services/java/com/android/server/DevicePolicyManagerService.java - LeafOS-Project/android_frameworks_base - Gitiles

 /*
  * Copyright (C) 2010 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.server;

 import com.android.common.FastXmlSerializer;
 import com.android.internal.widget.LockPatternUtils;

 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 import org.xmlpull.v1.XmlSerializer;

 import android.app.DeviceAdmin;
 import android.app.DeviceAdminInfo;
 import android.app.DevicePolicyManager;
 import android.app.IDevicePolicyManager;
 import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.os.Binder;
 import android.os.IBinder;
 import android.os.IPowerManager;
 import android.os.PowerManager;
 import android.os.RecoverySystem;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.provider.Settings;
 import android.util.Log;
 import android.util.Xml;

 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.List;

 /**
  * Implementation of the device policy APIs.
  */
 public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {
     private static final String TAG = "DevicePolicyManagerService";

     private final Context mContext;

     IPowerManager mIPowerManager;

     int mActivePasswordMode = DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED;
     int mActivePasswordLength = 0;
     int mFailedPasswordAttempts = 0;

     ActiveAdmin mActiveAdmin;

     static class ActiveAdmin {
         ActiveAdmin(DeviceAdminInfo _info) {
             info = _info;
         }

         final DeviceAdminInfo info;
         int getUid() { return info.getActivityInfo().applicationInfo.uid; }

         int passwordMode = DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED;
         int minimumPasswordLength = 0;
         long maximumTimeToUnlock = 0;
     }

     /**
      * Instantiates the service.
      */
     public DevicePolicyManagerService(Context context) {
         mContext = context;
     }

     private IPowerManager getIPowerManager() {
         if (mIPowerManager == null) {
             IBinder b = ServiceManager.getService(Context.POWER_SERVICE);
             mIPowerManager = IPowerManager.Stub.asInterface(b);
         }
         return mIPowerManager;
     }

     ActiveAdmin getActiveAdminForCallerLocked(ComponentName who) throws SecurityException {
         if (mActiveAdmin != null && mActiveAdmin.getUid() == Binder.getCallingUid()) {
             if (who != null) {
                 if (!who.getPackageName().equals(mActiveAdmin.info.getActivityInfo().packageName)
                         || !who.getClassName().equals(mActiveAdmin.info.getActivityInfo().name)) {
                     throw new SecurityException("Current admin is not " + who);
                 }
             }
             return mActiveAdmin;
         }
         throw new SecurityException("Current admin is not owned by uid " + Binder.getCallingUid());
     }


     void sendAdminCommandLocked(ActiveAdmin policy, String action) {
         Intent intent = new Intent(action);
         intent.setComponent(policy.info.getComponent());
         mContext.sendBroadcast(intent);
     }

     ComponentName getActiveAdminLocked() {
         if (mActiveAdmin != null) {
             return mActiveAdmin.info.getComponent();
         }
         return null;
     }

     void removeActiveAdminLocked(ComponentName adminReceiver) {
         ComponentName cur = getActiveAdminLocked();
         if (cur != null && cur.equals(adminReceiver)) {
             sendAdminCommandLocked(mActiveAdmin,
                     DeviceAdmin.ACTION_DEVICE_ADMIN_DISABLED);
             // XXX need to wait for it to complete.
             mActiveAdmin = null;
         }
     }

     public DeviceAdminInfo findAdmin(ComponentName adminName) {
         Intent resolveIntent = new Intent();
         resolveIntent.setComponent(adminName);
         List<ResolveInfo> infos = mContext.getPackageManager().queryBroadcastReceivers(
                 resolveIntent, PackageManager.GET_META_DATA);
         if (infos == null || infos.size() <= 0) {
             throw new IllegalArgumentException("Unknown admin: " + adminName);
         }

         try {
             return new DeviceAdminInfo(mContext, infos.get(0));
         } catch (XmlPullParserException e) {
             Log.w(TAG, "Bad device admin requested: " + adminName, e);
             return null;
         } catch (IOException e) {
             Log.w(TAG, "Bad device admin requested: " + adminName, e);
             return null;
         }
     }

     private static JournaledFile makeJournaledFile() {
         final String base = "/data/system/device_policies.xml";
         return new JournaledFile(new File(base), new File(base + ".tmp"));
     }

     private void saveSettingsLocked() {
         JournaledFile journal = makeJournaledFile();
         FileOutputStream stream = null;
         try {
             stream = new FileOutputStream(journal.chooseForWrite(), false);
             XmlSerializer out = new FastXmlSerializer();
             out.setOutput(stream, "utf-8");
             out.startDocument(null, true);

             out.startTag(null, "policies");

