Examples with GarlicMessage net.i2p.data.i2np.GarlicMessage used on opensource projects

Example 1 with GarlicMessage

use of net.i2p.data.i2np.GarlicMessage in project i2p.i2p by i2p.

the class TestJob method sendTest.

private void sendTest(I2NPMessage m) {
    // garlic route that DeliveryStatusMessage to ourselves so the endpoints and gateways
    // can't tell its a test.  to simplify this, we encrypt it with a random key and tag,
    // remembering that key+tag so that we can decrypt it later.  this means we can do the
    // garlic encryption without any ElGamal (yay)
    PayloadGarlicConfig payload = new PayloadGarlicConfig();
    payload.setCertificate(Certificate.NULL_CERT);
    payload.setId(getContext().random().nextLong(I2NPMessage.MAX_ID_VALUE));
    payload.setPayload(m);
    payload.setRecipient(getContext().router().getRouterInfo());
    payload.setDeliveryInstructions(DeliveryInstructions.LOCAL);
    payload.setExpiration(m.getMessageExpiration());
    SessionKey encryptKey = getContext().keyGenerator().generateSessionKey();
    SessionTag encryptTag = new SessionTag(true);
    _encryptTag = encryptTag;
    SessionKey sentKey = new SessionKey();
    Set<SessionTag> sentTags = null;
    GarlicMessage msg = GarlicMessageBuilder.buildMessage(getContext(), payload, sentKey, sentTags, getContext().keyManager().getPublicKey(), encryptKey, encryptTag);
    if (msg == null) {
        // overloaded / unknown peers / etc
        scheduleRetest();
        return;
    }
    Set<SessionTag> encryptTags = new RemovableSingletonSet<SessionTag>(encryptTag);
    // Register the single tag with the appropriate SKM
    if (_cfg.isInbound() && !_pool.getSettings().isExploratory()) {
        SessionKeyManager skm = getContext().clientManager().getClientSessionKeyManager(_pool.getSettings().getDestination());
        if (skm != null)
            skm.tagsReceived(encryptKey, encryptTags);
    } else {
        getContext().sessionKeyManager().tagsReceived(encryptKey, encryptTags);
    }
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("Sending garlic test of " + _outTunnel + " / " + _replyTunnel);
    getContext().tunnelDispatcher().dispatchOutbound(msg, _outTunnel.getSendTunnelId(0), _replyTunnel.getReceiveTunnelId(0), _replyTunnel.getPeer(0));
}

Example 2 with GarlicMessage

use of net.i2p.data.i2np.GarlicMessage in project i2p.i2p by i2p.

the class GarlicMessageBuilder method buildClove.

/**
 *  UNUSED
 *
 *  The Garlic Message we are building contains another garlic message,
 *  as specified by a GarlicConfig (NOT a PayloadGarlicConfig).
 *
 *  So this calls back to the top, to buildMessage(ctx, config),
 *  which uses the router's SKM, i.e. the wrong one.
 *  Unfortunately we've lost the reference to the SessionKeyManager way down here,
 *  so we can't call buildMessage(ctx, config, key, tags, skm).
 *
 *  If we do ever end up constructing a garlic message that contains a garlic message,
 *  we'll have to fix this by passing the skm through the last buildMessage,
 *  through buildCloveSet, to here.
 */
private static byte[] buildClove(RouterContext ctx, GarlicConfig config) throws DataFormatException, IOException {
    GarlicClove clove = new GarlicClove(ctx);
    GarlicMessage msg = buildMessage(ctx, config);
    if (msg == null)
        throw new DataFormatException("Unable to build message from clove config");
    clove.setData(msg);
    return buildCommonClove(clove, config);
}

Example 3 with GarlicMessage

use of net.i2p.data.i2np.GarlicMessage in project i2p.i2p by i2p.

the class GarlicMessageBuilder method buildMessage.

