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1
Commits
| Author | SHA1 | Date | |
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f7863fd4d2 |
@@ -1,27 +0,0 @@
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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
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// Schnittstelle — die Sync-/Rollenzuordnungs-Logik ist gegen einen Fake in
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// 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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// 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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// 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
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// entsprechen. Ein Fehler bedeutet "Quelle nicht erreichbar oder
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// fehlerhaft" — Run() bricht dann komplett und folgenlos ab
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// (Akzeptanzkriterium 2).
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Search() ([]Entry, error)
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}
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@@ -1,204 +0,0 @@
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package ldapsync
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"testing"
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"time"
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"github.com/jackc/pgx/v5/pgxpool"
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"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
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"gitea.perlbach24.de/scripte/nexarch/internal/user"
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)
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type fakeClient struct {
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entries []Entry
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err error
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}
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func (f *fakeClient) Search() ([]Entry, error) {
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if f.err != nil {
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return nil, f.err
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}
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return f.entries, nil
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}
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func setupTest(t *testing.T) (*user.TenantUserStore, *rbac.Store, *RoleMappingStore, func()) {
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t.Helper()
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adminDSN := os.Getenv("TEST_ADMIN_DSN")
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if adminDSN == "" {
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t.Skip("TEST_ADMIN_DSN nicht gesetzt, Integrationstest uebersprungen")
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}
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ctx := context.Background()
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pool, err := pgxpool.New(ctx, adminDSN)
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if err != nil {
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t.Fatalf("pool: %v", err)
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}
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if _, err := pool.Exec(ctx, `
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CREATE TABLE IF NOT EXISTS users (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(), email TEXT NOT NULL UNIQUE, name TEXT NOT NULL,
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status TEXT NOT NULL DEFAULT 'active', password_hash TEXT NOT NULL DEFAULT '',
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created_at TIMESTAMPTZ NOT NULL DEFAULT now(), updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
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);
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CREATE TABLE IF NOT EXISTS role_assignments (
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user_id UUID PRIMARY KEY REFERENCES users(id), role TEXT NOT NULL CHECK (role IN ('user','tenant_admin')),
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granted_by TEXT NOT NULL, granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
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);
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CREATE TABLE IF NOT EXISTS role_assignment_history (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(), user_id UUID NOT NULL, role TEXT NOT NULL,
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granted_by TEXT NOT NULL, granted_at TIMESTAMPTZ NOT NULL DEFAULT now()
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);
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CREATE TABLE IF NOT EXISTS ldap_group_role_mapping (
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ldap_group TEXT PRIMARY KEY, role TEXT NOT NULL CHECK (role IN ('user','tenant_admin'))
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);
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`); err != nil {
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t.Fatalf("schema: %v", err)
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}
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cleanup := func() { pool.Close() }
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return user.NewTenantUserStore(pool), rbac.NewStore(pool), NewRoleMappingStore(pool), cleanup
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}
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func uniqueEmail() string {
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return fmt.Sprintf("ldap-test-%d@example.com", time.Now().UnixNano())
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}
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// Akzeptanzkriterium 3 + Pruefung 1: Rollen-Erlaubnis-Matrix mit Positiv- und
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// Negativfaellen — keine Privilege-Escalation ueber Gruppenmitgliedschaft.
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func TestRoleMapping_PositiveAndNegativeCases(t *testing.T) {
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_, _, mappings, cleanup := setupTest(t)
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defer cleanup()
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ctx := context.Background()
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if err := mappings.SetMapping(ctx, "cn=IT-Admins,ou=groups,dc=example,dc=com", rbac.RoleTenantAdmin); err != nil {
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t.Fatalf("set mapping: %v", err)
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}
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// Positivfall: gemappte Gruppe liefert die konfigurierte Rolle.
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role, ok, err := mappings.HighestRoleFor(ctx, []string{"cn=IT-Admins,ou=groups,dc=example,dc=com"})
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if err != nil {
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t.Fatalf("highest role: %v", err)
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}
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if !ok || role != rbac.RoleTenantAdmin {
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t.Fatalf("erwartet tenant_admin, habe ok=%v role=%q", ok, role)
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}
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// Negativfall 1: unbekannte Gruppe vergibt keine Rolle.
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_, ok, err = mappings.HighestRoleFor(ctx, []string{"cn=Praktikanten,ou=groups,dc=example,dc=com"})
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if err != nil {
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t.Fatalf("highest role (unbekannt): %v", err)
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}
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if ok {
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t.Fatal("erwartet KEINE rolle fuer nicht gemappte gruppe")
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}
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// Negativfall 2 (Privilege-Escalation-Versuch): eine Gruppe, die zufaellig
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// wie eine interne Rolle heisst, aber NIE explizit gemappt wurde, darf
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// keine Rolle vergeben.
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_, ok, err = mappings.HighestRoleFor(ctx, []string{"tenant_admin", "superadmin"})
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if err != nil {
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t.Fatalf("highest role (namens-trick): %v", err)
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}
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if ok {
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t.Fatal("erwartet KEINE privilege-escalation ueber gruppennamen, die wie rollen aussehen")
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}
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}
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// Akzeptanzkriterium 1: Synchronisationslauf legt Benutzer an.
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func TestSyncer_CreatesUsers(t *testing.T) {
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users, roles, mappings, cleanup := setupTest(t)
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defer cleanup()
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ctx := context.Background()
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email := uniqueEmail()
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client := &fakeClient{entries: []Entry{{Email: email, Name: "LDAP Nutzer"}}}
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syncer := NewSyncer(client, users, roles, mappings)
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result, err := syncer.Run(ctx)
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if err != nil {
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t.Fatalf("run: %v", err)
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}
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if result.Created != 1 {
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t.Fatalf("erwartet 1 angelegten benutzer, habe %d", result.Created)
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}
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if _, err := users.GetByEmailForAuth(ctx, email); err != nil {
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t.Fatalf("benutzer sollte existieren: %v", err)
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}
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}
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// Akzeptanzkriterium 2 + Pruefung 2: fehlerhafte/nicht erreichbare LDAP-
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// Quelle bricht kontrolliert ab, ohne bestehende Konten zu beschaedigen.
