Compare commits
| Author | SHA1 | Date | |
|---|---|---|---|
 sysopsandClaude Sonnet 5
|
0ce29acf3e | ||
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sysopsandClaude Sonnet 5
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e4856dfc9d | ||
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sysopsandClaude Sonnet 5
|
1a82da211d |
@@ -1,20 +0,0 @@
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package apiserver
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import "context"
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type contextKey int
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const requestContextKey contextKey = iota
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// RequestContext ist der Tenant-/Benutzerkontext, den die Middleware-Kette
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// fuer nachgelagerte Handler bereitstellt (Akzeptanzkriterium 3).
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type RequestContext struct {
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UserID string
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TenantSlug string
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}
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// FromContext liest den von der Middleware gesetzten Kontext.
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func FromContext(ctx context.Context) (RequestContext, bool) {
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rc, ok := ctx.Value(requestContextKey).(RequestContext)
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return rc, ok
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}
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@@ -1,31 +0,0 @@
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// Package apiserver implementiert Core API-01: das REST-Grundgerüst mit
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// URL-Versionierung, einheitlichem Fehlerformat und Middleware-Kette
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// (Auth, Tenant-/Benutzerkontext, Logging).
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package apiserver
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import (
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"encoding/json"
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"net/http"
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)
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// errorBody ist das EINE Fehlerschema fuer alle Endpunkte unter /api/{version}/
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// (Akzeptanzkriterium 2).
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type errorBody struct {
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Error struct {
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Code string `json:"code"`
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Message string `json:"message"`
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} `json:"error"`
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}
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// WriteError schreibt einen Fehler im einheitlichen Schema. code ist ein
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// stabiler, maschinenlesbarer Bezeichner (z.B. "unauthenticated"), message
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// ein fuer Menschen lesbarer deutscher Text.
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func WriteError(w http.ResponseWriter, status int, code, message string) {
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var body errorBody
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body.Error.Code = code
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body.Error.Message = message
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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_ = json.NewEncoder(w).Encode(body)
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}
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@@ -1,56 +0,0 @@
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package apiserver
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import (
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"context"
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"log/slog"
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"net/http"
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"time"
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"gitea.perlbach24.de/scripte/nexarch/internal/auth"
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)
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// authAndTenantContext prueft die Session (wiederverwendet auth.TokenIssuer.Verify
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// aus IAM-02 — keine zweite JWT-Implementierung) und setzt bei Erfolg
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// RequestContext fuer nachgelagerte Handler (Akzeptanzkriterium 3). Anders
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// als auth.RequireAuth (Klartext-Fehler) antwortet diese Middleware im
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// einheitlichen API-01-Fehlerschema (Akzeptanzkriterium 2), damit ALLE
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// Endpunkte unter /api/{version}/ dasselbe Format liefern, auch bei
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// Auth-Fehlern.
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func authAndTenantContext(issuer *auth.TokenIssuer, next http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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cookie, err := r.Cookie(auth.CookieName)
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if err != nil {
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WriteError(w, http.StatusUnauthorized, "unauthenticated", "nicht angemeldet")
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return
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}
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claims, err := issuer.Verify(cookie.Value)
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if err != nil {
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WriteError(w, http.StatusUnauthorized, "unauthenticated", "nicht angemeldet")
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return
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}
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rc := RequestContext{UserID: claims.UserID, TenantSlug: claims.TenantSlug}
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next(w, r.WithContext(context.WithValue(r.Context(), requestContextKey, rc)))
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}
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}
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type statusRecorder struct {
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http.ResponseWriter
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status int
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}
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func (s *statusRecorder) WriteHeader(code int) {
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s.status = code
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s.ResponseWriter.WriteHeader(code)
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}
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// loggingMiddleware protokolliert jede Anfrage strukturiert.
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func loggingMiddleware(next http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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rec := &statusRecorder{ResponseWriter: w, status: http.StatusOK}
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start := time.Now()
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next(rec, r)
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slog.Info("api-anfrage", "method", r.Method, "path", r.URL.Path, "status", rec.status, "dauer", time.Since(start))
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}
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}
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@@ -1,37 +0,0 @@
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package apiserver
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import (
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"net/http"
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"gitea.perlbach24.de/scripte/nexarch/internal/auth"
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)
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// Server registriert versionierte API-Routen (Akzeptanzkriterium 1: unter
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// /api/{version}/...) und verdrahtet fuer jede Route dieselbe Middleware-
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// Kette (Logging -> Auth+Tenantkontext -> Handler).
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type Server struct {
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mux *http.ServeMux
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issuer *auth.TokenIssuer
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}
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func NewServer(issuer *auth.TokenIssuer) *Server {
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return &Server{mux: http.NewServeMux(), issuer: issuer}
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}
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// Handle registriert pattern unter der angegebenen Version, z.B.
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// Handle("v1", "/things", h) -> erreichbar unter /api/v1/things. Verschiedene
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// Versionen sind unabhaengige Pfade — eine neue Version beeintraechtigt
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// bestehende nicht (Akzeptanzkriterium 1 / Pruefung 3).
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func (s *Server) Handle(version, pattern string, h http.HandlerFunc) {
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full := "/api/" + version + pattern
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s.mux.HandleFunc(full, loggingMiddleware(authAndTenantContext(s.issuer, h)))
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}
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// HandleV1 ist die Kurzform fuer die aktuelle Hauptversion.
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func (s *Server) HandleV1(pattern string, h http.HandlerFunc) {
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s.Handle("v1", pattern, h)
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}
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func (s *Server) Handler() http.Handler {
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return s.mux
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}
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@@ -1,149 +0,0 @@
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package apiserver
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import (
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"encoding/json"
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"net/http"
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"net/http/httptest"
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"testing"
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"gitea.perlbach24.de/scripte/nexarch/internal/auth"
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)
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func newTestServer() (*Server, *auth.TokenIssuer) {
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issuer := auth.NewTokenIssuer("test-secret-nur-fuer-tests")
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return NewServer(issuer), issuer
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}
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func withAuthCookie(req *http.Request, token string) *http.Request {
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req.AddCookie(&http.Cookie{Name: auth.CookieName, Value: token})
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return req
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}
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// Akzeptanzkriterium 1: API unter versioniertem Pfad erreichbar.
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func TestHandleV1_RegistersUnderVersionedPath(t *testing.T) {
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srv, issuer := newTestServer()
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srv.HandleV1("/things", func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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})
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token, err := issuer.Issue("user-1", "acme")
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if err != nil {
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t.Fatalf("issue: %v", err)
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}
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req := withAuthCookie(httptest.NewRequest(http.MethodGet, "/api/v1/things", nil), token)
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rec := httptest.NewRecorder()
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srv.Handler().ServeHTTP(rec, req)
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if rec.Code != http.StatusOK {
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t.Fatalf("status = %d, want 200", rec.Code)
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}
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}
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// Akzeptanzkriterium 2 + Pruefung 1 (Stichprobe): mehrere Endpunkte liefern
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// bei fehlerhafter Anfrage dasselbe Fehlerschema.
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func TestErrorFormat_ConsistentAcrossEndpoints(t *testing.T) {
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srv, _ := newTestServer()
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srv.HandleV1("/endpunkt-a", func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(http.StatusOK) })
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srv.HandleV1("/endpunkt-b", func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(http.StatusOK) })
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for _, path := range []string{"/api/v1/endpunkt-a", "/api/v1/endpunkt-b"} {
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req := httptest.NewRequest(http.MethodGet, path, nil) // ohne cookie -> 401
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rec := httptest.NewRecorder()
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srv.Handler().ServeHTTP(rec, req)
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if rec.Code != http.StatusUnauthorized {
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t.Fatalf("%s: status = %d, want 401", path, rec.Code)
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}
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var body errorBody
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if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
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t.Fatalf("%s: fehlerantwort nicht im erwarteten json-schema: %v (body: %s)", path, err, rec.Body.String())
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}
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if body.Error.Code == "" || body.Error.Message == "" {
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t.Fatalf("%s: erwartet nicht-leeren code/message, habe %+v", path, body)
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}
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}
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}
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// Akzeptanzkriterium 3 + Pruefung 2: Middleware-Kette setzt Tenant-/
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// Benutzerkontext zuverlaessig, nachweislich fuer mehrere Endpunkte.
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func TestMiddleware_SetsRequestContextForEveryEndpoint(t *testing.T) {
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srv, issuer := newTestServer()
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var gotA, gotB RequestContext
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srv.HandleV1("/kontext-a", func(w http.ResponseWriter, r *http.Request) {
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gotA, _ = FromContext(r.Context())
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w.WriteHeader(http.StatusOK)
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})
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srv.HandleV1("/kontext-b", func(w http.ResponseWriter, r *http.Request) {
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gotB, _ = FromContext(r.Context())
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w.WriteHeader(http.StatusOK)
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})
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token, err := issuer.Issue("user-42", "tenant-x")
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if err != nil {
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t.Fatalf("issue: %v", err)
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}
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for path, got := range map[string]*RequestContext{"/api/v1/kontext-a": &gotA, "/api/v1/kontext-b": &gotB} {
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req := withAuthCookie(httptest.NewRequest(http.MethodGet, path, nil), token)
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rec := httptest.NewRecorder()
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srv.Handler().ServeHTTP(rec, req)
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if rec.Code != http.StatusOK {
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t.Fatalf("%s: status = %d, want 200", path, rec.Code)
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}
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if got.UserID != "user-42" || got.TenantSlug != "tenant-x" {
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t.Fatalf("%s: request-context unerwartet: %+v", path, *got)
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}
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}
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}
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// Akzeptanzkriterium 1 + Pruefung 3: eine neue v2-Route laesst sich anlegen,
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// ohne v1 zu beeintraechtigen.
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func TestVersioning_V2DoesNotAffectV1(t *testing.T) {
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srv, issuer := newTestServer()
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srv.HandleV1("/things", func(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte("v1-antwort"))
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})
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srv.Handle("v2", "/things", func(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte("v2-antwort"))
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})
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token, err := issuer.Issue("user-1", "acme")
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if err != nil {
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t.Fatalf("issue: %v", err)
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}
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reqV1 := withAuthCookie(httptest.NewRequest(http.MethodGet, "/api/v1/things", nil), token)
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recV1 := httptest.NewRecorder()
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srv.Handler().ServeHTTP(recV1, reqV1)
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if recV1.Body.String() != "v1-antwort" {
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t.Fatalf("v1 antwort = %q, want v1-antwort", recV1.Body.String())
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}
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reqV2 := withAuthCookie(httptest.NewRequest(http.MethodGet, "/api/v2/things", nil), token)
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recV2 := httptest.NewRecorder()
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srv.Handler().ServeHTTP(recV2, reqV2)
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if recV2.Body.String() != "v2-antwort" {
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t.Fatalf("v2 antwort = %q, want v2-antwort", recV2.Body.String())
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}
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// v1 nach dem Anlegen von v2 erneut pruefen — unveraendert.
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reqV1Again := withAuthCookie(httptest.NewRequest(http.MethodGet, "/api/v1/things", nil), token)
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recV1Again := httptest.NewRecorder()
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srv.Handler().ServeHTTP(recV1Again, reqV1Again)
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if recV1Again.Body.String() != "v1-antwort" {
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t.Fatalf("v1 antwort nach v2-anlage = %q, want weiterhin v1-antwort", recV1Again.Body.String())
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}
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}
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|
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func TestAuthAndTenantContext_RejectsInvalidToken(t *testing.T) {
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srv, _ := newTestServer()
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srv.HandleV1("/geschuetzt", func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(http.StatusOK) })
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|
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req := withAuthCookie(httptest.NewRequest(http.MethodGet, "/api/v1/geschuetzt", nil), "kaputtes.token.hier")
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rec := httptest.NewRecorder()
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srv.Handler().ServeHTTP(rec, req)
|
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if rec.Code != http.StatusUnauthorized {
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t.Fatalf("status = %d, want 401", rec.Code)
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}
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}
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@@ -0,0 +1,27 @@
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// Package ldapsync implementiert Core IAM-05: LDAP/Active-Directory-
|
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// Anbindung je Tenant fuer Benutzer-Synchronisation, Login-Delegation und
|
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// Rollenzuordnung aus Gruppen ueber eine explizite Erlaubnis-Matrix.
|
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//
|
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// WICHTIGER HINWEIS: In dieser Umgebung steht kein echter LDAP/AD-Server zur
|
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// Verfuegung (analog zur Archive-Engine bei AUD-05). Client ist deshalb eine
|
||||
// Schnittstelle — die Sync-/Rollenzuordnungs-Logik ist gegen einen Fake in
|
||||
// den Tests vollstaendig geprueft, eine echte Verbindungspruefung gegen
|
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// LDAP/AD steht noch aus.
|
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package ldapsync
|
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|
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// Entry ist ein aus LDAP gelesener Benutzerdatensatz.
|
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type Entry struct {
|
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Email string
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Name string
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Groups []string
|
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Disabled bool
|
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}
|
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|
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// Client abstrahiert die eigentliche LDAP-Verbindung (Bind + Search).
|
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type Client interface {
|
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// Search liefert alle Benutzer, die dem konfigurierten Filter
|
||||
// entsprechen. Ein Fehler bedeutet "Quelle nicht erreichbar oder
|
||||
// fehlerhaft" — Run() bricht dann komplett und folgenlos ab
|
||||
// (Akzeptanzkriterium 2).
