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 <tee/tee_obj.h> 29 30 #include <stdlib.h> 31 #include <tee_api_defines.h> 32 #include <mm/tee_mmu.h> 33 #include <tee/tee_fs.h> 34 #include <tee/tee_fs_defs.h> 35 #include <tee/tee_pobj.h> 36 #include <trace.h> 37 #include <tee/tee_svc_storage.h> 38 #include <tee/tee_svc_cryp.h> 39 40 void tee_obj_add(struct user_ta_ctx *utc, struct tee_obj *o) 41 { 42 TAILQ_INSERT_TAIL(&utc->objects, o, link); 43 } 44 45 TEE_Result tee_obj_get(struct user_ta_ctx *utc, uint32_t obj_id, 46 struct tee_obj **obj) 47 { 48 struct tee_obj *o; 49 50 TAILQ_FOREACH(o, &utc->objects, link) { 51 if (obj_id == (vaddr_t)o) { 52 *obj = o; 53 return TEE_SUCCESS; 54 } 55 } 56 return TEE_ERROR_BAD_PARAMETERS; 57 } 58 59 void tee_obj_close(struct user_ta_ctx *utc, struct tee_obj *o) 60 { 61 TAILQ_REMOVE(&utc->objects, o, link); 62 63 if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 64 if (o->fd >= 0) 65 o->pobj->fops->close(o->fd); 66 tee_pobj_release(o->pobj); 67 } 68 69 tee_obj_free(o); 70 } 71 72 void tee_obj_close_all(struct user_ta_ctx *utc) 73 { 74 struct tee_obj_head *objects = &utc->objects; 75 76 while (!TAILQ_EMPTY(objects)) 77 tee_obj_close(utc, TAILQ_FIRST(objects)); 78 } 79 80 TEE_Result tee_obj_verify(struct tee_ta_session *sess, struct tee_obj *o) 81 { 82 TEE_Result res; 83 char *file = NULL; 84 char *dir = NULL; 85 int fd = -1; 86 int err = -1; 87 const struct tee_file_operations *fops = o->pobj->fops; 88 89 if (!fops) 90 return TEE_ERROR_STORAGE_NOT_AVAILABLE; 91 92 file = tee_svc_storage_create_filename(sess, 93 o->pobj->obj_id, 94 o->pobj->obj_id_len, 95 false); 96 if (file == NULL) { 97 res = TEE_ERROR_OUT_OF_MEMORY; 98 goto exit; 99 } 100 101 err = fops->access(file, TEE_FS_F_OK); 102 if (err) { 103 /* file not found */ 104 res = TEE_ERROR_ITEM_NOT_FOUND; 105 goto err; 106 } 107 108 fd = fops->open(&res, file, TEE_FS_O_RDONLY); 109 if (fd < 0) { 110 if (res == TEE_ERROR_CORRUPT_OBJECT) { 111 EMSG("Object corrupt\n"); 112 tee_obj_close(to_user_ta_ctx(sess->ctx), o); 113 fops->unlink(file); 114 dir = tee_svc_storage_create_dirname(sess); 115 if (dir != NULL) { 116 fops->rmdir(dir); 117 free(dir); 118 } 119 } 120 goto err; 121 } 122 123 res = TEE_SUCCESS; 124 125 err: 126 free(file); 127 if (fd >= 0) 128 fops->close(fd); 129 exit: 130 return res; 131 } 132 133 struct tee_obj *tee_obj_alloc(void) 134 { 135 struct tee_obj *o = calloc(1, sizeof(struct tee_obj)); 136 137 if (o) 138 o->fd = -1; 139 return o; 140 } 141 142 void tee_obj_free(struct tee_obj *o) 143 { 144 if (o) { 145 tee_obj_attr_free(o); 146 free(o->attr); 147 free(o); 148 } 149 } 150