             ActiveAdmin ap = mActiveAdmin;
             if (ap != null) {
                 out.startTag(null, "admin");
                 out.attribute(null, "name", ap.info.getComponent().flattenToString());
                 if (ap.passwordMode != DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED) {
                     out.startTag(null, "password-mode");
                     out.attribute(null, "value", Integer.toString(ap.passwordMode));
                     out.endTag(null, "password-mode");
                     if (ap.minimumPasswordLength > 0) {
                         out.startTag(null, "min-password-length");
                         out.attribute(null, "value", Integer.toString(ap.minimumPasswordLength));
                         out.endTag(null, "mn-password-length");
                     }
                 }
                 if (ap.maximumTimeToUnlock != DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED) {
                     out.startTag(null, "max-time-to-unlock");
                     out.attribute(null, "value", Long.toString(ap.maximumTimeToUnlock));
                     out.endTag(null, "max-time-to-unlock");
                 }
                 out.endTag(null, "admin");
             }
             out.endTag(null, "policies");

             out.endDocument();
             stream.close();
             journal.commit();
         } catch (IOException e) {
             try {
                 if (stream != null) {
                     stream.close();
                 }
             } catch (IOException ex) {
                 // Ignore
             }
             journal.rollback();
         }
     }

     private void loadSettingsLocked() {
         JournaledFile journal = makeJournaledFile();
         FileInputStream stream = null;
         File file = journal.chooseForRead();
         boolean success = false;
         try {
             stream = new FileInputStream(file);
             XmlPullParser parser = Xml.newPullParser();
             parser.setInput(stream, null);

             int type = parser.next();
             while (type != XmlPullParser.START_TAG) {
                 type = parser.next();
             }
             String tag = parser.getName();
             if ("policies".equals(tag)) {
                 ActiveAdmin ap = null;
                 do {
                     type = parser.next();
                     if (type == XmlPullParser.START_TAG) {
                         tag = parser.getName();
                         if (ap == null) {
                             if ("admin".equals(tag)) {
                                 DeviceAdminInfo dai = findAdmin(
                                         ComponentName.unflattenFromString(
                                                 parser.getAttributeValue(null, "name")));
                                 if (dai != null) {
                                     ap = new ActiveAdmin(dai);
                                 }
                             }
                         } else if ("password-mode".equals(tag)) {
                             ap.passwordMode = Integer.parseInt(
                                     parser.getAttributeValue(null, "value"));
                         } else if ("min-password-length".equals(tag)) {
                             ap.minimumPasswordLength = Integer.parseInt(
                                     parser.getAttributeValue(null, "value"));
                         } else if ("max-time-to-unlock".equals(tag)) {
                             ap.maximumTimeToUnlock = Long.parseLong(
                                     parser.getAttributeValue(null, "value"));
                         }
                     } else if (type == XmlPullParser.END_TAG) {
                         tag = parser.getName();
                         if (ap != null && "admin".equals(tag)) {
                             mActiveAdmin = ap;
                             ap = null;
                         }
                     }
                 } while (type != XmlPullParser.END_DOCUMENT);
                 success = true;
             }
         } catch (NullPointerException e) {
             Log.w(TAG, "failed parsing " + file + " " + e);
         } catch (NumberFormatException e) {
             Log.w(TAG, "failed parsing " + file + " " + e);
         } catch (XmlPullParserException e) {
             Log.w(TAG, "failed parsing " + file + " " + e);
         } catch (IOException e) {
             Log.w(TAG, "failed parsing " + file + " " + e);
         } catch (IndexOutOfBoundsException e) {
             Log.w(TAG, "failed parsing " + file + " " + e);
         }
         try {
             if (stream != null) {
                 stream.close();
             }
         } catch (IOException e) {
             // Ignore
         }

         if (!success) {
             Log.w(TAG, "No valid start tag found in policies file");
         }

         long timeMs = getMaximumTimeToLock();
         if (timeMs <= 0) {
             timeMs = Integer.MAX_VALUE;
         }
         try {
             getIPowerManager().setMaximumScreenOffTimeount((int)timeMs);
         } catch (RemoteException e) {
             Log.w(TAG, "Failure talking with power manager", e);
         }

