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52 lines
2 KiB
Ruby
52 lines
2 KiB
Ruby
# Be sure to restart your server when you modify this file.
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# Define an application-wide content security policy
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# For further information see the following documentation
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# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
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ActiveSupport::Reloader.to_prepare do
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Rails.application.config.content_security_policy do |policy|
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policy.default_src :self, :https
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policy.base_uri :self
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policy.font_src :self, :https, :data
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policy.img_src :self, :https, :data, :blob
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policy.object_src :none
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policy.script_src :self, :unsafe_eval, *Extends::EXTERNAL_SERVICES
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policy.style_src :self, :https, :unsafe_inline, :data
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policy.connect_src :self, :data, *Extends::EXTERNAL_SERVICES
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# Specify URI for violation reports
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# policy.report_uri "/csp-violation-report-endpoint"
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end
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end
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# https://discuss.rubyonrails.org/t/turbolinks-broken-by-default-with-a-secure-csp/74790
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Rails.application.config.content_security_policy_nonce_generator = -> (request) do
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# use the same csp nonce for turbolinks requests
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if request.env['HTTP_TURBOLINKS_REFERRER'].present?
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request.env['HTTP_X_TURBOLINKS_NONCE']
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else
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return request.session.id.to_s if request&.session&.id.present?
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SecureRandom.base64(16)
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end
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end
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# Set the nonce only to specific directives
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Rails.application.config.content_security_policy_nonce_directives = %w(script-src)
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# Report CSP violations to a specified URI
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# For further information see the following documentation:
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# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only
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# Rails.application.config.content_security_policy_report_only = true
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# Whitelist AWS buckets
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Rails.application.configure do
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config.after_initialize do
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if ActiveStorage::Blob.service.name == :amazon
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Extends::EXTERNAL_SERVICES += [ActiveStorage::Blob.service.bucket.url]
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Rails.application.config.content_security_policy.connect_src :self, :data, *Extends::EXTERNAL_SERVICES
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end
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end
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end
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