org.bouncycastle.crypto.macs
Class OldHMac

java.lang.Object
  |
  +--org.bouncycastle.crypto.macs.OldHMac

All Implemented Interfaces:

Mac

public class OldHMac

extends java.lang.Object

implements Mac

HMAC implementation based on RFC2104 H(K XOR opad, H(K XOR ipad, text))

Constructor Summary

OldHMac(Digest digest)
Deprecated. uses incorrect pad for SHA-512 and SHA-384 use HMac.

Method Summary

int	doFinal(byte[] out, int outOff) Compute the final stage of the MAC writing the output to the out parameter.
java.lang.String	getAlgorithmName() Return the name of the algorithm the MAC implements.
int	getMacSize() Return the block size for this MAC (in bytes).
Digest	getUnderlyingDigest()
void	init(CipherParameters params) Initialise the MAC.
void	reset() Reset the mac generator.
void	update(byte in) add a single byte to the mac for processing.
void	update(byte[] in, int inOff, int len)

Methods inherited from class java.lang.Object

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

Constructor Detail

OldHMac

public OldHMac(Digest digest)

Deprecated. uses incorrect pad for SHA-512 and SHA-384 use HMac.

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

Description copied from interface: Mac

Return the name of the algorithm the MAC implements.

Specified by:

getAlgorithmName in interface Mac

Following copied from interface: org.bouncycastle.crypto.Mac

Returns:

the name of the algorithm the MAC implements.

getUnderlyingDigest

public Digest getUnderlyingDigest()

init

public void init(CipherParameters params)

Description copied from interface: Mac

Initialise the MAC.

Specified by:

init in interface Mac

Following copied from interface: org.bouncycastle.crypto.Mac

Parameters:

params - the key and other data required by the MAC.

Throws:

java.lang.IllegalArgumentException - if the params argument is inappropriate.

getMacSize

public int getMacSize()

Description copied from interface: Mac

Return the block size for this MAC (in bytes).

Specified by:

getMacSize in interface Mac

Following copied from interface: org.bouncycastle.crypto.Mac

Returns:

the block size for this MAC in bytes.

update

public void update(byte in)

Description copied from interface: Mac

add a single byte to the mac for processing.

Specified by:

update in interface Mac

Following copied from interface: org.bouncycastle.crypto.Mac

Parameters:

in - the byte to be processed.

Throws:

java.lang.IllegalStateException - if the MAC is not initialised.

update

public void update(byte[] in,
                   int inOff,
                   int len)

Specified by:

update in interface Mac

Following copied from interface: org.bouncycastle.crypto.Mac

Parameters:

in - the array containing the input.

inOff - the index in the array the data begins at.

len - the length of the input starting at inOff.

Throws:

java.lang.IllegalStateException - if the MAC is not initialised.

DataLengthException - if there isn't enough data in in.

doFinal

public int doFinal(byte[] out,
                   int outOff)

Description copied from interface: Mac

Compute the final stage of the MAC writing the output to the out parameter.

doFinal leaves the MAC in the same state it was after the last init.

Specified by:

doFinal in interface Mac

Following copied from interface: org.bouncycastle.crypto.Mac

Parameters:

out - the array the MAC is to be output to.

outOff - the offset into the out buffer the output is to start at.

Throws:

DataLengthException - if there isn't enough space in out.

java.lang.IllegalStateException - if the MAC is not initialised.

reset

public void reset()

Reset the mac generator.

Specified by:

reset in interface Mac