| /* |
| * Copyright (C) 2014 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.server.trust; |
| |
| import android.content.ComponentName; |
| import android.os.SystemClock; |
| import android.os.UserHandle; |
| import android.service.trust.TrustAgentService; |
| import android.util.TimeUtils; |
| |
| import java.io.PrintWriter; |
| import java.util.ArrayDeque; |
| import java.util.Iterator; |
| |
| /** |
| * An archive of trust events. |
| */ |
| public class TrustArchive { |
| private static final int TYPE_GRANT_TRUST = 0; |
| private static final int TYPE_REVOKE_TRUST = 1; |
| private static final int TYPE_TRUST_TIMEOUT = 2; |
| private static final int TYPE_AGENT_DIED = 3; |
| private static final int TYPE_AGENT_CONNECTED = 4; |
| private static final int TYPE_AGENT_STOPPED = 5; |
| private static final int TYPE_MANAGING_TRUST = 6; |
| private static final int TYPE_POLICY_CHANGED = 7; |
| |
| private static final int HISTORY_LIMIT = 200; |
| |
| private static class Event { |
| final int type; |
| final int userId; |
| final ComponentName agent; |
| final long elapsedTimestamp; |
| |
| // grantTrust |
| final String message; |
| final long duration; |
| final int flags; |
| |
| // managingTrust |
| final boolean managingTrust; |
| |
| private Event(int type, int userId, ComponentName agent, String message, |
| long duration, int flags, boolean managingTrust) { |
| this.type = type; |
| this.userId = userId; |
| this.agent = agent; |
| this.elapsedTimestamp = SystemClock.elapsedRealtime(); |
| this.message = message; |
| this.duration = duration; |
| this.flags = flags; |
| this.managingTrust = managingTrust; |
| } |
| } |
| |
| ArrayDeque<Event> mEvents = new ArrayDeque<Event>(); |
| |
| public void logGrantTrust(int userId, ComponentName agent, String message, |
| long duration, int flags) { |
| addEvent(new Event(TYPE_GRANT_TRUST, userId, agent, message, duration, |
| flags, false)); |
| } |
| |
| public void logRevokeTrust(int userId, ComponentName agent) { |
| addEvent(new Event(TYPE_REVOKE_TRUST, userId, agent, null, 0, 0, false)); |
| } |
| |
| public void logTrustTimeout(int userId, ComponentName agent) { |
| addEvent(new Event(TYPE_TRUST_TIMEOUT, userId, agent, null, 0, 0, false)); |
| } |
| |
| public void logAgentDied(int userId, ComponentName agent) { |
| addEvent(new Event(TYPE_AGENT_DIED, userId, agent, null, 0, 0, false)); |
| } |
| |
| public void logAgentConnected(int userId, ComponentName agent) { |
| addEvent(new Event(TYPE_AGENT_CONNECTED, userId, agent, null, 0, 0, false)); |
| } |
| |
| public void logAgentStopped(int userId, ComponentName agent) { |
| addEvent(new Event(TYPE_AGENT_STOPPED, userId, agent, null, 0, 0, false)); |
| } |
| |
| public void logManagingTrust(int userId, ComponentName agent, boolean managing) { |
| addEvent(new Event(TYPE_MANAGING_TRUST, userId, agent, null, 0, 0, managing)); |
| } |
| |
| public void logDevicePolicyChanged() { |
| addEvent(new Event(TYPE_POLICY_CHANGED, UserHandle.USER_ALL, null, null, 0, 0, false)); |
| } |
| |
| private void addEvent(Event e) { |
| if (mEvents.size() >= HISTORY_LIMIT) { |
| mEvents.removeFirst(); |
| } |
| mEvents.addLast(e); |
| } |
| |
| public void dump(PrintWriter writer, int limit, int userId, String linePrefix, |
| boolean duplicateSimpleNames) { |
| int count = 0; |
| Iterator<Event> iter = mEvents.descendingIterator(); |
| while (iter.hasNext() && count < limit) { |
| Event ev = iter.next(); |
| if (userId != UserHandle.USER_ALL && userId != ev.userId |
| && ev.userId != UserHandle.USER_ALL) { |
| continue; |
| } |
| |
| writer.print(linePrefix); |
| writer.printf("#%-2d %s %s: ", count, formatElapsed(ev.elapsedTimestamp), |
| dumpType(ev.type)); |
| if (userId == UserHandle.USER_ALL) { |
| writer.print("user="); writer.print(ev.userId); writer.print(", "); |
| } |
| if (ev.agent != null) { |
| writer.print("agent="); |
| if (duplicateSimpleNames) { |
| writer.print(ev.agent.flattenToShortString()); |
| } else { |
| writer.print(getSimpleName(ev.agent)); |
| } |
| } |
| switch (ev.type) { |
| case TYPE_GRANT_TRUST: |
| writer.printf(", message=\"%s\", duration=%s, flags=%s", |
| ev.message, formatDuration(ev.duration), dumpGrantFlags(ev.flags)); |
| break; |
| case TYPE_MANAGING_TRUST: |
| writer.printf(", managingTrust=" + ev.managingTrust); |
| break; |
| default: |
| } |
| writer.println(); |
| count++; |
| } |
| } |
| |
| public static String formatDuration(long duration) { |
| StringBuilder sb = new StringBuilder(); |
| TimeUtils.formatDuration(duration, sb); |
| return sb.toString(); |
| } |
| |
| private static String formatElapsed(long elapsed) { |
| long delta = elapsed - SystemClock.elapsedRealtime(); |
| long wallTime = delta + System.currentTimeMillis(); |
| return TimeUtils.logTimeOfDay(wallTime); |
| } |
| |
| /* package */ static String getSimpleName(ComponentName cn) { |
| String name = cn.getClassName(); |
| int idx = name.lastIndexOf('.'); |
| if (idx < name.length() && idx >= 0) { |
| return name.substring(idx + 1); |
| } else { |
| return name; |
| } |
| } |
| |
| private String dumpType(int type) { |
| switch (type) { |
| case TYPE_GRANT_TRUST: |
| return "GrantTrust"; |
| case TYPE_REVOKE_TRUST: |
| return "RevokeTrust"; |
| case TYPE_TRUST_TIMEOUT: |
| return "TrustTimeout"; |
| case TYPE_AGENT_DIED: |
| return "AgentDied"; |
| case TYPE_AGENT_CONNECTED: |
| return "AgentConnected"; |
| case TYPE_AGENT_STOPPED: |
| return "AgentStopped"; |
| case TYPE_MANAGING_TRUST: |
| return "ManagingTrust"; |
| case TYPE_POLICY_CHANGED: |
| return "DevicePolicyChanged"; |
| default: |
| return "Unknown(" + type + ")"; |
| } |
| } |
| |
| private String dumpGrantFlags(int flags) { |
| StringBuilder sb = new StringBuilder(); |
| if ((flags & TrustAgentService.FLAG_GRANT_TRUST_INITIATED_BY_USER) != 0) { |
| if (sb.length() != 0) sb.append('|'); |
| sb.append("INITIATED_BY_USER"); |
| } |
| if ((flags & TrustAgentService.FLAG_GRANT_TRUST_DISMISS_KEYGUARD) != 0) { |
| if (sb.length() != 0) sb.append('|'); |
| sb.append("DISMISS_KEYGUARD"); |
| } |
| if (sb.length() == 0) { |
| sb.append('0'); |
| } |
| return sb.toString(); |
| } |
| } |