(VBScript) Convert DSA PEM Private Key to DER

Converts a DSA private key from PEM format to DER. The first part of the example will convert an unencrypted PEM to DER, then 2nd part will convert an encrypted PEM to unencrypted DER.

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)

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

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

' Load a PEM private key.

pemPrivateKey = dsa.LoadText("dsa_priv.pem")
' Import the unencrypted PEM into the DSA object.
success = dsa.FromPem(pemPrivateKey)
If (success <> 1) Then
    outFile.WriteLine(dsa.LastErrorText)
    WScript.Quit
End If

' Write it out as a DER file:
success = dsa.ToDerFile("dsa_priv.der")
If (success <> 1) Then
    outFile.WriteLine(dsa.LastErrorText)
    WScript.Quit
End If

' Load an encrypted PEM private key.
pemPrivateKey = dsa.LoadText("dsa_privEncrypted.pem")
' Import the encrypted PEM into the DSA object.
success = dsa.FromEncryptedPem("myPassword",pemPrivateKey)
If (success <> 1) Then
    outFile.WriteLine(dsa.LastErrorText)
    WScript.Quit
End If

' Write it out as an unencrypted DER file:
success = dsa.ToDerFile("dsa_priv2.der")
If (success <> 1) Then
    outFile.WriteLine(dsa.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Finished!")

outFile.Close