|
||||
Search() ([]Entry, error)
|
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}
|
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@@ -0,0 +1,204 @@
|
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package ldapsync
|
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|
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import (
|
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"context"
|
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"errors"
|
||||
"fmt"
|
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"os"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/jackc/pgx/v5/pgxpool"
|
||||
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/user"
|
||||
)
|
||||
|
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type fakeClient struct {
|
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entries []Entry
|
||||
err error
|
||||
}
|
||||
|
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func (f *fakeClient) Search() ([]Entry, error) {
|
||||
if f.err != nil {
|
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return nil, f.err
|
||||
}
|
||||
return f.entries, nil
|
||||
}
|
||||
|
||||
func setupTest(t *testing.T) (*user.TenantUserStore, *rbac.Store, *RoleMappingStore, func()) {
|
||||
t.Helper()
|
||||
adminDSN := os.Getenv("TEST_ADMIN_DSN")
|
||||
if adminDSN == "" {
|
||||
t.Skip("TEST_ADMIN_DSN nicht gesetzt, Integrationstest uebersprungen")
|
||||
}
|
||||
ctx := context.Background()
|
||||
|
||||
pool, err := pgxpool.New(ctx, adminDSN)
|
||||
if err != nil {
|
||||
t.Fatalf("pool: %v", err)
|
||||
}
|
||||
if _, err := pool.Exec(ctx, `
|
||||
CREATE TABLE IF NOT EXISTS users (
|
||||
id UUID PRIMARY KEY DEFAULT gen_random_uuid(), email TEXT NOT NULL UNIQUE, name TEXT NOT NULL,
|
||||
status TEXT NOT NULL DEFAULT 'active', password_hash TEXT NOT NULL DEFAULT '',
|
||||
created_at TIMESTAMPTZ NOT NULL DEFAULT now(), updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS role_assignments (
|
||||
user_id UUID PRIMARY KEY REFERENCES users(id), role TEXT NOT NULL CHECK (role IN ('user','tenant_admin')),
|
||||
granted_by TEXT NOT NULL, granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS role_assignment_history (
|
||||
id UUID PRIMARY KEY DEFAULT gen_random_uuid(), user_id UUID NOT NULL, role TEXT NOT NULL,
|
||||
granted_by TEXT NOT NULL, granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS ldap_group_role_mapping (
|
||||
ldap_group TEXT PRIMARY KEY, role TEXT NOT NULL CHECK (role IN ('user','tenant_admin'))
|
||||
);
|
||||
`); err != nil {
|
||||
t.Fatalf("schema: %v", err)
|
||||
}
|
||||
|
||||
cleanup := func() { pool.Close() }
|
||||
return user.NewTenantUserStore(pool), rbac.NewStore(pool), NewRoleMappingStore(pool), cleanup
|
||||
}
|
||||
|
||||
func uniqueEmail() string {
|
||||
return fmt.Sprintf("ldap-test-%d@example.com", time.Now().UnixNano())
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 3 + Pruefung 1: Rollen-Erlaubnis-Matrix mit Positiv- und
|
||||
// Negativfaellen — keine Privilege-Escalation ueber Gruppenmitgliedschaft.
|
||||
func TestRoleMapping_PositiveAndNegativeCases(t *testing.T) {
|
||||
_, _, mappings, cleanup := setupTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
if err := mappings.SetMapping(ctx, "cn=IT-Admins,ou=groups,dc=example,dc=com", rbac.RoleTenantAdmin); err != nil {
|
||||
t.Fatalf("set mapping: %v", err)
|
||||
}
|
||||
|
||||
// Positivfall: gemappte Gruppe liefert die konfigurierte Rolle.
|
||||
role, ok, err := mappings.HighestRoleFor(ctx, []string{"cn=IT-Admins,ou=groups,dc=example,dc=com"})
|
||||
if err != nil {
|
||||
t.Fatalf("highest role: %v", err)
|
||||
}
|
||||
if !ok || role != rbac.RoleTenantAdmin {
|
||||
t.Fatalf("erwartet tenant_admin, habe ok=%v role=%q", ok, role)
|
||||
}
|
||||
|
||||
// Negativfall 1: unbekannte Gruppe vergibt keine Rolle.
|
||||
_, ok, err = mappings.HighestRoleFor(ctx, []string{"cn=Praktikanten,ou=groups,dc=example,dc=com"})
|
||||
if err != nil {
|
||||
t.Fatalf("highest role (unbekannt): %v", err)
|
||||
}
|
||||
if ok {
|
||||
t.Fatal("erwartet KEINE rolle fuer nicht gemappte gruppe")
|
||||
}
|
||||
|
||||
// Negativfall 2 (Privilege-Escalation-Versuch): eine Gruppe, die zufaellig
|
||||
// wie eine interne Rolle heisst, aber NIE explizit gemappt wurde, darf
|
||||
// keine Rolle vergeben.
|
||||
_, ok, err = mappings.HighestRoleFor(ctx, []string{"tenant_admin", "superadmin"})
|
||||
if err != nil {
|
||||
t.Fatalf("highest role (namens-trick): %v", err)
|
||||
}
|
||||
if ok {
|
||||
t.Fatal("erwartet KEINE privilege-escalation ueber gruppennamen, die wie rollen aussehen")
|
||||
}
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 1: Synchronisationslauf legt Benutzer an.
|
||||
func TestSyncer_CreatesUsers(t *testing.T) {
|
||||
users, roles, mappings, cleanup := setupTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
email := uniqueEmail()
|
||||
client := &fakeClient{entries: []Entry{{Email: email, Name: "LDAP Nutzer"}}}
|
||||
syncer := NewSyncer(client, users, roles, mappings)
|
||||
|
||||
result, err := syncer.Run(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("run: %v", err)
|
||||
}
|
||||
if result.Created != 1 {
|
||||
t.Fatalf("erwartet 1 angelegten benutzer, habe %d", result.Created)
|
||||
}
|
||||
|
||||
if _, err := users.GetByEmailForAuth(ctx, email); err != nil {
|
||||
t.Fatalf("benutzer sollte existieren: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 2 + Pruefung 2: fehlerhafte/nicht erreichbare LDAP-
|
||||
// Quelle bricht kontrolliert ab, ohne bestehende Konten zu beschaedigen.
|
||||
func TestSyncer_AbortsCleanlyOnSourceError(t *testing.T) {
|
||||
users, roles, mappings, cleanup := setupTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
// Ein bereits bestehendes Konto, das UNBERUEHRT bleiben muss.
|
||||
existingEmail := uniqueEmail()
|
||||
existing, err := users.Create(ctx, existingEmail, "Bestehender Nutzer")
|
||||
if err != nil {
|
||||
t.Fatalf("create existing: %v", err)
|
||||
}
|
||||
|
||||
client := &fakeClient{err: errors.New("ldap-server nicht erreichbar (simuliert)")}
|
||||
syncer := NewSyncer(client, users, roles, mappings)
|
||||
|
||||
if _, err := syncer.Run(ctx); err == nil {
|
||||
t.Fatal("erwartet fehler bei nicht erreichbarer ldap-quelle")
|
||||
}
|
||||
|
||||
// Bestehendes Konto unveraendert (noch aktiv, keine geloeschten/neuen Zeilen).
|
||||
got, err := users.Get(ctx, existing.ID)
|
||||
if err != nil {
|
||||
t.Fatalf("bestehendes konto sollte weiterhin existieren: %v", err)
|
||||
}
|
||||
if got.Status != user.StatusActive {
|
||||
t.Fatalf("bestehendes konto sollte unveraendert aktiv sein, ist %q", got.Status)
|
||||
}
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 3 + Pruefung 3: Deaktivierung in LDAP wird bei
|
||||
// naechster Synchronisation korrekt uebernommen.
|
||||
func TestSyncer_AppliesDeactivationOnNextRun(t *testing.T) {
|
||||
users, roles, mappings, cleanup := setupTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
email := uniqueEmail()
|
||||
client := &fakeClient{entries: []Entry{{Email: email, Name: "Wird Deaktiviert"}}}
|
||||
syncer := NewSyncer(client, users, roles, mappings)
|
||||
|
||||
if _, err := syncer.Run(ctx); err != nil {
|
||||
t.Fatalf("erster lauf: %v", err)
|
||||
}
|
||||
u, err := users.GetByEmailForAuth(ctx, email)
|
||||
if err != nil {
|
||||
t.Fatalf("benutzer nach erstem lauf: %v", err)
|
||||
}
|
||||
if u.User.Status != user.StatusActive {
|
||||
t.Fatalf("erwartet aktiv nach erstem lauf, habe %q", u.User.Status)
|
||||
}
|
||||
|
||||
// Zweiter Lauf: derselbe Benutzer ist jetzt in LDAP deaktiviert.
|
||||
client.entries[0].Disabled = true
|
||||
result, err := syncer.Run(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("zweiter lauf: %v", err)
|
||||
}
|
||||
if result.Deactivated != 1 {
|
||||
t.Fatalf("erwartet 1 deaktivierung, habe %d", result.Deactivated)
|
||||
}
|
||||
|
||||
u, err = users.GetByEmailForAuth(ctx, email)
|
||||
if err != nil {
|
||||
t.Fatalf("benutzer nach zweitem lauf: %v", err)
|
||||
}
|
||||
if u.User.Status != user.StatusInactive {
|
||||
t.Fatalf("erwartet inaktiv nach deaktivierung in ldap, habe %q", u.User.Status)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,79 @@
|
||||
package ldapsync
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
|
||||
"github.com/jackc/pgx/v5"
|
||||
"github.com/jackc/pgx/v5/pgxpool"
|
||||
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
|
||||
)
|
||||
|
||||
// RoleMappingStore verwaltet die Erlaubnis-Matrix LDAP-Gruppe -> Rolle
|
||||
// (Akzeptanzkriterium 3). Nur explizit gemappte Gruppen vergeben eine Rolle
|
||||
// — der Schutz gegen Privilege-Escalation ist strukturell: es gibt keinen
|
||||
// Code-Pfad, der eine unbekannte Gruppe irgendeiner Rolle zuordnet.
|
||||
type RoleMappingStore struct {
|
||||
pool *pgxpool.Pool
|
||||
}
|
||||
|
||||
func NewRoleMappingStore(pool *pgxpool.Pool) *RoleMappingStore {
|
||||
return &RoleMappingStore{pool: pool}
|
||||
}
|
||||
|
||||
// SetMapping ordnet eine LDAP-Gruppe genau einer NEXARCH-Rolle zu. Nur
|
||||
// 'user'/'tenant_admin' sind zuweisbar (dieselbe Matrix wie RBAC-01/03) —
|
||||
// 'superadmin' bleibt mandantenuebergreifend und nie ueber LDAP erreichbar.
|
||||
func (s *RoleMappingStore) SetMapping(ctx context.Context, ldapGroup string, role rbac.Role) error {
|
||||
if role != rbac.RoleUser && role != rbac.RoleTenantAdmin {
|
||||
return fmt.Errorf("ldapsync: rolle %q ist ueber ldap nicht zuweisbar", role)
|
||||
}
|
||||
_, err := s.pool.Exec(ctx, `
|
||||
INSERT INTO ldap_group_role_mapping (ldap_group, role) VALUES ($1, $2)
|
||||
ON CONFLICT (ldap_group) DO UPDATE SET role = $2
|
||||
`, ldapGroup, string(role))
|
||||
if err != nil {
|
||||
return fmt.Errorf("gruppenzuordnung speichern: %w", err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// roleFor liefert die einer LDAP-Gruppe zugeordnete Rolle, sofern konfiguriert.
|
||||
func (s *RoleMappingStore) roleFor(ctx context.Context, ldapGroup string) (rbac.Role, bool, error) {
|
||||
var role string
|
||||
err := s.pool.QueryRow(ctx, `SELECT role FROM ldap_group_role_mapping WHERE ldap_group = $1`, ldapGroup).Scan(&role)
|
||||
if err != nil {
|
||||
if errors.Is(err, pgx.ErrNoRows) {
|
||||
return "", false, nil
|
||||
}
|
||||
return "", false, fmt.Errorf("gruppenzuordnung lesen: %w", err)
|
||||
}
|
||||
return rbac.Role(role), true, nil
|
||||
}
|
||||
|
||||
// HighestRoleFor bestimmt aus einer Liste von LDAP-Gruppen die hoechste
|
||||
// zugeordnete Rolle (tenant_admin > user). Gruppen ohne Eintrag in der
|
||||
// Matrix tragen NICHTS bei — auch nicht, wenn ihr Name zufaellig wie eine
|
||||
// interne Rolle aussieht (Akzeptanzkriterium 3 / Pruefung 1: keine
|
||||
// Privilege-Escalation ueber Gruppenmitgliedschaft).
|
||||
func (s *RoleMappingStore) HighestRoleFor(ctx context.Context, ldapGroups []string) (rbac.Role, bool, error) {
|
||||
var best rbac.Role
|
||||
found := false
|
||||
|
||||
for _, g := range ldapGroups {
|
||||
role, ok, err := s.roleFor(ctx, g)
|
||||
if err != nil {
|
||||
return "", false, err
|
||||
}
|
||||
if !ok {
|
||||
continue
|
||||
}
|
||||
if !found || role == rbac.RoleTenantAdmin {
|
||||
best = role
|
||||
found = true
|
||||
}
|
||||
}
|
||||
return best, found, nil
|
||||
}
|
||||
@@ -0,0 +1,93 @@
|
||||
package ldapsync
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/user"
|
||||
)
|
||||
|
||||
// SyncResult fasst das Ergebnis eines Synchronisationslaufs zusammen.
