1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2014, STMicroelectronics International N.V. 4 */ 5 6 #include <kernel/mutex.h> 7 #include <kernel/tee_misc.h> 8 #include <kernel/tee_ta_manager.h> 9 #include <mm/tee_mmu.h> 10 #include <string.h> 11 #include <tee_api_defines_extensions.h> 12 #include <tee_api_defines.h> 13 #include <tee/fs_dirfile.h> 14 #include <tee/tee_fs.h> 15 #include <tee/tee_obj.h> 16 #include <tee/tee_pobj.h> 17 #include <tee/tee_svc_cryp.h> 18 #include <tee/tee_svc.h> 19 #include <tee/tee_svc_storage.h> 20 #include <trace.h> 21 22 const struct tee_file_operations *tee_svc_storage_file_ops(uint32_t storage_id) 23 { 24 25 switch (storage_id) { 26 case TEE_STORAGE_PRIVATE: 27 #if defined(CFG_REE_FS) 28 return &ree_fs_ops; 29 #elif defined(CFG_RPMB_FS) 30 return &rpmb_fs_ops; 31 #else 32 #error At least one filesystem must be enabled. 33 #endif 34 #ifdef CFG_REE_FS 35 case TEE_STORAGE_PRIVATE_REE: 36 return &ree_fs_ops; 37 #endif 38 #ifdef CFG_RPMB_FS 39 case TEE_STORAGE_PRIVATE_RPMB: 40 return &rpmb_fs_ops; 41 #endif 42 default: 43 return NULL; 44 } 45 } 46 47 /* Header of GP formated secure storage files */ 48 struct tee_svc_storage_head { 49 uint32_t attr_size; 50 uint32_t keySize; 51 uint32_t maxKeySize; 52 uint32_t objectUsage; 53 uint32_t objectType; 54 uint32_t have_attrs; 55 }; 56 57 struct tee_storage_enum { 58 TAILQ_ENTRY(tee_storage_enum) link; 59 struct tee_fs_dir *dir; 60 const struct tee_file_operations *fops; 61 }; 62 63 static TEE_Result tee_svc_storage_get_enum(struct user_ta_ctx *utc, 64 uint32_t enum_id, 65 struct tee_storage_enum **e_out) 66 { 67 struct tee_storage_enum *e; 68 69 TAILQ_FOREACH(e, &utc->storage_enums, link) { 70 if (enum_id == (vaddr_t)e) { 71 *e_out = e; 72 return TEE_SUCCESS; 73 } 74 } 75 return TEE_ERROR_BAD_PARAMETERS; 76 } 77 78 static TEE_Result tee_svc_close_enum(struct user_ta_ctx *utc, 79 struct tee_storage_enum *e) 80 { 81 if (e == NULL || utc == NULL) 82 return TEE_ERROR_BAD_PARAMETERS; 83 84 TAILQ_REMOVE(&utc->storage_enums, e, link); 85 86 if (e->fops) 87 e->fops->closedir(e->dir); 88 89 e->dir = NULL; 90 e->fops = NULL; 91 92 free(e); 93 94 return TEE_SUCCESS; 95 } 96 97 /* "/TA_uuid/object_id" or "/TA_uuid/.object_id" */ 98 TEE_Result tee_svc_storage_create_filename(void *buf, size_t blen, 99 struct tee_pobj *po, bool transient) 100 { 101 uint8_t *file = buf; 102 uint32_t pos = 0; 103 uint32_t hslen = 1 /* Leading slash */ 104 + TEE_B2HS_HSBUF_SIZE(sizeof(TEE_UUID) + po->obj_id_len) 105 + 1; /* Intermediate slash */ 106 107 /* +1 for the '.' (temporary persistent object) */ 108 if (transient) 109 hslen++; 110 111 if (blen < hslen) 112 return TEE_ERROR_SHORT_BUFFER; 113 114 file[pos++] = '/'; 115 pos += tee_b2hs((uint8_t *)&po->uuid, &file[pos], 116 sizeof(TEE_UUID), hslen); 117 file[pos++] = '/'; 118 119 if (transient) 120 file[pos++] = '.'; 121 122 tee_b2hs(po->obj_id, file + pos, po->obj_id_len, hslen - pos); 123 124 return TEE_SUCCESS; 125 } 126 127 #ifdef CFG_REE_FS 128 /* "/dirf.db" or "/<file number>" */ 129 TEE_Result 130 tee_svc_storage_create_filename_dfh(void *buf, size_t blen, 131 const struct tee_fs_dirfile_fileh *dfh) 132 { 133 char *file = buf; 134 size_t pos = 0; 135 size_t l; 136 137 if (pos >= blen) 138 return TEE_ERROR_SHORT_BUFFER; 