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/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* 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.helper;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Messenger;
import org.sufficientlysecure.keychain.keyimport.HkpKeyserver;
import org.sufficientlysecure.keychain.keyimport.ImportKeysListEntry;
import org.sufficientlysecure.keychain.keyimport.Keyserver;
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;
public class EmailKeyHelper {
public static void importContacts(Context context, Messenger messenger) {
importAll(context, messenger, ContactHelper.getContactMails(context));
}
public static void importAll(Context context, Messenger messenger, List<String> mails) {
Set<ImportKeysListEntry> keys = new HashSet<ImportKeysListEntry>();
for (String mail : mails) {
keys.addAll(getEmailKeys(context, mail));
}
importKeys(context, messenger, new ArrayList<ImportKeysListEntry>(keys));
}
public static List<ImportKeysListEntry> getEmailKeys(Context context, String mail) {
Set<ImportKeysListEntry> keys = new HashSet<ImportKeysListEntry>();
// Try _hkp._tcp SRV record first
String[] mailparts = mail.split("@");
if (mailparts.length == 2) {
HkpKeyserver hkp = HkpKeyserver.resolve(mailparts[1]);
if (hkp != null) {
keys.addAll(getEmailKeys(mail, hkp));
}
}
if (keys.isEmpty()) {
// Most users don't have the SRV record, so ask a default server as well
String[] servers = Preferences.getPreferences(context).getKeyServers();
if (servers != null && servers.length != 0) {
HkpKeyserver hkp = new HkpKeyserver(servers[0]);
keys.addAll(getEmailKeys(mail, hkp));
}
}
return new ArrayList<ImportKeysListEntry>(keys);
}
private static void importKeys(Context context, Messenger messenger, List<ImportKeysListEntry> keys) {
Intent importIntent = new Intent(context, KeychainIntentService.class);
importIntent.setAction(KeychainIntentService.ACTION_DOWNLOAD_AND_IMPORT_KEYS);
Bundle importData = new Bundle();
importData.putParcelableArrayList(KeychainIntentService.DOWNLOAD_KEY_LIST,
new ArrayList<ImportKeysListEntry>(keys));
importIntent.putExtra(KeychainIntentService.EXTRA_DATA, importData);
importIntent.putExtra(KeychainIntentService.EXTRA_MESSENGER, messenger);
context.startService(importIntent);
}
public static List<ImportKeysListEntry> getEmailKeys(String mail, Keyserver keyServer) {
Set<ImportKeysListEntry> keys = new HashSet<ImportKeysListEntry>();
try {
for (ImportKeysListEntry key : keyServer.search(mail)) {
if (key.isRevoked() || key.isExpired()) continue;
for (String userId : key.getUserIds()) {
if (userId.toLowerCase().contains(mail.toLowerCase(Locale.ENGLISH))) {
keys.add(key);
}
}
}
} catch (Keyserver.QueryFailedException ignored) {
} catch (Keyserver.QueryNeedsRepairException ignored) {
}
return new ArrayList<ImportKeysListEntry>(keys);
}
}
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