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(C# UWP/WinRT) 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 Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// 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 = await ssh1.ConnectAsync("serverssh1.com",22);
if (success != true) {
    Debug.WriteLine(ssh1.LastErrorText);
    return;
}

// Authenticate using login/password:
success = await ssh1.AuthenticatePwAsync("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 = await ssh2.ConnectThroughSshAsync(ssh1,"serverssh2.com",22);
if (success != true) {
    Debug.WriteLine(ssh2.LastErrorText);
    return;
}

// Authenticate with ssh2...
success = await ssh2.AuthenticatePwAsync("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 = await imap.ConnectAsync("imap.someimapserver.com");
if (success != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Login
success = await imap.LoginAsync("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 = await imap.CreateMailboxAsync("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 = await imap.DisconnectAsync();

// 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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