From c0088c4eae0b74eb8c70ec8364d8fc0ccf7aa11c Mon Sep 17 00:00:00 2001
From: Heiko Schaefer <heiko@schaefer.name>
Date: Mon, 20 Sep 2021 20:36:37 +0200
Subject: [PATCH] Hack for SmartPGP applet (use the last of the suitable
 algorithm variants from the Algorithm Information list).

---
 openpgp-card/src/keys.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/openpgp-card/src/keys.rs b/openpgp-card/src/keys.rs
index 18987de..4ed766a 100644
--- a/openpgp-card/src/keys.rs
+++ b/openpgp-card/src/keys.rs
@@ -320,7 +320,10 @@ fn get_card_algo_rsa(
 
     // Did we find a suitable algorithm entry?
     if !algo.is_empty() {
-        Ok((*algo[0]).clone())
+        // HACK: The SmartPGP applet reports two variants of RSA (import
+        // format 1 and 3), but in fact only supports the second variant.
+        // Using the last option happens to work better, in that case.
+        Ok((**algo.last().unwrap()).clone())
     } else {
         // RSA with this bit length is not in algo_list
         return Err(anyhow!(