From 542a3b9b77cf6cc35ddc0523076365427fb24cff Mon Sep 17 00:00:00 2001
From: Nick Zana <me@nickzana.dev>
Date: Tue, 16 May 2023 19:15:29 -0400
Subject: [PATCH] ctap2-proto: Derive serde types for UsizeN

Just a wrapper struct around bounded_integer::BoundedUsize the
bounded_integer/serde1 feature needs to be enabled.
---
 crates/ctap2-proto/Cargo.toml                  | 2 +-
 crates/ctap2-proto/src/authenticator/device.rs | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/crates/ctap2-proto/Cargo.toml b/crates/ctap2-proto/Cargo.toml
index 5139203..64aa113 100644
--- a/crates/ctap2-proto/Cargo.toml
+++ b/crates/ctap2-proto/Cargo.toml
@@ -12,4 +12,4 @@ coset = "0.3.3"
 serde = { version = "1.0", features = ["derive"], optional = true }
 
 [features]
-serde = ["dep:serde", "fido-common/serde"]
+serde = ["dep:serde", "fido-common/serde", "bounded-integer/serde1"]
diff --git a/crates/ctap2-proto/src/authenticator/device.rs b/crates/ctap2-proto/src/authenticator/device.rs
index a861799..0fe6166 100644
--- a/crates/ctap2-proto/src/authenticator/device.rs
+++ b/crates/ctap2-proto/src/authenticator/device.rs
@@ -7,8 +7,12 @@ use std::collections::{BTreeMap, BTreeSet};
 use std::num::NonZeroUsize;
 use std::usize;
 
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+
 /// A usize with a minimum value of N
 #[derive(Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct UsizeN<const N: usize>(bounded_integer::BoundedUsize<N, { usize::MAX }>);
 
 /// > data type byte string and identifying the authenticator model, i.e.