VB.NET

SFTP Public-Key Authentication

See more SFTP Examples

Demonstrates how to authenticate with an SSH/SFTP server using publickey authentication. VB.NET

Dim success As Boolean = False

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

Dim sftp As New Chilkat.SFtp

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

' Connect to the SSH server.  
' The standard SSH port = 22
' The hostname may be a hostname or IP address.
Dim hostname As String = "sftp.example.com"
Dim port As Integer = 22
success = sftp.Connect(hostname,port)
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


Dim key As New Chilkat.SshKey

' Load a 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 = key.LoadText("myPrivateKey.pem")
If (key.LastMethodSuccess <> True) Then
    Debug.WriteLine(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.
success = key.FromOpenSshPrivateKey(privKey)
If (success <> True) Then
    Debug.WriteLine(key.LastErrorText)
    Exit Sub
End If


' Authenticate with the SSH server.  Chilkat SFTP supports
' both password-based authenication as well as public-key
' authentication.  
success = sftp.AuthenticatePk("myLogin",key)
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If

Debug.WriteLine(sftp.LastErrorText)
Debug.WriteLine("Public-Key Authentication Successful!")