399 lines
11 KiB
Ruby
399 lines
11 KiB
Ruby
# frozen_string_literal: true
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class Auth::DefaultCurrentUserProvider
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CURRENT_USER_KEY ||= "_DISCOURSE_CURRENT_USER"
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API_KEY ||= "api_key"
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API_USERNAME ||= "api_username"
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HEADER_API_KEY ||= "HTTP_API_KEY"
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HEADER_API_USERNAME ||= "HTTP_API_USERNAME"
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HEADER_API_USER_EXTERNAL_ID ||= "HTTP_API_USER_EXTERNAL_ID"
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HEADER_API_USER_ID ||= "HTTP_API_USER_ID"
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PARAMETER_USER_API_KEY ||= "user_api_key"
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USER_API_KEY ||= "HTTP_USER_API_KEY"
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USER_API_CLIENT_ID ||= "HTTP_USER_API_CLIENT_ID"
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API_KEY_ENV ||= "_DISCOURSE_API"
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USER_API_KEY_ENV ||= "_DISCOURSE_USER_API"
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TOKEN_COOKIE ||= ENV['DISCOURSE_TOKEN_COOKIE'] || "_t"
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PATH_INFO ||= "PATH_INFO"
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COOKIE_ATTEMPTS_PER_MIN ||= 10
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BAD_TOKEN ||= "_DISCOURSE_BAD_TOKEN"
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PARAMETER_API_PATTERNS ||= [
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{
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method: :get,
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route: [
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"posts#latest",
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"posts#user_posts_feed",
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"groups#posts_feed",
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"groups#mentions_feed",
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"list#user_topics_feed",
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"list#category_feed",
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"topics#feed",
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"badges#show",
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"tags#tag_feed",
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"tags#show",
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*[:latest, :unread, :new, :read, :posted, :bookmarks].map { |f| "list##{f}_feed" },
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*[:all, :yearly, :quarterly, :monthly, :weekly, :daily].map { |p| "list#top_#{p}_feed" },
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*[:latest, :unread, :new, :read, :posted, :bookmarks].map { |f| "tags#show_#{f}" }
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],
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format: :rss
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},
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{
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method: :get,
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route: "users#bookmarks",
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format: :ics
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},
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{
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method: :post,
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route: "admin/email#handle_mail",
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format: "*"
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}
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]
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# do all current user initialization here
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def initialize(env)
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@env = env
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@request = Rack::Request.new(env)
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end
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# our current user, return nil if none is found
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def current_user
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return @env[CURRENT_USER_KEY] if @env.key?(CURRENT_USER_KEY)
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# bypass if we have the shared session header
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if shared_key = @env['HTTP_X_SHARED_SESSION_KEY']
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uid = Discourse.redis.get("shared_session_key_#{shared_key}")
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user = nil
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if uid
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user = User.find_by(id: uid.to_i)
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end
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@env[CURRENT_USER_KEY] = user
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return user
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end
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request = @request
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user_api_key = @env[USER_API_KEY]
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api_key = @env[HEADER_API_KEY]
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if !@env.blank? && request[PARAMETER_USER_API_KEY] && api_parameter_allowed?
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user_api_key ||= request[PARAMETER_USER_API_KEY]
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end
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if !@env.blank? && request[API_KEY] && api_parameter_allowed?
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api_key ||= request[API_KEY]
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end
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auth_token = request.cookies[TOKEN_COOKIE] unless user_api_key || api_key
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current_user = nil
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if auth_token && auth_token.length == 32
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limiter = RateLimiter.new(nil, "cookie_auth_#{request.ip}", COOKIE_ATTEMPTS_PER_MIN , 60)
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if limiter.can_perform?
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@user_token = begin
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UserAuthToken.lookup(
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auth_token,
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seen: true,
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user_agent: @env['HTTP_USER_AGENT'],
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path: @env['REQUEST_PATH'],
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client_ip: @request.ip
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)
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rescue ActiveRecord::ReadOnlyError
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nil
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end
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current_user = @user_token.try(:user)
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end
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if !current_user
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@env[BAD_TOKEN] = true
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begin
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limiter.performed!
