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How to make firebase storage only available to users of the app
(2 answers)
Closed 3 years ago.
I need to access read/write images from firebase storage. There is no authentication facility. How can I restrict the data management through app only.
Existing rules to provide public access is
rules_version = '2';
service firebase.storage {
match /b/{bucket}/o {
match /{allPaths=**} {
allow read, write;
}
}
}
There is no way to limit access to the files through the Firebase SDK to your application only. That approach simply doesn't work in a cloud-based environment.
Also see:
Restrict access to Firebase storage so only my app can access it
How to allow only my app to access firebase without a login?
Locking down Firebase DB access to specific apps
How to make firebase storage only available to users of the app (which I just now found, and of which your question is a duplicate)
While these are usually about other Firebase products, the same logic applies to Storage.
You will need to describe in your security rules what can be done to the files in Cloud Storage through the Firebase API, and then (if needed) who can do those things by using Firebase Authentication too.
Note that using Firebase Authentication doesn't necessarily require the user to provide credentials, as Firebase provides an option to sign in anonymously. This simply gives each user a secure, unique ID, which you could for example use to allow users only access to files they uploaded themselves (and many other use-cases).
As per docs
Cloud Storage stores your files in a Google Cloud Storage bucket, making them accessible through both Firebase and Google Cloud
Although firebase directly doesn't support that but google cloud has the option to restrict API to specific application package name signatures only. I tried for MAP sdk, but theoretically storage should work also.
Related
I am really concerned about the security of my data which I would be storing in Firestore, I want to know If someone somehow can extract google-services.json file from my android app or use some other tools to access my Firestore database. Is it possible If yes how can I prevent it?
If your app uses Firebase services and makes use of google-services.json, then yes, anyone can extract that data.
The issue for app developers isn't how to lock down that data (impossible), the issue is how to protect database and storage data to only those users who should be able to access it. The only solution for this is to use Firebase Authentication to verify the identity of people accessing your app, and use security rules to determine who should be able to read and write data.
There are currently no alternatives to this. If you don't require users to sign in using Firebase Auth, and your security rules allow universal access to data, then anyone on the internet who knows the name of your project will be able to access that data. Again, there are no exceptions to this. If your data is readable and writable to the world, then you will need to accept the potential billing consequences for this.
Again, learn about security rules for the products you use: Realtime Database, Firestore, and Cloud Storage.
If security rules are not feasible for your requirements, then you will need to set up a backend service that you securely control, and route all client access through that backend. You will want to make clients pass a Firebase Authentication token to your endpoint so it can validate access using the Firebase Admin SDK.
You should setup Cloud Firestore Security Rules to limit access to the data. Here is an example:
// Allow read/write access on all documents to any user signed in to the application
service cloud.firestore {
match /databases/{database}/documents {
match /{document=**} {
allow read, write: if request.auth.uid != null;
}
}
}
Take a look at Get started with Cloud Firestore Security Rules for more details.
I'm creating app with Firestore database only for Android platform. I want to restrict access to my Firestore database from Rest API.
Is there any way?
There is no way to do this. Firestore does not care where access comes from. It could come from any client SDK, from any server SDK, or the REST API.
The only way to control access from a client SDK is to use security rules along with Firebase Authentication to limit access based on the user's identity. Server SDK access is controlled using service accounts that are granted permission to read and write the database (and they bypass security rules altogether).
Recently I started to learn and work with Firebase and I have a doubt with their Storage Service.
I'm just using Firebase Storage to upload files from my Android App. I'm not using Firebase Auth Service, because I use my own backend for authenticate users.
Firebase Storage is working and the files are being upload with success, but I'm receving a strange warning exception (that's not avoiding the upload to be success):
E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.FirebaseApiNotAvailableException: firebase-auth is not linked, please fall back to unauthenticated mode.
I don't want to create users with Firebase, because I handle this in my backend...
Why I'm faceing this warning? If I need to authenticate users just to stop this warning, can I create a "Application Level User"? I don't need to authenticate separeted users for this because all files are shared among users...
The Firebase SDK for Cloud Storage works with the Firebase Authentication SDK to help the Cloud Storage backend know who the active user is. This is how Cloud Storage security rules work. Without the linkage between these two products, you wouldn't be able to write security rules that allow or reject access to certain users.
If you're not using Firebase Authentication, then you can just ignore that message. But this also means that you have to enable full read and write access to everyone at the path in your storage bucket that your users upload to. In other words, anyone in the world can freely modify your storage bucket, and that could become a problem for your app.
If this isn't what you want, consider using Firebase Auth to do custom authentication with your backend so you can be sure that only authenticated (and possibly authorized) users can modify your storage bucket.
I have two firebase apps. They need to access common files, so the Firebase storage is on one app. What rule should I add in Storage rules so that only these two apps get access and not anyone else? Currently I am using public setting in the rules.
I have images saved to my Firebase storage and I only want users using the app to be able to access them. I don't want to force my users to login just to use the app, so that is not an option.
Since the Firebase back-end services are hosted in the cloud, they are by nature accessible by anyone. There is no way to limit their access to only people that are using the code that you write. Any developer can download the SDK, rewrite your code and use that to access the same back-end services.
That's why you secure access to Firebase data (whether structured data in the database or files in storage) through user-based security. Making your users sign in to the app, means that you can identify who is accessing the data. Once you've authenticated the users, you can use Firebase's security rules (for database or storage) to ensure they can only access the data they're authorized for. They may still be using other code, but you'll at least know who they are and be assured that they can only access the data in ways you authorized.
You can get the best of both worlds (requiring users to be authenticated, without requiring them to log-in) by using anonymous authentication. Just keep in mind that there too, any developer can download the Firebase SDK and authenticate the user anonymously.
For an older discussion on the topic (for the database, but it applies equally to storage), see How to prevent other access to my firebase
Basically you want to change the Rules of your Storage. Under the Firebase console and in Storage there are two tabs in the top of the frame. One that says file and one that says Rules. If you click the Rules tab you will get a view of the code that defines who can read and write to and from your storage. You will want to follow the link below to set up the correct rules for your storage. But based on what you want all you have to do is set the read write code to be:
allow read: if request.auth != null;
Check out this link: https://firebase.google.com/docs/storage/security/user-security