1 files changed, 107 insertions, 0 deletions
diff --git a/security/dice/aidl/default/service.rs b/security/dice/aidl/default/service.rs
new file mode 100644
index 0000000000..eebf3332a6
--- /dev/null
+++ b/security/dice/aidl/default/service.rs
@@ -0,0 +1,107 @@
+// 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();
+}