文章目錄

• • • • 1、Storage API 函數的介紹
      • 2、代碼使用示例

1、Storage API 函數的介紹

TEE中關于storage API的函數，如下表所示

TEE_CloseObject:

TEE_TruncateObjectData: (Truncate /tr???ke?t/ 截斷)

• 如果size小于當前size，那么超出的size將會刪除;
• 如果size大于當前size，那么將補0;

2、代碼使用示例

TEE_Result write_raw_object(char *obj_id,size_t obj_id_sz,char *data,size_t data_sz) {TEE_ObjectHandle object;TEE_Result res;EMSG("%s : enter", __func__);EMSG("%s : obj_id=[%s], obj_id_sz=[%d], data_sz=[%d]", __func__, obj_id, obj_id_sz, data_sz);res = TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE, obj_id, obj_id_sz, WRITE_FLAG, TEE_HANDLE_NULL, NULL, 0, &object);if (res != TEE_SUCCESS) {EMSG("TEE_CreatePersistentObject failed 0x%08x", res);return res;}res = TEE_WriteObjectData(object, data, data_sz);if (res != TEE_SUCCESS) {EMSG("TEE_WriteObjectData failed 0x%08x", res);TEE_CloseAndDeletePersistentObject1(object);} else {TEE_CloseObject(object);}EMSG("%s : exit", __func__);return res; }TEE_Result read_raw_object(char *obj_id,size_t obj_id_sz,char *data,size_t *data_sz) {TEE_ObjectHandle object;TEE_ObjectInfo object_info;TEE_Result res;EMSG("%s : enter", __func__);EMSG("%s : obj_id=[%s], obj_id_sz=[%d], data_sz=[%d]", __func__, obj_id, obj_id_sz, *data_sz);res = TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, obj_id, obj_id_sz, READ_FLAG, &object);if (res != TEE_SUCCESS) {EMSG("Failed to open persistent object, res=0x%08x", res);return res;}res = TEE_GetObjectInfo1(object, &object_info);if (res != TEE_SUCCESS) {EMSG("Failed to create persistent object, res=0x%08x", res);TEE_CloseObject(object);return res;}EMSG("%s : object_info.dataSize=[%d], data_sz=[%d]", __func__, object_info.dataSize, *data_sz);if (object_info.dataSize > data_sz) {TEE_CloseObject(object);return TEE_ERROR_SHORT_BUFFER;}res = TEE_ReadObjectData(object, data, object_info.dataSize, data_sz);if (res != TEE_SUCCESS || *data_sz != object_info.dataSize) {EMSG("TEE_ReadObjectData failed 0x%08x, read %" PRIu32 " over %u", res, *data_sz, object_info.dataSize);TEE_CloseObject(object);return res;}TEE_CloseObject(object);EMSG("%s : exit", __func__);return res; }

總結

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