org.bouncycastle.crypto.io
Class CipherInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          org.bouncycastle.crypto.io.CipherInputStream

All Implemented Interfaces:

java.io.Closeable

public class CipherInputStream
extends java.io.FilterInputStream

A CipherInputStream is composed of an InputStream and a BufferedBlockCipher so that read() methods return data that are read in from the underlying InputStream but have been additionally processed by the Cipher. The Cipher must be fully initialized before being used by a CipherInputStream.

For example, if the Cipher is initialized for decryption, the CipherInputStream will attempt to read in data and decrypt them, before returning the decrypted data.

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

CipherInputStream(java.io.InputStream is, BufferedBlockCipher cipher)
Constructs a CipherInputStream from an InputStream and a BufferedBlockCipher.

CipherInputStream(java.io.InputStream is, StreamCipher cipher)

Method Summary

int	available()
void	close()
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
long	skip(long n)

Methods inherited from class java.io.FilterInputStream

mark, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

CipherInputStream

public CipherInputStream(java.io.InputStream is,
                         BufferedBlockCipher cipher)

Constructs a CipherInputStream from an InputStream and a BufferedBlockCipher.

CipherInputStream

public CipherInputStream(java.io.InputStream is,
                         StreamCipher cipher)

Method Detail

read

public int read()
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

skip

public long skip(long n)
          throws java.io.IOException

Overrides:

skip in class java.io.FilterInputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.FilterInputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Overrides:

close in class java.io.FilterInputStream

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.FilterInputStream