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func TestSyncer_AbortsCleanlyOnSourceError(t *testing.T) {
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users, roles, mappings, cleanup := setupTest(t)
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defer cleanup()
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ctx := context.Background()
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// Ein bereits bestehendes Konto, das UNBERUEHRT bleiben muss.
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existingEmail := uniqueEmail()
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existing, err := users.Create(ctx, existingEmail, "Bestehender Nutzer")
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if err != nil {
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t.Fatalf("create existing: %v", err)
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}
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client := &fakeClient{err: errors.New("ldap-server nicht erreichbar (simuliert)")}
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syncer := NewSyncer(client, users, roles, mappings)
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if _, err := syncer.Run(ctx); err == nil {
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t.Fatal("erwartet fehler bei nicht erreichbarer ldap-quelle")
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}
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// Bestehendes Konto unveraendert (noch aktiv, keine geloeschten/neuen Zeilen).
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got, err := users.Get(ctx, existing.ID)
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if err != nil {
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t.Fatalf("bestehendes konto sollte weiterhin existieren: %v", err)
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}
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if got.Status != user.StatusActive {
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t.Fatalf("bestehendes konto sollte unveraendert aktiv sein, ist %q", got.Status)
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}
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}
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// Akzeptanzkriterium 3 + Pruefung 3: Deaktivierung in LDAP wird bei
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// naechster Synchronisation korrekt uebernommen.
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func TestSyncer_AppliesDeactivationOnNextRun(t *testing.T) {
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users, roles, mappings, cleanup := setupTest(t)
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defer cleanup()
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ctx := context.Background()
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email := uniqueEmail()
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client := &fakeClient{entries: []Entry{{Email: email, Name: "Wird Deaktiviert"}}}
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syncer := NewSyncer(client, users, roles, mappings)
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if _, err := syncer.Run(ctx); err != nil {
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t.Fatalf("erster lauf: %v", err)
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}
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u, err := users.GetByEmailForAuth(ctx, email)
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if err != nil {
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t.Fatalf("benutzer nach erstem lauf: %v", err)
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}
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if u.User.Status != user.StatusActive {
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t.Fatalf("erwartet aktiv nach erstem lauf, habe %q", u.User.Status)
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}
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// Zweiter Lauf: derselbe Benutzer ist jetzt in LDAP deaktiviert.
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client.entries[0].Disabled = true
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result, err := syncer.Run(ctx)
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if err != nil {
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t.Fatalf("zweiter lauf: %v", err)
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}
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if result.Deactivated != 1 {
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t.Fatalf("erwartet 1 deaktivierung, habe %d", result.Deactivated)
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}
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u, err = users.GetByEmailForAuth(ctx, email)
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if err != nil {
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t.Fatalf("benutzer nach zweitem lauf: %v", err)
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}
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if u.User.Status != user.StatusInactive {
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t.Fatalf("erwartet inaktiv nach deaktivierung in ldap, habe %q", u.User.Status)
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}
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}
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@@ -1,79 +0,0 @@
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package ldapsync
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import (
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"context"
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"errors"
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"fmt"
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"github.com/jackc/pgx/v5"
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"github.com/jackc/pgx/v5/pgxpool"
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"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
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)
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// RoleMappingStore verwaltet die Erlaubnis-Matrix LDAP-Gruppe -> Rolle
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// (Akzeptanzkriterium 3). Nur explizit gemappte Gruppen vergeben eine Rolle
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// — der Schutz gegen Privilege-Escalation ist strukturell: es gibt keinen
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// Code-Pfad, der eine unbekannte Gruppe irgendeiner Rolle zuordnet.
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type RoleMappingStore struct {
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pool *pgxpool.Pool
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}
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func NewRoleMappingStore(pool *pgxpool.Pool) *RoleMappingStore {
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return &RoleMappingStore{pool: pool}
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}
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// SetMapping ordnet eine LDAP-Gruppe genau einer NEXARCH-Rolle zu. Nur
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// 'user'/'tenant_admin' sind zuweisbar (dieselbe Matrix wie RBAC-01/03) —
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// 'superadmin' bleibt mandantenuebergreifend und nie ueber LDAP erreichbar.
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func (s *RoleMappingStore) SetMapping(ctx context.Context, ldapGroup string, role rbac.Role) error {
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if role != rbac.RoleUser && role != rbac.RoleTenantAdmin {
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return fmt.Errorf("ldapsync: rolle %q ist ueber ldap nicht zuweisbar", role)
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}
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_, err := s.pool.Exec(ctx, `
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INSERT INTO ldap_group_role_mapping (ldap_group, role) VALUES ($1, $2)
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ON CONFLICT (ldap_group) DO UPDATE SET role = $2
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`, ldapGroup, string(role))
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if err != nil {
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return fmt.Errorf("gruppenzuordnung speichern: %w", err)
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}
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return nil
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}
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// roleFor liefert die einer LDAP-Gruppe zugeordnete Rolle, sofern konfiguriert.
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func (s *RoleMappingStore) roleFor(ctx context.Context, ldapGroup string) (rbac.Role, bool, error) {
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var role string
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err := s.pool.QueryRow(ctx, `SELECT role FROM ldap_group_role_mapping WHERE ldap_group = $1`, ldapGroup).Scan(&role)
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if err != nil {
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if errors.Is(err, pgx.ErrNoRows) {
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return "", false, nil
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}
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return "", false, fmt.Errorf("gruppenzuordnung lesen: %w", err)
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}
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return rbac.Role(role), true, nil
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}
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// HighestRoleFor bestimmt aus einer Liste von LDAP-Gruppen die hoechste
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// zugeordnete Rolle (tenant_admin > user). Gruppen ohne Eintrag in der
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// Matrix tragen NICHTS bei — auch nicht, wenn ihr Name zufaellig wie eine
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// interne Rolle aussieht (Akzeptanzkriterium 3 / Pruefung 1: keine
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// Privilege-Escalation ueber Gruppenmitgliedschaft).
