1 /* 2 * Copyright (c) 2014, STMicroelectronics International N.V. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #include <tee_api_types.h> 28 #include <kernel/tee_ta_manager.h> 29 #include <utee_defines.h> 30 #include <mm/tee_mmu.h> 31 #include <tee/tee_svc.h> 32 #include <tee/tee_svc_cryp.h> 33 #include <tee/tee_cryp_utl.h> 34 #include <sys/queue.h> 35 #include <tee/tee_obj.h> 36 #include <tee/tee_cryp_provider.h> 37 #include <trace.h> 38 #include <string_ext.h> 39 #if defined(CFG_CRYPTO_HKDF) || defined(CFG_CRYPTO_CONCAT_KDF) || \ 40 defined(CFG_CRYPTO_PBKDF2) 41 #include <tee_api_defines_extensions.h> 42 #endif 43 #if defined(CFG_CRYPTO_HKDF) 44 #include <tee/tee_cryp_hkdf.h> 45 #endif 46 #if defined(CFG_CRYPTO_CONCAT_KDF) 47 #include <tee/tee_cryp_concat_kdf.h> 48 #endif 49 #if defined(CFG_CRYPTO_PBKDF2) 50 #include <tee/tee_cryp_pbkdf2.h> 51 #endif 52 53 /* Set an attribute on an object */ 54 #define SET_ATTRIBUTE(_object, _props, _attr) \ 55 ((_object)->have_attrs |= \ 56 (1 << (tee_svc_cryp_obj_find_type_attr_idx((_attr), (_props))))) 57 58 /* Get an attribute on an object */ 59 #define GET_ATTRIBUTE(_object, _props, _attr) \ 60 ((_object)->have_attrs & \ 61 (1 << (tee_svc_cryp_obj_find_type_attr_idx((_attr), (_props))))) 62 63 #define TEE_USAGE_DEFAULT 0xffffffff 64 65 typedef void (*tee_cryp_ctx_finalize_func_t) (void *ctx, uint32_t algo); 66 struct tee_cryp_state { 67 TAILQ_ENTRY(tee_cryp_state) link; 68 uint32_t algo; 69 uint32_t mode; 70 uint32_t key1; 71 uint32_t key2; 72 size_t ctx_size; 73 void *ctx; 74 tee_cryp_ctx_finalize_func_t ctx_finalize; 75 }; 76 77 struct tee_cryp_obj_secret { 78 uint32_t key_size; 79 80 /* 81 * Pseudo code visualize layout of structure 82 * Next follows data, such as: 83 * uint8_t data[key_size] 84 * key_size must never exceed 85 * (obj->data_size - sizeof(struct tee_cryp_obj_secret)). 86 */ 87 }; 88 89 #define TEE_TYPE_ATTR_OPTIONAL 0x0 90 #define TEE_TYPE_ATTR_REQUIRED 0x1 91 #define TEE_TYPE_ATTR_OPTIONAL_GROUP 0x2 92 #define TEE_TYPE_ATTR_SIZE_INDICATOR 0x4 93 #define TEE_TYPE_ATTR_GEN_KEY_OPT 0x8 94 #define TEE_TYPE_ATTR_GEN_KEY_REQ 0x10 95 96 #define TEE_TYPE_CONV_FUNC_NONE 0 97 /* Handle storing of generic secret keys of varying lengths */ 98 #define TEE_TYPE_CONV_FUNC_SECRET 1 99 /* Convert to/from big-endian byte array and provider-specific bignum */ 100 #define TEE_TYPE_CONV_FUNC_BIGNUM 2 101 /* Convert to/from value attribute depending on direction */ 102 #define TEE_TYPE_CONV_FUNC_VALUE 4 103 104 struct tee_cryp_obj_type_attrs { 105 uint32_t attr_id; 106 uint16_t flags; 107 uint16_t conv_func; 108 uint16_t raw_offs; 109 uint16_t raw_size; 110 }; 111 112 #define RAW_DATA(_x, _y) \ 113 .raw_offs = offsetof(_x, _y), .raw_size = TEE_MEMBER_SIZE(_x, _y) 114 115 static const struct tee_cryp_obj_type_attrs 116 tee_cryp_obj_secret_value_attrs[] = { 117 { 118 .attr_id = TEE_ATTR_SECRET_VALUE, 119 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 120 .conv_func = TEE_TYPE_CONV_FUNC_SECRET, 121 .raw_offs = 0, 122 .raw_size = 0 123 }, 124 }; 125 126 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_rsa_pub_key_attrs[] = { 127 { 128 .attr_id = TEE_ATTR_RSA_MODULUS, 129 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 130 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 131 RAW_DATA(struct rsa_public_key, n) 132 }, 133 134 { 135 .attr_id = TEE_ATTR_RSA_PUBLIC_EXPONENT, 136 .flags = TEE_TYPE_ATTR_REQUIRED, 137 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 138 RAW_DATA(struct rsa_public_key, e) 139 }, 140 }; 141 142 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_rsa_keypair_attrs[] = { 143 { 144 .attr_id = TEE_ATTR_RSA_MODULUS, 145 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 146 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 147 RAW_DATA(struct rsa_keypair, n) 148 }, 149 150 { 151 .attr_id = TEE_ATTR_RSA_PUBLIC_EXPONENT, 152 .flags = TEE_TYPE_ATTR_REQUIRED, 153 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 154 RAW_DATA(struct rsa_keypair, e) 155 }, 156 157 { 158 .attr_id = TEE_ATTR_RSA_PRIVATE_EXPONENT, 159 .flags = TEE_TYPE_ATTR_REQUIRED, 160 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 161 RAW_DATA(struct rsa_keypair, d) 162 }, 163 164 { 165 .attr_id = TEE_ATTR_RSA_PRIME1, 166 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 167 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 168 RAW_DATA(struct rsa_keypair, p) 169 }, 170 171 { 172 .attr_id = TEE_ATTR_RSA_PRIME2, 173 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 174 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 175 RAW_DATA(struct rsa_keypair, q) 176 }, 177 178 { 179 .attr_id = TEE_ATTR_RSA_EXPONENT1, 180 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 181 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 182 RAW_DATA(struct rsa_keypair, dp) 183 }, 184 185 { 186 .attr_id = TEE_ATTR_RSA_EXPONENT2, 187 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 188 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 189 RAW_DATA(struct rsa_keypair, dq) 190 }, 191 192 { 193 .attr_id = TEE_ATTR_RSA_COEFFICIENT, 194 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, 195 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 196 RAW_DATA(struct rsa_keypair, qp) 197 }, 198 }; 199 200 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dsa_pub_key_attrs[] = { 201 { 202 .attr_id = TEE_ATTR_DSA_PRIME, 203 .flags = TEE_TYPE_ATTR_REQUIRED, 204 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 205 RAW_DATA(struct dsa_public_key, p) 206 }, 207 208 { 209 .attr_id = TEE_ATTR_DSA_SUBPRIME, 210 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 211 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 212 RAW_DATA(struct dsa_public_key, q) 213 }, 214 215 { 216 .attr_id = TEE_ATTR_DSA_BASE, 217 .flags = TEE_TYPE_ATTR_REQUIRED, 218 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 219 RAW_DATA(struct dsa_public_key, g) 220 }, 221 222 { 223 .attr_id = TEE_ATTR_DSA_PUBLIC_VALUE, 224 .flags = TEE_TYPE_ATTR_REQUIRED, 225 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 226 RAW_DATA(struct dsa_public_key, y) 227 }, 228 }; 229 230 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dsa_keypair_attrs[] = { 231 { 232 .attr_id = TEE_ATTR_DSA_PRIME, 233 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ, 234 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 235 RAW_DATA(struct dsa_keypair, p) 236 }, 237 238 { 239 .attr_id = TEE_ATTR_DSA_SUBPRIME, 240 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | 241 TEE_TYPE_ATTR_GEN_KEY_REQ, 242 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 243 RAW_DATA(struct dsa_keypair, q) 244 }, 245 246 { 247 .attr_id = TEE_ATTR_DSA_BASE, 248 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ, 249 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 250 RAW_DATA(struct dsa_keypair, g) 251 }, 252 253 { 254 .attr_id = TEE_ATTR_DSA_PRIVATE_VALUE, 255 .flags = TEE_TYPE_ATTR_REQUIRED, 256 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 257 RAW_DATA(struct dsa_keypair, x) 258 }, 259 260 { 261 .attr_id = TEE_ATTR_DSA_PUBLIC_VALUE, 262 .flags = TEE_TYPE_ATTR_REQUIRED, 263 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 264 RAW_DATA(struct dsa_keypair, y) 265 }, 266 }; 267 268 static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dh_keypair_attrs[] = { 269 { 270 .attr_id = TEE_ATTR_DH_PRIME, 271 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | 272 TEE_TYPE_ATTR_GEN_KEY_REQ, 273 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 274 RAW_DATA(struct dh_keypair, p) 275 }, 276 277 { 278 .attr_id = TEE_ATTR_DH_BASE, 279 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ, 280 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 281 RAW_DATA(struct dh_keypair, g) 282 }, 283 284 { 285 .attr_id = TEE_ATTR_DH_PUBLIC_VALUE, 286 .flags = TEE_TYPE_ATTR_REQUIRED, 287 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 288 RAW_DATA(struct dh_keypair, y) 289 }, 290 291 { 292 .attr_id = TEE_ATTR_DH_PRIVATE_VALUE, 293 .flags = TEE_TYPE_ATTR_REQUIRED, 294 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 295 RAW_DATA(struct dh_keypair, x) 296 }, 297 298 { 299 .attr_id = TEE_ATTR_DH_SUBPRIME, 300 .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP | TEE_TYPE_ATTR_GEN_KEY_OPT, 301 .conv_func = TEE_TYPE_CONV_FUNC_BIGNUM, 302 RAW_DATA(struct dh_keypair, q) 303 }, 304 305 { 306 .attr_id = TEE_ATTR_DH_X_BITS, 307 .flags = TEE_TYPE_ATTR_GEN_KEY_OPT, 308 .conv_func = TEE_TYPE_CONV_FUNC_VALUE, 309 RAW_DATA(struct dh_keypair, xbits) 310 }, 311 }; 312 313 #if defined(CFG_CRYPTO_HKDF) 314 static const struct tee_cryp_obj_type_attrs 315 tee_cryp_obj_hkdf_ikm_attrs[] = { 316 { 317 .attr_id = TEE_ATTR_HKDF_IKM, 318 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 319 .conv_func = TEE_TYPE_CONV_FUNC_SECRET, 320 .raw_offs = 0, 321 .raw_size = 0 322 }, 323 }; 324 #endif 325 326 #if defined(CFG_CRYPTO_CONCAT_KDF) 327 static const struct tee_cryp_obj_type_attrs 328 tee_cryp_obj_concat_kdf_z_attrs[] = { 329 { 330 .attr_id = TEE_ATTR_CONCAT_KDF_Z, 331 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 332 .conv_func = TEE_TYPE_CONV_FUNC_SECRET, 333 .raw_offs = 0, 334 .raw_size = 0 335 }, 336 }; 337 #endif 338 339 #if defined(CFG_CRYPTO_PBKDF2) 340 static const struct tee_cryp_obj_type_attrs 341 tee_cryp_obj_pbkdf2_passwd_attrs[] = { 342 { 343 .attr_id = TEE_ATTR_PBKDF2_PASSWORD, 344 .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, 345 .conv_func = TEE_TYPE_CONV_FUNC_SECRET, 346 .raw_offs = 0, 347 .raw_size = 0 348 }, 349 }; 350 #endif 351 352 struct tee_cryp_obj_type_props { 353 TEE_ObjectType obj_type; 354 uint16_t min_size; /* may not be smaller than this */ 355 uint16_t max_size; /* may not be larger than this */ 356 uint16_t alloc_size; /* this many bytes are allocated to hold data */ 357 uint8_t quanta; /* may only be an multiple of this */ 358 359 uint8_t num_type_attrs; 360 const struct tee_cryp_obj_type_attrs *type_attrs; 361 }; 362 363 #define PROP(obj_type, quanta, min_size, max_size, alloc_size, type_attrs) \ 364 { (obj_type), (min_size), (max_size), (alloc_size), (quanta), \ 365 TEE_ARRAY_SIZE(type_attrs), (type_attrs) } 366 367 static const struct tee_cryp_obj_type_props tee_cryp_obj_props[] = { 368 PROP(TEE_TYPE_AES, 64, 128, 256, /* valid sizes 128, 192, 256 */ 369 256 / 8 + sizeof(struct tee_cryp_obj_secret), 370 tee_cryp_obj_secret_value_attrs), 371 PROP(TEE_TYPE_DES, 56, 56, 56, 372 /* 373 * Valid size 56 without parity, note that we still allocate 374 * for 64 bits since the key is supplied with parity. 375 */ 376 64 / 8 + sizeof(struct tee_cryp_obj_secret), 377 tee_cryp_obj_secret_value_attrs), 378 PROP(TEE_TYPE_DES3, 56, 112, 168, 379 /* 380 * Valid sizes 112, 168 without parity, note that we still 381 * allocate for with space for the parity since the key is 382 * supplied with parity. 