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 28 #include <kernel/mutex.h> 29 #include <kernel/tee_misc.h> 30 #include <kernel/tee_ta_manager.h> 31 #include <mm/tee_mmu.h> 32 #include <string.h> 33 #include <tee_api_defines_extensions.h> 34 #include <tee_api_defines.h> 35 #include <tee/tee_fs_defs.h> 36 #include <tee/tee_fs.h> 37 #include <tee/tee_obj.h> 38 #include <tee/tee_pobj.h> 39 #include <tee/tee_svc_cryp.h> 40 #include <tee/tee_svc.h> 41 #include <tee/tee_svc_storage.h> 42 #include <trace.h> 43 44 /* 45 * Returns the appropriate tee_file_operations for the specified storage ID. 46 * The value TEE_STORAGE_PRIVATE will select the REE FS if available, otherwise 47 * RPMB. 48 */ 49 static const struct tee_file_operations *file_ops(uint32_t storage_id) 50 { 51 52 switch (storage_id) { 53 case TEE_STORAGE_PRIVATE: 54 #if defined(CFG_REE_FS) 55 return &ree_fs_ops; 56 #elif defined(CFG_RPMB_FS) 57 return &rpmb_fs_ops; 58 #elif defined(CFG_SQL_FS) 59 return &sql_fs_ops; 60 #else 61 #error At least one filesystem must be enabled. 62 #endif 63 #ifdef CFG_REE_FS 64 case TEE_STORAGE_PRIVATE_REE: 65 return &ree_fs_ops; 66 #endif 67 #ifdef CFG_RPMB_FS 68 case TEE_STORAGE_PRIVATE_RPMB: 69 return &rpmb_fs_ops; 70 #endif 71 #ifdef CFG_SQL_FS 72 case TEE_STORAGE_PRIVATE_SQL: 73 return &sql_fs_ops; 74 #endif 75 default: 76 return NULL; 77 } 78 } 79 80 /* SSF (Secure Storage File version 00 */ 81 #define TEE_SVC_STORAGE_MAGIC 0x53534600; 82 83 /* Header of GP formated secure storage files */ 84 struct tee_svc_storage_head { 85 uint32_t magic; 86 uint32_t head_size; 87 uint32_t meta_size; 88 uint32_t ds_size; 89 uint32_t keySize; 90 uint32_t maxKeySize; 91 uint32_t objectUsage; 92 uint32_t objectType; 93 uint32_t have_attrs; 94 }; 95 96 struct tee_storage_enum { 97 TAILQ_ENTRY(tee_storage_enum) link; 98 struct tee_fs_dir *dir; 99 const struct tee_file_operations *fops; 100 }; 101 102 /* 103 * Protect TA storage directory: avoid race conditions between (create 104 * directory + create file) and (remove directory) 105 */ 106 static struct mutex ta_dir_mutex = MUTEX_INITIALIZER; 107 108 static TEE_Result tee_svc_storage_get_enum(struct user_ta_ctx *utc, 109 uint32_t enum_id, 110 struct tee_storage_enum **e_out) 111 { 112 struct tee_storage_enum *e; 113 114 TAILQ_FOREACH(e, &utc->storage_enums, link) { 115 if (enum_id == (vaddr_t)e) { 116 *e_out = e; 117 return TEE_SUCCESS; 118 } 119 } 120 return TEE_ERROR_BAD_PARAMETERS; 121 } 122 123 static TEE_Result tee_svc_close_enum(struct user_ta_ctx *utc, 124 struct tee_storage_enum *e) 125 { 126 if (e == NULL || utc == NULL) 127 return TEE_ERROR_BAD_PARAMETERS; 128 129 TAILQ_REMOVE(&utc->storage_enums, e, link); 130 131 if (!e->fops) 132 return TEE_ERROR_ITEM_NOT_FOUND; 133 134 e->fops->closedir(e->dir); 135 e->dir = NULL; 136 e->fops = NULL; 137 138 free(e); 139 140 return TEE_SUCCESS; 141 } 142 143 /* "/TA_uuid/object_id" or "/TA_uuid/.object_id" */ 144 char *tee_svc_storage_create_filename(struct tee_ta_session *sess, 145 void *object_id, 146 uint32_t object_id_len, 147 bool transient) 148 { 149 uint8_t *file; 150 uint32_t pos = 0; 151 uint32_t hslen = 1 /* Leading slash */ 152 + TEE_B2HS_HSBUF_SIZE(sizeof(TEE_UUID) + object_id_len) 153 + 1; /* Intermediate slash */ 154 155 /* +1 for the '.' (temporary persistent object) */ 156 if (transient) 157 hslen++; 158 159 file = malloc(hslen); 160 if (!file) 161 return NULL; 162 163 file[pos++] = '/'; 164 pos += tee_b2hs((uint8_t *)&sess->ctx->uuid, &file[pos], 165 sizeof(TEE_UUID), hslen); 166 file[pos++] = '/'; 167 168 if (transient) 169 file[pos++] = '.'; 170 171 tee_b2hs(object_id, file + pos, object_id_len, hslen - pos); 172 173 