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-rw-r--r--internal/cpe/binding.go118
-rw-r--r--internal/cpe/binding_test.go132
-rw-r--r--internal/cpe/cpe.go2
3 files changed, 251 insertions, 1 deletions
diff --git a/internal/cpe/binding.go b/internal/cpe/binding.go
new file mode 100644
index 0000000..8c51d7d
--- /dev/null
+++ b/internal/cpe/binding.go
@@ -0,0 +1,118 @@
+package cpe
+
+import (
+ "encoding/json"
+ "errors"
+ "fmt"
+ "strings"
+)
+
+// Common Platform Enumeration binding.
+type Binding struct {
+ Part Part // Part attribute (NISTIR7695 5.3.3.1).
+ Vendor AvString // Vendor attribute (NISTIR7695 5.3.3.2).
+ Product AvString // Product attribute (NISTIR7695 5.3.3.3).
+ Version AvString // Version attribute (NISTIR7695 5.3.3.4).
+ Update AvString // Update attribute (NISTIR7695 5.3.3.5).
+ Edition AvString // Edition attribute (NISTIR7695 5.3.3.6).
+ SwEdition AvString // Software edition attribute (NISTIR7695 5.3.3.7).
+ TargetSw AvString // Target software attribute (NISTIR7695 5.3.3.8).
+ TargetHw AvString // Target hardware attribute (NISTIR7695 5.3.3.9).
+ Lang AvString // Language attribute (NISTIR7695 5.3.3.10).
+ Other AvString // Other attribute (NISTIR7695 5.3.3.11).
+}
+
+// cpe 2.3 formatted string prefix
+var cpe23Prefix = "cpe:2.3:"
+
+// missing prefix error
+var missingPrefix = errors.New("missing CPE 2.3 prefix")
+
+// Create CPE 2.3 binding from formatted string.
+func NewBinding(s string) (Binding, error) {
+ // check prefix
+ if s[0:len(cpe23Prefix)] != cpe23Prefix {
+ return Binding{}, missingPrefix
+ }
+
+ // tokenize string, check for error
+ toks, err := tokenize([]byte(s[len(cpe23Prefix):]))
+ if err != nil {
+ return Binding{}, err
+ }
+
+ // check token count
+ if len(toks) != 11 {
+ err = fmt.Errorf("invalid attribute count: %d != 11", len(toks))
+ return Binding{}, err
+ }
+
+ // create part
+ part, err := newPart(toks[0])
+ if err != nil {
+ return Binding{}, err
+ }
+
+ // parse tokens into strings
+ strs := make([]AvString, len(toks) - 1)
+ for i, t := range(toks[1:]) {
+ if strs[i], err = newAvString(t); err != nil {
+ return Binding{}, err
+ }
+ }
+
+ // build and return result
+ return Binding {
+ Part: part,
+ Vendor: strs[0],
+ Product: strs[1],
+ Version: strs[2],
+ Update: strs[3],
+ Edition: strs[4],
+ Lang: strs[5],
+ SwEdition: strs[6],
+ TargetSw: strs[7],
+ TargetHw: strs[8],
+ Other: strs[9],
+ }, nil
+}
+
+func (v Binding) String() string {
+ return cpe23Prefix + strings.Join([]string {
+ v.Part.String(),
+ v.Vendor.String(),
+ v.Product.String(),
+ v.Version.String(),
+ v.Update.String(),
+ v.Edition.String(),
+ v.Lang.String(),
+ v.SwEdition.String(),
+ v.TargetSw.String(),
+ v.TargetHw.String(),
+ v.Other.String(),
+ }, ":")
+}
+
+// Unmarshal CPE formatted string from JSON string.
+func (me *Binding) UnmarshalJSON(b []byte) error {
+ // decode json string
+ var s string
+ if err := json.Unmarshal(b, &s); err != nil {
+ return err
+ }
+
+ // create binding
+ binding, err := NewBinding(s)
+ if err != nil {
+ return err
+ }
+
+ // save result, return success
+ *me = binding
+ return nil
+}
+
+// Marshal CPE formatted string as JSON string.
