Fix OIDC email: load Authelia profile from UserInfo

Auth.js OIDC only reads ID-token claims by default; Authelia puts
email on UserInfo. Set idToken:false, harden claim extraction, and
document an optional Authelia claims_policy.

.env.example

@@ -1,4 +1,10 @@
 AUTH_SECRET=change-me-to-a-long-random-string
+
+# Public URL of this app (important behind reverse proxies / Docker)
+# Example: http://localhost:3000 or https://rfid.example.com
+# AUTH_URL=http://localhost:3000
+# AUTH_TRUST_HOST=true
+
 # Optional: path to SQLite file (default ./data/rfid.db)
 # RFID_DB_PATH=./data/rfid.db
 
@@ -10,10 +16,20 @@ AUTH_SECRET=change-me-to-a-long-random-string
 # CREATE_USER_PASSWORD=changeme
 # CREATE_USER_NAME=Admin
 
-# Optional OIDC (Authentik, Keycloak, Authelia, etc.)
+# Optional OIDC (Authentik, Keycloak, Authelia, Google, etc.)
+# Setting these three enables the "Sign in with SSO" button automatically
+# (no NEXT_PUBLIC_* flag needed).
+#
+# In your IdP, create a confidential OIDC client with redirect URI:
+#   {AUTH_URL}/api/auth/callback/oidc
+# e.g. http://localhost:3000/api/auth/callback/oidc
+#
+# AUTH_OIDC_ISSUER must be the issuer that serves
+#   {issuer}/.well-known/openid-configuration
+# Authentik example: https://sso.example.com/application/o/rfid/
+# Keycloak example:  https://sso.example.com/realms/myrealm
+#
 # AUTH_OIDC_ISSUER=https://sso.example.com/application/o/rfid/
 # AUTH_OIDC_CLIENT_ID=
 # AUTH_OIDC_CLIENT_SECRET=
-# AUTH_OIDC_NAME=SSO
-# NEXT_PUBLIC_AUTH_OIDC_ENABLED=1
-# NEXT_PUBLIC_AUTH_OIDC_NAME=SSO
+# AUTH_OIDC_NAME=Authentik

.github/workflows/ci.yml

@@ -22,11 +22,3 @@ jobs:
       - run: npm run build
         env:
           AUTH_SECRET: ci-build-secret-at-least-32-characters
-
-  docker:
-    name: docker-build
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Build production image
-        run: docker build -t rfid-database:ci .

.github/workflows/docker.yml

@@ -0,0 +1,60 @@
+name: Docker
+
+on:
+  push:
+    branches: [main]
+    tags: ["v*"]
+  pull_request:
+    branches: [main]
+
+env:
+  REGISTRY: ghcr.io
+  # GHCR requires lowercase image names
+  IMAGE_NAME: ghcr.io/chewbaccalakis/rfid-database
+
+jobs:
+  build-and-push:
+    name: build-and-push
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels)
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=sha,prefix=sha-,format=short
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

