diff --git a/keystore-engine/Android.bp b/keystore-engine/Android.bp
new file mode 100644
index 0000000..e7cd09d
--- /dev/null
+++ b/keystore-engine/Android.bp
@@ -0,0 +1,74 @@
+// Copyright (C) 2012 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.
+
+cc_library_shared {
+    name: "libkeystore-engine",
+
+    srcs: [
+        "android_engine.cpp",
+        "keystore_backend_binder.cpp",
+    ],
+
+    cflags: [
+        "-fvisibility=hidden",
+        "-Wall",
+        "-Werror",
+    ],
+    cpp_std: "c++17",
+
+    shared_libs: [
+        "libbinder",
+        "libcrypto",
+        "libcutils",
+        "libhidlbase",
+        "libkeystore_aidl",
+        "libkeystore_binder",
+        "libkeystore_parcelables",
+        "liblog",
+        "libbase",
+        "libutils",
+    ],
+
+}
+
+// This builds a variant of libkeystore-engine that uses a HIDL HAL
+// owned by the WiFi user to perform signing operations.
+cc_library_shared {
+    name: "libkeystore-engine-wifi-hidl",
+
+    srcs: [
+        "android_engine.cpp",
+        "keystore_backend_hidl.cpp",
+    ],
+
+    cflags: [
+        "-fvisibility=hidden",
+        "-Wall",
+        "-Werror",
+        "-DBACKEND_WIFI_HIDL",
+    ],
+    cpp_std: "c++17",
+
+    shared_libs: [
+        "android.system.wifi.keystore@1.0",
+        "libcrypto",
+        "liblog",
+        "libhidlbase",
+        "libhidltransport",
+        "libcutils",
+        "libutils",
+    ],
+
+    vendor: true,
+}