1 files changed, 48 insertions, 1 deletions
diff --git a/internal/cvss/v2vector.go b/internal/cvss/v2vector.go
index 909bca6..b1fca1f 100644
--- a/internal/cvss/v2vector.go
+++ b/internal/cvss/v2vector.go
@@ -1,6 +1,8 @@
 package cvss
 
 import (
+  // "encoding/json"
+  "regexp"
   "strings"
 )
 
@@ -40,7 +42,7 @@ func (v v2Vector) Metrics() []Metric {
 }
 
 // Create CVSS 2.0 vector from string.
-func newV2Vector(s string) (Vector, error) {
+func newV2Vector(s string) (v2Vector, error) {
   strs := strings.Split(s, "/")
   r := make([]v2Metric, len(strs))
 
@@ -59,3 +61,48 @@ func newV2Vector(s string) (Vector, error) {
   // build and return vector
   return v2Vector(r), nil
 }
+
+// // Unmarshal CVSS 2.0 vector from JSON string.
+// func (me *v2Vector) UnmarshalJSON(b []byte) error {
+//   // decode string, check for error
+//   var s string
+//   if err := json.Unmarshal(b, &s); err != nil {
+//     return err
+//   }
+// 
+//   // parse vector, check for error
+//   r, err := newV2Vector(s)
+//   if err != nil {
+//     // return error
+//     return err
+//   }
+// 
+//   // save result, return success
+//   *me = r
+//   return nil
+// }
+
+var v2MetricRe = "(?:" + strings.Join([]string {
+  "(?:AV:[NAL])",
+  "(?:AC:[LMH])",
+  "(?:Au:[MSN])",
+  "(?:C:[NPC])",
+  "(?:I:[NPC])",
+  "(?:A:[NPC])",
+  "(?:E:(?:ND|U|POC|F|H))",
+  "(?:RL:(?:OF|TF|W|U|ND))",
+  "(?:RC:(?:UC|UR|C|ND))",
+  "(?:CDP:(?:N|L|LM|MH|H|ND))",
+  "(?:TD:(?:N|L|M|H|ND))",
+  "(?:CR:(?:L|M|H|ND))",
+  "(?:IR:(?:L|M|H|ND))",
+}, "|") + ")"
+
+var v2VecRe = regexp.MustCompile(
+  "\\A" + v2MetricRe + "(?:/" + v2MetricRe + ")*\\z",
+)
+
+// Is the given string a CVSS v2 vector string?
+func isV2VectorString(s string) bool {
+  return len(s) > 0 && v2VecRe.MatchString(s)
+}