build out google auth flow

.gitignore

@@ -33,4 +33,9 @@ report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
 # Finder (MacOS) folder config
 .DS_Store
 
+# Tables
 *.sqlite
+
+# Key files
+private.key
+public.pem

bun.lock

@@ -6,11 +6,13 @@
       "dependencies": {
         "better-sqlite3": "^12.2.0",
         "drizzle-orm": "^0.44.2",
+        "openid-client": "^6.6.2",
       },
       "devDependencies": {
         "@types/better-sqlite3": "^7.6.13",
         "@types/bun": "latest",
         "@types/node": "^24.0.7",
+        "@types/openid-client": "^3.7.0",
         "drizzle-kit": "^0.31.4",
       },
       "peerDependencies": {
@@ -81,6 +83,8 @@
 
     "@types/node": ["@types/node@24.0.7", "", { "dependencies": { "undici-types": "~7.8.0" } }, "sha512-YIEUUr4yf8q8oQoXPpSlnvKNVKDQlPMWrmOcgzoduo7kvA2UF0/BwJ/eMKFTiTtkNL17I0M6Xe2tvwFU7be6iw=="],
 
+    "@types/openid-client": ["@types/openid-client@3.7.0", "", { "dependencies": { "openid-client": "*" } }, "sha512-hW+QbAeUyfUHABwUjUECOcv56Mf5tN29xK3GPN7wy3R3XfIQdkm37XELA4wbe2RNG9GYUpN8l2ytfoW05XmpgQ=="],
+
     "base64-js": ["base64-js@1.5.1", "", {}, "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA=="],
 
     "better-sqlite3": ["better-sqlite3@12.2.0", "", { "dependencies": { "bindings": "^1.5.0", "prebuild-install": "^7.1.1" } }, "sha512-eGbYq2CT+tos1fBwLQ/tkBt9J5M3JEHjku4hbvQUePCckkvVf14xWj+1m7dGoK81M/fOjFT7yM9UMeKT/+vFLQ=="],
@@ -131,6 +135,8 @@
 
     "ini": ["ini@1.3.8", "", {}, "sha512-JV/yugV2uzW5iMRSiZAyDtQd+nxtUnjeLt0acNdw98kKLrvuRVyB80tsREOE7yvGVgalhZ6RNXCmEHkUKBKxew=="],
 
+    "jose": ["jose@6.0.11", "", {}, "sha512-QxG7EaliDARm1O1S8BGakqncGT9s25bKL1WSf6/oa17Tkqwi8D2ZNglqCF+DsYF88/rV66Q/Q2mFAy697E1DUg=="],
+
     "mimic-response": ["mimic-response@3.1.0", "", {}, "sha512-z0yWI+4FDrrweS8Zmt4Ej5HdJmky15+L2e6Wgn3+iK5fWzb6T3fhNFq2+MeTRb064c6Wr4N/wv0DzQTjNzHNGQ=="],
 
     "minimist": ["minimist@1.2.8", "", {}, "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA=="],
@@ -143,8 +149,12 @@
 
     "node-abi": ["node-abi@3.75.0", "", { "dependencies": { "semver": "^7.3.5" } }, "sha512-OhYaY5sDsIka7H7AtijtI9jwGYLyl29eQn/W623DiN/MIv5sUqc4g7BIDThX+gb7di9f6xK02nkp8sdfFWZLTg=="],
 
+    "oauth4webapi": ["oauth4webapi@3.5.5", "", {}, "sha512-1K88D2GiAydGblHo39NBro5TebGXa+7tYoyIbxvqv3+haDDry7CBE1eSYuNbOSsYCCU6y0gdynVZAkm4YPw4hg=="],
+
     "once": ["once@1.4.0", "", { "dependencies": { "wrappy": "1" } }, "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w=="],
 
+    "openid-client": ["openid-client@6.6.2", "", { "dependencies": { "jose": "^6.0.11", "oauth4webapi": "^3.5.4" } }, "sha512-Xya5TNMnnZuTM6DbHdB4q0S3ig2NTAELnii/ASie1xDEr8iiB8zZbO871OWBdrw++sd3hW6bqWjgcmSy1RTWHA=="],
+
     "prebuild-install": ["prebuild-install@7.1.3", "", { "dependencies": { "detect-libc": "^2.0.0", "expand-template": "^2.0.3", "github-from-package": "0.0.0", "minimist": "^1.2.3", "mkdirp-classic": "^0.5.3", "napi-build-utils": "^2.0.0", "node-abi": "^3.3.0", "pump": "^3.0.0", "rc": "^1.2.7", "simple-get": "^4.0.0", "tar-fs": "^2.0.0", "tunnel-agent": "^0.6.0" }, "bin": { "prebuild-install": "bin.js" } }, "sha512-8Mf2cbV7x1cXPUILADGI3wuhfqWvtiLA1iclTDbFRZkgRQS0NqsPZphna9V+HyTEadheuPmjaJMsbzKQFOzLug=="],
 
