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gnu.crypto.mac

Class MacInputStream

public class MacInputStream extends FilterInputStream

A filtering input stream that computes a MAC (message authentication code) over all data read from the stream.

Version: $Revision: 1.2 $

Constructor Summary
	MacInputStream(InputStream in, IMac mac) Creates a new MacInputStream.

Method Summary
IMac	getMac() Returns the MAC this stream is updating.
void	on(boolean flag) Turns the digesting state on or off.
int	read()
int	read(byte[] buf, int off, int len)
void	setMac(IMac mac) Sets the MAC this stream is updating, which must have already been initialized.

Constructor Detail

MacInputStream

public MacInputStream(InputStream in, IMac mac)

Creates a new MacInputStream. The stream is initially set to digest data written, the mac argument must have already been initialized, and the mac argument is not cloned.

Parameters: in The underlying input stream. mac The mac instance to use.

Method Detail

getMac

public IMac getMac()

Returns the MAC this stream is updating.

Returns: The MAC.

on

public void on(boolean flag)

Turns the digesting state on or off. When off, the MAC will not be updated when data is written to the stream.

Parameters: flag The new digesting state.

read

public int read()

read

public int read(byte[] buf, int off, int len)

setMac

public void setMac(IMac mac)

Sets the MAC this stream is updating, which must have already been initialized. The argument is not cloned by this method.

Parameters: mac The new MAC.

Throws: NullPointerException If the argument is null.

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