[management, proxy] Add CrowdSec IP reputation integration for reverse proxy (#5722)

management/internals/modules/reverseproxy/service/manager/l4_port_test.go

@@ -81,6 +81,7 @@ func setupL4Test(t *testing.T, customPortsSupported *bool) (*Manager, store.Stor
 	mockCaps := proxy.NewMockManager(ctrl)
 	mockCaps.EXPECT().ClusterSupportsCustomPorts(gomock.Any(), testCluster).Return(customPortsSupported).AnyTimes()
 	mockCaps.EXPECT().ClusterRequireSubdomain(gomock.Any(), testCluster).Return((*bool)(nil)).AnyTimes()
+	mockCaps.EXPECT().ClusterSupportsCrowdSec(gomock.Any(), testCluster).Return((*bool)(nil)).AnyTimes()
 
 	accountMgr := &mock_server.MockAccountManager{
 		StoreEventFunc:         func(_ context.Context, _, _, _ string, _ activity.ActivityDescriber, _ map[string]any) {},

management/internals/modules/reverseproxy/service/service.go

@@ -113,6 +113,7 @@ type AccessRestrictions struct {
 	BlockedCIDRs     []string `json:"blocked_cidrs,omitempty" gorm:"serializer:json"`
 	AllowedCountries []string `json:"allowed_countries,omitempty" gorm:"serializer:json"`
 	BlockedCountries []string `json:"blocked_countries,omitempty" gorm:"serializer:json"`
+	CrowdSecMode     string   `json:"crowdsec_mode,omitempty" gorm:"serializer:json"`
 }
 
 // Copy returns a deep copy of the AccessRestrictions.
@@ -122,6 +123,7 @@ func (r AccessRestrictions) Copy() AccessRestrictions {
 		BlockedCIDRs:     slices.Clone(r.BlockedCIDRs),
 		AllowedCountries: slices.Clone(r.AllowedCountries),
 		BlockedCountries: slices.Clone(r.BlockedCountries),
+		CrowdSecMode:     r.CrowdSecMode,
 	}
 }
 
@@ -555,7 +557,11 @@ func (s *Service) FromAPIRequest(req *api.ServiceRequest, accountID string) erro
 	}
 
 	if req.AccessRestrictions != nil {
-		s.Restrictions = restrictionsFromAPI(req.AccessRestrictions)
+		restrictions, err := restrictionsFromAPI(req.AccessRestrictions)
+		if err != nil {
+			return err
+		}
+		s.Restrictions = restrictions
 	}
 
 	return nil
@@ -631,9 +637,9 @@ func authFromAPI(reqAuth *api.ServiceAuthConfig) AuthConfig {
 	return auth
 }
 
-func restrictionsFromAPI(r *api.AccessRestrictions) AccessRestrictions {
+func restrictionsFromAPI(r *api.AccessRestrictions) (AccessRestrictions, error) {
 	if r == nil {
-		return AccessRestrictions{}
+		return AccessRestrictions{}, nil
 	}
 	var res AccessRestrictions
 	if r.AllowedCidrs != nil {
@@ -648,11 +654,19 @@ func restrictionsFromAPI(r *api.AccessRestrictions) AccessRestrictions {
 	if r.BlockedCountries != nil {
 		res.BlockedCountries = *r.BlockedCountries
 	}
-	return res
+	if r.CrowdsecMode != nil {
+		if !r.CrowdsecMode.Valid() {
+			return AccessRestrictions{}, fmt.Errorf("invalid crowdsec_mode %q", *r.CrowdsecMode)
+		}
+		res.CrowdSecMode = string(*r.CrowdsecMode)
+	}
+	return res, nil
 }
 
 func restrictionsToAPI(r AccessRestrictions) *api.AccessRestrictions {
-	if len(r.AllowedCIDRs) == 0 && len(r.BlockedCIDRs) == 0 && len(r.AllowedCountries) == 0 && len(r.BlockedCountries) == 0 {
+	if len(r.AllowedCIDRs) == 0 && len(r.BlockedCIDRs) == 0 &&
+		len(r.AllowedCountries) == 0 && len(r.BlockedCountries) == 0 &&
+		r.CrowdSecMode == "" {
 		return nil
 	}
 	res := &api.AccessRestrictions{}
@@ -668,11 +682,17 @@ func restrictionsToAPI(r AccessRestrictions) *api.AccessRestrictions {
 	if len(r.BlockedCountries) > 0 {
 		res.BlockedCountries = &r.BlockedCountries
 	}
+	if r.CrowdSecMode != "" {
+		mode := api.AccessRestrictionsCrowdsecMode(r.CrowdSecMode)
+		res.CrowdsecMode = &mode
+	}
 	return res
 }
 