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rescue RateLimiter::LimitExceeded
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raise Discourse::InvalidAccess.new(
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'Invalid Access',
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nil,
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delete_cookie: TOKEN_COOKIE
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)
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end
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end
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elsif @env['HTTP_DISCOURSE_LOGGED_IN']
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@env[BAD_TOKEN] = true
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end
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# possible we have an api call, impersonate
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if api_key
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current_user = lookup_api_user(api_key, request)
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raise Discourse::InvalidAccess.new(I18n.t('invalid_api_credentials'), nil, custom_message: "invalid_api_credentials") unless current_user
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raise Discourse::InvalidAccess if current_user.suspended? || !current_user.active
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@env[API_KEY_ENV] = true
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rate_limit_admin_api_requests(api_key)
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end
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# user api key handling
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if user_api_key
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limiter_min = RateLimiter.new(nil, "user_api_min_#{user_api_key}", GlobalSetting.max_user_api_reqs_per_minute, 60)
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limiter_day = RateLimiter.new(nil, "user_api_day_#{user_api_key}", GlobalSetting.max_user_api_reqs_per_day, 86400)
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unless limiter_day.can_perform?
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limiter_day.performed!
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end
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unless limiter_min.can_perform?
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limiter_min.performed!
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end
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current_user = lookup_user_api_user_and_update_key(user_api_key, @env[USER_API_CLIENT_ID])
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raise Discourse::InvalidAccess unless current_user
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raise Discourse::InvalidAccess if current_user.suspended? || !current_user.active
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limiter_min.performed!
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limiter_day.performed!
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@env[USER_API_KEY_ENV] = true
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end
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# keep this rule here as a safeguard
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# under no conditions to suspended or inactive accounts get current_user
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if current_user && (current_user.suspended? || !current_user.active)
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current_user = nil
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end
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if current_user && should_update_last_seen?
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u = current_user
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ip = request.ip
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Scheduler::Defer.later "Updating Last Seen" do
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u.update_last_seen!
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u.update_ip_address!(ip)
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end
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end
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@env[CURRENT_USER_KEY] = current_user
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end
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def refresh_session(user, session, cookies)
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# if user was not loaded, no point refreshing session
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# it could be an anonymous path, this would add cost
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return if is_api? || !@env.key?(CURRENT_USER_KEY)
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if !is_user_api? && @user_token && @user_token.user == user
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rotated_at = @user_token.rotated_at
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needs_rotation = @user_token.auth_token_seen ? rotated_at < UserAuthToken::ROTATE_TIME.ago : rotated_at < UserAuthToken::URGENT_ROTATE_TIME.ago
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if needs_rotation
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if @user_token.rotate!(user_agent: @env['HTTP_USER_AGENT'],
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client_ip: @request.ip,
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path: @env['REQUEST_PATH'])
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cookies[TOKEN_COOKIE] = cookie_hash(@user_token.unhashed_auth_token)
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DiscourseEvent.trigger(:user_session_refreshed, user)
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end
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end
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end
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if !user && cookies.key?(TOKEN_COOKIE)
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cookies.delete(TOKEN_COOKIE)
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end
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end
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def log_on_user(user, session, cookies, opts = {})
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@user_token = UserAuthToken.generate!(
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user_id: user.id,
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user_agent: @env['HTTP_USER_AGENT'],
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path: @env['REQUEST_PATH'],
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client_ip: @request.ip,
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staff: user.staff?,
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impersonate: opts[:impersonate])
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cookies[TOKEN_COOKIE] = cookie_hash(@user_token.unhashed_auth_token)
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user.unstage!
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make_developer_admin(user)
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enable_bootstrap_mode(user)
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UserAuthToken.enforce_session_count_limit!(user.id)
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@env[CURRENT_USER_KEY] = user
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end
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def cookie_hash(unhashed_auth_token)
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hash = {
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value: unhashed_auth_token,
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httponly: true,
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expires: SiteSetting.maximum_session_age.hours.from_now,
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secure: SiteSetting.force_https
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}
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if SiteSetting.same_site_cookies != "Disabled"
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hash[:same_site] = SiteSetting.same_site_cookies
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end
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hash
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end
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def make_developer_admin(user)
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if user.active? &&
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!user.admin &&
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Rails.configuration.respond_to?(:developer_emails) &&
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Rails.configuration.developer_emails.include?(user.email)
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user.admin = true
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user.save
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end
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end
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def enable_bootstrap_mode(user)
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return if SiteSetting.bootstrap_mode_enabled
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if user.admin && user.last_seen_at.nil? && user.is_singular_admin?
