1 files changed, 43 insertions, 0 deletions
diff --git a/lib/gitlab/content_security_policy/config_loader.rb b/lib/gitlab/content_security_policy/config_loader.rb
new file mode 100644
index 00000000000..ff844645b11
--- /dev/null
+++ b/lib/gitlab/content_security_policy/config_loader.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module ContentSecurityPolicy
+    class ConfigLoader
+      DIRECTIVES = %w(base_uri child_src connect_src default_src font_src
+                      form_action frame_ancestors frame_src img_src manifest_src
+                      media_src object_src report_uri script_src style_src worker_src).freeze
+
+      def self.default_settings_hash
+        {
+          'enabled' => false,
+          'report_only' => false,
+          'directives' => DIRECTIVES.each_with_object({}) { |directive, hash| hash[directive] = nil }
+        }
+      end
+
+      def initialize(csp_directives)
+        @csp_directives = HashWithIndifferentAccess.new(csp_directives)
+      end
+
+      def load(policy)
+        DIRECTIVES.each do |directive|
+          arguments = arguments_for(directive)
+
+          next unless arguments.present?
+
+          policy.public_send(directive, *arguments) # rubocop:disable GitlabSecurity/PublicSend
+        end
+      end
+
+      private
+
+      def arguments_for(directive)
+        arguments = @csp_directives[directive.to_s]
+
+        return unless arguments.present? && arguments.is_a?(String)
+
+        arguments.strip.split(' ').map(&:strip)
+      end
+    end
+  end
+end