Visual Basic 6.0

Convert ASN.1 to/from Binary DER, XML, and Base64

Demonstrates how to convert ASN.1 from and to any of the following formats: binary DER, Base64, and XML. Visual Basic 6.0

Dim success As Long
success = 0

Dim asn As New ChilkatAsn

' Begin with loading ASN.1 from a binary DER/BER format file.
success = asn.LoadBinaryFile("/Users/chilkat/testData/p7b/test.p7b")
If (success <> 1) Then
    Debug.Print asn.LastErrorText
    Exit Sub
End If

' Convert ASN.1 to XML:
Dim strXml As String
strXml = asn.AsnToXml()
If (asn.LastMethodSuccess <> 1) Then
    Debug.Print asn.LastErrorText
    Exit Sub
End If

' The XML returned by AsnToXml will be compact and not pretty-formatted.
' Use Chilkat XML to format the XML better:
Dim xml As New ChilkatXml
success = xml.LoadXml(strXml)
' Assuming success for this example..
' This is formatted better for human viewing:
Debug.Print xml.GetXml()

' Now get the ASN.1 in base64 format.  Any encoding supported
' by Chilkat can be passed, such as "hex", "uu", "quoted-printable", "base32", "modbase64", etc.
Dim strBase64 As String
strBase64 = asn.GetEncodedDer("base64")

' Load the ASN.1 from XML:
Dim asn2 As New ChilkatAsn
success = asn2.LoadAsnXml(xml.GetXml())
If (success <> 1) Then
    Debug.Print asn2.LastErrorText
    Exit Sub
End If

' Load the ASN.1 from an encoded string, such as base64:
Dim asn3 As New ChilkatAsn
success = asn3.LoadEncoded(strBase64,"base64")
If (success <> 1) Then
    Debug.Print asn3.LastErrorText
    Exit Sub
End If