|
||||
type SyncResult struct {
|
||||
Created int
|
||||
Updated int
|
||||
Deactivated int
|
||||
Failed []string // Email-Adressen, bei denen die Verarbeitung fehlschlug
|
||||
}
|
||||
|
||||
// Syncer fuehrt die Benutzer-/Rollen-Synchronisation aus LDAP aus.
|
||||
type Syncer struct {
|
||||
client Client
|
||||
users *user.TenantUserStore
|
||||
roles *rbac.Store
|
||||
mappings *RoleMappingStore
|
||||
}
|
||||
|
||||
func NewSyncer(client Client, users *user.TenantUserStore, roles *rbac.Store, mappings *RoleMappingStore) *Syncer {
|
||||
return &Syncer{client: client, users: users, roles: roles, mappings: mappings}
|
||||
}
|
||||
|
||||
// Run synchronisiert Benutzer aus LDAP (Akzeptanzkriterium 1). Ist die
|
||||
// LDAP-Quelle nicht erreichbar/fehlerhaft, wird SOFORT und OHNE jede
|
||||
// Aenderung an bestehenden Konten abgebrochen (Akzeptanzkriterium 2 /
|
||||
// Pruefung 2) — Search() wird als allererstes aufgerufen, bevor irgendein
|
||||
// Schreibzugriff stattfindet.
|
||||
func (s *Syncer) Run(ctx context.Context) (SyncResult, error) {
|
||||
entries, err := s.client.Search()
|
||||
if err != nil {
|
||||
return SyncResult{}, fmt.Errorf("ldap-quelle nicht erreichbar, synchronisation abgebrochen: %w", err)
|
||||
}
|
||||
|
||||
var result SyncResult
|
||||
for _, entry := range entries {
|
||||
if err := s.syncOne(ctx, entry, &result); err != nil {
|
||||
// Ein fehlerhafter Einzeleintrag isoliert sich selbst — er
|
||||
// beschaedigt weder bereits verarbeitete noch nachfolgende
|
||||
// Konten (Akzeptanzkriterium 2).
|
||||
result.Failed = append(result.Failed, entry.Email)
|
||||
}
|
||||
}
|
||||
return result, nil
|
||||
}
|
||||
|
||||
func (s *Syncer) syncOne(ctx context.Context, entry Entry, result *SyncResult) error {
|
||||
existing, err := s.users.GetByEmailForAuth(ctx, entry.Email)
|
||||
isNew := errors.Is(err, user.ErrNotFound)
|
||||
if err != nil && !isNew {
|
||||
return err
|
||||
}
|
||||
|
||||
var userID string
|
||||
if isNew {
|
||||
created, err := s.users.Create(ctx, entry.Email, entry.Name)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
userID = created.ID
|
||||
result.Created++
|
||||
} else {
|
||||
userID = existing.User.ID
|
||||
result.Updated++
|
||||
}
|
||||
|
||||
// Deaktivierung in LDAP wird uebernommen (Akzeptanzkriterium 3 / Pruefung 3).
|
||||
if entry.Disabled {
|
||||
if _, err := s.users.Deactivate(ctx, userID); err != nil {
|
||||
return err
|
||||
}
|
||||
result.Deactivated++
|
||||
}
|
||||
|
||||
role, ok, err := s.mappings.HighestRoleFor(ctx, entry.Groups)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if ok {
|
||||
if _, err := s.roles.Assign(ctx, userID, role, "ldap-sync"); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
@@ -0,0 +1,78 @@
|
||||
// Package oidc implementiert Core IAM-06: SSO-Anmeldung ueber OpenID
|
||||
// Connect gegen externe Identity-Provider.
|
||||
//
|
||||
// WICHTIGER HINWEIS: In dieser Umgebung ist kein registrierter externer
|
||||
// OIDC-Provider (Client-ID/Secret bei Google/Okta/Azure AD o.ae.) verfuegbar,
|
||||
// gegen den ein echter Authorization-Code-Redirect-Flow end-to-end
|
||||
// durchgefuehrt werden koennte (analog AUD-05/Archive, IAM-05/LDAP). ANDERS
|
||||
// als bei LDAP/Archive ist die eigentliche Token-VALIDIERUNG (JWKS-
|
||||
// Signaturpruefung, Ablauf, Claims, Nonce/State) aber ein rein
|
||||
// kryptographischer Vorgang ohne Netzwerkabhaengigkeit zur Testzeit — die
|
||||
// Tests unten erzeugen ein eigenes RSA-Schluesselpaar, signieren ein
|
||||
// ID-Token selbst und pruefen es exakt so, wie es ein echter Provider
|
||||
// liefern wuerde. Nur der Redirect zu einem echten externen Provider bleibt
|
||||
// ungeprueft.
|
||||
package oidc
|
||||
|
||||
import (
|
||||
"crypto/rsa"
|
||||
"encoding/base64"
|
||||
"encoding/binary"
|
||||
"encoding/json"
|
||||
"errors"
|
||||
"fmt"
|
||||
"math/big"
|
||||
)
|
||||
|
||||
type jwk struct {
|
||||
Kid string `json:"kid"`
|
||||
Kty string `json:"kty"`
|
||||
N string `json:"n"`
|
||||
E string `json:"e"`
|
||||
}
|
||||
|
||||
type jwkSet struct {
|
||||
Keys []jwk `json:"keys"`
|
||||
}
|
||||
|
||||
var ErrUnsupportedKeyType = errors.New("oidc: nicht unterstuetzter jwk-schluesseltyp")
|
||||
|
||||
// ParseJWKS dekodiert eine JWKS-Antwort (RFC 7517) in kid -> RSA-Public-Key.
|
||||
// Nur RSA-Schluessel (kty=RSA, Standard bei allen gaengigen OIDC-Providern
|
||||
// fuer ID-Tokens) werden unterstuetzt.
|
||||
func ParseJWKS(data []byte) (map[string]*rsa.PublicKey, error) {
|
||||
var set jwkSet
|
||||
if err := json.Unmarshal(data, &set); err != nil {
|
||||
return nil, fmt.Errorf("jwks parsen: %w", err)
|
||||
}
|
||||
|
||||
out := make(map[string]*rsa.PublicKey, len(set.Keys))
|
||||
for _, k := range set.Keys {
|
||||
if k.Kty != "RSA" {
|
||||
continue
|
||||
}
|
||||
pub, err := decodeRSAKey(k)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("schluessel %q dekodieren: %w", k.Kid, err)
|
||||
}
|
||||
out[k.Kid] = pub
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
func decodeRSAKey(k jwk) (*rsa.PublicKey, error) {
|
||||
nBytes, err := base64.RawURLEncoding.DecodeString(k.N)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("modulus dekodieren: %w", err)
|
||||
}
|
||||
eBytes, err := base64.RawURLEncoding.DecodeString(k.E)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("exponent dekodieren: %w", err)
|
||||
}
|
||||
|
||||
eBuf := make([]byte, 8)
|
||||
copy(eBuf[8-len(eBytes):], eBytes)
|
||||
e := int(binary.BigEndian.Uint64(eBuf))
|
||||
|
||||
return &rsa.PublicKey{N: new(big.Int).SetBytes(nBytes), E: e}, nil
|
||||
}
|
||||
@@ -0,0 +1,69 @@
|
||||
package oidc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/auth"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/ldapsync"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/user"
|
||||
)
|
||||
|
||||
// CompleteOIDCLogin verifiziert das ID-Token (Signatur, Ablauf, Aussteller,
|
||||
// Nonce — Akzeptanzkriterium 3), loest den State einmalig ein
|
||||
// (Akzeptanzkriterium/Pruefung 3), legt bei Bedarf einen lokalen Benutzer an
|
||||
// und mapped Rollen aus den OIDC-Claims ueber DIESELBE Erlaubnis-Matrix wie
|
||||
// IAM-05/LDAP (ldapsync.RoleMappingStore — kein zweiter, paralleler
|
||||
// Mapping-Mechanismus, Akzeptanzkriterium 2). Bei Erfolg wird ein normales
|
||||
// IAM-02-Sitzungs-Token ausgestellt.
|
||||
func CompleteOIDCLogin(
|
||||
ctx context.Context,
|
||||
verifier *Verifier,
|
||||
states *StateStore,
|
||||
users *user.TenantUserStore,
|
||||
roles *rbac.Store,
|
||||
roleMapping *ldapsync.RoleMappingStore,
|
||||
issuer *auth.TokenIssuer,
|
||||
tenantSlug, state, idToken string,
|
||||
) (token string, err error) {
|
||||
nonce, err := states.Consume(ctx, state)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
claims, err := verifier.VerifyWithNonce(idToken, nonce)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
if claims.Email == "" {
|
||||
return "", fmt.Errorf("%w: id-token ohne e-mail-claim", ErrInvalidToken)
|
||||
}
|
||||
|
||||
u, err := findOrCreateUser(ctx, users, claims.Email)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
if role, ok, err := roleMapping.HighestRoleFor(ctx, claims.Roles); err != nil {
|
||||
return "", err
|
||||
} else if ok {
|
||||
if _, err := roles.Assign(ctx, u.ID, role, "oidc-sso"); err != nil {
|
||||
return "", err
|
||||
}
|
||||
}
|
||||
|
||||
return issuer.Issue(u.ID, tenantSlug)
|
||||
}
|
||||
|
||||
func findOrCreateUser(ctx context.Context, users *user.TenantUserStore, email string) (user.User, error) {
|
||||
creds, err := users.GetByEmailForAuth(ctx, email)
|
||||
if err == nil {
|
||||
return creds.User, nil
|
||||
}
|
||||
if !errors.Is(err, user.ErrNotFound) {
|
||||
return user.User{}, err
|
||||
}
|
||||
return users.Create(ctx, email, email)
|
||||
}
|
||||
@@ -0,0 +1,172 @@
|
||||
package oidc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/rsa"
|
||||
"fmt"
|
||||
"os"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/jackc/pgx/v5/pgxpool"
|
||||
"github.com/golang-jwt/jwt/v5"
|
||||
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/auth"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/ldapsync"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/user"
|
||||
)
|
||||
|
||||
func setupLoginTest(t *testing.T) (*pgxpool.Pool, func()) {
|
||||
t.Helper()
|
||||
adminDSN := os.Getenv("TEST_ADMIN_DSN")
|
||||
if adminDSN == "" {
|
||||
t.Skip("TEST_ADMIN_DSN nicht gesetzt, Integrationstest uebersprungen")
|
||||
}
|
||||
ctx := context.Background()
|
||||
|
||||
pool, err := pgxpool.New(ctx, adminDSN)
|
||||
if err != nil {
|
||||
t.Fatalf("pool: %v", err)
|
||||
}
|
||||
if _, err := pool.Exec(ctx, `
|
||||
CREATE TABLE IF NOT EXISTS users (
|
||||
id UUID PRIMARY KEY DEFAULT gen_random_uuid(), email TEXT NOT NULL UNIQUE, name TEXT NOT NULL,
|
||||
status TEXT NOT NULL DEFAULT 'active', password_hash TEXT NOT NULL DEFAULT '',
|
||||
created_at TIMESTAMPTZ NOT NULL DEFAULT now(), updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS role_assignments (
|
||||
user_id UUID PRIMARY KEY REFERENCES users(id), role TEXT NOT NULL CHECK (role IN ('user','tenant_admin')),
|
||||
granted_by TEXT NOT NULL, granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS role_assignment_history (
|
||||
id UUID PRIMARY KEY DEFAULT gen_random_uuid(), user_id UUID NOT NULL, role TEXT NOT NULL,
|
||||
granted_by TEXT NOT NULL, granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS ldap_group_role_mapping (
|
||||
ldap_group TEXT PRIMARY KEY, role TEXT NOT NULL CHECK (role IN ('user','tenant_admin'))
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS oidc_states (
|
||||
state TEXT PRIMARY KEY, nonce TEXT NOT NULL, expires_at TIMESTAMPTZ NOT NULL,
|
||||
used_at TIMESTAMPTZ, created_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
`); err != nil {
|
||||
t.Fatalf("schema: %v", err)
|
||||
}
|
||||
|
||||
cleanup := func() { pool.Close() }
|
||||
return pool, cleanup
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 1 + 3: End-to-End-Login gegen ein (selbst signiertes,
|
||||
// aber protokollkorrektes) ID-Token — Signatur, Nonce, State, Rollen-Mapping,
|
||||
// Sitzungs-Token-Ausstellung.
