Ruby/NTLM – NTLM Authentication Library for Ruby

Ruby/NTLM provides message creator and parser for the NTLM authentication.

Some features:

  • Independent from non-standard Ruby libraries.

  • Supports NTLM and NTLMv2 reponses.

Simple Example

  • Creating NTLM Type 1 message

    t1 =
  • Parsing NTLM Type 2 message from server

    t2 = NTLM::Message.parse(message_from_server)
  • Creating NTLM Type 3 message

    t3 = t2.response({:user => 'user', :password => 'passwd'})


You can find Ruby/NTLM RubyForge page at