Package org.bouncycastle.jcajce.provider.symmetric.util

Class BaseMac

java.lang.Object

javax.crypto.MacSpi

org.bouncycastle.jcajce.provider.symmetric.util.BaseMac

All Implemented Interfaces:

PBE

Direct Known Subclasses:

DES.CBCMAC, DES.DES64, DES.DES64with7816d4, DESede.CBCMAC, DESede.DESede64, DESede.DESede64with7816d4, MD5.HashMac, SHA1.HashMac, SHA1.SHA1Mac, SHA256.HashMac, SHA384.HashMac, SHA512.HashMac

public class BaseMac
extends MacSpi
implements PBE

Nested Class Summary

Nested classes/interfaces inherited from interface org.bouncycastle.jcajce.provider.symmetric.util.PBE

PBE.Util

Field Summary

Fields inherited from interface org.bouncycastle.jcajce.provider.symmetric.util.PBE

MD5, OPENSSL, PKCS12, PKCS5S1, PKCS5S1_UTF8, PKCS5S2, PKCS5S2_UTF8, SHA1, SHA256

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BaseMac(Mac macEngine)
protected	BaseMac(Mac macEngine, int pbeType, int pbeHash, int keySize)

Method Summary

Modifier and Type	Method	Description
protected byte[]	engineDoFinal()	Computes the digest of this MAC based on the data previously specified in MacSpi.engineUpdate(byte) calls.
protected int	engineGetMacLength()	Returns the length of this MAC (in bytes).
protected void	engineInit(Key key, AlgorithmParameterSpec params)	Initializes this MacSpi instance with the specified key and algorithm parameters.
protected void	engineReset()	Resets this MacSpi instance to its initial state.
protected void	engineUpdate(byte input)	Updates this MacSpi instance with the specified byte.
protected void	engineUpdate(byte[] input, int offset, int len)	Updates this MacSpi instance with the data from the specified buffer input from the specified offset and length len.

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 Details

BaseMac

protected BaseMac(Mac macEngine)

BaseMac

protected BaseMac(Mac macEngine,
int pbeType,
int pbeHash,
int keySize)

Method Details

engineInit

protected void engineInit(Key key,
AlgorithmParameterSpec params)
                   throws InvalidKeyException,
InvalidAlgorithmParameterException

Description copied from class: MacSpi

Initializes this MacSpi instance with the specified key and algorithm parameters.

Specified by:

engineInit in class MacSpi

Parameters:

key - the key to initialize this algorithm.

params - the parameters for this algorithm.

Throws:

InvalidKeyException - if the specified key cannot be used to initialize this algorithm, or it is null.

InvalidAlgorithmParameterException - if the specified parameters cannot be used to initialize this algorithm.

engineGetMacLength

protected int engineGetMacLength()

Description copied from class: MacSpi

Returns the length of this MAC (in bytes).

Specified by:

engineGetMacLength in class MacSpi

Returns:

the length of this MAC (in bytes).

engineReset

protected void engineReset()

Description copied from class: MacSpi

Resets this MacSpi instance to its initial state.

This MacSpi instance is reverted to its initial state and can be used to start the next MAC computation with the same parameters or initialized with different parameters.

Specified by:

engineReset in class MacSpi

engineUpdate

protected void engineUpdate(byte input)

Description copied from class: MacSpi

Updates this MacSpi instance with the specified byte.

Specified by:

engineUpdate in class MacSpi

Parameters:

input - the byte.

engineUpdate

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

Description copied from class: MacSpi

Updates this MacSpi instance with the data from the specified buffer input from the specified offset and length len.

Specified by:

engineUpdate in class MacSpi

Parameters:

input - the buffer.

offset - the offset in the buffer.

len - the length of the data in the buffer.

engineDoFinal

protected byte[] engineDoFinal()

Description copied from class: MacSpi

Computes the digest of this MAC based on the data previously specified in MacSpi.engineUpdate(byte) calls.

This MacSpi instance is reverted to its initial state and can be used to start the next MAC computation with the same parameters or initialized with different parameters.

Specified by:

engineDoFinal in class MacSpi

Returns:

the generated digest.