(PowerBuilder) Generate an RSA Key and Get as Base64 DER

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER.

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

integer li_rc
oleobject loo_Rsa
integer li_Success
oleobject loo_PubKey
integer li_BChoosePkcs1
string ls_PubKeyBase64Der
oleobject loo_PrivKey
string ls_PrivKeyPkcs1
string ls_PrivKeyPkcs8

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

loo_Rsa = create oleobject
// Use "Chilkat_9_5_0.Rsa" for versions of Chilkat < 10.0.0
li_rc = loo_Rsa.ConnectToNewObject("Chilkat.Rsa")
if li_rc < 0 then
    destroy loo_Rsa
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Generate a 2048-bit key.  Chilkat RSA supports
li_Success = loo_Rsa.GenerateKey(2048)
if li_Success <> 1 then
    Write-Debug loo_Rsa.LastErrorText
    destroy loo_Rsa
    return
end if

// Get the public part of the key.
loo_PubKey = loo_Rsa.ExportPublicKeyObj()

// There are two possible formats for representing the RSA public key 
// in ASN.1 (DER).  The possible formats are PKCS1 and PKCS8.
// We can get either by setting bChoosePkcs1 to 1 or 0.
li_BChoosePkcs1 = 1
ls_PubKeyBase64Der = loo_PubKey.GetEncoded(li_BChoosePkcs1,"base64")
Write-Debug "Public Key Base64 DER:"
Write-Debug ls_PubKeyBase64Der

destroy loo_PubKey

// Now get the private key as Base64 DER:
// Get the private part of the key.
// (Note: A public key is actually just a subset of the private key.  
//  If you have the private key, you also have the public key.
//  Thus Chilkat provides a method to get the public key from the private key.)
loo_PrivKey = loo_Rsa.ExportPrivateKeyObj()

// Again, we can get PKCS1 or PKCS8, but with different methods:
ls_PrivKeyPkcs1 = loo_PrivKey.GetPkcs1ENC("base64")
Write-Debug "Private Key PKCS1 Base64 DER:"
Write-Debug ls_PrivKeyPkcs1

ls_PrivKeyPkcs8 = loo_PrivKey.GetPkcs8ENC("base64")
Write-Debug "Private Key PKCS8 Base64 DER:"
Write-Debug ls_PrivKeyPkcs8

destroy loo_PrivKey


destroy loo_Rsa