AutoIt

Get Certificate CRL Distribution Points

See more Certificates Examples

Demonstrates how to get a certificate's CRL Distribution Points extension data (assuming it exists). In the vast majority of cases, there will be one CRL Distribution Point.

Note: This example requires Chilkat v9.5.0.76 or greater.

AutoIt

Local $bSuccess = False

$oCert = ObjCreate("Chilkat.Cert")

$bSuccess = $oCert.LoadFromFile("qa_data/certs/test_haswdt.cer")
If ($bSuccess <> True) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

;  Get the CRL Distribution Points extension, which is at OID 2.5.29.31
Local $sExtensionXmlStr = $oCert.GetExtensionAsXml("2.5.29.31")
If ($oCert.LastMethodSuccess = False) Then
    ConsoleWrite("Certificate does not have the CDP extension." & @CRLF)
    Exit
EndIf

$oXml = ObjCreate("Chilkat.Xml")
$oXml.LoadXml($sExtensionXmlStr)

;  See what we have..
ConsoleWrite($oXml.GetXml() & @CRLF)

;  We should get XML like this:

;  <?xml version="1.0" encoding="utf-8" ?>
;  <sequence>
;      <sequence>
;          <contextSpecific tag="0" constructed="1">
;              <contextSpecific tag="0" constructed="1">
;                  <contextSpecific tag="6" constructed="0">aHR0cDovL2NybC5jb21vZG9jYS5jb20vQ09NT0RPUlNBQ2xpZW50QXV0aGVudGljYXRpb25hbmRTZWN1
;  cmVFbWFpbENBLmNybA==</contextSpecific>
;              </contextSpecific>
;          </contextSpecific>
;      </sequence>
;  </sequence>
;  

;  Assuming there is one CRL Distribution Point...
$oSbDistPoint = ObjCreate("Chilkat.StringBuilder")
$bSuccess = $oXml.GetChildContentSb("sequence|contextSpecific|contextSpecific|contextSpecific",$oSbDistPoint)
If ($bSuccess = True) Then
    $oSbDistPoint.Decode("base64","utf-8")
    ConsoleWrite("CRL Distribution Point:  " & $oSbDistPoint.GetAsString() & @CRLF)
EndIf

;  Sample output:
;  CRL Distribution Point:  http://crl.comodoca.com/COMODORSAClientAuthenticationandSecureEmailCA.crl