README.md

@@ -30,13 +30,65 @@ Open http://localhost:3000 and sign in.
 | Variable | Required | Description |
 |----------|----------|-------------|
 | `AUTH_SECRET` | yes | NextAuth secret |
+| `AUTH_URL` | recommended | Public app URL (e.g. `https://rfid.example.com`) |
 | `RFID_DB_PATH` | no | SQLite path (default `./data/rfid.db`) |
-| `AUTH_OIDC_ISSUER` | no | OIDC issuer URL |
-| `AUTH_OIDC_CLIENT_ID` | no | OIDC client id |
-| `AUTH_OIDC_CLIENT_SECRET` | no | OIDC client secret |
-| `AUTH_OIDC_NAME` | no | Button label (default `SSO`) |
-| `NEXT_PUBLIC_AUTH_OIDC_ENABLED` | no | Set `1` to show SSO button |
-| `NEXT_PUBLIC_AUTH_OIDC_NAME` | no | Public SSO button label |
+| `AUTH_OIDC_ISSUER` | for OIDC | Issuer URL (must expose `/.well-known/openid-configuration`) |
+| `AUTH_OIDC_CLIENT_ID` | for OIDC | OIDC client id |
+| `AUTH_OIDC_CLIENT_SECRET` | for OIDC | OIDC client secret |
+| `AUTH_OIDC_NAME` | no | SSO button label (default `SSO`) |
+
+### Enabling OIDC
+
+1. **Pull latest and rebuild** (OIDC button detection changed recently):
+   ```bash
+   git pull
+   docker compose up -d --build
+   ```
+2. In your IdP, create a **confidential** OIDC application.
+3. Set the redirect / callback URI to **exactly**:
+   ```
+   {AUTH_URL}/api/auth/callback/oidc
+   ```
+   Example: `https://rfid.atlashorizon.net/api/auth/callback/oidc`
+4. Put these in `.env`:
+   ```bash
+   AUTH_URL=https://rfid.atlashorizon.net
+   AUTH_SECRET=...long random...
+   AUTH_OIDC_ISSUER=https://auth.atlashorizon.net
+   AUTH_OIDC_CLIENT_ID=rfiddb
+   AUTH_OIDC_CLIENT_SECRET=...
+   AUTH_OIDC_NAME=AtlasHorizon
+   ```
+5. Restart, then verify the running app sees config (no secrets returned):
+   ```bash
+   curl -s https://rfid.atlashorizon.net/api/v1/auth/config | jq
+   ```
+   You want `"oidcEnabled": true` and `"callbackUrl"` matching your IdP.
+6. Open `/login` — you should see **Sign in with AtlasHorizon**.
+
+Notes:
+- `AUTH_OIDC_ISSUER` must match discovery (`{issuer}/.well-known/openid-configuration`).
+- The app requests `openid email profile` and loads profile from **UserInfo** (Authelia puts `email` there by default).
+- Optional Authelia hardening — also put email on the ID token:
+
+```yaml
+identity_providers:
+  oidc:
+    claims_policies:
+      rfiddb:
+        id_token:
+          - 'email'
+          - 'email_verified'
+          - 'preferred_username'
+          - 'name'
+    clients:
+      - client_id: 'rfiddb'
+        claims_policy: 'rfiddb'
+        # ...rest of client...
+```
+
+- Local password login stays available alongside SSO.
+- If the button is missing, you are almost certainly on an old image — rebuild.
 
