(VBScript) Generate RSA Key and return Base64 PKCS8 Private Key

Demonstrates how to generate a new 2048-bit RSA private key and returns the Base64 encoded PKCS8 representation of the private key.

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.Rsa")
set rsa = CreateObject("Chilkat.Rsa")

' Generate a 2048-bit key.  Chilkat RSA supports
' key sizes ranging from 512 bits to 8192 bits.
success = rsa.GenerateKey(2048)
If (success <> 1) Then
    outFile.WriteLine(rsa.LastErrorText)
    WScript.Quit
End If

' privKey is a Chilkat.PrivateKey
Set privKey = rsa.ExportPrivateKeyObj()

' Get the private key in PKCS8 Base64 format
privKeyPkcs8Base64 = privKey.GetPkcs8ENC("base64")

' The key in base64 format will start similar to this:
' MIIEvAIBADANBgkqhkiG9w0BA...
outFile.WriteLine(privKeyPkcs8Base64)

outFile.Close