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cinitcinit
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add Xposed hook for android nfc service
update AGP version
1 parent 8fcbc96 commit 3586577

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9 files changed

+249
-1
lines changed

9 files changed

+249
-1
lines changed

‎app/build.gradle

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@@ -89,6 +89,7 @@ dependencies {
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implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.2"
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implementation 'com.google.code.gson:gson:2.8.9'
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implementation 'androidx.preference:preference-ktx:1.1.1'
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compileOnly("de.robv.android.xposed:api:82")
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testImplementation 'junit:junit:4.13.2'
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androidTestImplementation 'androidx.test.ext:junit:1.1.3'
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androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

‎app/src/main/AndroidManifest.xml

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@@ -147,6 +147,19 @@
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</intent-filter>
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</receiver>
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<meta-data
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android:name="xposedmodule"
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android:value="true" />
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<meta-data
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android:name="xposeddescription"
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android:value="@string/xposeddescription" />
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<meta-data
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android:name="xposedminversion"
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android:value="51" />
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<meta-data
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android:name="xposedscope"
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android:resource="@array/xposedscope" />
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<meta-data
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android:name="com.sec.android.support.multiwindow"
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android:value="true" />

‎app/src/main/assets/xposed_init

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@@ -0,0 +1 @@
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cc.ioctl.nfcdevicehost.xposed.HookEntry

‎app/src/main/java/cc/ioctl/nfcdevicehost/xposed/HookEntry.java

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package cc.ioctl.nfcdevicehost.xposed;
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import de.robv.android.xposed.IXposedHookLoadPackage;
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import de.robv.android.xposed.XC_MethodHook;
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import de.robv.android.xposed.XposedHelpers;
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import de.robv.android.xposed.callbacks.XC_LoadPackage;
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public class HookEntry implements IXposedHookLoadPackage {
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private static void initNfcServiceHook(ClassLoader classLoader) {
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XposedHelpers.findAndHookMethod("com.android.nfc.NfcService", classLoader, "playSound", int.class, new XC_MethodHook() {
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@Override
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protected void beforeHookedMethod(MethodHookParam param) {
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if (SysNfcSvcPatch.sDisableNfcDiscoverySound) {
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param.setResult(null);
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}
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}
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});
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SysNfcSvcPatch.startMainThread();
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}
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@Override
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public void handleLoadPackage(XC_LoadPackage.LoadPackageParam lpparam) {
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if ("com.android.nfc".equals(lpparam.packageName)) {
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if (lpparam.isFirstApplication) {
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initNfcServiceHook(lpparam.classLoader);
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}
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}
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}
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}

