1407 lines
56 KiB
Java
1407 lines
56 KiB
Java
package eu.siacs.conversations.crypto.axolotl;
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import android.os.Bundle;
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import android.security.KeyChain;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.util.Log;
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import android.util.Pair;
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import org.bouncycastle.jce.provider.BouncyCastleProvider;
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import org.whispersystems.libsignal.SignalProtocolAddress;
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import org.whispersystems.libsignal.IdentityKey;
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import org.whispersystems.libsignal.IdentityKeyPair;
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import org.whispersystems.libsignal.InvalidKeyException;
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import org.whispersystems.libsignal.InvalidKeyIdException;
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import org.whispersystems.libsignal.SessionBuilder;
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import org.whispersystems.libsignal.UntrustedIdentityException;
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import org.whispersystems.libsignal.ecc.ECPublicKey;
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import org.whispersystems.libsignal.state.PreKeyBundle;
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import org.whispersystems.libsignal.state.PreKeyRecord;
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import org.whispersystems.libsignal.state.SignedPreKeyRecord;
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import org.whispersystems.libsignal.util.KeyHelper;
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import java.security.PrivateKey;
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import java.security.Security;
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import java.security.Signature;
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import java.security.cert.X509Certificate;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Random;
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import java.util.Set;
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import java.util.concurrent.atomic.AtomicBoolean;
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import eu.siacs.conversations.Config;
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import eu.siacs.conversations.entities.Account;
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import eu.siacs.conversations.entities.Contact;
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import eu.siacs.conversations.entities.Conversation;
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import eu.siacs.conversations.entities.Message;
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import eu.siacs.conversations.parser.IqParser;
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import eu.siacs.conversations.services.XmppConnectionService;
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import eu.siacs.conversations.utils.CryptoHelper;
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import eu.siacs.conversations.utils.SerialSingleThreadExecutor;
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import eu.siacs.conversations.xml.Element;
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import eu.siacs.conversations.xml.Namespace;
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import eu.siacs.conversations.xmpp.OnAdvancedStreamFeaturesLoaded;
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import eu.siacs.conversations.xmpp.OnIqPacketReceived;
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import eu.siacs.conversations.xmpp.jid.InvalidJidException;
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import eu.siacs.conversations.xmpp.jid.Jid;
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import eu.siacs.conversations.xmpp.pep.PublishOptions;
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import eu.siacs.conversations.xmpp.stanzas.IqPacket;
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import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
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public class AxolotlService implements OnAdvancedStreamFeaturesLoaded {
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public static final String PEP_PREFIX = "eu.siacs.conversations.axolotl";
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public static final String PEP_DEVICE_LIST = PEP_PREFIX + ".devicelist";
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public static final String PEP_DEVICE_LIST_NOTIFY = PEP_DEVICE_LIST + "+notify";
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public static final String PEP_BUNDLES = PEP_PREFIX + ".bundles";
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public static final String PEP_VERIFICATION = PEP_PREFIX + ".verification";
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public static final String PEP_OMEMO_WHITELISTED = PEP_PREFIX + ".whitelisted";
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public static final String LOGPREFIX = "AxolotlService";
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public static final int NUM_KEYS_TO_PUBLISH = 100;
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public static final int publishTriesThreshold = 3;
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private final Account account;
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private final XmppConnectionService mXmppConnectionService;
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private final SQLiteAxolotlStore axolotlStore;
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private final SessionMap sessions;
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private final Map<Jid, Set<Integer>> deviceIds;
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private final Map<String, XmppAxolotlMessage> messageCache;
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private final FetchStatusMap fetchStatusMap;
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private final HashMap<Jid, List<OnDeviceIdsFetched>> fetchDeviceIdsMap = new HashMap<>();
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private final SerialSingleThreadExecutor executor;
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private int numPublishTriesOnEmptyPep = 0;
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private boolean pepBroken = false;
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private int lastDeviceListNotificationHash = 0;
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private Set<XmppAxolotlSession> postponedSessions = new HashSet<>(); //sessions stored here will receive after mam catchup treatment
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private AtomicBoolean changeAccessMode = new AtomicBoolean(false);
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@Override
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public void onAdvancedStreamFeaturesAvailable(Account account) {
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if (Config.supportOmemo()
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&& account.getXmppConnection() != null
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&& account.getXmppConnection().getFeatures().pep()) {
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publishBundlesIfNeeded(true, false);
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} else {
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Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": skipping OMEMO initialization");
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}
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}
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public boolean fetchMapHasErrors(List<Jid> jids) {
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for (Jid jid : jids) {
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if (deviceIds.get(jid) != null) {
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for (Integer foreignId : this.deviceIds.get(jid)) {
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SignalProtocolAddress address = new SignalProtocolAddress(jid.toPreppedString(), foreignId);
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if (fetchStatusMap.getAll(address.getName()).containsValue(FetchStatus.ERROR)) {
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return true;
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}
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}
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}
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}
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return false;
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}
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public void preVerifyFingerprint(Contact contact, String fingerprint) {
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axolotlStore.preVerifyFingerprint(contact.getAccount(), contact.getJid().toBareJid().toPreppedString(), fingerprint);
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}
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public void preVerifyFingerprint(Account account, String fingerprint) {
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axolotlStore.preVerifyFingerprint(account, account.getJid().toBareJid().toPreppedString(), fingerprint);
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}
