--- a/check_cert.pl	Mon Jan 07 13:07:28 2019 +0100
+++ b/check_cert.pl	Mon Jan 07 14:04:59 2019 +0100
@@ -22,7 +22,7 @@
 $opt_b = "/usr/bin/openssl";
 $opt_s = "md5WithRSAEncryption";
 
-my $revision = '1.2.2';
+my $revision = '1.2.3';
 
 Getopt::Long::Configure('bundling');
 GetOptions(
@@ -99,7 +99,7 @@
     while (<CERT>) {
         /unable to load certificate/ and $rc = 1 and last;
         /Signature\sAlgorithm:\s($opt_s)\s+$/ and $sig       = $1;
-        /^subject=\s.*CN=(.*)\s+$/            and $cn        = $1;
+        /^subject=\s?.*CN\s*=\s*(.*)\s+$/     and $cn        = $1;
         /^notAfter=(.*)\s+$/                  and $enddate   = $1;
         /^(SSL\sclient)\s:\sYes$/             and $cert_type = $1;
         /^(SSL\sserver)\s:\sYes$/             and $cert_type = $1;
@@ -125,7 +125,7 @@
               and print "CERT CRITICAL: unable to load certificate\n"
               and exit $ERRORS{"CRITICAL"};
             /Signature\sAlgorithm:\s($opt_s)\s+$/ and $sig       = $1;
-            /^subject=\s.*CN=(.*)\s+$/            and $cn        = $1;
+            /^subject=\s?.*CN\s*=\s*(.*)\s+$/     and $cn        = $1;
             /^notAfter=(.*)\s+$/                  and $enddate   = $1;
             /^(SSL\sclient)\s:\sYes$/             and $cert_type = $1;
             /^(SSL\sserver)\s:\sYes$/             and $cert_type = $1;