUCCESS) { 3569 sk->key_size = derived_key_len; 3570 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3571 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3572 } 3573 } 3574 #endif 3575 #if defined(CFG_CRYPTO_SM2_KEP) 3576 else if (cs->algo == TEE_ALG_SM2_KEP) { 3577 struct ecc_public_key peer_eph_key = { }; 3578 struct ecc_public_key peer_key = { }; 3579 struct sm2_kep_parms kep_parms = { 3580 .out = (uint8_t *)(sk + 1), 3581 .out_len = so->info.maxKeySize, 3582 }; 3583 struct tee_obj *ko2 = NULL; 3584 3585 res = tee_obj_get(utc, cs->key2, &ko2); 3586 if (res != TEE_SUCCESS) 3587 goto out; 3588 3589 res = get_sm2_kep_params(params, param_count, &peer_key, 3590 &peer_eph_key, &kep_parms); 3591 if (res != TEE_SUCCESS) 3592 goto out; 3593 3594 /* 3595 * key1 is our private keypair, key2 is our ephemeral public key 3596 */ 3597 res = crypto_acipher_sm2_kep_derive(ko->attr, /* key1 */ 3598 ko2->attr, /* key2 */ 3599 &peer_key, &peer_eph_key, 3600 &kep_parms); 3601 3602 if (res == TEE_SUCCESS) { 3603 sk->key_size = kep_parms.out_len; 3604 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3605 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3606 } 3607 crypto_acipher_free_ecc_public_key(&peer_key); 3608 crypto_acipher_free_ecc_public_key(&peer_eph_key); 3609 } 3610 #endif 3611 #if defined(CFG_CRYPTO_X25519) 3612 else if (cs->algo == TEE_ALG_X25519) { 3613 uint8_t *x25519_pub_key = NULL; 3614 uint8_t *pt_secret = NULL; 3615 unsigned long pt_secret_len = 0; 3616 3617 if (param_count != 1 || 3618 params[0].attributeID != TEE_ATTR_X25519_PUBLIC_VALUE) { 3619 res = TEE_ERROR_BAD_PARAMETERS; 3620 goto out; 3621 } 3622 3623 /* X25519 public key size is 32 bytes */ 3624 if (params[0].content.ref.length != KEY_SIZE_BYTES_25519) { 3625 res = TEE_ERROR_BAD_PARAMETERS; 3626 goto out; 3627 } 3628 3629 /* Set the public key */ 3630 x25519_pub_key = params[0].content.ref.buffer; 3631 3632 pt_secret = (uint8_t *)(sk + 1); 3633 pt_secret_len = sk->alloc_size; 3634 res = crypto_acipher_x25519_shared_secret(ko->attr, 3635 x25519_pub_key, 3636 pt_secret, 3637 &pt_secret_len); 3638 3639 if (res == TEE_SUCCESS) { 3640 sk->key_size = pt_secret_len; 3641 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 3642 set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); 3643 } 3644 } 3645 #endif 3646 else 3647 res = TEE_ERROR_NOT_SUPPORTED; 3648 3649 out: 3650 free_wipe(params); 3651 return res; 3652 } 3653 3654 TEE_Result syscall_cryp_random_number_generate(void *buf, size_t blen) 3655 { 3656 struct ts_session *sess = ts_get_current_session(); 3657 TEE_Result res = TEE_SUCCESS; 3658 3659 buf = memtag_strip_tag(buf); 3660 3661 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3662 TEE_MEMORY_ACCESS_WRITE, 3663 (uaddr_t)buf, blen); 3664 if (res != TEE_SUCCESS) 3665 return res; 3666 3667 res = crypto_rng_read(buf, blen); 3668 if (res != TEE_SUCCESS) 3669 return res; 3670 3671 return res; 3672 } 3673 3674 TEE_Result syscall_authenc_init(unsigned long state, const void *nonce, 3675 size_t nonce_len, size_t tag_len, 3676 size_t aad_len, size_t payload_len) 3677 { 3678 struct ts_session *sess = ts_get_current_session(); 3679 struct tee_cryp_obj_secret *key = NULL; 3680 struct tee_cryp_state *cs = NULL; 3681 TEE_Result res = TEE_SUCCESS; 3682 struct tee_obj *o = NULL; 3683 3684 nonce = memtag_strip_tag_const(nonce); 3685 3686 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3687 TEE_MEMORY_ACCESS_READ | 3688 TEE_MEMORY_ACCESS_ANY_OWNER, 3689 (uaddr_t)nonce, nonce_len); 3690 if (res != TEE_SUCCESS) 3691 return res; 3692 3693 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3694 if (res != TEE_SUCCESS) 3695 return res; 3696 3697 res = tee_obj_get(to_user_ta_ctx(sess->ctx), cs->key1, &o); 3698 if (res != TEE_SUCCESS) 3699 return res; 3700 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 3701 return TEE_ERROR_BAD_PARAMETERS; 3702 3703 key = o->attr; 3704 res = crypto_authenc_init(cs->ctx, cs->mode, (uint8_t *)(key + 1), 3705 key->key_size, nonce, nonce_len, tag_len, 3706 aad_len, payload_len); 3707 if (res != TEE_SUCCESS) 3708 return res; 3709 3710 cs->ctx_finalize = crypto_authenc_final; 3711 cs->state = CRYP_STATE_INITIALIZED; 3712 3713 return TEE_SUCCESS; 3714 } 3715 3716 TEE_Result syscall_authenc_update_aad(unsigned long state, 3717 const void *aad_data, size_t aad_data_len) 3718 { 3719 struct ts_session *sess = ts_get_current_session(); 3720 TEE_Result res = TEE_SUCCESS; 3721 struct tee_cryp_state *cs = NULL; 3722 3723 aad_data = memtag_strip_tag_const(aad_data); 3724 3725 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3726 TEE_MEMORY_ACCESS_READ | 3727 TEE_MEMORY_ACCESS_ANY_OWNER, 3728 (uaddr_t)aad_data, aad_data_len); 3729 if (res != TEE_SUCCESS) 3730 return res; 3731 3732 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3733 if (res != TEE_SUCCESS) 3734 return res; 3735 3736 if (cs->state != CRYP_STATE_INITIALIZED) 3737 return TEE_ERROR_BAD_STATE; 3738 3739 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) 3740 return TEE_ERROR_BAD_STATE; 3741 3742 res = crypto_authenc_update_aad(cs->ctx, cs->mode, aad_data, 3743 aad_data_len); 3744 if (res != TEE_SUCCESS) 3745 return res; 3746 3747 return TEE_SUCCESS; 3748 } 3749 3750 TEE_Result syscall_authenc_update_payload(unsigned long state, 3751 const void *src_data, 3752 size_t src_len, void *dst_data, 3753 uint64_t *dst_len) 3754 { 3755 struct ts_session *sess = ts_get_current_session(); 3756 struct tee_cryp_state *cs = NULL; 3757 TEE_Result res = TEE_SUCCESS; 3758 size_t dlen = 0; 3759 3760 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3761 if (res != TEE_SUCCESS) 3762 return res; 3763 3764 if (cs->state != CRYP_STATE_INITIALIZED) 3765 return TEE_ERROR_BAD_STATE; 3766 3767 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) 3768 return TEE_ERROR_BAD_STATE; 3769 3770 src_data = memtag_strip_tag_const(src_data); 3771 dst_data = memtag_strip_tag(dst_data); 3772 3773 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3774 TEE_MEMORY_ACCESS_READ | 3775 TEE_MEMORY_ACCESS_ANY_OWNER, 3776 (uaddr_t)src_data, src_len); 3777 if (res != TEE_SUCCESS) 3778 return res; 3779 3780 res = get_user_u64_as_size_t(&dlen, dst_len); 3781 if (res != TEE_SUCCESS) 3782 return res; 3783 3784 