Java tutorial
import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; public class Main { public static void main(String[] argv) throws Exception { KeyGenerator keyGen = KeyGenerator.getInstance("HmacMD5"); SecretKey key = keyGen.generateKey(); // Generate a key for the HMAC-SHA1 keyed-hashing algorithm keyGen = KeyGenerator.getInstance("HmacSHA1"); key = keyGen.generateKey(); } }