final String providerUrl, final String principal, final String credntials) {
        final Hashtable<String, String> env = new Hashtable<>();
        putEnv(env, Context.INITIAL_CONTEXT_FACTORY, initialContextFactory);
        putEnv(env, Context.SECURITY_AUTHENTICATION, securityAuthentication);
        putEnv(env, Context.PROVIDER_URL, providerUrl);

                            String source = line;
                            if ("fess_user.user".equals(configIndex)) {
                                source = source.replace("${fess.index.initial_password}", ComponentUtil.getComponent(FessLoginAssist.class)
                                        .encryptPassword(fessConfig.getIndexUserInitialPassword()));
                            }

    }

    default void setLdapInitialContextFactory(final String value) {
        setSystemProperty(Constants.LDAP_INITIAL_CONTEXT_FACTORY, value);
    }

    default String getLdapInitialContextFactory() {
        return getSystemProperty(Constants.LDAP_INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
    }

    default void setLdapSecurityAuthentication(final String value) {