diff --git a/compos/src/compos_key.rs b/compos/src/compos_key.rs
index eb6248f..faa9d67 100644
--- a/compos/src/compos_key.rs
+++ b/compos/src/compos_key.rs
@@ -21,8 +21,16 @@
 const COMPOS_KEY_HELPER_PATH: &str = "/apex/com.android.compos/bin/compos_key_helper";
 
 pub fn get_public_key() -> Result<Vec<u8>> {
+    get_data_from_helper("public_key")
+}
+
+pub fn get_attestation_chain() -> Result<Vec<u8>> {
+    get_data_from_helper("bcc")
+}
+
+fn get_data_from_helper(command: &str) -> Result<Vec<u8>> {
     let child = Command::new(COMPOS_KEY_HELPER_PATH)
-        .arg("public_key")
+        .arg(command)
         .stdin(Stdio::null())
         .stdout(Stdio::piped())
         .stderr(Stdio::piped())
diff --git a/compos/src/compsvc.rs b/compos/src/compsvc.rs
index 3a794ee..e21aa7d 100644
--- a/compos/src/compsvc.rs
+++ b/compos/src/compsvc.rs
@@ -86,6 +86,10 @@
     fn getPublicKey(&self) -> BinderResult<Vec<u8>> {
         to_binder_result(compos_key::get_public_key())
     }
+
+    fn getAttestationChain(&self) -> BinderResult<Vec<u8>> {
+        to_binder_result(compos_key::get_attestation_chain())
+    }
 }
 
 fn add_artifacts(target_dir: &Path, artifact_signer: &mut ArtifactSigner) -> Result<()> {