return (char *)file; 174 } 175 176 /* "/TA_uuid" */ 177 char *tee_svc_storage_create_dirname(struct tee_ta_session *sess) 178 { 179 uint8_t *dir; 180 uint32_t hslen = TEE_B2HS_HSBUF_SIZE(sizeof(TEE_UUID)) + 1; 181 182 dir = malloc(hslen); 183 if (!dir) 184 return NULL; 185 186 dir[0] = '/'; 187 tee_b2hs((uint8_t *)&sess->ctx->uuid, dir + 1, sizeof(TEE_UUID), 188 hslen); 189 190 return (char *)dir; 191 } 192 193 static TEE_Result tee_svc_storage_remove_corrupt_obj( 194 struct tee_ta_session *sess, 195 struct tee_obj *o) 196 { 197 TEE_Result res; 198 char *file = NULL; 199 const struct tee_file_operations *fops = o->pobj->fops; 200 201 file = tee_svc_storage_create_filename(sess, 202 o->pobj->obj_id, 203 o->pobj->obj_id_len, 204 false); 205 if (file == NULL) { 206 res = TEE_ERROR_OUT_OF_MEMORY; 207 goto exit; 208 } 209 210 tee_obj_close(to_user_ta_ctx(sess->ctx), o); 211 fops->remove(file); 212 free(file); 213 214 res = TEE_SUCCESS; 215 216 exit: 217 return res; 218 } 219 220 static TEE_Result tee_svc_storage_create_file(struct tee_ta_session *sess, 221 char *file, 222 const struct tee_file_operations *fops, 223 struct tee_file_handle **fh) 224 { 225 TEE_Result res = TEE_SUCCESS; 226 char *dir = NULL; 227 228 assert(!*fh); 229 dir = tee_svc_storage_create_dirname(sess); 230 if (dir == NULL) { 231 res = TEE_ERROR_OUT_OF_MEMORY; 232 goto exit; 233 } 234 235 mutex_lock(&ta_dir_mutex); 236 237 res = fops->create(file, true /* currently always overwrite */, fh); 238 239 mutex_unlock(&ta_dir_mutex); 240 exit: 241 free(dir); 242 243 return res; 244 } 245 246 static TEE_Result tee_svc_storage_read_head(struct tee_ta_session *sess, 247 struct tee_obj *o) 248 { 249 TEE_Result res = TEE_SUCCESS; 250 size_t bytes; 251 struct tee_svc_storage_head head; 252 char *file = NULL; 253 const struct tee_file_operations *fops; 254 void *attr = NULL; 255 256 if (o == NULL || o->pobj == NULL) 257 return TEE_ERROR_BAD_PARAMETERS; 258 259 fops = o->pobj->fops; 260 261 file = tee_svc_storage_create_filename(sess, 262 o->pobj->obj_id, 263 o->pobj->obj_id_len, 264 false); 265 if (file == NULL) { 266 res = TEE_ERROR_OUT_OF_MEMORY; 267 goto exit; 268 } 269 270 if (fops->access(file, TEE_FS_F_OK)) { 271 /* file not found */ 272 res = TEE_ERROR_ITEM_NOT_FOUND; 273 goto exit; 274 } 275 276 assert(!o->fh); 277 res = fops->open(file, &o->fh); 278 if (res != TEE_SUCCESS) 279 goto exit; 280 281 /* read head */ 282 bytes = sizeof(struct tee_svc_storage_head); 283 res = fops->read(o->fh, &head, &bytes); 284 if (res != TEE_SUCCESS) { 285 if (res == TEE_ERROR_CORRUPT_OBJECT) 286 EMSG("Head corrupt\n"); 287 goto exit; 288 } 289 290 if (bytes != sizeof(struct tee_svc_storage_head)) { 291 res = TEE_ERROR_BAD_FORMAT; 292 goto exit; 293 } 294 295 res = tee_obj_set_type(o, head.objectType, head.maxKeySize); 296 if (res != TEE_SUCCESS) 297 goto exit; 298 299 if (head.meta_size) { 300 attr = malloc(head.meta_size); 301 if (!attr) { 302 res = TEE_ERROR_OUT_OF_MEMORY; 303 goto exit; 304 } 305 306 /* read meta */ 307 bytes = head.meta_size; 308 res = fops->read(o->fh, attr, &bytes); 309 if (res != TEE_SUCCESS || bytes != head.meta_size) { 310 res = TEE_ERROR_CORRUPT_OBJECT; 311 goto exit; 312 } 313 } 314 315 res = tee_obj_attr_from_binary(o, attr, head.meta_size); 316 if (res != TEE_SUCCESS) 317 goto exit; 318 319 o->info.dataSize = head.ds_size; 320 o->info.keySize = head.keySize; 321 o->info.objectUsage = head.objectUsage; 322 o->info.objectType = head.objectType; 323 o->have_attrs = head.have_attrs; 324 325 exit: 326 free(attr); 327 free(file); 328 329 return res; 330 } 331 332 333 static TEE_Result tee_svc_storage_init_file(struct tee_ta_session *sess, 334 struct