139 140 file[pos] = '/'; 141 pos++; 142 if (pos >= blen) 143 return TEE_ERROR_SHORT_BUFFER; 144 145 l = blen - pos; 146 return tee_fs_dirfile_fileh_to_fname(dfh, file + pos, &l); 147 } 148 #endif 149 150 /* "/TA_uuid" */ 151 TEE_Result tee_svc_storage_create_dirname(void *buf, size_t blen, 152 const TEE_UUID *uuid) 153 { 154 uint8_t *dir = buf; 155 uint32_t hslen = TEE_B2HS_HSBUF_SIZE(sizeof(TEE_UUID)) + 1; 156 157 if (blen < hslen) 158 return TEE_ERROR_SHORT_BUFFER; 159 160 dir[0] = '/'; 161 tee_b2hs((uint8_t *)uuid, dir + 1, sizeof(TEE_UUID), hslen); 162 163 return TEE_SUCCESS; 164 } 165 166 static TEE_Result tee_svc_storage_remove_corrupt_obj( 167 struct tee_ta_session *sess, 168 struct tee_obj *o) 169 { 170 o->pobj->fops->remove(o->pobj); 171 tee_obj_close(to_user_ta_ctx(sess->ctx), o); 172 173 return TEE_SUCCESS; 174 } 175 176 static TEE_Result tee_svc_storage_read_head(struct tee_obj *o) 177 { 178 TEE_Result res = TEE_SUCCESS; 179 size_t bytes; 180 struct tee_svc_storage_head head; 181 const struct tee_file_operations *fops = o->pobj->fops; 182 void *attr = NULL; 183 size_t size; 184 size_t tmp = 0; 185 186 assert(!o->fh); 187 res = fops->open(o->pobj, &size, &o->fh); 188 if (res != TEE_SUCCESS) 189 goto exit; 190 191 /* read head */ 192 bytes = sizeof(struct tee_svc_storage_head); 193 res = fops->read(o->fh, 0, &head, &bytes); 194 if (res != TEE_SUCCESS) { 195 if (res == TEE_ERROR_CORRUPT_OBJECT) 196 EMSG("Head corrupt"); 197 goto exit; 198 } 199 200 if (ADD_OVERFLOW(sizeof(head), head.attr_size, &tmp)) { 201 res = TEE_ERROR_OVERFLOW; 202 goto exit; 203 } 204 if (tmp > size) { 205 res = TEE_ERROR_CORRUPT_OBJECT; 206 goto exit; 207 } 208 209 if (bytes != sizeof(struct tee_svc_storage_head)) { 210 res = TEE_ERROR_BAD_FORMAT; 211 goto exit; 212 } 213 214 res = tee_obj_set_type(o, head.objectType, head.maxKeySize); 215 if (res != TEE_SUCCESS) 216 goto exit; 217 218 o->ds_pos = tmp; 219 220 if (head.attr_size) { 221 attr = malloc(head.attr_size); 222 if (!attr) { 223 res = TEE_ERROR_OUT_OF_MEMORY; 224 goto exit; 225 } 226 227 /* read meta */ 228 bytes = head.attr_size; 229 res = fops->read(o->fh, sizeof(struct tee_svc_storage_head), 230 attr, &bytes); 231 if (res == TEE_ERROR_OUT_OF_MEMORY) 232 goto exit; 233 if (res != TEE_SUCCESS || bytes != head.attr_size) 234 res = TEE_ERROR_CORRUPT_OBJECT; 235 if (res) 236 goto exit; 237 } 238 239 res = tee_obj_attr_from_binary(o, attr, head.attr_size); 240 if (res != TEE_SUCCESS) 241 goto exit; 242 243 o->info.dataSize = size - sizeof(head) - head.attr_size; 244 o->info.keySize = head.keySize; 245 o->info.objectUsage = head.objectUsage; 246 o->info.objectType = head.objectType; 247 o->have_attrs = head.have_attrs; 248 249 exit: 250 free(attr); 251 252 return res; 253 } 254 255 TEE_Result syscall_storage_obj_open(unsigned long storage_id, void *object_id, 256 size_t object_id_len, unsigned long flags, 257 uint32_t *obj) 258 { 259 const unsigned long valid_flags = TEE_DATA_FLAG_ACCESS_READ | 260 TEE_DATA_FLAG_ACCESS_WRITE | 261 TEE_DATA_FLAG_ACCESS_WRITE_META | 262 TEE_DATA_FLAG_SHARE_READ | 263 TEE_DATA_FLAG_SHARE_WRITE; 264 const struct tee_file_operations *fops = 265 tee_svc_storage_file_ops(storage_id); 266 struct tee_ta_session *sess = NULL; 267 struct user_ta_ctx *utc = NULL; 268 TEE_Result res = TEE_SUCCESS; 269 struct tee_pobj *po = NULL; 270 struct tee_obj *o = NULL; 271 char *file = NULL; 272 273 if (flags & ~valid_flags) 274 return TEE_ERROR_BAD_PARAMETERS; 275 276 if (!fops) { 277 res = TEE_ERROR_ITEM_NOT_FOUND; 278 goto exit; 279 } 280 281 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) { 282 res = TEE_ERROR_BAD_PARAMETERS; 283 goto exit; 284 } 285 286 res = tee_ta_get_current_session(&sess); 287 if (res != TEE_SUCCESS) 288 goto err; 289 utc = to_user_ta_ctx(sess->ctx); 290 291 res = tee_mmu_check_access_rights(&utc->uctx, 292 TEE_MEMORY_ACCESS_READ, 293 (uaddr_t) object_id, 294 object_id_len); 295 if (res != TEE_SUCCESS) 296 goto err; 297 298 res = tee_pobj_get((void *)&sess->ctx->uuid, object_id, 299 object_id_len, flags, TEE_POBJ_USAGE_OPEN, fops, 300 &po); 301 if (res != TEE_SUCCESS) 302 goto err; 303 304 o = tee_obj_alloc(); 305 if (o == NULL) { 306 tee_pobj_release(po); 307 res = TEE_ERROR_OUT_OF_MEMORY; 308 goto err; 309 } 310 311 o->info.handleFlags = TEE_HANDLE_FLAG_PERSISTENT | 312 TEE_HANDLE_FLAG_INITIALIZED | flags; 313 o->pobj = po; 314 tee_obj_add(utc, o); 315 316 res = tee_svc_storage_read_head(o); 317 if (res != TEE_SUCCESS) { 318 if (res == TEE_ERROR_CORRUPT_OBJECT) { 319 EMSG("Object corrupt"); 320 goto err; 321 } 322 goto oclose; 323 } 324 325 res = tee_svc_copy_kaddr_to_uref(obj, o); 326 if (res != TEE_SUCCESS) 327 goto oclose; 328 329 goto exit; 330 331 oclose: 332 tee_obj_close(utc, o); 333 o = NULL; 334 335 err: 336 if (res == TEE_ERROR_NO_DATA || res == TEE_ERROR_BAD_FORMAT) 337 res = TEE_ERROR_CORRUPT_OBJECT; 338 if (res == TEE_ERROR_CORRUPT_OBJECT && o) 339 tee_svc_storage_remove_corrupt_obj(sess, o); 340 341 exit: 342 free(file); 343 file = NULL; 344 return res; 345 } 346 347 static TEE_Result tee_svc_storage_init_file(struct tee_obj *o, bool overwrite, 348 struct tee_obj *attr_o, void *data, 349 uint32_t len) 350 { 351 TEE_Result res = TEE_SUCCESS; 352 struct tee_svc_storage_head head; 353 const struct tee_file_operations *fops = o->pobj->fops; 354 void *attr = NULL; 355 size_t attr_size = 0; 356 357 if (attr_o) { 358 res = tee_obj_set_type(o, attr_o->info.objectType, 359 attr_o->info.maxKeySize); 360 if (res) 361 return res; 362 res = tee_obj_attr_copy_from(o, attr_o); 363 if (res) 364 return res; 365 o->have_attrs = attr_o->have_attrs; 366 o->info.objectUsage = attr_o->info.objectUsage; 367 o->info.keySize = attr_o->info.keySize; 368 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 369 if (res) 370 return res; 371 if (attr_size) { 372 attr = malloc(attr_size); 373 if (!attr) 374 return TEE_ERROR_OUT_OF_MEMORY; 375 res = tee_obj_attr_to_binary(o, attr, &attr_size); 376 if (res != TEE_SUCCESS) 377 goto exit; 378 } 379 } else { 380 res = tee_obj_set_type(o, TEE_TYPE_DATA, 0); 381 if (res != TEE_SUCCESS) 382 goto exit; 383 } 384 385 o->ds_pos = sizeof(struct tee_svc_storage_head) + attr_size; 386 387 /* write head */ 388 head.attr_size = attr_size; 389 head.keySize = o->info.keySize; 390 head.maxKeySize = o->info.maxKeySize; 391 head.objectUsage = o->info.objectUsage; 392 head.objectType = o->info.objectType; 393 head.have_attrs = o->have_attrs; 394 395 res = fops->create(o->pobj, overwrite, &head, sizeof(head), attr, 396 