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82 lines
2.5 KiB
Go
82 lines
2.5 KiB
Go
package digestinfo
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import (
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"strings"
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"github.com/anuvu/zot/pkg/extensions/search/common"
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"github.com/anuvu/zot/pkg/log"
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"github.com/anuvu/zot/pkg/storage"
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ispec "github.com/opencontainers/image-spec/specs-go/v1"
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)
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// DigestInfo implements searching by manifes/config/layer digest.
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type DigestInfo struct {
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Log log.Logger
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LayoutUtils *common.OciLayoutUtils
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}
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// NewDigestInfo initializes a new DigestInfo object.
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func NewDigestInfo(storeController storage.StoreController, log log.Logger) *DigestInfo {
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layoutUtils := common.NewOciLayoutUtils(storeController, log)
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return &DigestInfo{Log: log, LayoutUtils: layoutUtils}
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}
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// FilterImagesByDigest returns a list of image tags in a repository matching a specific divest.
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func (digestinfo DigestInfo) GetImageTagsByDigest(repo string, digest string) ([]*string, error) {
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uniqueTags := []*string{}
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manifests, err := digestinfo.LayoutUtils.GetImageManifests(repo)
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if err != nil {
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digestinfo.Log.Error().Err(err).Msg("unable to read image manifests")
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return uniqueTags, err
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}
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for _, manifest := range manifests {
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imageDigest := manifest.Digest
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v, ok := manifest.Annotations[ispec.AnnotationRefName]
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if ok {
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imageBlobManifest, err := digestinfo.LayoutUtils.GetImageBlobManifest(repo, imageDigest)
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if err != nil {
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digestinfo.Log.Error().Err(err).Msg("unable to read image blob manifest")
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return uniqueTags, err
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}
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tags := []*string{}
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// Check the image manigest in index.json matches the search digest
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// This is a blob with mediaType application/vnd.oci.image.manifest.v1+json
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if strings.Contains(manifest.Digest.String(), digest) {
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tags = append(tags, &v)
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}
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// Check the image config matches the search digest
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// This is a blob with mediaType application/vnd.oci.image.config.v1+json
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if strings.Contains(imageBlobManifest.Config.Digest.Algorithm+":"+imageBlobManifest.Config.Digest.Hex, digest) {
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tags = append(tags, &v)
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}
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// Check to see if the individual layers in the oci image manifest match the digest
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// These are blobs with mediaType application/vnd.oci.image.layer.v1.tar+gzip
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for _, layer := range imageBlobManifest.Layers {
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if strings.Contains(layer.Digest.Algorithm+":"+layer.Digest.Hex, digest) {
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tags = append(tags, &v)
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}
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}
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keys := make(map[string]bool)
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for _, entry := range tags {
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if _, value := keys[*entry]; !value {
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uniqueTags = append(uniqueTags, entry)
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keys[*entry] = true
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}
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}
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}
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}
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return uniqueTags, nil
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}
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