NIAP: implement bluetooth keystore interface.(1/2) am: b83b36f8f9 (466113d5) · Commits · e / os / android_packages_modules_Bluetooth

android/app/jni/com_android_bluetooth.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -153,6 +153,8 @@ int register_com_android_bluetooth_gatt (JNIEnv* env);
		int register_com_android_bluetooth_sdp (JNIEnv* env);

		int register_com_android_bluetooth_hearing_aid(JNIEnv* env);

		int register_com_android_bluetooth_btservice_BluetoothKeystore(JNIEnv* env);
		}

		#endif /* COM_ANDROID_BLUETOOTH_H */

android/app/jni/com_android_bluetooth_btservice_AdapterService.cpp

+7 −0

Original line number	Diff line number	Diff line
		@@ -1377,6 +1377,13 @@ jint JNI_OnLoad(JavaVM* jvm, void* reserved) {
		return JNI_ERR;
		}

		status =
		android::register_com_android_bluetooth_btservice_BluetoothKeystore(e);
		if (status < 0) {
		ALOGE("jni BluetoothKeyStore registration failure: %d", status);
		return JNI_ERR;
		}

		status = android::register_com_android_bluetooth_hfp(e);
		if (status < 0) {
		ALOGE("jni hfp registration failure, status: %d", status);

android/app/jni/com_android_bluetooth_btservice_BluetoothKeystore.cpp

0 → 100644

+171 −0

Original line number	Diff line number	Diff line
		/*
		* 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.
		*/

		#define LOG_TAG "BluetoothKeystoreServiceJni"

		#include "base/logging.h"
		#include "com_android_bluetooth.h"
		#include "hardware/bt_keystore.h"

		#include <string.h>
		#include <shared_mutex>

		using bluetooth::bluetooth_keystore::BluetoothKeystoreCallbacks;
		using bluetooth::bluetooth_keystore::BluetoothKeystoreInterface;

		namespace android {
		static jmethodID method_setEncryptKeyOrRemoveKeyCallback;
		static jmethodID method_getKeyCallback;

		static BluetoothKeystoreInterface* sBluetoothKeystoreInterface = nullptr;
		static std::shared_timed_mutex interface_mutex;

		static jobject mCallbacksObj = nullptr;
		static std::shared_timed_mutex callbacks_mutex;

		class BluetoothKeystoreCallbacksImpl
		: public bluetooth::bluetooth_keystore::BluetoothKeystoreCallbacks {
		public:
		~BluetoothKeystoreCallbacksImpl() = default;

		void set_encrypt_key_or_remove_key(
		const std::string prefixString,
		const std::string decryptedString) override {
		LOG(INFO) << __func__;

		std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
		CallbackEnv sCallbackEnv(__func__);
		if (!sCallbackEnv.valid() \|\| mCallbacksObj == nullptr) return;

		jstring j_prefixString = sCallbackEnv->NewStringUTF(prefixString.c_str());
		jstring j_decryptedString =
		sCallbackEnv->NewStringUTF(decryptedString.c_str());

		sCallbackEnv->CallVoidMethod(mCallbacksObj,
		method_setEncryptKeyOrRemoveKeyCallback,
		j_prefixString, j_decryptedString);
		}

		std::string get_key(const std::string prefixString) override {
		LOG(INFO) << __func__;

		std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
		CallbackEnv sCallbackEnv(__func__);
		if (!sCallbackEnv.valid() \|\| mCallbacksObj == nullptr) return "";

		jstring j_prefixString = sCallbackEnv->NewStringUTF(prefixString.c_str());

		jstring j_decrypt_str = (jstring)sCallbackEnv->CallObjectMethod(
		mCallbacksObj, method_getKeyCallback, j_prefixString);

		if (j_decrypt_str == nullptr) {
		ALOGE("%s: Got a null decrypt_str", __func__);
		return "";
		}

		const char* value = sCallbackEnv->GetStringUTFChars(j_decrypt_str, nullptr);
		std::string ret(value);
		sCallbackEnv->ReleaseStringUTFChars(j_decrypt_str, value);

		return ret;
		}
		};

		static BluetoothKeystoreCallbacksImpl sBluetoothKeystoreCallbacks;

		static void classInitNative(JNIEnv* env, jclass clazz) {
		method_setEncryptKeyOrRemoveKeyCallback =
		env->GetMethodID(clazz, "setEncryptKeyOrRemoveKeyCallback",
		"(Ljava/lang/String;Ljava/lang/String;)V");

		method_getKeyCallback = env->GetMethodID(
		clazz, "getKeyCallback", "(Ljava/lang/String;)Ljava/lang/String;");