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public boolean hasVerifiedKeys(String name) {
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for (XmppAxolotlSession session : this.sessions.getAll(name).values()) {
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if (session.getTrust().isVerified()) {
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return true;
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}
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}
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return false;
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}
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private static class AxolotlAddressMap<T> {
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protected Map<String, Map<Integer, T>> map;
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protected final Object MAP_LOCK = new Object();
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public AxolotlAddressMap() {
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this.map = new HashMap<>();
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}
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public void put(SignalProtocolAddress address, T value) {
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synchronized (MAP_LOCK) {
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Map<Integer, T> devices = map.get(address.getName());
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if (devices == null) {
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devices = new HashMap<>();
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map.put(address.getName(), devices);
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}
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devices.put(address.getDeviceId(), value);
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}
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}
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public T get(SignalProtocolAddress address) {
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synchronized (MAP_LOCK) {
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Map<Integer, T> devices = map.get(address.getName());
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if (devices == null) {
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return null;
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}
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return devices.get(address.getDeviceId());
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}
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}
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public Map<Integer, T> getAll(String name) {
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synchronized (MAP_LOCK) {
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Map<Integer, T> devices = map.get(name);
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if (devices == null) {
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return new HashMap<>();
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}
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return devices;
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}
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}
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public boolean hasAny(SignalProtocolAddress address) {
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synchronized (MAP_LOCK) {
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Map<Integer, T> devices = map.get(address.getName());
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return devices != null && !devices.isEmpty();
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}
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}
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public void clear() {
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map.clear();
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}
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}
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private static class SessionMap extends AxolotlAddressMap<XmppAxolotlSession> {
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private final XmppConnectionService xmppConnectionService;
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private final Account account;
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public SessionMap(XmppConnectionService service, SQLiteAxolotlStore store, Account account) {
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super();
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this.xmppConnectionService = service;
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this.account = account;
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this.fillMap(store);
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}
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private void putDevicesForJid(String bareJid, List<Integer> deviceIds, SQLiteAxolotlStore store) {
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for (Integer deviceId : deviceIds) {
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SignalProtocolAddress axolotlAddress = new SignalProtocolAddress(bareJid, deviceId);
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IdentityKey identityKey = store.loadSession(axolotlAddress).getSessionState().getRemoteIdentityKey();
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if (Config.X509_VERIFICATION) {
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X509Certificate certificate = store.getFingerprintCertificate(CryptoHelper.bytesToHex(identityKey.getPublicKey().serialize()));
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if (certificate != null) {
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Bundle information = CryptoHelper.extractCertificateInformation(certificate);
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try {
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final String cn = information.getString("subject_cn");
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final Jid jid = Jid.fromString(bareJid);
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Log.d(Config.LOGTAG, "setting common name for " + jid + " to " + cn);
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account.getRoster().getContact(jid).setCommonName(cn);
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} catch (final InvalidJidException ignored) {
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//ignored
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}
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}
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}
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this.put(axolotlAddress, new XmppAxolotlSession(account, store, axolotlAddress, identityKey));
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}
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}
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private void fillMap(SQLiteAxolotlStore store) {
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List<Integer> deviceIds = store.getSubDeviceSessions(account.getJid().toBareJid().toPreppedString());
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putDevicesForJid(account.getJid().toBareJid().toPreppedString(), deviceIds, store);
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for (String address : store.getKnownAddresses()) {
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deviceIds = store.getSubDeviceSessions(address);
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putDevicesForJid(address, deviceIds, store);
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}
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}
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@Override
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public void put(SignalProtocolAddress address, XmppAxolotlSession value) {
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super.put(address, value);
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value.setNotFresh();
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}
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public void put(XmppAxolotlSession session) {
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this.put(session.getRemoteAddress(), session);
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}
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}
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public enum FetchStatus {
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PENDING,
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SUCCESS,
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SUCCESS_VERIFIED,
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TIMEOUT,
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SUCCESS_TRUSTED,
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ERROR
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}
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private static class FetchStatusMap extends AxolotlAddressMap<FetchStatus> {
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public void clearErrorFor(Jid jid) {
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synchronized (MAP_LOCK) {
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Map<Integer, FetchStatus> devices = this.map.get(jid.toBareJid().toPreppedString());
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if (devices == null) {
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return;
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}
