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✨ Add user warrants #3156

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Jan 26, 2025
Merged

✨ Add user warrants #3156

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7aff292
Bump kube
sttts Jan 20, 2025
b6b9e1a
authz: add warrants
sttts Jan 24, 2025
f5f369f
virtual/apiexport: pass through request user with additional warrent …
sttts Aug 22, 2024
30834fe
authorizer/webhook: call webhook for each user after flattening warra…
sttts Jan 25, 2025
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31 changes: 31 additions & 0 deletions docs/content/concepts/authorization/authorizers.md
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Expand Up @@ -330,3 +330,34 @@ When impersonating a user in a logical cluster, the resulting user identity is
scoped to the logical cluster the impersonation is happening in.

A scope mismatch does not invalidate the warrants (see next section) of a user.

### Warrants

Warrants are a way to grant extra access to a user. It can be limited by the scope of a logical cluster.
A warrant is attached by adding a `authorization.kcp.io/warrant` extra field to the user identity
with a JSON-encoded user info, and the limiting logical cluster set as `authentication.kcp.io/scopes: cluster:<logical-cluster>`.
in the embedded user info's extra. The warrant is then checked by the authorizers in the chain of every step
if the primary users is not allowed. For example:

```yaml
user: user1
groups: ["group1"]
extra:
authorization.kcp.io/warrant: |
{
"user": "user2",
"groups": ["group2"],
"extra": {
"authentication.kcp.io/scopes": "cluster:logical-cluster-1"
}
}
```

This warrant allows `user1` to act under the permissions of `user2` in
`logical-cluster-1` if `user1` is not allowed to act as `user2` in the first place.

Note that a warrant only allow to act under the permissions of the warrant user,
but not to act as the warrant user itself. E.g. in auditing or admission control,
the primary user is still the one that is acting.

Warrants can be nested, i.e. a warrant can contain another warrant.
64 changes: 32 additions & 32 deletions go.mod
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Expand Up @@ -168,36 +168,36 @@ require (