tee_obj *o, 335 struct tee_obj *attr_o, void *data, 336 uint32_t len) 337 { 338 TEE_Result res = TEE_SUCCESS; 339 struct tee_svc_storage_head head; 340 char *tmpfile = NULL; 341 const struct tee_file_operations *fops; 342 void *attr = NULL; 343 size_t attr_size = 0; 344 345 if (o == NULL || o->pobj == NULL) 346 return TEE_ERROR_BAD_PARAMETERS; 347 348 fops = o->pobj->fops; 349 350 /* create temporary persistent object filename */ 351 tmpfile = tee_svc_storage_create_filename(sess, 352 o->pobj->obj_id, 353 o->pobj->obj_id_len, 354 true); 355 356 if (tmpfile == NULL) { 357 res = TEE_ERROR_OUT_OF_MEMORY; 358 goto exit; 359 } 360 361 res = tee_svc_storage_create_file(sess, tmpfile, fops, &o->fh); 362 if (res != TEE_SUCCESS) 363 goto exit; 364 365 if (attr_o) { 366 res = tee_obj_set_type(o, attr_o->info.objectType, 367 attr_o->info.maxKeySize); 368 if (res != TEE_SUCCESS) 369 goto exit; 370 res = tee_obj_attr_copy_from(o, attr_o); 371 if (res != TEE_SUCCESS) 372 goto exit; 373 o->have_attrs = attr_o->have_attrs; 374 o->info.objectUsage = attr_o->info.objectUsage; 375 o->info.keySize = attr_o->info.keySize; 376 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 377 if (res != TEE_SUCCESS) 378 goto exit; 379 if (attr_size) { 380 attr = malloc(attr_size); 381 if (!attr) { 382 res = TEE_ERROR_OUT_OF_MEMORY; 383 goto exit; 384 } 385 res = tee_obj_attr_to_binary(o, attr, &attr_size); 386 if (res != TEE_SUCCESS) 387 goto exit; 388 } 389 } else { 390 res = tee_obj_set_type(o, TEE_TYPE_DATA, 0); 391 if (res != TEE_SUCCESS) 392 goto exit; 393 } 394 395 /* write head */ 396 head.magic = TEE_SVC_STORAGE_MAGIC; 397 head.head_size = sizeof(struct tee_svc_storage_head); 398 head.meta_size = attr_size; 399 head.ds_size = len; 400 head.keySize = o->info.keySize; 401 head.maxKeySize = o->info.maxKeySize; 402 head.objectUsage = o->info.objectUsage; 403 head.objectType = o->info.objectType; 404 head.have_attrs = o->have_attrs; 405 406 /* write head */ 407 res = fops->write(o->fh, &head, sizeof(struct tee_svc_storage_head)); 408 if (res != TEE_SUCCESS) 409 goto exit; 410 411 /* write meta */ 412 res = fops->write(o->fh, attr, attr_size); 413 if (res != TEE_SUCCESS) 414 goto exit; 415 416 /* write init data */ 417 o->info.dataSize = len; 418 419 /* write data to fs if needed */ 420 if (data && len) 421 res = fops->write(o->fh, data, len); 422 423 exit: 424 free(attr); 425 free(tmpfile); 426 fops->close(&o->fh); 427 428 return res; 429 } 430 431 TEE_Result syscall_storage_obj_open(unsigned long storage_id, void *object_id, 432 size_t object_id_len, unsigned long flags, 433 uint32_t *obj) 434 { 435 TEE_Result res; 436 struct tee_ta_session *sess; 437 struct tee_obj *o = NULL; 438 char *file = NULL; 439 struct tee_pobj *po = NULL; 440 struct user_ta_ctx *utc; 441 const struct tee_file_operations *fops = file_ops(storage_id); 442 size_t attr_size; 443 444 if (!fops) { 445 res = TEE_ERROR_ITEM_NOT_FOUND; 446 goto exit; 447 } 448 449 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) { 450 res = TEE_ERROR_BAD_PARAMETERS; 451 goto exit; 452 } 453 454 res = tee_ta_get_current_session(&sess); 455 if (res != TEE_SUCCESS) 456 goto err; 457 utc = to_user_ta_ctx(sess->ctx); 458 459 res = tee_mmu_check_access_rights(utc, 460 TEE_MEMORY_ACCESS_READ | 461 TEE_MEMORY_ACCESS_ANY_OWNER, 462 (uaddr_t) object_id, 463 object_id_len); 464 if (res != TEE_SUCCESS) 465 goto err; 466 467 res = tee_pobj_get((void *)&sess->ctx->uuid, object_id, 468 object_id_len, flags, fops, &po); 469 if (res != TEE_SUCCESS) 470 goto err; 471 472 o = tee_obj_alloc(); 473 if (o == NULL) { 474 tee_pobj_release(po); 475 res = TEE_ERROR_OUT_OF_MEMORY; 476 goto err; 477 } 478 