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(Excel) SSH Keyboard Authentication

Demonstrates how to implement keyboard authentication with an SSH server.

Download Excel Class Modules

Chilkat Excel Class Modules

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

Dim ssh As Chilkat.Ssh
Set ssh = Chilkat.NewSsh

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

'  Begin keyboard authentication..
Dim xmlResponse As String
xmlResponse = ssh.StartKeyboardAuth("myLogin")
If (ssh.LastMethodSuccess <> True) Then
    Debug.Print 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.Print "UserAuthBanner: "; ssh.UserAuthBanner

Dim xml As Chilkat.Xml
Set xml = Chilkat.NewXml

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

If (xml.HasChildWithTag("error") = True) Then
    Debug.Print "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 = ssh.ContinueKeyboardAuth("myPassword")
If (ssh.LastMethodSuccess <> True) Then
    Debug.Print ssh.LastErrorText
    Exit Sub
End If

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

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


 

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