import java.security.Provider;
import java.security.Security;
import java.security.MessageDigest;
import java.util.Iterator;
import java.util.Set;
public class cipher1 {
public static void main(String args[]) throws Exception
{
// Get the Provider List
Provider p[]=Security.getProviders();
// First record of Providers
// Get the Keyset
Set v_set=p[0].keySet();
// Get the Iterator to operate upon
Iterator itr=v_set.iterator();
// Key and Value String Variables
String v_key;
String v_value;
while(itr.hasNext())
{
v_key=(String)itr.next();
v_value=p[0].getProperty(v_key);
System.out.println("Key is "+v_key);
System.out.println("Property Value is "+v_value);
}
// Use the key value as input
// Example :
// Key of type Key is MessageDigest.SHA-512
// Name would be DSA (contents after the dot(.)
System.out.println("SHA-1 Encrypted Code "+encrypt("Ajith","SHA-1"));
System.out.println("MD5 Encrypted Code "+encrypt("Ajith","MD5"));
System.out.println("MD5 Encrypted Code "+encrypt("Ajith","MD5"));
System.out.println("MD2 Encrypted Code "+encrypt("Ajith","MD2"));
System.out.println("SHA-256 Encrypted Code "+encrypt("Ajith","SHA-256"));
System.out.println("SHA-512 Encrypted Code "+encrypt("Ajith","SHA-512"));
}
// This function takes String to be encrypted and encryption alogrithm name
// and returns the encrypted byte Array
public static byte[] encrypt(String v_str,String v_alg_name) throws Exception
{
java.security.MessageDigest d=null;
d=java.security.MessageDigest.getInstance(v_alg_name);
d.reset();
System.out.println("Bytes are "+v_str.getBytes());
d.update(v_str.getBytes());
return d.digest();
}
}