attr_size, data, len, &o->fh); 397 398 if (!res) 399 o->info.dataSize = len; 400 exit: 401 free(attr); 402 return res; 403 } 404 405 TEE_Result syscall_storage_obj_create(unsigned long storage_id, void *object_id, 406 size_t object_id_len, unsigned long flags, 407 unsigned long attr, void *data, size_t len, 408 uint32_t *obj) 409 { 410 const unsigned long valid_flags = TEE_DATA_FLAG_ACCESS_READ | 411 TEE_DATA_FLAG_ACCESS_WRITE | 412 TEE_DATA_FLAG_ACCESS_WRITE_META | 413 TEE_DATA_FLAG_SHARE_READ | 414 TEE_DATA_FLAG_SHARE_WRITE | 415 TEE_DATA_FLAG_OVERWRITE; 416 const struct tee_file_operations *fops = 417 tee_svc_storage_file_ops(storage_id); 418 struct tee_ta_session *sess = NULL; 419 struct user_ta_ctx *utc = NULL; 420 struct tee_obj *attr_o = NULL; 421 TEE_Result res = TEE_SUCCESS; 422 struct tee_pobj *po = NULL; 423 struct tee_obj *o = NULL; 424 425 if (flags & ~valid_flags) 426 return TEE_ERROR_BAD_PARAMETERS; 427 428 if (!fops) 429 return TEE_ERROR_ITEM_NOT_FOUND; 430 431 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) 432 return TEE_ERROR_BAD_PARAMETERS; 433 434 res = tee_ta_get_current_session(&sess); 435 if (res != TEE_SUCCESS) 436 return res; 437 utc = to_user_ta_ctx(sess->ctx); 438 439 res = tee_mmu_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_READ, 440 (uaddr_t)object_id, object_id_len); 441 if (res != TEE_SUCCESS) 442 goto err; 443 444 res = tee_pobj_get((void *)&sess->ctx->uuid, object_id, 445 object_id_len, flags, TEE_POBJ_USAGE_CREATE, 446 fops, &po); 447 if (res != TEE_SUCCESS) 448 goto err; 449 450 /* check rights of the provided buffer */ 451 if (len) { 452 if (data) { 453 uint32_t f = TEE_MEMORY_ACCESS_READ | 454 TEE_MEMORY_ACCESS_ANY_OWNER; 455 456 res = tee_mmu_check_access_rights(&utc->uctx, f, 457 (uaddr_t)data, len); 458 459 if (res != TEE_SUCCESS) 460 goto err; 461 } else { 462 res = TEE_ERROR_BAD_PARAMETERS; 463 goto err; 464 } 465 } 466 467 o = tee_obj_alloc(); 468 if (o == NULL) { 469 res = TEE_ERROR_OUT_OF_MEMORY; 470 goto err; 471 } 472 473 o->info.handleFlags = TEE_HANDLE_FLAG_PERSISTENT | 474 TEE_HANDLE_FLAG_INITIALIZED | flags; 475 o->pobj = po; 476 477 if (attr != TEE_HANDLE_NULL) { 478 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(attr), 479 &attr_o); 480 if (res != TEE_SUCCESS) 481 goto err; 482 /* The supplied handle must be one of an initialized object */ 483 if (!(attr_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED)) { 484 res = TEE_ERROR_BAD_PARAMETERS; 485 goto err; 486 } 487 } 488 489 res = tee_svc_storage_init_file(o, flags & TEE_DATA_FLAG_OVERWRITE, 490 attr_o, data, len); 491 if (res != TEE_SUCCESS) 492 goto err; 493 494 po = NULL; /* o owns it from now on */ 495 tee_obj_add(utc, o); 496 497 res = tee_svc_copy_kaddr_to_uref(obj, o); 498 if (res != TEE_SUCCESS) 499 goto oclose; 500 501 tee_pobj_create_final(o->pobj); 502 return TEE_SUCCESS; 503 504 oclose: 505 tee_obj_close(utc, o); 506 return res; 507 508 err: 509 if (res == TEE_ERROR_NO_DATA || res == TEE_ERROR_BAD_FORMAT) 510 res = TEE_ERROR_CORRUPT_OBJECT; 511 if (res == TEE_ERROR_CORRUPT_OBJECT && po) 512 fops->remove(po); 513 if (o) { 514 fops->close(&o->fh); 515 tee_obj_free(o); 516 } 517 if (po) 518 tee_pobj_release(po); 519 520 return res; 521 } 522 523 TEE_Result syscall_storage_obj_del(unsigned