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// Copyright 2021, The Android Open Source Project
//
// Licensed 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.
//! Main entry point for the android.hardware.security.dice service.
use anyhow::Result;
use diced::{
dice,
hal_node::{DiceArtifacts, DiceDevice, ResidentHal, UpdatableDiceArtifacts},
};
use diced_sample_inputs::make_sample_bcc_and_cdis;
use serde::{Deserialize, Serialize};
use std::convert::TryInto;
use std::panic;
use std::sync::Arc;
static DICE_HAL_SERVICE_NAME: &str = "android.hardware.security.dice.IDiceDevice/default";
#[derive(Debug, Serialize, Deserialize, Clone)]
struct InsecureSerializableArtifacts {
cdi_attest: [u8; dice::CDI_SIZE],
cdi_seal: [u8; dice::CDI_SIZE],
bcc: Vec<u8>,
}
impl DiceArtifacts for InsecureSerializableArtifacts {
fn cdi_attest(&self) -> &[u8; dice::CDI_SIZE] {
&self.cdi_attest
}
fn cdi_seal(&self) -> &[u8; dice::CDI_SIZE] {
&self.cdi_seal
}
fn bcc(&self) -> Vec<u8> {
self.bcc.clone()
}
}
impl UpdatableDiceArtifacts for InsecureSerializableArtifacts {
fn with_artifacts<F, T>(&self, f: F) -> Result<T>
where
F: FnOnce(&dyn DiceArtifacts) -> Result<T>,
{
f(self)
}
fn update(self, new_artifacts: &impl DiceArtifacts) -> Result<Self> {
Ok(Self {
cdi_attest: *new_artifacts.cdi_attest(),
cdi_seal: *new_artifacts.cdi_seal(),
bcc: new_artifacts.bcc(),
})
}
}
fn main() {
android_logger::init_once(
android_logger::Config::default()
.with_tag("android.hardware.security.dice")
.with_min_level(log::Level::Debug),
);
// Redirect panic messages to logcat.
panic::set_hook(Box::new(|panic_info| {
log::error!("{}", panic_info);
}));
// Saying hi.
log::info!("android.hardware.security.dice is starting.");
let (cdi_attest, cdi_seal, bcc) =
make_sample_bcc_and_cdis().expect("Failed to construct sample dice chain.");
let hal_impl = Arc::new(
unsafe {
// Safety: ResidentHal cannot be used in multi threaded processes.
// This service does not start a thread pool. The main thread is the only thread
// joining the thread pool, thereby keeping the process single threaded.
ResidentHal::new(InsecureSerializableArtifacts {
cdi_attest: cdi_attest[..]
.try_into()
.expect("Failed to convert cdi_attest to array reference."),
cdi_seal: cdi_seal[..]
.try_into()
.expect("Failed to convert cdi_seal to array reference."),
bcc,
})
}
.expect("Failed to create ResidentHal implementation."),
);
let hal = DiceDevice::new_as_binder(hal_impl).expect("Failed to construct hal service.");
binder::add_service(DICE_HAL_SERVICE_NAME, hal.as_binder())
.expect("Failed to register IDiceDevice Service");
log::info!("Joining thread pool now.");
binder::ProcessState::join_thread_pool();
}
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