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func (s *RoleMappingStore) HighestRoleFor(ctx context.Context, ldapGroups []string) (rbac.Role, bool, error) {
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var best rbac.Role
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found := false
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for _, g := range ldapGroups {
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role, ok, err := s.roleFor(ctx, g)
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if err != nil {
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return "", false, err
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}
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if !ok {
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continue
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}
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if !found || role == rbac.RoleTenantAdmin {
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best = role
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found = true
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}
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}
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return best, found, nil
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}
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@@ -1,93 +0,0 @@
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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"
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||||||
"fmt"
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||||||
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"gitea.perlbach24.de/scripte/nexarch/internal/rbac"
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"gitea.perlbach24.de/scripte/nexarch/internal/user"
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)
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// SyncResult fasst das Ergebnis eines Synchronisationslaufs zusammen.
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type SyncResult struct {
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Created int
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Updated int
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Deactivated int
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Failed []string // Email-Adressen, bei denen die Verarbeitung fehlschlug
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}
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// Syncer fuehrt die Benutzer-/Rollen-Synchronisation aus LDAP aus.
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type Syncer struct {
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client Client
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users *user.TenantUserStore
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roles *rbac.Store
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mappings *RoleMappingStore
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}
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||||||
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func NewSyncer(client Client, users *user.TenantUserStore, roles *rbac.Store, mappings *RoleMappingStore) *Syncer {
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||||||
return &Syncer{client: client, users: users, roles: roles, mappings: mappings}
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||||||
}
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||||||
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||||||
// Run synchronisiert Benutzer aus LDAP (Akzeptanzkriterium 1). Ist die
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|
||||||
// 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 +1,86 @@
|
|||||||
|
package moduletrust
|
||||||
|
|
||||||
|
import (
|
||||||
|
"context"
|
||||||
|
"fmt"
|
||||||
|
"sync"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
// StaleCache ist der generische Rechte-/Feature-Flag-Cache-Kontrakt
|
||||||
|
// (Akzeptanzkriterium 2): TTL-basiert, mit explizitem, benanntem Verhalten
|
||||||
|
// bei abgelaufenem Cache waehrend Core nicht erreichbar ist.
|
||||||
|
//
|
||||||
|
// - Get: FAIL-OPEN fuer Lesevorgaenge. Schlaegt der Refresh fehl, aber es
|
||||||
|
// gibt bereits einen (wenn auch abgelaufenen) Stand, wird dieser mit
|
||||||
|
// stale=true zurueckgegeben — Begruendung: ein bereits authentifiziertes
|
||||||
|
// Modul soll mit dem letztbekannten Stand weiterarbeiten koennen statt
|
||||||
|
// hart zu blockieren (siehe "Bekannte Fehler vermeiden" im Ticket).
|
||||||
|
// Existiert noch nie ein Stand, gibt es keinen sinnvollen Fallback —
|
||||||
|
// dann liefert auch Get einen Fehler.
|
||||||
|
// - RequireFresh: FAIL-CLOSED fuer sicherheitskritische Aktionen (z.B.
|
||||||
|
// ein komplett NEUER Login). Nutzt NIEMALS einen zwischengespeicherten
|
||||||
|
// Stand, ruft immer frisch ab — Begruendung: eine neue Vertrauens-
|
||||||
|
// entscheidung darf nicht auf veralteten Daten beruhen, auch wenn das
|
||||||
|
// bedeutet, dass die Aktion bei Core-Ausfall sichtbar fehlschlaegt statt
|
||||||
|
// unsicher "irgendwie" durchgelassen zu werden.
|
||||||
|
//
|
||||||
|
// LIC-02 (internal/flag.Service) implementiert bereits denselben Kontrakt
|
||||||
|
// fuer Feature-Flags — StaleCache verallgemeinert dasselbe Muster fuer
|
||||||
|
// JWT-Signaturschluessel, damit beide Faelle derselben dokumentierten
|
||||||
|
// Policy folgen.
|
||||||
|
type StaleCache[T any] struct {
|
||||||
|
mu sync.RWMutex
|
||||||
|
value T
|
||||||
|
hasValue bool
|
||||||
|
fetchedAt time.Time
|
||||||
|
ttl time.Duration
|
||||||
|
fetch func(ctx context.Context) (T, error)
|
||||||
|
}
|
||||||
|
|
||||||
|
func NewStaleCache[T any](ttl time.Duration, fetch func(ctx context.Context) (T, error)) *StaleCache[T] {
|
||||||
|
return &StaleCache[T]{ttl: ttl, fetch: fetch}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Get liefert den Cache-Wert. FAIL-OPEN: bei Refresh-Fehler wird ein
|
||||||
|
// vorhandener, ggf. abgelaufener Stand zurueckgegeben (stale=true).
|
||||||
|
func (c *StaleCache[T]) Get(ctx context.Context) (value T, stale bool, err error) {
|
||||||
|
c.mu.RLock()
|
||||||
|
fresh := c.hasValue && time.Since(c.fetchedAt) < c.ttl
|
||||||
|
if fresh {
|
||||||
|
v := c.value
|
||||||
|
c.mu.RUnlock()
|
||||||
|
return v, false, nil
|
||||||
|
}
|
||||||
|
c.mu.RUnlock()
|
||||||
|
|
||||||
|
newVal, fetchErr := c.fetch(ctx)
|
||||||
|
if fetchErr == nil {
|
||||||
|
c.mu.Lock()
|
||||||
|
c.value, c.hasValue, c.fetchedAt = newVal, true, time.Now()
|
||||||
|
c.mu.Unlock()
|
||||||
|
return newVal, false, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
c.mu.RLock()
|
||||||
|
defer c.mu.RUnlock()
|
||||||
|
if c.hasValue {
|
||||||
|
return c.value, true, nil
|
||||||
|
}
|
||||||
|
var zero T
|
||||||
|
return zero, false, fmt.Errorf("cache leer und refresh fehlgeschlagen: %w", fetchErr)
|
||||||
|
}
|
||||||
|
|
||||||
|
// RequireFresh ruft IMMER frisch ab (FAIL-CLOSED) — fuer sicherheitskritische
|
||||||
|
// Aktionen, die niemals auf einem zwischengespeicherten Stand basieren duerfen.
