1 /* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"), 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 /** 17 * @addtogroup TeeTrusted 18 * @{ 19 * 20 * @brief TEE(Trusted Excution Environment) API. 21 * Provides security capability APIs such as trusted storage, encryption and decryption, 22 * and trusted time for trusted application development. 23 * 24 * @since 20 25 */ 26 27 /** 28 * @file tee_drv_client.h 29 * 30 * @brief Declare tee driver client API. 31 * 32 * @library NA 33 * @kit TEEKit 34 * @syscap SystemCapability.Tee.TeeClient 35 * @since 20 36 */ 37 38 #ifndef TEE_DRV_CLIENT_H 39 #define TEE_DRV_CLIENT_H 40 41 #include <stdint.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /** 48 * @brief Open the specified driver in the TEE. 49 * 50 * @param drv_name [IN] The driver name. 51 * @param param [IN] The parameter information. 52 * @param param_len [IN] The length of the parameter. 53 * 54 * @return Returns greater than 0, which means the fd of the corresponding driver. 55 * Returns less than or equal to 0, which means falied to open the driver. 56 * 57 * @since 20 58 */ 59 int64_t tee_drv_open(const char *drv_name, const void *param, uint32_t param_len); 60 61 /** 62 * @brief Cancels an operation. 63 * 64 * @param fd [IN] The file descriptor of the driver. 65 * @param cmd_id [IN] The command id. 66 * @param param [IN] The parameter information. 67 * @param param_len [IN] The length of the parameter. 68 * 69 * @return Returns <b>0</b> if the operation is successful. 70 * Returns <b>-1</b> if the operation is failed. 71 * 72 * @since 20 73 */ 74 int64_t tee_drv_ioctl(int64_t fd, uint32_t cmd_id, const void *param, uint32_t param_len); 75 76 /** 77 * @brief Open the specified driver in the TEE. 78 * 79 * @param fd [IN] The file descriptor of the driver. 80 * 81 * @return Returns <b>0</b> if the operation is successful. 82 * Returns <b>-1</b> if the operation is failed. 83 * 84 * @since 20 85 */ 86 int64_t tee_drv_close(int64_t fd); 87 88 #ifdef __cplusplus 89 } 90 #endif 91 92 #endif 93 /** @} */