feat(waf): Phase 3 — HAProxy SPOE-Integration — v1.2.68

- haproxy.cfg.tpl: filter spoe + deny_status 403 + spoe-edgeguard-waf
  Backend (nur gerendert wenn WAFEnabled=true)
- haproxy.go: WAFEnabled in View; WafRepo.ListEnabled() prüft ob WAF
  aktiv; SPOE-Config-File (coraza-spoe.cfg) wird bei WAFEnabled
  atomar geschrieben; SPOEConfigPath konfigurierbar
- waf/spoe.go: uri statt path+query (HAProxy url-Sample = volle URI)

SPOE-Config definiert:
  - Agent: edgeguard-waf-agent, var-prefix=waf, timeout processing 50ms
  - Message: src, method, uri=url, ver=req.ver, headers=req.hdrs,
             host=req.hdr(host)
  - Backend: spoe-edgeguard-waf → 127.0.0.1:9000

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/haproxy/haproxy.cfg.tpl

@@ -80,6 +80,11 @@ frontend public_https
     bind [::]:443 ssl crt /etc/edgeguard/tls/ alpn h2,http/1.1
     bind quic6@:443 ssl crt /etc/edgeguard/tls/ alpn h3
     {{- end}}
+    {{- if .WAFEnabled}}
+    # WAF: SPOE-Filter — edgeguard-waf inspiziert jeden Request.
+    # filter muss vor allen http-request/http-response-Direktiven stehen.
+    filter spoe engine edgeguard-waf cfg-file /etc/edgeguard/haproxy/coraza-spoe.cfg
+    {{- end}}
 
     # Alt-Svc: signalisiert dass h3 auf demselben Port verfügbar ist.
     # ma=86400 = Browser darf den Hinweis 24h cachen.
@@ -91,6 +96,10 @@ frontend public_https
     # echte Source-IP ohne XFF-Chain-Parsing brauchen.
     http-request set-header X-Forwarded-Proto https
     http-request set-header X-Real-IP %[src]
+    {{- if .WAFEnabled}}
+    # WAF: Request blockieren wenn edgeguard-waf txn.waf.status gesetzt hat.
+    http-request deny deny_status 403 if { var(txn.waf.status) -m found }
+    {{- end}}
 
     {{- if .GlobalMaintenance}}
     # Whole-Box-Maintenance — Settings → Maintenance-Mode aktiv. Dieser
@@ -195,6 +204,16 @@ backend rl_{{$d.ID}}
 {{- end}}
 {{- end}}
 
+{{- if .WAFEnabled}}
+
+# SPOE-Backend für edgeguard-waf (TCP, kein HTTP-Parsing).
+backend spoe-edgeguard-waf
+    mode    tcp
+    timeout connect 100ms
+    timeout server   50ms
+    server  spoe-waf-1 127.0.0.1:9000
+{{- end}}
+
 {{- range $b := .Backends}}
 
 backend eg_backend_{{$b.ID}}

internal/haproxy/haproxy.go

@@ -24,6 +24,7 @@ import (
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/domains"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/routingrules"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/setup"
+	wafsvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/waf"
 )
 
 //go:embed haproxy.cfg.tpl
@@ -64,25 +65,29 @@ type Generator struct {
 	ServersRepo   *backendservers.Repo
 	RoutingRepo   *routingrules.Repo
 	HeadersRepo   *domainheaders.Repo
+	WafRepo       *wafsvc.Repo
 
 	// SetupStore (optional): wenn gesetzt, lesen wir Whole-Box-
 	// Maintenance-Status hieraus und reichen ihn als View.GlobalMaintenance
 	// ans Template weiter.
 	SetupStore *setup.Store
 
