(VBScript) Generate Brainpool EC Keys (BP256R1, BP384R1, BP512R1, ...)

Demonstrates how to generate brainpool EC keys.

The brainpool elliptic curve (EC) is a set of standardized elliptic curves defined for use in cryptographic applications. These curves are defined over finite fields and are widely used for implementing elliptic curve cryptography (ECC) algorithms.

The brainpool curves were developed by the brainpool project, a collaborative effort initiated by the German Federal Office for Information Security (BSI) to define standardized elliptic curves with well-established security properties.

Note: Requires Chilkat v9.5.0.98 or later.

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.

' Create a Fortuna PRNG and seed it with system entropy.
' This will be our source of random data for generating the brainpool EC private key.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Prng")
set fortuna = CreateObject("Chilkat.Prng")
entropy = fortuna.GetEntropy(32,"base64")
success = fortuna.AddEntropy(entropy,"base64")

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

' You can generate keys using any of the following brainpool EC curves:
' (case does not matter)  
' BP160R1
' BP192R1
' BP224R1
' BP256R1
' BP320R1
' BP384R1
' BP512R1

' privKey is a Chilkat.PrivateKey
Set privKey = ecc.GenEccKey("bp256r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    outFile.WriteLine(ecc.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(privKey.GetXml())

' Save the private key to PKCS8 encrypted PEM
' (The private key can be saved in a variety of different formats. See the online reference documentation.)
success = privKey.SavePkcs8EncryptedPemFile("pemPassword","c:/temp/qa_output/eccKey123.pem")
If (success <> 1) Then
    outFile.WriteLine(privKey.LastErrorText)
End If

' privKey is a Chilkat.PrivateKey
Set privKey = ecc.GenEccKey("bp160r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    outFile.WriteLine(ecc.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(privKey.GetXml())

' privKey is a Chilkat.PrivateKey
Set privKey = ecc.GenEccKey("bp192r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    outFile.WriteLine(ecc.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(privKey.GetXml())

' privKey is a Chilkat.PrivateKey
Set privKey = ecc.GenEccKey("bp224r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    outFile.WriteLine(ecc.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(privKey.GetXml())

' privKey is a Chilkat.PrivateKey
Set privKey = ecc.GenEccKey("bp320r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    outFile.WriteLine(ecc.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(privKey.GetXml())

' privKey is a Chilkat.PrivateKey
Set privKey = ecc.GenEccKey("bp384r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    outFile.WriteLine(ecc.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(privKey.GetXml())

' privKey is a Chilkat.PrivateKey
Set privKey = ecc.GenEccKey("bp512r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    outFile.WriteLine(ecc.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(privKey.GetXml())

outFile.WriteLine("Finished generating Brainpool EC keys.")

outFile.Close