 func restrictionsToProto(r AccessRestrictions) *proto.AccessRestrictions {
-	if len(r.AllowedCIDRs) == 0 && len(r.BlockedCIDRs) == 0 && len(r.AllowedCountries) == 0 && len(r.BlockedCountries) == 0 {
+	if len(r.AllowedCIDRs) == 0 && len(r.BlockedCIDRs) == 0 &&
+		len(r.AllowedCountries) == 0 && len(r.BlockedCountries) == 0 &&
+		r.CrowdSecMode == "" {
 		return nil
 	}
 	return &proto.AccessRestrictions{
@@ -680,6 +700,7 @@ func restrictionsToProto(r AccessRestrictions) *proto.AccessRestrictions {
 		BlockedCidrs:     r.BlockedCIDRs,
 		AllowedCountries: r.AllowedCountries,
 		BlockedCountries: r.BlockedCountries,
+		CrowdsecMode:     r.CrowdSecMode,
 	}
 }
 
@@ -988,7 +1009,20 @@ const (
 
 // validateAccessRestrictions validates and normalizes access restriction
 // entries. Country codes are uppercased in place.
+func validateCrowdSecMode(mode string) error {
+	switch mode {
+	case "", "off", "enforce", "observe":
+		return nil
+	default:
+		return fmt.Errorf("crowdsec_mode %q is invalid", mode)
+	}
+}
+
 func validateAccessRestrictions(r *AccessRestrictions) error {
+	if err := validateCrowdSecMode(r.CrowdSecMode); err != nil {
+		return err
+	}
+
 	if len(r.AllowedCIDRs) > maxCIDREntries {
 		return fmt.Errorf("allowed_cidrs: exceeds maximum of %d entries", maxCIDREntries)
 	}
@@ -1002,35 +1036,37 @@ func validateAccessRestrictions(r *AccessRestrictions) error {
 		return fmt.Errorf("blocked_countries: exceeds maximum of %d entries", maxCountryEntries)
 	}
 
-	for i, raw := range r.AllowedCIDRs {
+	if err := validateCIDRList("allowed_cidrs", r.AllowedCIDRs); err != nil {
+		return err
+	}
+	if err := validateCIDRList("blocked_cidrs", r.BlockedCIDRs); err != nil {
+		return err
+	}
+	if err := normalizeCountryList("allowed_countries", r.AllowedCountries); err != nil {
+		return err
+	}
+	return normalizeCountryList("blocked_countries", r.BlockedCountries)
+}
+
+func validateCIDRList(field string, cidrs []string) error {
+	for i, raw := range cidrs {
 		prefix, err := netip.ParsePrefix(raw)
 		if err != nil {
-			return fmt.Errorf("allowed_cidrs[%d]: %w", i, err)
+			return fmt.Errorf("%s[%d]: %w", field, i, err)
 		}
 		if prefix != prefix.Masked() {
-			return fmt.Errorf("allowed_cidrs[%d]: %q has host bits set, use %s instead", i, raw, prefix.Masked())
+			return fmt.Errorf("%s[%d]: %q has host bits set, use %s instead", field, i, raw, prefix.Masked())
 		}
 	}
-	for i, raw := range r.BlockedCIDRs {
-		prefix, err := netip.ParsePrefix(raw)
-		if err != nil {
-			return fmt.Errorf("blocked_cidrs[%d]: %w", i, err)
-		}
-		if prefix != prefix.Masked() {
-			return fmt.Errorf("blocked_cidrs[%d]: %q has host bits set, use %s instead", i, raw, prefix.Masked())
-		}
-	}
-	for i, code := range r.AllowedCountries {
+	return nil
+}
+
+func normalizeCountryList(field string, codes []string) error {
+	for i, code := range codes {
 		if len(code) != 2 {
-			return fmt.Errorf("allowed_countries[%d]: %q must be a 2-letter ISO 3166-1 alpha-2 code", i, code)
+			return fmt.Errorf("%s[%d]: %q must be a 2-letter ISO 3166-1 alpha-2 code", field, i, code)
 		}
-		r.AllowedCountries[i] = strings.ToUpper(code)
-	}
-	for i, code := range r.BlockedCountries {
-		if len(code) != 2 {
-			return fmt.Errorf("blocked_countries[%d]: %q must be a 2-letter ISO 3166-1 alpha-2 code", i, code)
-		}
-		r.BlockedCountries[i] = strings.ToUpper(code)
+		codes[i] = strings.ToUpper(code)
 	}
 	return nil
 }