mirror of https://github.com/go-gitea/gitea.git
b1bfca39f1
This PR adds an External ID Claim Name configuration field to the OIDC auth source. When set, Gitea uses the specified JWT claim as the user's `ExternalID` instead of the default `sub` claim. This PR fixes the bug when migrating from Azure AD V2 to OIDC. When an admin migrates the same auth source to OIDC, goth's `openidConnect` provider defaults to using the `sub` claim as `UserID`. However, Azure AD's `sub` is a pairwise identifier: > `sub`: The subject is a pairwise identifier and is unique to an application ID. If a single user signs into two different apps using two different client IDs, those apps receive two different values for the subject claim. https://learn.microsoft.com/en-us/entra/identity-platform/id-token-claims-reference#payload-claims As a result, every existing user appears as a new account after migration. To fix this issue, Gitea should use `oid` claim for `UserID`. > `oid`: This ID uniquely identifies the user across applications - two different applications signing in the same user receives the same value in the oid claim. Note: The `oid` claim is not included in Azure AD tokens by default. The `profile` scope must be added to the Scopes field of the auth source. |
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