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Merge a029881776 into e827ce2772

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This commit is contained in:
Alistair Bush 2025-04-25 11:11:52 +02:00 committed by GitHub
commit 5610c12b09
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15 changed files with 904 additions and 16 deletions
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30
manifest/ocischema/index.go
View File

@ -59,9 +59,16 @@ type ImageIndex struct {
// MediaType is the media type of this schema.
MediaType string `json:"mediaType,omitempty"`
// ArtifactType is the type of an artifact when the manifest is used for an
// artifact.
ArtifactType string `json:"artifactType,omitempty"`
// Manifests references a list of manifests
Manifests []v1.Descriptor `json:"manifests"`
// Subject is the descriptor of a manifest referred to by this manifest.
Subject *v1.Descriptor `json:"subject,omitempty"`
// Annotations is an optional field that contains arbitrary metadata for the
// image index
Annotations map[string]string `json:"annotations,omitempty"`
@ -87,17 +94,22 @@ type DeserializedImageIndex struct {
// and its JSON representation. If annotations is nil or empty then the
// annotations property will be omitted from the JSON representation.
func FromDescriptors(descriptors []v1.Descriptor, annotations map[string]string) (*DeserializedImageIndex, error) {
return fromDescriptorsWithMediaType(descriptors, annotations, v1.MediaTypeImageIndex)
return fromDescriptorsWithMediaType(descriptors, nil, annotations, v1.MediaTypeImageIndex)
}
// fromDescriptorsWithMediaType is for testing purposes, it's useful to be able to specify the media type explicitly
func fromDescriptorsWithMediaType(descriptors []v1.Descriptor, annotations map[string]string, mediaType string) (_ *DeserializedImageIndex, err error) {
func fromDescriptorsWithMediaType(descriptors []v1.Descriptor, subject *v1.Descriptor, annotations map[string]string, mediaType string) (_ *DeserializedImageIndex, err error) {
m := ImageIndex{
Versioned: specs.Versioned{SchemaVersion: 2},
MediaType: mediaType,
Subject: subject,
Annotations: annotations,
}
if subject != nil {
m.ArtifactType = "application/text"
}
m.Manifests = make([]v1.Descriptor, len(descriptors))
copy(m.Manifests, descriptors)
@ -162,3 +174,17 @@ func validateIndex(b []byte) error {
}
return nil
}
// Subject returns a pointer to the subject of this manifest or nil if there is
// none
func (m *DeserializedImageIndex) Subject() *distribution.Descriptor {
return m.ImageIndex.Subject
}
// Type returns the artifactType of the manifest
func (m *DeserializedImageIndex) Type() string {
if m.ArtifactType == "" {
return m.ImageIndex.MediaType
}
return m.ArtifactType
}

2
manifest/ocischema/index_test.go
View File

@ -85,7 +85,7 @@ func makeTestOCIImageIndex(t *testing.T, mediaType string) ([]v1.Descriptor, *De
"com.example.locale": "en_GB",
}
deserialized, err := fromDescriptorsWithMediaType(manifestDescriptors, annotations, mediaType)
deserialized, err := fromDescriptorsWithMediaType(manifestDescriptors, nil, annotations, mediaType)
if err != nil {
t.Fatalf("error creating DeserializedManifestList: %v", err)
}

36
manifest/ocischema/manifest.go
View File

@ -58,10 +58,17 @@ type Manifest struct {
// Config references the image configuration as a blob.
Config v1.Descriptor `json:"config"`
// ArtifactType is the type of an artifact when the manifest is used for an
// artifact.
ArtifactType string `json:"artifactType,omitempty"`
// Layers lists descriptors for the layers referenced by the
// configuration.
Layers []v1.Descriptor `json:"layers"`
// Subject is the descriptor of a manifest referred to by this manifest.
Subject *v1.Descriptor `json:"subject,omitempty"`
// Annotations contains arbitrary metadata for the image manifest.
Annotations map[string]string `json:"annotations,omitempty"`
}
@ -116,6 +123,21 @@ func (m *DeserializedManifest) UnmarshalJSON(b []byte) error {
v1.MediaTypeImageManifest, mfst.MediaType)
}
if mfst.Config.MediaType == v1.MediaTypeEmptyJSON && mfst.ArtifactType == "" {
return fmt.Errorf("if config.mediaType is '%s' then artifactType must be set", v1.MediaTypeEmptyJSON)
}
// The subject if specified must be a manifest. This is validated here
// rather than in the storage manifest Put handler because the subject does
// not have to exist, so there is nothing to validate in the manifest store.
// If a non-compliant client provided the digest of a blob then this
// registry would still indicate that the referred manifest does not exist.
if mfst.Subject != nil {
if !distribution.ManifestMediaTypeSupported(mfst.Subject.MediaType) {
return fmt.Errorf("subject.mediaType must be a manifest, not '%s'", mfst.Subject.MediaType)
}
}
m.Manifest = mfst
return nil
@ -137,6 +159,20 @@ func (m *DeserializedManifest) Payload() (string, []byte, error) {
return v1.MediaTypeImageManifest, m.canonical, nil
}
// Subject returns a pointer to the subject of this manifest or nil if there is
// none
func (m *DeserializedManifest) Subject() *distribution.Descriptor {
return m.Manifest.Subject
}
// Type returns the artifactType of the manifest
func (m *DeserializedManifest) Type() string {
if m.ArtifactType == "" {
return m.Config.MediaType
}
return m.ArtifactType
}
// validateManifest returns an error if the byte slice is invalid JSON or if it
// contains fields that belong to a index
func validateManifest(b []byte) error {