 ## REST API (`/api/v1`)
 
@@ -83,10 +135,26 @@ npm run typecheck
 npm run build
 ```
 
-GitHub Actions runs on every pull request and push to `main`:
+GitHub Actions on every pull request and push to `main`:
 
 1. **lint / typecheck / test / Next.js build**
-2. **`docker build`** — catches Dockerfile parse/build failures (the class of break that conflict markers previously caused)
+2. **Docker image** — build on PRs; on `main` (and `v*` tags) push to GHCR:
+   `ghcr.io/chewbaccalakis/rfid-database`
+
+### Pull the published image
+
+```bash
+docker pull ghcr.io/chewbaccalakis/rfid-database:latest
+# or a specific commit: ghcr.io/chewbaccalakis/rfid-database:sha-<shortsha>
+```
+
+If the package is private, authenticate first:
+
+```bash
+echo $GITHUB_TOKEN | docker login ghcr.io -u USERNAME --password-stdin
+```
+
+Or in Compose, set `image: ghcr.io/chewbaccalakis/rfid-database:latest` and comment out `build:`.
 
 ## Docker
 

docker-compose.yml

@@ -1,9 +1,13 @@
 services:
   rfid-database:
+    # Local build (default):
     build:
       context: .
       dockerfile: Dockerfile
     image: rfid-database:local
+    # Or pull from GHCR instead of building:
+    # image: ghcr.io/chewbaccalakis/rfid-database:latest
+    # pull_policy: always
     container_name: rfid-database
     restart: unless-stopped
     ports:
@@ -16,15 +20,12 @@ services:
       PORT: "3000"
       HOSTNAME: 0.0.0.0
       AUTH_TRUST_HOST: "true"
+      # OIDC: set AUTH_OIDC_ISSUER / CLIENT_ID / CLIENT_SECRET (and AUTH_URL)
+      # in .env — the login page picks them up at runtime.
       # Optional bootstrap (only creates if missing):
       # CREATE_USER_EMAIL: [email protected]
       # CREATE_USER_PASSWORD: change-me
       # CREATE_USER_NAME: Admin
-      # Optional OIDC — also set NEXT_PUBLIC_* in .env if using SSO button
-      # AUTH_OIDC_ISSUER: ${AUTH_OIDC_ISSUER:-}
-      # AUTH_OIDC_CLIENT_ID: ${AUTH_OIDC_CLIENT_ID:-}
-      # AUTH_OIDC_CLIENT_SECRET: ${AUTH_OIDC_CLIENT_SECRET:-}
-      # AUTH_OIDC_NAME: ${AUTH_OIDC_NAME:-SSO}
     volumes:
       - rfid-data:/data
     healthcheck:

src/app/api/v1/auth/config/route.ts

@@ -0,0 +1,30 @@
+import { jsonOk } from "@/lib/api/errors";
+import { isOidcConfigured } from "@/lib/auth/oidc";
+
+/**
+ * Public auth diagnostics (no secrets).
+ * Useful to verify the running container sees OIDC env vars.
+ */
+export async function GET() {
+  const authUrl = (process.env.AUTH_URL || "").replace(/\/$/, "");
+  const oidcEnabled = isOidcConfigured();
+
+  return jsonOk({
+    oidcEnabled,
+    oidcName: process.env.AUTH_OIDC_NAME || "SSO",
+    issuer: process.env.AUTH_OIDC_ISSUER || null,
+    clientIdSet: Boolean(process.env.AUTH_OIDC_CLIENT_ID?.trim()),
+    clientSecretSet: Boolean(process.env.AUTH_OIDC_CLIENT_SECRET?.trim()),
+    authUrl: authUrl || null,
+    authSecretSet: Boolean(
+      process.env.AUTH_SECRET?.trim() &&
+        process.env.AUTH_SECRET !== "change-me-to-a-long-random-string"
+    ),
+    callbackUrl: authUrl
+      ? `${authUrl}/api/auth/callback/oidc`
+      : "/api/auth/callback/oidc",
+    hint: oidcEnabled
+      ? "OIDC looks configured. Register callbackUrl exactly in your IdP."
+      : "Set AUTH_OIDC_ISSUER, AUTH_OIDC_CLIENT_ID, and AUTH_OIDC_CLIENT_SECRET, then restart.",
+  });
+}

src/app/login/page.tsx

@@ -1,95 +1,15 @@
-"use client";
+import { isOidcConfigured } from "@/lib/auth/oidc";
+import { LoginPageClient } from "@/components/LoginPageClient";
 
-import { FormEvent, useState } from "react";
-import { signIn } from "next-auth/react";
-import { useRouter, useSearchParams } from "next/navigation";
-import { Suspense } from "react";
-
-function LoginForm() {
-  const router = useRouter();
-  const params = useSearchParams();
-  const callbackUrl = params.get("callbackUrl") || "/";
-  const [email, setEmail] = useState("");
-  const [password, setPassword] = useState("");
-  const [error, setError] = useState<string | null>(null);
-  const [loading, setLoading] = useState(false);
-  const oidcName = process.env.NEXT_PUBLIC_AUTH_OIDC_NAME || "SSO";
-  const oidcEnabled = process.env.NEXT_PUBLIC_AUTH_OIDC_ENABLED === "1";
-
-  async function onSubmit(e: FormEvent) {
-    e.preventDefault();
-    setLoading(true);
-    setError(null);
-    const res = await signIn("credentials", {
-      email,
-      password,
