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      1 /*
      2  * Copyright (C) 2016 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 static com.android.internal.util.Preconditions.checkNotNull;
     20 
     21 import android.annotation.Nullable;
     22 import android.app.admin.DevicePolicyManager;
     23 import android.content.Context;
     24 import android.content.Intent;
     25 import android.content.pm.PackageManager;
     26 import android.hardware.fingerprint.FingerprintManager;
     27 import android.os.Bundle;
     28 import android.os.UserHandle;
     29 
     30 import com.android.internal.annotations.VisibleForTesting;
     31 import com.android.settings.ChooseLockGeneric;
     32 import com.android.settings.ChooseLockSettingsHelper;
     33 
     34 /**
     35  * Business logic for {@link SetNewPasswordActivity}.
     36  *
     37  * <p>On devices that supports fingerprint, this controller directs the user to configure
     38  * fingerprint + a backup password if the device admin allows fingerprint for keyguard and
     39  * the user has never configured a fingerprint before.
     40  */
     41 final class SetNewPasswordController {
     42 
     43     interface Ui {
     44         /** Starts the {@link ChooseLockGeneric} activity with the given extras. */
     45         void launchChooseLock(@Nullable Bundle chooseLockFingerprintExtras);
     46     }
     47 
     48     private final int mCurrentUserId;
     49     private final PackageManager mPackageManager;
     50     @Nullable private final FingerprintManager mFingerprintManager;
     51     private final DevicePolicyManager mDevicePolicyManager;
     52     private final Ui mUi;
     53 
     54     public SetNewPasswordController(Context context, Ui ui) {
     55         this(context.getUserId(),
     56                 context.getPackageManager(),
     57                 (FingerprintManager) context.getSystemService(Context.FINGERPRINT_SERVICE),
     58                 (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE),
     59                 ui);
     60     }
     61 
     62     @VisibleForTesting
     63     SetNewPasswordController(
     64             int currentUserId,
     65             PackageManager packageManager,
     66             FingerprintManager fingerprintManager,
     67             DevicePolicyManager devicePolicyManager,
     68             Ui ui) {
     69         mCurrentUserId = currentUserId;
     70         mPackageManager = checkNotNull(packageManager);
     71         mFingerprintManager = fingerprintManager;
     72         mDevicePolicyManager = checkNotNull(devicePolicyManager);
     73         mUi = checkNotNull(ui);
     74     }
     75 
     76     /**
     77      * Dispatches the set new password intent to the correct activity that handles it.
     78      */
     79     public void dispatchSetNewPasswordIntent() {
     80         if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT)
     81                 && mFingerprintManager != null
     82                 && mFingerprintManager.isHardwareDetected()
     83                 && !mFingerprintManager.hasEnrolledFingerprints()
     84                 && !isFingerprintDisabledByAdmin()) {
     85             mUi.launchChooseLock(getFingerprintChooseLockExtras());
     86         } else {
     87             mUi.launchChooseLock(null);
     88         }
     89     }
     90 
     91     private Bundle getFingerprintChooseLockExtras() {
     92         Bundle chooseLockExtras = new Bundle();
     93         if (mFingerprintManager != null) {
     94             long challenge = mFingerprintManager.preEnroll();
     95             chooseLockExtras.putInt(ChooseLockGeneric.ChooseLockGenericFragment.MINIMUM_QUALITY_KEY,
     96                     DevicePolicyManager.PASSWORD_QUALITY_SOMETHING);
     97             chooseLockExtras.putBoolean(
     98                     ChooseLockGeneric.ChooseLockGenericFragment.HIDE_DISABLED_PREFS, true);
     99             chooseLockExtras.putBoolean(ChooseLockSettingsHelper.EXTRA_KEY_HAS_CHALLENGE, true);
    100             chooseLockExtras.putLong(ChooseLockSettingsHelper.EXTRA_KEY_CHALLENGE, challenge);
    101             chooseLockExtras.putBoolean(ChooseLockSettingsHelper.EXTRA_KEY_FOR_FINGERPRINT, true);
    102             if (mCurrentUserId != UserHandle.USER_NULL) {
    103                 chooseLockExtras.putInt(Intent.EXTRA_USER_ID, mCurrentUserId);
    104             }
    105         }
    106         return chooseLockExtras;
    107     }
    108 
    109     private boolean isFingerprintDisabledByAdmin() {
    110         int disabledFeatures = mDevicePolicyManager.getKeyguardDisabledFeatures(
    111                 null, mCurrentUserId);
    112         return (disabledFeatures & DevicePolicyManager.KEYGUARD_DISABLE_FINGERPRINT) != 0;
    113     }
    114 }
    115