SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

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'  Important: It is helpful to send the contents of the
'  sftp.LastErrorText property when sending email
'  to support@chilkatsoft.com

Dim ssh As New ChilkatSsh

'  Any string automatically begins a fully-functional 30-day trial.
Dim success As Long
success = ssh.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    Text1.Text = Text1.Text & ssh.LastErrorText & vbCrLf
    Exit Sub
End If

'  Set some timeouts, in milliseconds:
ssh.ConnectTimeoutMs = 5000
ssh.IdleTimeoutMs = 15000

'  Connect to the SSH server.
'  The standard SSH port = 22
'  The hostname may be a hostname or IP address.
Dim port As Long
Dim hostname As String
hostname = "www.my-ssh-server.com"
port = 22
success = ssh.Connect(hostname,port)
If (success <> 1) Then
    Text1.Text = Text1.Text & ssh.LastErrorText & vbCrLf
    Exit Sub
End If

Dim key As New ChilkatSshKey

'  Load a private key from a PEM file:
'  (Private keys may be loaded from OpenSSH and Putty formats.
'  Both encrypted and unencrypted private key file formats
'  are supported.  This example loads an unencrypted private
'  key in OpenSSH format.  PuTTY keys typically use the .ppk
'  file extension, while OpenSSH keys use the PEM format.
Dim privKey As String
privKey = key.LoadText("myPrivateKey.pem")
If (privKey = vbNullString ) Then
    Text1.Text = Text1.Text & key.LastErrorText & vbCrLf
    Exit Sub
End If

'  (For PuTTY keys, call FromPuttyPrivateKey instead.)
success = key.FromOpenSshPrivateKey(privKey)
If (success <> 1) Then
    Text1.Text = Text1.Text & key.LastErrorText & vbCrLf
    Exit Sub
End If

'  Authenticate with the SSH server using the login and
'  private key.  (The corresponding public key should've
'  been installed on the SSH server beforehand.)
success = ssh.AuthenticatePk("myLogin",key)
If (success <> 1) Then
    Text1.Text = Text1.Text & ssh.LastErrorText & vbCrLf
    Exit Sub
End If

MsgBox ssh.LastErrorText
MsgBox "Public-Key Authentication Successful!"