func (l Config) ParsesAsDN(dn string) bool {
	_, err := ldap.ParseDN(dn)
	return err == nil
}

// IsLDAPUserDN determines if the given string could be a user DN from LDAP.
func (l Config) IsLDAPUserDN(user string) bool {
	udn, err := ldap.ParseDN(user)
	if err != nil {
		return false
	}
	for _, baseDN := range l.LDAP.UserDNSearchBaseDistNames {
		if baseDN.Parsed.AncestorOf(udn) {
			return true
		}
	}

	flag.StringVar(&bucketToList, "b", "", "Bucket to list (defaults to ldap username)")
	flag.StringVar(&sessionPolicyFile, "s", "", "File containing session policy to apply to the STS request")
}

func main() {
	flag.Parse()
	if ldapUsername == "" || ldapPassword == "" {
		flag.PrintDefaults()
		return
	}

	// The credentials package in minio-go provides an interface to call the
	// LDAP STS API.

	// Initialize LDAP credentials