479 o->info.handleFlags = 480 TEE_HANDLE_FLAG_PERSISTENT | TEE_HANDLE_FLAG_INITIALIZED; 481 o->flags = flags; 482 o->pobj = po; 483 tee_obj_add(utc, o); 484 485 res = tee_svc_storage_read_head(sess, o); 486 if (res != TEE_SUCCESS) { 487 if (res == TEE_ERROR_CORRUPT_OBJECT) { 488 EMSG("Object corrupt"); 489 goto err; 490 } 491 goto oclose; 492 } 493 494 res = tee_svc_copy_kaddr_to_uref(obj, o); 495 if (res != TEE_SUCCESS) 496 goto oclose; 497 498 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 499 if (res != TEE_SUCCESS) 500 goto oclose; 501 502 res = fops->seek(o->fh, sizeof(struct tee_svc_storage_head) + attr_size, 503 TEE_DATA_SEEK_SET, NULL); 504 if (res != TEE_SUCCESS) 505 goto err; 506 507 goto exit; 508 509 oclose: 510 tee_obj_close(utc, o); 511 o = NULL; 512 513 err: 514 if (res == TEE_ERROR_NO_DATA || res == TEE_ERROR_BAD_FORMAT) 515 res = TEE_ERROR_CORRUPT_OBJECT; 516 if (res == TEE_ERROR_CORRUPT_OBJECT && o) 517 tee_svc_storage_remove_corrupt_obj(sess, o); 518 519 exit: 520 free(file); 521 file = NULL; 522 return res; 523 } 524 525 TEE_Result syscall_storage_obj_create(unsigned long storage_id, void *object_id, 526 size_t object_id_len, unsigned long flags, 527 unsigned long attr, void *data, size_t len, 528 uint32_t *obj) 529 { 530 TEE_Result res; 531 struct tee_ta_session *sess; 532 struct tee_obj *o = NULL; 533 struct tee_obj *attr_o = NULL; 534 char *file = NULL; 535 struct tee_pobj *po = NULL; 536 char *tmpfile = NULL; 537 struct user_ta_ctx *utc; 538 const struct tee_file_operations *fops = file_ops(storage_id); 539 size_t attr_size; 540 541 if (!fops) 542 return TEE_ERROR_ITEM_NOT_FOUND; 543 544 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) 545 return TEE_ERROR_BAD_PARAMETERS; 546 547 res = tee_ta_get_current_session(&sess); 548 if (res != TEE_SUCCESS) 549 return res; 550 utc = to_user_ta_ctx(sess->ctx); 551 552 res = tee_mmu_check_access_rights(utc, 553 TEE_MEMORY_ACCESS_READ | 554 TEE_MEMORY_ACCESS_ANY_OWNER, 555 (uaddr_t) object_id, 556 object_id_len); 557 if (res != TEE_SUCCESS) 558 goto err; 559 560 res = tee_pobj_get((void *)&sess->ctx->uuid, object_id, 561 object_id_len, flags, fops, &po); 562 if (res != TEE_SUCCESS) 563 goto err; 564 565 /* check rights of the provided buffer */ 566 if (data && len) { 567 res = tee_mmu_check_access_rights(utc, 568 TEE_MEMORY_ACCESS_READ | 569 TEE_MEMORY_ACCESS_ANY_OWNER, 570 (uaddr_t) data, len); 571 572 if (res != TEE_SUCCESS) 573 goto err; 574 } 575 576 o = tee_obj_alloc(); 577 if (o == NULL) { 578 res = TEE_ERROR_OUT_OF_MEMORY; 579 goto err; 580 } 581 582 o->info.handleFlags = 583 TEE_HANDLE_FLAG_PERSISTENT | TEE_HANDLE_FLAG_INITIALIZED; 584 o->flags = flags; 585 o->pobj = po; 586 587 if (attr != TEE_HANDLE_NULL) { 588 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(attr), 589 &attr_o); 590 if (res != TEE_SUCCESS) 591 goto err; 592 } 593 594 res = tee_svc_storage_init_file(sess, o, attr_o, data, len); 595 if (res != TEE_SUCCESS) 596 goto err; 597 598 /* create persistent object filename */ 599 file = tee_svc_storage_create_filename(sess, object_id, 600 object_id_len, false); 601 if (file == NULL) { 602 res = TEE_ERROR_OUT_OF_MEMORY; 603 goto err; 604 } 605 606 /* create temporary persistent object filename */ 607 tmpfile = tee_svc_storage_create_filename(sess, object_id, 608 object_id_len, 609 true); 610 if (tmpfile == NULL) { 611 res = TEE_ERROR_OUT_OF_MEMORY; 612 goto err; 613 } 614 615 /* rename temporary persistent object filename */ 616 res = fops->rename(tmpfile, file, !!