working commit

app/operator/imgaux.go

@@ -0,0 +1,22 @@
+package operator
+
+import (
+	"encoding/hex"
+	"strings"
+)
+
+const sha256prefix = "sha256:"
+
+func stringLikeSHA256Digest(some string) bool {
+	if strings.HasPrefix(some, sha256prefix) {
+		some = strings.TrimPrefix(some, sha256prefix)
+	}
+	_, err := hex.DecodeString(some)
+	if err != nil {
+		return false
+	}
+	if len(some) == 64 {
+		return true
+	}
+	return false
+}