VB.NET
VB.NET
SSH Tunnel Authenticate with a Password
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Demonstrates the Chilkat SshTunnel.AuthenticatePw method, which authenticates the SSH connection with a login name and password. The first argument is the login and the second is the password. Connect first, and call BeginAccepting afterward.
Background: Password authentication is the simplest option, but the password is a secret and should never be a hard-coded literal — obtain it from an interactive prompt, an environment variable, or a secrets vault. Public-key authentication is generally preferred for the unattended, long-running services that tunnels often are.
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Dim success As Boolean = False
' Demonstrates the SshTunnel.AuthenticatePw method, which authenticates the SSH connection with
' a login name and password. The 1st argument is the login and the 2nd is the password.
Dim tunnel As New Chilkat.SshTunnel
' The tunnel forwards accepted local connections to this destination through the SSH server.
tunnel.DestHostname = "db.internal.example.com"
tunnel.DestPort = 5432
' Connect to the SSH server. This performs the TCP/proxy connection and SSH handshake, but
' does not authenticate yet.
Dim sshPort As Integer = 22
success = tunnel.Connect("ssh.example.com",sshPort)
If (success = False) Then
Debug.WriteLine(tunnel.LastErrorText)
Exit Sub
End If
' Normally you would not hard-code the password in source. You should instead obtain it
' from an interactive prompt, environment variable, or a secrets vault.
Dim password As String = "mySshPassword"
success = tunnel.AuthenticatePw("mySshLogin",password)
If (success = False) Then
Debug.WriteLine(tunnel.LastErrorText)
Exit Sub
End If
Debug.WriteLine("Authenticated.")
' After authenticating, call BeginAccepting to start listening for local connections to forward.
Dim waitForThreadExit As Boolean = True
success = tunnel.CloseTunnel(waitForThreadExit)
If (success = False) Then
Debug.WriteLine(tunnel.LastErrorText)
Exit Sub
End If