		LOG(INFO) << __func__ << ": succeeds";
		}

		static void initNative(JNIEnv* env, jobject object) {
		std::unique_lock<std::shared_timed_mutex> interface_lock(interface_mutex);
		std::unique_lock<std::shared_timed_mutex> callbacks_lock(callbacks_mutex);

		const bt_interface_t* btInf = getBluetoothInterface();
		if (btInf == nullptr) {
		LOG(ERROR) << "Bluetooth module is not loaded";
		return;
		}

		if (sBluetoothKeystoreInterface != nullptr) {
		LOG(INFO)
		<< "Cleaning up BluetoothKeystore Interface before initializing...";
		sBluetoothKeystoreInterface = nullptr;
		}

		if (mCallbacksObj != nullptr) {
		LOG(INFO) << "Cleaning up BluetoothKeystore callback object";
		env->DeleteGlobalRef(mCallbacksObj);
		mCallbacksObj = nullptr;
		}

		if ((mCallbacksObj = env->NewGlobalRef(object)) == nullptr) {
		LOG(ERROR)
		<< "Failed to allocate Global Ref for BluetoothKeystore Callbacks";
		return;
		}

		sBluetoothKeystoreInterface =
		(BluetoothKeystoreInterface*)btInf->get_profile_interface(BT_KEYSTORE_ID);
		if (sBluetoothKeystoreInterface == nullptr) {
		LOG(ERROR) << "Failed to get BluetoothKeystore Interface";
		return;
		}

		sBluetoothKeystoreInterface->init(&sBluetoothKeystoreCallbacks);
		}

		static void cleanupNative(JNIEnv* env, jobject object) {
		std::unique_lock<std::shared_timed_mutex> interface_lock(interface_mutex);
		std::unique_lock<std::shared_timed_mutex> callbacks_lock(callbacks_mutex);

		const bt_interface_t* btInf = getBluetoothInterface();
		if (btInf == nullptr) {
		LOG(ERROR) << "Bluetooth module is not loaded";
		return;
		}

		if (sBluetoothKeystoreInterface != nullptr) {
		sBluetoothKeystoreInterface = nullptr;
		}

		if (mCallbacksObj != nullptr) {
		env->DeleteGlobalRef(mCallbacksObj);
		mCallbacksObj = nullptr;
		}
		}

		static JNINativeMethod sMethods[] = {
		{"classInitNative", "()V", (void*)classInitNative},
		{"initNative", "()V", (void*)initNative},
		{"cleanupNative", "()V", (void*)cleanupNative},
		};

		int register_com_android_bluetooth_btservice_BluetoothKeystore(JNIEnv* env) {
		return jniRegisterNativeMethods(
		env,
		"com/android/bluetooth/btservice/bluetoothkeystore/"
		"BluetoothKeystoreNativeInterface",
		sMethods, NELEM(sMethods));
		}
		} // namespace android

android/app/src/com/android/bluetooth/btservice/AdapterService.java

+2 −0

Original line number	Diff line number	Diff line
		@@ -453,6 +453,8 @@ public class AdapterService extends Service {
		mBatteryStats = IBatteryStats.Stub.asInterface(
		ServiceManager.getService(BatteryStats.SERVICE_NAME));

		mBluetoothKeystoreService.initJni();

		mSdpManager = SdpManager.init(this);
		registerReceiver(mAlarmBroadcastReceiver, new IntentFilter(ACTION_ALARM_WAKEUP));

android/app/src/com/android/bluetooth/btservice/bluetoothKeystore/BluetoothKeystoreNativeInterface.java

0 → 100644

+104 −0

Original line number	Diff line number	Diff line
		/*
		* 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 com.android.bluetooth.btservice.bluetoothkeystore;

		import android.util.Log;

		import com.android.internal.annotations.GuardedBy;

		import java.io.IOException;
		import java.security.NoSuchAlgorithmException;

		final class BluetoothKeystoreNativeInterface {

		private static final String TAG = "BluetoothKeystoreNativeInterface";

		@GuardedBy("INSTANCE_LOCK")
		private static BluetoothKeystoreNativeInterface sInstance;
		private static final Object INSTANCE_LOCK = new Object();

		static {
		classInitNative();
		}

		private BluetoothKeystoreNativeInterface() {
		}

		/**
		* Get singleton instance.
		*/
		public static BluetoothKeystoreNativeInterface getInstance() {
		synchronized (INSTANCE_LOCK) {
		if (sInstance == null) {
		sInstance = new BluetoothKeystoreNativeInterface();
		}
		return sInstance;
		}
		}

		/**
		* Initializes the native interface.
		*
		* priorities to configure.
		*/
		public void init() {
		initNative();
		}

		/**
		* Cleanup the native interface.
		*/
		public void cleanup() {
		cleanupNative();
		}

		// Callbacks from the native stack back into the Java framework.
		// All callbacks are routed via the Service which will disambiguate which
		// state machine the message should be routed to.

		private void setEncryptKeyOrRemoveKeyCallback(String prefixString, String decryptedString) {
		BluetoothKeystoreService service = BluetoothKeystoreService.getBluetoothKeystoreService();
		if (service != null) {
		try {
		service.setEncryptKeyOrRemoveKey(prefixString, decryptedString);
		} catch (InterruptedException e) {
		Log.e(TAG, "Interrupted while operating.");
		} catch (IOException e) {
		Log.e(TAG, "IO error while file operating.");
		} catch (NoSuchAlgorithmException e) {
		Log.e(TAG, "encrypt could not find the algorithm: SHA256");
		}
		} else {
		Log.e(TAG, "Event ignored, service not available: " + prefixString);
		}
		}

		private String getKeyCallback(String prefixString) {
		BluetoothKeystoreService service = BluetoothKeystoreService.getBluetoothKeystoreService();
		if (service != null) {
		return service.getKey(prefixString);
		} else {
		Log.e(TAG, "Event ignored, service not available: " + prefixString);
		return null;
		}
		}

		// Native methods that call into the JNI interface
		private static native void classInitNative();
		private native void initNative();
		private native void cleanupNative();
		}