cas authentication

cas-authentication.rb

require 'rubygems'
require 'faraday'
require 'faraday_middleware'

cas = Faraday.new(:url => 'http://cas.dev') do |faraday|
  faraday.request :url_encoded
  faraday.response :logger
  faraday.response :xml, :content_type => /\bxml$/

  faraday.adapter Faraday.default_adapter
end

response = cas.post '/loginTicket'
if !response.success?
  STDERR.puts "ERROR: unable to get login ticket (#{response.status})"
  exit
end

lt = response.body

response = cas.post '/login', :username => ARGV[0], :password => ARGV[1], :lt => lt, :service => 'foo'
if response.status != 303
  STDERR.puts "ERROR: login failed (#{response.status})"
  exit
end

location = response.headers['location']
query = URI.parse(location).query
params = CGI.parse(query)
ticket = params['ticket'].first

response = cas.get '/serviceValidate', :service => 'foo', :ticket => ticket

if !response.success?
  STDERR.puts "ERROR: login failed - unable to validate ticket (#{response.status})"
  exit
end

response = response.body['serviceResponse']

if response.include?('authenticationFailure')
  STDERR.puts "ERROR: authentication failed - #{response['authenticationFailure']}"
else
  response['authenticationSuccess'].each do |key,value|
    STDERR.puts "#{key}=#{YAML.load(value).inspect}"
  end
end