Restructuring of AAID using aidl_interface build system.

Making changes to use aidl_interface build system in
KeyAttestationApplicationProvider to support Rust, CPP and Java
backends.
Defined AAID interface and its parcelables using AIDL types.
Removed custom parcelables defined for AAID.

Bug: 267452060
Test: atest android.keystore.cts.KeyAttestationTest
Change-Id: Iec558642867c13e2998d7f69f00b3f1adf4e2b62

5 files changed, 154 insertions, 0 deletions

diff --git a/keystore/aaid/aidl/Android.bp b/keystore/aaid/aidl/Android.bp
new file mode 100644
index 000000000000..97acfb4ea4c3
--- /dev/null
+++ b/keystore/aaid/aidl/Android.bp
@@ -0,0 +1,31 @@
+// Copyright 2020, 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.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+aidl_interface {
+    name: "android.security.aaid_aidl",
+    srcs: ["android/security/keystore/*.aidl"],
+    unstable: true,
+    backend: {
+        rust: {
+            enabled: true,
+        },
+        cpp: {
+            enabled: true,
+        },
+    },
+}
diff --git a/keystore/aaid/aidl/android/security/keystore/IKeyAttestationApplicationIdProvider.aidl b/keystore/aaid/aidl/android/security/keystore/IKeyAttestationApplicationIdProvider.aidl
new file mode 100644
index 000000000000..c360cb8f281a
--- /dev/null
+++ b/keystore/aaid/aidl/android/security/keystore/IKeyAttestationApplicationIdProvider.aidl
@@ -0,0 +1,28 @@
+/**
+ * Copyright (c) 2023, 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.
+ */
+
+package android.security.keystore;
+
+import android.security.keystore.KeyAttestationApplicationId;
+
+/** @hide */
+interface IKeyAttestationApplicationIdProvider {
+    /**
+     * Provides information describing the possible applications identified by a UID.
+     * @hide
+     */
+    KeyAttestationApplicationId getKeyAttestationApplicationId(int uid);
+}
diff --git a/keystore/aaid/aidl/android/security/keystore/KeyAttestationApplicationId.aidl b/keystore/aaid/aidl/android/security/keystore/KeyAttestationApplicationId.aidl
new file mode 100644
index 000000000000..c33e8309b2f2
--- /dev/null
+++ b/keystore/aaid/aidl/android/security/keystore/KeyAttestationApplicationId.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2023, 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.
+ */
+
+package android.security.keystore;
+
+import android.security.keystore.KeyAttestationPackageInfo;
+
+/**
+ * @hide
+ * The information aggregated by this parcelable is used by keystore to identify a caller of the
+ * keystore API toward a remote party. It aggregates multiple PackageInfos because keystore
+ * can only determine a caller by uid granularity, and a uid can be shared by multiple packages.
+ * The remote party must decide if it trusts all of the packages enough to consider the
+ * confidentiality of the key material in question intact.
+ */
+parcelable KeyAttestationApplicationId {
+    KeyAttestationPackageInfo[] packageInfos;
+}
diff --git a/keystore/aaid/aidl/android/security/keystore/KeyAttestationPackageInfo.aidl b/keystore/aaid/aidl/android/security/keystore/KeyAttestationPackageInfo.aidl
new file mode 100644
index 000000000000..5f647d0b1abe
--- /dev/null
+++ b/keystore/aaid/aidl/android/security/keystore/KeyAttestationPackageInfo.aidl
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2023, 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.
+ */
+
+package android.security.keystore;
+
+import android.security.keystore.Signature;
+
+/**
+ * @hide
+ * This parcelable constitutes and excerpt from the PackageManager's PackageInfo for the purpose of
+ * key attestation. It is part of the KeyAttestationApplicationId, which is used by
+ * keystore to identify the caller of the keystore API towards a remote party.
+ */
+parcelable KeyAttestationPackageInfo {
+    String packageName;
+
+    long versionCode;
+
+    Signature[] signatures;
+}
diff --git a/keystore/aaid/aidl/android/security/keystore/Signature.aidl b/keystore/aaid/aidl/android/security/keystore/Signature.aidl
new file mode 100644
index 000000000000..800499a13355
--- /dev/null
+++ b/keystore/aaid/aidl/android/security/keystore/Signature.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2016, 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.
+ */
+
+package android.security.keystore;
+
+/**
+ * @hide
+ * Represents a signature data read from the package file. Extracted from from the PackageManager's
+ * PackageInfo for the purpose of key attestation. It is part of the KeyAttestationPackageInfo,
+ * which is used by keystore to identify the caller of the keystore API towards a remote party.
+ */
+parcelable Signature {
+    /**
+     * Represents signing certificate data associated with application package, signatures are
+     * expected to be a hex-encoded ASCII string representing valid X509 certificate.
+     */
+    byte[] data;
+}