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Add an HTTP Content-Security-Policy #444

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Jul 14, 2020
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Add an HTTP Content-Security-Policy #444

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6 changes: 3 additions & 3 deletions app/views/layouts/application.html.erb
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Original file line number Diff line number Diff line change
Expand Up @@ -13,9 +13,9 @@
<%= yield :meta_tags %>
</head>
<body class="govuk-template__body">
<script>
<%= javascript_tag nonce: true do %>
document.body.className = ((document.body.className) ? document.body.className + ' js-enabled' : 'js-enabled');
</script>
<% end %>
<%= render "govuk_publishing_components/components/cookie_banner", {
title: t("cookies.banner.title"),
text: t("cookies.banner.text"),
Expand Down Expand Up @@ -75,6 +75,6 @@
]
}
} %>
<%= javascript_include_tag "application" %>
<%= javascript_include_tag "application", nonce: true %>
</body>
</html>
32 changes: 18 additions & 14 deletions config/initializers/content_security_policy.rb
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@@ -1,30 +1,34 @@
# frozen_string_literal: true

# Be sure to restart your server when you modify this file.

# Define an application-wide content security policy
# For further information see the following documentation
# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/
# Content-Security-Policy

# Rails.application.config.content_security_policy do |policy|
# policy.default_src :self, :https
# policy.font_src :self, :https, :data
# policy.img_src :self, :https, :data
# policy.object_src :none
# policy.script_src :self, :https
# policy.style_src :self, :https
Rails.application.config.content_security_policy do |policy|
policy.default_src :self, :https
policy.font_src :self, :https, :data
policy.img_src :self, :https, :data
policy.object_src :none
policy.script_src :self, :https, :data, "https://www.google-analytics.com"
policy.style_src :self, :https
policy.media_src :none
policy.child_src :self
policy.form_action :self
policy.frame_ancestors :self
policy.connect_src :none

# # Specify URI for violation reports
# # policy.report_uri "/csp-violation-report-endpoint"
# end
# # Specify URI for violation reports
# # policy.report_uri "/csp-violation-report-endpoint"
end

# If you are using UJS then enable automatic nonce generation
# Rails.application.config.content_security_policy_nonce_generator = ->
# request { SecureRandom.base64(16) }
Rails.application.config.content_security_policy_nonce_generator = ->(_request) { SecureRandom.base64(16) }

# Set the nonce only to specific directives
# Rails.application.config.content_security_policy_nonce_directives =
# %w(script-src)
Rails.application.config.content_security_policy_nonce_directives = %w[script-src]

# Report CSP violations to a specified URI
# For further information see the following documentation:
Expand Down