Node.js ('child_process').spawn bug with SSH

readme.md

This node app attempts to run ssh via require('child_process').spawn with the following arguments:

$ ssh -tt -l ubuntu -N -i ~/.ssh/scrapers.pem -D 9050 0.0.0.0 -o StrictHostKeyChecking=no

... where 'ubuntu' is the username for the AWS EC2 AMI you are SSHing to and '0.0.0.0' is the IP address for the instance.

To replicate this issue, edit app.js to include the path to your *.pem file to login to the instance you want to ssh and the IP address of that machine, then run it with:

$ node app.js 

To confirm an SSH dynamic tunnel has been created and is working, run this line:

$ casperjs casperproxytest.js --proxy=127.0.0.1:9050 --proxy-type=socks5

If you don't have phantomjs and casperjs installed, you can install them both with brew:

$ brew install phantomjs

$ brew install casperjs

app.js

var spawn = require('child_process').spawn

var instance = {
  ipAddress: "0.0.0.0"
};

var awsPreSharedKeyPath = '~/.ssh/aws-preshared-key.pem'; // make sure key has permissions 600 with chmod


var spawnArgs = [ '-tt',                            // force teletype since ssh uses a psuedo-terminal
                  '-l ubuntu',                      // login name for the AMI being used
                  '-N',                             // don't execute remote commands since we are using instance for dynamic tunneling
                  //'-v',                           // verbose mode
                  '-i ' + awsPreSharedKeyPath,      // identity file
                  '-D 9050',                        // dynamic port on localhost
                  instance.ipAddress,               // ip address of machine you are SSHing into
                  '-o StrictHostKeyChecking=no' ];  // don't require you to type 'yes' if IP not yet on the list of known hosts
                  
var ssh = spawn('ssh', spawnArgs, {
  env: process.env
});

ssh.stdout.on('data', function (data) {
  console.log('stdout: ' + data);
});

ssh.stderr.on('data', function (data) {
  console.log('stderr: ' + data);
});

ssh.on('exit', function (code) {
  console.log('child process exited with code ' + code);
});

casperproxytest

var casper = require('casper').create();

casper.start('http://whatismyipaddress.com/', function() {
    this.debugPage();
});

casper.run();