Support images as well as indexes in ImageDetailResolvers (#183)

* build: Generate test data for unsigned and no provenance image indexes
* feat: Add function to build index without SBOM or provenance for linux/amd64 platform
* feat: add build_image function to build image without SBOM or provenance for linux/amd64
* feat: Rename NO_SBOM_NO_PROVENANCE_INDEX_DIR to UNSIGNED_IMAGE_DIR
* feat: support images in details resolvers

.github/release-drafter-config.yml

@@ -14,6 +14,9 @@ categories:
   - title: "🧰 Maintenance"
     labels:
       - "chore"
+  - title: "💥 Breaking Changes"
+    labels:
+      - "breaking"
 
 change-template: "- $TITLE @$AUTHOR (#$NUMBER)"
 change-title-escapes: '\<*_&' # You can add # and @ to disable mentions, and add ` to disable code blocks.
@@ -21,6 +24,7 @@ version-resolver:
   major:
     labels:
       - "major"
+      - "breaking"
   minor:
     labels:
       - "minor"
@@ -37,26 +41,19 @@ autolabeler:
   - label: "chore"
     files:
       - "*.md"
-    branch:
-      - '/docs{0,1}\/.+/'
-      - '/tests{0,1}\/.+/'
-      - '/chore{0,1}\/.+/'
     title:
-      - "/docs/i"
-      - "/test/i"
-      - "/chore/i"
+      - "/^docs!?:/i"
+      - "/^test!?:/i"
+      - "/^chore!?:/i"
+      - "/^refactor!?:/i"
   - label: "bug"
-    branch:
-      - '/fix\/.+/'
-      - '/revert\/.+/'
     title:
-      - "/fix/i"
-      - "/revert/i"
+      - "/^fix!?:/i"
+      - "/^revert!?:/i"
   - label: "feature"
-    branch:
-      - '/feature\/.+/'
-      - '/feat\/.+/'
-      - '/add\/.+/'
     title:
-      - "/feat/i"
-      - "/add/i"
+      - "/^feat!?:/i"
+      - "/^add!?:/i"
+  - label: "breaking"
+    title:
+      - "/^[a-zA-Z]+!:/i"

.github/workflows/release.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
       - name: Generate GitHub App Token
         id: app-token
-        uses: actions/create-github-app-token@31c86eb3b33c9b601a1f60f98dcbfd1d70f379b4 # v1.10.3
+        uses: actions/create-github-app-token@5d869da34e18e7287c1daad50e0b8ea0f506ce69 # v1.11.0
         with:
             app-id: ${{ vars.ATTEST_RELEASE_APP_ID }}
             private-key: ${{ secrets.ATTEST_RELEASE_APP_PRIVATE_KEY }}

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
       id-token: write
     strategy:
       matrix:
-        go-version: [1.22.x]
+        go-version: [1.22.x, 1.23.x]
         # temp disable windows tests see https://github.com/docker/image-signer-verifier/pull/154
         # os: [ubuntu-latest, macos-latest, windows-latest]
         os: [ubuntu-latest, macos-latest]

.gitignore

@@ -19,3 +19,4 @@
 
 # Go workspace file
 go.work
+.aider*

README.md

@@ -40,9 +40,6 @@ Examples of attestations include statements about the provenance and SBOM of an
 This library can be used to verify these attestations using Rego policy.
 Policy can be used to check whether an attestation is correctly signed, and that the contents of the attestation are correct.
 
-Our overall goal with this project is adoption of the ideas into other open-source projects, rather than to create another standalone tool.
-It would be a great outcome if this library was no longer needed because the functionality was built into other tools.
-
 # Features
 
 - Sign in-toto attestations
@@ -66,7 +63,7 @@ See [Policy Mapping](#policy-mapping) for more details.
 
 The `attest.Verify` function returns a `VerificationSummary` object, which contains the results of the policy evaluation.
 
-See [example_verify_test.go](./pkg/attest/example_verify_test.go) for an example of how to verify an image against a policy.
+See [example_verify_test.go](./example_verify_test.go) for an example of how to verify an image against a policy.
 
 ## Signing Attestations
 
@@ -76,7 +73,7 @@ This function takes a statement and DSSE signer, and returns a signed DSSE envel
 For the common use case of signing a statement and adding it to a manifest, e.g. for pushing to a registry as a referrer to the image being attested, the `attestation.AttestationManifest` type can be used.
 See [example_attestation_manifest_test.go](./pkg/attestation/example_attestation_manifest_test.go)
 
-See also [example_sign_test.go](./pkg/attest/example_sign_test.go) for an example of how to sign all attached in-toto statements on an image, e.g. those produced by buildkit.
+See also [example_sign_test.go](./example_sign_test.go) for an example of how to sign all attached in-toto statements on an image, e.g. those produced by buildkit.
 
