org.bouncycastle.crypto.macs

Class BlockCipherMac

Implemented Interfaces:
Mac

public class BlockCipherMac
extends java.lang.Object
implements Mac

Constructor Summary

BlockCipherMac(BlockCipher cipher)
Deprecated. use CBCBlockCipherMac
BlockCipherMac(BlockCipher cipher, int macSizeInBits)
Deprecated. use CBCBlockCipherMac

Method Summary

int
doFinal(byte[] out, int outOff)
String
getAlgorithmName()
int
getMacSize()
void
init(CipherParameters params)
void
reset()
Reset the mac generator.
void
update(byte in)
void
update(byte[] in, int inOff, int len)

Constructor Details

BlockCipherMac

public BlockCipherMac(BlockCipher cipher)

Deprecated. use CBCBlockCipherMac

create a standard MAC based on a block cipher. This will produce an authentication code half the length of the block size of the cipher.
Parameters:
cipher - the cipher to be used as the basis of the MAC generation.

BlockCipherMac

public BlockCipherMac(BlockCipher cipher,
                      int macSizeInBits)

Deprecated. use CBCBlockCipherMac

create a standard MAC based on a block cipher with the size of the MAC been given in bits.

Note: the size of the MAC must be at least 16 bits (FIPS Publication 113), and in general should be less than the size of the block cipher as it reduces the chance of an exhaustive attack (see Handbook of Applied Cryptography).

Parameters:
cipher - the cipher to be used as the basis of the MAC generation.
macSizeInBits - the size of the MAC in bits, must be a multiple of 8.

Method Details

doFinal

public int doFinal(byte[] out,
                   int outOff)
Specified by:
doFinal in interface Mac

getAlgorithmName

public String getAlgorithmName()
Specified by:
getAlgorithmName in interface Mac

getMacSize

public int getMacSize()
Specified by:
getMacSize in interface Mac

init

public void init(CipherParameters params)
Specified by:
init in interface Mac

reset

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

update

public void update(byte in)
Specified by:
update in interface Mac

update

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