|
||||||
|
func (c *StaleCache[T]) RequireFresh(ctx context.Context) (T, error) {
|
||||||
|
v, err := c.fetch(ctx)
|
||||||
|
if err != nil {
|
||||||
|
var zero T
|
||||||
|
return zero, fmt.Errorf("core nicht erreichbar, sicherheitskritische aktion abgelehnt: %w", err)
|
||||||
|
}
|
||||||
|
c.mu.Lock()
|
||||||
|
c.value, c.hasValue, c.fetchedAt = v, true, time.Now()
|
||||||
|
c.mu.Unlock()
|
||||||
|
return v, nil
|
||||||
|
}
|
||||||
@@ -0,0 +1,79 @@
|
|||||||
|
package moduletrust
|
||||||
|
|
||||||
|
import (
|
||||||
|
"encoding/base64"
|
||||||
|
"encoding/json"
|
||||||
|
"fmt"
|
||||||
|
"net/http"
|
||||||
|
"time"
|
||||||
|
|
||||||
|
"github.com/golang-jwt/jwt/v5"
|
||||||
|
)
|
||||||
|
|
||||||
|
type Claims struct {
|
||||||
|
Subject string `json:"sub"`
|
||||||
|
TenantSlug string `json:"tenant"`
|
||||||
|
jwt.RegisteredClaims
|
||||||
|
}
|
||||||
|
|
||||||
|
// Issue signiert ein Token mit dem aktuellen Signierschluessel und traegt
|
||||||
|
// dessen KID im JWT-Header ein — der Verifier auf Modulseite waehlt darueber
|
||||||
|
// den passenden oeffentlichen Schluessel aus PublicKeySet() aus.
|
||||||
|
func (m *KeyManager) Issue(subject, tenantSlug string, ttl time.Duration) (string, error) {
|
||||||
|
key, err := m.SigningKey()
|
||||||
|
if err != nil {
|
||||||
|
return "", err
|
||||||
|
}
|
||||||
|
|
||||||
|
now := time.Now()
|
||||||
|
claims := Claims{
|
||||||
|
Subject: subject,
|
||||||
|
TenantSlug: tenantSlug,
|
||||||
|
RegisteredClaims: jwt.RegisteredClaims{
|
||||||
|
IssuedAt: jwt.NewNumericDate(now),
|
||||||
|
ExpiresAt: jwt.NewNumericDate(now.Add(ttl)),
|
||||||
|
},
|
||||||
|
}
|
||||||
|
token := jwt.NewWithClaims(jwt.SigningMethodEdDSA, claims)
|
||||||
|
token.Header["kid"] = key.KID
|
||||||
|
return token.SignedString(key.Private)
|
||||||
|
}
|
||||||
|
|
||||||
|
type jwksResponse struct {
|
||||||
|
Keys []jwksKey `json:"keys"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type jwksKey struct {
|
||||||
|
Kid string `json:"kid"`
|
||||||
|
PublicKey string `json:"public_key"` // base64 (raw Ed25519, 32 Byte)
|
||||||
|
}
|
||||||
|
|
||||||
|
// ServeJWKS liefert alle bekannten oeffentlichen Schluessel als JSON —
|
||||||
|
// Module fragen dies periodisch ab (nicht pro Request), siehe Verifier.
|
||||||
|
func (m *KeyManager) ServeJWKS(w http.ResponseWriter, r *http.Request) {
|
||||||
|
set := m.PublicKeySet()
|
||||||
|
resp := jwksResponse{Keys: make([]jwksKey, 0, len(set))}
|
||||||
|
for kid, pub := range set {
|
||||||
|
resp.Keys = append(resp.Keys, jwksKey{Kid: kid, PublicKey: base64.StdEncoding.EncodeToString(pub)})
|
||||||
|
}
|
||||||
|
w.Header().Set("Content-Type", "application/json")
|
||||||
|
_ = json.NewEncoder(w).Encode(resp)
|
||||||
|
}
|
||||||
|
|
||||||
|
// ParseJWKS dekodiert die JSON-Antwort von ServeJWKS zurueck in kid->PublicKey
|
||||||
|
// — Hilfsfunktion fuer Module, die JWKS per HTTP abrufen.
|
||||||
|
func ParseJWKS(data []byte) (map[string][]byte, error) {
|
||||||
|
var resp jwksResponse
|
||||||
|
if err := json.Unmarshal(data, &resp); err != nil {
|
||||||
|
return nil, fmt.Errorf("jwks parsen: %w", err)
|
||||||
|
}
|
||||||
|
out := make(map[string][]byte, len(resp.Keys))
|
||||||
|
for _, k := range resp.Keys {
|
||||||
|
raw, err := base64.StdEncoding.DecodeString(k.PublicKey)
|
||||||
|
if err != nil {
|
||||||
|
return nil, fmt.Errorf("oeffentlichen schluessel %q dekodieren: %w", k.Kid, err)
|
||||||
|
}
|
||||||
|
out[k.Kid] = raw
|
||||||
|
}
|
||||||
|
return out, nil
|
||||||
|
}
|
||||||
@@ -0,0 +1,83 @@
|
|||||||
|
// Package moduletrust implementiert Core API-05: asymmetrische JWT-Signatur
|
||||||
|
// mit Schluesselverteilung (JWKS), damit DMS/Mail/Archive/Workflow JWTs
|
||||||
|
// LOKAL verifizieren koennen, ohne pro Aufruf einen synchronen Request an
|
||||||
|
// Core zu stellen — Core darf Fundament sein, ohne zum Flaschenhals zu
|
||||||
|
// werden (siehe Entscheidungsverlauf "Vertrauensstellung Core<->Module" in
|
||||||
|
// nexarch-state.json). IAM-02s HS256-Session-Cookie (Browser-Login) bleibt
|
||||||
|
// unangetastet — dies ist ein zusaetzlicher, getrennter Vertrauensmechanismus
|
||||||
|
// fuer Modul-zu-Modul/Modul-zu-Core-Aufrufe.
