commit 16fbb61f5917c5902d4cbe9c0e99d0a7fcd0f0a0
author Alice Wang <aliceywang@google.com> Tue Oct 31 15:16:55 2023 +0000
committer Gerrit Code Review <noreply-gerritcodereview@google.com> Tue Oct 31 15:17:00 2023 +0000
tree 784850f3160a10f8fb3e045d097810ed96e81188
parent aef79352008f980047ea897854236e1ef0829a5a

Revert "Revert "[rkp] Expose RKP Hal implementation in virtualiz..."

Revert submission 2812435-revert-2778549-expose-avf-rkp-hal-GTFGLMUUKQ

Reason for revert: This change relands the topic
https://r.android.com/q/topic:%22expose-avf-rkp-hal%22
This SELinux denial has been fixed in system/sepolicy

Reverted changes: /q/submissionid:2812435-revert-2778549-expose-avf-rkp-hal-GTFGLMUUKQ

Change-Id: I87b2df911bd6e39b717497e730a1b56156b692f1

virtualizationservice/src/main.rs

diff --git a/virtualizationservice/src/main.rs b/virtualizationservice/src/main.rs
index fd668bc..c2e55eb 100644
--- a/virtualizationservice/src/main.rs
+++ b/virtualizationservice/src/main.rs
@@ -33,8 +33,8 @@
 use std::path::Path;
 
 const LOG_TAG: &str = "VirtualizationService";
-const _REMOTELY_PROVISIONED_COMPONENT_SERVICE_NAME: &str =
-    "android.system.virtualization.IRemotelyProvisionedComponent/avf";
+const REMOTELY_PROVISIONED_COMPONENT_SERVICE_NAME: &str =
+    "android.hardware.security.keymint.IRemotelyProvisionedComponent/avf";
 
 fn get_calling_pid() -> pid_t {
     ThreadState::get_calling_pid()
@@ -69,10 +69,17 @@
     register_lazy_service(BINDER_SERVICE_IDENTIFIER, service.as_binder()).unwrap();
     info!("Registered Binder service {}.", BINDER_SERVICE_IDENTIFIER);
 
-    // The IRemotelyProvisionedComponent service is only supposed to be triggered by rkpd for
-    // RKP VM attestation.
-    let _remote_provisioning_service = remote_provisioning::new_binder();
-    // TODO(b/274881098): Register the RKP service when the implementation is ready.
+    if cfg!(remote_attestation) {
+        // The IRemotelyProvisionedComponent service is only supposed to be triggered by rkpd for
+        // RKP VM attestation.
+        let remote_provisioning_service = remote_provisioning::new_binder();
+        register_lazy_service(
+            REMOTELY_PROVISIONED_COMPONENT_SERVICE_NAME,
+            remote_provisioning_service.as_binder(),
+        )
+        .unwrap();
+        info!("Registered Binder service {}.", REMOTELY_PROVISIONED_COMPONENT_SERVICE_NAME);
+    }
 
     ProcessState::join_thread_pool();
 }

virtualizationservice/src/remote_provisioning.rs

diff --git a/virtualizationservice/src/remote_provisioning.rs b/virtualizationservice/src/remote_provisioning.rs
index a9a07a5..40f54db 100644
--- a/virtualizationservice/src/remote_provisioning.rs
+++ b/virtualizationservice/src/remote_provisioning.rs
@@ -27,7 +27,11 @@
 };
 use anyhow::Context;
 use avflog::LogResult;
-use binder::{BinderFeatures, Interface, IntoBinderResult, Result as BinderResult, Status, Strong};
+use binder::{
+    BinderFeatures, ExceptionCode, Interface, IntoBinderResult, Result as BinderResult, Status,
+    Strong,
+};
+use hypervisor_props::is_protected_vm_supported;
 use service_vm_comm::{RequestProcessingError, Response};
 
 /// Constructs a binder object that implements `IRemotelyProvisionedComponent`.
@@ -45,11 +49,13 @@
 #[allow(non_snake_case)]
 impl IRemotelyProvisionedComponent for AvfRemotelyProvisionedComponent {
     fn getHardwareInfo(&self) -> BinderResult<RpcHardwareInfo> {
+        check_protected_vm_is_supported()?;
+
         Ok(RpcHardwareInfo {
             versionNumber: 3,
             rpcAuthorName: String::from("Android Virtualization Framework"),
             supportedEekCurve: CURVE_NONE,
-            uniqueId: Some(String::from("Android Virtualization Framework 1")),
+            uniqueId: Some(String::from("AVF Remote Provisioning 1")),
             supportedNumKeysInCsr: MIN_SUPPORTED_NUM_KEYS_IN_CSR,
         })
     }
@@ -59,6 +65,8 @@
         testMode: bool,
         macedPublicKey: &mut MacedPublicKey,
     ) -> BinderResult<Vec<u8>> {
+        check_protected_vm_is_supported()?;
+
         if testMode {
             return Err(Status::new_service_specific_error_str(
                 STATUS_REMOVED,
@@ -101,6 +109,8 @@
         keysToSign: &[MacedPublicKey],
         challenge: &[u8],
     ) -> BinderResult<Vec<u8>> {
+        check_protected_vm_is_supported()?;
+
         const MAX_CHALLENGE_SIZE: usize = 64;
         if challenge.len() > MAX_CHALLENGE_SIZE {
             let message = format!(
@@ -123,6 +133,18 @@
     }
 }
 
+fn check_protected_vm_is_supported() -> BinderResult<()> {
+    if is_protected_vm_supported().unwrap_or(false) {
+        Ok(())
+    } else {
+        Err(Status::new_exception_str(
+            ExceptionCode::UNSUPPORTED_OPERATION,
+            Some("Protected VM support is missing for this operation"),
+        ))
+        .with_log()
+    }
+}
+
 fn to_service_specific_error(response: Response) -> Status {
     match response {
         Response::Err(e) => match e {