コード例 #1
0
ファイル: Decoder.java プロジェクト: hsdrose/TomP2P
  private void verifySignature(
      final ByteBuf buf, final int readerBefore, final int len, final boolean donePayload)
      throws SignatureException, InvalidKeyException {

    if (!message.isSign()) {
      return;
    }
    // if we read the complete data, we also read the signature
    // for the verification, we should not use this for the signature
    final int length = donePayload ? len - signatureFactory.signatureSize() : len;
    ByteBuffer[] byteBuffers = buf.nioBuffers(readerBefore, length);
    if (signature == null) {
      signature = signatureFactory.update(message.publicKey(0), byteBuffers);
    } else {
      for (int i = 0; i < byteBuffers.length; i++) {
        signature.update(byteBuffers[i]);
      }
    }

    if (donePayload) {
      byte[] signatureReceived = message.receivedSignature().encode();
      LOG.debug("Verifying received signature: {}", Arrays.toString(signatureReceived));
      if (signature.verify(signatureReceived)) {
        // set public key only if signature is correct
        message.setVerified();
        LOG.debug("Signature check OK.");
      } else {
        LOG.warn("Signature check NOT OK. Message: {}.", message);
      }
    }
  }
コード例 #2
0
ファイル: Decoder.java プロジェクト: hsdrose/TomP2P
  public boolean decodePayload(final ByteBuf buf)
      throws NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException {
    LOG.debug(
        "About to pass message {} to {}. Buffer to read: {}.",
        message,
        message.senderSocket(),
        buf.readableBytes());
    if (!message.hasContent()) {
      return true;
    }

