(Go) Load .crl, Convert to XML, Get Revoked Serial Numbers and Dates

Load 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.

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

    // Load a binary .crl file.
    bdCrl := chilkat.NewBinData()
    success := bdCrl.LoadFile("qa_data/crl/ca1.crl")
    if success != true {
        fmt.Println("Failed to load CRL file.")
        bdCrl.DisposeBinData()
        return
    }

    asn := chilkat.NewAsn()
    success = asn.LoadBd(bdCrl)
    if success != true {
        fmt.Println(asn.LastErrorText())
        bdCrl.DisposeBinData()
        asn.DisposeAsn()
        return
    }

    // Convert ASN.1 to XML and load into xml and re-emit for pretty printing..
    xml := chilkat.NewXml()
    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
    var i int
    var count_i int
    var tagPath string
    var j int
    var count_j int
    var k int
    var count_k int

    var revokedCertSerialHex *string = new(string)
    var dateRevoked *string = new(string)

    dt := chilkat.NewCkDateTime()

    i = 0
    count_i = xml.NumChildrenHavingTag("sequence")
    for i < count_i {
        xml.SetI(i)

        j = 0
        count_j = xml.NumChildrenHavingTag("sequence[i]|sequence")
        for j < count_j {
            xml.SetJ(j)

            k = 0
            count_k = xml.NumChildrenHavingTag("sequence[i]|sequence[j]|sequence")
            for k < count_k {
                xml.SetK(k)

                // Get the revoked certificate's serial number in uppercase hex.
                revokedCertSerialHex = xml.GetChildContent("sequence[i]|sequence[j]|sequence[k]|int")
                fmt.Println("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)
                fmt.Println("date revoked: ", *dt.GetAsRfc822(false))

                k = k + 1
            }

            j = j + 1
        }

        i = i + 1
    }


    bdCrl.DisposeBinData()
    asn.DisposeAsn()
    xml.DisposeXml()
    dt.DisposeCkDateTime()