217
manifest/ocischema/manifest_test.go
View File

@ -6,6 +6,8 @@ import (
"reflect"
"testing"
"github.com/distribution/distribution/v3/manifest/schema2"
"github.com/distribution/distribution/v3"
"github.com/distribution/distribution/v3/manifest/manifestlist"
"github.com/opencontainers/go-digest"
@ -39,6 +41,14 @@ const expectedManifestSerialization = `{
}
}`
var (
emptyJsonDescriptor = distribution.Descriptor{
MediaType: v1.DescriptorEmptyJSON.MediaType,
Size: v1.DescriptorEmptyJSON.Size,
Digest: v1.DescriptorEmptyJSON.Digest,
}
)
func makeTestManifest(mediaType string) Manifest {
return Manifest{
Versioned: specs.Versioned{SchemaVersion: 2},
@ -243,3 +253,210 @@ func TestValidateManifest(t *testing.T) {
}
})
}
func TestArtifactManifest(t *testing.T) {
for name, test := range map[string]struct {
manifest Manifest
expectValid bool
expectedArtifactType string
}{
"not_artifact": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
MediaType: v1.MediaTypeImageManifest,
Config: distribution.Descriptor{
MediaType: v1.MediaTypeImageConfig,
Size: 200,
Digest: "sha256:4de6702c739d8c9ed907f4c031fd0abc54ee1bf372603a585e139730772cc0b8",
},
Layers: []distribution.Descriptor{
{
MediaType: v1.MediaTypeImageLayerGzip,
Size: 23423,
Digest: "sha256:ff1b4a27562d8ffc821b4d7368818ad7c759cfc2068b7adf0d2712315d67359a",
},
},
},
expectValid: true,
expectedArtifactType: v1.MediaTypeImageConfig,
},
"typical_artifact": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
Config: distribution.Descriptor{
MediaType: "application/vnd.example.thing",
Size: 200,
Digest: "sha256:4de6702c739d8c9ed907f4c031fd0abc54ee1bf372603a585e139730772cc0b8",
},
Layers: []distribution.Descriptor{
{
MediaType: v1.MediaTypeImageLayerGzip,
Size: 23423,
Digest: "sha256:ff1b4a27562d8ffc821b4d7368818ad7c759cfc2068b7adf0d2712315d67359a",
},
},
},
expectValid: true,
expectedArtifactType: "application/vnd.example.thing",
},
"also_typical_artifact": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
ArtifactType: "application/vnd.example.sbom",
Config: distribution.Descriptor{
MediaType: v1.MediaTypeImageConfig,
Size: 200,
Digest: "sha256:4de6702c739d8c9ed907f4c031fd0abc54ee1bf372603a585e139730772cc0b8",
},
Layers: []distribution.Descriptor{
{
MediaType: v1.MediaTypeImageLayerGzip,
Size: 23423,
Digest: "sha256:ff1b4a27562d8ffc821b4d7368818ad7c759cfc2068b7adf0d2712315d67359a",
},
},
},
expectValid: true,
expectedArtifactType: "application/vnd.example.sbom",
},
"configless_artifact": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
ArtifactType: "application/vnd.example.catgif",
Config: emptyJsonDescriptor,
Layers: []distribution.Descriptor{
{
MediaType: "image/gif",
Size: 23423,
Digest: "sha256:ff1b4a27562d8ffc821b4d7368818ad7c759cfc2068b7adf0d2712315d67359a",
},
},
},
expectValid: true,
expectedArtifactType: "application/vnd.example.catgif",
},
"invalid_artifact": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
Config: emptyJsonDescriptor, // This MUST have an artifactType
Layers: []distribution.Descriptor{
{
MediaType: "image/gif",
Size: 23423,
Digest: "sha256:ff1b4a27562d8ffc821b4d7368818ad7c759cfc2068b7adf0d2712315d67359a",
},
},
},
expectValid: false,
},
"annotation_artifact": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2.,
},
ArtifactType: "application/vnd.example.comment",
Config: emptyJsonDescriptor,
Layers: []distribution.Descriptor{
emptyJsonDescriptor,
},
Annotations: map[string]string{
"com.example.data": "payload",
},
},
expectValid: true,
expectedArtifactType: "application/vnd.example.comment",
},
"valid_subject": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
ArtifactType: "application/vnd.example.comment",
Config: emptyJsonDescriptor,
Layers: []distribution.Descriptor{
emptyJsonDescriptor,
},
Subject: &distribution.Descriptor{
MediaType: v1.MediaTypeImageManifest,
Size: 365,
Digest: "sha256:05b3abf2579a5eb66403cd78be557fd860633a1fe2103c7642030defe32c657f",
},
Annotations: map[string]string{
"com.example.data": "payload",
},
},
expectValid: true,
expectedArtifactType: "application/vnd.example.comment",
},
"invalid_subject": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
ArtifactType: "application/vnd.example.comment",
Config: emptyJsonDescriptor,
Layers: []distribution.Descriptor{
emptyJsonDescriptor,
},
Subject: &distribution.Descriptor{
MediaType: v1.MediaTypeImageLayerGzip, // The subject is a manifest
Size: 365,
Digest: "sha256:05b3abf2579a5eb66403cd78be557fd860633a1fe2103c7642030defe32c657f",
},
Annotations: map[string]string{
"com.example.data": "payload",
},
},
expectValid: false,
},
"docker_manifest_valid_as_subject": {
manifest: Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
ArtifactType: "application/vnd.example.comment",
Config: emptyJsonDescriptor,
Layers: []distribution.Descriptor{
emptyJsonDescriptor,
},
Subject: &distribution.Descriptor{
MediaType: schema2.MediaTypeManifest,
Size: 365,
Digest: "sha256:05b3abf2579a5eb66403cd78be557fd860633a1fe2103c7642030defe32c657f",
},
Annotations: map[string]string{
"com.example.data": "payload",
},
},
expectValid: true,
expectedArtifactType: "application/vnd.example.comment",
},
} {
t.Run(name, func(t *testing.T) {
dm, err := FromStruct(test.manifest)
if err != nil {
t.Fatalf("Error making DeserializedManifest from struct: %s", err)
}
m, _, err := distribution.UnmarshalManifest(v1.MediaTypeImageManifest, dm.canonical)
if test.expectValid != (nil == err) {
t.Fatalf("expectValid=%t but got err=%v", test.expectValid, err)
}
if err != nil {
return
}
if artifactType := m.(distribution.Referrer).Type(); artifactType != test.expectedArtifactType {
t.Errorf("Expected artifactType to be %q but got %q", test.expectedArtifactType, artifactType)
}
})
}
}

