Generating SHA-1 Key in Flutter

SHA-1 (Secure Hash Algorithm) is a cryptographic hash that acts as a unique identifier for your application. In Flutter, SHA keys are commonly used when integrating services like Firebase, Google Maps API, and other Google services.

• SHA-1 generates a 160-bit hash value that helps verify the authenticity of your application.
• These keys allow external services to confirm that requests are coming from your verified app.
• They are commonly required for services like: Firebase Authentication, Google Sign-In, Google Maps API, Dynamic Links and other Google services.
• If you are developing a professional or production application, avoid sharing your SHA keys publicly.
• Exposing these keys may allow unauthorized access or misuse of your application’s services.

For example, when adding Firebase to a Flutter project, you must provide the SHA-1 and SHA-256 keys in the Firebase Console during the setup process.

Security Note: SHA-1 is considered insecure for modern cryptographic applications because it is vulnerable to collision attacks. Therefore, SHA-256 is recommended as it generates a stronger 256-bit hash value.

• Generates a 256-bit hash value, making it more resistant to collisions and attacks.
• Widely used for secure digital signatures.
• Used in message authentication and modern security implementations.

There are multiple ways to generate SHA-1 and SHA-256 keys. However, in Flutter projects, both keys can be generated easily using a single command inside the project’s Android directory.

Implementation

Follow the steps below to generate the SHA-1 and SHA-256 keys for your Flutter application.

Step 1: Open Your Flutter Project

First open your Flutter Project, then go to the terminal which is located at the bottom of your project.

Step 2: Navigate to the Android Folder

Next step is to open the terminal and type the command in the terminal cd android.

Step 3: Run the Signing Report Command

Now the most important step is to type the command ./gradlew signingReport

This command generates a signing report that includes important information such as:

• Variant name
• Package name
• SHA-1 fingerprint
• SHA-256 fingerprint

Note: For security purposes, we have removed some digits of the SHA-1 key and SHA-256 as it may result in a data breach of the App. Majorly one command is we have to write and SHA-1 and SHA-256 keys on the fingertip. Its main use is that the inputted data is very hard to decode and our app data is encrypted and can be shared where it is needed. For when we have to store the details of our customers on Firebase.