 # Rego Policy
 
@@ -203,8 +200,14 @@ rules:
   - pattern: "^docker[.]io/library/(.*)$"
     policy-id: docker-official-images
   - pattern: "^public[.]ecr[.]aws/docker/library/(.*)$"
+    platforms: ["linux/amd64"] # optional: restrict image platforms for matching policies (default: all)
     rewrite: docker.io/library/$1
 ```
+`platforms` in the second rule above is optional and can be used to restrict the platforms for which the policy
+ is evaluated. If the `platforms` field is not present, the policy will be applied to all platforms.
+ It's important to note that the `platforms` field is a filter, and is applied before the `pattern`
+ field is processed, so both `platforms` and `pattern` need to match in order for the policy to be selected
+ (or the rewrite to be processed if present).
 
 As before, any repository in the `docker.io/library` namespace will be evaluated against the policy in `doi/policy.rego`.
 The second rule will rewrite any repository in the `public.ecr.aws/docker/library` namespace to `docker.io/library`.

attestation/attestation.go

@@ -8,7 +8,7 @@ import (
 	"maps"
 	"strings"
 
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/empty"
 	"github.com/google/go-containerregistry/pkg/v1/layout"
@@ -96,8 +96,9 @@ func layersFromImage(image v1.Image) ([]*Layer, error) {
 		// copy original annotations
 		ann := maps.Clone(layerDesc.Annotations)
 		// only decode intoto statements
-		stmt := new(intoto.Statement)
+		var stmt *intoto.Statement
 		if mt == types.MediaType(intoto.PayloadType) {
+			stmt = new(intoto.Statement)
 			err = json.NewDecoder(r).Decode(&stmt)
 			if err != nil {
 				return nil, fmt.Errorf("failed to decode statement layer contents: %w", err)

attestation/attestation_test.go

@@ -3,8 +3,8 @@ package attestation_test
 import (
 	"testing"
 
+	"github.com/docker/attest/attestation"
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/attestation"
 	intoto "github.com/in-toto/in-toto-golang/in_toto"
 	"github.com/stretchr/testify/assert"
 )
@@ -12,7 +12,7 @@ import (
 const ExpectedStatements = 4
 
 func TestExtractAnnotatedStatements(t *testing.T) {
-	statements, err := attestation.ExtractAnnotatedStatements(test.UnsignedTestImage, intoto.PayloadType)
+	statements, err := attestation.ExtractAnnotatedStatements(test.UnsignedTestIndex(".."), intoto.PayloadType)
 	assert.NoError(t, err)
 	assert.Equalf(t, len(statements), ExpectedStatements, "expected %d statement, got %d", ExpectedStatements, len(statements))
 }

attestation/example_attestation_manifest_test.go

@@ -4,9 +4,9 @@ import (
 	"context"
 	"time"
 
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/signerverifier"
+	"github.com/docker/attest/attestation"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/signerverifier"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	intoto "github.com/in-toto/in-toto-golang/in_toto"
 	"github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/common"
@@ -26,12 +26,12 @@ func ExampleManifest() {
 
 	// configure signing options
 	opts := &attestation.SigningOptions{
-		SkipTL: true, // skip trust logging to a transparency log
+		TransparencyLog: nil, // set this to log to a transparency log
 	}
 
 	ref := "docker/image-signer-verifier:latest"
 
-	digest, err := v1.NewHash("sha256:da8b190665956ea07890a0273e2a9c96bfe291662f08e2860e868eef69c34620")
+	digest, err := v1.NewHash("sha256:7ae6b41655929ad8e1848064874a98ac3f68884996c79907f6525e3045f75390")
 	if err != nil {
 		panic(err)
 	}
@@ -82,7 +82,8 @@ func ExampleManifest() {
 	if err != nil {
 		panic(err)
 	}
-	err = oci.SaveImagesNoTag(artifacts, output)
+	ctx := context.Background()
+	err = oci.SaveImagesNoTag(ctx, artifacts, output)
 	if err != nil {
 		panic(err)
 	}

attestation/layout.go

@@ -5,12 +5,18 @@ import (
 	"encoding/json"
 	"fmt"
 
-	"github.com/docker/attest/pkg/oci"
+	containerd "github.com/containerd/containerd/v2/core/images"
+	"github.com/distribution/reference"
+	"github.com/docker/attest/oci"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/layout"
+	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
 // implementation of Resolver that closes over attestations from an oci layout.
+
+var _ Resolver = (*LayoutResolver)(nil)
+
 type LayoutResolver struct {
 	*Manifest
 	*oci.ImageSpec
@@ -83,30 +89,49 @@ func (r *LayoutResolver) ImagePlatform(_ context.Context) (*v1.Platform, error)
 }
 
 func manifestFromOCILayout(path string, platform *v1.Platform) (*Manifest, error) {
-	idx, err := layout.ImageIndexFromPath(path)
+	layoutIndex, err := layout.ImageIndexFromPath(path)
 	if err != nil {
 		return nil, err
 	}
 
-	idxm, err := idx.IndexManifest()
+	layoutIndexManifest, err := layoutIndex.IndexManifest()
 	if err != nil {
 		return nil, fmt.Errorf("failed to get digest: %w", err)
 	}
 
-	idxDescriptor := idxm.Manifests[0]
-	idxDigest := idxDescriptor.Digest
-
-	mfs, err := idx.ImageIndex(idxDigest)
-	if err != nil {
-		return nil, fmt.Errorf("failed to extract ImageIndex for digest %s: %w", idxDigest.String(), err)
+	layoutDescriptor := layoutIndexManifest.Manifests[0]
+	layoutDescriptorDigest := layoutDescriptor.Digest
+	subjectName := layoutDescriptor.Annotations[ocispec.AnnotationRefName]
+	if _, err := reference.ParseNamed(subjectName); err != nil {
+		// try the containerd annotation if the org.opencontainers.image.ref.name is not a full name
+		subjectName = layoutDescriptor.Annotations[containerd.AnnotationImageName]
+		if _, err := reference.ParseNamed(subjectName); err != nil {
+			return nil, fmt.Errorf("failed to find subject name in annotations")
+		}
 	}
-	mfs2, err := mfs.IndexManifest()
+
+	// check if digest refers to an image or an index
+	_, err = layoutIndex.Image(layoutDescriptorDigest)
+	if err == nil {
+		return &Manifest{
+			OriginalLayers:     nil,
+			OriginalDescriptor: nil,
+			SubjectName:        subjectName,
+			SubjectDescriptor:  &layoutDescriptor,
+		}, nil
+	}
+
+	subjectIndex, err := layoutIndex.ImageIndex(layoutDescriptorDigest)
+	if err != nil {
+		return nil, fmt.Errorf("failed to extract ImageIndex for digest %s: %w", layoutDescriptorDigest.String(), err)
+	}
+	subjectIndexManifest, err := subjectIndex.IndexManifest()
 	if err != nil {
 		return nil, fmt.Errorf("failed to extract IndexManifest from ImageIndex: %w", err)
 	}
 	var subjectDescriptor *v1.Descriptor
-	for i := range mfs2.Manifests {
-		manifest := &mfs2.Manifests[i]
+	for i := range subjectIndexManifest.Manifests {
+		manifest := &subjectIndexManifest.Manifests[i]
 		if manifest.Platform != nil {
 			if manifest.Platform.Equals(*platform) {
 				subjectDescriptor = manifest
@@ -117,8 +142,8 @@ func manifestFromOCILayout(path string, platform *v1.Platform) (*Manifest, error
 	if subjectDescriptor == nil {
 		return nil, fmt.Errorf("platform not found in index")
 	}
-	for i := range mfs2.Manifests {
-		mf := &mfs2.Manifests[i]
+	for i := range subjectIndexManifest.Manifests {
+		mf := &subjectIndexManifest.Manifests[i]
 		if mf.Annotations[DockerReferenceType] != AttestationManifestType {
 			continue
 		}
@@ -127,7 +152,7 @@ func manifestFromOCILayout(path string, platform *v1.Platform) (*Manifest, error
 			continue
 		}
 
-		attestationImage, err := mfs.Image(mf.Digest)
+		attestationImage, err := subjectIndex.Image(mf.Digest)
 		if err != nil {
 			return nil, fmt.Errorf("failed to extract attestation image with digest %s: %w", mf.Digest.String(), err)
 		}
@@ -138,7 +163,7 @@ func manifestFromOCILayout(path string, platform *v1.Platform) (*Manifest, error
 		attest := &Manifest{
 			OriginalLayers:     layers,
 			OriginalDescriptor: mf,
-			SubjectName:        idxDescriptor.Annotations["org.opencontainers.image.ref.name"],
+			SubjectName:        subjectName,
 			SubjectDescriptor:  subjectDescriptor,
 		}
 		return attest, nil

attestation/layout_test.go

@@ -0,0 +1,107 @@
+package attestation_test
+
+import (
+	"context"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/docker/attest"
+	"github.com/docker/attest/attestation"
+	"github.com/docker/attest/internal/test"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/policy"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAttestationFromOCILayout(t *testing.T) {
+	ctx, signer := test.Setup(t)
+	outputLayout := test.CreateTempDir(t, "", "attest-oci-layout")
+
+	invalidPlatform := &v1.Platform{
+		Architecture: "invalid",
+		OS:           "invalid",
+	}
+
+	opts := &attestation.SigningOptions{}
+	attIdx, err := oci.IndexFromPath(test.UnsignedTestIndex(".."))
+	require.NoError(t, err)
+	signedManifests, err := attest.SignStatements(ctx, attIdx.Index, signer, opts)
+	require.NoError(t, err)
+	signedIndex := attIdx.Index
+	signedIndex, err = attestation.UpdateIndexImages(signedIndex, signedManifests)
+	require.NoError(t, err)
+	spec, err := oci.ParseImageSpec(oci.LocalPrefix + outputLayout)
+	require.NoError(t, err)
+	err = oci.SaveIndex(ctx, []*oci.ImageSpec{spec}, signedIndex, "docker.io/library/test-image:test")
+	require.NoError(t, err)
+
+	testCases := []struct {
+		name     string
+		platform *v1.Platform
+		errorStr string
+	}{
+		{name: "nominal", platform: spec.Platform},
+		{name: "invalid platform", platform: invalidPlatform, errorStr: "platform not found in index"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			spec := &oci.ImageSpec{
+				Type:       oci.OCI,
+				Identifier: outputLayout,
+				Platform:   tc.platform,
+			}
+			resolver, err := policy.CreateImageDetailsResolver(spec)
+			if tc.errorStr != "" {
+				require.Error(t, err)
+				assert.Contains(t, err.Error(), tc.errorStr)
+				return
+			}
+			require.NoError(t, err)
+			desc, err := resolver.ImageDescriptor(ctx)
+			require.NoError(t, err)
+			digest := desc.Digest.String()
+			assert.True(t, strings.Contains(digest, "sha256:"))
+		})
+	}
+}
+
+func TestSubjectNameAnnotations(t *testing.T) {
+	testCases := []struct {
+		name          string
+		ociLayoutPath string
+		errorStr      string
+	}{
+		{name: "oci annotation", ociLayoutPath: test.UnsignedTestIndex("..")},
+		{name: "containerd annotation", ociLayoutPath: filepath.Join("..", "test", "testdata", "containerd-subject-layout")},
+		{name: "missing subject name", ociLayoutPath: filepath.Join("..", "test", "testdata", "missing-subject-layout"), errorStr: "failed to find subject name in annotations"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			spec, err := oci.ParseImageSpec(oci.LocalPrefix+tc.ociLayoutPath, oci.WithPlatform("linux/arm64"))
+			require.NoError(t, err)
+			_, err = policy.CreateImageDetailsResolver(spec)
+			if tc.errorStr != "" {
+				require.Error(t, err)
+				assert.Contains(t, err.Error(), tc.errorStr)
+				return
+			}
+			require.NoError(t, err)
+		})
+	}
+}
+
+func TestImageDetailsFromImageLayout(t *testing.T) {
+	spec, err := oci.ParseImageSpec(oci.LocalPrefix+test.UnsignedTestImage(".."), oci.WithPlatform("linux/arm64"))
+	require.NoError(t, err)
+	resolver, err := policy.CreateImageDetailsResolver(spec)
+	require.NoError(t, err)
+	desc, err := resolver.ImageDescriptor(context.Background())
+	require.NoError(t, err)
+	digest := desc.Digest.String()
+	assert.Equal(t, "sha256:7ae6b41655929ad8e1848064874a98ac3f68884996c79907f6525e3045f75390", digest)
+}

attestation/mock.go

@@ -3,12 +3,20 @@ package attestation
 import (
 	"context"
 
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/internal/test"
+	"github.com/docker/attest/oci"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 )
 
+// ensure MockResolver implements Resolver.
+var _ oci.ImageDetailsResolver = MockResolver{}
+
 type MockResolver struct {
-	Envs []*Envelope
+	Envs         []*Envelope
+	Image        string
+	PlatformFn   func() (*v1.Platform, error)
+	DescriptorFn func() (*v1.Descriptor, error)
+	ImangeNameFn func() (string, error)
 }
 
 func (r MockResolver) Attestations(_ context.Context, _ string) ([]*Envelope, error) {
@@ -16,11 +24,20 @@ func (r MockResolver) Attestations(_ context.Context, _ string) ([]*Envelope, er
 }
 
 func (r MockResolver) ImageName(_ context.Context) (string, error) {
+	if r.Image != "" {
+		return r.Image, nil
+	}
+	if r.ImangeNameFn != nil {
+		return r.ImangeNameFn()
+	}
 	return "library/alpine:latest", nil
 }
 
 func (r MockResolver) ImageDescriptor(_ context.Context) (*v1.Descriptor, error) {
-	digest, err := v1.NewHash("sha256:da8b190665956ea07890a0273e2a9c96bfe291662f08e2860e868eef69c34620")
+	if r.DescriptorFn != nil {
+		return r.DescriptorFn()
+	}
+	digest, err := v1.NewHash(test.UnsignedLinuxAMD64ImageDigest)
 	if err != nil {
 		return nil, err
 	}
@@ -32,6 +49,9 @@ func (r MockResolver) ImageDescriptor(_ context.Context) (*v1.Descriptor, error)
 }
 
 func (r MockResolver) ImagePlatform(_ context.Context) (*v1.Platform, error) {
+	if r.PlatformFn != nil {
+		return r.PlatformFn()
+	}
 	return oci.ParsePlatform("linux/amd64")
 }
 

attestation/referrers.go

@@ -5,11 +5,14 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 	"github.com/google/go-containerregistry/pkg/name"
 	"github.com/google/go-containerregistry/pkg/v1/remote"
 )
 
+// ensure ReferrersResolver implements Resolver.
+var _ Resolver = &ReferrersResolver{}
+
 type ReferrersResolver struct {
 	referrersRepo string
 	oci.ImageDetailsResolver

attestation/referrers_test.go

@@ -7,12 +7,12 @@ import (
 	"path/filepath"
 	"testing"
 
+	"github.com/docker/attest"
+	"github.com/docker/attest/attestation"
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/attest"
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/config"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/policy"
+	"github.com/docker/attest/mapping"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/policy"
 	"github.com/google/go-containerregistry/pkg/name"
 	"github.com/google/go-containerregistry/pkg/registry"
 	"github.com/google/go-containerregistry/pkg/v1/remote"
@@ -21,18 +21,17 @@ import (
 )
 
 var (
-	NoProvenanceImage   = filepath.Join("..", "..", "test", "testdata", "no-provenance-image")
-	PassPolicyDir       = filepath.Join("..", "..", "test", "testdata", "local-policy-pass")
-	LocalPolicy         = filepath.Join("..", "..", "test", "testdata", "local-policy")
-	LocalPolicyAttached = filepath.Join("..", "..", "test", "testdata", "local-policy-attached")
-	PassNoTLPolicyDir   = filepath.Join("..", "..", "test", "testdata", "local-policy-no-tl")
-	FailPolicyDir       = filepath.Join("..", "..", "test", "testdata", "local-policy-fail")
+	NoProvenanceImage   = filepath.Join("..", "test", "testdata", "no-provenance-image")
+	PassPolicyDir       = filepath.Join("..", "test", "testdata", "local-policy-pass")
+	LocalPolicy         = filepath.Join("..", "test", "testdata", "local-policy")
+	LocalPolicyAttached = filepath.Join("..", "test", "testdata", "local-policy-attached")
+	PassNoTLPolicyDir   = filepath.Join("..", "test", "testdata", "local-policy-no-tl")
+	FailPolicyDir       = filepath.Join("..", "test", "testdata", "local-policy-fail")
 	TestTempDir         = "attest-sign-test"
 )
 
 func TestAttestationReferenceTypes(t *testing.T) {
 	ctx, signer := test.Setup(t)
-	ctx = policy.WithPolicyEvaluator(ctx, policy.NewRegoEvaluator(true))
 	platforms := []string{"linux/amd64", "linux/arm64"}
 	for _, tc := range []struct {
 		name              string
@@ -40,42 +39,43 @@ func TestAttestationReferenceTypes(t *testing.T) {
 		referrersServer   *httptest.Server
 		useDigest         bool
 		referrersRepo     string
-		attestationSource config.AttestationStyle
+		attestationSource mapping.AttestationStyle
 		expectFailure     bool
 	}{
 		{
 			name:   "referrers support, defaults",
-			server: httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
+			server: test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
 		},
 		{
 			name:      "use digest",
-			server:    httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
+			server:    test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
 			useDigest: true,
 		},
 		{
 			name:              "attached attestations, referrers repo (mismatched args)",
-			server:            httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
+			server:            test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
 			expectFailure:     true, // mismatched args
-			attestationSource: config.AttestationStyleAttached,
+			attestationSource: mapping.AttestationStyleAttached,
 			referrersRepo:     "referrers",
 		},
 		{
 			name:              "referrers attestations, referrers repo (no policy)",
-			server:            httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
+			server:            test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
 			expectFailure:     true, // no policy
-			attestationSource: config.AttestationStyleReferrers,
+			attestationSource: mapping.AttestationStyleReferrers,
 			referrersRepo:     "referrers",
 		},
 		{
 			name:              "referrers attestations",
-			server:            httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
-			attestationSource: config.AttestationStyleReferrers,
+			server:            test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
+			attestationSource: mapping.AttestationStyleReferrers,
 		},
 		{
-			name:              "referrers attestations, no referrers support on server",
-			server:            httptest.NewServer(registry.New(registry.WithReferrersSupport(false))),
-			attestationSource: config.AttestationStyleReferrers,
-			referrersServer:   httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
+			name:   "referrers attestations, no referrers support on server",
+			server: test.NewLocalRegistry(ctx, registry.WithReferrersSupport(false)),
+
+			attestationSource: mapping.AttestationStyleReferrers,
+			referrersServer:   test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
 		},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
@@ -88,10 +88,8 @@ func TestAttestationReferenceTypes(t *testing.T) {
 			u, err := url.Parse(s.URL)
 			require.NoError(t, err)
 
-			opts := &attestation.SigningOptions{
-				SkipTL: true,
-			}
-			attIdx, err := oci.IndexFromPath(test.UnsignedTestImage)
+			opts := &attestation.SigningOptions{}
+			attIdx, err := oci.IndexFromPath(test.UnsignedTestIndex(".."))
 			require.NoError(t, err)
 
 			indexName := fmt.Sprintf("%s/repo:root", u.Host)
@@ -110,7 +108,7 @@ func TestAttestationReferenceTypes(t *testing.T) {
 
 			// push subject image so that it can be resolved
 			require.NoError(t, err)
-			err = oci.PushIndexToRegistry(attIdx.Index, indexName)
+			err = oci.PushIndexToRegistry(ctx, attIdx.Index, indexName)
 			require.NoError(t, err)
 
 			// upload referrers
@@ -119,7 +117,7 @@ func TestAttestationReferenceTypes(t *testing.T) {
 			for _, attIdx := range signedManifests {
 				images, err := attIdx.BuildReferringArtifacts()
 				require.NoError(t, err)
-				err = oci.SaveImagesNoTag(images, []*oci.ImageSpec{output})
+				err = oci.SaveImagesNoTag(ctx, images, []*oci.ImageSpec{output})
 				require.NoError(t, err)
 			}
 
@@ -191,13 +189,13 @@ func TestReferencesInDifferentRepo(t *testing.T) {
 	}{
 		{
 			name:      "referrers support",
-			server:    httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
-			refServer: httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
+			server:    test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
+			refServer: test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
 		},
 		{
 			name:      "no referrers support",
-			server:    httptest.NewServer(registry.New()),
-			refServer: httptest.NewServer(registry.New(registry.WithReferrersSupport(true))),
+			server:    test.NewLocalRegistry(ctx, registry.WithReferrersSupport(false)),
+			refServer: test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true)),
 		},
 	} {
 		server := tc.server
@@ -210,14 +208,12 @@ func TestReferencesInDifferentRepo(t *testing.T) {
 		refServerURL, err := url.Parse(refServer.URL)
 		require.NoError(t, err)
 
-		opts := &attestation.SigningOptions{
-			SkipTL: true,
-		}
-		attIdx, err := oci.IndexFromPath(test.UnsignedTestImage)
+		opts := &attestation.SigningOptions{}
+		attIdx, err := oci.IndexFromPath(test.UnsignedTestIndex(".."))
 		require.NoError(t, err)
 
 		indexName := fmt.Sprintf("%s/%s:latest", serverURL.Host, repoName)
-		err = oci.PushIndexToRegistry(attIdx.Index, indexName)
+		err = oci.PushIndexToRegistry(ctx, attIdx.Index, indexName)
 		require.NoError(t, err)
 
 		signedManifests, err := attest.SignStatements(ctx, attIdx.Index, signer, opts)
@@ -228,7 +224,7 @@ func TestReferencesInDifferentRepo(t *testing.T) {
 			// push references using subject-digest.att convention
 			image, err := signedManifest.BuildImage()
 			require.NoError(t, err)
-			err = oci.PushImageToRegistry(image, fmt.Sprintf("%s/%s:tag-does-not-matter", refServerURL.Host, repoName))
+			err = oci.PushImageToRegistry(ctx, image, fmt.Sprintf("%s/%s:tag-does-not-matter", refServerURL.Host, repoName))
 			require.NoError(t, err)
 
 			refServer := tc.refServer
@@ -236,14 +232,12 @@ func TestReferencesInDifferentRepo(t *testing.T) {
 			refServerURL, err := url.Parse(refServer.URL)
 			require.NoError(t, err)
 
-			opts := &attestation.SigningOptions{
-				SkipTL: true,
-			}
-			attIdx, err := oci.IndexFromPath(test.UnsignedTestImage)
+			opts := &attestation.SigningOptions{}
+			attIdx, err := oci.IndexFromPath(test.UnsignedTestIndex(".."))
 			require.NoError(t, err)
 
 			indexName := fmt.Sprintf("%s/%s:latest", serverURL.Host, repoName)
-			err = oci.PushIndexToRegistry(attIdx.Index, indexName)
+			err = oci.PushIndexToRegistry(ctx, attIdx.Index, indexName)
 			require.NoError(t, err)
 
 			signedManifests, err := attest.SignStatements(ctx, attIdx.Index, signer, opts)
@@ -255,7 +249,7 @@ func TestReferencesInDifferentRepo(t *testing.T) {
 				imgs, err := mf.BuildReferringArtifacts()
 				require.NoError(t, err)
 				for _, img := range imgs {
-					err = oci.PushImageToRegistry(img, fmt.Sprintf("%s/%s:tag-does-not-matter", refServerURL.Host, repoName))
+					err = oci.PushImageToRegistry(ctx, img, fmt.Sprintf("%s/%s:tag-does-not-matter", refServerURL.Host, repoName))
 					require.NoError(t, err)
 				}
 			}
@@ -284,22 +278,19 @@ func TestReferencesInDifferentRepo(t *testing.T) {
 
 func TestCorrectArtifactTypeInTagFallback(t *testing.T) {
 	ctx, signer := test.Setup(t)
-	server := httptest.NewServer(registry.New())
-
-	defer server.Close()
-	serverURL, err := url.Parse(server.URL)
+	regServer := test.NewLocalRegistry(ctx, registry.WithReferrersSupport(false))
+	defer regServer.Close()
+	serverURL, err := url.Parse(regServer.URL)
 	require.NoError(t, err)
 
 	repoName := "repo"
 
-	opts := &attestation.SigningOptions{
-		SkipTL: true,
-	}
-	attIdx, err := oci.IndexFromPath(test.UnsignedTestImage)
+	opts := &attestation.SigningOptions{}
+	attIdx, err := oci.IndexFromPath(test.UnsignedTestIndex(".."))
 	require.NoError(t, err)
 
 	indexName := fmt.Sprintf("%s/%s:latest", serverURL.Host, repoName)
-	err = oci.PushIndexToRegistry(attIdx.Index, indexName)
+	err = oci.PushIndexToRegistry(ctx, attIdx.Index, indexName)
 	require.NoError(t, err)
 
 	signedManifests, err := attest.SignStatements(ctx, attIdx.Index, signer, opts)
@@ -310,14 +301,14 @@ func TestCorrectArtifactTypeInTagFallback(t *testing.T) {
 		imgs, err := mf.BuildReferringArtifacts()
 		require.NoError(t, err)
 		for _, img := range imgs {
-			err = oci.PushImageToRegistry(img, fmt.Sprintf("%s/%s:tag-does-not-matter", serverURL.Host, repoName))
+			err = oci.PushImageToRegistry(ctx, img, fmt.Sprintf("%s/%s:tag-does-not-matter", serverURL.Host, repoName))
 			require.NoError(t, err)
 			mf, err := img.Manifest()
 			require.NoError(t, err)
 			subject := mf.Subject
 			subjectRef, err := name.ParseReference(fmt.Sprintf("%s/%s:sha256-%s", serverURL.Host, repoName, subject.Digest.Hex))
 			require.NoError(t, err)
-			idx, err := remote.Index(subjectRef)
+			idx, err := remote.Index(subjectRef, oci.WithOptions(ctx, nil)...)
 			require.NoError(t, err)
 			imf, err := idx.IndexManifest()
 			require.NoError(t, err)

attestation/registry.go

@@ -4,12 +4,15 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 	"github.com/google/go-containerregistry/pkg/name"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/remote"
 )
 
+// ensure RegistryResolver implements Resolver.
+var _ Resolver = &RegistryResolver{}
+
 type RegistryResolver struct {
 	*oci.RegistryImageDetailsResolver
 	*Manifest

attestation/registry_test.go

@@ -2,16 +2,15 @@ package attestation_test
 
 import (
 	"fmt"
-	"net/http/httptest"
 	"net/url"
 	"strings"
 	"testing"
 
+	"github.com/docker/attest"
+	"github.com/docker/attest/attestation"
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/attest"
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/policy"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/policy"
 	"github.com/google/go-containerregistry/pkg/registry"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -19,13 +18,13 @@ import (
 
 func TestRegistry(t *testing.T) {
 	ctx, signer := test.Setup(t)
-	server := httptest.NewServer(registry.New(registry.WithReferrersSupport(false)))
-	defer server.Close()
-	u, err := url.Parse(server.URL)
+	regServer := test.NewLocalRegistry(ctx, registry.WithReferrersSupport(false))
+	defer regServer.Close()
+	u, err := url.Parse(regServer.URL)
 	require.NoError(t, err)
 
 	opts := &attestation.SigningOptions{}
-	attIdx, err := oci.IndexFromPath(test.UnsignedTestImage)
+	attIdx, err := oci.IndexFromPath(test.UnsignedTestIndex(".."))
 	require.NoError(t, err)
 	signedManifests, err := attest.SignStatements(ctx, attIdx.Index, signer, opts)
 	require.NoError(t, err)
@@ -35,7 +34,7 @@ func TestRegistry(t *testing.T) {
 
 	indexName := fmt.Sprintf("%s/repo:root", u.Host)
 	require.NoError(t, err)
-	err = oci.PushIndexToRegistry(signedIndex, indexName)
+	err = oci.PushIndexToRegistry(ctx, signedIndex, indexName)
 	require.NoError(t, err)
 
 	spec, err := oci.ParseImageSpec(indexName)
@@ -47,4 +46,14 @@ func TestRegistry(t *testing.T) {
 	require.NoError(t, err)
 	digest := desc.Digest.String()
 	assert.True(t, strings.Contains(digest, "sha256:"))
+
+	// resolver also works with platform specific digest
+	spec, err = oci.ParseImageSpec(fmt.Sprintf("%s@%s", indexName, digest))
+	require.NoError(t, err)
+
+	resolver, err = policy.CreateImageDetailsResolver(spec)
+	require.NoError(t, err)
+	desc, err = resolver.ImageDescriptor(ctx)
+	require.NoError(t, err)
+	assert.Equal(t, desc.Digest.String(), digest)
 }

attestation/resolver.go

@@ -3,7 +3,7 @@ package attestation
 import (
 	"context"
 
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 )
 
 type Resolver interface {

attestation/sign.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 
 	"github.com/docker/attest/internal/util"
-	"github.com/docker/attest/pkg/tlog"
+	"github.com/docker/attest/tlog"
 	intoto "github.com/in-toto/in-toto-golang/in_toto"
 	"github.com/secure-systems-lab/go-securesystemslib/dsse"
 )
@@ -37,10 +37,10 @@ func SignDSSE(ctx context.Context, payload []byte, signer dsse.SignerVerifier, o
 		KeyID: keyID,
 		Sig:   base64Encoding.EncodeToString(sig),
 	}
-	if !opts.SkipTL {
-		ext, err := logSignature(ctx, tlog.GetTL(ctx), &sig, &encPayload, signer)
+	if opts.TransparencyLog != nil {
+		ext, err := logSignature(ctx, opts.TransparencyLog, sig, encPayload, signer)
 		if err != nil {
-			return nil, fmt.Errorf("failed to log to rekor: %w", err)
+			return nil, fmt.Errorf("failed to log signature: %w", err)
 		}
 		dsseSig.Extension = ext
 	}
@@ -51,27 +51,21 @@ func SignDSSE(ctx context.Context, payload []byte, signer dsse.SignerVerifier, o
 }
 
 // returns a new envelope with the transparency log entry added to the signature extension.