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for (Map.Entry<Integer, FetchStatus> entry : devices.entrySet()) {
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if (entry.getValue() == FetchStatus.ERROR) {
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Log.d(Config.LOGTAG, "resetting error for " + jid.toBareJid() + "(" + entry.getKey() + ")");
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entry.setValue(FetchStatus.TIMEOUT);
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}
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}
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}
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}
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}
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public static String getLogprefix(Account account) {
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return LOGPREFIX + " (" + account.getJid().toBareJid().toString() + "): ";
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}
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public AxolotlService(Account account, XmppConnectionService connectionService) {
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if (account == null || connectionService == null) {
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throw new IllegalArgumentException("account and service cannot be null");
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}
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if (Security.getProvider("BC") == null) {
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Security.addProvider(new BouncyCastleProvider());
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}
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this.mXmppConnectionService = connectionService;
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this.account = account;
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this.axolotlStore = new SQLiteAxolotlStore(this.account, this.mXmppConnectionService);
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this.deviceIds = new HashMap<>();
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this.messageCache = new HashMap<>();
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this.sessions = new SessionMap(mXmppConnectionService, axolotlStore, account);
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this.fetchStatusMap = new FetchStatusMap();
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this.executor = new SerialSingleThreadExecutor("Axolotl");
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}
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public String getOwnFingerprint() {
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return CryptoHelper.bytesToHex(axolotlStore.getIdentityKeyPair().getPublicKey().serialize());
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}
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public Set<IdentityKey> getKeysWithTrust(FingerprintStatus status) {
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return axolotlStore.getContactKeysWithTrust(account.getJid().toBareJid().toPreppedString(), status);
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}
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public Set<IdentityKey> getKeysWithTrust(FingerprintStatus status, Jid jid) {
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return axolotlStore.getContactKeysWithTrust(jid.toBareJid().toPreppedString(), status);
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}
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public Set<IdentityKey> getKeysWithTrust(FingerprintStatus status, List<Jid> jids) {
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Set<IdentityKey> keys = new HashSet<>();
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for (Jid jid : jids) {
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keys.addAll(axolotlStore.getContactKeysWithTrust(jid.toPreppedString(), status));
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}
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return keys;
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}
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public long getNumTrustedKeys(Jid jid) {
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return axolotlStore.getContactNumTrustedKeys(jid.toBareJid().toPreppedString());
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}
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public boolean anyTargetHasNoTrustedKeys(List<Jid> jids) {
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for (Jid jid : jids) {
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if (axolotlStore.getContactNumTrustedKeys(jid.toBareJid().toPreppedString()) == 0) {
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return true;
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}
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}
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return false;
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}
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private SignalProtocolAddress getAddressForJid(Jid jid) {
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return new SignalProtocolAddress(jid.toPreppedString(), 0);
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}
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public Collection<XmppAxolotlSession> findOwnSessions() {
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SignalProtocolAddress ownAddress = getAddressForJid(account.getJid().toBareJid());
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ArrayList<XmppAxolotlSession> s = new ArrayList<>(this.sessions.getAll(ownAddress.getName()).values());
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Collections.sort(s);
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return s;
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}
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public Collection<XmppAxolotlSession> findSessionsForContact(Contact contact) {
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SignalProtocolAddress contactAddress = getAddressForJid(contact.getJid());
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ArrayList<XmppAxolotlSession> s = new ArrayList<>(this.sessions.getAll(contactAddress.getName()).values());
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Collections.sort(s);
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return s;
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}
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private Set<XmppAxolotlSession> findSessionsForConversation(Conversation conversation) {
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HashSet<XmppAxolotlSession> sessions = new HashSet<>();
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for (Jid jid : conversation.getAcceptedCryptoTargets()) {
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sessions.addAll(this.sessions.getAll(getAddressForJid(jid).getName()).values());
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}
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return sessions;
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}
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private boolean hasAny(Jid jid) {
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return sessions.hasAny(getAddressForJid(jid));
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}
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public boolean isPepBroken() {
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return this.pepBroken;
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}
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public void resetBrokenness() {
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this.pepBroken = false;
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this.numPublishTriesOnEmptyPep = 0;
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this.lastDeviceListNotificationHash = 0;
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}
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public void clearErrorsInFetchStatusMap(Jid jid) {
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fetchStatusMap.clearErrorFor(jid);
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}
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public void regenerateKeys(boolean wipeOther) {
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axolotlStore.regenerate();
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sessions.clear();
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fetchStatusMap.clear();
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fetchDeviceIdsMap.clear();
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publishBundlesIfNeeded(true, wipeOther);
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}
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public void destroy() {
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Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": destroying old axolotl service. no longer in use");
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mXmppConnectionService.databaseBackend.wipeAxolotlDb(account);
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}
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public AxolotlService makeNew() {
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Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": make new axolotl service");
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return new AxolotlService(this.account, this.mXmppConnectionService);
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}
