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Java Socket library supporting SOCKS and HTTP proxy servers with authentication
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/**
* Copyright 2021 Socket Broker Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.exceptionfactory.socketbroker.protocol.socks;
import com.exceptionfactory.socketbroker.protocol.PacketEncoder;
import com.exceptionfactory.socketbroker.protocol.socks.field.SocksAuthenticationMethod;
import com.exceptionfactory.socketbroker.protocol.socks.field.SocksVersion;
import java.io.ByteArrayOutputStream;
import java.util.List;
/**
* Packet Encoder for SOCKS 5 Client Greeting
*/
class SocksClientGreetingEncoder implements PacketEncoder {
/**
* Get Encoded SOCKS 5 Client Greeting with version and authentication methods
*
* @param clientGreeting SOCKS Client Greeting
* @return Encoded Client Greeting
*/
@Override
public byte[] getEncoded(final SocksClientGreeting clientGreeting) {
final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
outputStream.write(SocksVersion.VERSION_5.getCode());
final List authenticationMethods = clientGreeting.getAuthenticationMethods();
outputStream.write(authenticationMethods.size());
authenticationMethods.stream().map(SocksAuthenticationMethod::getCode).forEach(outputStream::write);
return outputStream.toByteArray();
}
}
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