383 */ 384 192 / 8 + sizeof(struct tee_cryp_obj_secret), 385 tee_cryp_obj_secret_value_attrs), 386 PROP(TEE_TYPE_HMAC_MD5, 8, 64, 512, 387 512 / 8 + sizeof(struct tee_cryp_obj_secret), 388 tee_cryp_obj_secret_value_attrs), 389 PROP(TEE_TYPE_HMAC_SHA1, 8, 80, 512, 390 512 / 8 + sizeof(struct tee_cryp_obj_secret), 391 tee_cryp_obj_secret_value_attrs), 392 PROP(TEE_TYPE_HMAC_SHA224, 8, 112, 512, 393 512 / 8 + sizeof(struct tee_cryp_obj_secret), 394 tee_cryp_obj_secret_value_attrs), 395 PROP(TEE_TYPE_HMAC_SHA256, 8, 192, 1024, 396 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 397 tee_cryp_obj_secret_value_attrs), 398 PROP(TEE_TYPE_HMAC_SHA384, 8, 256, 1024, 399 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 400 tee_cryp_obj_secret_value_attrs), 401 PROP(TEE_TYPE_HMAC_SHA512, 8, 256, 1024, 402 1024 / 8 + sizeof(struct tee_cryp_obj_secret), 403 tee_cryp_obj_secret_value_attrs), 404 PROP(TEE_TYPE_GENERIC_SECRET, 8, 0, 4096, 405 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 406 tee_cryp_obj_secret_value_attrs), 407 #if defined(CFG_CRYPTO_HKDF) 408 PROP(TEE_TYPE_HKDF_IKM, 8, 0, 4096, 409 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 410 tee_cryp_obj_hkdf_ikm_attrs), 411 #endif 412 #if defined(CFG_CRYPTO_CONCAT_KDF) 413 PROP(TEE_TYPE_CONCAT_KDF_Z, 8, 0, 4096, 414 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 415 tee_cryp_obj_concat_kdf_z_attrs), 416 #endif 417 #if defined(CFG_CRYPTO_PBKDF2) 418 PROP(TEE_TYPE_PBKDF2_PASSWORD, 8, 0, 4096, 419 4096 / 8 + sizeof(struct tee_cryp_obj_secret), 420 tee_cryp_obj_pbkdf2_passwd_attrs), 421 #endif 422 PROP(TEE_TYPE_RSA_PUBLIC_KEY, 1, 256, 2048, 423 sizeof(struct rsa_public_key), 424 tee_cryp_obj_rsa_pub_key_attrs), 425 426 PROP(TEE_TYPE_RSA_KEYPAIR, 1, 256, 2048, 427 sizeof(struct rsa_keypair), 428 tee_cryp_obj_rsa_keypair_attrs), 429 430 PROP(TEE_TYPE_DSA_PUBLIC_KEY, 64, 512, 1024, 431 sizeof(struct dsa_public_key), 432 tee_cryp_obj_dsa_pub_key_attrs), 433 434 PROP(TEE_TYPE_DSA_KEYPAIR, 64, 512, 1024, 435 sizeof(struct dsa_keypair), 436 tee_cryp_obj_dsa_keypair_attrs), 437 438 PROP(TEE_TYPE_DH_KEYPAIR, 1, 256, 2048, 439 sizeof(struct dh_keypair), 440 tee_cryp_obj_dh_keypair_attrs), 441 }; 442 443 TEE_Result tee_svc_cryp_obj_get_info(uint32_t obj, TEE_ObjectInfo *info) 444 { 445 TEE_Result res; 446 struct tee_ta_session *sess; 447 struct tee_obj *o; 448 449 res = tee_ta_get_current_session(&sess); 450 if (res != TEE_SUCCESS) 451 return res; 452 453 res = tee_obj_get(sess->ctx, obj, &o); 454 if (res != TEE_SUCCESS) 455 return res; 456 457 return tee_svc_copy_to_user(sess, info, &o->info, sizeof(o->info)); 458 } 459 460 TEE_Result tee_svc_cryp_obj_restrict_usage(uint32_t obj, uint32_t usage) 461 { 462 TEE_Result res; 463 struct tee_ta_session *sess; 464 struct tee_obj *o; 465 466 res = tee_ta_get_current_session(&sess); 467 if (res != TEE_SUCCESS) 468 return res; 469 470 res = tee_obj_get(sess->ctx, obj, &o); 471 if (res != TEE_SUCCESS) 472 return res; 473 474 o->info.objectUsage &= usage; 475 476 return TEE_SUCCESS; 477 } 478 479 static TEE_Result tee_svc_cryp_obj_get_raw_data( 480 struct tee_obj *o, 481 const struct tee_cryp_obj_type_props *type_props, 482 size_t idx, void **data, size_t *size) 483 { 484 const struct tee_cryp_obj_type_attrs *type_attr = 485 type_props->type_attrs + idx; 486 if (type_attr->raw_size == 0) { 487 struct tee_cryp_obj_secret *key = 488 (struct tee_cryp_obj_secret *)o->data; 489 490 /* Handle generic secret */ 491 if (type_attr->raw_offs != 0) 492 return TEE_ERROR_BAD_STATE; 493 *size = key->key_size; 494 } else { 495 *size = type_attr->raw_size; 496 } 497 *data = (uint8_t *)o->data + type_attr->raw_offs; 498 return TEE_SUCCESS; 499 } 500 501 static int tee_svc_cryp_obj_find_type_attr_idx( 502 uint32_t attr_id, 503 const struct tee_cryp_obj_type_props *type_props) 504 { 505 size_t n; 506 507 for (n = 0; n < type_props->num_type_attrs; n++) { 508 if (attr_id == type_props->type_attrs[n].attr_id) 509 return n; 510 } 511 return -1; 512 } 513 514 static const struct tee_cryp_obj_type_props *tee_svc_find_type_props( 515 TEE_ObjectType obj_type) 516 { 517 size_t n; 518 519 for (n = 0; n < TEE_ARRAY_SIZE(tee_cryp_obj_props); n++) { 520 if (tee_cryp_obj_props[n].obj_type == obj_type) 521 return tee_cryp_obj_props + n; 522 } 523 524 return NULL; 525 } 526 527 static TEE_Result tee_svc_cryp_obj_copy_out(struct tee_ta_session *sess, 528 void *buffer, uint32_t *size, 529 uint16_t conv_func, 530 void *raw_data, 531 uint32_t raw_data_size) 532 { 533 TEE_Result res; 534 uint32_t s; 535 uint32_t n; 536 uint32_t req_size; 537 uint32_t key_size; 538 struct tee_cryp_obj_secret *obj; 539 struct bignum *bn; 540 uint32_t value[2] = { 0, 0 }; 541 542 res = tee_svc_copy_from_user(sess, &s, size, sizeof(uint32_t)); 543 if (res != TEE_SUCCESS) 544 return res; 545 546 switch (conv_func) { 547 case TEE_TYPE_CONV_FUNC_NONE: 548 549 res = tee_svc_copy_to_user(sess, size, &raw_data_size, 550 sizeof(uint32_t)); 551 if (res != TEE_SUCCESS) 552 return res; 553 if (s < raw_data_size) 554 return TEE_ERROR_SHORT_BUFFER; 555 return tee_svc_copy_to_user(sess, buffer, raw_data, 556 raw_data_size); 557 case TEE_TYPE_CONV_FUNC_SECRET: 558 559 if (!TEE_ALIGNMENT_IS_OK(raw_data, struct tee_cryp_obj_secret)) 560 return TEE_ERROR_BAD_STATE; 561 obj = (struct tee_cryp_obj_secret *)(void *)raw_data; 562 key_size = obj->key_size; 563 res = tee_svc_copy_to_user(sess, size, &key_size, 564 sizeof(uint32_t)); 565 if (res != TEE_SUCCESS) 566 return res; 567 if (s < key_size) 568 return TEE_ERROR_SHORT_BUFFER; 569 return tee_svc_copy_to_user(sess, buffer, obj + 1, 570 key_size); 571 572 case TEE_TYPE_CONV_FUNC_BIGNUM: 573 574 bn = *(struct bignum **)raw_data; 575 req_size = crypto_ops.bignum.num_bytes(bn); 576 if (req_size == 0) 577 return TEE_SUCCESS; 578 res = tee_svc_copy_to_user(sess, size, &req_size, 579 sizeof(uint32_t)); 580 if (res != TEE_SUCCESS) 581 return res; 582 /* Check that the converted result fits the user buffer. */ 583 if (s < req_size) 584 return TEE_ERROR_SHORT_BUFFER; 585 /* Check we can access data using supplied user mode pointer */ 586 res = tee_mmu_check_access_rights(sess->ctx, 587 TEE_MEMORY_ACCESS_READ | 588 TEE_MEMORY_ACCESS_WRITE | 589 TEE_MEMORY_ACCESS_ANY_OWNER, 590 (tee_uaddr_t)buffer, 591 req_size); 592 if (res != TEE_SUCCESS) 593 return res; 594 /* 595 * Write the bignum (wich raw data points to) into an array of 596 * bytes (stored in buffer) 597 */ 598 crypto_ops.bignum.bn2bin(bn, buffer); 599 return TEE_SUCCESS; 600 601 case TEE_TYPE_CONV_FUNC_VALUE: 602 n = sizeof(value); 603 /* 604 * a value attribute consists of two uint32 but have not 605 * seen anything that actaully would need that so this 606 * fills in one with data and the other with zero 607 */ 608 TEE_ASSERT(raw_data_size == sizeof(uint32_t)); 609 value[0] = *(uint32_t *)raw_data; 610 res = tee_svc_copy_to_user(sess, size, &n, sizeof(uint32_t)); 611 if (res != TEE_SUCCESS) 612 return res; 613 /* Check that the converted result fits the user buf */ 614 if (s < n) 615 return TEE_ERROR_SHORT_BUFFER; 616 return tee_svc_copy_to_user(sess, buffer, &value, n); 617 618 default: 619 return TEE_ERROR_BAD_STATE; 620 } 621 } 622 623 TEE_Result tee_svc_cryp_obj_get_attr(uint32_t obj, uint32_t attr_id, 624 void *buffer, uint32_t *size) 625 { 626 TEE_Result res; 627 struct tee_ta_session *sess; 628 struct tee_obj *o; 629 const struct tee_cryp_obj_type_props *type_props; 630 int idx; 631 size_t raw_size; 632 void *raw_data; 633 634 res = tee_ta_get_current_session(&sess); 635 if (res != TEE_SUCCESS) 636 return res; 637 638 res = tee_obj_get(sess->ctx, obj, &o); 639 if (res != TEE_SUCCESS) 640 return TEE_ERROR_ITEM_NOT_FOUND; 641 642 /* Check that the object is initialized */ 643 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 644 return TEE_ERROR_ITEM_NOT_FOUND; 645 646 /* Check that getting the attribute is allowed */ 647 if ((attr_id & TEE_ATTR_BIT_PROTECTED) == 0 && 648 (o->info.objectUsage & TEE_USAGE_EXTRACTABLE) == 0) 649 return TEE_ERROR_ACCESS_DENIED; 650 651 type_props = tee_svc_find_type_props(o->info.objectType); 652 if (!type_props) { 653 /* Unknown object type, "can't happen" */ 654 return TEE_ERROR_BAD_STATE; 655 } 656 657 idx = tee_svc_cryp_obj_find_type_attr_idx(attr_id, type_props); 658 if ((idx < 0) || ((o->have_attrs & (1 << idx)) == 0)) 659 return TEE_ERROR_ITEM_NOT_FOUND; 660 661 res = tee_svc_cryp_obj_get_raw_data(o, type_props, idx, 662 &raw_data, &raw_size); 663 if (res != TEE_SUCCESS) 664 return res; 665 666 return tee_svc_cryp_obj_copy_out(sess, buffer, size, 667 type_props->type_attrs[idx].conv_func, 668 raw_data, raw_size); 669 } 670 671 static void bn_cleanup(struct bignum *bn, bool del) 672 { 673 if (del) 674 crypto_ops.bignum.free(bn); 675 else 676 crypto_ops.bignum.clear(bn); 677 } 678 679 static void cleanup_rsa_keypair(void *p, bool del) 680 { 681 struct rsa_keypair *s = (struct rsa_keypair *)p; 682 683 bn_cleanup(s->e, del); 684 bn_cleanup(s->d, del); 685 bn_cleanup(s->n, del); 686 bn_cleanup(s->p, del); 687 bn_cleanup(s->q, del); 688 bn_cleanup(s->qp, del); 689 bn_cleanup(s->dp, del); 690 bn_cleanup(s->dq, del); 691 } 692 693 static void cleanup_dsa_keypair(void *p, bool del) 694 { 695 struct dsa_keypair *s = (struct dsa_keypair *)p; 696 697 bn_cleanup(s->g, del); 698 bn_cleanup(s->p, del); 699 bn_cleanup(s->q, del); 700 bn_cleanup(s->y, del); 701 bn_cleanup(s->x, del); 702 } 703 704 static void cleanup_rsa_public_key(void *p, bool del) 705 { 706 struct rsa_public_key *s = (struct rsa_public_key *)p; 707 708 bn_cleanup(s->e, del); 709 bn_cleanup(s->n, del); 710 } 711 712 static void cleanup_dsa_public_key(void *p, bool del) 713 { 714 struct dsa_public_key *s = (struct dsa_public_key *)p; 715 716 bn_cleanup(s->g, del); 717 bn_cleanup(s->p, del); 718 bn_cleanup(s->q, del); 719 bn_cleanup(s->y, del); 720 } 721 722 static void cleanup_dh_keypair(void *p, bool del) 723 { 724 struct dh_keypair *s = (struct dh_keypair *)p; 725 726 bn_cleanup(s->g, del); 727 bn_cleanup(s->p, del); 728 bn_cleanup(s->x, del); 729 bn_cleanup(s->y, del); 730 bn_cleanup(s->q, del); 731 s->xbits = 0; 732 } 733 734 static void copy_rsa_public_key(struct rsa_public_key *to, 735 const struct rsa_public_key *from) 736 { 737 crypto_ops.bignum.copy(to->e, from->e); 738 crypto_ops.bignum.copy(to->n, from->n); 739 } 740 741 static void copy_rsa_keypair(struct rsa_keypair *to, 742 const struct rsa_keypair *from) 743 { 744 crypto_ops.bignum.copy(to->e, from->e); 745 crypto_ops.bignum.copy(to->d, from->d); 746 crypto_ops.bignum.copy(to->n, from->n); 747 crypto_ops.bignum.copy(to->p, from->p); 748 crypto_ops.bignum.copy(to->q, from->q); 749 crypto_ops.bignum.copy(to->qp, from->qp); 750 crypto_ops.bignum.copy(to->dp, from->dp); 751 crypto_ops.bignum.copy(to->dq, from->dq); 752 } 753 754 static void copy_dsa_public_key(struct dsa_public_key *to, 755 const struct dsa_public_key *from) 756 { 757 crypto_ops.bignum.copy(to->g, from->g); 758 crypto_ops.bignum.copy(to->p, from->p); 759 crypto_ops.bignum.copy(to->q, from->q); 760 crypto_ops.bignum.copy(to->y, from->y); 761 } 762 763 764 static void copy_dsa_keypair(struct dsa_keypair *to, 765 const struct dsa_keypair *from) 766 { 767 crypto_ops.bignum.copy(to->g, from->g); 768 crypto_ops.bignum.copy(to->p, from->p); 769 crypto_ops.bignum.copy(to->q, from->q); 770 crypto_ops.bignum.copy(to->y, from->y); 771 crypto_ops.bignum.copy(to->x, from->x); 772 } 773 774 static void copy_dh_keypair(struct dh_keypair *to, 775 const struct dh_keypair *from) 776 { 777 crypto_ops.bignum.copy(to->g, from->g); 778 crypto_ops.bignum.copy(to->p, from->p); 779 crypto_ops.bignum.copy(to->y, from->y); 780 crypto_ops.bignum.copy(to->x, from->x); 781 crypto_ops.bignum.copy(to->q, from->q); 782 to->xbits = from->xbits; 783 } 784 785 static void extract_rsa_public_key(struct rsa_public_key *to, 786 const struct rsa_keypair *from) 787 { 788 crypto_ops.bignum.copy(to->e, from->e); 789 crypto_ops.bignum.copy(to->n, from->n); 790 } 791 792 static void extract_dsa_public_key(struct dsa_public_key *to, 793 const struct dsa_keypair *from) 794 { 795 crypto_ops.bignum.copy(to->g, from->g); 796 crypto_ops.bignum.copy(to->p, from->p); 797 crypto_ops.bignum.copy(to->q, from->q); 798 crypto_ops.bignum.copy(to->y, from->y); 799 } 800 801 TEE_Result tee_svc_cryp_obj_alloc(TEE_ObjectType obj_type, 802 uint32_t max_obj_size, uint32_t *obj) 803 { 804 TEE_Result res; 805 struct tee_ta_session *sess; 806 const struct tee_cryp_obj_type_props *type_props; 807 struct tee_obj *o; 808 809 res = tee_ta_get_current_session(&sess); 810 if (res != TEE_SUCCESS) 811 return res; 812 813 /* 814 * Verify that maxObjectSize is supported and find out how 815 * much should be allocated. 