DynamoDNS/server/auth.ts

import passport from "passport";
import { Strategy as LocalStrategy } from "passport-local";
import { Express, Request } from "express";
import session from "express-session";
import { scrypt, randomBytes, timingSafeEqual } from "crypto";
import { promisify } from "util";
import { storage } from "./storage";
import { User, InsertUser } from "@shared/schema";
import { z } from "zod";

declare global {
  namespace Express {
    interface User extends User {}
  }
}

const scryptAsync = promisify(scrypt);

async function hashPassword(password: string) {
  const salt = randomBytes(16).toString("hex");
  const buf = (await scryptAsync(password, salt, 64)) as Buffer;
  return `${buf.toString("hex")}.${salt}`;
}

async function comparePasswords(supplied: string, stored: string) {
  const [hashed, salt] = stored.split(".");
  const hashedBuf = Buffer.from(hashed, "hex");
  const suppliedBuf = (await scryptAsync(supplied, salt, 64)) as Buffer;
  return timingSafeEqual(hashedBuf, suppliedBuf);
}

// API Token Authentication middleware
export function authenticateApiToken(req: Request, res: any, next: any) {
  const authHeader = req.headers.authorization;
  
  if (!authHeader || !authHeader.startsWith('Bearer ')) {
    return next();
  }
  
  const token = authHeader.split(' ')[1];
  
  storage.getApiTokenByToken(token).then(apiToken => {
    if (apiToken && apiToken.isActive) {
      req.apiToken = apiToken;
    }
    next();
  }).catch(err => {
    console.error('API token authentication error:', err);
    next();
  });
}

// Role-based authorization middleware for API and UI
export function requireRole(roles: string[]) {
  return (req: Request, res: any, next: any) => {
    // Check if authenticated via session
    if (req.isAuthenticated() && req.user && roles.includes(req.user.role)) {
      return next();
    }
    
    // Check if authenticated via API token
    if (req.apiToken) {
      const hasPermission = req.apiToken.permissions.some(p => roles.includes(p));
      if (hasPermission) {
        return next();
      }
    }
    
    return res.status(403).json({ message: "Insufficient permissions" });
  };
}

export function setupAuth(app: Express) {
  const sessionSettings: session.SessionOptions = {
    secret: process.env.SESSION_SECRET || 'dynamidns-secret',
    resave: false,
    saveUninitialized: false,
    store: storage.sessionStore,
    cookie: {
      maxAge: 1000 * 60 * 60 * 24, // 1 day
      secure: process.env.NODE_ENV === 'production',
      sameSite: 'lax'
    }
  };

  app.set("trust proxy", 1);
  app.use(session(sessionSettings));
  app.use(passport.initialize());
  app.use(passport.session());
  
  // Apply API token authentication middleware before routes
  app.use(authenticateApiToken);

  passport.use(
    new LocalStrategy(async (username, password, done) => {
      try {
        // Check if username is email format
        const isEmail = username.includes('@');
        
        let user;
        if (isEmail) {
          user = await storage.getUserByEmail(username);
        } else {
          user = await storage.getUserByUsername(username);
        }
        
        if (!user || !(await comparePasswords(password, user.password))) {
          return done(null, false);
        } else {
          return done(null, user);
        }
      } catch (error) {
        return done(error);
      }
    }),
  );

  passport.serializeUser((user, done) => done(null, user.id));
  passport.deserializeUser(async (id: string, done) => {
    try {
      const user = await storage.getUser(id);
      done(null, user);
    } catch (error) {
      done(error);
    }
  });

  // User registration validation schema
  const registerSchema = z.object({
    username: z.string().min(3).max(50),
    password: z.string().min(8).max(100),
    email: z.string().email(),
    fullName: z.string().optional(),
    organizationId: z.string().uuid().optional()
  });

  app.post("/api/register", async (req, res, next) => {
    try {
      // Validate input
      const validatedData = registerSchema.parse(req.body);
      
      // Check if user exists
      const existingUser = await storage.getUserByUsername(validatedData.username);
      if (existingUser) {
        return res.status(400).json({ message: "Username already exists" });
      }
      
      const existingEmail = await storage.getUserByEmail(validatedData.email);
      if (existingEmail) {
        return res.status(400).json({ message: "Email already exists" });
      }
      
      // Create user
      const user = await storage.createUser({
        ...validatedData,
        password: await hashPassword(validatedData.password),
        role: "user", // Default role
      });
      
      // Remove password from response
      const { password, ...userWithoutPassword } = user;

      req.login(user, (err) => {
        if (err) return next(err);
        res.status(201).json(userWithoutPassword);
      });
    } catch (error) {
      if (error instanceof z.ZodError) {
        res.status(400).json({ message: "Validation error", errors: error.errors });
      } else {
        next(error);
      }
    }
  });

  app.post("/api/login", (req, res, next) => {
    passport.authenticate("local", (err, user, info) => {
      if (err) return next(err);
      if (!user) return res.status(401).json({ message: "Invalid credentials" });
      
      req.login(user, (err) => {
        if (err) return next(err);
        
        // Remove password from response
        const { password, ...userWithoutPassword } = user;
        res.status(200).json(userWithoutPassword);
      });
    })(req, res, next);
  });

  app.post("/api/logout", (req, res, next) => {
    req.logout((err) => {
      if (err) return next(err);
      res.sendStatus(200);
    });
  });

  app.get("/api/user", (req, res) => {
    if (!req.isAuthenticated()) return res.status(401).json({ message: "Not authenticated" });
    
    // Remove password from response
    const { password, ...userWithoutPassword } = req.user;
    res.json(userWithoutPassword);
  });
}