diff options
Diffstat (limited to 'src/main/java/eu/siacs/conversations/crypto/axolotl/AxolotlService.java')
-rw-r--r-- | src/main/java/eu/siacs/conversations/crypto/axolotl/AxolotlService.java | 713 |
1 files changed, 713 insertions, 0 deletions
diff --git a/src/main/java/eu/siacs/conversations/crypto/axolotl/AxolotlService.java b/src/main/java/eu/siacs/conversations/crypto/axolotl/AxolotlService.java new file mode 100644 index 000000000..f3775b793 --- /dev/null +++ b/src/main/java/eu/siacs/conversations/crypto/axolotl/AxolotlService.java @@ -0,0 +1,713 @@ +package eu.siacs.conversations.crypto.axolotl; + +import android.support.annotation.NonNull; +import android.support.annotation.Nullable; +import android.util.Log; + +import org.bouncycastle.jce.provider.BouncyCastleProvider; +import org.whispersystems.libaxolotl.AxolotlAddress; +import org.whispersystems.libaxolotl.IdentityKey; +import org.whispersystems.libaxolotl.IdentityKeyPair; +import org.whispersystems.libaxolotl.InvalidKeyException; +import org.whispersystems.libaxolotl.InvalidKeyIdException; +import org.whispersystems.libaxolotl.SessionBuilder; +import org.whispersystems.libaxolotl.UntrustedIdentityException; +import org.whispersystems.libaxolotl.ecc.ECPublicKey; +import org.whispersystems.libaxolotl.state.PreKeyBundle; +import org.whispersystems.libaxolotl.state.PreKeyRecord; +import org.whispersystems.libaxolotl.state.SignedPreKeyRecord; +import org.whispersystems.libaxolotl.util.KeyHelper; + +import java.security.Security; +import java.util.Arrays; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Random; +import java.util.Set; + +import eu.siacs.conversations.Config; +import eu.siacs.conversations.entities.Account; +import eu.siacs.conversations.entities.Contact; +import eu.siacs.conversations.entities.Conversation; +import eu.siacs.conversations.entities.Message; +import eu.siacs.conversations.parser.IqParser; +import eu.siacs.conversations.services.XmppConnectionService; +import eu.siacs.conversations.utils.SerialSingleThreadExecutor; +import eu.siacs.conversations.xml.Element; +import eu.siacs.conversations.xmpp.OnIqPacketReceived; +import eu.siacs.conversations.xmpp.jid.InvalidJidException; +import eu.siacs.conversations.xmpp.jid.Jid; +import eu.siacs.conversations.xmpp.stanzas.IqPacket; + +public class AxolotlService { + + public static final String PEP_PREFIX = "eu.siacs.conversations.axolotl"; + public static final String PEP_DEVICE_LIST = PEP_PREFIX + ".devicelist"; + public static final String PEP_BUNDLES = PEP_PREFIX + ".bundles"; + + public static final String LOGPREFIX = "AxolotlService"; + + public static final int NUM_KEYS_TO_PUBLISH = 100; + + private final Account account; + private final XmppConnectionService mXmppConnectionService; + private final SQLiteAxolotlStore axolotlStore; + private final SessionMap sessions; + private final Map<Jid, Set<Integer>> deviceIds; + private final Map<String, XmppAxolotlMessage> messageCache; + private final FetchStatusMap fetchStatusMap; + private final SerialSingleThreadExecutor executor; + + private static class AxolotlAddressMap<T> { + protected Map<String, Map<Integer, T>> map; + protected final Object MAP_LOCK = new Object(); + + public AxolotlAddressMap() { + this.map = new HashMap<>(); + } + + public void put(AxolotlAddress address, T value) { + synchronized (MAP_LOCK) { + Map<Integer, T> devices = map.get(address.getName()); + if (devices == null) { + devices = new HashMap<>(); + map.put(address.getName(), devices); + } + devices.put(address.getDeviceId(), value); + } + } + + public T get(AxolotlAddress address) { + synchronized (MAP_LOCK) { + Map<Integer, T> devices = map.get(address.getName()); + if (devices == null) { + return null; + } + return devices.get(address.getDeviceId()); + } + } + + public Map<Integer, T> getAll(AxolotlAddress address) { + synchronized (MAP_LOCK) { + Map<Integer, T> devices = map.get(address.getName()); + if (devices == null) { + return new HashMap<>(); + } + return devices; + } + } + + public boolean hasAny(AxolotlAddress address) { + synchronized (MAP_LOCK) { + Map<Integer, T> devices = map.get(address.getName()); + return devices != null && !devices.isEmpty(); + } + } + + public void clear() { + map.clear(); + } + + } + + private static class SessionMap extends