1 files changed, 20 insertions, 0 deletions
diff --git a/internal/cvss/badkey.go b/internal/cvss/badkey.go
new file mode 100644
index 0000000..872a6d2
--- /dev/null
+++ b/internal/cvss/badkey.go
@@ -0,0 +1,20 @@
+// CVSS vector parser.
+package cvss
+
+import "fmt"
+
+// Bad metric key error.
+type badKey struct {
+  version Version
+  key string
+}
+
+// Create new bad key error.
+func newBadKey(version Version, key string) error {
+  return &badKey { version, key }
+}
+
+// Return printable error string
+func (e badKey) Error() string {
+  return fmt.Sprintf("invalid CVSS %s metric key: %s", e.version, e.key)
+}