feat(waf): Phase 2 — edgeguard-waf Binary + SPOE + Coraza Engine — v1.2.67

- cmd/edgeguard-waf/: neues Binary — lädt WAF-Configs aus DB, startet
  SPOE-Agent auf 127.0.0.1:9000, refreshed Configs alle 30s
- internal/waf/engine.go: BuildEngine() — Coraza WAF aus WafConfig bauen
  (SecLang-Direktiven: RuleEngine, PL, CRS-Include, Exclusions, Custom)
- internal/waf/manager.go: Manager — per-Hostname Coraza-Engine-Cache
  (thread-safe, Lazy-Init via Reload(), Port-Strip, IPv6-Brackets)
- internal/waf/spoe.go: SPOEAgent — haproxy-go SPOE-Handler
  (src/method/path/query/ver/host/headers aus HAProxy-Vars,
   Coraza-Transaction, Blocking: txn.waf.status=403 setzen)
- services/waf/waf.go: ListAllWithDomain() — JOIN domains+waf_configs
- go.mod: coraza/v3 v3.7.0 + dropmorepackets/haproxy-go v0.0.8

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

cmd/edgeguard-waf/main.go

@@ -0,0 +1,102 @@
+// Command edgeguard-waf is the per-domain WAF SPOE agent for EdgeGuard.
+// HAProxy connects to it via the SPOE protocol (127.0.0.1:9000).
+// It loads per-domain WAF configs from PostgreSQL and uses Coraza v3
+// with the OWASP Core Rule Set to inspect HTTP requests.
+package main
+
+import (
+	"context"
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"git.netcell-it.de/projekte/edgeguard-native/internal/database"
+	"git.netcell-it.de/projekte/edgeguard-native/internal/models"
+	"git.netcell-it.de/projekte/edgeguard-native/internal/services/waf"
+	intwaf "git.netcell-it.de/projekte/edgeguard-native/internal/waf"
+)
+
+func main() {
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+
+	dsn := database.ConnStringFromEnv()
+	pool, err := database.Open(ctx, dsn)
+	if err != nil {
+		slog.Error("waf: db connect", "error", err)
+		os.Exit(1)
+	}
+	defer pool.Close()
+
+	if err := database.Migrate(ctx, ""); err != nil {
+		slog.Error("waf: migrate", "error", err)
+		os.Exit(1)
+	}
+
+	repo := waf.New(pool)
+
+	crsDir := os.Getenv("EDGEGUARD_WAF_CRS_DIR")
+	if crsDir == "" {
+		crsDir = intwaf.DefaultCRSDir
+	}
+	spoeAddr := os.Getenv("EDGEGUARD_WAF_ADDR")
+	if spoeAddr == "" {
+		spoeAddr = intwaf.DefaultSPOEAddr
+	}
+
+	mgr := intwaf.NewManager(crsDir)
+
+	// Initial load.
+	if err := reload(ctx, repo, mgr); err != nil {
+		slog.Error("waf: initial load", "error", err)
+		os.Exit(1)
+	}
+
+	// Periodic config refresh every 30 seconds.
+	go func() {
+		t := time.NewTicker(30 * time.Second)
+		defer t.Stop()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-t.C:
+				if err := reload(ctx, repo, mgr); err != nil {
+					slog.Warn("waf: reload", "error", err)
+				}
+			}
+		}
+	}()
+
+	agent := intwaf.SPOEAgent{
+		Manager: mgr,
+		Addr:    spoeAddr,
+	}
+
+	slog.Info("waf: SPOE agent starting", "addr", spoeAddr, "crs", crsDir)
+	if err := agent.ListenAndServe(ctx); err != nil && ctx.Err() == nil {
+		slog.Error("waf: SPOE agent stopped", "error", err)
+		os.Exit(1)
+	}
+}
+
+// reload fetches all domain+waf_config pairs from DB and rebuilds engines.
+func reload(ctx context.Context, repo *waf.Repo, mgr *intwaf.Manager) error {
+	configs, err := repo.ListAllWithDomain(ctx)
+	if err != nil {
+		return err
+	}
+	domains := make([]intwaf.DomainConfig, 0, len(configs))
+	for _, c := range configs {
+		domains = append(domains, intwaf.DomainConfig{
+			Hostname: c.Hostname,
+			Config:   c.Config,
+		})
+	}
+	return mgr.Reload(domains)
+}
+
+// Ensure models package is used (imported transitively via services/waf).
+var _ = models.WafConfig{}