require_dependency 'rate_limiter' require_dependency 'single_sign_on' class SessionController < ApplicationController class LocalLoginNotAllowed < StandardError; end rescue_from LocalLoginNotAllowed do render nothing: true, status: 500 end before_filter :check_local_login_allowed, only: %i(create forgot_password) skip_before_filter :redirect_to_login_if_required skip_before_filter :preload_json, :check_xhr, only: ['sso', 'sso_login', 'become', 'sso_provider', 'destroy'] ACTIVATE_USER_KEY = "activate_user" def csrf render json: { csrf: form_authenticity_token } end def sso destination_url = cookies[:destination_url] || session[:destination_url] return_path = params[:return_path] || path('/') if destination_url && return_path == path('/') uri = URI::parse(destination_url) return_path = "#{uri.path}#{uri.query ? "?" << uri.query : ""}" end session.delete(:destination_url) cookies.delete(:destination_url) if SiteSetting.enable_sso? sso = DiscourseSingleSignOn.generate_sso(return_path) if SiteSetting.verbose_sso_logging Rails.logger.warn("Verbose SSO log: Started SSO process\n\n#{sso.diagnostics}") end redirect_to sso.to_url else render nothing: true, status: 404 end end def sso_provider(payload = nil) payload ||= request.query_string if SiteSetting.enable_sso_provider sso = SingleSignOn.parse(payload, SiteSetting.sso_secret) if current_user sso.name = current_user.name sso.username = current_user.username sso.email = current_user.email sso.external_id = current_user.id.to_s sso.admin = current_user.admin? sso.moderator = current_user.moderator? if sso.return_sso_url.blank? render plain: "return_sso_url is blank, it must be provided", status: 400 return end if request.xhr? cookies[:sso_destination_url] = sso.to_url(sso.return_sso_url) else redirect_to sso.to_url(sso.return_sso_url) end else session[:sso_payload] = request.query_string redirect_to path('/login') end else render nothing: true, status: 404 end end # For use in development mode only when login options could be limited or disabled. # NEVER allow this to work in production. def become raise Discourse::InvalidAccess.new unless Rails.env.development? user = User.find_by_username(params[:session_id]) raise "User #{params[:session_id]} not found" if user.blank? log_on_user(user) redirect_to path("/") end def sso_login raise Discourse::NotFound.new unless SiteSetting.enable_sso sso = DiscourseSingleSignOn.parse(request.query_string) if !sso.nonce_valid? if SiteSetting.verbose_sso_logging Rails.logger.warn("Verbose SSO log: Nonce has already expired\n\n#{sso.diagnostics}") end return render_sso_error(text: I18n.t("sso.timeout_expired"), status: 419) end if ScreenedIpAddress.should_block?(request.remote_ip) if SiteSetting.verbose_sso_logging Rails.logger.warn("Verbose SSO log: IP address is blocked #{request.remote_ip}\n\n#{sso.diagnostics}") end return render_sso_error(text: I18n.t("sso.unknown_error"), status: 500) end return_path = sso.return_path sso.expire_nonce! begin if user = sso.lookup_or_create_user(request.remote_ip) if SiteSetting.must_approve_users? && !user.approved? if SiteSetting.sso_not_approved_url.present? redirect_to SiteSetting.sso_not_approved_url else render_sso_error(text: I18n.t("sso.account_not_approved"), status: 403) end return elsif !user.active? activation = UserActivator.new(user, request, session, cookies) activation.finish session["user_created_message"] = activation.message redirect_to(users_account_created_path) && (return) else if SiteSetting.verbose_sso_logging Rails.logger.warn("Verbose SSO log: User was logged on #{user.username}\n\n#{sso.diagnostics}") end log_on_user user end # If it's not a relative URL check the host if return_path !~ /^\/[^\/]/ begin uri = URI(return_path) return_path = path("/") unless SiteSetting.sso_allows_all_return_paths || uri.host == Discourse.current_hostname rescue return_path = path("/") end end redirect_to return_path else render_sso_error(text: I18n.t("sso.not_found"), status: 500) end rescue ActiveRecord::RecordInvalid => e if SiteSetting.verbose_sso_logging Rails.logger.warn(<<~EOF) Verbose SSO log: Record was invalid: #{e.record.class.name} #{e.record.id} #{e.record.errors.to_h} Attributes: #{e.record.attributes.slice(*SingleSignOn::ACCESSORS.map(&:to_s))} SSO Diagnostics: #{sso.diagnostics} EOF end text = nil # If there's a problem with the email we can explain that if (e.record.is_a?