/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file 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 "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 javax.net.ssl;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
/**
* The extension of {@code Socket} providing secure protocols like SSL (Secure
* Socket Layer") or TLS (Transport Layer Security).
*/
public abstract class SSLSocket extends Socket {
/**
* Only to be used by subclasses.
* <p>
* Creates a TCP socket.
*/
protected SSLSocket() {
}
/**
* Only to be used by subclasses.
* <p>
* Creates a TCP socket connection to the specified host at the specified
* port.
*
* @param host
* the host name to connect to.
* @param port
* the port number to connect to.
* @throws IOException
* if creating the socket fails.
* @throws UnknownHostException
* if the specified host is not known.
*/
protected SSLSocket(String host, int port) throws IOException, UnknownHostException {
super(host, port);
}
/**
* Only to be used by subclasses.
* <p>
* Creates a TCP socket connection to the specified address at the specified
* port.
*
* @param address
* the address to connect to.
* @param port
* the port number to connect to.
* @throws IOException
* if creating the socket fails.
*/
protected SSLSocket(InetAddress address, int port) throws IOException {
super(address, port);
}
/**
* Only to be used by subclasses.
* <p>
* Creates a TCP socket connection to the specified host at the specified
* port with the client side bound to the specified address and port.
*
* @param host
* the host name to connect to.
* @param port
* the port number to connect to.
* @param clientAddress
* the client address to bind to
* @param clientPort
* the client port number to bind to.
* @throws IOException
* if creating the socket fails.
* @throws UnknownHostException
* if the specified host is not known.
*/
protected SSLSocket(String host, int port, InetAddress clientAddress, int clientPort)
throws IOException, UnknownHostException {
super(host, port, clientAddress, clientPort);
}
/**
* Only to be used by subclasses.
* <p>
* Creates a TCP socket connection to the specified address at the specified
* port with the client side bound to the specified address and port.
*
* @param address
* the address to connect to.
* @param port
* the port number to connect to.
* @param clientAddress
* the client address to bind to.
* @param clientPort
* the client port number to bind to.
* @throws IOException
* if creating the socket fails.
*/
protected SSLSocket(InetAddress address, int port, InetAddress clientAddress, int clientPort)
throws IOException {
super(address, port, clientAddress, clientPort);
}
/**
* Unsupported for SSL because reading from an SSL socket may require
* writing to the network.
*/
@Override public void shutdownInput() throws IOException {
throw new UnsupportedOperationException();
}
/**
* Unsupported for SSL because writing to an SSL socket may require reading
* from the network.
*/
@Override public void shutdownOutput() throws IOException {
throw new UnsupportedOperationException();
}
/**
* Returns the names of the supported cipher suites.
*/
public abstract String[] getSupportedCipherSuites();
/**
* Returns the names of the enabled cipher suites.
*/
public abstract String[] getEnabledCipherSuites();
/**
* Sets the names of the cipher suites to be enabled.
* Only cipher suites returned by {@link #getSupportedCipherSuites()} are
* allowed.
*
* @param suites
* the names of the to be enabled cipher suites.
* @throws IllegalArgumentException
* if one of the cipher suite names is not supported.
*/
public abstract void setEnabledCipherSuites(String[] suites);
/**
* Returns the names of the supported protocols.
*/
public abstract String[] getSupportedProtocols();
/**
* Returns the names of the enabled protocols.
*/
public abstract String[] getEnabledProtocols();
/**
* Sets the names of the protocols to be enabled. Only
* protocols returned by {@link #getSupportedProtocols()} are allowed.
*
* @param protocols
* the names of the to be enabled protocols.
* @throws IllegalArgumentException
* if one of the protocols is not supported.
*/
public abstract void setEnabledProtocols(String[] protocols);
/**
* Returns the {@code SSLSession} for this connection. If necessary, a
* handshake will be initiated, in which case this method will block until the handshake
* has been established. If the handshake fails, an invalid session object
* will be returned.
*
* @return the session object.
*/
public abstract SSLSession getSession();
/**
* Registers the specified listener to receive notification on completion of a
* handshake on this connection.
