rice.p2p.util
Class EncryptedInputStream

java.lang.Object
  java.io.InputStream
      rice.p2p.util.EncryptedInputStream

All Implemented Interfaces:

java.io.Closeable

public class EncryptedInputStream
extends java.io.InputStream

Version:

$Id: EncryptedInputStream.java 3613 2007-02-15 14:45:14Z jstewart $

Author:

Alan Mislove

Field Summary

protected byte[]	buffer
protected int	bufferLength
protected byte[]	key
protected java.security.PrivateKey	privateKey
protected java.io.DataInputStream	stream

Constructor Summary

EncryptedInputStream(java.security.PrivateKey privateKey, java.io.InputStream stream)
Builds an encrypted inputstream given a private key to decrypt thing under

Method Summary

int	available() Returns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.
void	close() Closes this input stream and releases any system resources associated with the stream.
int	read() Reads the next byte of data from the input stream.
int	read(byte[] b, int off, int len) Reads up to len bytes of data from the input stream into an array of bytes.
protected void	readBuffer() Internal method which reads in the next chunk of buffered data

Methods inherited from class java.io.InputStream

mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

privateKey

protected java.security.PrivateKey privateKey

key

protected byte[] key

stream

protected java.io.DataInputStream stream

buffer

protected byte[] buffer

bufferLength

protected int bufferLength

Constructor Detail

EncryptedInputStream

public EncryptedInputStream(java.security.PrivateKey privateKey,
                            java.io.InputStream stream)
                     throws java.io.IOException

Builds an encrypted inputstream given a private key to decrypt thing under

Parameters:

key - The key

stream - The underlying stream

Throws:

java.io.IOException

Method Detail

read

public int read()
         throws java.io.IOException

Reads the next byte of data from the input stream. T

Specified by:

read in class java.io.InputStream

Returns:

the next byte of data, or -1 if the end of the stream is reached.

Throws:

java.io.IOException

read

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

Reads up to len bytes of data from the input stream into an array of bytes. An attempt is made to read as many as len bytes, but a smaller number may be read, possibly zero. The number of bytes actually read is returned as an integer.

Overrides:

read in class java.io.InputStream

Parameters:

b - the buffer into which the data is read.

off - the start offset in array b at which the data is written.

len - the maximum number of bytes to read.

Returns:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Throws:

java.io.IOException

readBuffer

protected void readBuffer()
                   throws java.io.IOException

Internal method which reads in the next chunk of buffered data

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Returns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream. The next caller might be the same thread or or another thread.

Overrides:

available in class java.io.InputStream

Returns:

the number of bytes that can be read from this input stream without blocking.

Throws:

java.io.IOException - if an I/O error occurs.

close

public void close()
           throws java.io.IOException

Closes this input stream and releases any system resources associated with the stream.

Specified by:

close in interface java.io.Closeable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException - if an I/O error occurs.