1 files changed, 12 insertions, 3 deletions

diff --git a/plugins/sslutils.c b/plugins/sslutils.c
index 4f9c793..b412ef3 100644
--- a/plugins/sslutils.c
+++ b/plugins/sslutils.c
@@ -197,6 +197,7 @@ int np_net_ssl_check_cert(int days_till_exp_warn, int days_till_exp_crit){
         X509_NAME *subj=NULL;
         char timestamp[50] = "";
         char cn[MAX_CN_LENGTH]= "";
+        char *tz;
         
         int cnlen =-1;
         int status=STATE_UNKNOWN;
@@ -264,10 +265,18 @@ int np_net_ssl_check_cert(int days_till_exp_warn, int days_till_exp_crit){
                 (tm->data[10 + offset] - '0') * 10 + (tm->data[11 + offset] - '0');
         stamp.tm_isdst = -1;
 
-        time_left = difftime(timegm(&stamp), time(NULL));
+        tm_t = timegm(&stamp);
+        time_left = difftime(tm_t, time(NULL));
         days_left = time_left / 86400;
-        tm_t = mktime (&stamp);
-        strftime(timestamp, 50, "%c", localtime(&tm_t));
+        tz = getenv("TZ");
+        setenv("TZ", "GMT", 1);
+        tzset();
+        strftime(timestamp, 50, "%c %z", localtime(&tm_t));
+        if (tz)
+                setenv("TZ", tz, 1);
+        else
+                unsetenv("TZ");
+        tzset();
 
         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);