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

Class MD2

  • All Implemented Interfaces:
    java.lang.Cloneable
    public final class MD2
extends java.security.MessageDigestSpi
implements java.lang.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

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.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 Detail

      • MD2

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

    • Method Detail

      • 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 java.security.MessageDigestSpi

      • engineGetDigestLength

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

      • engineUpdate

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

      • engineDigest

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

      • engineDigest

        protected int engineDigest​(byte[] buf,
                           int offset,
                           int len)
                    throws java.security.DigestException
        Computes and returns the MD2 hash in the buffer provided.
        Overrides:
        engineDigest in class java.security.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:
        java.security.DigestException - is thrown when the array is not large enough for the digest.

      • clone

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