(VB.NET) Get Certificate Subject Part by Name or OID

Demonstrates the GetSubjectPart method where a name or OID can be passed.

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Dim cert As New Chilkat.Cert

Dim success As Boolean = cert.LoadByCommonName("myCert")
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' This example demonstrates getting the SERIALNUMBER part of the subject,
' if one such part exists in the cert's subject.
' Not too many certicates include the serial number in the Subject.
' (Chilean issued certificates for SII is one such case where the SERIALNUMBER part exists within the Subject.)
Dim serialNum As String = cert.GetSubjectPart("SERIALNUMBER")
If (cert.LastMethodSuccess = False) Then
    Debug.WriteLine("No SERIALNUMBER part exists.")
    Exit Sub
End If


Debug.WriteLine(serialNum)

' We could also get the part by the OID.
' See https://oidref.com/2.5.4.5 for a list of OID's in the 2.5.4.* range..
' The OID for SERIALNUMBER is "2.5.4.5"
serialNum = cert.GetSubjectPart("2.5.4.5")
If (cert.LastMethodSuccess = False) Then
    Debug.WriteLine("No SERIALNUMBER part exists.")
    Exit Sub
End If


Debug.WriteLine(serialNum)