From f997e456b9bd43af275aab90c727a52287467e98 Mon Sep 17 00:00:00 2001
From: Dan Campbell <dan@ws0w.com>
Date: Thu, 4 Apr 2019 15:15:33 -0600
Subject: [PATCH] s_client starttls: fix handling of multiline reply

Fixes #8645

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8654)
---
 apps/s_client.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/s_client.c b/apps/s_client.c
index bb4f0aab16..282d137b58 100644
--- a/apps/s_client.c
+++ b/apps/s_client.c
@@ -2277,7 +2277,7 @@ int s_client_main(int argc, char **argv)
             do {
                 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
             }
-            while (mbuf_len > 3 && mbuf[3] == '-');
+            while (mbuf_len > 3 && (!isdigit(mbuf[0]) || !isdigit(mbuf[1]) || !isdigit(mbuf[2]) || mbuf[3] != ' '));
             (void)BIO_flush(fbio);
             BIO_pop(fbio);
             BIO_free(fbio);