feat: role-based access via Zitadel project roles

Replace the ALLOWED_USER_IDS sub-allowlist with a Zitadel project role
check: tokens must carry the role from REQUIRED_ROLE (default "user")
in the urn:zitadel:iam:org:project[:id]:roles claim. Roles are granted
per account in Zitadel (project ClaudeDo), where access is now managed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.env.example

@@ -6,8 +6,8 @@ DATABASE_URL=postgres://mika:CHANGEME@l8kogcggsc80sgcgk8kswww4:5432/claudedo
 ZITADEL_ISSUER=https://auth.kuns.dev
 # Comma-separated accepted audiences: web client id, desktop client id, project id
 ZITADEL_AUDIENCE=
-# Comma-separated owner Zitadel user ids (the single owner's `sub`)
-ALLOWED_USER_IDS=
+# Zitadel project role required for API access (default: user)
+REQUIRED_ROLE=user
 # CORS: the web client origin (the app's own origin)
 WEB_ORIGIN=https://claudedo.kuns.dev
 

README.md

@@ -83,7 +83,7 @@ Server-only values are read from `process.env` at runtime (set them in Coolify):
 | `DATABASE_URL` | `postgres://mika:…@l8kogcggsc80sgcgk8kswww4:5432/claudedo` (shared PG, internal host) |
 | `ZITADEL_ISSUER` | `https://auth.kuns.dev` |
 | `ZITADEL_AUDIENCE` | accepted audiences (CSV): web id, desktop id, project id |
-| `ALLOWED_USER_IDS` | owner `sub` allowlist (CSV) |
+| `REQUIRED_ROLE` | Zitadel project role required for API access (default `user`; grant it to accounts in Zitadel) |
 | `WEB_ORIGIN` | CORS allowed origin (`https://claudedo.kuns.dev`) |
 
 Public web-client config is **baked at build time** (non-secret) via Dockerfile build args

scripts/provision-zitadel.ts

@@ -148,7 +148,7 @@ try {
     humans[0] ??
     owner;
 } catch (e) {
-  console.error(`\n(could not list users: ${(e as Error).message}) — set ALLOWED_USER_IDS manually`);
+  console.error(`\n(could not list users: ${(e as Error).message}) — grant the "user" project role manually`);
 }
 
 const result = {
@@ -159,7 +159,8 @@ const result = {
   ownerUserName: owner.userName,
   env: {
     ZITADEL_AUDIENCE: [webClientId, desktopClientId, projectId].filter(Boolean).join(","),
-    ALLOWED_USER_IDS: owner.id,
+    // Access is role-based: grant the project role below to each allowed account in Zitadel.
+    REQUIRED_ROLE: "user",
     NUXT_PUBLIC_ZITADEL_CLIENT_ID: webClientId,
     PROJECT_AUDIENCE_SCOPE: `urn:zitadel:iam:org:project:id:${projectId}:aud`,
   },

server/middleware/1.auth.ts

@@ -27,14 +27,15 @@ export default defineEventHandler(async (event) => {
       let claims: Record<string, unknown> = {};
       try {
         const c = decodeJwt(token);
-        claims = { iss: c.iss, sub: c.sub, aud: c.aud, azp: c.azp, exp: c.exp, alg_present: true };
+        const roleClaims = Object.keys(c).filter((k) => k.includes(":project:") && k.endsWith(":roles"));
+        claims = { iss: c.iss, sub: c.sub, aud: c.aud, azp: c.azp, exp: c.exp, roleClaims, alg_present: true };
       } catch (de) {
         claims = { not_a_jwt: String(de).slice(0, 80) };
       }
       console.error(
         "[auth] verify failed:", (e as Error).message,
         "| claims:", JSON.stringify(claims),
-        "| ALLOWED_USER_IDS:", process.env.ALLOWED_USER_IDS,
+        "| REQUIRED_ROLE:", process.env.REQUIRED_ROLE || "user",
         "| ZITADEL_AUDIENCE:", process.env.ZITADEL_AUDIENCE,
       );
     }

server/utils/auth.ts

@@ -6,15 +6,31 @@ export interface VerifierConfig {
   issuer: string;
   /** Token is accepted if its `aud` includes at least one of these. */
   audiences: string[];
-  /** Token `sub` must be one of these (the single owner). */
-  allowedSubs: string[];
+  /** Token must carry this Zitadel project role (granted in Zitadel, asserted into the access token). */
+  requiredRole: string;
   /** Test seam: resolve the verification key directly instead of fetching JWKS. */
   keyResolver?: (token: string) => Promise<KeyInput>;
 }
 
+/**
+ * Zitadel asserts project roles into JWT access tokens as
+ * `urn:zitadel:iam:org:project:roles` (and a `…:project:<id>:roles` variant),
+ * each an object keyed by role key.
+ */
+export function rolesFromClaims(payload: JWTPayload): Set<string> {
+  const roles = new Set<string>();
+  for (const [claim, value] of Object.entries(payload)) {
+    if (!/^urn:zitadel:iam:org:project:(\d+:)?roles$/.test(claim)) continue;
+    if (value && typeof value === "object" && !Array.isArray(value)) {
+      for (const role of Object.keys(value)) roles.add(role);
+    }
+  }
+  return roles;
+}
+
 /**
  * Build a Zitadel access-token verifier. Verifies signature + issuer + expiry via JWKS,
- * then enforces audience and owner-sub allowlists. Throws on any failure.
+ * then enforces the audience and the required project role. Throws on any failure.
  */
 export function makeVerifier(cfg: VerifierConfig) {
   const jwks: JWTVerifyGetKey | null = cfg.keyResolver
@@ -29,8 +45,8 @@ export function makeVerifier(cfg: VerifierConfig) {
     if (!cfg.audiences.some((a) => aud.includes(a))) {
       throw new Error("token audience not accepted");
     }
-    if (!cfg.allowedSubs.includes(String(payload.sub))) {
-      throw new Error("subject not allowed");
+    if (!rolesFromClaims(payload).has(cfg.requiredRole)) {
+      throw new Error(`required role "${cfg.requiredRole}" not granted`);
     }
     return payload;
   };
@@ -51,7 +67,7 @@ export function getVerifier() {
     _cached = makeVerifier({
       issuer: process.env.ZITADEL_ISSUER || "https://auth.kuns.dev",
       audiences: splitCsv(process.env.ZITADEL_AUDIENCE),
-      allowedSubs: splitCsv(process.env.ALLOWED_USER_IDS),
+      requiredRole: process.env.REQUIRED_ROLE || "user",
     });
   }
   return _cached;

