org.bouncycastle.crypto
Interface Mac

All Known Implementing Classes:
I2PHMac

public interface Mac

The base interface for implementations of message authentication codes (MACs). modified by jrandom to use the session key byte array directly


Method Summary
 int doFinal(byte[] out, int outOff)
          Compute the final statge 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 cipher (in bytes).
 void init(byte[] key)
          Initialise the MAC.
 void reset()
          Reset the MAC.
 void update(byte in)
          add a single byte to the mac for processing.
 void update(byte[] in, int inOff, int len)
           
 

Method Detail

init

void init(byte[] key)
          throws java.lang.IllegalArgumentException
Initialise the MAC.

Parameters:
key - the key required by the MAC.
Throws:
java.lang.IllegalArgumentException - if the params argument is inappropriate.

getAlgorithmName

java.lang.String getAlgorithmName()
Return the name of the algorithm the MAC implements.

Returns:
the name of the algorithm the MAC implements.

getMacSize

int getMacSize()
Return the block size for this cipher (in bytes).

Returns:
the block size for this cipher in bytes.

update

void update(byte in)
            throws java.lang.IllegalStateException
add a single byte to the mac for processing.

Parameters:
in - the byte to be processed.
Throws:
java.lang.IllegalStateException - if the MAC is not initialised.

update

void update(byte[] in,
            int inOff,
            int len)
            throws java.lang.IllegalStateException
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.

doFinal

int doFinal(byte[] out,
            int outOff)
            throws java.lang.IllegalStateException
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.

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

reset

void reset()
Reset the MAC. At the end of resetting the MAC should be in the in the same state it was after the last init (if there was one).