long obj) 524 { 525 TEE_Result res; 526 struct tee_ta_session *sess; 527 struct tee_obj *o; 528 struct user_ta_ctx *utc; 529 530 res = tee_ta_get_current_session(&sess); 531 if (res != TEE_SUCCESS) 532 return res; 533 utc = to_user_ta_ctx(sess->ctx); 534 535 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(obj), &o); 536 if (res != TEE_SUCCESS) 537 return res; 538 539 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_WRITE_META)) 540 return TEE_ERROR_ACCESS_CONFLICT; 541 542 if (o->pobj == NULL || o->pobj->obj_id == NULL) 543 return TEE_ERROR_BAD_STATE; 544 545 res = o->pobj->fops->remove(o->pobj); 546 tee_obj_close(utc, o); 547 548 return res; 549 } 550 551 TEE_Result syscall_storage_obj_rename(unsigned long obj, void *object_id, 552 size_t object_id_len) 553 { 554 const struct tee_file_operations *fops = NULL; 555 struct tee_ta_session *sess = NULL; 556 struct user_ta_ctx *utc = NULL; 557 TEE_Result res = TEE_SUCCESS; 558 struct tee_pobj *po = NULL; 559 struct tee_obj *o = NULL; 560 char *new_file = NULL; 561 char *old_file = NULL; 562 563 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) 564 return TEE_ERROR_BAD_PARAMETERS; 565 566 res = tee_ta_get_current_session(&sess); 567 if (res != TEE_SUCCESS) 568 return res; 569 utc = to_user_ta_ctx(sess->ctx); 570 571 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(obj), &o); 572 if (res != TEE_SUCCESS) 573 return res; 574 575 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 576 res = TEE_ERROR_BAD_STATE; 577 goto exit; 578 } 579 580 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_WRITE_META)) { 581 res = TEE_ERROR_BAD_STATE; 582 goto exit; 583 } 584 585 if (o->pobj == NULL || o->pobj->obj_id == NULL) { 586 res = TEE_ERROR_BAD_STATE; 587 goto exit; 588 } 589 590 res = tee_mmu_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_READ, 591 (uaddr_t)object_id, object_id_len); 592 if (res != TEE_SUCCESS) 593 goto exit; 594 595 /* reserve dest name */ 596 fops = o->pobj->fops; 597 res = tee_pobj_get((void *)&sess->ctx->uuid, object_id, 598 object_id_len, TEE_DATA_FLAG_ACCESS_WRITE_META, 599 TEE_POBJ_USAGE_RENAME, fops, &po); 600 if (res != TEE_SUCCESS) 601 goto exit; 602 603 /* move */ 604 res = fops->rename(o->pobj, po, false /* no overwrite */); 605 if (res) 606 goto exit; 607 608 res = tee_pobj_rename(o->pobj, object_id, object_id_len); 609 610 exit: 611 tee_pobj_release(po); 612 613 free(new_file); 614 free(old_file); 615 616 return res; 617 } 618 619 TEE_Result syscall_storage_alloc_enum(uint32_t *obj_enum) 620 { 621 struct tee_storage_enum *e; 622 struct tee_ta_session *sess; 623 TEE_Result res; 624 struct user_ta_ctx *utc; 625 626 if (obj_enum == NULL) 627 return TEE_ERROR_BAD_PARAMETERS; 628 629 res = tee_ta_get_current_session(&sess); 630 if (res != TEE_SUCCESS) 631 return res; 632 utc = to_user_ta_ctx(sess->ctx); 633 634 e = malloc(sizeof(struct tee_storage_enum)); 635 if (e == NULL) 636 return TEE_ERROR_OUT_OF_MEMORY; 637 638 e->dir = NULL; 639 e->fops = NULL; 640 TAILQ_INSERT_TAIL(&utc->storage_enums, e, link); 641 642 return tee_svc_copy_kaddr_to_uref(obj_enum, e); 643 } 644 645 TEE_Result syscall_storage_free_enum(unsigned long obj_enum) 646 { 647 struct tee_storage_enum *e; 648 TEE_Result res; 649 struct tee_ta_session *sess; 650 struct