18
manifests.go
View File

@ -27,6 +27,18 @@ type Manifest interface {
Payload() (mediaType string, payload []byte, err error)
}
// Referrer represents a Manifest which can refer to a subject.
type Referrer interface {
// Subject returns a pointer to a Descriptor representing the manifest which
// this manifest refers to or nil if this manifest does not refer to a
// subject.
Subject() *Descriptor
// Type returns the type of the referrer if there is one, otherwise it
// returns empty string
Type() string
}
// ManifestService describes operations on manifests.
type ManifestService interface {
// Exists returns true if the manifest exists.
@ -68,6 +80,12 @@ func ManifestMediaTypes() (mediaTypes []string) {
return
}
// ManifestMediaTypeSupported returns true if the given mediaType is supported.
func ManifestMediaTypeSupported(mediaType string) bool {
_, ok := mappings[mediaType]
return ok
}
// UnmarshalFunc implements manifest unmarshalling a given MediaType
type UnmarshalFunc func([]byte) (Manifest, v1.Descriptor, error)

12
registry/api/errcode/register.go
View File

@ -178,7 +178,7 @@ var (
ErrorCodeManifestBlobUnknown = register(errGroup, ErrorDescriptor{
Value: "MANIFEST_BLOB_UNKNOWN",
Message: "blob unknown to registry",
Description: `This error may be returned when a manifest blob is
Description: `This error may be returned when a manifest blob is
unknown to the registry.`,
HTTPStatusCode: http.StatusBadRequest,
})
@ -224,6 +224,16 @@ var (
the maximum allowed.`,
HTTPStatusCode: http.StatusBadRequest,
})
// ErrorCodeManifestNotAcceptable is returned when the manifest found is not
// acceptable according to the client's Accept header
ErrorCodeManifestNotAcceptable = register(errGroup, ErrorDescriptor{
Value: "MANIFEST_NOT_ACCEPTABLE",
Message: "manifest does not match Accept header",
Description: `This is returned if the manifest known to the registry
has a different mediaType then the client's Accept header.`,
HTTPStatusCode: http.StatusNotAcceptable,
})
)
var (

