75 lines
3.1 KiB
JavaScript
75 lines
3.1 KiB
JavaScript
/* =====================================================================
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lib/customer-auth.js — Sitzungs-Logik für echte Kundenkonten (Google-/PayPal-Login).
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Bewusst GETRENNT von lib/auth.js (Zugangscode-Schranke) — eigenes Geheimnis, eigenes Cookie,
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1:1 Prinzip wie im Original (functions/_shared/customer-auth.js). Einziger Unterschied:
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getCustomer() fragt jetzt synchron better-sqlite3 statt async D1 ab.
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===================================================================== */
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import { db } from "../db.js";
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export const CUSTOMER_COOKIE_NAME = "vandiy_customer_session";
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export const CUSTOMER_SESSION_TAGE = 30;
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function b64urlEncode(bytes) {
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let bin = "";
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bytes.forEach((b) => (bin += String.fromCharCode(b)));
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return btoa(bin).replace(/\+/g, "-").replace(/\//g, "_").replace(/=+$/, "");
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}
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function b64urlDecodeToBytes(str) {
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str = str.replace(/-/g, "+").replace(/_/g, "/");
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while (str.length % 4) str += "=";
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const bin = atob(str);
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return Uint8Array.from(bin, (c) => c.charCodeAt(0));
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}
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async function hmacKey(secret) {
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return crypto.subtle.importKey("raw", new TextEncoder().encode(secret), { name: "HMAC", hash: "SHA-256" }, false, ["sign", "verify"]);
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}
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export async function signCustomerSession(customerId, secret) {
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const payload = JSON.stringify({ cid: customerId, exp: Date.now() + CUSTOMER_SESSION_TAGE * 24 * 60 * 60 * 1000 });
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const payloadB64 = b64urlEncode(new TextEncoder().encode(payload));
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const key = await hmacKey(secret);
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const sig = await crypto.subtle.sign("HMAC", key, new TextEncoder().encode(payloadB64));
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return `${payloadB64}.${b64urlEncode(new Uint8Array(sig))}`;
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}
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export async function verifyCustomerSession(token, secret) {
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if (!token || !token.includes(".")) return null;
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const [payloadB64, sigB64] = token.split(".");
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try {
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const key = await hmacKey(secret);
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const valid = await crypto.subtle.verify("HMAC", key, b64urlDecodeToBytes(sigB64), new TextEncoder().encode(payloadB64));
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if (!valid) return null;
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const payload = JSON.parse(new TextDecoder().decode(b64urlDecodeToBytes(payloadB64)));
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if (!payload.exp || payload.exp < Date.now()) return null;
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return payload; // { cid, exp }
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} catch {
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return null;
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}
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}
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/** Liefert den eingeloggten customers-Datensatz für die aktuelle Anfrage, oder null. Kunden-ID
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* kommt NIE direkt vom Client, immer nur aus der signierten, serverseitig geprüften Sitzung. */
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export async function getCustomer(req) {
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if (!process.env.CUSTOMER_SESSION_SECRET) return null;
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const token = req.cookies?.[CUSTOMER_COOKIE_NAME];
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const payload = token ? await verifyCustomerSession(token, process.env.CUSTOMER_SESSION_SECRET) : null;
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if (!payload?.cid) return null;
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const row = db.prepare(`SELECT id, email, name, provider, created_at FROM customers WHERE id = ?`).get(payload.cid);
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return row || null;
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}
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export function setCustomerCookie(res, token, maxAgeSekunden) {
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res.cookie(CUSTOMER_COOKIE_NAME, token, {
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path: "/",
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maxAge: maxAgeSekunden * 1000,
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httpOnly: true,
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secure: true,
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sameSite: "lax",
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});
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}
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export function clearCustomerCookie(res) {
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res.clearCookie(CUSTOMER_COOKIE_NAME, { path: "/" });
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}
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