[PATCH] pki_crypto: Avoid segfault with OpenSSL 1.1.0

[Jakub Jelen <jjelen@xxxxxxxxxx>]

Hello,
this patch is an addition to the commit 954da14 which is trying to use
non-deprecated functions in OpenSSL 1.1.0.

But the newly function needs special allocation of the dsa structure
before, which was missing. See the attached patch (or on github [1]).

[1] https://github.com/Jakuje/libssh/commit/dcdba1a

Regards,
-- 
Jakub Jelen
Software Engineer
Security Technologies
Red Hat, Inc.

From dcdba1a9af16d07e2aefd12fff309730619a237a Mon Sep 17 00:00:00 2001
From: Jakub Jelen <jjelen@xxxxxxxxxx>
Date: Tue, 7 Nov 2017 09:38:40 +0100
Subject: [PATCH] pki_crypto: Avoid segfault with OpenSSL 1.1.0

Signed-off-by: Jakub Jelen <jjelen@xxxxxxxxxx>
---
 src/pki_crypto.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/pki_crypto.c b/src/pki_crypto.c
index 19821725..2a8e46ec 100644
--- a/src/pki_crypto.c
+++ b/src/pki_crypto.c
@@ -454,6 +454,10 @@ int pki_key_generate_rsa(ssh_key key, int parameter){
 int pki_key_generate_dss(ssh_key key, int parameter){
     int rc;
 #if OPENSSL_VERSION_NUMBER > 0x10100000L
+    key->dsa = DSA_new();
+    if (!key->dsa) {
+        return SSH_ERROR;
+    }
     rc = DSA_generate_parameters_ex(key->dsa,
                                     parameter,
                                     NULL,  /* seed */
-- 
2.13.6