325 lines
9.4 KiB
Ruby
325 lines
9.4 KiB
Ruby
# frozen_string_literal: true
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require_dependency "auth/current_user_provider"
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require_dependency "rate_limiter"
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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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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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# 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 = $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.blank? ? nil : @env[HEADER_API_KEY] || request[API_KEY]
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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 = UserAuthToken.lookup(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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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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Scheduler::Defer.later "Updating Last Seen" do
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u.update_last_seen!
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u.update_ip_address!(request.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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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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unstage_user(user)
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make_developer_admin(user)
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enable_bootstrap_mode(user)
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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 unstage_user(user)
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if user.staged
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user.unstage
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user.save
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end
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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 if Discourse.pg_readonly_mode?
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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_VISIBLE".freeze] == "true".freeze
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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.where(key: user_api_key, revoked_at: nil).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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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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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.where(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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if api_key.allowed_ips.present? && !api_key.allowed_ips.any? { |ip| ip.include?(request.ip) }
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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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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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end
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end
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private
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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_#{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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end
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