org.bouncycastle.crypto.macs

Class OldHMac

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 statge of the MAC writing the output to the out parameter.
String
getAlgorithmName()
Return the name of the algorithm the MAC implements.
int
getMacSize()
Return the block size for this cipher (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)

Constructor Details

OldHMac

public OldHMac(Digest digest)

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

Method Details

doFinal

public int doFinal(byte[] out,
                   int outOff)
Compute the final statge 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
Parameters:
out - the array the MAC is to be output to.
outOff - the offset into the out buffer the output is to start at.

getAlgorithmName

public String getAlgorithmName()
Return the name of the algorithm the MAC implements.
Specified by:
getAlgorithmName in interface Mac
Returns:
the name of the algorithm the MAC implements.

getMacSize

public int getMacSize()
Return the block size for this cipher (in bytes).
Specified by:
getMacSize in interface Mac
Returns:
the block size for this cipher in bytes.

getUnderlyingDigest

public Digest getUnderlyingDigest()

init

public void init(CipherParameters params)
Initialise the MAC.
Specified by:
init in interface Mac
Parameters:
params - the key and other data required by the MAC.

reset

public void reset()
Reset the mac generator.
Specified by:
reset in interface Mac

update

public void update(byte in)
add a single byte to the mac for processing.
Specified by:
update in interface Mac
Parameters:
in - the byte to be processed.

update

public void update(byte[] in,
                   int inOff,
                   int len)
Specified by:
update in interface 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.