Fix #736 (#738)

Author: Yiwei-Ding

analyzer.go

@@ -319,16 +319,16 @@ func (gosec *Analyzer) ignore(n ast.Node) map[string]SuppressionInfo {
 		}
 
 		for _, group := range groups {
-
-			foundDefaultTag := strings.HasPrefix(group.Text(), noSecDefaultTag)
-			foundAlternativeTag := strings.HasPrefix(group.Text(), noSecAlternativeTag)
+			comment := strings.TrimSpace(group.Text())
+			foundDefaultTag := strings.HasPrefix(comment, noSecDefaultTag)
+			foundAlternativeTag := strings.HasPrefix(comment, noSecAlternativeTag)
 
 			if foundDefaultTag || foundAlternativeTag {
 				gosec.stats.NumNosec++
 
 				// Extract the directive and the justification.
 				justification := ""
-				commentParts := regexp.MustCompile(`-{2,}`).Split(group.Text(), 2)
+				commentParts := regexp.MustCompile(`-{2,}`).Split(comment, 2)
 				directive := commentParts[0]
 				if len(commentParts) > 1 {
 					justification = strings.TrimSpace(strings.TrimRight(commentParts[1], "\n"))

analyzer_test.go

@@ -139,7 +139,7 @@ var _ = Describe("Analyzer", func() {
 			}
 		})
 
-		It("should not report errors when a nosec comment is present", func() {
+		It("should not report errors when a nosec line comment is present", func() {
 			sample := testutils.SampleCodeG401[0]
 			source := sample.Code[0]
 			analyzer.LoadRules(rules.Generate(false, rules.NewRuleFilter(false, "G401")).RulesInfo())
@@ -156,6 +156,23 @@ var _ = Describe("Analyzer", func() {
 			Expect(nosecIssues).Should(BeEmpty())
 		})
 
+		It("should not report errors when a nosec block comment is present", func() {
+			sample := testutils.SampleCodeG401[0]
+			source := sample.Code[0]
+			analyzer.LoadRules(rules.Generate(false, rules.NewRuleFilter(false, "G401")).RulesInfo())
+
+			nosecPackage := testutils.NewTestPackage()
+			defer nosecPackage.Close()
+			nosecSource := strings.Replace(source, "h := md5.New()", "h := md5.New() /* #nosec */", 1)
+			nosecPackage.AddFile("md5.go", nosecSource)
+			err := nosecPackage.Build()
+			Expect(err).ShouldNot(HaveOccurred())
+			err = analyzer.Process(buildTags, nosecPackage.Path)
+			Expect(err).ShouldNot(HaveOccurred())
+			nosecIssues, _, _ := analyzer.Report()
+			Expect(nosecIssues).Should(BeEmpty())
+		})
+
 		It("should not report errors when an exclude comment is present for the correct rule", func() {
 			// Rule for MD5 weak crypto usage
 			sample := testutils.SampleCodeG401[0]