am d132892a: Merge "Don\'t touch the VFS during window relayout." into gingerbread (0b7b9807) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/widget/LockPatternUtils.java

+35 −30

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ package com.android.internal.widget;
		import android.app.admin.DevicePolicyManager;
		import android.content.ContentResolver;
		import android.content.Context;
		import android.os.FileObserver;
		import android.os.RemoteException;
		import android.os.ServiceManager;
		import android.os.SystemClock;
		@@ -33,6 +34,7 @@ import com.android.internal.R;
		import com.android.internal.telephony.ITelephony;
		import com.google.android.collect.Lists;

		import java.io.File;
		import java.io.FileNotFoundException;
		import java.io.IOException;
		import java.io.RandomAccessFile;
		@@ -40,6 +42,7 @@ import java.security.NoSuchAlgorithmException;
		import java.security.SecureRandom;
		import java.util.Arrays;
		import java.util.List;
		import java.util.concurrent.atomic.AtomicBoolean;

		/**
		* Utilities for the lock patten and its settings.
		@@ -48,8 +51,9 @@ public class LockPatternUtils {

		private static final String TAG = "LockPatternUtils";

		private static final String LOCK_PATTERN_FILE = "/system/gesture.key";
		private static final String LOCK_PASSWORD_FILE = "/system/password.key";
		private static final String SYSTEM_DIRECTORY = "/system/";
		private static final String LOCK_PATTERN_FILE = "gesture.key";
		private static final String LOCK_PASSWORD_FILE = "password.key";

		/**
		* The maximum number of incorrect attempts before the user is prevented
		@@ -98,6 +102,10 @@ public class LockPatternUtils {
		private static String sLockPatternFilename;
		private static String sLockPasswordFilename;

		private static final AtomicBoolean sHaveNonZeroPatternFile = new AtomicBoolean(false);
		private static final AtomicBoolean sHaveNonZeroPasswordFile = new AtomicBoolean(false);
		private static FileObserver sPasswordObserver;

		public DevicePolicyManager getDevicePolicyManager() {
		if (mDevicePolicyManager == null) {
		mDevicePolicyManager =
		@@ -115,14 +123,31 @@ public class LockPatternUtils {
		public LockPatternUtils(Context context) {
		mContext = context;
		mContentResolver = context.getContentResolver();
		// Initialize the location of gesture lock file

		// Initialize the location of gesture & PIN lock files
		if (sLockPatternFilename == null) {
		sLockPatternFilename = android.os.Environment.getDataDirectory()
		.getAbsolutePath() + LOCK_PATTERN_FILE;
		sLockPasswordFilename = android.os.Environment.getDataDirectory()
		.getAbsolutePath() + LOCK_PASSWORD_FILE;
		String dataSystemDirectory =
		android.os.Environment.getDataDirectory().getAbsolutePath() +
		SYSTEM_DIRECTORY;
		sLockPatternFilename = dataSystemDirectory + LOCK_PATTERN_FILE;
		sLockPasswordFilename = dataSystemDirectory + LOCK_PASSWORD_FILE;
		sHaveNonZeroPatternFile.set(new File(sLockPatternFilename).length() > 0);
		sHaveNonZeroPasswordFile.set(new File(sLockPasswordFilename).length() > 0);
		int fileObserverMask = FileObserver.CLOSE_WRITE \| FileObserver.DELETE \|
		FileObserver.MOVED_TO \| FileObserver.CREATE;
		sPasswordObserver = new FileObserver(dataSystemDirectory, fileObserverMask) {
		public void onEvent(int event, String path) {
		if (LOCK_PATTERN_FILE.equals(path)) {
		Log.d(TAG, "lock pattern file changed");
		sHaveNonZeroPatternFile.set(new File(sLockPatternFilename).length() > 0);
		} else if (LOCK_PASSWORD_FILE.equals(path)) {
		Log.d(TAG, "lock password file changed");
		sHaveNonZeroPasswordFile.set(new File(sLockPasswordFilename).length() > 0);
		}
		}
		};
		sPasswordObserver.startWatching();
		}

		}

		public int getRequestedMinimumPasswordLength() {
		@@ -201,32 +226,12 @@ public class LockPatternUtils {
		}
		}

		/**
		* Checks to see if the given file exists and contains any data. Returns true if it does,
		* false otherwise.
		* @param filename
		* @return true if file exists and is non-empty.
		*/
		private boolean nonEmptyFileExists(String filename) {
		try {
		// Check if we can read a byte from the file
		RandomAccessFile raf = new RandomAccessFile(filename, "r");
		raf.readByte();
		raf.close();
		return true;
		} catch (FileNotFoundException fnfe) {
		return false;
		} catch (IOException ioe) {
		return false;
		}
		}

		/**
		* Check to see if the user has stored a lock pattern.
		* @return Whether a saved pattern exists.
		*/
		public boolean savedPatternExists() {
		return nonEmptyFileExists(sLockPatternFilename);
		return sHaveNonZeroPatternFile.get();
		}

		/**
		@@ -234,7 +239,7 @@ public class LockPatternUtils {
		* @return Whether a saved pattern exists.
		*/
		public boolean savedPasswordExists() {
		return nonEmptyFileExists(sLockPasswordFilename);
		return sHaveNonZeroPasswordFile.get();
		}

		/**