(MFC) Convert CRL PEM to XML

Loads a CRL (Certificate Revocation List) from the PEM file format and converts to XML to allow for visual examination and parsing.

Note: This example requires Chilkat v9.5.0.77 or greater.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkPem.h>
#include <CkAsn.h>
#include <CkXml.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // This example requires Chilkat v9.5.0.77 or greater.
    CkPem pem;

    pem.put_VerboseLogging(true);
    bool success = pem.LoadPemFile("qa_data/crl/sampleCrl.pem","password_not_used");
    if (success != true) {
        strOut.append(pem.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    int numCrls = pem.get_NumCrls();
    int i = 0;

    CkAsn asn;
    CkXml xml;
    while (i < numCrls) {

        // Get the CRL as base64 (multi-line)
        const char *crlBase64 = pem.getEncodedItem("crl","","base64_mime",i);
        if (pem.get_LastMethodSuccess() != true) {
            strOut.append(pem.lastErrorText());
            strOut.append("\r\n");
            SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
            return;
        }

        strOut.append(crlBase64);
        strOut.append("\r\n");

        success = asn.LoadEncoded(crlBase64,"base64");
        if (success != true) {
            strOut.append(asn.lastErrorText());
            strOut.append("\r\n");
            SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
            return;
        }

        // Convert ASN.1 to XML and load into xml and re-emit for pretty printing..
        xml.LoadXml(asn.asnToXml());
        strOut.append(xml.getXml());
        strOut.append("\r\n");

        // Use this online tool to generate parsing code from CRL XML: 
        // Generate Parsing Code from XML

        strOut.append("-------------------------------------");
        strOut.append("\r\n");
        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }