feat(java): add support PAR files (fanal#373)

Author: DmitriyLewen

analyzer/language/java/jar/jar.go

@@ -20,16 +20,16 @@ func init() {
 
 const version = 1
 
-var requiredExtensions = []string{".jar", ".war", ".ear"}
+var requiredExtensions = []string{".jar", ".war", ".ear", ".par"}
 
-// javaLibraryAnalyzer analyzes jar/war/ear files
+// javaLibraryAnalyzer analyzes jar/war/ear/par files
 type javaLibraryAnalyzer struct{}
 
 func (a javaLibraryAnalyzer) Analyze(_ context.Context, input analyzer.AnalysisInput) (*analyzer.AnalysisResult, error) {
 	libs, err := jar.Parse(input.Content, input.Info.Size(),
 		jar.WithFilePath(input.FilePath), jar.WithOffline(input.Options.Offline))
 	if err != nil {
-		return nil, xerrors.Errorf("jar/war/ear parse error: %w", err)
+		return nil, xerrors.Errorf("jar/war/ear/par parse error: %w", err)
 	}
 
 	return language.ToAnalysisResult(types.Jar, input.FilePath, input.FilePath, libs), nil

analyzer/language/java/jar/jar_test.go

@@ -20,7 +20,7 @@ func Test_javaLibraryAnalyzer_Analyze(t *testing.T) {
 		wantErr   string
 	}{
 		{
-			name:      "happy path",
+			name:      "happy path (WAR file)",
 			inputFile: "testdata/test.war",
 			want: &analyzer.AnalysisResult{
 				Applications: []types.Application{
@@ -41,6 +41,21 @@ func Test_javaLibraryAnalyzer_Analyze(t *testing.T) {
 				},
 			},
 		},
+		{
+			name:      "happy path (PAR file)",
+			inputFile: "testdata/test.par",
+			want: &analyzer.AnalysisResult{
+				Applications: []types.Application{
+					{
+						Type:     types.Jar,
+						FilePath: "testdata/test.par",
+						Libraries: []types.Package{
+							{Name: "com.fasterxml.jackson.core:jackson-core", FilePath: "testdata/test.par", Version: "2.9.10"},
+						},
+					},
+				},
+			},
+		},
 		{
 			name:      "sad path",
 			inputFile: "testdata/test.txt",