From 59a56c4cf02bbf1efeda6c2a5893d5079db78ff3 Mon Sep 17 00:00:00 2001
From: Richard Levitte <levitte@openssl.org>
Date: Mon, 9 May 2016 21:52:11 +0200
Subject: [PATCH] Add NULL check in i2d_PrivateKey()

Originally submitted by Kurt Cancemi <kurt@x64architecture.com>

Closes RT#4533

Reviewed-by: Matt Caswell <matt@openssl.org>
---
 crypto/asn1/i2d_pr.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/crypto/asn1/i2d_pr.c b/crypto/asn1/i2d_pr.c
index 7ca643fb58..15b428eec1 100644
--- a/crypto/asn1/i2d_pr.c
+++ b/crypto/asn1/i2d_pr.c
@@ -69,10 +69,13 @@ int i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp)
     }
     if (a->ameth && a->ameth->priv_encode) {
         PKCS8_PRIV_KEY_INFO *p8 = EVP_PKEY2PKCS8(a);
-        int ret = i2d_PKCS8_PRIV_KEY_INFO(p8, pp);
-        PKCS8_PRIV_KEY_INFO_free(p8);
+        int ret = 0;
+        if (p8 != NULL) {
+            ret = i2d_PKCS8_PRIV_KEY_INFO(p8, pp);
+            PKCS8_PRIV_KEY_INFO_free(p8);
+        }
         return ret;
     }
     ASN1err(ASN1_F_I2D_PRIVATEKEY, ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
-    return (-1);
+    return -1;
 }
-- 
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