|
||||
func TestCompleteOIDCLogin_EndToEnd(t *testing.T) {
|
||||
pool, cleanup := setupLoginTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
key := generateTestKey(t)
|
||||
verifier := NewVerifier(map[string]*rsa.PublicKey{"kid-1": &key.PublicKey}, "https://idp.example.com")
|
||||
states := NewStateStore(pool)
|
||||
users := user.NewTenantUserStore(pool)
|
||||
roles := rbac.NewStore(pool)
|
||||
roleMapping := ldapsync.NewRoleMappingStore(pool)
|
||||
issuer := auth.NewTokenIssuer("test-secret-nur-fuer-tests")
|
||||
|
||||
if err := roleMapping.SetMapping(ctx, "sso-admins", rbac.RoleTenantAdmin); err != nil {
|
||||
t.Fatalf("set mapping: %v", err)
|
||||
}
|
||||
|
||||
state, nonce, err := states.Generate(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("generate state: %v", err)
|
||||
}
|
||||
|
||||
email := fmt.Sprintf("oidc-test-%d@example.com", time.Now().UnixNano())
|
||||
claims := Claims{
|
||||
Subject: "idp-subject-123",
|
||||
Email: email,
|
||||
Nonce: nonce,
|
||||
Roles: []string{"sso-admins"},
|
||||
RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://idp.example.com",
|
||||
ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
|
||||
},
|
||||
}
|
||||
idToken := signTestToken(t, key, "kid-1", claims)
|
||||
|
||||
token, err := CompleteOIDCLogin(ctx, verifier, states, users, roles, roleMapping, issuer, "acme", state, idToken)
|
||||
if err != nil {
|
||||
t.Fatalf("complete oidc login: %v", err)
|
||||
}
|
||||
if token == "" {
|
||||
t.Fatal("erwartet nicht-leeres sitzungs-token")
|
||||
}
|
||||
|
||||
assignment, err := roles.Get(ctx, mustGetUserID(t, ctx, users, email))
|
||||
if err != nil {
|
||||
t.Fatalf("rollenzuweisung lesen: %v", err)
|
||||
}
|
||||
if assignment.Role != rbac.RoleTenantAdmin {
|
||||
t.Fatalf("erwartet tenant_admin aus sso-admins-mapping, habe %q", assignment.Role)
|
||||
}
|
||||
|
||||
// Replay desselben state schlaegt fehl.
|
||||
if _, err := CompleteOIDCLogin(ctx, verifier, states, users, roles, roleMapping, issuer, "acme", state, idToken); err == nil {
|
||||
t.Fatal("erwartet fehler bei wiederverwendetem state (replay)")
|
||||
}
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 2 + Pruefung 1: keine Privilege-Escalation ueber
|
||||
// manipulierte/unbekannte Rollen-Claims.
|
||||
func TestCompleteOIDCLogin_UnmappedRoleGrantsNothing(t *testing.T) {
|
||||
pool, cleanup := setupLoginTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
key := generateTestKey(t)
|
||||
verifier := NewVerifier(map[string]*rsa.PublicKey{"kid-1": &key.PublicKey}, "https://idp.example.com")
|
||||
states := NewStateStore(pool)
|
||||
users := user.NewTenantUserStore(pool)
|
||||
roles := rbac.NewStore(pool)
|
||||
roleMapping := ldapsync.NewRoleMappingStore(pool)
|
||||
issuer := auth.NewTokenIssuer("test-secret-nur-fuer-tests")
|
||||
|
||||
state, nonce, err := states.Generate(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("generate state: %v", err)
|
||||
}
|
||||
|
||||
email := fmt.Sprintf("oidc-test-%d@example.com", time.Now().UnixNano())
|
||||
claims := Claims{
|
||||
Email: email,
|
||||
Nonce: nonce,
|
||||
// Versuch, sich ueber einen manipulierten Rollen-Claim
|
||||
// hochzustufen — diese Gruppen wurden NIE gemappt.
|
||||
Roles: []string{"tenant_admin", "superadmin"},
|
||||
RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://idp.example.com",
|
||||
ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
|
||||
},
|
||||
}
|
||||
idToken := signTestToken(t, key, "kid-1", claims)
|
||||
|
||||
if _, err := CompleteOIDCLogin(ctx, verifier, states, users, roles, roleMapping, issuer, "acme", state, idToken); err != nil {
|
||||
t.Fatalf("complete oidc login: %v", err)
|
||||
}
|
||||
|
||||
userID := mustGetUserID(t, ctx, users, email)
|
||||
if _, err := roles.Get(ctx, userID); err == nil {
|
||||
t.Fatal("erwartet KEINE rollenzuweisung fuer nicht gemappte claims (privilege-escalation-versuch)")
|
||||
}
|
||||
}
|
||||
|
||||
func mustGetUserID(t *testing.T, ctx context.Context, users *user.TenantUserStore, email string) string {
|
||||
t.Helper()
|
||||
creds, err := users.GetByEmailForAuth(ctx, email)
|
||||
if err != nil {
|
||||
t.Fatalf("get user by email: %v", err)
|
||||
}
|
||||
return creds.User.ID
|
||||
}
|
||||
@@ -0,0 +1,76 @@
|
||||
package oidc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/rand"
|
||||
"encoding/hex"
|
||||
"errors"
|
||||
"fmt"
|
||||
"time"
|
||||
|
||||
"github.com/jackc/pgx/v5"
|
||||
"github.com/jackc/pgx/v5/pgxpool"
|
||||
)
|
||||
|
||||
var ErrStateInvalid = errors.New("oidc: state ungueltig, bereits verwendet oder abgelaufen")
|
||||
|
||||
// DefaultStateTTL begrenzt, wie lange ein ausgestellter State/Nonce fuer den
|
||||
// Redirect-Umweg zum Identity-Provider gueltig bleibt.
|
||||
const DefaultStateTTL = 10 * time.Minute
|
||||
|
||||
type StateStore struct {
|
||||
pool *pgxpool.Pool
|
||||
}
|
||||
|
||||
func NewStateStore(pool *pgxpool.Pool) *StateStore {
|
||||
return &StateStore{pool: pool}
|
||||
}
|
||||
|
||||
// Generate stellt state+nonce fuer einen neuen Login-Redirect aus. state
|
||||
// wird als OAuth2-"state"-Parameter mitgeschickt (CSRF-Schutz), nonce
|
||||
// erscheint spaeter im ID-Token und muss exakt uebereinstimmen (Replay-Schutz).
|
||||
func (s *StateStore) Generate(ctx context.Context) (state, nonce string, err error) {
|
||||
state, err = randomValue()
|
||||
if err != nil {
|
||||
return "", "", err
|
||||
}
|
||||
nonce, err = randomValue()
|
||||
if err != nil {
|
||||
return "", "", err
|
||||
}
|
||||
|
||||
_, err = s.pool.Exec(ctx, `
|
||||
INSERT INTO oidc_states (state, nonce, expires_at) VALUES ($1, $2, $3)
|
||||
`, state, nonce, time.Now().Add(DefaultStateTTL))
|
||||
if err != nil {
|
||||
return "", "", fmt.Errorf("state speichern: %w", err)
|
||||
}
|
||||
return state, nonce, nil
|
||||
}
|
||||
|
||||
// Consume loest einen State EINMALIG ein (Akzeptanzkriterium/Pruefung 3:
|
||||
// Replay-Schutz) — atomar ueber WHERE used_at IS NULL, analog IAM-03/IAM-09.
|
||||
// Ein zweiter Callback mit demselben state (z.B. durch einen Angreifer, der
|
||||
// die Redirect-URL abgefangen hat) schlaegt fehl.
|
||||
func (s *StateStore) Consume(ctx context.Context, state string) (nonce string, err error) {
|
||||
err = s.pool.QueryRow(ctx, `
|
||||
UPDATE oidc_states SET used_at = now()
|
||||
WHERE state = $1 AND used_at IS NULL AND expires_at > now()
|
||||
RETURNING nonce
|
||||
`, state).Scan(&nonce)
|
||||
if err != nil {
|
||||
if errors.Is(err, pgx.ErrNoRows) {
|
||||
return "", ErrStateInvalid
|
||||
}
|
||||
return "", fmt.Errorf("state einloesen: %w", err)
|
||||
}
|
||||
return nonce, nil
|
||||
}
|
||||
|
||||
func randomValue() (string, error) {
|
||||
buf := make([]byte, 32)
|
||||
if _, err := rand.Read(buf); err != nil {
|
||||
return "", err
|
||||
}
|
||||
return hex.EncodeToString(buf), nil
|
||||
}
|
||||
@@ -0,0 +1,68 @@
|
||||
package oidc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"os"
|
||||
"testing"
|
||||
|
||||
"github.com/jackc/pgx/v5/pgxpool"
|
||||
)
|
||||
|
||||
func setupStateTest(t *testing.T) (*StateStore, func()) {
|
||||
t.Helper()
|
||||
adminDSN := os.Getenv("TEST_ADMIN_DSN")
|
||||
if adminDSN == "" {
|
||||
t.Skip("TEST_ADMIN_DSN nicht gesetzt, Integrationstest uebersprungen")
|
||||
}
|
||||
ctx := context.Background()
|
||||
|
||||
pool, err := pgxpool.New(ctx, adminDSN)
|
||||
if err != nil {
|
||||
t.Fatalf("pool: %v", err)
|
||||
}
|
||||
if _, err := pool.Exec(ctx, `
|
||||
CREATE TABLE IF NOT EXISTS oidc_states (
|
||||
state TEXT PRIMARY KEY, nonce TEXT NOT NULL, expires_at TIMESTAMPTZ NOT NULL,
|
||||
used_at TIMESTAMPTZ, created_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
)`); err != nil {
|
||||
t.Fatalf("schema: %v", err)
|
||||
}
|
||||
|
||||
cleanup := func() { pool.Close() }
|
||||
return NewStateStore(pool), cleanup
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium/Pruefung 3: State/Nonce-Handling gegen CSRF und Replay.
|
||||
func TestStateStore_ConsumeIsSingleUse(t *testing.T) {
|
||||
store, cleanup := setupStateTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
state, nonce, err := store.Generate(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("generate: %v", err)
|
||||
}
|
||||
|
||||
gotNonce, err := store.Consume(ctx, state)
|
||||
if err != nil {
|
||||
t.Fatalf("consume (erste einloesung): %v", err)
|
||||
}
|
||||
if gotNonce != nonce {
|
||||
t.Fatalf("nonce = %q, want %q", gotNonce, nonce)
|
||||
}
|
||||
|
||||
if _, err := store.Consume(ctx, state); !errors.Is(err, ErrStateInvalid) {
|
||||
t.Fatalf("erwartet ErrStateInvalid bei erneutem einloesen (replay), habe %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestStateStore_RejectsUnknownState(t *testing.T) {
|
||||
store, cleanup := setupStateTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
if _, err := store.Consume(ctx, "niemals-ausgestellter-state"); !errors.Is(err, ErrStateInvalid) {
|
||||
t.Fatalf("erwartet ErrStateInvalid, habe %v", err)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,70 @@
|
||||
package oidc
|
||||
|
||||
import (
|
||||
"crypto/rsa"
|
||||
"errors"
|
||||
"fmt"
|
||||
|
||||
"github.com/golang-jwt/jwt/v5"
|
||||
)
|
||||
|
||||
var ErrInvalidToken = errors.New("oidc: id-token ungueltig, abgelaufen oder falscher aussteller")
|
||||
|
||||
// Claims sind die fuer NEXARCH relevanten OIDC-ID-Token-Claims.
|
||||
type Claims struct {
|
||||
Subject string `json:"sub"`
|
||||
Email string `json:"email"`
|
||||
Nonce string `json:"nonce"`
|
||||
Roles []string `json:"roles"` // providerabhaengiger Claim-Name, hier vereinfacht fest "roles"
|
||||
jwt.RegisteredClaims
|
||||
}
|
||||
|
||||
// Verifier prueft ID-Tokens gegen den JWKS-Schluesselsatz eines konfigurierten
|
||||
// Providers (Akzeptanzkriterium 3: fehlerhafte/abgelaufene Tokens werden
|
||||
// abgewiesen).
|
||||
type Verifier struct {
|
||||
keys map[string]*rsa.PublicKey
|
||||
issuer string
|
||||
}
|
||||
|
||||
func NewVerifier(keys map[string]*rsa.PublicKey, issuer string) *Verifier {
|
||||
return &Verifier{keys: keys, issuer: issuer}
|
||||
}
|
||||
|
||||
// Verify prueft Signatur (gegen JWKS), Ablauf (jwt-Bibliothek lehnt
|
||||
// abgelaufene Tokens automatisch ab) und Aussteller.
|
||||
func (v *Verifier) Verify(idToken string) (*Claims, error) {
|
||||
claims := &Claims{}
|
||||
token, err := jwt.ParseWithClaims(idToken, claims, func(t *jwt.Token) (interface{}, error) {
|
||||
if _, ok := t.Method.(*jwt.SigningMethodRSA); !ok {
|
||||
return nil, ErrInvalidToken
|
||||
}
|
||||
kid, _ := t.Header["kid"].(string)
|
||||
key, ok := v.keys[kid]
|
||||
if !ok {
|
||||
return nil, ErrInvalidToken
|
||||
}
|
||||
return key, nil
|
||||
})
|
||||
if err != nil || !token.Valid {
|
||||
return nil, ErrInvalidToken
|
||||
}
|
||||
if claims.Issuer != v.issuer {
|
||||
return nil, fmt.Errorf("%w: unerwarteter aussteller %q", ErrInvalidToken, claims.Issuer)
|
||||
}
|
||||
return claims, nil
|
||||
}
|
||||
|
||||
// VerifyWithNonce prueft zusaetzlich, dass der nonce-Claim im Token exakt
|
||||
// dem bei der Anfrage ausgestellten Nonce entspricht — verhindert Replay
|
||||
// eines fremden, gueltigen ID-Tokens (Akzeptanzkriterium/Pruefung 3).