-      redirect: false,
-      callbackUrl,
-    });
-    setLoading(false);
-    if (res?.error) {
-      setError("Invalid email or password");
-      return;
-    }
-    router.push(callbackUrl);
-    router.refresh();
-  }
-
-  return (
-    <div style={{ maxWidth: 400, margin: "3rem auto" }}>
-      <h1 className="page-title">RFID Database</h1>
-      <p className="page-sub">Sign in to manage site tag dumps</p>
-      {error && <div className="error-banner">{error}</div>}
-      <form className="panel stack" onSubmit={onSubmit}>
-        <div className="field">
-          <label className="label" htmlFor="email">
-            Email
-          </label>
-          <input
-            id="email"
-            className="input"
-            type="email"
-            autoComplete="username"
-            value={email}
-            onChange={(e) => setEmail(e.target.value)}
-            required
-          />
-        </div>
-        <div className="field">
-          <label className="label" htmlFor="password">
-            Password
-          </label>
-          <input
-            id="password"
-            className="input"
-            type="password"
-            autoComplete="current-password"
-            value={password}
-            onChange={(e) => setPassword(e.target.value)}
-            required
-          />
-        </div>
-        <button className="btn" type="submit" disabled={loading}>
-          {loading ? "Signing in…" : "Sign in"}
-        </button>
-        {oidcEnabled && (
-          <button
-            type="button"
-            className="btn btn-secondary"
-            onClick={() => signIn("oidc", { callbackUrl })}
-          >
-            Sign in with {oidcName}
-          </button>
-        )}
-      </form>
-    </div>
-  );
-}
+// OIDC env is only available at runtime (Docker). Never prerender this page
+// at build time or the SSO button stays permanently hidden.
+export const dynamic = "force-dynamic";
 
 export default function LoginPage() {
   return (
-    <Suspense>
-      <LoginForm />
-    </Suspense>
+    <LoginPageClient
+      oidcEnabled={isOidcConfigured()}
+      oidcName={process.env.AUTH_OIDC_NAME || "SSO"}
+    />
   );
 }

src/components/LoginPageClient.tsx

@@ -0,0 +1,140 @@
+"use client";
+
+import { FormEvent, useEffect, useState } from "react";
+import { signIn } from "next-auth/react";
+import { useRouter, useSearchParams } from "next/navigation";
+import { Suspense } from "react";
+
+type Props = {
+  oidcEnabled: boolean;
+  oidcName: string;
+};
+
+type AuthConfig = {
+  oidcEnabled: boolean;
+  oidcName: string;
+};
+
+function authErrorMessage(code: string | null): string | null {
+  if (!code) return null;
+  switch (code) {
+    case "EmailRequired":
+      return "Your IdP did not return an email claim. Enable the email scope/claim for this OIDC client.";
+    case "OAuthCallbackError":
+    case "Callback":
+      return "OIDC callback failed. Check redirect URI, client secret, and container logs.";
+    case "OAuthSignin":
+      return "Could not start OIDC login. Check AUTH_OIDC_ISSUER discovery and client id.";
+    case "Configuration":
+      return "Auth configuration error. Verify AUTH_SECRET, AUTH_URL, and OIDC env vars.";
+    case "AccessDenied":
+      return "Access denied by the identity provider.";
+    default:
+      return `Sign-in error: ${code}`;
+  }
+}
+
+function LoginForm({ oidcEnabled, oidcName }: Props) {
+  const router = useRouter();
+  const params = useSearchParams();
+  const callbackUrl = params.get("callbackUrl") || "/";
+  const [email, setEmail] = useState("");
+  const [password, setPassword] = useState("");
+  const [error, setError] = useState<string | null>(
+    authErrorMessage(params.get("error"))
+  );
+  const [loading, setLoading] = useState(false);
+  const [runtimeOidc, setRuntimeOidc] = useState<AuthConfig | null>(null);
+
+  // Belt-and-suspenders: ask the live API so a stale static shell can't hide SSO
+  useEffect(() => {
+    fetch("/api/v1/auth/config")
+      .then((r) => (r.ok ? r.json() : null))
+      .then((data: AuthConfig | null) => {
+        if (data) setRuntimeOidc(data);
+      })
+      .catch(() => {
+        /* ignore */
+      });
+  }, []);
+
+  const showOidc = runtimeOidc?.oidcEnabled ?? oidcEnabled;
+  const displayName = runtimeOidc?.oidcName || oidcName;
