public static String oasisDigest(String password, String nonce) throws Exception{
   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
   String created = sdf.format(new Date());
   System.out.println("Created : " + created);
   System.out.println("Nonce : " + new String(org.apache.commons.codec.binary.Base64.encodeBase64(nonce.getBytes())));
   String toDigest = nonce + created + password;
   MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
   digest.reset();
   digest.update(toDigest.getBytes());
   byte[] hash = digest.digest();
   return new String(org.apache.commons.codec.binary.Base64.encodeBase64(hash));
}