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public int getOwnDeviceId() {
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return axolotlStore.getLocalRegistrationId();
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}
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public SignalProtocolAddress getOwnAxolotlAddress() {
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return new SignalProtocolAddress(account.getJid().toBareJid().toPreppedString(), getOwnDeviceId());
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}
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public Set<Integer> getOwnDeviceIds() {
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return this.deviceIds.get(account.getJid().toBareJid());
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}
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public void registerDevices(final Jid jid, @NonNull final Set<Integer> deviceIds) {
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final int hash = deviceIds.hashCode();
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final boolean me = jid.toBareJid().equals(account.getJid().toBareJid());
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if (me) {
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if (hash != 0 && hash == this.lastDeviceListNotificationHash) {
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Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": ignoring duplicate own device id list");
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return;
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}
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this.lastDeviceListNotificationHash = hash;
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}
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boolean needsPublishing = me && !deviceIds.contains(getOwnDeviceId());
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if (me) {
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deviceIds.remove(getOwnDeviceId());
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}
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Set<Integer> expiredDevices = new HashSet<>(axolotlStore.getSubDeviceSessions(jid.toBareJid().toPreppedString()));
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expiredDevices.removeAll(deviceIds);
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for (Integer deviceId : expiredDevices) {
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SignalProtocolAddress address = new SignalProtocolAddress(jid.toBareJid().toPreppedString(), deviceId);
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XmppAxolotlSession session = sessions.get(address);
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if (session != null && session.getFingerprint() != null) {
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if (session.getTrust().isActive()) {
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session.setTrust(session.getTrust().toInactive());
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}
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}
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}
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Set<Integer> newDevices = new HashSet<>(deviceIds);
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for (Integer deviceId : newDevices) {
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SignalProtocolAddress address = new SignalProtocolAddress(jid.toBareJid().toPreppedString(), deviceId);
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XmppAxolotlSession session = sessions.get(address);
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if (session != null && session.getFingerprint() != null) {
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if (!session.getTrust().isActive()) {
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Log.d(Config.LOGTAG, "reactivating device with fingerprint " + session.getFingerprint());
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session.setTrust(session.getTrust().toActive());
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}
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}
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}
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if (me) {
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if (Config.OMEMO_AUTO_EXPIRY != 0) {
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needsPublishing |= deviceIds.removeAll(getExpiredDevices());
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}
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needsPublishing |= this.changeAccessMode.get();
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for (Integer deviceId : deviceIds) {
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SignalProtocolAddress ownDeviceAddress = new SignalProtocolAddress(jid.toBareJid().toPreppedString(), deviceId);
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if (sessions.get(ownDeviceAddress) == null) {
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FetchStatus status = fetchStatusMap.get(ownDeviceAddress);
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if (status == null || status == FetchStatus.TIMEOUT) {
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fetchStatusMap.put(ownDeviceAddress, FetchStatus.PENDING);
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this.buildSessionFromPEP(ownDeviceAddress);
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}
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}
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}
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if (needsPublishing) {
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publishOwnDeviceId(deviceIds);
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}
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}
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this.deviceIds.put(jid, deviceIds);
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mXmppConnectionService.updateConversationUi(); //update the lock icon
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mXmppConnectionService.keyStatusUpdated(null);
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}
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public void wipeOtherPepDevices() {
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if (pepBroken) {
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Log.d(Config.LOGTAG, getLogprefix(account) + "wipeOtherPepDevices called, but PEP is broken. Ignoring... ");
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return;
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}
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Set<Integer> deviceIds = new HashSet<>();
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deviceIds.add(getOwnDeviceId());
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publishDeviceIdsAndRefineAccessModel(deviceIds);
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}
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public void distrustFingerprint(final String fingerprint) {
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final String fp = fingerprint.replaceAll("\\s", "");
|
||
final FingerprintStatus fingerprintStatus = axolotlStore.getFingerprintStatus(fp);
|
||
axolotlStore.setFingerprintStatus(fp, fingerprintStatus.toUntrusted());
|
||
}
|
||
|
||
public void publishOwnDeviceIdIfNeeded() {
|
||
if (pepBroken) {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "publishOwnDeviceIdIfNeeded called, but PEP is broken. Ignoring... ");
|
||
return;
|
||
}
|
||
IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveDeviceIds(account.getJid().toBareJid());
|
||
mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
|
||
@Override
|
||
public void onIqPacketReceived(Account account, IqPacket packet) {
|
||
if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "Timeout received while retrieving own Device Ids.");
|
||
} else {
|
||
Element item = mXmppConnectionService.getIqParser().getItem(packet);
|
||
Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": retrieved own device list: " + deviceIds);
|
||
registerDevices(account.getJid().toBareJid(), deviceIds);
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
private Set<Integer> getExpiredDevices() {
|
||
Set<Integer> devices = new HashSet<>();
|
||
for (XmppAxolotlSession session : findOwnSessions()) {
|
||
if (session.getTrust().isActive()) {
|
||
long diff = System.currentTimeMillis() - session.getTrust().getLastActivation();
|
||
if (diff > Config.OMEMO_AUTO_EXPIRY) {
|
||
long lastMessageDiff = System.currentTimeMillis() - mXmppConnectionService.databaseBackend.getLastTimeFingerprintUsed(account, session.getFingerprint());
|
||
long hours = Math.round(lastMessageDiff / (1000 * 60.0 * 60.0));
|
||
if (lastMessageDiff > Config.OMEMO_AUTO_EXPIRY) {
|
||
devices.add(session.getRemoteAddress().getDeviceId());
|
||
session.setTrust(session.getTrust().toInactive());
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": added own device " + session.getFingerprint() + " to list of expired devices. Last message received " + hours + " hours ago");
|
||
} else {
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": own device " + session.getFingerprint() + " was active " + hours + " hours ago");
|
||
}
|
||
}
|
||
}
|
||
}
|
||
return devices;
|
||
}
|
||
|
||
public void publishOwnDeviceId(Set<Integer> deviceIds) {
|
||
Set<Integer> deviceIdsCopy = new HashSet<>(deviceIds);
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "publishing own device ids");
|
||
if (deviceIdsCopy.isEmpty()) {
