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SAML: A fractal of bad design

353 points · 190 comments · aray07

  1. jmbwell · · focus · HN ↗
    It’s such a product of “Ooh! Markup languages! What can we use a markup language to solve!” When authentication is just not a document or data stream that needs marked-up.

    The article rightly connects this to XML, which was indeed the hammer to everything’s nail at the time

    I think we aren’t done with this problem yet, though. OIDC makes a lot of assumptions in service to Google and others. And tailscale as mentioned, despite “holding the line,” already reveals the cracks when things like GitHub accounts have to be treated differently from others.

    What we are missing is a provider-independent way to do this. I should be able to create an account and log in just about anywhere using a backend I control. It can be done, but not with what we have today

    1. blm126 · · focus · HN ↗
      OpenID Connect actually has all the machinery needed to support federated login as part of its dynamic discovery and dynamic registration specifications. The issue is that absolutely no one uses them or implements them.

      Smaller tech companies don't want federated login to happen. They are, as a rule, far to happy to rely on the SSO tax to up-sell enterprise customers. The major authentication companies don't want federated login to happy because it invites more competitors and threatens their absurd margins.

      Until someone manages to solve the business side, no amount of improved technology will change a thing. I'm pretty sure the few small interoperability gaps OpenID Connect has could be corrected in a matter of months if the stakeholders actually cared.

      1. edoceo · · focus · HN ↗
        Why haven't (we?) these federation features been used?
        1. xp84 · · focus · HN ↗
          Federation sounds like decentralization to me. Decentralized is like a dirty word when you’re in the business of either selling SaaS or pushing private citizens to go all in on the GOOG/AAPL/MSFT ecosystems. And everyone with any influence over what gets adopted and used, is in those categories.
        2. preisschild · · focus · HN ↗
          They are being used. Workload Identity Federation is often used to assign oidc identities to workloads and the Client ID Metadata Document (basically dynamic client registration) is used in protocols such as MCP and atproto
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