CheckV2MetadataHMAC returns true if the given "meta" is tagged with a hmac hashed by the given "key".

ComputeV2MetadataHMAC returns a hmac for the given "meta" hash by the given key.

ComputeV2MetadataHMACKey returns a key for the given "authConfig" that can be used to hash v2 metadata entries.

NewFSMetadataStore creates a new filesystem-based metadata store.

NewV2MetadataService creates a new diff ID to v2 metadata mapping service.

FSMetadataStore uses the filesystem to associate metadata with layer and image IDs.

V2Metadata contains the digest and source repository information for a layer.

Store implements a K/V store for mapping distribution-related IDs to on-disk layer IDs and image IDs.

V2MetadataService maps layer IDs to a set of known metadata for the layer.