107 lines
3.4 KiB
Ruby
107 lines
3.4 KiB
Ruby
# frozen_string_literal: true
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require 'content_security_policy'
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class ContentSecurityPolicy
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class Default
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attr_reader :directives
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def initialize(base_url:)
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@base_url = base_url
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@directives = {}.tap do |directives|
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directives[:upgrade_insecure_requests] = [] if SiteSetting.force_https
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directives[:base_uri] = [:self]
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directives[:object_src] = [:none]
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directives[:script_src] = script_src
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directives[:worker_src] = worker_src
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directives[:report_uri] = report_uri if SiteSetting.content_security_policy_collect_reports
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directives[:frame_ancestors] = frame_ancestors if restrict_embed?
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directives[:manifest_src] = ["'self'"]
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end
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end
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private
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def base_url
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@base_url
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end
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SCRIPT_ASSET_DIRECTORIES = [
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# [dir, can_use_s3_cdn, can_use_cdn, for_worker]
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['/assets/', true, true, true],
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['/brotli_asset/', true, true, true],
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['/extra-locales/', false, false, false],
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['/highlight-js/', false, true, false],
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['/javascripts/', false, true, true],
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['/plugins/', false, true, true],
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['/theme-javascripts/', false, true, false],
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['/svg-sprite/', false, true, false],
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]
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def script_assets(base = base_url, s3_cdn = GlobalSetting.s3_asset_cdn_url.presence || GlobalSetting.s3_cdn_url, cdn = GlobalSetting.cdn_url, worker: false)
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SCRIPT_ASSET_DIRECTORIES.map do |dir, can_use_s3_cdn, can_use_cdn, for_worker|
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next if worker && !for_worker
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if can_use_s3_cdn && s3_cdn
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s3_cdn + dir
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elsif can_use_cdn && cdn
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cdn + Discourse.base_path + dir
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else
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base + dir
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end
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end.compact
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end
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def script_src
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[
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"#{base_url}/logs/",
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"#{base_url}/sidekiq/",
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"#{base_url}/mini-profiler-resources/",
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*script_assets
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].tap do |sources|
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sources << :report_sample if SiteSetting.content_security_policy_collect_reports
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sources << :unsafe_eval if Rails.env.development? # TODO remove this once we have proper source maps in dev
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# Support Ember CLI Live reload
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if Rails.env.development?
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sources << "#{base_url}/ember-cli-live-reload.js"
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sources << "#{base_url}/_lr/"
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end
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# we need analytics.js still as gtag/js is a script wrapper for it
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sources << 'https://www.google-analytics.com/analytics.js' if SiteSetting.ga_universal_tracking_code.present?
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sources << 'https://www.googletagmanager.com/gtag/js' if SiteSetting.ga_universal_tracking_code.present? && SiteSetting.ga_version == "v4_gtag"
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if SiteSetting.gtm_container_id.present?
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sources << 'https://www.googletagmanager.com/gtm.js'
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sources << "'nonce-#{ApplicationHelper.google_tag_manager_nonce}'"
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end
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if SiteSetting.splash_screen
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sources << "'#{SplashScreenHelper.fingerprint}'"
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end
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end
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end
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def worker_src
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[
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"'self'", # For service worker
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*script_assets(worker: true)
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]
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end
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def report_uri
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"#{base_url}/csp_reports"
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end
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def frame_ancestors
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[
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"'self'",
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*EmbeddableHost.pluck(:host).map { |host| "https://#{host}" }
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]
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end
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def restrict_embed?
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SiteSetting.content_security_policy_frame_ancestors &&
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!SiteSetting.embed_any_origin
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end
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end
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end
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