org.kuali.rice.ksb.security
Class SignatureSigningOutputStream

java.lang.Object
  java.io.OutputStream
      javax.servlet.ServletOutputStream
          org.kuali.rice.ksb.security.SignatureSigningOutputStream

All Implemented Interfaces:

Closeable, Flushable

public class SignatureSigningOutputStream
extends javax.servlet.ServletOutputStream

An OutputStream which decorates another OutputStream with a wrapper that digitally signs the data when the OutputStream is closed. Since this class does not know where the resulting digital signature will reside, a DigitalSigner will be invoked to execute the actual signing of the message (i.e. put it in a header).

Author:

Kuali Rice Team (rice.collab@kuali.org)

Field Summary

private BufferedOutputStream	bufferedDataHoldingStream
private ByteArrayOutputStream	dataHoldingStream
private boolean	delayWrite
private DigitalSigner	signer
private OutputStream	wrappedOutputStream

Constructor Summary

SignatureSigningOutputStream(DigitalSigner signer, OutputStream wrappedOutputStream, boolean delayWrite)
Constructs a SignatureSigningOutputStream with the given DigitalSigner and underlying OutputStream.

Method Summary

void	close()
void	write(int data)

Methods inherited from class javax.servlet.ServletOutputStream

print, print, print, print, print, print, print, println, println, println, println, println, println, println, println

Methods inherited from class java.io.OutputStream

flush, write, write

Methods inherited from class java.lang.Object

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

Field Detail

delayWrite

private boolean delayWrite

signer

private DigitalSigner signer

bufferedDataHoldingStream

private BufferedOutputStream bufferedDataHoldingStream

dataHoldingStream

private ByteArrayOutputStream dataHoldingStream

wrappedOutputStream

private OutputStream wrappedOutputStream

Constructor Detail

SignatureSigningOutputStream

public SignatureSigningOutputStream(DigitalSigner signer,
                                    OutputStream wrappedOutputStream,
                                    boolean delayWrite)

Constructs a SignatureSigningOutputStream with the given DigitalSigner and underlying OutputStream. If true, the delayWrite boolean indicates that the stream should store all data internally until the stream is closed, at which point it should forward all data to the wrapped OutputStream. If delayWrite is false, then the data will be forwarded immediately.

Method Detail

write

public void write(int data)
           throws IOException

Specified by:

write in class OutputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

Throws:

IOException