(VBScript) Get Text Certificate Extensions by OID

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Demonstrates how to get text certificate extensions by OID. In this example, we have a certificate with the following OID extensions: 1.3.6.1.4.1.49952.5.8.5, 1.3.6.1.4.1.49952.5.8.6, 1.3.6.1.4.1.49952.5.8.7.

Most certificate extensions have values that are ASN.1 (binary). For the majority of cases, an application should call GetExtensionAsXml. For extensions known to have text values (such as the OIDs listed above), an application can instead call GetExtensionAsText.

The GetExtensionAsText method is added in Chilkat v9.5.0.89.

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

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Cert")
set cert = CreateObject("Chilkat.Cert")

success = cert.LoadFromFile("qa_data/certs/PUH9.cer")
If (success = 0) Then
    outFile.WriteLine(cert.LastErrorText)
    WScript.Quit
End If

oid = "1.3.6.1.4.1.49952.5.8.5"
str = cert.GetExtensionAsText(oid)
If (cert.LastMethodSuccess = 1) Then
    outFile.WriteLine(oid & ": " & str)
End If

oid = "1.3.6.1.4.1.49952.5.8.6"
str = cert.GetExtensionAsText(oid)
If (cert.LastMethodSuccess = 1) Then
    outFile.WriteLine(oid & ": " & str)
End If

oid = "1.3.6.1.4.1.49952.5.8.7"
str = cert.GetExtensionAsText(oid)
If (cert.LastMethodSuccess = 1) Then
    outFile.WriteLine(oid & ": " & str)
End If


outFile.Close