*
* @param listener
* the listener to register.
* @throws IllegalArgumentException
* if {@code listener} is {@code null}.
*/
public abstract void addHandshakeCompletedListener(HandshakeCompletedListener listener);
/**
* Removes the specified handshake completion listener.
*
* @param listener
* the listener to remove.
* @throws IllegalArgumentException
* if the specified listener is not registered or {@code null}.
*/
public abstract void removeHandshakeCompletedListener(HandshakeCompletedListener listener);
/**
* Starts a new SSL handshake on this connection.
*
* @throws IOException
* if an error occurs.
*/
public abstract void startHandshake() throws IOException;
/**
* Sets whether this connection should act in client mode when handshaking.
*
* @param mode
* {@code true} if this connection should act in client mode,
* {@code false} if not.
*/
public abstract void setUseClientMode(boolean mode);
/**
* Returns true if this connection will act in client mode when handshaking.
*/
public abstract boolean getUseClientMode();
/**
* Sets whether the server should require client authentication. This
* does not apply to sockets in {@link #getUseClientMode() client mode}.
* Client authentication is one of the following:
* <ul>
* <li>authentication required</li>
* <li>authentication requested</li>
* <li>no authentication needed</li>
* </ul>
* This method overrides the setting of {@link #setWantClientAuth(boolean)}.
*/
public abstract void setNeedClientAuth(boolean need);
/**
* Sets whether the server should request client authentication. Unlike
* {@link #setNeedClientAuth} this won't stop the negotiation if the client
* doesn't authenticate. This does not apply to sockets in {@link
* #getUseClientMode() client mode}.The client authentication is one of:
* <ul>
* <li>authentication required</li>
* <li>authentication requested</li>
* <li>no authentication needed</li>
* </ul>
* This method overrides the setting of {@link #setNeedClientAuth(boolean)}.
*/
public abstract void setWantClientAuth(boolean want);
/**
* Returns true if the server socket should require client authentication.
* This does not apply to sockets in {@link #getUseClientMode() client
* mode}.
*/
public abstract boolean getNeedClientAuth();
/**
* Returns true if the server should request client authentication. This
* does not apply to sockets in {@link #getUseClientMode() client mode}.
*/
public abstract boolean getWantClientAuth();
/**
* Sets whether new SSL sessions may be created by this socket or if
* existing sessions must be reused. If {@code flag} is false and there are
* no sessions to resume, handshaking will fail.
*
* @param flag {@code true} if new sessions may be created.
*/
public abstract void setEnableSessionCreation(boolean flag);
/**
* Returns whether new SSL sessions may be created by this socket or if
* existing sessions must be reused.
*
* @return {@code true} if new sessions may be created, otherwise
* {@code false}.
*/
public abstract boolean getEnableSessionCreation();
/**
* Returns a new SSLParameters based on this SSLSocket's current
* cipher suites, protocols, and client authentication settings.
*
* @since 1.6
*/
public SSLParameters getSSLParameters() {
SSLParameters p = new SSLParameters();
p.setCipherSuites(getEnabledCipherSuites());
p.setProtocols(getEnabledProtocols());
p.setNeedClientAuth(getNeedClientAuth());
p.setWantClientAuth(getWantClientAuth());
return p;
}
/**
* Sets various SSL handshake parameters based on the SSLParameter
* argument. Specifically, sets the SSLSocket's enabled cipher
* suites if the parameter's cipher suites are non-null. Similarly
* sets the enabled protocols. If the parameters specify the want
* or need for client authentication, those requirements are set
* on the SSLSocket, otherwise both are set to false.
* @since 1.6
*/
public void setSSLParameters(SSLParameters p) {
String[] cipherSuites = p.getCipherSuites();
if (cipherSuites != null) {
setEnabledCipherSuites(cipherSuites);
}
String[] protocols = p.getProtocols();
if (protocols != null) {
setEnabledProtocols(protocols);
}
if (p.getNeedClientAuth()) {
setNeedClientAuth(true);
} else if (p.getWantClientAuth()) {
setWantClientAuth(true);
} else {
setWantClientAuth(false);
}
}
}