Class HmacMD2

java.lang.Object
javax.crypto.MacSpi
com.ibm.crypto.hdwrCCA.provider.HmacMD2
All Implemented Interfaces:
Cloneable
public final class HmacMD2 extends MacSpi implements Cloneable
This is an implementation of the HMAC-MD2 algorithm.

  • Constructor Summary

    Constructors
    Constructor
    Description
    HmacMD2()
    Standard constructor, creates a new HmacMD2 instance.

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    clone()
     
    protected byte[]
    engineDoFinal()
    Completes the HMAC computation and resets the HMAC for further use, maintaining the secret key that the HMAC was initialized with.
    protected int
    engineGetMacLength()
    Returns the length of the HMAC in bytes.
    protected void
    engineInit(Key key, AlgorithmParameterSpec params)
    Initializes the HMAC with the given secret key and algorithm parameters.
    protected void
    engineReset()
    Resets the HMAC for further use, maintaining the secret key that the HMAC was initialized with.
    protected void
    engineUpdate(byte input)
    Processes the given byte.
    protected void
    engineUpdate(byte[] input, int offset, int len)
    Processes the first len bytes in input, starting at offset.

    Methods inherited from class MacSpi

    engineUpdate

    Methods inherited from class Object

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

  • Constructor Details

    • HmacMD2

      public HmacMD2()
      Standard constructor, creates a new HmacMD2 instance. Verify the JCE framework in the constructor.
      Throws:
      SecurityException - if fails to verify the JCE framework.

  • Method Details

    • engineGetMacLength

      protected int engineGetMacLength()
      Returns the length of the HMAC in bytes.
      Specified by:
      engineGetMacLength in class MacSpi
      Returns:
      the HMAC length in bytes.

    • engineInit

      protected void engineInit(Key key, AlgorithmParameterSpec params) throws InvalidKeyException, InvalidAlgorithmParameterException
      Initializes the HMAC with the given secret key and algorithm parameters.
      Specified by:
      engineInit in class MacSpi
      Parameters:
      key - the secret key, must be a RAW format SecretKey
      params - the algorithm parameters. This parameter is ignored
      Throws:
      InvalidKeyException - if the given key is inappropriate for initializing this MAC.
      InvalidAlgorithmParameterException - if the given algorithm parameters are inappropriate for this MAC. This should not occur, since the params parameter is currently ignored.

    • engineUpdate

      protected void engineUpdate(byte input)
      Processes the given byte.
      Specified by:
      engineUpdate in class MacSpi
      Parameters:
      input - the input byte to be processed.

    • engineUpdate

      protected void engineUpdate(byte[] input, int offset, int len)
      Processes the first len bytes in input, starting at offset.
      Specified by:
      engineUpdate in class MacSpi
      Parameters:
      input - the input buffer.
      offset - the offset in input where the input starts.
      len - the number of bytes to process.

    • engineDoFinal

      protected byte[] engineDoFinal()
      Completes the HMAC computation and resets the HMAC for further use, maintaining the secret key that the HMAC was initialized with.
      Specified by:
      engineDoFinal in class MacSpi
      Returns:
      the HMAC result.

    • engineReset

      protected void engineReset()
      Resets the HMAC for further use, maintaining the secret key that the HMAC was initialized with.
      Specified by:
      engineReset in class MacSpi

    • clone

      public Object clone()
      Overrides:
      clone in class MacSpi