(VB.NET) SFTP use Cert's Private Key for Authentication (Windows)

Demonstrates how to use the private key of a pre-installed certificate (on Windows) for SFTP authentication. The certificate's private key must be marked as "exportable" when originally installed.

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


Dim cert As New Chilkat.Cert

' Load the certificate from the Windows certificate store
Dim success As Boolean = cert.LoadByCommonName("my_cert_common_name")
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' Get the private key.  
Dim privKey As Chilkat.PrivateKey = cert.ExportPrivateKey()
If (cert.LastMethodSuccess = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


Dim privKeyPem As String = privKey.GetPkcs8Pem()
If (privKey.LastMethodSuccess = False) Then
    Debug.WriteLine(privKey.LastErrorText)
    Exit Sub
End If


Dim sshKey As New Chilkat.SshKey
success = sshKey.FromOpenSshPrivateKey(privKeyPem)
If (success = False) Then
    Debug.WriteLine(sshKey.LastErrorText)
    Exit Sub
End If



' Connect to an SSH/SFTP server
Dim sftp As New Chilkat.SFtp
success = sftp.Connect("sftp.example.com",22)
If (success = False) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Authenticate with the SSH server using a username + private key.
' (The private key serves as the password.  The username identifies
' the SSH user account on the server.)
success = sftp.AuthenticatePk("mySshLogin",sshKey)
If (success = False) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("OK, the connection and authentication with the SSH server is completed.")

' This example is only to show the connection + authentication using a private key associated with a certificate in the Windows certificate store...