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VB.NET UWP/WinRT Examples

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(VB.NET UWP/WinRT) SSH Keyboard Authentication

Demonstrates how to implement keyboard authentication with an SSH server.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

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

Dim ssh As New Chilkat.Ssh

'  Any string automatically begins a fully-functional 30-day trial.
Dim success As Boolean = ssh.UnlockComponent("Anything for 30-day trial")
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    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 Integer
Dim hostname As String
hostname = "www.my-ssh-server.com"
port = 22
success = Await ssh.ConnectAsync(hostname,port)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If



'  Begin keyboard authentication..
Dim xmlResponse As String = Await ssh.StartKeyboardAuthAsync("myLogin")
If (ssh.LastMethodSuccess <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


'  If a user authentication banner was received, then your app
'  may display it prior to prompting for the password.
Debug.WriteLine("UserAuthBanner: " & ssh.UserAuthBanner)

Dim xml As New Chilkat.Xml

success = xml.LoadXml(xmlResponse)
'  Assume LoadXml succeeds for the example..
If (xml.HasChildWithTag("success") = True) Then
    Debug.WriteLine("No password required, already authenticated.")
    Exit Sub
End If

If (xml.HasChildWithTag("error") = True) Then
    Debug.WriteLine("Authentication already failed.")
    Exit Sub
End If


'  See the online reference documentation for Chilkat SSH.
'  The XML returned by StartKeyboardAuth will contain an infoRequest
'  with one or more prompts that your application may choose to display.

'  Call ContinueKeyboardAuth, passing in the whatever information is requires (such as the password).
'  Typically, keyboard authentication requires one call to ContinueKeyboardAuth
'  using the password.  Theoretically, the SSH server could prompt for additional pieces
'  of information.  The authentication is completed when the XML returned contains
'  either a "success" or "error" child node.

'  This example asumes only one call to ContinueKeyboardAuth is required.
xmlResponse = Await ssh.ContinueKeyboardAuthAsync("myPassword")
If (ssh.LastMethodSuccess <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


success = xml.LoadXml(xmlResponse)
'  Assume LoadXml succeeds for the example..
If (xml.HasChildWithTag("success") = True) Then
    Debug.WriteLine("SSH Keyboard Authentication Successful!")
    Exit Sub
End If

If (xml.HasChildWithTag("error") = True) Then
    Debug.WriteLine("Authentication failed.")
    Exit Sub
End If


 

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