-func logSignature(ctx context.Context, t tlog.TL, sig *[]byte, encPayload *[]byte, signer dsse.SignerVerifier) (*Extension, error) {
+func logSignature(ctx context.Context, t tlog.TransparencyLog, sig []byte, encPayload []byte, signer dsse.SignerVerifier) (*Extension, error) {
 	// get Key ID from signer
 	keyID, err := signer.KeyID()
 	if err != nil {
 		return nil, fmt.Errorf("error getting public key ID: %w", err)
 	}
-	entry, err := t.UploadLogEntry(ctx, keyID, *encPayload, *sig, signer)
+	entry, err := t.UploadEntry(ctx, keyID, encPayload, sig, signer)
 	if err != nil {
 		return nil, fmt.Errorf("error uploading TL entry: %w", err)
 	}
-	entryObj, err := t.UnmarshalEntry(entry)
-	if err != nil {
-		return nil, fmt.Errorf("error unmarshaling tl entry: %w", err)
-	}
+
 	return &Extension{
 		Kind: DockerDSSEExtKind,
 		Ext: &DockerDSSEExtension{
-			TL: &DockerTLExtension{
-				Kind: RekorTLExtKind,
-				Data: entryObj, // transparency log entry metadata
-			},
+			TL: entry,
 		},
 	}, nil
 }

attestation/sign_test.go

@@ -1,20 +1,21 @@
 package attestation_test
 
 import (
+	"context"
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/rand"
 	"encoding/json"
 	"fmt"
-	"net/http/httptest"
 	"net/url"
 	"testing"
 	"time"
 
+	"github.com/docker/attest/attestation"
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/signerverifier"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/signerverifier"
+	"github.com/docker/attest/tlog"
 	"github.com/google/go-containerregistry/pkg/registry"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/static"
@@ -36,7 +37,10 @@ func TestSignVerifyAttestation(t *testing.T) {
 
 	payload, err := json.Marshal(stmt)
 	require.NoError(t, err)
-	opts := &attestation.SigningOptions{}
+	tl := tlog.GetMockTL()
+	opts := &attestation.SigningOptions{
+		TransparencyLog: tl,
+	}
 	env, err := attestation.SignDSSE(ctx, payload, signer, opts)
 	require.NoError(t, err)
 
@@ -147,8 +151,17 @@ func TestSignVerifyAttestation(t *testing.T) {
 			opts := &attestation.VerifyOptions{
 				Keys: attestation.Keys{keyMeta},
 			}
-			_, err = attestation.VerifyDSSE(ctx, deserializedEnv, opts)
+			getTL := func(_ context.Context, opts *attestation.VerifyOptions) (tlog.TransparencyLog, error) {
+				if opts.SkipTL {
+					return nil, nil
+				}
+				return tl, nil
+			}
+			verifier, err := attestation.NewVerfier(attestation.WithLogVerifierFactory(getTL))
+			require.NoError(t, err)
+			_, err = attestation.VerifyDSSE(ctx, verifier, deserializedEnv, opts)
 			if tc.expectedError != "" {
+				require.Error(t, err)
 				assert.Contains(t, err.Error(), tc.expectedError)
 			} else {
 				assert.NoError(t, err)
@@ -223,7 +236,6 @@ func TestSimpleStatementSigning(t *testing.T) {
 		{"replaced", true},
 		{"not replaced", false},
 	}
-
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {
 			opts := &attestation.SigningOptions{}
@@ -237,7 +249,7 @@ func TestSimpleStatementSigning(t *testing.T) {
 					PredicateType: attestation.VSAPredicateType,
 				},
 			}
-			digest, err := v1.NewHash("sha256:da8b190665956ea07890a0273e2a9c96bfe291662f08e2860e868eef69c34620")
+			digest, err := v1.NewHash(test.UnsignedLinuxAMD64ImageDigest)
 			require.NoError(t, err)
 			subject := &v1.Descriptor{
 				MediaType: "application/vnd.oci.image.manifest.v1+json",
@@ -283,10 +295,10 @@ func TestSimpleStatementSigning(t *testing.T) {
 				require.NoError(t, err)
 				assert.Len(t, layers, 1)
 			}
-			server := httptest.NewServer(registry.New(registry.WithReferrersSupport(true)))
-			defer server.Close()
+			regServer := test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true))
+			defer regServer.Close()
 
-			u, err := url.Parse(server.URL)
+			u, err := url.Parse(regServer.URL)
 			require.NoError(t, err)
 
 			indexName := fmt.Sprintf("%s/repo:root", u.Host)
@@ -294,7 +306,7 @@ func TestSimpleStatementSigning(t *testing.T) {
 			require.NoError(t, err)
 			artifacts, err := manifest.BuildReferringArtifacts()
 			require.NoError(t, err)
-			err = oci.SaveImagesNoTag(artifacts, output)
+			err = oci.SaveImagesNoTag(ctx, artifacts, output)
 			require.NoError(t, err)
 		})
 	}

attestation/types.go

@@ -1,12 +1,16 @@
 package attestation
 
 import (
+	"crypto"
 	"encoding/base64"
 	"fmt"
+	"time"
 
+	"github.com/docker/attest/tlog"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	intoto "github.com/in-toto/in-toto-golang/in_toto"
 	v02 "github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/v0.2"
+	slsav1 "github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/v1"
 	ociv1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -16,7 +20,6 @@ const (
 	InTotoPredicateType           = "in-toto.io/predicate-type"
 	DockerReferenceDigest         = "vnd.docker.reference.digest"
 	DockerDSSEExtKind             = "application/vnd.docker.attestation-verification.v1+json"
-	RekorTLExtKind                = "Rekor"
 	OCIDescriptorDSSEMediaType    = ociv1.MediaTypeDescriptor + "+dsse"
 	InTotoReferenceLifecycleStage = "vnd.docker.lifecycle-stage"
 	LifecycleStageExperimental    = "experimental"
@@ -71,22 +74,40 @@ type AnnotatedStatement struct {
 }
 
 type DockerDSSEExtension struct {
-	TL *DockerTLExtension `json:"tl"`
+	TL *tlog.DockerTLExtension `json:"tl"`
 }
 
-type DockerTLExtension struct {
-	Kind string `json:"kind"`
-	Data any    `json:"data"`
-}
+type TransparencyLogKind string
+
+const (
+	RekorTransparencyLogKind = "rekor"
+)
 
 type VerifyOptions struct {
-	Keys   []*KeyMetadata `json:"keys"`
-	SkipTL bool           `json:"skip_tl"`
+	Keys            []*KeyMetadata      `json:"keys"`
+	SkipTL          bool                `json:"skip_tl"`
+	TransparencyLog TransparencyLogKind `json:"tl"`
 }
 
+type KeyMetadata struct {
+	ID            string     `json:"id"`
+	PEM           string     `json:"key"`
+	From          time.Time  `json:"from"`
+	To            *time.Time `json:"to"`
+	Status        string     `json:"status"`
+	SigningFormat string     `json:"signing-format"`
+	Distrust      bool       `json:"distrust,omitempty"`
+	publicKey     crypto.PublicKey
+}
+
+type (
+	Keys    []*KeyMetadata
+	KeysMap map[string]*KeyMetadata
+)
+
 type SigningOptions struct {
-	// don't log to the configured transparency log
-	SkipTL bool
+	// set this in order to log to a transparency log
+	TransparencyLog tlog.TransparencyLog
 }
 
 type Options struct {
@@ -98,6 +119,8 @@ type Options struct {
 func DSSEMediaType(predicateType string) (string, error) {
 	var predicateName string
 	switch predicateType {
+	case slsav1.PredicateSLSAProvenance:
+		predicateName = "provenance"
 	case v02.PredicateSLSAProvenance:
 		predicateName = "provenance"
 	case intoto.PredicateSPDX:

attestation/types_test.go

@@ -0,0 +1,44 @@
+package attestation
+
+import (
+	"fmt"
+	"testing"
+
+	intoto "github.com/in-toto/in-toto-golang/in_toto"
+	v02 "github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/v0.2"
+	slsav1 "github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDSSEMediaType(t *testing.T) {
+	testcases := []struct {
+		name     string
+		expected string
+	}{
+		{
+			name:     slsav1.PredicateSLSAProvenance,
+			expected: "provenance",
+		},
+		{
+			name:     v02.PredicateSLSAProvenance,
+			expected: "provenance",
+		},
+		{
+			name:     intoto.PredicateSPDX,
+			expected: "spdx",
+		},
+		{
+			name:     VSAPredicateType,
+			expected: "verification_summary",
+		},
+	}
+
+	for _, tc := range testcases {
+		t.Run(tc.name, func(t *testing.T) {
+			mt, err := DSSEMediaType(tc.name)
+			require.NoError(t, err)
+			assert.Equal(t, fmt.Sprintf("application/vnd.in-toto.%s+dsse", tc.expected), mt)
+		})
+	}
+}

attestation/verifier.go

@@ -0,0 +1,143 @@
+package attestation
+
+import (
+	"context"
+	"crypto"
+	"crypto/x509"
+	"fmt"
+
+	"github.com/docker/attest/signerverifier"
+	"github.com/docker/attest/tlog"
+	"github.com/docker/attest/tuf"
+	"github.com/secure-systems-lab/go-securesystemslib/dsse"
+)
+
+func WithTUFDownloader(tufDownloader tuf.Downloader) func(*verifier) {
+	return func(r *verifier) {
+		r.tufDownloader = tufDownloader
+	}
+}
+
+type SignatureVerifierFactory func(ctx context.Context, publicKey crypto.PublicKey, opts *VerifyOptions) (dsse.Verifier, error)
+
+func WithSignatureVerifierFactory(factory SignatureVerifierFactory) func(*verifier) {
+	return func(r *verifier) {
+		r.signatureVerifierFactory = factory
+	}
+}
+
+func WithLogVerifierFactory(factory LogVerifierFactory) func(*verifier) {
+	return func(r *verifier) {
+		r.logVerifierFactory = factory
+	}
+}
+
+type LogVerifierFactory func(ctx context.Context, opts *VerifyOptions) (tlog.TransparencyLog, error)
+
+func NewVerfier(options ...func(*verifier)) (Verifier, error) {
+	verifier := &verifier{}
+	for _, opt := range options {
+		opt(verifier)
+	}
+	return verifier, nil
+}
+
+type Verifier interface {
+	GetSignatureVerifier(ctx context.Context, publicKey crypto.PublicKey, opts *VerifyOptions) (dsse.Verifier, error)
+	GetLogVerifier(ctx context.Context, opts *VerifyOptions) (tlog.TransparencyLog, error)
+	VerifySignature(ctx context.Context, publicKey crypto.PublicKey, data []byte, signature []byte, opts *VerifyOptions) error
+	VerifyLog(ctx context.Context, keyMeta *KeyMetadata, data []byte, sig *Signature, opts *VerifyOptions) error
+}
+
+// ensure it has all the necessary methods.
+var _ Verifier = (*verifier)(nil)
+
+type verifier struct {
+	tufDownloader            tuf.Downloader
+	signatureVerifierFactory SignatureVerifierFactory
+	logVerifierFactory       LogVerifierFactory
+}
+
+// GetLogVerifier implements Verifier.
+func (v *verifier) GetLogVerifier(ctx context.Context, opts *VerifyOptions) (tlog.TransparencyLog, error) {
+	if v.logVerifierFactory != nil {
+		return v.logVerifierFactory(ctx, opts)
+	}
+	if opts.SkipTL {
+		return nil, nil
+	}
+	// TODO support other transparency logs
+	var transparencyLog tlog.TransparencyLog
+	switch opts.TransparencyLog {
+	case "", RekorTransparencyLogKind:
+		var err error
+		transparencyLog, err = tlog.NewRekorLog(tlog.WithTUFDownloader(v.tufDownloader))
+		if err != nil {
+			return nil, fmt.Errorf("error failed to create rekor verifier: %w", err)
+		}
+	default:
+		return nil, fmt.Errorf("unsupported transparency log: %s", opts.TransparencyLog)
+	}
+	return transparencyLog, nil
+}
+
+// GetSignatureVerifier implements Verifier.
+func (v *verifier) GetSignatureVerifier(ctx context.Context, publicKey crypto.PublicKey, opts *VerifyOptions) (dsse.Verifier, error) {
+	if v.signatureVerifierFactory != nil {
+		return v.signatureVerifierFactory(ctx, publicKey, opts)
+	}
+	// TODO: use details from opts to decide which algorithm to use here
+	ecdsaVerifier, err := signerverifier.NewECDSAVerifier(publicKey)
+	if err != nil {
+		return nil, fmt.Errorf("error failed to create ecdsa verifier: %w", err)
+	}
+	return ecdsaVerifier, nil
+}
+
+func (v *verifier) VerifySignature(ctx context.Context, publicKey crypto.PublicKey, data []byte, signature []byte, opts *VerifyOptions) error {
+	sigVerifier, err := v.GetSignatureVerifier(ctx, publicKey, opts)
+	if err != nil {
+		return fmt.Errorf("error failed to get verifier: %w", err)
+	}
+	return sigVerifier.Verify(ctx, data, signature)
+}
+
+func (v *verifier) VerifyLog(ctx context.Context, keyMeta *KeyMetadata, encPayload []byte, sig *Signature, opts *VerifyOptions) error {
+	if opts.SkipTL {
+		return nil
+	}
+	if sig.Extension == nil || sig.Extension.Kind == "" {
+		return fmt.Errorf("error missing signature extension")
+	}
+	if sig.Extension.Kind != DockerDSSEExtKind {
+		return fmt.Errorf("error unsupported signature extension kind: %s", sig.Extension.Kind)
+	}
+	transparencyLog, err := v.GetLogVerifier(ctx, opts)
+	if err != nil {
+		return fmt.Errorf("error failed to get transparency log verifier: %w", err)
+	}
+	if transparencyLog == nil {
+		return fmt.Errorf("error missing transparency log verifier")
+	}
+
+	// verify TL entry payload
+	publicKey, err := keyMeta.ParsedKey()
+	if err != nil {
+		return fmt.Errorf("error failed to parse public key: %w", err)
+	}
+	encodedPub, err := x509.MarshalPKIXPublicKey(publicKey)
+	if err != nil {
+		return fmt.Errorf("error failed to marshal public key: %w", err)
+	}
+	integratedTime, err := transparencyLog.VerifyEntry(ctx, sig.Extension.Ext.TL, encPayload, encodedPub)
+	if err != nil {
+		return fmt.Errorf("TL entry failed verification: %w", err)
+	}
+	if integratedTime.Before(keyMeta.From) {
+		return fmt.Errorf("key %s was not yet valid at TL log time %s (key valid from %s)", keyMeta.ID, integratedTime, keyMeta.From)
+	}
+	if keyMeta.To != nil && !integratedTime.Before(*keyMeta.To) {
+		return fmt.Errorf("key %s was already %s at TL log time %s (key %s at %s)", keyMeta.ID, keyMeta.Status, integratedTime, keyMeta.Status, *keyMeta.To)
+	}
+	return nil
+}

attestation/verifier_test.go

@@ -0,0 +1,55 @@
+package attestation
+
+import (
+	"context"
+	"reflect"
+	"testing"
+
+	"github.com/docker/attest/tlog"
+	"github.com/docker/attest/tuf"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_verifier_GetLogVerifier(t *testing.T) {
+	type fields struct {
+		tufDownloader            tuf.Downloader
+		signatureVerifierFactory SignatureVerifierFactory
+		logVerifierFactory       LogVerifierFactory
+	}
+	type args struct {
+		ctx  context.Context
+		opts *VerifyOptions
+	}
+	rekor, err := tlog.NewRekorLog()
+	require.NoError(t, err)
+	tests := []struct {
+		name    string
+		fields  fields
+		args    args
+		want    tlog.TransparencyLog
+		wantErr bool
+	}{
+		{name: "skip_tl true", fields: fields{}, args: args{ctx: context.Background(), opts: &VerifyOptions{SkipTL: true}}},
+		{name: "skip_tl false", fields: fields{}, args: args{ctx: context.Background(), opts: &VerifyOptions{SkipTL: false}}, want: rekor},
+		{name: "tl: rekor", fields: fields{logVerifierFactory: func(_ context.Context, _ *VerifyOptions) (tlog.TransparencyLog, error) {
+			return &tlog.Rekor{}, nil
+		}}, args: args{ctx: context.Background(), opts: &VerifyOptions{}}, want: &tlog.Rekor{}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			v := &verifier{
+				tufDownloader:            tt.fields.tufDownloader,
+				signatureVerifierFactory: tt.fields.signatureVerifierFactory,
+				logVerifierFactory:       tt.fields.logVerifierFactory,
+			}
+			got, err := v.GetLogVerifier(tt.args.ctx, tt.args.opts)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("verifier.GetLogVerifier() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("verifier.GetLogVerifier() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

attestation/verify.go

@@ -0,0 +1,83 @@
+package attestation
+
+import (
+	"context"
+	"crypto"
+	"encoding/base64"
+	"fmt"
+
+	"github.com/docker/attest/signerverifier"
+	intoto "github.com/in-toto/in-toto-golang/in_toto"
+	ociv1 "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/secure-systems-lab/go-securesystemslib/dsse"
+)
+
+func VerifyDSSE(ctx context.Context, verifier Verifier, env *Envelope, opts *VerifyOptions) ([]byte, error) {
+	// enforce payload type
+	if !ValidPayloadType(env.PayloadType) {
+		return nil, fmt.Errorf("unsupported payload type %s", env.PayloadType)
+	}
+
+	if len(env.Signatures) == 0 {
+		return nil, fmt.Errorf("no signatures found")
+	}
+
+	keys := make(map[string]*KeyMetadata, len(opts.Keys))
+	for _, key := range opts.Keys {
+		keys[key.ID] = key
+	}
+
+	payload, err := base64Encoding.DecodeString(env.Payload)
+	if err != nil {
+		return nil, fmt.Errorf("error failed to decode payload: %w", err)
+	}
+
+	encPayload := dsse.PAE(env.PayloadType, payload)
+	// verify signatures and transparency log entry
+	for _, sig := range env.Signatures {
+		// resolve public key used to sign
+		keyMeta, ok := keys[sig.KeyID]
+		if !ok {
+			return nil, fmt.Errorf("error key not found: %s", sig.KeyID)
+		}
+
+		if keyMeta.Distrust {
+			return nil, fmt.Errorf("key %s is distrusted", keyMeta.ID)
+		}
+		publicKey, err := keyMeta.ParsedKey()
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse public key: %w", err)
+		}
+		// decode signature
+		signature, err := base64.StdEncoding.Strict().DecodeString(sig.Sig)
+		if err != nil {
+			return nil, fmt.Errorf("error failed to decode signature: %w", err)
+		}
+
+		err = verifier.VerifySignature(ctx, publicKey, encPayload, signature, opts)
+		if err != nil {
+			return nil, fmt.Errorf("error failed to verify signature: %w", err)
+		}
+		if err := verifier.VerifyLog(ctx, keyMeta, encPayload, sig, opts); err != nil {
+			return nil, fmt.Errorf("error failed to verify transparency log entry: %w", err)
+		}
+	}
+
+	return payload, nil
+}
+
+func ValidPayloadType(payloadType string) bool {
+	return payloadType == intoto.PayloadType || payloadType == ociv1.MediaTypeDescriptor
+}
+
+func (km *KeyMetadata) ParsedKey() (crypto.PublicKey, error) {
+	if km.publicKey != nil {
+		return km.publicKey, nil
+	}
+	publicKey, err := signerverifier.ParsePublicKey([]byte(km.PEM))
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse public key: %w", err)
+	}
+	km.publicKey = publicKey
+	return publicKey, nil
+}

attestation/verify_test.go

@@ -4,8 +4,8 @@ import (
 	"encoding/base64"
 	"testing"
 
+	"github.com/docker/attest/attestation"
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/attestation"
 	intoto "github.com/in-toto/in-toto-golang/in_toto"
 	ociv1 "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/stretchr/testify/assert"
@@ -42,8 +42,7 @@ func TestVerifyUnsignedAttestation(t *testing.T) {
 	opts := &attestation.VerifyOptions{
 		Keys: attestation.Keys{},
 	}
-
-	_, err := attestation.VerifyDSSE(ctx, env, opts)
+	_, err := attestation.VerifyDSSE(ctx, nil, env, opts)
 	assert.Error(t, err)
 	assert.Contains(t, err.Error(), "no signatures")
 }

example_sign_test.go

@@ -3,10 +3,11 @@ package attest_test
 import (
 	"context"
 
-	"github.com/docker/attest/pkg/attest"
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/signerverifier"
+	"github.com/docker/attest"
+	"github.com/docker/attest/attestation"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/signerverifier"
+	"github.com/docker/attest/tlog"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/empty"
 	"github.com/google/go-containerregistry/pkg/v1/mutate"
@@ -25,13 +26,19 @@ func ExampleSignStatements_remote() {
 	// signer, err := signerverifier.GetAWSSigner(cmd.Context(), aws_arn, aws_region)
 
 	// configure signing options
+
+	// use rekor transparency log wit static rekor public key (see options to use dynamic rekor public key)
+	rekor, err := tlog.NewRekorLog()
+	if err != nil {
+		panic(err)
+	}
 	opts := &attestation.SigningOptions{
-		SkipTL: true, // skip trust logging to a transparency log
+		TransparencyLog: rekor, // unset this to disable signature transparency logging
 	}
 
 	// load image index with unsigned attestation-manifests
 	ref := "docker/image-signer-verifier:latest"
-	attIdx, err := oci.IndexFromRemote(ref)
+	attIdx, err := oci.IndexFromRemote(context.Background(), ref)
 	if err != nil {
 		panic(err)
 	}
@@ -54,7 +61,7 @@ func ExampleSignStatements_remote() {
 	}
 
 	// push image index with signed attestation-manifests
-	err = oci.PushIndexToRegistry(signedIndex, ref)
+	err = oci.PushIndexToRegistry(context.Background(), signedIndex, ref)
 	if err != nil {
 		panic(err)
 	}

example_verify_test.go

@@ -6,10 +6,10 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/docker/attest/pkg/attest"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/policy"
-	"github.com/docker/attest/pkg/tuf"
+	"github.com/docker/attest"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/policy"
+	"github.com/docker/attest/tuf"
 )
 
 func ExampleVerify_remote() {

go.mod

@@ -4,27 +4,28 @@ go 1.22.5
 
 require (
 	github.com/Masterminds/semver/v3 v3.3.0
-	github.com/aws/aws-sdk-go-v2/config v1.27.31
+	github.com/aws/aws-sdk-go-v2/config v1.27.38
 	github.com/awslabs/amazon-ecr-credential-helper/ecr-login v0.0.0-20231024185945-8841054dbdb8
+	github.com/containerd/containerd/v2 v2.0.0-rc.4
 	github.com/containerd/platforms v0.2.1
 	github.com/distribution/reference v0.6.0
+	github.com/docker-library/bashbrew v0.1.12
 	github.com/go-openapi/runtime v0.28.0
 	github.com/go-openapi/strfmt v0.23.0
-	github.com/google/go-containerregistry v0.20.1
-	github.com/hashicorp/go-cleanhttp v0.5.2
+	github.com/google/go-containerregistry v0.20.2
 	github.com/in-toto/in-toto-golang v0.9.0
-	github.com/open-policy-agent/opa v0.67.1
+	github.com/open-policy-agent/opa v0.68.0
 	github.com/opencontainers/image-spec v1.1.0
 	github.com/package-url/packageurl-go v0.1.3
 	github.com/secure-systems-lab/go-securesystemslib v0.8.0
 	github.com/sigstore/cosign/v2 v2.4.0
 	github.com/sigstore/rekor v1.3.6
-	github.com/sigstore/sigstore/pkg/signature/kms/aws v1.8.8
-	github.com/sigstore/sigstore/pkg/signature/kms/gcp v1.8.8
+	github.com/sigstore/sigstore v1.8.9
+	github.com/sigstore/sigstore/pkg/signature/kms/aws v1.8.9
+	github.com/sigstore/sigstore/pkg/signature/kms/gcp v1.8.9
 	github.com/stretchr/testify v1.9.0
-	github.com/testcontainers/testcontainers-go/modules/registry v0.33.0
 	github.com/theupdateframework/go-tuf/v2 v2.0.0
-	google.golang.org/api v0.194.0
+	google.golang.org/api v0.199.0
 	sigs.k8s.io/yaml v1.4.0
 )
 
@@ -33,53 +34,47 @@ replace github.com/google/go-containerregistry => github.com/docker/go-container
 
 require (
 	cloud.google.com/go v0.115.1 // indirect
-	cloud.google.com/go/auth v0.9.1 // indirect
+	cloud.google.com/go/auth v0.9.5 // indirect
 	cloud.google.com/go/auth/oauth2adapt v0.2.4 // indirect
-	cloud.google.com/go/compute/metadata v0.5.0 // indirect
-	cloud.google.com/go/iam v1.1.12 // indirect
-	cloud.google.com/go/kms v1.18.4 // indirect
-	cloud.google.com/go/longrunning v0.5.11 // indirect
-	dario.cat/mergo v1.0.0 // indirect
-	github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 // indirect
-	github.com/Microsoft/go-winio v0.6.2 // indirect
+	cloud.google.com/go/compute/metadata v0.5.2 // indirect
+	cloud.google.com/go/iam v1.2.0 // indirect
+	cloud.google.com/go/kms v1.19.0 // indirect
+	cloud.google.com/go/longrunning v0.6.0 // indirect
+	github.com/Microsoft/hcsshim v0.12.6 // indirect
 	github.com/OneOfOne/xxhash v1.2.8 // indirect
 	github.com/ProtonMail/go-crypto v1.0.0 // indirect
 	github.com/agnivade/levenshtein v1.1.1 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
-	github.com/aws/aws-sdk-go-v2 v1.30.4 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.17.30 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.12 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.16 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.16 // indirect
+	github.com/aws/aws-sdk-go-v2 v1.31.0 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.17.36 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.14 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.18 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.18 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ecr v1.29.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ecrpublic v1.24.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.4 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.11.18 // indirect
-	github.com/aws/aws-sdk-go-v2/service/kms v1.35.3 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.22.5 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.26.5 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.30.5 // indirect
-	github.com/aws/smithy-go v1.20.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.5 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.11.20 // indirect
+	github.com/aws/aws-sdk-go-v2/service/kms v1.35.5 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.23.2 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.27.2 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.31.2 // indirect
+	github.com/aws/smithy-go v1.21.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/blang/semver v3.5.1+incompatible // indirect
-	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cloudflare/circl v1.3.8 // indirect
-	github.com/containerd/containerd v1.7.20 // indirect
+	github.com/containerd/containerd v1.7.21 // indirect
+	github.com/containerd/errdefs v0.1.0 // indirect
 	github.com/containerd/log v0.1.0 // indirect
 	github.com/containerd/stargz-snapshotter/estargz v0.15.1 // indirect
-	github.com/cpuguy83/dockercfg v0.3.1 // indirect
 	github.com/cyberphone/json-canonicalization v0.0.0-20231217050601-ba74d44ecf5f // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/digitorus/pkcs7 v0.0.0-20230818184609-3a137a874352 // indirect
 	github.com/digitorus/timestamp v0.0.0-20231217203849-220c5c2851b7 // indirect
 	github.com/docker/cli v27.1.1+incompatible // indirect
 	github.com/docker/distribution v2.8.3+incompatible // indirect
-	github.com/docker/docker v27.1.1+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.8.1 // indirect
-	github.com/docker/go-connections v0.5.0 // indirect
-	github.com/docker/go-units v0.5.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
@@ -88,7 +83,6 @@ require (
 	github.com/go-jose/go-jose/v4 v4.0.2 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/go-openapi/analysis v0.23.0 // indirect
 	github.com/go-openapi/errors v0.22.0 // indirect
 	github.com/go-openapi/jsonpointer v0.21.0 // indirect
@@ -98,45 +92,37 @@ require (
 	github.com/go-openapi/swag v0.23.0 // indirect
 	github.com/go-openapi/validate v0.24.0 // indirect
 	github.com/gobwas/glob v0.2.3 // indirect
-	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/certificate-transparency-go v1.2.1 // indirect
 	github.com/google/s2a-go v0.1.8 // indirect
 	github.com/google/uuid v1.6.0 // indirect
-	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.3.4 // indirect
 	github.com/googleapis/gax-go/v2 v2.13.0 // indirect
 	github.com/gorilla/mux v1.8.1 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-retryablehttp v0.7.7 // indirect
 	github.com/hashicorp/hcl v1.0.1-vault-5 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jedisct1/go-minisign v0.0.0-20230811132847-661be99b8267 // indirect
-	github.com/jellydator/ttlcache/v3 v3.2.0 // indirect
+	github.com/jellydator/ttlcache/v3 v3.3.0 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
-	github.com/klauspost/compress v1.17.8 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
 	github.com/letsencrypt/boulder v0.0.0-20240620165639-de9c06129bec // indirect
-	github.com/lufia/plan9stats v0.0.0-20240513124658-fba389f38bae // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mitchellh/go-homedir v1.1.0 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/moby/docker-image-spec v1.3.1 // indirect
-	github.com/moby/patternmatcher v0.6.0 // indirect
-	github.com/moby/sys/sequential v0.5.0 // indirect
-	github.com/moby/sys/user v0.1.0 // indirect
-	github.com/moby/term v0.5.0 // indirect
-	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/nozzle/throttler v0.0.0-20180817012639-2ea982251481 // indirect
 	github.com/oklog/ulid v1.3.1 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.3 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
-	github.com/prometheus/client_golang v1.19.1 // indirect
+	github.com/prometheus/client_golang v1.20.2 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
 	github.com/prometheus/common v0.55.0 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
@@ -145,10 +131,7 @@ require (
 	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
 	github.com/sassoftware/relic v7.2.1+incompatible // indirect
 	github.com/shibumi/go-pathspec v1.3.0 // indirect
-	github.com/shirou/gopsutil/v3 v3.24.4 // indirect
-	github.com/shoenig/go-m1cpu v0.1.6 // indirect
 	github.com/sigstore/protobuf-specs v0.3.2 // indirect
