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 mHasChallenge; 46 protected long mChallenge; 47 protected boolean mWasSecureBefore; 48 protected int mUserId; 49 protected int mUnificationProfileId = UserHandle.USER_NULL; 50 protected LockscreenCredential mUnificationProfileCredential; 51 52 private boolean mBlocking; 53 54 @Override onCreate(Bundle savedInstanceState)55 public void onCreate(Bundle savedInstanceState) { 56 super.onCreate(savedInstanceState); 57 setRetainInstance(true); 58 } 59 setListener(Listener listener)60 public void setListener(Listener listener) { 61 if (mListener == listener) { 62 return; 63 } 64 65 mListener = listener; 66 if (mFinished && mListener != null) { 67 mListener.onChosenLockSaveFinished(mWasSecureBefore, mResultData); 68 } 69 } 70 prepare(LockPatternUtils utils, boolean credentialRequired, boolean hasChallenge, long challenge, int userId)71 protected void prepare(LockPatternUtils utils, boolean credentialRequired, 72 boolean hasChallenge, long challenge, int userId) { 73 mUtils = utils; 74 mUserId = userId; 75 76 mHasChallenge = hasChallenge; 77 mChallenge = challenge; 78 // This will be a no-op for non managed profiles. 79 mWasSecureBefore = mUtils.isSecure(mUserId); 80 81 Context context = getContext(); 82 // If context is null, we're being invoked to change the setCredentialRequiredToDecrypt, 83 // and we made sure that this is the primary user already. 84 if (context == null || UserManager.get(context).getUserInfo(mUserId).isPrimary()) { 85 mUtils.setCredentialRequiredToDecrypt(credentialRequired); 86 } 87 88 mFinished = false; 89 mResultData = null; 90 } 91 start()92 protected void start() { 93 if (mBlocking) { 94 finish(saveAndVerifyInBackground().second); 95 } else { 96 new Task().execute(); 97 } 98 } 99 100 /** 101 * Executes the save and verify work in background. 102 * @return pair where the first is a boolean confirming whether the change was successful or not 103 * and second is the Intent which has the challenge token or is null. 104 */ saveAndVerifyInBackground()105 protected abstract Pair<Boolean, Intent> saveAndVerifyInBackground(); 106 finish(Intent resultData)107 protected void finish(Intent resultData) { 108 mFinished = true; 109 mResultData = resultData; 110 if (mListener != null) { 111 mListener.onChosenLockSaveFinished(mWasSecureBefore, mResultData); 112 } 113 if (mUnificationProfileCredential != null) { 114 mUnificationProfileCredential.zeroize(); 115 } 116 } 117 setBlocking(boolean blocking)118 public void setBlocking(boolean blocking) { 119 mBlocking = blocking; 120 } 121 setProfileToUnify(int profileId, LockscreenCredential credential)122 public void setProfileToUnify(int profileId, LockscreenCredential credential) { 123 mUnificationProfileId = profileId; 124 mUnificationProfileCredential = credential.duplicate(); 125 } 126 unifyProfileCredentialIfRequested()127 protected void unifyProfileCredentialIfRequested() { 128 if (mUnificationProfileId != UserHandle.USER_NULL) { 129 mUtils.setSeparateProfileChallengeEnabled(mUnificationProfileId, false, 130 mUnificationProfileCredential); 131 } 132 } 133 134 private class Task extends AsyncTask<Void, Void, Pair<Boolean, Intent>> { 135 136 @Override doInBackground(Void... params)137 protected Pair<Boolean, Intent> doInBackground(Void... params){ 138 return saveAndVerifyInBackground(); 139 } 140 141 @Override onPostExecute(Pair<Boolean, Intent> resultData)142 protected void onPostExecute(Pair<Boolean, Intent> resultData) { 143 if (!resultData.first) { 144 Toast.makeText(getContext(), R.string.lockpassword_credential_changed, 145 Toast.LENGTH_LONG).show(); 146 } 147 finish(resultData.second); 148 } 149 } 150 151 interface Listener { onChosenLockSaveFinished(boolean wasSecureBefore, Intent resultData)152 void onChosenLockSaveFinished(boolean wasSecureBefore, Intent resultData); 153 } 154 } 155