res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, 3785 TEE_MEMORY_ACCESS_READ | 3786 TEE_MEMORY_ACCESS_WRITE | 3787 TEE_MEMORY_ACCESS_ANY_OWNER, 3788 (uaddr_t)dst_data, dlen); 3789 if (res != TEE_SUCCESS) 3790 return res; 3791 3792 if (dlen < src_len) { 3793 res = TEE_ERROR_SHORT_BUFFER; 3794 goto out; 3795 } 3796 3797 res = crypto_authenc_update_payload(cs->ctx, cs->mode, src_data, 3798 src_len, dst_data, &dlen); 3799 out: 3800 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 3801 TEE_Result res2 = put_user_u64(dst_len, dlen); 3802 3803 if (res2 != TEE_SUCCESS) 3804 res = res2; 3805 } 3806 3807 return res; 3808 } 3809 3810 TEE_Result syscall_authenc_enc_final(unsigned long state, const void *src_data, 3811 size_t src_len, void *dst_data, 3812 uint64_t *dst_len, void *tag, 3813 uint64_t *tag_len) 3814 { 3815 struct ts_session *sess = ts_get_current_session(); 3816 struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; 3817 struct tee_cryp_state *cs = NULL; 3818 TEE_Result res = TEE_SUCCESS; 3819 size_t dlen = 0; 3820 size_t tlen = 0; 3821 3822 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3823 if (res != TEE_SUCCESS) 3824 return res; 3825 3826 if (cs->state != CRYP_STATE_INITIALIZED) 3827 return TEE_ERROR_BAD_STATE; 3828 3829 if (cs->mode != TEE_MODE_ENCRYPT) 3830 return TEE_ERROR_BAD_PARAMETERS; 3831 3832 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) 3833 return TEE_ERROR_BAD_STATE; 3834 3835 src_data = memtag_strip_tag_const(src_data); 3836 dst_data = memtag_strip_tag(dst_data); 3837 tag = memtag_strip_tag(tag); 3838 3839 res = vm_check_access_rights(uctx, 3840 TEE_MEMORY_ACCESS_READ | 3841 TEE_MEMORY_ACCESS_ANY_OWNER, 3842 (uaddr_t)src_data, src_len); 3843 if (res != TEE_SUCCESS) 3844 return res; 3845 3846 if (!dst_len) { 3847 dlen = 0; 3848 } else { 3849 res = get_user_u64_as_size_t(&dlen, dst_len); 3850 if (res != TEE_SUCCESS) 3851 return res; 3852 3853 res = vm_check_access_rights(uctx, 3854 TEE_MEMORY_ACCESS_READ | 3855 TEE_MEMORY_ACCESS_WRITE | 3856 TEE_MEMORY_ACCESS_ANY_OWNER, 3857 (uaddr_t)dst_data, dlen); 3858 if (res != TEE_SUCCESS) 3859 return res; 3860 } 3861 3862 if (dlen < src_len) { 3863 res = TEE_ERROR_SHORT_BUFFER; 3864 goto out; 3865 } 3866 3867 res = get_user_u64_as_size_t(&tlen, tag_len); 3868 if (res != TEE_SUCCESS) 3869 return res; 3870 3871 res = vm_check_access_rights(uctx, 3872 TEE_MEMORY_ACCESS_READ | 3873 TEE_MEMORY_ACCESS_WRITE | 3874 TEE_MEMORY_ACCESS_ANY_OWNER, 3875 (uaddr_t)tag, tlen); 3876 if (res != TEE_SUCCESS) 3877 return res; 3878 3879 res = crypto_authenc_enc_final(cs->ctx, src_data, src_len, dst_data, 3880 &dlen, tag, &tlen); 3881 3882 out: 3883 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 3884 TEE_Result res2 = TEE_SUCCESS; 3885 3886 if (dst_len != NULL) { 3887 res2 = put_user_u64(dst_len, dlen); 3888 if (res2 != TEE_SUCCESS) 3889 return res2; 3890 } 3891 3892 res2 = put_user_u64(tag_len, tlen); 3893 if (res2 != TEE_SUCCESS) 3894 return res2; 3895 } 3896 3897 return res; 3898 } 3899 3900 TEE_Result syscall_authenc_dec_final(unsigned long state, 3901 const void *src_data, size_t src_len, void *dst_data, 3902 uint64_t *dst_len, const