     }

     public void systemReady() {
         synchronized (this) {
             loadSettingsLocked();
         }
     }

     public void setActiveAdmin(ComponentName adminReceiver) {
         mContext.enforceCallingOrSelfPermission(
                 android.Manifest.permission.BIND_DEVICE_ADMIN, null);

         DeviceAdminInfo info = findAdmin(adminReceiver);
         if (info == null) {
             throw new IllegalArgumentException("Bad admin: " + adminReceiver);
         }
         synchronized (this) {
             long ident = Binder.clearCallingIdentity();
             try {
                 ComponentName cur = getActiveAdminLocked();
                 if (cur != null && cur.equals(adminReceiver)) {
                     throw new IllegalStateException("An admin is already set");
                 }
                 if (cur != null) {
                     removeActiveAdminLocked(adminReceiver);
                 }
                 mActiveAdmin = new ActiveAdmin(info);
                 saveSettingsLocked();
                 sendAdminCommandLocked(mActiveAdmin,
                         DeviceAdmin.ACTION_DEVICE_ADMIN_ENABLED);
             } finally {
                 Binder.restoreCallingIdentity(ident);
             }
         }
     }

     public ComponentName getActiveAdmin() {
         synchronized (this) {
             return getActiveAdminLocked();
         }
     }

     public void removeActiveAdmin(ComponentName adminReceiver) {
         synchronized (this) {
             if (mActiveAdmin == null || mActiveAdmin.getUid() != Binder.getCallingUid()) {
                 mContext.enforceCallingOrSelfPermission(
                         android.Manifest.permission.BIND_DEVICE_ADMIN, null);
             }
             long ident = Binder.clearCallingIdentity();
             try {
                 removeActiveAdminLocked(adminReceiver);
             } finally {
                 Binder.restoreCallingIdentity(ident);
             }
         }
     }

     public void setPasswordMode(ComponentName who, int mode) {
         synchronized (this) {
             if (who == null) {
                 throw new NullPointerException("ComponentName is null");
             }
             ActiveAdmin ap = getActiveAdminForCallerLocked(who);
             if (ap.passwordMode != mode) {
                 ap.passwordMode = mode;
                 saveSettingsLocked();
             }
         }
     }

     public int getPasswordMode() {
         synchronized (this) {
             return mActiveAdmin != null ? mActiveAdmin.passwordMode
                     : DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED;
         }
     }

     public void setMinimumPasswordLength(ComponentName who, int length) {
         synchronized (this) {
             if (who == null) {
                 throw new NullPointerException("ComponentName is null");
             }
             ActiveAdmin ap = getActiveAdminForCallerLocked(who);
             if (ap.minimumPasswordLength != length) {
                 ap.minimumPasswordLength = length;
                 saveSettingsLocked();
             }
         }
     }

     public int getMinimumPasswordLength() {
         synchronized (this) {
             return mActiveAdmin != null ? mActiveAdmin.minimumPasswordLength : 0;
         }
     }

     public boolean isActivePasswordSufficient() {
         synchronized (this) {
             // This API can only be called by an active device admin,
             // so try to retrieve it to check that the caller is one.
             getActiveAdminForCallerLocked(null);
             return mActivePasswordMode >= getPasswordMode()
                     && mActivePasswordLength >= getMinimumPasswordLength();
         }
     }

     public int getCurrentFailedPasswordAttempts() {
         synchronized (this) {
             // This API can only be called by an active device admin,
             // so try to retrieve it to check that the caller is one.
             getActiveAdminForCallerLocked(null);
             return mFailedPasswordAttempts;
         }
     }

     public boolean resetPassword(String password) {
         int mode;
         synchronized (this) {
             // This API can only be called by an active device admin,
             // so try to retrieve it to check that the caller is one.
             getActiveAdminForCallerLocked(null);
             mode = getPasswordMode();
             if (password.length() < getMinimumPasswordLength()) {
                 return false;
             }
         }