    // payload comes here
    int size;
    PublicKey receivedPublicKey;
    while (contentTypes.size() > 0) {
      Content content = contentTypes.peek();
      LOG.debug("Parse content: {} in message {}", content, message);
      switch (content) {
        case INTEGER:
          if (buf.readableBytes() < Utils.INTEGER_BYTE_SIZE) {
            return false;
          }
          message.intValue(buf.readInt());
          lastContent = contentTypes.poll();
          break;
        case LONG:
          if (buf.readableBytes() < Utils.LONG_BYTE_SIZE) {
            return false;
          }
          message.longValue(buf.readLong());
          lastContent = contentTypes.poll();
          break;
        case KEY:
          if (buf.readableBytes() < Number160.BYTE_ARRAY_SIZE) {
            return false;
          }
          byte[] me = new byte[Number160.BYTE_ARRAY_SIZE];
          buf.readBytes(me);
          message.key(new Number160(me));
          lastContent = contentTypes.poll();
          break;
        case BLOOM_FILTER:
          if (buf.readableBytes() < Utils.SHORT_BYTE_SIZE) {
            return false;
          }
          size = buf.getUnsignedShort(buf.readerIndex());
          if (buf.readableBytes() < size) {
            return false;
          }
          message.bloomFilter(new SimpleBloomFilter<Number160>(buf));
          lastContent = contentTypes.poll();
          break;
        case SET_NEIGHBORS:
          if (neighborSize == -1 && buf.readableBytes() < Utils.BYTE_BYTE_SIZE) {
            return false;
          }
          if (neighborSize == -1) {
            neighborSize = buf.readUnsignedByte();
          }
          if (neighborSet == null) {
            neighborSet = new NeighborSet(-1, new ArrayList<PeerAddress>(neighborSize));
          }
          for (int i = neighborSet.size(); i < neighborSize; i++) {
            if (buf.readableBytes() < Utils.SHORT_BYTE_SIZE) {
              return false;
            }
            int header = buf.getUnsignedShort(buf.readerIndex());
            size = PeerAddress.size(header);
            if (buf.readableBytes() < size) {
              return false;
            }
            PeerAddress pa = new PeerAddress(buf);
            neighborSet.add(pa);
          }
          message.neighborsSet(neighborSet);
          lastContent = contentTypes.poll();
          neighborSize = -1;
          neighborSet = null;
          break;
        case SET_PEER_SOCKET:
          if (peerSocketAddressSize == -1 && buf.readableBytes() < Utils.BYTE_BYTE_SIZE) {
            return false;
          }
          if (peerSocketAddressSize == -1) {
            peerSocketAddressSize = buf.readUnsignedByte();
          }
          if (peerSocketAddresses == null) {
            peerSocketAddresses = new ArrayList<PeerSocketAddress>(peerSocketAddressSize);
          }
          for (int i = peerSocketAddresses.size(); i < peerSocketAddressSize; i++) {
            if (buf.readableBytes() < Utils.BYTE_BYTE_SIZE) {
              return false;
            }
            int header = buf.getUnsignedByte(buf.readerIndex());
            boolean isIPv4 = header == 0;
            size = PeerSocketAddress.size(isIPv4);
            if (buf.readableBytes() < size + Utils.BYTE_BYTE_SIZE) {
              return false;
            }
            // skip the ipv4/ipv6 header
            buf.skipBytes(1);
            peerSocketAddresses.add(PeerSocketAddress.create(buf, isIPv4));
          }
          message.peerSocketAddresses(peerSocketAddresses);
          lastContent = contentTypes.poll();
          peerSocketAddressSize = -1;
          peerSocketAddresses = null;
          break;
        case SET_KEY640:
          if (keyCollectionSize == -1 && buf.readableBytes() < Utils.INTEGER_BYTE_SIZE) {
            return false;
          }
          if (keyCollectionSize == -1) {
            keyCollectionSize = buf.readInt();
          }
          if (keyCollection == null) {
            keyCollection = new KeyCollection(new ArrayList<Number640>(keyCollectionSize));
          }
          for (int i = keyCollection.size(); i < keyCollectionSize; i++) {
            if (buf.readableBytes()
                < Number160.BYTE_ARRAY_SIZE
                    + Number160.BYTE_ARRAY_SIZE
                    + Number160.BYTE_ARRAY_SIZE
                    + Number160.BYTE_ARRAY_SIZE) {
              return false;
            }
            byte[] me2 = new byte[Number160.BYTE_ARRAY_SIZE];
            buf.readBytes(me2);
            Number160 locationKey = new Number160(me2);
            buf.readBytes(me2);
            Number160 domainKey = new Number160(me2);
            buf.readBytes(me2);
            Number160 contentKey = new Number160(me2);
            buf.readBytes(me2);
            Number160 versionKey = new Number160(me2);
            keyCollection.add(new Number640(locationKey, domainKey, contentKey, versionKey));
          }
          message.keyCollection(keyCollection);
          lastContent = contentTypes.poll();
          keyCollectionSize = -1;
          keyCollection = null;
          break;
        case MAP_KEY640_DATA:
          if (mapSize == -1 && buf.readableBytes() < Utils.INTEGER_BYTE_SIZE) {
            return false;
          }
          if (mapSize == -1) {
            mapSize = buf.readInt();
          }
          if (dataMap == null) {
            dataMap = new DataMap(new TreeMap<Number640, Data>());
          }
          if (data != null) {
            if (!data.decodeBuffer(buf)) {
              return false;
            }
            if (!data.decodeDone(buf, message.publicKey(0), signatureFactory)) {
              return false;
            }
            data = null;
            key = null;
          }
          for (int i = dataMap.size(); i < mapSize; i++) {
            if (key == null) {
              if (buf.readableBytes()
                  < Number160.BYTE_ARRAY_SIZE
                      + Number160.BYTE_ARRAY_SIZE
                      + Number160.BYTE_ARRAY_SIZE
                      + Number160.BYTE_ARRAY_SIZE) {
                return false;
              }
              byte[] me3 = new byte[Number160.BYTE_ARRAY_SIZE];
              buf.readBytes(me3);
              Number160 locationKey = new Number160(me3);
              buf.readBytes(me3);
              Number160 domainKey = new Number160(me3);
              buf.readBytes(me3);
              Number160 contentKey = new Number160(me3);
              buf.readBytes(me3);
              Number160 versionKey = new Number160(me3);
              key = new Number640(locationKey, domainKey, contentKey, versionKey);
            }
            LOG.debug("Key decoded in message {}, remaining {}", message, buf.readableBytes());
            data = Data.decodeHeader(buf, signatureFactory);
            if (data == null) {
              return false;
            }
            LOG.debug("Header decoded in message {}, remaining {}", message, buf.readableBytes());
            dataMap.dataMap().put(key, data);