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Jobs.enqueue(:enable_bootstrap_mode, user_id: user.id)
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end
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end
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def log_off_user(session, cookies)
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user = current_user
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if SiteSetting.log_out_strict && user
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user.user_auth_tokens.destroy_all
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if user.admin && defined?(Rack::MiniProfiler)
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# clear the profiling cookie to keep stuff tidy
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cookies.delete("__profilin")
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end
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user.logged_out
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elsif user && @user_token
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@user_token.destroy
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end
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cookies.delete('authentication_data')
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cookies.delete(TOKEN_COOKIE)
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end
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# api has special rights return true if api was detected
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def is_api?
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current_user
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!!(@env[API_KEY_ENV])
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end
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def is_user_api?
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current_user
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!!(@env[USER_API_KEY_ENV])
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end
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def has_auth_cookie?
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cookie = @request.cookies[TOKEN_COOKIE]
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!cookie.nil? && cookie.length == 32
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end
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def should_update_last_seen?
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return false unless can_write?
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api = !!(@env[API_KEY_ENV]) || !!(@env[USER_API_KEY_ENV])
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if @request.xhr? || api
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@env["HTTP_DISCOURSE_PRESENT"] == "true"
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else
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true
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end
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end
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protected
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def lookup_user_api_user_and_update_key(user_api_key, client_id)
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if api_key = UserApiKey.active.with_key(user_api_key).includes(:user).first
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unless api_key.allow?(@env)
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raise Discourse::InvalidAccess
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end
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if can_write?
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api_key.update_columns(last_used_at: Time.zone.now)
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if client_id.present? && client_id != api_key.client_id
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# invalidate old dupe api key for client if needed
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UserApiKey
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.where(client_id: client_id, user_id: api_key.user_id)
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.where('id <> ?', api_key.id)
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.destroy_all
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api_key.update_columns(client_id: client_id)
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end
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end
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api_key.user
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end
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end
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def lookup_api_user(api_key_value, request)
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if api_key = ApiKey.active.with_key(api_key_value).includes(:user).first
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api_username = header_api_key? ? @env[HEADER_API_USERNAME] : request[API_USERNAME]
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params = @env['action_dispatch.request.parameters']
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unless api_key.request_allowed?(request, params)
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Rails.logger.warn("[Unauthorized API Access] username: #{api_username}, IP address: #{request.ip}")
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return nil
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end
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user =
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if api_key.user
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api_key.user if !api_username || (api_key.user.username_lower == api_username.downcase)
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elsif api_username
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User.find_by(username_lower: api_username.downcase)
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elsif user_id = header_api_key? ? @env[HEADER_API_USER_ID] : request["api_user_id"]
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User.find_by(id: user_id.to_i)
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elsif external_id = header_api_key? ? @env[HEADER_API_USER_EXTERNAL_ID] : request["api_user_external_id"]
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SingleSignOnRecord.find_by(external_id: external_id.to_s).try(:user)
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end
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if user && can_write?
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api_key.update_columns(last_used_at: Time.zone.now)
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end
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user
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end
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end
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private
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# By default we only allow headers for sending API credentials
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# However, in some scenarios it is essential to send them via url parameters
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# so we need to add some exceptions
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def api_parameter_allowed?
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request_method = @env["REQUEST_METHOD"]&.downcase&.to_sym
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request_format = @env['action_dispatch.request.formats']&.first&.symbol
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path_params = @env['action_dispatch.request.path_parameters']
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request_route = "#{path_params[:controller]}##{path_params[:action]}" if path_params
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PARAMETER_API_PATTERNS.any? do |p|
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(p[:method] == "*" || Array(p[:method]).include?(request_method)) &&
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(p[:format] == "*" || Array(p[:format]).include?(request_format)) &&
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(p[:route] == "*" || Array(p[:route]).include?(request_route))
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end
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end
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def header_api_key?
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!!@env[HEADER_API_KEY]
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end
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def rate_limit_admin_api_requests(api_key)
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return if Rails.env == "profile"
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RateLimiter.new(
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nil,
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"admin_api_min_#{ApiKey.hash_key(api_key)}",
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GlobalSetting.max_admin_api_reqs_per_key_per_minute,
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60
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).performed!
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end
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def can_write?
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@can_write ||= !Discourse.pg_readonly_mode?
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end
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end
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