816 */ 817 818 /* Find description of object */ 819 type_props = tee_svc_find_type_props(obj_type); 820 if (!type_props) 821 return TEE_ERROR_NOT_SUPPORTED; 822 823 /* Check that maxObjectSize follows restrictions */ 824 if (max_obj_size % type_props->quanta != 0) 825 return TEE_ERROR_NOT_SUPPORTED; 826 if (max_obj_size < type_props->min_size) 827 return TEE_ERROR_NOT_SUPPORTED; 828 if (max_obj_size > type_props->max_size) 829 return TEE_ERROR_NOT_SUPPORTED; 830 831 o = calloc(1, sizeof(*o)); 832 if (!o) 833 return TEE_ERROR_OUT_OF_MEMORY; 834 o->data = calloc(1, type_props->alloc_size); 835 if (!o->data) { 836 free(o); 837 return TEE_ERROR_OUT_OF_MEMORY; 838 } 839 o->data_size = type_props->alloc_size; 840 841 /* If we have a key structure, pre-allocate the bignums inside */ 842 switch (obj_type) { 843 case TEE_TYPE_RSA_PUBLIC_KEY: 844 if (!crypto_ops.acipher.alloc_rsa_public_key) 845 goto notimpl; 846 if (crypto_ops.acipher.alloc_rsa_public_key(o->data, 847 max_obj_size) 848 != TEE_SUCCESS) 849 goto alloc_err; 850 o->cleanup = cleanup_rsa_public_key; 851 break; 852 case TEE_TYPE_RSA_KEYPAIR: 853 if (!crypto_ops.acipher.alloc_rsa_keypair) 854 goto notimpl; 855 if (crypto_ops.acipher.alloc_rsa_keypair(o->data, 856 max_obj_size) 857 != TEE_SUCCESS) 858 goto alloc_err; 859 o->cleanup = cleanup_rsa_keypair; 860 break; 861 case TEE_TYPE_DSA_PUBLIC_KEY: 862 if (!crypto_ops.acipher.alloc_dsa_public_key) 863 goto notimpl; 864 if (crypto_ops.acipher.alloc_dsa_public_key(o->data, 865 max_obj_size) 866 != TEE_SUCCESS) 867 goto alloc_err; 868 o->cleanup = cleanup_dsa_public_key; 869 break; 870 case TEE_TYPE_DSA_KEYPAIR: 871 if (!crypto_ops.acipher.alloc_dsa_keypair) 872 goto notimpl; 873 if (crypto_ops.acipher.alloc_dsa_keypair(o->data, max_obj_size) 874 != TEE_SUCCESS) 875 goto alloc_err; 876 o->cleanup = cleanup_dsa_keypair; 877 break; 878 case TEE_TYPE_DH_KEYPAIR: 879 if (!crypto_ops.acipher.alloc_dh_keypair) 880 goto notimpl; 881 if (crypto_ops.acipher.alloc_dh_keypair(o->data, max_obj_size) 882 != TEE_SUCCESS) 883 goto alloc_err; 884 o->cleanup = cleanup_dh_keypair; 885 break; 886 default: 887 break; 888 } 889 890 o->info.objectType = obj_type; 891 o->info.maxObjectSize = max_obj_size; 892 o->info.objectUsage = TEE_USAGE_DEFAULT; 893 o->info.handleFlags = 0; 894 895 o->fd = -1; 896 897 tee_obj_add(sess->ctx, o); 898 899 res = tee_svc_copy_to_user(sess, obj, &o, sizeof(o)); 900 if (res != TEE_SUCCESS) 901 tee_obj_close(sess->ctx, o); 902 return res; 903 904 alloc_err: 905 free(o->data); 906 free(o); 907 return TEE_ERROR_OUT_OF_MEMORY; 908 notimpl: 909 free(o->data); 910 free(o); 911 return TEE_ERROR_NOT_IMPLEMENTED; 912 } 913 914 TEE_Result tee_svc_cryp_obj_close(uint32_t obj) 915 { 916 TEE_Result res; 917 struct tee_ta_session *sess; 918 struct tee_obj *o; 919 920 res = tee_ta_get_current_session(&sess); 921 if (res != TEE_SUCCESS) 922 return res; 923 924 res = tee_obj_get(sess->ctx, obj, &o); 925 if (res != TEE_SUCCESS) 926 return res; 927 928 /* 929 * If it's busy it's used by an operation, a client should never have 930 * this handle. 931 */ 932 if (o->busy) 933 return TEE_ERROR_ITEM_NOT_FOUND; 934 935 tee_obj_close(sess->ctx, o); 936 return TEE_SUCCESS; 937 } 938 939 TEE_Result tee_svc_cryp_obj_reset(uint32_t obj) 940 { 941 TEE_Result res; 942 struct tee_ta_session *sess; 943 struct tee_obj *o; 944 945 res = tee_ta_get_current_session(&sess); 946 if (res != TEE_SUCCESS) 947 return res; 948 949 res = tee_obj_get(sess->ctx, obj, &o); 950 if (res != TEE_SUCCESS) 951 return res; 952 953 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) == 0) { 954 if (o->cleanup) { 955 /* 956 * o->data contains pointers to key data. 957 * Clear key data, but keep the pointers. 958 */ 959 o->cleanup(o->data, false); 960 } else { 961 memset(o->data, 0, o->data_size); 962 } 963 o->info.objectSize = 0; 964 o->info.objectUsage = TEE_USAGE_DEFAULT; 965 } else { 966 return TEE_ERROR_BAD_PARAMETERS; 967 } 968 969 return TEE_SUCCESS; 970 } 971 972 static TEE_Result tee_svc_cryp_obj_store_attr_raw(uint16_t conv_func, 973 const TEE_Attribute *attr, 974 void *data, size_t data_size) 975 { 976 TEE_Result res; 977 struct tee_cryp_obj_secret *obj; 978 struct bignum *bn; 979 980 if (!attr) 981 return TEE_ERROR_BAD_STATE; 982 983 if (conv_func != TEE_TYPE_CONV_FUNC_VALUE && !attr->content.ref.buffer) 984 return TEE_ERROR_BAD_PARAMETERS; 985 986 switch (conv_func) { 987 case TEE_TYPE_CONV_FUNC_NONE: 988 /* No conversion data size has to match exactly */ 989 if (attr->content.ref.length != data_size) 990 return TEE_ERROR_BAD_PARAMETERS; 991 memcpy(data, attr->content.ref.buffer, data_size); 992 return TEE_SUCCESS; 993 994 case TEE_TYPE_CONV_FUNC_SECRET: 995 if (!TEE_ALIGNMENT_IS_OK(data, struct tee_cryp_obj_secret)) 996 return TEE_ERROR_BAD_STATE; 997 obj = (struct tee_cryp_obj_secret *)(void *)data; 998 999 /* Data size has to fit in allocated buffer */ 1000 if (attr->content.ref.length > 1001 (data_size - sizeof(struct tee_cryp_obj_secret))) 1002 return TEE_ERROR_BAD_PARAMETERS; 1003 1004 memcpy(obj + 1, attr->content.ref.buffer, 1005 attr->content.ref.length); 1006 obj->key_size = attr->content.ref.length; 1007 return TEE_SUCCESS; 1008 1009 case TEE_TYPE_CONV_FUNC_BIGNUM: 1010 /* 1011 * Read the array of bytes (stored in attr->content.ref.buffer) 1012 * and convert it to a bignum (pointed to by data) 1013 */ 1014 bn = *(struct bignum **)data; 1015 if (!crypto_ops.bignum.bin2bn) 1016 return TEE_ERROR_NOT_IMPLEMENTED; 1017 res = crypto_ops.bignum.bin2bn(attr->content.ref.buffer, 1018 attr->content.ref.length, 1019 bn); 1020 return res; 1021 1022 case TEE_TYPE_CONV_FUNC_VALUE: 1023 /* 1024 * a value attribute consists of two uint32 but have not 1025 * seen anything that actaully would need that so this fills 1026 * the data from the first value and discards the second value 1027 */ 1028 *(uint32_t *)data = attr->content.value.a; 1029 1030 return TEE_SUCCESS; 1031 1032 default: 1033 return TEE_ERROR_BAD_STATE; 1034 } 1035 } 1036 1037 1038 static TEE_Result copy_in_attrs(struct tee_ta_ctx *ctx, 1039 const struct abi_user32_attribute *usr_attrs, 1040 uint32_t attr_count, TEE_Attribute *attrs) 1041 { 1042 TEE_Result res; 1043 uint32_t n; 1044 1045 res = tee_mmu_check_access_rights(ctx, 1046 TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, 1047 (tee_uaddr_t)usr_attrs, 1048 attr_count * sizeof(struct abi_user32_attribute)); 1049 if (res != TEE_SUCCESS) 1050 return res; 1051 1052 abi_user_attr32_to_attr(attrs, usr_attrs, attr_count); 1053 1054 for (n = 0; n < attr_count; n++) { 1055 if (attrs[n].attributeID & TEE_ATTR_BIT_VALUE) 1056 continue; 1057 res = tee_mmu_check_access_rights(ctx, TEE_MEMORY_ACCESS_READ | 1058 TEE_MEMORY_ACCESS_ANY_OWNER, 1059 (tee_uaddr_t) 1060 attrs[n].content.ref.buffer, 1061 attrs[n].content.ref.length); 1062 if (res != TEE_SUCCESS) 1063 return res; 1064 } 1065 1066 return TEE_SUCCESS; 1067 } 1068 1069 enum attr_usage { 1070 ATTR_USAGE_POPULATE, 1071 ATTR_USAGE_GENERATE_KEY 1072 }; 1073 1074 static TEE_Result tee_svc_cryp_check_attr(enum attr_usage usage, 1075 const struct tee_cryp_obj_type_props 1076 *type_props, 1077 const TEE_Attribute *attrs, 1078 uint32_t attr_count) 1079 { 1080 uint32_t required_flag; 1081 uint32_t opt_flag; 1082 bool all_opt_needed; 1083 uint32_t req_attrs = 0; 1084 uint32_t opt_grp_attrs = 0; 1085 uint32_t attrs_found = 0; 1086 size_t n; 1087 1088 if (usage == ATTR_USAGE_POPULATE) { 1089 required_flag = TEE_TYPE_ATTR_REQUIRED; 1090 opt_flag = TEE_TYPE_ATTR_OPTIONAL_GROUP; 1091 all_opt_needed = true; 1092 } else { 1093 required_flag = TEE_TYPE_ATTR_GEN_KEY_REQ; 1094 opt_flag = TEE_TYPE_ATTR_GEN_KEY_OPT; 1095 all_opt_needed = false; 1096 } 1097 1098 /* 1099 * First find out which attributes are required and which belong to 1100 * the optional group 1101 */ 1102 for (n = 0; n < type_props->num_type_attrs; n++) { 1103 uint32_t bit = 1 << n; 1104 uint32_t flags = type_props->type_attrs[n].flags; 1105 1106 if (flags & required_flag) 1107 req_attrs |= bit; 1108 else if (flags & opt_flag) 1109 opt_grp_attrs |= bit; 1110 } 1111 1112 /* 1113 * Verify that all required attributes are in place and 1114 * that the same attribute isn't repeated. 1115 */ 1116 for (n = 0; n < attr_count; n++) { 1117 int idx = 1118 tee_svc_cryp_obj_find_type_attr_idx(attrs[n].attributeID, 1119 type_props); 1120 if (idx >= 0) { 1121 uint32_t bit = 1 << idx; 1122 1123 if ((attrs_found & bit) != 0) 1124 return TEE_ERROR_ITEM_NOT_FOUND; 1125 1126 attrs_found |= bit; 1127 } 1128 } 1129 /* Required attribute missing */ 1130 if ((attrs_found & req_attrs) != req_attrs) 1131 return TEE_ERROR_ITEM_NOT_FOUND; 1132 1133 /* 1134 * If the flag says that "if one of the optional attributes are included 1135 * all of them has to be included" this must be checked. 