}


    /**
     * 
     * @param dialect
     * @param sessionKey
     * @param preauthIntegrity
     * @return derived decryption key
     */
    public static byte[] deriveDecryptionKey ( int dialect, byte[] sessionKey, byte[] preauthIntegrity ) {
        return derive(
            sessionKey,
            dialect == Smb2Constants.SMB2_DIALECT_0311 ? DECLABEL_311 : DECLABEL_300,