From 40951862e12fe8d9c2fd0ffd4f16e9fe4d951f33 Mon Sep 17 00:00:00 2001
From: William Ahern <william+netbsd@25tandclement.com>
Date: Fri, 12 Aug 2016 20:38:44 +0000
Subject: in bignum string conversion, don't pass char or signed char to
 isdigit or isxdigit

---
 src/openssl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/openssl.c b/src/openssl.c
index 22c6e85..d8eebb5 100644
--- a/src/openssl.c
+++ b/src/openssl.c
@@ -1861,13 +1861,13 @@ static BIGNUM *(checkbig)(lua_State *L, int index, _Bool *lvalue) {
 		if (hex) {
 			luaL_argcheck(L, len > 2+(size_t)neg, index, "invalid hex string");
 			for (i = 2+neg; i < len; i++) {
-				if (!isxdigit(str[i]))
+				if (!isxdigit((unsigned char)str[i]))
 					luaL_argerror(L, 1, "invalid hex string");
 			}
 		} else {
 			luaL_argcheck(L, len > neg, index, "invalid decimal string");
 			for (i = neg; i < len; i++) {
-				if (!isdigit(str[i]))
+				if (!isdigit((unsigned char)str[i]))
 					luaL_argerror(L, 1, "invalid decimal string");
 			}
 		}
-- 
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