485
registry/handlers/api_test.go
View File

@ -19,6 +19,9 @@ import (
"strings"
"testing"
"github.com/distribution/distribution/v3/manifest/ocischema"
v1 "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/distribution/distribution/v3"
"github.com/distribution/distribution/v3/configuration"
"github.com/distribution/distribution/v3/manifest/manifestlist"
@ -33,12 +36,18 @@ import (
"github.com/gorilla/handlers"
"github.com/opencontainers/go-digest"
"github.com/opencontainers/image-spec/specs-go"
v1 "github.com/opencontainers/image-spec/specs-go/v1"
)
var headerConfig = http.Header{
"X-Content-Type-Options": []string{"nosniff"},
}
var (
headerConfig = http.Header{
"X-Content-Type-Options": []string{"nosniff"},
}
emptyJsonDescriptor = distribution.Descriptor{
MediaType: v1.DescriptorEmptyJSON.MediaType,
Size: v1.DescriptorEmptyJSON.Size,
Digest: v1.DescriptorEmptyJSON.Digest,
}
)
const (
// digestSha256EmptyTar is the canonical sha256 digest of empty data
@ -2856,3 +2865,471 @@ func TestProxyManifestGetByTag(t *testing.T) {
"Docker-Content-Digest": []string{newDigest.String()},
})
}
func TestArtifactManifest(t *testing.T) {
for name, test := range map[string]struct {
manifest func(*testing.T, *testEnv, reference.Named) distribution.Manifest
deleteSubject bool
}{
// The link is made when the subject already exists and is kept if the
// subject is deleted
"subject_exists": {
manifest: func(t *testing.T, testEnv *testEnv, repo reference.Named) distribution.Manifest {
args := testManifestAPISchema2(t, testEnv, repo, "schema2tag")
_, payload, err := args.manifest.Payload()
if err != nil {
t.Fatalf("Failed to get subject payload: %s", err)
}
pushScratch(t, testEnv, repo)
manifest, err := ocischema.FromStruct(ocischema.Manifest{
Versioned: specs.Versioned{SchemaVersion: 2},
ArtifactType: "application/vnd.example.sbom.v1",
Config: emptyJsonDescriptor,
Subject: &distribution.Descriptor{
MediaType: args.mediaType,
Digest: args.dgst,
Size: int64(len(payload)),
},
})
if err != nil {
t.Fatalf("Failed to create manifest: %s", err)
}
return manifest
},
deleteSubject: true,
},
// When an OCI Image Manifest with a subject field is PUT before its
// subject, the subject's referrers link will be made in advance.
"image_manifest_with_subject": {
manifest: func(t *testing.T, testEnv *testEnv, repo reference.Named) distribution.Manifest {
config, configDigest, err := testutil.CreateRandomTarFile()
if err != nil {
t.Fatalf("Failed to create test blob: %s", err)
}
url, _ := startPushLayer(t, testEnv, repo)
pushLayer(t, testEnv.builder, repo, configDigest, url, config)
manifest, err := ocischema.FromStruct(ocischema.Manifest{
Versioned: specs.Versioned{SchemaVersion: 2},
Config: distribution.Descriptor{
MediaType: v1.MediaTypeImageConfig,
Digest: configDigest,
},
Subject: &distribution.Descriptor{
MediaType: v1.MediaTypeImageManifest,
Digest: "sha256:ebe054f08821294feee7bc442014fdd38b4836d83781d8ba99d38eb50d0c9d85",
Size: 99,
},
})
if err != nil {
t.Fatalf("Failed to create manifest: %s", err)
}
return manifest
},
},
} {
t.Run(name, func(t *testing.T) {
testEnv := newTestEnv(t, true)
defer testEnv.Shutdown()
repo, err := reference.WithName("myrepo/myimage")
if err != nil {
t.Fatalf("failed to make repo: %s", err)
}
manifest := test.manifest(t, testEnv, repo)
contentType, payload, err := manifest.Payload()
if err != nil {
t.Fatalf("Failed to get raw manifest: %s", err)
}
ref, err := reference.WithDigest(repo, digest.FromBytes(payload))
if err != nil {
t.Fatalf("failed to make reference: %s", err)
}
manifestURL, err := testEnv.builder.BuildManifestURL(ref)
if err != nil {
t.Fatalf("Failed to build manifest URL: %s", err)
}
req, err := http.NewRequest(http.MethodPut, manifestURL, bytes.NewReader(payload))
if err != nil {
t.Fatalf("Failed to create artifact PUT request: %s", err)
}
req.Header.Set("Content-Type", contentType)
res, err := http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("Failed to PUT manifest: %s", err)
}
defer res.Body.Close()
if res.StatusCode != http.StatusCreated {
t.Fatalf("Incorrect status code for manifest PUT: %d, expected: %d", res.StatusCode, http.StatusCreated)
}
if res.Header.Get("Docker-Content-Digest") != ref.Digest().String() {
t.Errorf("Incorrect Docker-Content-Digest header: %q, expected %q", res.Header.Get("Docker-Content-Digest"), ref.Digest().String())
}
// TODO(brackendawson): We should now try to get referrers for the subject
// (which should also eventually exist for that to work), but those APIs
// don't exist yet so for now just check the link was made.
referrer, ok := manifest.(distribution.Referrer)
if !ok {
t.Fatalf("Manifest should implement distribution.Referrer: %T", manifest)
}
link, err := testEnv.app.driver.GetContent(context.Background(), fmt.Sprintf("/docker/registry/v2/repositories/%s/_manifests/revisions/sha256/%s/_referrers/_%s/sha256/%s/link",
repo.Name(), referrer.Subject().Digest.Hex(), url.QueryEscape(referrer.Type()), ref.Digest().Hex()))
if err != nil {
t.Fatalf("Failed to get expected referrers link from subject with error: %s", err)
}
if string(link) != ref.Digest().String() {
t.Errorf("Subject's referrers link has incorrect content:\n%s\nexpected:\n%s", string(link), ref.Digest().String())
}
// When an artifact manifest has been PUT it can be retrieved with GET.
location := res.Header.Get("Location")
req, err = http.NewRequest(http.MethodGet, location, nil)
if err != nil {
t.Fatalf("Failed to create artifact GET request: %s", err)
}
res, err = http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("Failed to GET manifest: %s", err)
