reference: use global defines for size limits

src/detect-reference.c

@@ -99,8 +99,8 @@ static DetectReference *DetectReferenceParse(const char *rawstr, DetectEngineCtx
 #define MAX_SUBSTRINGS 30
     int ret = 0, res = 0;
     int ov[MAX_SUBSTRINGS];
-    char key[64] = "";
-    char content[1024] = "";
+    char key[REFERENCE_SYSTEM_NAME_MAX] = "";
+    char content[REFERENCE_CONTENT_NAME_MAX] = "";
 
     ret = pcre_exec(parse_regex, parse_regex_study, rawstr, strlen(rawstr),
                     0, 0, ov, MAX_SUBSTRINGS);

src/util-reference-config.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2007-2010 Open Information Security Foundation
+/* Copyright (C) 2007-2019 Open Information Security Foundation
  *
  * You can copy, redistribute or modify this Program under the terms of
  * the GNU General Public License version 2 as published by the Free
@@ -244,8 +244,8 @@ static char *SCRConfStringToLowercase(const char *str)
  */
 static int SCRConfAddReference(char *rawstr, DetectEngineCtx *de_ctx)
 {
-    char system[64];
-    char url[1024];
+    char system[REFERENCE_SYSTEM_NAME_MAX];
+    char url[REFERENCE_CONTENT_NAME_MAX];
 
     SCRConfReference *ref_new = NULL;
     SCRConfReference *ref_lookup = NULL;

src/util-reference-config.h

@@ -24,6 +24,9 @@
 #ifndef __UTIL_REFERENCE_CONFIG_H__
 #define __UTIL_REFERENCE_CONFIG_H__
 
+#define REFERENCE_SYSTEM_NAME_MAX   64
+#define REFERENCE_CONTENT_NAME_MAX  1024
+
 /**
  * \brief Holds a reference from the file - reference.config.
  */