Email Addresses as OpenIDs « hueniverse
So, to summarize, OpenID User Discovery for email addresses and other email-like identifiers might work like this:
- The RP starts with a user identifier acct:bob@example.com (either because the user typed their email address bob@example.com into a login form, or because the RP received an OpenID assertion about the claimed id acct:bob@example.com).
- The RP fetches the host-meta for example.com, and looks for a of rel-type “describedby”.
- The RP applies the URI acct:bob@example.com to that , and obtains a URL from which to fetch the meta-data for acct:bob@example.com.
- The XRD obtained from that URL (which is for subject acct:bob@example.com) points to the OpenID endpoint.
via hueniverse.com
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