tests/auth.test.ts

@@ -1,15 +1,17 @@
 import { describe, expect, it } from "vitest";
 import { SignJWT, generateKeyPair } from "jose";
-import { makeVerifier } from "../server/utils/auth";
+import { makeVerifier, rolesFromClaims } from "../server/utils/auth";
 
 const ISS = "https://auth.kuns.dev";
+const ROLES_CLAIM = "urn:zitadel:iam:org:project:roles";
+const SCOPED_ROLES_CLAIM = "urn:zitadel:iam:org:project:376787351902355727:roles";
 
 async function setup() {
   const { publicKey, privateKey } = await generateKeyPair("RS256");
   const verify = makeVerifier({
     issuer: ISS,
     audiences: ["aud-web", "proj-1"],
-    allowedSubs: ["owner-1"],
+    requiredRole: "user",
     keyResolver: async () => publicKey,
   });
   const sign = (claims: Record<string, unknown>) =>
@@ -23,27 +25,33 @@ async function setup() {
 }
 
 describe("token verification", () => {
-  it("accepts an owner token with a valid audience", async () => {
+  it("accepts a token with the user role and a valid audience", async () => {
     const { verify, sign } = await setup();
-    const t = await sign({ sub: "owner-1", aud: ["aud-web"] });
-    await expect(verify(t)).resolves.toMatchObject({ sub: "owner-1" });
+    const t = await sign({ sub: "u1", aud: ["aud-web"], [ROLES_CLAIM]: { user: { org: "kuns.dev" } } });
+    await expect(verify(t)).resolves.toMatchObject({ sub: "u1" });
   });
 
-  it("accepts when aud is a single string in the allowed set", async () => {
+  it("accepts the role from the project-scoped claim variant", async () => {
     const { verify, sign } = await setup();
-    const t = await sign({ sub: "owner-1", aud: "proj-1" });
-    await expect(verify(t)).resolves.toMatchObject({ sub: "owner-1" });
+    const t = await sign({ sub: "u1", aud: "proj-1", [SCOPED_ROLES_CLAIM]: { user: { org: "kuns.dev" } } });
+    await expect(verify(t)).resolves.toMatchObject({ sub: "u1" });
   });
 
-  it("rejects a non-owner sub", async () => {
+  it("rejects a token without the required role", async () => {
     const { verify, sign } = await setup();
-    const t = await sign({ sub: "intruder", aud: ["aud-web"] });
-    await expect(verify(t)).rejects.toThrow();
+    const t = await sign({ sub: "u1", aud: ["aud-web"] });
+    await expect(verify(t)).rejects.toThrow(/required role/);
+  });
+
+  it("rejects a token whose roles do not include the required one", async () => {
+    const { verify, sign } = await setup();
+    const t = await sign({ sub: "u1", aud: ["aud-web"], [ROLES_CLAIM]: { viewer: { org: "kuns.dev" } } });
+    await expect(verify(t)).rejects.toThrow(/required role/);
   });
 
   it("rejects a token with no accepted audience", async () => {
     const { verify, sign } = await setup();
-    const t = await sign({ sub: "owner-1", aud: ["other"] });
+    const t = await sign({ sub: "u1", aud: ["other"], [ROLES_CLAIM]: { user: { org: "kuns.dev" } } });
     await expect(verify(t)).rejects.toThrow();
   });
 
@@ -52,10 +60,10 @@ describe("token verification", () => {
     const verify = makeVerifier({
       issuer: ISS,
       audiences: ["aud-web"],
-      allowedSubs: ["owner-1"],
+      requiredRole: "user",
       keyResolver: async () => publicKey,
     });
-    const t = await new SignJWT({ sub: "owner-1", aud: ["aud-web"] })
+    const t = await new SignJWT({ sub: "u1", aud: ["aud-web"], [ROLES_CLAIM]: { user: {} } })
       .setProtectedHeader({ alg: "RS256" })
       .setIssuer("https://evil.example")
       .setExpirationTime("5m")
@@ -63,3 +71,22 @@ describe("token verification", () => {
     await expect(verify(t)).rejects.toThrow();
   });
 });
+
+describe("rolesFromClaims", () => {
+  it("merges generic and project-scoped role claims", () => {
+    const roles = rolesFromClaims({
+      [ROLES_CLAIM]: { user: {} },
+      [SCOPED_ROLES_CLAIM]: { admin: {} },
+    });
+    expect(roles).toEqual(new Set(["user", "admin"]));
+  });
+
+  it("ignores malformed role claims and unrelated keys", () => {
+    const roles = rolesFromClaims({
+      [ROLES_CLAIM]: "not-an-object",
+      "urn:zitadel:iam:org:project:roles:extra": { nope: {} },
+      sub: "u1",
+    } as never);
+    expect(roles.size).toBe(0);
+  });
+});