Ejemplo n.º 1
0
  protected void handleUpEvent(Message msg, EncryptHeader hdr) {
    // check if we had some sort of encrypt control header if using supplied key we should not
    // process it
    if (suppliedKey) {
      log.warn("we received an encrypt header of %s while in configured mode", hdr.getType());
      return;
    }

    // see what sort of encrypt control message we have received
    switch (hdr.getType()) {
        // if a key request
      case EncryptHeader.KEY_REQUEST:
        log.debug("received a key request from peer %s", msg.getSrc());

        // if a key request send response key back
        try {
          // extract peer's public key
          PublicKey tmpKey = generatePubKey(msg.getBuffer());
          // send back the secret key we have
          sendSecretKey(getSecretKey(), tmpKey, msg.getSrc());
        } catch (Exception e) {
          log.warn("unable to reconstitute peer's public key");
        }
        break;
      case EncryptHeader.SECRETKEY:
        log.debug("received a secretkey response from keyserver %s", msg.getSrc());

        try {
          SecretKey tmp = decodeKey(msg.getBuffer());
          if (tmp == null) sendKeyRequest(); // unable to understand response, let's try again
          else {
            // otherwise lets set the returned key as the shared key
            setKeys(tmp, hdr.getVersion());
            log.debug("decoded secretkey response");
          }
        } catch (Exception e) {
          log.warn("unable to process received public key", e);
        }
        break;
      default:
        log.warn("received ignored encrypt header of %s", hdr.getType());
        break;
    }
  }
Ejemplo n.º 2
0
  private Object handleUpMessage(Event evt) throws Exception {
    Message msg = (Message) evt.getArg();
    EncryptHeader hdr;
    if (msg == null
        || (msg.getLength() == 0 && !encrypt_entire_message)
        || ((hdr = (EncryptHeader) msg.getHeader(this.id)) == null)) return up_prot.up(evt);

    if (log.isTraceEnabled()) log.trace("header received %s", hdr);

    switch (hdr.getType()) {
      case EncryptHeader.ENCRYPT:
        return handleEncryptedMessage(msg, evt, hdr);
      default:
        handleUpEvent(msg, hdr);
        return null;
    }
  }
Ejemplo n.º 3
0
    public Message visit(Message msg, MessageBatch batch) {
      EncryptHeader hdr;

      if (msg == null
          || (msg.getLength() == 0 && !encrypt_entire_message)
          || ((hdr = (EncryptHeader) msg.getHeader(id)) == null)) return null;

      if (hdr.getType() == EncryptHeader.ENCRYPT) {
        // if queueing then pass into queue to be dealt with later
        if (queue_up) {
          queueUpMessage(msg, batch);
          return null;
        }

        // make sure we pass up any queued messages first
        if (!suppliedKey) drainUpQueue();

        if (lock == null) {
          int index = getNextIndex();
          lock = decoding_locks[index];
          cipher = decoding_ciphers[index];
          lock.lock();
        }

        try {
          Message tmpMsg = decryptMessage(cipher, msg.copy()); // need to copy for possible xmits
          if (tmpMsg != null) batch.replace(msg, tmpMsg);
        } catch (Exception e) {
          log.error(
              "failed decrypting message from %s (offset=%d, length=%d, buf.length=%d): %s, headers are %s",
              msg.getSrc(),
              msg.getOffset(),
              msg.getLength(),
              msg.getRawBuffer().length,
              e,
              msg.printHeaders());
        }
      } else {
        batch.remove(
            msg); // a control message will get handled by ENCRYPT and should not be passed up
        handleUpEvent(msg, hdr);
      }
      return null;
    }