‎app/src/main/java/cc/ioctl/nfcdevicehost/xposed/SysNfcSvcPatch.java

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package cc.ioctl.nfcdevicehost.xposed;
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import android.net.Credentials;
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import android.net.LocalServerSocket;
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import android.net.LocalSocket;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import de.robv.android.xposed.XposedBridge;
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public class SysNfcSvcPatch {
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private static Thread sWorkingThread = null;
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public static boolean sDisableNfcDiscoverySound = false;
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private static boolean sShouldRunning = true;
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static void run() {
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try {
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int myPid = android.os.Process.myPid();
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while (sShouldRunning) {
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LocalServerSocket localServerSocket;
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try {
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localServerSocket = new LocalServerSocket("com.android.nfc/cc.ioctl.nfcdevicehost.xposed.SysNfcSvcPatch@" + myPid);
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while (sShouldRunning) {
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LocalSocket localSocket = localServerSocket.accept();
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Credentials cred = null;
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try {
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cred = localSocket.getPeerCredentials();
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} catch (IOException ignored) {
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}
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if (cred != null && cred.getUid() == 0) {
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localServerSocket.close();
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handleTransaction(localSocket);
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// socket is closed in handleTransaction
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break;
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} else {
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try {
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localSocket.close();
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} catch (IOException ignored) {
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}
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}
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}
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} catch (IOException e) {
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XposedBridge.log("SysNfcSvcPatch: " + e.getMessage());
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XposedBridge.log(e);
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return;
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}
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}
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} catch (RuntimeException e) {
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XposedBridge.log(e);
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}
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}
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static final int TYPE_REQUEST = 1;
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static final int TYPE_RESPONSE = 2;
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static final int TYPE_EVENT = 3;
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static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
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static final int REQUEST_SET_NFC_SOUND_DISABLE = 0x30;
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static final int REQUEST_GET_NFC_SOUND_DISABLE = 0x31;
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static void handleTransaction(LocalSocket socket) {
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try {
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byte[] buffer = new byte[65536];
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InputStream is = socket.getInputStream();
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while (sShouldRunning) {
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// read 4 bytes length
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readFully(is, buffer, 0, 4);
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int length = getInt32Le(buffer, 0);
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if (length < 16 || length > 65535) {
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break;
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}
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// read length bytes
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readFully(is, buffer, 0, length);
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// uint32_t type
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int type = getInt32Le(buffer, 0);
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// uint32_t sequence
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int sequence = getInt32Le(buffer, 4);
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// uint32_t requestCode
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int requestCode = getInt32Le(buffer, 8);
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// uint32_t arg0
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int arg0 = getInt32Le(buffer, 12);
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byte[] data;
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if (length > 16) {
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data = new byte[length - 16];
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System.arraycopy(buffer, 16, data, 0, length - 16);
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} else {
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data = EMPTY_BYTE_ARRAY;
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}
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switch (type) {
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case TYPE_REQUEST:
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handleRequest(socket, sequence, requestCode, arg0, data);
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break;
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case TYPE_RESPONSE:
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case TYPE_EVENT:
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default:
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break;
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}
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}
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} catch (IOException e) {
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XposedBridge.log("SysNfcSvcPatch: " + e.getMessage());
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}
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try {
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socket.close();
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} catch (IOException ignored) {
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}
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}
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private static void handleRequest(LocalSocket socket, int sequence, int requestCode, int arg0, byte[] data) {
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switch (requestCode) {
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case REQUEST_SET_NFC_SOUND_DISABLE: {
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sDisableNfcDiscoverySound = (arg0 != 0);
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sendResponse(socket, sequence, 0, 0, null);
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break;
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}
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case REQUEST_GET_NFC_SOUND_DISABLE: {
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sendResponse(socket, sequence, sDisableNfcDiscoverySound ? 1 : 0, 0, null);
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break;
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}
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default: {
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sendResponse(socket, sequence, -1, -1, null);
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}
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}
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}
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static void sendResponse(LocalSocket socket, int sequence, int resultCode, int errCode, byte[] data) {
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if (data == null) {
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data = EMPTY_BYTE_ARRAY;
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}
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byte[] bufferLen4 = new byte[4];
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putInt32Le(bufferLen4, 0, data.length + 16);
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byte[] buffer = new byte[16 + data.length];
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putInt32Le(buffer, 0, TYPE_RESPONSE);
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putInt32Le(buffer, 4, sequence);
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putInt32Le(buffer, 8, resultCode);
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putInt32Le(buffer, 12, errCode);
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System.arraycopy(data, 0, buffer, 16, data.length);
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try {
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OutputStream os = socket.getOutputStream();
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os.write(bufferLen4);
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os.write(buffer);
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os.flush();
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} catch (IOException e) {
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XposedBridge.log("SysNfcSvcPatch: " + e.getMessage());
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}
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}
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public static synchronized void startMainThread() {
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if (sWorkingThread == null || !sWorkingThread.isAlive()) {
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sWorkingThread = new Thread(SysNfcSvcPatch::run);
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sWorkingThread.start();
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}
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}
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static void readFully(InputStream is, byte[] buffer, int offset, int length) throws IOException {
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int remaining = length;
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while (remaining > 0) {
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int read = is.read(buffer, offset, remaining);
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if (read < 0) {
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throw new IOException("Unexpected EOF");
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}
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remaining -= read;
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offset += read;
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}
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}
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/**
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* Read a little-endian 32-bit integer from the given byte array.
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*
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* @param buffer The byte array to read from.
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* @param offset The offset to start reading from.
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* @return The 32-bit integer read.
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*/
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static int getInt32Le(byte[] buffer, int offset) {
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return (buffer[offset] & 0xFF) | ((buffer[offset + 1] & 0xFF) << 8)
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| ((buffer[offset + 2] & 0xFF) << 16) | ((buffer[offset + 3] & 0xFF) << 24);
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}
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/**
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* Put a little-endian 32-bit integer to the given byte array.
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*
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* @param buffer The byte array to write to.
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* @param offset The offset to start writing to.
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* @param value the value to put
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*/
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static void putInt32Le(byte[] buffer, int offset, int value) {
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buffer[offset] = (byte) (value & 0xFF);
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buffer[offset + 1] = (byte) ((value >> 8) & 0xFF);
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buffer[offset + 2] = (byte) ((value >> 16) & 0xFF);
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buffer[offset + 3] = (byte) ((value >> 24) & 0xFF);
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}
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}

‎app/src/main/res/values-zh-rCN/strings.xml

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@@ -70,5 +70,6 @@ NCI Host 的开发人员不对使用此应用程序造成的任何损失负责
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<string name="action_decoder_config">解码选项</string>
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<string name="ui_hal_dump_decoder_config_title">解码选项</string>
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<string name="action_confirm">确认</string>
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<string name="xposeddescription">NFC 系统服务附加功能</string>
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</resources>

‎app/src/main/res/values/arrays.xml

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<item>reply</item>
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<item>reply_all</item>
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</string-array>
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<string-array name="ui_hal_dump_decoder_config_items">
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<item>None(raw syscall dump)</item>
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<item>NCI protocol</item>
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</string-array>
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<string-array name="xposedscope">
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<item>com.android.nfc</item>
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</string-array>
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</resources>

‎app/src/main/res/values/strings.xml

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@@ -99,4 +99,5 @@ By using this application, you accept all responsibility using it and agree that
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<string name="action_decoder_config">Decoder properties</string>
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<string name="ui_hal_dump_decoder_config_title">Decoder Properties</string>
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<string name="action_confirm">Confirm</string>
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<string name="xposeddescription">Extra features for NFC service.</string>
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</resources>

‎build.gradle

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@@ -7,7 +7,7 @@ buildscript {
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mavenCentral()
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}
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dependencies {
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classpath 'com.android.tools.build:gradle:7.0.3'
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classpath 'com.android.tools.build:gradle:7.0.4'
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classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
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// NOTE: Do not place your application dependencies here; they belong
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// in the individual module build.gradle files
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google()
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mavenCentral()
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maven { url 'https://jitpack.io' }
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maven { url 'https://api.xposed.info/' }
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}
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}
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