add check scripts, improve code, add nosec tag.

Author: For-ACGN

check.bat

@@ -0,0 +1,4 @@
+golint -set_exit_status -min_confidence 0.3 ./...
+gocyclo -avg -over 15 .
+golangci-lint run ./...
+gosec -quiet ./...

check.sh

@@ -0,0 +1,4 @@
+golint -set_exit_status -min_confidence 0.3 ./...
+gocyclo -avg -over 15 .
+golangci-lint run ./...
+gosec -quiet ./...

http.go

@@ -40,7 +40,7 @@ func (h *httpHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	// prevent arbitrary file read
 	path := sections[2]
-	if strings.Index(path, "../") != -1 || strings.Index(path, "/..") != -1 {
+	if strings.Contains(path, "../") || strings.Contains(path, "/..") {
 		h.logger.Println("[warning]", "found slash in url:", r.RequestURI)
 		return
 	}

log4shell.go

@@ -98,12 +98,12 @@ func New(cfg *Config) (*Server, error) {
 		}
 		tlsConfig = &tls.Config{
 			Certificates: []tls.Certificate{*cert},
-		}
+		} // #nosec
 		enableTLS = true
 	} else if enableTLS {
 		tlsConfig = &tls.Config{
 			Certificates: []tls.Certificate{cfg.TLSCert},
-		}
+		} // #nosec
 	}
 
 	// generate random string and add it to the http handler

obfuscate.go

@@ -39,7 +39,7 @@ func Obfuscate(raw string) string {
 		// first select section length
 		// use 0-3 is used to prevent include special
 		// string like "jndi", "ldap" and "http"
-		size := rand.Intn(4)
+		size := rand.Intn(4) // #nosec
 		if size > remaining {
 			size = remaining
 		}
@@ -69,10 +69,10 @@ func Obfuscate(raw string) string {
 
 		// generate useless data before section
 		obfuscated.WriteString("${")
-		n := 1 + rand.Intn(3) // 1-3
+		n := 1 + rand.Intn(3) // 1-3 // #nosec
 		for i := 0; i < n; i++ {
-			front := randString(2 + rand.Intn(5))
-			end := randString(2 + rand.Intn(5))
+			front := randString(2 + rand.Intn(5)) // #nosec
+			end := randString(2 + rand.Intn(5))   // #nosec
 
 			obfuscated.WriteString(front)
 			if randBool() {

rand.go

@@ -10,13 +10,13 @@ func init() {
 }
 
 func randBool() bool {
-	return rand.Int63()%2 == 0
+	return rand.Int63()%2 == 0 // #nosec
 }
 
 func randString(n int) string {
 	str := make([]rune, n)
 	for i := 0; i < n; i++ {
-		s := ' ' + 1 + rand.Intn(90)
+		s := ' ' + 1 + rand.Intn(90) // #nosec
 		switch {
 		case s >= '0' && s <= '9':
 		case s >= 'A' && s <= 'Z':