}
defer res.Body.Close()
if res.StatusCode != http.StatusNotAcceptable {
t.Fatalf("Incorrect status code for manifest GET: %d, expected: %d", res.StatusCode, http.StatusNotAcceptable)
}
req.Header.Set("Accept", contentType)
res, err = http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("Failed to GET manifest: %s", err)
}
defer res.Body.Close()
if res.StatusCode != http.StatusOK {
t.Fatalf("Incorrect status code for manifest GET: %d, expected: %d", res.StatusCode, http.StatusOK)
}
if res.Header.Get("Content-Type") != contentType {
t.Errorf("Incorrect mediaType for manifest GET: %q, expected: %q", res.Header.Get("Content-Type"), contentType)
}
gotManifest, err := io.ReadAll(res.Body)
if err != nil {
t.Fatalf("Failed to read manifest GET body: %s", err)
}
if !reflect.DeepEqual(gotManifest, payload) {
t.Errorf("Pulled manifest does not match pushed manifest, got:\n%s\nexpected:\n%s", string(gotManifest), string(payload))
}
if test.deleteSubject {
// When a subject is deleted, it's referrers link remains
subjectRef, err := reference.WithDigest(repo, referrer.Subject().Digest)
if err != nil {
t.Fatalf("Failed to build subject reference: %s", err)
}
subjectURL, err := testEnv.builder.BuildManifestURL(subjectRef)
if err != nil {
t.Errorf("Failed to build subject URL: %s", err)
}
req, err := http.NewRequest(http.MethodDelete, subjectURL, nil)
if err != nil {
t.Fatalf("Failed to create subject DELETE request: %s", err)
}
res, err := http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("Failed to DELETE subject: %s", err)
}
defer res.Body.Close()
if res.StatusCode != http.StatusAccepted {
t.Fatalf("Incorrect status code for subject DELETE: %s", err)
}
// TODO(brackendawson): We should now try to get referrers for the subject
// (which should also eventually exist for that to work), but those APIs
// don't exist yet so for now just check the link still exists.
link, err := testEnv.app.driver.GetContent(context.Background(), fmt.Sprintf("/docker/registry/v2/repositories/%s/_manifests/revisions/sha256/%s/_referrers/_%s/sha256/%s/link",
repo.Name(), referrer.Subject().Digest.Hex(), url.QueryEscape(referrer.Type()), ref.Digest().Hex()))
if err != nil {
t.Fatalf("Failed to get expected referrers link from subject with error: %s", err)
}
if string(link) != ref.Digest().String() {
t.Errorf("Subject's referrers link has incorrect content:\n%s\nexpected:\n%s", string(link), ref.Digest().String())
}
}
// When an artifact manifest is DELETEd then it will not be found if you GET
// it. Its subject's referrer link will be left dangling.
req, err = http.NewRequest(http.MethodDelete, location, nil)
if err != nil {
t.Fatalf("Failed to create artifact DELETE request: %s", err)
}
res, err = http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("Failed to DELETE manifest: %s", err)
}
defer res.Body.Close()
if res.StatusCode != http.StatusAccepted {
t.Fatalf("Incorrect status code for manifest DELETE: %d, expected: %d", res.StatusCode, http.StatusAccepted)
}
req, err = http.NewRequest(http.MethodGet, location, nil)
if err != nil {
t.Fatalf("Failed to create artifact GET request: %s", err)
}
req.Header.Set("Accept", v1.MediaTypeImageManifest)
res, err = http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("Failed to GET manifest: %s", err)
}
defer res.Body.Close()
if res.StatusCode != http.StatusNotFound {
t.Fatalf("Incorrect status code for manifest GET: %d, expected: %d", res.StatusCode, http.StatusNotFound)
}
})
}
}
func TestDockerManifestWithSubject(t *testing.T) {
// When a docker image manifest containing a "subject" field is uploaded
// then no referrer links are made for that invalid subject.
testEnv := newTestEnv(t, true)
defer testEnv.Shutdown()
repo, err := reference.WithName("test/repo")
if err != nil {
t.Fatalf("Failed to build repo: %s", err)
}
config, configDigest, err := testutil.CreateRandomTarFile()
if err != nil {
t.Fatalf("Failed to make config blob: %s", err)
}
url, _ := startPushLayer(t, testEnv, repo)
pushLayer(t, testEnv.builder, repo, configDigest, url, config)
layer, layerDigest, err := testutil.CreateRandomTarFile()
if err != nil {
t.Fatalf("Failed to make layer blob: %s", err)
}
url, _ = startPushLayer(t, testEnv, repo)
pushLayer(t, testEnv.builder, repo, layerDigest, url, layer)
manifest, err := schema2.FromStruct(schema2.Manifest{
Versioned: specs.Versioned{
SchemaVersion: 2,
},
MediaType: schema2.MediaTypeManifest,
Config: distribution.Descriptor{
MediaType: schema2.MediaTypeImageConfig,
Digest: configDigest,
Size: testutil.MustSeekerLen(config),
},
Layers: []distribution.Descriptor{
{
MediaType: schema2.MediaTypeLayer,
Digest: layerDigest,
Size: testutil.MustSeekerLen(layer),
},
},
})
if err != nil {
t.Fatalf("Failed to make base manifest: %s", err)
}
var manifestFields map[string]interface{}
_, payload, err := manifest.Payload()
if err != nil {
t.Fatalf("Failed to get base manifest payload: %s", err)
}
if err = json.Unmarshal(payload, &manifestFields); err != nil {
t.Fatalf("Failed to unmarshal base manifest: %s", err)
}
manifestFields["subject"] = distribution.Descriptor{
MediaType: schema2.MediaTypeManifest,
Digest: "sha256:118011bef6c697f7107cc0d788664a0f8c7d0316ce8d17673634155f5ecdba39",
Size: 56,
}
rawManifest, _ := json.Marshal(manifestFields)
if err = manifest.UnmarshalJSON(rawManifest); err != nil {
t.Fatalf("Failed to re-build manifest: %s", err)
}
ref, err := reference.WithTag(repo, "latest")
if err != nil {
t.Fatalf("Failed to build reference: %s", err)
