(VB.NET) SFTP use Cert's Private Key from PFX (.pfx/.p12)

Demonstrates how to use the private key associated with a certificate from a .pfx/.p12 file.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Dim cert As New Chilkat.Cert

Dim pfxFilepath As String = "qa_data/pfx/my.pfx"
Dim pfxPassword As String = "secret"

' A PFX typically contains certificates in the chain of authentication.
' The Chilkat cert object will choose the certificate w/
' private key farthest from the root authority cert.
' To access all the certificates in a PFX, use the 
' Chilkat certificate store object instead.
Dim success As Boolean = cert.LoadPfxFile(pfxFilepath,pfxPassword)
If (success <> True) 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...