Firebase Permission denied (read and write) with Authentication

Question

I want to read and write in my database with authentication but I got a Permission denied for both. I'm trying to figure out why it's not working.

I used the default rules since I want authentication, as explained in the doc.

The default rules require Authentication. They allow full read and write > access to authenticated users of your app. They are useful if you want data open > to all users of your app but don't want it open to the world.

• Firebase rules :

   { "rules": { ".read": "auth != null", ".write": "auth != null" } } 

• Create user :

    auth.createUserWithEmailAndPassword(email, password) .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() { @Override public void onComplete(@NonNull Task<AuthResult> task) { Log.d("USER_CREATE", "createUserWithEmail:onComplete:" + task.isSuccessful()); // If sign in fails, display a message to the user. If sign in succeeds // the auth state listener will be notified and logic to handle the // signed in user can be handled in the listener. if (!task.isSuccessful()) { Toast.makeText(getApplicationContext(), "Authentication failed.", Toast.LENGTH_SHORT).show(); } else { startActivity(new Intent(SignupActivity.this, MainActivity.class)); finish(); } // ... } }); 

• Sign in user :

   auth.signInWithEmailAndPassword(email, password) .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() { @Override public void onComplete(@NonNull Task<AuthResult> task) { Log.d("COMPLETE", "signInWithEmail:onComplete:" + task.isSuccessful()); } }); 

I got an AuthListener and it logs me that the user is signed in.

• AuthListener :

   mAuthListener = new FirebaseAuth.AuthStateListener() { @Override public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) { FirebaseUser user = firebaseAuth.getCurrentUser(); if (user != null) { // User is signed in Log.d("TAG", "onAuthStateChanged:signed_in:" + user.getUid()); } else { // User is signed out Log.d("TAG", "onAuthStateChanged:signed_out"); } // ... } }; // ... 

• Read test : (with a node I manually added in the database)

   firebase.child("test").addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot snapshot) { Log.d("result", snapshot.getValue()+""); } @Override public void onCancelled(FirebaseError error) { Log.d("The read failed: ", error.getMessage()); } }); 

• Write test : I want a main node users with two categories of users : devs and employers .

   Firebase usersRef = firebase.child("users").child("devs"); FirebaseUser user = auth.getCurrentUser(); Map<String, String> userMap = new HashMap<String, String>(); userMap.put("name", "blabla"); userMap.put("city", "Brussels"); Map<String, Map<String, String>> users = new HashMap<String, Map<String, String>>(); users.put(user.getUid().toString(), userMap); usersRef.setValue(users); 

• Logs :

   D/AUTH LISTENER: onAuthStateChanged:signed_in:wnomkwiOWOb4wNNLSsrWeT5xxUq1 D/USER_CREATE: createUserWithEmail:onComplete:true I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead. D/ACTION BAR?: android.support.v7.app.ToolbarActionBar@36c3cd2a W/SyncTree: Listen at /test failed: FirebaseError: Permission denied D/The read failed:: Permission denied D/FirebaseAuth: Notifying listeners about user ( wnomkwiOWOb4wNNLSsrWeT5xxUq1 ). D/FirebaseAuth: Notifying listeners about user ( wnomkwiOWOb4wNNLSsrWeT5xxUq1 ). D/FirebaseApp: Notifying auth state listeners. D/FirebaseApp: Notified 0 auth state listeners. D/AUTH LISTENER: onAuthStateChanged:signed_in:wnomkwiOWOb4wNNLSsrWeT5xxUq1 D/FirebaseApp: Notifying auth state listeners. D/FirebaseApp: Notified 0 auth state listeners. D/AUTH LISTENER: onAuthStateChanged:signed_in:wnomkwiOWOb4wNNLSsrWeT5xxUq1 D/COMPLETE: signInWithEmail:onComplete:true 

I made those 2 tests with public permission (write : true, read : true) and it was working, so something must be wrong with my authentication. I'm probably misunderstanding/missing something but don't really see what exactly. Would be very nice If someone would like to enlighten me!

Answer 1

You're mixing the old Firebase SDK with the new Firebase SDK. Remove firebase-android-sdk 2.5.2 from your build.gradle and update your imports to use the new DatabaseReference class instead of the Firebase class.

Answer 2

I am using com.google.firebase:firebase-admin:6.5.0. I have set following rules in firebase.

{
  "rules": {
    ".read": true,
    ".write": true
  }
}

Still I am getting

PersistentConnection: pc_0 - Authentication failed: permission_denied (Access denied.).