return hex.EncodeToString(sum256[:])
	}

	var (
		defaultSha256Cksum string
		v                  []string
		ok                 bool
	)

	// For a presigned request we look at the query param for sha256.
	if isRequestPresignedSignatureV4(r) {
		// X-Amz-Content-Sha256, if not set in presigned requests, checksum
		// will default to 'UNSIGNED-PAYLOAD'.
		defaultSha256Cksum = unsignedPayload

		},
	}
	testKvs := config.KVS{}
	testKvs.Set(Vendor, "keycloak")
	testKvs.Set(KeyCloakRealm, "TestRealm")
	testKvs.Set(KeyCloakAdminURL, "http://keycloak.test/auth/admin")
	cfgGet := func(param string) string {
		return testKvs.Get(param)
	}

	if testConfig.provider != nil {
		t.Errorf("Empty config cannot have any provider!")
	}

	if err := testConfig.initializeProvider(cfgGet, http.DefaultTransport); err != nil {

		return l, err
	}

	getCfgVal := func(cfgParam string) string {
		// As parameters are already validated, we skip checking
		// if the config param was found.
		val, _, _ := s.ResolveConfigParam(config.IdentityLDAPSubSys, config.Default, cfgParam, false)
		return val
	}

	ldapServer := getCfgVal(ServerAddr)
	if ldapServer == "" {
		return l, nil
	}

	return targets, nil
}

func getEnvVarName(subSys, target, param string) string {
	if target == Default {
		return fmt.Sprintf("%s%s%s%s", EnvPrefix, strings.ToUpper(subSys), Default, strings.ToUpper(param))
	}

	return fmt.Sprintf("%s%s%s%s%s%s", EnvPrefix, strings.ToUpper(subSys), Default, strings.ToUpper(param),
		Default, target)
}

	if err != nil {
		errStr = err.Error()
	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceFTP,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  fmt.Sprintf("sftp USER=%s COMMAND=%s PARAM=%s, Source=%s", user, s.Method, s.Filepath, source),
		Duration:  time.Since(startTime),
		Path:      s.Filepath,
		Error:     errStr,
	}
}

func (m *sftpMetrics) log(s *sftp.Request, user string) func(err error) {

// a dry-run that helps skip the nodes that may have hung drives. By default
// restart/stop will ignore the servers that are hung on drives. You can use
// 'force' param to force restart even with hung drives if needed.
func (a adminAPIHandlers) ServiceV2Handler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	vars := mux.Vars(r)
	action := vars["action"]

	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceFTP,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  fmt.Sprintf("ftp USER=%s COMMAND=%s PARAM=%s ISLOGIN=%t, Source=%s", s.Sess.LoginUser(), s.Cmd, s.Param, s.Sess.IsLogin(), source),
		Duration:  time.Since(startTime),
		Path:      objPath,
		Error:     errStr,
	}
}

// Special conditions required by MinIO server are as below
//   - delimiter if set should be equal to '/', otherwise the request is rejected.
//   - marker if set should have a common prefix with 'prefix' param, otherwise
//     the request is rejected.
func validateListObjectsArgs(prefix, marker, delimiter, encodingType string, maxKeys int) APIErrorCode {
	// Max keys cannot be negative.
	if maxKeys < 0 {
		return ErrInvalidMaxKeys

				"X-Amz-Expires", "",
			},
			expectedErrCode: ErrNone,
		},
		// Test case - 2.
		// missing 	"X-Amz-Algorithm" in tdhe query param.
		// contains all query param keys which are necessary for v4 presign request.
		{
			inputQueryKeyVals: []string{
				"X-Amz-Credential", "",
				"X-Amz-Signature", "",
				"X-Amz-Date", "",
				"X-Amz-SignedHeaders", "",
				"X-Amz-Expires", "",
			},