void *tag, size_t tag_len) 3903 { 3904 struct ts_session *sess = ts_get_current_session(); 3905 struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; 3906 struct tee_cryp_state *cs = NULL; 3907 TEE_Result res = TEE_SUCCESS; 3908 size_t dlen = 0; 3909 3910 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 3911 if (res != TEE_SUCCESS) 3912 return res; 3913 3914 if (cs->state != CRYP_STATE_INITIALIZED) 3915 return TEE_ERROR_BAD_STATE; 3916 3917 if (cs->mode != TEE_MODE_DECRYPT) 3918 return TEE_ERROR_BAD_PARAMETERS; 3919 3920 if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) 3921 return TEE_ERROR_BAD_STATE; 3922 3923 src_data = memtag_strip_tag_const(src_data); 3924 dst_data = memtag_strip_tag(dst_data); 3925 tag = memtag_strip_tag_const(tag); 3926 3927 res = vm_check_access_rights(uctx, 3928 TEE_MEMORY_ACCESS_READ | 3929 TEE_MEMORY_ACCESS_ANY_OWNER, 3930 (uaddr_t)src_data, src_len); 3931 if (res != TEE_SUCCESS) 3932 return res; 3933 3934 if (!dst_len) { 3935 dlen = 0; 3936 } else { 3937 res = get_user_u64_as_size_t(&dlen, dst_len); 3938 if (res != TEE_SUCCESS) 3939 return res; 3940 3941 res = vm_check_access_rights(uctx, 3942 TEE_MEMORY_ACCESS_READ | 3943 TEE_MEMORY_ACCESS_WRITE | 3944 TEE_MEMORY_ACCESS_ANY_OWNER, 3945 (uaddr_t)dst_data, dlen); 3946 if (res != TEE_SUCCESS) 3947 return res; 3948 } 3949 3950 if (dlen < src_len) { 3951 res = TEE_ERROR_SHORT_BUFFER; 3952 goto out; 3953 } 3954 3955 res = vm_check_access_rights(uctx, TEE_MEMORY_ACCESS_READ, 3956 (uaddr_t)tag, tag_len); 3957 if (res != TEE_SUCCESS) 3958 return res; 3959 3960 res = crypto_authenc_dec_final(cs->ctx, src_data, src_len, dst_data, 3961 &dlen, tag, tag_len); 3962 3963 out: 3964 if ((res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) && 3965 dst_len != NULL) { 3966 TEE_Result res2 = put_user_u64(dst_len, dlen); 3967 3968 if (res2 != TEE_SUCCESS) 3969 return res2; 3970 } 3971 3972 return res; 3973 } 3974 3975 static int pkcs1_get_salt_len(const TEE_Attribute *params, uint32_t num_params, 3976 size_t default_len) 3977 { 3978 size_t n; 3979 3980 assert(default_len < INT_MAX); 3981 3982 for (n = 0; n < num_params; n++) { 3983 if (params[n].attributeID == TEE_ATTR_RSA_PSS_SALT_LENGTH) { 3984 if (params[n].content.value.a < INT_MAX) 3985 return params[n].content.value.a; 3986 break; 3987 } 3988 } 3989 /* 3990 * If salt length isn't provided use the default value which is 3991 * the length of the digest. 3992 */ 3993 return default_len; 3994 } 3995 3996 TEE_Result syscall_asymm_operate(unsigned long state, 3997 const struct utee_attribute *usr_params, 3998 size_t num_params, const void *src_data, size_t src_len, 3999 void *dst_data, uint64_t *dst_len) 4000 { 4001 struct ts_session *sess = ts_get_current_session(); 4002 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 4003 TEE_Result res = TEE_SUCCESS; 4004 struct tee_cryp_state *cs = NULL; 4005 size_t dlen = 0; 4006 struct tee_obj *o = NULL; 4007 void *label = NULL; 4008 size_t label_len = 0; 4009 size_t n = 0; 4010 int salt_len = 0; 4011 TEE_Attribute *params = NULL; 4012 size_t alloc_size = 0; 4013 4014 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 