AxolotlAddressMap<XmppAxolotlSession> { + private final XmppConnectionService xmppConnectionService; + private final Account account; + + public SessionMap(XmppConnectionService service, SQLiteAxolotlStore store, Account account) { + super(); + this.xmppConnectionService = service; + this.account = account; + this.fillMap(store); + } + + private void putDevicesForJid(String bareJid, List<Integer> deviceIds, SQLiteAxolotlStore store) { + for (Integer deviceId : deviceIds) { + AxolotlAddress axolotlAddress = new AxolotlAddress(bareJid, deviceId); + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building session for remote address: " + axolotlAddress.toString()); + String fingerprint = store.loadSession(axolotlAddress).getSessionState().getRemoteIdentityKey().getFingerprint().replaceAll("\\s", ""); + this.put(axolotlAddress, new XmppAxolotlSession(account, store, axolotlAddress, fingerprint)); + } + } + + private void fillMap(SQLiteAxolotlStore store) { + List<Integer> deviceIds = store.getSubDeviceSessions(account.getJid().toBareJid().toString()); + putDevicesForJid(account.getJid().toBareJid().toString(), deviceIds, store); + for (Contact contact : account.getRoster().getContacts()) { + Jid bareJid = contact.getJid().toBareJid(); + if (bareJid == null) { + continue; // FIXME: handle this? + } + String address = bareJid.toString(); + deviceIds = store.getSubDeviceSessions(address); + putDevicesForJid(address, deviceIds, store); + } + + } + + @Override + public void put(AxolotlAddress address, XmppAxolotlSession value) { + super.put(address, value); + value.setNotFresh(); + xmppConnectionService.syncRosterToDisk(account); + } + + public void put(XmppAxolotlSession session) { + this.put(session.getRemoteAddress(), session); + } + } + + private static enum FetchStatus { + PENDING, + SUCCESS, + ERROR + } + + private static class FetchStatusMap extends AxolotlAddressMap<FetchStatus> { + + } + + public static String getLogprefix(Account account) { + return LOGPREFIX + " (" + account.getJid().toBareJid().toString() + "): "; + } + + public AxolotlService(Account account, XmppConnectionService connectionService) { + if (Security.getProvider("BC") == null) { + Security.addProvider(new BouncyCastleProvider()); + } + this.mXmppConnectionService = connectionService; + this.account = account; + this.axolotlStore = new SQLiteAxolotlStore(this.account, this.mXmppConnectionService); + this.deviceIds = new HashMap<>(); + this.messageCache = new HashMap<>(); + this.sessions = new SessionMap(mXmppConnectionService, axolotlStore, account); + this.fetchStatusMap = new FetchStatusMap(); + this.executor = new SerialSingleThreadExecutor(); + } + + public IdentityKey getOwnPublicKey() { + return axolotlStore.getIdentityKeyPair().getPublicKey(); + } + + public Set<IdentityKey> getKeysWithTrust(XmppAxolotlSession.Trust trust) { + return axolotlStore.getContactKeysWithTrust(account.getJid().toBareJid().toString(), trust); + } + + public Set<IdentityKey> getKeysWithTrust(XmppAxolotlSession.Trust trust, Contact contact) { + return axolotlStore.getContactKeysWithTrust(contact.getJid().toBareJid().toString(), trust); + } + + public long getNumTrustedKeys(Contact contact) { + return axolotlStore.getContactNumTrustedKeys(contact.getJid().toBareJid().toString()); + } + + private AxolotlAddress getAddressForJid(Jid jid) { + return new AxolotlAddress(jid.toString(), 0); + } + + private Set<XmppAxolotlSession> findOwnSessions() { + AxolotlAddress ownAddress = getAddressForJid(account.getJid().toBareJid()); + Set<XmppAxolotlSession> ownDeviceSessions = new HashSet<>(this.sessions.getAll(ownAddress).values()); + return ownDeviceSessions; + } + + private Set<XmppAxolotlSession> findSessionsforContact(Contact contact) { + AxolotlAddress contactAddress = getAddressForJid(contact.getJid()); + Set<XmppAxolotlSession> sessions = new HashSet<>(this.sessions.getAll(contactAddress).values()); + return sessions; + } + + private boolean hasAny(Contact contact) { + AxolotlAddress contactAddress = getAddressForJid(contact.getJid()); + return sessions.hasAny(contactAddress); + } + + public void regenerateKeys() { + axolotlStore.regenerate(); + sessions.clear(); + fetchStatusMap.clear(); + publishBundlesIfNeeded(); + publishOwnDeviceIdIfNeeded(); + } + + public int