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(C#) IMAP over Multiple Hop SSHDemonstrates 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.
// This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.Ssh ssh1 = new Chilkat.Ssh(); // Connect directly to the 1st SSH server. bool success = ssh1.Connect("serverssh1.com",22); if (success != true) { Debug.WriteLine(ssh1.LastErrorText); return; } // Authenticate using login/password: success = ssh1.AuthenticatePw("ssh1Login","ssh1Password"); if (success != true) { Debug.WriteLine(ssh1.LastErrorText); return; } // 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. Chilkat.Ssh ssh2 = new Chilkat.Ssh(); success = ssh2.ConnectThroughSsh(ssh1,"serverssh2.com",22); if (success != true) { Debug.WriteLine(ssh2.LastErrorText); return; } // Authenticate with ssh2... success = ssh2.AuthenticatePw("ssh2Login","ssh2Password"); if (success != true) { Debug.WriteLine(ssh2.LastErrorText); return; } Chilkat.Imap imap = new Chilkat.Imap(); // 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 = imap.UseSsh(ssh2); if (success != true) { Debug.WriteLine(imap.LastErrorText); return; } imap.Ssl = true; imap.Port = 993; // Connect to an IMAP server (through the multi-hop SSH tunnel) success = imap.Connect("imap.someimapserver.com"); if (success != true) { Debug.WriteLine(imap.LastErrorText); return; } // Login success = imap.Login("myLogin","myPassword"); if (success != true) { Debug.WriteLine(imap.LastErrorText); return; } // 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 = imap.CreateMailbox("newFolder"); if (success != true) { Debug.WriteLine(imap.LastErrorText); return; } Debug.WriteLine("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 = imap.Disconnect(); // 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. ssh2.Disconnect(); ssh1.Disconnect(); |
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