(flags & TEE_DATA_FLAG_OVERWRITE)); 617 if (res != TEE_SUCCESS) 618 goto rmfile; 619 620 res = fops->open(file, &o->fh); 621 if (res != TEE_SUCCESS) 622 goto err; 623 624 tee_obj_add(utc, o); 625 626 res = tee_svc_copy_kaddr_to_uref(obj, o); 627 if (res != TEE_SUCCESS) 628 goto oclose; 629 630 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 631 if (res != TEE_SUCCESS) 632 goto oclose; 633 634 res = fops->seek(o->fh, sizeof(struct tee_svc_storage_head) + attr_size, 635 TEE_DATA_SEEK_SET, NULL); 636 if (res != TEE_SUCCESS) 637 goto oclose; 638 639 goto exit; 640 641 oclose: 642 tee_obj_close(utc, o); 643 goto exit; 644 645 rmfile: 646 fops->remove(tmpfile); 647 648 err: 649 if (res == TEE_ERROR_NO_DATA || res == TEE_ERROR_BAD_FORMAT) 650 res = TEE_ERROR_CORRUPT_OBJECT; 651 if (res == TEE_ERROR_CORRUPT_OBJECT && file) 652 fops->remove(file); 653 if (o) 654 fops->close(&o->fh); 655 if (po) 656 tee_pobj_release(po); 657 free(o); 658 659 exit: 660 free(file); 661 free(tmpfile); 662 663 return res; 664 } 665 666 TEE_Result syscall_storage_obj_del(unsigned long obj) 667 { 668 TEE_Result res; 669 struct tee_ta_session *sess; 670 struct tee_obj *o; 671 int err; 672 char *file; 673 struct user_ta_ctx *utc; 674 const struct tee_file_operations *fops; 675 676 res = tee_ta_get_current_session(&sess); 677 if (res != TEE_SUCCESS) 678 return res; 679 utc = to_user_ta_ctx(sess->ctx); 680 681 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(obj), &o); 682 if (res != TEE_SUCCESS) 683 return res; 684 685 if (!(o->flags & TEE_DATA_FLAG_ACCESS_WRITE_META)) 686 return TEE_ERROR_ACCESS_CONFLICT; 687 688 if (o->pobj == NULL || o->pobj->obj_id == NULL) 689 return TEE_ERROR_BAD_STATE; 690 691 file = tee_svc_storage_create_filename(sess, o->pobj->obj_id, 692 o->pobj->obj_id_len, false); 693 if (file == NULL) 694 return TEE_ERROR_OUT_OF_MEMORY; 695 696 fops = o->pobj->fops; 697 tee_obj_close(utc, o); 698 699 err = fops->access(file, TEE_FS_F_OK); 700 if (err) 701 /* file not found */ 702 return TEE_ERROR_STORAGE_NOT_AVAILABLE; 703 704 res = fops->remove(file); 705 free(file); 706 if (res != TEE_SUCCESS) 707 return res; 708 709 return TEE_SUCCESS; 710 } 711 712 TEE_Result syscall_storage_obj_rename(unsigned long obj, void *object_id, 713 size_t object_id_len) 714 { 715 TEE_Result res; 716 struct tee_ta_session *sess; 717 struct tee_obj *o; 718 struct tee_pobj *po = NULL; 719 char *new_file = NULL; 720 char *old_file = NULL; 721 struct user_ta_ctx *utc; 722 const struct tee_file_operations *fops; 723 724 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) 725 return TEE_ERROR_BAD_PARAMETERS; 726 727 res = tee_ta_get_current_session(&sess); 728 if (res != TEE_SUCCESS) 729 return res; 730 utc = to_user_ta_ctx(sess->ctx); 731 732 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(obj), &o); 733 if (res != TEE_SUCCESS) 734 return res; 735 736 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 737 res = TEE_ERROR_BAD_STATE; 738 goto exit; 739 } 740 741 if (!(o->flags & TEE_DATA_FLAG_ACCESS_WRITE_META)) { 742 res = TEE_ERROR_BAD_STATE; 743 goto exit; 744 } 745 746 if (o->pobj == NULL || o->pobj->obj_id == NULL) { 747 res = TEE_ERROR_BAD_STATE; 748 goto exit; 749 } 750 751 res = tee_mmu_check_access_rights(utc, 752 TEE_MEMORY_ACCESS_READ | 753 TEE_MEMORY_ACCESS_ANY_OWNER, 754 (uaddr_t) object_id, object_id_len); 755 if (res != TEE_SUCCESS) 756 goto exit; 757 758 /* get new ds name */ 759 new_file = tee_svc_storage_create_filename(sess, object_id, 760 object_id_len, false); 761 if (new_file == NULL) { 762 res = TEE_ERROR_OUT_OF_MEMORY; 763 goto exit; 764 } 765 766 old_file = tee_svc_storage_create_filename(sess, o->pobj->obj_id, 767 o->pobj->obj_id_len, false); 768 if (old_file == NULL) { 769 res = TEE_ERROR_OUT_OF_MEMORY; 770 goto exit; 771 } 772 773 /* reserve dest name */ 774 fops = o->pobj->fops; 775 res = tee_pobj_get((void *)&sess->ctx->uuid, object_id, 776 object_id_len, TEE_DATA_FLAG_ACCESS_WRITE_META, 777 fops, &po); 778 if (res != TEE_SUCCESS) 779 goto exit; 780 781 /* move */ 782 res = fops->rename(old_file, new_file, false /* no overwrite */); 783 if (res == TEE_ERROR_GENERIC) 784 goto exit; 785 786 res = tee_pobj_rename(o->pobj, object_id, object_id_len); 787 788 exit: 789 tee_pobj_release(po); 790 791 free(new_file); 792 free(old_file); 793 794 return res; 795 } 796 797 TEE_Result syscall_storage_alloc_enum(uint32_t *obj_enum) 798 { 799 struct tee_storage_enum *e; 800 struct tee_ta_session *sess; 801 TEE_Result res; 802 struct user_ta_ctx *utc; 803 804 if (obj_enum == NULL) 805 return TEE_ERROR_BAD_PARAMETERS; 806 807 res = tee_ta_get_current_session(&sess); 808 if (res != TEE_SUCCESS) 809 return res; 810 utc = to_user_ta_ctx(sess->ctx); 811 812 e = malloc(sizeof(struct tee_storage_enum)); 813 if (e == NULL) 814 return TEE_ERROR_OUT_OF_MEMORY; 815 816 e->dir = NULL; 817 e->fops = NULL; 818 TAILQ_INSERT_TAIL(&utc->storage_enums, e, link); 819 820 return tee_svc_copy_kaddr_to_uref(obj_enum, e); 821 } 822 823 TEE_Result syscall_storage_free_enum(unsigned long obj_enum) 824 { 825 struct tee_storage_enum *e; 826 TEE_Result res; 827 struct tee_ta_session *sess; 828 struct user_ta_ctx *utc; 829 830 res = tee_ta_get_current_session(&sess); 831 if (res != TEE_SUCCESS) 832 return res; 833 utc = to_user_ta_ctx(sess->ctx); 834 835 res = tee_svc_storage_get_enum(utc, 836 tee_svc_uref_to_vaddr(obj_enum), &e); 837 if (res != TEE_SUCCESS) 838 return res; 839 840 return tee_svc_close_enum(utc, e); 841 } 842 843 TEE_Result syscall_storage_reset_enum(unsigned long obj_enum) 844 { 845 struct tee_storage_enum *e; 846 TEE_Result res; 847 struct tee_ta_session *sess; 848 849 res = tee_ta_get_current_session(&sess); 850 if (res != TEE_SUCCESS) 851 return res; 852 853 res = tee_svc_storage_get_enum(to_user_ta_ctx(sess->ctx), 854 tee_svc_uref_to_vaddr(obj_enum), &e); 855 if (res != TEE_SUCCESS) 856 return res; 857 858 e->fops->closedir(e->dir); 859 e->dir = NULL; 860 861 return TEE_SUCCESS; 862 } 863 864 static TEE_Result tee_svc_storage_set_enum(char *d_name, 865 const struct tee_file_operations *fops, 866 struct tee_obj *o) 867 { 868 TEE_Result res; 869 uint32_t blen; 870 uint32_t hslen; 871 872 o->info.handleFlags = 873 TEE_HANDLE_FLAG_PERSISTENT | TEE_HANDLE_FLAG_INITIALIZED; 874 o->info.objectUsage = TEE_USAGE_DEFAULT; 875 876 hslen = strlen(d_name); 877 blen = TEE_HS2B_BBUF_SIZE(hslen); 878 o->pobj->obj_id = malloc(blen); 879 if (!o->pobj->obj_id) { 880 res = TEE_ERROR_OUT_OF_MEMORY; 881 goto exit; 882 } 883 tee_hs2b((uint8_t *)d_name, o->pobj->obj_id, hslen, blen); 884 o->pobj->obj_id_len = blen; 885 o->pobj->fops = fops; 886 887 res = TEE_SUCCESS; 888 889 exit: 890 return res; 891 892 } 893 894 TEE_Result syscall_storage_start_enum(unsigned long obj_enum, 895 unsigned long storage_id) 896 { 897 struct tee_storage_enum *e; 898 char *dir; 899 TEE_Result res; 900 struct tee_ta_session *sess; 901 const struct tee_file_operations *fops = file_ops(storage_id); 902 903 res = tee_ta_get_current_session(&sess); 904 if (res != TEE_SUCCESS) 905 return res; 906 907 res = tee_svc_storage_get_enum(to_user_ta_ctx(sess->ctx), 908 tee_svc_uref_to_vaddr(obj_enum), &e); 909 if (res != TEE_SUCCESS) 910 return res; 911 912 if (!fops) 913 return TEE_ERROR_ITEM_NOT_FOUND; 914 915 e->fops = fops; 916 dir = tee_svc_storage_create_dirname(sess); 917 if (dir == NULL) { 918 res = TEE_ERROR_OUT_OF_MEMORY; 919 goto exit; 920 } 921 922 assert(!e->dir); 923 res = fops->opendir(dir, &e->dir); 924 free(dir); 925 exit: 926 