     "pump": ["pump@3.0.3", "", { "dependencies": { "end-of-stream": "^1.1.0", "once": "^1.3.1" } }, "sha512-todwxLMY7/heScKmntwQG8CXVkWUOdYxIvY2s0VWAAMh/nd8SoYiRaKjlr7+iCs984f2P8zvrfWcDDYVb73NfA=="],

package.json

@@ -7,6 +7,7 @@
     "@types/better-sqlite3": "^7.6.13",
     "@types/bun": "latest",
     "@types/node": "^24.0.7",
+    "@types/openid-client": "^3.7.0",
     "drizzle-kit": "^0.31.4"
   },
   "peerDependencies": {
@@ -14,7 +15,8 @@
   },
   "dependencies": {
     "better-sqlite3": "^12.2.0",
-    "drizzle-orm": "^0.44.2"
+    "drizzle-orm": "^0.44.2",
+    "openid-client": "^6.6.2"
   },
   "scripts": {
     "dev": "bun --hot src/index.ts",

src/auth/google/client.ts

@@ -0,0 +1,56 @@
+import * as client from "openid-client";
+
+const GOOGLE_ISSUER = new URL("https://accounts.google.com");
+
+let OIDC: client.Configuration;
+let code_verifier: string;
+let state: string;
+
+// setup OIDC client
+async function initOIDC() {
+  OIDC = await client.discovery(
+    GOOGLE_ISSUER,
+    process.env.GOOGLE_CLIENT_ID!,
+    process.env.GOOGLE_CLIENT_SECRET!
+  );
+}
+
+// start the login flow
+export async function login() {
+  if (!OIDC) await initOIDC();
+
+  code_verifier = client.randomPKCECodeVerifier();
+  const code_challenge = await client.calculatePKCECodeChallenge(code_verifier);
+  state = client.randomState();
+
+  const params = {
+    redirect_uri:
+      process.env.GOOGLE_REDIRECT_URI ||
+      "http://localhost:3000/auth/google/callback",
+    scope: "openid email profile",
+    code_challenge,
+    code_challenge_method: "S256" as const,
+    state,
+  };
+
+  // return the redirect URL
+  return client.buildAuthorizationUrl(OIDC, params);
+}
+
+// handle the callback from google after login
+export async function callback(url: URL) {
+  if (!OIDC) await initOIDC();
+
+  try {
+    const tokenSet = await client.authorizationCodeGrant(OIDC, url, {
+      pkceCodeVerifier: code_verifier,
+      expectedState: state,
+    });
+
+    const claims = tokenSet.claims();
+    return claims;
+  } catch (error) {
+    console.error("Token exchange failed:", error);
+    return JSON.stringify({ error: "Authentication failed" });
+  }
+}

src/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Login</title>
+  </head>
+  <body>
+    <ul>
+      <li><a href="/auth/google/login">Login with Google</a></li>
+    </ul>
+  </body>
+</html>

src/index.ts

@@ -1,17 +1,19 @@
 import { createUser, getUser } from "./db/util";
+import landing from "./index.html";
+
 Bun.serve({
   port: Number(process.env.PORT) || 3000,
   routes: {
-    "/": () => {
-      return new Response("Welcome to the landing page!", { status: 200 });
+    "/": landing,
+    "/auth/:provider/login": async (req) => {
+      const { login } = await import(`./auth/${req.params.provider}/client`);
+      const redirectUrl = await login();
+      return Response.redirect(redirectUrl.toString(), 302);
     },
-    "/public/*": (req) => {
-      const filePath = `./src/public${req.url.slice(7)}`;
-      if (Bun.file(filePath).size) {
-        return new Response(Bun.file(filePath));
-      } else {
-        return new Response("File not found", { status: 404 });
-      }
+    "/auth/:provider/callback": async (req) => {
+      const { callback } = await import(`./auth/${req.params.provider}/client`);
+      let claims = await callback(new URL(req.url));
+      return Response.json(claims);
     },
     "/api/users/:email": async (req) => {
       return Response.json(await getUser(req.params.email));
@@ -24,7 +26,12 @@ Bun.serve({
       );
     },
   },
-  fetch(req): Response {
+  websocket: {
+    open() {},
+    message() {},
+    close() {},
+  },
+  fetch(): Response {
     return new Response("Page not found.", {
       status: 404,
     });