feat: security and auditing

api/src/app/plugins/auth.ts

@@ -23,13 +23,34 @@ declare module "@fastify/jwt" {
   }
 }
 
+const getJwtSecret = (): string => {
+  const secret = process.env.JWT_SECRET;
+  if (!secret) {
+    throw new Error("JWT_SECRET environment variable is required");
+  }
+  return secret;
+};
+
 const authPlugin: FastifyPluginAsync = async (app) => {
+  const jwtSecret = getJwtSecret();
+
+  // Register cookie plugin with signing secret
+  app.register(fastifyCookie, {
+    secret: jwtSecret,
+  });
+
   // Register JWT plugin
   app.register(fastifyJwt, {
-    secret: process.env.JWT_SECRET || "your-secret-key",
+    secret: jwtSecret,
+    sign: {
+      algorithm: "HS256",
+    },
+    verify: {
+      algorithms: ["HS256"],
+    },
     cookie: {
       cookieName: "auth-token",
-      signed: false,
+      signed: true,
     },
     formatUser: (payload: { sub: string; email?: string; username: string; isAdmin: boolean }) => {
       return {
@@ -41,9 +62,6 @@ const authPlugin: FastifyPluginAsync = async (app) => {
     },
   });
 
-  // Register cookie plugin
-  app.register(fastifyCookie);
-
   // Register Discord OAuth2
   app.register(fastifyOauth2, {
     name: "oauth2Discord",

api/src/app/plugins/cors.ts

@@ -0,0 +1,26 @@
+/**
+ * @copyright 2026 NHCarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { FastifyPluginAsync } from "fastify";
+import fastifyPlugin from "fastify-plugin";
+import fastifyCors from "@fastify/cors";
+
+const corsPlugin: FastifyPluginAsync = async (app) => {
+  const baseUrl = process.env.BASE_URL;
+
+  if (!baseUrl) {
+    throw new Error("BASE_URL environment variable is required");
+  }
+
+  await app.register(fastifyCors, {
+    origin: baseUrl,
+    credentials: true,
+    methods: ["GET", "POST", "PUT", "DELETE", "OPTIONS"],
+    allowedHeaders: ["Content-Type", "Authorization", "X-CSRF-Token"],
+  });
+};
+
+export default fastifyPlugin(corsPlugin);

api/src/app/plugins/csrf.ts

@@ -0,0 +1,26 @@
+/**
+ * @copyright 2026 NHCarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { FastifyPluginAsync, FastifyRequest } from "fastify";
+import fastifyPlugin from "fastify-plugin";
+import fastifyCsrf from "@fastify/csrf-protection";
+
+const csrfPlugin: FastifyPluginAsync = async (app) => {
+  await app.register(fastifyCsrf, {
+    sessionPlugin: "@fastify/cookie",
+    cookieOpts: {
+      path: "/",
+      httpOnly: true,
+      secure: process.env.NODE_ENV === "production",
+      sameSite: "lax",
+    },
+    getToken: (request: FastifyRequest) => {
+      return request.headers["x-csrf-token"] as string;
+    },
+  });
+};
+
+export default fastifyPlugin(csrfPlugin);

api/src/app/plugins/helmet.ts

@@ -0,0 +1,27 @@
+/**
+ * @copyright 2026 NHCarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { FastifyPluginAsync } from "fastify";
+import fastifyPlugin from "fastify-plugin";
+import fastifyHelmet from "@fastify/helmet";
+
+const helmetPlugin: FastifyPluginAsync = async (app) => {
+  await app.register(fastifyHelmet, {
+    contentSecurityPolicy: {
+      directives: {
+        defaultSrc: ["'self'"],
+        styleSrc: ["'self'", "'unsafe-inline'"],
+        imgSrc: ["'self'", "data:", "https:"],
+        scriptSrc: ["'self'"],
+        connectSrc: ["'self'", process.env.FRONTEND_URL ?? "http://localhost:4200"],
+      },
+    },
+    crossOriginEmbedderPolicy: false,
+    crossOriginResourcePolicy: { policy: "cross-origin" },
+  });
+};
+
+export default fastifyPlugin(helmetPlugin);

api/src/app/plugins/rate-limit.ts

@@ -0,0 +1,37 @@
+/**
+ * @copyright 2026 NHCarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { FastifyPluginAsync } from "fastify";
+import fastifyPlugin from "fastify-plugin";
+import fastifyRateLimit from "@fastify/rate-limit";
+import { AuditService } from "../services/audit.service";
+import { AuditAction, AuditCategory } from "@library/shared-types";
+
+const rateLimitPlugin: FastifyPluginAsync = async (app) => {
+  await app.register(fastifyRateLimit, {
+    max: 100,
+    timeWindow: "1 minute",
+    errorResponseBuilder: (request) => {
+      // Log rate limit exceeded event
+      AuditService.log({
+        action: AuditAction.RATE_LIMIT_EXCEEDED,
+        category: AuditCategory.SECURITY,
+        details: `Rate limit exceeded for URL: ${request.url}`,
+        success: false,
+      }, request).catch(() => {
+        // Ignore logging errors to avoid blocking the response
+      });
+
+      return {
+        statusCode: 429,
+        error: "Too Many Requests",
+        message: "You have exceeded the rate limit. Please try again later.",
+      };
+    },
+  });
+};
+
+export default fastifyPlugin(rateLimitPlugin);