// // Copyright 2021 The Sigstore Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package empty import ( "errors" "fmt" "github.com/google/go-containerregistry/pkg/name" v1 "github.com/google/go-containerregistry/pkg/v1" "github.com/google/go-containerregistry/pkg/v1/empty" "github.com/sigstore/cosign/v2/pkg/oci" ) type signedImage struct { v1.Image digest v1.Hash signature oci.Signatures attestations oci.Signatures } func (se *signedImage) Signatures() (oci.Signatures, error) { return se.signature, nil } func (se *signedImage) Attestations() (oci.Signatures, error) { return se.attestations, nil } func (se *signedImage) Attachment(name string) (oci.File, error) { //nolint: revive return nil, errors.New("no attachments") } func (se *signedImage) Digest() (v1.Hash, error) { if se.digest.Hex == "" { return v1.Hash{}, fmt.Errorf("digest not available") } return se.digest, nil } func SignedImage(ref name.Reference) (oci.SignedImage, error) { var err error d := v1.Hash{} base := empty.Image if digest, ok := ref.(name.Digest); ok { d, err = v1.NewHash(digest.DigestStr()) if err != nil { return nil, err } } return &signedImage{ Image: base, digest: d, signature: Signatures(), attestations: Signatures(), }, nil }