}
if url, err = testEnv.builder.BuildManifestURL(ref); err != nil {
t.Fatalf("Failed to build manifest url: %s", err)
}
res := putManifest(t, "putting manifest", url, schema2.MediaTypeManifest, manifest)
if res.StatusCode != http.StatusCreated {
t.Fatalf("Incorrect status code from manifest PUT: %d, expected: %d", res.StatusCode, http.StatusCreated)
}
defer res.Body.Close()
// TODO(brackendawson): We should now try to get referrers for the subject
// (which should also eventually exist for that to work), but those APIs
// don't exist yet so for now just check the link was not made.
_, err = testEnv.app.driver.Stat(context.Background(), fmt.Sprintf("/docker/registry/v2/repositories/%s/_manifests/revisions/sha256/%s/_referrers",
repo.Name(), res.Header.Get("Docker-Content-Digest")))
var expectedErr storagedriver.InvalidPathError
if !errors.As(err, &expectedErr) {
t.Fatalf("Should have got invalid path error for referrer directory: %s", err)
}
}
func TestArtifactManifestValidation(t *testing.T) {
for name, test := range map[string]struct {
config func(*testing.T, *testEnv, reference.Named) distribution.Descriptor
layers func(*testing.T, *testEnv, reference.Named) []distribution.Descriptor
wantCode int
}{
"layers_must_exist": {
config: func(t *testing.T, testEnv *testEnv, repo reference.Named) distribution.Descriptor {
pushScratch(t, testEnv, repo)
return emptyJsonDescriptor
},
layers: func(t *testing.T, te *testEnv, n reference.Named) []distribution.Descriptor {
// a layer which has not been uploaded
return []distribution.Descriptor{
{
MediaType: v1.MediaTypeImageLayer,
Digest: "sha256:7688b6ef52555962d008fff894223582c484517cea7da49ee67800adc7fc8866",
Size: 56,
},
}
},
wantCode: 400,
},
"config_must_be_set": {
config: func(t *testing.T, testEnv *testEnv, repo reference.Named) distribution.Descriptor {
return distribution.Descriptor{} // zero value
},
layers: func(t *testing.T, testEnv *testEnv, repo reference.Named) []distribution.Descriptor {
layers := int64(10)
digests := make([]distribution.Descriptor, layers)
for i := int64(0); i < layers; i++ {
rs, digest, err := testutil.CreateRandomTarFile()
if err != nil {
t.Fatalf("Failed to create test blob: %s", err)
}
url, _ := startPushLayer(t, testEnv, repo)
pushLayer(t, testEnv.builder, repo, digest, url, rs)
digests[i] = distribution.Descriptor{
MediaType: v1.MediaTypeImageLayer,
Digest: digest,
Size: testutil.MustSeekerLen(rs),
}
}
return digests
},
wantCode: 400,
},
"config_must_exist": {
config: func(t *testing.T, testEnv *testEnv, repo reference.Named) distribution.Descriptor {
return emptyJsonDescriptor // not uploaded
},
layers: func(t *testing.T, testEnv *testEnv, repo reference.Named) []distribution.Descriptor {
layers := int64(10)
digests := make([]distribution.Descriptor, layers)
for i := int64(0); i < layers; i++ {
rs, digest, err := testutil.CreateRandomTarFile()
if err != nil {
t.Fatalf("Failed to create test blob: %s", err)
}
url, _ := startPushLayer(t, testEnv, repo)
pushLayer(t, testEnv.builder, repo, digest, url, rs)
digests[i] = distribution.Descriptor{
MediaType: v1.MediaTypeImageLayer,
Digest: digest,
Size: testutil.MustSeekerLen(rs),
}
}
return digests
},
wantCode: 400,
},
"valid_blobs": {
config: func(t *testing.T, testEnv *testEnv, repo reference.Named) distribution.Descriptor {
pushScratch(t, testEnv, repo)
return emptyJsonDescriptor
},
layers: func(t *testing.T, testEnv *testEnv, repo reference.Named) []distribution.Descriptor {
layers := int64(10)
digests := make([]distribution.Descriptor, layers)
for i := int64(0); i < layers; i++ {
rs, digest, err := testutil.CreateRandomTarFile()
if err != nil {
t.Fatalf("Failed to create test blob: %s", err)
}
url, _ := startPushLayer(t, testEnv, repo)
pushLayer(t, testEnv.builder, repo, digest, url, rs)
digests[i] = distribution.Descriptor{
MediaType: v1.MediaTypeImageLayer,
Digest: digest,
Size: testutil.MustSeekerLen(rs),
}
}
return digests
},
wantCode: 201,
},
} {
t.Run(name, func(t *testing.T) {
testEnv := newTestEnv(t, true)
defer testEnv.Shutdown()
repo, err := reference.WithName("myrepo/myimage")
if err != nil {
t.Fatalf("failed to make repo: %s", err)
}
manifest, err := ocischema.FromStruct(ocischema.Manifest{
Versioned: specs.Versioned{SchemaVersion: 2},
Config: test.config(t, testEnv, repo),
ArtifactType: "application/vnd.example.sbom.v1",
Layers: test.layers(t, testEnv, repo),
})
if err != nil {
t.Fatalf("Failed to make manifest: %s", err)
}
contentType, payload, err := manifest.Payload()
if err != nil {
t.Fatalf("Failed to get raw manifest: %s", err)
}
ref, err := reference.WithDigest(repo, digest.FromBytes(payload))
if err != nil {
t.Fatalf("failed to make reference: %s", err)
}
manifestURL, err := testEnv.builder.BuildManifestURL(ref)
if err != nil {
t.Fatalf("Failed to build manifest URL: %s", err)
}
req, err := http.NewRequest(http.MethodPut, manifestURL, bytes.NewReader(payload))
if err != nil {
t.Fatalf("Failed to create artifact PUT request: %s", err)
}
req.Header.Set("Content-Type", contentType)
res, err := http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("Failed to PUT manifest: %s", err)
}
defer res.Body.Close()
if res.StatusCode != test.wantCode {
t.Fatalf("Incorrect status code for manifest PUT: %d, expected: %d", res.StatusCode, test.wantCode)
}
})
}
}
func pushScratch(t *testing.T, testEnv *testEnv, repo reference.Named) {
url, _ := startPushLayer(t, testEnv, repo)
pushLayer(t, testEnv.builder, repo, v1.DescriptorEmptyJSON.Digest, url, bytes.NewBuffer(v1.DescriptorEmptyJSON.Data))
}