|
||||||
|
package moduletrust
|
||||||
|
|
||||||
|
import (
|
||||||
|
"crypto/ed25519"
|
||||||
|
"crypto/rand"
|
||||||
|
"encoding/hex"
|
||||||
|
"fmt"
|
||||||
|
"sync"
|
||||||
|
)
|
||||||
|
|
||||||
|
type KeyPair struct {
|
||||||
|
KID string
|
||||||
|
Private ed25519.PrivateKey
|
||||||
|
Public ed25519.PublicKey
|
||||||
|
}
|
||||||
|
|
||||||
|
// KeyManager haelt ALLE noch gueltigen Schluesselpaare — nicht nur das
|
||||||
|
// aktuell signierende. Rotate erzeugt ein neues Paar und behaelt die alten
|
||||||
|
// fuer die Verifikation bereits ausgestellter Tokens (Akzeptanzkriterium 3:
|
||||||
|
// Rotation ohne Ausfallzeit fuer andere Module).
|
||||||
|
type KeyManager struct {
|
||||||
|
mu sync.RWMutex
|
||||||
|
keys []KeyPair // aeltestes zuerst, neuestes zuletzt
|
||||||
|
}
|
||||||
|
|
||||||
|
func NewKeyManager() (*KeyManager, error) {
|
||||||
|
m := &KeyManager{}
|
||||||
|
if _, err := m.Rotate(); err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
return m, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// Rotate erzeugt ein neues Ed25519-Schluesselpaar mit eigener KID und macht
|
||||||
|
// es zum aktuellen Signierschluessel. Aeltere Schluessel bleiben in
|
||||||
|
// PublicKeySet() erhalten, damit bereits ausgestellte Tokens weiterhin
|
||||||
|
// verifizierbar sind.
|
||||||
|
func (m *KeyManager) Rotate() (KeyPair, error) {
|
||||||
|
pub, priv, err := ed25519.GenerateKey(nil)
|
||||||
|
if err != nil {
|
||||||
|
return KeyPair{}, fmt.Errorf("schluesselpaar erzeugen: %w", err)
|
||||||
|
}
|
||||||
|
kidBytes := make([]byte, 8)
|
||||||
|
if _, err := rand.Read(kidBytes); err != nil {
|
||||||
|
return KeyPair{}, fmt.Errorf("kid erzeugen: %w", err)
|
||||||
|
}
|
||||||
|
kp := KeyPair{KID: hex.EncodeToString(kidBytes), Private: priv, Public: pub}
|
||||||
|
|
||||||
|
m.mu.Lock()
|
||||||
|
m.keys = append(m.keys, kp)
|
||||||
|
m.mu.Unlock()
|
||||||
|
return kp, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// SigningKey liefert den aktuellen (neuesten) Schluessel zum Signieren neuer Tokens.
|
||||||
|
func (m *KeyManager) SigningKey() (KeyPair, error) {
|
||||||
|
m.mu.RLock()
|
||||||
|
defer m.mu.RUnlock()
|
||||||
|
if len(m.keys) == 0 {
|
||||||
|
return KeyPair{}, fmt.Errorf("moduletrust: kein schluessel vorhanden")
|
||||||
|
}
|
||||||
|
return m.keys[len(m.keys)-1], nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// PublicKeySet liefert ALLE bekannten oeffentlichen Schluessel (kid ->
|
||||||
|
// public key) — die Grundlage fuer den JWKS-Endpunkt.
|
||||||
|
func (m *KeyManager) PublicKeySet() map[string]ed25519.PublicKey {
|
||||||
|
m.mu.RLock()
|
||||||
|
defer m.mu.RUnlock()
|
||||||
|
out := make(map[string]ed25519.PublicKey, len(m.keys))
|
||||||
|
for _, k := range m.keys {
|
||||||
|
out[k.KID] = k.Public
|
||||||
|
}
|
||||||
|
return out
|
||||||
|
}
|
||||||
@@ -0,0 +1,214 @@
|
|||||||
|
package moduletrust
|
||||||
|
|
||||||
|
import (
|
||||||
|
"context"
|
||||||
|
"crypto/ed25519"
|
||||||
|
"errors"
|
||||||
|
"net/http"
|
||||||
|
"sync"
|
||||||
|
"testing"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
func TestIssueAndVerify_RoundTrip(t *testing.T) {
|
||||||
|
km, err := NewKeyManager()
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("new key manager: %v", err)
|
||||||
|
}
|
||||||
|
token, err := km.Issue("user-1", "acme", time.Hour)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("issue: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
v := NewVerifier(time.Hour, func(ctx context.Context) (map[string]ed25519.PublicKey, error) {
|
||||||
|
return km.PublicKeySet(), nil
|
||||||
|
})
|
||||||
|
claims, err := v.Verify(context.Background(), token)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("verify: %v", err)
|
||||||
|
}
|
||||||
|
if claims.Subject != "user-1" || claims.TenantSlug != "acme" {
|
||||||
|
t.Fatalf("claims unerwartet: %+v", claims)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Akzeptanzkriterium 1: Verifikation lokal, kein Request pro Aufruf.