/**
 *  used by TestJob and directly above
 *  and for encrypting DatabaseLookupMessages
 *
 * @param ctx scope
 * @param config how/what to wrap
 * @param wrappedKey unused - why??
 * @param wrappedTags New tags to be sent along with the message.
 *                    200 max enforced at receiver; null OK
 * @param target public key of the location being garlic routed to (may be null if we
 *               know the encryptKey and encryptTag)
 * @param encryptKey sessionKey used to encrypt the current message, non-null
 * @param encryptTag sessionTag used to encrypt the current message, null to force ElG
 * @throws IllegalArgumentException on error
 */
public static GarlicMessage buildMessage(RouterContext ctx, GarlicConfig config, SessionKey wrappedKey, Set<SessionTag> wrappedTags, PublicKey target, SessionKey encryptKey, SessionTag encryptTag) {
    Log log = ctx.logManager().getLog(GarlicMessageBuilder.class);
    if (config == null)
        throw new IllegalArgumentException("Null config specified");
    GarlicMessage msg = new GarlicMessage(ctx);
    // noteWrap(ctx, msg, config);
    byte[] cloveSet = buildCloveSet(ctx, config);
    // TODO - 128 is the minimum padded size - should it be more? less? random?
    byte[] encData = ctx.elGamalAESEngine().encrypt(cloveSet, target, encryptKey, wrappedTags, encryptTag, 128);
    msg.setData(encData);
    msg.setMessageExpiration(config.getExpiration());
    long timeFromNow = config.getExpiration() - ctx.clock().now();
    if (timeFromNow < 1 * 1000) {
        if (log.shouldLog(Log.DEBUG))
            log.debug("Building a message expiring in " + timeFromNow + "ms: " + config, new Exception("created by"));
        return null;
    }
    if (log.shouldLog(Log.DEBUG))
        log.debug("CloveSet (" + config.getCloveCount() + " cloves) for message " + msg.getUniqueId() + " is " + cloveSet.length + " bytes and encrypted message data is " + encData.length + " bytes");
    return msg;
}

Example 4 with GarlicMessage

use of net.i2p.data.i2np.GarlicMessage in project i2p.i2p by i2p.

the class OutboundClientMessageJobHelper method buildAckClove.

/**
 *  Build a clove that sends a DeliveryStatusMessage to us.
 *  As of 0.9.12, the DSM is wrapped in a GarlicMessage.
 *  @param skm encrypt dsm with this skm non-null
 *  @return null on error
 */
private static PayloadGarlicConfig buildAckClove(RouterContext ctx, Hash from, TunnelInfo replyToTunnel, long replyToken, long expiration, SessionKeyManager skm) {
    Log log = ctx.logManager().getLog(OutboundClientMessageJobHelper.class);
    if (replyToTunnel == null) {
        if (log.shouldLog(Log.WARN))
            log.warn("Unable to send client message from " + from.toBase64() + ", as there are no inbound tunnels available");
        return null;
    }
    // tunnel id on that gateway
    TunnelId replyToTunnelId = replyToTunnel.getReceiveTunnelId(0);
    // inbound tunnel gateway
    Hash replyToTunnelRouter = replyToTunnel.getPeer(0);
    if (log.shouldLog(Log.DEBUG))
        log.debug("Ack for the data message will come back along tunnel " + replyToTunnelId + ": " + replyToTunnel);
    DeliveryInstructions ackInstructions = new DeliveryInstructions();
    ackInstructions.setDeliveryMode(DeliveryInstructions.DELIVERY_MODE_TUNNEL);
    ackInstructions.setRouter(replyToTunnelRouter);
    ackInstructions.setTunnelId(replyToTunnelId);
    // defaults
    // ackInstructions.setDelayRequested(false);
    // ackInstructions.setDelaySeconds(0);
    // ackInstructions.setEncrypted(false);
    PayloadGarlicConfig ackClove = new PayloadGarlicConfig();
    ackClove.setCertificate(Certificate.NULL_CERT);
    ackClove.setDeliveryInstructions(ackInstructions);
    ackClove.setExpiration(expiration);
    ackClove.setId(ctx.random().nextLong(I2NPMessage.MAX_ID_VALUE));
    DeliveryStatusMessage dsm = buildDSM(ctx, replyToken);
    GarlicMessage msg = wrapDSM(ctx, skm, dsm);
    if (msg == null) {
        if (log.shouldLog(Log.WARN))
            log.warn("Failed to wrap ack clove");
        return null;
    }
    ackClove.setPayload(msg);
    return ackClove;
}

Example 5 with GarlicMessage

use of net.i2p.data.i2np.GarlicMessage in project i2p.i2p by i2p.

the class OutboundClientMessageJobHelper method createGarlicMessage.

