Flutter SSL Pinning Example

• This project demonstrates how to implement SSL pinning in a Flutter application using the dio package to secure network requests. SSL pinning ensures that communication is only established with a trusted server, protecting against man-in-the-middle (MITM) attacks.

What is SSL Pinning?

• SSL pinning is a security technique used in mobile (or client) applications to associate a server's SSL/TLS certificate or public key directly with the app. This prevents attackers from intercepting or manipulating data by impersonating the server, even if they manage to obtain a valid certificate for the server.

• By using SSL pinning, your app ensures that it only communicates with the specific server it trusts, making it more resistant to attacks that rely on compromised networks or certificates.

Key Features

• SSL pinning implemented using the dio package

• Enhances security by validating server certificates before making network requests

• Protects against man-in-the-middle attacks and compromised certificate authorities (CAs)

Installation

1. Clone the repository:

git clone https://github.com/yourusername/flutter-ssl-pinning-example.git

2. Navigate to the project directory:

cd flutter-ssl-pinning-example

3. Install dependencies:

flutter pub get

Example

1. Add the SSL Certificate to Assets
   • Place your server’s SSL certificate file inside the assets folder of your project.
2. Configure the Security Context
   • Use a SecurityContext to manage and configure TLS/SSL settings for your app.
   • Load the certificate from assets and set it as a trusted certificate in the SecurityContext.
   • This effectively pins the server’s certificate and ensures that only this trusted certificate is accepted for SSL connections.
3. Use the Custom Security Context in Dio
   • Attach the configured SecurityContext to a custom HttpClient.
   • Override the badCertificateCallback to reject all untrusted certificates.