-	github.com/sigstore/sigstore v1.8.8 // indirect
 	github.com/sigstore/timestamp-authority v1.2.2 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/sourcegraph/conc v0.3.0 // indirect
@@ -160,44 +143,43 @@ require (
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d // indirect
 	github.com/tchap/go-patricia/v2 v2.3.1 // indirect
-	github.com/testcontainers/testcontainers-go v0.33.0 // indirect
 	github.com/theupdateframework/go-tuf v0.7.0 // indirect
 	github.com/titanous/rocacheck v0.0.0-20171023193734-afe73141d399 // indirect
-	github.com/tklauser/go-sysconf v0.3.14 // indirect
-	github.com/tklauser/numcpus v0.8.0 // indirect
 	github.com/transparency-dev/merkle v0.0.2 // indirect
 	github.com/vbatts/tar-split v0.11.5 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/yashtewari/glob-intersection v0.2.0 // indirect
-	github.com/yusufpapurcu/wmi v1.2.4 // indirect
 	go.mongodb.org/mongo-driver v1.15.0 // indirect
 	go.opencensus.io v0.24.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.52.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0 // indirect
-	go.opentelemetry.io/otel v1.28.0 // indirect
-	go.opentelemetry.io/otel/metric v1.28.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.54.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.54.0 // indirect
+	go.opentelemetry.io/otel v1.29.0 // indirect
+	go.opentelemetry.io/otel/metric v1.29.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.28.0 // indirect
-	go.opentelemetry.io/otel/trace v1.28.0 // indirect
+	go.opentelemetry.io/otel/trace v1.29.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
-	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/crypto v0.27.0 // indirect
 	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 // indirect
-	golang.org/x/mod v0.19.0 // indirect
-	golang.org/x/net v0.28.0 // indirect
-	golang.org/x/oauth2 v0.22.0 // indirect
+	golang.org/x/mod v0.20.0 // indirect
+	golang.org/x/net v0.29.0 // indirect
+	golang.org/x/oauth2 v0.23.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
-	golang.org/x/term v0.23.0 // indirect
-	golang.org/x/text v0.17.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+	golang.org/x/term v0.24.0 // indirect
+	golang.org/x/text v0.18.0 // indirect
 	golang.org/x/time v0.6.0 // indirect
-	google.golang.org/genproto v0.0.0-20240814211410-ddb44dafa142 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240730163845-b1a4ccb954bf // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 // indirect
-	google.golang.org/grpc v1.65.0 // indirect
+	google.golang.org/genproto v0.0.0-20240903143218-8af14fe29dc1 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240827150818-7e3bb234dfed // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240903143218-8af14fe29dc1 // indirect
+	google.golang.org/grpc v1.67.0 // indirect
 	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/klog/v2 v2.120.1 // indirect
+	gotest.tools/v3 v3.5.1 // indirect
+	k8s.io/klog/v2 v2.130.1 // indirect
+	pault.ag/go/debian v0.12.0 // indirect
+	pault.ag/go/topsort v0.1.1 // indirect
 )

go.sum

@@ -1,28 +1,24 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.115.1 h1:Jo0SM9cQnSkYfp44+v+NQXHpcHqlnRJk2qxh6yvxxxQ=
 cloud.google.com/go v0.115.1/go.mod h1:DuujITeaufu3gL68/lOFIirVNJwQeyf5UXyi+Wbgknc=
-cloud.google.com/go/auth v0.9.1 h1:+pMtLEV2k0AXKvs/tGZojuj6QaioxfUjOpMsG5Gtx+w=
-cloud.google.com/go/auth v0.9.1/go.mod h1:Sw8ocT5mhhXxFklyhT12Eiy0ed6tTrPMCJjSI8KhYLk=
+cloud.google.com/go/auth v0.9.5 h1:4CTn43Eynw40aFVr3GpPqsQponx2jv0BQpjvajsbbzw=
+cloud.google.com/go/auth v0.9.5/go.mod h1:Xo0n7n66eHyOWWCnitop6870Ilwo3PiZyodVkkH1xWM=
 cloud.google.com/go/auth/oauth2adapt v0.2.4 h1:0GWE/FUsXhf6C+jAkWgYm7X9tK8cuEIfy19DBn6B6bY=
 cloud.google.com/go/auth/oauth2adapt v0.2.4/go.mod h1:jC/jOpwFP6JBxhB3P5Rr0a9HLMC/Pe3eaL4NmdvqPtc=
-cloud.google.com/go/compute/metadata v0.5.0 h1:Zr0eK8JbFv6+Wi4ilXAR8FJ3wyNdpxHKJNPos6LTZOY=
-cloud.google.com/go/compute/metadata v0.5.0/go.mod h1:aHnloV2TPI38yx4s9+wAZhHykWvVCfu7hQbF+9CWoiY=
-cloud.google.com/go/iam v1.1.12 h1:JixGLimRrNGcxvJEQ8+clfLxPlbeZA6MuRJ+qJNQ5Xw=
-cloud.google.com/go/iam v1.1.12/go.mod h1:9LDX8J7dN5YRyzVHxwQzrQs9opFFqn0Mxs9nAeB+Hhg=
-cloud.google.com/go/kms v1.18.4 h1:dYN3OCsQ6wJLLtOnI8DGUwQ5shMusXsWCCC+s09ATsk=
-cloud.google.com/go/kms v1.18.4/go.mod h1:SG1bgQ3UWW6/KdPo9uuJnzELXY5YTTMJtDYvajiQ22g=
-cloud.google.com/go/longrunning v0.5.11 h1:Havn1kGjz3whCfoD8dxMLP73Ph5w+ODyZB9RUsDxtGk=
-cloud.google.com/go/longrunning v0.5.11/go.mod h1:rDn7//lmlfWV1Dx6IB4RatCPenTwwmqXuiP0/RgoEO4=
+cloud.google.com/go/compute/metadata v0.5.2 h1:UxK4uu/Tn+I3p2dYWTfiX4wva7aYlKixAHn3fyqngqo=
+cloud.google.com/go/compute/metadata v0.5.2/go.mod h1:C66sj2AluDcIqakBq/M8lw8/ybHgOZqin2obFxa/E5k=
+cloud.google.com/go/iam v1.2.0 h1:kZKMKVNk/IsSSc/udOb83K0hL/Yh/Gcqpz+oAkoIFN8=
+cloud.google.com/go/iam v1.2.0/go.mod h1:zITGuWgsLZxd8OwAlX+eMFgZDXzBm7icj1PVTYG766Q=
+cloud.google.com/go/kms v1.19.0 h1:x0OVJDl6UH1BSX4THKlMfdcFWoE4ruh90ZHuilZekrU=
+cloud.google.com/go/kms v1.19.0/go.mod h1:e4imokuPJUc17Trz2s6lEXFDt8bgDmvpVynH39bdrHM=
+cloud.google.com/go/longrunning v0.6.0 h1:mM1ZmaNsQsnb+5n1DNPeL0KwQd9jQRqSqSDEkBZr+aI=
+cloud.google.com/go/longrunning v0.6.0/go.mod h1:uHzSZqW89h7/pasCWNYdUpwGz3PcVWhrWupreVPYLts=
 cuelabs.dev/go/oci/ociregistry v0.0.0-20240404174027-a39bec0462d2 h1:BnG6pr9TTr6CYlrJznYUDj6V7xldD1W+1iXPum0wT/w=
 cuelabs.dev/go/oci/ociregistry v0.0.0-20240404174027-a39bec0462d2/go.mod h1:pK23AUVXuNzzTpfMCA06sxZGeVQ/75FdVtW249de9Uo=
 cuelang.org/go v0.9.2 h1:pfNiry2PdRBr02G/aKm5k2vhzmqbAOoaB4WurmEbWvs=
 cuelang.org/go v0.9.2/go.mod h1:qpAYsLOf7gTM1YdEg6cxh553uZ4q9ZDWlPbtZr9q1Wk=
-dario.cat/mergo v1.0.0 h1:AGCNq9Evsj31mOgNPcLyXc+4PNABt905YmuqPYYpBWk=
-dario.cat/mergo v1.0.0/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
-github.com/AdaLogics/go-fuzz-headers v0.0.0-20230811130428-ced1acdcaa24 h1:bvDV9vkmnHYOMsOr4WLk+Vo07yKIzd94sVoIqshQ4bU=
-github.com/AdaLogics/go-fuzz-headers v0.0.0-20230811130428-ced1acdcaa24/go.mod h1:8o94RPi1/7XTJvwPpRSzSUedZrtlirdB3r9Z20bi2f8=
 github.com/AdamKorcz/go-fuzz-headers-1 v0.0.0-20230919221257-8b5d3ce2d11d h1:zjqpY4C7H15HjRPEenkS4SAn3Jy2eRRjkjZbGR30TOg=
 github.com/AdamKorcz/go-fuzz-headers-1 v0.0.0-20230919221257-8b5d3ce2d11d/go.mod h1:XNqJ7hv2kY++g8XEHREpi+JqZo3+0l+CH2egBVN4yqM=
 github.com/AliyunContainerService/ack-ram-tool/pkg/credentials/alibabacloudsdkgo/helper v0.2.0 h1:8+4G8JaejP8Xa6W46PzJEwisNgBXMvFcz78N6zG/ARw=
@@ -39,8 +35,6 @@ github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/azkeys v1.1.0 h1:DRiANoJ
 github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/azkeys v1.1.0/go.mod h1:qLIye2hwb/ZouqhpSD9Zn3SJipvpEnz1Ywl3VUk9Y0s=
 github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/internal v1.0.0 h1:D3occbWoio4EBLkbkevetNMAVX197GkzbUMtqjGWn80=
 github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/internal v1.0.0/go.mod h1:bTSOgj05NGRuHHhQwAdPnYr9TOdNmKlZTgGLL6nyAdI=
-github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 h1:L/gRVlceqvL25UVaW/CKtUDjefjrs0SPonmDGUVOYP0=
-github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
 github.com/Azure/go-autorest v14.2.0+incompatible h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=
 github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
 github.com/Azure/go-autorest/autorest v0.11.29 h1:I4+HL/JDvErx2LjyzaVxllw2lRDB5/BT2Bm4g20iqYw=
@@ -60,10 +54,13 @@ github.com/Azure/go-autorest/tracing v0.6.0/go.mod h1:+vhtPC754Xsa23ID7GlGsrdKBp
 github.com/AzureAD/microsoft-authentication-library-for-go v1.2.2 h1:XHOnouVk1mxXfQidrMEnLlPk9UMeRtyBTnEFtxkV0kU=
 github.com/AzureAD/microsoft-authentication-library-for-go v1.2.2/go.mod h1:wP83P5OoQ5p6ip3ScPr0BAq0BvuPAvacpEuSzyouqAI=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/DataDog/zstd v1.4.8/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw=
 github.com/Masterminds/semver/v3 v3.3.0 h1:B8LGeaivUe71a5qox1ICM/JLl0NqZSW5CHyL+hmvYS0=
 github.com/Masterminds/semver/v3 v3.3.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
 github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
 github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
+github.com/Microsoft/hcsshim v0.12.6 h1:qEnZjoHXv+4/s0LmKZWE0/AiZmMWEIkFfWBSf1a0wlU=
+github.com/Microsoft/hcsshim v0.12.6/go.mod h1:ZABCLVcvLMjIkzr9rUGcQ1QA0p0P3Ps+d3N1g2DsFfk=
 github.com/OneOfOne/xxhash v1.2.8 h1:31czK/TI9sNkxIKfaUfGlU47BAxQ0ztGgd9vPyqimf8=
 github.com/OneOfOne/xxhash v1.2.8/go.mod h1:eZbhyaAYD41SGSSsnmcpxVoRiQ/MPUTjUdIIOT9Um7Q=
 github.com/ProtonMail/go-crypto v1.0.0 h1:LRuvITjQWX+WIfr930YHG2HNfjR1uOfyf5vE0kC2U78=
@@ -102,38 +99,38 @@ github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3d
 github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
 github.com/aws/aws-sdk-go v1.55.5 h1:KKUZBfBoyqy5d3swXyiC7Q76ic40rYcbqH7qjh59kzU=
 github.com/aws/aws-sdk-go v1.55.5/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
-github.com/aws/aws-sdk-go-v2 v1.30.4 h1:frhcagrVNrzmT95RJImMHgabt99vkXGslubDaDagTk8=
-github.com/aws/aws-sdk-go-v2 v1.30.4/go.mod h1:CT+ZPWXbYrci8chcARI3OmI/qgd+f6WtuLOoaIA8PR0=
-github.com/aws/aws-sdk-go-v2/config v1.27.31 h1:kxBoRsjhT3pq0cKthgj6RU6bXTm/2SgdoUMyrVw0rAI=
-github.com/aws/aws-sdk-go-v2/config v1.27.31/go.mod h1:z04nZdSWFPaDwK3DdJOG2r+scLQzMYuJeW0CujEm9FM=
-github.com/aws/aws-sdk-go-v2/credentials v1.17.30 h1:aau/oYFtibVovr2rDt8FHlU17BTicFEMAi29V1U+L5Q=
-github.com/aws/aws-sdk-go-v2/credentials v1.17.30/go.mod h1:BPJ/yXV92ZVq6G8uYvbU0gSl8q94UB63nMT5ctNO38g=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.12 h1:yjwoSyDZF8Jth+mUk5lSPJCkMC0lMy6FaCD51jm6ayE=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.12/go.mod h1:fuR57fAgMk7ot3WcNQfb6rSEn+SUffl7ri+aa8uKysI=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.16 h1:TNyt/+X43KJ9IJJMjKfa3bNTiZbUP7DeCxfbTROESwY=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.16/go.mod h1:2DwJF39FlNAUiX5pAc0UNeiz16lK2t7IaFcm0LFHEgc=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.16 h1:jYfy8UPmd+6kJW5YhY0L1/KftReOGxI/4NtVSTh9O/I=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.16/go.mod h1:7ZfEPZxkW42Afq4uQB8H2E2e6ebh6mXTueEpYzjCzcs=
+github.com/aws/aws-sdk-go-v2 v1.31.0 h1:3V05LbxTSItI5kUqNwhJrrrY1BAXxXt0sN0l72QmG5U=
+github.com/aws/aws-sdk-go-v2 v1.31.0/go.mod h1:ztolYtaEUtdpf9Wftr31CJfLVjOnD/CVRkKOOYgF8hA=
+github.com/aws/aws-sdk-go-v2/config v1.27.38 h1:mMVyJJuSUdbD4zKXoxDgWrgM60QwlFEg+JhihCq6wCw=
+github.com/aws/aws-sdk-go-v2/config v1.27.38/go.mod h1:6xOiNEn58bj/64MPKx89r6G/el9JZn8pvVbquSqTKK4=
+github.com/aws/aws-sdk-go-v2/credentials v1.17.36 h1:zwI5WrT+oWWfzSKoTNmSyeBKQhsFRJRv+PGW/UZW+Yk=
+github.com/aws/aws-sdk-go-v2/credentials v1.17.36/go.mod h1:3AG/sY1rc9NJrNWcN/3KPU4SIDPGTrd/qegKB0TnFdE=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.14 h1:C/d03NAmh8C4BZXhuRNboF/DqhBkBCeDiJDcaqIT5pA=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.14/go.mod h1:7I0Ju7p9mCIdlrfS+JCgqcYD0VXz/N4yozsox+0o078=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.18 h1:kYQ3H1u0ANr9KEKlGs/jTLrBFPo8P8NaH/w7A01NeeM=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.18/go.mod h1:r506HmK5JDUh9+Mw4CfGJGSSoqIiLCndAuqXuhbv67Y=
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@@ -178,8 +175,12 @@ github.com/codahale/rfc6979 v0.0.0-20141003034818-6a90f24967eb h1:EDmT6Q9Zs+SbUo
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@@ -188,11 +189,7 @@ github.com/containerd/stargz-snapshotter/estargz v0.15.1 h1:eXJjw9RbkLFgioVaTG+G
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@@ -216,20 +213,16 @@ github.com/dimchansky/utfbom v1.1.1 h1:vV6w1AhK4VMnhBno/TPVCoK9U/LP0PkLCS9tbxHdi
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@@ -255,6 +248,8 @@ github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4
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@@ -268,9 +263,6 @@ github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
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@@ -307,8 +299,8 @@ github.com/golang-jwt/jwt/v4 v4.5.0/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w
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@@ -342,7 +334,6 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -362,8 +353,8 @@ github.com/google/trillian v1.6.0/go.mod h1:Yu3nIMITzNhhMJEHjAtp6xKiu+H/iHu2Oq5F
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@@ -405,8 +396,8 @@ github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2
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@@ -417,10 +408,9 @@ github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8Hm
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@@ -429,9 +419,6 @@ github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0
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@@ -450,22 +437,10 @@ github.com/mitchellh/go-wordwrap v1.0.1 h1:TLuKupo69TCn6TQSyGxwI1EblZZEsQ0vMlAFQ
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@@ -491,8 +466,8 @@ github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1y
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@@ -503,8 +478,8 @@ github.com/package-url/packageurl-go v0.1.3 h1:4juMED3hHiz0set3Vq3KeQ75KD1avthoX
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@@ -512,11 +487,8 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
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@@ -547,12 +519,6 @@ github.com/segmentio/ksuid v1.0.4 h1:sBo2BdShXjmcugAMwjugoGUdUV0pcxY5mW4xKRn3v4c
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@@ -561,16 +527,16 @@ github.com/sigstore/protobuf-specs v0.3.2 h1:nCVARCN+fHjlNCk3ThNXwrZRqIommIeNKWw
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 github.com/sigstore/timestamp-authority v1.2.2 h1:X4qyutnCQqJ0apMewFyx+3t7Tws00JQ/JonBiu3QvLE=
@@ -596,7 +562,6 @@ github.com/spiffe/go-spiffe/v2 v2.3.0/go.mod h1:Oxsaio7DBgSNqhAO9i/9tLClaVlfRok7
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
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@@ -604,7 +569,6 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
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 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
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 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
@@ -613,10 +577,6 @@ github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d h1:vfofYNRScrDd
 github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d/go.mod h1:RRCYJbIwD5jmqPI9XoAFR0OcDxqUctll6zUj/+B4S48=
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-github.com/testcontainers/testcontainers-go v0.33.0 h1:zJS9PfXYT5O0ZFXM2xxXfk4J5UMw/kRiISng037Gxdw=
-github.com/testcontainers/testcontainers-go v0.33.0/go.mod h1:W80YpTa8D5C3Yy16icheD01UTDu+LmXIA2Keo+jWtT8=
-github.com/testcontainers/testcontainers-go/modules/registry v0.33.0 h1:rpQS5KcFpyRPM3xVKERuXDqUcE5xjwE8MQUgmKVkL0o=
-github.com/testcontainers/testcontainers-go/modules/registry v0.33.0/go.mod h1:qr3nJgBZ2ovQva6vadXchwi786/mBBDzhBPbrmWkYIE=
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@@ -627,29 +587,23 @@ github.com/titanous/rocacheck v0.0.0-20171023193734-afe73141d399 h1:e/5i7d4oYZ+C
 github.com/titanous/rocacheck v0.0.0-20171023193734-afe73141d399/go.mod h1:LdwHTNJT99C5fTAzDz0ud328OgXz+gierycbcIx2fRs=
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-github.com/tklauser/go-sysconf v0.3.12/go.mod h1:Ho14jnntGE1fpdOqQEEaiKRpvIavV0hSfmBq8nJbHYI=
-github.com/tklauser/go-sysconf v0.3.14 h1:g5vzr9iPFFz24v2KZXs/pvpvh8/V9Fw6vQK5ZZb78yU=
-github.com/tklauser/go-sysconf v0.3.14/go.mod h1:1ym4lWMLUOhuBOPGtRcJm7tEGX4SCYNEEEtghGG/8uY=
-github.com/tklauser/numcpus v0.6.1/go.mod h1:1XfjsgE2zo8GVw7POkMbHENHzVg3GzmoZ9fESEdAacY=
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-github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
-github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
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 github.com/zeebo/errs v1.3.0 h1:hmiaKqgYZzcVgRL1Vkc1Mn2914BbzB0IBxs+ebeutGs=
@@ -658,24 +612,22 @@ go.mongodb.org/mongo-driver v1.15.0 h1:rJCKC8eEliewXjZGf0ddURtl7tTVy1TK3bfl0gkUS
 go.mongodb.org/mongo-driver v1.15.0/go.mod h1:Vzb0Mk/pa7e6cWw85R4F/endUC3u0U9jGcNU603k65c=
 go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
 go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
-go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.52.0 h1:vS1Ao/R55RNV4O7TA2Qopok8yN+X0LIP6RVWLFkprck=
-go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.52.0/go.mod h1:BMsdeOxN04K0L5FNUBfjFdvwWGNe/rkmSwH4Aelu/X0=
-go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0 h1:4K4tsIXefpVJtvA/8srF4V4y0akAoPHkIslgAkjixJA=
-go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0/go.mod h1:jjdQuTGVsXV4vSs+CJ2qYDeDPf9yIJV23qlIzBm73Vg=
-go.opentelemetry.io/otel v1.28.0 h1:/SqNcYk+idO0CxKEUOtKQClMK/MimZihKYMruSMViUo=
-go.opentelemetry.io/otel v1.28.0/go.mod h1:q68ijF8Fc8CnMHKyzqL6akLO46ePnjkgfIMIjUIX9z4=
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+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.54.0/go.mod h1:L7UH0GbB0p47T4Rri3uHjbpCFYrVrwc1I25QhNPiGK8=
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 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.28.0 h1:R3X6ZXmNPRR8ul6i3WgFURCHzaXjHdm0karRG/+dj3s=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.28.0/go.mod h1:QWFXnDavXWwMx2EEcZsf3yxgEKAqsxQ+Syjp+seyInw=
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-go.opentelemetry.io/otel/metric v1.28.0/go.mod h1:Fb1eVBFZmLVTMb6PPohq3TO9IIhUisDsbJoL/+uQW4s=
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 go.step.sm/crypto v0.51.1 h1:ktUg/2hetEMiBAqgz502ktZDGoDoGrcHFg3XpkmkvvA=
@@ -689,23 +641,23 @@ go.uber.org/zap v1.27.0/go.mod h1:GB2qFLM7cTU87MWRP2mPIjqfIDnGu+VIO4V/SdhGo2E=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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 golang.org/x/crypto v0.7.0/go.mod h1:pYwdfH91IfpZVANVyUOhSIPZaFoJGxTFbZhFTx+dXZU=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
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 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
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-golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
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-golang.org/x/mod v0.19.0 h1:fEdghXQSo20giMthA7cd28ZC+jts4amQ3YMXiP5oMQ8=
-golang.org/x/mod v0.19.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
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 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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@@ -713,7 +665,6 @@ golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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@@ -725,15 +676,14 @@ golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug
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-golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
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@@ -744,40 +694,33 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -785,8 +728,8 @@ golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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@@ -795,9 +738,7 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
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@@ -807,26 +748,26 @@ golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8T
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+google.golang.org/grpc v1.67.0/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -863,24 +804,29 @@ gotest.tools/v3 v3.5.1 h1:EENdUnS3pdur5nybKYIh2Vfgc8IUNBjxDPSjtiJcOzU=
 gotest.tools/v3 v3.5.1/go.mod h1:isy3WKz7GK6uNw/sbHzfKBLvlvXwUyV06n6brMxxopU=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-k8s.io/api v0.28.3 h1:Gj1HtbSdB4P08C8rs9AR94MfSGpRhJgsS+GF9V26xMM=
-k8s.io/api v0.28.3/go.mod h1:MRCV/jr1dW87/qJnZ57U5Pak65LGmQVkKTzf3AtKFHc=
-k8s.io/apimachinery v0.28.3 h1:B1wYx8txOaCQG0HmYF6nbpU8dg6HvA06x5tEffvOe7A=
-k8s.io/apimachinery v0.28.3/go.mod h1:uQTKmIqs+rAYaq+DFaoD2X7pcjLOqbQX2AOiO0nIpb8=
-k8s.io/client-go v0.28.3 h1:2OqNb72ZuTZPKCl+4gTKvqao0AMOl9f3o2ijbAj3LI4=
-k8s.io/client-go v0.28.3/go.mod h1:LTykbBp9gsA7SwqirlCXBWtK0guzfhpoW4qSm7i9dxo=
-k8s.io/klog/v2 v2.120.1 h1:QXU6cPEOIslTGvZaXvFWiP9VKyeet3sawzTOvdXb4Vw=
-k8s.io/klog/v2 v2.120.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
+k8s.io/api v0.31.0 h1:b9LiSjR2ym/SzTOlfMHm1tr7/21aD7fSkqgD/CVJBCo=
+k8s.io/api v0.31.0/go.mod h1:0YiFF+JfFxMM6+1hQei8FY8M7s1Mth+z/q7eF1aJkTE=
+k8s.io/apimachinery v0.31.0 h1:m9jOiSr3FoSSL5WO9bjm1n6B9KROYYgNZOb4tyZ1lBc=
+k8s.io/apimachinery v0.31.0/go.mod h1:rsPdaZJfTfLsNJSQzNHQvYoTmxhoOEofxtOsF3rtsMo=
+k8s.io/client-go v0.31.0 h1:QqEJzNjbN2Yv1H79SsS+SWnXkBgVu4Pj3CJQgbx0gI8=
+k8s.io/client-go v0.31.0/go.mod h1:Y9wvC76g4fLjmU0BA+rV+h2cncoadjvjjkkIGoTLcGU=
+k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
+k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
 k8s.io/kube-openapi v0.0.0-20231010175941-2dd684a91f00 h1:aVUu9fTY98ivBPKR9Y5w/AuzbMm96cd3YHRTU83I780=
 k8s.io/kube-openapi v0.0.0-20231010175941-2dd684a91f00/go.mod h1:AsvuZPBlUDVuCdzJ87iajxtXuR9oktsTctW/R9wwouA=
-k8s.io/utils v0.0.0-20240502163921-fe8a2dddb1d0 h1:jgGTlFYnhF1PM1Ax/lAlxUPE+KfCIXHaathvJg1C3ak=
-k8s.io/utils v0.0.0-20240502163921-fe8a2dddb1d0/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
+k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 h1:pUdcCO1Lk/tbT5ztQWOBi5HBgbBP1J8+AsQnQCKsi8A=
+k8s.io/utils v0.0.0-20240711033017-18e509b52bc8/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
+pault.ag/go/debian v0.12.0 h1:b8ctSdBSGJ98NE1VLn06aSx70EUpczlP2qqSHEiYYJA=
+pault.ag/go/debian v0.12.0/go.mod h1:UbnMr3z/KZepjq7VzbYgBEfz8j4+Pyrm2L5X1fzhy/k=
+pault.ag/go/topsort v0.0.0-20160530003732-f98d2ad46e1a/go.mod h1:INqx0ClF7kmPAMk2zVTX8DRnhZ/yaA/Mg52g8KFKE7k=
+pault.ag/go/topsort v0.1.1 h1:L0QnhUly6LmTv0e3DEzbN2q6/FGgAcQvaEw65S53Bg4=
+pault.ag/go/topsort v0.1.1/go.mod h1:r1kc/L0/FZ3HhjezBIPaNVhkqv8L0UJ9bxRuHRVZ0q4=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
 sigs.k8s.io/release-utils v0.8.4 h1:4QVr3UgbyY/d9p74LBhg0njSVQofUsAZqYOzVZBhdBw=
 sigs.k8s.io/release-utils v0.8.4/go.mod h1:m1bHfscTemQp+z+pLCZnkXih9n0+WukIUU70n6nFnU0=
-sigs.k8s.io/structured-merge-diff/v4 v4.3.0 h1:UZbZAZfX0wV2zr7YZorDz6GXROfDFj6LvqCRm4VUVKk=
-sigs.k8s.io/structured-merge-diff/v4 v4.3.0/go.mod h1:N8hJocpFajUSSeSJ9bOZ77VzejKZaXsTtZo4/u7Io08=
+sigs.k8s.io/structured-merge-diff/v4 v4.4.1 h1:150L+0vs/8DA78h1u02ooW1/fFq/Lwr+sGiqlzvrtq4=
+sigs.k8s.io/structured-merge-diff/v4 v4.4.1/go.mod h1:N8hJocpFajUSSeSJ9bOZ77VzejKZaXsTtZo4/u7Io08=
 sigs.k8s.io/yaml v1.4.0 h1:Mk1wCc2gy/F0THH0TAp1QYyJNzRm2KCLy3o5ASXVI5E=
 sigs.k8s.io/yaml v1.4.0/go.mod h1:Ejl7/uTz7PSA4eKMyQCUTnhZYNmLIl+5c2lQPGR2BPY=
 software.sslmate.com/src/go-pkcs12 v0.4.0 h1:H2g08FrTvSFKUj+D309j1DPfk5APnIdAQAB8aEykJ5k=

internal/test/test.go

@@ -2,26 +2,43 @@ package test
 
 import (
 	"context"
+	"crypto"
+	"crypto/x509"
+	_ "embed"
+	"encoding/pem"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"net/http/httptest"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 
-	"github.com/docker/attest/pkg/policy"
-	"github.com/docker/attest/pkg/signerverifier"
-	"github.com/docker/attest/pkg/tlog"
+	"github.com/docker/attest/signerverifier"
+	"github.com/docker/attest/useragent"
+	"github.com/google/go-containerregistry/pkg/registry"
 	"github.com/secure-systems-lab/go-securesystemslib/dsse"
 )
 
 const (
-	UseMockTL     = true
-	UseMockKMS    = true
-	UseMockPolicy = true
-
-	AWSRegion    = "us-east-1"
-	AWSKMSKeyARN = "arn:aws:kms:us-east-1:175142243308:alias/doi-signing" // sandbox
+	UseMockKMS                    = true
+	AWSRegion                     = "us-east-1"
+	AWSKMSKeyARN                  = "arn:aws:kms:us-east-1:175142243308:alias/doi-signing" // sandbox
+	UnsignedLinuxAMD64ImageDigest = "sha256:da8b190665956ea07890a0273e2a9c96bfe291662f08e2860e868eef69c34620"
+	UnsignedLinuxArm64ImageDigest = "sha256:7a76cec943853f9f7105b1976afa1bf7cd5bb6afc4e9d5852dd8da7cf81ae86e"
 )
 
-var UnsignedTestImage = filepath.Join("..", "..", "test", "testdata", "unsigned-test-image")
+func UnsignedTestIndex(rel ...string) string {
+	rel = append(rel, "test", "testdata", "unsigned-index")
+	return filepath.Join(rel...)
+}
+
+func UnsignedTestImage(rel ...string) string {
+	rel = append(rel, "test", "testdata", "unsigned-image")
+	return filepath.Join(rel...)
+}
 
 func CreateTempDir(t *testing.T, dir, pattern string) string {
 	// Create a temporary directory for output oci layout
@@ -39,33 +56,15 @@ func CreateTempDir(t *testing.T, dir, pattern string) string {
 	return tempDir
 }
 
+//go:embed test-signing-key.pem
+var signingKey []byte
+
 func GetMockSigner(_ context.Context) (dsse.SignerVerifier, error) {
-	priv, err := os.ReadFile(filepath.Join("..", "..", "test", "testdata", "test-signing-key.pem"))
-	if err != nil {
-		return nil, err
-	}
-	return signerverifier.LoadKeyPair(priv)
+	return signerverifier.LoadKeyPair(signingKey)
 }
 
 func Setup(t *testing.T) (context.Context, dsse.SignerVerifier) {
-	var tl tlog.TL
-	if UseMockTL {
-		tl = tlog.GetMockTL()
-	} else {
-		tl = &tlog.RekorTL{}
-	}
-
-	ctx := tlog.WithTL(context.Background(), tl)
-
-	var policyEvaluator policy.Evaluator
-	if UseMockPolicy {
-		policyEvaluator = policy.GetMockPolicy()
-	} else {
-		policyEvaluator = policy.NewRegoEvaluator(true)
-	}
-
-	ctx = policy.WithPolicyEvaluator(ctx, policyEvaluator)
-
+	ctx := context.Background()
 	var signer dsse.SignerVerifier
 	var err error
 	if UseMockKMS {
@@ -82,3 +81,31 @@ func Setup(t *testing.T) (context.Context, dsse.SignerVerifier) {
 
 	return ctx, signer
 }
+
+func NewLocalRegistry(ctx context.Context, options ...registry.Option) *httptest.Server {
+	options = append(options, registry.Logger(log.New(io.Discard, "", log.LstdFlags)))
+	regHandler := registry.New(options...)
+	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Check the user agent
+		ua := r.Header.Get("User-Agent")
+		userAgent := useragent.Get(ctx)
+		if !strings.HasPrefix(ua, userAgent) {
+			http.Error(w, fmt.Sprintf("expected user agent to contain %q, got %q", userAgent, ua), http.StatusForbidden)
+		}
+		regHandler.ServeHTTP(w, r)
+	}))
+}
+
+func PublicKeyToPEM(pubKey crypto.PublicKey) (string, error) {
+	derBytes, err := x509.MarshalPKIXPublicKey(pubKey)
+	if err != nil {
+		return "", err
+	}
+
+	pemBlock := &pem.Block{
+		Type:  "PUBLIC KEY",
+		Bytes: derBytes,
+	}
+
+	return string(pem.EncodeToMemory(pemBlock)), nil
+}

mapping/mapping.go

@@ -0,0 +1,138 @@
+package mapping
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+
+	"github.com/docker/attest/tuf"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	"sigs.k8s.io/yaml"
+)
+
+const (
+	MappingFilename = "mapping.yaml"
+)
+
+func validateMappingsFile(mappings *policyMappingsFile) error {
+	var validationErrors []error
+	if mappings.Kind != "policy-mapping" {
+		validationErrors = append(validationErrors, fmt.Errorf("file is not of kind policy-mapping: %s", mappings.Kind))
+	}
+	if mappings.Version != "v1" {
+		validationErrors = append(validationErrors, fmt.Errorf("unsupported policy mapping file version: %s", mappings.Version))
+	}
+	for _, rule := range mappings.Rules {
+		if rule.Pattern == "" {
+			validationErrors = append(validationErrors, fmt.Errorf("rule missing pattern: %s", rule))
+		}
+		if rule.PolicyID == "" && rule.Replacement == "" {
+			validationErrors = append(validationErrors, fmt.Errorf("rule must have policy-id or replacement: %s", rule))
+		}
+		if rule.PolicyID != "" && rule.Replacement != "" {
+			validationErrors = append(validationErrors, fmt.Errorf("rule cannot have both policy-id and replacement: %s", rule))
+		}
+		if rule.Platforms != nil {
+			for _, platform := range rule.Platforms {
+				if platform == "" {
+					validationErrors = append(validationErrors, fmt.Errorf("rule has empty platform: %s", rule))
