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import { createHash, randomBytes } from "node:crypto";
import { zValidator } from "@hono/zod-validator";
import * as argon2 from "argon2";
import { Hono } from "hono";
import { sign } from "hono/jwt";
import { Errors, loginRateLimiter } from "../middleware/index.js";
import {
type RefreshTokenRepository,
refreshTokenRepository,
type UserRepository,
userRepository,
} from "../repositories/index.js";
import { loginSchema, refreshTokenSchema } from "../schemas/index.js";
function getJwtSecret(): string {
const secret = process.env.JWT_SECRET;
if (!secret) {
throw new Error("JWT_SECRET environment variable is required");
}
return secret;
}
const ACCESS_TOKEN_EXPIRES_IN = 60 * 15; // 15 minutes
const REFRESH_TOKEN_EXPIRES_IN = 60 * 60 * 24 * 7; // 7 days
function generateRefreshToken(): string {
return randomBytes(32).toString("hex");
}
function hashToken(token: string): string {
return createHash("sha256").update(token).digest("hex");
}
export interface AuthDependencies {
userRepo: UserRepository;
refreshTokenRepo: RefreshTokenRepository;
}
export function createAuthRouter(deps: AuthDependencies) {
const { userRepo, refreshTokenRepo } = deps;
return new Hono()
.post(
"/login",
loginRateLimiter,
zValidator("json", loginSchema),
async (c) => {
const { username, password } = c.req.valid("json");
// Find user by username
const user = await userRepo.findByUsername(username);
if (!user) {
throw Errors.unauthorized(
"Invalid username or password",
"INVALID_CREDENTIALS",
);
}
// Verify password
const isPasswordValid = await argon2.verify(
user.passwordHash,
password,
);
if (!isPasswordValid) {
throw Errors.unauthorized(
"Invalid username or password",
"INVALID_CREDENTIALS",
);
}
// Generate JWT access token
const now = Math.floor(Date.now() / 1000);
const accessToken = await sign(
{
sub: user.id,
iat: now,
exp: now + ACCESS_TOKEN_EXPIRES_IN,
},
getJwtSecret(),
);
// Generate refresh token
const refreshToken = generateRefreshToken();
const tokenHash = hashToken(refreshToken);
const expiresAt = new Date(
Date.now() + REFRESH_TOKEN_EXPIRES_IN * 1000,
);
// Store refresh token in database
await refreshTokenRepo.create({
userId: user.id,
tokenHash,
expiresAt,
});
return c.json(
{
accessToken,
refreshToken,
user: {
id: user.id,
username: user.username,
},
},
200,
);
},
)
.post("/refresh", zValidator("json", refreshTokenSchema), async (c) => {
const { refreshToken } = c.req.valid("json");
const tokenHash = hashToken(refreshToken);
// Find valid refresh token
const storedToken = await refreshTokenRepo.findValidToken(tokenHash);
if (!storedToken) {
throw Errors.unauthorized(
"Invalid or expired refresh token",
"INVALID_REFRESH_TOKEN",
);
}
// Get user info
const user = await userRepo.findById(storedToken.userId);
if (!user) {
throw Errors.unauthorized("User not found", "USER_NOT_FOUND");
}
// Delete old refresh token (rotation)
await refreshTokenRepo.deleteById(storedToken.id);
// Generate new access token
const now = Math.floor(Date.now() / 1000);
const accessToken = await sign(
{
sub: user.id,
iat: now,
exp: now + ACCESS_TOKEN_EXPIRES_IN,
},
getJwtSecret(),
);
// Generate new refresh token (rotation)
const newRefreshToken = generateRefreshToken();
const newTokenHash = hashToken(newRefreshToken);
const expiresAt = new Date(Date.now() + REFRESH_TOKEN_EXPIRES_IN * 1000);
await refreshTokenRepo.create({
userId: user.id,
tokenHash: newTokenHash,
expiresAt,
});
return c.json(
{
accessToken,
refreshToken: newRefreshToken,
user: {
id: user.id,
username: user.username,
},
},
200,
);
});
}
// Default auth router with real repositories for production use
export const auth = createAuthRouter({
userRepo: userRepository,
refreshTokenRepo: refreshTokenRepository,
});
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