1136 */ 1137 if (all_opt_needed && (attrs_found & opt_grp_attrs) != 0 && 1138 (attrs_found & opt_grp_attrs) != opt_grp_attrs) 1139 return TEE_ERROR_ITEM_NOT_FOUND; 1140 1141 return TEE_SUCCESS; 1142 } 1143 1144 static TEE_Result tee_svc_cryp_obj_populate_type( 1145 struct tee_obj *o, 1146 const struct tee_cryp_obj_type_props *type_props, 1147 const TEE_Attribute *attrs, 1148 uint32_t attr_count) 1149 { 1150 TEE_Result res; 1151 uint32_t have_attrs = 0; 1152 size_t obj_size = 0; 1153 size_t n; 1154 1155 for (n = 0; n < attr_count; n++) { 1156 size_t raw_size; 1157 void *raw_data; 1158 int idx = 1159 tee_svc_cryp_obj_find_type_attr_idx(attrs[n].attributeID, 1160 type_props); 1161 if (idx < 0) 1162 continue; 1163 1164 have_attrs |= 1 << idx; 1165 1166 res = tee_svc_cryp_obj_get_raw_data(o, type_props, idx, 1167 &raw_data, &raw_size); 1168 if (res != TEE_SUCCESS) 1169 return res; 1170 1171 res = 1172 tee_svc_cryp_obj_store_attr_raw( 1173 type_props->type_attrs[idx].conv_func, 1174 attrs + n, raw_data, raw_size); 1175 if (res != TEE_SUCCESS) 1176 return res; 1177 1178 /* 1179 * First attr_idx signifies the attribute that gives the size 1180 * of the object 1181 */ 1182 if (type_props->type_attrs[idx].flags & 1183 TEE_TYPE_ATTR_SIZE_INDICATOR) { 1184 obj_size += attrs[n].content.ref.length * 8; 1185 } 1186 } 1187 1188 /* 1189 * We have to do it like this because the parity bits aren't counted 1190 * when telling the size of the key in bits. 1191 */ 1192 if (o->info.objectType == TEE_TYPE_DES || 1193 o->info.objectType == TEE_TYPE_DES3) 1194 obj_size -= obj_size / 8; /* Exclude parity in size of key */ 1195 1196 o->have_attrs = have_attrs; 1197 o->info.objectSize = obj_size; 1198 return TEE_SUCCESS; 1199 } 1200 1201 TEE_Result tee_svc_cryp_obj_populate(uint32_t obj, 1202 struct abi_user32_attribute *usr_attrs, uint32_t attr_count) 1203 { 1204 TEE_Result res; 1205 struct tee_ta_session *sess; 1206 struct tee_obj *o; 1207 const struct tee_cryp_obj_type_props *type_props; 1208 TEE_Attribute *attrs = NULL; 1209 1210 res = tee_ta_get_current_session(&sess); 1211 if (res != TEE_SUCCESS) 1212 return res; 1213 1214 res = tee_obj_get(sess->ctx, obj, &o); 1215 if (res != TEE_SUCCESS) 1216 return res; 1217 1218 /* Must be a transient object */ 1219 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 1220 return TEE_ERROR_BAD_PARAMETERS; 1221 1222 /* Must not be initialized already */ 1223 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1224 return TEE_ERROR_BAD_PARAMETERS; 1225 1226 type_props = tee_svc_find_type_props(o->info.objectType); 1227 if (!type_props) 1228 return TEE_ERROR_NOT_IMPLEMENTED; 1229 1230 attrs = malloc(sizeof(TEE_Attribute) * attr_count); 1231 if (!attrs) 1232 return TEE_ERROR_OUT_OF_MEMORY; 1233 res = copy_in_attrs(sess->ctx, usr_attrs, attr_count, attrs); 1234 if (res != TEE_SUCCESS) 1235 goto out; 1236 1237 res = tee_svc_cryp_check_attr(ATTR_USAGE_POPULATE, type_props, 1238 attrs, attr_count); 1239 if (res != TEE_SUCCESS) 1240 goto out; 1241 1242 res = tee_svc_cryp_obj_populate_type(o, type_props, attrs, attr_count); 1243 if (res == TEE_SUCCESS) 1244 o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 1245 1246 out: 1247 free(attrs); 1248 return res; 1249 } 1250 1251 TEE_Result tee_svc_cryp_obj_copy(uint32_t dst, uint32_t src) 1252 { 1253 TEE_Result res; 1254 struct tee_ta_session *sess; 1255 struct tee_obj *dst_o; 1256 struct tee_obj *src_o; 1257 1258 res = tee_ta_get_current_session(&sess); 1259 if (res != TEE_SUCCESS) 1260 return res; 1261 1262 res = tee_obj_get(sess->ctx, dst, &dst_o); 1263 if (res != TEE_SUCCESS) 1264 return res; 1265 1266 res = tee_obj_get(sess->ctx, src, &src_o); 1267 if (res != TEE_SUCCESS) 1268 return res; 1269 1270 if ((src_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 1271 return TEE_ERROR_BAD_PARAMETERS; 1272 if ((dst_o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 1273 return TEE_ERROR_BAD_PARAMETERS; 1274 if ((dst_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1275 return TEE_ERROR_BAD_PARAMETERS; 1276 1277 if (dst_o->info.objectType == src_o->info.objectType) { 1278 /* Copy whole data */ 1279 1280 if (dst_o->data_size != src_o->data_size) 1281 return TEE_ERROR_BAD_STATE; 1282 if (dst_o->cleanup != src_o->cleanup) 1283 return TEE_ERROR_BAD_STATE; 1284 1285 dst_o->have_attrs = src_o->have_attrs; 1286 1287 switch (src_o->info.objectType) { 1288 case TEE_TYPE_RSA_PUBLIC_KEY: 1289 copy_rsa_public_key(dst_o->data, src_o->data); 1290 break; 1291 case TEE_TYPE_RSA_KEYPAIR: 1292 copy_rsa_keypair(dst_o->data, src_o->data); 1293 break; 1294 case TEE_TYPE_DSA_PUBLIC_KEY: 1295 copy_dsa_public_key(dst_o->data, src_o->data); 1296 break; 1297 case TEE_TYPE_DSA_KEYPAIR: 1298 copy_dsa_keypair(dst_o->data, src_o->data); 1299 break; 1300 case TEE_TYPE_DH_KEYPAIR: 1301 copy_dh_keypair(dst_o->data, src_o->data); 1302 break; 1303 default: 1304 /* Generic case */ 1305 memcpy(dst_o->data, src_o->data, src_o->data_size); 1306 } 1307 } else if (dst_o->info.objectType == TEE_TYPE_RSA_PUBLIC_KEY && 1308 src_o->info.objectType == TEE_TYPE_RSA_KEYPAIR) { 1309 /* Extract public key from RSA key pair */ 1310 size_t n; 1311 1312 extract_rsa_public_key(dst_o->data, src_o->data); 1313 dst_o->have_attrs = 0; 1314 for (n = 0; n < TEE_ARRAY_SIZE(tee_cryp_obj_rsa_pub_key_attrs); 1315 n++) 1316 dst_o->have_attrs |= 1 << n; 1317 1318 } else if (dst_o->info.objectType == TEE_TYPE_DSA_PUBLIC_KEY && 1319 src_o->info.objectType == TEE_TYPE_DSA_KEYPAIR) { 1320 /* Extract public key from DSA key pair */ 1321 size_t n; 1322 1323 extract_dsa_public_key(dst_o->data, src_o->data); 1324 dst_o->have_attrs = 0; 1325 for (n = 0; n < TEE_ARRAY_SIZE(tee_cryp_obj_dsa_pub_key_attrs); 1326 n++) 1327 dst_o->have_attrs |= 1 << n; 1328 1329 } else { 1330 return TEE_ERROR_BAD_PARAMETERS; 1331 } 1332 1333 dst_o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 1334 dst_o->info.objectSize = src_o->info.objectSize; 1335 dst_o->info.objectUsage = src_o->info.objectUsage; 1336 return TEE_SUCCESS; 1337 } 1338 1339 static TEE_Result tee_svc_obj_generate_key_rsa( 1340 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 1341 uint32_t key_size) 1342 { 1343 TEE_Result res; 1344 struct rsa_keypair *key = o->data; 1345 uint32_t e = TEE_U32_TO_BIG_ENDIAN(65537); 1346 1347 TEE_ASSERT(sizeof(struct rsa_keypair) == o->data_size); 1348 if (!crypto_ops.acipher.gen_rsa_key || !crypto_ops.bignum.bin2bn) 1349 return TEE_ERROR_NOT_IMPLEMENTED; 1350 if (!GET_ATTRIBUTE(o, type_props, TEE_ATTR_RSA_PUBLIC_EXPONENT)) 1351 crypto_ops.bignum.bin2bn((const uint8_t *)&e, sizeof(e), 1352 key->e); 1353 res = crypto_ops.acipher.gen_rsa_key(o->data, key_size); 1354 if (res != TEE_SUCCESS) 1355 return res; 1356 1357 /* Set bits for all known attributes for this object type */ 1358 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 1359 1360 return TEE_SUCCESS; 1361 } 1362 1363 static TEE_Result tee_svc_obj_generate_key_dsa( 1364 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 1365 uint32_t key_size) 1366 { 1367 TEE_Result res; 1368 1369 TEE_ASSERT(sizeof(struct dsa_keypair) == o->data_size); 1370 if (!crypto_ops.acipher.gen_dsa_key) 1371 return TEE_ERROR_NOT_IMPLEMENTED; 1372 res = crypto_ops.acipher.gen_dsa_key(o->data, key_size); 1373 if (res != TEE_SUCCESS) 1374 return res; 1375 1376 /* Set bits for all known attributes for this object type */ 1377 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 1378 1379 return TEE_SUCCESS; 1380 } 1381 1382 static TEE_Result tee_svc_obj_generate_key_dh( 1383 struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, 1384 uint32_t key_size __unused, 1385 const TEE_Attribute *params, uint32_t param_count) 1386 { 1387 TEE_Result res; 1388 struct dh_keypair *tee_dh_key; 1389 struct bignum *dh_q = NULL; 1390 uint32_t dh_xbits = 0; 1391 1392 TEE_ASSERT(sizeof(struct dh_keypair) == o->data_size); 1393 1394 /* Copy the present attributes into the obj before starting */ 1395 res = tee_svc_cryp_obj_populate_type(o, type_props, params, 1396 param_count); 1397 if (res != TEE_SUCCESS) 1398 return res; 1399 1400 tee_dh_key = (struct dh_keypair *)o->data; 1401 1402 if (GET_ATTRIBUTE(o, type_props, TEE_ATTR_DH_SUBPRIME)) 1403 dh_q = tee_dh_key->q; 1404 if (GET_ATTRIBUTE(o, type_props, TEE_ATTR_DH_X_BITS)) 1405 dh_xbits = tee_dh_key->xbits; 1406 if (!crypto_ops.acipher.gen_dh_key) 1407 return TEE_ERROR_NOT_IMPLEMENTED; 1408 res = crypto_ops.acipher.gen_dh_key(tee_dh_key, dh_q, dh_xbits); 1409 if (res != TEE_SUCCESS) 1410 return res; 1411 1412 /* Set bits for the generated public and private key */ 1413 SET_ATTRIBUTE(o, type_props, TEE_ATTR_DH_PUBLIC_VALUE); 1414 SET_ATTRIBUTE(o, type_props, TEE_ATTR_DH_PRIVATE_VALUE); 1415 SET_ATTRIBUTE(o, type_props, TEE_ATTR_DH_X_BITS); 1416 return TEE_SUCCESS; 1417 } 1418 1419 TEE_Result tee_svc_obj_generate_key(uint32_t obj, uint32_t key_size, 1420 const struct abi_user32_attribute *usr_params, 1421 uint32_t param_count) 1422 { 1423 TEE_Result res; 1424 struct tee_ta_session *sess; 1425 const struct tee_cryp_obj_type_props *type_props; 1426 struct tee_obj *o; 1427 struct tee_cryp_obj_secret *key; 1428 size_t byte_size; 1429 TEE_Attribute *params = NULL; 1430 1431 res = tee_ta_get_current_session(&sess); 1432 if (res != TEE_SUCCESS) 1433 return res; 1434 1435 res = tee_obj_get(sess->ctx, obj, &o); 1436 if (res != TEE_SUCCESS) 1437 return res; 1438 1439 /* Must be a transient object */ 1440 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) 1441 return TEE_ERROR_BAD_STATE; 1442 1443 /* Must not be initialized already */ 1444 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) 1445 return TEE_ERROR_BAD_STATE; 1446 1447 /* Find description of object */ 1448 type_props = tee_svc_find_type_props(o->info.objectType); 1449 if (!type_props) 1450 return TEE_ERROR_NOT_SUPPORTED; 1451 1452 /* Check that maxObjectSize follows restrictions */ 1453 if (key_size % type_props->quanta != 0) 1454 return TEE_ERROR_NOT_SUPPORTED; 1455 if (key_size < type_props->min_size) 1456 return TEE_ERROR_NOT_SUPPORTED; 1457 if (key_size > type_props->max_size) 1458 return TEE_ERROR_NOT_SUPPORTED; 1459 1460 params = malloc(sizeof(TEE_Attribute) * param_count); 1461 if (!params) 1462 return TEE_ERROR_OUT_OF_MEMORY; 1463 res = copy_in_attrs(sess->ctx, usr_params, param_count, params); 1464 if (res != TEE_SUCCESS) 1465 goto out; 1466 1467 res = tee_svc_cryp_check_attr(ATTR_USAGE_GENERATE_KEY, type_props, 1468 params, param_count); 1469 if (res != TEE_SUCCESS) 1470 goto out; 1471 1472 switch (o->info.objectType) { 1473 case TEE_TYPE_AES: 1474 case TEE_TYPE_DES: 1475 case TEE_TYPE_DES3: 1476 case TEE_TYPE_HMAC_MD5: 1477 case TEE_TYPE_HMAC_SHA1: 1478 case TEE_TYPE_HMAC_SHA224: 1479 case TEE_TYPE_HMAC_SHA256: 1480 case TEE_TYPE_HMAC_SHA384: 1481 case TEE_TYPE_HMAC_SHA512: 1482 case TEE_TYPE_GENERIC_SECRET: 1483 byte_size = key_size / 8; 1484 1485 /* 1486 * We have to do it like this because the parity bits aren't 1487 * counted when telling the size of the key in bits. 1488 */ 1489 if (o->info.objectType == TEE_TYPE_DES || 1490 o->info.objectType == TEE_TYPE_DES3) { 1491 byte_size = (key_size + key_size / 7) / 8; 1492 } 1493 1494 key = (struct tee_cryp_obj_secret *)o->data; 1495 if (byte_size > (o->data_size - sizeof(*key))) { 1496 res = TEE_ERROR_EXCESS_DATA; 1497 goto out; 1498 } 1499 1500 res = crypto_ops.prng.read((void *)(key + 1), byte_size); 1501 if (res != TEE_SUCCESS) 1502 goto out; 1503 1504 key->key_size = byte_size; 1505 1506 /* Set bits for all known attributes for this object type */ 1507 o->have_attrs = (1 << type_props->num_type_attrs) - 1; 1508 1509 break; 1510 1511 case TEE_TYPE_RSA_KEYPAIR: 1512 res = tee_svc_obj_generate_key_rsa(o, type_props, key_size); 1513 if (res != TEE_SUCCESS) 1514 goto out; 1515 break; 1516 1517 case TEE_TYPE_DSA_KEYPAIR: 1518 res = tee_svc_obj_generate_key_dsa(o, type_props, key_size); 1519 if (res != TEE_SUCCESS) 1520 goto out; 1521 break; 1522 1523 case TEE_TYPE_DH_KEYPAIR: 1524 res = tee_svc_obj_generate_key_dh(o, type_props, key_size, 1525 params, param_count); 1526 if (res != TEE_SUCCESS) 1527 goto out; 1528 break; 1529 1530 default: 1531 res = TEE_ERROR_BAD_FORMAT; 1532 } 1533 1534 out: 1535 free(params); 1536 if (res == TEE_SUCCESS) { 1537 o->info.objectSize = key_size; 1538 o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 1539 } 1540 return res; 1541 } 1542 1543 static TEE_Result tee_svc_cryp_get_state(struct tee_ta_session *sess, 1544 uint32_t state_id, 1545 struct tee_cryp_state **state) 1546 { 1547 struct tee_cryp_state *s; 1548 1549 TAILQ_FOREACH(s, &sess->ctx->cryp_states, link) { 1550 if (state_id == (vaddr_t)s) { 1551 *state = s; 1552 return TEE_SUCCESS; 1553 } 1554 } 1555 return TEE_ERROR_BAD_PARAMETERS; 1556 } 1557 1558 static void cryp_state_free(struct tee_ta_ctx *ctx, struct tee_cryp_state *cs) 1559 { 1560 struct tee_obj *o; 1561 1562 if (tee_obj_get(ctx, cs->key1, &o) == TEE_SUCCESS) 1563 tee_obj_close(ctx, o); 1564 if (tee_obj_get(ctx, cs->key2, &o) == TEE_SUCCESS) 1565 tee_obj_close(ctx, o); 1566 1567 TAILQ_REMOVE(&ctx->cryp_states, cs, link); 1568 if (cs->ctx_finalize != NULL) 1569 cs->ctx_finalize(cs->ctx, cs->algo); 1570 free(cs->ctx); 1571 free(cs); 1572 } 1573 1574 static TEE_Result tee_svc_cryp_check_key_type(const struct tee_obj *o, 1575 uint32_t algo, 1576 TEE_OperationMode mode) 1577 { 1578 uint32_t req_key_type; 1579 1580 switch (TEE_ALG_GET_MAIN_ALG(algo)) { 1581 case TEE_MAIN_ALGO_MD5: 1582 req_key_type = TEE_TYPE_HMAC_MD5; 1583 break; 1584 case TEE_MAIN_ALGO_SHA1: 1585 req_key_type = TEE_TYPE_HMAC_SHA1; 1586 break; 1587 case TEE_MAIN_ALGO_SHA224: 1588 req_key_type = TEE_TYPE_HMAC_SHA224; 1589 break; 1590 case TEE_MAIN_ALGO_SHA256: 1591 req_key_type = TEE_TYPE_HMAC_SHA256; 1592 break; 1593 case TEE_MAIN_ALGO_SHA384: 1594 req_key_type = TEE_TYPE_HMAC_SHA384; 1595 break; 1596 case TEE_MAIN_ALGO_SHA512: 1597 req_key_type = TEE_TYPE_HMAC_SHA512; 1598 break; 1599 case TEE_MAIN_ALGO_AES: 1600 req_key_type = TEE_TYPE_AES; 1601 break; 1602 case TEE_MAIN_ALGO_DES: 1603 req_key_type = TEE_TYPE_DES; 1604 break; 1605 case TEE_MAIN_ALGO_DES3: 1606 req_key_type = TEE_TYPE_DES3; 1607 break; 1608 case TEE_MAIN_ALGO_RSA: 1609 if (mode == TEE_MODE_ENCRYPT || mode == TEE_MODE_VERIFY) 1610 req_key_type = TEE_TYPE_RSA_PUBLIC_KEY; 1611 else 1612 req_key_type = TEE_TYPE_RSA_KEYPAIR; 1613 break; 1614 case TEE_MAIN_ALGO_DSA: 1615 if (mode == TEE_MODE_ENCRYPT || mode == TEE_MODE_VERIFY) 1616 req_key_type = TEE_TYPE_DSA_PUBLIC_KEY; 1617 else 1618 req_key_type = TEE_TYPE_DSA_KEYPAIR; 1619 break; 1620 case TEE_MAIN_ALGO_DH: 1621 req_key_type = TEE_TYPE_DH_KEYPAIR; 1622 break; 1623 #if defined(CFG_CRYPTO_HKDF) 1624 case TEE_MAIN_ALGO_HKDF: 1625 req_key_type = TEE_TYPE_HKDF_IKM; 1626 break; 1627 #endif 1628 #if defined(CFG_CRYPTO_CONCAT_KDF) 1629 case TEE_MAIN_ALGO_CONCAT_KDF: 1630 req_key_type = TEE_TYPE_CONCAT_KDF_Z; 1631 break; 1632 #endif 1633 #if defined(CFG_CRYPTO_PBKDF2) 1634 case TEE_MAIN_ALGO_PBKDF2: 1635 req_key_type = TEE_TYPE_PBKDF2_PASSWORD; 1636 break; 1637 #endif 1638 default: 1639 return TEE_ERROR_BAD_PARAMETERS; 1640 } 1641 1642 if (req_key_type != o->info.objectType) 1643 return TEE_ERROR_BAD_PARAMETERS; 1644 return TEE_SUCCESS; 1645 } 1646 1647 TEE_Result tee_svc_cryp_state_alloc(uint32_t algo, uint32_t mode, 1648 uint32_t key1, uint32_t key2, 1649 uint32_t *state) 1650 { 1651 TEE_Result res; 1652 struct tee_cryp_state *cs; 1653 struct tee_ta_session *sess; 1654 struct tee_obj *o1 = NULL; 1655 struct tee_obj *o2 = NULL; 1656 1657 res = tee_ta_get_current_session(&sess); 1658 if (res != TEE_SUCCESS) 1659 return res; 1660 1661 if (key1 != 0) { 1662 res = tee_obj_get(sess->ctx, key1, &o1); 1663 if (res != TEE_SUCCESS) 1664 return res; 1665 if (o1->busy) 1666 return TEE_ERROR_BAD_PARAMETERS; 1667 res = tee_svc_cryp_check_key_type(o1, algo, mode); 1668 if (res != TEE_SUCCESS) 1669 return res; 1670 } 1671 if (key2 != 0) { 1672 res = tee_obj_get(sess->ctx, key2, &o2); 1673 if (res != TEE_SUCCESS) 1674 return res; 1675 if (o2->busy) 1676 return TEE_ERROR_BAD_PARAMETERS; 1677 res = tee_svc_cryp_check_key_type(o2, algo, mode); 1678 if (res != TEE_SUCCESS) 1679 return res; 1680 } 1681 1682 cs = calloc(1, sizeof(struct tee_cryp_state)); 1683 if (!cs) 1684 return TEE_ERROR_OUT_OF_MEMORY; 1685 TAILQ_INSERT_TAIL(&sess->ctx->cryp_states, cs, link); 1686 cs->algo = algo; 1687 cs->mode = mode; 1688 1689 switch (TEE_ALG_GET_CLASS(algo)) { 1690 case TEE_OPERATION_CIPHER: 1691 if ((algo == TEE_ALG_AES_XTS && (key1 == 0 || key2 == 0)) || 1692 (algo != TEE_ALG_AES_XTS && (key1 == 0 || key2 != 0))) { 1693 res = TEE_ERROR_BAD_PARAMETERS; 1694 } else { 1695 if (crypto_ops.cipher.get_ctx_size) 1696 res = crypto_ops.cipher.get_ctx_size(algo, 1697 &cs->ctx_size); 1698 else 1699 res = TEE_ERROR_NOT_IMPLEMENTED; 1700 if (res != TEE_SUCCESS) 1701 break; 1702 cs->ctx = calloc(1, cs->ctx_size); 1703 if (!cs->ctx) 1704 res = TEE_ERROR_OUT_OF_MEMORY; 1705 } 1706 break; 1707 case TEE_OPERATION_AE: 1708 if (key1 == 0 || key2 != 0) { 1709 res = TEE_ERROR_BAD_PARAMETERS; 1710 } else { 1711 if (crypto_ops.authenc.get_ctx_size) 1712 res = crypto_ops.authenc.get_ctx_size(algo, 1713 &cs->ctx_size); 1714 else 1715 res = TEE_ERROR_NOT_IMPLEMENTED; 1716 if (res != TEE_SUCCESS) 1717 break; 1718 cs->ctx = calloc(1, cs->ctx_size); 1719 if (!cs->ctx) 1720 res = TEE_ERROR_OUT_OF_MEMORY; 1721 } 1722 break; 1723 case TEE_OPERATION_MAC: 1724 if (key1 == 0 || key2 != 0) { 1725 res = TEE_ERROR_BAD_PARAMETERS; 1726 } else { 1727 if (crypto_ops.mac.get_ctx_size) 1728 res = crypto_ops.mac.get_ctx_size(algo, 1729 &cs->ctx_size); 1730 else 1731 res = TEE_ERROR_NOT_IMPLEMENTED; 1732 if (res != TEE_SUCCESS) 1733 break; 1734 cs->ctx = calloc(1, cs->ctx_size); 1735 if (!cs->ctx) 1736 res = TEE_ERROR_OUT_OF_MEMORY; 1737 } 1738 break; 1739 case TEE_OPERATION_DIGEST: 1740 if (key1 != 0 || key2 != 0) { 1741 res = TEE_ERROR_BAD_PARAMETERS; 1742 } else { 1743 if (crypto_ops.hash.get_ctx_size) 1744 res = crypto_ops.hash.get_ctx_size(algo, 1745 &cs->ctx_size); 1746 else 1747 res = TEE_ERROR_NOT_IMPLEMENTED; 1748 if (res != TEE_SUCCESS) 1749 break; 1750 cs->ctx = calloc(1, cs->ctx_size); 1751 if (!cs->ctx) 1752 res = TEE_ERROR_OUT_OF_MEMORY; 1753 } 1754 break; 1755 case TEE_OPERATION_ASYMMETRIC_CIPHER: 1756 case TEE_OPERATION_ASYMMETRIC_SIGNATURE: 1757 if (key1 == 0 || key2 != 0) 1758 res = TEE_ERROR_BAD_PARAMETERS; 1759 break; 1760 case TEE_OPERATION_KEY_DERIVATION: 1761 if (key1 == 0 || key2 != 0) 1762 res = TEE_ERROR_BAD_PARAMETERS; 1763 break; 1764 default: 1765 res = TEE_ERROR_NOT_SUPPORTED; 1766 break; 1767 } 1768 if (res != TEE_SUCCESS) 1769 goto out; 1770 1771 res = tee_svc_copy_to_user(sess, state, &cs, sizeof(uint32_t)); 1772 if (res != TEE_SUCCESS) 1773 goto out; 1774 1775 /* Register keys */ 1776 if (o1 != NULL) { 1777 o1->busy = true; 1778 cs->key1 = key1; 1779 } 1780 if (o2 != NULL) { 1781 o2->busy = true; 1782 cs->key2 = key2; 1783 } 1784 1785 out: 1786 if (res != TEE_SUCCESS) 1787 cryp_state_free(sess->ctx, cs); 1788 return res; 1789 } 1790 1791 TEE_Result tee_svc_cryp_state_copy(uint32_t dst, uint32_t src) 1792 { 1793 TEE_Result res; 1794 struct tee_cryp_state *cs_dst; 1795 struct tee_cryp_state *cs_src; 1796 struct tee_ta_session *sess; 1797 1798 res = tee_ta_get_current_session(&sess); 1799 if (res != TEE_SUCCESS) 1800 return res; 1801 1802 res = tee_svc_cryp_get_state(sess, dst, &cs_dst); 1803 if (res != TEE_SUCCESS) 1804 return res; 1805 res = tee_svc_cryp_get_state(sess, src, &cs_src); 1806 if (res != TEE_SUCCESS) 1807 return res; 1808 if (cs_dst->algo != cs_src->algo || cs_dst->mode != cs_src->mode) 1809 return TEE_ERROR_BAD_PARAMETERS; 1810 /* "Can't happen" */ 1811 if (cs_dst->ctx_size != cs_src->ctx_size) 1812 return TEE_ERROR_BAD_STATE; 1813 1814 memcpy(cs_dst->ctx, cs_src->ctx, cs_src->ctx_size); 1815 return TEE_SUCCESS; 1816 } 1817 1818 void tee_svc_cryp_free_states(struct tee_ta_ctx *ctx) 1819 { 1820 struct tee_cryp_state_head *states = &ctx->cryp_states; 1821 1822 while (!TAILQ_EMPTY(states)) 1823 cryp_state_free(ctx, TAILQ_FIRST(states)); 1824 } 1825 1826 TEE_Result tee_svc_cryp_state_free(uint32_t state) 1827 { 1828 TEE_Result res; 1829 struct tee_cryp_state *cs; 1830 struct tee_ta_session *sess; 1831 1832 res = tee_ta_get_current_session(&sess); 1833 if (res != TEE_SUCCESS) 1834 return res; 1835 1836 res = tee_svc_cryp_get_state(sess, state, &cs); 1837 if (res != TEE_SUCCESS) 1838 return res; 1839 cryp_state_free(sess->ctx, cs); 1840 return TEE_SUCCESS; 1841 } 1842 1843 /* iv and iv_len are ignored for some algorithms */ 1844 TEE_Result tee_svc_hash_init(uint32_t state, const void *iv __unused, 1845 size_t iv_len __unused) 1846 { 1847 TEE_Result res; 1848 struct tee_cryp_state *cs; 1849 struct tee_ta_session *sess; 1850 1851 res = tee_ta_get_current_session(&sess); 1852 if (res != TEE_SUCCESS) 1853 return res; 1854 1855 res = tee_svc_cryp_get_state(sess, state, &cs); 1856 if (res != TEE_SUCCESS) 1857 return res; 1858 1859 switch (TEE_ALG_GET_CLASS(cs->algo)) { 1860 case TEE_OPERATION_DIGEST: 1861 if (!crypto_ops.hash.init) 1862 return TEE_ERROR_NOT_IMPLEMENTED; 1863 res = crypto_ops.hash.init(cs->ctx, cs->algo); 1864 if (res != TEE_SUCCESS) 1865 return res; 1866 break; 1867 case TEE_OPERATION_MAC: 1868 { 1869 struct tee_obj *o; 1870 struct tee_cryp_obj_secret *key; 1871 1872 res = tee_obj_get(sess->ctx, cs->key1, &o); 1873 if (res != TEE_SUCCESS) 1874 return res; 1875 if ((o->info.handleFlags & 1876 TEE_HANDLE_FLAG_INITIALIZED) == 0) 1877 return TEE_ERROR_BAD_PARAMETERS; 1878 1879 key = (struct tee_cryp_obj_secret *)o->data; 1880 if (!crypto_ops.mac.init) 1881 return TEE_ERROR_NOT_IMPLEMENTED; 1882 res = crypto_ops.mac.init(cs->ctx, cs->algo, 1883 (void *)(key + 1), 1884 key->key_size); 1885 if (res != TEE_SUCCESS) 1886 return res; 1887 break; 1888 } 1889 default: 1890 return TEE_ERROR_BAD_PARAMETERS; 1891 } 1892 1893 return TEE_SUCCESS; 1894 } 1895 1896 TEE_Result tee_svc_hash_update(uint32_t state, const void *chunk, 1897 size_t chunk_size) 1898 { 1899 TEE_Result res; 1900 struct tee_cryp_state *cs; 1901 struct tee_ta_session *sess; 1902 1903 /* No data, but size provided isn't valid parameters. */ 1904 if (!chunk && chunk_size) 1905 return TEE_ERROR_BAD_PARAMETERS; 1906 1907 /* Zero length hash is valid, but nothing we need to do. */ 1908 if (!chunk_size) 1909 return TEE_SUCCESS; 1910 1911 res = tee_ta_get_current_session(&sess); 1912 if (res != TEE_SUCCESS) 1913 return res; 1914 1915 res = tee_mmu_check_access_rights(sess->ctx, 1916 TEE_MEMORY_ACCESS_READ | 1917 TEE_MEMORY_ACCESS_ANY_OWNER, 1918 (tee_uaddr_t)chunk, chunk_size); 1919 if (res != TEE_SUCCESS) 1920 return res; 1921 1922 res = tee_svc_cryp_get_state(sess, state, &cs); 1923 if (res != TEE_SUCCESS) 1924 return res; 1925 1926 switch (TEE_ALG_GET_CLASS(cs->algo)) { 1927 case TEE_OPERATION_DIGEST: 1928 if (!crypto_ops.hash.update) 1929 return TEE_ERROR_NOT_IMPLEMENTED; 1930 res = crypto_ops.hash.update(cs->ctx, cs->algo, chunk, 1931 chunk_size); 1932 if (res != TEE_SUCCESS) 1933 return res; 1934 break; 1935 case TEE_OPERATION_MAC: 1936 if (!crypto_ops.mac.update) 1937 return TEE_ERROR_NOT_IMPLEMENTED; 1938 res = crypto_ops.mac.update(cs->ctx, cs->algo, chunk, 1939 chunk_size); 1940 if (res != TEE_SUCCESS) 1941 