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Documentation/proposals: added a caveats section to upstream refreshing proposal

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This commit is contained in:
Eric Chiang
2016-10-17 11:53:46 -07:00
parent 1e5133a98d
commit 774242f750
1 changed files with 18 additions and 3 deletions
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21
Documentation/proposals/upstream-refreshing.md
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@@ -2,12 +2,12 @@
## TL;DR ## TL;DR
Today, if a user deletes their Google account, dex will keep allowing clients to Today, if a user deletes their GitHub account, dex will keep allowing clients to
refresh tokens on that user's behalf because dex never checks back in with refresh tokens on that user's behalf because dex never checks back in with
Google. GitHub.
This is a proposal to change the connector package so the dex can check back This is a proposal to change the connector package so the dex can check back
in with Google. in with GitHub.
## The problem ## The problem
@@ -148,3 +148,18 @@ func (db passwordDB) Refresh(s connector.Scopes, identity connector.Identity) (c
return identity, nil return identity, nil
} }
``` ```
## Caveats
Certain providers, such as Google, will only grant a single refresh token for each
client + end user pair. The second time one's requested, no refresh token is
returned. This means refresh tokens must be stored by dex as objects on an
upstream identity rather than part of a downstream refresh even.
Right now `ConnectorData` is too general for this since it is only stored with a
refresh token and can't be shared between sessions. This should be rethought in
combination with the [`user-object.md`](./user-object.md) proposal to see if
there are reasonable ways for us to do this.
This isn't a problem for providers like GitHub because they return the same
refresh token every time. We don't need to track a token per client.