user_ta_ctx *utc; 651 652 res = tee_ta_get_current_session(&sess); 653 if (res != TEE_SUCCESS) 654 return res; 655 utc = to_user_ta_ctx(sess->ctx); 656 657 res = tee_svc_storage_get_enum(utc, 658 tee_svc_uref_to_vaddr(obj_enum), &e); 659 if (res != TEE_SUCCESS) 660 return res; 661 662 return tee_svc_close_enum(utc, e); 663 } 664 665 TEE_Result syscall_storage_reset_enum(unsigned long obj_enum) 666 { 667 struct tee_storage_enum *e; 668 TEE_Result res; 669 struct tee_ta_session *sess; 670 671 res = tee_ta_get_current_session(&sess); 672 if (res != TEE_SUCCESS) 673 return res; 674 675 res = tee_svc_storage_get_enum(to_user_ta_ctx(sess->ctx), 676 tee_svc_uref_to_vaddr(obj_enum), &e); 677 if (res != TEE_SUCCESS) 678 return res; 679 680 if (e->fops) { 681 e->fops->closedir(e->dir); 682 e->fops = NULL; 683 e->dir = NULL; 684 } 685 assert(!e->dir); 686 687 return TEE_SUCCESS; 688 } 689 690 TEE_Result syscall_storage_start_enum(unsigned long obj_enum, 691 unsigned long storage_id) 692 { 693 struct tee_storage_enum *e; 694 TEE_Result res; 695 struct tee_ta_session *sess; 696 const struct tee_file_operations *fops = 697 tee_svc_storage_file_ops(storage_id); 698 699 res = tee_ta_get_current_session(&sess); 700 if (res != TEE_SUCCESS) 701 return res; 702 703 res = tee_svc_storage_get_enum(to_user_ta_ctx(sess->ctx), 704 tee_svc_uref_to_vaddr(obj_enum), &e); 705 if (res != TEE_SUCCESS) 706 return res; 707 708 if (e->dir) { 709 e->fops->closedir(e->dir); 710 e->dir = NULL; 711 } 712 713 if (!fops) 714 return TEE_ERROR_ITEM_NOT_FOUND; 715 716 e->fops = fops; 717 718 return fops->opendir(&sess->ctx->uuid, &e->dir); 719 } 720 721 TEE_Result syscall_storage_next_enum(unsigned long obj_enum, 722 TEE_ObjectInfo *info, void *obj_id, uint64_t *len) 723 { 724 struct tee_ta_session *sess = NULL; 725 struct tee_storage_enum *e = NULL; 726 struct tee_fs_dirent *d = NULL; 727 struct user_ta_ctx *utc = NULL; 728 TEE_Result res = TEE_SUCCESS; 729 struct tee_obj *o = NULL; 730 uint64_t l = 0; 731 732 res = tee_ta_get_current_session(&sess); 733 if (res != TEE_SUCCESS) 734 goto exit; 735 utc = to_user_ta_ctx(sess->ctx); 736 737 res = tee_svc_storage_get_enum(utc, 738 tee_svc_uref_to_vaddr(obj_enum), &e); 739 if (res != TEE_SUCCESS) 740 goto exit; 741 742 /* check rights of the provided buffers */ 743 res = tee_mmu_check_access_rights(&utc->uctx, 744 TEE_MEMORY_ACCESS_WRITE | 745 TEE_MEMORY_ACCESS_ANY_OWNER, 746 (uaddr_t)info, 747 sizeof(TEE_ObjectInfo)); 748 if (res != TEE_SUCCESS) 749 goto exit; 750 751 res = tee_mmu_check_access_rights(&utc->uctx, 752 TEE_MEMORY_ACCESS_WRITE | 753 TEE_MEMORY_ACCESS_ANY_OWNER, 754 (uaddr_t)obj_id, 755 TEE_OBJECT_ID_MAX_LEN); 756 if (res != TEE_SUCCESS) 757 goto exit; 758 759 if (!e->fops) { 760 res = TEE_ERROR_ITEM_NOT_FOUND; 761 goto exit; 762 } 763 764 res = e->fops->readdir(e->dir, &d); 765 if (res != TEE_SUCCESS) 766 goto exit; 767 768 o = tee_obj_alloc(); 769 if (o == NULL) { 770 res = TEE_ERROR_OUT_OF_MEMORY; 771 goto exit; 772 } 773 774 res = tee_pobj_get(&sess->ctx->uuid, d->oid, d->oidlen, 0, 775 TEE_POBJ_USAGE_ENUM, e->fops, &o->pobj); 776 if (res) 777 goto exit; 778 779 o->info.handleFlags = o->pobj->flags | TEE_HANDLE_FLAG_PERSISTENT | 780 TEE_HANDLE_FLAG_INITIALIZED; 781 782 res = tee_svc_storage_read_head(o); 