+				}
+			}
+		}
+	}
+	for _, policy := range mappings.Policies {
+		if policy.ID == "" {
+			validationErrors = append(validationErrors, fmt.Errorf("policy missing id: %s", policy.ID))
+		}
+		if len(policy.Files) == 0 {
+			validationErrors = append(validationErrors, fmt.Errorf("policy missing files: %v", policy))
+		}
+		for _, file := range policy.Files {
+			if file.Path == "" {
+				validationErrors = append(validationErrors, fmt.Errorf("file missing path: %s", file))
+			}
+		}
+	}
+
+	if len(validationErrors) > 0 {
+		return errors.Join(validationErrors...)
+	}
+
+	return nil
+}
+
+func parsePolicyMappingsFile(data []byte) (*PolicyMappings, error) {
+	mappings := &policyMappingsFile{}
+	err := yaml.Unmarshal(data, mappings)
+	if err != nil {
+		return nil, fmt.Errorf("failed to unmarshal policy mapping file: %w", err)
+	}
+	err = validateMappingsFile(mappings)
+	if err != nil {
+		return nil, fmt.Errorf("invalid policy mapping file: %w", err)
+	}
+	return expandMappingFile(mappings)
+}
+
+func LoadLocalMappings(configDir string) (*PolicyMappings, error) {
+	if configDir == "" {
+		return nil, nil
+	}
+	path := filepath.Join(configDir, MappingFilename)
+	mappingFile, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read local policy mapping file %s: %w", path, err)
+	}
+	return parsePolicyMappingsFile(mappingFile)
+}
+
+func LoadTUFMappings(tufClient tuf.Downloader, localTargetsDir string) (*PolicyMappings, error) {
+	if tufClient == nil {
+		return nil, fmt.Errorf("tuf client not set")
+	}
+	filename := MappingFilename
+	file, err := tufClient.DownloadTarget(filename, filepath.Join(localTargetsDir, filename))
+	if err != nil {
+		return nil, fmt.Errorf("failed to download policy mapping file %s: %w", filename, err)
+	}
+	return parsePolicyMappingsFile(file.Data)
+}
+
+func expandMappingFile(mappingFile *policyMappingsFile) (*PolicyMappings, error) {
+	policies := make(map[string]*PolicyMapping)
+	for _, policy := range mappingFile.Policies {
+		policies[policy.ID] = policy
+	}
+
+	var rules []*PolicyRule
+	for _, rule := range mappingFile.Rules {
+		patternRegex, err := regexp.Compile(rule.Pattern)
+		if err != nil {
+			return nil, err
+		}
+		platforms := make([]*v1.Platform, 0, len(rule.Platforms))
+		for _, platform := range rule.Platforms {
+			parsedPlatform, err := v1.ParsePlatform(platform)
+			if err != nil {
+				return nil, fmt.Errorf("failed to parse platform %s: %w", platform, err)
+			}
+			platforms = append(platforms, parsedPlatform)
+		}
+
+		rules = append(rules, &PolicyRule{
+			Pattern:     patternRegex,
+			PolicyID:    rule.PolicyID,
+			Replacement: rule.Replacement,
+			Platforms:   platforms,
+		})
+	}
+
+	return &PolicyMappings{
+		Version:  mappingFile.Version,
+		Kind:     mappingFile.Kind,
+		Policies: policies,
+		Rules:    rules,
+	}, nil
+}

mapping/mapping_test.go

@@ -0,0 +1,82 @@
+package mapping
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func newMapping() *policyMappingsFile {
+	return &policyMappingsFile{
+		Version: "v1",
+		Kind:    "policy-mapping",
+		Policies: []*PolicyMapping{
+			{
+				ID: "docker-official-images",
+				Files: []PolicyMappingFile{
+					{
+						Path: "docker.io/library/alpine",
+					},
+				},
+			},
+		},
+		Rules: []*policyRuleFile{
+			{
+				Pattern:  "docker.io/library/alpine",
+				PolicyID: "docker-official-images",
+			},
+		},
+	}
+}
+
+func TestMappingsFileValidation(t *testing.T) {
+	mappings := newMapping()
+	err := validateMappingsFile(mappings)
+	require.NoError(t, err)
+
+	mappings = newMapping()
+	mappings.Kind = "not-policy-mapping"
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "file is not of kind policy-mapping: not-policy-mapping")
+
+	mappings = newMapping()
+	mappings.Version = "v2"
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "unsupported policy mapping file version: v2")
+
+	mappings = newMapping()
+	mappings.Rules[0].Pattern = ""
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "rule missing pattern")
+
+	mappings = newMapping()
+	mappings.Rules[0].PolicyID = ""
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "rule must have policy-id or replacement")
+
+	mappings = newMapping()
+	mappings.Rules[0].PolicyID = "docker-official-images"
+	mappings.Rules[0].Replacement = "docker.io/library/alpine"
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "rule cannot have both policy-id and replacement")
+
+	mappings = newMapping()
+	mappings.Policies[0].ID = ""
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "policy missing id")
+
+	mappings = newMapping()
+	mappings.Policies[0].Files = nil
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "policy missing files")
+
+	mappings = newMapping()
+	mappings.Policies[0].Files[0].Path = ""
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "file missing path")
+
+	// multiple errors
+	mappings.Policies[0].ID = ""
+	err = validateMappingsFile(mappings)
+	require.ErrorContains(t, err, "policy missing id: \nfile missing path: {}")
+}

mapping/match.go

@@ -0,0 +1,80 @@
+package mapping
+
+import (
+	"fmt"
+
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+)
+
+type matchType string
+
+const (
+	MatchTypePolicy        matchType = "policy"
+	MatchTypeMatchNoPolicy matchType = "match_no_policy"
+	MatchTypeNoMatch       matchType = "no_match"
+)
+
+type PolicyMatch struct {
+	MatchType   matchType
+	Policy      *PolicyMapping
+	Rule        *PolicyRule
+	MatchedName string
+}
+
+func (mappings *PolicyMappings) FindPolicyMatch(imageName string, platform *v1.Platform) (*PolicyMatch, error) {
+	if mappings == nil {
+		return &PolicyMatch{MatchType: MatchTypeNoMatch, MatchedName: imageName}, nil
+	}
+	return mappings.findPolicyMatchImpl(imageName, platform, make(map[*PolicyRule]bool))
+}
+
+func (mappings *PolicyMappings) findPolicyMatchImpl(imageName string, platform *v1.Platform, matched map[*PolicyRule]bool) (*PolicyMatch, error) {
+	for _, rule := range mappings.Rules {
+		if !rule.matchesPlatform(platform) {
+			continue
+		}
+		if rule.Pattern.MatchString(imageName) {
+			switch {
+			case rule.PolicyID == "" && rule.Replacement == "":
+				return nil, fmt.Errorf("rule %s has neither policy-id nor rewrite", rule.Pattern)
+			case rule.PolicyID != "" && rule.Replacement != "":
+				return nil, fmt.Errorf("rule %s has both policy-id and rewrite", rule.Pattern)
+			case rule.PolicyID != "":
+				policy := mappings.Policies[rule.PolicyID]
+				if policy != nil {
+					return &PolicyMatch{
+						MatchType:   MatchTypePolicy,
+						Policy:      policy,
+						Rule:        rule,
+						MatchedName: imageName,
+					}, nil
+				}
+				return &PolicyMatch{
+					MatchType:   MatchTypeMatchNoPolicy,
+					Rule:        rule,
+					MatchedName: imageName,
+				}, nil
+			case rule.Replacement != "":
+				if matched[rule] {
+					return nil, fmt.Errorf("rewrite loop detected")
+				}
+				matched[rule] = true
+				imageName = rule.Pattern.ReplaceAllString(imageName, rule.Replacement)
+				return mappings.findPolicyMatchImpl(imageName, platform, matched)
+			}
+		}
+	}
+	return &PolicyMatch{MatchType: MatchTypeNoMatch}, nil
+}
+
+func (rule *PolicyRule) matchesPlatform(platform *v1.Platform) bool {
+	if len(rule.Platforms) == 0 {
+		return true
+	}
+	for i := range rule.Platforms {
+		if rule.Platforms[i].Equals(*platform) {
+			return true
+		}
+	}
+	return false
+}

mapping/match_test.go

@@ -0,0 +1,200 @@
+package mapping
+
+import (
+	"path/filepath"
+	"testing"
+
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestFindPolicyMatch(t *testing.T) {
+	defaultPlatform, err := v1.ParsePlatform("linux/amd64")
+	require.NoError(t, err)
+	testCases := []struct {
+		name               string
+		imageName          string
+		mappingDir         string
+		expectError        bool
+		expectLoadingError bool
+		expectedMatchType  matchType
+		expectedPolicyID   string
+		expectedImageName  string
+		platform           string
+	}{
+		{
+			name:       "alpine",
+			mappingDir: "doi",
+			imageName:  "docker.io/library/alpine",
+
+			expectedMatchType: MatchTypePolicy,
+			expectedPolicyID:  "docker-official-images",
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:       "no match",
+			mappingDir: "doi",
+			imageName:  "docker.io/something/else",
+
+			expectedMatchType: MatchTypeNoMatch,
+		},
+		{
+			name:       "match, no policy",
+			mappingDir: "local",
+			imageName:  "docker.io/library/alpine",
+
+			expectedMatchType: MatchTypeMatchNoPolicy,
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:       "simple rewrite",
+			mappingDir: "simple-rewrite",
+			imageName:  "mycoolmirror.org/library/alpine",
+
+			expectedMatchType: MatchTypePolicy,
+			expectedPolicyID:  "docker-official-images",
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:       "rewrite no match",
+			mappingDir: "rewrite-to-no-match",
+			imageName:  "mycoolmirror.org/library/alpine",
+
+			expectedMatchType: MatchTypeNoMatch,
+		},
+		{
+			name:       "rewrite to match, no policy",
+			mappingDir: "rewrite-to-local",
+			imageName:  "mycoolmirror.org/library/alpine",
+
+			expectedMatchType: MatchTypeMatchNoPolicy,
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:       "multiple rewrites",
+			mappingDir: "rewrite-multiple",
+			imageName:  "myevencoolermirror.org/library/alpine",
+
+			expectedMatchType: MatchTypePolicy,
+			expectedPolicyID:  "docker-official-images",
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:       "rewrite loop",
+			mappingDir: "rewrite-loop",
+			imageName:  "yin/alpine",
+
+			expectError: true,
+		},
+		{
+			name:              "alpine with platform",
+			mappingDir:        "doi",
+			imageName:         "docker.io/library/alpine",
+			platform:          "linux/amd64",
+			expectedMatchType: MatchTypePolicy,
+			expectedPolicyID:  "docker-official-images",
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:              "alpine with platform",
+			mappingDir:        "doi-platform",
+			imageName:         "docker.io/library/alpine",
+			platform:          "linux/amd64",
+			expectedMatchType: MatchTypePolicy,
+			expectedPolicyID:  "docker-official-images",
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:              "alpine with no matching platform",
+			mappingDir:        "doi-platform",
+			imageName:         "docker.io/library/alpine",
+			platform:          "linux/arm64",
+			expectedMatchType: MatchTypeNoMatch,
+			expectedPolicyID:  "docker-official-images",
+		},
+		{
+			name:              "alpine with platform",
+			mappingDir:        "doi-platform",
+			imageName:         "docker.io/library/alpine",
+			platform:          "linux/amd64",
+			expectedMatchType: MatchTypePolicy,
+			expectedPolicyID:  "docker-official-images",
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:               "alpine with invalid platform in mapping",
+			mappingDir:         "doi-platform-broken",
+			imageName:          "docker.io/library/alpine",
+			platform:           "linux/amd64",
+			expectLoadingError: true,
+		},
+		{
+			name:              "firefox with > 1 platforms in policy",
+			mappingDir:        "doi-platform",
+			imageName:         "docker.io/mozilla/firefox",
+			platform:          "linux/arm64",
+			expectedMatchType: MatchTypePolicy,
+			expectedPolicyID:  "docker-official-images",
+			expectedImageName: "docker.io/mozilla/firefox",
+		},
+		{
+			name:              "firefox with > 1 platforms in policy (no match)",
+			mappingDir:        "doi-platform",
+			imageName:         "docker.io/mozilla/firefox",
+			platform:          "macOs/arm64",
+			expectedMatchType: MatchTypeNoMatch,
+			expectedPolicyID:  "docker-official-images",
+		},
+		{
+			name:              "rewrite and platform",
+			mappingDir:        "doi-platform",
+			imageName:         "mycoolmirror.org/library/alpine",
+			platform:          "linux/amd64",
+			expectedMatchType: MatchTypePolicy,
+			expectedPolicyID:  "docker-official-images",
+			expectedImageName: "docker.io/library/alpine",
+		},
+		{
+			name:              "rewrite and platform mismatch",
+			mappingDir:        "doi-platform",
+			imageName:         "mycoolmirror.org/library/alpine",
+			platform:          "macOs/amd64",
+			expectedMatchType: MatchTypeNoMatch,
+			expectedPolicyID:  "docker-official-images",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			mappings, err := LoadLocalMappings(filepath.Join("testdata", "mappings", tc.mappingDir))
+			if tc.expectLoadingError {
+				require.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+
+			platform := defaultPlatform
+			if tc.platform != "" {
+				platform, err = v1.ParsePlatform(tc.platform)
+				require.NoError(t, err)
+			}
+			match, err := mappings.FindPolicyMatch(tc.imageName, platform)
+			if tc.expectError {
+				require.Error(t, err)
+				// TODO: check error matches expected error message
+				return
+			}
+			require.NoError(t, err)
+			assert.Equal(t, tc.expectedMatchType, match.MatchType)
+			if match.MatchType == MatchTypePolicy {
+				if assert.NotNil(t, match.Policy) {
+					assert.Equal(t, tc.expectedPolicyID, match.Policy.ID)
+				}
+			}
+			if match.MatchType == MatchTypeMatchNoPolicy || match.MatchType == MatchTypePolicy {
+				assert.Equal(t, tc.expectedImageName, match.MatchedName)
+			}
+		})
+	}
+}

mapping/testdata/mappings/doi-platform-broken/mapping.yaml

@@ -0,0 +1,11 @@
+version: v1
+kind: policy-mapping
+policies:
+  - id: docker-official-images
+    description: Docker Official Images
+    files:
+      - path: doi/policy.rego
+rules:
+  - pattern: "^docker[.]io/library/(.*)$"
+    platforms: ["linux/amd64/broken/platform/spec/1.0:foobar"]
+    policy-id: docker-official-images

mapping/testdata/mappings/doi-platform/mapping.yaml

@@ -0,0 +1,17 @@
+version: v1
+kind: policy-mapping
+policies:
+  - id: docker-official-images
+    description: Docker Official Images
+    files:
+      - path: doi/policy.rego
+rules:
+  - pattern: "^docker[.]io/library/(.*)$"
+    platforms: ["linux/amd64"]
+    policy-id: docker-official-images
+  - pattern: "^docker.io/mozilla/(.*)$"
+    platforms: ["linux/amd64", "linux/arm64"]
+    policy-id: docker-official-images
+  - pattern: "^mycoolmirror[.]org/library/(.*)$"
+    platforms: ["linux/amd64"]
+    rewrite: "docker.io/library/$1"

mapping/types.go

@@ -1,7 +1,9 @@
-package config
+package mapping
 
 import (
 	"regexp"
+
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 )
 
 type policyMappingsFile struct {
@@ -12,9 +14,10 @@ type policyMappingsFile struct {
 }
 
 type policyRuleFile struct {
-	Pattern     string `json:"pattern"`
-	PolicyID    string `json:"policy-id"`
-	Replacement string `json:"rewrite"`
+	Pattern     string   `json:"pattern"`
+	Platforms   []string `json:"platforms"`
+	PolicyID    string   `json:"policy-id"`
+	Replacement string   `json:"rewrite"`
 }
 
 type PolicyMappings struct {
@@ -51,4 +54,5 @@ type PolicyRule struct {
 	Pattern     *regexp.Regexp
 	PolicyID    string
 	Replacement string
+	Platforms   []*v1.Platform
 }

mirror/example_mirror_test.go

@@ -1,14 +1,15 @@
 package mirror_test
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
 
-	"github.com/docker/attest/pkg/mirror"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/tuf"
+	"github.com/docker/attest/mirror"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/tuf"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 )
 
@@ -29,7 +30,8 @@ func ExampleNewTUFMirror() {
 	// configure TUF mirror
 	metadataURI := "https://docker.github.io/tuf-staging/metadata"
 	targetsURI := "https://docker.github.io/tuf-staging/targets"
-	m, err := mirror.NewTUFMirror(tuf.DockerTUFRootStaging.Data, tufOutputPath, metadataURI, targetsURI, tuf.NewMockVersionChecker())
+	ctx := context.Background()
+	m, err := mirror.NewTUFMirror(ctx, tuf.DockerTUFRootStaging.Data, tufOutputPath, metadataURI, targetsURI, tuf.NewMockVersionChecker())
 	if err != nil {
 		panic(err)
 	}
@@ -64,7 +66,7 @@ func ExampleNewTUFMirror() {
 	}
 
 	// push metadata and targets to registry (optional)
-	err = mirrorToRegistry(mirrorOutput)
+	err = mirrorToRegistry(ctx, mirrorOutput)
 	if err != nil {
 		panic(err)
 	}
@@ -77,10 +79,10 @@ func ExampleNewTUFMirror() {
 	}
 }
 
-func mirrorToRegistry(o *TufMirrorOutput) error {
+func mirrorToRegistry(ctx context.Context, o *TufMirrorOutput) error {
 	// push metadata to registry
 	metadataRepo := "registry-1.docker.io/docker/tuf-metadata:latest"
-	err := oci.PushImageToRegistry(o.metadata, metadataRepo)
+	err := oci.PushImageToRegistry(ctx, o.metadata, metadataRepo)
 	if err != nil {
 		return err
 	}
@@ -91,7 +93,7 @@ func mirrorToRegistry(o *TufMirrorOutput) error {
 			return fmt.Errorf("failed to get repo without tag: %s", metadataRepo)
 		}
 		imageName := fmt.Sprintf("%s:%s", repo, metadata.Tag)
-		err = oci.PushImageToRegistry(metadata.Image, imageName)
+		err = oci.PushImageToRegistry(ctx, metadata.Image, imageName)
 		if err != nil {
 			return err
 		}
@@ -101,7 +103,7 @@ func mirrorToRegistry(o *TufMirrorOutput) error {
 	targetsRepo := "registry-1.docker.io/docker/tuf-targets"
 	for _, target := range o.targets {
 		imageName := fmt.Sprintf("%s:%s", targetsRepo, target.Tag)
-		err = oci.PushImageToRegistry(target.Image, imageName)
+		err = oci.PushImageToRegistry(ctx, target.Image, imageName)
 		if err != nil {
 			return err
 		}
@@ -109,7 +111,7 @@ func mirrorToRegistry(o *TufMirrorOutput) error {
 	// push delegated targets to registry
 	for _, target := range o.delegatedTargets {
 		imageName := fmt.Sprintf("%s:%s", targetsRepo, target.Tag)
-		err = oci.PushIndexToRegistry(target.Index, imageName)
+		err = oci.PushIndexToRegistry(ctx, target.Index, imageName)
 		if err != nil {
 			return err
 		}

mirror/metadata.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"strconv"
 
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/empty"
 	"github.com/google/go-containerregistry/pkg/v1/mutate"

mirror/metadata_test.go

@@ -1,6 +1,7 @@
 package mirror
 
 import (
+	"context"
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
@@ -10,7 +11,7 @@ import (
 	"testing"
 
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/tuf"
+	"github.com/docker/attest/tuf"
 	"github.com/stretchr/testify/assert"
 	"github.com/theupdateframework/go-tuf/v2/metadata"
 )
@@ -21,11 +22,11 @@ const (
 )
 
 func TestGetTufMetadataMirror(t *testing.T) {
-	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "..", "test", "testdata", "tuf", "test-repo"))))
+	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "test", "testdata", "tuf", "test-repo"))))
 	defer server.Close()
 
 	path := test.CreateTempDir(t, "", "tuf_temp")
-	m, err := NewTUFMirror(tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
+	m, err := NewTUFMirror(context.Background(), tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
 	assert.NoError(t, err)
 
 	tufMetadata, err := m.getMetadataMirror(server.URL + metadataPath)
@@ -39,11 +40,11 @@ func TestGetTufMetadataMirror(t *testing.T) {
 }
 
 func TestGetMetadataManifest(t *testing.T) {
-	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "..", "test", "testdata", "tuf", "test-repo"))))
+	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "test", "testdata", "tuf", "test-repo"))))
 	defer server.Close()
 
 	path := test.CreateTempDir(t, "", "tuf_temp")
-	m, err := NewTUFMirror(tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
+	m, err := NewTUFMirror(context.Background(), tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
 	assert.NoError(t, err)
 
 	img, err := m.GetMetadataManifest(server.URL + metadataPath)
@@ -78,11 +79,11 @@ func TestGetMetadataManifest(t *testing.T) {
 }
 
 func TestGetDelegatedMetadataMirrors(t *testing.T) {
-	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "..", "test", "testdata", "tuf", "test-repo"))))
+	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "test", "testdata", "tuf", "test-repo"))))
 	defer server.Close()
 
 	path := test.CreateTempDir(t, "", "tuf_temp")
-	m, err := NewTUFMirror(tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
+	m, err := NewTUFMirror(context.Background(), tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
 	assert.NoError(t, err)
 
 	delegations, err := m.GetDelegatedMetadataMirrors()

mirror/mirror.go

@@ -0,0 +1,19 @@
+package mirror
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/docker/attest/tuf"
+)
+
+func NewTUFMirror(ctx context.Context, root []byte, tufPath, metadataURL, targetsURL string, versionChecker tuf.VersionChecker) (*TUFMirror, error) {
+	if root == nil {
+		root = tuf.DockerTUFRootDefault.Data
+	}
+	tufClient, err := tuf.NewClient(ctx, &tuf.ClientOptions{InitialRoot: root, LocalStorageDir: tufPath, MetadataSource: metadataURL, TargetsSource: targetsURL, VersionChecker: versionChecker})
+	if err != nil {
+		return nil, fmt.Errorf("failed to create TUF client: %w", err)
+	}
+	return &TUFMirror{TUFClient: tufClient, tufPath: tufPath, metadataURL: metadataURL, targetsURL: targetsURL}, nil
+}

mirror/targets.go

@@ -5,7 +5,7 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/empty"
 	"github.com/google/go-containerregistry/pkg/v1/mutate"

mirror/targets_test.go

@@ -1,6 +1,7 @@
 package mirror
 
 import (
+	"context"
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
@@ -9,7 +10,7 @@ import (
 	"testing"
 
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/tuf"
+	"github.com/docker/attest/tuf"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -22,11 +23,11 @@ type Layers struct {
 }
 
 func TestGetTufTargetsMirror(t *testing.T) {
-	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "..", "test", "testdata", "tuf", "test-repo"))))
+	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "test", "testdata", "tuf", "test-repo"))))
 	defer server.Close()
 
 	path := test.CreateTempDir(t, "", "tuf_temp")
-	m, err := NewTUFMirror(tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
+	m, err := NewTUFMirror(context.Background(), tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
 	assert.NoError(t, err)
 
 	targets, err := m.GetTUFTargetMirrors()
@@ -56,11 +57,11 @@ func TestGetTufTargetsMirror(t *testing.T) {
 }
 
 func TestTargetDelegationMetadata(t *testing.T) {
-	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "..", "test", "testdata", "tuf", "test-repo"))))
+	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "test", "testdata", "tuf", "test-repo"))))
 	defer server.Close()
 
 	path := test.CreateTempDir(t, "", "tuf_temp")
-	tm, err := NewTUFMirror(tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
+	tm, err := NewTUFMirror(context.Background(), tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
 	assert.NoError(t, err)
 
 	targets, err := tm.TUFClient.LoadDelegatedTargets("test-role", "targets")
@@ -69,11 +70,11 @@ func TestTargetDelegationMetadata(t *testing.T) {
 }
 
 func TestGetDelegatedTargetMirrors(t *testing.T) {
-	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "..", "test", "testdata", "tuf", "test-repo"))))
+	server := httptest.NewServer(http.FileServer(http.Dir(filepath.Join("..", "test", "testdata", "tuf", "test-repo"))))
 	defer server.Close()
 
 	path := test.CreateTempDir(t, "", "tuf_temp")
-	m, err := NewTUFMirror(tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
+	m, err := NewTUFMirror(context.Background(), tuf.DockerTUFRootDev.Data, path, server.URL+metadataPath, server.URL+targetsPath, tuf.NewMockVersionChecker())
 	assert.NoError(t, err)
 
 	mirrors, err := m.GetDelegatedTargetMirrors()

mirror/types.go

@@ -1,8 +1,8 @@
 package mirror
 
 import (
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/tuf"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/tuf"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/theupdateframework/go-tuf/v2/metadata"
 )

oci/authn.go

@@ -1,6 +1,8 @@
 package oci
 
 import (
+	"io"
+
 	ecr "github.com/awslabs/amazon-ecr-credential-helper/ecr-login"
 	"github.com/google/go-containerregistry/pkg/authn"
 	"github.com/google/go-containerregistry/pkg/v1/google"
@@ -16,6 +18,6 @@ func MultiKeychainAll() authn.Keychain {
 	return authn.NewMultiKeychain(
 		authn.DefaultKeychain,
 		google.Keychain,
-		authn.NewKeychainFromHelper(ecr.NewECRHelper()),
+		authn.NewKeychainFromHelper(ecr.NewECRHelper(ecr.WithLogger(io.Discard))),
 	)
 }

oci/authn_test.go

@@ -3,15 +3,16 @@
 package oci_test
 
 import (
+	"context"
 	"testing"
 
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 	"github.com/stretchr/testify/require"
 )
 
 func TestRegistryAuth(t *testing.T) {
-	attIdx, err := oci.IndexFromPath(test.UnsignedTestImage)
+	attIdx, err := oci.IndexFromPath(test.UnsignedTestIndex(".."))
 	require.NoError(t, err)
 	// test cases for ecr, gcr and dockerhub
 	testCases := []struct {
@@ -20,11 +21,12 @@ func TestRegistryAuth(t *testing.T) {
 		{Image: "175142243308.dkr.ecr.us-east-1.amazonaws.com/e2e-test-image:latest"},
 		{Image: "docker/image-signer-verifier-test:latest"},
 	}
+	ctx := context.Background()
 	for _, tc := range testCases {
 		t.Run(tc.Image, func(t *testing.T) {
-			err := oci.PushIndexToRegistry(attIdx.Index, tc.Image)
+			err := oci.PushIndexToRegistry(ctx, attIdx.Index, tc.Image)
 			require.NoError(t, err)
-			_, err = oci.IndexFromRemote(tc.Image)
+			_, err = oci.IndexFromRemote(ctx, tc.Image)
 			require.NoError(t, err)
 		})
 	}

oci/oci.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/containerd/platforms"
 	"github.com/distribution/reference"
+	"github.com/docker/attest/useragent"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/remote"
 	"github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/common"
@@ -33,7 +34,11 @@ func ParsePlatform(platformStr string) (*v1.Platform, error) {
 
 func WithOptions(ctx context.Context, platform *v1.Platform) []remote.Option {
 	// prepare options
-	options := []remote.Option{MultiKeychainOption(), remote.WithTransport(HTTPTransport()), remote.WithContext(ctx)}
+	options := []remote.Option{
+		MultiKeychainOption(),
+		remote.WithContext(ctx),
+		remote.WithUserAgent(useragent.Get(ctx)),
+	}
 
 	// add in platform into remote Get operation; this might conflict with an explicit digest, but we are trying anyway
 	if platform != nil {
@@ -87,7 +92,7 @@ func RefToPURL(named reference.Named, platform *v1.Platform) (string, bool, erro
 		})
 	}
 
-	p := packageurl.NewPackageURL("docker", ns, name, version, qualifiers, "")
+	p := packageurl.NewPackageURL(packageurl.TypeDocker, ns, name, version, qualifiers, "")
 	return p.ToString(), isCanonical, nil
 }
 

oci/oci_test.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/distribution/reference"
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/layout"
 	"github.com/stretchr/testify/assert"
@@ -67,7 +67,7 @@ func TestRefToPurl(t *testing.T) {
 
 // Test fix for https://github.com/docker/secure-artifacts-team-issues/issues/202
 func TestImageDigestForPlatform(t *testing.T) {
-	idx, err := layout.ImageIndexFromPath(test.UnsignedTestImage)
+	idx, err := layout.ImageIndexFromPath(test.UnsignedTestIndex(".."))
 	assert.NoError(t, err)
 
 	idxm, err := idx.IndexManifest()
@@ -86,14 +86,14 @@ func TestImageDigestForPlatform(t *testing.T) {
 	desc, err := oci.ImageDescriptor(mfs2, p)
 	assert.NoError(t, err)
 	digest := desc.Digest.String()
-	assert.Equal(t, "sha256:da8b190665956ea07890a0273e2a9c96bfe291662f08e2860e868eef69c34620", digest)
+	assert.Equal(t, test.UnsignedLinuxAMD64ImageDigest, digest)
 
 	p, err = oci.ParsePlatform("linux/arm64")
 	assert.NoError(t, err)
 	desc, err = oci.ImageDescriptor(mfs2, p)
 	assert.NoError(t, err)
 	digest = desc.Digest.String()
-	assert.Equal(t, "sha256:7a76cec943853f9f7105b1976afa1bf7cd5bb6afc4e9d5852dd8da7cf81ae86e", digest)
