What are the best practices for implementing CSP in Go?

What are the best practices for implementing CSP in Go?

When implementing Content Security Policy (CSP) in Go, consider the following best practices: 1. Define a strict policy that only allows resources from trusted sources. 2. Use nonce or hash-based approaches for inline scripts. 3. Regularly review and update your CSP to adapt to new threats. 4. Test your CSP using tools to ensure it works as intended.

Can you explain what nonce and hash-based approaches are?

Sure! A nonce is a random value that you generate for each request and include in your CSP header. It allows specific inline scripts to run while blocking others. Hash-based approaches involve generating a hash of your inline scripts and including that hash in your CSP. This way, only scripts that match the hash will be executed.

How can I test if my CSP is working correctly?

You can test your CSP using browser developer tools to check for any violations. Additionally, tools like CSP Evaluator can help analyze your policy and identify potential issues.

What are common mistakes to avoid when setting up CSP?

Common mistakes include using overly permissive policies, neglecting to test your CSP, and failing to update it regularly as your application evolves.