Files
nexarch/mail/internal/moduleauth/middleware.go
T
patrickandClaude Sonnet 5 22e0cbf1dd
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INT-18: mail-api mit authentifizierung
Mandant kommt ausschliesslich aus dem Core-Modul-Token (mail/internal/moduleauth,
Kopie des DMS-Verfahrens, eigenstaendig weil separates Go-Modul); der
tenant-Query-Parameter wird nicht mehr gelesen. Jede Route in mailapi und
mailrulesapi verlangt einzeln ein gueltiges Token.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-23 00:41:33 +02:00

77 lines
2.1 KiB
Go

package moduleauth
import (
"context"
"encoding/json"
"errors"
"net/http"
"strings"
)
// Identity ist die aus einem gueltigen Modul-Token gewonnene Identitaet.
// Der Mandant kommt ausschliesslich hieraus, nie aus einem Anfrageparameter
// (INT-18, Befund F-20: Mail-API las den Mandanten bisher aus "?tenant=").
type Identity struct {
UserID string
Tenant string
Role string
}
type identityKey struct{}
func WithIdentity(ctx context.Context, id Identity) context.Context {
return context.WithValue(ctx, identityKey{}, id)
}
func IdentityFrom(ctx context.Context) (Identity, bool) {
id, ok := ctx.Value(identityKey{}).(Identity)
return id, ok
}
type errorResponse struct {
Error string `json:"error"`
}
func writeError(w http.ResponseWriter, status int, message string) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(status)
_ = json.NewEncoder(w).Encode(errorResponse{Error: message})
}
// RequireAuth verlangt ein gueltiges Modul-Token (Bearer) fuer next. Es gibt
// hier bewusst keinen "caller"-Uebergangsmodus wie im DMS: die Mail-API war
// bislang nirgends verdrahtet (kein cmd/-Aufrufer), es gibt also keinen
// bestehenden Client, dessen Kompatibilitaet zu wahren waere.
func RequireAuth(v *Verifier, next http.Handler) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
token, ok := bearer(r)
if !ok {
writeError(w, http.StatusUnauthorized, "nicht angemeldet")
return
}
if v == nil {
writeError(w, http.StatusUnauthorized, "nicht angemeldet")
return
}
claims, err := v.Verify(r.Context(), token)
if err != nil {
if errors.Is(err, ErrInvalidToken) {
writeError(w, http.StatusUnauthorized, "nicht angemeldet")
} else {
writeError(w, http.StatusServiceUnavailable, "identitaetsdienst nicht erreichbar")
}
return
}
id := Identity{UserID: claims.Subject, Tenant: claims.Tenant, Role: claims.Role}
next.ServeHTTP(w, r.WithContext(WithIdentity(r.Context(), id)))
}
}
func bearer(r *http.Request) (string, bool) {
h := r.Header.Get("Authorization")
if len(h) > 7 && strings.EqualFold(h[:7], "bearer ") {
return strings.TrimSpace(h[7:]), true
}
return "", false
}