+	assert.Equal(t, test.UnsignedLinuxArm64ImageDigest, digest)
 }
 
 func TestWithoutTag(t *testing.T) {

oci/output.go

@@ -1,6 +1,7 @@
 package oci
 
 import (
+	"context"
 	"fmt"
 	"os"
 
@@ -13,18 +14,18 @@ import (
 )
 
 // PushImageToRegistry pushes an image to the registry with the specified name.
-func PushImageToRegistry(image v1.Image, imageName string) error {
+func PushImageToRegistry(ctx context.Context, image v1.Image, imageName string) error {
 	ref, err := name.ParseReference(imageName)
 	if err != nil {
 		return fmt.Errorf("Failed to parse image name '%s': %w", imageName, err)
 	}
 
 	// Push the image to the registry
-	return remote.Write(ref, image, MultiKeychainOption())
+	return remote.Write(ref, image, WithOptions(ctx, nil)...)
 }
 
 // PushIndexToRegistry pushes an index to the registry with the specified name.
-func PushIndexToRegistry(index v1.ImageIndex, imageName string) error {
+func PushIndexToRegistry(ctx context.Context, index v1.ImageIndex, imageName string) error {
 	// Parse the index name
 	ref, err := name.ParseReference(imageName)
 	if err != nil {
@@ -32,7 +33,7 @@ func PushIndexToRegistry(index v1.ImageIndex, imageName string) error {
 	}
 
 	// Push the index to the registry
-	return remote.WriteIndex(ref, index, MultiKeychainOption())
+	return remote.WriteIndex(ref, index, WithOptions(ctx, nil)...)
 }
 
 // SaveIndexAsOCILayout saves an image as an OCI layout to the specified path.
@@ -66,7 +67,7 @@ func SaveIndexAsOCILayout(image v1.ImageIndex, path string) error {
 }
 
 // SaveIndex saves an index to the specified outputs.
-func SaveIndex(outputs []*ImageSpec, index v1.ImageIndex, indexName string) error {
+func SaveIndex(ctx context.Context, outputs []*ImageSpec, index v1.ImageIndex, indexName string) error {
 	// split output by comma and write or push each one
 	for _, output := range outputs {
 		if output.Type == OCI {
@@ -84,7 +85,7 @@ func SaveIndex(outputs []*ImageSpec, index v1.ImageIndex, indexName string) erro
 				return fmt.Errorf("failed to write signed image: %w", err)
 			}
 		} else {
-			err := PushIndexToRegistry(index, output.Identifier)
+			err := PushIndexToRegistry(ctx, index, output.Identifier)
 			if err != nil {
 				return fmt.Errorf("failed to push signed image: %w", err)
 			}
@@ -94,7 +95,7 @@ func SaveIndex(outputs []*ImageSpec, index v1.ImageIndex, indexName string) erro
 }
 
 // SaveImage saves an image to the specified output.
-func SaveImage(output *ImageSpec, image v1.Image, imageName string) error {
+func SaveImage(ctx context.Context, output *ImageSpec, image v1.Image, imageName string) error {
 	if output.Type == OCI {
 		idx := v1.ImageIndex(empty.Index)
 		idx = mutate.AppendManifests(idx, mutate.IndexAddendum{
@@ -110,7 +111,7 @@ func SaveImage(output *ImageSpec, image v1.Image, imageName string) error {
 			return fmt.Errorf("failed to write signed image: %w", err)
 		}
 	} else {
-		err := PushImageToRegistry(image, output.Identifier)
+		err := PushImageToRegistry(ctx, image, output.Identifier)
 		if err != nil {
 			return fmt.Errorf("failed to push signed image: %w", err)
 		}
@@ -119,7 +120,7 @@ func SaveImage(output *ImageSpec, image v1.Image, imageName string) error {
 }
 
 // SaveImagesNoTag saves a list of images by digest to the specified outputs.
-func SaveImagesNoTag(images []v1.Image, outputs []*ImageSpec) error {
+func SaveImagesNoTag(ctx context.Context, images []v1.Image, outputs []*ImageSpec) error {
 	for _, output := range outputs {
 		// OCI layout output not supported
 		if output.Type == OCI {
@@ -134,7 +135,7 @@ func SaveImagesNoTag(images []v1.Image, outputs []*ImageSpec) error {
 			if err != nil {
 				return fmt.Errorf("failed to create image spec: %w", err)
 			}
-			err = PushImageToRegistry(image, spec.Identifier)
+			err = PushImageToRegistry(ctx, image, spec.Identifier)
 			if err != nil {
 				return fmt.Errorf("failed to push image: %w", err)
 			}

oci/output_test.go

@@ -1,14 +1,14 @@
 package oci_test
 
 import (
+	"context"
 	"fmt"
-	"net/http/httptest"
 	"net/url"
 	"testing"
 
+	"github.com/docker/attest/attestation"
 	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/oci"
+	"github.com/docker/attest/oci"
 	"github.com/google/go-containerregistry/pkg/registry"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/empty"
@@ -18,24 +18,25 @@ import (
 
 func TestSavingIndex(t *testing.T) {
 	outputLayout := test.CreateTempDir(t, "", "mirror-test")
-	attIdx, err := oci.IndexFromPath(test.UnsignedTestImage)
+	attIdx, err := oci.IndexFromPath(test.UnsignedTestIndex(".."))
 	require.NoError(t, err)
 
-	server := httptest.NewServer(registry.New())
-	defer server.Close()
+	ctx := context.Background()
+	regServer := test.NewLocalRegistry(ctx)
+	defer regServer.Close()
 
-	u, err := url.Parse(server.URL)
+	u, err := url.Parse(regServer.URL)
 	require.NoError(t, err)
 
 	indexName := fmt.Sprintf("%s/repo:root", u.Host)
 	output, err := oci.ParseImageSpecs(indexName)
 	require.NoError(t, err)
-	err = oci.SaveIndex(output, attIdx.Index, indexName)
+	err = oci.SaveIndex(ctx, output, attIdx.Index, indexName)
 	require.NoError(t, err)
 
 	ociOutput, err := oci.ParseImageSpecs(oci.LocalPrefix + outputLayout)
 	require.NoError(t, err)
-	err = oci.SaveIndex(ociOutput, attIdx.Index, indexName)
+	err = oci.SaveIndex(ctx, ociOutput, attIdx.Index, indexName)
 	require.NoError(t, err)
 }
 
@@ -44,21 +45,22 @@ func TestSavingImage(t *testing.T) {
 
 	img := empty.Image
 
-	server := httptest.NewServer(registry.New())
-	defer server.Close()
+	ctx := context.Background()
+	regServer := test.NewLocalRegistry(ctx)
+	defer regServer.Close()
 
-	u, err := url.Parse(server.URL)
+	u, err := url.Parse(regServer.URL)
 	require.NoError(t, err)
 
 	indexName := fmt.Sprintf("%s/repo:root", u.Host)
 	output, err := oci.ParseImageSpec(indexName)
 	require.NoError(t, err)
-	err = oci.SaveImage(output, img, indexName)
+	err = oci.SaveImage(ctx, output, img, indexName)
 	require.NoError(t, err)
 
 	ociOutput, err := oci.ParseImageSpec(oci.LocalPrefix + outputLayout)
 	require.NoError(t, err)
-	err = oci.SaveImage(ociOutput, img, indexName)
+	err = oci.SaveImage(ctx, ociOutput, img, indexName)
 	require.NoError(t, err)
 }
 
@@ -71,7 +73,7 @@ func TestSavingReferrers(t *testing.T) {
 		},
 	}
 
-	digest, err := v1.NewHash("sha256:da8b190665956ea07890a0273e2a9c96bfe291662f08e2860e868eef69c34620")
+	digest, err := v1.NewHash(test.UnsignedLinuxAMD64ImageDigest)
 	require.NoError(t, err)
 	subject := &v1.Descriptor{
 		MediaType: "application/vnd.oci.image.manifest.v1+json",
@@ -81,10 +83,10 @@ func TestSavingReferrers(t *testing.T) {
 	require.NoError(t, err)
 	err = manifest.Add(ctx, signer, statement, opts)
 	require.NoError(t, err)
-	server := httptest.NewServer(registry.New(registry.WithReferrersSupport(true)))
-	defer server.Close()
+	regServer := test.NewLocalRegistry(ctx, registry.WithReferrersSupport(true))
+	defer regServer.Close()
 
-	u, err := url.Parse(server.URL)
+	u, err := url.Parse(regServer.URL)
 	require.NoError(t, err)
 
 	indexName := fmt.Sprintf("%s/repo:root", u.Host)
@@ -92,7 +94,7 @@ func TestSavingReferrers(t *testing.T) {
 	require.NoError(t, err)
 	artifacts, err := manifest.BuildReferringArtifacts()
 	require.NoError(t, err)
-	err = oci.SaveImagesNoTag(artifacts, output)
+	err = oci.SaveImagesNoTag(ctx, artifacts, output)
 	require.NoError(t, err)
 
 	reg := &attestation.MockRegistryResolver{

oci/registry.go

@@ -9,6 +9,9 @@ import (
 	"github.com/google/go-containerregistry/pkg/v1/remote"
 )
 
+// ensure RegistryImageDetailsResolver implements ImageDetailsResolver.
+var _ ImageDetailsResolver = &RegistryImageDetailsResolver{}
+
 type RegistryImageDetailsResolver struct {
 	*ImageSpec
 	descriptor *v1.Descriptor

oci/types.go

@@ -2,6 +2,7 @@ package oci
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"fmt"
 	"strings"
@@ -61,14 +62,14 @@ func IndexFromPath(path string) (*NamedIndex, error) {
 	}, nil
 }
 
-func IndexFromRemote(image string) (*NamedIndex, error) {
+func IndexFromRemote(ctx context.Context, image string) (*NamedIndex, error) {
 	ref, err := name.ParseReference(image)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse image reference %s: %w", image, err)
 	}
 
 	// Pull the image from the registry
-	idx, err := remote.Index(ref, MultiKeychainOption())
+	idx, err := remote.Index(ref, WithOptions(ctx, nil)...)
 	if err != nil {
 		return nil, fmt.Errorf("failed to pull image %s: %w", image, err)
 	}
@@ -78,11 +79,11 @@ func IndexFromRemote(image string) (*NamedIndex, error) {
 	}, nil
 }
 
-func LoadIndex(input *ImageSpec) (*NamedIndex, error) {
+func LoadIndex(ctx context.Context, input *ImageSpec) (*NamedIndex, error) {
 	if input.Type == OCI {
 		return IndexFromPath(input.Identifier)
 	}
-	return IndexFromRemote(input.Identifier)
+	return IndexFromRemote(ctx, input.Identifier)
 }
 
 func (i *ImageSpec) ForPlatforms(platform string) ([]*ImageSpec, error) {

pkg/attest/README.md

@@ -1,2 +0,0 @@
-## attest
-This package implements the top-level signing and verification methods.

pkg/attestation/layout_test.go

@@ -1,68 +0,0 @@
-package attestation_test
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/attest"
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/policy"
-	v1 "github.com/google/go-containerregistry/pkg/v1"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func TestAttestationFromOCILayout(t *testing.T) {
-	ctx, signer := test.Setup(t)
-	outputLayout := test.CreateTempDir(t, "", "attest-oci-layout")
-
-	invalidPlatform := &v1.Platform{
-		Architecture: "invalid",
-		OS:           "invalid",
-	}
-
-	opts := &attestation.SigningOptions{}
-	attIdx, err := oci.IndexFromPath(test.UnsignedTestImage)
-	require.NoError(t, err)
-	signedManifests, err := attest.SignStatements(ctx, attIdx.Index, signer, opts)
-	require.NoError(t, err)
-	signedIndex := attIdx.Index
-	signedIndex, err = attestation.UpdateIndexImages(signedIndex, signedManifests)
-	require.NoError(t, err)
-	spec, err := oci.ParseImageSpec(oci.LocalPrefix + outputLayout)
-	require.NoError(t, err)
-	err = oci.SaveIndex([]*oci.ImageSpec{spec}, signedIndex, outputLayout)
-	require.NoError(t, err)
-
-	testCases := []struct {
-		name     string
-		platform *v1.Platform
-		errorStr string
-	}{
-		{name: "nominal", platform: spec.Platform},
-		{name: "invalid platform", platform: invalidPlatform, errorStr: "platform not found in index"},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			spec := &oci.ImageSpec{
-				Type:       oci.OCI,
-				Identifier: outputLayout,
-				Platform:   tc.platform,
-			}
-			resolver, err := policy.CreateImageDetailsResolver(spec)
-			if tc.errorStr != "" {
-				require.Error(t, err)
-				assert.Contains(t, err.Error(), tc.errorStr)
-				return
-			}
-			require.NoError(t, err)
-			desc, err := resolver.ImageDescriptor(ctx)
-			require.NoError(t, err)
-			digest := desc.Digest.String()
-			assert.True(t, strings.Contains(digest, "sha256:"))
-		})
-	}
-}

pkg/attestation/verify.go

@@ -1,138 +0,0 @@
-package attestation
-
-import (
-	"context"
-	"crypto/ecdsa"
-	"crypto/x509"
-	"encoding/base64"
-	"encoding/json"
-	"fmt"
-	"time"
-
-	"github.com/docker/attest/internal/util"
-	"github.com/docker/attest/pkg/signerverifier"
-	"github.com/docker/attest/pkg/tlog"
-	intoto "github.com/in-toto/in-toto-golang/in_toto"
-	ociv1 "github.com/opencontainers/image-spec/specs-go/v1"
-	"github.com/secure-systems-lab/go-securesystemslib/dsse"
-)
-
-type KeyMetadata struct {
-	ID            string     `json:"id"`
-	PEM           string     `json:"key"`
-	From          time.Time  `json:"from"`
-	To            *time.Time `json:"to"`
-	Status        string     `json:"status"`
-	SigningFormat string     `json:"signing-format"`
-	Distrust      bool       `json:"distrust,omitempty"`
-}
-
-type (
-	Keys    []*KeyMetadata
-	KeysMap map[string]*KeyMetadata
-)
-
-func VerifyDSSE(ctx context.Context, env *Envelope, opts *VerifyOptions) ([]byte, error) {
-	// enforce payload type
-	if !ValidPayloadType(env.PayloadType) {
-		return nil, fmt.Errorf("unsupported payload type %s", env.PayloadType)
-	}
-
-	if len(env.Signatures) == 0 {
-		return nil, fmt.Errorf("no signatures found")
-	}
-
-	payload, err := base64Encoding.DecodeString(env.Payload)
-	if err != nil {
-		return nil, fmt.Errorf("error failed to decode payload: %w", err)
-	}
-
-	encPayload := dsse.PAE(env.PayloadType, payload)
-
-	// verify signatures and transparency log entry
-	for _, sig := range env.Signatures {
-		err := verifySignature(ctx, sig, encPayload, opts)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	return payload, nil
-}
-
-func verifySignature(ctx context.Context, sig *Signature, payload []byte, opts *VerifyOptions) error {
-	keys := make(map[string]*KeyMetadata, len(opts.Keys))
-	for _, key := range opts.Keys {
-		keys[key.ID] = key
-	}
-	keyMeta, ok := keys[sig.KeyID]
-	if !ok {
-		return fmt.Errorf("error key not found: %s", sig.KeyID)
-	}
-
-	if keyMeta.Distrust {
-		return fmt.Errorf("key %s is distrusted", keyMeta.ID)
-	}
-	// TODO: this is unmarshalling with MarshalPKIXPublicKey only for us to marshal it again
-	publicKey, err := signerverifier.ParsePublicKey([]byte(keyMeta.PEM))
-	if err != nil {
-		return fmt.Errorf("failed to parse public key: %w", err)
-	}
-
-	if !opts.SkipTL {
-		t := tlog.GetTL(ctx)
-		if sig.Extension == nil || sig.Extension.Kind == "" {
-			return fmt.Errorf("error missing signature extension")
-		}
-		if sig.Extension.Kind != DockerDSSEExtKind {
-			return fmt.Errorf("error unsupported signature extension kind: %s", sig.Extension.Kind)
-		}
-
-		// verify TL entry
-		if sig.Extension.Ext.TL.Kind != RekorTLExtKind {
-			return fmt.Errorf("error unsupported TL extension kind: %s", sig.Extension.Ext.TL.Kind)
-		}
-		entry := sig.Extension.Ext.TL.Data
-		entryBytes, err := json.Marshal(entry)
-		if err != nil {
-			return fmt.Errorf("failed to marshal TL entry: %w", err)
-		}
-
-		integratedTime, err := t.VerifyLogEntry(ctx, entryBytes)
-		if err != nil {
-			return fmt.Errorf("TL entry failed verification: %w", err)
-		}
-		if integratedTime.Before(keyMeta.From) {
-			return fmt.Errorf("key %s was not yet valid at TL log time %s (key valid from %s)", keyMeta.ID, integratedTime, keyMeta.From)
-		}
-		if keyMeta.To != nil && !integratedTime.Before(*keyMeta.To) {
-			return fmt.Errorf("key %s was already %s at TL log time %s (key %s at %s)", keyMeta.ID, keyMeta.Status, integratedTime, keyMeta.Status, *keyMeta.To)
-		}
-		// verify TL entry payload
-		encodedPub, err := x509.MarshalPKIXPublicKey(publicKey)
-		if err != nil {
-			return fmt.Errorf("error failed to marshal public key: %w", err)
-		}
-		err = t.VerifyEntryPayload(entryBytes, payload, encodedPub)
-		if err != nil {
-			return fmt.Errorf("TL entry failed payload verification: %w", err)
-		}
-	}
-
-	// decode signature
-	signature, err := base64.StdEncoding.Strict().DecodeString(sig.Sig)
-	if err != nil {
-		return fmt.Errorf("error failed to decode signature: %w", err)
-	}
-	// verify payload ecdsa signature
-	ok = ecdsa.VerifyASN1(publicKey, util.SHA256(payload), signature)
-	if !ok {
-		return fmt.Errorf("payload signature is not valid")
-	}
-
-	return nil
-}
-
-func ValidPayloadType(payloadType string) bool {
-	return payloadType == intoto.PayloadType || payloadType == ociv1.MediaTypeDescriptor
-}

pkg/config/config.go

@@ -1,77 +0,0 @@
-package config
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"regexp"
-
-	"github.com/docker/attest/pkg/tuf"
-	"sigs.k8s.io/yaml"
-)
-
-const (
-	MappingFilename = "mapping.yaml"
-)
-
-func LoadLocalMappings(configDir string) (*PolicyMappings, error) {
-	if configDir == "" {
-		return nil, nil
-	}
-	mappings := &policyMappingsFile{}
-	path := filepath.Join(configDir, MappingFilename)
-	mappingFile, err := os.ReadFile(path)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read local policy mapping file %s: %w", path, err)
-	}
-	err = yaml.Unmarshal(mappingFile, mappings)
-	if err != nil {
-		return nil, fmt.Errorf("failed to unmarshal policy mapping file %s: %w", path, err)
-	}
-	return expandMappingFile(mappings)
-}
-
-func LoadTUFMappings(tufClient tuf.Downloader, localTargetsDir string) (*PolicyMappings, error) {
-	if tufClient == nil {
-		return nil, fmt.Errorf("tuf client not set")
-	}
-	filename := MappingFilename
-	file, err := tufClient.DownloadTarget(filename, filepath.Join(localTargetsDir, filename))
-	if err != nil {
-		return nil, fmt.Errorf("failed to download policy mapping file %s: %w", filename, err)
-	}
-	mappings := &policyMappingsFile{}
-
-	err = yaml.Unmarshal(file.Data, mappings)
-	if err != nil {
-		return nil, fmt.Errorf("failed to unmarshal policy mapping file %s: %w", filename, err)
-	}
-	return expandMappingFile(mappings)
-}
-
-func expandMappingFile(mappingFile *policyMappingsFile) (*PolicyMappings, error) {
-	policies := make(map[string]*PolicyMapping)
-	for _, policy := range mappingFile.Policies {
-		policies[policy.ID] = policy
-	}
-
-	var rules []*PolicyRule
-	for _, rule := range mappingFile.Rules {
-		r, err := regexp.Compile(rule.Pattern)
-		if err != nil {
-			return nil, err
-		}
-		rules = append(rules, &PolicyRule{
-			Pattern:     r,
-			PolicyID:    rule.PolicyID,
-			Replacement: rule.Replacement,
-		})
-	}
-
-	return &PolicyMappings{
-		Version:  mappingFile.Version,
-		Kind:     mappingFile.Kind,
-		Policies: policies,
-		Rules:    rules,
-	}, nil
-}

pkg/mirror/mirror.go

@@ -1,18 +0,0 @@
-package mirror
-
-import (
-	"fmt"
-
-	"github.com/docker/attest/pkg/tuf"
-)
-
-func NewTUFMirror(root []byte, tufPath, metadataURL, targetsURL string, versionChecker tuf.VersionChecker) (*TUFMirror, error) {
-	if root == nil {
-		root = tuf.DockerTUFRootDefault.Data
-	}
-	tufClient, err := tuf.NewClient(&tuf.ClientOptions{InitialRoot: root, Path: tufPath, MetadataSource: metadataURL, TargetsSource: targetsURL, VersionChecker: versionChecker})
-	if err != nil {
-		return nil, fmt.Errorf("failed to create TUF client: %w", err)
-	}
-	return &TUFMirror{TUFClient: tufClient, tufPath: tufPath, metadataURL: metadataURL, targetsURL: targetsURL}, nil
-}

pkg/oci/http.go

@@ -1,27 +0,0 @@
-package oci
-
-import (
-	"net/http"
-
-	"github.com/hashicorp/go-cleanhttp"
-)
-
-type userAgentTransporter struct {
-	userAgent    string
-	roundTripper http.RoundTripper
-}
-
-type Option = func(*http.Client)
-
-func (u *userAgentTransporter) RoundTrip(req *http.Request) (*http.Response, error) {
-	req.Header.Set("User-Agent", u.userAgent)
-
-	return u.roundTripper.RoundTrip(req)
-}
-
-func HTTPTransport() http.RoundTripper {
-	return &userAgentTransporter{
-		userAgent:    "Docker-Client",
-		roundTripper: cleanhttp.DefaultTransport(),
-	}
-}

pkg/policy/evaluator.go

@@ -1,30 +0,0 @@
-package policy
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/docker/attest/pkg/attestation"
-)
-
-type policyEvaluatorCtxKeyType struct{}
-
-var PolicyEvaluatorCtxKey policyEvaluatorCtxKeyType
-
-// sets PolicyEvaluator in context.
-func WithPolicyEvaluator(ctx context.Context, pe Evaluator) context.Context {
-	return context.WithValue(ctx, PolicyEvaluatorCtxKey, pe)
-}
-
-// gets PolicyEvaluator from context, defaults to Rego PolicyEvaluator if not set.
-func GetPolicyEvaluator(ctx context.Context) (Evaluator, error) {
-	t, ok := ctx.Value(PolicyEvaluatorCtxKey).(Evaluator)
-	if !ok {
-		return nil, fmt.Errorf("no policy evaluator client set on context (set one with policy.WithPolicyEvaluator)")
-	}
-	return t, nil
-}
-
-type Evaluator interface {
-	Evaluate(ctx context.Context, resolver attestation.Resolver, pctx *Policy, input *Input) (*Result, error)
-}

pkg/policy/match.go

@@ -1,65 +0,0 @@
-package policy
-
-import (
-	"fmt"
-
-	"github.com/docker/attest/pkg/config"
-)
-
-type matchType string
-
-const (
-	matchTypePolicy        matchType = "policy"
-	matchTypeMatchNoPolicy matchType = "match_no_policy"
-	matchTypeNoMatch       matchType = "no_match"
-)
-
-type policyMatch struct {
-	matchType   matchType
-	policy      *config.PolicyMapping
-	rule        *config.PolicyRule
-	matchedName string
-}
-
-func findPolicyMatch(imageName string, mappings *config.PolicyMappings) (*policyMatch, error) {
-	if mappings == nil {
-		return &policyMatch{matchType: matchTypeNoMatch, matchedName: imageName}, nil
-	}
-	return findPolicyMatchImpl(imageName, mappings, make(map[*config.PolicyRule]bool))
-}
-
-func findPolicyMatchImpl(imageName string, mappings *config.PolicyMappings, matched map[*config.PolicyRule]bool) (*policyMatch, error) {
-	for _, rule := range mappings.Rules {
-		if rule.Pattern.MatchString(imageName) {
-			switch {
-			case rule.PolicyID == "" && rule.Replacement == "":
-				return nil, fmt.Errorf("rule %s has neither policy-id nor rewrite", rule.Pattern)
-			case rule.PolicyID != "" && rule.Replacement != "":
-				return nil, fmt.Errorf("rule %s has both policy-id and rewrite", rule.Pattern)
-			case rule.PolicyID != "":
-				policy := mappings.Policies[rule.PolicyID]
-				if policy != nil {
-					return &policyMatch{
-						matchType:   matchTypePolicy,
-						policy:      policy,
-						rule:        rule,
-						matchedName: imageName,
-					}, nil
-				}
-				return &policyMatch{
-					matchType:   matchTypeMatchNoPolicy,
-					rule:        rule,
-					matchedName: imageName,
-				}, nil
-			case rule.Replacement != "":
-				if matched[rule] {
-					return nil, fmt.Errorf("rewrite loop detected")
-				}
-				matched[rule] = true
-				imageName = rule.Pattern.ReplaceAllString(imageName, rule.Replacement)
-				return findPolicyMatchImpl(imageName, mappings, matched)
-			}
-		}
-	}
-	return &policyMatch{matchType: matchTypeNoMatch, matchedName: imageName}, nil
-}

pkg/policy/match_test.go

@@ -1,121 +0,0 @@
-package policy
-
-import (
-	"path/filepath"
-	"testing"
-
-	"github.com/docker/attest/pkg/config"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func TestFindPolicyMatch(t *testing.T) {
-	testCases := []struct {
-		name       string
-		imageName  string
-		mappingDir string
-
-		expectError       bool
-		expectedMatchType matchType
-		expectedPolicyID  string
-		expectedImageName string
-	}{
-		{
-			name:       "alpine",
-			mappingDir: "doi",
-			imageName:  "docker.io/library/alpine",
-
-			expectedMatchType: matchTypePolicy,
-			expectedPolicyID:  "docker-official-images",
-			expectedImageName: "docker.io/library/alpine",
-		},
-		{
-			name:       "no match",
-			mappingDir: "doi",
-			imageName:  "docker.io/something/else",
-
-			expectedMatchType: matchTypeNoMatch,
-			expectedImageName: "docker.io/something/else",
-		},
-		{
-			name:       "match, no policy",
-			mappingDir: "local",
-			imageName:  "docker.io/library/alpine",
-
-			expectedMatchType: matchTypeMatchNoPolicy,
-			expectedImageName: "docker.io/library/alpine",
-		},
-		{
-			name:       "simple rewrite",
-			mappingDir: "simple-rewrite",
-			imageName:  "mycoolmirror.org/library/alpine",
-
-			expectedMatchType: matchTypePolicy,
-			expectedPolicyID:  "docker-official-images",
-			expectedImageName: "docker.io/library/alpine",
-		},
-		{
-			name:       "rewrite no match",
-			mappingDir: "rewrite-to-no-match",
-			imageName:  "mycoolmirror.org/library/alpine",
-
-			expectedMatchType: matchTypeNoMatch,
-			expectedImageName: "badredirect.org/alpine",
-		},
-		{
-			name:       "rewrite to match, no policy",
-			mappingDir: "rewrite-to-local",
-			imageName:  "mycoolmirror.org/library/alpine",
-
-			expectedMatchType: matchTypeMatchNoPolicy,
-			expectedImageName: "docker.io/library/alpine",
-		},
-		{
-			name:       "multiple rewrites",
-			mappingDir: "rewrite-multiple",
-			imageName:  "myevencoolermirror.org/library/alpine",
-
-			expectedMatchType: matchTypePolicy,
-			expectedPolicyID:  "docker-official-images",
-			expectedImageName: "docker.io/library/alpine",
-		},
-		{
-			name:       "invalid rewrites",
-			mappingDir: "rewrite-invalid",
-			imageName:  "mycoolmirror.org/library/alpine",
-
-			expectError:       true,
-			expectedMatchType: matchTypePolicy,
-			expectedPolicyID:  "docker-official-images",
-			expectedImageName: "docker.io/library/alpine",
-		},
-		{
-			name:       "rewrite loop",
-			mappingDir: "rewrite-loop",
-			imageName:  "yin/alpine",
-
-			expectError: true,
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			mappings, err := config.LoadLocalMappings(filepath.Join("testdata", "mappings", tc.mappingDir))
-			require.NoError(t, err)
-			match, err := findPolicyMatch(tc.imageName, mappings)
-			if tc.expectError {
-				require.Error(t, err)
-				// TODO: check error matches expected error message
-				return
-			}
-			require.NoError(t, err)
-			assert.Equal(t, tc.expectedMatchType, match.matchType)
-			if match.matchType == matchTypePolicy {
-				if assert.NotNil(t, match.policy) {
-					assert.Equal(t, tc.expectedPolicyID, match.policy.ID)
-				}
-			}
-			assert.Equal(t, tc.expectedImageName, match.matchedName)
-		})
-	}
-}

pkg/policy/policy.go

@@ -1,38 +0,0 @@
-package policy
-
-import (
-	"fmt"
-
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/config"
-	"github.com/docker/attest/pkg/oci"
-)
-
-func CreateImageDetailsResolver(imageSource *oci.ImageSpec) (oci.ImageDetailsResolver, error) {
-	switch imageSource.Type {
-	case oci.OCI:
-		return attestation.NewOCILayoutResolver(imageSource)
-	case oci.Docker:
-		return oci.NewRegistryImageDetailsResolver(imageSource)
-	}
-	return nil, fmt.Errorf("unsupported image source type: %s", imageSource.Type)
-}
-
-func CreateAttestationResolver(resolver oci.ImageDetailsResolver, mapping *config.PolicyMapping) (attestation.Resolver, error) {
-	if mapping.Attestations != nil {
-		if mapping.Attestations.Style == config.AttestationStyleAttached {
-			switch resolver := resolver.(type) {
-			case *oci.RegistryImageDetailsResolver:
-				return attestation.NewRegistryResolver(resolver)
-			case *attestation.LayoutResolver:
-				return resolver, nil
-			default:
-				return nil, fmt.Errorf("unsupported image details resolver type: %T", resolver)
-			}
-		}
-		if mapping.Attestations.Repo != "" {
-			return attestation.NewReferrersResolver(resolver, attestation.WithReferrersRepo(mapping.Attestations.Repo))
-		}
-	}
-	return attestation.NewReferrersResolver(resolver)
-}

pkg/policy/policy_test.go

@@ -1,175 +0,0 @@
-package policy_test
-
-import (
-	"encoding/json"
-	"os"
-	"path/filepath"
-	"testing"
-
-	"github.com/docker/attest/internal/test"
-	"github.com/docker/attest/pkg/attestation"
-	"github.com/docker/attest/pkg/config"
-	"github.com/docker/attest/pkg/oci"
-	"github.com/docker/attest/pkg/policy"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func loadAttestation(t *testing.T, path string) *attestation.Envelope {
-	ex, err := os.ReadFile(path)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	env := new(attestation.Envelope)
-	err = json.Unmarshal(ex, env)
-	if err != nil {
-		t.Fatal(err)
-	}
-	return env
-}
-
-func TestRegoEvaluator_Evaluate(t *testing.T) {
-	ctx, _ := test.Setup(t)
-	resolveErrorStr := "failed to resolve policy by id: policy with id non-existent-policy-id not found"
-	TestDataPath := filepath.Join("..", "..", "test", "testdata")
-	ExampleAttestation := filepath.Join(TestDataPath, "example_attestation.json")
-
-	re := policy.NewRegoEvaluator(true)
-
-	defaultResolver := attestation.MockResolver{
-		Envs: []*attestation.Envelope{loadAttestation(t, ExampleAttestation)},
-	}
-
-	testCases := []struct {
-		repo            string
-		expectSuccess   bool
-		isCanonical     bool
-		resolver        attestation.Resolver
-		opts            *policy.Options
-		policyID        string
-		resolveErrorStr string
-	}{
-		{repo: "testdata/policies/allow", expectSuccess: true, resolver: defaultResolver},
