From a7dd84a94c8543ffa2dc044099cbcb731fca30d4 Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Sun, 1 Mar 2015 01:36:04 -0500
Subject: improve ALPN validation

---
 src/openssl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/openssl.c b/src/openssl.c
index ab19410..f9ff4d5 100644
--- a/src/openssl.c
+++ b/src/openssl.c
@@ -4537,7 +4537,7 @@ static int sx_setAlpnProtos(lua_State *L) {
 				return luaL_argerror(L, 2, "array of strings expected");
 		}
 		tmp = luaL_checklstring(L, -1, &len);
-		luaL_argcheck(L, len <= UCHAR_MAX, 2, "proto string too long");
+		luaL_argcheck(L, len > 0 && len <= UCHAR_MAX, 2, "proto string length invalid");
 		luaL_addchar(&B, (unsigned char)len);
 		luaL_addlstring(&B, tmp, len);
 		lua_pop(L, 1);
-- 
cgit v1.2.3-59-g8ed1b