366 lines
11 KiB
Ruby
366 lines
11 KiB
Ruby
# frozen_string_literal: true
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class DiscourseSingleSignOn < SingleSignOn
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class BlankExternalId < StandardError; end
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class BannedExternalId < StandardError; end
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def self.sso_url
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SiteSetting.discourse_connect_url
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end
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def self.sso_secret
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SiteSetting.discourse_connect_secret
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end
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def self.generate_sso(return_path = "/", secure_session:)
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sso = new(secure_session: secure_session)
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sso.nonce = SecureRandom.hex
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sso.register_nonce(return_path)
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sso.return_sso_url = Discourse.base_url + "/session/sso_login"
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sso
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end
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def self.generate_url(return_path = "/", secure_session:)
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generate_sso(return_path, secure_session: secure_session).to_url
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end
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def initialize(secure_session:)
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@secure_session = secure_session
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end
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def register_nonce(return_path)
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if nonce
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if SiteSetting.discourse_connect_csrf_protection
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@secure_session.set(nonce_key, return_path, expires: SingleSignOn.nonce_expiry_time)
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else
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Discourse.cache.write(nonce_key, return_path, expires_in: SingleSignOn.nonce_expiry_time)
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end
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end
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end
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def nonce_valid?
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if SiteSetting.discourse_connect_csrf_protection
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nonce && @secure_session[nonce_key].present?
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else
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nonce && Discourse.cache.read(nonce_key).present?
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end
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end
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def return_path
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if SiteSetting.discourse_connect_csrf_protection
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@secure_session[nonce_key] || "/"
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else
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Discourse.cache.read(nonce_key) || "/"
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end
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end
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def expire_nonce!
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if nonce
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if SiteSetting.discourse_connect_csrf_protection
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@secure_session[nonce_key] = nil
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else
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Discourse.cache.delete nonce_key
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end
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end
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end
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def nonce_key
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"SSO_NONCE_#{nonce}"
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end
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BANNED_EXTERNAL_IDS = %w{none nil blank null}
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def lookup_or_create_user(ip_address = nil)
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# we don't want to ban 0 from being an external id
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external_id = self.external_id.to_s
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if external_id.blank?
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raise BlankExternalId
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end
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if BANNED_EXTERNAL_IDS.include?(external_id.downcase)
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raise BannedExternalId, external_id
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end
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# we protect here to ensure there is no situation where the same external id
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# concurrently attempts to create or update sso records
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#
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# we can get duplicate HTTP requests quite easily (client rapid refresh) and this path does stuff such
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# as updating groups for a users and so on that can happen even after the sso record and user is there
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DistributedMutex.synchronize("sso_lookup_or_create_user_#{external_id}") do
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lookup_or_create_user_unsafe(ip_address)
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end
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end
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private
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def lookup_or_create_user_unsafe(ip_address)
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sso_record = SingleSignOnRecord.find_by(external_id: external_id)
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if sso_record && (user = sso_record.user)
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sso_record.last_payload = unsigned_payload
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else
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user = match_email_or_create_user(ip_address)
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sso_record = user.single_sign_on_record
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end
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# ensure it's not staged anymore
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user.unstage!
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change_external_attributes_and_override(sso_record, user)
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if sso_record && (user = sso_record.user) && !user.active && !require_activation
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user.active = true
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user.save!
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user.enqueue_welcome_message('welcome_user') unless suppress_welcome_message
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user.set_automatic_groups
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end
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custom_fields.each do |k, v|
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user.custom_fields[k] = v
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end
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user.ip_address = ip_address
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user.admin = admin unless admin.nil?
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user.moderator = moderator unless moderator.nil?
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user.title = title unless title.nil?
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# optionally save the user and sso_record if they have changed
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user.user_avatar.save! if user.user_avatar
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user.save!
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if @email_changed && user.active
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user.set_automatic_groups
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end
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# The user might require approval
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user.create_reviewable
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if bio && (user.user_profile.bio_raw.blank? || SiteSetting.discourse_connect_overrides_bio)
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user.user_profile.bio_raw = bio
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user.user_profile.save!
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end
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if website
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user.user_profile.website = website
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user.user_profile.save!
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end
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if location
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user.user_profile.location = location
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user.user_profile.save!
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end
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unless admin.nil? && moderator.nil?
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Group.refresh_automatic_groups!(:admins, :moderators, :staff)
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end
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sso_record.save!
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if sso_record.user
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apply_group_rules(sso_record.user)
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end
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sso_record && sso_record.user
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end
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def synchronize_groups(user)
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names = (groups || "").split(",").map(&:downcase)
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ids = Group.where('LOWER(NAME) in (?) AND NOT automatic', names).pluck(:id)
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group_users = GroupUser
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.where('group_id IN (SELECT id FROM groups WHERE NOT automatic)')
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.where(user_id: user.id)
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delete_group_users = group_users
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if ids.length > 0
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delete_group_users = group_users.where('group_id NOT IN (?)', ids)
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end
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delete_group_users.destroy_all
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ids -= group_users.where('group_id IN (?)', ids).pluck(:group_id)
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ids.each do |group_id|
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GroupUser.create(group_id: group_id, user_id: user.id)
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end
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end
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def apply_group_rules(user)
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if SiteSetting.discourse_connect_overrides_groups
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synchronize_groups(user)
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return
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end
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if add_groups
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split = add_groups.split(",").map(&:downcase)
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if split.length > 0
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Group.where('LOWER(name) in (?) AND NOT automatic', split).pluck(:id).each do |id|
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unless GroupUser.where(group_id: id, user_id: user.id).exists?
