Enhance the cipher suite (#154)

Author: HarishH-DELL

internal/service/service.go

@@ -82,6 +82,8 @@ func (s *Service) Run() error {
 	config := &tls.Config{
 		Certificates: []tls.Certificate{cert},
 		MinVersion:   tls.VersionTLS12,
+		MaxVersion:   tls.VersionTLS13,
+		CipherSuites: GetSecuredCipherSuites(),
 	}
 
 	server := &http.Server{
@@ -326,3 +328,12 @@ func generateColumns(columns ...string) []map[string]string {
 	}
 	return result
 }
+
+// GetSecuredCipherSuites returns a set of secure cipher suites.
+func GetSecuredCipherSuites() (suites []uint16) {
+	securedSuite := tls.CipherSuites()
+	for _, v := range securedSuite {
+		suites = append(suites, v.ID)
+	}
+	return suites
+}

internal/service/service_test.go

@@ -18,6 +18,7 @@ package service_test
 
 import (
 	"bytes"
+	"crypto/tls"
 	"encoding/json"
 	"errors"
 	"io"
@@ -544,3 +545,23 @@ func TestHttpServerStartup(t *testing.T) {
 		})
 	}
 }
+
+func TestGetSecuredCipherSuites(t *testing.T) {
+	expectedSuites := tls.CipherSuites()
+	expectedIDs := make([]uint16, len(expectedSuites))
+	for i, suite := range expectedSuites {
+		expectedIDs[i] = suite.ID
+	}
+
+	got := service.GetSecuredCipherSuites()
+
+	if len(got) != len(expectedIDs) {
+		t.Fatalf("Expected %d cipher suites, but got %d", len(expectedIDs), len(got))
+	}
+
+	for i, id := range expectedIDs {
+		if got[i] != id {
+			t.Errorf("Expected cipher suite ID %x at index %d, but got %x", id, i, got[i])
+		}
+	}
+}