Package org.java_websocket

Class SSLSocketChannel

java.lang.Object

org.java_websocket.SSLSocketChannel

All Implemented Interfaces:

Closeable, AutoCloseable, ByteChannel, Channel, ReadableByteChannel, WritableByteChannel, ISSLChannel, WrappedByteChannel

public class SSLSocketChannel
extends Object
implements WrappedByteChannel, ByteChannel, ISSLChannel

A class that represents an SSL/TLS peer, and can be extended to create a client or a server.

It makes use of the JSSE framework, and specifically the SSLEngine logic, which is described by Oracle as "an advanced API, not appropriate for casual use", since it requires the user to implement much of the communication establishment procedure himself. More information about it can be found here: http://docs.oracle.com/javase/8/docs/technotes/guides/security/jsse/JSSERefGuide.html#SSLEngine

SSLSocketChannel implements the handshake protocol, required to establish a connection between two peers, which is common for both client and server and provides the abstract read(ByteBuffer) and write(ByteBuffer) (String)} methods, that need to be implemented by the specific SSL/TLS peer that is going to extend this class.

Author:

Alex Karnezis

Modified by marci4 to allow the usage as a ByteChannel

Permission for usage received at May 25, 2017 by Alex Karnezis

Constructor Summary

Constructors

Constructor	Description
SSLSocketChannel(SocketChannel inputSocketChannel, SSLEngine inputEngine, ExecutorService inputExecutor, SelectionKey key)

Method Summary

Modifier and Type	Method	Description
void	close()
SSLEngine	getSSLEngine()	Get the ssl engine used for the de- and encryption of the communication.
boolean	isBlocking()	This function returns the blocking state of the channel
boolean	isNeedRead()	returns whether readMore should be called to fetch data which has been decoded but not yet been returned.
boolean	isNeedWrite()	returns whether writeMore should be called write additional data.
boolean	isOpen()
int	read(ByteBuffer dst)
int	readMore(ByteBuffer dst)	This function does not read data from the underlying channel at all.
int	write(ByteBuffer output)
void	writeMore()	Gets called when WrappedByteChannel.isNeedWrite() ()} requires a additional rite

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SSLSocketChannel

public SSLSocketChannel(SocketChannel inputSocketChannel,
 SSLEngine inputEngine,
 ExecutorService inputExecutor,
 SelectionKey key)
                 throws IOException

Throws:

IOException

Method Details

read

public int read(ByteBuffer dst)
         throws IOException

Specified by:

read in interface ReadableByteChannel

Throws:

IOException

write

public int write(ByteBuffer output)
          throws IOException

Specified by:

write in interface WritableByteChannel

Throws:

IOException

isNeedWrite

public boolean isNeedWrite()

Description copied from interface: WrappedByteChannel

returns whether writeMore should be called write additional data.

Specified by:

isNeedWrite in interface WrappedByteChannel

Returns:

is a additional write needed

writeMore

public void writeMore()
               throws IOException

Description copied from interface: WrappedByteChannel

Gets called when WrappedByteChannel.isNeedWrite() ()} requires a additional rite

Specified by:

writeMore in interface WrappedByteChannel

Throws:

IOException - may be thrown due to an error while writing

isNeedRead

public boolean isNeedRead()

Description copied from interface: WrappedByteChannel

returns whether readMore should be called to fetch data which has been decoded but not yet been returned.

Specified by:

isNeedRead in interface WrappedByteChannel

Returns:

is a additional read needed

See Also:

• ReadableByteChannel.read(ByteBuffer)
• WrappedByteChannel.readMore(ByteBuffer)

readMore

public int readMore(ByteBuffer dst)
             throws IOException

Description copied from interface: WrappedByteChannel

This function does not read data from the underlying channel at all. It is just a way to fetch data which has already be received or decoded but was but was not yet returned to the user. This could be the case when the decoded data did not fit into the buffer the user passed to ReadableByteChannel.read(ByteBuffer).

Specified by:

readMore in interface WrappedByteChannel

Parameters:

dst - the destiny of the read

Returns:

the amount of remaining data

Throws:

IOException - when a error occurred during unwrapping

isBlocking

public boolean isBlocking()

Description copied from interface: WrappedByteChannel

This function returns the blocking state of the channel

Specified by:

isBlocking in interface WrappedByteChannel

Returns:

is the channel blocking

isOpen

public boolean isOpen()

Specified by:

isOpen in interface Channel

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Channel

Specified by:

close in interface Closeable

Throws:

IOException

getSSLEngine

public SSLEngine getSSLEngine()

Description copied from interface: ISSLChannel

Get the ssl engine used for the de- and encryption of the communication.

Specified by:

getSSLEngine in interface ISSLChannel

Returns:

the ssl engine of this channel