Add CLI flags for OCIRepository signature verification

cmd/flux/create_source_oci.go

@@ -51,16 +51,18 @@ var createSourceOCIRepositoryCmd = &cobra.Command{
 }
 
 type sourceOCIRepositoryFlags struct {
-	url            string
-	tag            string
-	semver         string
-	digest         string
-	secretRef      string
-	serviceAccount string
-	certSecretRef  string
-	ignorePaths    []string
-	provider       flags.SourceOCIProvider
-	insecure       bool
+	url             string
+	tag             string
+	semver          string
+	digest          string
+	secretRef       string
+	serviceAccount  string
+	certSecretRef   string
+	verifyProvider  flags.SourceOCIVerifyProvider
+	verifySecretRef string
+	ignorePaths     []string
+	provider        flags.SourceOCIProvider
+	insecure        bool
 }
 
 var sourceOCIRepositoryArgs = newSourceOCIFlags()
@@ -80,6 +82,8 @@ func init() {
 	createSourceOCIRepositoryCmd.Flags().StringVar(&sourceOCIRepositoryArgs.secretRef, "secret-ref", "", "the name of the Kubernetes image pull secret (type 'kubernetes.io/dockerconfigjson')")
 	createSourceOCIRepositoryCmd.Flags().StringVar(&sourceOCIRepositoryArgs.serviceAccount, "service-account", "", "the name of the Kubernetes service account that refers to an image pull secret")
 	createSourceOCIRepositoryCmd.Flags().StringVar(&sourceOCIRepositoryArgs.certSecretRef, "cert-ref", "", "the name of a secret to use for TLS certificates")
+	createSourceOCIRepositoryCmd.Flags().Var(&sourceOCIRepositoryArgs.verifyProvider, "verify-provider", sourceOCIRepositoryArgs.verifyProvider.Description())
+	createSourceOCIRepositoryCmd.Flags().StringVar(&sourceOCIRepositoryArgs.verifySecretRef, "verify-secret-ref", "", "the name of a secret to use for signature verification")
 	createSourceOCIRepositoryCmd.Flags().StringSliceVar(&sourceOCIRepositoryArgs.ignorePaths, "ignore-paths", nil, "set paths to ignore resources (can specify multiple paths with commas: path1,path2)")
 	createSourceOCIRepositoryCmd.Flags().BoolVar(&sourceOCIRepositoryArgs.insecure, "insecure", false, "for when connecting to a non-TLS registries over plain HTTP")
 
@@ -156,6 +160,19 @@ func createSourceOCIRepositoryCmdRun(cmd *cobra.Command, args []string) error {
 		}
 	}
 
+	if provider := sourceOCIRepositoryArgs.verifyProvider.String(); provider != "" {
+		repository.Spec.Verify = &sourcev1.OCIRepositoryVerification{
+			Provider: provider,
+		}
+		if secretName := sourceOCIRepositoryArgs.verifySecretRef; secretName != "" {
+			repository.Spec.Verify.SecretRef = &meta.LocalObjectReference{
+				Name: secretName,
+			}
+		}
+	} else if sourceOCIRepositoryArgs.verifySecretRef != "" {
+		return fmt.Errorf("a verification provider must be specified when a secret is specified")
+	}
+
 	if createArgs.export {
 		return printExport(exportOCIRepository(repository))
 	}

cmd/flux/create_source_oci_test.go

@@ -36,6 +36,11 @@ func TestCreateSourceOCI(t *testing.T) {
 			args:       "create source oci podinfo",
 			assertFunc: assertError("url is required"),
 		},
+		{
+			name:       "verify provider not specified",
+			args:       "create source oci podinfo --url=oci://ghcr.io/stefanprodan/manifests/podinfo --tag=6.3.5 --verify-secret-ref=cosign-pub",
+			assertFunc: assertError("a verification provider must be specified when a secret is specified"),
+		},
 		{
 			name:       "export manifest",
 			args:       "create source oci podinfo --url=oci://ghcr.io/stefanprodan/manifests/podinfo --tag=6.3.5 --interval 10m --export",
@@ -46,6 +51,11 @@ func TestCreateSourceOCI(t *testing.T) {
 			args:       "create source oci podinfo --url=oci://ghcr.io/stefanprodan/manifests/podinfo --tag=6.3.5 --interval 10m --secret-ref=creds --export",
 			assertFunc: assertGoldenFile("./testdata/oci/export_with_secret.golden"),
 		},
+		{
+			name:       "export manifest with verify secret",
+			args:       "create source oci podinfo --url=oci://ghcr.io/stefanprodan/manifests/podinfo --tag=6.3.5 --interval 10m --verify-provider=cosign --verify-secret-ref=cosign-pub --export",
+			assertFunc: assertGoldenFile("./testdata/oci/export_with_verify_secret.golden"),
+		},
 	}
 
 	for _, tt := range tests {

cmd/flux/testdata/oci/export_with_verify_secret.golden

@@ -0,0 +1,15 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1beta2
+kind: OCIRepository
+metadata:
+  name: podinfo
+  namespace: flux-system
+spec:
+  interval: 10m0s
+  ref:
+    tag: 6.3.5
+  url: oci://ghcr.io/stefanprodan/manifests/podinfo
+  verify:
+    provider: cosign
+    secretRef:
+      name: cosign-pub

internal/flags/source_oci_verify_provider.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2023 The Flux 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
+
+    http://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.
+*/
+
+package flags
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/fluxcd/flux2/v2/internal/utils"
+)
+
+var supportedSourceOCIVerifyProviders = []string{
+	"cosign",
+}
+
+type SourceOCIVerifyProvider string
+
+func (p *SourceOCIVerifyProvider) String() string {
+	return string(*p)
+}
+
+func (p *SourceOCIVerifyProvider) Set(str string) error {
+	if strings.TrimSpace(str) == "" {
+		return fmt.Errorf("no source OCI verify provider given, please specify %s",
+			p.Description())
+	}
+	if !utils.ContainsItemString(supportedSourceOCIVerifyProviders, str) {
+		return fmt.Errorf("source OCI verify provider '%s' is not supported, must be one of: %v",
+			str, strings.Join(supportedSourceOCIVerifyProviders, ", "))
+	}
+	*p = SourceOCIVerifyProvider(str)
+	return nil
+}
+
+func (p *SourceOCIVerifyProvider) Type() string {
+	return "sourceOCIVerifyProvider"
+}
+
+func (p *SourceOCIVerifyProvider) Description() string {
+	return fmt.Sprintf(
+		"the OCI verify provider name to use for signature verification, available options are: (%s)",
+		strings.Join(supportedSourceOCIVerifyProviders, ", "),
+	)
+}

internal/flags/source_oci_verify_provider_test.go

@@ -0,0 +1,48 @@
+//go:build !e2e
+// +build !e2e
+
+/*
+Copyright 2023 The Flux 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
+
+    http://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.
+*/
+
+package flags
+
+import (
+	"testing"
+)
+
+func TestSourceOCIVerifyProvider_Set(t *testing.T) {
+	tests := []struct {
+		name      string
+		str       string
+		expect    string
+		expectErr bool
+	}{
+		{"supported", "cosign", "cosign", false},
+		{"unsupported", "unsupported", "", true},
+		{"empty", "", "", true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var s SourceOCIVerifyProvider
+			if err := s.Set(tt.str); (err != nil) != tt.expectErr {
+				t.Errorf("Set() error = %v, expectErr %v", err, tt.expectErr)
+			}
+			if str := s.String(); str != tt.expect {
+				t.Errorf("Set() = %v, expect %v", str, tt.expect)
+			}
+		})
+	}
+}