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(Excel) SSH Public Key Authentication

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

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

Dim key As Chilkat.SshKey
Set key = Chilkat.NewSshKey

'  Read the PEM file into a string variable:
'  (This does not load the PEM file into the key.  The LoadText
'  method is a convenience method for loading the full contents of ANY text
'  file into a string variable.)
Dim privKey As String
privKey = key.LoadText("myPrivateKey.pem")
If (key.LastMethodSuccess <> True) Then
    Debug.Print key.LastErrorText
    Exit Sub
End If

'  Load a private key from a PEM string:
'  (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.
'  (For PuTTY keys, call FromPuttyPrivateKey instead.)
success = key.FromOpenSshPrivateKey(privKey)
If (success <> True) Then
    Debug.Print key.LastErrorText
    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 <> True) Then
    Debug.Print ssh.LastErrorText
    Exit Sub
End If

Debug.Print ssh.LastErrorText
Debug.Print "Public-Key Authentication Successful!"

 

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