From f1f95c4d99166bdb4a1d5d245acf91be4913adb7 Mon Sep 17 00:00:00 2001
From: Rodolphe Breard <rodolphe@what.tf>
Date: Fri, 15 Nov 2019 11:07:18 +0100
Subject: [PATCH] Display a more precise error message for unknown EC keys

---
 acme_common/src/crypto/openssl_keys.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/acme_common/src/crypto/openssl_keys.rs b/acme_common/src/crypto/openssl_keys.rs
index 368c4ce..3e5a93f 100644
--- a/acme_common/src/crypto/openssl_keys.rs
+++ b/acme_common/src/crypto/openssl_keys.rs
@@ -23,8 +23,11 @@ macro_rules! get_key_type {
             Id::EC => match $key.ec_key()?.group().curve_name() {
                 Some(Nid::X9_62_PRIME256V1) => KeyType::EcdsaP256,
                 Some(Nid::SECP384R1) => KeyType::EcdsaP384,
-                _ => {
-                    return Err("Unsupported EC key".into());
+                Some(nid) => {
+                    return Err(format!("{:?}: Unsupported EC key.", nid).into());
+                }
+                None => {
+                    return Err("None: Unsupported EC key".into());
                 }
             },
             _ => {