4
registry/handlers/manifests.go
View File

@ -161,11 +161,11 @@ func (imh *manifestHandler) GetManifest(w http.ResponseWriter, r *http.Request)
}
if manifestType == ociSchema && !supports[ociSchema] {
imh.Errors = append(imh.Errors, errcode.ErrorCodeManifestUnknown.WithMessage("OCI manifest found, but accept header does not support OCI manifests"))
imh.Errors = append(imh.Errors, errcode.ErrorCodeManifestNotAcceptable.WithMessage("OCI manifest found, but accept header does not support OCI manifests"))
return
}
if manifestType == ociImageIndexSchema && !supports[ociImageIndexSchema] {
imh.Errors = append(imh.Errors, errcode.ErrorCodeManifestUnknown.WithMessage("OCI index found, but accept header does not support OCI indexes"))
imh.Errors = append(imh.Errors, errcode.ErrorCodeManifestNotAcceptable.WithMessage("OCI index found, but accept header does not support OCI indexes"))
return
}

6
registry/storage/driver/storagedriver.go
View File

@ -134,9 +134,9 @@ type FileWriter interface {
// PathRegexp is the regular expression which each file path must match. A
// file path is absolute, beginning with a slash and containing a positive
// number of path components separated by slashes, where each component is
// restricted to alphanumeric characters or a period, underscore, or
// hyphen.
var PathRegexp = regexp.MustCompile(`^(/[A-Za-z0-9._-]+)+$`)
// restricted to alphanumeric characters or a period, underscore, hyphen or
// percent.
var PathRegexp = regexp.MustCompile(`^(/[A-Za-z0-9._%-]+)+$`)
// ErrUnsupportedMethod may be returned in the case where a StorageDriver implementation does not support an optional method.
type ErrUnsupportedMethod struct {

13
registry/storage/ocimanifesthandler.go
View File

@ -18,6 +18,7 @@ type ocischemaManifestHandler struct {
blobStore distribution.BlobStore
ctx context.Context
manifestURLs manifestURLs
references ReferenceService
}
var _ ManifestHandler = &ocischemaManifestHandler{}
@ -45,11 +46,19 @@ func (ms *ocischemaManifestHandler) Put(ctx context.Context, manifest distributi
return "", err
}
mt, payload, err := m.Payload()
mt, payload, err := manifest.Payload()
if err != nil {
return "", err
}
if referrer, ok := manifest.(distribution.Referrer); ok {
if subject := referrer.Subject(); subject != nil {
if err := ms.references.Link(ctx, referrer.Type(), digest.FromBytes(payload), subject.Digest); err != nil {
return "", err
}
}
}
revision, err := ms.blobStore.Put(ctx, mt, payload)
if err != nil {
dcontext.GetLogger(ctx).Errorf("error putting payload into blobstore: %v", err)
@ -88,7 +97,7 @@ func (ms *ocischemaManifestHandler) verifyManifest(ctx context.Context, mnfst oc
}
switch descriptor.MediaType {
case v1.MediaTypeImageLayer, v1.MediaTypeImageLayerGzip, v1.MediaTypeImageLayerNonDistributable, v1.MediaTypeImageLayerNonDistributableGzip: //nolint:staticcheck // ignore A1019: v1.MediaTypeImageLayerNonDistributable is deprecated: Non-distributable layers are deprecated, and not recommended for future use.
case v1.MediaTypeImageLayer, v1.MediaTypeImageLayerGzip, v1.MediaTypeImageLayerNonDistributable, v1.MediaTypeImageLayerNonDistributableGzip: //nolint:staticcheck // Ignore SA1019 v1.MediaTypeImageLayerNonDistributable is deprecated, it is used for backwards compatibility
allow := ms.manifestURLs.allow
deny := ms.manifestURLs.deny
for _, u := range descriptor.URLs {

