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edu.emory.mathcs.util.security.io
Class SecureByteArrayOutputStream  

java.lang.Object
  java.io.OutputStream
      java.io.ByteArrayOutputStream
          edu.emory.mathcs.util.security.io.SecureByteArrayOutputStream

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public final class SecureByteArrayOutputStream

extends java.io.ByteArrayOutputStream

Variant of ByteArrayOutputStream that ensures that all data is cleared from temporary arrays before they are unreferenced. Hence, this class can be safely used to convert sensitive information into byte arrays, provided that it is closed 55 after use.

Version:

1.0

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Field Summary

 

Fields inherited from class java.io.ByteArrayOutputStream

buf, count

 

Constructor Summary

SecureByteArrayOutputStream()

SecureByteArrayOutputStream(int size)

 

Method Summary
void	close()           Closing a SecureByteArrayOutputStream causes it to be #reset(), i.e.
void	reset()           Resets the count field of this byte array output stream to zero and clears up the entire buffer with zeros, so that all currently accumulated output in the ouput stream is discarded.
void	write(byte[] b, int off, int len)           This method writes len bytes from the passed in array buf starting at index offset into the internal buffer.
void	write(int b)           This method writes the writes the specified byte into the internal buffer.

 

Methods inherited from class java.io.ByteArrayOutputStream

size, toByteArray, toString, toString, toString, writeTo

 

Methods inherited from class java.io.OutputStream

flush, write

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

SecureByteArrayOutputStream

public SecureByteArrayOutputStream()

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SecureByteArrayOutputStream

public SecureByteArrayOutputStream(int size)

Method Detail

write

public void write(int b)

Description copied from class: java.io.ByteArrayOutputStream

This method writes the writes the specified byte into the internal buffer.

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write

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

Description copied from class: java.io.ByteArrayOutputStream

This method writes len bytes from the passed in array buf starting at index offset into the internal buffer.

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reset

public void reset()

Resets the count field of this byte array output stream to zero and clears up the entire buffer with zeros, so that all currently accumulated output in the ouput stream is discarded. The output stream can be used again, reusing the already allocated buffer space.

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close

public void close()
           throws java.io.IOException

Closing a SecureByteArrayOutputStream causes it to be #reset(), i.e. all data is discarded.

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