Proof-of-concept implementation of a potential new Supervisor feature
which allows arbitrary upstream ID token claims to be mapped into a
new top-level claim in the ID tokens issued by the Supervisor.
When the token exchange grant type is used to get a cluster-scoped
ID token, the returned token has a new audience value. The client ID
of the client which performed the authorization was lost. This didn't
matter before, since the only client was `pinniped-cli`, but now that
dynamic clients can be registered, the information would be lost in the
cluster-scoped ID token. It could be useful for logging, tracing, or
auditing, so preserve the information by putting the client ID into the
`azp` claim in every ID token (authcode exchange, clsuter-scoped, and
refreshed ID tokens).
- For backwards compatibility with older Pinniped CLIs, the pinniped-cli
client does not need to request the username or groups scopes for them
to be granted. For dynamic clients, the usual OAuth2 rules apply:
the client must be allowed to request the scopes according to its
configuration, and the client must actually request the scopes in the
authorization request.
- If the username scope was not granted, then there will be no username
in the ID token, and the cluster-scoped token exchange will fail since
there would be no username in the resulting cluster-scoped ID token.
- The OIDC well-known discovery endpoint lists the username and groups
scopes in the scopes_supported list, and lists the username and groups
claims in the claims_supported list.
- Add username and groups scopes to the default list of scopes
put into kubeconfig files by "pinniped get kubeconfig" CLI command,
and the default list of scopes used by "pinniped login oidc" when
no list of scopes is specified in the kubeconfig file
- The warning header about group memberships changing during upstream
refresh will only be sent to the pinniped-cli client, since it is
only intended for kubectl and it could leak the username to the
client (which may not have the username scope granted) through the
warning message text.
- Add the user's username to the session storage as a new field, so that
during upstream refresh we can compare the original username from the
initial authorization to the refreshed username, even in the case when
the username scope was not granted (and therefore the username is not
stored in the ID token claims of the session storage)
- Bump the Supervisor session storage format version from 2 to 3
due to the username field being added to the session struct
- Extract commonly used string constants related to OIDC flows to api
package.
- Change some import names to make them consistent:
- Always import github.com/coreos/go-oidc/v3/oidc as "coreosoidc"
- Always import go.pinniped.dev/generated/latest/apis/supervisor/oidc
as "oidcapi"
- Always import go.pinniped.dev/internal/oidc as "oidc"
This is only a first commit towards making this feature work.
- Hook dynamic clients into fosite by returning them from the storage
interface (after finding and validating them)
- In the auth endpoint, prevent the use of the username and password
headers for dynamic clients to force them to use the browser-based
login flows for all the upstream types
- Add happy path integration tests in supervisor_login_test.go
- Add lots of comments (and some small refactors) in
supervisor_login_test.go to make it much easier to understand
- Add lots of unit tests for the auth endpoint regarding dynamic clients
(more unit tests to be added for other endpoints in follow-up commits)
- Enhance crud.go to make lifetime=0 mean never garbage collect,
since we want client secret storage Secrets to last forever
- Move the OIDCClient validation code to a package where it can be
shared between the controller and the fosite storage interface
- Make shared test helpers for tests that need to create OIDC client
secret storage Secrets
- Create a public const for "pinniped-cli" now that we are using that
string in several places in the production code
When response_mode=form_post is requested, some error cases will be
returned to the client using the form_post web page to POST the result
back to the client's redirect URL.
Also fix some test failures on the callback handler, register the
new login handler in manager.go and add a (half baked) integration test
Signed-off-by: Margo Crawford <margaretc@vmware.com>
Also refactor oidc downstreamsessiondata code to be shared between
callback handler and auth handler.
Signed-off-by: Ryan Richard <richardry@vmware.com>
Highlights from this dep bump:
1. Made a copy of the v0.4.0 github.com/go-logr/stdr implementation
for use in tests. We must bump this dep as Kube code uses a
newer version now. We would have to rewrite hundreds of test log
assertions without this copy.
2. Use github.com/felixge/httpsnoop to undo the changes made by
ory/fosite#636 for CLI based login flows. This is required for
backwards compatibility with older versions of our CLI. A
separate change after this will update the CLI to be more
flexible (it is purposefully not part of this change to confirm
that we did not break anything). For all browser login flows, we
now redirect using http.StatusSeeOther instead of http.StatusFound.
