Generate RSA Public/Private Key Pair and Export to PEM

VB.NET example code showing how to generate an RSA public/private key pair and export to PEM files.

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Dim rsa As New Chilkat.Rsa()

Dim success As Boolean
success = rsa.UnlockComponent("Anything for 30-day trial")
If (success <> true) Then
    MsgBox("RSA component unlock failed")
    Exit Sub
End If


'  Generate a 1024-bit key.  Chilkat RSA supports
'  key sizes ranging from 512 bits to 4096 bits.
success = rsa.GenerateKey(1024)
If (success <> true) Then
    MsgBox(rsa.LastErrorText)
    Exit Sub
End If


'  Keys are exported in XML format:
Dim publicKeyXml As String
publicKeyXml = rsa.ExportPublicKey()
TextBox1.Text = TextBox1.Text & publicKeyXml & vbCrLf

Dim privateKeyXml As String
privateKeyXml = rsa.ExportPrivateKey()
TextBox1.Text = TextBox1.Text & privateKeyXml & vbCrLf

'  Save the private key in PEM format:
Dim privKey As New Chilkat.PrivateKey()
privKey.LoadXml(privateKeyXml)
privKey.SaveRsaPemFile("privateKey.pem")

'  Save the public key in PEM format:
Dim pubKey As New Chilkat.PublicKey()
pubKey.LoadXml(publicKeyXml)
pubKey.SaveOpenSslPemFile("publicKey.pem")