From 4f1ddfa66e476940dcffe3f9878c48be8d6eb22e Mon Sep 17 00:00:00 2001
From: Marco d'Itri <md@linux.it>
Date: Mon, 30 Dec 2019 05:59:36 +0100
Subject: [PATCH] mkpasswd: ignore a 0-bytes salt parameter

This also prevents a segmentation fault when
CRYPT_GENSALT_IMPLEMENTS_DEFAULT_PREFIX is used.

Closes #81 from Github.
---
 mkpasswd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mkpasswd.c b/mkpasswd.c
index d32391e..c85b1ed 100644
--- a/mkpasswd.c
+++ b/mkpasswd.c
@@ -282,7 +282,7 @@ int main(int argc, char *argv[])
     else
 	rounds_str[0] = '\0';
 
-    if (salt_arg) {
+    if (salt_arg && salt_arg[0] != '\0') {
 	unsigned int c = strlen(salt_arg);
 	if (c < salt_minlen || c > salt_maxlen) {
 	    if (salt_minlen == salt_maxlen)