getOwnDeviceId() { + return axolotlStore.getLocalRegistrationId(); + } + + public Set<Integer> getOwnDeviceIds() { + return this.deviceIds.get(account.getJid().toBareJid()); + } + + private void setTrustOnSessions(final Jid jid, @NonNull final Set<Integer> deviceIds, + final XmppAxolotlSession.Trust from, + final XmppAxolotlSession.Trust to) { + for (Integer deviceId : deviceIds) { + AxolotlAddress address = new AxolotlAddress(jid.toBareJid().toString(), deviceId); + XmppAxolotlSession session = sessions.get(address); + if (session != null && session.getFingerprint() != null + && session.getTrust() == from) { + session.setTrust(to); + } + } + } + + public void registerDevices(final Jid jid, @NonNull final Set<Integer> deviceIds) { + if (jid.toBareJid().equals(account.getJid().toBareJid())) { + if (deviceIds.contains(getOwnDeviceId())) { + deviceIds.remove(getOwnDeviceId()); + } + for (Integer deviceId : deviceIds) { + AxolotlAddress ownDeviceAddress = new AxolotlAddress(jid.toBareJid().toString(), deviceId); + if (sessions.get(ownDeviceAddress) == null) { + buildSessionFromPEP(ownDeviceAddress); + } + } + } + Set<Integer> expiredDevices = new HashSet<>(axolotlStore.getSubDeviceSessions(jid.toBareJid().toString())); + expiredDevices.removeAll(deviceIds); + setTrustOnSessions(jid, expiredDevices, XmppAxolotlSession.Trust.TRUSTED, + XmppAxolotlSession.Trust.INACTIVE_TRUSTED); + setTrustOnSessions(jid, expiredDevices, XmppAxolotlSession.Trust.UNDECIDED, + XmppAxolotlSession.Trust.INACTIVE_UNDECIDED); + setTrustOnSessions(jid, expiredDevices, XmppAxolotlSession.Trust.UNTRUSTED, + XmppAxolotlSession.Trust.INACTIVE_UNTRUSTED); + Set<Integer> newDevices = new HashSet<>(deviceIds); + setTrustOnSessions(jid, newDevices, XmppAxolotlSession.Trust.INACTIVE_TRUSTED, + XmppAxolotlSession.Trust.TRUSTED); + setTrustOnSessions(jid, newDevices, XmppAxolotlSession.Trust.INACTIVE_UNDECIDED, + XmppAxolotlSession.Trust.UNDECIDED); + setTrustOnSessions(jid, newDevices, XmppAxolotlSession.Trust.INACTIVE_UNTRUSTED, + XmppAxolotlSession.Trust.UNTRUSTED); + this.deviceIds.put(jid, deviceIds); + mXmppConnectionService.keyStatusUpdated(); + publishOwnDeviceIdIfNeeded(); + } + + public void wipeOtherPepDevices() { + Set<Integer> deviceIds = new HashSet<>(); + deviceIds.add(getOwnDeviceId()); + IqPacket publish = mXmppConnectionService.getIqGenerator().publishDeviceIds(deviceIds); + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Wiping all other devices from Pep:" + publish); + mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() { + @Override + public void onIqPacketReceived(Account account, IqPacket packet) { + // TODO: implement this! + } + }); + } + + public void purgeKey(IdentityKey identityKey) { + axolotlStore.setFingerprintTrust(identityKey.getFingerprint().replaceAll("\\s", ""), XmppAxolotlSession.Trust.COMPROMISED); + } + + public void publishOwnDeviceIdIfNeeded() { + IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveDeviceIds(account.getJid().toBareJid()); + mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() { + @Override + public void onIqPacketReceived(Account account, IqPacket packet) { + Element item = mXmppConnectionService.getIqParser().getItem(packet); + Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item); + if (deviceIds == null) { + deviceIds = new HashSet<Integer>(); + } + if (!deviceIds.contains(getOwnDeviceId())) { + deviceIds.add(getOwnDeviceId()); + IqPacket publish = mXmppConnectionService.getIqGenerator().publishDeviceIds(deviceIds); + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Own device " + getOwnDeviceId() + " not in PEP devicelist. Publishing: " + publish); + mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() { + @Override + public void onIqPacketReceived(Account account, IqPacket packet) { + // TODO: implement this! + } + }); + } + } + }); + } + + public void publishBundlesIfNeeded() { + IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveBundlesForDevice(account.getJid().toBareJid(), getOwnDeviceId()); + mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() { + @Override + public void onIqPacketReceived(Account account, IqPacket packet) { + 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.loadSignedPreKeys().size(); + 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) { + IqPacket