Now with smooth access token refreshing

ref #6

src/authchecker.ts

@@ -1,10 +1,13 @@
+import cookie from "cookie";
 import * as jwt from "jsonwebtoken";
 import { Action } from "routing-controllers";
 import { getConnectionManager } from 'typeorm';
 import { config } from './config';
 import { IllegalJWTError, NoPermissionError, UserNonexistantOrRefreshtokenInvalidError } from './errors/AuthError';
+import { JwtCreator, JwtUser } from './JwtCreator';
 import { User } from './models/entities/User';
 
+
 const authchecker = async (action: Action, permissions: string[] | string) => {
     let required_permissions = undefined;
     if (typeof permissions === "string") {
@@ -13,34 +16,52 @@ const authchecker = async (action: Action, permissions: string[] | string) => {
         required_permissions = permissions
     }
 
-    const provided_token = action.request.headers["authorization"].replace("Bearer ", "");
+    let provided_token = "" + action.request.headers["authorization"];
+    try {
+        provided_token = provided_token.replace("Bearer ", "");
+    }
+    catch { }
     let jwtPayload = undefined
     try {
         jwtPayload = <any>jwt.verify(provided_token, config.jwt_secret);
+        jwtPayload = jwtPayload["userdetails"];
     } catch (error) {
-        throw new IllegalJWTError()
+        jwtPayload = await refresh(action);
     }
-    const user = await getConnectionManager().get().getRepository(User).findOne({ id: jwtPayload["userdetails"]["id"], refreshTokenCount: jwtPayload["userdetails"]["refreshTokenCount"] }, { relations: ['permissions'] })
+    const user = await getConnectionManager().get().getRepository(User).findOne({ id: jwtPayload["id"], refreshTokenCount: jwtPayload["refreshTokenCount"] }, { relations: ['permissions'] })
     if (!user) { throw new UserNonexistantOrRefreshtokenInvalidError() }
-    if (!jwtPayload.permissions) { throw new NoPermissionError(); }
+    if (!jwtPayload["permissions"]) { throw new NoPermissionError(); }
 
     action.response.local = {}
-    action.response.local.jwtPayload = jwtPayload.permissions
-    required_permissions.forEach(r => {
-        const permission_key = r.split(":")[0]
-        const actual_accesslevel_for_permission = jwtPayload.permissions[permission_key]
-        const permission_access_level = r.split(":")[1]
-        if (actual_accesslevel_for_permission.includes(permission_access_level)) {
-            return true;
-        } else {
-            throw new NoPermissionError()
-        }
-    });
-    try {
-        jwt.verify(provided_token, config.jwt_secret);
-        return true
-    } catch (error) {
-        return false
+    action.response.local.jwtPayload = jwtPayload;
+    for (let required_permission of required_permissions) {
+        if (!(jwtPayload["permissions"].includes(required_permission))) { return false; }
     }
+    return true;
+}
+
+const refresh = async (action: Action) => {
+    let refresh_token = undefined;
+    try {
+        cookie.parse(action.request.headers["cookie"])["lfk_backend__refresh_token"];
+    }
+    catch {
+        throw new IllegalJWTError();
+    }
+
+    let jwtPayload = undefined;
+    try {
+        jwtPayload = <any>jwt.verify(refresh_token, config.jwt_secret);
+    } catch (error) {
+        throw new IllegalJWTError();
+    }
+
+    const user = await getConnectionManager().get().getRepository(User).findOne({ id: jwtPayload["id"], refreshTokenCount: jwtPayload["refreshTokenCount"] }, { relations: ['permissions'] })
+    if (!user) { throw new UserNonexistantOrRefreshtokenInvalidError() }
+
+    let newAccess = JwtCreator.createAccess(user);
+    action.response.header("authorization", "Bearer " + newAccess);
+
+    return await new JwtUser(user);
 }
 export default authchecker

src/jwtcreator.ts

@@ -7,8 +7,8 @@ export class JwtCreator {
     public static createRefresh(user: User, expiry_timestamp?: number) {
         if (!expiry_timestamp) { expiry_timestamp = Math.floor(Date.now() / 1000) + 10 * 36000; }
         return jsonwebtoken.sign({
-            refreshtokencount: user.refreshTokenCount,
-            userid: user.id,
+            refreshTokenCount: user.refreshTokenCount,
+            id: user.id,
             exp: expiry_timestamp
         }, config.jwt_secret)
     }
@@ -22,7 +22,7 @@ export class JwtCreator {
     }
 }
 
-class JwtUser {
+export class JwtUser {
     @IsInt()
     id: number;
 

src/models/actions/RefreshAuth.ts

@@ -23,7 +23,7 @@ export class RefreshAuth {
         } catch (error) {
             throw new IllegalJWTError()
         }
-        const found_user = await getConnectionManager().get().getRepository(User).findOne({ id: decoded["userid"] }, { relations: ['groups', 'permissions'] });
+        const found_user = await getConnectionManager().get().getRepository(User).findOne({ id: decoded["id"] }, { relations: ['groups', 'permissions'] });
         if (!found_user) {
             throw new UserNotFoundError()
         }