4015 if (res != TEE_SUCCESS) 4016 return res; 4017 4018 src_data = memtag_strip_tag_const(src_data); 4019 dst_data = memtag_strip_tag(dst_data); 4020 4021 res = vm_check_access_rights(&utc->uctx, 4022 TEE_MEMORY_ACCESS_READ | 4023 TEE_MEMORY_ACCESS_ANY_OWNER, 4024 (uaddr_t)src_data, src_len); 4025 if (res != TEE_SUCCESS) 4026 return res; 4027 4028 res = get_user_u64_as_size_t(&dlen, dst_len); 4029 if (res != TEE_SUCCESS) 4030 return res; 4031 4032 res = vm_check_access_rights(&utc->uctx, 4033 TEE_MEMORY_ACCESS_READ | 4034 TEE_MEMORY_ACCESS_WRITE | 4035 TEE_MEMORY_ACCESS_ANY_OWNER, 4036 (uaddr_t)dst_data, dlen); 4037 if (res != TEE_SUCCESS) 4038 return res; 4039 4040 if (MUL_OVERFLOW(sizeof(TEE_Attribute), num_params, &alloc_size)) 4041 return TEE_ERROR_OVERFLOW; 4042 4043 params = malloc(alloc_size); 4044 if (!params) 4045 return TEE_ERROR_OUT_OF_MEMORY; 4046 res = copy_in_attrs(utc, usr_params, num_params, params); 4047 if (res != TEE_SUCCESS) 4048 goto out; 4049 4050 res = tee_obj_get(utc, cs->key1, &o); 4051 if (res != TEE_SUCCESS) 4052 goto out; 4053 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 4054 res = TEE_ERROR_GENERIC; 4055 goto out; 4056 } 4057 4058 switch (cs->algo) { 4059 case TEE_ALG_RSA_NOPAD: 4060 if (cs->mode == TEE_MODE_ENCRYPT) { 4061 res = crypto_acipher_rsanopad_encrypt(o->attr, src_data, 4062 src_len, dst_data, 4063 &dlen); 4064 } else if (cs->mode == TEE_MODE_DECRYPT) { 4065 res = crypto_acipher_rsanopad_decrypt(o->attr, src_data, 4066 src_len, dst_data, 4067 &dlen); 4068 } else { 4069 /* 4070 * We will panic because "the mode is not compatible 4071 * with the function" 4072 */ 4073 res = TEE_ERROR_GENERIC; 4074 } 4075 break; 4076 4077 case TEE_ALG_SM2_PKE: 4078 if (cs->mode == TEE_MODE_ENCRYPT) { 4079 res = crypto_acipher_sm2_pke_encrypt(o->attr, src_data, 4080 src_len, dst_data, 4081 &dlen); 4082 } else if (cs->mode == TEE_MODE_DECRYPT) { 4083 res = crypto_acipher_sm2_pke_decrypt(o->attr, src_data, 4084 src_len, dst_data, 4085 &dlen); 4086 } else { 4087 res = TEE_ERROR_GENERIC; 4088 } 4089 break; 4090 4091 case TEE_ALG_RSAES_PKCS1_V1_5: 4092 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA1: 4093 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA224: 4094 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA256: 4095 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA384: 4096 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA512: 4097 for (n = 0; n < num_params; n++) { 4098 if (params[n].attributeID == TEE_ATTR_RSA_OAEP_LABEL) { 4099 label = params[n].content.ref.buffer; 4100 label_len = params[n].content.ref.length; 4101 break; 4102 } 4103 } 4104 4105 if (cs->mode == TEE_MODE_ENCRYPT) { 4106 res = crypto_acipher_rsaes_encrypt(cs->algo, o->attr, 4107 label, label_len, 4108 src_data, src_len, 4109 dst_data, &dlen); 4110 } else if (cs->mode == TEE_MODE_DECRYPT) { 4111 res = crypto_acipher_rsaes_decrypt( 4112 cs->algo, o->attr, label, label_len, 4113 src_data, src_len, dst_data, &dlen); 4114 } else { 4115 res = TEE_ERROR_BAD_PARAMETERS; 4116 } 4117 break; 4118 4119 #if defined(CFG_CRYPTO_RSASSA_NA1) 4120 case