Add glide.yaml and vendor deps

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

@@ -0,0 +1,28 @@
+// Policy evaluation for the various simple PolicyRequirement types.
+
+package signature
+
+import (
+	"fmt"
+
+	"github.com/containers/image/transports"
+	"github.com/containers/image/types"
+)
+
+func (pr *prInsecureAcceptAnything) isSignatureAuthorAccepted(image types.UnparsedImage, sig []byte) (signatureAcceptanceResult, *Signature, error) {
+	// prInsecureAcceptAnything semantics: Every image is allowed to run,
+	// but this does not consider the signature as verified.
+	return sarUnknown, nil, nil
+}
+
+func (pr *prInsecureAcceptAnything) isRunningImageAllowed(image types.UnparsedImage) (bool, error) {
+	return true, nil
+}
+
+func (pr *prReject) isSignatureAuthorAccepted(image types.UnparsedImage, sig []byte) (signatureAcceptanceResult, *Signature, error) {
+	return sarRejected, nil, PolicyRequirementError(fmt.Sprintf("Any signatures for image %s are rejected by policy.", transports.ImageName(image.Reference())))
+}
+
+func (pr *prReject) isRunningImageAllowed(image types.UnparsedImage) (bool, error) {
+	return false, PolicyRequirementError(fmt.Sprintf("Running image %s is rejected by policy.", transports.ImageName(image.Reference())))
+}