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GroupUser.create(group_id: id, user_id: user.id)
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end
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end
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end
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end
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if remove_groups
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split = remove_groups.split(",").map(&:downcase)
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if split.length > 0
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GroupUser
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.where(user_id: user.id)
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.where('group_id IN (SELECT id FROM groups WHERE LOWER(name) in (?))', split)
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.destroy_all
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end
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end
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end
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def match_email_or_create_user(ip_address)
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# Use a mutex here to counter SSO requests that are sent at the same time with
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# the same email payload
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DistributedMutex.synchronize("discourse_single_sign_on_#{email}") do
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user = User.find_by_email(email) if !require_activation
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if !user
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try_name = name.presence
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try_username = username.presence
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user_params = {
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primary_email: UserEmail.new(email: email, primary: true),
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name: try_name || User.suggest_name(try_username || email),
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username: UserNameSuggester.suggest(try_username || try_name || email),
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ip_address: ip_address
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}
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if SiteSetting.allow_user_locale && locale && LocaleSiteSetting.valid_value?(locale)
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user_params[:locale] = locale
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end
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user = User.create!(user_params)
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if SiteSetting.verbose_discourse_connect_logging
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Rails.logger.warn("Verbose SSO log: New User (user_id: #{user.id}) Params: #{user_params} User Params: #{user.attributes} User Errors: #{user.errors.full_messages} Email: #{user.primary_email.attributes} Email Error: #{user.primary_email.errors.full_messages}")
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end
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end
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if user
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if sso_record = user.single_sign_on_record
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sso_record.last_payload = unsigned_payload
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sso_record.external_id = external_id
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else
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if avatar_url.present?
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Jobs.enqueue(:download_avatar_from_url,
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url: avatar_url,
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user_id: user.id,
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override_gravatar: SiteSetting.discourse_connect_overrides_avatar
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)
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end
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if profile_background_url.present?
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Jobs.enqueue(:download_profile_background_from_url,
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url: profile_background_url,
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user_id: user.id,
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is_card_background: false
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)
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end
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if card_background_url.present?
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Jobs.enqueue(:download_profile_background_from_url,
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url: card_background_url,
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user_id: user.id,
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is_card_background: true
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)
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end
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user.create_single_sign_on_record!(
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last_payload: unsigned_payload,
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external_id: external_id,
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external_username: username,
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external_email: email,
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external_name: name,
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external_avatar_url: avatar_url,
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external_profile_background_url: profile_background_url,
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external_card_background_url: card_background_url
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)
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end
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end
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user
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end
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end
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def change_external_attributes_and_override(sso_record, user)
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@email_changed = false
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if SiteSetting.auth_overrides_email && user.email != Email.downcase(email)
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user.email = email
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user.active = false if require_activation
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@email_changed = true
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end
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if SiteSetting.auth_overrides_username? && username.present?
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if user.username.downcase == username.downcase
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user.username = username # there may be a change of case
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elsif user.username != username
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user.username = UserNameSuggester.suggest(username || name || email, user.username)
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end
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end
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if SiteSetting.auth_overrides_name && user.name != name && name.present?
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user.name = name || User.suggest_name(username.blank? ? email : username)
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end
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if locale_force_update && SiteSetting.allow_user_locale && locale && LocaleSiteSetting.valid_value?(locale)
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user.locale = locale
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end
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avatar_missing = user.uploaded_avatar_id.nil? || !Upload.exists?(user.uploaded_avatar_id)
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if (avatar_missing || avatar_force_update || SiteSetting.discourse_connect_overrides_avatar) && avatar_url.present?
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avatar_changed = sso_record.external_avatar_url != avatar_url
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if avatar_force_update || avatar_changed || avatar_missing
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Jobs.enqueue(:download_avatar_from_url, url: avatar_url, user_id: user.id, override_gravatar: SiteSetting.discourse_connect_overrides_avatar)
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end
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end
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if profile_background_url.present?
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profile_background_missing = user.user_profile.profile_background_upload.blank? || Upload.get_from_url(user.user_profile.profile_background_upload.url).blank?
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if profile_background_missing || SiteSetting.discourse_connect_overrides_profile_background
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profile_background_changed = sso_record.external_profile_background_url != profile_background_url
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if profile_background_changed || profile_background_missing
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Jobs.enqueue(:download_profile_background_from_url,
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url: profile_background_url,
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user_id: user.id,
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is_card_background: false
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)
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end
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end
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end
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if card_background_url.present?
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card_background_missing = user.user_profile.card_background_upload.blank? || Upload.get_from_url(user.user_profile.card_background_upload.url).blank?
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if card_background_missing || SiteSetting.discourse_connect_overrides_profile_background
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card_background_changed = sso_record.external_card_background_url != card_background_url
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if card_background_changed || card_background_missing
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Jobs.enqueue(:download_profile_background_from_url,
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url: card_background_url,
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user_id: user.id,
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is_card_background: true
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)
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end
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end
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end
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# change external attributes for sso record
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sso_record.external_username = username
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sso_record.external_email = email
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sso_record.external_name = name
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sso_record.external_avatar_url = avatar_url
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sso_record.external_profile_background_url = profile_background_url
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sso_record.external_card_background_url = card_background_url
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end
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end
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