-		{repo: "testdata/policies/allow", expectSuccess: true, resolver: defaultResolver, policyID: "docker-official-images"},
-		{repo: "testdata/policies/allow", resolver: defaultResolver, policyID: "non-existent-policy-id", resolveErrorStr: resolveErrorStr},
-		{repo: "testdata/policies/deny", resolver: defaultResolver},
-		{repo: "testdata/policies/verify-sig", expectSuccess: true, resolver: defaultResolver},
-		{repo: "testdata/policies/wrong-key", resolver: defaultResolver},
-		{repo: "testdata/policies/allow-canonical", expectSuccess: true, isCanonical: true, resolver: defaultResolver},
-		{repo: "testdata/policies/allow-canonical", resolver: defaultResolver},
-		{repo: "testdata/policies/no-rego", resolver: defaultResolver, resolveErrorStr: "no policy file found in policy mapping"},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.repo, func(t *testing.T) {
-			input := &policy.Input{
-				Digest: "sha256:test-digest",
-				PURL:   "test-purl",
-			}
-			if !tc.isCanonical {
-				input.Tag = "test"
-			}
-
-			if tc.opts == nil {
-				tc.opts = &policy.Options{
-					LocalTargetsDir: test.CreateTempDir(t, "", "tuf-targets"),
-					PolicyID:        tc.policyID,
-					LocalPolicyDir:  tc.repo,
-					DisableTUF:      true,
-				}
-			}
-			imageName, err := tc.resolver.ImageName(ctx)
-			require.NoError(t, err)
-			resolver := policy.NewResolver(nil, tc.opts)
-			policy, err := resolver.ResolvePolicy(ctx, imageName)
-			if tc.resolveErrorStr != "" {
-				require.Error(t, err)
-				assert.Contains(t, err.Error(), tc.resolveErrorStr)
-				return
-			}
-			require.NoErrorf(t, err, "failed to resolve policy")
-			require.NotNil(t, policy, "policy should not be nil")
-			result, err := re.Evaluate(ctx, tc.resolver, policy, input)
-			require.NoErrorf(t, err, "Evaluate failed")
-
-			if tc.expectSuccess {
-				assert.True(t, result.Success, "Evaluate should have succeeded")
-			} else {
-				assert.False(t, result.Success, "Evaluate should have failed")
-			}
-		})
-	}
-}
-
-func TestLoadingMappings(t *testing.T) {
-	policyMappings, err := config.LoadLocalMappings(filepath.Join("testdata", "policies", "allow"))
-	require.NoError(t, err)
-	assert.Equal(t, len(policyMappings.Rules), 3)
-	for _, mirror := range policyMappings.Rules {
-		if mirror.PolicyID != "" {
-			assert.Equal(t, "docker-official-images", mirror.PolicyID)
-		}
-	}
-}
-
-func TestCreateAttestationResolver(t *testing.T) {
-	mockResolver := attestation.MockResolver{
-		Envs: []*attestation.Envelope{},
-	}
-	layoutResolver := &attestation.LayoutResolver{}
-	registryResolver := &oci.RegistryImageDetailsResolver{}
-
-	nilRepoReferrers := &config.PolicyMapping{
-		Attestations: &config.AttestationConfig{
-			Style: config.AttestationStyleReferrers,
-		},
-	}
-	referrers := &config.PolicyMapping{
-		Attestations: &config.AttestationConfig{
-			Repo:  "localhost:5000/repo",
-			Style: config.AttestationStyleReferrers,
-		},
-	}
-	attached := &config.PolicyMapping{
-		Attestations: &config.AttestationConfig{
-			Style: config.AttestationStyleAttached,
-		},
-	}
-
-	testCases := []struct {
-		name     string
-		resolver oci.ImageDetailsResolver
-		mapping  *config.PolicyMapping
-		errorStr string
-	}{
-		{name: "referrers", resolver: layoutResolver, mapping: referrers},
-		{name: "referrers (no mapped repo)", resolver: layoutResolver, mapping: nilRepoReferrers},
-		{name: "referrers (no mapping)", resolver: layoutResolver, mapping: &config.PolicyMapping{Attestations: nil}},
-		{name: "attached (registry)", resolver: registryResolver, mapping: attached},
-		{name: "attached (layout)", resolver: layoutResolver, mapping: attached},
-		{name: "attached (unsupported)", resolver: mockResolver, mapping: attached, errorStr: "unsupported image details resolver type"},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			resolver, err := policy.CreateAttestationResolver(tc.resolver, tc.mapping)
-			if tc.errorStr == "" {
-				require.NoError(t, err)
-			} else {
-				assert.Contains(t, err.Error(), tc.errorStr)
-			}
-			if tc.mapping.Attestations == nil {
-				return
-			}
-			switch resolver.(type) {
-			case *attestation.ReferrersResolver:
-				assert.Equal(t, tc.mapping.Attestations.Style, config.AttestationStyleReferrers)
-			case *attestation.RegistryResolver:
-				assert.Equal(t, tc.mapping.Attestations.Style, config.AttestationStyleAttached)
-			case *attestation.LayoutResolver:
-				assert.Equal(t, tc.mapping.Attestations.Style, config.AttestationStyleAttached)
-			}
-		})
-	}
-}

pkg/signerverifier/common.go

@@ -1,84 +0,0 @@
-package signerverifier
-
-import (
-	"context"
-	"crypto"
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rand"
-	"crypto/x509"
-	"encoding/pem"
-	"fmt"
-
-	"github.com/docker/attest/internal/util"
-	"github.com/secure-systems-lab/go-securesystemslib/dsse"
-)
-
-type ECDSA256SignerVerifier struct {
-	crypto.Signer
-}
-
-// implement keyid function.
-func (s *ECDSA256SignerVerifier) KeyID() (string, error) {
-	keyid, err := KeyID(s.Signer.Public())
-	if err != nil {
-		return "", fmt.Errorf("error getting keyid: %w", err)
-	}
-	return keyid, nil
-}
-
-func (s *ECDSA256SignerVerifier) Public() crypto.PublicKey {
-	return s.Signer.Public()
-}
-
-func (s *ECDSA256SignerVerifier) Sign(_ context.Context, data []byte) ([]byte, error) {
-	return s.Signer.Sign(rand.Reader, data, crypto.SHA256)
-}
-
-func (s *ECDSA256SignerVerifier) Verify(_ context.Context, data []byte, sig []byte) error {
-	pub, ok := s.Signer.Public().(*ecdsa.PublicKey)
-	if !ok {
-		return fmt.Errorf("public key is not ecdsa")
-	}
-	ok = ecdsa.VerifyASN1(pub, util.SHA256(data), sig)
-	if !ok {
-		return fmt.Errorf("payload signature is not valid")
-	}
-	return nil
-}
-
-func LoadKeyPair(priv []byte) (dsse.SignerVerifier, error) {
-	privateKey, err := parsePriv(priv)
-	if err != nil {
-		return nil, err
-	}
-	return &ECDSA256SignerVerifier{
-		Signer: privateKey,
-	}, nil
-}
-
-func parsePriv(privkeyBytes []byte) (*ecdsa.PrivateKey, error) {
-	p, _ := pem.Decode(privkeyBytes)
-	if p == nil {
-		return nil, fmt.Errorf("privkey file does not contain any PEM data")
-	}
-	if p.Type != "EC PRIVATE KEY" {
-		return nil, fmt.Errorf("privkey file does not contain a priavte key")
-	}
-	privKey, err := x509.ParseECPrivateKey(p.Bytes)
-	if err != nil {
-		return nil, fmt.Errorf("error failed to parse public key: %w", err)
-	}
-
-	return privKey, nil
-}
-
-func GenKeyPair() (dsse.SignerVerifier, error) {
-	signer, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
-	if err != nil {
-		return nil, err
-	}
-	return &ECDSA256SignerVerifier{
-		Signer: signer,
-	}, nil
-}

pkg/tlog/tl.go

@@ -1,267 +0,0 @@
-package tlog
-
-import (
-	"bytes"
-	"context"
-	"crypto/rand"
-	"crypto/sha256"
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/base64"
-	"encoding/pem"
-	"fmt"
-	"math/big"
-	"strings"
-	"time"
-
-	"github.com/docker/attest/internal/util"
-	"github.com/docker/attest/pkg/signerverifier"
-	"github.com/go-openapi/runtime"
-	"github.com/go-openapi/strfmt"
-	"github.com/secure-systems-lab/go-securesystemslib/dsse"
-	"github.com/sigstore/cosign/v2/pkg/cosign"
-	rclient "github.com/sigstore/rekor/pkg/client"
-	"github.com/sigstore/rekor/pkg/generated/models"
-	"github.com/sigstore/rekor/pkg/types"
-	hashedrekord_v001 "github.com/sigstore/rekor/pkg/types/hashedrekord/v0.0.1"
-)
-
-const (
-	DefaultRekorURL = "https://rekor.sigstore.dev"
-)
-
-type tlCtxKeyType struct{}
-
-var TLCtxKey tlCtxKeyType
-
-// sets TL in context.
-func WithTL(ctx context.Context, tl TL) context.Context {
-	return context.WithValue(ctx, TLCtxKey, tl)
-}
-
-// gets TL from context, defaults to Rekor TL if not set.
-func GetTL(ctx context.Context) TL {
-	t, ok := ctx.Value(TLCtxKey).(TL)
-	if !ok {
-		t = &RekorTL{}
-	}
-	return t
-}
-
-type TLPayload struct {
-	Algorithm string
-	Hash      string
-	Signature string
-	PublicKey string
-}
-
-type TL interface {
-	UploadLogEntry(ctx context.Context, subject string, payload, signature []byte, signer dsse.SignerVerifier) ([]byte, error)
-	VerifyLogEntry(ctx context.Context, entryBytes []byte) (time.Time, error)
-	VerifyEntryPayload(entryBytes, payload, publicKey []byte) error
-	UnmarshalEntry(entryBytes []byte) (any, error)
-}
-
-type MockTL struct {
-	UploadLogEntryFunc     func(ctx context.Context, subject string, payload, signature []byte, signer dsse.SignerVerifier) ([]byte, error)
-	VerifyLogEntryFunc     func(ctx context.Context, entryBytes []byte) (time.Time, error)
-	VerifyEntryPayloadFunc func(entryBytes, payload, publicKey []byte) error
-	UnmarshalEntryFunc     func(entryBytes []byte) (any, error)
-}
-
-func (tl *MockTL) UploadLogEntry(ctx context.Context, subject string, payload, signature []byte, signer dsse.SignerVerifier) ([]byte, error) {
-	if tl.UploadLogEntryFunc != nil {
-		return tl.UploadLogEntryFunc(ctx, subject, payload, signature, signer)
-	}
-	return nil, nil
-}
-
-func (tl *MockTL) VerifyLogEntry(ctx context.Context, entryBytes []byte) (time.Time, error) {
-	if tl.VerifyLogEntryFunc != nil {
-		return tl.VerifyLogEntryFunc(ctx, entryBytes)
-	}
-	return time.Time{}, nil
-}
-
-func (tl *MockTL) VerifyEntryPayload(entryBytes, payload, publicKey []byte) error {
-	if tl.VerifyEntryPayloadFunc != nil {
-		return tl.VerifyEntryPayloadFunc(entryBytes, payload, publicKey)
-	}
-	return nil
-}
-
-func (tl *MockTL) UnmarshalEntry(entryBytes []byte) (any, error) {
-	if tl.UnmarshalEntryFunc != nil {
-		return tl.UnmarshalEntryFunc(entryBytes)
-	}
-	return nil, nil
-}
-
-type RekorTL struct{}
-
-// UploadLogEntry submits a PK token signature to the transparency log.
-func (tl *RekorTL) UploadLogEntry(ctx context.Context, subject string, payload, signature []byte, signer dsse.SignerVerifier) ([]byte, error) {
-	// generate self-signed x509 cert
-	pubCert, err := CreateX509Cert(subject, signer)
-	if err != nil {
-		return nil, fmt.Errorf("Error creating x509 cert: %w", err)
-	}
-
-	// generate hash of payload
-	hasher := sha256.New()
-	hasher.Write(payload)
-
-	// upload entry
-	rekorClient, err := rclient.GetRekorClient(DefaultRekorURL)
-	if err != nil {
-		return nil, fmt.Errorf("Error creating rekor client: %w", err)
-	}
-	entry, err := cosign.TLogUpload(ctx, rekorClient, signature, hasher, pubCert)
-	if err != nil {
-		return nil, fmt.Errorf("Error uploading tlog: %w", err)
-	}
-	entryBytes, err := entry.MarshalBinary()
-	if err != nil {
-		return nil, fmt.Errorf("error marshaling TL entry: %w", err)
-	}
-	return entryBytes, nil
-}
-
-// VerifyLogEntry verifies a transparency log entry.
-func (tl *RekorTL) VerifyLogEntry(ctx context.Context, entryBytes []byte) (time.Time, error) {
-	zeroTime := time.Time{}
-	entry, err := tl.UnmarshalEntry(entryBytes)
-	if err != nil {
-		return zeroTime, fmt.Errorf("error failed to unmarshal TL entry: %w", err)
-	}
-	le, ok := entry.(*models.LogEntryAnon)
-	if !ok {
-		return zeroTime, fmt.Errorf("expected entry to be of type *models.LogEntryAnon, got %T", entry)
-	}
-	err = le.Validate(strfmt.Default)
-	if err != nil {
-		return zeroTime, fmt.Errorf("TL entry failed validation: %w", err)
-	}
-
-	// TODO: get rekor public keys from TUF (ours or theirs?), and/or embed the public key in the binary
-	rekorPubKeys, err := cosign.GetRekorPubs(ctx)
-	if err != nil {
-		return zeroTime, fmt.Errorf("error failed to get rekor public keys: %w", err)
-	}
-	err = cosign.VerifyTLogEntryOffline(ctx, le, rekorPubKeys)
-	if err != nil {
-		return zeroTime, fmt.Errorf("TL entry failed verification: %w", err)
-	}
-
-	integratedTime := time.Unix(*le.IntegratedTime, 0)
-
-	return integratedTime, nil
-}
-
-// CreateX509Cert generates a self-signed x509 cert for TL submission.
-func CreateX509Cert(subject string, signer dsse.SignerVerifier) ([]byte, error) {
-	// encode ephemeral public key
-	ecPub, err := x509.MarshalPKIXPublicKey(signer.Public())
-	if err != nil {
-		return nil, fmt.Errorf("error marshaling public key: %w", err)
-	}
-
-	template := x509.Certificate{
-		SerialNumber:            big.NewInt(1),
-		Subject:                 pkix.Name{CommonName: subject},
-		RawSubjectPublicKeyInfo: ecPub,
-		NotBefore:               time.Now(),
-		NotAfter:                time.Now().Add(365 * 24 * time.Hour), // valid for 1 year
-		KeyUsage:                x509.KeyUsageDigitalSignature,
-		ExtKeyUsage:             []x509.ExtKeyUsage{x509.ExtKeyUsageCodeSigning},
-		BasicConstraintsValid:   true,
-		DNSNames:                []string{subject},
-		IsCA:                    false,
-	}
-
-	// dsse.SignerVerifier doesn't implement cypto.Signer exactly
-
-	csigner, ok := signer.(*signerverifier.ECDSA256SignerVerifier)
-	if !ok {
-		return nil, fmt.Errorf("expected signer to be of type *signerverifier.ECDSA_SignerVerifier, got %T", signer)
-	}
-	// create a self-signed X.509 certificate
-	certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, signer.Public(), csigner.Signer)
-	if err != nil {
-		return nil, fmt.Errorf("error creating X.509 certificate: %w", err)
-	}
-	certBlock := &pem.Block{Type: "CERTIFICATE", Bytes: certDER}
-	return pem.EncodeToMemory(certBlock), nil
-}
-
-// VerifyEntryPayload checks that the TL entry payload matches envelope payload.
-func (tl *RekorTL) VerifyEntryPayload(entryBytes, payload, publicKey []byte) error {
-	entry, err := tl.UnmarshalEntry(entryBytes)
-	if err != nil {
-		return fmt.Errorf("error failed to unmarshal TL entry: %w", err)
-	}
-	le, ok := entry.(*models.LogEntryAnon)
-	if !ok {
-		return fmt.Errorf("expected tl entry to be of type *models.LogEntryAnon, got %T", entry)
-	}
-	tlBody, ok := le.Body.(string)
-	if !ok {
-		return fmt.Errorf("expected tl body to be of type string, got %T", entry)
-	}
-	rekord, err := extractHashedRekord(tlBody)
-	if err != nil {
-		return fmt.Errorf("error extract HashedRekord from TL entry: %w", err)
-	}
-
-	// compare payload hashes
-	payloadHash := util.SHA256Hex(payload)
-	if rekord.Hash != payloadHash {
-		return fmt.Errorf("error payload and tl entry hash mismatch")
-	}
-
-	// compare public keys
-	cert, err := base64.StdEncoding.Strict().DecodeString(rekord.PublicKey)
-	if err != nil {
-		return fmt.Errorf("failed to decode public key: %w", err)
-	}
-	p, _ := pem.Decode(cert)
-	result, err := x509.ParseCertificate(p.Bytes)
-	if err != nil {
-		return fmt.Errorf("failed to parse certificate: %w", err)
-	}
-	if !bytes.Equal(result.RawSubjectPublicKeyInfo, publicKey) {
-		return fmt.Errorf("error payload and tl entry public key mismatch")
-	}
-	return nil
-}
-
-func (tl *RekorTL) UnmarshalEntry(entry []byte) (any, error) {
-	le := new(models.LogEntryAnon)
-	err := le.UnmarshalBinary(entry)
-	if err != nil {
-		return nil, fmt.Errorf("error failed to unmarshal TL entry: %w", err)
-	}
-	return le, nil
-}
-
-func extractHashedRekord(body string) (*TLPayload, error) {
-	sig := new(TLPayload)
-	pe, err := models.UnmarshalProposedEntry(base64.NewDecoder(base64.StdEncoding, strings.NewReader(body)), runtime.JSONConsumer())
-	if err != nil {
-		return nil, err
-	}
-	impl, err := types.UnmarshalEntry(pe)
-	if err != nil {
-		return nil, err
-	}
-	switch entry := impl.(type) {
-	case *hashedrekord_v001.V001Entry:
-		sig.Algorithm = *entry.HashedRekordObj.Data.Hash.Algorithm
-		sig.Hash = *entry.HashedRekordObj.Data.Hash.Value
-		sig.Signature = entry.HashedRekordObj.Signature.Content.String()
-		sig.PublicKey = entry.HashedRekordObj.Signature.PublicKey.Content.String()
-		return sig, nil
-	default:
-		return nil, fmt.Errorf("failed to extract haskedrekord, unsupported type: %T", entry)
-	}
-}

pkg/tuf/mock.go

@@ -1,13 +0,0 @@
-package tuf
-
-type MockVersionChecker struct {
-	err error
-}
-
-func NewMockVersionChecker() *MockVersionChecker {
-	return &MockVersionChecker{}
-}
-
-func (vc *MockVersionChecker) CheckVersion(_ Downloader) error {
-	return vc.err
-}

pkg/tuf/tuf_test.go

@@ -1,158 +0,0 @@
-package tuf
-
-import (
-	"context"
-	"fmt"
-	"net/http"
-	"net/http/httptest"
-	"os"
-	"path/filepath"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-	"github.com/theupdateframework/go-tuf/v2/metadata"
-)
-
-var (
-	HTTPTUFTestDataPath = filepath.Join("..", "..", "test", "testdata", "tuf", "test-repo")
-	OCITUFTestDataPath  = filepath.Join("..", "..", "test", "testdata", "tuf", "test-repo-oci")
-)
-
-func CreateTempDir(t *testing.T, dir, pattern string) string {
-	// Create a temporary directory for output oci layout
-	tempDir, err := os.MkdirTemp(dir, pattern)
-	if err != nil {
-		t.Fatalf("Failed to create temp directory: %v", err)
-	}
-
-	// Register a cleanup function to delete the temp directory when the test exits
-	t.Cleanup(func() {
-		if err := os.RemoveAll(tempDir); err != nil {
-			t.Errorf("Failed to remove temp directory: %v", err)
-		}
-	})
-	return tempDir
-}
-
-// NewTufClient creates a new TUF client.
-func TestRootInit(t *testing.T) {
-	tufPath := CreateTempDir(t, "", "tuf_temp")
-
-	// Start a test HTTP server to serve data from /test/testdata/tuf/test-repo/ paths
-	server := httptest.NewServer(http.FileServer(http.Dir(HTTPTUFTestDataPath)))
-	defer server.Close()
-
-	// run local registry
-	registry, regAddr := RunTestRegistry(t)
-	defer func() {
-		if err := registry.Terminate(context.Background()); err != nil {
-			t.Fatalf("failed to terminate container: %s", err) // nolint:gocritic
-		}
-	}()
-	LoadRegistryTestData(t, regAddr, OCITUFTestDataPath)
-
-	alwaysGoodVersionChecker := &MockVersionChecker{err: nil}
-	alwaysBadVersionChecker := &MockVersionChecker{err: assert.AnError}
-
-	testCases := []struct {
-		name           string
-		metadataSource string
-		targetsSource  string
-	}{
-		{"http", server.URL + "/metadata", server.URL + "/targets"},
-		{"oci", regAddr.Host + "/tuf-metadata:latest", regAddr.Host + "/tuf-targets"},
-	}
-
-	for _, tc := range testCases {
-		_, err := NewClient(&ClientOptions{DockerTUFRootDev.Data, tufPath, tc.metadataSource, tc.targetsSource, alwaysGoodVersionChecker})
-		assert.NoErrorf(t, err, "Failed to create TUF client: %v", err)
-
-		// recreation should work with same root
-		_, err = NewClient(&ClientOptions{DockerTUFRootDev.Data, tufPath, tc.metadataSource, tc.targetsSource, alwaysGoodVersionChecker})
-		assert.NoErrorf(t, err, "Failed to recreate TUF client: %v", err)
-
-		_, err = NewClient(&ClientOptions{[]byte("broken"), tufPath, tc.metadataSource, tc.targetsSource, alwaysGoodVersionChecker})
-		assert.Errorf(t, err, "Expected error recreating TUF client with broken root: %v", err)
-
-		_, err = NewClient(&ClientOptions{DockerTUFRootDev.Data, tufPath, tc.metadataSource, tc.targetsSource, alwaysBadVersionChecker})
-		assert.Errorf(t, err, "Expected error recreating TUF client with bad version checker")
-	}
-}
-
-func TestDownloadTarget(t *testing.T) {
-	tufPath := CreateTempDir(t, "", "tuf_temp")
-	targetFile := "test.txt"
-	delegatedRole := testRole
-	delegatedTargetFile := fmt.Sprintf("%s/%s", delegatedRole, targetFile)
-
-	// Start a test HTTP server to serve data from /test/testdata/tuf/test-repo/ paths
-	server := httptest.NewServer(http.FileServer(http.Dir(HTTPTUFTestDataPath)))
-	defer server.Close()
-
-	// run local registry
-	registry, regAddr := RunTestRegistry(t)
-	defer func() {
-		if err := registry.Terminate(context.Background()); err != nil {
-			t.Fatalf("failed to terminate container: %s", err) // nolint:gocritic
-		}
-	}()
-	LoadRegistryTestData(t, regAddr, OCITUFTestDataPath)
-
-	alwaysGoodVersionChecker := &MockVersionChecker{err: nil}
-
-	testCases := []struct {
-		name           string
-		metadataSource string
-		targetsSource  string
-	}{
-		{"http", server.URL + "/metadata", server.URL + "/targets"},
-		{"oci", regAddr.Host + "/tuf-metadata:latest", regAddr.Host + "/tuf-targets"},
-		{"http, download before init", server.URL + "/metadata", server.URL + "/targets"},
-	}
-
-	for _, tc := range testCases {
-		tufClient, err := NewClient(&ClientOptions{DockerTUFRootDev.Data, tufPath, tc.metadataSource, tc.targetsSource, alwaysGoodVersionChecker})
-		require.NoErrorf(t, err, "Failed to create TUF client: %v", err)
-		require.NotNil(t, tufClient.updater, "Failed to create updater")
-
-		// get trusted tuf metadata
-		trustedMetadata := tufClient.updater.GetTrustedMetadataSet()
-		assert.NotNil(t, trustedMetadata, "Failed to get trusted metadata")
-
-		// download top-level target files
-		targets := trustedMetadata.Targets[metadata.TARGETS].Signed.Targets
-		for _, target := range targets {
-			// download target files
-			_, err := tufClient.DownloadTarget(target.Path, filepath.Join(tufPath, "download"))
-			assert.NoErrorf(t, err, "Failed to download target: %v", err)
-		}
-
-		// download delegated target
-		targetInfo, err := tufClient.updater.GetTargetInfo(delegatedTargetFile)
-		assert.NoError(t, err)
-		_, err = tufClient.DownloadTarget(targetInfo.Path, filepath.Join(tufPath, targetInfo.Path))
-		assert.NoError(t, err)
-	}
-}
-
-func TestGetEmbeddedTufRootBytes(t *testing.T) {
-	dev, err := GetEmbeddedRoot("dev")
-	assert.NoError(t, err)
-
-	staging, err := GetEmbeddedRoot("staging")
-	assert.NoError(t, err)
-	assert.NotEqual(t, dev.Data, staging.Data)
-
-	prod, err := GetEmbeddedRoot("prod")
-	assert.NoError(t, err)
-	assert.NotEqual(t, dev.Data, prod.Data)
-	assert.NotEqual(t, staging.Data, prod.Data)
-
-	def, err := GetEmbeddedRoot("")
-	assert.NoError(t, err)
-	assert.Equal(t, def.Data, prod.Data)
-
-	_, err = GetEmbeddedRoot("invalid")
-	assert.Error(t, err)
-}

policy/evaluator.go

@@ -0,0 +1,11 @@
+package policy
+
+import (
+	"context"
+
+	"github.com/docker/attest/attestation"
+)
+
+type Evaluator interface {
+	Evaluate(ctx context.Context, resolver attestation.Resolver, pctx *Policy, input *Input) (*Result, error)
+}

policy/mock.go

@@ -3,7 +3,7 @@ package policy
 import (
 	"context"
 
-	"github.com/docker/attest/pkg/attestation"
+	"github.com/docker/attest/attestation"
 )
 
 type MockPolicyEvaluator struct {

policy/policy.go

@@ -0,0 +1,96 @@
+package policy
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/distribution/reference"
+	"github.com/docker/attest/attestation"
+	"github.com/docker/attest/mapping"
+	"github.com/docker/attest/oci"
+	intoto "github.com/in-toto/in-toto-golang/in_toto"
+	"github.com/package-url/packageurl-go"
+)
+
+func CreateImageDetailsResolver(imageSource *oci.ImageSpec) (oci.ImageDetailsResolver, error) {
+	switch imageSource.Type {
+	case oci.OCI:
+		return attestation.NewOCILayoutResolver(imageSource)
+	case oci.Docker:
+		return oci.NewRegistryImageDetailsResolver(imageSource)
+	}
+	return nil, fmt.Errorf("unsupported image source type: %s", imageSource.Type)
+}
+
+func CreateAttestationResolver(resolver oci.ImageDetailsResolver, policyMapping *mapping.PolicyMapping) (attestation.Resolver, error) {
+	if policyMapping.Attestations != nil {
+		if policyMapping.Attestations.Style == mapping.AttestationStyleAttached {
+			switch resolver := resolver.(type) {
+			case *oci.RegistryImageDetailsResolver:
+				return attestation.NewRegistryResolver(resolver)
+			case *attestation.LayoutResolver:
+				return resolver, nil
+			default:
+				return nil, fmt.Errorf("unsupported image details resolver type: %T", resolver)
+			}
+		}
+		if policyMapping.Attestations.Repo != "" {
+			return attestation.NewReferrersResolver(resolver, attestation.WithReferrersRepo(policyMapping.Attestations.Repo))
+		}
+	}
+	return attestation.NewReferrersResolver(resolver)
+}
+
+// VerifySubject verifies if any of the given subject PURLs matches the image name and platform from resolver.
+// Tags are not taken into account when attempting to match because sometimes the user may not have specified a tag, and maybe there
+// isn't a purl subject with that particular tag (because of post build tagging?).
+func VerifySubject(ctx context.Context, subject []intoto.Subject, resolver attestation.Resolver) error {
+	img, err := resolver.ImageName(ctx)
+	if err != nil {
+		return err
+	}
+	inputName, err := reference.ParseNormalizedNamed(img)
+	if err != nil {
+		return err
+	}
+	descriptor, err := resolver.ImageDescriptor(ctx)
+	if err != nil {
+		return err
+	}
+	platform, err := resolver.ImagePlatform(ctx)
+	if err != nil {
+		return err
+	}
+	for _, sub := range subject {
+		if sub.Digest[descriptor.Digest.Algorithm] != descriptor.Digest.Hex {
+			continue
+		}
+		purl, err := packageurl.FromString(sub.Name)
+		if err != nil {
+			continue
+		}
+		if purl.Type != packageurl.TypeDocker {
+			continue
+		}
+		if purl.Qualifiers.Map()["platform"] != platform.String() {
+			continue
+		}
+		// ensure reference is normalized before comparing
+		withNamespace := purl.Name
+		if purl.Namespace != "" {
+			withNamespace = purl.Namespace + "/" + purl.Name
+		}
+		subjectName, err := reference.ParseNormalizedNamed(withNamespace)
+		if err != nil {
+			continue
+		}
+
+		// this assumes that domain is part of the package URL (some say it should be a qualifier)
+		// buildkit puts the domain in the name, e.g. pkg:docker/ecr.io/foobar/alpine@latest?platform=linux%2Famd64
+		if inputName.Name() == subjectName.Name() {
+			// found a match
+			return nil
+		}
+	}
+	return fmt.Errorf("no matching subject found for image: %s", img)
+}

policy/policy_test.go

@@ -0,0 +1,413 @@
+package policy_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/docker/attest/attestation"
+	"github.com/docker/attest/internal/test"
+	"github.com/docker/attest/mapping"
+	"github.com/docker/attest/oci"
+	"github.com/docker/attest/policy"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	intoto "github.com/in-toto/in-toto-golang/in_toto"
+	"github.com/package-url/packageurl-go"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func loadAttestation(t *testing.T, path string) *attestation.Envelope {
+	ex, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	env := new(attestation.Envelope)
+	err = json.Unmarshal(ex, env)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return env
+}
+
+func TestRegoEvaluator_Evaluate(t *testing.T) {
+	ctx, _ := test.Setup(t)
+	resolveErrorStr := "failed to resolve policy by id: policy with id non-existent-policy-id not found"
+	TestDataPath := filepath.Join("..", "test", "testdata")
+	ExampleAttestation := filepath.Join(TestDataPath, "example_attestation.json")
+
+	verifier, err := attestation.NewVerfier()
+	require.NoError(t, err)
+	re := policy.NewRegoEvaluator(true, verifier)
+	defaultResolver := attestation.MockResolver{
+		Envs: []*attestation.Envelope{loadAttestation(t, ExampleAttestation)},
+	}
+	defaultPlatform, err := v1.ParsePlatform("linux/amd64")
+	require.NoError(t, err)
+	testCases := []struct {
+		policyPath      string
+		expectSuccess   bool
+		isCanonical     bool
+		resolver        attestation.Resolver
+		opts            *policy.Options
+		policyID        string
+		resolveErrorStr string
+	}{
+		{policyPath: "testdata/policies/allow", expectSuccess: true, resolver: defaultResolver},
+		{policyPath: "testdata/policies/allow", expectSuccess: true, resolver: defaultResolver, policyID: "docker-official-images"},
+		{policyPath: "testdata/policies/allow", resolver: defaultResolver, policyID: "non-existent-policy-id", resolveErrorStr: resolveErrorStr},
+		{policyPath: "testdata/policies/deny", resolver: defaultResolver},
+		{policyPath: "testdata/policies/verify-sig", expectSuccess: true, resolver: defaultResolver},
+		{policyPath: "testdata/policies/wrong-key", resolver: defaultResolver},
+		{policyPath: "testdata/policies/allow-canonical", expectSuccess: true, isCanonical: true, resolver: defaultResolver},
+		{policyPath: "testdata/policies/allow-canonical", resolver: defaultResolver},
+		{policyPath: "testdata/policies/no-rego", resolver: defaultResolver, resolveErrorStr: "no policy file found in policy mapping"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.policyPath, func(t *testing.T) {
