Verification of CAPI artifacts

Requirements

You will need to have the following tools installed:

CAPI Images

Each release of the Cluster API project includes the following container images:

  • cluster-api-controller
  • kubeadm-bootstrap-controller
  • kubeadm-control-plane-controller
  • clusterctl

Verifying Image Signatures

All of the four images are hosted by registry.k8s.io. In order to verify the authenticity of the images, you can use cosign verify command with the appropriate image name and version: 

$ cosign verify registry.k8s.io/cluster-api/cluster-api-controller:v1.5.0 --certificate-identity krel-trust@k8s-releng-prod.iam.gserviceaccount.com --certificate-oidc-issuer https://accounts.google.com | jq .

Verification for registry.k8s.io/cluster-api/cluster-api-controller:v1.5.0 --
The following checks were performed on each of these signatures:
  - The cosign claims were validated
  - Existence of the claims in the transparency log was verified offline
  - The code-signing certificate was verified using trusted certificate authority certificates
[
  {
    "critical": {
      "identity": {
        "docker-reference": "registry.k8s.io/cluster-api/cluster-api-controller"
      },
      "image": {
        "docker-manifest-digest": "sha256:f34016d3a494f9544a16137c9bba49d8756c574a0a1baf96257903409ef82f77"
      },
      "type": "cosign container image signature"
    },
    "optional": {
      "1.3.6.1.4.1.57264.1.1": "https://accounts.google.com",
      "Bundle": {
        "SignedEntryTimestamp": "MEYCIQDtxr/v3uRl2QByVfYo1oopruADSaH3E4wThpmkibJs8gIhAIe0odbk99na5GBdYGjJ6IwpFzhlTlicgWOrsgxZH8LC",
        "Payload": {
          "body": "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",
          "integratedTime": 1690304684,
          "logIndex": 28719030,
          "logID": "c0d23d6ad406973f9559f3ba2d1ca01f84147d8ffc5b8445c224f98b9591801d"
        }
      },
      "Issuer": "https://accounts.google.com",
      "Subject": "krel-trust@k8s-releng-prod.iam.gserviceaccount.com",
      "org.kubernetes.kpromo.version": "kpromo-v4.0.3-5-ge99897c"
    }
  }
]