+func (v Binding) MarshalJSON() ([]byte, error) {
+ return json.Marshal(v.String())
+}
diff --git a/internal/cpe/binding_test.go b/internal/cpe/binding_test.go
new file mode 100644
index 0000000..7c5154a
--- /dev/null
+++ b/internal/cpe/binding_test.go
@@ -0,0 +1,132 @@
+package cpe
+
+import (
+ "encoding/json"
+ "testing"
+)
+
+func TestNewBinding(t *testing.T) {
+ passTests := []string {
+ "cpe:2.3:o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*",
+ }
+
+ for _, val := range(passTests) {
+ t.Run(val, func(t *testing.T) {
+ if _, err := NewBinding(val); err != nil {
+ t.Error(err)
+ }
+ })
+ }
+
+ failTests := []struct {
+ val string
+ exp string
+ } {{
+ val: "o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*",
+ exp: "missing CPE 2.3 prefix",
+ }, {
+ val: "cpe:2.3:\n",
+ exp: "invalid byte: 0x0a",
+ }, {
+ val: "cpe:2.3:o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*",
+ exp: "invalid attribute count: 10 != 11",
+ }, {
+ val: "cpe:2.3:foo:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*",
+ exp: "unknown part: \"foo\"",
+ }}
+
+ for _, test := range(failTests) {
+ t.Run(test.val, func(t *testing.T) {
+ got, err := NewBinding(test.val)
+ if err == nil {
+ t.Errorf("got %v, exp error", got)
+ } else if err.Error() != test.exp {
+ t.Errorf("got \"%s\", exp \"%s\"", err.Error(), test.exp)
+ }
+ })
+ }
+}
+
+func TestBindingString(t *testing.T) {
+ tests := []string {
+ "cpe:2.3:o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*",
+ }
+
+ for _, val := range(tests) {
+ t.Run(val, func(t *testing.T) {
+ if got, err := NewBinding(val); err != nil {
+ t.Error(err)
+ } else if got.String() != val {
+ t.Errorf("got \"%s\", exp \"%s\"", got.String(), val)
+ }
+ })
+ }
+}
+
+func TestBindingUnmarshalJSON(t *testing.T) {
+ passTests := []string {
+ `"cpe:2.3:o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*"`,
+ }
+
+ for _, val := range(passTests) {
+ t.Run(val, func(t *testing.T) {
+ var b Binding
+ if err := json.Unmarshal([]byte(val), &b); err != nil {
+ t.Error(err)
+ }
+ })
+ }
+
+ failTests := []struct {
+ val string
+ exp string
+ } {{
+ val: `"o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*`,
+ exp: "unexpected end of JSON input",
+ }, {
+ val: `"o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*"`,
+ exp: "missing CPE 2.3 prefix",
+ }}
+
+ for _, test := range(failTests) {
+ t.Run(test.val, func(t *testing.T) {
+ var got Binding
+ if err := json.Unmarshal([]byte(test.val), &got); err == nil {
+ t.Errorf("got %v, exp error", got)
+ } else if err.Error() != test.exp {
+ t.Errorf("got \"%s\", exp \"%s\"", err.Error(), test.exp)
+ }
+ })
+ }
+}
+
+func TestBindingMarshalJSON(t *testing.T) {
+ tests := []string {
+ "cpe:2.3:o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*",
+ }
+
+ for _, val := range(tests) {
+ t.Run(val, func(t *testing.T) {
+ // create binding, check for error
+ b, err := NewBinding(val)
+ if err != nil {
+ t.Error(err)
+ return
+ }
+
+ // marshal json, check for error
+ got, err := json.Marshal(b)
+ if err != nil {
+ t.Error(err)
+ return
+ }
+
+ // build/check expected value
+ exp := "\"" + val + "\""
+ if string(got) != exp {
+ t.Errorf("got \"%s\", exp \"%s\"", string(got), exp)
+ return
+ }
+ })
+ }
+}
diff --git a/internal/cpe/cpe.go b/internal/cpe/cpe.go
index 331f315..dc38419 100644
--- a/internal/cpe/cpe.go
+++ b/internal/cpe/cpe.go
@@ -1,5 +1,5 @@
// CPE 2.3 formatted string parser.
//
-// Source: NISTIR 7605, figure 6-3:
+// Source: NISTIR 7695, figure 6-3:
// https://nvlpubs.nist.gov/nistpubs/Legacy/IR/nistir7695.pdf
package cpe
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 11:51:45 +0000