publish = mXmppConnectionService.getIqGenerator().publishBundles( + signedPreKeyRecord, axolotlStore.getIdentityKeyPair().getPublicKey(), + preKeyRecords, getOwnDeviceId()); + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + ": Bundle " + getOwnDeviceId() + " in PEP not current. Publishing: " + publish); + mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() { + @Override + public void onIqPacketReceived(Account account, IqPacket packet) { + // TODO: implement this! + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Published bundle, got: " + packet); + } + }); + } + } catch (InvalidKeyException e) { + Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Failed to publish bundle " + getOwnDeviceId() + ", reason: " + e.getMessage()); + return; + } + } + }); + } + + public boolean isContactAxolotlCapable(Contact contact) { + + Jid jid = contact.getJid().toBareJid(); + AxolotlAddress address = new AxolotlAddress(jid.toString(), 0); + return sessions.hasAny(address) || + (deviceIds.containsKey(jid) && !deviceIds.get(jid).isEmpty()); + } + + public XmppAxolotlSession.Trust getFingerprintTrust(String fingerprint) { + return axolotlStore.getFingerprintTrust(fingerprint); + } + + public void setFingerprintTrust(String fingerprint, XmppAxolotlSession.Trust trust) { + axolotlStore.setFingerprintTrust(fingerprint, trust); + } + + private void buildSessionFromPEP(final AxolotlAddress address) { + Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building new sesstion for " + address.getDeviceId()); + + 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() { + private void finish() { + AxolotlAddress ownAddress = new AxolotlAddress(account.getJid().toBareJid().toString(), 0); + if (!fetchStatusMap.getAll(ownAddress).containsValue(FetchStatus.PENDING) + && !fetchStatusMap.getAll(address).containsValue(FetchStatus.PENDING)) { + mXmppConnectionService.keyStatusUpdated(); + } + } + + @Override + public void onIqPacketReceived(Account account, IqPacket packet) { + 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); + finish(); + 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); + finish(); + return; + } + + final PreKeyBundle preKeyBundle = new PreKeyBundle(0, address.getDeviceId(), + preKey.getPreKeyId(), preKey.getPreKey(), + bundle.getSignedPreKeyId(), bundle.getSignedPreKey(), + bundle.getSignedPreKeySignature(), bundle.getIdentityKey()); + + axolotlStore.saveIdentity(address.getName(), bundle.getIdentityKey()); + + try { + SessionBuilder builder = new SessionBuilder(axolotlStore, address); + builder.process(preKeyBundle); + XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, bundle.getIdentityKey().getFingerprint().replaceAll("\\s", "")); + sessions.put(address, session); + fetchStatusMap.put(address, FetchStatus.SUCCESS); + } 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); + } + + finish(); + } + }); + } catch (InvalidJidException e) { + Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Got address with invalid jid: " + address.getName()); + } + } + + public Set<AxolotlAddress> findDevicesWithoutSession(final Conversation conversation) { + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Finding devices without session for " + conversation.getContact().getJid().toBareJid()); + Jid contactJid = conversation.getContact().getJid().toBareJid(); + Set<AxolotlAddress> addresses = new HashSet<>(); + if (deviceIds.get(contactJid) != null) { + for (Integer foreignId : this.deviceIds.get(contactJid)) { + AxolotlAddress address = new AxolotlAddress(contactJid.toString(), 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.getFingerprint().replaceAll("\\s", "")); + sessions.put(address, session); + } else { + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Found device " + account.getJid().toBareJid() + ":" + foreignId); + addresses.add(new AxolotlAddress(contactJid.toString(), foreignId)); + } + } + } + } else { + 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())) { + AxolotlAddress address = new AxolotlAddress(account.getJid().toBareJid().toString(), 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.getFingerprint().replaceAll("\\s", "")); + sessions.put(address, session); + } else { + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Found device " + account.getJid().toBareJid() + ":" + ownId); + addresses.add(new AxolotlAddress(account.getJid().toBareJid().toString(), ownId)); + } + } + } + } + + return addresses; + } + + public boolean createSessionsIfNeeded(final Conversation conversation) { + Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Creating axolotl sessions if needed..."); + boolean newSessions = false; + Set<AxolotlAddress> addresses = findDevicesWithoutSession(conversation); + for (AxolotlAddress address : addresses) { + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Processing device: " + address.toString()); + FetchStatus status = fetchStatusMap.get(address); + if (status == null || status == FetchStatus.ERROR) { + 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 hasPendingKeyFetches(Conversation conversation) { + AxolotlAddress ownAddress = new AxolotlAddress(account.getJid().toBareJid().toString(), 0); + AxolotlAddress foreignAddress = new AxolotlAddress(conversation.getJid().toBareJid().toString(), 0); + return fetchStatusMap.getAll(ownAddress).containsValue(FetchStatus.PENDING) + || fetchStatusMap.getAll(foreignAddress).containsValue(FetchStatus.PENDING); + + } + + @Nullable + private XmppAxolotlMessage buildHeader(Contact contact) { + final XmppAxolotlMessage axolotlMessage = new XmppAxolotlMessage( + contact.getJid().toBareJid(), getOwnDeviceId()); + + Set<XmppAxolotlSession> contactSessions = findSessionsforContact(contact); + Set<XmppAxolotlSession> ownSessions = findOwnSessions(); + if (contactSessions.isEmpty()) { + return null; + } + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building axolotl foreign keyElements..."); + for (XmppAxolotlSession session : contactSessions) { + Log.v(Config.LOGTAG, AxolotlService.getLogprefix(account) + session.getRemoteAddress().toString()); + axolotlMessage.addDevice(session); + } + Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building axolotl own keyElements..."); + for (XmppAxolotlSession session : ownSessions) { + Log.v(Config.LOGTAG, AxolotlService.getLogprefix(account) + session.getRemoteAddress().toString()); + axolotlMessage.addDevice(session); + } + + return axolotlMessage; + } + + @Nullable + public XmppAxolotlMessage encrypt(Message message) { + XmppAxolotlMessage axolotlMessage = buildHeader(message.getContact()); + + if (axolotlMessage != null) { + 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; + } + } + + 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 Contact contact, final OnMessageCreatedCallback onMessageCreatedCallback) { + executor.execute(new Runnable() { + @Override + public void run() { + XmppAxolotlMessage axolotlMessage = buildHeader(contact); + onMessageCreatedCallback.run(axolotlMessage); + } + }); + } + + 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(AxolotlAddress address) { + IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey(); + return (identityKey != null) + ? new XmppAxolotlSession(account, axolotlStore, address, + identityKey.getFingerprint().replaceAll("\\s", "")) + : null; + } + + private XmppAxolotlSession getReceivingSession(XmppAxolotlMessage message) { + AxolotlAddress senderAddress = new AxolotlAddress(message.getFrom().toString(), + 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) { + XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = null; + + XmppAxolotlSession session = getReceivingSession(message); + try { + plaintextMessage = message.decrypt(session, getOwnDeviceId()); + Integer preKeyId = session.getPreKeyId(); + if (preKeyId != null) { + publishBundlesIfNeeded(); + session.resetPreKeyId(); + } + } catch (CryptoFailedException e) { + Log.w(Config.LOGTAG, getLogprefix(account) + "Failed to decrypt message: " + e.getMessage()); + } + + if (session.isFresh() && plaintextMessage != null) { + sessions.put(session); + } + + return plaintextMessage; + } + + public XmppAxolotlMessage.XmppAxolotlKeyTransportMessage processReceivingKeyTransportMessage(XmppAxolotlMessage message) { + XmppAxolotlMessage.XmppAxolotlKeyTransportMessage keyTransportMessage = null; + + XmppAxolotlSession session = getReceivingSession(message); + keyTransportMessage = message.getParameters(session, getOwnDeviceId()); + + if (session.isFresh() && keyTransportMessage != null) { + sessions.put(session); + } + + return keyTransportMessage; + } +} |