OBTAIN ALGORITHMS BY ADDING A SECURITY PROVIDER TO THE JDK

By default, Java ships with two security providers, SUN version 1.2 and
SunRsaSign version 1.0. The former contains a host of algorithms that
mainly center on Secure Hash Algorithm (SHA), Digital Signature 
Algorithm
(DSA), MD5, and Java Key Store (JKS).

Here's a simple outputting program:

import java.security.Provider;
import java.security.Security;
import java.util.Enumeration;

// List Security Providers and their Algorithms.
public class Providers {

    static public void main(String[ ] args) {
        Provider[ ] ps = Security.getProviders();
        for(int i=0; i<ps.length; i++) {
            System.out.println(""+ps[i]);
            Enumeration enum = ps[i].keys( );
            while(enum.hasMoreElements( )) {
                System.out.println("  "+enum.nextElement( ));
            }
        }
    }
}

which outputs the following:

SUN version 1.2
  Alg.Alias.KeyFactory.1.2.840.10040.4.1
  Alg.Alias.Signature.1.2.840.10040.4.3
  Alg.Alias.KeyPairGenerator.OID.1.2.840.10040.4.1
  Signature.SHA1withDSA KeySize
  Signature.SHA1withDSA ImplementedIn
  ........ more algortihms ....
  SecureRandom.SHA1PRNG ImplementedIn
  Alg.Alias.Signature.SHA-1/DSA
  AlgorithmParameterGenerator.DSA KeySize
SunRsaSign version 1.0
  KeyFactory.RSA
  Signature.MD5withRSA
  Signature.SHA1withRSA
  Signature.MD2withRSA
  KeyPairGenerator.RSA

It's possible to add new security providers, but due to the
import/export laws of encryption technology, obtaining algorithms must 
be done with
care.

Java Cryptography Extensions (JCE) is an example of a provider with
additional algorithms. To install JCE, put the jar or zip file into the
application's classpath. Then go into the Java Runtime Environment 
(JRE)/Java
Development Kit (JDK) installation and change the file named
java.security, which is found in the '$JAVAHOME/lib/security' 
directory. This file
contains various security settings, such as a list of providers.

The following is the list of providers in JDK 1.3:

security.provider.1=sun.security.provider.Sun
security.provider.2=com.sun.rsajca.Provider

To add the international JCE implementation at cryptix.org, insert this
line:

security.provider.3=au.net.aba.crypto.provider.ABAProvider

The next time you run the Providers class, a whole host of new
algorithms will be available under an ABA provider.

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