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diff --git a/plugins/netutils.c b/plugins/netutils.c
index e3fbb3a..2678f91 100644
--- a/plugins/netutils.c
+++ b/plugins/netutils.c
@@ -281,6 +281,84 @@ int np_net_ssl_read(void *buf, int num){
281 return SSL_read(s, buf, num); 281 return SSL_read(s, buf, num);
282} 282}
283 283
284int np_net_ssl_check_cert(int days_till_exp){
285# ifdef USE_OPENSSL
286 X509 *certificate=NULL;
287 ASN1_STRING *tm;
288 int offset;
289 struct tm stamp;
290 int days_left;
291 char timestamp[17] = "";
292
293 certificate=SSL_get_peer_certificate(s);
294 if(! certificate){
295 printf (_("CRITICAL - Cannot retrieve server certificate.\n"));
296 return STATE_CRITICAL;
297 }
298
299 /* Retrieve timestamp of certificate */
300 tm = X509_get_notAfter (certificate);
301
302 /* Generate tm structure to process timestamp */
303 if (tm->type == V_ASN1_UTCTIME) {
304 if (tm->length < 10) {
305 printf (_("CRITICAL - Wrong time format in certificate.\n"));
306 return STATE_CRITICAL;
307 } else {
308 stamp.tm_year = (tm->data[0] - '0') * 10 + (tm->data[1] - '0');
309 if (stamp.tm_year < 50)
310 stamp.tm_year += 100;
311 offset = 0;
312 }
313 } else {
314 if (tm->length < 12) {
315 printf (_("CRITICAL - Wrong time format in certificate.\n"));
316 return STATE_CRITICAL;
317 } else {
318 stamp.tm_year =
319 (tm->data[0] - '0') * 1000 + (tm->data[1] - '0') * 100 +
320 (tm->data[2] - '0') * 10 + (tm->data[3] - '0');
321 stamp.tm_year -= 1900;
322 offset = 2;
323 }
324 }
325 stamp.tm_mon =
326 (tm->data[2 + offset] - '0') * 10 + (tm->data[3 + offset] - '0') - 1;
327 stamp.tm_mday =
328 (tm->data[4 + offset] - '0') * 10 + (tm->data[5 + offset] - '0');
329 stamp.tm_hour =
330 (tm->data[6 + offset] - '0') * 10 + (tm->data[7 + offset] - '0');
331 stamp.tm_min =
332 (tm->data[8 + offset] - '0') * 10 + (tm->data[9 + offset] - '0');
333 stamp.tm_sec = 0;
334 stamp.tm_isdst = -1;
335
336 days_left = (mktime (&stamp) - time (NULL)) / 86400;
337 snprintf
338 (timestamp, 17, "%02d/%02d/%04d %02d:%02d",
339 stamp.tm_mon + 1,
340 stamp.tm_mday, stamp.tm_year + 1900, stamp.tm_hour, stamp.tm_min);
341
342 if (days_left > 0 && days_left <= days_till_exp) {
343 printf (_("WARNING - Certificate expires in %d day(s) (%s).\n"), days_left, timestamp);
344 return STATE_WARNING;
345 } else if (days_left < 0) {
346 printf (_("CRITICAL - Certificate expired on %s.\n"), timestamp);
347 return STATE_CRITICAL;
348 } else if (days_left == 0) {
349 printf (_("WARNING - Certificate expires today (%s).\n"), timestamp);
350 return STATE_WARNING;
351 }
352
353 printf (_("OK - Certificate will expire on %s.\n"), timestamp);
354 X509_free (certificate);
355 return STATE_OK;
356# else /* ifndef USE_OPENSSL */
357 printf (_("WARNING - Plugin does not support checking certificates.\n"));
358 return STATE_WARNING;
359# endif /* USE_OPENSSL */
360}
361
284#endif /* HAVE_SSL */ 362#endif /* HAVE_SSL */
285 363
286int 364int