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The OIDC add-on that we had written for Shib also provides OAuth2.0 support. </div>
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<div>Even better, but I assume this uses the real storage service and thus makes the IdP stateful, yes? A shim would allow you to make only that piece stateful.</div>
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<div>It's a defensible trade-off in either direction.</div>
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<div>Regardless, the two big caveats:</div>
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<div>A) Over time, this will effectively turn that hostname into an entityID unless their OAuth 2.0 implementation(and any others that come along) supports metadata or discovery. I have a hunch.</div>
<div>B) This is reintroducing the back channel unless you come up with a way to encode nodes into the OAuth tokens and teach a reverse proxy how to read them. There is, AFAIK, no standard way to do that. It's on my wishlist for OAuth, CAS, and more.</div>
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