From 61d81bda871bf3b8d0a54aa4561c1b13b6819139 Mon Sep 17 00:00:00 2001
From: Shimun <shimun@shimun.net>
Date: Tue, 7 Jan 2020 21:59:38 +0100
Subject: [PATCH] Make device pin-protocol support optional

---
 src/lib.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 1d7acd0..038709e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -145,7 +145,12 @@ impl FidoDevice {
         if !response.versions.iter().any(|ver| ver == "FIDO_2_0") {
             Err(FidoErrorKind::DeviceUnsupported)?
         }
-        if !response.pin_protocols.iter().any(|ver| *ver == 1) {
+        // Require pin protocol version 1, only if pin-protocol is supported at all
+        if !response
+            .pin_protocols
+            .iter()
+            .fold(true, |supported, ver| *ver == 1 && supported)
+        {
             Err(FidoErrorKind::DeviceUnsupported)?
         }
         self.needs_pin = response.options.client_pin == Some(true);