1 files changed, 26 insertions, 23 deletions

diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index d51d713..1569942 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -4,26 +4,29 @@
 # 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, inline scripts, and inline styles.
-#   config.content_security_policy_nonce_generator = ->(request) { request.session.id.to_s }
-#   config.content_security_policy_nonce_directives = %w(script-src style-src)
-#
-#   # Automatically add `nonce` to `javascript_tag`, `javascript_include_tag`, and `stylesheet_link_tag`
-#   # if the corresponding directives are specified in `content_security_policy_nonce_directives`.
-#   # config.content_security_policy_nonce_auto = true
-#
-#   # 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
+    policy.script_src     :self
+    policy.style_src      :self, :unsafe_inline
+    policy.img_src        :self, :data
+    policy.font_src       :self
+    policy.object_src     :none
+    policy.frame_ancestors :none
+    policy.base_uri       :self
+    policy.form_action    :self
+    policy.report_uri     "/csp_reports"
+  end
+
+  # Per-request nonce; script-src only. style-src keeps unsafe_inline
+  # deliberately: TinyMCE emits img[style] in body content and the
+  # public layout carries style attributes -- CSS injection is a
+  # low-yield channel, script-src is where the protection lives.
+  config.content_security_policy_nonce_generator  = ->(request) { SecureRandom.base64(16) }
+  config.content_security_policy_nonce_directives = %w[script-src]
+
+  # Report-only: nothing blocks. Enforcement is a later, deliberate
+  # flip once the reports have mapped reality (admin inline scripts,
+  # legacy hotlinked images in old bodies, embeds).
+  config.content_security_policy_report_only = true
+end