|
||
if (numPublishTriesOnEmptyPep >= publishTriesThreshold) {
|
||
Log.w(Config.LOGTAG, getLogprefix(account) + "Own device publish attempt threshold exceeded, aborting...");
|
||
pepBroken = true;
|
||
return;
|
||
} else {
|
||
numPublishTriesOnEmptyPep++;
|
||
Log.w(Config.LOGTAG, getLogprefix(account) + "Own device list empty, attempting to publish (try " + numPublishTriesOnEmptyPep + ")");
|
||
}
|
||
} else {
|
||
numPublishTriesOnEmptyPep = 0;
|
||
}
|
||
deviceIdsCopy.add(getOwnDeviceId());
|
||
publishDeviceIdsAndRefineAccessModel(deviceIdsCopy);
|
||
}
|
||
|
||
private void publishDeviceIdsAndRefineAccessModel(Set<Integer> ids) {
|
||
publishDeviceIdsAndRefineAccessModel(ids, true);
|
||
}
|
||
|
||
private void publishDeviceIdsAndRefineAccessModel(final Set<Integer> ids, final boolean firstAttempt) {
|
||
final Bundle publishOptions = account.getXmppConnection().getFeatures().pepPublishOptions() ? PublishOptions.openAccess() : null;
|
||
IqPacket publish = mXmppConnectionService.getIqGenerator().publishDeviceIds(ids, publishOptions);
|
||
mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() {
|
||
@Override
|
||
public void onIqPacketReceived(Account account, IqPacket packet) {
|
||
Element error = packet.getType() == IqPacket.TYPE.ERROR ? packet.findChild("error") : null;
|
||
if (firstAttempt && error != null && error.hasChild("precondition-not-met", Namespace.PUBSUB_ERROR)) {
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": precondition wasn't met for device list. pushing node configuration");
|
||
mXmppConnectionService.pushNodeConfiguration(account, AxolotlService.PEP_DEVICE_LIST, publishOptions, new XmppConnectionService.OnConfigurationPushed() {
|
||
@Override
|
||
public void onPushSucceeded() {
|
||
publishDeviceIdsAndRefineAccessModel(ids, false);
|
||
}
|
||
|
||
@Override
|
||
public void onPushFailed() {
|
||
publishDeviceIdsAndRefineAccessModel(ids, false);
|
||
}
|
||
});
|
||
} else {
|
||
if (AxolotlService.this.changeAccessMode.compareAndSet(true, false)) {
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done changing access mode");
|
||
account.setOption(Account.OPTION_REQUIRES_ACCESS_MODE_CHANGE, false);
|
||
mXmppConnectionService.databaseBackend.updateAccount(account);
|
||
}
|
||
if (packet.getType() == IqPacket.TYPE.ERROR) {
|
||
pepBroken = true;
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "Error received while publishing own device id" + packet.findChild("error"));
|
||
}
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
public void publishDeviceVerificationAndBundle(final SignedPreKeyRecord signedPreKeyRecord,
|
||
final Set<PreKeyRecord> preKeyRecords,
|
||
final boolean announceAfter,
|
||
final boolean wipe) {
|
||
try {
|
||
IdentityKey axolotlPublicKey = axolotlStore.getIdentityKeyPair().getPublicKey();
|
||
PrivateKey x509PrivateKey = KeyChain.getPrivateKey(mXmppConnectionService, account.getPrivateKeyAlias());
|
||
X509Certificate[] chain = KeyChain.getCertificateChain(mXmppConnectionService, account.getPrivateKeyAlias());
|
||
Signature verifier = Signature.getInstance("sha256WithRSA");
|
||
verifier.initSign(x509PrivateKey, mXmppConnectionService.getRNG());
|
||
verifier.update(axolotlPublicKey.serialize());
|
||
byte[] signature = verifier.sign();
|
||
IqPacket packet = mXmppConnectionService.getIqGenerator().publishVerification(signature, chain, getOwnDeviceId());
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + ": publish verification for device " + getOwnDeviceId());
|
||
mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
|
||
@Override
|
||
public void onIqPacketReceived(final Account account, IqPacket packet) {
|
||
String node = AxolotlService.PEP_VERIFICATION + ":" + getOwnDeviceId();
|
||
mXmppConnectionService.pushNodeConfiguration(account, node, PublishOptions.openAccess(), new XmppConnectionService.OnConfigurationPushed() {
|
||
@Override
|
||
public void onPushSucceeded() {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "configured verification node to be world readable");
|
||
publishDeviceBundle(signedPreKeyRecord, preKeyRecords, announceAfter, wipe);
|
||
}
|
||
|
||
@Override
|
||
public void onPushFailed() {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "unable to set access model on verification node");
|
||
publishDeviceBundle(signedPreKeyRecord, preKeyRecords, announceAfter, wipe);
|
||
}
|
||
});
|
||
}
|
||
});
|
||
} catch (Exception e) {
|
||
e.printStackTrace();
|
||
}
|
||
}
|
||
|
||
public void publishBundlesIfNeeded(final boolean announce, final boolean wipe) {
|
||
if (pepBroken) {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "publishBundlesIfNeeded called, but PEP is broken. Ignoring... ");
|
||
return;
|
||
}
|
||
|
||
if (account.getXmppConnection().getFeatures().pepPublishOptions()) {
|
||
this.changeAccessMode.set(account.isOptionSet(Account.OPTION_REQUIRES_ACCESS_MODE_CHANGE));
|
||
} else {
|
||
if (account.setOption(Account.OPTION_REQUIRES_ACCESS_MODE_CHANGE, true)) {
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server doesn’t support publish-options. setting for later access mode change");
|
||
mXmppConnectionService.databaseBackend.updateAccount(account);
|
||
}
|
||
}
|
||
if (this.changeAccessMode.get()) {
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server gained publish-options capabilities. changing access model");
|
||
}
|
||
IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveBundlesForDevice(account.getJid().toBareJid(), getOwnDeviceId());
|
||
mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
|
||
@Override
|
||
public void onIqPacketReceived(Account account, IqPacket packet) {
|
||
|
||
if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
|
||
return; //ignore timeout. do nothing
|
||
}
|
||
|
||
if (packet.getType() == IqPacket.TYPE.ERROR) {
|
||
Element error = packet.findChild("error");
|
||
if (error == null || !error.hasChild("item-not-found")) {
|
||
pepBroken = true;
|
||
Log.w(Config.LOGTAG, AxolotlService.getLogprefix(account) + "request for device bundles came back with something other than item-not-found" + packet);
|
||
return;
|
||
}
|
||
}
|
||
|
||
PreKeyBundle bundle = mXmppConnectionService.getIqParser().bundle(packet);
|
||
Map<Integer, ECPublicKey> keys = mXmppConnectionService.getIqParser().preKeyPublics(packet);
|
||
boolean flush = false;
|
||
if (bundle == null) {
|
||
Log.w(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received invalid bundle:" + packet);
|
||
bundle = new PreKeyBundle(-1, -1, -1, null, -1, null, null, null);
|
||
flush = true;
|
||
}
|
||
if (keys == null) {
|
||
Log.w(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received invalid prekeys:" + packet);
|
||
}
|
||
try {
|
||
boolean changed = false;
|
||
// Validate IdentityKey
|
||
IdentityKeyPair identityKeyPair = axolotlStore.getIdentityKeyPair();
|
||
if (flush || !identityKeyPair.getPublicKey().equals(bundle.getIdentityKey())) {
|
||
Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Adding own IdentityKey " + identityKeyPair.getPublicKey() + " to PEP.");
|
||
changed = true;
|
||
}
|
||
|
||
// Validate signedPreKeyRecord + ID
|
||
SignedPreKeyRecord signedPreKeyRecord;
|
||
int numSignedPreKeys = axolotlStore.getSignedPreKeysCount();
|
||
try {
|
||
signedPreKeyRecord = axolotlStore.loadSignedPreKey(bundle.getSignedPreKeyId());
|
||
if (flush
|
||
|| !bundle.getSignedPreKey().equals(signedPreKeyRecord.getKeyPair().getPublicKey())
|
||
|| !Arrays.equals(bundle.getSignedPreKeySignature(), signedPreKeyRecord.getSignature())) {
|
||
Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Adding new signedPreKey with ID " + (numSignedPreKeys + 1) + " to PEP.");
|
||
signedPreKeyRecord = KeyHelper.generateSignedPreKey(identityKeyPair, numSignedPreKeys + 1);
|
||
axolotlStore.storeSignedPreKey(signedPreKeyRecord.getId(), signedPreKeyRecord);
|
||
changed = true;
|
||
}
|
||
} catch (InvalidKeyIdException e) {
|
||
Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Adding new signedPreKey with ID " + (numSignedPreKeys + 1) + " to PEP.");
|
||
signedPreKeyRecord = KeyHelper.generateSignedPreKey(identityKeyPair, numSignedPreKeys + 1);
|
||
axolotlStore.storeSignedPreKey(signedPreKeyRecord.getId(), signedPreKeyRecord);
|
||
changed = true;
|
||
}
|
||
|
||
// Validate PreKeys
|
||
Set<PreKeyRecord> preKeyRecords = new HashSet<>();
|
||
if (keys != null) {
|
||
for (Integer id : keys.keySet()) {
|
||
try {
|
||
PreKeyRecord preKeyRecord = axolotlStore.loadPreKey(id);
|
||
if (preKeyRecord.getKeyPair().getPublicKey().equals(keys.get(id))) {
|
||
preKeyRecords.add(preKeyRecord);
|
||
}
|
||
} catch (InvalidKeyIdException ignored) {
|
||
}
|
||
}
|
||
}
|
||
int newKeys = NUM_KEYS_TO_PUBLISH - preKeyRecords.size();
|
||
if (newKeys > 0) {
|
||
List<PreKeyRecord> newRecords = KeyHelper.generatePreKeys(
|
||
axolotlStore.getCurrentPreKeyId() + 1, newKeys);
|
||
preKeyRecords.addAll(newRecords);
|
||
for (PreKeyRecord record : newRecords) {
|
||
axolotlStore.storePreKey(record.getId(), record);
|
||
}
|
||
changed = true;
|
||
Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Adding " + newKeys + " new preKeys to PEP.");
|
||
}
|
||
|
||
|
||
if (changed || changeAccessMode.get()) {
|
||
if (account.getPrivateKeyAlias() != null && Config.X509_VERIFICATION) {
|
||
mXmppConnectionService.publishDisplayName(account);
|
||
publishDeviceVerificationAndBundle(signedPreKeyRecord, preKeyRecords, announce, wipe);
|
||
} else {
|
||
publishDeviceBundle(signedPreKeyRecord, preKeyRecords, announce, wipe);
|
||
}
|
||
} else {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "Bundle " + getOwnDeviceId() + " in PEP was current");
