mirror of
https://github.com/Evolution-X/hardware_interfaces
synced 2026-02-01 16:50:18 +00:00
b108e8cd87
When a LocalTa instance is used in a fuzzer, it gets dropped at the end of processing each fuzz input. This makes the `mpsc::channel`s fail, so update to cope with this. Bug: 316075932 Test: run fuzzer on Cuttlefish Change-Id: I069f441013e269f652cbe1ff3053606f9bcb2dfd
98 lines
3.2 KiB
Rust
98 lines
3.2 KiB
Rust
/*
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//! Common functionality for non-secure/testing instance of AuthGraph.
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use authgraph_boringssl as boring;
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use authgraph_core::{
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error, keyexchange,
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ta::{AuthGraphTa, Role},
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};
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use authgraph_hal::channel::SerializedChannel;
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use log::error;
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use std::cell::RefCell;
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use std::rc::Rc;
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use std::sync::{mpsc, Mutex};
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/// Implementation of the AuthGraph TA that runs locally in-process (and which is therefore
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/// insecure).
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pub struct LocalTa {
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channels: Mutex<Channels>,
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}
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struct Channels {
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in_tx: mpsc::Sender<Vec<u8>>,
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out_rx: mpsc::Receiver<Vec<u8>>,
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}
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impl LocalTa {
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/// Create a new instance.
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pub fn new() -> Result<Self, error::Error> {
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// Create a pair of channels to communicate with the TA thread.
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let (in_tx, in_rx) = mpsc::channel();
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let (out_tx, out_rx) = mpsc::channel();
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// The TA code expects to run single threaded, so spawn a thread to run it in.
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std::thread::spawn(move || {
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let mut ta = AuthGraphTa::new(
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keyexchange::AuthGraphParticipant::new(
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boring::crypto_trait_impls(),
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Rc::new(RefCell::new(boring::test_device::AgDevice::default())),
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keyexchange::MAX_OPENED_SESSIONS,
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)
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.expect("failed to create AG participant"),
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Role::Both,
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);
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// Loop forever processing request messages.
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loop {
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let req_data: Vec<u8> = match in_rx.recv() {
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Ok(data) => data,
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Err(_) => {
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error!("local TA failed to receive request!");
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break;
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}
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};
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let rsp_data = ta.process(&req_data);
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match out_tx.send(rsp_data) {
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Ok(_) => {}
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Err(_) => {
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error!("local TA failed to send out response");
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break;
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}
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}
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}
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error!("local TA terminating!");
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});
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Ok(Self {
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channels: Mutex::new(Channels { in_tx, out_rx }),
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})
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}
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}
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impl SerializedChannel for LocalTa {
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const MAX_SIZE: usize = usize::MAX;
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fn execute(&self, req_data: &[u8]) -> binder::Result<Vec<u8>> {
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// Serialize across both request and response.
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let channels = self.channels.lock().unwrap();
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channels
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.in_tx
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.send(req_data.to_vec())
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.expect("failed to send in request");
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Ok(channels.out_rx.recv().expect("failed to receive response"))
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}
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}
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