/* * 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.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 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 boolean userInitiated; // managingTrust final boolean managingTrust; private Event(int type, int userId, ComponentName agent, String message, long duration, boolean userInitiated, boolean managingTrust) { this.type = type; this.userId = userId; this.agent = agent; this.elapsedTimestamp = SystemClock.elapsedRealtime(); this.message = message; this.duration = duration; this.userInitiated = userInitiated; this.managingTrust = managingTrust; } } ArrayDeque mEvents = new ArrayDeque(); public void logGrantTrust(int userId, ComponentName agent, String message, long duration, boolean userInitiated) { addEvent(new Event(TYPE_GRANT_TRUST, userId, agent, message, duration, userInitiated, false)); } public void logRevokeTrust(int userId, ComponentName agent) { addEvent(new Event(TYPE_REVOKE_TRUST, userId, agent, null, 0, false, false)); } public void logTrustTimeout(int userId, ComponentName agent) { addEvent(new Event(TYPE_TRUST_TIMEOUT, userId, agent, null, 0, false, false)); } public void logAgentDied(int userId, ComponentName agent) { addEvent(new Event(TYPE_AGENT_DIED, userId, agent, null, 0, false, false)); } public void logAgentConnected(int userId, ComponentName agent) { addEvent(new Event(TYPE_AGENT_CONNECTED, userId, agent, null, 0, false, false)); } public void logAgentStopped(int userId, ComponentName agent) { addEvent(new Event(TYPE_AGENT_STOPPED, userId, agent, null, 0, false, false)); } public void logManagingTrust(int userId, ComponentName agent, boolean managing) { addEvent(new Event(TYPE_MANAGING_TRUST, userId, agent, null, 0, false, managing)); } 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 iter = mEvents.descendingIterator(); while (iter.hasNext() && count < limit) { Event ev = iter.next(); if (userId != UserHandle.USER_ALL && userId != ev.userId) { 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(", "); } 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, initiatedByUser=%d", ev.message, formatDuration(ev.duration), ev.userInitiated ? 1 : 0); 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"; default: return "Unknown(" + type + ")"; } } }