|
||||
func (v *Verifier) VerifyWithNonce(idToken, expectedNonce string) (*Claims, error) {
|
||||
claims, err := v.Verify(idToken)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if claims.Nonce == "" || claims.Nonce != expectedNonce {
|
||||
return nil, fmt.Errorf("%w: nonce stimmt nicht ueberein", ErrInvalidToken)
|
||||
}
|
||||
return claims, nil
|
||||
}
|
||||
@@ -0,0 +1,184 @@
|
||||
package oidc
|
||||
|
||||
import (
|
||||
"crypto/rand"
|
||||
"crypto/rsa"
|
||||
"encoding/base64"
|
||||
"encoding/binary"
|
||||
"encoding/json"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/golang-jwt/jwt/v5"
|
||||
)
|
||||
|
||||
func generateTestKey(t *testing.T) *rsa.PrivateKey {
|
||||
t.Helper()
|
||||
key, err := rsa.GenerateKey(rand.Reader, 2048)
|
||||
if err != nil {
|
||||
t.Fatalf("generate rsa key: %v", err)
|
||||
}
|
||||
return key
|
||||
}
|
||||
|
||||
func signTestToken(t *testing.T, key *rsa.PrivateKey, kid string, claims Claims) string {
|
||||
t.Helper()
|
||||
token := jwt.NewWithClaims(jwt.SigningMethodRS256, claims)
|
||||
token.Header["kid"] = kid
|
||||
s, err := token.SignedString(key)
|
||||
if err != nil {
|
||||
t.Fatalf("sign token: %v", err)
|
||||
}
|
||||
return s
|
||||
}
|
||||
|
||||
func TestVerify_AcceptsValidToken(t *testing.T) {
|
||||
key := generateTestKey(t)
|
||||
verifier := NewVerifier(map[string]*rsa.PublicKey{"kid-1": &key.PublicKey}, "https://idp.example.com")
|
||||
|
||||
claims := Claims{
|
||||
Subject: "user-123",
|
||||
Email: "person@example.com",
|
||||
Nonce: "erwarteter-nonce",
|
||||
RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://idp.example.com",
|
||||
ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
|
||||
},
|
||||
}
|
||||
tok := signTestToken(t, key, "kid-1", claims)
|
||||
|
||||
got, err := verifier.Verify(tok)
|
||||
if err != nil {
|
||||
t.Fatalf("verify: %v", err)
|
||||
}
|
||||
if got.Email != "person@example.com" {
|
||||
t.Fatalf("email = %q", got.Email)
|
||||
}
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 3 + Pruefung 2: Token-Signatur- und Ablaufpruefung.
|
||||
func TestVerify_RejectsExpiredToken(t *testing.T) {
|
||||
key := generateTestKey(t)
|
||||
verifier := NewVerifier(map[string]*rsa.PublicKey{"kid-1": &key.PublicKey}, "https://idp.example.com")
|
||||
|
||||
claims := Claims{
|
||||
Subject: "user-123",
|
||||
RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://idp.example.com",
|
||||
ExpiresAt: jwt.NewNumericDate(time.Now().Add(-time.Hour)), // abgelaufen
|
||||
},
|
||||
}
|
||||
tok := signTestToken(t, key, "kid-1", claims)
|
||||
|
||||
if _, err := verifier.Verify(tok); err == nil {
|
||||
t.Fatal("erwartet fehler bei abgelaufenem token")
|
||||
}
|
||||
}
|
||||
|
||||
func TestVerify_RejectsWrongSigningKey(t *testing.T) {
|
||||
realKey := generateTestKey(t)
|
||||
attackerKey := generateTestKey(t)
|
||||
// Verifier kennt NUR den echten oeffentlichen Schluessel.
|
||||
verifier := NewVerifier(map[string]*rsa.PublicKey{"kid-1": &realKey.PublicKey}, "https://idp.example.com")
|
||||
|
||||
claims := Claims{
|
||||
Subject: "user-123",
|
||||
RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://idp.example.com",
|
||||
ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
|
||||
},
|
||||
}
|
||||
// Mit dem Angreifer-Schluessel signiert, aber unter demselben kid wie der echte.
|
||||
tok := signTestToken(t, attackerKey, "kid-1", claims)
|
||||
|
||||
if _, err := verifier.Verify(tok); err == nil {
|
||||
t.Fatal("erwartet fehler bei fremd signiertem token")
|
||||
}
|
||||
}
|
||||
|
||||
func TestVerify_RejectsWrongIssuer(t *testing.T) {
|
||||
key := generateTestKey(t)
|
||||
verifier := NewVerifier(map[string]*rsa.PublicKey{"kid-1": &key.PublicKey}, "https://idp.example.com")
|
||||
|
||||
claims := Claims{
|
||||
Subject: "user-123",
|
||||
RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://ganz-anderer-idp.example.com",
|
||||
ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
|
||||
},
|
||||
}
|
||||
tok := signTestToken(t, key, "kid-1", claims)
|
||||
|
||||
if _, err := verifier.Verify(tok); err == nil {
|
||||
t.Fatal("erwartet fehler bei unerwartetem aussteller")
|
||||
}
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium/Pruefung 3: Nonce-Handling gegen Replay.
|
||||
func TestVerifyWithNonce_RejectsMismatch(t *testing.T) {
|
||||
key := generateTestKey(t)
|
||||
verifier := NewVerifier(map[string]*rsa.PublicKey{"kid-1": &key.PublicKey}, "https://idp.example.com")
|
||||
|
||||
claims := Claims{
|
||||
Subject: "user-123",
|
||||
Nonce: "nonce-a",
|
||||
RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://idp.example.com",
|
||||
ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
|
||||
},
|
||||
}
|
||||
tok := signTestToken(t, key, "kid-1", claims)
|
||||
|
||||
if _, err := verifier.VerifyWithNonce(tok, "nonce-b"); err == nil {
|
||||
t.Fatal("erwartet fehler bei nonce-mismatch (moeglicher replay eines fremden tokens)")
|
||||
}
|
||||
if _, err := verifier.VerifyWithNonce(tok, "nonce-a"); err != nil {
|
||||
t.Fatalf("erwartet erfolg bei passendem nonce: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestParseJWKS_RoundTrip(t *testing.T) {
|
||||
key := generateTestKey(t)
|
||||
|
||||
nBytes := key.PublicKey.N.Bytes()
|
||||
eBuf := make([]byte, 8)
|
||||
binary.BigEndian.PutUint64(eBuf, uint64(key.PublicKey.E))
|
||||
// Fuehrende Nullbytes des Exponenten abschneiden (ueblich bei JWK-Kodierung).
|
||||
eStart := 0
|
||||
for eStart < len(eBuf)-1 && eBuf[eStart] == 0 {
|
||||
eStart++
|
||||
}
|
||||
|
||||
set := jwkSet{Keys: []jwk{{
|
||||
Kid: "kid-1",
|
||||
Kty: "RSA",
|
||||
N: base64.RawURLEncoding.EncodeToString(nBytes),
|
||||
E: base64.RawURLEncoding.EncodeToString(eBuf[eStart:]),
|
||||
}}}
|
||||
data, err := json.Marshal(set)
|
||||
if err != nil {
|
||||
t.Fatalf("marshal: %v", err)
|
||||
}
|
||||
|
||||
parsed, err := ParseJWKS(data)
|
||||
if err != nil {
|
||||
t.Fatalf("parse jwks: %v", err)
|
||||
}
|
||||
got, ok := parsed["kid-1"]
|
||||
if !ok {
|
||||
t.Fatal("erwartet kid-1 im ergebnis")
|
||||
}
|
||||
if got.E != key.PublicKey.E || got.N.Cmp(key.PublicKey.N) != 0 {
|
||||
t.Fatalf("erwartet identischen oeffentlichen schluessel nach roundtrip")
|
||||
}
|
||||
|
||||
// Der wiederhergestellte Schluessel muss ein damit signiertes Token auch tatsaechlich verifizieren.
|
||||
verifier := NewVerifier(parsed, "https://idp.example.com")
|
||||
claims := Claims{Subject: "x", RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://idp.example.com", ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
|
||||
}}
|
||||
tok := signTestToken(t, key, "kid-1", claims)
|
||||
if _, err := verifier.Verify(tok); err != nil {
|
||||
t.Fatalf("verify mit aus jwks wiederhergestelltem schluessel: %v", err)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,71 @@
|
||||
// Package rbac implementiert Core RBAC-01: das Rollenmodell mit
|
||||
// Grundrollen/-rechten, Hierarchie und Zuweisung. Die eigentliche
|
||||
// Durchsetzung (erlaubt/verboten je Request) ist RBAC-02, dieses Paket
|
||||
// liefert nur Modell + Zuweisung (Casbin-Prinzip: Policy-Modell getrennt
|
||||
// von der Entscheidungsfunktion).
|
||||
package rbac
|
||||
|
||||
// Role ist eine der drei Grundrollen. Superadmin lebt mandantenuebergreifend
|
||||
// (siehe internal/user.SuperadminStore aus IAM-01) und wird deshalb NICHT
|
||||
// ueber Store (tenant-gescoped) zugewiesen — die Existenz eines Superadmin-
|
||||
// Kontos IST die Rollenzuweisung.
|
||||
type Role string
|
||||
|
||||
const (
|
||||
RoleSuperadmin Role = "superadmin"
|
||||
RoleTenantAdmin Role = "tenant_admin"
|
||||
RoleUser Role = "user"
|
||||
)
|
||||
|
||||
type Permission string
|
||||
|
||||
const (
|
||||
PermSelfRead Permission = "self.read"
|
||||
PermSelfUpdate Permission = "self.update"
|
||||
PermManageUsers Permission = "tenant.manage_users"
|
||||
PermManageSettings Permission = "tenant.manage_settings"
|
||||
PermManageTenants Permission = "platform.manage_tenants"
|
||||
)
|
||||
|
||||
// parent bildet die Rollenhierarchie ab (Akzeptanzkriterium 2): eine Rolle
|
||||
// erbt alle Rechte ihrer Elternrolle. tenant_admin erbt von user,
|
||||
// superadmin erbt von tenant_admin.
|
||||
var parent = map[Role]Role{
|
||||
RoleTenantAdmin: RoleUser,
|
||||
RoleSuperadmin: RoleTenantAdmin,
|
||||
}
|
||||
|
||||
// direct sind die einer Rolle direkt (ohne Vererbung) zugeordneten Rechte.
|
||||
var direct = map[Role][]Permission{
|
||||
RoleUser: {PermSelfRead, PermSelfUpdate},
|
||||
RoleTenantAdmin: {PermManageUsers, PermManageSettings},
|
||||
RoleSuperadmin: {PermManageTenants},
|
||||
}
|
||||
|
||||
// EffectivePermissions liefert die vollstaendige, ueber die Hierarchie
|
||||
// aufgeloeste Rechtemenge einer Rolle (Akzeptanzkriterium 2 / Pruefung 2).
|
||||
func EffectivePermissions(role Role) []Permission {
|
||||
seen := make(map[Permission]bool)
|
||||
var out []Permission
|
||||
|
||||
for r, ok := role, true; ok; r, ok = parent[r] {
|
||||
for _, p := range direct[r] {
|
||||
if !seen[p] {
|
||||
seen[p] = true
|
||||
out = append(out, p)
|
||||
}
|
||||
}
|
||||
}
|
||||
return out
|
||||
}
|
||||
|
||||
// HasPermission prueft, ob eine Rolle (inklusive geerbter Rechte) ein
|
||||
// bestimmtes Recht besitzt.
|
||||
func HasPermission(role Role, perm Permission) bool {
|
||||
for _, p := range EffectivePermissions(role) {
|
||||
if p == perm {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
@@ -0,0 +1,124 @@
|
||||
package rbac
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
|
||||
"github.com/jackc/pgx/v5"
|
||||
"github.com/jackc/pgx/v5/pgxpool"
|
||||
)
|
||||
|
||||
var (
|
||||
// ErrRoleNotAssignableInTenantScope wird geliefert, wenn versucht wird,
|
||||
// eine mandantenuebergreifende Rolle (superadmin) ueber den tenant-
|
||||
// gescopten Store zu vergeben — die erlaubte Matrix laesst hier nur
|
||||
// user/tenant_admin zu (Akzeptanzkriterium 1 / Pruefung 1).
|
||||
ErrRoleNotAssignableInTenantScope = errors.New("rbac: rolle ist in diesem geltungsbereich nicht zuweisbar")
|
||||
ErrNotFound = errors.New("rbac: keine rollenzuweisung gefunden")
|
||||
)
|
||||
|
||||
// assignableRoles ist die erlaubte Matrix fuer Store (tenant-gescoped).
|
||||
var assignableRoles = map[Role]bool{
|
||||
RoleUser: true,
|
||||
RoleTenantAdmin: true,
|
||||
}
|
||||
|
||||
type Assignment struct {
|
||||
UserID string
|
||||
Role Role
|
||||
GrantedBy string
|
||||
}
|
||||
|
||||
// Store verwaltet Rollenzuweisungen innerhalb GENAU EINER Tenant-Datenbank —
|
||||
// analog zu internal/user.TenantUserStore (Modell C: der Pool bestimmt den
|
||||
// Tenant, keine tenant_id-Spalte noetig).
|
||||
type Store struct {
|
||||
pool *pgxpool.Pool
|
||||
}
|
||||
|
||||
func NewStore(pool *pgxpool.Pool) *Store {
|
||||
return &Store{pool: pool}
|
||||
}
|
||||
|
||||
// Assign vergibt eine Rolle an einen Benutzer. grantedBy identifiziert den
|
||||
// Akteur, der die Zuweisung vorgenommen hat (Akzeptanzkriterium 3). Jede
|
||||
// Zuweisung wird zusaetzlich in role_assignment_history festgehalten, auch
|
||||
// wenn sie eine vorherige Rolle ersetzt.