+
+  async function onSubmit(e: FormEvent) {
+    e.preventDefault();
+    setLoading(true);
+    setError(null);
+    const res = await signIn("credentials", {
+      email,
+      password,
+      redirect: false,
+      callbackUrl,
+    });
+    setLoading(false);
+    if (res?.error) {
+      setError("Invalid email or password");
+      return;
+    }
+    router.push(callbackUrl);
+    router.refresh();
+  }
+
+  return (
+    <div style={{ maxWidth: 400, margin: "3rem auto" }}>
+      <h1 className="page-title">RFID Database</h1>
+      <p className="page-sub">Sign in to manage site tag dumps</p>
+      {error && <div className="error-banner">{error}</div>}
+      <form className="panel stack" onSubmit={onSubmit}>
+        <div className="field">
+          <label className="label" htmlFor="email">
+            Email
+          </label>
+          <input
+            id="email"
+            className="input"
+            type="email"
+            autoComplete="username"
+            value={email}
+            onChange={(e) => setEmail(e.target.value)}
+            required
+          />
+        </div>
+        <div className="field">
+          <label className="label" htmlFor="password">
+            Password
+          </label>
+          <input
+            id="password"
+            className="input"
+            type="password"
+            autoComplete="current-password"
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            required
+          />
+        </div>
+        <button className="btn" type="submit" disabled={loading}>
+          {loading ? "Signing in…" : "Sign in"}
+        </button>
+        {showOidc && (
+          <button
+            type="button"
+            className="btn btn-secondary"
+            onClick={() => signIn("oidc", { callbackUrl })}
+          >
+            Sign in with {displayName}
+          </button>
+        )}
+      </form>
+    </div>
+  );
+}
+
+export function LoginPageClient(props: Props) {
+  return (
+    <Suspense>
+      <LoginForm {...props} />
+    </Suspense>
+  );
+}

src/lib/auth/auth.ts

@@ -6,6 +6,9 @@ import { eq } from "drizzle-orm";
 import { getDb } from "@/db/client";
 import { users } from "@/db/schema";
 import { authConfig } from "@/lib/auth/auth.config";
+import { emailFromOidcProfile, isOidcConfigured } from "@/lib/auth/oidc";
+
+export { emailFromOidcProfile, isOidcConfigured } from "@/lib/auth/oidc";
 
 function buildProviders(): Provider[] {
   const providers: Provider[] = [
@@ -32,18 +35,45 @@ function buildProviders(): Provider[] {
     }),
   ];
 
-  const issuer = process.env.AUTH_OIDC_ISSUER;
-  const clientId = process.env.AUTH_OIDC_CLIENT_ID;
-  const clientSecret = process.env.AUTH_OIDC_CLIENT_SECRET;
-  if (issuer && clientId && clientSecret) {
+  if (isOidcConfigured()) {
+    const issuer = process.env.AUTH_OIDC_ISSUER!.replace(/\/$/, "");
     providers.push({
       id: "oidc",
       name: process.env.AUTH_OIDC_NAME || "SSO",
       type: "oidc",
       issuer,
-      clientId,
-      clientSecret,
+      wellKnown: `${issuer}/.well-known/openid-configuration`,
+      clientId: process.env.AUTH_OIDC_CLIENT_ID!,
+      clientSecret: process.env.AUTH_OIDC_CLIENT_SECRET!,
+      // Auth.js OIDC defaults to PKCE-only; Authelia requires a strong `state`
+      checks: ["pkce", "state"],
+      // Authelia (and many IdPs) put `email` on UserInfo, not the ID token.
+      // Auth.js OIDC otherwise only reads ID-token claims.
+      idToken: false,
+      authorization: {
+        params: {
+          scope: "openid email profile",
+        },
+      },
+      client: {
+        token_endpoint_auth_method: "client_secret_post",
+      },
+      // Link OIDC logins to existing local users by email
       allowDangerousEmailAccountLinking: true,
+      profile(profile: Record<string, unknown>) {
+        const email = emailFromOidcProfile(profile);
+        return {
+          id: String(profile.sub ?? email ?? crypto.randomUUID()),
+          name:
+            (typeof profile.name === "string" && profile.name) ||
+            (typeof profile.preferred_username === "string" &&
+              profile.preferred_username) ||
+            email ||
+            "OIDC user",
+          email: email ?? undefined,
+          image: typeof profile.picture === "string" ? profile.picture : null,