TEE_ALG_RSASSA_PKCS1_V1_5: 4121 #endif 4122 case TEE_ALG_RSASSA_PKCS1_V1_5_MD5: 4123 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA1: 4124 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA224: 4125 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA256: 4126 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA384: 4127 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA512: 4128 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA1: 4129 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA224: 4130 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA256: 4131 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA384: 4132 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA512: 4133 if (cs->mode != TEE_MODE_SIGN) { 4134 res = TEE_ERROR_BAD_PARAMETERS; 4135 break; 4136 } 4137 salt_len = pkcs1_get_salt_len(params, num_params, src_len); 4138 res = crypto_acipher_rsassa_sign(cs->algo, o->attr, salt_len, 4139 src_data, src_len, dst_data, 4140 &dlen); 4141 break; 4142 4143 case TEE_ALG_DSA_SHA1: 4144 case TEE_ALG_DSA_SHA224: 4145 case TEE_ALG_DSA_SHA256: 4146 res = crypto_acipher_dsa_sign(cs->algo, o->attr, src_data, 4147 src_len, dst_data, &dlen); 4148 break; 4149 4150 case TEE_ALG_ED25519: 4151 res = tee_svc_obj_ed25519_sign(o->attr, src_data, src_len, 4152 dst_data, &dlen, params, 4153 num_params); 4154 break; 4155 4156 case TEE_ALG_ECDSA_P192: 4157 case TEE_ALG_ECDSA_P224: 4158 case TEE_ALG_ECDSA_P256: 4159 case TEE_ALG_ECDSA_P384: 4160 case TEE_ALG_ECDSA_P521: 4161 case TEE_ALG_SM2_DSA_SM3: 4162 res = crypto_acipher_ecc_sign(cs->algo, o->attr, src_data, 4163 src_len, dst_data, &dlen); 4164 break; 4165 default: 4166 res = TEE_ERROR_BAD_PARAMETERS; 4167 break; 4168 } 4169 4170 out: 4171 free_wipe(params); 4172 4173 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 4174 TEE_Result res2 = put_user_u64(dst_len, dlen); 4175 4176 if (res2 != TEE_SUCCESS) 4177 return res2; 4178 } 4179 4180 return res; 4181 } 4182 4183 TEE_Result syscall_asymm_verify(unsigned long state, 4184 const struct utee_attribute *usr_params, 4185 size_t num_params, const void *data, size_t data_len, 4186 const void *sig, size_t sig_len) 4187 { 4188 struct ts_session *sess = ts_get_current_session(); 4189 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 4190 struct tee_cryp_state *cs = NULL; 4191 TEE_Result res = TEE_SUCCESS; 4192 TEE_Attribute *params = NULL; 4193 struct tee_obj *o = NULL; 4194 size_t hash_size = 0; 4195 uint32_t hash_algo = 0; 4196 int salt_len = 0; 4197 size_t alloc_size = 0; 4198 4199 res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); 4200 if (res != TEE_SUCCESS) 4201 return res; 4202 4203 if (cs->mode != TEE_MODE_VERIFY) 4204 return TEE_ERROR_BAD_PARAMETERS; 4205 4206 data = memtag_strip_tag_const(data); 4207 sig = memtag_strip_tag_const(sig); 4208 4209 res = vm_check_access_rights(&utc->uctx, 4210 TEE_MEMORY_ACCESS_READ | 4211 TEE_MEMORY_ACCESS_ANY_OWNER, 4212 (uaddr_t)data, data_len); 4213 if (res != TEE_SUCCESS) 4214 return res; 4215 4216 res = vm_check_access_rights(&utc->uctx, 4217 TEE_MEMORY_ACCESS_READ | 4218 TEE_MEMORY_ACCESS_ANY_OWNER, 4219 (uaddr_t)sig, sig_len); 