|
||||
func (s *Store) Assign(ctx context.Context, userID string, role Role, grantedBy string) (Assignment, error) {
|
||||
if !assignableRoles[role] {
|
||||
return Assignment{}, ErrRoleNotAssignableInTenantScope
|
||||
}
|
||||
if grantedBy == "" {
|
||||
return Assignment{}, errors.New("rbac: grantedBy darf nicht leer sein")
|
||||
}
|
||||
|
||||
tx, err := s.pool.Begin(ctx)
|
||||
if err != nil {
|
||||
return Assignment{}, fmt.Errorf("transaktion starten: %w", err)
|
||||
}
|
||||
defer func() { _ = tx.Rollback(ctx) }()
|
||||
|
||||
if _, err := tx.Exec(ctx, `
|
||||
INSERT INTO role_assignments (user_id, role, granted_by, granted_at)
|
||||
VALUES ($1, $2, $3, now())
|
||||
ON CONFLICT (user_id) DO UPDATE SET role = $2, granted_by = $3, granted_at = now()
|
||||
`, userID, string(role), grantedBy); err != nil {
|
||||
return Assignment{}, fmt.Errorf("rolle zuweisen: %w", err)
|
||||
}
|
||||
|
||||
if _, err := tx.Exec(ctx, `
|
||||
INSERT INTO role_assignment_history (user_id, role, granted_by, granted_at)
|
||||
VALUES ($1, $2, $3, now())
|
||||
`, userID, string(role), grantedBy); err != nil {
|
||||
return Assignment{}, fmt.Errorf("historie schreiben: %w", err)
|
||||
}
|
||||
|
||||
if err := tx.Commit(ctx); err != nil {
|
||||
return Assignment{}, fmt.Errorf("transaktion committen: %w", err)
|
||||
}
|
||||
|
||||
return Assignment{UserID: userID, Role: role, GrantedBy: grantedBy}, nil
|
||||
}
|
||||
|
||||
func (s *Store) Get(ctx context.Context, userID string) (Assignment, error) {
|
||||
var a Assignment
|
||||
var role string
|
||||
a.UserID = userID
|
||||
if err := s.pool.QueryRow(ctx, `
|
||||
SELECT role, granted_by FROM role_assignments WHERE user_id = $1
|
||||
`, userID).Scan(&role, &a.GrantedBy); err != nil {
|
||||
if errors.Is(err, pgx.ErrNoRows) {
|
||||
return Assignment{}, ErrNotFound
|
||||
}
|
||||
return Assignment{}, fmt.Errorf("rollenzuweisung lesen: %w", err)
|
||||
}
|
||||
a.Role = Role(role)
|
||||
return a, nil
|
||||
}
|
||||
|
||||
// History liefert jede Rollenzuweisung eines Benutzers in chronologischer
|
||||
// Reihenfolge — die Grundlage fuer "wer hat wann welche Rolle vergeben"
|
||||
// (Akzeptanzkriterium 3).
|
||||
func (s *Store) History(ctx context.Context, userID string) ([]Assignment, error) {
|
||||
rows, err := s.pool.Query(ctx, `
|
||||
SELECT role, granted_by FROM role_assignment_history
|
||||
WHERE user_id = $1 ORDER BY granted_at
|
||||
`, userID)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("historie abfragen: %w", err)
|
||||
}
|
||||
defer rows.Close()
|
||||
|
||||
var out []Assignment
|
||||
for rows.Next() {
|
||||
var role string
|
||||
a := Assignment{UserID: userID}
|
||||
if err := rows.Scan(&role, &a.GrantedBy); err != nil {
|
||||
return nil, fmt.Errorf("historieneintrag lesen: %w", err)
|
||||
}
|
||||
a.Role = Role(role)
|
||||
out = append(out, a)
|
||||
}
|
||||
return out, rows.Err()
|
||||
}
|
||||
@@ -0,0 +1,90 @@
|
||||
// Package saml implementiert Core IAM-11: SAML 2.0 als zusaetzlicher
|
||||
// Anmeldeweg neben OIDC (IAM-06).
|
||||
//
|
||||
// WICHTIGER HINWEIS: Die Signaturpruefung hier verifiziert eine RSA-SHA256-
|
||||
// Signatur ueber die deterministisch (re-)marshalte Assertion — das deckt
|
||||
// dieselbe Sicherheitseigenschaft ab wie XML-DSig (nur ein gueltig
|
||||
// signiertes Assertion eines vertrauten IdP wird akzeptiert), implementiert
|
||||
// aber NICHT die vollstaendige W3C-Exclusive-XML-Canonicalization (C14N) mit
|
||||
// all ihren Randfaellen (Namespace-Normalisierung, Attribut-Reihenfolge
|
||||
// etc.), die produktive SAML-Bibliotheken brauchen, um mit echten
|
||||
// Enterprise-IdPs (ADFS, Okta, Azure AD) byteidentisch zu sein. Das Ticket
|
||||
// erlaubt ausdruecklich einen "simulierten IdP" fuer die Pruefungen — dieser
|
||||
// Simulator und der Verifier hier verwenden folgerichtig dieselbe
|
||||
// deterministische Kodierung, echte Interop mit einem Drittprodukt-IdP ist
|
||||
// nicht Teil dieser Kachel.
|
||||
package saml
|
||||
|
||||
import (
|
||||
"encoding/xml"
|
||||
"fmt"
|
||||
"time"
|
||||
)
|
||||
|
||||
type attributeXML struct {
|
||||
Name string `xml:"Name,attr"`
|
||||
Values []string `xml:"AttributeValue"`
|
||||
}
|
||||
|
||||
type conditionsXML struct {
|
||||
NotBefore string `xml:"NotBefore,attr"`
|
||||
NotOnOrAfter string `xml:"NotOnOrAfter,attr"`
|
||||
}
|
||||
|
||||
// AssertionXML ist die (vereinfachte) SAML-Assertion.
|
||||
type AssertionXML struct {
|
||||
XMLName xml.Name `xml:"Assertion"`
|
||||
Issuer string `xml:"Issuer"`
|
||||
NameID string `xml:"Subject>NameID"`
|
||||
Conditions conditionsXML `xml:"Conditions"`
|
||||
Attributes []attributeXML `xml:"AttributeStatement>Attribute"`
|
||||
}
|
||||
|
||||
// ResponseXML umhuellt die Assertion mit der Signatur ueber deren kanonische
|
||||
// Bytes (siehe Paket-Dokumentation).
|
||||
type ResponseXML struct {
|
||||
XMLName xml.Name `xml:"Response"`
|
||||
Assertion AssertionXML `xml:"Assertion"`
|
||||
SignatureValue string `xml:"SignatureValue"` // base64
|
||||
}
|
||||
|
||||
// CanonicalAssertionBytes liefert die deterministischen Bytes, ueber die
|
||||
// signiert/verifiziert wird.
|
||||
func CanonicalAssertionBytes(a AssertionXML) ([]byte, error) {
|
||||
b, err := xml.Marshal(a)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("assertion serialisieren: %w", err)
|
||||
}
|
||||
return b, nil
|
||||
}
|
||||
|
||||
// Attribute liefert die Werte eines benannten SAML-Attributs (z.B. "roles"),
|
||||
// oder nil wenn nicht vorhanden.
|
||||
func (a AssertionXML) Attribute(name string) []string {
|
||||
for _, attr := range a.Attributes {
|
||||
if attr.Name == name {
|
||||
return attr.Values
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// WithinValidity prueft die Conditions/NotBefore/NotOnOrAfter der Assertion
|
||||
// gegen die aktuelle Zeit.
|
||||
func (a AssertionXML) WithinValidity(now time.Time) error {
|
||||
notBefore, err := time.Parse(time.RFC3339, a.Conditions.NotBefore)
|
||||
if err != nil {
|
||||
return fmt.Errorf("notbefore parsen: %w", err)
|
||||
}
|
||||
notOnOrAfter, err := time.Parse(time.RFC3339, a.Conditions.NotOnOrAfter)
|
||||
if err != nil {
|
||||
return fmt.Errorf("notonorafter parsen: %w", err)
|
||||
}
|
||||
if now.Before(notBefore) {
|
||||
return ErrNotYetValid
|
||||
}
|
||||
if !now.Before(notOnOrAfter) {
|
||||
return ErrExpired
|
||||
}
|
||||
return nil
|
||||
}
|
||||
@@ -0,0 +1,66 @@
|
||||
package saml
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/auth"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/ldapsync"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/user"
|
||||
)
|
||||
|
||||
// CompleteSAMLLogin verifiziert die SAML-Response, bildet die Assertion auf
|
||||
// das bestehende Benutzer-/Rollenmodell ab (Akzeptanzkriterium 3) und
|
||||
// stellt bei Erfolg ein IAM-02-Sitzungs-Token aus. Rollen-Mapping laeuft
|
||||
// ueber DIESELBE Erlaubnis-Matrix wie IAM-05/LDAP und IAM-06/OIDC
|
||||
// (ldapsync.RoleMappingStore) — kein dritter paralleler Mapping-Mechanismus.
|
||||
func CompleteSAMLLogin(
|
||||
ctx context.Context,
|
||||
verifier *Verifier,
|
||||
users *user.TenantUserStore,
|
||||
roles *rbac.Store,
|
||||
roleMapping *ldapsync.RoleMappingStore,
|
||||
issuer *auth.TokenIssuer,
|
||||
tenantSlug, rawSAMLResponse string,
|
||||
) (token string, err error) {
|
||||
resp, err := Parse(rawSAMLResponse)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
assertion, err := verifier.Verify(resp)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
if assertion.NameID == "" {
|
||||
return "", fmt.Errorf("%w: assertion ohne subject-nameid", ErrInvalidSignature)
|
||||
}
|
||||
|
||||
u, err := findOrCreateUser(ctx, users, assertion.NameID)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
roleAttrs := assertion.Attribute("roles")
|
||||
if role, ok, err := roleMapping.HighestRoleFor(ctx, roleAttrs); err != nil {
|
||||
return "", err
|
||||
} else if ok {
|
||||
if _, err := roles.Assign(ctx, u.ID, role, "saml-sso"); err != nil {
|
||||
return "", err
|
||||
}
|
||||
}
|
||||
|
||||
return issuer.Issue(u.ID, tenantSlug)
|
||||
}
|
||||
|
||||
func findOrCreateUser(ctx context.Context, users *user.TenantUserStore, email string) (user.User, error) {
|
||||
creds, err := users.GetByEmailForAuth(ctx, email)
|
||||
if err == nil {
|
||||
return creds.User, nil
|
||||
}
|
||||
if !errors.Is(err, user.ErrNotFound) {
|
||||
return user.User{}, err
|
||||
}
|
||||
return users.Create(ctx, email, email)
|
||||
}
|
||||
@@ -0,0 +1,227 @@
|
||||
package saml
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/rsa"
|
||||
"fmt"
|
||||
"os"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/golang-jwt/jwt/v5"
|
||||
"github.com/jackc/pgx/v5/pgxpool"
|
||||
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/auth"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/ldapsync"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/oidc"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
|
||||
"gitea.perlbach24.de/scripte/nexarch/internal/user"
|
||||
)
|
||||
|
||||
const schema = `
|
||||
CREATE TABLE IF NOT EXISTS users (
|
||||
id UUID PRIMARY KEY DEFAULT gen_random_uuid(), email TEXT NOT NULL UNIQUE, name TEXT NOT NULL,
|
||||
status TEXT NOT NULL DEFAULT 'active', password_hash TEXT NOT NULL DEFAULT '',
|
||||
created_at TIMESTAMPTZ NOT NULL DEFAULT now(), updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS role_assignments (
|
||||
user_id UUID PRIMARY KEY REFERENCES users(id), role TEXT NOT NULL CHECK (role IN ('user','tenant_admin')),
|
||||
granted_by TEXT NOT NULL, granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS role_assignment_history (
|
||||
id UUID PRIMARY KEY DEFAULT gen_random_uuid(), user_id UUID NOT NULL, role TEXT NOT NULL,
|
||||
granted_by TEXT NOT NULL, granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
CREATE TABLE IF NOT EXISTS ldap_group_role_mapping (
|
||||
ldap_group TEXT PRIMARY KEY, role TEXT NOT NULL CHECK (role IN ('user','tenant_admin'))
|
||||
);`
|
||||
|
||||
func setupTest(t *testing.T) (*pgxpool.Pool, func()) {
|
||||
t.Helper()
|
||||
adminDSN := os.Getenv("TEST_ADMIN_DSN")
|
||||
if adminDSN == "" {
|
||||
t.Skip("TEST_ADMIN_DSN nicht gesetzt, Integrationstest uebersprungen")
|
||||
}
|
||||
ctx := context.Background()
|
||||
|
||||
pool, err := pgxpool.New(ctx, adminDSN)
|
||||
if err != nil {
|
||||
t.Fatalf("pool: %v", err)
|
||||
}
|
||||
if _, err := pool.Exec(ctx, schema); err != nil {
|
||||
t.Fatalf("schema: %v", err)
|
||||
}
|
||||
cleanup := func() { pool.Close() }
|
||||
return pool, cleanup
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 1 + Pruefung 1: End-to-End-Test gegen simulierten SAML-IdP.
|
||||
// Akzeptanzkriterium 3 + Pruefung 3: Rollenzuordnung aus SAML-Attributen korrekt.
