http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.crypto;


base interface for general purpose Digest based byte derivation functions.

/**
 * base interface for general purpose Digest based byte derivation functions.
 */
public interface DigestDerivationFunction
    extends DerivationFunction
{
    
return the message digest used as the basis for the function

/**
     * return the message digest used as the basis for the function
     */
    public Digest getDigest();
}