Examples with SessionKey net.i2p.data.SessionKey used on opensource projects

Example 36 with SessionKey

use of net.i2p.data.SessionKey in project i2p.i2p by i2p.

the class PacketBuilder method buildSessionDestroyPacket.

/**
 *  Build a destroy packet, which contains a header but no body.
 *  If the keys and ip/port are not yet set, this will return null.
 *
 *  @return packet or null
 *  @since 0.9.2
 */
public UDPPacket buildSessionDestroyPacket(InboundEstablishState peer) {
    SessionKey cipherKey = peer.getCipherKey();
    SessionKey macKey = peer.getMACKey();
    byte[] ip = peer.getSentIP();
    int port = peer.getSentPort();
    if (cipherKey == null || macKey == null || ip == null || port <= 0) {
        if (_log.shouldLog(Log.DEBUG))
            _log.debug("Cannot send destroy, incomplete " + peer);
        return null;
    }
    InetAddress addr;
    try {
        addr = InetAddress.getByAddress(ip);
    } catch (UnknownHostException uhe) {
        return null;
    }
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("building session destroy packet to " + peer);
    return buildSessionDestroyPacket(cipherKey, macKey, addr, port);
}

Example 37 with SessionKey

use of net.i2p.data.SessionKey in project i2p.i2p by i2p.

the class PacketBuilder method buildSessionDestroyPacket.

/**
 *  Build a destroy packet, which contains a header but no body.
 *  If the keys and ip/port are not yet set, this will return null.
 *
 *  @return packet or null
 *  @since 0.9.2
 */
public UDPPacket buildSessionDestroyPacket(OutboundEstablishState peer) {
    SessionKey cipherKey = peer.getCipherKey();
    SessionKey macKey = peer.getMACKey();
    byte[] ip = peer.getSentIP();
    int port = peer.getSentPort();
    if (cipherKey == null || macKey == null || ip == null || port <= 0) {
        if (_log.shouldLog(Log.DEBUG))
            _log.debug("Cannot send destroy, incomplete " + peer);
        return null;
    }
    InetAddress addr;
    try {
        addr = InetAddress.getByAddress(ip);
    } catch (UnknownHostException uhe) {
        return null;
    }
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("building session destroy packet to " + peer);
    return buildSessionDestroyPacket(cipherKey, macKey, addr, port);
}

Example 38 with SessionKey

use of net.i2p.data.SessionKey in project i2p.i2p by i2p.

the class PeerTestManager method receiveTestReply.

/**
 * Receive a PeerTest message which contains the correct nonce for our current
 * test. We are Alice.
 */
private synchronized void receiveTestReply(RemoteHostId from, UDPPacketReader.PeerTestReader testInfo) {
    _context.statManager().addRateData("udp.receiveTestReply", 1);
    PeerTestState test = _currentTest;
    if (expired())
        return;
    if (_currentTestComplete)
        return;
    if ((DataHelper.eq(from.getIP(), test.getBobIP().getAddress())) && (from.getPort() == test.getBobPort())) {
        // The reply is from Bob
        int ipSize = testInfo.readIPSize();
        boolean expectV6 = test.isIPv6();
        if ((!expectV6 && ipSize != 4) || (expectV6 && ipSize != 16)) {
            // To do: fix the bug.
            if (_log.shouldLog(Log.WARN))
                _log.warn("Bad IP length " + ipSize + " from bob's reply: " + from + ", " + testInfo);
            return;
        }
        byte[] ip = new byte[ipSize];
        testInfo.readIP(ip, 0);
        try {
            InetAddress addr = InetAddress.getByAddress(ip);
            test.setAliceIP(addr);
            test.setReceiveBobTime(_context.clock().now());
            int testPort = testInfo.readPort();
            if (testPort == 0)
                throw new UnknownHostException("port 0");
            test.setAlicePort(testPort);
            if (_log.shouldLog(Log.DEBUG))
                _log.debug("Receive test reply from Bob: " + test);
            if (test.getAlicePortFromCharlie() > 0)
                testComplete(true);
        } catch (UnknownHostException uhe) {
            if (_log.shouldLog(Log.WARN))
                _log.warn("Unable to get our IP (length " + ipSize + ") from bob's reply: " + from + ", " + testInfo, uhe);
            _context.statManager().addRateData("udp.testBadIP", 1);
        }
    } else {
        // The reply is from Charlie
        PeerState charlieSession = _transport.getPeerState(from);
        long recentBegin = _context.clock().now() - CHARLIE_RECENT_PERIOD;
        if ((charlieSession != null) && ((charlieSession.getLastACKSend() > recentBegin) || (charlieSession.getLastSendTime() > recentBegin))) {
            if (_log.shouldLog(Log.WARN))
                _log.warn("Bob chose a charlie we already have a session to, cancelling the test and rerunning (bob: " + _currentTest + ", charlie: " + from + ")");
            // why are we doing this instead of calling testComplete() ?
            _currentTestComplete = true;
            _context.statManager().addRateData("udp.statusKnownCharlie", 1);
            honorStatus(Status.UNKNOWN, test.isIPv6());
            _currentTest = null;
            return;
        }
        if (test.getReceiveCharlieTime() > 0) {
            // this is our second charlie, yay!
            try {
                int testPort = testInfo.readPort();
                if (testPort == 0)
                    throw new UnknownHostException("port 0");
                test.setAlicePortFromCharlie(testPort);
                byte[] ip = new byte[testInfo.readIPSize()];
                int ipSize = ip.length;
                boolean expectV6 = test.isIPv6();
                if ((!expectV6 && ipSize != 4) || (expectV6 && ipSize != 16))
                    throw new UnknownHostException("bad sz - expect v6? " + expectV6 + " act sz: " + ipSize);
                testInfo.readIP(ip, 0);
                InetAddress addr = InetAddress.getByAddress(ip);
                test.setAliceIPFromCharlie(addr);
                if (_log.shouldLog(Log.DEBUG))
                    _log.debug("Receive test reply from Charlie: " + test);
                if (test.getReceiveBobTime() > 0)
                    testComplete(true);
            } catch (UnknownHostException uhe) {
                if (_log.shouldLog(Log.ERROR))
                    _log.error("Charlie @ " + from + " said we were an invalid IP address: " + uhe.getMessage(), uhe);
                _context.statManager().addRateData("udp.testBadIP", 1);
            }
        } else {
            if (test.incrementPacketsRelayed() > MAX_RELAYED_PER_TEST_ALICE) {
                testComplete(false);
                if (_log.shouldLog(Log.WARN))
                    _log.warn("Sent too many packets on the test: " + test);
                return;
            }
            if (_log.shouldLog(Log.INFO) && charlieSession != null)
                _log.info("Bob chose a charlie we last acked " + DataHelper.formatDuration(_context.clock().now() - charlieSession.getLastACKSend()) + " last sent " + DataHelper.formatDuration(_context.clock().now() - charlieSession.getLastSendTime()) + " (bob: " + _currentTest + ", charlie: " + from + ")");
            // ok, first charlie.  send 'em a packet
            test.setReceiveCharlieTime(_context.clock().now());
            SessionKey charlieIntroKey = new SessionKey(new byte[SessionKey.KEYSIZE_BYTES]);
            testInfo.readIntroKey(charlieIntroKey.getData(), 0);
            test.setCharlieIntroKey(charlieIntroKey);
            try {
                test.setCharlieIP(InetAddress.getByAddress(from.getIP()));
                test.setCharliePort(from.getPort());
                if (_log.shouldLog(Log.DEBUG))
                    _log.debug("Receive test from Charlie: " + test);
                sendTestToCharlie();
            } catch (UnknownHostException uhe) {
                if (_log.shouldLog(Log.WARN))
                    _log.warn("Charlie's IP is b0rked: " + from + ": " + testInfo);
                _context.statManager().addRateData("udp.testBadIP", 1);
            }
        }
    }
}

