Use ioutil.ReadFile()

main.go

@@ -53,25 +53,19 @@ func main() {
 		"file in which the hmac secret is stored")
 	flag.Parse()
 
-	// setup hmac secret from file
-	f, err := os.Open(*hmacSecretFile)
-	if err != nil {
-		log.Fatalf("unable to open secrets file: %v", err)
-	}
-	hmacSecret, err := ioutil.ReadAll(f)
+	hmacSecret, err := ioutil.ReadFile(*hmacSecretFile)
 	if err != nil {
 		log.Fatalf("unable to read HMAC secret: %v", err)
 	}
 
 	// warn if hmac file has insecure permissions
-	s, err := f.Stat()
+	s, err := os.Stat(*hmacSecretFile)
 	if err != nil {
 		log.Fatalf("unable to fstat secrets file: %v", err)
 	}
 	if s.Mode().Perm()&0077 != 0 {
 		log.Fatalf("insecure permissions of secrets file")
 	}
-	f.Close()
 
 	l, err := net.Listen("tcp", ":ident")
 	if err != nil {