783 if (res != TEE_SUCCESS) 784 goto exit; 785 786 memcpy(info, &o->info, sizeof(TEE_ObjectInfo)); 787 memcpy(obj_id, o->pobj->obj_id, o->pobj->obj_id_len); 788 789 l = o->pobj->obj_id_len; 790 res = tee_svc_copy_to_user(len, &l, sizeof(*len)); 791 792 exit: 793 if (o) { 794 tee_pobj_release(o->pobj); 795 tee_obj_free(o); 796 } 797 798 return res; 799 } 800 801 TEE_Result syscall_storage_obj_read(unsigned long obj, void *data, size_t len, 802 uint64_t *count) 803 { 804 struct tee_ta_session *sess = NULL; 805 struct user_ta_ctx *utc = NULL; 806 TEE_Result res = TEE_SUCCESS; 807 struct tee_obj *o = NULL; 808 uint64_t u_count = 0; 809 size_t pos_tmp = 0; 810 size_t bytes = 0; 811 812 res = tee_ta_get_current_session(&sess); 813 if (res != TEE_SUCCESS) 814 goto exit; 815 utc = to_user_ta_ctx(sess->ctx); 816 817 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(obj), &o); 818 if (res != TEE_SUCCESS) 819 goto exit; 820 821 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 822 res = TEE_ERROR_BAD_STATE; 823 goto exit; 824 } 825 826 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_READ)) { 827 res = TEE_ERROR_ACCESS_CONFLICT; 828 goto exit; 829 } 830 831 /* Guard o->info.dataPosition += bytes below from overflowing */ 832 if (ADD_OVERFLOW(o->info.dataPosition, len, &pos_tmp)) { 833 res = TEE_ERROR_OVERFLOW; 834 goto exit; 835 } 836 837 /* check rights of the provided buffer */ 838 res = tee_mmu_check_access_rights(&utc->uctx, 839 TEE_MEMORY_ACCESS_WRITE | 840 TEE_MEMORY_ACCESS_ANY_OWNER, 841 (uaddr_t)data, len); 842 if (res != TEE_SUCCESS) 843 goto exit; 844 845 bytes = len; 846 if (ADD_OVERFLOW(o->ds_pos, o->info.dataPosition, &pos_tmp)) { 847 res = TEE_ERROR_OVERFLOW; 848 goto exit; 849 } 850 res = o->pobj->fops->read(o->fh, pos_tmp, data, &bytes); 851 if (res != TEE_SUCCESS) { 852 if (res == TEE_ERROR_CORRUPT_OBJECT) { 853 EMSG("Object corrupt"); 854 tee_svc_storage_remove_corrupt_obj(sess, o); 855 } 856 goto exit; 857 } 858 859 o->info.dataPosition += bytes; 860 861 u_count = bytes; 862 res = tee_svc_copy_to_user(count, &u_count, sizeof(*count)); 863 exit: 864 return res; 865 } 866 867 TEE_Result syscall_storage_obj_write(unsigned long obj, void *data, size_t len) 868 { 869 struct tee_ta_session *sess = NULL; 870 struct user_ta_ctx *utc = NULL; 871 TEE_Result res = TEE_SUCCESS; 872 struct tee_obj *o = NULL; 873 size_t pos_tmp = 0; 874 875 res = tee_ta_get_current_session(&sess); 876 if (res != TEE_SUCCESS) 877 goto exit; 878 utc = to_user_ta_ctx(sess->ctx); 879 880 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(obj), &o); 881 if (res != TEE_SUCCESS) 882 goto exit; 883 884 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 885 res = TEE_ERROR_BAD_STATE; 886 goto exit; 887 } 888 889 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_WRITE)) { 890 res = TEE_ERROR_ACCESS_CONFLICT; 891 goto exit; 892 } 893 894 /* Guard o->info.dataPosition += bytes below from overflowing */ 895 if (ADD_OVERFLOW(o->info.dataPosition, len, &pos_tmp)) { 896 res = TEE_ERROR_OVERFLOW; 897 goto exit; 898 } 899 900 /* check rights of the provided buffer */ 901 res = tee_mmu_check_access_rights(&utc->uctx, 902 TEE_MEMORY_ACCESS_READ | 903 TEE_MEMORY_ACCESS_ANY_OWNER, 904 (uaddr_t)data, len); 905 if (res != TEE_SUCCESS) 