foodsoft/plugins/discourse/app/controllers/discourse_controller.rb

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2017-09-22 01:14:48 +02:00
class DiscourseController < ApplicationController
before_filter -> { require_plugin_enabled FoodsoftDiscourse }
skip_before_filter :authenticate
def initiate
discourse_url = FoodsoftConfig[:discourse_url]
nonce = SecureRandom.hex()
return_sso_url = url_for(action: :callback, only_path: false)
payload = "nonce=#{nonce}&return_sso_url=#{return_sso_url}"
base64_payload = Base64.encode64 payload
sso = URI.escape base64_payload
sig = get_hmac_hex_string base64_payload
session[:discourse_sso_nonce] = nonce
redirect_to "#{discourse_url}/session/sso_provider?sso=#{sso}&sig=#{sig}"
end
def callback
raise I18n.t('discourse.callback.invalid_signature') if get_hmac_hex_string(params[:sso]) != params[:sig]
info = Rack::Utils.parse_query(Base64.decode64(params[:sso]))
info.symbolize_keys!
raise I18n.t('discourse.callback.invalid_nonce') if info[:nonce] != session[:discourse_sso_nonce]
session[:discourse_sso_nonce] = nil
id = info[:external_id].to_i
user = User.find_or_initialize_by(id: id) do |user|
user.id = id
user.password = SecureRandom.random_bytes(25)
end
user.nick = info[:username]
user.email = info[:email]
user.first_name = info[:name]
user.last_name = ''
user.last_login = Time.now
user.save!
login_and_redirect_to_return_to user, :notice => I18n.t('discourse.callback.logged_in')
rescue => error
redirect_to login_url, :alert => error.to_s
end
private
def get_hmac_hex_string payload
discourse_sso_secret = FoodsoftConfig[:discourse_sso_secret]
OpenSSL::HMAC.hexdigest 'sha256', discourse_sso_secret, payload
end
end