gnu.crypto.jce.mac
Class HMacMD4Spi

java.lang.Object
  |
  +--javax.crypto.MacSpi
        |
        +--gnu.crypto.jce.mac.MacAdapter
              |
              +--gnu.crypto.jce.mac.HMacMD4Spi

public final class HMacMD4Spi

extends gnu.crypto.jce.mac.MacAdapter

The implementation of the HMAC-MD4 Service Provider Interface (SPI) adapter.

Field Summary

protected java.util.Map	attributes Our MAC attributes.
protected IMac	mac Our MAC instance.

Constructor Summary

HMacMD4Spi()

Method Summary

java.lang.Object	clone() Returns a clone if the implementation is cloneable.
protected byte[]	engineDoFinal() Completes the MAC computation and resets the MAC for further use, maintaining the secret key that the MAC was initialized with.
protected int	engineGetMacLength() Returns the length of the MAC in bytes.
protected void	engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params) Initializes the MAC with the given (secret) key and algorithm parameters.
protected void	engineReset() Resets the MAC for further use, maintaining the secret key that the MAC was initialized with.
protected void	engineUpdate(byte b) Processes the given byte.
protected void	engineUpdate(byte[] in, int off, int len) Processes the first len bytes in input, starting at offset inclusive.

Methods inherited from class java.lang.Object

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

Field Detail

mac

protected IMac mac

Our MAC instance.

attributes

protected java.util.Map attributes

Our MAC attributes.

Constructor Detail

HMacMD4Spi

public HMacMD4Spi()

Method Detail

clone

public java.lang.Object clone()

Description copied from class: MacSpi

Returns a clone if the implementation is cloneable.

Overrides:

clone in class MacSpi

Returns:

a clone if the implementation is cloneable.

engineDoFinal

protected byte[] engineDoFinal()

Description copied from class: MacSpi

Completes the MAC computation and resets the MAC for further use, maintaining the secret key that the MAC was initialized with.

Specified by:

engineDoFinal in class MacSpi

Returns:

the MAC result.

engineGetMacLength

protected int engineGetMacLength()

Description copied from class: MacSpi

Returns the length of the MAC in bytes.

Specified by:

engineGetMacLength in class MacSpi

Returns:

the MAC length in bytes.

engineInit

protected void engineInit(java.security.Key key,
                          java.security.spec.AlgorithmParameterSpec params)
                   throws java.security.InvalidKeyException,
                          java.security.InvalidAlgorithmParameterException

Description copied from class: MacSpi

Initializes the MAC with the given (secret) key and algorithm parameters.

Specified by:

engineInit in class MacSpi

Parameters:

key - - the (secret) key.

params - - the algorithm parameters.

Throws:

java.security.InvalidKeyException - if the given key is inappropriate for initializing this MAC.

java.security.InvalidAlgorithmParameterException - - if the given algorithm parameters are inappropriate for this MAC.

engineReset

protected void engineReset()

Description copied from class: MacSpi

Resets the MAC for further use, maintaining the secret key that the MAC was initialized with.

Specified by:

engineReset in class MacSpi

engineUpdate

protected void engineUpdate(byte b)

Description copied from class: MacSpi

Processes the given byte.

Specified by:

engineUpdate in class MacSpi

Parameters:

b - - the input byte to be processed.

engineUpdate

protected void engineUpdate(byte[] in,
                            int off,
                            int len)

Description copied from class: MacSpi

Processes the first len bytes in input, starting at offset inclusive.

Specified by:

engineUpdate in class MacSpi

Parameters:

in - the input buffer.

off - the offset in input where the input starts.

len - the number of bytes to process.