From 1e05c6d07ff963107286d028f6778d2ccc863a9a Mon Sep 17 00:00:00 2001
From: Matt Caswell <matt@openssl.org>
Date: Fri, 19 Jan 2018 14:48:45 +0000
Subject: [PATCH] Don't crash on a missing Subject in index.txt

An index.txt entry which has an empty Subject name field will cause ca
to crash. Therefore check it when we load it to make sure its not empty.

Fixes #5109

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5114)
---
 apps/ca.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/apps/ca.c b/apps/ca.c
index 551d0aa2f8..9b1d9bdaac 100644
--- a/apps/ca.c
+++ b/apps/ca.c
@@ -663,6 +663,10 @@ end_of_options:
                 goto end;
             }
         }
+        if (pp[DB_name][0] == '\0') {
+            BIO_printf(bio_err, "entry %d: bad Subject\n", i + 1);
+            goto end;
+        }
     }
     if (verbose) {
         TXT_DB_write(bio_out, db->db);
-- 
2.34.1