From 9c17b97cd0f83be3fff9fa4e87fd1d29052ea616 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Fri, 4 Feb 2022 00:35:31 -0500
Subject: rename to github.com/pablotron/cvez, remove internal libs

---
 cvss/v2vector.go | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 cvss/v2vector.go

(limited to 'cvss/v2vector.go')

diff --git a/cvss/v2vector.go b/cvss/v2vector.go
new file mode 100644
index 0000000..b1fca1f
--- /dev/null
+++ b/cvss/v2vector.go
@@ -0,0 +1,108 @@
+package cvss
+
+import (
+  // "encoding/json"
+  "regexp"
+  "strings"
+)
+
+// CVSS 2.0 vector.
+type v2Vector []v2Metric
+
+// Convert vector to string.
+func (v v2Vector) String() string {
+  // convert to slice of metrics
+  metrics := []v2Metric(v)
+
+  // build vector
+  r := make([]string, len(metrics))
+  for i, m := range(metrics) {
+    r[i] = m.String()
+  }
+
+  // build and return string
+  return strings.Join(r, "/")
+}
+
+// Return CVSS version.
+func (v2Vector) Version() Version {
+  return V20
+}
+
+// Return metrics in this vector.
+func (v v2Vector) Metrics() []Metric {
+  // build result
+  r := make([]Metric, len(v))
+  for i, m := range(v) {
+    r[i] = m
+  }
+
+  // return result
+  return r
+}
+
+// Create CVSS 2.0 vector from string.
+func newV2Vector(s string) (v2Vector, error) {
+  strs := strings.Split(s, "/")
+  r := make([]v2Metric, len(strs))
+
+  // walk metric strings
+  for i, ms := range(strs) {
+    // convert string to vector
+    m, err := getV2Metric(ms)
+    if err != nil {
+      return nil, err
+    }
+
+    // add to results
+    r[i] = m
+  }
+
+  // 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)
+}
-- 
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