112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
package storage
|
|
|
|
import (
|
|
"encoding/json"
|
|
|
|
"github.com/docker/distribution"
|
|
"github.com/docker/distribution/context"
|
|
"github.com/docker/distribution/digest"
|
|
"github.com/docker/distribution/manifest"
|
|
"github.com/docker/libtrust"
|
|
)
|
|
|
|
// revisionStore supports storing and managing manifest revisions.
|
|
type revisionStore struct {
|
|
repository *repository
|
|
blobStore *linkedBlobStore
|
|
ctx context.Context
|
|
}
|
|
|
|
// get retrieves the manifest, keyed by revision digest.
|
|
func (rs *revisionStore) get(ctx context.Context, revision digest.Digest) (*manifest.SignedManifest, error) {
|
|
// Ensure that this revision is available in this repository.
|
|
_, err := rs.blobStore.Stat(ctx, revision)
|
|
if err != nil {
|
|
if err == distribution.ErrBlobUnknown {
|
|
return nil, distribution.ErrManifestUnknownRevision{
|
|
Name: rs.repository.Name(),
|
|
Revision: revision,
|
|
}
|
|
}
|
|
|
|
return nil, err
|
|
}
|
|
|
|
// TODO(stevvooe): Need to check descriptor from above to ensure that the
|
|
// mediatype is as we expect for the manifest store.
|
|
|
|
content, err := rs.blobStore.Get(ctx, revision)
|
|
if err != nil {
|
|
if err == distribution.ErrBlobUnknown {
|
|
return nil, distribution.ErrManifestUnknownRevision{
|
|
Name: rs.repository.Name(),
|
|
Revision: revision,
|
|
}
|
|
}
|
|
|
|
return nil, err
|
|
}
|
|
|
|
// Fetch the signatures for the manifest
|
|
signatures, err := rs.repository.Signatures().Get(revision)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
jsig, err := libtrust.NewJSONSignature(content, signatures...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Extract the pretty JWS
|
|
raw, err := jsig.PrettySignature("signatures")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var sm manifest.SignedManifest
|
|
if err := json.Unmarshal(raw, &sm); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &sm, nil
|
|
}
|
|
|
|
// put stores the manifest in the repository, if not already present. Any
|
|
// updated signatures will be stored, as well.
|
|
func (rs *revisionStore) put(ctx context.Context, sm *manifest.SignedManifest) (distribution.Descriptor, error) {
|
|
// Resolve the payload in the manifest.
|
|
payload, err := sm.Payload()
|
|
if err != nil {
|
|
return distribution.Descriptor{}, err
|
|
}
|
|
|
|
// Digest and store the manifest payload in the blob store.
|
|
revision, err := rs.blobStore.Put(ctx, manifest.ManifestMediaType, payload)
|
|
if err != nil {
|
|
context.GetLogger(ctx).Errorf("error putting payload into blobstore: %v", err)
|
|
return distribution.Descriptor{}, err
|
|
}
|
|
|
|
// Link the revision into the repository.
|
|
if err := rs.blobStore.linkBlob(ctx, revision); err != nil {
|
|
return distribution.Descriptor{}, err
|
|
}
|
|
|
|
// Grab each json signature and store them.
|
|
signatures, err := sm.Signatures()
|
|
if err != nil {
|
|
return distribution.Descriptor{}, err
|
|
}
|
|
|
|
if err := rs.repository.Signatures().Put(revision.Digest, signatures...); err != nil {
|
|
return distribution.Descriptor{}, err
|
|
}
|
|
|
|
return revision, nil
|
|
}
|
|
|
|
func (rs *revisionStore) delete(ctx context.Context, revision digest.Digest) error {
|
|
return rs.blobStore.Delete(ctx, revision)
|
|
}
|