Visual Basic 6.0

Generate an RSA Key and Get as Base64 DER

See more RSA Examples

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER. Visual Basic 6.0

Dim success As Long
success = 0

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

Dim rsa As New ChilkatRsa

' Generate a 2048-bit key.
Dim privKey As New PrivateKey
success = rsa.GenKey(2048,privKey)
If (success = 0) Then
    Debug.Print rsa.LastErrorText
    Exit Sub
End If

' Get the public part of the key.
Dim pubKey As New PublicKey
success = privKey.ToPublicKey(pubKey)

' 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.
Dim bChoosePkcs1 As Long
bChoosePkcs1 = 1
Dim pubKeyBase64Der As String
pubKeyBase64Der = pubKey.GetEncoded(bChoosePkcs1,"base64")
Debug.Print "Public Key Base64 DER:"
Debug.Print pubKeyBase64Der

' Get the private key as Base64 DER:
' We can get PKCS1 or PKCS8, but with different methods:
Dim privKeyPkcs1 As String
privKeyPkcs1 = privKey.GetPkcs1ENC("base64")
Debug.Print "Private Key PKCS1 Base64 DER:"
Debug.Print privKeyPkcs1

Dim privKeyPkcs8 As String
privKeyPkcs8 = privKey.GetPkcs8ENC("base64")
Debug.Print "Private Key PKCS8 Base64 DER:"
Debug.Print privKeyPkcs8