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(PowerBuilder) SMTP over Multiple Hop SSH

Demonstrates how to send email (using TCP or TLS) tunneled through mulitple-hop SSH. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2 => SmtpServer

The ConnectThroughSsh and UseSsh methods are added in Chilkat version 9.5.0.55 to accomplish this task.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Ssh1
integer li_Success
oleobject loo_Ssh2
oleobject loo_Mailman
oleobject loo_Email

//  Important: It is helpful to send the contents of the
//  ssh.LastErrorText property when requesting support.

loo_Ssh1 = create oleobject
li_rc = loo_Ssh1.ConnectToNewObject("Chilkat_9_5_0.Ssh")
if li_rc < 0 then
    destroy loo_Ssh1
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  Any string automatically begins a fully-functional 30-day trial.
li_Success = loo_Ssh1.UnlockComponent("Anything for 30-day trial")
if li_Success <> 1 then
    Write-Debug loo_Ssh1.LastErrorText
    destroy loo_Ssh1
    return
end if

//  Connect directly to the 1st SSH server.
li_Success = loo_Ssh1.Connect("serverssh1.com",22)
if li_Success <> 1 then
    Write-Debug loo_Ssh1.LastErrorText
    destroy loo_Ssh1
    return
end if

//  Authenticate using login/password:
li_Success = loo_Ssh1.AuthenticatePw("ssh1Login","ssh1Password")
if li_Success <> 1 then
    Write-Debug loo_Ssh1.LastErrorText
    destroy loo_Ssh1
    return
end if

//  Connect through the 1st SSH connection to reach a 2nd SSH server.
//  Note: Any number of SSH connections may be simultaneously tunneled through a single
//  existing SSH connection.
loo_Ssh2 = create oleobject
li_rc = loo_Ssh2.ConnectToNewObject("Chilkat_9_5_0.Ssh")

li_Success = loo_Ssh2.ConnectThroughSsh(loo_Ssh1,"serverssh2.com",22)
if li_Success <> 1 then
    Write-Debug loo_Ssh2.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    return
end if

//  Authenticate with ssh2...
li_Success = loo_Ssh2.AuthenticatePw("ssh2Login","ssh2Password")
if li_Success <> 1 then
    Write-Debug loo_Ssh2.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    return
end if

loo_Mailman = create oleobject
li_rc = loo_Mailman.ConnectToNewObject("Chilkat_9_5_0.MailMan")

//  Any string argument automatically begins the 30-day trial.
li_Success = loo_Mailman.UnlockComponent("30-day trial")
if li_Success <> 1 then
    Write-Debug loo_Mailman.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    destroy loo_Mailman
    return
end if

//  Tell the mailman object to connect to the SMTP server though the ssh2 tunnel (which itself is routed through ssh1).
//  The connection looks like this:  Application => ServerSSH1 => ServerSSH2 => SMTPServer
li_Success = loo_Mailman.UseSsh(loo_Ssh2)
if li_Success <> 1 then
    Write-Debug loo_Mailman.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    destroy loo_Mailman
    return
end if

//  Set the SMTP server.
loo_Mailman.SmtpHost = "smtp.someserver.com"

//  Set the SMTP login/password (if required)
loo_Mailman.SmtpUsername = "myUsername"
loo_Mailman.SmtpPassword = "myPassword"

//  Create a new email object
loo_Email = create oleobject
li_rc = loo_Email.ConnectToNewObject("Chilkat_9_5_0.Email")

loo_Email.Subject = "This is a test"
loo_Email.Body = "This is a test"
loo_Email.From = "Chilkat Support <support@chilkatsoft.com>"
li_Success = loo_Email.AddTo("Chilkat Admin","admin@chilkatsoft.com")

li_Success = loo_Mailman.SendEmail(loo_Email)
if li_Success <> 1 then
    Write-Debug loo_Mailman.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    destroy loo_Mailman
    destroy loo_Email
    return
end if

//  Close the connection with the server.  This closes the tunnel through ssh2.
li_Success = loo_Mailman.CloseSmtpConnection()
if li_Success <> 1 then
    Write-Debug "Connection to SMTP server not closed cleanly."
end if

Write-Debug "Mail Sent!"

//  Close the connection with ssh2.  (This closes the the tunnel through ssh1.)
//  The connection with ssh1 is still alive, and may be used for more connections.
loo_Ssh2.Disconnect()

loo_Ssh1.Disconnect()


destroy loo_Ssh1
destroy loo_Ssh2
destroy loo_Mailman
destroy loo_Email

 

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