3. Drop plog.RemoveKlogGlobalFlags as klog no longer mutates global
process flags
4. Only bump github.com/ory/x to v0.0.297 instead of the latest
v0.0.321 because v0.0.298+ pulls in a newer version of
go.opentelemetry.io/otel/semconv which breaks k8s.io/apiserver.
We should update k8s.io/apiserver to use the newer code.
5. Migrate all code from k8s.io/apimachinery/pkg/util/clock to
k8s.io/utils/clock and k8s.io/utils/clock/testing
6. Delete testutil.NewDeleteOptionsRecorder and migrate to the new
kubetesting.NewDeleteActionWithOptions
7. Updated ExpectedAuthorizeCodeSessionJSONFromFuzzing caused by
fosite's new rotated_secrets OAuth client field. This new field
is currently not relevant to us as we have no private clients.
Signed-off-by: Monis Khan <mok@vmware.com>
- changed to use custom authenticators.Response rather than the k8s one
that doesn't include space for a DN
- Added more checking for correct idp type in token handler
- small style changes
Signed-off-by: Margo Crawford <margaretc@vmware.com>
This stores the user DN in the session data upon login and checks that
the entry still exists upon refresh. It doesn't check anything
else about the entry yet.
- Requiring refresh tokens to be returned from upstream OIDC idps
- Storing refresh tokens (for oidc) and idp information (for all idps) in custom session data during authentication
- Don't pass access=offline all the time
- throw an error when prompt=none because the spec says we can't ignore
it
- ignore the other prompt params
Signed-off-by: Ryan Richard <richardry@vmware.com>
This will allow us to store custom data inside the fosite session
storage for all downstream OIDC sessions.
Signed-off-by: Margo Crawford <margaretc@vmware.com>
- Add `AllowPasswordGrant` boolean field to OIDCIdentityProvider's spec
- The oidc upstream watcher controller copies the value of
`AllowPasswordGrant` into the configuration of the cached provider
- Add password grant to the UpstreamOIDCIdentityProviderI interface
which is implemented by the cached provider instance for use in the
authorization endpoint
- Enhance the IDP discovery endpoint to return the supported "flows"
for each IDP ("cli_password" and/or "browser_authcode")
- Enhance `pinniped get kubeconfig` to help the user choose the desired
flow for the selected IDP, and to write the flow into the resulting
kubeconfg
- Enhance `pinniped login oidc` to have a flow flag to tell it which
client-side flow it should use for auth (CLI-based or browser-based)
- In the Dex config, allow the resource owner password grant, which Dex
implements to also return ID tokens, for use in integration tests
- Enhance the authorize endpoint to perform password grant when
requested by the incoming headers. This commit does not include unit
tests for the enhancements to the authorize endpoint, which will come
in the next commit
- Extract some shared helpers from the callback endpoint to share the
code with the authorize endpoint
- Add new integration tests
See RFC6648 which asks that people stop using `X-` on header names.
Also Matt preferred not mentioning "IDP" in the header name.
Signed-off-by: Matt Moyer <moyerm@vmware.com>
- Bad usernames and passwords aren't really errors, since they are
based on end-user input.
- Other kinds of authentication failures are caused by bad configuration
so still treat those as errors.
- Empty usernames and passwords are already prevented by our endpoint
handler, but just to be safe make sure they cause errors inside the
authenticator too.
- When the upstream IDP is an LDAP IDP and the user's LDAP username and
password are received as new custom headers, then authenticate the
user and, if authentication was successful, return a redirect with
an authcode. Handle errors according to the OAuth/OIDC specs.
- Still does not support having multiple upstream IDPs defined at the
same time, which was an existing limitation of this endpoint.
- Does not yet include the actual LDAP authentication, which is
hidden behind an interface from the point of view of auth_handler.go
- Move the oidctestutil package to the testutil directory.
- Add an interface for Fosite storage to avoid a cyclical test
dependency.
- Add GetURL() to the UpstreamLDAPIdentityProviderI interface.
- Extract test helpers to be shared between callback_handler_test.go
and auth_handler_test.go because the authcode and fosite storage
assertions should be identical.
- Backfill Content-Type assertions in callback_handler_test.go.
Signed-off-by: Andrew Keesler <akeesler@vmware.com>
This is a bit more clear. We're changing this now because it is a non-backwards-compatible change that we can make now since none of this RFC8693 token exchange stuff has been released yet.
There is also a small typo fix in some flag usages (s/RF8693/RFC8693/)
Signed-off-by: Matt Moyer <moyerm@vmware.com>