|
||
if (wipe) {
|
||
wipeOtherPepDevices();
|
||
} else if (announce) {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "Announcing device " + getOwnDeviceId());
|
||
publishOwnDeviceIdIfNeeded();
|
||
}
|
||
}
|
||
} catch (InvalidKeyException e) {
|
||
Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Failed to publish bundle " + getOwnDeviceId() + ", reason: " + e.getMessage());
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
private void publishDeviceBundle(SignedPreKeyRecord signedPreKeyRecord,
|
||
Set<PreKeyRecord> preKeyRecords,
|
||
final boolean announceAfter,
|
||
final boolean wipe) {
|
||
publishDeviceBundle(signedPreKeyRecord, preKeyRecords, announceAfter, wipe, true);
|
||
}
|
||
|
||
private void publishDeviceBundle(final SignedPreKeyRecord signedPreKeyRecord,
|
||
final Set<PreKeyRecord> preKeyRecords,
|
||
final boolean announceAfter,
|
||
final boolean wipe,
|
||
final boolean firstAttempt) {
|
||
final Bundle publishOptions = account.getXmppConnection().getFeatures().pepPublishOptions() ? PublishOptions.openAccess() : null;
|
||
IqPacket publish = mXmppConnectionService.getIqGenerator().publishBundles(
|
||
signedPreKeyRecord, axolotlStore.getIdentityKeyPair().getPublicKey(),
|
||
preKeyRecords, getOwnDeviceId(), publishOptions);
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + ": Bundle " + getOwnDeviceId() + " in PEP not current. Publishing...");
|
||
mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() {
|
||
@Override
|
||
public void onIqPacketReceived(final Account account, IqPacket packet) {
|
||
Element error = packet.getType() == IqPacket.TYPE.ERROR ? packet.findChild("error") : null;
|
||
if (firstAttempt && error != null && error.hasChild("precondition-not-met", Namespace.PUBSUB_ERROR)) {
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": precondition wasn't met for bundle. pushing node configuration");
|
||
final String node = AxolotlService.PEP_BUNDLES + ":" + getOwnDeviceId();
|
||
mXmppConnectionService.pushNodeConfiguration(account, node, publishOptions, new XmppConnectionService.OnConfigurationPushed() {
|
||
@Override
|
||
public void onPushSucceeded() {
|
||
publishDeviceBundle(signedPreKeyRecord, preKeyRecords, announceAfter, wipe, false);
|
||
}
|
||
|
||
@Override
|
||
public void onPushFailed() {
|
||
publishDeviceBundle(signedPreKeyRecord, preKeyRecords, announceAfter, wipe, false);
|
||
}
|
||
});
|
||
} else if (packet.getType() == IqPacket.TYPE.RESULT) {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Successfully published bundle. ");
|
||
if (wipe) {
|
||
wipeOtherPepDevices();
|
||
} else if (announceAfter) {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "Announcing device " + getOwnDeviceId());
|
||
publishOwnDeviceIdIfNeeded();
|
||
}
|
||
} else if (packet.getType() == IqPacket.TYPE.ERROR) {
|
||
pepBroken = true;
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "Error received while publishing bundle: " + packet.findChild("error"));
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
public enum AxolotlCapability {
|
||
FULL,
|
||
MISSING_PRESENCE,
|
||
MISSING_KEYS,
|
||
WRONG_CONFIGURATION,
|
||
NO_MEMBERS
|
||
}
|
||
|
||
public boolean isConversationAxolotlCapable(Conversation conversation) {
|
||
return conversation.getMode() == Conversation.MODE_SINGLE || (conversation.getMucOptions().nonanonymous() && conversation.getMucOptions().membersOnly());
|
||
}
|
||
|
||
public Pair<AxolotlCapability, Jid> isConversationAxolotlCapableDetailed(Conversation conversation) {
|
||
if (conversation.getMode() == Conversation.MODE_SINGLE
|
||
|| (conversation.getMucOptions().membersOnly() && conversation.getMucOptions().nonanonymous())) {
|
||
final List<Jid> jids = getCryptoTargets(conversation);
|
||
for (Jid jid : jids) {
|
||
if (!hasAny(jid) && (!deviceIds.containsKey(jid) || deviceIds.get(jid).isEmpty())) {
|
||
if (conversation.getAccount().getRoster().getContact(jid).mutualPresenceSubscription()) {
|
||
return new Pair<>(AxolotlCapability.MISSING_KEYS, jid);
|
||
} else {
|
||
return new Pair<>(AxolotlCapability.MISSING_PRESENCE, jid);
|
||
}
|
||
}
|
||
}
|
||
if (jids.size() > 0) {
|
||
return new Pair<>(AxolotlCapability.FULL, null);
|
||
} else {
|
||
return new Pair<>(AxolotlCapability.NO_MEMBERS, null);
|
||
}
|
||
} else {
|
||
return new Pair<>(AxolotlCapability.WRONG_CONFIGURATION, null);
|
||
}
|
||
}
|
||
|
||
public List<Jid> getCryptoTargets(Conversation conversation) {
|
||
final List<Jid> jids;
|
||
if (conversation.getMode() == Conversation.MODE_SINGLE) {
|
||
jids = new ArrayList<>();
|
||
jids.add(conversation.getJid().toBareJid());
|
||
} else {
|
||
jids = conversation.getMucOptions().getMembers();
|
||
}
|
||
return jids;
|
||
}
|
||
|
||
public FingerprintStatus getFingerprintTrust(String fingerprint) {
|
||
return axolotlStore.getFingerprintStatus(fingerprint);
|
||
}
|
||
|
||
public X509Certificate getFingerprintCertificate(String fingerprint) {
|
||
return axolotlStore.getFingerprintCertificate(fingerprint);
|
||
}
|
||
|
||
public void setFingerprintTrust(String fingerprint, FingerprintStatus status) {
|
||
axolotlStore.setFingerprintStatus(fingerprint, status);
|
||
}
|
||
|
||
private void verifySessionWithPEP(final XmppAxolotlSession session) {
|
||
Log.d(Config.LOGTAG, "trying to verify fresh session (" + session.getRemoteAddress().getName() + ") with pep");
|
||
final SignalProtocolAddress address = session.getRemoteAddress();
|
||
final IdentityKey identityKey = session.getIdentityKey();
|
||
try {
|
||
IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveVerificationForDevice(Jid.fromString(address.getName()), address.getDeviceId());
|
||
mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
|
||
@Override
|
||
public void onIqPacketReceived(Account account, IqPacket packet) {
|
||
Pair<X509Certificate[], byte[]> verification = mXmppConnectionService.getIqParser().verification(packet);
|
||
if (verification != null) {
|
||
try {
|
||
Signature verifier = Signature.getInstance("sha256WithRSA");
|
||
verifier.initVerify(verification.first[0]);
|
||
verifier.update(identityKey.serialize());
|
||
if (verifier.verify(verification.second)) {
|
||
try {
|
||
mXmppConnectionService.getMemorizingTrustManager().getNonInteractive().checkClientTrusted(verification.first, "RSA");
|
||
String fingerprint = session.getFingerprint();
|
||
Log.d(Config.LOGTAG, "verified session with x.509 signature. fingerprint was: " + fingerprint);
|
||
setFingerprintTrust(fingerprint, FingerprintStatus.createActiveVerified(true));
|
||
axolotlStore.setFingerprintCertificate(fingerprint, verification.first[0]);
|
||
fetchStatusMap.put(address, FetchStatus.SUCCESS_VERIFIED);
|
||
Bundle information = CryptoHelper.extractCertificateInformation(verification.first[0]);
|
||
try {
|
||
final String cn = information.getString("subject_cn");
|
||
final Jid jid = Jid.fromString(address.getName());
|
||
Log.d(Config.LOGTAG, "setting common name for " + jid + " to " + cn);
|
||
account.getRoster().getContact(jid).setCommonName(cn);
|
||
} catch (final InvalidJidException ignored) {
|
||
//ignored
|
||
}
|
||
finishBuildingSessionsFromPEP(address);
|
||
return;
|
||
} catch (Exception e) {
|
||
Log.d(Config.LOGTAG, "could not verify certificate");
|
||
}
|
||
}
|
||
} catch (Exception e) {
|
||
Log.d(Config.LOGTAG, "error during verification " + e.getMessage());
|
||
}
|
||
} else {
|
||
Log.d(Config.LOGTAG, "no verification found");
|
||
}
|
||
fetchStatusMap.put(address, FetchStatus.SUCCESS);
|
||
finishBuildingSessionsFromPEP(address);
|
||
}
|
||
});
|
||
} catch (InvalidJidException e) {
|
||
fetchStatusMap.put(address, FetchStatus.SUCCESS);
|
||
finishBuildingSessionsFromPEP(address);
|
||
}
|
||
}
|
||
|
||
private final Set<Integer> PREVIOUSLY_REMOVED_FROM_ANNOUNCEMENT = new HashSet<>();
|
||
|
||
private void finishBuildingSessionsFromPEP(final SignalProtocolAddress address) {
|
||
SignalProtocolAddress ownAddress = new SignalProtocolAddress(account.getJid().toBareJid().toPreppedString(), 0);
|
||
Map<Integer, FetchStatus> own = fetchStatusMap.getAll(ownAddress.getName());
|
||
Map<Integer, FetchStatus> remote = fetchStatusMap.getAll(address.getName());
|
||
if (!own.containsValue(FetchStatus.PENDING) && !remote.containsValue(FetchStatus.PENDING)) {
|
||
FetchStatus report = null;
|
||
if (own.containsValue(FetchStatus.SUCCESS) || remote.containsValue(FetchStatus.SUCCESS)) {
|
||
report = FetchStatus.SUCCESS;
|
||
} else if (own.containsValue(FetchStatus.SUCCESS_VERIFIED) || remote.containsValue(FetchStatus.SUCCESS_VERIFIED)) {
|
||
report = FetchStatus.SUCCESS_VERIFIED;
|
||
} else if (own.containsValue(FetchStatus.SUCCESS_TRUSTED) || remote.containsValue(FetchStatus.SUCCESS_TRUSTED)) {
|
||
report = FetchStatus.SUCCESS_TRUSTED;
|
||
} else if (own.containsValue(FetchStatus.ERROR) || remote.containsValue(FetchStatus.ERROR)) {
|
||
report = FetchStatus.ERROR;
|
||
}
|
||
mXmppConnectionService.keyStatusUpdated(report);
|
||
}
|
||
if (Config.REMOVE_BROKEN_DEVICES) {
|
||
Set<Integer> ownDeviceIds = new HashSet<>(getOwnDeviceIds());
|
||
boolean publish = false;
|
||
for (Map.Entry<Integer, FetchStatus> entry : own.entrySet()) {
|
||
int id = entry.getKey();
|
||
if (entry.getValue() == FetchStatus.ERROR && PREVIOUSLY_REMOVED_FROM_ANNOUNCEMENT.add(id) && ownDeviceIds.remove(id)) {
|
||
publish = true;
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": error fetching own device with id " + id + ". removing from announcement");
|
||
}
|
||
}
|
||
if (publish) {
|
||
publishOwnDeviceId(ownDeviceIds);
|
||
}
|
||
}
|
||
}
|
||
|
||
public boolean hasEmptyDeviceList(Jid jid) {
