mastodon/config/initializers/content_security_policy.rb

118 lines
4.0 KiB
Ruby

# frozen_string_literal: true
# Be sure to restart your server when you modify this file.
# Define an application-wide content security policy.
# See the Securing Rails Applications Guide for more information:
# https://guides.rubyonrails.org/security.html#content-security-policy-header
def host_to_url(str)
return if str.blank?
uri = Addressable::URI.parse("http#{Rails.configuration.x.use_https ? 's' : ''}://#{str}")
uri.path += '/' unless uri.path.blank? || uri.path.end_with?('/')
uri.to_s
end
def sso_host
return unless ENV['ONE_CLICK_SSO_LOGIN'] == 'true'
return unless ENV['OMNIAUTH_ONLY'] == 'true'
return unless Devise.omniauth_providers.length == 1
provider = Devise.omniauth_configs[Devise.omniauth_providers[0]]
@sso_host ||= begin
case provider.provider
when :cas
provider.cas_url
when :saml
provider.options[:idp_sso_target_url]
when :openid_connect
provider.options.dig(:client_options, :authorization_endpoint) || OpenIDConnect::Discovery::Provider::Config.discover!(provider.options[:issuer]).authorization_endpoint
end
end
end
unless Rails.env.development?
assets_host = Rails.configuration.action_controller.asset_host || "https://#{ENV['WEB_DOMAIN'] || Rails.configuration.x.local_domain}"
data_hosts = [assets_host]
if ENV['S3_ENABLED'] == 'true' || ENV['AZURE_ENABLED'] == 'true'
attachments_host = host_to_url(ENV['S3_ALIAS_HOST'] || ENV['S3_CLOUDFRONT_HOST'] || ENV['AZURE_ALIAS_HOST'] || ENV['S3_HOSTNAME'] || "s3-#{ENV['S3_REGION'] || 'us-east-1'}.amazonaws.com")
elsif ENV['SWIFT_ENABLED'] == 'true'
attachments_host = ENV.fetch('SWIFT_OBJECT_URL')
attachments_host = "https://#{Addressable::URI.parse(attachments_host).host}"
else
attachments_host = nil
end
data_hosts << attachments_host unless attachments_host.nil?
if ENV['PAPERCLIP_ROOT_URL']
url = Addressable::URI.parse(assets_host) + ENV['PAPERCLIP_ROOT_URL']
data_hosts << "https://#{url.host}"
end
data_hosts.concat(ENV['EXTRA_DATA_HOSTS'].split('|')) if ENV['EXTRA_DATA_HOSTS']
data_hosts.uniq!
Rails.application.config.content_security_policy do |p|
p.base_uri :none
p.default_src :none
p.frame_ancestors :none
p.font_src :self, assets_host
p.img_src :self, :data, :blob, *data_hosts
p.style_src :self, assets_host
p.media_src :self, :data, *data_hosts
p.frame_src :self, :https
p.manifest_src :self, assets_host
if sso_host.present?
p.form_action :self, sso_host
else
p.form_action :self
end
p.child_src :self, :blob, assets_host
p.worker_src :self, :blob, assets_host
p.connect_src :self, :blob, :data, Rails.configuration.x.streaming_api_base_url, *data_hosts
p.script_src :self, assets_host, "'wasm-unsafe-eval'"
end
end
# Report CSP violations to a specified URI
# For further information see the following documentation:
# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only
# Rails.application.config.content_security_policy_report_only = true
Rails.application.config.content_security_policy_nonce_generator = ->(_request) { SecureRandom.base64(16) }
Rails.application.config.content_security_policy_nonce_directives = %w(style-src)
Rails.application.reloader.to_prepare do
PgHero::HomeController.content_security_policy do |p|
p.script_src :self, :unsafe_inline, assets_host
p.style_src :self, :unsafe_inline, assets_host
end
PgHero::HomeController.after_action do
request.content_security_policy_nonce_generator = nil
end
if Rails.env.development?
LetterOpenerWeb::LettersController.content_security_policy do |p|
p.child_src :self
p.connect_src :none
p.frame_ancestors :self
p.frame_src :self
p.script_src :unsafe_inline
p.style_src :unsafe_inline
p.worker_src :none
end
LetterOpenerWeb::LettersController.after_action do
request.content_security_policy_nonce_directives = %w(script-src)
end
end
end