Vincent Breitmoser
3 years ago
parent
12dce183d1
commit
5cd210831b
@ -1,144 +0,0 @@
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/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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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 java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Comparator;
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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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import android.content.Context;
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import de.measite.minidns.Client;
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import de.measite.minidns.Question;
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import de.measite.minidns.Record;
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import de.measite.minidns.record.SRV;
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import org.sufficientlysecure.keychain.keyimport.HkpKeyserverAddress;
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import org.sufficientlysecure.keychain.keyimport.HkpKeyserverClient;
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import org.sufficientlysecure.keychain.keyimport.ImportKeysListEntry;
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import org.sufficientlysecure.keychain.keyimport.KeyserverClient;
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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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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 HkpKeyserverAddress mKeyserver;
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public ImportContactKeysCallback(Context context, HkpKeyserverAddress keyserver,
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ParcelableProxy proxy) {
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this(context, new ContactHelper(context).getContactMails(), keyserver, proxy);
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}
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public ImportContactKeysCallback(Context context, List<String> mails,
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HkpKeyserverAddress keyserver, ParcelableProxy 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(ParcelableKeyRing.createFromReference(entry.getFingerprint(), entry.getKeyIdHex(),
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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 ImportKeyringParcel.createImportKeyringParcel(mKeyList, mKeyserver);
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}
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}
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public static Set<ImportKeysListEntry> getEmailKeys(Context context, String mail,
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ParcelableProxy 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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HkpKeyserverAddress hkp = findKeyserverFromDns(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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HkpKeyserverAddress server = Preferences.getPreferences(context).getPreferredKeyserver();
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if (server != null) {
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keys.addAll(getEmailKeys(mail, server, 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, HkpKeyserverAddress keyServer,
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ParcelableProxy proxy) {
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Set<ImportKeysListEntry> keys = new HashSet<>();
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try {
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for (ImportKeysListEntry key : HkpKeyserverClient
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.fromHkpKeyserverAddress(keyServer).search(mail, proxy)) {
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if (key.isRevokedOrExpiredOrInsecure()) 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 (KeyserverClient.CloudSearchFailureException ignored) {
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}
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return new ArrayList<>(keys);
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}
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public static HkpKeyserverAddress findKeyserverFromDns(String domain) {
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try {
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Record[] records = new Client().query(new Question("_hkp._tcp." + domain, Record.TYPE.SRV)).getAnswers();
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if (records.length > 0) {
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Arrays.sort(records, new Comparator<Record>() {
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@Override
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public int compare(Record lhs, Record rhs) {
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if (lhs.getPayload().getType() != Record.TYPE.SRV) return 1;
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if (rhs.getPayload().getType() != Record.TYPE.SRV) return -1;
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return ((SRV) lhs.getPayload()).getPriority() - ((SRV) rhs.getPayload()).getPriority();
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}
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});
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Record record = records[0]; // This is our best choice
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if (record.getPayload().getType() == Record.TYPE.SRV) {
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SRV payload = (SRV) record.getPayload();
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return HkpKeyserverAddress.createFromUri(payload.getName() + ":" + payload.getPort());
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}
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}
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} catch (Exception ignored) {
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}
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return null;
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}
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}
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@ -1 +0,0 @@
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Subproject commit 969ffd2951fcaa07f46b441936a0c0fd4502dafd
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