Скачать или смотреть How to Change Password of a Firebase User in Flutter

Learn how to securely change the password of a Firebase user in Flutter, ensuring old password verification for better security.
---
This video is based on the question https://stackoverflow.com/q/66505004/ asked by the user 'moe' ( https://stackoverflow.com/u/10086934/ ) and on the answer https://stackoverflow.com/a/66505451/ provided by the user 'TDN' ( https://stackoverflow.com/u/14169289/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Change password of firebase user in flutter

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Changing a User's Password in Firebase with Flutter

Managing user accounts effectively is crucial in any application, and password management is a fundamental aspect of user security. If you're working with Firebase Authentication in Flutter, you may find yourself needing to enable users to change their passwords. However, a common requirement is to ensure that users verify their old password before they can set a new one. In this guide, we’ll walk through how to implement this functionality step-by-step.

Problem Overview

When implementing password change features, it's important to prevent unauthorized access. This is why verifying the old password is essential. In the initial provided code, password changing functionality was present, but it lacked the mechanism for confirming the old password. This can lead to security vulnerabilities.

Solution Steps

To change a user's password while ensuring that the old password is verified, we will follow these steps:

Get the Current User: Retrieve the currently logged-in user.

Prompt for Old Password: Allow the user to input their old password.

Sign In Using Old Password: Attempt to sign in with the old password. If this fails, the password change will not proceed.

Update the Password: If the old password is verified, proceed to update the password to the new one.

Step-by-Step Implementation

Let's take a look at the revised code that implements this functionality:

[[See Video to Reveal this Text or Code Snippet]]

Code Breakdown

FirebaseUser Retrieval: We fetch the current user with FirebaseAuth.instance.currentUser() and retrieve their email.

Old Password Input: You should have a field in your app where the user enters their old password. This value is passed to the method.

Sign In Verification: Using the signInWithEmailAndPassword() method, we attempt to authenticate the user with the old password. If they provide the wrong old password, a FirebaseAuthException is thrown, preventing the password change and alerting the user to the failure.

Password Update: If the sign-in is successful, the new password is applied using updatePassword() after confirming the old password.

Conclusion

By implementing old password verification before allowing users to change their password, you can greatly enhance the security of your application. By following the code and steps outlined above, you can successfully create a robust password management feature within your Flutter app using Firebase Authentication. Remember that handling exceptions properly not only helps in improving user experience but also in maintaining security standards.

Feel free to implement these practices in your app, and ensure your users enjoy a secure environment while managing their account information!