+        };
+      },
     } as Provider);
   }
 
@@ -55,12 +85,24 @@ export const { handlers, auth, signIn, signOut } = NextAuth({
   providers: buildProviders(),
   callbacks: {
     ...authConfig.callbacks,
-    async signIn({ user, account }) {
+    async signIn({ user, account, profile }) {
       if (account?.provider === "credentials") return true;
-      if (!user.email) return false;
+
+      const email =
+        user.email?.trim().toLowerCase() ||
+        emailFromOidcProfile((profile ?? {}) as Record<string, unknown>);
+
+      if (!email) {
+        console.error(
+          "[auth] OIDC sign-in rejected: no email in profile. Claim keys:",
+          profile ? Object.keys(profile) : []
+        );
+        return "/login?error=EmailRequired";
+      }
+
+      user.email = email;
 
       const db = getDb();
-      const email = user.email.toLowerCase();
       let existing = db.select().from(users).where(eq(users.email, email)).get();
       if (!existing) {
         const id = crypto.randomUUID();
@@ -82,11 +124,3 @@ export const { handlers, auth, signIn, signOut } = NextAuth({
     },
   },
 });
-
-export function isOidcConfigured(): boolean {
-  return Boolean(
-    process.env.AUTH_OIDC_ISSUER &&
-      process.env.AUTH_OIDC_CLIENT_ID &&
-      process.env.AUTH_OIDC_CLIENT_SECRET
-  );
-}

src/lib/auth/oidc.ts

@@ -0,0 +1,27 @@
+export function isOidcConfigured(): boolean {
+  return Boolean(
+    process.env.AUTH_OIDC_ISSUER?.trim() &&
+      process.env.AUTH_OIDC_CLIENT_ID?.trim() &&
+      process.env.AUTH_OIDC_CLIENT_SECRET?.trim()
+  );
+}
+
+/** Pull an email out of common OIDC claim shapes (Authelia, Keycloak, etc.). */
+export function emailFromOidcProfile(
+  profile: Record<string, unknown>
+): string | null {
+  const candidates = [
+    profile.email,
+    profile.preferred_username,
+    profile.upn,
+    profile.mail,
+    (profile.user as { email?: unknown } | undefined)?.email,
+  ];
+
+  for (const value of candidates) {
+    if (typeof value !== "string") continue;
+    const trimmed = value.trim();
+    if (trimmed.includes("@")) return trimmed.toLowerCase();
+  }
+  return null;
+}

tests/unit/oidc-config.test.ts

@@ -0,0 +1,42 @@
+import { afterEach, describe, expect, it } from "vitest";
+import { isOidcConfigured } from "@/lib/auth/oidc";
+
+describe("isOidcConfigured", () => {
+  const keys = [
+    "AUTH_OIDC_ISSUER",
+    "AUTH_OIDC_CLIENT_ID",
+    "AUTH_OIDC_CLIENT_SECRET",
+  ] as const;
+  const previous: Record<string, string | undefined> = {};
+
+  afterEach(() => {
+    for (const key of keys) {
+      if (previous[key] === undefined) delete process.env[key];
+      else process.env[key] = previous[key];
+    }
+  });
+
+  function save() {
+    for (const key of keys) previous[key] = process.env[key];
+  }
+
+  it("is false when any var is missing", () => {
+    save();
+    delete process.env.AUTH_OIDC_ISSUER;
+    delete process.env.AUTH_OIDC_CLIENT_ID;
+    delete process.env.AUTH_OIDC_CLIENT_SECRET;
+    expect(isOidcConfigured()).toBe(false);
+
+    process.env.AUTH_OIDC_ISSUER = "https://sso.example.com/";
+    process.env.AUTH_OIDC_CLIENT_ID = "id";
+    expect(isOidcConfigured()).toBe(false);
+  });
+
+  it("is true when all three are set", () => {
+    save();
+    process.env.AUTH_OIDC_ISSUER = "https://sso.example.com/";
+    process.env.AUTH_OIDC_CLIENT_ID = "id";
+    process.env.AUTH_OIDC_CLIENT_SECRET = "secret";
+    expect(isOidcConfigured()).toBe(true);
+  });
+});

tests/unit/oidc-email.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from "vitest";
+import { emailFromOidcProfile } from "@/lib/auth/oidc";
+
+describe("emailFromOidcProfile", () => {
+  it("reads email claim", () => {
+    expect(emailFromOidcProfile({ email: "[email protected]" })).toBe(
+      "[email protected]"
+    );
+  });
+
+  it("falls back to preferred_username when it looks like an email", () => {
+    expect(
+      emailFromOidcProfile({ preferred_username: "[email protected]" })
+    ).toBe("[email protected]");
+  });
+
+  it("ignores non-email preferred_username", () => {
+    expect(emailFromOidcProfile({ preferred_username: "nick" })).toBeNull();
+  });
+
+  it("returns null when nothing usable is present", () => {
+    expect(emailFromOidcProfile({ sub: "abc", name: "Nick" })).toBeNull();
+  });
+});