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clair: add the additional legacy empty layer (#24)

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This layer was used in docker prior to being able to support truly empty
layers. It is a 1k tarball of 0s.
This commit is contained in:
Jimmy Zelinskie 2017-04-21 15:38:05 -04:00 committed by Jess Frazelle
parent 11a291f744
commit ba12ae6e91
2 changed files with 13 additions and 1 deletions
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12
clair/types.go
View file

@ -1,10 +1,22 @@
package clair package clair
import "github.com/opencontainers/go-digest"
const ( const (
// EmptyLayerBlobSum is the blob sum of empty layers. // EmptyLayerBlobSum is the blob sum of empty layers.
EmptyLayerBlobSum = "sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4" EmptyLayerBlobSum = "sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4"
// LegacyEmptyLayerBlobSum is the blob sum of empty layers used by docker
// before it could support a truly empty layer.
LegacyEmptyLayerBlobSum = "sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef"
) )
// IsEmptyLayer determines whether the blob sum is one of the known empty
// layers.
func IsEmptyLayer(blobSum digest.Digest) bool {
return blobSum == EmptyLayerBlobSum || blobSum == LegacyEmptyLayerBlobSum
}
var ( var (
// Priorities are the vulnerability priority labels. // Priorities are the vulnerability priority labels.
Priorities = []string{"Unknown", "Negligible", "Low", "Medium", "High", "Critical", "Defcon1"} Priorities = []string{"Unknown", "Negligible", "Low", "Medium", "High", "Critical", "Defcon1"}

2
main.go
View file

@ -275,7 +275,7 @@ func main() {
// filter out the empty layers // filter out the empty layers
var filteredLayers []schema1.FSLayer var filteredLayers []schema1.FSLayer
for _, layer := range m.FSLayers { for _, layer := range m.FSLayers {
if layer.BlobSum != clair.EmptyLayerBlobSum { if !clair.IsEmptyLayer(layer.BlobSum) {
filteredLayers = append(filteredLayers, layer) filteredLayers = append(filteredLayers, layer)
} }
} }