         // Don't do this with the lock held, because it is going to call
         // back in to the service.
         long ident = Binder.clearCallingIdentity();
         try {
             LockPatternUtils utils = new LockPatternUtils(mContext);
             utils.saveLockPassword(password, mode);
         } finally {
             Binder.restoreCallingIdentity(ident);
         }

         return true;
     }

     public void setMaximumTimeToLock(ComponentName who, long timeMs) {
         synchronized (this) {
             if (who == null) {
                 throw new NullPointerException("ComponentName is null");
             }
             ActiveAdmin ap = getActiveAdminForCallerLocked(who);
             if (ap.maximumTimeToUnlock != timeMs) {
                 ap.maximumTimeToUnlock = timeMs;

                 long ident = Binder.clearCallingIdentity();
                 try {
                     saveSettingsLocked();
                     if (timeMs <= 0) {
                         timeMs = Integer.MAX_VALUE;
                     }
                     try {
                         getIPowerManager().setMaximumScreenOffTimeount((int)timeMs);
                     } catch (RemoteException e) {
                         Log.w(TAG, "Failure talking with power manager", e);
                     }
                 } finally {
                     Binder.restoreCallingIdentity(ident);
                 }
             }
         }
     }

     public long getMaximumTimeToLock() {
         synchronized (this) {
             return mActiveAdmin != null ? mActiveAdmin.maximumTimeToUnlock : 0;
         }
     }

     public void lockNow() {
         synchronized (this) {
             // This API can only be called by an active device admin,
             // so try to retrieve it to check that the caller is one.
             getActiveAdminForCallerLocked(null);
             // STOPSHIP need to implement.
         }
     }

     public void wipeData(int flags) {
         synchronized (this) {
             // This API can only be called by an active device admin,
             // so try to retrieve it to check that the caller is one.
             getActiveAdminForCallerLocked(null);
         }
         long ident = Binder.clearCallingIdentity();
         try {
             RecoverySystem.rebootWipeUserData(mContext);
         } catch (IOException e) {
             Log.w(TAG, "Failed requesting data wipe", e);
         } finally {
             Binder.restoreCallingIdentity(ident);
         }
     }

     public void setActivePasswordState(int mode, int length) {
         mContext.enforceCallingOrSelfPermission(
                 android.Manifest.permission.BIND_DEVICE_ADMIN, null);

         synchronized (this) {
             if (mActivePasswordMode != mode || mActivePasswordLength != length
                     || mFailedPasswordAttempts != 0) {
                 long ident = Binder.clearCallingIdentity();
                 try {
                     mActivePasswordMode = mode;
                     mActivePasswordLength = length;
                     mFailedPasswordAttempts = 0;
                     sendAdminCommandLocked(mActiveAdmin,
                             DeviceAdmin.ACTION_PASSWORD_CHANGED);
                 } finally {
                     Binder.restoreCallingIdentity(ident);
                 }
             }
         }
     }

     public void reportFailedPasswordAttempt() {
         mContext.enforceCallingOrSelfPermission(
                 android.Manifest.permission.BIND_DEVICE_ADMIN, null);

         synchronized (this) {
             long ident = Binder.clearCallingIdentity();
             try {
                 mFailedPasswordAttempts++;
                 sendAdminCommandLocked(mActiveAdmin,
                         DeviceAdmin.ACTION_PASSWORD_FAILED);
             } finally {
                 Binder.restoreCallingIdentity(ident);
             }
         }
     }

     public void reportSuccessfulPasswordAttempt() {
         mContext.enforceCallingOrSelfPermission(
                 android.Manifest.permission.BIND_DEVICE_ADMIN, null);

         synchronized (this) {
             if (mFailedPasswordAttempts != 0) {
                 long ident = Binder.clearCallingIdentity();
                 try {
                     mFailedPasswordAttempts = 0;
                     sendAdminCommandLocked(mActiveAdmin,
                             DeviceAdmin.ACTION_PASSWORD_SUCCEEDED);
                 } finally {
                     Binder.restoreCallingIdentity(ident);
                 }
             }
         }
     }
 }
	/*
	* Copyright (C) 2010 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.server;