return res; 927 } 928 929 TEE_Result syscall_storage_next_enum(unsigned long obj_enum, 930 TEE_ObjectInfo *info, void *obj_id, uint64_t *len) 931 { 932 struct tee_storage_enum *e; 933 struct tee_fs_dirent *d; 934 TEE_Result res = TEE_SUCCESS; 935 struct tee_ta_session *sess; 936 struct tee_obj *o = NULL; 937 uint64_t l; 938 struct user_ta_ctx *utc; 939 940 res = tee_ta_get_current_session(&sess); 941 if (res != TEE_SUCCESS) 942 goto exit; 943 utc = to_user_ta_ctx(sess->ctx); 944 945 res = tee_svc_storage_get_enum(utc, 946 tee_svc_uref_to_vaddr(obj_enum), &e); 947 if (res != TEE_SUCCESS) 948 goto exit; 949 950 /* check rights of the provided buffers */ 951 res = tee_mmu_check_access_rights(utc, 952 TEE_MEMORY_ACCESS_WRITE | 953 TEE_MEMORY_ACCESS_ANY_OWNER, 954 (uaddr_t) info, 955 sizeof(TEE_ObjectInfo)); 956 if (res != TEE_SUCCESS) 957 goto exit; 958 959 res = tee_mmu_check_access_rights(utc, 960 TEE_MEMORY_ACCESS_WRITE | 961 TEE_MEMORY_ACCESS_ANY_OWNER, 962 (uaddr_t) obj_id, 963 TEE_OBJECT_ID_MAX_LEN); 964 if (res != TEE_SUCCESS) 965 goto exit; 966 967 if (!e->fops) { 968 res = TEE_ERROR_ITEM_NOT_FOUND; 969 goto exit; 970 } 971 972 res = e->fops->readdir(e->dir, &d); 973 if (res != TEE_SUCCESS) 974 goto exit; 975 976 o = tee_obj_alloc(); 977 if (o == NULL) { 978 res = TEE_ERROR_OUT_OF_MEMORY; 979 goto exit; 980 } 981 o->flags = TEE_DATA_FLAG_SHARE_READ; 982 983 o->pobj = calloc(1, sizeof(struct tee_pobj)); 984 if (!o->pobj) { 985 res = TEE_ERROR_OUT_OF_MEMORY; 986 goto exit; 987 } 988 989 res = tee_svc_storage_set_enum(d->d_name, e->fops, o); 990 if (res != TEE_SUCCESS) 991 goto exit; 992 993 res = tee_svc_storage_read_head(sess, o); 994 if (res != TEE_SUCCESS) 995 goto exit; 996 997 memcpy(info, &o->info, sizeof(TEE_ObjectInfo)); 998 memcpy(obj_id, o->pobj->obj_id, o->pobj->obj_id_len); 999 1000 l = o->pobj->obj_id_len; 1001 res = tee_svc_copy_to_user(len, &l, sizeof(*len)); 1002 1003 exit: 1004 if (o) { 1005 if (o->pobj) { 1006 o->pobj->fops->close(&o->fh); 1007 free(o->pobj->obj_id); 1008 } 1009 free(o->pobj); 1010 tee_obj_free(o); 1011 } 1012 1013 return res; 1014 } 1015 1016 TEE_Result syscall_storage_obj_read(unsigned long obj, void *data, size_t len, 1017 uint64_t *count) 1018 { 1019 TEE_Result res; 1020 struct tee_ta_session *sess; 1021 struct tee_obj *o; 1022 uint64_t u_count; 1023 struct user_ta_ctx *utc; 1024 size_t bytes; 1025 1026 res = tee_ta_get_current_session(&sess); 1027 if (res != TEE_SUCCESS) 1028 goto exit; 1029 utc = to_user_ta_ctx(sess->ctx); 1030 1031 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(obj), &o); 1032 if (res != TEE_SUCCESS) 1033 goto exit; 1034 1035 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 1036 res = TEE_ERROR_BAD_STATE; 1037 goto exit; 1038 } 1039 1040 if (!(o->flags & TEE_DATA_FLAG_ACCESS_READ)) { 1041 res = TEE_ERROR_ACCESS_CONFLICT; 1042 goto exit; 1043 } 1044 1045 /* check rights of the provided buffer */ 1046 res = tee_mmu_check_access_rights(utc, 1047 TEE_MEMORY_ACCESS_WRITE | 1048 TEE_MEMORY_ACCESS_ANY_OWNER, 1049 (uaddr_t) data, len); 1050 if (res != TEE_SUCCESS) 1051 goto exit; 1052 1053 bytes = len; 1054 res = o->pobj->fops->read(o->fh, data, &bytes); 1055 if (res != TEE_SUCCESS) { 1056 EMSG("Error code=%x\n", (uint32_t)res); 1057 if (res == TEE_ERROR_CORRUPT_OBJECT) { 1058 EMSG("Object corrupt\n"); 1059 tee_svc_storage_remove_corrupt_obj(sess, o); 1060 } 1061 goto exit; 1062 } 1063 1064 o->info.dataPosition += bytes; 1065 1066 u_count = bytes; 1067 res = tee_svc_copy_to_user(count, &u_count, sizeof(*count)); 1068 exit: 1069 return res; 1070 } 1071 1072 TEE_Result syscall_storage_obj_write(unsigned long obj, void *data, size_t len) 1073 { 1074 TEE_Result res; 1075 struct tee_ta_session *sess; 1076 struct tee_obj *o; 1077 struct user_ta_ctx *utc; 1078 1079 res = tee_ta_get_current_session(&sess); 1080 if (res != TEE_SUCCESS) 1081 goto exit; 1082 utc = to_user_ta_ctx(sess->ctx); 1083 1084 res = tee_obj_get(utc, tee_svc_uref_to_vaddr(obj), &o); 1085 if (res != TEE_SUCCESS) 1086 goto exit; 1087 1088 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 1089 res = TEE_ERROR_BAD_STATE; 1090 goto exit; 1091 } 1092 1093 if (!