1 files changed, 309 insertions, 0 deletions
diff --git a/api/src/routes/auth/register.ts b/api/src/routes/auth/register.ts
new file mode 100644
index 00000000..66a1fc8d
--- /dev/null
+++ b/api/src/routes/auth/register.ts
@@ -0,0 +1,309 @@
+import { Request, Response, Router } from "express";
+import { trimSpecial, User, Snowflake, UserModel, Config } from "@fosscord/server-util";
+import bcrypt from "bcrypt";
+import { check, Email, EMAIL_REGEX, FieldErrors, Length } from "../../util/instanceOf";
+import "missing-native-js-functions";
+import { generateToken } from "./login";
+import { getIpAdress, IPAnalysis, isProxy } from "../../util/ipAddress";
+import { HTTPError } from "lambert-server";
+import RateLimit from "../../middlewares/RateLimit";
+
+const router: Router = Router();
+
+router.post(
+	"/",
+	check({
+		username: new Length(String, 2, 32),
+		// TODO: check min password length in config
+		// prevent Denial of Service with max length of 72 chars
+		password: new Length(String, 8, 72),
+		consent: Boolean,
+		$email: new Length(Email, 5, 100),
+		$fingerprint: String,
+		$invite: String,
+		$date_of_birth: Date, // "2000-04-03"
+		$gift_code_sku_id: String,
+		$captcha_key: String
+	}),
+	async (req: Request, res: Response) => {
+		const {
+			email,
+			username,
+			password,
+			consent,
+			fingerprint,
+			invite,
+			date_of_birth,
+			gift_code_sku_id, // ? what is this
+			captcha_key
+		} = req.body;
+
+		// get register Config
+		const { register, security } = Config.get();
+		const ip = getIpAdress(req);
+
+		if (register.blockProxies) {
+			if (isProxy(await IPAnalysis(ip))) {
+				console.log(`proxy ${ip} blocked from registration`);
+				throw new HTTPError("Your IP is blocked from registration");
+			}
+		}
+
+		console.log("register", req.body.email, req.body.username, ip);
+		// TODO: automatically join invite
+		// TODO: gift_code_sku_id?
+		// TODO: check password strength
+
+		// adjusted_email will be slightly modified version of the user supplied email -> e.g. protection against GMail Trick
+		let adjusted_email: string | null = adjustEmail(email);
+
+		// adjusted_password will be the hash of the password
+		let adjusted_password: string = "";
+
+		// trim special uf8 control characters -> Backspace, Newline, ...
+		let adjusted_username: string = trimSpecial(username);
+
+		// discriminator will be randomly generated
+		let discriminator = "";
+
+		// check if registration is allowed
+		if (!register.allowNewRegistration) {
+			throw FieldErrors({
+				email: { code: "REGISTRATION_DISABLED", message: req.t("auth:register.REGISTRATION_DISABLED") }
+			});
+		}
+
+		// check if the user agreed to the Terms of Service
+		if (!consent) {
+			throw FieldErrors({
+				consent: { code: "CONSENT_REQUIRED", message: req.t("auth:register.CONSENT_REQUIRED") }
+			});
+		}
+
+		// require invite to register -> e.g. for organizations to send invites to their employees
+		if (register.requireInvite && !invite) {
+			throw FieldErrors({
+				email: { code: "INVITE_ONLY", message: req.t("auth:register.INVITE_ONLY") }
+			});
+		}
+
+		if (email) {
+			// replace all dots and chars after +, if its a gmail.com email
+			if (!adjusted_email) throw FieldErrors({ email: { code: "INVALID_EMAIL", message: req.t("auth:register.INVALID_EMAIL") } });
+
+			// check if there is already an account with this email
+			const exists = await UserModel.findOne({ email: adjusted_email })
+				.exec()
+				.catch((e) => {});
+
+			if (exists) {
+				throw FieldErrors({
+					email: {
+						code: "EMAIL_ALREADY_REGISTERED",
+						message: req.t("auth:register.EMAIL_ALREADY_REGISTERED")
+					}
+				});
+			}
+		} else if (register.email.necessary) {
+			throw FieldErrors({
+				email: { code: "BASE_TYPE_REQUIRED", message: req.t("common:field.BASE_TYPE_REQUIRED") }
+			});
+		}
+
+		if (register.dateOfBirth.necessary && !date_of_birth) {
+			throw FieldErrors({
+				date_of_birth: { code: "BASE_TYPE_REQUIRED", message: req.t("common:field.BASE_TYPE_REQUIRED") }
+			});
+		} else if (register.dateOfBirth.minimum) {
+			const minimum = new Date();
+			minimum.setFullYear(minimum.getFullYear() - register.dateOfBirth.minimum);
+
+			// higher is younger
+			if (date_of_birth > minimum) {
+				throw FieldErrors({
+					date_of_birth: {
+						code: "DATE_OF_BIRTH_UNDERAGE",
+						message: req.t("auth:register.DATE_OF_BIRTH_UNDERAGE", { years: register.dateOfBirth.minimum })
+					}
+				});
+			}
+		}
+
+		if (!register.allowMultipleAccounts) {
+			// TODO: check if fingerprint was eligible generated
+			const exists = await UserModel.findOne({ fingerprints: fingerprint })
+				.exec()
+				.catch((e) => {});
+
+			if (exists) {
+				throw FieldErrors({
+					email: {
+						code: "EMAIL_ALREADY_REGISTERED",
+						message: req.t("auth:register.EMAIL_ALREADY_REGISTERED")
+					}
+				});
+			}
+		}
+
+		if (register.requireCaptcha && security.captcha.enabled) {
+			if (!captcha_key) {
+				const { sitekey, service } = security.captcha;
+				return res.status(400).json({
+					captcha_key: ["captcha-required"],
+					captcha_sitekey: sitekey,
+					captcha_service: service
+				});
+			}
+
+			// TODO: check captcha
+		}
+
+		// the salt is saved in the password refer to bcrypt docs
+		adjusted_password = await bcrypt.hash(password, 12);
+
+		let exists;
+		// randomly generates a discriminator between 1 and 9999 and checks max five times if it already exists
+		// if it all five times already exists, abort with USERNAME_TOO_MANY_USERS error
+		// else just continue
+		// TODO: is there any better way to generate a random discriminator only once, without checking if it already exists in the mongodb database?
