cip-requires-two-signatures-and-two-attestations.yaml

# Copyright 2022 The Sigstore Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

apiVersion: cosigned.sigstore.dev/v1alpha1
kind: ClusterImagePolicy
metadata:
  name: image-policy-requires-two-signatures-two-attestations
spec:
  images:
  - glob: registry.local:5000/cosigned/demo*
  authorities:
  - name: keylessatt
    keyless:
      url: http://fulcio.fulcio-system.svc
    ctlog:
      url: http://rekor.rekor-system.svc
    attestations:
    - predicateType: custom
      name: customkeyless
      policy:
        type: cue
        data: |
          import "time"
          before: time.Parse(time.RFC3339, "2049-10-09T17:10:27Z")
          predicateType: "cosign.sigstore.dev/attestation/v1"
          predicate: {
            Data: "foobar e2e test"
            Timestamp: <before
          }
    - predicateType: vuln
      name: vulnkeyless
      policy:
        type: cue
        data: |
          import "time"
          before: time.Parse(time.RFC3339, "2022-04-15T17:10:27Z")
          after: time.Parse(time.RFC3339, "2022-03-09T17:10:27Z")
          predicateType: "cosign.sigstore.dev/attestation/vuln/v1"
          predicate: {
            invocation: {
              uri: "invocation.example.com/cosign-testing"
            }
            scanner: {
              uri: "fakescanner.example.com/cosign-testing"
            }
            metadata: {
              scanStartedOn: <before
              scanStartedOn: >after
              scanFinishedOn: <before
              scanFinishedOn: >after
            }
          }
  - name: keyatt
    key:
      data: |
        -----BEGIN PUBLIC KEY-----
        MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEOz9FcbJM/oOkC26Wfo9paG2tYGBL
        usDLHze93DzgLaAPDsyJrygpVnL9M6SOyfyXEsjpBTUu6uFZqHua8hwAlA==
        -----END PUBLIC KEY-----
    ctlog:
      url: http://rekor.rekor-system.svc
    attestations:
    - name: custom-match-predicate
      predicateType: custom
      policy:
        type: cue
        data: |
          predicateType: "cosign.sigstore.dev/attestation/v1"
          predicate: Data: "foobar key e2e test"
  - name: keylesssignature
    keyless:
      url: http://fulcio.fulcio-system.svc
    ctlog:
      url: http://rekor.rekor-system.svc
  - name: keysignature
    key:
      data: |
        -----BEGIN PUBLIC KEY-----
        MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEOz9FcbJM/oOkC26Wfo9paG2tYGBL
        usDLHze93DzgLaAPDsyJrygpVnL9M6SOyfyXEsjpBTUu6uFZqHua8hwAlA==
        -----END PUBLIC KEY-----
    ctlog:
      url: http://rekor.rekor-system.svc
  policy:
    type: cue
    data: |
      package sigstore
      import "struct"
      import "list"
      authorityMatches: {
        keyatt: {
          attestations: struct.MaxFields(1) & struct.MinFields(1)
        },
        keysignature: {
          signatures: list.MaxItems(1) & list.MinItems(1)
        },
        if (len(authorityMatches.keylessatt.attestations) < 2) {
          keylessattMinAttestations: 2
          keylessattMinAttestations: "Error"
        },
        keylesssignature: {
          signatures: list.MaxItems(1) & list.MinItems(1)
        }
      }