Question 1

How to implement JWT authentication with go-guardian?

Accepted Answer

Use the JWT strategy package from Go-Guardian by configuring a secret key and validation options. Check the GoDoc or _examples folder for code snippets on integrating it as middleware in your Go application, including handling custom claims.

Question 2

go-guardian vs gin-jwt for authentication in Go?

Accepted Answer

Go-Guardian is a general-purpose library supporting multiple strategies beyond JWT, while gin-jwt is specific to the Gin framework. Choose Go-Guardian for flexibility across frameworks, but gin-jwt if you're deeply embedded in Gin and need simpler integration.

Question 3

Does go-guardian support social login with OAuth2?

Accepted Answer

Yes, through its OAuth2 strategies like OAuth2-JWT and OAuth2-Introspection, but it requires manual configuration for providers like Google or Facebook. It doesn't offer pre-packaged social login strategies, so some setup is needed.

Question 4

How to add two-factor authentication using go-guardian?

Accepted Answer

Leverage the two-factor strategy that implements TOTP per RFC 6238. Set it up with a secret key and integrate it into your auth flow, as demonstrated in the examples, to enhance security for user logins.

Question 5

go-guardian performance overhead on high-traffic APIs?

Accepted Answer

The library is designed to be lightweight, but performance varies by strategy—e.g., JWT is fast, while LDAP or OAuth2 introspection may add latency. Use caching with libcache to optimize repeated authentications in scalable deployments.

Question 6

Can go-guardian handle session-based authentication?

Accepted Answer

Not directly; it focuses on stateless strategies like JWT and OAuth2. For sessions, you'd need to write a custom strategy or combine it with another session management library, as it doesn't provide built-in session support.

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