906 goto exit; 907 908 if (ADD_OVERFLOW(o->ds_pos, o->info.dataPosition, &pos_tmp)) { 909 res = TEE_ERROR_ACCESS_CONFLICT; 910 goto exit; 911 } 912 res = o->pobj->fops->write(o->fh, pos_tmp, data, len); 913 if (res != TEE_SUCCESS) 914 goto exit; 915 916 o->info.dataPosition += len; 917 if (o->info.dataPosition > o->info.dataSize) 918 o->info.dataSize = o->info.dataPosition; 919 920 exit: 921 return res; 922 } 923 924 TEE_Result syscall_storage_obj_trunc(unsigned long obj, size_t len) 925 { 926 TEE_Result res; 927 struct tee_ta_session *sess; 928 struct tee_obj *o; 929 size_t off; 930 size_t attr_size; 931 932 res = tee_ta_get_current_session(&sess); 933 if (res != TEE_SUCCESS) 934 goto exit; 935 936 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 937 tee_svc_uref_to_vaddr(obj), &o); 938 if (res != TEE_SUCCESS) 939 goto exit; 940 941 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 942 res = TEE_ERROR_BAD_STATE; 943 goto exit; 944 } 945 946 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_WRITE)) { 947 res = TEE_ERROR_ACCESS_CONFLICT; 948 goto exit; 949 } 950 951 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 952 if (res != TEE_SUCCESS) 953 goto exit; 954 955 if (ADD_OVERFLOW(sizeof(struct tee_svc_storage_head), attr_size, 956 &off)) { 957 res = TEE_ERROR_OVERFLOW; 958 goto exit; 959 } 960 if (ADD_OVERFLOW(len, off, &off)) { 961 res = TEE_ERROR_OVERFLOW; 962 goto exit; 963 } 964 res = o->pobj->fops->truncate(o->fh, off); 965 switch (res) { 966 case TEE_SUCCESS: 967 o->info.dataSize = len; 968 break; 969 case TEE_ERROR_CORRUPT_OBJECT: 970 EMSG("Object corruption"); 971 (void)tee_svc_storage_remove_corrupt_obj(sess, o); 972 break; 973 default: 974 res = TEE_ERROR_GENERIC; 975 break; 976 } 977 978 exit: 979 return res; 980 } 981 982 TEE_Result syscall_storage_obj_seek(unsigned long obj, int32_t offset, 983 unsigned long whence) 984 { 985 TEE_Result res; 986 struct tee_ta_session *sess; 987 struct tee_obj *o; 988 tee_fs_off_t new_pos; 989 990 res = tee_ta_get_current_session(&sess); 991 if (res != TEE_SUCCESS) 992 return res; 993 994 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 995 tee_svc_uref_to_vaddr(obj), &o); 996 if (res != TEE_SUCCESS) 997 return res; 998 999 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) 1000 return TEE_ERROR_BAD_STATE; 1001 1002 switch (whence) { 1003 case TEE_DATA_SEEK_SET: 1004 new_pos = offset; 1005 break; 1006 case TEE_DATA_SEEK_CUR: 1007 if (ADD_OVERFLOW(o->info.dataPosition, offset, &new_pos)) 1008 return TEE_ERROR_OVERFLOW; 1009 break; 1010 case TEE_DATA_SEEK_END: 1011 if (ADD_OVERFLOW(o->info.dataSize, offset, &new_pos)) 1012 return TEE_ERROR_OVERFLOW; 1013 break; 1014 default: 1015 return TEE_ERROR_BAD_PARAMETERS; 1016 } 1017 1018 if (new_pos < 0) 1019 new_pos = 0; 1020 1021 if (new_pos > TEE_DATA_MAX_POSITION) { 1022 EMSG("Position is beyond TEE_DATA_MAX_POSITION"); 1023 return TEE_ERROR_BAD_PARAMETERS; 1024 } 1025 1026 o->info.dataPosition = new_pos; 1027 1028 return TEE_SUCCESS; 1029 } 1030 1031 void tee_svc_storage_close_all_enum(struct user_ta_ctx *utc) 1032 { 1033 struct tee_storage_enum_head *eh = &utc->storage_enums; 1034 1035 /* disregard return value */ 1036 while (!TAILQ_EMPTY(eh)) 1037 tee_svc_close_enum(utc, TAILQ_FIRST(eh)); 1038 } 1039