Add glide.yaml and vendor deps

vendor/github.com/containers/image/signature/policy_reference_match.go

@@ -0,0 +1,78 @@
+// PolicyReferenceMatch implementations.
+
+package signature
+
+import (
+	"fmt"
+
+	"github.com/containers/image/docker/reference"
+	"github.com/containers/image/transports"
+	"github.com/containers/image/types"
+)
+
+// parseImageAndDockerReference converts an image and a reference string into two parsed entities, failing on any error and handling unidentified images.
+func parseImageAndDockerReference(image types.UnparsedImage, s2 string) (reference.Named, reference.Named, error) {
+	r1 := image.Reference().DockerReference()
+	if r1 == nil {
+		return nil, nil, PolicyRequirementError(fmt.Sprintf("Docker reference match attempted on image %s with no known Docker reference identity",
+			transports.ImageName(image.Reference())))
+	}
+	r2, err := reference.ParseNamed(s2)
+	if err != nil {
+		return nil, nil, err
+	}
+	return r1, r2, nil
+}
+
+func (prm *prmMatchExact) matchesDockerReference(image types.UnparsedImage, signatureDockerReference string) bool {
+	intended, signature, err := parseImageAndDockerReference(image, signatureDockerReference)
+	if err != nil {
+		return false
+	}
+	// Do not add default tags: image.Reference().DockerReference() should contain it already, and signatureDockerReference should be exact; so, verify that now.
+	if reference.IsNameOnly(intended) || reference.IsNameOnly(signature) {
+		return false
+	}
+	return signature.String() == intended.String()
+}
+
+func (prm *prmMatchRepository) matchesDockerReference(image types.UnparsedImage, signatureDockerReference string) bool {
+	intended, signature, err := parseImageAndDockerReference(image, signatureDockerReference)
+	if err != nil {
+		return false
+	}
+	return signature.Name() == intended.Name()
+}
+
+// parseDockerReferences converts two reference strings into parsed entities, failing on any error
+func parseDockerReferences(s1, s2 string) (reference.Named, reference.Named, error) {
+	r1, err := reference.ParseNamed(s1)
+	if err != nil {
+		return nil, nil, err
+	}
+	r2, err := reference.ParseNamed(s2)
+	if err != nil {
+		return nil, nil, err
+	}
+	return r1, r2, nil
+}
+
+func (prm *prmExactReference) matchesDockerReference(image types.UnparsedImage, signatureDockerReference string) bool {
+	intended, signature, err := parseDockerReferences(prm.DockerReference, signatureDockerReference)
+	if err != nil {
+		return false
+	}
+	// prm.DockerReference and signatureDockerReference should be exact; so, verify that now.
+	if reference.IsNameOnly(intended) || reference.IsNameOnly(signature) {
+		return false
+	}
+	return signature.String() == intended.String()
+}
+
+func (prm *prmExactRepository) matchesDockerReference(image types.UnparsedImage, signatureDockerReference string) bool {
+	intended, signature, err := parseDockerReferences(prm.DockerRepository, signatureDockerReference)
+	if err != nil {
+		return false
+	}
+	return signature.Name() == intended.Name()
+}