From fe56d8e8a3665dc7e6784e0c170f790e6df8153f Mon Sep 17 00:00:00 2001
From: David Benjamin <davidben@google.com>
Date: Mon, 7 Mar 2016 09:57:58 -0500
Subject: [PATCH] RT 4393: Call EC_GROUP_order_bits in priv2opt.
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The private key is a scalar and should be sized by the order, not the
degree. See RFC 5915.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
---
 crypto/ec/ec_key.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/ec/ec_key.c b/crypto/ec/ec_key.c
index d241154630..f7948ccab2 100644
--- a/crypto/ec/ec_key.c
+++ b/crypto/ec/ec_key.c
@@ -607,7 +607,7 @@ size_t ec_key_simple_priv2oct(const EC_KEY *eckey,
 {
     size_t buf_len;
 
-    buf_len = (EC_GROUP_get_degree(eckey->group) + 7) / 8;
+    buf_len = (EC_GROUP_order_bits(eckey->group) + 7) / 8;
     if (eckey->priv_key == NULL)
         return 0;
     if (buf == NULL)
-- 
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