Example 39 with SessionKey

use of net.i2p.data.SessionKey in project i2p.i2p by i2p.

the class PeerTestManager method receiveFromAliceAsCharlie.

/**
 * We are charlie, so send Alice her PeerTest message
 *
 * testInfo IP/port ignored
 * @param state non-null
 */
private void receiveFromAliceAsCharlie(RemoteHostId from, UDPPacketReader.PeerTestReader testInfo, long nonce, PeerTestState state) {
    long now = _context.clock().now();
    if (state.getReceiveAliceTime() > now - (RESEND_TIMEOUT / 2)) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("Too soon, not retransmitting: " + state);
        return;
    }
    if (state.incrementPacketsRelayed() > MAX_RELAYED_PER_TEST_CHARLIE) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("Too many, not retransmitting: " + state);
        return;
    }
    state.setReceiveAliceTime(now);
    try {
        InetAddress aliceIP = InetAddress.getByAddress(from.getIP());
        SessionKey aliceIntroKey = new SessionKey(new byte[SessionKey.KEYSIZE_BYTES]);
        testInfo.readIntroKey(aliceIntroKey.getData(), 0);
        UDPPacket packet = _packetBuilder.buildPeerTestToAlice(aliceIP, from.getPort(), aliceIntroKey, _transport.getIntroKey(), nonce);
        if (_log.shouldLog(Log.DEBUG))
            _log.debug("Receive from Alice: " + state);
        _transport.send(packet);
    } catch (UnknownHostException uhe) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("Unable to build the aliceIP from " + from, uhe);
        _context.statManager().addRateData("udp.testBadIP", 1);
    }
}

Example 40 with SessionKey

use of net.i2p.data.SessionKey in project i2p.i2p by i2p.

the class IndexBean method generateNewEncryptionKey.

/**
 * New key
 */
private String generateNewEncryptionKey() {
    TunnelController tun = getController(_tunnel);
    Properties config = getConfig();
    if (tun == null) {
        // creating new
        tun = new TunnelController(config, "", true);
        _group.addController(tun);
        saveChanges();
    } else if (tun.getIsRunning() || tun.getIsStarting()) {
        return "Tunnel must be stopped before modifying leaseset encryption key";
    }
    byte[] data = new byte[SessionKey.KEYSIZE_BYTES];
    _context.random().nextBytes(data);
    SessionKey sk = new SessionKey(data);
    setEncryptKey(sk.toBase64());
    setEncrypt("");
    saveChanges();
    return "New Leaseset Encryption Key: " + sk.toBase64();
}