com.ibm.crypto.hdwrCCA.provider

Class PBM

java.lang.Object

javax.crypto.MacSpi

com.ibm.crypto.hdwrCCA.provider.PBM

All Implemented Interfaces:

java.lang.Cloneable

public final class PBM
extends javax.crypto.MacSpi
implements java.lang.Cloneable

This is an implementation of the HMAC-SHA1 algorithm.

Constructor Summary

Constructors

Constructor and Description
PBM() Empty constructor Verify the JCE framework in the constructor.

Method Summary

Modifier and Type	Method and Description
protected byte[]	engineDoFinal() Completes the PBM computation and resets the PBM for further use, maintaining the secret key that the PBM was initialized with.
protected int	engineGetMacLength() Returns the length of the PBM in bytes.
protected void	engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params) Initializes the PBM with the given secret key and algorithm parameters.
protected void	engineReset() Resets the PBM for further use, maintaining the secret key that the PBM was initialized with.
protected void	engineUpdate(byte input) Processes the given byte.
protected void	engineUpdate(byte[] input, int offset, int len) Processes the first len bytes in input, starting at offset.

Methods inherited from class javax.crypto.MacSpi

clone, engineUpdate

Methods inherited from class java.lang.Object

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

Constructor Detail

PBM

public PBM()
    throws java.security.NoSuchAlgorithmException

Empty constructor Verify the JCE framework in the constructor.

Throws:

java.security.NoSuchAlgorithmException - if the required cipher mode (CBC) is unavailable

java.lang.SecurityException - if this constructor fails to authenticate the JCE framework.

Method Detail

engineGetMacLength

protected int engineGetMacLength()

Returns the length of the PBM in bytes.

Specified by:

engineGetMacLength in class javax.crypto.MacSpi

Returns:

the PBM length in bytes.

engineInit

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

Initializes the PBM with the given secret key and algorithm parameters.

Specified by:

engineInit in class javax.crypto.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.

engineUpdate

protected void engineUpdate(byte input)

Processes the given byte.

Specified by:

engineUpdate in class javax.crypto.MacSpi

Parameters:

input - the input byte to be processed.

engineUpdate

protected void engineUpdate(byte[] input,
                            int offset,
                            int len)

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

Specified by:

engineUpdate in class javax.crypto.MacSpi

Parameters:

input - the input buffer.

offset - the offset in input where the input starts.

len - the number of bytes to process.

engineDoFinal

protected byte[] engineDoFinal()

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

Specified by:

engineDoFinal in class javax.crypto.MacSpi

Returns:

the PBM result.

engineReset

protected void engineReset()

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

Specified by:

engineReset in class javax.crypto.MacSpi