diff --git a/biometrics/common/util/Android.bp b/biometrics/common/util/Android.bp
new file mode 100644
index 0000000..918ef72
--- /dev/null
+++ b/biometrics/common/util/Android.bp
@@ -0,0 +1,18 @@
+cc_library {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "hardware_interfaces_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    name: "android.hardware.biometrics.common.util",
+    export_include_dirs: ["include"],
+    vendor: true,
+    srcs: [
+        "CancellationSignal.cpp",
+    ],
+    shared_libs: [
+        "libbase",
+        "libbinder_ndk",
+        "android.hardware.biometrics.common-V2-ndk",
+    ],
+}
diff --git a/biometrics/common/util/CancellationSignal.cpp b/biometrics/common/util/CancellationSignal.cpp
new file mode 100644
index 0000000..7888838
--- /dev/null
+++ b/biometrics/common/util/CancellationSignal.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 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.
+ */
+
+#include "util/CancellationSignal.h"
+
+#include <android-base/logging.h>
+#include <chrono>
+
+namespace aidl::android::hardware::biometrics {
+
+CancellationSignal::CancellationSignal(std::promise<void>&& cancellationPromise)
+    : mCancellationPromise(std::move(cancellationPromise)) {}
+
+ndk::ScopedAStatus CancellationSignal::cancel() {
+    mCancellationPromise.set_value();
+    return ndk::ScopedAStatus::ok();
+}
+
+bool shouldCancel(const std::future<void>& f) {
+    CHECK(f.valid());
+    return f.wait_for(std::chrono::seconds(0)) == std::future_status::ready;
+}
+
+}  // namespace aidl::android::hardware::biometrics
diff --git a/biometrics/common/util/include/util/CancellationSignal.h b/biometrics/common/util/include/util/CancellationSignal.h
new file mode 100644
index 0000000..be77e29
--- /dev/null
+++ b/biometrics/common/util/include/util/CancellationSignal.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 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.
+ */
+
+#pragma once
+
+#include <aidl/android/hardware/biometrics/common/BnCancellationSignal.h>
+#include <functional>
+#include <future>
+
+namespace aidl::android::hardware::biometrics {
+
+class CancellationSignal : public common::BnCancellationSignal {
+  public:
+    explicit CancellationSignal(std::promise<void>&& cancellationPromise);
+
+    ndk::ScopedAStatus cancel() override;
+
+  private:
+    std::promise<void> mCancellationPromise;
+};
+
+// Returns whether the given cancellation future is ready, i.e. whether the operation corresponding
+// to this future should be cancelled.
+bool shouldCancel(const std::future<void>& cancellationFuture);
+
+}  // namespace aidl::android::hardware::biometrics