2
registry/storage/ocimanifesthandler_test.go
View File

@ -36,7 +36,7 @@ func TestVerifyOCIManifestNonDistributableLayer(t *testing.T) {
nonDistributableLayer := v1.Descriptor{
Digest: "sha256:463435349086340864309863409683460843608348608934092322395278926a",
Size: 6323,
MediaType: v1.MediaTypeImageLayerNonDistributableGzip, //nolint:staticcheck // ignore A1019: v1.MediaTypeImageLayerNonDistributableGzip is deprecated: Non-distributable layers are deprecated, and not recommended for future use
MediaType: v1.MediaTypeImageLayerNonDistributableGzip, //nolint:staticcheck // Ignore SA1019 v1.MediaTypeImageLayerNonDistributable is deprecated, it is used for backwards compatibility
}
emptyLayer := v1.Descriptor{

29
registry/storage/paths.go
View File

@ -2,6 +2,7 @@ package storage
import (
"fmt"
"net/url"
"path"
"strings"
@ -114,6 +115,10 @@ const (
// blobPathSpec: <root>/v2/blobs/<algorithm>/<first two hex bytes of digest>/<hex digest>
// blobDataPathSpec: <root>/v2/blobs/<algorithm>/<first two hex bytes of digest>/<hex digest>/data
//
// Artifacts:
//
// subjectReferrerPathSpec <root>/v2/repositories/<name>/_manifests/revisions/<algorithm>/<subject hex digest>/_referrers/_<artifactType>/<algorithm>/<referrer hex digest>/link
//
// For more information on the semantic meaning of each path and their
// contents, please see the path spec documentation.
func pathFor(spec pathSpec) (string, error) {
@ -250,6 +255,19 @@ func pathFor(spec pathSpec) (string, error) {
return path.Join(append(repoPrefix, v.name, "_uploads", v.id, "hashstates", string(v.alg), offset)...), nil
case repositoriesRootPathSpec:
return path.Join(repoPrefix...), nil
case subjectReferrerLinkPathSpec:
manifestPath, err := pathFor(manifestRevisionPathSpec{name: v.name, revision: v.subject})
if err != nil {
return "", err
}
artifactType := "_" + url.QueryEscape(v.mediaType)
components, err := digestPathComponents(v.referrer, false)
if err != nil {
return "", err
}
return path.Join(manifestPath, "_referrers", artifactType, path.Join(components...), "link"), nil
default:
// TODO(sday): This is an internal error. Ensure it doesn't escape (panic?).
return "", fmt.Errorf("unknown path spec: %#v", v)
@ -450,6 +468,17 @@ type repositoriesRootPathSpec struct{}
func (repositoriesRootPathSpec) pathSpec() {}
// subjectReferrerLinkPathSpec returns the describes the link of a subject to
// its referrers
type subjectReferrerLinkPathSpec struct {
name string
referrer digest.Digest
subject digest.Digest
mediaType string
}
func (subjectReferrerLinkPathSpec) pathSpec() {}
// digestPathComponents provides a consistent path breakdown for a given
// digest. For a generic digest, it will be as follows:
//

35
registry/storage/references.go Normal file
View File

@ -0,0 +1,35 @@
package storage
import (
"context"
"github.com/distribution/distribution/v3"
"github.com/opencontainers/go-digest"
)
// ReferenceService is a service to manage internal links from subjects back to
// their referrers.
type ReferenceService interface {
// Link creates a link from a subject back to a referrer
Link(ctx context.Context, mediaType string, referrer, subject digest.Digest) error
}
type referenceHandler struct {
*blobStore
repository distribution.Repository
pathFn func(name, mediaType string, reference, artifact_subject_must_be_manifest digest.Digest) (string, error)
}
func (r *referenceHandler) Link(ctx context.Context, artifactType string, referrer, subject digest.Digest) error {
path, err := r.pathFn(r.repository.Named().Name(), artifactType, referrer, subject)
if err != nil {
return err
}
return r.blobStore.link(ctx, path, referrer)
}
// subjectReferrerLinkPath provides the path to the subject's referrer link
func subjectReferrerLinkPath(name, mediaType string, referrer, subject digest.Digest) (string, error) {
return pathFor(subjectReferrerLinkPathSpec{name: name, mediaType: mediaType, referrer: referrer, subject: subject})
}

5
registry/storage/registry.go
View File

@ -305,6 +305,11 @@ func (repo *repository) Manifests(ctx context.Context, options ...distribution.M
repository: repo,
blobStore: blobStore,
manifestURLs: repo.registry.manifestURLs,
references: &referenceHandler{
blobStore: repo.blobStore,
repository: repo,
pathFn: subjectReferrerLinkPath,
},
},
ocischemaIndexHandler: &ocischemaIndexHandler{
manifestListHandler: manifestListHandler,

26
testutil/tarfile.go
View File

@ -114,3 +114,29 @@ func UploadBlobs(repository distribution.Repository, layers map[digest.Digest]io
}
return nil
}
// SeekerLen returns the apparent size of s
func SeekerLen(s io.Seeker) (int64, error) {
offset, err := s.Seek(0, io.SeekCurrent)
if err != nil {
return 0, fmt.Errorf("failed to read initial offset: %w", err)
}
size, err := s.Seek(0, io.SeekEnd)
if err != nil {
return 0, fmt.Errorf("failed to read size: %w", err)
}
_, err = s.Seek(offset, io.SeekStart)
if err != nil {
return 0, fmt.Errorf("failed to restore initial offset: %w", err)
}
return size, nil
}
// MustSeekerLen returns the apparent size of s or panics
func MustSeekerLen(s io.Seeker) int64 {
size, err := SeekerLen(s)
if err != nil {
panic(err)
}
return size
}