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oci_image.go
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oci_image.go
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//
// Copyright 2024 The Chainloop 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 materials
import (
"context"
"fmt"
schemaapi "github.com/chainloop-dev/chainloop/app/controlplane/api/workflowcontract/v1"
api "github.com/chainloop-dev/chainloop/internal/attestation/crafter/api/attestation/v1"
"github.com/google/go-containerregistry/pkg/authn"
"github.com/google/go-containerregistry/pkg/name"
"github.com/google/go-containerregistry/pkg/v1/remote"
"github.com/rs/zerolog"
)
type OCIImageCrafter struct {
*crafterCommon
keychain authn.Keychain
}
func NewOCIImageCrafter(schema *schemaapi.CraftingSchema_Material, ociAuth authn.Keychain, l *zerolog.Logger) (*OCIImageCrafter, error) {
if schema.Type != schemaapi.CraftingSchema_Material_CONTAINER_IMAGE {
return nil, fmt.Errorf("material type is not container image")
}
craftCommon := &crafterCommon{logger: l, input: schema}
return &OCIImageCrafter{craftCommon, ociAuth}, nil
}
func (i *OCIImageCrafter) Craft(_ context.Context, imageRef string) (*api.Attestation_Material, error) {
i.logger.Debug().Str("name", imageRef).Msg("retrieving container image digest from remote")
ref, err := name.ParseReference(imageRef)
if err != nil {
return nil, err
}
descriptor, err := remote.Get(ref, remote.WithAuthFromKeychain(i.keychain))
if err != nil {
return nil, err
}
remoteRef := ref.Context().Digest(descriptor.Digest.String())
// FQDN of the repo, i.e bitnami/nginx => index.docker.io/bitnami/nginx
repoName := remoteRef.Repository.String()
i.logger.Debug().Str("name", repoName).Str("digest", remoteRef.DigestStr()).Msg("container image resolved")
return &api.Attestation_Material{
MaterialType: i.input.Type,
M: &api.Attestation_Material_ContainerImage_{
ContainerImage: &api.Attestation_Material_ContainerImage{
Id: i.input.Name, Name: repoName, Digest: remoteRef.DigestStr(), IsSubject: i.input.Output,
Tag: ref.Identifier(),
},
},
}, nil
}