1 /* 2 * Copyright (C) 2019 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.systemui.biometrics; 18 19 import static android.Manifest.permission.USE_BIOMETRIC_INTERNAL; 20 import static android.hardware.biometrics.BiometricManager.Authenticators; 21 import static android.view.accessibility.AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE; 22 23 import android.annotation.IntDef; 24 import android.annotation.NonNull; 25 import android.annotation.Nullable; 26 import android.app.admin.DevicePolicyManager; 27 import android.content.Context; 28 import android.content.pm.PackageManager; 29 import android.hardware.biometrics.PromptInfo; 30 import android.hardware.biometrics.SensorPropertiesInternal; 31 import android.os.UserManager; 32 import android.util.DisplayMetrics; 33 import android.view.ViewGroup; 34 import android.view.accessibility.AccessibilityEvent; 35 import android.view.accessibility.AccessibilityManager; 36 37 import com.android.internal.widget.LockPatternUtils; 38 39 import java.lang.annotation.Retention; 40 import java.lang.annotation.RetentionPolicy; 41 import java.util.List; 42 43 public class Utils { 44 45 public static final int CREDENTIAL_PIN = 1; 46 public static final int CREDENTIAL_PATTERN = 2; 47 public static final int CREDENTIAL_PASSWORD = 3; 48 49 @Retention(RetentionPolicy.SOURCE) 50 @IntDef({CREDENTIAL_PIN, CREDENTIAL_PATTERN, CREDENTIAL_PASSWORD}) 51 @interface CredentialType {} 52 dpToPixels(Context context, float dp)53 static float dpToPixels(Context context, float dp) { 54 return dp * ((float) context.getResources().getDisplayMetrics().densityDpi 55 / DisplayMetrics.DENSITY_DEFAULT); 56 } 57 pixelsToDp(Context context, float pixels)58 static float pixelsToDp(Context context, float pixels) { 59 return pixels / ((float) context.getResources().getDisplayMetrics().densityDpi 60 / DisplayMetrics.DENSITY_DEFAULT); 61 } 62 notifyAccessibilityContentChanged(AccessibilityManager am, ViewGroup view)63 static void notifyAccessibilityContentChanged(AccessibilityManager am, ViewGroup view) { 64 if (!am.isEnabled()) { 65 return; 66 } 67 AccessibilityEvent event = AccessibilityEvent.obtain(); 68 event.setEventType(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED); 69 event.setContentChangeTypes(CONTENT_CHANGE_TYPE_SUBTREE); 70 view.sendAccessibilityEventUnchecked(event); 71 view.notifySubtreeAccessibilityStateChanged(view, view, CONTENT_CHANGE_TYPE_SUBTREE); 72 } 73 isDeviceCredentialAllowed(PromptInfo promptInfo)74 static boolean isDeviceCredentialAllowed(PromptInfo promptInfo) { 75 @Authenticators.Types final int authenticators = promptInfo.getAuthenticators(); 76 return (authenticators & Authenticators.DEVICE_CREDENTIAL) != 0; 77 } 78 isBiometricAllowed(PromptInfo promptInfo)79 static boolean isBiometricAllowed(PromptInfo promptInfo) { 80 @Authenticators.Types final int authenticators = promptInfo.getAuthenticators(); 81 return (authenticators & Authenticators.BIOMETRIC_WEAK) != 0; 82 } 83 getCredentialType(Context context, int userId)84 static @CredentialType int getCredentialType(Context context, int userId) { 85 final LockPatternUtils lpu = new LockPatternUtils(context); 86 switch (lpu.getKeyguardStoredPasswordQuality(userId)) { 87 case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING: 88 return CREDENTIAL_PATTERN; 89 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC: 90 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX: 91 return CREDENTIAL_PIN; 92 case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC: 93 case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC: 94 case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX: 95 case DevicePolicyManager.PASSWORD_QUALITY_MANAGED: 96 return CREDENTIAL_PASSWORD; 97 default: 98 return CREDENTIAL_PASSWORD; 99 } 100 } 101 isManagedProfile(Context context, int userId)102 static boolean isManagedProfile(Context context, int userId) { 103 final UserManager userManager = context.getSystemService(UserManager.class); 104 return userManager.isManagedProfile(userId); 105 } 106 containsSensorId(@ullable List<? extends SensorPropertiesInternal> properties, int sensorId)107 static boolean containsSensorId(@Nullable List<? extends SensorPropertiesInternal> properties, 108 int sensorId) { 109 if (properties == null) { 110 return false; 111 } 112 113 for (SensorPropertiesInternal prop : properties) { 114 if (prop.sensorId == sensorId) { 115 return true; 116 } 117 } 118 119 return false; 120 } 121 isSystem(@onNull Context context, @Nullable String clientPackage)122 static boolean isSystem(@NonNull Context context, @Nullable String clientPackage) { 123 final boolean hasPermission = context.checkCallingOrSelfPermission(USE_BIOMETRIC_INTERNAL) 124 == PackageManager.PERMISSION_GRANTED; 125 return hasPermission && "android".equals(clientPackage); 126 } 127 } 128