/**
 * Build a garlic message that will be delivered to the router on which the target is located.
 * Inside the message are two cloves: one containing the payload with instructions for
 * delivery to the (now local) destination, and the other containing a DeliveryStatusMessage with
 * instructions for delivery to an inbound tunnel of this router.
 *
 * How the DeliveryStatusMessage is wrapped can vary - it can be simply sent to a tunnel (as above),
 * wrapped in a GarlicMessage and source routed a few hops before being tunneled, source routed the
 * entire way back, or not wrapped at all - in which case the payload clove contains a SourceRouteBlock
 * and a request for a reply.
 *
 * For now, its just a tunneled DeliveryStatusMessage
 *
 * Unused?
 *
 * @param wrappedKey output parameter that will be filled with the sessionKey used
 * @param wrappedTags output parameter that will be filled with the sessionTags used
 * @param bundledReplyLeaseSet if specified, the given LeaseSet will be packaged with the message (allowing
 *                             much faster replies, since their netDb search will return almost instantly)
 * @param replyTunnel non-null if requireAck is true or bundledReplyLeaseSet is non-null
 * @param requireAck if true, bundle replyToken in an ack clove
 * @return garlic, or null if no tunnels were found (or other errors)
 */
/**
 **
 *    static GarlicMessage createGarlicMessage(RouterContext ctx, long replyToken, long expiration, PublicKey recipientPK,
 *                                             Payload data, Hash from, Destination dest, TunnelInfo replyTunnel,
 *                                             SessionKey wrappedKey, Set<SessionTag> wrappedTags,
 *                                             boolean requireAck, LeaseSet bundledReplyLeaseSet) {
 *        PayloadGarlicConfig dataClove = buildDataClove(ctx, data, dest, expiration);
 *        return createGarlicMessage(ctx, replyToken, expiration, recipientPK, dataClove, from, dest, replyTunnel,
 *                                   0, 0, wrappedKey, wrappedTags, requireAck, bundledReplyLeaseSet);
 *    }
 ***
 */
/**
 * Allow the app to specify the data clove directly, which enables OutboundClientMessage to resend the
 * same payload (including expiration and unique id) in different garlics (down different tunnels)
 *
 * This is called from OCMOSJ
 *
 * @param tagsToSendOverride if &gt; 0, use this instead of skm's default
 * @param lowTagsOverride if &gt; 0, use this instead of skm's default
 * @param wrappedKey output parameter that will be filled with the sessionKey used
 * @param wrappedTags output parameter that will be filled with the sessionTags used
 * @param replyTunnel non-null if requireAck is true or bundledReplyLeaseSet is non-null
 * @param requireAck if true, bundle replyToken in an ack clove
 * @param bundledReplyLeaseSet may be null; if non-null, put it in a clove
 * @return garlic, or null if no tunnels were found (or other errors)
 */
static GarlicMessage createGarlicMessage(RouterContext ctx, long replyToken, long expiration, PublicKey recipientPK, PayloadGarlicConfig dataClove, Hash from, Destination dest, TunnelInfo replyTunnel, int tagsToSendOverride, int lowTagsOverride, SessionKey wrappedKey, Set<SessionTag> wrappedTags, boolean requireAck, LeaseSet bundledReplyLeaseSet) {
    SessionKeyManager skm = ctx.clientManager().getClientSessionKeyManager(from);
    if (skm == null)
        return null;
    GarlicConfig config = createGarlicConfig(ctx, replyToken, expiration, recipientPK, dataClove, from, dest, replyTunnel, requireAck, bundledReplyLeaseSet, skm);
    if (config == null)
        return null;
    // no use sending tags unless we have a reply token set up already
    int tagsToSend = replyToken >= 0 ? (tagsToSendOverride > 0 ? tagsToSendOverride : skm.getTagsToSend()) : 0;
    int lowThreshold = lowTagsOverride > 0 ? lowTagsOverride : skm.getLowThreshold();
    GarlicMessage msg = GarlicMessageBuilder.buildMessage(ctx, config, wrappedKey, wrappedTags, tagsToSend, lowThreshold, skm);
    return msg;
}