客户端tls证书不接受以----- BEGIN TRUSTED CERTIFICATE-开头的证书，并以----- END TRUSTED CERTIFICATE -----结尾

when i use certificate beginning -----BEGIN CERTIFICATE----- and end with -----END CERTIFICATE----- it works fine but when it begins with -----BEGIN TRUSTED CERTIFICATE----- and ends with -----END TRUSTED CERTIFICATE----- it throws error saying x509: certificate signed by unknown authority

the go rest server runs in a linux background

func SetupTLS() {
       certs := x509.NewCertPool()
       if BackendServerCertificateFile == "" {
               if runtime.GOOS == "windows" {
                       BackendServerCertificateFile = filepath.Join(os.Getenv("PROGRAMFILES"), "/conf/ssl/trustedcert/SSCert.pem")
               } else {
                       BackendServerCertificateFile = "/conf/ssl/trustedcert/SSCert.pem"
               }
       }

       pemData, err := ioutil.ReadFile(BackendServerCertificateFile)
       if err != nil {
               event.LogEventError(err, nil)
               return
       }
       certs.AppendCertsFromPEM(pemData)
       var LDAPServerName string
       ldapServer_port := strings.Split(LDAPServer, ":")
       if len(ldapServer_port) >= 1 {
               LDAPServerName = ldapServer_port[0]
       }
       TlsConfig = &tls.Config{ServerName: LDAPServerName, RootCAs: certs}
}

this is the error what i'm getting "x509: certificate signed by unknown authority"