@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;
}
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;
}
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 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 void put(XmppAxolotlSession session) {
this.put(session.getRemoteAddress(), session);
}
@Override
public void put(AxolotlAddress address, XmppAxolotlSession value) {
super.put(address, value);
value.setNotFresh();
xmppConnectionService.syncRosterToDisk(account);
}