| /* |
| * Copyright (C) 2017 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.settings.widget; |
| |
| import android.app.AlertDialog; |
| import android.app.Dialog; |
| import android.app.DialogFragment; |
| import android.app.Fragment; |
| import android.content.Context; |
| import android.content.DialogInterface; |
| import android.content.res.TypedArray; |
| import android.os.Bundle; |
| import android.text.Editable; |
| import android.text.InputType; |
| import android.text.TextUtils; |
| import android.text.TextWatcher; |
| import android.util.Log; |
| import android.view.inputmethod.InputMethodManager; |
| import android.widget.Button; |
| import android.widget.EditText; |
| |
| import com.android.internal.util.HexDump; |
| import com.android.settings.R; |
| |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| |
| public class CarrierDemoPasswordDialogFragment extends DialogFragment { |
| |
| private static final String TAG = "CarrierDemoPasswordDialogFragment"; |
| |
| private MessageDigest mMessageDigest; |
| |
| public CarrierDemoPasswordDialogFragment() { |
| try { |
| mMessageDigest = MessageDigest.getInstance("SHA-256"); |
| } catch (NoSuchAlgorithmException e) { |
| Log.e(TAG, "Unable to verify demo mode password", e); |
| } |
| } |
| |
| @Override |
| public Dialog onCreateDialog(Bundle savedInstanceState) { |
| final AlertDialog dialog = new AlertDialog.Builder(getContext()) |
| .setPositiveButton(R.string.retail_demo_reset_next, |
| new DialogInterface.OnClickListener() { |
| @Override |
| public void onClick(DialogInterface dialog, int which) { |
| final Fragment parentFragment = getParentFragment(); |
| if (parentFragment instanceof Callback |
| && which == DialogInterface.BUTTON_POSITIVE) { |
| ((Callback) parentFragment).onPasswordVerified(); |
| } |
| } |
| }) |
| .setNegativeButton(android.R.string.cancel, null) |
| .setMessage(R.string.retail_demo_reset_message) |
| .setTitle(R.string.retail_demo_reset_title) |
| .create(); |
| |
| final Context context = dialog.getContext(); |
| final EditText passwordField = new EditText(context); |
| passwordField.setSingleLine(); |
| passwordField.setInputType(InputType.TYPE_CLASS_TEXT |
| | InputType.TYPE_TEXT_VARIATION_PASSWORD); |
| passwordField.addTextChangedListener(new TextWatcher() { |
| @Override |
| public void beforeTextChanged(CharSequence s, int start, int count, int after) { |
| // no-op |
| } |
| |
| @Override |
| public void onTextChanged(CharSequence s, int start, int before, int count) { |
| verifyPassword(dialog, passwordField.getText().toString()); |
| } |
| |
| @Override |
| public void afterTextChanged(Editable s) { |
| // no-op |
| } |
| }); |
| |
| dialog.setOnShowListener(new DialogInterface.OnShowListener() { |
| @Override |
| public void onShow(DialogInterface dialogInterface) { |
| verifyPassword(dialog, passwordField.getText().toString()); |
| passwordField.requestFocus(); |
| final InputMethodManager imm = (InputMethodManager) getContext().getSystemService( |
| Context.INPUT_METHOD_SERVICE); |
| imm.showSoftInput(passwordField, InputMethodManager.SHOW_IMPLICIT); |
| } |
| }); |
| dialog.setCanceledOnTouchOutside(false); |
| |
| final TypedArray a = context.obtainStyledAttributes( |
| new int[] { android.R.attr.dialogPreferredPadding }); |
| final int sidePadding = a.getDimensionPixelSize(0, 0); |
| dialog.setView(passwordField, sidePadding, 0, sidePadding, 0); |
| a.recycle(); |
| |
| return dialog; |
| } |
| |
| private void verifyPassword(AlertDialog dialog, String input) { |
| final Button positiveButton = dialog.getButton(DialogInterface.BUTTON_POSITIVE); |
| if (mMessageDigest == null || TextUtils.isEmpty(input)) { |
| positiveButton.setEnabled(false); |
| return; |
| } |
| final String passwordHash = getContext().getString( |
| com.android.internal.R.string.config_carrierDemoModePassword); |
| if (passwordHash == null || TextUtils.isEmpty(passwordHash)) { |
| // This device does not support carrier demo mode. |
| return; |
| } |
| final byte[] inputDigest = mMessageDigest.digest(input.getBytes()); |
| final String inputHash = HexDump.toHexString(inputDigest, 0, inputDigest.length, false); |
| positiveButton.setEnabled(TextUtils.equals(passwordHash, inputHash)); |
| } |
| |
| public interface Callback { |
| void onPasswordVerified(); |
| } |
| } |