84 lines
2.8 KiB
TypeScript
84 lines
2.8 KiB
TypeScript
import { siteSettings } from "@/lib/services/site-settings";
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/**
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* Server-side CAPTCHA verification, driven by website_settings so staff pick the
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* provider in housekeeping. Supports Cloudflare Turnstile and Google reCAPTCHA
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* (the two AtomCMS offers, mutually exclusive). FAIL-OPEN by configuration: when
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* no provider/secret is set, registration isn't blocked; only an explicitly
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* configured provider with a failing/absent token blocks.
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*
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* Settings keys:
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* captcha_provider = "turnstile" | "recaptcha" | "none" (default none)
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* turnstile_secret / turnstile_site_key
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* recaptcha_secret / recaptcha_site_key
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*/
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export interface CaptchaConfig {
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provider: "turnstile" | "recaptcha" | "none";
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siteKey: string;
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/** Form field the widget writes the token into. */
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field: string;
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}
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const TURNSTILE_URL =
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"https://challenges.cloudflare.com/turnstile/v0/siteverify";
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const RECAPTCHA_URL = "https://www.google.com/recaptcha/api/siteverify";
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/** Public config the register page needs to render the widget (no secrets). */
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export async function captchaConfig(): Promise<CaptchaConfig> {
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const provider = (
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(await siteSettings.get("captcha_provider", "none")) ?? "none"
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).toLowerCase();
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if (provider === "turnstile") {
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return {
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provider: "turnstile",
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siteKey: (await siteSettings.get("turnstile_site_key", "")) ?? "",
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field: "cf-turnstile-response",
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};
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}
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if (provider === "recaptcha") {
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return {
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provider: "recaptcha",
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siteKey: (await siteSettings.get("recaptcha_site_key", "")) ?? "",
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field: "g-recaptcha-response",
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};
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}
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return { provider: "none", siteKey: "", field: "" };
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}
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/** Verify a submitted token. Returns true when allowed (incl. fail-open). */
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export async function verifyCaptcha(
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token: string | null,
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remoteIp?: string,
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): Promise<boolean> {
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const cfg = await captchaConfig();
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if (cfg.provider === "none" || !cfg.siteKey) return true;
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const secretKey =
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cfg.provider === "turnstile" ? "turnstile_secret" : "recaptcha_secret";
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const secret = (await siteSettings.get(secretKey, "")) ?? "";
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if (!secret) return true; // configured but no secret — don't hard-block
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if (!token) return false;
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const url = cfg.provider === "turnstile" ? TURNSTILE_URL : RECAPTCHA_URL;
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const body = new URLSearchParams({ secret, response: token });
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if (remoteIp) body.set("remoteip", remoteIp);
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try {
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const controller = new AbortController();
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const timer = setTimeout(() => controller.abort(), 5000);
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const res = await fetch(url, {
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method: "POST",
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headers: { "content-type": "application/x-www-form-urlencoded" },
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body,
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signal: controller.signal,
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cache: "no-store",
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});
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clearTimeout(timer);
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const data = (await res.json()) as { success?: boolean };
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return data?.success === true;
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} catch {
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// Network/timeout — fail-open so a provider outage can't lock out signups.
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return true;
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}
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}
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