	import com.android.common.FastXmlSerializer;
	import com.android.internal.widget.LockPatternUtils;

	import org.xmlpull.v1.XmlPullParser;
	import org.xmlpull.v1.XmlPullParserException;
	import org.xmlpull.v1.XmlSerializer;

	import android.app.DeviceAdmin;
	import android.app.DeviceAdminInfo;
	import android.app.DevicePolicyManager;
	import android.app.IDevicePolicyManager;
	import android.content.ComponentName;
	import android.content.ContentResolver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.pm.PackageManager;
	import android.content.pm.ResolveInfo;
	import android.os.Binder;
	import android.os.IBinder;
	import android.os.IPowerManager;
	import android.os.PowerManager;
	import android.os.RecoverySystem;
	import android.os.RemoteException;
	import android.os.ServiceManager;
	import android.provider.Settings;
	import android.util.Log;
	import android.util.Xml;

	import java.io.File;
	import java.io.FileInputStream;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.util.List;

	/**
	* Implementation of the device policy APIs.
	*/
	public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {
	private static final String TAG = "DevicePolicyManagerService";

	private final Context mContext;

	IPowerManager mIPowerManager;

	int mActivePasswordMode = DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED;
	int mActivePasswordLength = 0;
	int mFailedPasswordAttempts = 0;

	ActiveAdmin mActiveAdmin;

	static class ActiveAdmin {
	ActiveAdmin(DeviceAdminInfo _info) {
	info = _info;
	}

	final DeviceAdminInfo info;
	int getUid() { return info.getActivityInfo().applicationInfo.uid; }

	int passwordMode = DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED;
	int minimumPasswordLength = 0;
	long maximumTimeToUnlock = 0;
	}

	/**
	* Instantiates the service.
	*/
	public DevicePolicyManagerService(Context context) {
	mContext = context;
	}

	private IPowerManager getIPowerManager() {
	if (mIPowerManager == null) {
	IBinder b = ServiceManager.getService(Context.POWER_SERVICE);
	mIPowerManager = IPowerManager.Stub.asInterface(b);
	}
	return mIPowerManager;
	}

	ActiveAdmin getActiveAdminForCallerLocked(ComponentName who) throws SecurityException {
	if (mActiveAdmin != null && mActiveAdmin.getUid() == Binder.getCallingUid()) {
	if (who != null) {
	if (!who.getPackageName().equals(mActiveAdmin.info.getActivityInfo().packageName)
	\|\| !who.getClassName().equals(mActiveAdmin.info.getActivityInfo().name)) {
	throw new SecurityException("Current admin is not " + who);
	}
	}
	return mActiveAdmin;
	}
	throw new SecurityException("Current admin is not owned by uid " + Binder.getCallingUid());
	}


	void sendAdminCommandLocked(ActiveAdmin policy, String action) {
	Intent intent = new Intent(action);
	intent.setComponent(policy.info.getComponent());
	mContext.sendBroadcast(intent);
	}

	ComponentName getActiveAdminLocked() {
	if (mActiveAdmin != null) {
	return mActiveAdmin.info.getComponent();
	}
	return null;
	}

	void removeActiveAdminLocked(ComponentName adminReceiver) {
	ComponentName cur = getActiveAdminLocked();
	if (cur != null && cur.equals(adminReceiver)) {
	sendAdminCommandLocked(mActiveAdmin,
	DeviceAdmin.ACTION_DEVICE_ADMIN_DISABLED);
	// XXX need to wait for it to complete.
	mActiveAdmin = null;
	}
	}

	public DeviceAdminInfo findAdmin(ComponentName adminName) {
	Intent resolveIntent = new Intent();
	resolveIntent.setComponent(adminName);
	List<ResolveInfo> infos = mContext.getPackageManager().queryBroadcastReceivers(
	resolveIntent, PackageManager.GET_META_DATA);
	if (infos == null \|\| infos.size() <= 0) {
	throw new IllegalArgumentException("Unknown admin: " + adminName);
	}

	try {
	return new DeviceAdminInfo(mContext, infos.get(0));
	} catch (XmlPullParserException e) {
	Log.w(TAG, "Bad device admin requested: " + adminName, e);
	return null;
	} catch (IOException e) {
	Log.w(TAG, "Bad device admin requested: " + adminName, e);
	return null;
	}
	}

