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(.NET Core C#) Load .crl, Convert to XML, Get Revoked Serial Numbers and DatesLoad a binary .crl file (Certificate Revocation List), converts to XML, and then gets the revoked certificate serial numbers and revocation dates. Note: This example requires Chilkat v9.5.0.77 or greater.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Load a binary .crl file. Chilkat.BinData bdCrl = new Chilkat.BinData(); bool success = bdCrl.LoadFile("qa_data/crl/ca1.crl"); if (success != true) { Debug.WriteLine("Failed to load CRL file."); return; } Chilkat.Asn asn = new Chilkat.Asn(); success = asn.LoadBd(bdCrl); if (success != true) { Debug.WriteLine(asn.LastErrorText); return; } // Convert ASN.1 to XML and load into xml and re-emit for pretty printing.. Chilkat.Xml xml = new Chilkat.Xml(); xml.LoadXml(asn.AsnToXml()); success = xml.SaveXml("qa_output/crl.xml"); // Use this online tool to generate parsing code from CRL XML: // Generate Parsing Code from XML // Here's code to parse the XML. This code was generated by the above tool, // and then we modified it by removing unneeded code and changing some names int i; int count_i; string tagPath; int j; int count_j; int k; int count_k; string revokedCertSerialHex; string dateRevoked; Chilkat.CkDateTime dt = new Chilkat.CkDateTime(); i = 0; count_i = xml.NumChildrenHavingTag("sequence"); while (i < count_i) { xml.I = i; j = 0; count_j = xml.NumChildrenHavingTag("sequence[i]|sequence"); while (j < count_j) { xml.J = j; k = 0; count_k = xml.NumChildrenHavingTag("sequence[i]|sequence[j]|sequence"); while (k < count_k) { xml.K = k; // Get the revoked certificate's serial number in uppercase hex. revokedCertSerialHex = xml.GetChildContent("sequence[i]|sequence[j]|sequence[k]|int"); Debug.WriteLine("serial number: " + revokedCertSerialHex); // Get the date/time revoked. It will be a string formatted as "YYMMDDhhmmssZ", such as "181023093028Z" dateRevoked = xml.GetChildContent("sequence[i]|sequence[j]|sequence[k]|utctime"); // Starting in Chilkat v9.5.0.77, date/time strings formatted as YYMMDDhhmmssZ can be parsed as follows: dt.SetFromTimestamp(dateRevoked); Debug.WriteLine("date revoked: " + dt.GetAsRfc822(false)); k = k + 1; } j = j + 1; } i = i + 1; } |
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