1 /* 2 * Copyright (C) 2015 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.settings.password; 18 19 import android.content.Context; 20 import android.content.Intent; 21 import android.os.AsyncTask; 22 import android.os.Bundle; 23 import android.os.UserHandle; 24 import android.os.UserManager; 25 import android.util.Pair; 26 import android.widget.Toast; 27 28 import androidx.fragment.app.Fragment; 29 30 import com.android.internal.widget.LockPatternUtils; 31 import com.android.internal.widget.LockscreenCredential; 32 import com.android.settings.R; 33 34 /** 35 * An invisible retained worker fragment to track the AsyncWork that saves (and optionally 36 * verifies if a challenge is given) the chosen lock credential (pattern/pin/password). 37 */ 38 abstract class SaveChosenLockWorkerBase extends Fragment { 39 40 private Listener mListener; 41 private boolean mFinished; 42 private Intent mResultData; 43 44 protected LockPatternUtils mUtils; 45 protected boolean mRequestGatekeeperPassword; 46 protected boolean mWasSecureBefore; 47 protected int mUserId; 48 protected int mUnificationProfileId = UserHandle.USER_NULL; 49 protected LockscreenCredential mUnificationProfileCredential; 50 51 private boolean mBlocking; 52 53 @Override onCreate(Bundle savedInstanceState)54 public void onCreate(Bundle savedInstanceState) { 55 super.onCreate(savedInstanceState); 56 setRetainInstance(true); 57 } 58 setListener(Listener listener)59 public void setListener(Listener listener) { 60 if (mListener == listener) { 61 return; 62 } 63 64 mListener = listener; 65 if (mFinished && mListener != null) { 66 mListener.onChosenLockSaveFinished(mWasSecureBefore, mResultData); 67 } 68 } 69 prepare(LockPatternUtils utils, boolean credentialRequired, boolean requestGatekeeperPassword, int userId)70 protected void prepare(LockPatternUtils utils, boolean credentialRequired, 71 boolean requestGatekeeperPassword, int userId) { 72 mUtils = utils; 73 mUserId = userId; 74 mRequestGatekeeperPassword = requestGatekeeperPassword; 75 // This will be a no-op for non managed profiles. 76 mWasSecureBefore = mUtils.isSecure(mUserId); 77 78 Context context = getContext(); 79 // If context is null, we're being invoked to change the setCredentialRequiredToDecrypt, 80 // and we made sure that this is the primary user already. 81 if (context == null || UserManager.get(context).getUserInfo(mUserId).isPrimary()) { 82 mUtils.setCredentialRequiredToDecrypt(credentialRequired); 83 } 84 85 mFinished = false; 86 mResultData = null; 87 } 88 start()89 protected void start() { 90 if (mBlocking) { 91 finish(saveAndVerifyInBackground().second); 92 } else { 93 new Task().execute(); 94 } 95 } 96 97 /** 98 * Executes the save and verify work in background. 99 * @return pair where the first is a boolean confirming whether the change was successful or not 100 * and second is the Intent which has the challenge token or is null. 101 */ saveAndVerifyInBackground()102 protected abstract Pair<Boolean, Intent> saveAndVerifyInBackground(); 103 finish(Intent resultData)104 protected void finish(Intent resultData) { 105 mFinished = true; 106 mResultData = resultData; 107 if (mListener != null) { 108 mListener.onChosenLockSaveFinished(mWasSecureBefore, mResultData); 109 } 110 if (mUnificationProfileCredential != null) { 111 mUnificationProfileCredential.zeroize(); 112 } 113 } 114 setBlocking(boolean blocking)115 public void setBlocking(boolean blocking) { 116 mBlocking = blocking; 117 } 118 setProfileToUnify(int profileId, LockscreenCredential credential)119 public void setProfileToUnify(int profileId, LockscreenCredential credential) { 120 mUnificationProfileId = profileId; 121 mUnificationProfileCredential = credential.duplicate(); 122 } 123 unifyProfileCredentialIfRequested()124 protected void unifyProfileCredentialIfRequested() { 125 if (mUnificationProfileId != UserHandle.USER_NULL) { 126 mUtils.setSeparateProfileChallengeEnabled(mUnificationProfileId, false, 127 mUnificationProfileCredential); 128 } 129 } 130 131 private class Task extends AsyncTask<Void, Void, Pair<Boolean, Intent>> { 132 133 @Override doInBackground(Void... params)134 protected Pair<Boolean, Intent> doInBackground(Void... params){ 135 return saveAndVerifyInBackground(); 136 } 137 138 @Override onPostExecute(Pair<Boolean, Intent> resultData)139 protected void onPostExecute(Pair<Boolean, Intent> resultData) { 140 if (!resultData.first) { 141 Toast.makeText(getContext(), R.string.lockpassword_credential_changed, 142 Toast.LENGTH_LONG).show(); 143 } 144 finish(resultData.second); 145 } 146 } 147 148 interface Listener { onChosenLockSaveFinished(boolean wasSecureBefore, Intent resultData)149 void onChosenLockSaveFinished(boolean wasSecureBefore, Intent resultData); 150 } 151 } 152