124 lines
4.7 KiB
Ruby
124 lines
4.7 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module ContentSecurityPolicy
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class ConfigLoader
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DIRECTIVES = %w(base_uri child_src connect_src default_src font_src
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form_action frame_ancestors frame_src img_src manifest_src
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media_src object_src report_uri script_src style_src worker_src).freeze
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def self.default_enabled
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Rails.env.development? || Rails.env.test?
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end
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def self.default_directives
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directives = {
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'default_src' => "'self'",
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'base_uri' => "'self'",
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'connect_src' => "'self'",
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'font_src' => "'self'",
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'form_action' => "'self' https: http:",
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'frame_ancestors' => "'self'",
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'frame_src' => "'self' https://www.google.com/recaptcha/ https://www.recaptcha.net/ https://content.googleapis.com https://content-compute.googleapis.com https://content-cloudbilling.googleapis.com https://content-cloudresourcemanager.googleapis.com",
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'img_src' => "'self' data: blob: http: https:",
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'manifest_src' => "'self'",
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'media_src' => "'self'",
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'script_src' => "'strict-dynamic' 'self' 'unsafe-inline' 'unsafe-eval' https://www.google.com/recaptcha/ https://www.recaptcha.net https://apis.google.com",
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'style_src' => "'self' 'unsafe-inline'",
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'worker_src' => "'self' blob: data:",
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'object_src' => "'none'",
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'report_uri' => nil
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}
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# frame-src was deprecated in CSP level 2 in favor of child-src
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# CSP level 3 "undeprecated" frame-src and browsers fall back on child-src if it's missing
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# However Safari seems to read child-src first so we'll just keep both equal
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directives['child_src'] = directives['frame_src']
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# connect_src with 'self' includes https/wss variations of the origin,
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# however, safari hasn't covered this yet and we need to explicitly add
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# support for websocket origins until Safari catches up with the specs
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allow_websocket_connections(directives)
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allow_webpack_dev_server(directives) if Rails.env.development?
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allow_cdn(directives, Settings.gitlab.cdn_host) if Settings.gitlab.cdn_host.present?
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allow_customersdot(directives) if Rails.env.development? && ENV['CUSTOMER_PORTAL_URL'].present?
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allow_sentry(directives) if Gitlab.config.sentry&.enabled && Gitlab.config.sentry&.clientside_dsn
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directives
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end
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def initialize(csp_directives)
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@csp_directives = HashWithIndifferentAccess.new(csp_directives)
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end
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def load(policy)
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DIRECTIVES.each do |directive|
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arguments = arguments_for(directive)
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next unless arguments.present?
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policy.public_send(directive, *arguments) # rubocop:disable GitlabSecurity/PublicSend
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end
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end
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private
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def arguments_for(directive)
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arguments = @csp_directives[directive.to_s]
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return unless arguments.present? && arguments.is_a?(String)
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arguments.strip.split(' ').map(&:strip)
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end
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def self.allow_websocket_connections(directives)
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http_ports = [80, 443]
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host = Gitlab.config.gitlab.host
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port = Gitlab.config.gitlab.port
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secure = Gitlab.config.gitlab.https
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protocol = secure ? 'wss' : 'ws'
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ws_url = "#{protocol}://#{host}"
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unless http_ports.include?(port)
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ws_url = "#{ws_url}:#{port}"
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end
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append_to_directive(directives, 'connect_src', ws_url)
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end
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def self.allow_webpack_dev_server(directives)
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secure = Settings.webpack.dev_server['https']
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host_and_port = "#{Settings.webpack.dev_server['host']}:#{Settings.webpack.dev_server['port']}"
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http_url = "#{secure ? 'https' : 'http'}://#{host_and_port}"
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ws_url = "#{secure ? 'wss' : 'ws'}://#{host_and_port}"
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append_to_directive(directives, 'connect_src', "#{http_url} #{ws_url}")
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end
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def self.allow_cdn(directives, cdn_host)
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append_to_directive(directives, 'script_src', cdn_host)
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append_to_directive(directives, 'style_src', cdn_host)
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append_to_directive(directives, 'font_src', cdn_host)
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end
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def self.append_to_directive(directives, directive, text)
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directives[directive] = "#{directives[directive]} #{text}".strip
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end
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def self.allow_customersdot(directives)
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customersdot_host = ENV['CUSTOMER_PORTAL_URL']
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append_to_directive(directives, 'frame_src', customersdot_host)
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end
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def self.allow_sentry(directives)
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sentry_dsn = Gitlab.config.sentry.clientside_dsn
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sentry_uri = URI(sentry_dsn)
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sentry_uri.user = nil
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append_to_directive(directives, 'connect_src', sentry_uri.to_s)
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end
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end
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end
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end
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