|
||
return !hasAny(jid) && (!deviceIds.containsKey(jid) || deviceIds.get(jid).isEmpty());
|
||
}
|
||
|
||
public interface OnDeviceIdsFetched {
|
||
void fetched(Jid jid, Set<Integer> deviceIds);
|
||
}
|
||
|
||
public interface OnMultipleDeviceIdFetched {
|
||
void fetched();
|
||
}
|
||
|
||
public void fetchDeviceIds(final Jid jid) {
|
||
fetchDeviceIds(jid, null);
|
||
}
|
||
|
||
public void fetchDeviceIds(final Jid jid, OnDeviceIdsFetched callback) {
|
||
synchronized (this.fetchDeviceIdsMap) {
|
||
List<OnDeviceIdsFetched> callbacks = this.fetchDeviceIdsMap.get(jid);
|
||
if (callbacks != null) {
|
||
if (callback != null) {
|
||
callbacks.add(callback);
|
||
}
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching device ids for " + jid + " already running. adding callback");
|
||
} else {
|
||
callbacks = new ArrayList<>();
|
||
if (callback != null) {
|
||
callbacks.add(callback);
|
||
}
|
||
this.fetchDeviceIdsMap.put(jid, callbacks);
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching device ids for " + jid);
|
||
IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveDeviceIds(jid);
|
||
mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
|
||
@Override
|
||
public void onIqPacketReceived(Account account, IqPacket packet) {
|
||
synchronized (fetchDeviceIdsMap) {
|
||
List<OnDeviceIdsFetched> callbacks = fetchDeviceIdsMap.remove(jid);
|
||
if (packet.getType() == IqPacket.TYPE.RESULT) {
|
||
Element item = mXmppConnectionService.getIqParser().getItem(packet);
|
||
Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
|
||
registerDevices(jid, deviceIds);
|
||
if (callbacks != null) {
|
||
for (OnDeviceIdsFetched callback : callbacks) {
|
||
callback.fetched(jid, deviceIds);
|
||
}
|
||
}
|
||
} else {
|
||
Log.d(Config.LOGTAG, packet.toString());
|
||
if (callbacks != null) {
|
||
for (OnDeviceIdsFetched callback : callbacks) {
|
||
callback.fetched(jid, null);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
});
|
||
}
|
||
}
|
||
}
|
||
|
||
private void fetchDeviceIds(List<Jid> jids, final OnMultipleDeviceIdFetched callback) {
|
||
final ArrayList<Jid> unfinishedJids = new ArrayList<>(jids);
|
||
synchronized (unfinishedJids) {
|
||
for (Jid jid : unfinishedJids) {
|
||
fetchDeviceIds(jid, new OnDeviceIdsFetched() {
|
||
@Override
|
||
public void fetched(Jid jid, Set<Integer> deviceIds) {
|
||
synchronized (unfinishedJids) {
|
||
unfinishedJids.remove(jid);
|
||
if (unfinishedJids.size() == 0 && callback != null) {
|
||
callback.fetched();
|
||
}
|
||
}
|
||
}
|
||
});
|
||
}
|
||
}
|
||
}
|
||
|
||
private void buildSessionFromPEP(final SignalProtocolAddress address) {
|
||
Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building new session for " + address.toString());
|
||
if (address.equals(getOwnAxolotlAddress())) {
|
||
throw new AssertionError("We should NEVER build a session with ourselves. What happened here?!");
|
||
}
|
||
|
||
try {
|
||
IqPacket bundlesPacket = mXmppConnectionService.getIqGenerator().retrieveBundlesForDevice(
|
||
Jid.fromString(address.getName()), address.getDeviceId());
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Retrieving bundle: " + bundlesPacket);
|
||
mXmppConnectionService.sendIqPacket(account, bundlesPacket, new OnIqPacketReceived() {
|
||
|
||
@Override
|
||
public void onIqPacketReceived(Account account, IqPacket packet) {
|
||
if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
|
||
fetchStatusMap.put(address, FetchStatus.TIMEOUT);
|
||
} else if (packet.getType() == IqPacket.TYPE.RESULT) {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received preKey IQ packet, processing...");
|
||
final IqParser parser = mXmppConnectionService.getIqParser();
|
||
final List<PreKeyBundle> preKeyBundleList = parser.preKeys(packet);
|
||
final PreKeyBundle bundle = parser.bundle(packet);
|
||
if (preKeyBundleList.isEmpty() || bundle == null) {
|
||
Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "preKey IQ packet invalid: " + packet);
|
||
fetchStatusMap.put(address, FetchStatus.ERROR);
|
||
finishBuildingSessionsFromPEP(address);
|
||
return;
|
||
}
|
||
Random random = new Random();
|
||
final PreKeyBundle preKey = preKeyBundleList.get(random.nextInt(preKeyBundleList.size()));
|
||
if (preKey == null) {
|
||
//should never happen
|
||
fetchStatusMap.put(address, FetchStatus.ERROR);
|
||
finishBuildingSessionsFromPEP(address);
|
||
return;
|
||
}
|
||
|
||
final PreKeyBundle preKeyBundle = new PreKeyBundle(0, address.getDeviceId(),
|
||
preKey.getPreKeyId(), preKey.getPreKey(),
|
||
bundle.getSignedPreKeyId(), bundle.getSignedPreKey(),
|
||
bundle.getSignedPreKeySignature(), bundle.getIdentityKey());
|
||
|
||
try {
|
||
SessionBuilder builder = new SessionBuilder(axolotlStore, address);
|
||
builder.process(preKeyBundle);
|
||
XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, bundle.getIdentityKey());
|
||
sessions.put(address, session);
|
||
if (Config.X509_VERIFICATION) {
|
||
verifySessionWithPEP(session);
|
||
} else {
|
||
FingerprintStatus status = getFingerprintTrust(CryptoHelper.bytesToHex(bundle.getIdentityKey().getPublicKey().serialize()));
|
||
FetchStatus fetchStatus;
|
||
if (status != null && status.isVerified()) {
|
||
fetchStatus = FetchStatus.SUCCESS_VERIFIED;
|
||
} else if (status != null && status.isTrusted()) {
|
||
fetchStatus = FetchStatus.SUCCESS_TRUSTED;
|
||
} else {
|
||
fetchStatus = FetchStatus.SUCCESS;
|
||
}
|
||
fetchStatusMap.put(address, fetchStatus);
|
||
finishBuildingSessionsFromPEP(address);
|
||
}
|
||
} catch (UntrustedIdentityException | InvalidKeyException e) {
|
||
Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Error building session for " + address + ": "
|
||
+ e.getClass().getName() + ", " + e.getMessage());
|
||
fetchStatusMap.put(address, FetchStatus.ERROR);
|
||
finishBuildingSessionsFromPEP(address);
|
||
}
|
||
} else {
|
||
fetchStatusMap.put(address, FetchStatus.ERROR);
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "Error received while building session:" + packet.findChild("error"));
|
||
finishBuildingSessionsFromPEP(address);
|
||
}
|
||
}
|
||
});
|
||
} catch (InvalidJidException e) {
|
||
Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Got address with invalid jid: " + address.getName());
|
||
}
|
||
}
|
||
|
||
public Set<SignalProtocolAddress> findDevicesWithoutSession(final Conversation conversation) {
|
||
Set<SignalProtocolAddress> addresses = new HashSet<>();
|
||
for (Jid jid : getCryptoTargets(conversation)) {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Finding devices without session for " + jid);
|
||
if (deviceIds.get(jid) != null) {
|
||
for (Integer foreignId : this.deviceIds.get(jid)) {
|
||
SignalProtocolAddress address = new SignalProtocolAddress(jid.toPreppedString(), foreignId);
|
||
if (sessions.get(address) == null) {
|
||
IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
|
||
if (identityKey != null) {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Already have session for " + address.toString() + ", adding to cache...");
|
||
XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, identityKey);
|
||
sessions.put(address, session);
|
||
} else {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Found device " + jid + ":" + foreignId);
|
||
if (fetchStatusMap.get(address) != FetchStatus.ERROR) {
|
||
addresses.add(address);
|
||
} else {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "skipping over " + address + " because it's broken");
|
||
}
|
||
}
|
||
}
|
||
}
|
||
} else {
|
||
mXmppConnectionService.keyStatusUpdated(FetchStatus.ERROR);
|
||
Log.w(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Have no target devices in PEP!");
|
||
}
|
||
}
|
||
if (deviceIds.get(account.getJid().toBareJid()) != null) {
|
||
for (Integer ownId : this.deviceIds.get(account.getJid().toBareJid())) {
|
||
SignalProtocolAddress address = new SignalProtocolAddress(account.getJid().toBareJid().toPreppedString(), ownId);
|
||
if (sessions.get(address) == null) {
|
||
IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
|
||
if (identityKey != null) {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Already have session for " + address.toString() + ", adding to cache...");
|
||
XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, identityKey);
|
||
sessions.put(address, session);
|
||
} else {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Found device " + account.getJid().toBareJid() + ":" + ownId);
|
||
if (fetchStatusMap.get(address) != FetchStatus.ERROR) {
|
||
addresses.add(address);
|
||
} else {
|
||
Log.d(Config.LOGTAG, getLogprefix(account) + "skipping over " + address + " because it's broken");
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return addresses;
|
||
}
|
||
|
||
public boolean createSessionsIfNeeded(final Conversation conversation) {
|
||
final List<Jid> jidsWithEmptyDeviceList = getCryptoTargets(conversation);
|
||
for (Iterator<Jid> iterator = jidsWithEmptyDeviceList.iterator(); iterator.hasNext(); ) {
|
||
final Jid jid = iterator.next();
|
||
if (!hasEmptyDeviceList(jid)) {
|
||
iterator.remove();
|
||
}
|
||
}
|
||
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": createSessionsIfNeeded() - jids with empty device list: " + jidsWithEmptyDeviceList);
|
||
if (jidsWithEmptyDeviceList.size() > 0) {
|
||
fetchDeviceIds(jidsWithEmptyDeviceList, new OnMultipleDeviceIdFetched() {
|
||
@Override
|
||
public void fetched() {
|
||
createSessionsIfNeededActual(conversation);
|
||
}
|
||
});
|
||
return true;
|
||
} else {
|
||
return createSessionsIfNeededActual(conversation);
|
||
}
|
||
}
|
||
|
||
