Craig Mautner | 5642a48 | 2012-08-23 12:16:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.wm; |
| 18 | |
Amith Yamasani | 599dd7c | 2012-09-14 23:20:08 -0700 | [diff] [blame] | 19 | import android.app.ActivityManagerNative; |
Craig Mautner | 5642a48 | 2012-08-23 12:16:53 -0700 | [diff] [blame] | 20 | import android.app.admin.DevicePolicyManager; |
| 21 | import android.content.Context; |
| 22 | import android.os.Handler; |
| 23 | import android.os.IBinder; |
| 24 | import android.os.Message; |
Amith Yamasani | 599dd7c | 2012-09-14 23:20:08 -0700 | [diff] [blame] | 25 | import android.os.RemoteException; |
Craig Mautner | 5642a48 | 2012-08-23 12:16:53 -0700 | [diff] [blame] | 26 | import android.os.TokenWatcher; |
Amith Yamasani | 599dd7c | 2012-09-14 23:20:08 -0700 | [diff] [blame] | 27 | import android.os.UserHandle; |
Craig Mautner | 5642a48 | 2012-08-23 12:16:53 -0700 | [diff] [blame] | 28 | import android.util.Log; |
| 29 | import android.util.Pair; |
| 30 | import android.view.WindowManagerPolicy; |
| 31 | |
| 32 | public class KeyguardDisableHandler extends Handler { |
| 33 | private static final String TAG = "KeyguardDisableHandler"; |
| 34 | |
| 35 | private static final int ALLOW_DISABLE_YES = 1; |
| 36 | private static final int ALLOW_DISABLE_NO = 0; |
| 37 | private static final int ALLOW_DISABLE_UNKNOWN = -1; // check with DevicePolicyManager |
| 38 | private int mAllowDisableKeyguard = ALLOW_DISABLE_UNKNOWN; // sync'd by mKeyguardTokenWatcher |
| 39 | |
| 40 | // Message.what constants |
| 41 | static final int KEYGUARD_DISABLE = 1; |
| 42 | static final int KEYGUARD_REENABLE = 2; |
| 43 | static final int KEYGUARD_POLICY_CHANGED = 3; |
| 44 | |
| 45 | final Context mContext; |
| 46 | final WindowManagerPolicy mPolicy; |
| 47 | KeyguardTokenWatcher mKeyguardTokenWatcher; |
| 48 | |
| 49 | public KeyguardDisableHandler(final Context context, final WindowManagerPolicy policy) { |
| 50 | mContext = context; |
| 51 | mPolicy = policy; |
| 52 | } |
| 53 | |
| 54 | @SuppressWarnings("unchecked") |
| 55 | @Override |
| 56 | public void handleMessage(Message msg) { |
| 57 | if (mKeyguardTokenWatcher == null) { |
| 58 | mKeyguardTokenWatcher = new KeyguardTokenWatcher(this); |
| 59 | } |
| 60 | |
| 61 | switch (msg.what) { |
| 62 | case KEYGUARD_DISABLE: |
| 63 | final Pair<IBinder, String> pair = (Pair<IBinder, String>)msg.obj; |
| 64 | mKeyguardTokenWatcher.acquire(pair.first, pair.second); |
| 65 | break; |
| 66 | |
| 67 | case KEYGUARD_REENABLE: |
| 68 | mKeyguardTokenWatcher.release((IBinder)msg.obj); |
| 69 | break; |
| 70 | |
| 71 | case KEYGUARD_POLICY_CHANGED: |
| 72 | mPolicy.enableKeyguard(true); |
| 73 | // lazily evaluate this next time we're asked to disable keyguard |
| 74 | mAllowDisableKeyguard = ALLOW_DISABLE_UNKNOWN; |
| 75 | break; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | class KeyguardTokenWatcher extends TokenWatcher { |
| 80 | |
| 81 | public KeyguardTokenWatcher(final Handler handler) { |
| 82 | super(handler, TAG); |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public void acquired() { |
| 87 | // We fail safe and prevent disabling keyguard in the unlikely event this gets |
| 88 | // called before DevicePolicyManagerService has started. |
| 89 | if (mAllowDisableKeyguard == ALLOW_DISABLE_UNKNOWN) { |
| 90 | DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( |
| 91 | Context.DEVICE_POLICY_SERVICE); |
| 92 | if (dpm != null) { |
Amith Yamasani | 599dd7c | 2012-09-14 23:20:08 -0700 | [diff] [blame] | 93 | try { |
| 94 | mAllowDisableKeyguard = dpm.getPasswordQuality(null, |
| 95 | ActivityManagerNative.getDefault().getCurrentUser().id) |
| 96 | == DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED ? |
| 97 | ALLOW_DISABLE_YES : ALLOW_DISABLE_NO; |
| 98 | } catch (RemoteException re) { |
| 99 | // Nothing much we can do |
| 100 | } |
Craig Mautner | 5642a48 | 2012-08-23 12:16:53 -0700 | [diff] [blame] | 101 | } |
| 102 | } |
| 103 | if (mAllowDisableKeyguard == ALLOW_DISABLE_YES) { |
| 104 | mPolicy.enableKeyguard(false); |
| 105 | } else { |
| 106 | Log.v(TAG, "Not disabling keyguard since device policy is enforced"); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | @Override |
| 111 | public void released() { |
| 112 | mPolicy.enableKeyguard(true); |
| 113 | } |
| 114 | } |
| 115 | } |