+/**
+ * Generate a random Daily Tracing Key.
+ *
+ * The operation may fail under certain circumstances, such as if the
+ * HKDF operation fails for some reason.
+ *
+ * For internal use. It generally makes more sense to use the
+ * contrac_set_day_number() function instead.
+ *
+ * @param data The context object to work with.
+ * @return true if the operation completed successfully, false otherwise.
+ */