feat: Added nonce support

examples/demo/config/initializers/content_security_policy.rb

@@ -4,22 +4,22 @@
 # See the Securing Rails Applications Guide for more information:
 # https://guides.rubyonrails.org/security.html#content-security-policy-header
 
-# Rails.application.configure do
-#   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
-#     # Specify URI for violation reports
-#     # policy.report_uri "/csp-violation-report-endpoint"
-#   end
-#
-#   # Generate session nonces for permitted importmap and inline scripts
-#   config.content_security_policy_nonce_generator = ->(request) { request.session.id.to_s }
-#   config.content_security_policy_nonce_directives = %w(script-src)
-#
-#   # Report violations without enforcing the policy.
-#   # config.content_security_policy_report_only = true
-# end
+Rails.application.configure do
+  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, :strict_dynamic
+    policy.style_src :self, :https, :unsafe_inline
+    # Specify URI for violation reports
+    # policy.report_uri "/csp-violation-report-endpoint"
+  end
+
+  # Generate session nonces for permitted importmap and inline scripts
+  config.content_security_policy_nonce_generator = ->(request) { request.session.id.to_s }
+  config.content_security_policy_nonce_directives = %w[script-src]
+
+  # Report violations without enforcing the policy.
+  # config.content_security_policy_report_only = true
+end

lib/phraseapp-in-context-editor-ruby/view_helpers.rb

@@ -22,7 +22,7 @@ def load_in_context_editor(opts = {})
         }.merge(opts)
 
         snippet = <<-EOS
-        <script>
+        <script nonce='#{content_security_policy_nonce}'>
           window.PHRASEAPP_CONFIG = #{configuration.to_json};
           (function() {
             let phraseapp = document.createElement('script');