Secure your desktop application with OAuth by enabling HTTPS on localhost

I am currently in the process of developing a desktop application that integrates with Spotify's oauth api using the implicit grant flow as outlined here:

My plan is to incorporate an "Authenticate" button, which when clicked will open the user's default browser for them to login and authorize the connection with Spotify. Subsequently, they will be redirected to a specific URL.

The redirect URL I intend to use is 127.0.0.1:58212 or another port on the loopback device.

However, my main query pertains to whether it is imperative to utilize HTTPS for this operation?

After careful consideration, I am inclined towards implementing HTTPS for two primary reasons; firstly, to ensure the security of the access token, as other users on the system may intercept the message being sent. Secondly, due to the potential threat of ports being compromised while the user logs in.

Therefore, securing the communication through SSL encryption seems necessary, along with verifying the authenticity of the communication link.

In regards to generating certificates for each instance of the application mandatorily, and informing the computer to trust these certificates for the duration of the application's lifecycle, remains a concern for me.

An alternative approach could involve creating the certificate during app installation, followed by steps prompting the system to recognize and accept the newly generated certificate.

I seek confirmation on whether my current thought process aligns with the best practices or if there are better alternatives worth exploring?

My development stack comprises electron and express in JavaScript for crafting the application.

Your insights and guidance on this matter would be greatly appreciated.

Answer №1

When it comes to securely utilizing Oauth with installed applications like desktop apps, the most recommended approach is to employ the Oauth 2 flow specifically designed for installed applications. However, keep in mind that this mechanism would need to be set up by the service provider. Google offers support for this particular option.

For more information on using Oauth with installed applications, you can visit this link.

Regrettably, not all services have implemented OAuth2 yet.

If you opt for using Oauth 1.0 with installed applications, instead of being redirected to a callback url, the service provider will present an authorization code to the user, which can then be manually copied and pasted into the desktop application. Take a look at Trello's Oauth integration as an example of this process.

Keep in mind that the Web Api flow you may be attempting to achieve is not suitable for desktop applications. The redirect URI 127.0.0.1:port serves as your local URI. For the service provider to redirect the flow back to your system, they would require, at minimum, your public IP address.

Answer №2

In my opinion, when developing a Desktop or native app, it is recommended to utilize the Oauth authorization code flow instead of the implicit grant. The implicit grant is more suitable for use on a device browser rather than within a Web View.

If your app relies on a Web Service for connectivity, make sure that your Web Service has a redirect URL with https protocol. Fortunately, many hosting platforms like Heroku offer this feature at no extra cost (otherwise, acquiring an SSL certificate can be quite challenging).

With the authorization code flow, all tokens are securely stored in the backend without being exposed to the client.

Many services allow testing on localhost using http, but it's essential to follow best practices for secure interaction. I have put together a helpful tutorial that outlines the flow in detail.

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