|
||||
func TestCompleteSAMLLogin_EndToEnd(t *testing.T) {
|
||||
pool, cleanup := setupTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
idpKey := generateTestIdPKey(t)
|
||||
verifier := NewVerifier(&idpKey.PublicKey, "https://test-idp.example.com")
|
||||
users := user.NewTenantUserStore(pool)
|
||||
roles := rbac.NewStore(pool)
|
||||
roleMapping := ldapsync.NewRoleMappingStore(pool)
|
||||
issuer := auth.NewTokenIssuer("test-secret-nur-fuer-tests")
|
||||
|
||||
if err := roleMapping.SetMapping(ctx, "saml-admins", rbac.RoleTenantAdmin); err != nil {
|
||||
t.Fatalf("set mapping: %v", err)
|
||||
}
|
||||
|
||||
email := fmt.Sprintf("saml-test-%d@example.com", time.Now().UnixNano())
|
||||
rawResp, err := BuildResponse(idpKey, testAssertion("https://test-idp.example.com", email, []string{"saml-admins"}))
|
||||
if err != nil {
|
||||
t.Fatalf("build response (simulierter idp): %v", err)
|
||||
}
|
||||
|
||||
token, err := CompleteSAMLLogin(ctx, verifier, users, roles, roleMapping, issuer, "acme", rawResp)
|
||||
if err != nil {
|
||||
t.Fatalf("complete saml login: %v", err)
|
||||
}
|
||||
if token == "" {
|
||||
t.Fatal("erwartet nicht-leeres sitzungs-token")
|
||||
}
|
||||
|
||||
creds, err := users.GetByEmailForAuth(ctx, email)
|
||||
if err != nil {
|
||||
t.Fatalf("user nach login: %v", err)
|
||||
}
|
||||
assignment, err := roles.Get(ctx, creds.User.ID)
|
||||
if err != nil {
|
||||
t.Fatalf("rollenzuweisung lesen: %v", err)
|
||||
}
|
||||
if assignment.Role != rbac.RoleTenantAdmin {
|
||||
t.Fatalf("erwartet tenant_admin aus saml-admins-mapping, habe %q", assignment.Role)
|
||||
}
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 3 + Pruefung 3 (Negativfall): keine Privilege-
|
||||
// Escalation ueber unbekannte/manipulierte Rollen-Attribute.
|
||||
func TestCompleteSAMLLogin_UnmappedRoleGrantsNothing(t *testing.T) {
|
||||
pool, cleanup := setupTest(t)
|
||||
defer cleanup()
|
||||
ctx := context.Background()
|
||||
|
||||
idpKey := generateTestIdPKey(t)
|
||||
verifier := NewVerifier(&idpKey.PublicKey, "https://test-idp.example.com")
|
||||
users := user.NewTenantUserStore(pool)
|
||||
roles := rbac.NewStore(pool)
|
||||
roleMapping := ldapsync.NewRoleMappingStore(pool)
|
||||
issuer := auth.NewTokenIssuer("test-secret-nur-fuer-tests")
|
||||
|
||||
email := fmt.Sprintf("saml-test-%d@example.com", time.Now().UnixNano())
|
||||
rawResp, err := BuildResponse(idpKey, testAssertion("https://test-idp.example.com", email, []string{"tenant_admin", "superadmin"}))
|
||||
if err != nil {
|
||||
t.Fatalf("build response: %v", err)
|
||||
}
|
||||
|
||||
if _, err := CompleteSAMLLogin(ctx, verifier, users, roles, roleMapping, issuer, "acme", rawResp); err != nil {
|
||||
t.Fatalf("complete saml login: %v", err)
|
||||
}
|
||||
|
||||
creds, err := users.GetByEmailForAuth(ctx, email)
|
||||
if err != nil {
|
||||
t.Fatalf("user nach login: %v", err)
|
||||
}
|
||||
if _, err := roles.Get(ctx, creds.User.ID); err == nil {
|
||||
t.Fatal("erwartet KEINE rollenzuweisung fuer nicht gemappte rollen-attribute")
|
||||
}
|
||||
}
|
||||
|
||||
// Akzeptanzkriterium 2 + Pruefung 2: SAML- und OIDC-Anmeldung koennen
|
||||
// nebeneinander fuer unterschiedliche Tenants konfiguriert sein — hier durch
|
||||
// zwei physisch getrennte Tenant-Datenbanken demonstriert (Modell C).
|
||||
func TestSAMLAndOIDC_WorkInParallelForDifferentTenants(t *testing.T) {
|
||||
adminDSN := os.Getenv("TEST_ADMIN_DSN")
|
||||
if adminDSN == "" {
|
||||
t.Skip("TEST_ADMIN_DSN nicht gesetzt, Integrationstest uebersprungen")
|
||||
}
|
||||
ctx := context.Background()
|
||||
|
||||
poolSAML, cleanupSAML := setupTest(t)
|
||||
defer cleanupSAML()
|
||||
|
||||
poolOIDC, err := pgxpool.New(ctx, adminDSN)
|
||||
if err != nil {
|
||||
t.Fatalf("pool oidc: %v", err)
|
||||
}
|
||||
defer poolOIDC.Close()
|
||||
if _, err := poolOIDC.Exec(ctx, schema+`
|
||||
CREATE TABLE IF NOT EXISTS oidc_states (
|
||||
state TEXT PRIMARY KEY, nonce TEXT NOT NULL, expires_at TIMESTAMPTZ NOT NULL,
|
||||
used_at TIMESTAMPTZ, created_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
)`); err != nil {
|
||||
t.Fatalf("schema oidc: %v", err)
|
||||
}
|
||||
|
||||
// Tenant "saml-tenant": SAML konfiguriert.
|
||||
idpKey := generateTestIdPKey(t)
|
||||
samlVerifier := NewVerifier(&idpKey.PublicKey, "https://test-idp.example.com")
|
||||
samlUsers := user.NewTenantUserStore(poolSAML)
|
||||
samlRoles := rbac.NewStore(poolSAML)
|
||||
samlMapping := ldapsync.NewRoleMappingStore(poolSAML)
|
||||
issuer := auth.NewTokenIssuer("test-secret-nur-fuer-tests")
|
||||
|
||||
samlEmail := fmt.Sprintf("saml-parallel-%d@example.com", time.Now().UnixNano())
|
||||
samlResp, err := BuildResponse(idpKey, testAssertion("https://test-idp.example.com", samlEmail, nil))
|
||||
if err != nil {
|
||||
t.Fatalf("build saml response: %v", err)
|
||||
}
|
||||
samlToken, err := CompleteSAMLLogin(ctx, samlVerifier, samlUsers, samlRoles, samlMapping, issuer, "saml-tenant", samlResp)
|
||||
if err != nil {
|
||||
t.Fatalf("saml-tenant login: %v", err)
|
||||
}
|
||||
if samlToken == "" {
|
||||
t.Fatal("erwartet token fuer saml-tenant")
|
||||
}
|
||||
|
||||
// Tenant "oidc-tenant": OIDC konfiguriert, voellig unabhaengige Datenbank.
|
||||
oidcKey := generateTestIdPKey(t)
|
||||
oidcVerifier := oidc.NewVerifier(map[string]*rsa.PublicKey{"kid-1": &oidcKey.PublicKey}, "https://oidc-idp.example.com")
|
||||
oidcStates := oidc.NewStateStore(poolOIDC)
|
||||
oidcUsers := user.NewTenantUserStore(poolOIDC)
|
||||
oidcRoles := rbac.NewStore(poolOIDC)
|
||||
oidcMapping := ldapsync.NewRoleMappingStore(poolOIDC)
|
||||
|
||||
state, nonce, err := oidcStates.Generate(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("oidc generate state: %v", err)
|
||||
}
|
||||
oidcEmail := fmt.Sprintf("oidc-parallel-%d@example.com", time.Now().UnixNano())
|
||||
claims := oidc.Claims{
|
||||
Email: oidcEmail,
|
||||
Nonce: nonce,
|
||||
RegisteredClaims: jwt.RegisteredClaims{
|
||||
Issuer: "https://oidc-idp.example.com", ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
|
||||
},
|
||||
}
|
||||
idToken := signOIDCTestToken(t, oidcKey, claims)
|
||||
|
||||
oidcToken, err := oidc.CompleteOIDCLogin(ctx, oidcVerifier, oidcStates, oidcUsers, oidcRoles, oidcMapping, issuer, "oidc-tenant", state, idToken)
|
||||
if err != nil {
|
||||
t.Fatalf("oidc-tenant login: %v", err)
|
||||
}
|
||||
if oidcToken == "" {
|
||||
t.Fatal("erwartet token fuer oidc-tenant")
|
||||
}
|
||||
|
||||
if samlToken == oidcToken {
|
||||
t.Fatal("tokens sollten unterschiedlich sein")
|
||||
}
|
||||
}
|
||||
|
||||
func signOIDCTestToken(t *testing.T, key *rsa.PrivateKey, claims oidc.Claims) string {
|
||||
t.Helper()
|
||||
token := jwt.NewWithClaims(jwt.SigningMethodRS256, claims)
|
||||
token.Header["kid"] = "kid-1"
|
||||
s, err := token.SignedString(key)
|
||||
if err != nil {
|
||||
t.Fatalf("sign oidc test token: %v", err)
|
||||
}
|
||||
return s
|
||||
}
|
||||
@@ -0,0 +1,107 @@
|
||||
package saml
|
||||
|
||||
import (
|
||||
"crypto"
|
||||
"crypto/rand"
|
||||
"crypto/rsa"
|
||||
"crypto/sha256"
|
||||
"encoding/base64"
|
||||
"encoding/xml"
|
||||
"errors"
|
||||
"fmt"
|
||||
"time"
|
||||
)
|
||||
|
||||
var (
|
||||
ErrInvalidSignature = errors.New("saml: assertion-signatur ungueltig")
|
||||
ErrNotYetValid = errors.New("saml: assertion noch nicht gueltig")
|
||||
ErrExpired = errors.New("saml: assertion abgelaufen")
|
||||
ErrWrongIssuer = errors.New("saml: unerwarteter aussteller")
|
||||
)
|
||||
|
||||
// Verifier prueft SAML-Responses gegen den oeffentlichen Schluessel eines
|
||||
// konfigurierten IdP (Akzeptanzkriterium 1).
|
||||
type Verifier struct {
|
||||
idpPublicKey *rsa.PublicKey
|
||||
idpIssuer string
|
||||
}
|
||||
|
||||
func NewVerifier(idpPublicKey *rsa.PublicKey, idpIssuer string) *Verifier {
|
||||
return &Verifier{idpPublicKey: idpPublicKey, idpIssuer: idpIssuer}
|
||||
}
|
||||
|
||||
// Parse dekodiert eine base64-kodierte SAMLResponse (wie sie im
|
||||
// SAMLResponse-Formularfeld ankommt) in ihre XML-Struktur.
|
||||
func Parse(rawBase64 string) (ResponseXML, error) {
|
||||
data, err := base64.StdEncoding.DecodeString(rawBase64)
|
||||
if err != nil {
|
||||
return ResponseXML{}, fmt.Errorf("base64 dekodieren: %w", err)
|
||||
}
|
||||
var resp ResponseXML
|
||||
if err := xml.Unmarshal(data, &resp); err != nil {
|
||||
return ResponseXML{}, fmt.Errorf("saml-xml parsen: %w", err)
|
||||
}
|
||||
return resp, nil
|
||||
}
|
||||
|
||||
// Verify prueft Signatur, Gueltigkeitszeitraum und Aussteller
|
||||
// (Akzeptanzkriterium 1).
|
||||
func (v *Verifier) Verify(resp ResponseXML) (AssertionXML, error) {
|
||||
sig, err := base64.StdEncoding.DecodeString(resp.SignatureValue)
|
||||
if err != nil {
|
||||
return AssertionXML{}, fmt.Errorf("signatur dekodieren: %w", err)
|
||||
}
|
||||
|
||||
canonical, err := CanonicalAssertionBytes(resp.Assertion)
|
||||
if err != nil {
|
||||
return AssertionXML{}, err
|
||||
}
|
||||
hash := sha256.Sum256(canonical)
|
||||
|
||||
if err := rsa.VerifyPKCS1v15(v.idpPublicKey, crypto.SHA256, hash[:], sig); err != nil {
|
||||
return AssertionXML{}, ErrInvalidSignature
|
||||
}
|
||||
|
||||
if resp.Assertion.Issuer != v.idpIssuer {
|
||||
return AssertionXML{}, fmt.Errorf("%w: %q", ErrWrongIssuer, resp.Assertion.Issuer)
|
||||
}
|
||||
|
||||
if err := resp.Assertion.WithinValidity(time.Now()); err != nil {
|
||||
return AssertionXML{}, err
|
||||
}
|
||||
|
||||
return resp.Assertion, nil
|
||||
}
|
||||
|
||||
// Sign signiert eine Assertion mit dem privaten IdP-Schluessel — wird vom
|
||||
// (simulierten) Test-IdP verwendet, um eine gueltige Response zu erzeugen.
|
||||
// Lebt hier statt nur in Tests, da ein echter Test-IdP-Modus fuer
|
||||
// Entwicklungszwecke (siehe Ticket: "sinnvolle Defaults ohne SAML-
|
||||
// Expertenwissen") denselben Signiervorgang braucht.
|
||||
func Sign(priv *rsa.PrivateKey, assertion AssertionXML) (string, error) {
|
||||
canonical, err := CanonicalAssertionBytes(assertion)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
hash := sha256.Sum256(canonical)
|
||||
sig, err := rsa.SignPKCS1v15(rand.Reader, priv, crypto.SHA256, hash[:])
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("assertion signieren: %w", err)
|
||||
}
|
||||
return base64.StdEncoding.EncodeToString(sig), nil
|
||||
}
|
||||
|
||||
// BuildResponse verpackt eine signierte Assertion in eine base64-kodierte
|
||||
// SAMLResponse, wie sie ein IdP im Browser-POST-Binding zurueckliefert.
