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/*
* Copyright (C) 2014 Tim Bray <tbray@textuality.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.keyimport;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.Preferences;
import java.net.Proxy;
import java.util.ArrayList;
import java.util.Vector;
import android.support.annotation.NonNull;
/**
* Search two or more types of server for online keys.
*/
public class CloudSearch {
private final static long SECONDS = 1000;
public static ArrayList<ImportKeysListEntry> search(
@NonNull final String query, Preferences.CloudSearchPrefs cloudPrefs, @NonNull Proxy proxy)
throws Keyserver.CloudSearchFailureException {
final ArrayList<Keyserver> servers = new ArrayList<>();
// it's a Vector for sync, multiple threads might report problems
final Vector<Keyserver.CloudSearchFailureException> problems = new Vector<>();
if (cloudPrefs.searchKeyserver) {
servers.add(new HkpKeyserver(cloudPrefs.keyserver, proxy));
}
if (cloudPrefs.searchKeybase) {
servers.add(new KeybaseKeyserver(proxy));
}
if (cloudPrefs.searchFacebook) {
servers.add(new FacebookKeyserver(proxy));
}
final ImportKeysList results = new ImportKeysList(servers.size());
ArrayList<Thread> searchThreads = new ArrayList<>();
for (final Keyserver keyserver : servers) {
Runnable r = new Runnable() {
@Override
public void run() {
try {
results.addAll(keyserver.search(query));
} catch (Keyserver.CloudSearchFailureException e) {
problems.add(e);
}
results.finishedAdding(); // notifies if all searchers done
}
};
Thread searchThread = new Thread(r);
searchThreads.add(searchThread);
searchThread.start();
}
// wait for either all the searches to come back, or 10 seconds. If using proxy, wait 30 seconds.
synchronized (results) {
try {
if (proxy == Proxy.NO_PROXY) {
results.wait(30 * SECONDS);
} else {
results.wait(10 * SECONDS);
}
for (Thread thread : searchThreads) {
// kill threads that haven't returned yet
thread.interrupt();
}
} catch (InterruptedException ignored) {
}
}
if (results.outstandingSuppliers() > 0) {
String message = "Launched " + servers.size() + " cloud searchers, but " +
results.outstandingSuppliers() + "failed to complete.";
problems.add(new Keyserver.QueryFailedException(message));
}
if (!problems.isEmpty()) {
for (Keyserver.CloudSearchFailureException e : problems) {
Log.d(Constants.TAG, "Cloud search exception: " + e.getLocalizedMessage());
}
// only throw exception if we didn’t get any results
if (results.isEmpty()) {
throw problems.get(0);
}
}
return results;
}
}
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