net.sourceforge.jtds.ssl

Class TdsTlsOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

net.sourceforge.jtds.ssl.TdsTlsOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

class TdsTlsOutputStream
extends java.io.FilterOutputStream

An output stream that mediates between JSSE and the DB server.

SQL Server 2000 has the following requirements:

• All handshake records are delivered in TDS packets.
• The "Client Key Exchange" (CKE), "Change Cipher Spec" (CCS) and "Finished" (FIN) messages are to be submitted in the delivered in both the same TDS packet and the same TCP packet.
• From then on TLS/SSL records should be transmitted as normal -- the TDS packet is part of the encrypted application data.

Version:

$Id: TdsTlsOutputStream.java,v 1.4 2005-04-28 14:29:31 alin_sinpalean Exp $

Author:

Rob Worsnop, Mike Hutchinson

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.List	bufferedRecords Used for holding back CKE, CCS and FIN records.
private int	totalSize

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor and Description
TdsTlsOutputStream(java.io.OutputStream out) Constructs a TdsTlsOutputStream based on an underlying output stream.

Method Summary

Modifier and Type	Method and Description
private void	deferRecord(byte[] record, int len) Holds back a record for batched transmission.
void	flush()
private void	flushBufferedRecords() Transmits the buffered batch of records.
(package private) void	putTdsPacket(byte[] b, int len) Write a TDS packet containing the TLS record(s).
void	write(byte[] b, int off, int len)

Methods inherited from class java.io.FilterOutputStream

close, write, write

Methods inherited from class java.lang.Object

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

Field Detail

bufferedRecords

private final java.util.List bufferedRecords

Used for holding back CKE, CCS and FIN records.

totalSize

private int totalSize

Constructor Detail

TdsTlsOutputStream

TdsTlsOutputStream(java.io.OutputStream out)

Constructs a TdsTlsOutputStream based on an underlying output stream.

Parameters:

out - the underlying output stream

Method Detail

deferRecord

private void deferRecord(byte[] record,
                         int len)

Holds back a record for batched transmission.

Parameters:

record - the TLS record to buffer

len - the length of the TLS record to buffer

flushBufferedRecords

private void flushBufferedRecords()
                           throws java.io.IOException

Transmits the buffered batch of records.

Throws:

java.io.IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws java.io.IOException

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException

putTdsPacket

void putTdsPacket(byte[] b,
                  int len)
           throws java.io.IOException

Write a TDS packet containing the TLS record(s).

Parameters:

b - the TLS record

len - the length of the TLS record

Throws:

java.io.IOException

flush

public void flush()
           throws java.io.IOException

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.FilterOutputStream

Throws:

java.io.IOException