(PHP ActiveX) SSH Tunnel with Dynamic Port Forwarding

Demonstrates how to start a background thread that runs a portable SSH tunnel w/ dynamic port forwarding that the foreground thread can use for establishing connections through an SSH tunnel.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
// by calling UnlockBundle.  It requires a Bundle unlock code.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Global')
$chilkatGlob = new COM("Chilkat.Global");
$success = $chilkatGlob->UnlockBundle('Anything for 30-day trial.');
if ($success != 1) {
    print $chilkatGlob->LastErrorText . "\n";
    exit;
}

// This example requires Chilkat version 9.5.0.50 or greater.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.SshTunnel')
$tunnel = new COM("Chilkat.SshTunnel");

$sshHostname = 'sftp.example.com';
$sshPort = 22;

// Connect to an SSH server and establish the SSH tunnel:
$success = $tunnel->Connect($sshHostname,$sshPort);
if ($success != 1) {
    print $tunnel->LastErrorText . "\n";
    exit;
}

// Authenticate with the SSH server via a login/password
// or with a public key.  
// This example demonstrates SSH password authentication.
$success = $tunnel->AuthenticatePw('mySshLogin','mySshPassword');
if ($success != 1) {
    print $tunnel->LastErrorText . "\n";
    exit;
}

// Indicate that the background SSH tunnel thread will behave as a SOCKS proxy server
// with dynamic port forwarding:
$tunnel->DynamicPortForwarding = 1;

// We may optionally require that connecting clients authenticate with our SOCKS proxy server.
// To do this, set an inbound username/password.  Any connecting clients would be required to 
// use SOCKS5 with the correct username/password.
// If no inbound username/password is set, then our SOCKS proxy server will accept both
// SOCKS4 and SOCKS5 unauthenticated connections.

$tunnel->InboundSocksUsername = 'chilkat123';
$tunnel->InboundSocksPassword = 'password123';

// Start the listen/accept thread to begin accepting SOCKS proxy client connections.
// Listen on port 1080.
$success = $tunnel->BeginAccepting(1080);
if ($success != 1) {
    print $tunnel->LastErrorText . "\n";
    exit;
}

// Now that a background thread is running a SOCKS proxy server that forwards connections
// through an SSH tunnel, it is possible to use any Chilkat implemented protocol that is SOCKS capable,
// such as HTTP, POP3, SMTP, IMAP, FTP, etc.  The protocol may use SSL/TLS because the SSL/TLS
// will be passed through the SSH tunnel to the end-destination.  Also, any number of simultaneous
// connections may be routed through the SSH tunnel.

// For this example, let's do a simple HTTPS request:
$url = 'https://www.ethereum.org/';

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Http')
$http = new COM("Chilkat.Http");

// Indicate that the HTTP object is to use our portable SOCKS proxy/SSH tunnel running in our background thread.
$http->SocksHostname = 'localhost';
$http->SocksPort = 1080;
$http->SocksVersion = 5;
$http->SocksUsername = 'chilkat123';
$http->SocksPassword = 'password123';

$http->SendCookies = 1;
$http->SaveCookies = 1;
$http->CookieDir = 'memory';

// Do the HTTPS page fetch (through the SSH tunnel)
$html = $http->quickGetStr($url);
if ($http->LastMethodSuccess != 1) {
    print $http->LastErrorText . "\n";
    exit;
}

// Stop the background listen/accept thread:
$waitForThreadExit = 1;
$success = $tunnel->StopAccepting($waitForThreadExit);
if ($success != 1) {
    print $tunnel->LastErrorText . "\n";
    exit;
}

// Close the SSH tunnel (would also kick any remaining connected clients).
$success = $tunnel->CloseTunnel($waitForThreadExit);
if ($success != 1) {
    print $tunnel->LastErrorText . "\n";
    exit;
}


?>