B4X

Authenticate an SSH Tunnel with a Password

Demonstrates the Chilkat MailMan.SshAuthenticatePw method, which authenticates with the SSH server using an SSH username and password after an SSH tunnel has been opened. The first argument is the SSH account name and the second is the corresponding password. This example opens a tunnel, authenticates, and sends SMTP traffic through it.

Background: Opening an SSH tunnel and authenticating to the SSH server are two separate steps, and note the SSH credentials are distinct from the mail account credentials — the SSH login gets you through the tunnel, while SmtpUsername/SmtpPassword authenticate to the mail server at the far end. Password authentication is the simplest option; public-key authentication (SshAuthenticatePk) is generally preferred for automated systems.

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Dim success As Boolean = False

'  Demonstrates the MailMan.SshAuthenticatePw method, which authenticates with the SSH server
'  using an SSH username and password after an SSH tunnel has been opened.  The 1st argument
'  is the SSH account name and the 2nd is the corresponding password.

Dim mailman As ChilkatMailMan
mailman.Initialize("mailman")

'  Configure the SMTP server connection.  These connections will travel through the tunnel.
mailman.SmtpHost = "smtp.example.com"
mailman.SmtpPort = 465
mailman.SmtpSsl = True
mailman.SmtpUsername = "user@example.com"
mailman.SmtpPassword = "myPassword"

'  Open the SSH tunnel first.
success = mailman.SshOpenTunnel("ssh.example.com", 22)
If success = False Then
    Log(mailman.LastErrorText)
    Return
End If


'  Authenticate with the SSH server using a username and password.
success = mailman.SshAuthenticatePw("sshUser", "sshPassword")
If success = False Then
    Log(mailman.LastErrorText)
    Return
End If


Log("SSH tunnel authenticated.")

'  SMTP operations now travel through the SSH tunnel.
success = mailman.VerifySmtpLogin
If success = False Then
    Log(mailman.LastErrorText)
    Return
End If


success = mailman.SshCloseTunnel
If success = False Then
    Log(mailman.LastErrorText)
    Return
End If