Transform(String alg,
    String suffix,
    String mode,
    String pad) 
{
            this.transform = alg + suffix;
            this.suffix = suffix.toUpperCase(Locale.ENGLISH);
            this.mode = mode;
            this.pad = pad;
}

  void setModePadding(CipherSpi spi) throws NoSuchAlgorithmException, NoSuchPaddingException 
{
            if (mode != null) {
                spi.engineSetMode(mode);
            }
            if (pad != null) {
                spi.engineSetPadding(pad);
            }
}

 int supportsMode(Service s) 
{
            return supports(s, ATTR_MODE, mode);
}

 int supportsModePadding(Service s) 
{
            int smode = supportsMode(s);
            if (smode == S_NO) {
                return smode;
            }
            int spad = supportsPadding(s);
            // our constants are defined so that Math.min() is a tri-valued AND
            return Math.min(smode, spad);
}

 int supportsPadding(Service s) 
{
            return supports(s, ATTR_PAD, pad);
}