com.croftsoft.core.util.cache.secure
Class SecureInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          com.croftsoft.core.util.cache.secure.SecureInputStream

All Implemented Interfaces:

Closeable

public class SecureInputStream
extends FilterInputStream

A FilterInputStream which will throw a SecurityException if the stream content does not have the digest expected.

Version:

1999-04-13

See Also:

DigestInputStream, MessageDigest

Author:

David Wallace Croft

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

SecureInputStream(InputStream inputStream, String algorithm, byte[] digest)

Method Summary

int	read()
int	read(byte[] byteArray, int offset, int length)

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

SecureInputStream

public SecureInputStream(InputStream inputStream,
                         String algorithm,
                         byte[] digest)
                  throws NoSuchAlgorithmException

Parameters:

algorithm - The MessageDigest algorithm to use.

digest - The expected digest.

Throws:

NoSuchAlgorithmException

Method Detail

read

public int read()
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

SecurityException - If the end of the stream is reached and the digest is not what is expected.

IOException

read

public int read(byte[] byteArray,
                int offset,
                int length)
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

SecurityException - If the end of the stream is reached and the digest is not what is expected.

IOException