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