ruby-otp is a One Time Password library, compatible with OPIE and S/KEY, and RFC 1760 compliant.
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README.rdoc

ruby-otp

by Guillaume Pierronnet

DESCRIPTION:

ruby-otp is a One Time Password library, compatible with OPIE and S/KEY, and RFC 1760 compliant.

FEATURES/PROBLEMS:

  • pure ruby

  • RFC 1760 compliant

  • OPIE and S/KEY compatible

SYNOPSIS:

seq_num = 497
seed = "aa3423"
otp = OTP.new(seq_num, seed, "my really private password", "md5")
expected_sentence = otp.to_s.downcase

puts "please enter the sentence from your OTP calculator seq_num: #{seq_num}, seed: #{seed}"
sentence = gets.chop

if expected_sentence == sentence.downcase
  puts "access granted"
else
  puts "you're not authorized"
end

TODO

  • RFC 2289 support

REQUIREMENTS:

  • openssl for OpenSSL::Digest::MD4

INSTALL:

  • sudo gem install ruby-otp

LICENSE:

GPL