diff --git a/phpseclib/File/ASN1.php b/phpseclib/File/ASN1.php
index 2fd2339e..7ce28bdd 100644
--- a/phpseclib/File/ASN1.php
+++ b/phpseclib/File/ASN1.php
@@ -1222,7 +1222,7 @@ class File_ASN1
            http://www.obj-sys.com/asn1tutorial/node14.html */
 
         $pattern = $tag == FILE_ASN1_TYPE_UTC_TIME ?
-            '#(..)(..)(..)(..)(..)(..)(.*)#' :
+            '#^(..)(..)(..)(..)(..)(..)?(.*)$#' :
             '#(....)(..)(..)(..)(..)(..).*([Z+-].*)$#';
 
         preg_match($pattern, $content, $matches);
@@ -1247,7 +1247,7 @@ class File_ASN1
             $timezone = 0;
         }
 
-        return @$mktime($hour, $minute, $second, $month, $day, $year) + $timezone;
+        return @$mktime((int)$hour, (int)$minute, (int)$second, (int)$month, (int)$day, (int)$year) + $timezone;
     }
 
     /**
diff --git a/tests/Unit/File/X509/X509Test.php b/tests/Unit/File/X509/X509Test.php
index 97bab856..81cd5480 100644
--- a/tests/Unit/File/X509/X509Test.php
+++ b/tests/Unit/File/X509/X509Test.php
@@ -416,4 +416,46 @@ Mj93S
 
         runkit_constant_remove('FILE_X509_IGNORE_TYPE');
     }
+
+    public function testUtcTimeWithoutSeconds()
+    {
+        $test = '-----BEGIN CERTIFICATE-----
+MIIGFDCCBPygAwIBAgIDKCHVMA0GCSqGSIb3DQEBBQUAMIHcMQswCQYDVQQGEwJVUzEQMA4GA1UE
+CBMHQXJpem9uYTETMBEGA1UEBxMKU2NvdHRzZGFsZTElMCMGA1UEChMcU3RhcmZpZWxkIFRlY2hu
+b2xvZ2llcywgSW5jLjE5MDcGA1UECxMwaHR0cDovL2NlcnRpZmljYXRlcy5zdGFyZmllbGR0ZWNo
+LmNvbS9yZXBvc2l0b3J5MTEwLwYDVQQDEyhTdGFyZmllbGQgU2VjdXJlIENlcnRpZmljYXRpb24g
+QXV0aG9yaXR5MREwDwYDVQQFEwgxMDY4ODQzNTAcFwsxNDAxMDcwMDAwWhcNMTYwNDAxMDcwMDAw
+WjCB6zETMBEGCysGAQQBgjc8AgEDEwJVUzEYMBYGCysGAQQBgjc8AgECEwdBcml6b25hMR0wGwYD
+VQQPExRQcml2YXRlIE9yZ2FuaXphdGlvbjEUMBIGA1UEBRMLUi0xNzI0NzQxLTYxCzAJBgNVBAYT
+AlVTMRAwDgYDVQQIEwdBcml6b25hMRMwEQYDVQQHEwpTY290dHNkYWxlMSQwIgYDVQQKExtTdGFy
+ZmllbGQgVGVjaG5vbG9naWVzLCBMTEMxKzApBgNVBAMTInZhbGlkLnNmaS5jYXRlc3Quc3RhcmZp
+ZWxkdGVjaC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCt1LHQOza9tkKxwGL+
+/yKi/Fe5HM0sjvcM4ic1XVrvpewa4P/04IzGSjIGO3CXaSArxQMSzsTt2dcO9tSJ1Zk8c9NZXM8e
+Vqx92iTMEf9OQcubWpzWmrPc3TAFhbVnfEmCptsXEgtxbAIbntrNeDk/hBPdl4DYFYRdm3ZTk4JM
+If/quDZe5Oti53J0UsxWXSSoqKyPNdb671Q+OTQfSDj7kVF4+Ri3FIeAV16d2UnpBW1bgNqA5yIT
+RskHE4bX98HDNHUTHioHpgA+fXfejWkGB/0FQN4HbZcysYHhf1L5cWBtz9w5J00YmjM5fzWvTc3U
+UF9ou7m7JE4aqEbNOWb9AgMBAAGjggHOMIIByjAMBgNVHRMBAf8EAjAAMA4GA1UdDwEB/wQEAwIF
+oDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwLQYDVR0RBCYwJIIidmFsaWQuc2ZpLmNh
+dGVzdC5zdGFyZmllbGR0ZWNoLmNvbTAdBgNVHQ4EFgQUcO+QEqZcHphPW9szww9ty+1AGmQwHwYD
+VR0jBBgwFoAUSUtSJ9EbvPKhIWpie1FCeorX1VYwOAYDVR0fBDEwLzAtoCugKYYnaHR0cDovL2Ny
+bC5zdGFyZmllbGR0ZWNoLmNvbS9zZnMzLTAuY3JsMIGNBggrBgEFBQcBAQSBgDB+MCoGCCsGAQUF
+BzABhh5odHRwOi8vb2NzcC5zdGFyZmllbGR0ZWNoLmNvbS8wUAYIKwYBBQUHMAKGRGh0dHA6Ly9j
+ZXJ0aWZpY2F0ZXMuc3RhcmZpZWxkdGVjaC5jb20vcmVwb3NpdG9yeS9zZl9pbnRlcm1lZGlhdGUu
+Y3J0MFIGA1UdIARLMEkwRwYLYIZIAYb9bgEHFwMwODA2BggrBgEFBQcCARYqaHR0cDovL2NlcnRz
+LnN0YXJmaWVsZHRlY2guY29tL3JlcG9zaXRvcnkvMA0GCSqGSIb3DQEBBQUAA4IBAQAViYkLUjQk
+xWRmZl4DutL0/9/wJSURcJ1qunLP+TImJFp0A9RE/MNKZOmQoAEoH6hMg7FL4etkvTcnruTdcx+3
+mvqYiECUiUEx6pkx3dmkYgZACEuk2nfyJ0MkV/zwzqmI8aV+kunpOQv93aePZbrBgaAzkE8jDlEx
+td7c4pE7JF40jxmvDwjZHwpyNDULreGtFBij7JcWJCfihM3uetqrao0kOoeih1PQyJXtz2RldhFY
+s6Jdk3ILYv+84t5UMO+aS9nVBXIcbgaGjIMZjHDgR/tE9FKFB66k8UTDzAwwEs38VV24zx6hlOzT
+F7xAUxmPUnNb2teatMf2Rmj0fs+d
+-----END CERTIFICATE-----
+';
+
+        $x509 = new File_X509();
+
+        $cert = $x509->loadX509($test);
+
+        $this->assertEquals($cert['tbsCertificate']['validity']['notBefore']['utcTime'], 'Tue, 07 Jan 2014 00:00:00 +0000');
+        $this->assertEquals($cert['tbsCertificate']['validity']['notAfter']['utcTime'], 'Fri, 01 Apr 2016 07:00:00 +0000');
+    }
 }