	private static JournaledFile makeJournaledFile() {
	final String base = "/data/system/device_policies.xml";
	return new JournaledFile(new File(base), new File(base + ".tmp"));
	}

	private void saveSettingsLocked() {
	JournaledFile journal = makeJournaledFile();
	FileOutputStream stream = null;
	try {
	stream = new FileOutputStream(journal.chooseForWrite(), false);
	XmlSerializer out = new FastXmlSerializer();
	out.setOutput(stream, "utf-8");
	out.startDocument(null, true);

	out.startTag(null, "policies");

	ActiveAdmin ap = mActiveAdmin;
	if (ap != null) {
	out.startTag(null, "admin");
	out.attribute(null, "name", ap.info.getComponent().flattenToString());
	if (ap.passwordMode != DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED) {
	out.startTag(null, "password-mode");
	out.attribute(null, "value", Integer.toString(ap.passwordMode));
	out.endTag(null, "password-mode");
	if (ap.minimumPasswordLength > 0) {
	out.startTag(null, "min-password-length");
	out.attribute(null, "value", Integer.toString(ap.minimumPasswordLength));
	out.endTag(null, "mn-password-length");
	}
	}
	if (ap.maximumTimeToUnlock != DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED) {
	out.startTag(null, "max-time-to-unlock");
	out.attribute(null, "value", Long.toString(ap.maximumTimeToUnlock));
	out.endTag(null, "max-time-to-unlock");
	}
	out.endTag(null, "admin");
	}
	out.endTag(null, "policies");

	out.endDocument();
	stream.close();
	journal.commit();
	} catch (IOException e) {
	try {
	if (stream != null) {
	stream.close();
	}
	} catch (IOException ex) {
	// Ignore
	}
	journal.rollback();
	}
	}

	private void loadSettingsLocked() {
	JournaledFile journal = makeJournaledFile();
	FileInputStream stream = null;
	File file = journal.chooseForRead();
	boolean success = false;
	try {
	stream = new FileInputStream(file);
	XmlPullParser parser = Xml.newPullParser();
	parser.setInput(stream, null);

	int type = parser.next();
	while (type != XmlPullParser.START_TAG) {
	type = parser.next();
	}
	String tag = parser.getName();
	if ("policies".equals(tag)) {
	ActiveAdmin ap = null;
	do {
	type = parser.next();
	if (type == XmlPullParser.START_TAG) {
	tag = parser.getName();
	if (ap == null) {
	if ("admin".equals(tag)) {
	DeviceAdminInfo dai = findAdmin(
	ComponentName.unflattenFromString(
	parser.getAttributeValue(null, "name")));
	if (dai != null) {
	ap = new ActiveAdmin(dai);
	}
	}
	} else if ("password-mode".equals(tag)) {
	ap.passwordMode = Integer.parseInt(
	parser.getAttributeValue(null, "value"));
	} else if ("min-password-length".equals(tag)) {
	ap.minimumPasswordLength = Integer.parseInt(
	parser.getAttributeValue(null, "value"));
	} else if ("max-time-to-unlock".equals(tag)) {
	ap.maximumTimeToUnlock = Long.parseLong(
	parser.getAttributeValue(null, "value"));
	}
	} else if (type == XmlPullParser.END_TAG) {
	tag = parser.getName();
	if (ap != null && "admin".equals(tag)) {
	mActiveAdmin = ap;
	ap = null;
	}
	}
	} while (type != XmlPullParser.END_DOCUMENT);
	success = true;
	}
	} catch (NullPointerException e) {
	Log.w(TAG, "failed parsing " + file + " " + e);
	} catch (NumberFormatException e) {
	Log.w(TAG, "failed parsing " + file + " " + e);
	} catch (XmlPullParserException e) {
	Log.w(TAG, "failed parsing " + file + " " + e);
	} catch (IOException e) {
	Log.w(TAG, "failed parsing " + file + " " + e);
	} catch (IndexOutOfBoundsException e) {
	Log.w(TAG, "failed parsing " + file + " " + e);
	}
	try {
	if (stream != null) {
	stream.close();
	}
	} catch (IOException e) {
	// Ignore
	}

	if (!success) {
	Log.w(TAG, "No valid start tag found in policies file");
	}

	long timeMs = getMaximumTimeToLock();
	if (timeMs <= 0) {
	timeMs = Integer.MAX_VALUE;
	}
	try {
	getIPowerManager().setMaximumScreenOffTimeount((int)timeMs);
	} catch (RemoteException e) {
	Log.w(TAG, "Failure talking with power manager", e);
	}

