Captcha checking

api/src/routes/auth/login.ts

@@ -1,5 +1,5 @@
 import { Request, Response, Router } from "express";
-import { route } from "@fosscord/api";
+import { route, getIpAdress, verifyCaptcha } from "@fosscord/api";
 import bcrypt from "bcrypt";
 import { Config, User, generateToken, adjustEmail, FieldErrors } from "@fosscord/util";
 
@@ -23,8 +23,8 @@ router.post("/", route({ body: "LoginSchema" }), async (req: Request, res: Respo
 	const config = Config.get();
 
 	if (config.login.requireCaptcha && config.security.captcha.enabled) {
+		const { sitekey, service } = config.security.captcha;
 		if (!captcha_key) {
-			const { sitekey, service } = config.security.captcha;
 			return res.status(400).json({
 				captcha_key: ["captcha-required"],
 				captcha_sitekey: sitekey,
@@ -32,7 +32,15 @@ router.post("/", route({ body: "LoginSchema" }), async (req: Request, res: Respo
 			});
 		}
 
-		// TODO: check captcha
+		const ip = getIpAdress(req);
+		const verify = await verifyCaptcha(captcha_key, ip);
+		if (!verify.success) {
+			return res.status(400).json({
+				captcha_key: verify["error-codes"],
+				captcha_sitekey: sitekey,
+				captcha_service: service
+			})
+		}
 	}
 
 	const user = await User.findOneOrFail({

api/src/routes/auth/register.ts

@@ -1,6 +1,6 @@
 import { Request, Response, Router } from "express";
-import { Config, generateToken, Invite, FieldErrors, User, adjustEmail, trimSpecial } from "@fosscord/util";
-import { route, getIpAdress, IPAnalysis, isProxy } from "@fosscord/api";
+import { Config, generateToken, Invite, FieldErrors, User, adjustEmail } from "@fosscord/util";
+import { route, getIpAdress, IPAnalysis, isProxy, verifyCaptcha } from "@fosscord/api";
 import "missing-native-js-functions";
 import bcrypt from "bcrypt";
 import { HTTPError } from "lambert-server";
@@ -65,8 +65,8 @@ router.post("/", route({ body: "RegisterSchema" }), async (req: Request, res: Re
 	}
 
 	if (register.requireCaptcha && security.captcha.enabled) {
+		const { sitekey, service } = security.captcha;
 		if (!body.captcha_key) {
-			const { sitekey, service } = security.captcha;
 			return res?.status(400).json({
 				captcha_key: ["captcha-required"],
 				captcha_sitekey: sitekey,
@@ -74,7 +74,14 @@ router.post("/", route({ body: "RegisterSchema" }), async (req: Request, res: Re
 			});
 		}
 
-		// TODO: check captcha
+		const verify = await verifyCaptcha(body.captcha_key, ip);
+		if (!verify.success) {
+			return res.status(400).json({
+				captcha_key: verify["error-codes"],
+				captcha_sitekey: sitekey,
+				captcha_service: service
+			})
+		}
 	}
 
 	if (!register.allowMultipleAccounts) {

api/src/util/index.ts

@@ -6,3 +6,4 @@ export * from "./utility/RandomInviteID";
 export * from "./handlers/route";
 export * from "./utility/String";
 export * from "./handlers/Voice";
+export * from "./utility/captcha";

api/src/util/utility/captcha.ts

@@ -0,0 +1,46 @@
+import { Config } from "@fosscord/util";
+import fetch from "node-fetch";
+
+export interface hcaptchaResponse {
+	success: boolean;
+	challenge_ts: string;
+	hostname: string;
+	credit: boolean;
+	"error-codes": string[];
+	score: number;	// enterprise only
+	score_reason: string[];	// enterprise only
+}
+
+export interface recaptchaResponse {
+	success: boolean;
+	score: number; // between 0 - 1
+	action: string;
+	challenge_ts: string;
+	hostname: string;
+	"error-codes"?: string[];
+}
+
+const verifyEndpoints = {
+	hcaptcha: "https://hcaptcha.com/siteverify",
+	recaptcha: "https://www.google.com/recaptcha/api/siteverify",
+}
+
+export async function verifyCaptcha(response: string, ip?: string) {
+	const { security } = Config.get();
+	const { service, secret, sitekey } = security.captcha;
+
+	if (!service) throw new Error("Cannot verify captcha without service");
+
+	const res = await fetch(verifyEndpoints[service], {
+		method: "POST",
+		headers: {
+			"Content-Type": "application/x-www-form-urlencoded",
+		},
+		body: `response=${encodeURIComponent(response)}`
+			+ `&secret=${encodeURIComponent(secret!)}`
+			+ `&sitekey=${encodeURIComponent(sitekey!)}`
+			+ (ip ? `&remoteip=${encodeURIComponent(ip!)}` : ""),
+	});
+
+	return await res.json() as hcaptchaResponse | recaptchaResponse;
+}