            if (!data.decodeBuffer(buf)) {
              return false;
            }
            LOG.debug("Buffer decoded in message {}", message);
            if (!data.decodeDone(buf, message.publicKey(0), signatureFactory)) {
              return false;
            }
            LOG.debug("Done decoded in message {}", message);
            // if we have signed the message, set the public key anyway, but only if we indicated so
            inheritPublicKey(message, data);
            data = null;
            key = null;
          }

          message.setDataMap(dataMap);
          lastContent = contentTypes.poll();
          mapSize = -1;
          dataMap = null;
          break;
        case MAP_KEY640_KEYS:
          if (keyMap640KeysSize == -1 && buf.readableBytes() < Utils.INTEGER_BYTE_SIZE) {
            return false;
          }
          if (keyMap640KeysSize == -1) {
            keyMap640KeysSize = buf.readInt();
          }
          if (keyMap640Keys == null) {
            keyMap640Keys = new KeyMap640Keys(new TreeMap<Number640, Collection<Number160>>());
          }

          final int meta =
              Number160.BYTE_ARRAY_SIZE
                  + Number160.BYTE_ARRAY_SIZE
                  + Number160.BYTE_ARRAY_SIZE
                  + Number160.BYTE_ARRAY_SIZE;

          for (int i = keyMap640Keys.size(); i < keyMap640KeysSize; i++) {
            if (buf.readableBytes() < meta + Utils.BYTE_BYTE_SIZE) {
              return false;
            }
            size = buf.getUnsignedByte(buf.readerIndex() + meta);

            if (buf.readableBytes()
                < meta + Utils.BYTE_BYTE_SIZE + (size * Number160.BYTE_ARRAY_SIZE)) {
              return false;
            }
            byte[] me3 = new byte[Number160.BYTE_ARRAY_SIZE];
            buf.readBytes(me3);
            Number160 locationKey = new Number160(me3);
            buf.readBytes(me3);
            Number160 domainKey = new Number160(me3);
            buf.readBytes(me3);
            Number160 contentKey = new Number160(me3);
            buf.readBytes(me3);
            Number160 versionKey = new Number160(me3);

            int numBasedOn = buf.readByte();
            Set<Number160> value = new HashSet<Number160>(numBasedOn);
            for (int j = 0; j < numBasedOn; j++) {
              buf.readBytes(me3);
              Number160 basedOnKey = new Number160(me3);
              value.add(basedOnKey);
            }

            keyMap640Keys.put(new Number640(locationKey, domainKey, contentKey, versionKey), value);
          }

          message.keyMap640Keys(keyMap640Keys);
          lastContent = contentTypes.poll();
          keyMap640KeysSize = -1;
          keyMap640Keys = null;
          break;
        case MAP_KEY640_BYTE:
          if (keyMapByteSize == -1 && buf.readableBytes() < Utils.INTEGER_BYTE_SIZE) {
            return false;
          }
          if (keyMapByteSize == -1) {
            keyMapByteSize = buf.readInt();
          }
          if (keyMapByte == null) {
            keyMapByte = new KeyMapByte(new HashMap<Number640, Byte>(2 * keyMapByteSize));
          }

          for (int i = keyMapByte.size(); i < keyMapByteSize; i++) {
            if (buf.readableBytes()
                < Number160.BYTE_ARRAY_SIZE
                    + Number160.BYTE_ARRAY_SIZE
                    + Number160.BYTE_ARRAY_SIZE
                    + Number160.BYTE_ARRAY_SIZE
                    + 1) {
              return false;
            }
            byte[] me3 = new byte[Number160.BYTE_ARRAY_SIZE];
            buf.readBytes(me3);
            Number160 locationKey = new Number160(me3);
            buf.readBytes(me3);
            Number160 domainKey = new Number160(me3);
            buf.readBytes(me3);
            Number160 contentKey = new Number160(me3);
            buf.readBytes(me3);
            Number160 versionKey = new Number160(me3);
            byte value = buf.readByte();
            keyMapByte.put(new Number640(locationKey, domainKey, contentKey, versionKey), value);
          }

