update-onamae-ddns.rb: お名前.comのダイナミックDNSの登録を更新

update-onamae-ddns.rb

require 'socket'
require 'openssl'
 
abort "usage: #$0 userid password {'*'|''|subdomain} example.com" if ARGV.size != 4
 
UserID, Password, Subdomain, Domain = ARGV

OnamaePubkey = '224ad8a1d3af62ad5638091d485d7d9bf400e5d106ed0d5bdb1d96bb0ee6d2a5'
DDNSServer = 'ddnsclient.onamae.com'

IP = TCPSocket.open(DDNSServer, 65000) {|socket| socket.gets }[6..-2]

TCPSocket.open(DDNSServer, 65010) do |socket|
  context = OpenSSL::SSL::SSLContext.new
  context.set_params
  context.verify_mode = OpenSSL::SSL::VERIFY_NONE
  ssl = OpenSSL::SSL::SSLSocket.new(socket, context)
  ssl.connect
  raise "#{ssl.verify_result}" if ssl.verify_result != OpenSSL::X509::V_OK
  ssl.post_connection_check(DDNSServer)
  raise "public key is not right" if OpenSSL::Digest::SHA256.hexdigest(ssl.peer_cert.public_key.to_der) != OnamaePubkey
  
  begin
    ssl.puts *%W[LOGIN USERID:#{UserID} PASSWORD:#{Password} .]
    response = ssl.gets("\n.\n")
    raise response if response.to_i != 0
    
    ssl.puts *%W[MODIP HOSTNAME:#{Subdomain} DOMNAME:#{Domain} IPV4:#{IP} .]
    response = ssl.gets("\n.\n")
    raise response if response.to_i != 0
  ensure
    ssl.puts *%W[LOGOUT .]
  end
end