1/* 2 * Copyright (C) 2014 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 17package com.android.settings; 18 19import android.content.ComponentName; 20import android.content.pm.PackageManager; 21import android.content.pm.ResolveInfo; 22import android.content.res.Resources; 23import android.content.res.TypedArray; 24import android.content.res.XmlResourceParser; 25import android.service.trust.TrustAgentService; 26import android.util.AttributeSet; 27import android.util.Slog; 28import android.util.Xml; 29 30import org.xmlpull.v1.XmlPullParser; 31import org.xmlpull.v1.XmlPullParserException; 32 33import java.io.IOException; 34 35import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin; 36 37// TODO(b/34461256): Refactor TrustAgentUtils into TrustAgentManager. 38public class TrustAgentUtils { 39 static final String TAG = "TrustAgentUtils"; 40 41 private static final String TRUST_AGENT_META_DATA = TrustAgentService.TRUST_AGENT_META_DATA; 42 43 public static class TrustAgentComponentInfo { 44 ComponentName componentName; 45 String title; 46 String summary; 47 EnforcedAdmin admin = null; 48 } 49 50 public static ComponentName getComponentName(ResolveInfo resolveInfo) { 51 if (resolveInfo == null || resolveInfo.serviceInfo == null) return null; 52 return new ComponentName(resolveInfo.serviceInfo.packageName, resolveInfo.serviceInfo.name); 53 } 54 55 public static TrustAgentComponentInfo getSettingsComponent( 56 PackageManager pm, ResolveInfo resolveInfo) { 57 if (resolveInfo == null || resolveInfo.serviceInfo == null 58 || resolveInfo.serviceInfo.metaData == null) return null; 59 String cn = null; 60 TrustAgentComponentInfo trustAgentComponentInfo = new TrustAgentComponentInfo(); 61 XmlResourceParser parser = null; 62 Exception caughtException = null; 63 try { 64 parser = resolveInfo.serviceInfo.loadXmlMetaData(pm, TRUST_AGENT_META_DATA); 65 if (parser == null) { 66 Slog.w(TAG, "Can't find " + TRUST_AGENT_META_DATA + " meta-data"); 67 return null; 68 } 69 Resources res = pm.getResourcesForApplication(resolveInfo.serviceInfo.applicationInfo); 70 AttributeSet attrs = Xml.asAttributeSet(parser); 71 int type; 72 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 73 && type != XmlPullParser.START_TAG) { 74 } 75 String nodeName = parser.getName(); 76 if (!"trust-agent".equals(nodeName)) { 77 Slog.w(TAG, "Meta-data does not start with trust-agent tag"); 78 return null; 79 } 80 TypedArray sa = 81 res.obtainAttributes(attrs, com.android.internal.R.styleable.TrustAgent); 82 trustAgentComponentInfo.summary = 83 sa.getString(com.android.internal.R.styleable.TrustAgent_summary); 84 trustAgentComponentInfo.title = 85 sa.getString(com.android.internal.R.styleable.TrustAgent_title); 86 cn = sa.getString(com.android.internal.R.styleable.TrustAgent_settingsActivity); 87 sa.recycle(); 88 } catch (PackageManager.NameNotFoundException e) { 89 caughtException = e; 90 } catch (IOException e) { 91 caughtException = e; 92 } catch (XmlPullParserException e) { 93 caughtException = e; 94 } finally { 95 if (parser != null) parser.close(); 96 } 97 if (caughtException != null) { 98 Slog.w(TAG, "Error parsing : " + resolveInfo.serviceInfo.packageName, caughtException); 99 return null; 100 } 101 if (cn != null && cn.indexOf('/') < 0) { 102 cn = resolveInfo.serviceInfo.packageName + "/" + cn; 103 } 104 trustAgentComponentInfo.componentName = (cn == null) ? null : ComponentName.unflattenFromString(cn); 105 return trustAgentComponentInfo; 106 } 107} 108