163 lines
7.0 KiB
Java
163 lines
7.0 KiB
Java
/*
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* Copyright 2015 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.bitmessage.factory;
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import ch.dissem.bitmessage.entity.BitmessageAddress;
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import ch.dissem.bitmessage.entity.NetworkMessage;
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import ch.dissem.bitmessage.entity.ObjectMessage;
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import ch.dissem.bitmessage.entity.payload.*;
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import ch.dissem.bitmessage.entity.valueobject.PrivateKey;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.SocketTimeoutException;
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/**
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* Creates {@link NetworkMessage} objects from {@link InputStream InputStreams}
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*/
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public class Factory {
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public static final Logger LOG = LoggerFactory.getLogger(Factory.class);
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public static NetworkMessage getNetworkMessage(int version, InputStream stream) throws SocketTimeoutException {
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try {
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return V3MessageFactory.read(stream);
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} catch (SocketTimeoutException e) {
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throw e;
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} catch (Exception e) {
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LOG.error(e.getMessage(), e);
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return null;
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}
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}
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public static ObjectMessage getObjectMessage(int version, InputStream stream, int length) {
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try {
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return V3MessageFactory.readObject(stream, length);
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} catch (IOException e) {
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LOG.error(e.getMessage(), e);
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return null;
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}
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}
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public static Pubkey createPubkey(long version, long stream, byte[] publicSigningKey, byte[] publicEncryptionKey,
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long nonceTrialsPerByte, long extraBytes, Pubkey.Feature... features) {
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if (publicSigningKey.length != 64 && publicSigningKey.length != 65)
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throw new IllegalArgumentException("64 bytes signing key expected, but it was "
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+ publicSigningKey.length + " bytes long.");
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if (publicEncryptionKey.length != 64 && publicEncryptionKey.length != 65)
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throw new IllegalArgumentException("64 bytes encryption key expected, but it was "
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+ publicEncryptionKey.length + " bytes long.");
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switch ((int) version) {
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case 2:
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return new V2Pubkey.Builder()
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.stream(stream)
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.publicSigningKey(publicSigningKey)
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.publicEncryptionKey(publicEncryptionKey)
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.behaviorBitfield(Pubkey.Feature.bitfield(features))
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.build();
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case 3:
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return new V3Pubkey.Builder()
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.stream(stream)
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.publicSigningKey(publicSigningKey)
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.publicEncryptionKey(publicEncryptionKey)
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.behaviorBitfield(Pubkey.Feature.bitfield(features))
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.nonceTrialsPerByte(nonceTrialsPerByte)
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.extraBytes(extraBytes)
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.build();
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case 4:
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return new V4Pubkey(
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null, // FIXME: calculate tag
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new V3Pubkey.Builder()
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.stream(stream)
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.publicSigningKey(publicSigningKey)
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.publicEncryptionKey(publicEncryptionKey)
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.behaviorBitfield(Pubkey.Feature.bitfield(features))
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.nonceTrialsPerByte(nonceTrialsPerByte)
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.extraBytes(extraBytes)
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.build()
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);
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default:
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throw new IllegalArgumentException("Unexpected pubkey version " + version);
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}
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}
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public static BitmessageAddress generatePrivateAddress(long stream, Pubkey.Feature... features) {
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return new BitmessageAddress(new PrivateKey(stream, 1000, 1000, features));
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}
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static ObjectPayload getObjectPayload(long objectType, long version, long streamNumber, InputStream stream, int length) throws IOException {
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ObjectType type = ObjectType.fromNumber(objectType);
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if (type != null) {
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switch (type) {
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case GET_PUBKEY:
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return parseGetPubkey(version, streamNumber, stream, length);
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case PUBKEY:
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return parsePubkey(version, streamNumber, stream, length);
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case MSG:
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return parseMsg(version, streamNumber, stream, length);
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case BROADCAST:
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return parseBroadcast(version, streamNumber, stream, length);
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default:
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LOG.error("This should not happen, someone broke something in the code!");
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}
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}
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// fallback: just store the message - we don't really care what it is
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// LOG.info("Unexpected object type: " + objectType);
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return GenericPayload.read(stream, streamNumber, length);
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}
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private static ObjectPayload parseGetPubkey(long version, long streamNumber, InputStream stream, int length) throws IOException {
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return GetPubkey.read(stream, streamNumber, length, version);
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}
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public static Pubkey readPubkey(long version, long stream, InputStream is, int length) throws IOException {
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switch ((int) version) {
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case 2:
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return V2Pubkey.read(is, stream);
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case 3:
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return V3Pubkey.read(is, stream);
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case 4:
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return V4Pubkey.read(is, stream, length);
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}
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LOG.debug("Unexpected pubkey version " + version + ", handling as generic payload object");
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return null;
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}
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private static ObjectPayload parsePubkey(long version, long streamNumber, InputStream stream, int length) throws IOException {
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Pubkey pubkey = readPubkey(version, streamNumber, stream, length);
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return pubkey != null ? pubkey : GenericPayload.read(stream, streamNumber, length);
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}
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private static ObjectPayload parseMsg(long version, long streamNumber, InputStream stream, int length) throws IOException {
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return Msg.read(stream, streamNumber, length);
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}
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private static ObjectPayload parseBroadcast(long version, long streamNumber, InputStream stream, int length) throws IOException {
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switch ((int) version) {
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case 4:
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return V4Broadcast.read(stream, streamNumber, length);
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case 5:
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return V5Broadcast.read(stream, streamNumber, length);
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default:
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LOG.debug("Encountered unknown broadcast version " + version);
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return GenericPayload.read(stream, streamNumber, length);
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}
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}
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}
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