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owncloud: Add SameSite=Lax config for cross-domain auth (#3245)

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book/src/integrations/oauth2/examples.md
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@ -1,5 +1,9 @@
# Example OAuth2 Configurations # Example OAuth2 Configurations
> [!TIP]
>
> Web applications that authenticate with Kanidm **must** be served over HTTPS.
## Apache `mod_auth_openidc` ## Apache `mod_auth_openidc`
Add the following to a `mod_auth_openidc.conf`. It should be included in a `mods_enabled` folder or Add the following to a `mod_auth_openidc.conf`. It should be included in a `mods_enabled` folder or
@ -651,7 +655,22 @@ To set up an ownCloud instance to authenticate with Kanidm:
kanidm system oauth2 show-basic-secret owncloud kanidm system oauth2 show-basic-secret owncloud
``` ```
7. Create a JSON configuration file (`oidc-config.json`) for ownCloud's OIDC 7. Set [ownCloud's session cookie `SameSite` value to `Lax`][owncloud-samesite]:
* For manual installations, add the option
`'http.cookie.samesite' => 'Lax',` to `config.php`.
* For Docker installations, set the `OWNCLOUD_HTTP_COOKIE_SAMESITE`
environment variable to `Lax`, then stop and start the container.
When ownCloud and Kanidm are on different top-level domains
([as we recommend](../../choosing_a_domain_name.md#subdomains-and-cross-origin-policy)),
ownCloud's default `SameSite=Strict` session cookie policy causes browsers
to drop the session cookie when Kanidm redirects back to ownCloud, which
then causes their OIDC library to
[send an invalid token request to Kanidm][owncloud-session-bug], which
Kanidm (correctly) rejects.
8. Create a JSON configuration file (`oidc-config.json`) for ownCloud's OIDC
App. App.
To key users by UID (most secure configuration, but not suitable if you have To key users by UID (most secure configuration, but not suitable if you have
@ -687,7 +706,7 @@ To set up an ownCloud instance to authenticate with Kanidm:
} }
``` ```
8. Deploy the config file you created with [`occ`][occ]. 9. Deploy the config file you created with [`occ`][occ].
[The exact command varies][occ] depending on how you've deployed ownCloud. [The exact command varies][occ] depending on how you've deployed ownCloud.
@ -726,7 +745,9 @@ login form, which you can use to sign in.
[owncloud-branding]: https://doc.owncloud.com/server/next/admin_manual/enterprise/clients/creating_branded_apps.html [owncloud-branding]: https://doc.owncloud.com/server/next/admin_manual/enterprise/clients/creating_branded_apps.html
[owncloud-oidcsd]: https://doc.owncloud.com/server/next/admin_manual/configuration/user/oidc/oidc.html#set-up-service-discovery [owncloud-oidcsd]: https://doc.owncloud.com/server/next/admin_manual/configuration/user/oidc/oidc.html#set-up-service-discovery
[owncloud-samesite]: https://doc.owncloud.com/server/next/admin_manual/configuration/server/config_sample_php_parameters.html#define-how-to-relax-same-site-cookie-settings
[owncloud-secrets]: https://doc.owncloud.com/server/next/admin_manual/configuration/user/oidc/oidc.html#client-ids-secrets-and-redirect-uris [owncloud-secrets]: https://doc.owncloud.com/server/next/admin_manual/configuration/user/oidc/oidc.html#client-ids-secrets-and-redirect-uris
[owncloud-session-bug]: https://github.com/jumbojett/OpenID-Connect-PHP/issues/453
[owncloud-oauth2-app]: https://marketplace.owncloud.com/apps/oauth2 [owncloud-oauth2-app]: https://marketplace.owncloud.com/apps/oauth2
[owncloud-ios-mdm]: https://doc.owncloud.com/ios-app/12.2/appendices/mdm.html#oauth2-based-authentication [owncloud-ios-mdm]: https://doc.owncloud.com/ios-app/12.2/appendices/mdm.html#oauth2-based-authentication
[occ]: https://doc.owncloud.com/server/next/admin_manual/configuration/server/occ_command.html [occ]: https://doc.owncloud.com/server/next/admin_manual/configuration/server/occ_command.html