Block access to sensors when Sensor Privacy Mode enabled
Test: manually verified sensor access based on state of sensor privacy
mode.
Bug: 110842805
Change-Id: I4f2f2496356ff4a407e5c0cd32bc0abcf0c8b48f
diff --git a/libs/sensorprivacy/Android.bp b/libs/sensorprivacy/Android.bp
new file mode 100644
index 0000000..e0e3469
--- /dev/null
+++ b/libs/sensorprivacy/Android.bp
@@ -0,0 +1,47 @@
+// Copyright 2018 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: "libsensorprivacy",
+
+ aidl: {
+ export_aidl_headers: true,
+ local_include_dirs: ["aidl"],
+ },
+
+ cflags: [
+ "-Wall",
+ "-Wextra",
+ "-Werror",
+ "-Wzero-as-null-pointer-constant",
+ ],
+
+ srcs: [
+ "aidl/android/hardware/ISensorPrivacyListener.aidl",
+ "aidl/android/hardware/ISensorPrivacyManager.aidl",
+ "SensorPrivacyManager.cpp",
+ ],
+
+ shared_libs: [
+ "libbinder",
+ "libcutils",
+ "libutils",
+ "liblog",
+ "libhardware",
+ ],
+
+ export_include_dirs: ["include"],
+
+ export_shared_lib_headers: ["libbinder"],
+}
diff --git a/libs/sensorprivacy/SensorPrivacyManager.cpp b/libs/sensorprivacy/SensorPrivacyManager.cpp
new file mode 100644
index 0000000..1da79a0
--- /dev/null
+++ b/libs/sensorprivacy/SensorPrivacyManager.cpp
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2018 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 <mutex>
+#include <unistd.h>
+
+#include <binder/Binder.h>
+#include <binder/IServiceManager.h>
+#include <sensorprivacy/SensorPrivacyManager.h>
+
+#include <utils/SystemClock.h>
+
+namespace android {
+
+SensorPrivacyManager::SensorPrivacyManager()
+{
+}
+
+sp<hardware::ISensorPrivacyManager> SensorPrivacyManager::getService()
+{
+ std::lock_guard<Mutex> scoped_lock(mLock);
+ int64_t startTime = 0;
+ sp<hardware::ISensorPrivacyManager> service = mService;
+ while (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
+ sp<IBinder> binder = defaultServiceManager()->checkService(String16("sensor_privacy"));
+ if (binder == nullptr) {
+ // Wait for the sensor privacy service to come back...
+ if (startTime == 0) {
+ startTime = uptimeMillis();
+ ALOGI("Waiting for sensor privacy service");
+ } else if ((uptimeMillis() - startTime) > 1000000) {
+ ALOGW("Waiting too long for sensor privacy service, giving up");
+ service = nullptr;
+ break;
+ }
+ usleep(25000);
+ } else {
+ service = interface_cast<hardware::ISensorPrivacyManager>(binder);
+ mService = service;
+ }
+ }
+ return service;
+}
+
+void SensorPrivacyManager::addSensorPrivacyListener(
+ const sp<hardware::ISensorPrivacyListener>& listener)
+{
+ sp<hardware::ISensorPrivacyManager> service = getService();
+ if (service != nullptr) {
+ service->addSensorPrivacyListener(listener);
+ }
+}
+
+void SensorPrivacyManager::removeSensorPrivacyListener(
+ const sp<hardware::ISensorPrivacyListener>& listener)
+{
+ sp<hardware::ISensorPrivacyManager> service = getService();
+ if (service != nullptr) {
+ service->removeSensorPrivacyListener(listener);
+ }
+}
+
+bool SensorPrivacyManager::isSensorPrivacyEnabled()
+{
+ sp<hardware::ISensorPrivacyManager> service = getService();
+ if (service != nullptr) {
+ bool result;
+ service->isSensorPrivacyEnabled(&result);
+ return result;
+ }
+ // if the SensorPrivacyManager is not available then assume sensor privacy is disabled
+ return false;
+}
+
+}; // namespace android
diff --git a/libs/sensorprivacy/aidl/android/hardware/ISensorPrivacyListener.aidl b/libs/sensorprivacy/aidl/android/hardware/ISensorPrivacyListener.aidl
new file mode 100644
index 0000000..58177d8
--- /dev/null
+++ b/libs/sensorprivacy/aidl/android/hardware/ISensorPrivacyListener.aidl
@@ -0,0 +1,24 @@
+/**
+ * Copyright (c) 2018, 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.hardware;
+
+/**
+ * @hide
+ */
+oneway interface ISensorPrivacyListener {
+ void onSensorPrivacyChanged(boolean enabled);
+}
diff --git a/libs/sensorprivacy/aidl/android/hardware/ISensorPrivacyManager.aidl b/libs/sensorprivacy/aidl/android/hardware/ISensorPrivacyManager.aidl
new file mode 100644
index 0000000..4c2d5db
--- /dev/null
+++ b/libs/sensorprivacy/aidl/android/hardware/ISensorPrivacyManager.aidl
@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2018, 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.hardware;
+
+import android.hardware.ISensorPrivacyListener;
+
+/** @hide */
+interface ISensorPrivacyManager {
+ void addSensorPrivacyListener(in ISensorPrivacyListener listener);
+
+ void removeSensorPrivacyListener(in ISensorPrivacyListener listener);
+
+ boolean isSensorPrivacyEnabled();
+
+ void setSensorPrivacy(boolean enable);
+}
diff --git a/libs/sensorprivacy/include/sensorprivacy/SensorPrivacyManager.h b/libs/sensorprivacy/include/sensorprivacy/SensorPrivacyManager.h
new file mode 100644
index 0000000..8826595
--- /dev/null
+++ b/libs/sensorprivacy/include/sensorprivacy/SensorPrivacyManager.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+
+#ifndef ANDROID_SENSOR_PRIVACY_MANAGER_H
+#define ANDROID_SENSOR_PRIVACY_MANAGER_H
+
+#include "android/hardware/ISensorPrivacyListener.h"
+#include "android/hardware/ISensorPrivacyManager.h"
+
+#include <utils/threads.h>
+
+// ---------------------------------------------------------------------------
+namespace android {
+
+class SensorPrivacyManager
+{
+public:
+ SensorPrivacyManager();
+
+ void addSensorPrivacyListener(const sp<hardware::ISensorPrivacyListener>& listener);
+ void removeSensorPrivacyListener(const sp<hardware::ISensorPrivacyListener>& listener);
+ bool isSensorPrivacyEnabled();
+
+private:
+ Mutex mLock;
+ sp<hardware::ISensorPrivacyManager> mService;
+ sp<hardware::ISensorPrivacyManager> getService();
+};
+
+
+}; // namespace android
+// ---------------------------------------------------------------------------
+
+#endif // ANDROID_SENSOR_PRIVACY_MANAGER_H