net.sourceforge.jtds.ssl
Class TdsTlsOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          net.sourceforge.jtds.ssl.TdsTlsOutputStream

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

  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

  (package private)

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

  Method Summary

  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

  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

  Throws:

  java.io.IOException