| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| use crate::{Error, Operation, Result, Session, Uuid}; |
| use crate::{Param, ParamNone}; |
| use libc; |
| use optee_teec_sys as raw; |
| use std::ptr; |
| |
| /// An abstraction of the logical connection between a client application and a |
| /// TEE. |
| pub struct Context { |
| raw: raw::TEEC_Context, |
| } |
| |
| impl Context { |
| /// Creates a TEE client context object. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// let ctx = Context::new().unwrap(); |
| /// ``` |
| pub fn new() -> Result<Context> { |
| Context::new_raw(0, true, false).map(|raw| Context { raw }) |
| } |
| |
| /// Creates a raw TEE client context with implementation defined parameters. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// let raw_ctx: optee_teec_sys::TEEC_Context = Context::new_raw(0, true).unwrap(); |
| /// ``` |
| pub fn new_raw(fd: libc::c_int, reg_mem: bool, memref_null: bool) -> Result<raw::TEEC_Context> { |
| let mut raw_ctx = raw::TEEC_Context { |
| fd, |
| reg_mem, |
| memref_null, |
| }; |
| unsafe { |
| match raw::TEEC_InitializeContext(ptr::null_mut() as *mut libc::c_char, &mut raw_ctx) { |
| raw::TEEC_SUCCESS => Ok(raw_ctx), |
| code => Err(Error::from_raw_error(code)), |
| } |
| } |
| } |
| |
| /// Converts a TEE client context to a raw pointer. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// let mut ctx = Context::new().unwrap(); |
| /// let mut raw_ptr: *mut optee_teec_sys::TEEC_Context = ctx.as_mut_raw_ptr(); |
| /// ``` |
| pub fn as_mut_raw_ptr(&mut self) -> *mut raw::TEEC_Context { |
| &mut self.raw |
| } |
| |
| /// Opens a new session with the specified trusted application. |
| /// |
| /// The target trusted application is specified by `uuid`. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// let mut ctx = Context::new().unwrap(); |
| /// let uuid = Uuid::parse_str("8abcf200-2450-11e4-abe2-0002a5d5c51b").unwrap(); |
| /// let session = ctx.open_session(uuid).unwrap(); |
| /// ``` |
| pub fn open_session(&mut self, uuid: Uuid) -> Result<Session> { |
| Session::new( |
| self, |
| uuid, |
| None::<&mut Operation<ParamNone, ParamNone, ParamNone, ParamNone>>, |
| ) |
| } |
| |
| /// Opens a new session with the specified trusted application, pass some |
| /// parameters to TA by an operation. |
| /// |
| /// The target trusted application is specified by `uuid`. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// let mut ctx = Context::new().unwrap(); |
| /// let uuid = Uuid::parse_str("8abcf200-2450-11e4-abe2-0002a5d5c51b").unwrap(); |
| /// let p0 = ParamValue(42, 0, ParamType::ValueInout); |
| /// let mut operation = Operation::new(0, p0, ParamNone, ParamNone, ParamNone); |
| /// let session = ctx.open_session_with_operation(uuid, operation).unwrap(); |
| /// ``` |
| pub fn open_session_with_operation<A: Param, B: Param, C: Param, D: Param>( |
| &mut self, |
| uuid: Uuid, |
| operation: &mut Operation<A, B, C, D>, |
| ) -> Result<Session> { |
| Session::new(self, uuid, Some(operation)) |
| } |
| } |
| |
| impl Drop for Context { |
| fn drop(&mut self) { |
| unsafe { |
| raw::TEEC_FinalizeContext(&mut self.raw); |
| } |
| } |
| } |