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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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class MetasploitModule < Msf::Auxiliary
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  include Msf::Exploit::Remote::HttpClient
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  include Msf::Auxiliary::Scanner
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  def initialize(info = {})
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    super(update_info(info,
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      'Name' => 'Chromecast Wifi Enumeration',
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      'Description' => %q{
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        This module enumerates wireless access points through Chromecast.
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      },
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      'Author' => ['wvu'],
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      'References' => [
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        ['URL', 'http://www.google.com/intl/en/chrome/devices/chromecast/index.html'] # vendor website
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      ],
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      'License' => MSF_LICENSE
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    ))
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    register_options([
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      Opt::RPORT(8008)
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    ])
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  end
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  def run_host(ip)
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    res = scan
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    return unless res && res.code == 200
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    waps_table = Rex::Text::Table.new(
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      'Header' => "Wireless Access Points from #{ip}",
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      'Columns' => [
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        'BSSID',
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        'PWR',
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        'ENC',
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        'CIPHER',
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        'AUTH',
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        'ESSID'
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      ],
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      'SortIndex' => -1
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    )
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    res.get_json_document.each do |wap|
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      waps_table << [
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        wap['bssid'],
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        wap['signal_level'],
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        enc(wap),
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        cipher(wap),
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        auth(wap),
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        wap['ssid'] + (wap['wpa_id'] ? ' (*)' : '')
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      ]
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    end
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    unless waps_table.rows.empty?
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      print_line(waps_table.to_s)
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      report_note(
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        :host => ip,
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        :port => rport,
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        :proto => 'tcp',
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        :type => 'chromecast.wifi',
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        :data => waps_table.to_csv
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      )
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    end
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  end
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  def scan
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    send_request_raw(
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      'method' => 'POST',
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      'uri' => '/setup/scan_wifi',
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      'agent' => Rex::Text.rand_text_english(rand(42) + 1)
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    )
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    send_request_raw(
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      'method' => 'GET',
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      'uri' => '/setup/scan_results',
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      'agent' => Rex::Text.rand_text_english(rand(42) + 1)
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    )
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  end
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  def enc(wap)
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    case wap['wpa_auth']
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    when 1
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      'OPN'
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    when 2
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      'WEP'
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    when 5
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      'WPA'
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    when 0, 7
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      'WPA2'
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    else
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      wap['wpa_auth']
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    end
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  end
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  def cipher(wap)
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    case wap['wpa_cipher']
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    when 1
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      ''
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    when 2
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      'WEP'
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    when 3
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      'TKIP'
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    when 4
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      'CCMP'
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    else
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      wap['wpa_cipher']
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    end
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  end
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  def auth(wap)
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    case wap['wpa_auth']
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    when 0
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      'MGT'
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    when 5, 7
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      'PSK'
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    else
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      ''
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    end
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  end
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end
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