return res; 1942 break; 1943 default: 1944 return TEE_ERROR_BAD_PARAMETERS; 1945 } 1946 1947 return TEE_SUCCESS; 1948 } 1949 1950 TEE_Result tee_svc_hash_final(uint32_t state, const void *chunk, 1951 size_t chunk_size, void *hash, uint32_t *hash_len) 1952 { 1953 TEE_Result res, res2; 1954 size_t hash_size; 1955 uint32_t hlen; 1956 struct tee_cryp_state *cs; 1957 struct tee_ta_session *sess; 1958 1959 /* No data, but size provided isn't valid parameters. */ 1960 if (!chunk && chunk_size) 1961 return TEE_ERROR_BAD_PARAMETERS; 1962 1963 res = tee_ta_get_current_session(&sess); 1964 if (res != TEE_SUCCESS) 1965 return res; 1966 1967 res = tee_mmu_check_access_rights(sess->ctx, 1968 TEE_MEMORY_ACCESS_READ | 1969 TEE_MEMORY_ACCESS_ANY_OWNER, 1970 (tee_uaddr_t)chunk, chunk_size); 1971 if (res != TEE_SUCCESS) 1972 return res; 1973 1974 res = tee_svc_copy_from_user(sess, &hlen, hash_len, sizeof(uint32_t)); 1975 if (res != TEE_SUCCESS) 1976 return res; 1977 1978 res = tee_mmu_check_access_rights(sess->ctx, 1979 TEE_MEMORY_ACCESS_READ | 1980 TEE_MEMORY_ACCESS_WRITE | 1981 TEE_MEMORY_ACCESS_ANY_OWNER, 1982 (tee_uaddr_t)hash, hlen); 1983 if (res != TEE_SUCCESS) 1984 return res; 1985 1986 res = tee_svc_cryp_get_state(sess, state, &cs); 1987 if (res != TEE_SUCCESS) 1988 return res; 1989 1990 switch (TEE_ALG_GET_CLASS(cs->algo)) { 1991 case TEE_OPERATION_DIGEST: 1992 if (!crypto_ops.hash.update || !crypto_ops.hash.final) 1993 return TEE_ERROR_NOT_IMPLEMENTED; 1994 res = tee_hash_get_digest_size(cs->algo, &hash_size); 1995 if (res != TEE_SUCCESS) 1996 return res; 1997 if (*hash_len < hash_size) { 1998 res = TEE_ERROR_SHORT_BUFFER; 1999 goto out; 2000 } 2001 2002 if (chunk_size) { 2003 res = crypto_ops.hash.update(cs->ctx, cs->algo, chunk, 2004 chunk_size); 2005 if (res != TEE_SUCCESS) 2006 return res; 2007 } 2008 2009 res = crypto_ops.hash.final(cs->ctx, cs->algo, hash, 2010 hash_size); 2011 if (res != TEE_SUCCESS) 2012 return res; 2013 break; 2014 2015 case TEE_OPERATION_MAC: 2016 if (!crypto_ops.mac.update || !crypto_ops.mac.final) 2017 return TEE_ERROR_NOT_IMPLEMENTED; 2018 res = tee_mac_get_digest_size(cs->algo, &hash_size); 2019 if (res != TEE_SUCCESS) 2020 return res; 2021 if (*hash_len < hash_size) { 2022 res = TEE_ERROR_SHORT_BUFFER; 2023 goto out; 2024 } 2025 2026 if (chunk_size) { 2027 res = crypto_ops.mac.update(cs->ctx, cs->algo, chunk, 2028 chunk_size); 2029 if (res != TEE_SUCCESS) 2030 return res; 2031 } 2032 2033 res = crypto_ops.mac.final(cs->ctx, cs->algo, hash, hash_size); 2034 if (res != TEE_SUCCESS) 2035 return res; 2036 break; 2037 2038 default: 2039 return TEE_ERROR_BAD_PARAMETERS; 2040 } 2041 out: 2042 hlen = hash_size; 2043 res2 = tee_svc_copy_to_user(sess, hash_len, &hlen, sizeof(uint32_t)); 2044 if (res2 != TEE_SUCCESS) 2045 return res2; 2046 return res; 2047 } 2048 2049 TEE_Result tee_svc_cipher_init(uint32_t state, const void *iv, size_t iv_len) 2050 { 2051 TEE_Result res; 2052 struct tee_cryp_state *cs; 2053 struct tee_ta_session *sess; 2054 struct tee_obj *o; 2055 struct tee_cryp_obj_secret *key1; 2056 2057 res = tee_ta_get_current_session(&sess); 2058 if (res != TEE_SUCCESS) 2059 return res; 2060 2061 res = tee_svc_cryp_get_state(sess, state, &cs); 2062 if (res != TEE_SUCCESS) 2063 return res; 2064 2065 res = tee_mmu_check_access_rights(sess->ctx, 2066 TEE_MEMORY_ACCESS_READ | 2067 TEE_MEMORY_ACCESS_ANY_OWNER, 2068 (tee_uaddr_t) iv, iv_len); 2069 if (res != TEE_SUCCESS) 2070 return res; 2071 2072 res = tee_obj_get(sess->ctx, cs->key1, &o); 2073 if (res != TEE_SUCCESS) 2074 return res; 2075 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 2076 return TEE_ERROR_BAD_PARAMETERS; 2077 2078 key1 = (struct tee_cryp_obj_secret *)o->data; 2079 2080 if (!crypto_ops.cipher.init) 2081 return TEE_ERROR_NOT_IMPLEMENTED; 2082 2083 if (tee_obj_get(sess->ctx, cs->key2, &o) == TEE_SUCCESS) { 2084 struct tee_cryp_obj_secret *key2 = 2085 (struct tee_cryp_obj_secret *)o->data; 2086 2087 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 2088 return TEE_ERROR_BAD_PARAMETERS; 2089 2090 res = crypto_ops.cipher.init(cs->ctx, cs->algo, cs->mode, 2091 (uint8_t *)(key1 + 1), 2092 key1->key_size, 2093 (uint8_t *)(key2 + 1), 2094 key2->key_size, 2095 iv, iv_len); 2096 } else { 2097 res = crypto_ops.cipher.init(cs->ctx, cs->algo, cs->mode, 2098 (uint8_t *)(key1 + 1), 2099 key1->key_size, 2100 NULL, 2101 0, 2102 iv, iv_len); 2103 } 2104 if (res != TEE_SUCCESS) 2105 return res; 2106 2107 cs->ctx_finalize = crypto_ops.cipher.final; 2108 return TEE_SUCCESS; 2109 } 2110 2111 static TEE_Result tee_svc_cipher_update_helper(uint32_t state, bool last_block, 2112 const void *src, size_t src_len, 2113 void *dst, uint32_t *dst_len) 2114 { 2115 TEE_Result res; 2116 struct tee_cryp_state *cs; 2117 struct tee_ta_session *sess; 2118 uint32_t dlen; 2119 2120 res = tee_ta_get_current_session(&sess); 2121 if (res != TEE_SUCCESS) 2122 return res; 2123 2124 res = tee_svc_cryp_get_state(sess, state, &cs); 2125 if (res != TEE_SUCCESS) 2126 return res; 2127 2128 res = tee_mmu_check_access_rights(sess->ctx, 2129 TEE_MEMORY_ACCESS_READ | 2130 TEE_MEMORY_ACCESS_ANY_OWNER, 2131 (tee_uaddr_t)src, src_len); 2132 if (res != TEE_SUCCESS) 2133 return res; 2134 2135 if (!dst_len) { 2136 dlen = 0; 2137 } else { 2138 res = 2139 tee_svc_copy_from_user(sess, &dlen, dst_len, 2140 sizeof(uint32_t)); 2141 if (res != TEE_SUCCESS) 2142 return res; 2143 2144 res = tee_mmu_check_access_rights(sess->ctx, 2145 TEE_MEMORY_ACCESS_READ | 2146 TEE_MEMORY_ACCESS_WRITE | 2147 TEE_MEMORY_ACCESS_ANY_OWNER, 2148 (tee_uaddr_t)dst, dlen); 2149 if (res != TEE_SUCCESS) 2150 return res; 2151 } 2152 2153 if (dlen < src_len) { 2154 res = TEE_ERROR_SHORT_BUFFER; 2155 goto out; 2156 } 2157 2158 if (src_len > 0) { 2159 /* Permit src_len == 0 to finalize the operation */ 2160 res = tee_do_cipher_update(cs->ctx, cs->algo, cs->mode, 2161 last_block, src, src_len, dst); 2162 } 2163 2164 if (last_block && cs->ctx_finalize != NULL) { 2165 cs->ctx_finalize(cs->ctx, cs->mode); 2166 cs->ctx_finalize = NULL; 2167 } 2168 2169 out: 2170 if ((res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) && 2171 dst_len != NULL) { 2172 TEE_Result res2; 2173 2174 dlen = src_len; 2175 res2 = tee_svc_copy_to_user(sess, dst_len, &dlen, 2176 sizeof(uint32_t)); 2177 if (res2 != TEE_SUCCESS) 2178 res = res2; 2179 } 2180 2181 return res; 2182 } 2183 2184 TEE_Result tee_svc_cipher_update(uint32_t state, const void *src, 2185 size_t src_len, void *dst, uint32_t *dst_len) 2186 { 2187 return tee_svc_cipher_update_helper(state, false /* last_block */, 2188 src, src_len, dst, dst_len); 2189 } 2190 2191 TEE_Result tee_svc_cipher_final(uint32_t state, const void *src, 2192 size_t src_len, void *dst, uint32_t *dst_len) 2193 { 2194 return tee_svc_cipher_update_helper(state, true /* last_block */, 2195 src, src_len, dst, dst_len); 2196 } 2197 2198 #if defined(CFG_CRYPTO_HKDF) 2199 static TEE_Result get_hkdf_params(const TEE_Attribute *params, 2200 uint32_t param_count, 2201 void **salt, size_t *salt_len, void **info, 2202 size_t *info_len, size_t *okm_len) 2203 { 2204 size_t n; 2205 enum { SALT = 0x1, LENGTH = 0x2, INFO = 0x4 }; 2206 uint8_t found = 0; 2207 2208 *salt = *info = NULL; 2209 *salt_len = *info_len = *okm_len = 0; 2210 2211 for (n = 0; n < param_count; n++) { 2212 switch (params[n].attributeID) { 2213 case TEE_ATTR_HKDF_SALT: 2214 if (!(found & SALT)) { 2215 *salt = params[n].content.ref.buffer; 2216 *salt_len = params[n].content.ref.length; 2217 found |= SALT; 2218 } 2219 break; 2220 case TEE_ATTR_HKDF_OKM_LENGTH: 2221 if (!(found & LENGTH)) { 2222 *okm_len = params[n].content.value.a; 2223 found |= LENGTH; 2224 } 2225 break; 2226 case TEE_ATTR_HKDF_INFO: 2227 if (!(found & INFO)) { 2228 *info = params[n].content.ref.buffer; 2229 *info_len = params[n].content.ref.length; 2230 found |= INFO; 2231 } 2232 break; 2233 default: 2234 /* Unexpected attribute */ 2235 return TEE_ERROR_BAD_PARAMETERS; 2236 } 2237 2238 } 2239 2240 if (!(found & LENGTH)) 2241 return TEE_ERROR_BAD_PARAMETERS; 2242 2243 return TEE_SUCCESS; 2244 } 2245 #endif 2246 2247 #if defined(CFG_CRYPTO_CONCAT_KDF) 2248 static TEE_Result get_concat_kdf_params(const TEE_Attribute *params, 2249 uint32_t param_count, 2250 void **other_info, 2251 size_t *other_info_len, 2252 size_t *derived_key_len) 2253 { 2254 size_t n; 2255 enum { LENGTH = 0x1, INFO = 0x2 }; 2256 uint8_t found = 0; 2257 2258 *other_info = NULL; 2259 *other_info_len = *derived_key_len = 0; 2260 2261 for (n = 0; n < param_count; n++) { 2262 switch (params[n].attributeID) { 2263 case TEE_ATTR_CONCAT_KDF_OTHER_INFO: 2264 if (!(found & INFO)) { 2265 *other_info = params[n].content.ref.buffer; 2266 *other_info_len = params[n].content.ref.length; 2267 found |= INFO; 2268 } 2269 break; 2270 case TEE_ATTR_CONCAT_KDF_DKM_LENGTH: 2271 if (!(found & LENGTH)) { 2272 *derived_key_len = params[n].content.value.a; 2273 found |= LENGTH; 2274 } 2275 break; 2276 default: 2277 /* Unexpected attribute */ 2278 return TEE_ERROR_BAD_PARAMETERS; 2279 } 2280 } 2281 2282 if (!(found & LENGTH)) 2283 return TEE_ERROR_BAD_PARAMETERS; 2284 2285 return TEE_SUCCESS; 2286 } 2287 #endif 2288 2289 #if defined(CFG_CRYPTO_PBKDF2) 2290 static TEE_Result get_pbkdf2_params(const TEE_Attribute *params, 2291 uint32_t param_count, void **salt, 2292 size_t *salt_len, size_t *derived_key_len, 2293 size_t *iteration_count) 2294 { 2295 size_t n; 2296 enum { SALT = 0x1, LENGTH = 0x2, COUNT = 0x4 }; 2297 uint8_t found = 0; 2298 2299 *salt = NULL; 2300 *salt_len = *derived_key_len = *iteration_count = 0; 2301 2302 for (n = 0; n < param_count; n++) { 2303 switch (params[n].attributeID) { 2304 case TEE_ATTR_PBKDF2_SALT: 2305 if (!(found & SALT)) { 2306 *salt = params[n].content.ref.buffer; 2307 *salt_len = params[n].content.ref.length; 2308 found |= SALT; 2309 } 2310 break; 2311 case TEE_ATTR_PBKDF2_DKM_LENGTH: 2312 if (!(found & LENGTH)) { 2313 *derived_key_len = params[n].content.value.a; 2314 found |= LENGTH; 2315 } 2316 break; 2317 case TEE_ATTR_PBKDF2_ITERATION_COUNT: 2318 if (!