implemented login

src/lib/errors.ts

@@ -23,3 +23,12 @@ export const enum RegisterResponseCause {
 	PasswordLength,
 	DisplayNameLength
 }
+
+export const enum LoginResponseCause {
+	Server = 1,
+	MalformedRequest,
+	EmailLength,
+	PasswordLength,
+	NotFound,
+	Timeout
+}

src/lib/server/usermgmt.ts

@@ -1,14 +1,80 @@
 import Bun from "bun"
+import Crypto from "node:crypto"
+import { Prisma } from "@prisma/client"
 
 import { ArgumentError, DuplicateError } from "$lib/errors"
 
 import Log from "$lib/server/log"
 import db from "$lib/server/database"
-import { Prisma } from "@prisma/client"
+
+const SESSION_LIFETIME = 15 * 60 * 1000
+
+export type User = Prisma.UserGetPayload<Prisma.UserDefaultArgs>
+
+export interface SessionData {
+	user: User
+	token: string
+	issued: Date
+	expires: Date
+}
+
+
+interface CacheUserInfo {
+	user: User
+	last_update: Date
+}
+
+interface CacheSessionInfo {
+	user_id: number
+	issued: Date
+	expires: Date
+}
+
+class Cache {
+	private _id_map: Map<number, CacheUserInfo> = new Map()
+	private _session_map: Map<string, CacheSessionInfo> = new Map()
+
+	add(user: User, token: string, issued: Date, expires: Date): SessionData {
+		this._id_map.set(user.id, { 
+			user: user,
+			last_update: new Date() 
+		})
+		this._session_map.set(token, { 
+			user_id: user.id, 
+			issued: issued, 
+			expires: expires
+		})
+
+		return {
+			user: user,
+			token: token,
+			issued: issued,
+			expires: expires
+		}
+	}
+
+	get_session(token: string): SessionData|null {
+		const session_info = this._session_map.get(token)
+		if (!session_info) return null
+
+		const user_info = this._id_map.get(session_info.user_id)
+		if (!user_info) return null
+
+		return {
+			user: user_info.user,
+			token: token,
+			issued: session_info.issued,
+			expires: session_info.expires
+		}
+	}
+	
+}
+
 
 class UserMgmt {
+	_cache: Cache = new Cache()
 
-	async register(email: string, password: string, display_name: string) {
+	async register(email: string, password: string, display_name: string): Promise<User|null> {
 		if (email.length == 0 || password.length == 0 || display_name.length == 0) {
 			throw new ArgumentError("No field may be empty")
 		}
@@ -23,7 +89,6 @@ class UserMgmt {
 			})
 
 			Log.info(Log.module.USER, `Created user with id ${user.id}`)
-			console.log(user)
 
 			return user;
 		} catch (e) {
@@ -37,16 +102,32 @@ class UserMgmt {
 		}
 	}
 
-	async login(email: string, password: string) {
+	async login(email: string, password: string): Promise<SessionData|null> {
 		const user = await db.user.findUnique({
 			where: {
 				email: email
 			}
 		})
-
 		
-	}
+		if (!user) {
+			// throw of timing attacks
+			await Bun.password.verify("a", "$argon2id$v=19$m=16,t=2,p=1$ZHB6Zjd4NXV6RXZBZk9wRg$QaYjeAGLon+x3c5I1KB7UQ")
+			return null
+		}
 
+		if (!await Bun.password.verify(password, user.password_hash)) {
+			return null
+		}
+
+		const token = Crypto.randomBytes(32).toBase64()
+		const session_info = this._cache.add(user, token, new Date(), new Date(Date.now() + SESSION_LIFETIME))
+
+		return session_info
+	}
+	
+	async session_login(token: string): Promise<SessionData|null> {
+		return this._cache.get_session(token)	
+	}
 }
 
 const _manager = new UserMgmt()

src/routes/api/login/+server.ts

@@ -0,0 +1,33 @@
+import type { RequestHandler } from "./$types"
+
+import { error, json, text } from "@sveltejs/kit"
+
+import UserMgmt from "$lib/server/usermgmt"
+
+import { LoginResponseCause } from "$lib/errors"
+
+export const POST: RequestHandler = async ({ request, cookies }) => {
+	
+	const data = await request.formData()
+
+	const email = data.get("email")
+	const password = data.get("password")
+
+	if (data.keys.length > 2 || !(typeof email === "string" && typeof password === "string")) {
+		return error(400, { cause: LoginResponseCause.MalformedRequest, message: "Invalid request" })
+	}
+
+	if (email.length == 0) {
+		return error(400, { cause: LoginResponseCause.EmailLength, message: "Email must be provided" })
+	}
+	if (password.length == 0) {
+		return error(400, { cause: LoginResponseCause.PasswordLength, message: "Password must be provided" })
+	}
+
+	const session = await UserMgmt.login(email, password)
+	if (!session) {
+		return error(401, { message: "Invalid username or password" })
+	}
+
+	return json({ token: session.token, expires: session.expires })
+}