sslutils: expire time in local timezone format

sshutils prints the expiry time of certificates in US format
this patch uses the strftime %c, I don't know how portable that is

Thanks to Neil Prockter.

Closes #1188
Closes #1161
Closes #977
Closes #976
Closes #975
Closes #840
Closes #382

1 files changed, 4 insertions, 5 deletions

diff --git a/plugins/sslutils.c b/plugins/sslutils.c
index 687bffb7..d0ae4741 100644
--- a/plugins/sslutils.c
+++ b/plugins/sslutils.c
@@ -153,7 +153,8 @@ int np_net_ssl_check_cert(int days_till_exp_warn, int days_till_exp_crit){
         struct tm stamp;
         float time_left;
         int days_left;
-        char timestamp[17] = "";
+        char timestamp[50] = "";
+        time_t tm_t;
 
         certificate=SSL_get_peer_certificate(s);
         if (!certificate) {
@@ -211,10 +212,8 @@ int np_net_ssl_check_cert(int days_till_exp_warn, int days_till_exp_crit){
 
         time_left = difftime(timegm(&stamp), time(NULL));
         days_left = time_left / 86400;
-        snprintf
-                (timestamp, 17, "%02d/%02d/%04d %02d:%02d",
-                 stamp.tm_mon + 1,
-                 stamp.tm_mday, stamp.tm_year + 1900, stamp.tm_hour, stamp.tm_min);
+        tm_t = mktime (&stamp);
+        strftime(timestamp, 50, "%c", localtime(&tm_t));
 
         if (days_left > 0 && days_left <= days_till_exp_warn) {
                 printf (_("%s - Certificate '%s' expires in %d day(s) (%s).\n"), (days_left>days_till_exp_crit)?"WARNING":"CRITICAL", cn, days_left, timestamp);