Back to Blog
Sabnzbd nginx6/8/2023 NGINX performing token validation as a reverse proxy Behavior is consistent for every error condition, including missing or invalid tokens.Only the NGINX instance (not every app) need be registered with the IdP.Existing backend services can be protected with access tokens, without requiring code changes.Requests reach the backend services only when the client has presented a valid token.To avoid code duplication and the resulting problems, we can use NGINX to validate access tokens on behalf of backend services. Invalid or unexpected characters in access tokenīackend applications performing token validation Using the NGINX auth_request Module to Validate Tokens.Consider how each backend service might handle the following error conditions: Various error conditions and edge cases need to be accounted for, and doing so in each backend service is a recipe for inconsistency in implementation and consequently an unpredictable user experience. Regardless of which token format is used, performing validation at each backend service or application results in a lot of duplicated code and unnecessary processing. It is supported by many of the leading IdP vendors and cloud providers. RFC 7662, OAuth 2.0 Token Introspection, is now a widely supported standard that describes a JSON/REST interface that a Relying Party uses to present a token to the IdP, and describes the structure of the response. The standard method for validating access tokens with an IdP is called token introspection. References to NGINX Plus apply only to that product. For NGINX Plus, we also show how the cache can be distributed across a cluster of NGINX Plus instances, by updating the key‑value store with the JavaScript module, as introduced in NGINX Plus R18.Įxcept where noted, the information in this blog applies to both NGINX Open Source and NGINX Plus. We discuss the various benefits of using NGINX and NGINX Plus for this task, and how the user experience can be improved by caching validation responses for a short time. In this blog we describe how NGINX and NGINX Plus can act as an OAuth 2.0 Relying Party, sending access tokens to the IdP for validation and only proxying requests that pass the validation process. Global logout might also make it necessary to validate JWTs with the IdP. However, this has the advantage that such tokens can be revoked by the IdP, for example as part of a global logout operation, without leaving previously logged‑in sessions still active. Opaque tokens, on the other hand, must be validated by sending them back to the IdP that issued them. The NGINX Plus auth_jwt module performs offline JWT validation. Typically, a JWT also includes an expiry date which can also be checked. Because IdPs cryptographically sign the JWTs they issue, JWTs can be validated “offline” without a runtime dependency on the IdP. Validation of the access token is required to ensure that it was indeed issued by a trusted identity provider (IdP) and that it has not expired.
0 Comments
Read More
Leave a Reply. |