Package net.handle.hdllib

Class SignedOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

net.handle.hdllib.SignedOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class SignedOutputStream
extends FilterOutputStream

Objects of this class can be used to sign the contents of a stream that can be verified by a SignedInputStream class. Note: This is not a part of the official handle protocol specification. This was introduced by CNRI solely for replication in the Handle.net software.

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor	Description
SignedOutputStream(OutputStream out)
SignedOutputStream(X509Certificate certificate, PrivateKey sourceKey, OutputStream out, Socket socket)
SignedOutputStream(PrivateKey sourceKey, OutputStream out)	Create a stream that can verify the data read from the stream in blocks.

Method Summary

Modifier and Type	Method	Description
void	signBlock()	Signs the bytes written since the last signature on the stream.
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)	Write a byte to the stream.

Methods inherited from class java.io.FilterOutputStream

close, flush

Methods inherited from class java.io.OutputStream

nullOutputStream

Methods inherited from class java.lang.Object

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

Constructor Details

SignedOutputStream

public SignedOutputStream(PrivateKey sourceKey,
 OutputStream out)
                   throws HandleException,
IOException

Create a stream that can verify the data read from the stream in blocks. The caller should call the verifyBlock method at the end of every block of data that needs to be verified. verifyBlock must be called at the same position in the stream that signBlock was called in the parallel SignedOutputStream object that generated the stream.

Throws:

HandleException

IOException

SignedOutputStream

public SignedOutputStream(OutputStream out)
                   throws IOException

Throws:

IOException

SignedOutputStream

public SignedOutputStream(X509Certificate certificate,
 PrivateKey sourceKey,
 OutputStream out,
 Socket socket)
                   throws HandleException,
IOException

Throws:

HandleException

IOException

Method Details

write

public void write(int b)
           throws IOException

Write a byte to the stream.

Overrides:

write in class FilterOutputStream

Throws:

IOException

write

public void write(byte[] b)
           throws IOException

Overrides:

write in class FilterOutputStream

Throws:

IOException

write

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

Overrides:

write in class FilterOutputStream

Throws:

IOException

signBlock

public void signBlock()
               throws IOException,
SignatureException

Signs the bytes written since the last signature on the stream. This should be called at the exact same point in the stream as the verifyBlock method in the SignedInputStream class.

Throws:

IOException

SignatureException