+			input := &policy.Input{
+				Digest: "sha256:test-digest",
+				PURL:   "test-purl",
+			}
+			if !tc.isCanonical {
+				input.Tag = "test"
+			}
+
+			if tc.opts == nil {
+				tc.opts = &policy.Options{
+					LocalTargetsDir: test.CreateTempDir(t, "", "tuf-targets"),
+					PolicyID:        tc.policyID,
+					LocalPolicyDir:  tc.policyPath,
+					DisableTUF:      true,
+				}
+			}
+			imageName, err := tc.resolver.ImageName(ctx)
+			require.NoError(t, err)
+			resolver := policy.NewResolver(nil, tc.opts)
+			policy, err := resolver.ResolvePolicy(ctx, imageName, defaultPlatform)
+			if tc.resolveErrorStr != "" {
+				require.Error(t, err)
+				assert.Contains(t, err.Error(), tc.resolveErrorStr)
+				return
+			}
+			require.NoErrorf(t, err, "failed to resolve policy")
+			require.NotNil(t, policy, "policy should not be nil")
+			result, err := re.Evaluate(ctx, tc.resolver, policy, input)
+			require.NoErrorf(t, err, "Evaluate failed")
+
+			if tc.expectSuccess {
+				assert.True(t, result.Success, "Evaluate should have succeeded")
+			} else {
+				assert.False(t, result.Success, "Evaluate should have failed")
+			}
+		})
+	}
+}
+
+func TestLoadingMappings(t *testing.T) {
+	policyMappings, err := mapping.LoadLocalMappings(filepath.Join("testdata", "policies", "allow"))
+	require.NoError(t, err)
+	assert.Equal(t, len(policyMappings.Rules), 3)
+	for _, mirror := range policyMappings.Rules {
+		if mirror.PolicyID != "" {
+			assert.Equal(t, "docker-official-images", mirror.PolicyID)
+		}
+	}
+}
+
+func TestCreateAttestationResolver(t *testing.T) {
+	mockResolver := attestation.MockResolver{
+		Envs: []*attestation.Envelope{},
+	}
+	layoutResolver := &attestation.LayoutResolver{}
+	registryResolver := &oci.RegistryImageDetailsResolver{}
+
+	nilRepoReferrers := &mapping.PolicyMapping{
+		Attestations: &mapping.AttestationConfig{
+			Style: mapping.AttestationStyleReferrers,
+		},
+	}
+	referrers := &mapping.PolicyMapping{
+		Attestations: &mapping.AttestationConfig{
+			Repo:  "localhost:5000/repo",
+			Style: mapping.AttestationStyleReferrers,
+		},
+	}
+	attached := &mapping.PolicyMapping{
+		Attestations: &mapping.AttestationConfig{
+			Style: mapping.AttestationStyleAttached,
+		},
+	}
+
+	testCases := []struct {
+		name     string
+		resolver oci.ImageDetailsResolver
+		mapping  *mapping.PolicyMapping
+		errorStr string
+	}{
+		{name: "referrers", resolver: layoutResolver, mapping: referrers},
+		{name: "referrers (no mapped repo)", resolver: layoutResolver, mapping: nilRepoReferrers},
+		{name: "referrers (no mapping)", resolver: layoutResolver, mapping: &mapping.PolicyMapping{Attestations: nil}},
+		{name: "attached (registry)", resolver: registryResolver, mapping: attached},
+		{name: "attached (layout)", resolver: layoutResolver, mapping: attached},
+		{name: "attached (unsupported)", resolver: mockResolver, mapping: attached, errorStr: "unsupported image details resolver type"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			resolver, err := policy.CreateAttestationResolver(tc.resolver, tc.mapping)
+			if tc.errorStr == "" {
+				require.NoError(t, err)
+			} else {
+				assert.Contains(t, err.Error(), tc.errorStr)
+			}
+			if tc.mapping.Attestations == nil {
+				return
+			}
+			switch resolver.(type) {
+			case *attestation.ReferrersResolver:
+				assert.Equal(t, tc.mapping.Attestations.Style, mapping.AttestationStyleReferrers)
+			case *attestation.RegistryResolver:
+				assert.Equal(t, tc.mapping.Attestations.Style, mapping.AttestationStyleAttached)
+			case *attestation.LayoutResolver:
+				assert.Equal(t, tc.mapping.Attestations.Style, mapping.AttestationStyleAttached)
+			}
+		})
+	}
+}
+
+func TestVerifySubject(t *testing.T) {
+	ctx, _ := test.Setup(t)
+	defaultResolver := attestation.MockResolver{}
+	hostWithPort := packageurl.QualifiersFromMap(map[string]string{"platform": "linux/amd64"})
+	withHost := packageurl.NewPackageURL(packageurl.TypeDocker, "localhost:1234", "alpine", "", hostWithPort, "")
+	testCases := []struct {
+		name        string
+		subject     []intoto.Subject
+		img         string
+		expectError bool
+		digest      string
+	}{
+		{
+			name: "library short",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img: "alpine",
+		},
+		{
+			name: "with domain and namespace",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/docker.io/library/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img: "alpine",
+		},
+		{
+			name: "with host and port",
+			subject: []intoto.Subject{
+				{
+					Name: withHost.ToString(),
+				},
+			},
+			img: "localhost:1234/alpine",
+		},
+		{
+			name: "with host and port (from image-signer-verifier tests)",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/registry.local%3A5000/image-signer-verifier-test@10710107227?platform=linux%2Famd64",
+				},
+			},
+			img: "registry.local:5000/image-signer-verifier-test",
+		},
+		{
+			name: "with library",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/library/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img: "alpine",
+		},
+		{
+			name: "library short with tag",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img: "alpine:foo",
+		},
+		{
+			name: "library with namespace",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img: "library/alpine:foo",
+		},
+		{
+			name: "library with domain",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img: "docker.io/library/alpine:foo",
+		},
+		{
+			name: "domain mismatch",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img:         "ecr.io/library/alpine:foo",
+			expectError: true,
+		},
+		{
+			name: "type mismatch",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:node/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img:         "alpine",
+			expectError: true,
+		},
+		{
+			name: "name mismatch",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img:         "library/debian:latest",
+			expectError: true,
+		},
+		{
+			name: "namespace mismatch",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img:         "unsupported/alpine:latest",
+			expectError: true,
+		},
+		{
+			name: "digest mismatch",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img:         "alpine",
+			digest:      "1234",
+			expectError: true,
+		},
+		{
+			name: "platform mismatch",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Farm64",
+				},
+			},
+			img:         "alpine",
+			expectError: true,
+		},
+		{
+			name: "malformed purl",
+			subject: []intoto.Subject{
+				{
+					Name: "not-a-purl",
+				},
+			},
+			img:         "alpine",
+			expectError: true,
+		},
+		{
+			name: "malformed image in valid purl",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine,bar@latest?platform=linux%2Famd64",
+				},
+			},
+			img:         "alpine-broken",
+			expectError: true,
+		},
+		{
+			name: "malformed image name",
+			subject: []intoto.Subject{
+				{
+					Name: "pkg:docker/alpine@latest?platform=linux%2Famd64",
+				},
+			},
+			img:         "foo bar",
+			expectError: true,
+		},
+	}
+
+	digestHex := strings.TrimPrefix(test.UnsignedLinuxAMD64ImageDigest, "sha256:")
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			defaultResolver.Image = tc.img
+			// make sure we're using a fixed platform vs a detected one
+			defaultResolver.PlatformFn = func() (*v1.Platform, error) {
+				return &v1.Platform{Architecture: "amd64", OS: "linux"}, nil
+			}
+			// digest from mock resolver
+			tc.subject[0].Digest = map[string]string{"sha256": digestHex}
+			if tc.digest != "" {
+				tc.subject[0].Digest = map[string]string{"sha256": tc.digest}
+			}
+			err := policy.VerifySubject(ctx, tc.subject, defaultResolver)
+			if tc.expectError {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+	defaultResolver.Image = "alpine"
+	subject := []intoto.Subject{
+		{
+			Name:   "pkg:docker/alpine@latest?platform=linux%2Famd64",
+			Digest: map[string]string{"sha256": digestHex},
+		},
+	}
+
+	// error getting descriptor
+	defaultResolver.DescriptorFn = func() (*v1.Descriptor, error) {
+		return nil, fmt.Errorf("error")
+	}
+	err := policy.VerifySubject(ctx, subject, defaultResolver)
+	require.Error(t, err)
+
+	// error getting platform
+	defaultResolver.DescriptorFn = nil
+	defaultResolver.PlatformFn = func() (*v1.Platform, error) {
+		return nil, fmt.Errorf("error")
+	}
+	err = policy.VerifySubject(ctx, subject, defaultResolver)
+	require.Error(t, err)
+
+	// error getting image name
+	defaultResolver.PlatformFn = nil
+	defaultResolver.Image = ""
+	defaultResolver.ImangeNameFn = func() (string, error) {
+		return "", fmt.Errorf("error")
+	}
+	err = policy.VerifySubject(ctx, subject, defaultResolver)
+	require.Error(t, err)
+}

policy/rego.go

@@ -1,13 +1,15 @@
 package policy
 
 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
 	"os"
 	"path/filepath"
 
-	"github.com/docker/attest/pkg/attestation"
+	"github.com/docker-library/bashbrew/manifest"
+	"github.com/docker/attest/attestation"
 	intoto "github.com/in-toto/in-toto-golang/in_toto"
 	"github.com/open-policy-agent/opa/ast"
 	"github.com/open-policy-agent/opa/rego"
@@ -21,7 +23,8 @@ import (
 )
 
 type regoEvaluator struct {
-	debug bool
+	debug               bool
+	attestationVerifier attestation.Verifier
 }
 
 const (
@@ -29,9 +32,10 @@ const (
 	resultBinding = "result"
 )
 
-func NewRegoEvaluator(debug bool) Evaluator {
+func NewRegoEvaluator(debug bool, attestationVerifier attestation.Verifier) Evaluator {
 	return &regoEvaluator{
-		debug: debug,
+		debug:               debug,
+		attestationVerifier: attestationVerifier,
 	}
 }
 
@@ -86,7 +90,8 @@ func (re *regoEvaluator) Evaluate(ctx context.Context, resolver attestation.Reso
 		rego.Store(store),
 		rego.GenerateJSON(jsonGenerator[Result]()),
 	)
-	for _, custom := range RegoFunctions(resolver) {
+	regoFnOpts := NewRegoFunctionOptions(resolver, re.attestationVerifier)
+	for _, custom := range RegoFunctions(regoFnOpts) {
 		regoOpts = append(regoOpts, custom.Func)
 	}
 
@@ -146,6 +151,12 @@ var attestDecl = &ast.Builtin{
 	Nondeterministic: true,
 }
 
+var internalParseLibraryDefinitionDecl = &ast.Builtin{
+	Name:             "attest.internals.parse_library_definition",
+	Decl:             types.NewFunction(types.Args(types.S), dynamicObj),
+	Nondeterministic: false,
+}
+
 func wrapFunctionResult(value *ast.Term, err error) (*ast.Term, error) {
 	var terms [][2]*ast.Term
 	if err != nil {
@@ -163,70 +174,94 @@ func handleErrors1(f func(rCtx rego.BuiltinContext, a *ast.Term) (*ast.Term, err
 	}
 }
 
-func handleErrors2(f func(rCtx *rego.BuiltinContext, a, b *ast.Term) (*ast.Term, error)) rego.Builtin2 {
+func handleErrors2(f func(rCtx rego.BuiltinContext, a, b *ast.Term) (*ast.Term, error)) rego.Builtin2 {
 	return func(rCtx rego.BuiltinContext, a, b *ast.Term) (*ast.Term, error) {
-		return wrapFunctionResult(f(&rCtx, a, b))
+		return wrapFunctionResult(f(rCtx, a, b))
 	}
 }
 
-func RegoFunctions(resolver attestation.Resolver) []*tester.Builtin {
+func RegoFunctions(regoOpts *RegoFnOpts) []*tester.Builtin {
 	return []*tester.Builtin{
-		{
-			Decl: verifyDecl,
-			Func: rego.Function2(
-				&rego.Function{
-					Name:             verifyDecl.Name,
-					Decl:             verifyDecl.Decl,
-					Memoize:          true,
-					Nondeterministic: verifyDecl.Nondeterministic,
-				},
-				handleErrors2(verifyInTotoEnvelope)),
-		},
-		{
-			Decl: attestDecl,
-			Func: rego.Function1(
-				&rego.Function{
-					Name:             attestDecl.Name,
-					Decl:             attestDecl.Decl,
-					Memoize:          true,
-					Nondeterministic: attestDecl.Nondeterministic,
-				},
-				handleErrors1(fetchInTotoAttestations(resolver))),
-		},
+		builtin2(verifyDecl, regoOpts.verifyInTotoEnvelope),
+		builtin1(attestDecl, regoOpts.fetchInTotoAttestations),
+		builtin1(internalParseLibraryDefinitionDecl, regoOpts.internalParseLibraryDefinition),
 	}
 }
 
-func fetchInTotoAttestations(resolver attestation.Resolver) rego.Builtin1 {
-	return func(rCtx rego.BuiltinContext, predicateTypeTerm *ast.Term) (*ast.Term, error) {
-		predicateTypeStr, ok := predicateTypeTerm.Value.(ast.String)
-		if !ok {
-			return nil, fmt.Errorf("predicateTypeTerm is not a string")
-		}
-		predicateType := string(predicateTypeStr)
+func builtin1(decl *ast.Builtin, f rego.Builtin1) *tester.Builtin {
+	return &tester.Builtin{
+		Decl: decl,
+		Func: rego.Function1(
+			&rego.Function{
+				Name:             decl.Name,
+				Decl:             decl.Decl,
+				Memoize:          true,
+				Nondeterministic: decl.Nondeterministic,
+			},
+			handleErrors1(f)),
+	}
+}
 
-		envelopes, err := resolver.Attestations(rCtx.Context, predicateType)
+func builtin2(decl *ast.Builtin, f rego.Builtin2) *tester.Builtin {
+	return &tester.Builtin{
+		Decl: decl,
+		Func: rego.Function2(
+			&rego.Function{
+				Name:             decl.Name,
+				Decl:             decl.Decl,
+				Memoize:          true,
+				Nondeterministic: decl.Nondeterministic,
+			},
+			handleErrors2(f)),
+	}
+}
+
+type RegoFnOpts struct {
+	attestationResolver attestation.Resolver
+	attestationVerifier attestation.Verifier
+}
+
+// this is exported for testing here and in clients of the library.
+func NewRegoFunctionOptions(resolver attestation.Resolver, verifier attestation.Verifier) *RegoFnOpts {
+	return &RegoFnOpts{
+		attestationResolver: resolver,
+		attestationVerifier: verifier,
+	}
+}
+
+// because we don't control the signature here (blame rego)
+// nolint:gocritic
+func (regoOpts *RegoFnOpts) fetchInTotoAttestations(rCtx rego.BuiltinContext, predicateTypeTerm *ast.Term) (*ast.Term, error) {
+	predicateTypeStr, ok := predicateTypeTerm.Value.(ast.String)
+	if !ok {
+		return nil, fmt.Errorf("predicateTypeTerm is not a string")
+	}
+	predicateType := string(predicateTypeStr)
+
+	envelopes, err := regoOpts.attestationResolver.Attestations(rCtx.Context, predicateType)
+	if err != nil {
+		return nil, err
+	}
+
+	// Convert each envelope to an ast.Value.
+	values := make([]*ast.Term, len(envelopes))
+	for i, envelope := range envelopes {
+		value, err := ast.InterfaceToValue(envelope)
 		if err != nil {
 			return nil, err
 		}
-
-		// Convert each envelope to an ast.Value.
-		values := make([]*ast.Term, len(envelopes))
-		for i, envelope := range envelopes {
-			value, err := ast.InterfaceToValue(envelope)
-			if err != nil {
-				return nil, err
-			}
-			values[i] = ast.NewTerm(value)
-		}
-
-		// Wrap the values in an ast.Set and convert it to an ast.Term.
-		set := ast.NewTerm(ast.NewSet(values...))
-
-		return set, nil
+		values[i] = ast.NewTerm(value)
 	}
+
+	// Wrap the values in an ast.Set and convert it to an ast.Term.
+	set := ast.NewTerm(ast.NewSet(values...))
+
+	return set, nil
 }
 
-func verifyInTotoEnvelope(rCtx *rego.BuiltinContext, envTerm, optsTerm *ast.Term) (*ast.Term, error) {
+// because we don't control the signature here (blame rego)
+// nolint:gocritic
+func (regoOpts *RegoFnOpts) verifyInTotoEnvelope(rCtx rego.BuiltinContext, envTerm, optsTerm *ast.Term) (*ast.Term, error) {
 	env := new(attestation.Envelope)
 	opts := new(attestation.VerifyOptions)
 	err := ast.As(envTerm.Value, env)
@@ -237,10 +272,9 @@ func verifyInTotoEnvelope(rCtx *rego.BuiltinContext, envTerm, optsTerm *ast.Term
 	if err != nil {
 		return nil, fmt.Errorf("failed to cast verifier options: %w", err)
 	}
-
-	payload, err := attestation.VerifyDSSE(rCtx.Context, env, opts)
+	payload, err := attestation.VerifyDSSE(rCtx.Context, regoOpts.attestationVerifier, env, opts)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to verify envelope: %w", err)
 	}
 
 	statement := new(intoto.Statement)
@@ -256,6 +290,11 @@ func verifyInTotoEnvelope(rCtx *rego.BuiltinContext, envTerm, optsTerm *ast.Term
 		return nil, fmt.Errorf("unsupported payload type: %s", env.PayloadType)
 	}
 
+	err = VerifySubject(rCtx.Context, statement.Subject, regoOpts.attestationResolver)
+	if err != nil {
+		return nil, fmt.Errorf("failed to verify subject: %w", err)
+	}
+
 	value, err := ast.InterfaceToValue(statement)
 	if err != nil {
 		return nil, err
@@ -263,6 +302,26 @@ func verifyInTotoEnvelope(rCtx *rego.BuiltinContext, envTerm, optsTerm *ast.Term
 	return ast.NewTerm(value), nil
 }
 
+// because we don't control the signature here (blame rego)
+// nolint:gocritic
+func (regoOpts *RegoFnOpts) internalParseLibraryDefinition(_ rego.BuiltinContext, definitionTerm *ast.Term) (*ast.Term, error) {
+	definitionStr, ok := definitionTerm.Value.(ast.String)
+	if !ok {
+		return nil, fmt.Errorf("predicateTypeTerm is not a string")
+	}
+	definition := string(definitionStr)
+	defBuffer := bytes.NewBufferString(definition)
+	parsed, err := manifest.Parse2822(defBuffer)
+	if err != nil {
+		return nil, err
+	}
+	value, err := ast.InterfaceToValue(parsed)
+	if err != nil {
+		return nil, err
+	}
+	return ast.NewTerm(value), nil
+}
+
 func loadYAML(path string, bs []byte) (interface{}, error) {
 	var x interface{}
 	bs, err := yaml.YAMLToJSON(bs)

policy/rego_test.go

@@ -0,0 +1,89 @@
+package policy
+
+import (
+	"context"
+	"testing"
+
+	"github.com/docker/attest/attestation"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	"github.com/open-policy-agent/opa/tester"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestPolicy(t *testing.T) {
+	paths := []string{"testdata/policies/test/fetch"}
+	modules, store, err := tester.Load(paths, nil)
+	require.NoError(t, err)
+	resolver := &NullAttestationResolver{}
+
+	opts := NewRegoFunctionOptions(resolver, nil)
+	ctx := context.Background()
+	ch, err := tester.NewRunner().
+		SetStore(store).
+		AddCustomBuiltins(RegoFunctions(opts)).
+		CapturePrintOutput(true).
+		RaiseBuiltinErrors(true).
+		EnableTracing(true).
+		SetModules(modules).
+		RunTests(ctx, nil)
+	require.NoError(t, err)
+	require.NoError(t, err)
+	results := buffer(ch)
+	assert.Equalf(t, 1, len(results), "expected 1 results, got %d", len(results))
+	assert.Truef(t, results[0].Pass(), "expected result 1 to pass, got %v", results[0])
+	assert.True(t, resolver.called)
+}
+
+func TestPolicyDefParse(t *testing.T) {
+	paths := []string{"testdata/policies/test/def_parse"}
+	modules, store, err := tester.Load(paths, nil)
+	require.NoError(t, err)
+	resolver := &NullAttestationResolver{}
+
+	opts := NewRegoFunctionOptions(resolver, nil)
+	ctx := context.Background()
+	ch, err := tester.NewRunner().
+		SetStore(store).
+		AddCustomBuiltins(RegoFunctions(opts)).
+		CapturePrintOutput(true).
+		RaiseBuiltinErrors(true).
+		EnableTracing(true).
+		SetModules(modules).
+		RunTests(ctx, nil)
+	require.NoError(t, err)
+	require.NoError(t, err)
+	results := buffer(ch)
+	t.Log(string(results[0].Output))
+	assert.Equalf(t, 1, len(results), "expected 1 results, got %d", len(results))
+	assert.Truef(t, results[0].Pass(), "expected result 1 to pass, got %v", results[0].Location)
+}
+
+func buffer[T any](ch chan T) []T {
+	var out []T
+	for v := range ch {
+		out = append(out, v)
+	}
+	return out
+}
+
+type NullAttestationResolver struct {
+	called bool
+}
+
+func (r *NullAttestationResolver) ImageName(_ context.Context) (string, error) {
+	return "", nil
+}
+
+func (r *NullAttestationResolver) ImagePlatform(_ context.Context) (*v1.Platform, error) {
+	return v1.ParsePlatform("")
+}
+
+func (r *NullAttestationResolver) ImageDescriptor(_ context.Context) (*v1.Descriptor, error) {
+	return nil, nil
+}
+
+func (r *NullAttestationResolver) Attestations(_ context.Context, _ string) ([]*attestation.Envelope, error) {
+	r.called = true
+	return nil, nil
+}

policy/resolver.go

@@ -9,8 +9,9 @@ import (
 
 	"github.com/distribution/reference"
 	"github.com/docker/attest/internal/util"
-	"github.com/docker/attest/pkg/config"
-	"github.com/docker/attest/pkg/tuf"
+	"github.com/docker/attest/mapping"
+	"github.com/docker/attest/tuf"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 )
 
 type Resolver struct {
@@ -25,7 +26,7 @@ func NewResolver(tufClient tuf.Downloader, opts *Options) *Resolver {
 	}
 }
 
-func (r *Resolver) ResolvePolicy(_ context.Context, imageName string) (*Policy, error) {
+func (r *Resolver) ResolvePolicy(_ context.Context, imageName string, platform *v1.Platform) (*Policy, error) {
 	p, err := r.resolvePolicyByID()
 	if err != nil {
 		return nil, fmt.Errorf("failed to resolve policy by id: %w", err)
@@ -37,45 +38,45 @@ func (r *Resolver) ResolvePolicy(_ context.Context, imageName string) (*Policy,
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse image name: %w", err)
 	}
-	localMappings, err := config.LoadLocalMappings(r.opts.LocalPolicyDir)
+	localMappings, err := mapping.LoadLocalMappings(r.opts.LocalPolicyDir)
 	if err != nil {
 		return nil, fmt.Errorf("failed to load local policy mappings: %w", err)
 	}
-	match, err := findPolicyMatch(imageName, localMappings)
+	match, err := localMappings.FindPolicyMatch(imageName, platform)
 	if err != nil {
 		return nil, err
 	}
-	if match.matchType == matchTypePolicy {
-		return r.resolveLocalPolicy(match.policy, imageName, match.matchedName)
+	if match.MatchType == mapping.MatchTypePolicy {
+		return r.resolveLocalPolicy(match.Policy, imageName, match.MatchedName)
 	}
 	if !r.opts.DisableTUF {
-		tufMappings, err := config.LoadTUFMappings(r.tufClient, r.opts.LocalTargetsDir)
+		tufMappings, err := mapping.LoadTUFMappings(r.tufClient, r.opts.LocalTargetsDir)
 		if err != nil {
 			return nil, fmt.Errorf("failed to load tuf policy mappings as fallback: %w", err)
 		}
 
 		// it's a mirror of a tuf policy
-		if match.matchType == matchTypeMatchNoPolicy {
+		if match.MatchType == mapping.MatchTypeMatchNoPolicy {
 			for _, mapping := range tufMappings.Policies {
-				if mapping.ID == match.rule.PolicyID {
-					return r.resolveTUFPolicy(mapping, imageName, match.matchedName)
+				if mapping.ID == match.Rule.PolicyID {
+					return r.resolveTUFPolicy(mapping, imageName, match.MatchedName)
 				}
 			}
 		}
 
 		// try to resolve a tuf policy directly
-		match, err = findPolicyMatch(imageName, tufMappings)
+		match, err = tufMappings.FindPolicyMatch(imageName, platform)
 		if err != nil {
 			return nil, err
 		}
-		if match.matchType == matchTypePolicy {
-			return r.resolveTUFPolicy(match.policy, imageName, match.matchedName)
+		if match.MatchType == mapping.MatchTypePolicy {
+			return r.resolveTUFPolicy(match.Policy, imageName, match.MatchedName)
 		}
 	}
 	return nil, nil
 }
 
-func (r *Resolver) resolveLocalPolicy(mapping *config.PolicyMapping, imageName string, matchedName string) (*Policy, error) {
+func (r *Resolver) resolveLocalPolicy(mapping *mapping.PolicyMapping, imageName string, matchedName string) (*Policy, error) {
 	if r.opts.LocalPolicyDir == "" {
 		return nil, fmt.Errorf("local policy dir not set")
 	}
@@ -118,7 +119,7 @@ func (r *Resolver) resolveLocalPolicy(mapping *config.PolicyMapping, imageName s
 	return policy, nil
 }
 
-func (r *Resolver) resolveTUFPolicy(mapping *config.PolicyMapping, imageName string, matchedName string) (*Policy, error) {
+func (r *Resolver) resolveTUFPolicy(mapping *mapping.PolicyMapping, imageName string, matchedName string) (*Policy, error) {
 	var URI string
 	var digest map[string]string
 	files := make([]*File, 0, len(mapping.Files))
@@ -159,7 +160,7 @@ func (r *Resolver) resolveTUFPolicy(mapping *config.PolicyMapping, imageName str
 
 func (r *Resolver) resolvePolicyByID() (*Policy, error) {
 	if r.opts.PolicyID != "" {
-		localMappings, err := config.LoadLocalMappings(r.opts.LocalPolicyDir)
+		localMappings, err := mapping.LoadLocalMappings(r.opts.LocalPolicyDir)
 		if err != nil {
 			return nil, fmt.Errorf("failed to load local policy mappings: %w", err)
 		}
@@ -171,7 +172,7 @@ func (r *Resolver) resolvePolicyByID() (*Policy, error) {
 		}
 
 		if !r.opts.DisableTUF {
-			tufMappings, err := config.LoadTUFMappings(r.tufClient, r.opts.LocalTargetsDir)
+			tufMappings, err := mapping.LoadTUFMappings(r.tufClient, r.opts.LocalTargetsDir)
 			if err != nil {
 				return nil, fmt.Errorf("failed to load tuf policy mappings by id: %w", err)
 			}

policy/resolver_test.go

@@ -0,0 +1,67 @@
+package policy_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/docker/attest/internal/test"
+	"github.com/docker/attest/policy"
+	"github.com/docker/attest/tuf"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestResolvePolicy(t *testing.T) {
+	localPolicyPath := "testdata/policies/allow"
+	tufPolicyPath := "testdata/policies/allow-canonical"
+	noLocalPolicyPath := "testdata/policies/no-policy"
+	testPolicyID := "docker-official-images"
+	testImageName := "localhost:5001/test/repo:tag"
+	defaultPlatform, err := v1.ParsePlatform("linux/amd64")
+	require.NoError(t, err)
+	testCases := []struct {
+		name              string
+		policyPath        string
+		policyID          string
+		localOverridesTUF bool // if a policy is provided locally, it should override TUF
+		DisableTUF        bool
+	}{
+		{name: "resolve by id (TUF only)", policyID: testPolicyID, DisableTUF: false},
+		{name: "resolve by id (local mapping, TUF policy)", policyPath: noLocalPolicyPath, policyID: testPolicyID, DisableTUF: false},
+		{name: "resolve by id (local mapping, local policy, no TUF)", policyPath: localPolicyPath, policyID: testPolicyID, DisableTUF: true},
+		{name: "resolve by id (local mapping, local policy)", policyPath: localPolicyPath, policyID: testPolicyID, DisableTUF: false, localOverridesTUF: true},
+		{name: "resolve by match (TUF only)", DisableTUF: false},
+		{name: "resolve by match (local mapping, TUF policy)", policyPath: noLocalPolicyPath, DisableTUF: false},
+		{name: "resolve by match (local mapping, local policy, no TUF)", policyPath: localPolicyPath, DisableTUF: true},
+		{name: "resolve by match (local mapping, local policy)", policyPath: localPolicyPath, DisableTUF: false, localOverridesTUF: true},
+	}
+
+	var tufClient tuf.Downloader
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			opts := &policy.Options{}
+			tempDir := test.CreateTempDir(t, "", "tuf-dest")
+			if !tc.DisableTUF {
+				tufClient = tuf.NewMockTufClient(tufPolicyPath)
+			}
+			if tc.policyID != "" {
+				opts.PolicyID = tc.policyID
+			}
+			if tc.policyPath != "" {
+				opts.LocalPolicyDir = tc.policyPath
+			}
+			opts.DisableTUF = tc.DisableTUF
+			opts.LocalTargetsDir = tempDir
+			resolver := policy.NewResolver(tufClient, opts)
+			policy, err := resolver.ResolvePolicy(context.Background(), testImageName, defaultPlatform)
+			require.NoError(t, err)
+			assert.NotNil(t, policy)
+			if tc.DisableTUF || tc.localOverridesTUF {
+				assert.Contains(t, policy.URI, localPolicyPath)
+			} else {
+				assert.Contains(t, policy.URI, tufPolicyPath)
+			}
+		})
+	}
+}

policy/testdata/policies/no-policy/mapping.yaml

@@ -0,0 +1,10 @@
+# map repos to policies
+version: v1
+kind: policy-mapping
+rules:
+  - pattern: "^docker[.]io/library/(.*)$"
+    policy-id: docker-official-images
+  - pattern: ^localhost:5001/(.*)$
+    rewrite: docker.io/library/$1
+  - pattern: ^registry[.]local:5000/(.*)$
+    rewrite: docker.io/library/$1

policy/testdata/policies/test/def_parse/def_parse_test.rego

@@ -0,0 +1,18 @@
+package def_parse_test
+
+import rego.v1
+
+test_parse_library_definition if {
+	def := `Maintainers: me <me@example.com> (@me)
+GitRepo: blah
+
+Tags: 1, 2, 3
+GitCommit: fa105cb3c26c8f0e87d7dbb1bf5293691ac2f688
+File: Dockerfile.foo`
+	result := attest.internals.parse_library_definition(def)
+	definition := result.value
+	definition.Entries[0].GitRepo == "blah"
+	definition.Entries[0].GitCommit == "fa105cb3c26c8f0e87d7dbb1bf5293691ac2f688"
+	definition.Entries[0].Tags == ["1", "2", "3"]
+	definition.Entries[0].File == "Dockerfile.foo"
+}