|
||||||
|
func TestVerify_DoesNotFetchPerCall(t *testing.T) {
|
||||||
|
km, err := NewKeyManager()
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("new key manager: %v", err)
|
||||||
|
}
|
||||||
|
token, err := km.Issue("user-1", "acme", time.Hour)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("issue: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
var mu sync.Mutex
|
||||||
|
fetchCalls := 0
|
||||||
|
v := NewVerifier(time.Hour, func(ctx context.Context) (map[string]ed25519.PublicKey, error) {
|
||||||
|
mu.Lock()
|
||||||
|
fetchCalls++
|
||||||
|
mu.Unlock()
|
||||||
|
return km.PublicKeySet(), nil
|
||||||
|
})
|
||||||
|
|
||||||
|
for i := 0; i < 10; i++ {
|
||||||
|
if _, err := v.Verify(context.Background(), token); err != nil {
|
||||||
|
t.Fatalf("verify %d: %v", i, err)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
mu.Lock()
|
||||||
|
defer mu.Unlock()
|
||||||
|
if fetchCalls != 1 {
|
||||||
|
t.Fatalf("erwartet genau 1 fetch fuer 10 Verify-Aufrufe innerhalb der TTL, habe %d", fetchCalls)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Akzeptanzkriterium 2 + Pruefung 1: Core simuliert nicht erreichbar,
|
||||||
|
// bereits authentifizierte Nutzer bleiben funktionsfaehig (Fail-Open mit
|
||||||
|
// letztbekanntem Schluesselstand).
|
||||||
|
func TestVerify_FailsOpenWhenCoreUnreachableButStaleKeysExist(t *testing.T) {
|
||||||
|
km, err := NewKeyManager()
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("new key manager: %v", err)
|
||||||
|
}
|
||||||
|
token, err := km.Issue("user-1", "acme", time.Hour)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("issue: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
coreDown := false
|
||||||
|
v := NewVerifier(30*time.Millisecond, func(ctx context.Context) (map[string]ed25519.PublicKey, error) {
|
||||||
|
if coreDown {
|
||||||
|
return nil, errors.New("core nicht erreichbar (simuliert)")
|
||||||
|
}
|
||||||
|
return km.PublicKeySet(), nil
|
||||||
|
})
|
||||||
|
|
||||||
|
// Cache vorwaermen, waehrend Core noch erreichbar ist.
|
||||||
|
if _, err := v.Verify(context.Background(), token); err != nil {
|
||||||
|
t.Fatalf("verify (warm): %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
// "Core abschalten" und TTL ablaufen lassen.
|
||||||
|
coreDown = true
|
||||||
|
time.Sleep(50 * time.Millisecond)
|
||||||
|
|
||||||
|
if _, err := v.Verify(context.Background(), token); err != nil {
|
||||||
|
t.Fatalf("verify sollte trotz core-ausfall mit letztbekanntem stand funktionieren: %v", err)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Akzeptanzkriterium 2 + Pruefung 2: neue sicherheitskritische Aktionen
|
||||||
|
// (z.B. neuer Login) schlagen bei Core-Ausfall klar fehl statt unsicher
|
||||||
|
// durchgelassen zu werden — auch wenn ein (aelterer) Cache-Stand existiert.
|
||||||
|
func TestRequireFreshKeys_FailsClosedWhenCoreUnreachable(t *testing.T) {
|
||||||
|
km, err := NewKeyManager()
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("new key manager: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
coreDown := false
|
||||||
|
v := NewVerifier(time.Hour, func(ctx context.Context) (map[string]ed25519.PublicKey, error) {
|
||||||
|
if coreDown {
|
||||||
|
return nil, errors.New("core nicht erreichbar (simuliert)")
|
||||||
|
}
|
||||||
|
return km.PublicKeySet(), nil
|
||||||
|
})
|
||||||
|
|
||||||
|
// Cache vorwaermen (existiert jetzt ein "veralteter" gueltiger Stand).
|
||||||
|
if _, _, err := v.cache.Get(context.Background()); err != nil {
|
||||||
|
t.Fatalf("warm cache: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
coreDown = true
|
||||||
|
if err := v.RequireFreshKeys(context.Background()); err == nil {
|
||||||
|
t.Fatal("erwartet fehler (fail-closed) bei core-ausfall, habe nil")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Akzeptanzkriterium 3 + Pruefung 3: Schluesselrotation ohne Ausfallzeit —
|
||||||
|
// ein bereits ausgestelltes Token bleibt nach Rotation weiterhin
|
||||||
|
// verifizierbar, ein zweites (simuliertes) Modul bekommt beide Schluessel.
|
||||||
|
func TestRotate_NoDowntimeForAlreadyIssuedTokens(t *testing.T) {
|
||||||
|
km, err := NewKeyManager()
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("new key manager: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
oldToken, err := km.Issue("user-1", "acme", time.Hour)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("issue (alt): %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
if _, err := km.Rotate(); err != nil {
|
||||||
|
t.Fatalf("rotate: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
newToken, err := km.Issue("user-2", "acme", time.Hour)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("issue (neu): %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Simuliertes zweites Modul: fragt den vollstaendigen Schluesselsatz ab.