	}

	public void systemReady() {
	synchronized (this) {
	loadSettingsLocked();
	}
	}

	public void setActiveAdmin(ComponentName adminReceiver) {
	mContext.enforceCallingOrSelfPermission(
	android.Manifest.permission.BIND_DEVICE_ADMIN, null);

	DeviceAdminInfo info = findAdmin(adminReceiver);
	if (info == null) {
	throw new IllegalArgumentException("Bad admin: " + adminReceiver);
	}
	synchronized (this) {
	long ident = Binder.clearCallingIdentity();
	try {
	ComponentName cur = getActiveAdminLocked();
	if (cur != null && cur.equals(adminReceiver)) {
	throw new IllegalStateException("An admin is already set");
	}
	if (cur != null) {
	removeActiveAdminLocked(adminReceiver);
	}
	mActiveAdmin = new ActiveAdmin(info);
	saveSettingsLocked();
	sendAdminCommandLocked(mActiveAdmin,
	DeviceAdmin.ACTION_DEVICE_ADMIN_ENABLED);
	} finally {
	Binder.restoreCallingIdentity(ident);
	}
	}
	}

	public ComponentName getActiveAdmin() {
	synchronized (this) {
	return getActiveAdminLocked();
	}
	}

	public void removeActiveAdmin(ComponentName adminReceiver) {
	synchronized (this) {
	if (mActiveAdmin == null \|\| mActiveAdmin.getUid() != Binder.getCallingUid()) {
	mContext.enforceCallingOrSelfPermission(
	android.Manifest.permission.BIND_DEVICE_ADMIN, null);
	}
	long ident = Binder.clearCallingIdentity();
	try {
	removeActiveAdminLocked(adminReceiver);
	} finally {
	Binder.restoreCallingIdentity(ident);
	}
	}
	}

	public void setPasswordMode(ComponentName who, int mode) {
	synchronized (this) {
	if (who == null) {
	throw new NullPointerException("ComponentName is null");
	}
	ActiveAdmin ap = getActiveAdminForCallerLocked(who);
	if (ap.passwordMode != mode) {
	ap.passwordMode = mode;
	saveSettingsLocked();
	}
	}
	}

	public int getPasswordMode() {
	synchronized (this) {
	return mActiveAdmin != null ? mActiveAdmin.passwordMode
	: DevicePolicyManager.PASSWORD_MODE_UNSPECIFIED;
	}
	}

	public void setMinimumPasswordLength(ComponentName who, int length) {
	synchronized (this) {
	if (who == null) {
	throw new NullPointerException("ComponentName is null");
	}
	ActiveAdmin ap = getActiveAdminForCallerLocked(who);
	if (ap.minimumPasswordLength != length) {
	ap.minimumPasswordLength = length;
	saveSettingsLocked();
	}
	}
	}

	public int getMinimumPasswordLength() {
	synchronized (this) {
	return mActiveAdmin != null ? mActiveAdmin.minimumPasswordLength : 0;
	}
	}

	public boolean isActivePasswordSufficient() {
	synchronized (this) {
	// This API can only be called by an active device admin,
	// so try to retrieve it to check that the caller is one.
	getActiveAdminForCallerLocked(null);
	return mActivePasswordMode >= getPasswordMode()
	&& mActivePasswordLength >= getMinimumPasswordLength();
	}
	}

	public int getCurrentFailedPasswordAttempts() {
	synchronized (this) {
	// This API can only be called by an active device admin,
	// so try to retrieve it to check that the caller is one.
	getActiveAdminForCallerLocked(null);
	return mFailedPasswordAttempts;
	}
	}

	public boolean resetPassword(String password) {
	int mode;
	synchronized (this) {
	// This API can only be called by an active device admin,
	// so try to retrieve it to check that the caller is one.
	getActiveAdminForCallerLocked(null);
	mode = getPasswordMode();
	if (password.length() < getMinimumPasswordLength()) {
	return false;
	}
	}