(User) && e.record.errors[:email].present?) if e.record.email.blank? text = I18n.t("sso.no_email") else text = I18n.t("sso.email_error", email: ERB::Util.html_escape(e.record.email)) end end render_sso_error(text: text || I18n.t("sso.unknown_error"), status: 500) rescue => e message = "Failed to create or lookup user: #{e}." message << "\n\n" << "-" * 100 << "\n\n" message << sso.diagnostics message << "\n\n" << "-" * 100 << "\n\n" message << e.backtrace.join("\n") Rails.logger.error(message) render_sso_error(text: I18n.t("sso.unknown_error"), status: 500) end end def create RateLimiter.new(nil, "login-hr-#{request.remote_ip}", SiteSetting.max_logins_per_ip_per_hour, 1.hour).performed! RateLimiter.new(nil, "login-min-#{request.remote_ip}", SiteSetting.max_logins_per_ip_per_minute, 1.minute).performed! params.require(:login) params.require(:password) return invalid_credentials if params[:password].length > User.max_password_length login = params[:login].strip login = login[1..-1] if login[0] == "@" if user = User.find_by_username_or_email(login) # If their password is correct unless user.confirm_password?(params[:password]) invalid_credentials return end # If the site requires user approval and the user is not approved yet if login_not_approved_for?(user) login_not_approved return end # User signed on with username and password, so let's prevent the invite link # from being used to log in (if one exists). Invite.invalidate_for_email(user.email) else invalid_credentials return end if user.suspended? failed_to_login(user) return end if ScreenedIpAddress.should_block?(request.remote_ip) return not_allowed_from_ip_address(user) end if ScreenedIpAddress.block_admin_login?(user, request.remote_ip) return admin_not_allowed_from_ip_address(user) end (user.active && user.email_confirmed?) ? login(user) : not_activated(user) end def forgot_password params.require(:login) RateLimiter.new(nil, "forgot-password-hr-#{request.remote_ip}", 6, 1.hour).performed! RateLimiter.new(nil, "forgot-password-min-#{request.remote_ip}", 3, 1.minute).performed! RateLimiter.new(nil, "forgot-password-login-hour-#{params[:login].to_s[0..100]}", 12, 1.hour).performed! RateLimiter.new(nil, "forgot-password-login-min-#{params[:login].to_s[0..100]}", 3, 1.minute).performed! user = User.find_by_username_or_email(params[:login]) user_presence = user.present? && user.id > 0 && !user.staged if user_presence email_token = user.email_tokens.create(email: user.email) Jobs.enqueue(:critical_user_email, type: :forgot_password, user_id: user.id, email_token: email_token.token) end json = { result: "ok" } unless SiteSetting.forgot_password_strict json[:user_found] = user_presence end render json: json rescue RateLimiter::LimitExceeded render_json_error(I18n.t("rate_limiter.slow_down")) end def current if current_user.present? render_serialized(current_user, CurrentUserSerializer) else render nothing: true, status: 404 end end def destroy reset_session log_off_user if request.xhr? render nothing: true else redirect_to (params[:return_url] || path("/")) end end protected def check_local_login_allowed if SiteSetting.enable_sso || !SiteSetting.enable_local_logins raise LocalLoginNotAllowed, "SSO takes over local login or the local login is disallowed." end end private def login_not_approved_for?(user) SiteSetting.must_approve_users? && !user.approved? && !user.admin? end def invalid_credentials render json: { error: I18n.t("login.incorrect_username_email_or_password") } end def login_not_approved render json: { error: I18n.t("login.not_approved") } end def not_activated(user) session[ACTIVATE_USER_KEY] = user.id render json: { error: I18n.t("login.not_activated"), reason: 'not_activated', sent_to_email: user.find_email || user.email, current_email: user.email } end def not_allowed_from_ip_address(user) render json: { error: I18n.t("login.not_allowed_from_ip_address", username: user.username) } end def admin_not_allowed_from_ip_address(user) render json: { error: I18n.t("login.admin_not_allowed_from_ip_address", username: user.username) } end def failed_to_login(user) message = user.suspend_reason ? "login.suspended_with_reason" : "login.suspended" render json: { error: I18n.t(message, date: I18n.l(user.suspended_till, format: :date_only), reason: Rack::Utils.escape_html(user.suspend_reason)), reason: 'suspended' } end def login(user) session.delete(ACTIVATE_USER_KEY) log_on_user(user) if payload = session.delete(:sso_payload) sso_provider(payload) end render_serialized(user, UserSerializer) end def render_sso_error(status:, text:) @sso_error = text render status: status, layout: 'no_ember' end end