replace (
github.com/kcp-dev/kcp/sdk => ./sdk
k8s.io/api => github.com/kcp-dev/kubernetes/staging/src/k8s.io/api v0.0.0-20250116190004-350c910bca8d
k8s.io/apiextensions-apiserver => github.com/kcp-dev/kubernetes/staging/src/k8s.io/apiextensions-apiserver v0.0.0-20250116190004-350c910bca8d
k8s.io/apimachinery => github.com/kcp-dev/kubernetes/staging/src/k8s.io/apimachinery v0.0.0-20250116190004-350c910bca8d
k8s.io/apiserver => github.com/kcp-dev/kubernetes/staging/src/k8s.io/apiserver v0.0.0-20250116190004-350c910bca8d
k8s.io/cli-runtime => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cli-runtime v0.0.0-20250116190004-350c910bca8d
k8s.io/client-go => github.com/kcp-dev/kubernetes/staging/src/k8s.io/client-go v0.0.0-20250116190004-350c910bca8d
k8s.io/cloud-provider => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cloud-provider v0.0.0-20250116190004-350c910bca8d
k8s.io/cluster-bootstrap => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cluster-bootstrap v0.0.0-20250116190004-350c910bca8d
k8s.io/code-generator => github.com/kcp-dev/kubernetes/staging/src/k8s.io/code-generator v0.0.0-20250116190004-350c910bca8d
k8s.io/component-base => github.com/kcp-dev/kubernetes/staging/src/k8s.io/component-base v0.0.0-20250116190004-350c910bca8d
k8s.io/component-helpers => github.com/kcp-dev/kubernetes/staging/src/k8s.io/component-helpers v0.0.0-20250116190004-350c910bca8d
k8s.io/controller-manager => github.com/kcp-dev/kubernetes/staging/src/k8s.io/controller-manager v0.0.0-20250116190004-350c910bca8d
k8s.io/cri-api => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cri-api v0.0.0-20250116190004-350c910bca8d
k8s.io/cri-client => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cri-client v0.0.0-20250116190004-350c910bca8d
k8s.io/csi-translation-lib => github.com/kcp-dev/kubernetes/staging/src/k8s.io/csi-translation-lib v0.0.0-20250116190004-350c910bca8d
k8s.io/dynamic-resource-allocation => github.com/kcp-dev/kubernetes/staging/src/k8s.io/dynamic-resource-allocation v0.0.0-20250116190004-350c910bca8d
k8s.io/endpointslice => github.com/kcp-dev/kubernetes/staging/src/k8s.io/endpointslice v0.0.0-20250116190004-350c910bca8d
k8s.io/kms => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kms v0.0.0-20250116190004-350c910bca8d
k8s.io/kube-aggregator => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kube-aggregator v0.0.0-20250116190004-350c910bca8d
k8s.io/kube-controller-manager => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kube-controller-manager v0.0.0-20250116190004-350c910bca8d
k8s.io/kube-proxy => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kube-proxy v0.0.0-20250116190004-350c910bca8d
k8s.io/kube-scheduler => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kube-scheduler v0.0.0-20250116190004-350c910bca8d
k8s.io/kubectl => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kubectl v0.0.0-20250116190004-350c910bca8d
k8s.io/kubelet => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kubelet v0.0.0-20250116190004-350c910bca8d
k8s.io/kubernetes => github.com/kcp-dev/kubernetes v0.0.0-20250116190004-350c910bca8d
k8s.io/legacy-cloud-providers => github.com/kcp-dev/kubernetes/staging/src/k8s.io/legacy-cloud-providers v0.0.0-20250116190004-350c910bca8d
k8s.io/metrics => github.com/kcp-dev/kubernetes/staging/src/k8s.io/metrics v0.0.0-20250116190004-350c910bca8d
k8s.io/mount-utils => github.com/kcp-dev/kubernetes/staging/src/k8s.io/mount-utils v0.0.0-20250116190004-350c910bca8d
k8s.io/pod-security-admission => github.com/kcp-dev/kubernetes/staging/src/k8s.io/pod-security-admission v0.0.0-20250116190004-350c910bca8d
k8s.io/sample-apiserver => github.com/kcp-dev/kubernetes/staging/src/k8s.io/sample-apiserver v0.0.0-20250116190004-350c910bca8d
k8s.io/sample-cli-plugin => github.com/kcp-dev/kubernetes/staging/src/k8s.io/sample-cli-plugin v0.0.0-20250116190004-350c910bca8d
k8s.io/sample-controller => github.com/kcp-dev/kubernetes/staging/src/k8s.io/sample-controller v0.0.0-20250116190004-350c910bca8d
k8s.io/api => github.com/kcp-dev/kubernetes/staging/src/k8s.io/api v0.0.0-20250125214723-819c32dd4b3d
k8s.io/apiextensions-apiserver => github.com/kcp-dev/kubernetes/staging/src/k8s.io/apiextensions-apiserver v0.0.0-20250125214723-819c32dd4b3d
k8s.io/apimachinery => github.com/kcp-dev/kubernetes/staging/src/k8s.io/apimachinery v0.0.0-20250125214723-819c32dd4b3d
k8s.io/apiserver => github.com/kcp-dev/kubernetes/staging/src/k8s.io/apiserver v0.0.0-20250125214723-819c32dd4b3d
k8s.io/cli-runtime => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cli-runtime v0.0.0-20250125214723-819c32dd4b3d
k8s.io/client-go => github.com/kcp-dev/kubernetes/staging/src/k8s.io/client-go v0.0.0-20250125214723-819c32dd4b3d
k8s.io/cloud-provider => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cloud-provider v0.0.0-20250125214723-819c32dd4b3d
k8s.io/cluster-bootstrap => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cluster-bootstrap v0.0.0-20250125214723-819c32dd4b3d
k8s.io/code-generator => github.com/kcp-dev/kubernetes/staging/src/k8s.io/code-generator v0.0.0-20250125214723-819c32dd4b3d
k8s.io/component-base => github.com/kcp-dev/kubernetes/staging/src/k8s.io/component-base v0.0.0-20250125214723-819c32dd4b3d
k8s.io/component-helpers => github.com/kcp-dev/kubernetes/staging/src/k8s.io/component-helpers v0.0.0-20250125214723-819c32dd4b3d
k8s.io/controller-manager => github.com/kcp-dev/kubernetes/staging/src/k8s.io/controller-manager v0.0.0-20250125214723-819c32dd4b3d
k8s.io/cri-api => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cri-api v0.0.0-20250125214723-819c32dd4b3d
k8s.io/cri-client => github.com/kcp-dev/kubernetes/staging/src/k8s.io/cri-client v0.0.0-20250125214723-819c32dd4b3d
k8s.io/csi-translation-lib => github.com/kcp-dev/kubernetes/staging/src/k8s.io/csi-translation-lib v0.0.0-20250125214723-819c32dd4b3d
k8s.io/dynamic-resource-allocation => github.com/kcp-dev/kubernetes/staging/src/k8s.io/dynamic-resource-allocation v0.0.0-20250125214723-819c32dd4b3d
k8s.io/endpointslice => github.com/kcp-dev/kubernetes/staging/src/k8s.io/endpointslice v0.0.0-20250125214723-819c32dd4b3d
k8s.io/kms => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kms v0.0.0-20250125214723-819c32dd4b3d
k8s.io/kube-aggregator => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kube-aggregator v0.0.0-20250125214723-819c32dd4b3d
k8s.io/kube-controller-manager => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kube-controller-manager v0.0.0-20250125214723-819c32dd4b3d
k8s.io/kube-proxy => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kube-proxy v0.0.0-20250125214723-819c32dd4b3d
k8s.io/kube-scheduler => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kube-scheduler v0.0.0-20250125214723-819c32dd4b3d
k8s.io/kubectl => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kubectl v0.0.0-20250125214723-819c32dd4b3d
k8s.io/kubelet => github.com/kcp-dev/kubernetes/staging/src/k8s.io/kubelet v0.0.0-20250125214723-819c32dd4b3d
k8s.io/kubernetes => github.com/kcp-dev/kubernetes v0.0.0-20250125214723-819c32dd4b3d
k8s.io/legacy-cloud-providers => github.com/kcp-dev/kubernetes/staging/src/k8s.io/legacy-cloud-providers v0.0.0-20250125214723-819c32dd4b3d
k8s.io/metrics => github.com/kcp-dev/kubernetes/staging/src/k8s.io/metrics v0.0.0-20250125214723-819c32dd4b3d
k8s.io/mount-utils => github.com/kcp-dev/kubernetes/staging/src/k8s.io/mount-utils v0.0.0-20250125214723-819c32dd4b3d
k8s.io/pod-security-admission => github.com/kcp-dev/kubernetes/staging/src/k8s.io/pod-security-admission v0.0.0-20250125214723-819c32dd4b3d
k8s.io/sample-apiserver => github.com/kcp-dev/kubernetes/staging/src/k8s.io/sample-apiserver v0.0.0-20250125214723-819c32dd4b3d
k8s.io/sample-cli-plugin => github.com/kcp-dev/kubernetes/staging/src/k8s.io/sample-cli-plugin v0.0.0-20250125214723-819c32dd4b3d
k8s.io/sample-controller => github.com/kcp-dev/kubernetes/staging/src/k8s.io/sample-controller v0.0.0-20250125214723-819c32dd4b3d
)
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