|
||||
func BuildResponse(priv *rsa.PrivateKey, assertion AssertionXML) (string, error) {
|
||||
sig, err := Sign(priv, assertion)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
resp := ResponseXML{Assertion: assertion, SignatureValue: sig}
|
||||
data, err := xml.Marshal(resp)
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("response serialisieren: %w", err)
|
||||
}
|
||||
return base64.StdEncoding.EncodeToString(data), nil
|
||||
}
|
||||
@@ -0,0 +1,123 @@
|
||||
package saml
|
||||
|
||||
import (
|
||||
"crypto/rand"
|
||||
"crypto/rsa"
|
||||
"testing"
|
||||
"time"
|
||||
)
|
||||
|
||||
func generateTestIdPKey(t *testing.T) *rsa.PrivateKey {
|
||||
t.Helper()
|
||||
key, err := rsa.GenerateKey(rand.Reader, 2048)
|
||||
if err != nil {
|
||||
t.Fatalf("generate rsa key: %v", err)
|
||||
}
|
||||
return key
|
||||
}
|
||||
|
||||
func testAssertion(issuer, nameID string, roles []string) AssertionXML {
|
||||
now := time.Now()
|
||||
return AssertionXML{
|
||||
Issuer: issuer,
|
||||
NameID: nameID,
|
||||
Conditions: conditionsXML{
|
||||
NotBefore: now.Add(-time.Minute).Format(time.RFC3339),
|
||||
NotOnOrAfter: now.Add(time.Hour).Format(time.RFC3339),
|
||||
},
|
||||
Attributes: []attributeXML{
|
||||
{Name: "roles", Values: roles},
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func TestVerify_AcceptsValidSignedAssertion(t *testing.T) {
|
||||
key := generateTestIdPKey(t)
|
||||
verifier := NewVerifier(&key.PublicKey, "https://idp.example.com")
|
||||
|
||||
rawResp, err := BuildResponse(key, testAssertion("https://idp.example.com", "person@example.com", []string{"sso-admins"}))
|
||||
if err != nil {
|
||||
t.Fatalf("build response: %v", err)
|
||||
}
|
||||
resp, err := Parse(rawResp)
|
||||
if err != nil {
|
||||
t.Fatalf("parse: %v", err)
|
||||
}
|
||||
|
||||
assertion, err := verifier.Verify(resp)
|
||||
if err != nil {
|
||||
t.Fatalf("verify: %v", err)
|
||||
}
|
||||
if assertion.NameID != "person@example.com" {
|
||||
t.Fatalf("nameid = %q", assertion.NameID)
|
||||
}
|
||||
}
|
||||
|
||||
func TestVerify_RejectsTamperedAssertion(t *testing.T) {
|
||||
key := generateTestIdPKey(t)
|
||||
verifier := NewVerifier(&key.PublicKey, "https://idp.example.com")
|
||||
|
||||
rawResp, err := BuildResponse(key, testAssertion("https://idp.example.com", "person@example.com", nil))
|
||||
if err != nil {
|
||||
t.Fatalf("build response: %v", err)
|
||||
}
|
||||
resp, err := Parse(rawResp)
|
||||
if err != nil {
|
||||
t.Fatalf("parse: %v", err)
|
||||
}
|
||||
// Manipulation NACH dem Signieren: NameID aendern (Signatur bleibt die alte).
|
||||
resp.Assertion.NameID = "angreifer@example.com"
|
||||
|
||||
if _, err := verifier.Verify(resp); err != ErrInvalidSignature {
|
||||
t.Fatalf("erwartet ErrInvalidSignature, habe %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestVerify_RejectsWrongIdPKey(t *testing.T) {
|
||||
realKey := generateTestIdPKey(t)
|
||||
attackerKey := generateTestIdPKey(t)
|
||||
verifier := NewVerifier(&realKey.PublicKey, "https://idp.example.com")
|
||||
|
||||
rawResp, err := BuildResponse(attackerKey, testAssertion("https://idp.example.com", "person@example.com", nil))
|
||||
if err != nil {
|
||||
t.Fatalf("build response: %v", err)
|
||||
}
|
||||
resp, _ := Parse(rawResp)
|
||||
|
||||
if _, err := verifier.Verify(resp); err != ErrInvalidSignature {
|
||||
t.Fatalf("erwartet ErrInvalidSignature bei fremd signierter assertion, habe %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestVerify_RejectsExpiredAssertion(t *testing.T) {
|
||||
key := generateTestIdPKey(t)
|
||||
verifier := NewVerifier(&key.PublicKey, "https://idp.example.com")
|
||||
|
||||
expired := testAssertion("https://idp.example.com", "person@example.com", nil)
|
||||
expired.Conditions.NotOnOrAfter = time.Now().Add(-time.Hour).Format(time.RFC3339)
|
||||
|
||||
rawResp, err := BuildResponse(key, expired)
|
||||
if err != nil {
|
||||
t.Fatalf("build response: %v", err)
|
||||
}
|
||||
resp, _ := Parse(rawResp)
|
||||
|
||||
if _, err := verifier.Verify(resp); err != ErrExpired {
|
||||
t.Fatalf("erwartet ErrExpired, habe %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestVerify_RejectsWrongIssuer(t *testing.T) {
|
||||
key := generateTestIdPKey(t)
|
||||
verifier := NewVerifier(&key.PublicKey, "https://idp.example.com")
|
||||
|
||||
rawResp, err := BuildResponse(key, testAssertion("https://anderer-idp.example.com", "person@example.com", nil))
|
||||
if err != nil {
|
||||
t.Fatalf("build response: %v", err)
|
||||
}
|
||||
resp, _ := Parse(rawResp)
|
||||
|
||||
if _, err := verifier.Verify(resp); err == nil {
|
||||
t.Fatal("erwartet fehler bei unerwartetem aussteller")
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,2 @@
|
||||
DROP TABLE IF EXISTS role_assignment_history;
|
||||
DROP TABLE IF EXISTS role_assignments;
|
||||
@@ -0,0 +1,23 @@
|
||||
-- Rollenzuweisung pro Benutzer (RBAC-01, siehe core-kanban/tickets/RBAC-01.md).
|
||||
-- Nur 'user' und 'tenant_admin' sind hier zuweisbar — 'superadmin' lebt
|
||||
-- mandantenuebergreifend in der Registry (IAM-01 SuperadminStore) und hat
|
||||
-- daher bewusst KEINE Zeile in dieser tenant-lokalen Tabelle (Akzeptanz-
|
||||
-- kriterium 1: nur Zuweisungen innerhalb der erlaubten Matrix).
|
||||
CREATE TABLE role_assignments (
|
||||
user_id UUID PRIMARY KEY REFERENCES users(id),
|
||||
role TEXT NOT NULL CHECK (role IN ('user', 'tenant_admin')),
|
||||
granted_by TEXT NOT NULL,
|
||||
granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
|
||||
-- Vollstaendige Historie jeder Rollenaenderung (Akzeptanzkriterium 3: wer
|
||||
-- hat wann welche Rolle vergeben).
|
||||
CREATE TABLE role_assignment_history (
|
||||
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
|
||||
user_id UUID NOT NULL,
|
||||
role TEXT NOT NULL,
|
||||
granted_by TEXT NOT NULL,
|
||||
granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
|
||||
CREATE INDEX role_assignment_history_user_idx ON role_assignment_history (user_id, granted_at);
|
||||
@@ -0,0 +1,2 @@
|
||||
DROP TABLE IF EXISTS ldap_group_role_mapping;
|
||||
DROP TABLE IF EXISTS ldap_config;
|
||||
@@ -0,0 +1,22 @@
|
||||
-- LDAP/Active-Directory-Anbindung (IAM-05, siehe core-kanban/tickets/IAM-05.md).
|
||||
-- Bind-Credentials liegen NIE in dieser Tabelle im Klartext — bind_password_env
|
||||
-- nennt nur den Namen einer Umgebungsvariable, aus der das Passwort zur
|
||||
-- Laufzeit gelesen wird (Projekt-Konvention: Secrets nur ueber Env-Vars).
|
||||
CREATE TABLE ldap_config (
|
||||
id BOOLEAN PRIMARY KEY DEFAULT true CHECK (id),
|
||||
url TEXT NOT NULL,
|
||||
bind_dn TEXT NOT NULL,
|
||||
bind_password_env TEXT NOT NULL,
|
||||
base_dn TEXT NOT NULL,
|
||||
user_filter TEXT NOT NULL DEFAULT '(objectClass=person)',
|
||||
updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
|
||||
-- Erlaubnis-Matrix LDAP-Gruppe -> NEXARCH-Rolle (Akzeptanzkriterium 3).
|
||||
-- Eine LDAP-Gruppe OHNE Eintrag hier vergibt KEINE Rolle — kein impliziter
|
||||
-- Zugriff durch Gruppennamen-Zufall (Privilege-Escalation-Schutz, siehe
|
||||
-- "Bekannte Fehler vermeiden" im Ticket).
|
||||
CREATE TABLE ldap_group_role_mapping (
|
||||
ldap_group TEXT PRIMARY KEY,
|
||||
role TEXT NOT NULL CHECK (role IN ('user', 'tenant_admin'))
|
||||
);
|
||||
@@ -0,0 +1 @@
|
||||
DROP TABLE IF EXISTS oidc_states;
|
||||
@@ -0,0 +1,10 @@
|
||||
-- CSRF-/Replay-Schutz fuer OIDC-Login (IAM-06, siehe
|
||||
-- core-kanban/tickets/IAM-06.md). Einmal-Verwendung erzwungen ueber
|
||||
-- used_at IS NULL in der Consume-Abfrage, analog IAM-03/IAM-09.
|
||||
CREATE TABLE oidc_states (
|
||||
state TEXT PRIMARY KEY,
|
||||
nonce TEXT NOT NULL,
|
||||
expires_at TIMESTAMPTZ NOT NULL,
|
||||
used_at TIMESTAMPTZ,
|
||||
created_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
@@ -0,0 +1 @@
|
||||
DROP TABLE IF EXISTS saml_config;
|
||||
@@ -0,0 +1,13 @@
|
||||
-- SAML 2.0-Anbindung (IAM-11, siehe core-kanban/tickets/IAM-11.md).
|
||||
-- Singleton-Zeile je Tenant-Datenbank (Modell C) — dieselbe Isolation, die
|
||||
-- IAM-06 (OIDC) fuer nebeneinander konfigurierte Anmeldewege je Tenant
|
||||
-- nutzt: Tenant A kann diese Tabelle befuellt haben, Tenant B stattdessen
|
||||
-- eine OIDC-Konfiguration, ohne dass sich beides je begegnet
|
||||
-- (Akzeptanzkriterium 2).
|
||||
CREATE TABLE saml_config (
|
||||
id BOOLEAN PRIMARY KEY DEFAULT true CHECK (id),
|
||||
idp_issuer TEXT NOT NULL,
|
||||
idp_certificate TEXT NOT NULL, -- PEM-kodiertes oeffentliches Zertifikat des IdP
|
||||
sp_entity_id TEXT NOT NULL,
|
||||
updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
|
||||
);
|
||||
@@ -1,16 +1,11 @@
|
||||
#!/usr/bin/env bash
|
||||
set -euo pipefail
|
||||
|
||||
PASS="${NEXARCH_TEST_DB_PASSWORD:?Setze NEXARCH_TEST_DB_PASSWORD vor dem Aufruf}"
|
||||
ROLE="nexarch_test"
|
||||
|
||||
export PGPASSWORD="$PASS"
|
||||
|
||||
psql -h localhost -U "$ROLE" -d postgres -v ON_ERROR_STOP=1 -c "DROP TABLE IF EXISTS tenants CASCADE;"
|
||||
|
||||
dbs=$(psql -h localhost -U "$ROLE" -d postgres -tAc "SELECT datname FROM pg_database WHERE datname LIKE 'tenant\_%' ESCAPE '\'")
|
||||
for db in $dbs; do
|
||||
psql -h localhost -U "$ROLE" -d postgres -v ON_ERROR_STOP=1 -c "DROP DATABASE IF EXISTS \"${db}\";"
|
||||
done
|
||||
|
||||
echo "Testumgebung zurueckgesetzt: registry-tabelle + $(echo "$dbs" | grep -c . || true) tenant-datenbank(en) entfernt."
|
||||
|
||||
@@ -1,18 +1,12 @@
|
||||
#!/usr/bin/env bash
|
||||
set -euo pipefail
|
||||
|
||||
PASS="${NEXARCH_TEST_DB_PASSWORD:?Setze NEXARCH_TEST_DB_PASSWORD vor dem Aufruf}"
|
||||
cd "$(dirname "$0")/.."
|
||||
|
||||
NEXARCH_TEST_DB_PASSWORD="$PASS" bash scripts/reset-test-env.sh
|
||||
|
||||
export TEST_ADMIN_DSN="postgresql://nexarch_test:${PASS}@localhost:5432/postgres?sslmode=disable"
|
||||
|
||||
echo "== go build =="
|
||||
go build ./...
|
||||
|
||||
echo "== go vet =="
|
||||
go vet ./...
|
||||
|
||||
echo "== go test (-p 1) =="
|
||||
go test ./... -p 1 -count=1
|
||||
|
||||
Reference in New Issue
Block a user