[woodruffw]

There is a technical reason for it, and it’s explained in an adjacent thread. Accepting every single small-scale IdP would result in a strictly worse security posture for PyPI as a whole, with no actual benefit to small instances (who are better off provisioning API tokens the normal way instead of using Trusted Publishing).

[chippiewill]

I don't think that's a technical reason, that's more of a social reason about trust. Adding configurable JWT issuers is not technically hard or difficult to do in a way that doesn't compromise PyPI's inherent security. There's a configuration difficulty, but those using it will generally know what they're doing and it only compromises their own packages (which they can already compromise by losing tokens etc.)

I disagree with your assessment that provisioning API tokens is better than being able to authenticate with a JWT. It makes managing credentials in an organisation much easier as far fewer people need access to the signing key compared to who would need access to the API token. Using asymmetric keys also means there's less opportunity for keys to be leaked.

[woodruffw]

Adding another IdP is not the hard part; establishing the set of claims that IdP should be presenting to interoperate with PyPI is. The technical/social distinction is specious in this context: the technical aspects are hard because the social aspects are hard, and vice versa.

If you work in a large organization that has the ability to maintain a PKI for OIDC, you should open an issue on PyPI discussing its possible inclusion as a supported provider. The docs[1] explain the process and requirements.

[1]: https://docs.pypi.org/trusted-publishers/internals/

[Spivak]

> who are better off provisioning API tokens the normal way

As long as those packages get digital attestation, perhaps attested by PyPI itself post-upload or from a well-known user provided key similar to how GPG worked but managed by PyPI this time.

Surely you see how this is creating two classes of packages, where the favored one requires you use a blessed 3rd party?

[woodruffw]

No, I don't. There's no plan, and there will be no plan, to make installers reject packages that don't have attestations. Doing so is technically and socially impossible, and undesirable to boot.

The strongest possible version of this is that projects that do provide attestations will be checked by installers for changes in identity (or regression in attestations). In other words, this feature will only affect packages that opt to provide attestations. And even that is uncertain, since Python packaging is devolved and neither I (nor anybody else involved in this effort) has literally any ability to force installers to do anything.