4220 if (res != TEE_SUCCESS) 4221 return res; 4222 4223 if (MUL_OVERFLOW(sizeof(TEE_Attribute), num_params, &alloc_size)) 4224 return TEE_ERROR_OVERFLOW; 4225 4226 params = malloc(alloc_size); 4227 if (!params) 4228 return TEE_ERROR_OUT_OF_MEMORY; 4229 res = copy_in_attrs(utc, usr_params, num_params, params); 4230 if (res != TEE_SUCCESS) 4231 goto out; 4232 4233 res = tee_obj_get(utc, cs->key1, &o); 4234 if (res != TEE_SUCCESS) 4235 goto out; 4236 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 4237 res = TEE_ERROR_BAD_PARAMETERS; 4238 goto out; 4239 } 4240 4241 switch (TEE_ALG_GET_MAIN_ALG(cs->algo)) { 4242 case TEE_MAIN_ALGO_RSA: 4243 if (cs->algo != TEE_ALG_RSASSA_PKCS1_V1_5) { 4244 hash_algo = TEE_DIGEST_HASH_TO_ALGO(cs->algo); 4245 res = tee_alg_get_digest_size(hash_algo, &hash_size); 4246 if (res != TEE_SUCCESS) 4247 break; 4248 if (data_len != hash_size) { 4249 res = TEE_ERROR_BAD_PARAMETERS; 4250 break; 4251 } 4252 salt_len = pkcs1_get_salt_len(params, num_params, 4253 hash_size); 4254 } 4255 res = crypto_acipher_rsassa_verify(cs->algo, o->attr, salt_len, 4256 data, data_len, sig, 4257 sig_len); 4258 break; 4259 4260 case TEE_MAIN_ALGO_DSA: 4261 hash_algo = TEE_DIGEST_HASH_TO_ALGO(cs->algo); 4262 res = tee_alg_get_digest_size(hash_algo, &hash_size); 4263 if (res != TEE_SUCCESS) 4264 break; 4265 4266 if (data_len != hash_size) { 4267 struct dsa_public_key *key = o->attr; 4268 4269 /* 4270 * Depending on the DSA algorithm (NIST), the 4271 * digital signature output size may be truncated 4272 * to the size of a key pair (Q prime size). Q 4273 * prime size must be less or equal than the hash 4274 * output length of the hash algorithm involved. 4275 * 4276 * We're checking here in order to be able to 4277 * return this particular error code, which will 4278 * cause TEE_AsymmetricVerifyDigest() to panic as 4279 * required by GP. crypto_acipher_dsa_verify() is 4280 * implemented in the glue layer of the crypto 4281 * library and it might be a bit harder to catch 4282 * this particular case there or lead to duplicated 4283 * code in different crypto glue layers. 4284 * 4285 * The GP spec says that we SHOULD panic if 4286 * data_len != hash_size, but that would break a 4287 * few of the DSA tests in xtest where the 4288 * hash_size is larger than possible data_len. So 4289 * the compromise is in case data_len != hash_size 4290 * check that it's not smaller than what makes 4291 * sense. 4292 */ 4293 if (data_len != crypto_bignum_num_bytes(key->q)) { 4294 res = TEE_ERROR_BAD_PARAMETERS; 4295 break; 4296 } 4297 } 4298 res = crypto_acipher_dsa_verify(cs->algo, o->attr, data, 4299 data_len, sig, sig_len); 4300 break; 4301 4302 case TEE_MAIN_ALGO_ED25519: 4303 res = tee_svc_obj_ed25519_verify(o->attr, data, 4304 data_len, sig, sig_len, 4305 params, num_params); 4306 break; 4307 4308 case TEE_MAIN_ALGO_ECDSA: 4309 case TEE_MAIN_ALGO_SM2_DSA_SM3: 4310 res = crypto_acipher_ecc_verify(cs->algo, o->attr, data, 4311 data_len, sig, sig_len); 4312 break; 4313 4314 default: 4315 res = TEE_ERROR_NOT_SUPPORTED; 4316 } 4317 4318 out: 4319 free_wipe(params); 4320 return res; 4321 } 4322