(o->flags & TEE_DATA_FLAG_ACCESS_WRITE)) { 1094 res = TEE_ERROR_ACCESS_CONFLICT; 1095 goto exit; 1096 } 1097 1098 /* check rights of the provided buffer */ 1099 res = tee_mmu_check_access_rights(utc, 1100 TEE_MEMORY_ACCESS_READ | 1101 TEE_MEMORY_ACCESS_ANY_OWNER, 1102 (uaddr_t) data, len); 1103 if (res != TEE_SUCCESS) 1104 goto exit; 1105 1106 res = o->pobj->fops->write(o->fh, data, len); 1107 if (res != TEE_SUCCESS) 1108 goto exit; 1109 1110 o->info.dataPosition += len; 1111 if (o->info.dataPosition > o->info.dataSize) 1112 o->info.dataSize = o->info.dataPosition; 1113 1114 exit: 1115 return res; 1116 } 1117 1118 TEE_Result syscall_storage_obj_trunc(unsigned long obj, size_t len) 1119 { 1120 TEE_Result res; 1121 struct tee_ta_session *sess; 1122 struct tee_obj *o; 1123 size_t off; 1124 size_t attr_size; 1125 1126 res = tee_ta_get_current_session(&sess); 1127 if (res != TEE_SUCCESS) 1128 goto exit; 1129 1130 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 1131 tee_svc_uref_to_vaddr(obj), &o); 1132 if (res != TEE_SUCCESS) 1133 goto exit; 1134 1135 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 1136 res = TEE_ERROR_BAD_STATE; 1137 goto exit; 1138 } 1139 1140 if (!(o->flags & TEE_DATA_FLAG_ACCESS_WRITE)) { 1141 res = TEE_ERROR_ACCESS_CONFLICT; 1142 goto exit; 1143 } 1144 1145 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 1146 if (res != TEE_SUCCESS) 1147 goto exit; 1148 1149 off = sizeof(struct tee_svc_storage_head) + attr_size; 1150 res = o->pobj->fops->truncate(o->fh, len + off); 1151 if (res != TEE_SUCCESS) { 1152 if (res == TEE_ERROR_CORRUPT_OBJECT) { 1153 EMSG("Object corrupt\n"); 1154 res = tee_svc_storage_remove_corrupt_obj(sess, o); 1155 if (res != TEE_SUCCESS) 1156 goto exit; 1157 res = TEE_ERROR_CORRUPT_OBJECT; 1158 goto exit; 1159 } else 1160 res = TEE_ERROR_GENERIC; 1161 } 1162 1163 exit: 1164 return res; 1165 } 1166 1167 TEE_Result syscall_storage_obj_seek(unsigned long obj, int32_t offset, 1168 unsigned long whence) 1169 { 1170 TEE_Result res; 1171 struct tee_ta_session *sess; 1172 struct tee_obj *o; 1173 int32_t off; 1174 size_t attr_size; 1175 1176 res = tee_ta_get_current_session(&sess); 1177 if (res != TEE_SUCCESS) 1178 goto exit; 1179 1180 res = tee_obj_get(to_user_ta_ctx(sess->ctx), 1181 tee_svc_uref_to_vaddr(obj), &o); 1182 if (res != TEE_SUCCESS) 1183 goto exit; 1184 1185 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 1186 res = TEE_ERROR_BAD_STATE; 1187 goto exit; 1188 } 1189 1190 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 1191 if (res != TEE_SUCCESS) 1192 goto exit; 1193 1194 off = offset; 1195 if (whence == TEE_DATA_SEEK_SET) 1196 off += sizeof(struct tee_svc_storage_head) + attr_size; 1197 1198 res = o->pobj->fops->seek(o->fh, off, whence, &off); 1199 if (res != TEE_SUCCESS) 1200 goto exit; 1201 o->info.dataPosition = off - (sizeof(struct tee_svc_storage_head) + 1202 attr_size); 1203 1204 exit: 1205 return res; 1206 } 1207 1208 void tee_svc_storage_close_all_enum(struct user_ta_ctx *utc) 1209 { 1210 struct tee_storage_enum_head *eh = &utc->storage_enums; 1211 1212 /* disregard return value */ 1213 while (!TAILQ_EMPTY(eh)) 1214 tee_svc_close_enum(utc, TAILQ_FIRST(eh)); 1215 } 1216