From 78167282f90937a4656d1e84ddbd3b37e877abc7 Mon Sep 17 00:00:00 2001
From: Fabian Kaczmarczyck <kaczmarczyck@google.com>
Date: Tue, 12 Jan 2021 19:11:32 +0100
Subject: [PATCH] comment for constants

---
 src/ctap/config_command.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ctap/config_command.rs b/src/ctap/config_command.rs
index e09bab3..19d0cc2 100644
--- a/src/ctap/config_command.rs
+++ b/src/ctap/config_command.rs
@@ -72,6 +72,7 @@ pub fn process_config(
         check_pin_uv_auth_protocol(pin_uv_auth_protocol)
             .map_err(|_| Ctap2StatusCode::CTAP2_ERR_PUAT_REQUIRED)?;
         let auth_param = pin_uv_auth_param.ok_or(Ctap2StatusCode::CTAP2_ERR_PUAT_REQUIRED)?;
+        // Constants are taken from the specification, section 6.11, step 4.2.
         let mut config_data = vec![0xFF; 32];
         config_data.extend(&[0x0D, sub_command as u8]);
         if let Some(sub_command_params) = sub_command_params.clone() {