Examples with TransientSessionKeyManager net.i2p.router.crypto.TransientSessionKeyManager used on opensource projects

Example 1 with TransientSessionKeyManager

use of net.i2p.router.crypto.TransientSessionKeyManager in project i2p.i2p by i2p.

the class ClientConnectionRunner method sessionEstablished.

/**
 *  Caller must send a SessionStatusMessage to the client with the returned code.
 *  Caller must call disconnectClient() on failure.
 *  Side effect: Sets the session ID.
 *
 *  @return SessionStatusMessage return code, 1 for success, != 1 for failure
 */
public int sessionEstablished(SessionConfig config) {
    Destination dest = config.getDestination();
    Hash destHash = dest.calculateHash();
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("SessionEstablished called for destination " + destHash);
    if (_sessions.size() > MAX_SESSIONS)
        return SessionStatusMessage.STATUS_REFUSED;
    boolean isPrimary = _sessions.isEmpty();
    if (!isPrimary) {
        // all encryption keys must be the same
        for (SessionParams sp : _sessions.values()) {
            if (!dest.getPublicKey().equals(sp.dest.getPublicKey()))
                return SessionStatusMessage.STATUS_INVALID;
        }
    }
    SessionParams sp = new SessionParams(dest, isPrimary);
    sp.config = config;
    SessionParams old = _sessions.putIfAbsent(destHash, sp);
    if (old != null)
        return SessionStatusMessage.STATUS_INVALID;
    // We process a few options here, but most are handled by the tunnel manager.
    // The ones here can't be changed later.
    Properties opts = config.getOptions();
    if (isPrimary && opts != null) {
        _dontSendMSM = "none".equals(opts.getProperty(I2PClient.PROP_RELIABILITY, "").toLowerCase(Locale.US));
        _dontSendMSMOnReceive = Boolean.parseBoolean(opts.getProperty(I2PClient.PROP_FAST_RECEIVE));
    }
    // per-destination session key manager to prevent rather easy correlation
    if (isPrimary && _sessionKeyManager == null) {
        int tags = TransientSessionKeyManager.DEFAULT_TAGS;
        int thresh = TransientSessionKeyManager.LOW_THRESHOLD;
        if (opts != null) {
            String ptags = opts.getProperty(PROP_TAGS);
            if (ptags != null) {
                try {
                    tags = Integer.parseInt(ptags);
                } catch (NumberFormatException nfe) {
                }
            }
            String pthresh = opts.getProperty(PROP_THRESH);
            if (pthresh != null) {
                try {
                    thresh = Integer.parseInt(pthresh);
                } catch (NumberFormatException nfe) {
                }
            }
        }
        _sessionKeyManager = new TransientSessionKeyManager(_context, tags, thresh);
    }
    return _manager.destinationEstablished(this, dest);
}