-	OutputPath string
-	SkipReload bool
+	OutputPath     string
+	SPOEConfigPath string
+	SkipReload     bool
 }
 
 func New(pool *pgxpool.Pool) *Generator {
 	return &Generator{
-		Pool:         pool,
-		DomainsRepo:  domains.New(pool),
-		BackendsRepo: backends.New(pool),
-		ServersRepo:  backendservers.New(pool),
-		RoutingRepo:  routingrules.New(pool),
-		HeadersRepo:  domainheaders.New(pool),
-		SetupStore:   setup.NewStore(setup.DefaultDir),
+		Pool:           pool,
+		DomainsRepo:    domains.New(pool),
+		BackendsRepo:   backends.New(pool),
+		ServersRepo:    backendservers.New(pool),
+		RoutingRepo:    routingrules.New(pool),
+		HeadersRepo:    domainheaders.New(pool),
+		WafRepo:        wafsvc.New(pool),
+		SetupStore:     setup.NewStore(setup.DefaultDir),
+		SPOEConfigPath: filepath.Join(configgen.EtcEdgeguard, "haproxy", "coraza-spoe.cfg"),
 	}
 }
 
@@ -116,6 +121,17 @@ func (g *Generator) Render(ctx context.Context) error {
 	if err := configgen.AtomicWrite(out, buf.Bytes(), 0o644); err != nil {
 		return fmt.Errorf("haproxy: write: %w", err)
 	}
+	// Write SPOE config whenever WAF is enabled; remove it when disabled
+	// so HAProxy doesn't fail on a missing backend reference.
+	if view.WAFEnabled {
+		spoeOut := g.SPOEConfigPath
+		if spoeOut == "" {
+			spoeOut = filepath.Join(configgen.EtcEdgeguard, "haproxy", "coraza-spoe.cfg")
+		}
+		if err := configgen.AtomicWrite(spoeOut, []byte(spoeCfg), 0o644); err != nil {
+			return fmt.Errorf("haproxy: write spoe config: %w", err)
+		}
+	}
 	if g.SkipReload {
 		return nil
 	}
@@ -125,6 +141,22 @@ func (g *Generator) Render(ctx context.Context) error {
 	return nil
 }
 
+// spoeCfg is the static SPOE configuration for edgeguard-waf.
+// It tells HAProxy which variables to forward and where the agent listens.
+const spoeCfg = `# Generated by edgeguard-api. DO NOT EDIT.
+[spoe-agent edgeguard-waf-agent]
+messages    edgeguard-waf-req
+option      var-prefix waf
+timeout     hello      100ms
+timeout     idle       30s
+timeout     processing 50ms
+use-backend spoe-edgeguard-waf
+
+[spoe-message edgeguard-waf-req]
+args src=src method=method uri=url ver=req.ver headers=req.hdrs host=req.hdr(host)
+event on-frontend-http-request
+`
+
 // View is what the template consumes. Routes per domain are pre-
 // joined here so the template can stay declarative; Servers leben pro
 // BackendView, damit das Template einen `backend …`-Block mit den N
@@ -148,6 +180,11 @@ type View struct {
 	// IPv6Enabled: wenn true fügt das Template zusätzliche
 	// bind-Direktiven für [::]:80, [::]:443 und [::]:3443 hinzu.
 	IPv6Enabled bool
+
+	// WAFEnabled: wenn true wird der SPOE-Filter für edgeguard-waf
+	// in public_https eingebunden und das spoe-Backend gerendert.
+	// Wird gesetzt sobald mindestens eine Domain WAF enabled hat.
+	WAFEnabled bool
 }
 
 type DomainView struct {
@@ -289,6 +326,14 @@ func (g *Generator) loadView(ctx context.Context) (*View, error) {
 		}
 	}
 	v := &View{Domains: domViews, Backends: activeBackends, HTTPDomains: httpDomains}
+
+	// Check whether any domain has WAF enabled.
+	if g.WafRepo != nil {
+		if wafEnabled, err := g.WafRepo.ListEnabled(ctx); err == nil {
+			v.WAFEnabled = len(wafEnabled) > 0
+		}
+	}
+
 	if g.SetupStore != nil {
 		if st, err := g.SetupStore.Load(); err == nil && st != nil {
 			v.GlobalMaintenance = st.MaintenanceMode