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* Licensed to the Apache Software Foundation (ASF) under one *
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* distributed with this work for additional information *
* regarding copyright ownership. The ASF licenses this file *
* to you 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 *
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package org.apache.james.protocols.pop3.core;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.apache.james.protocols.api.CommandHandler;
import org.apache.james.protocols.api.Request;
import org.apache.james.protocols.api.Response;
import org.apache.james.protocols.pop3.POP3Response;
import org.apache.james.protocols.pop3.POP3Session;
/**
* Handler which offer STARTTLS implementation for POP3. STARTTLS is started
* with the STSL command
*
*
*/
public class StlsCmdHandler implements CommandHandler<POP3Session>, CapaCapability {
public final static String COMMAND_NAME = "STLS";
/*
* (non-Javadoc)
* @see org.apache.james.api.protocol.CommandHandler#onCommand(org.apache.james.api.protocol.LogEnabledSession, org.apache.james.api.protocol.Request)
*/
public Response onCommand(POP3Session session, Request request) {
POP3Response response;
// check if starttls is supported, the state is the right one and it was
// not started before
if (session.isStartTLSSupported() && session.getHandlerState() == POP3Session.AUTHENTICATION_READY
&& session.isTLSStarted() == false) {
response = new POP3Response(POP3Response.OK_RESPONSE,"Begin TLS negotiation");
session.writeResponse(response);
try {
session.startTLS();
} catch (IOException e) {
session.getLogger().info("Error while trying to secure connection", e);
// disconnect
response = new POP3Response(POP3Response.ERR_RESPONSE);
response.setEndSession(true);
return response;
}
} else {
response = new POP3Response(POP3Response.ERR_RESPONSE);
return response;
}
return null;
}
/**
* @see org.apache.james.pop3server.core.CapaCapability#getImplementedCapabilities(org.apache.james.protocols.pop3.pop3server.POP3Session)
*/
public List<String> getImplementedCapabilities(POP3Session session) {
List<String> caps = new ArrayList<String>();
if (session.isStartTLSSupported() && session.getHandlerState() == POP3Session.AUTHENTICATION_READY) {
caps.add(COMMAND_NAME);
return caps;
}
return caps;
}
/**
* @see org.apache.james.api.protocol.CommonCommandHandler#getImplCommands()
*/
public Collection<String> getImplCommands() {
List<String> commands = new ArrayList<String>();
commands.add(COMMAND_NAME);
return commands;
}
}