	// Don't do this with the lock held, because it is going to call
	// back in to the service.
	long ident = Binder.clearCallingIdentity();
	try {
	LockPatternUtils utils = new LockPatternUtils(mContext);
	utils.saveLockPassword(password, mode);
	} finally {
	Binder.restoreCallingIdentity(ident);
	}

	return true;
	}

	public void setMaximumTimeToLock(ComponentName who, long timeMs) {
	synchronized (this) {
	if (who == null) {
	throw new NullPointerException("ComponentName is null");
	}
	ActiveAdmin ap = getActiveAdminForCallerLocked(who);
	if (ap.maximumTimeToUnlock != timeMs) {
	ap.maximumTimeToUnlock = timeMs;

	long ident = Binder.clearCallingIdentity();
	try {
	saveSettingsLocked();
	if (timeMs <= 0) {
	timeMs = Integer.MAX_VALUE;
	}
	try {
	getIPowerManager().setMaximumScreenOffTimeount((int)timeMs);
	} catch (RemoteException e) {
	Log.w(TAG, "Failure talking with power manager", e);
	}
	} finally {
	Binder.restoreCallingIdentity(ident);
	}
	}
	}
	}

	public long getMaximumTimeToLock() {
	synchronized (this) {
	return mActiveAdmin != null ? mActiveAdmin.maximumTimeToUnlock : 0;
	}
	}

	public void lockNow() {
	synchronized (this) {
	// This API can only be called by an active device admin,
	// so try to retrieve it to check that the caller is one.
	getActiveAdminForCallerLocked(null);
	// STOPSHIP need to implement.
	}
	}

	public void wipeData(int flags) {
	synchronized (this) {
	// This API can only be called by an active device admin,
	// so try to retrieve it to check that the caller is one.
	getActiveAdminForCallerLocked(null);
	}
	long ident = Binder.clearCallingIdentity();
	try {
	RecoverySystem.rebootWipeUserData(mContext);
	} catch (IOException e) {
	Log.w(TAG, "Failed requesting data wipe", e);
	} finally {
	Binder.restoreCallingIdentity(ident);
	}
	}

	public void setActivePasswordState(int mode, int length) {
	mContext.enforceCallingOrSelfPermission(
	android.Manifest.permission.BIND_DEVICE_ADMIN, null);

	synchronized (this) {
	if (mActivePasswordMode != mode \|\| mActivePasswordLength != length
	\|\| mFailedPasswordAttempts != 0) {
	long ident = Binder.clearCallingIdentity();
	try {
	mActivePasswordMode = mode;
	mActivePasswordLength = length;
	mFailedPasswordAttempts = 0;
	sendAdminCommandLocked(mActiveAdmin,
	DeviceAdmin.ACTION_PASSWORD_CHANGED);
	} finally {
	Binder.restoreCallingIdentity(ident);
	}
	}
	}
	}

	public void reportFailedPasswordAttempt() {
	mContext.enforceCallingOrSelfPermission(
	android.Manifest.permission.BIND_DEVICE_ADMIN, null);

	synchronized (this) {
	long ident = Binder.clearCallingIdentity();
	try {
	mFailedPasswordAttempts++;
	sendAdminCommandLocked(mActiveAdmin,
	DeviceAdmin.ACTION_PASSWORD_FAILED);
	} finally {
	Binder.restoreCallingIdentity(ident);
	}
	}
	}

	public void reportSuccessfulPasswordAttempt() {
	mContext.enforceCallingOrSelfPermission(
	android.Manifest.permission.BIND_DEVICE_ADMIN, null);

	synchronized (this) {
	if (mFailedPasswordAttempts != 0) {
	long ident = Binder.clearCallingIdentity();
	try {
	mFailedPasswordAttempts = 0;
	sendAdminCommandLocked(mActiveAdmin,
	DeviceAdmin.ACTION_PASSWORD_SUCCEEDED);
	} finally {
	Binder.restoreCallingIdentity(ident);
	}
	}
	}
	}
	}