          message.keyMapByte(keyMapByte);
          lastContent = contentTypes.poll();
          keyMapByteSize = -1;
          keyMapByte = null;
          break;
        case BYTE_BUFFER:
          if (bufferSize == -1 && buf.readableBytes() < Utils.INTEGER_BYTE_SIZE) {
            return false;
          }
          if (bufferSize == -1) {
            bufferSize = buf.readInt();
          }
          if (buffer == null) {
            buffer = new DataBuffer();
          }

          final int remaining = bufferSize - bufferTransferred;
          bufferTransferred += buffer.transferFrom(buf, remaining);

          if (bufferTransferred < bufferSize) {
            LOG.debug(
                "Still looking for data. Indicating that its not finished yet. Already Transferred = {}, Size = {}.",
                bufferTransferred,
                bufferSize);
            return false;
          }

          message.buffer(new Buffer(buffer.toByteBuf(), bufferSize));
          lastContent = contentTypes.poll();
          bufferSize = -1;
          bufferTransferred = 0;
          buffer = null;
          break;
        case SET_TRACKER_DATA:
          if (trackerDataSize == -1 && buf.readableBytes() < Utils.BYTE_BYTE_SIZE) {
            return false;
          }
          if (trackerDataSize == -1) {
            trackerDataSize = buf.readUnsignedByte();
          }
          if (trackerData == null) {
            trackerData = new TrackerData(new HashMap<PeerAddress, Data>(2 * trackerDataSize));
          }
          if (currentTrackerData != null) {
            if (!currentTrackerData.decodeBuffer(buf)) {
              return false;
            }
            if (!currentTrackerData.decodeDone(buf, message.publicKey(0), signatureFactory)) {
              return false;
            }
            currentTrackerData = null;
          }
          for (int i = trackerData.size(); i < trackerDataSize; i++) {

            if (buf.readableBytes() < Utils.SHORT_BYTE_SIZE) {
              return false;
            }

            int header = buf.getUnsignedShort(buf.readerIndex());

            size = PeerAddress.size(header);

            if (buf.readableBytes() < size) {
              return false;
            }
            PeerAddress pa = new PeerAddress(buf);

            currentTrackerData = Data.decodeHeader(buf, signatureFactory);
            if (currentTrackerData == null) {
              return false;
            }
            trackerData.peerAddresses().put(pa, currentTrackerData);
            if (message.isSign()) {
              currentTrackerData.publicKey(message.publicKey(0));
            }

            if (!currentTrackerData.decodeBuffer(buf)) {
              return false;
            }
            if (!currentTrackerData.decodeDone(buf, message.publicKey(0), signatureFactory)) {
              return false;
            }
            currentTrackerData = null;
          }

          message.trackerData(trackerData);
          lastContent = contentTypes.poll();
          trackerDataSize = -1;
          trackerData = null;
          break;
        case PUBLIC_KEY: // fall-through
        case PUBLIC_KEY_SIGNATURE:
          receivedPublicKey = signatureFactory.decodePublicKey(buf);
          if (content == Content.PUBLIC_KEY_SIGNATURE) {
            if (receivedPublicKey == PeerBuilder.EMPTY_PUBLIC_KEY) {
              throw new InvalidKeyException("The public key cannot be empty.");
            }
          }
          if (receivedPublicKey == null) {
            return false;
          }

          message.publicKey(receivedPublicKey);
          lastContent = contentTypes.poll();
          break;
        default:
          break;
      }
    }
    LOG.debug("Parsed content in message {}", message);
    if (message.isSign()) {
      size = signatureFactory.signatureSize();
      if (buf.readableBytes() < size) {
        return false;
      }

      SignatureCodec signatureEncode = signatureFactory.signatureCodec(buf);
      message.receivedSignature(signatureEncode);
    }
    return true;
  }