CkPython

Share an Existing SSH Tunnel (Socket) with IMAP

Demonstrates the Chilkat Imap.UseSshTunnel method, which uses an existing SSH tunnel, represented by a Socket object, for IMAP connections. The only argument is the Socket. Call it before Connect. This example opens and authenticates the tunnel on a Socket, then routes IMAP through it.

Background: A Socket object can open and hold an SSH tunnel that several Chilkat objects share. This is the approach when the tunnel is managed independently of any one protocol object — for example a long-lived tunnel reused across IMAP, POP3, and SMTP sessions — whereas SshOpenTunnel ties the tunnel's lifetime to the Imap object.

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import sys
import chilkat

success = False

#  Demonstrates the Imap.UseSshTunnel method, which uses an existing SSH tunnel (represented by
#  a Socket) for IMAP connections.  The only argument is the Socket.  Call it before Connect.

imap = chilkat.CkImap()

#  Open and authenticate an SSH tunnel on a Socket object.  This tunnel can be shared with
#  other Chilkat objects.
sshTunnel = chilkat.CkSocket()
sshPort = 22
success = sshTunnel.SshOpenTunnel("ssh.example.com",sshPort)
if (success == False):
    print(sshTunnel.lastErrorText())
    sys.exit()

#  The SSH password is not hard-coded in source.  Insert code here to obtain it from an
#  interactive prompt, environment variable, or a secrets vault.

success = sshTunnel.SshAuthenticatePw("sshUser",sshPassword)
if (success == False):
    print(sshTunnel.lastErrorText())
    sys.exit()

#  Tell the Imap object to use the existing tunnel.
success = imap.UseSshTunnel(sshTunnel)
if (success == False):
    print(imap.lastErrorText())
    sys.exit()

#  Now connect and log in to the IMAP server through the tunnel.
imap.put_Ssl(True)
imap.put_Port(993)
success = imap.Connect("imap.example.com")
if (success == False):
    print(imap.lastErrorText())
    sys.exit()

success = imap.Login("user@example.com","myPassword")
if (success == False):
    print(imap.lastErrorText())
    sys.exit()

success = imap.Disconnect()
if (success == False):
    print(imap.lastErrorText())
    sys.exit()