(Visual Basic 6.0) 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

' 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.
Dim fortuna As New ChilkatPrng
Dim entropy As String
entropy = fortuna.GetEntropy(32,"base64")
Dim success As Long
success = fortuna.AddEntropy(entropy,"base64")

Dim ecc As New ChilkatEcc

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

Dim privKey As PrivateKey
Set privKey = ecc.GenEccKey("bp256r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

Debug.Print 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
    Debug.Print privKey.LastErrorText
End If

Set privKey = ecc.GenEccKey("bp160r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

Debug.Print privKey.GetXml()

Set privKey = ecc.GenEccKey("bp192r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

Debug.Print privKey.GetXml()

Set privKey = ecc.GenEccKey("bp224r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

Debug.Print privKey.GetXml()

Set privKey = ecc.GenEccKey("bp320r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

Debug.Print privKey.GetXml()

Set privKey = ecc.GenEccKey("bp384r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

Debug.Print privKey.GetXml()

Set privKey = ecc.GenEccKey("bp512r1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

Debug.Print privKey.GetXml()

Debug.Print "Finished generating Brainpool EC keys."