+		for (let tries = 0; tries < 5; tries++) {
+			discriminator = Math.randomIntBetween(1, 9999).toString().padStart(4, "0");
+			try {
+				exists = await UserModel.findOne({ discriminator, username: adjusted_username }, "id").exec();
+			} catch (error) {
+				// doesn't exist -> break
+				break;
+			}
+		}
+
+		if (exists) {
+			throw FieldErrors({
+				username: {
+					code: "USERNAME_TOO_MANY_USERS",
+					message: req.t("auth:register.USERNAME_TOO_MANY_USERS")
+				}
+			});
+		}
+
+		// TODO: save date_of_birth
+		// appearently discord doesn't save the date of birth and just calculate if nsfw is allowed
+		// if nsfw_allowed is null/undefined it'll require date_of_birth to set it to true/false
+
+		const user: User = {
+			id: Snowflake.generate(),
+			created_at: new Date(),
+			username: adjusted_username,
+			discriminator,
+			avatar: null,
+			accent_color: null,
+			banner: null,
+			bot: false,
+			system: false,
+			desktop: false,
+			mobile: false,
+			premium: true,
+			premium_type: 2,
+			phone: null,
+			bio: "",
+			mfa_enabled: false,
+			verified: false,
+			disabled: false,
+			deleted: false,
+			presence: {
+				activities: [],
+				client_status: {
+					desktop: undefined,
+					mobile: undefined,
+					web: undefined
+				},
+				status: "offline"
+			},
+			email: adjusted_email,
+			nsfw_allowed: true, // TODO: depending on age
+			public_flags: 0n,
+			flags: 0n, // TODO: generate default flags
+			guilds: [],
+			user_data: {
+				hash: adjusted_password,
+				valid_tokens_since: new Date(),
+				relationships: [],
+				connected_accounts: [],
+				fingerprints: []
+			},
+			user_settings: {
+				afk_timeout: 300,
+				allow_accessibility_detection: true,
+				animate_emoji: true,
+				animate_stickers: 0,
+				contact_sync_enabled: false,
+				convert_emoticons: false,
+				custom_status: {
+					emoji_id: null,
+					emoji_name: null,
+					expires_at: null,
+					text: null
+				},
+				default_guilds_restricted: false,
+				detect_platform_accounts: true,
+				developer_mode: false,
+				disable_games_tab: false,
+				enable_tts_command: true,
+				explicit_content_filter: 0,
+				friend_source_flags: { all: true },
+				gateway_connected: false,
+				gif_auto_play: true,
+				guild_folders: [],
+				guild_positions: [],
+				inline_attachment_media: true,
+				inline_embed_media: true,
+				locale: req.language,
+				message_display_compact: false,
+				native_phone_integration_enabled: true,
+				render_embeds: true,
+				render_reactions: true,
+				restricted_guilds: [],
+				show_current_game: true,
+				status: "offline",
+				stream_notifications_enabled: true,
+				theme: "dark",
+				timezone_offset: 0
+				// timezone_offset: // TODO: timezone from request
+			}
+		};
+
+		// insert user into database
+		await new UserModel(user).save();
+
+		return res.json({ token: await generateToken(user.id) });
+	}
+);
+
+export function adjustEmail(email: string): string | null {
+	// body parser already checked if it is a valid email
+	const parts = <RegExpMatchArray>email.match(EMAIL_REGEX);
+	// @ts-ignore
+	if (!parts || parts.length < 5) return undefined;
+	const domain = parts[5];
+	const user = parts[1];
+
+	// TODO: check accounts with uncommon email domains
+	if (domain === "gmail.com" || domain === "googlemail.com") {
+		// replace .dots and +alternatives -> Gmail Dot Trick https://support.google.com/mail/answer/7436150 and https://generator.email/blog/gmail-generator
+		return user.replace(/[.]|(\+.*)/g, "") + "@gmail.com";
+	}
+
+	return email;
+}
+
+export default router;
+
+/**
+ * POST /auth/register
+ * @argument { "fingerprint":"805826570869932034.wR8vi8lGlFBJerErO9LG5NViJFw", "email":"qo8etzvaf@gmail.com", "username":"qp39gr98", "password":"wtp9gep9gw", "invite":null, "consent":true, "date_of_birth":"2000-04-04", "gift_code_sku_id":null, "captcha_key":null}
+ *
+ * Field Error
+ * @returns { "code": 50035, "errors": { "consent": { "_errors": [{ "code": "CONSENT_REQUIRED", "message": "You must agree to Discord's Terms of Service and Privacy Policy." }]}}, "message": "Invalid Form Body"}
+ *
+ * Success 201:
+ * @returns {token: "OMITTED"}
+ */