Module ibm.crypto.hdwrcca
Package com.ibm.crypto.hdwrCCA.provider

Class MD2

java.lang.Object
java.security.MessageDigestSpi
com.ibm.crypto.hdwrCCA.provider.MD2
All Implemented Interfaces:
Cloneable
public final class MD2 extends MessageDigestSpi implements Cloneable
The MD2 class is used to compute an MD2 message digest over a given buffer of bytes. It is an implementation of the RSA Data Security Inc. MD2 algorithim as described in internet RFC 1319.

  • Constructor Summary

    Constructors
    Constructor
    Description
    MD2()
    Standard constructor, creates a new MD2 instance, allocates its buffers from the heap.

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    clone()
    Clones this object.
    protected byte[]
    engineDigest()
    Computes and returns the MD2 hash.
    protected int
    engineDigest(byte[] buf, int offset, int len)
    Computes and returns the MD2 hash in the buffer provided.
    protected int
    engineGetDigestLength()
    Return the digest length in bytes.
    protected void
    engineReset()
    Resets the MD2 information back to starting values.
    protected void
    engineUpdate(byte b)
    Update adds the passed byte to the digested data.
    protected void
    engineUpdate(byte[] input, int offset, int len)
    Update adds the selected part of an array of bytes to the digest.
    void
    init()
    Initialize the MD2 information.

    Methods inherited from class java.security.MessageDigestSpi

    engineUpdate

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • MD2

      public MD2()
      Standard constructor, creates a new MD2 instance, allocates its buffers from the heap.

  • Method Details

    • init

      public void init()
      Initialize the MD2 information.

    • engineReset

      protected void engineReset()
      Resets the MD2 information back to starting values.
      Specified by:
      engineReset in class MessageDigestSpi

    • engineGetDigestLength

      protected int engineGetDigestLength()
      Return the digest length in bytes.
      Overrides:
      engineGetDigestLength in class MessageDigestSpi

    • engineUpdate

      protected void engineUpdate(byte b)
      Update adds the passed byte to the digested data.
      Specified by:
      engineUpdate in class MessageDigestSpi

    • engineUpdate

      protected void engineUpdate(byte[] input, int offset, int len)
      Update adds the selected part of an array of bytes to the digest. This version is more efficient than the byte-at-a-time version; it avoids data copies and reduces per-byte call overhead.
      Specified by:
      engineUpdate in class MessageDigestSpi

    • engineDigest

      protected byte[] engineDigest()
      Computes and returns the MD2 hash.
      Specified by:
      engineDigest in class MessageDigestSpi
      Returns:
      the MD2 hash.

    • engineDigest

      protected int engineDigest(byte[] buf, int offset, int len) throws DigestException
      Computes and returns the MD2 hash in the buffer provided.
      Overrides:
      engineDigest in class MessageDigestSpi
      Parameters:
      buf - the buffer to put the MD2 hash into.
      offset - is the offset in the buffer into which to copy the hash.
      len - the length of the buffer.
      Throws:
      DigestException - is thrown when the array is not large enough for the digest.

    • clone

      public Object clone()
      Clones this object.
      Overrides:
      clone in class MessageDigestSpi
      Returns:
      Returns a new MD2 hash object like this one.