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(Delphi DLL) IMAP over Multiple Hop SSH

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

Application => ServerSSH1 => ServerSSH2 => IMAPServer

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

Chilkat for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Imap, Ssh;

...

procedure TForm1.Button1Click(Sender: TObject);
var
ssh1: HCkSsh;
success: Boolean;
ssh2: HCkSsh;
imap: HCkImap;

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

ssh1 := CkSsh_Create();

//  Any string automatically begins a fully-functional 30-day trial.
success := CkSsh_UnlockComponent(ssh1,'Anything for 30-day trial');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh1));
    Exit;
  end;

//  Connect directly to the 1st SSH server.
success := CkSsh_Connect(ssh1,'serverssh1.com',22);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh1));
    Exit;
  end;

//  Authenticate using login/password:
success := CkSsh_AuthenticatePw(ssh1,'ssh1Login','ssh1Password');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh1));
    Exit;
  end;

//  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.
ssh2 := CkSsh_Create();
success := CkSsh_ConnectThroughSsh(ssh2,ssh1,'serverssh2.com',22);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh2));
    Exit;
  end;

//  Authenticate with ssh2...
success := CkSsh_AuthenticatePw(ssh2,'ssh2Login','ssh2Password');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh2));
    Exit;
  end;

imap := CkImap_Create();

//  Anything unlocks the component and begins a fully-functional 30-day trial.
success := CkImap_UnlockComponent(imap,'Anything for 30-day trial');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

//  Tell the IMAP object to connect to the IMAP server though the ssh2 tunnel (which itself is routed through ssh1).
//  The connection looks like this:  Application => ServerSSH1 => ServerSSH2 => IMAPServer
success := CkImap_UseSsh(imap,ssh2);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

CkImap_putSsl(imap,True);
CkImap_putPort(imap,993);

//  Connect to an IMAP server (through the multi-hop SSH tunnel)
success := CkImap_Connect(imap,'imap.someimapserver.com');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

//  Login
success := CkImap_Login(imap,'myLogin','myPassword');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

//  Do whatever needs to be done...  for example,

//  Create the new email folder (sub-mailbox) on the IMAP server.
//  If no folder path is provided, the new folder is a sub-mailbox of Inbox.
success := CkImap_CreateMailbox(imap,'newFolder');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

Memo1.Lines.Add('Success.');

//  Close the connection with the IMAP server.  (This closes the tunnel through ssh2)
//  The connection with ssh2 is still alive, and may be used for more connections.
success := CkImap_Disconnect(imap);

//  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.
CkSsh_Disconnect(ssh2);

CkSsh_Disconnect(ssh1);

CkSsh_Dispose(ssh1);
CkSsh_Dispose(ssh2);
CkImap_Dispose(imap);

end;

 

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