(found & COUNT)) { 2319 *iteration_count = params[n].content.value.a; 2320 found |= COUNT; 2321 } 2322 break; 2323 default: 2324 /* Unexpected attribute */ 2325 return TEE_ERROR_BAD_PARAMETERS; 2326 } 2327 } 2328 2329 if ((found & (LENGTH|COUNT)) != (LENGTH|COUNT)) 2330 return TEE_ERROR_BAD_PARAMETERS; 2331 2332 return TEE_SUCCESS; 2333 } 2334 #endif 2335 2336 TEE_Result tee_svc_cryp_derive_key(uint32_t state, 2337 const struct abi_user32_attribute *usr_params, 2338 uint32_t param_count, uint32_t derived_key) 2339 { 2340 TEE_Result res = TEE_ERROR_NOT_SUPPORTED; 2341 struct tee_ta_session *sess; 2342 struct tee_obj *ko; 2343 struct tee_obj *so; 2344 struct tee_cryp_state *cs; 2345 struct tee_cryp_obj_secret *sk; 2346 const struct tee_cryp_obj_type_props *type_props; 2347 TEE_Attribute *params = NULL; 2348 2349 res = tee_ta_get_current_session(&sess); 2350 if (res != TEE_SUCCESS) 2351 return res; 2352 2353 res = tee_svc_cryp_get_state(sess, state, &cs); 2354 if (res != TEE_SUCCESS) 2355 return res; 2356 2357 params = malloc(sizeof(TEE_Attribute) * param_count); 2358 if (!params) 2359 return TEE_ERROR_OUT_OF_MEMORY; 2360 res = copy_in_attrs(sess->ctx, usr_params, param_count, params); 2361 if (res != TEE_SUCCESS) 2362 goto out; 2363 2364 /* Get key set in operation */ 2365 res = tee_obj_get(sess->ctx, cs->key1, &ko); 2366 if (res != TEE_SUCCESS) 2367 goto out; 2368 2369 res = tee_obj_get(sess->ctx, derived_key, &so); 2370 if (res != TEE_SUCCESS) 2371 goto out; 2372 2373 /* Find information needed about the object to initialize */ 2374 sk = (struct tee_cryp_obj_secret *)so->data; 2375 2376 /* Find description of object */ 2377 type_props = tee_svc_find_type_props(so->info.objectType); 2378 if (!type_props) { 2379 res = TEE_ERROR_NOT_SUPPORTED; 2380 goto out; 2381 } 2382 2383 if (cs->algo == TEE_ALG_DH_DERIVE_SHARED_SECRET) { 2384 size_t alloc_size; 2385 struct bignum *pub; 2386 struct bignum *ss; 2387 2388 if (!crypto_ops.bignum.allocate || 2389 !crypto_ops.bignum.free || 2390 !crypto_ops.bignum.bin2bn || 2391 !crypto_ops.bignum.bn2bin || 2392 !crypto_ops.bignum.num_bytes || 2393 !crypto_ops.acipher.dh_shared_secret) { 2394 res = TEE_ERROR_NOT_IMPLEMENTED; 2395 goto out; 2396 } 2397 if (param_count != 1 || 2398 params[0].attributeID != TEE_ATTR_DH_PUBLIC_VALUE) { 2399 res = TEE_ERROR_BAD_PARAMETERS; 2400 goto out; 2401 } 2402 2403 alloc_size = params[0].content.ref.length * 8; 2404 pub = crypto_ops.bignum.allocate(alloc_size); 2405 ss = crypto_ops.bignum.allocate(alloc_size); 2406 if (pub && ss) { 2407 crypto_ops.bignum.bin2bn(params[0].content.ref.buffer, 2408 params[0].content.ref.length, pub); 2409 res = crypto_ops.acipher.dh_shared_secret(ko->data, 2410 pub, ss); 2411 if (res == TEE_SUCCESS) { 2412 sk->key_size = crypto_ops.bignum.num_bytes(ss); 2413 crypto_ops.bignum.bn2bin(ss, 2414 (uint8_t *)(sk + 1)); 2415 so->info.handleFlags |= 2416 TEE_HANDLE_FLAG_INITIALIZED; 2417 SET_ATTRIBUTE(so, type_props, 2418 TEE_ATTR_SECRET_VALUE); 2419 } 2420 } else { 2421 res = TEE_ERROR_OUT_OF_MEMORY; 2422 } 2423 crypto_ops.bignum.free(pub); 2424 crypto_ops.bignum.free(ss); 2425 } 2426 #if defined(CFG_CRYPTO_HKDF) 2427 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_HKDF) { 2428 void *salt, *info; 2429 size_t salt_len, info_len, okm_len; 2430 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 2431 struct tee_cryp_obj_secret *ik = ko->data; 2432 const uint8_t *ikm = (const uint8_t *)(ik + 1); 2433 2434 res = get_hkdf_params(params, param_count, &salt, &salt_len, 2435 &info, &info_len, &okm_len); 2436 if (res != TEE_SUCCESS) 2437 goto out; 2438 2439 /* Requested size must fit into the output object's buffer */ 2440 if (okm_len > 2441 ko->data_size - sizeof(struct tee_cryp_obj_secret)) { 2442 res = TEE_ERROR_BAD_PARAMETERS; 2443 goto out; 2444 } 2445 2446 res = tee_cryp_hkdf(hash_id, ikm, ik->key_size, salt, salt_len, 2447 info, info_len, (uint8_t *)(sk + 1), 2448 okm_len); 2449 if (res == TEE_SUCCESS) { 2450 sk->key_size = okm_len; 2451 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 2452 SET_ATTRIBUTE(so, type_props, TEE_ATTR_SECRET_VALUE); 2453 } 2454 } 2455 #endif 2456 #if defined(CFG_CRYPTO_CONCAT_KDF) 2457 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_CONCAT_KDF) { 2458 void *info; 2459 size_t info_len, derived_key_len; 2460 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 2461 struct tee_cryp_obj_secret *ss = ko->data; 2462 const uint8_t *shared_secret = (const uint8_t *)(ss + 1); 2463 2464 res = get_concat_kdf_params(params, param_count, &info, 2465 &info_len, &derived_key_len); 2466 if (res != TEE_SUCCESS) 2467 goto out; 2468 2469 /* Requested size must fit into the output object's buffer */ 2470 if (derived_key_len > 2471 ko->data_size - sizeof(struct tee_cryp_obj_secret)) { 2472 res = TEE_ERROR_BAD_PARAMETERS; 2473 goto out; 2474 } 2475 2476 res = tee_cryp_concat_kdf(hash_id, shared_secret, ss->key_size, 2477 info, info_len, (uint8_t *)(sk + 1), 2478 derived_key_len); 2479 if (res == TEE_SUCCESS) { 2480 sk->key_size = derived_key_len; 2481 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 2482 SET_ATTRIBUTE(so, type_props, TEE_ATTR_SECRET_VALUE); 2483 } 2484 } 2485 #endif 2486 #if defined(CFG_CRYPTO_PBKDF2) 2487 else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_PBKDF2) { 2488 void *salt; 2489 size_t salt_len, iteration_count, derived_key_len; 2490 uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); 2491 struct tee_cryp_obj_secret *ss = ko->data; 2492 const uint8_t *password = (const uint8_t *)(ss + 1); 2493 2494 res = get_pbkdf2_params(params, param_count, &salt, &salt_len, 2495 &derived_key_len, &iteration_count); 2496 if (res != TEE_SUCCESS) 2497 goto out; 2498 2499 /* Requested size must fit into the output object's buffer */ 2500 if (derived_key_len > 2501 ko->data_size - sizeof(struct tee_cryp_obj_secret)) { 2502 res = TEE_ERROR_BAD_PARAMETERS; 2503 goto out; 2504 } 2505 2506 res = tee_cryp_pbkdf2(hash_id, password, ss->key_size, salt, 2507 salt_len, iteration_count, 2508 (uint8_t *)(sk + 1), derived_key_len); 2509 if (res == TEE_SUCCESS) { 2510 sk->key_size = derived_key_len; 2511 so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; 2512 SET_ATTRIBUTE(so, type_props, TEE_ATTR_SECRET_VALUE); 2513 } 2514 } 2515 #endif 2516 else 2517 res = TEE_ERROR_NOT_SUPPORTED; 2518 2519 out: 2520 free(params); 2521 return res; 2522 } 2523 2524 TEE_Result tee_svc_cryp_random_number_generate(void *buf, size_t blen) 2525 { 2526 TEE_Result res; 2527 struct tee_ta_session *sess; 2528 2529 res = tee_ta_get_current_session(&sess); 2530 if (res != TEE_SUCCESS) 2531 return res; 2532 2533 res = tee_mmu_check_access_rights(sess->ctx, 2534 TEE_MEMORY_ACCESS_WRITE | 2535 TEE_MEMORY_ACCESS_ANY_OWNER, 2536 (tee_uaddr_t)buf, blen); 2537 if (res != TEE_SUCCESS) 2538 return res; 2539 2540 res = crypto_ops.prng.read(buf, blen); 2541 if (res != TEE_SUCCESS) 2542 return res; 2543 2544 return res; 2545 } 2546 2547 TEE_Result tee_svc_authenc_init(uint32_t state, const void *nonce, 2548 size_t nonce_len, size_t tag_len, 2549 size_t aad_len, size_t payload_len) 2550 { 2551 TEE_Result res; 2552 struct tee_cryp_state *cs; 2553 struct tee_ta_session *sess; 2554 struct tee_obj *o; 2555 struct tee_cryp_obj_secret *key; 2556 2557 res = tee_ta_get_current_session(&sess); 2558 if (res != TEE_SUCCESS) 2559 return res; 2560 2561 res = tee_svc_cryp_get_state(sess, state, &cs); 2562 if (res != TEE_SUCCESS) 2563 return res; 2564 2565 res = tee_obj_get(sess->ctx, cs->key1, &o); 2566 if (res != TEE_SUCCESS) 2567 return res; 2568 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) 2569 return TEE_ERROR_BAD_PARAMETERS; 2570 2571 if (!crypto_ops.authenc.init) 2572 return TEE_ERROR_NOT_IMPLEMENTED; 2573 key = (struct tee_cryp_obj_secret *)o->data; 2574 res = crypto_ops.authenc.init(cs->ctx, cs->algo, cs->mode, 2575 (uint8_t *)(key + 1), key->key_size, 2576 nonce, nonce_len, tag_len, aad_len, 2577 payload_len); 2578 if (res != TEE_SUCCESS) 2579 return res; 2580 2581 cs->ctx_finalize = (tee_cryp_ctx_finalize_func_t) 2582 crypto_ops.authenc.final; 2583 return TEE_SUCCESS; 2584 } 2585 2586 TEE_Result tee_svc_authenc_update_aad(uint32_t state, const void *aad_data, 2587 size_t aad_data_len) 2588 { 2589 TEE_Result res; 2590 struct tee_cryp_state *cs; 2591 struct tee_ta_session *sess; 2592 2593 res = tee_ta_get_current_session(&sess); 2594 if (res != TEE_SUCCESS) 2595 return res; 2596 2597 res = tee_mmu_check_access_rights(sess->ctx, 2598 TEE_MEMORY_ACCESS_READ | 2599 TEE_MEMORY_ACCESS_ANY_OWNER, 2600 (tee_uaddr_t) aad_data, 2601 aad_data_len); 2602 if (res != TEE_SUCCESS) 2603 return res; 2604 2605 res = tee_svc_cryp_get_state(sess, state, &cs); 2606 if (res != TEE_SUCCESS) 2607 return res; 2608 2609 if (!crypto_ops.authenc.update_aad) 2610 return TEE_ERROR_NOT_IMPLEMENTED; 2611 res = crypto_ops.authenc.update_aad(cs->ctx, cs->algo, cs->mode, 2612 aad_data, aad_data_len); 2613 if (res != TEE_SUCCESS) 2614 return res; 2615 2616 return TEE_SUCCESS; 2617 } 2618 2619 TEE_Result tee_svc_authenc_update_payload(uint32_t state, const void *src_data, 2620 size_t src_len, void *dst_data, 2621 uint32_t *dst_len) 2622 { 2623 TEE_Result res; 2624 struct tee_cryp_state *cs; 2625 struct tee_ta_session *sess; 2626 uint32_t dlen; 2627 size_t tmp_dlen; 2628 2629 res = tee_ta_get_current_session(&sess); 2630 if (res != TEE_SUCCESS) 2631 return res; 2632 2633 res = tee_svc_cryp_get_state(sess, state, &cs); 2634 if (res != TEE_SUCCESS) 2635 return res; 2636 2637 res = tee_mmu_check_access_rights(sess->ctx, 2638 TEE_MEMORY_ACCESS_READ | 2639 TEE_MEMORY_ACCESS_ANY_OWNER, 2640 (tee_uaddr_t) src_data, src_len); 2641 if (res != TEE_SUCCESS) 2642 return res; 2643 2644 res = tee_svc_copy_from_user(sess, &dlen, dst_len, sizeof(uint32_t)); 2645 if (res != TEE_SUCCESS) 2646 return res; 2647 2648 res = tee_mmu_check_access_rights(sess->ctx, 2649 TEE_MEMORY_ACCESS_READ | 2650 TEE_MEMORY_ACCESS_WRITE | 2651 TEE_MEMORY_ACCESS_ANY_OWNER, 2652 (tee_uaddr_t)dst_data, dlen); 2653 if (res != TEE_SUCCESS) 2654 return res; 2655 2656 if (dlen < src_len) { 2657 res = TEE_ERROR_SHORT_BUFFER; 2658 goto out; 2659 } 2660 2661 if (!crypto_ops.authenc.update_payload) 2662 return TEE_ERROR_NOT_IMPLEMENTED; 2663 tmp_dlen = dlen; 2664 res = crypto_ops.authenc.update_payload(cs->ctx, cs->algo, cs->mode, 2665 src_data, src_len, dst_data, 2666 &tmp_dlen); 2667 dlen = tmp_dlen; 2668 2669 out: 2670 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 2671 TEE_Result res2 = tee_svc_copy_to_user(sess, dst_len, &dlen, 2672 sizeof(uint32_t)); 2673 if (res2 != TEE_SUCCESS) 2674 res = res2; 2675 } 2676 2677 return res; 2678 } 2679 2680 TEE_Result tee_svc_authenc_enc_final(uint32_t state, const void *src_data, 2681 size_t src_len, void *dst_data, 2682 uint32_t *dst_len, void *tag, 2683 uint32_t *tag_len) 2684 { 2685 TEE_Result res; 2686 struct tee_cryp_state *cs; 2687 struct tee_ta_session *sess; 2688 uint32_t dlen; 2689 uint32_t tlen; 2690 size_t tmp_dlen; 2691 size_t tmp_tlen; 2692 2693 res = tee_ta_get_current_session(&sess); 2694 if (res != TEE_SUCCESS) 2695 return res; 2696 2697 res = tee_svc_cryp_get_state(sess, state, &cs); 2698 if (res != TEE_SUCCESS) 2699 return res; 2700 2701 if (cs->mode != TEE_MODE_ENCRYPT) 2702 return TEE_ERROR_BAD_PARAMETERS; 2703 2704 res = tee_mmu_check_access_rights(sess->ctx, 2705 TEE_MEMORY_ACCESS_READ | 2706 TEE_MEMORY_ACCESS_ANY_OWNER, 2707 (tee_uaddr_t)src_data, src_len); 2708 if (res != TEE_SUCCESS) 2709 return res; 2710 2711 if (!dst_len) { 2712 dlen = 0; 2713 } else { 2714 res = tee_svc_copy_from_user(sess, &dlen, dst_len, 2715 sizeof(uint32_t)); 2716 if (res != TEE_SUCCESS) 2717 return res; 2718 2719 res = tee_mmu_check_access_rights(sess->ctx, 2720 TEE_MEMORY_ACCESS_READ | 2721 TEE_MEMORY_ACCESS_WRITE | 2722 TEE_MEMORY_ACCESS_ANY_OWNER, 2723 (tee_uaddr_t)dst_data, dlen); 2724 if (res != TEE_SUCCESS) 2725 return res; 2726 } 2727 2728 if (dlen < src_len) { 2729 res = TEE_ERROR_SHORT_BUFFER; 2730 goto out; 2731 } 2732 2733 res = tee_svc_copy_from_user(sess, &tlen, tag_len, sizeof(uint32_t)); 2734 if (res != TEE_SUCCESS) 2735 return res; 2736 2737 res = tee_mmu_check_access_rights(sess->ctx, 2738 TEE_MEMORY_ACCESS_READ | 2739 TEE_MEMORY_ACCESS_WRITE | 2740 TEE_MEMORY_ACCESS_ANY_OWNER, 2741 (tee_uaddr_t)tag, tlen); 2742 if (res != TEE_SUCCESS) 2743 return res; 2744 2745 if (!crypto_ops.authenc.enc_final) 2746 return TEE_ERROR_NOT_IMPLEMENTED; 2747 tmp_dlen = dlen; 2748 tmp_tlen = tlen; 2749 res = crypto_ops.authenc.enc_final(cs->ctx, cs->algo, src_data, 2750 src_len, dst_data, &tmp_dlen, tag, 2751 &tmp_tlen); 2752 dlen = tmp_dlen; 2753 tlen = tmp_tlen; 2754 2755 out: 2756 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 2757 TEE_Result res2; 2758 2759 if (dst_len != NULL) { 2760 res2 = tee_svc_copy_to_user(sess, dst_len, &dlen, 2761 sizeof(uint32_t)); 2762 if (res2 != TEE_SUCCESS) 2763 return res2; 2764 } 2765 2766 res2 = tee_svc_copy_to_user(sess, tag_len, &tlen, 2767 sizeof(uint32_t)); 2768 if (res2 != TEE_SUCCESS) 2769 return res2; 2770 } 2771 2772 return res; 2773 } 2774 2775 TEE_Result tee_svc_authenc_dec_final(uint32_t state, const void *src_data, 2776 size_t src_len, void *dst_data, 2777 uint32_t *dst_len, const void *tag, 2778 size_t tag_len) 2779 { 2780 TEE_Result res; 2781 struct tee_cryp_state *cs; 2782 struct tee_ta_session *sess; 2783 uint32_t dlen; 2784 size_t tmp_dlen; 2785 2786 res = tee_ta_get_current_session(&sess); 2787 if (res != TEE_SUCCESS) 2788 return res; 2789 2790 res = tee_svc_cryp_get_state(sess, state, &cs); 2791 if (res != TEE_SUCCESS) 2792 return res; 2793 2794 if (cs->mode != TEE_MODE_DECRYPT) 2795 return TEE_ERROR_BAD_PARAMETERS; 2796 2797 res = tee_mmu_check_access_rights(sess->ctx, 2798 TEE_MEMORY_ACCESS_READ | 2799 TEE_MEMORY_ACCESS_ANY_OWNER, 2800 (tee_uaddr_t)src_data, src_len); 2801 if (res != TEE_SUCCESS) 2802 return res; 2803 2804 if (!dst_len) { 2805 dlen = 0; 2806 } else { 2807 res = tee_svc_copy_from_user(sess, &dlen, dst_len, 2808 sizeof(uint32_t)); 2809 if (res != TEE_SUCCESS) 2810 return res; 2811 2812 res = tee_mmu_check_access_rights(sess->ctx, 2813 TEE_MEMORY_ACCESS_READ | 2814 TEE_MEMORY_ACCESS_WRITE | 2815 TEE_MEMORY_ACCESS_ANY_OWNER, 2816 (tee_uaddr_t)dst_data, dlen); 2817 if (res != TEE_SUCCESS) 2818 return res; 2819 } 2820 2821 if (dlen < src_len) { 2822 res = TEE_ERROR_SHORT_BUFFER; 2823 goto out; 2824 } 2825 2826 res = tee_mmu_check_access_rights(sess->ctx, 2827 TEE_MEMORY_ACCESS_READ | 2828 TEE_MEMORY_ACCESS_ANY_OWNER, 2829 (tee_uaddr_t)tag, tag_len); 2830 if (res != TEE_SUCCESS) 2831 return res; 2832 2833 if (!crypto_ops.authenc.dec_final) 2834 return TEE_ERROR_NOT_IMPLEMENTED; 2835 tmp_dlen = dlen; 2836 res = crypto_ops.authenc.dec_final(cs->ctx, cs->algo, src_data, 2837 src_len, dst_data, &tmp_dlen, tag, 2838 tag_len); 2839 dlen = tmp_dlen; 2840 2841 out: 2842 if ((res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) && 2843 dst_len != NULL) { 2844 TEE_Result res2; 2845 2846 res2 = tee_svc_copy_to_user(sess, dst_len, &dlen, 2847 sizeof(uint32_t)); 2848 if (res2 != TEE_SUCCESS) 2849 return res2; 2850 } 2851 2852 return res; 2853 } 2854 2855 static void tee_svc_asymm_pkcs1_get_salt_len(const TEE_Attribute *params, 2856 uint32_t num_params, int *salt_len) 2857 { 2858 size_t n; 2859 2860 for (n = 0; n < num_params; n++) { 2861 if (params[n].attributeID == TEE_ATTR_RSA_PSS_SALT_LENGTH) { 2862 *salt_len = params[n].content.value.a; 2863 return; 2864 } 2865 } 2866 *salt_len = -1; 2867 } 2868 2869 TEE_Result tee_svc_asymm_operate(uint32_t state, 2870 const struct abi_user32_attribute *usr_params, 2871 uint32_t num_params, const void *src_data, 2872 size_t src_len, void *dst_data, uint32_t *dst_len) 2873 { 2874 TEE_Result res; 2875 struct tee_cryp_state *cs; 2876 struct tee_ta_session *sess; 2877 uint32_t dlen32; 2878 size_t dlen; 2879 struct tee_obj *o; 2880 void *label = NULL; 2881 size_t label_len = 0; 2882 size_t n; 2883 int salt_len; 2884 TEE_Attribute *params = NULL; 2885 2886 res = tee_ta_get_current_session(&sess); 2887 if (res != TEE_SUCCESS) 2888 return res; 2889 2890 res = tee_svc_cryp_get_state(sess, state, &cs); 2891 if (res != TEE_SUCCESS) 2892 return res; 2893 2894 res = tee_mmu_check_access_rights( 2895 sess->ctx, 2896 TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, 2897 (tee_uaddr_t) src_data, src_len); 2898 if (res != TEE_SUCCESS) 2899 return res; 2900 2901 res = tee_svc_copy_from_user(sess, &dlen32, dst_len, sizeof(uint32_t)); 2902 if (res != TEE_SUCCESS) 2903 return res; 2904 dlen = dlen32; 2905 2906 res = tee_mmu_check_access_rights( 2907 sess->ctx, 2908 TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | 2909 TEE_MEMORY_ACCESS_ANY_OWNER, 2910 (tee_uaddr_t) dst_data, dlen); 2911 if (res != TEE_SUCCESS) 2912 return res; 2913 2914 params = malloc(sizeof(TEE_Attribute) * num_params); 2915 if (!params) 2916 return TEE_ERROR_OUT_OF_MEMORY; 2917 res = copy_in_attrs(sess->ctx, usr_params, num_params, params); 2918 if (res != TEE_SUCCESS) 2919 goto out; 2920 2921 res = tee_obj_get(sess->ctx, cs->key1, &o); 2922 if (res != TEE_SUCCESS) 2923 goto out; 2924 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 2925 res = TEE_ERROR_GENERIC; 2926 goto out; 2927 } 2928 2929 switch (cs->algo) { 2930 case TEE_ALG_RSA_NOPAD: 2931 if (cs->mode == TEE_MODE_ENCRYPT) { 2932 if (crypto_ops.acipher.rsanopad_encrypt) 2933 res = crypto_ops.acipher.rsanopad_encrypt( 2934 o->data, src_data, src_len, 2935 dst_data, &dlen); 2936 else 2937 res = TEE_ERROR_NOT_IMPLEMENTED; 2938 } else if (cs->mode == TEE_MODE_DECRYPT) { 2939 if (crypto_ops.acipher.rsanopad_decrypt) 2940 res = crypto_ops.acipher.rsanopad_decrypt( 2941 o->data, src_data, src_len, dst_data, 2942 &dlen); 2943 else 2944 res = TEE_ERROR_NOT_IMPLEMENTED; 2945 } else { 2946 /* 2947 * We will panic because "the mode is not compatible 2948 * with the function" 2949 */ 2950 res = TEE_ERROR_GENERIC; 2951 } 2952 break; 2953 2954 case TEE_ALG_RSAES_PKCS1_V1_5: 2955 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA1: 2956 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA224: 2957 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA256: 2958 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA384: 2959 case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA512: 2960 for (n = 0; n < num_params; n++) { 2961 if (params[n].attributeID == TEE_ATTR_RSA_OAEP_LABEL) { 2962 label = params[n].content.ref.buffer; 2963 label_len = params[n].content.ref.length; 2964 break; 2965 } 2966 } 2967 2968 if (cs->mode == TEE_MODE_ENCRYPT) { 2969 if (crypto_ops.acipher.rsaes_encrypt) 2970 res = crypto_ops.acipher.rsaes_encrypt( 2971 cs->algo, o->data, label, label_len, 2972 src_data, src_len, dst_data, &dlen); 2973 else 2974 res = TEE_ERROR_NOT_IMPLEMENTED; 2975 } else if (cs->mode == TEE_MODE_DECRYPT) { 2976 if (crypto_ops.acipher.rsaes_decrypt) 2977 res = crypto_ops.acipher.rsaes_decrypt( 2978 cs->algo, o->data, 2979 label, label_len, 2980 src_data, src_len, dst_data, &dlen); 2981 else 2982 res = TEE_ERROR_NOT_IMPLEMENTED; 2983 } else { 2984 res = TEE_ERROR_BAD_PARAMETERS; 2985 } 2986 break; 2987 2988 case TEE_ALG_RSASSA_PKCS1_V1_5_MD5: 2989 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA1: 2990 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA224: 2991 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA256: 2992 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA384: 2993 case TEE_ALG_RSASSA_PKCS1_V1_5_SHA512: 2994 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA1: 2995 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA224: 2996 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA256: 2997 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA384: 2998 case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA512: 2999 if (cs->mode != TEE_MODE_SIGN) { 3000 res = TEE_ERROR_BAD_PARAMETERS; 3001 break; 3002 } 3003 tee_svc_asymm_pkcs1_get_salt_len(params, num_params, &salt_len); 3004 3005 if (!crypto_ops.acipher.rsassa_sign) { 3006 res = TEE_ERROR_NOT_IMPLEMENTED; 3007 break; 3008 } 3009 res = crypto_ops.acipher.rsassa_sign(cs->algo, o->data, 3010 salt_len, src_data, 3011 src_len, dst_data, &dlen); 3012 break; 3013 3014 case TEE_ALG_DSA_SHA1: 3015 if (!crypto_ops.acipher.dsa_sign) { 3016 res = TEE_ERROR_NOT_IMPLEMENTED; 3017 break; 3018 } 3019 res = crypto_ops.acipher.dsa_sign(cs->algo, o->data, src_data, 3020 src_len, dst_data, &dlen); 3021 break; 3022 3023 default: 3024 res = TEE_ERROR_BAD_PARAMETERS; 3025 break; 3026 } 3027 3028 out: 3029 free(params); 3030 3031 if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 3032 TEE_Result res2; 3033 3034 dlen32 = dlen; 3035 res2 = tee_svc_copy_to_user(sess, dst_len, &dlen, 3036 sizeof(uint32_t)); 3037 if (res2 != TEE_SUCCESS) 3038 return res2; 3039 } 3040 3041 return res; 3042 } 3043 3044 TEE_Result tee_svc_asymm_verify(uint32_t state, 3045 const struct abi_user32_attribute *usr_params, 3046 uint32_t num_params, const void *data, 3047 size_t data_len, const void *sig, size_t sig_len) 3048 { 3049 TEE_Result res; 3050 struct tee_cryp_state *cs; 3051 struct tee_ta_session *sess; 3052 struct tee_obj *o; 3053 size_t hash_size; 3054 int salt_len; 3055 TEE_Attribute *params = NULL; 3056 3057 res = tee_ta_get_current_session(&sess); 3058 if (res != TEE_SUCCESS) 3059 return res; 3060 3061 res = tee_svc_cryp_get_state(sess, state, &cs); 3062 if (res != TEE_SUCCESS) 3063 return res; 3064 3065 if (cs->mode != TEE_MODE_VERIFY) 3066 return TEE_ERROR_BAD_PARAMETERS; 3067 3068 res = tee_mmu_check_access_rights(sess->ctx, 3069 TEE_MEMORY_ACCESS_READ | 3070 TEE_MEMORY_ACCESS_ANY_OWNER, 3071 (tee_uaddr_t)data, data_len); 3072 if (res != TEE_SUCCESS) 3073 return res; 3074 3075 res = tee_mmu_check_access_rights(sess->ctx, 3076 TEE_MEMORY_ACCESS_READ | 3077 TEE_MEMORY_ACCESS_ANY_OWNER, 3078 (tee_uaddr_t)sig, sig_len); 3079 if (res != TEE_SUCCESS) 3080 return res; 3081 3082 params = malloc(sizeof(TEE_Attribute) * num_params); 3083 if (!params) 3084 return TEE_ERROR_OUT_OF_MEMORY; 3085 res = copy_in_attrs(sess->ctx, usr_params, num_params, params); 3086 if (res != TEE_SUCCESS) 3087 goto out; 3088 3089 res = tee_obj_get(sess->ctx, cs->key1, &o); 3090 if (res != TEE_SUCCESS) 3091 goto out; 3092 if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) { 3093 res = TEE_ERROR_BAD_PARAMETERS; 3094 goto out; 3095 } 3096 3097 res = tee_hash_get_digest_size(TEE_DIGEST_HASH_TO_ALGO(cs->algo), 3098 &hash_size); 3099 if (res != TEE_SUCCESS) 3100 goto out; 3101 3102 if (data_len != hash_size) { 3103 res = TEE_ERROR_BAD_PARAMETERS; 3104 goto out; 3105 } 3106 3107 switch (TEE_ALG_GET_MAIN_ALG(cs->algo)) { 3108 case TEE_MAIN_ALGO_RSA: 3109 tee_svc_asymm_pkcs1_get_salt_len(params, num_params, &salt_len); 3110 if (!crypto_ops.acipher.rsassa_verify) { 3111 res = TEE_ERROR_NOT_IMPLEMENTED; 3112 break; 3113 } 3114 res = crypto_ops.acipher.rsassa_verify(cs->algo, o->data, 3115 salt_len, data, 3116 data_len, sig, sig_len); 3117 break; 3118 3119 case TEE_MAIN_ALGO_DSA: 3120 if (!crypto_ops.acipher.dsa_verify) { 3121 res = TEE_ERROR_NOT_IMPLEMENTED; 3122 break; 3123 } 3124 res = crypto_ops.acipher.dsa_verify(cs->algo, o->data, data, 3125 data_len, sig, sig_len); 3126 break; 3127 3128 default: 3129 res = TEE_ERROR_NOT_SUPPORTED; 3130 } 3131 3132 out: 3133 free(params); 3134 return res; 3135 } 3136