(PowerBuilder) 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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_BdCrl
integer li_Success
oleobject loo_Asn
oleobject loo_Xml
integer i
integer li_Count_i
string ls_TagPath
integer j
integer li_Count_j
integer k
integer li_Count_k
string ls_RevokedCertSerialHex
string ls_DateRevoked
oleobject loo_Dt

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

// Load a binary .crl file.
loo_BdCrl = create oleobject
// Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
li_rc = loo_BdCrl.ConnectToNewObject("Chilkat.BinData")
if li_rc < 0 then
    destroy loo_BdCrl
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_BdCrl.LoadFile("qa_data/crl/ca1.crl")
if li_Success <> 1 then
    Write-Debug "Failed to load CRL file."
    destroy loo_BdCrl
    return
end if

loo_Asn = create oleobject
// Use "Chilkat_9_5_0.Asn" for versions of Chilkat < 10.0.0
li_rc = loo_Asn.ConnectToNewObject("Chilkat.Asn")

li_Success = loo_Asn.LoadBd(loo_BdCrl)
if li_Success <> 1 then
    Write-Debug loo_Asn.LastErrorText
    destroy loo_BdCrl
    destroy loo_Asn
    return
end if

// Convert ASN.1 to XML and load into xml and re-emit for pretty printing..
loo_Xml = create oleobject
// Use "Chilkat_9_5_0.Xml" for versions of Chilkat < 10.0.0
li_rc = loo_Xml.ConnectToNewObject("Chilkat.Xml")

loo_Xml.LoadXml(loo_Asn.AsnToXml())
li_Success = loo_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

loo_Dt = create oleobject
// Use "Chilkat_9_5_0.CkDateTime" for versions of Chilkat < 10.0.0
li_rc = loo_Dt.ConnectToNewObject("Chilkat.CkDateTime")

i = 0
li_Count_i = loo_Xml.NumChildrenHavingTag("sequence")
do while i < li_Count_i
    loo_Xml.I = i

    j = 0
    li_Count_j = loo_Xml.NumChildrenHavingTag("sequence[i]|sequence")
    do while j < li_Count_j
        loo_Xml.J = j

        k = 0
        li_Count_k = loo_Xml.NumChildrenHavingTag("sequence[i]|sequence[j]|sequence")
        do while k < li_Count_k
            loo_Xml.K = k

            // Get the revoked certificate's serial number in uppercase hex.
            ls_RevokedCertSerialHex = loo_Xml.GetChildContent("sequence[i]|sequence[j]|sequence[k]|int")
            Write-Debug "serial number: " + ls_RevokedCertSerialHex

            // Get the date/time revoked.  It will be a string formatted as "YYMMDDhhmmssZ", such as "181023093028Z"
            ls_DateRevoked = loo_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:
            loo_Dt.SetFromTimestamp(ls_DateRevoked)
            Write-Debug "date revoked: " + loo_Dt.GetAsRfc822(0)

            k = k + 1
        loop
        j = j + 1
    loop
    i = i + 1
loop


destroy loo_BdCrl
destroy loo_Asn
destroy loo_Xml
destroy loo_Dt