|
||||||
|
moduleB := NewVerifier(time.Hour, func(ctx context.Context) (map[string]ed25519.PublicKey, error) {
|
||||||
|
return km.PublicKeySet(), nil
|
||||||
|
})
|
||||||
|
|
||||||
|
if _, err := moduleB.Verify(context.Background(), oldToken); err != nil {
|
||||||
|
t.Fatalf("altes token sollte nach rotation weiterhin gueltig sein: %v", err)
|
||||||
|
}
|
||||||
|
if _, err := moduleB.Verify(context.Background(), newToken); err != nil {
|
||||||
|
t.Fatalf("neues token sollte gueltig sein: %v", err)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestVerify_RejectsUnknownKid(t *testing.T) {
|
||||||
|
km1, _ := NewKeyManager()
|
||||||
|
km2, _ := NewKeyManager() // komplett anderer, unbekannter schluessel
|
||||||
|
|
||||||
|
token, err := km1.Issue("user-1", "acme", time.Hour)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("issue: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
v := NewVerifier(time.Hour, func(ctx context.Context) (map[string]ed25519.PublicKey, error) {
|
||||||
|
return km2.PublicKeySet(), nil // kennt km1s schluessel nicht
|
||||||
|
})
|
||||||
|
if _, err := v.Verify(context.Background(), token); !errors.Is(err, ErrInvalidToken) {
|
||||||
|
t.Fatalf("erwartet ErrInvalidToken, habe %v", err)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestJWKSRoundTrip(t *testing.T) {
|
||||||
|
km, _ := NewKeyManager()
|
||||||
|
km.Rotate()
|
||||||
|
|
||||||
|
var buf []byte
|
||||||
|
rec := &captureWriter{}
|
||||||
|
km.ServeJWKS(rec, nil)
|
||||||
|
buf = rec.body
|
||||||
|
|
||||||
|
parsed, err := ParseJWKS(buf)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("parse jwks: %v", err)
|
||||||
|
}
|
||||||
|
if len(parsed) != len(km.PublicKeySet()) {
|
||||||
|
t.Fatalf("erwartet %d schluessel, habe %d", len(km.PublicKeySet()), len(parsed))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
type captureWriter struct {
|
||||||
|
body []byte
|
||||||
|
header http.Header
|
||||||
|
}
|
||||||
|
|
||||||
|
func (w *captureWriter) Header() http.Header {
|
||||||
|
if w.header == nil {
|
||||||
|
w.header = http.Header{}
|
||||||
|
}
|
||||||
|
return w.header
|
||||||
|
}
|
||||||
|
func (w *captureWriter) Write(p []byte) (int, error) { w.body = append(w.body, p...); return len(p), nil }
|
||||||
|
func (w *captureWriter) WriteHeader(statusCode int) {}
|
||||||
@@ -0,0 +1,67 @@
|
|||||||
|
package moduletrust
|
||||||
|
|
||||||
|
import (
|
||||||
|
"context"
|
||||||
|
"crypto/ed25519"
|
||||||
|
"errors"
|
||||||
|
"time"
|
||||||
|
|
||||||
|
"github.com/golang-jwt/jwt/v5"
|
||||||
|
)
|
||||||
|
|
||||||
|
var ErrInvalidToken = errors.New("moduletrust: ungueltiges token")
|
||||||
|
|
||||||
|
// KeyFetchFunc holt den aktuellen Schluesselsatz von Core (z.B. per HTTP-GET
|
||||||
|
// auf ServeJWKS + ParseJWKS). Wird vom Verifier nur bei abgelaufener TTL
|
||||||
|
// aufgerufen — NICHT bei jeder Verify()-Anfrage (Akzeptanzkriterium 1).
|
||||||
|
type KeyFetchFunc func(ctx context.Context) (map[string]ed25519.PublicKey, error)
|
||||||
|
|
||||||
|
// Verifier ist die Modulseite von API-05: verifiziert JWTs LOKAL gegen einen
|
||||||
|
// per StaleCache zwischengespeicherten Schluesselsatz, ohne pro Aufruf einen
|
||||||
|
// synchronen Request an Core zu stellen.
|
||||||
|
type Verifier struct {
|
||||||
|
cache *StaleCache[map[string]ed25519.PublicKey]
|
||||||
|
}
|
||||||
|
|
||||||
|
func NewVerifier(ttl time.Duration, fetch KeyFetchFunc) *Verifier {
|
||||||
|
return &Verifier{cache: NewStaleCache(ttl, func(ctx context.Context) (map[string]ed25519.PublicKey, error) {
|
||||||
|
return fetch(ctx)
|
||||||
|
})}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Verify prueft die Signatur LOKAL gegen den (ggf. abgelaufenen, aber
|
||||||
|
// vorhandenen) Schluesselsatz — FAIL-OPEN fuer bereits ausgestellte Tokens
|
||||||
|
// (Akzeptanzkriterium 2): ist Core nicht erreichbar, aber ein alter
|
||||||
|
// Schluesselsatz bekannt, wird damit weiter verifiziert.
|
||||||
|
func (v *Verifier) Verify(ctx context.Context, tokenString string) (*Claims, error) {
|
||||||
|
keys, _, err := v.cache.Get(ctx)
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
claims := &Claims{}
|
||||||
|
token, err := jwt.ParseWithClaims(tokenString, claims, func(t *jwt.Token) (interface{}, error) {
|
||||||
|
if _, ok := t.Method.(*jwt.SigningMethodEd25519); !ok {
|
||||||
|
return nil, ErrInvalidToken
|
||||||
|
}
|
||||||
|
kid, _ := t.Header["kid"].(string)
|
||||||
|
pub, ok := keys[kid]
|
||||||
|
if !ok {
|
||||||
|
return nil, ErrInvalidToken
|
||||||
|
}
|
||||||
|
return pub, nil
|
||||||
|
})
|
||||||
|
if err != nil || !token.Valid {
|
||||||
|
return nil, ErrInvalidToken
|
||||||
|
}
|
||||||
|
return claims, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// RequireFreshKeys ruft IMMER frisch von Core ab (FAIL-CLOSED) — fuer
|
||||||
|
// sicherheitskritische Aktionen wie einen komplett neuen Login
|
||||||
|
// (Akzeptanzkriterium 2): schlaegt klar fehl, wenn Core nicht erreichbar
|
||||||
|
// ist, statt auf einem veralteten Schluesselsatz zu vertrauen.