private boolean createSessionsIfNeededActual(final Conversation conversation) {
|
||
Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Creating axolotl sessions if needed...");
|
||
boolean newSessions = false;
|
||
Set<SignalProtocolAddress> addresses = findDevicesWithoutSession(conversation);
|
||
for (SignalProtocolAddress address : addresses) {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Processing device: " + address.toString());
|
||
FetchStatus status = fetchStatusMap.get(address);
|
||
if (status == null || status == FetchStatus.TIMEOUT) {
|
||
fetchStatusMap.put(address, FetchStatus.PENDING);
|
||
this.buildSessionFromPEP(address);
|
||
newSessions = true;
|
||
} else if (status == FetchStatus.PENDING) {
|
||
newSessions = true;
|
||
} else {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Already fetching bundle for " + address.toString());
|
||
}
|
||
}
|
||
|
||
return newSessions;
|
||
}
|
||
|
||
public boolean trustedSessionVerified(final Conversation conversation) {
|
||
Set<XmppAxolotlSession> sessions = findSessionsForConversation(conversation);
|
||
sessions.addAll(findOwnSessions());
|
||
boolean verified = false;
|
||
for (XmppAxolotlSession session : sessions) {
|
||
if (session.getTrust().isTrustedAndActive()) {
|
||
if (session.getTrust().getTrust() == FingerprintStatus.Trust.VERIFIED_X509) {
|
||
verified = true;
|
||
} else {
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
return verified;
|
||
}
|
||
|
||
public boolean hasPendingKeyFetches(Account account, List<Jid> jids) {
|
||
SignalProtocolAddress ownAddress = new SignalProtocolAddress(account.getJid().toBareJid().toPreppedString(), 0);
|
||
if (fetchStatusMap.getAll(ownAddress.getName()).containsValue(FetchStatus.PENDING)) {
|
||
return true;
|
||
}
|
||
synchronized (this.fetchDeviceIdsMap) {
|
||
for (Jid jid : jids) {
|
||
SignalProtocolAddress foreignAddress = new SignalProtocolAddress(jid.toBareJid().toPreppedString(), 0);
|
||
if (fetchStatusMap.getAll(foreignAddress.getName()).containsValue(FetchStatus.PENDING) || this.fetchDeviceIdsMap.containsKey(jid)) {
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
@Nullable
|
||
private boolean buildHeader(XmppAxolotlMessage axolotlMessage, Conversation conversation) {
|
||
Set<XmppAxolotlSession> remoteSessions = findSessionsForConversation(conversation);
|
||
Collection<XmppAxolotlSession> ownSessions = findOwnSessions();
|
||
if (remoteSessions.isEmpty()) {
|
||
return false;
|
||
}
|
||
for (XmppAxolotlSession session : remoteSessions) {
|
||
axolotlMessage.addDevice(session);
|
||
}
|
||
for (XmppAxolotlSession session : ownSessions) {
|
||
axolotlMessage.addDevice(session);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
@Nullable
|
||
public XmppAxolotlMessage encrypt(Message message) {
|
||
final XmppAxolotlMessage axolotlMessage = new XmppAxolotlMessage(account.getJid().toBareJid(), getOwnDeviceId());
|
||
final String content;
|
||
if (message.hasFileOnRemoteHost()) {
|
||
content = message.getFileParams().url.toString();
|
||
} else {
|
||
content = message.getBody();
|
||
}
|
||
try {
|
||
axolotlMessage.encrypt(content);
|
||
} catch (CryptoFailedException e) {
|
||
Log.w(Config.LOGTAG, getLogprefix(account) + "Failed to encrypt message: " + e.getMessage());
|
||
return null;
|
||
}
|
||
//TODO: fix this for MUC PMs - Don't encrypt to all participants
|
||
if (!buildHeader(axolotlMessage, message.getConversation())) {
|
||
return null;
|
||
}
|
||
|
||
return axolotlMessage;
|
||
}
|
||
|
||
public void preparePayloadMessage(final Message message, final boolean delay) {
|
||
executor.execute(new Runnable() {
|
||
@Override
|
||
public void run() {
|
||
XmppAxolotlMessage axolotlMessage = encrypt(message);
|
||
if (axolotlMessage == null) {
|
||
mXmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
|
||
//mXmppConnectionService.updateConversationUi();
|
||
} else {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Generated message, caching: " + message.getUuid());
|
||
messageCache.put(message.getUuid(), axolotlMessage);
|
||
mXmppConnectionService.resendMessage(message, delay);
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
public void prepareKeyTransportMessage(final Conversation conversation, final OnMessageCreatedCallback onMessageCreatedCallback) {
|
||
executor.execute(new Runnable() {
|
||
@Override
|
||
public void run() {
|
||
final XmppAxolotlMessage axolotlMessage = new XmppAxolotlMessage(account.getJid().toBareJid(), getOwnDeviceId());
|
||
if (buildHeader(axolotlMessage, conversation)) {
|
||
onMessageCreatedCallback.run(axolotlMessage);
|
||
} else {
|
||
onMessageCreatedCallback.run(null);
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
public XmppAxolotlMessage fetchAxolotlMessageFromCache(Message message) {
|
||
XmppAxolotlMessage axolotlMessage = messageCache.get(message.getUuid());
|
||
if (axolotlMessage != null) {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Cache hit: " + message.getUuid());
|
||
messageCache.remove(message.getUuid());
|
||
} else {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Cache miss: " + message.getUuid());
|
||
}
|
||
return axolotlMessage;
|
||
}
|
||
|
||
private XmppAxolotlSession recreateUncachedSession(SignalProtocolAddress address) {
|
||
IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
|
||
return (identityKey != null)
|
||
? new XmppAxolotlSession(account, axolotlStore, address, identityKey)
|
||
: null;
|
||
}
|
||
|
||
private XmppAxolotlSession getReceivingSession(XmppAxolotlMessage message) {
|
||
SignalProtocolAddress senderAddress = new SignalProtocolAddress(message.getFrom().toPreppedString(),
|
||
message.getSenderDeviceId());
|
||
XmppAxolotlSession session = sessions.get(senderAddress);
|
||
if (session == null) {
|
||
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Account: " + account.getJid() + " No axolotl session found while parsing received message " + message);
|
||
session = recreateUncachedSession(senderAddress);
|
||
if (session == null) {
|
||
session = new XmppAxolotlSession(account, axolotlStore, senderAddress);
|
||
}
|
||
}
|
||
return session;
|
||
}
|
||
|
||
public XmppAxolotlMessage.XmppAxolotlPlaintextMessage processReceivingPayloadMessage(XmppAxolotlMessage message, boolean postponePreKeyMessageHandling) {
|
||
XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = null;
|
||
|
||
XmppAxolotlSession session = getReceivingSession(message);
|
||
try {
|
||
plaintextMessage = message.decrypt(session, getOwnDeviceId());
|
||
Integer preKeyId = session.getPreKeyIdAndReset();
|
||
if (preKeyId != null) {
|
||
postPreKeyMessageHandling(session, preKeyId, postponePreKeyMessageHandling);
|
||
}
|
||
} catch (CryptoFailedException e) {
|
||
Log.w(Config.LOGTAG, getLogprefix(account) + "Failed to decrypt message from " + message.getFrom() + ": " + e.getMessage());
|
||
}
|
||
|
||
if (session.isFresh() && plaintextMessage != null) {
|
||
putFreshSession(session);
|
||
}
|
||
|
||
return plaintextMessage;
|
||
}
|
||
|
||
private void postPreKeyMessageHandling(final XmppAxolotlSession session, int preKeyId, final boolean postpone) {
|
||
if (postpone) {
|
||
postponedSessions.add(session);
|
||
} else {
|
||
//TODO: do not republish if we already removed this preKeyId
|
||
publishBundlesIfNeeded(false, false);
|
||
completeSession(session);
|
||
}
|
||
}
|
||
|
||
public void processPostponed() {
|
||
if (postponedSessions.size() > 0) {
|
||
publishBundlesIfNeeded(false, false);
|
||
}
|
||
Iterator<XmppAxolotlSession> iterator = postponedSessions.iterator();
|
||
while (iterator.hasNext()) {
|
||
completeSession(iterator.next());
|
||
iterator.remove();
|
||
}
|
||
}
|
||
|
||
private void completeSession(XmppAxolotlSession session) {
|
||
final XmppAxolotlMessage axolotlMessage = new XmppAxolotlMessage(account.getJid().toBareJid(), getOwnDeviceId());
|
||
axolotlMessage.addDevice(session);
|
||
try {
|
||
Jid jid = Jid.fromString(session.getRemoteAddress().getName());
|
||
MessagePacket packet = mXmppConnectionService.getMessageGenerator().generateKeyTransportMessage(jid, axolotlMessage);
|
||
mXmppConnectionService.sendMessagePacket(account, packet);
|
||
} catch (InvalidJidException e) {
|
||
throw new Error("Remote addresses are created from jid and should convert back to jid", e);
|
||
}
|
||
}
|
||
|
||
|
||
public XmppAxolotlMessage.XmppAxolotlKeyTransportMessage processReceivingKeyTransportMessage(XmppAxolotlMessage message, final boolean postponePreKeyMessageHandling) {
|
||
XmppAxolotlMessage.XmppAxolotlKeyTransportMessage keyTransportMessage;
|
||
|
||
XmppAxolotlSession session = getReceivingSession(message);
|
||
try {
|
||
keyTransportMessage = message.getParameters(session, getOwnDeviceId());
|
||
Integer preKeyId = session.getPreKeyIdAndReset();
|
||
if (preKeyId != null) {
|
||
postPreKeyMessageHandling(session, preKeyId, postponePreKeyMessageHandling);
|
||
}
|
||
} catch (CryptoFailedException e) {
|
||
Log.d(Config.LOGTAG, "could not decrypt keyTransport message " + e.getMessage());
|
||
keyTransportMessage = null;
|
||
}
|
||
|
||
if (session.isFresh() && keyTransportMessage != null) {
|
||
putFreshSession(session);
|
||
}
|
||
|
||
return keyTransportMessage;
|
||
}
|
||
|
||
private void putFreshSession(XmppAxolotlSession session) {
|
||
Log.d(Config.LOGTAG, "put fresh session");
|
||
sessions.put(session);
|
||
if (Config.X509_VERIFICATION) {
|
||
if (session.getIdentityKey() != null) {
|
||
verifySessionWithPEP(session);
|
||
} else {
|
||
Log.e(Config.LOGTAG, account.getJid().toBareJid() + ": identity key was empty after reloading for x509 verification");
|
||
}
|
||
}
|
||
}
|
||
}
|