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Java Source Code / Java Documentation » Template Engine » ostermillerutils » com.Ostermiller.util

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

java.io .OutputStream

java.io .FilterOutputStream

com.Ostermiller.util .MD5OutputStream

MD5OutputStream

public class MD5OutputStream extends FilterOutputStream (Code)

Implements MD5 functionality on a stream. More information about this class is available from ostermiller.org.

This class produces a 128-bit "fingerprint" or "message digest" for all data written to this stream. It is conjectured that it is computationally infeasible to produce two messages having the same message digest, or to produce any message having a given pre-specified target message digest. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA.

For more information see RFC1321.
See Also:   MD5
See Also:   MD5InputStream
author:
   Santeri Paavolainen http://www.helsinki.fi/~sjpaavol/programs/md5/
author:
   Stephen Ostermiller http://ostermiller.org/contact.pl?regarding=Java+Utilities
since:
   ostermillerutils 1.00.00

Constructor Summary
public	MD5OutputStream(OutputStream out)

Method Summary
public byte[]	getHash() Returns array of bytes representing hash of the stream so far.
public String	getHashString() Get a 32-character hex representation representing hash of the stream so far.
public void	write(int b) Writes the specified byte to this output stream.
public void	write(byte b, int off, int len) Writes length bytes from the specified byte array starting a offset off to this output stream.

Constructor Detail

MD5OutputStream
public MD5OutputStream(OutputStream out)(Code)
	Creates MD5OutputStream Parameters: out - The output stream since: ostermillerutils 1.00.00

Method Detail

getHash
public byte[] getHash()(Code)
	Returns array of bytes representing hash of the stream so far. Array of 16 bytes, the hash of all written bytes. since: ostermillerutils 1.00.00

getHashString
public String getHashString()(Code)
	Get a 32-character hex representation representing hash of the stream so far. A string containing the hash of all written bytes. since: ostermillerutils 1.00.00

write
public void write(int b) throws IOException(Code)
	Writes the specified byte to this output stream. Parameters: b - the byte. throws: IOException - if an I/O error occurs. since: ostermillerutils 1.00.00

write
public void write(byte b, int off, int len) throws IOException(Code)
	Writes length bytes from the specified byte array starting a offset off to this output stream. Parameters: b - the data. Parameters: off - the start offset in the data. Parameters: len - the number of bytes to write. throws: IOException - if an I/O error occurs. since: ostermillerutils 1.00.00

Fields inherited from java.io.FilterOutputStream

protected OutputStream out(Code)(Java Doc)

Methods inherited from java.io.FilterOutputStream

public void close() throws IOException(Code)(Java Doc)
public void flush() throws IOException(Code)(Java Doc)
public void write(int b) throws IOException(Code)(Java Doc)
public void write(byte b) throws IOException(Code)(Java Doc)
public void write(byte b, int off, int len) throws IOException(Code)(Java Doc)

Methods inherited from java.io.OutputStream

public void close() throws IOException(Code)(Java Doc)
public void flush() throws IOException(Code)(Java Doc)
abstract public void write(int b) throws IOException(Code)(Java Doc)
public void write(byte b) throws IOException(Code)(Java Doc)
public void write(byte b, int off, int len) throws IOException(Code)(Java Doc)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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