112 lines
4.5 KiB
Java
112 lines
4.5 KiB
Java
/*
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* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.util;
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import android.content.Context;
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import org.sufficientlysecure.keychain.keyimport.HkpKeyserver;
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import org.sufficientlysecure.keychain.keyimport.ImportKeysListEntry;
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import org.sufficientlysecure.keychain.keyimport.Keyserver;
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import org.sufficientlysecure.keychain.keyimport.ParcelableKeyRing;
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import org.sufficientlysecure.keychain.operations.results.ImportKeyResult;
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import org.sufficientlysecure.keychain.service.ImportKeyringParcel;
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import org.sufficientlysecure.keychain.ui.base.CryptoOperationHelper;
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import java.net.Proxy;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Locale;
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import java.util.Set;
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public class EmailKeyHelper {
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// TODO: Make this not require a proxy in it's constructor, redesign when it is to be used
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// to import keys, simply use CryptoOperationHelper with this callback
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public abstract class ImportContactKeysCallback
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implements CryptoOperationHelper.Callback<ImportKeyringParcel, ImportKeyResult> {
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private ArrayList<ParcelableKeyRing> mKeyList;
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private String mKeyserver;
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public ImportContactKeysCallback(Context context, String keyserver, Proxy proxy) {
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this(context, ContactHelper.getContactMails(context), keyserver, proxy);
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}
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public ImportContactKeysCallback(Context context, List<String> mails, String keyserver,
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Proxy proxy) {
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Set<ImportKeysListEntry> entries = new HashSet<>();
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for (String mail : mails) {
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entries.addAll(getEmailKeys(context, mail, proxy));
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}
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// Put them in a list and import
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ArrayList<ParcelableKeyRing> keys = new ArrayList<>(entries.size());
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for (ImportKeysListEntry entry : entries) {
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keys.add(new ParcelableKeyRing(entry.getFingerprintHex(), entry.getKeyIdHex(), null));
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}
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mKeyList = keys;
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mKeyserver = keyserver;
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}
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@Override
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public ImportKeyringParcel createOperationInput() {
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return new ImportKeyringParcel(mKeyList, mKeyserver);
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}
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}
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public static Set<ImportKeysListEntry> getEmailKeys(Context context, String mail, Proxy proxy) {
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Set<ImportKeysListEntry> keys = new HashSet<>();
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// Try _hkp._tcp SRV record first
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String[] mailparts = mail.split("@");
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if (mailparts.length == 2) {
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HkpKeyserver hkp = HkpKeyserver.resolve(mailparts[1]);
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if (hkp != null) {
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keys.addAll(getEmailKeys(mail, hkp, proxy));
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}
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}
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if (keys.isEmpty()) {
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// Most users don't have the SRV record, so ask a default server as well
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String server = Preferences.getPreferences(context).getPreferredKeyserver();
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if (server != null) {
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HkpKeyserver hkp = new HkpKeyserver(server);
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keys.addAll(getEmailKeys(mail, hkp, proxy));
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}
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}
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return keys;
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}
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public static List<ImportKeysListEntry> getEmailKeys(String mail, Keyserver keyServer,
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Proxy proxy) {
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Set<ImportKeysListEntry> keys = new HashSet<>();
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try {
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for (ImportKeysListEntry key : keyServer.search(mail, proxy)) {
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if (key.isRevoked() || key.isExpired()) continue;
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for (String userId : key.getUserIds()) {
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if (userId.toLowerCase().contains(mail.toLowerCase(Locale.ENGLISH))) {
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keys.add(key);
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}
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}
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}
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} catch (Keyserver.QueryFailedException ignored) {
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} catch (Keyserver.QueryNeedsRepairException ignored) {
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}
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return new ArrayList<>(keys);
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}
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}
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