|
||||||
|
func (v *Verifier) RequireFreshKeys(ctx context.Context) error {
|
||||||
|
_, err := v.cache.RequireFresh(ctx)
|
||||||
|
return err
|
||||||
|
}
|
||||||
@@ -1,78 +0,0 @@
|
|||||||
// 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
|
|
||||||
}
|
|
||||||
@@ -1,69 +0,0 @@
|
|||||||
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)
|
|
||||||
}
|
|
||||||
@@ -1,172 +0,0 @@
|
|||||||
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
|
|
||||||
}
|
|
||||||
@@ -1,76 +0,0 @@
|
|||||||
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
|
|
||||||
}
|
|
||||||
@@ -1,68 +0,0 @@
|
|||||||
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)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
@@ -1,70 +0,0 @@
|
|||||||
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
|
|
||||||
}
|
|
||||||
@@ -1,184 +0,0 @@
|
|||||||
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)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
@@ -1,71 +0,0 @@
|
|||||||
// 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
|
|
||||||
}
|
|
||||||
@@ -1,124 +0,0 @@
|
|||||||
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()
|
|
||||||
}
|
|
||||||
@@ -1,90 +0,0 @@
|
|||||||
// 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
|
|
||||||
}
|
|
||||||
@@ -1,66 +0,0 @@
|
|||||||
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)
|
|
||||||
}
|
|
||||||
@@ -1,227 +0,0 @@
|
|||||||
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
|
|
||||||
}
|
|
||||||
@@ -1,107 +0,0 @@
|
|||||||
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
|
|
||||||
}
|
|
||||||
@@ -1,123 +0,0 @@
|
|||||||
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")
|
|
||||||
}
|
|
||||||
}
|
|
||||||
@@ -1,2 +0,0 @@
|
|||||||
DROP TABLE IF EXISTS role_assignment_history;
|
|
||||||
DROP TABLE IF EXISTS role_assignments;
|
|
||||||
@@ -1,23 +0,0 @@
|
|||||||
-- 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);
|
|
||||||
@@ -1,2 +0,0 @@
|
|||||||
DROP TABLE IF EXISTS ldap_group_role_mapping;
|
|
||||||
DROP TABLE IF EXISTS ldap_config;
|
|
||||||
@@ -1,22 +0,0 @@
|
|||||||
-- 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'))
|
|
||||||
);
|
|
||||||
@@ -1 +0,0 @@
|
|||||||
DROP TABLE IF EXISTS oidc_states;
|
|
||||||
@@ -1,10 +0,0 @@
|
|||||||
-- 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()
|
|
||||||
);
|
|
||||||
@@ -1 +0,0 @@
|
|||||||
DROP TABLE IF EXISTS saml_config;
|
|
||||||
@@ -1,13 +0,0 @@
|
|||||||
-- 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()
|
|
||||||
);
|
|
||||||
@@ -1,11 +1,16 @@
|
|||||||
#!/usr/bin/env bash
|
#!/usr/bin/env bash
|
||||||
set -euo pipefail
|
set -euo pipefail
|
||||||
|
|
||||||
PASS="${NEXARCH_TEST_DB_PASSWORD:?Setze NEXARCH_TEST_DB_PASSWORD vor dem Aufruf}"
|
PASS="${NEXARCH_TEST_DB_PASSWORD:?Setze NEXARCH_TEST_DB_PASSWORD vor dem Aufruf}"
|
||||||
ROLE="nexarch_test"
|
ROLE="nexarch_test"
|
||||||
|
|
||||||
export PGPASSWORD="$PASS"
|
export PGPASSWORD="$PASS"
|
||||||
|
|
||||||
psql -h localhost -U "$ROLE" -d postgres -v ON_ERROR_STOP=1 -c "DROP TABLE IF EXISTS tenants CASCADE;"
|
psql -h localhost -U "$ROLE" -d postgres -v ON_ERROR_STOP=1 -c "DROP TABLE IF EXISTS tenants CASCADE;"
|
||||||
|
|
||||||
dbs=$(psql -h localhost -U "$ROLE" -d postgres -tAc "SELECT datname FROM pg_database WHERE datname LIKE 'tenant\_%' ESCAPE '\'")
|
dbs=$(psql -h localhost -U "$ROLE" -d postgres -tAc "SELECT datname FROM pg_database WHERE datname LIKE 'tenant\_%' ESCAPE '\'")
|
||||||
for db in $dbs; do
|
for db in $dbs; do
|
||||||
psql -h localhost -U "$ROLE" -d postgres -v ON_ERROR_STOP=1 -c "DROP DATABASE IF EXISTS \"${db}\";"
|
psql -h localhost -U "$ROLE" -d postgres -v ON_ERROR_STOP=1 -c "DROP DATABASE IF EXISTS \"${db}\";"
|
||||||
done
|
done
|
||||||
|
|
||||||
echo "Testumgebung zurueckgesetzt: registry-tabelle + $(echo "$dbs" | grep -c . || true) tenant-datenbank(en) entfernt."
|
echo "Testumgebung zurueckgesetzt: registry-tabelle + $(echo "$dbs" | grep -c . || true) tenant-datenbank(en) entfernt."
|
||||||
|
|||||||
@@ -1,12 +1,18 @@
|
|||||||
#!/usr/bin/env bash
|
#!/usr/bin/env bash
|
||||||
set -euo pipefail
|
set -euo pipefail
|
||||||
|
|
||||||
PASS="${NEXARCH_TEST_DB_PASSWORD:?Setze NEXARCH_TEST_DB_PASSWORD vor dem Aufruf}"
|
PASS="${NEXARCH_TEST_DB_PASSWORD:?Setze NEXARCH_TEST_DB_PASSWORD vor dem Aufruf}"
|
||||||
cd "$(dirname "$0")/.."
|
cd "$(dirname "$0")/.."
|
||||||
|
|
||||||
NEXARCH_TEST_DB_PASSWORD="$PASS" bash scripts/reset-test-env.sh
|
NEXARCH_TEST_DB_PASSWORD="$PASS" bash scripts/reset-test-env.sh
|
||||||
|
|
||||||
export TEST_ADMIN_DSN="postgresql://nexarch_test:${PASS}@localhost:5432/postgres?sslmode=disable"
|
export TEST_ADMIN_DSN="postgresql://nexarch_test:${PASS}@localhost:5432/postgres?sslmode=disable"
|
||||||
|
|
||||||
echo "== go build =="
|
echo "== go build =="
|
||||||
go build ./...
|
go build ./...
|
||||||
|
|
||||||
echo "== go vet =="
|
echo "== go vet =="
|
||||||
go vet ./...
|
go vet ./...
|
||||||
|
|
||||||
echo "== go test (-p 1) =="
|
echo "== go test (-p 1) =="
|
||||||
go test ./... -p 1 -count=1
|
go test ./... -p 1 -count=1
|
||||||
|
|||||||
Reference in New Issue
Block a user