Need

Implementation of a robust and secure authentication mechanism

Context

• Usage of Scala for building scalable and functional applications
• Usage of play.api.mvc for handling HTTP requests and responses in Play Framework

Description

Non compliant code

        import play.api.mvc._

object Application extends Controller {

  def unprotectedResource = Action {
    Ok("This is a protected resource.")
  }
}
        
        

The above code is a simple Play Framework application with a single endpoint unprotectedResource. This endpoint doesn't require any form of authentication. This means that any user, authenticated or not, can access this endpoint.

The unprotectedResource function uses the Action function to handle HTTP requests and responds with a simple string message "This is a protected resource.". Since there is no authentication mechanism in place, any request to this endpoint will be accepted and the response will be sent. This makes the resource unprotected and accessible to anyone.

The absence of an authentication mechanism means that there is no way to verify the identity of the user making the request. This makes the system vulnerable to unauthorized access and potential data breaches.

Steps

• Implement an authentication mechanism to verify the identity of the user.
• Use a secure and robust authentication method, such as username/password authentication or token-based authentication.
• Ensure that all sensitive resources and endpoints are protected by the authentication mechanism.
• Enforce authentication before granting access to protected resources.
• Implement proper session management to maintain the user's authenticated state.
• Consider implementing additional security measures, such as multi-factor authentication or rate limiting, to enhance the overall security of the authentication mechanism.

Compliant code

        import play.api.mvc._
import play.api.mvc.Security.Authenticated

object Application extends Controller {

  def isAuthenticated(request: RequestHeader) = {
    // Implement your authentication logic here
    // For example, check if the user is logged in and has a valid session
    // Return true if the user is authenticated, false otherwise
  }

  def onUnauthorized(request: RequestHeader) = {
    // Implement your unauthorized response here
    // For example, redirect the user to the login page
    Results.Redirect(routes.Application.login())
  }

  def AuthenticatedAction = Authenticated(isAuthenticated, onUnauthorized) { user =>
    Action { request =>
      Ok("This is a protected resource.")
    }
  }

  def unprotectedResource = AuthenticatedAction
}
        
        

The updated code introduces an authentication mechanism to the application. The isAuthenticated function is used to check if a user is authenticated. This function should contain the logic for verifying the user's identity, such as checking if the user has a valid session.

The onUnauthorized function is used to handle cases where a user is not authorized to access a resource. This function should contain the logic for responding to unauthorized access attempts, such as redirecting the user to a login page.

The AuthenticatedAction function is a wrapper around the Action function that enforces authentication. This function takes the isAuthenticated and onUnauthorized functions as parameters and uses them to enforce authentication before granting access to the protected resource.

The unprotectedResource function now uses the AuthenticatedAction function to enforce authentication before granting access to the protected resource. This ensures that only authenticated users can access this resource.

This code provides a basic authentication mechanism for the application. Depending on the specific requirements of your application, you may need to implement additional security measures, such as multi-factor authentication or rate limiting.

References

• 006. Authentication mechanism absence or evasion