2009-08-04 15:35:42 +00:00
|
|
|
From 6b55d3e74400c9f7e71739abd0dac362a5db1dc6 Mon Sep 17 00:00:00 2001
|
2009-06-24 16:43:44 +00:00
|
|
|
From: aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>
|
|
|
|
Date: Fri, 6 Mar 2009 20:27:02 +0000
|
2009-08-04 15:35:42 +00:00
|
|
|
Subject: [PATCH] Fix bug in TLS authentication ("Daniel P. Berrange")
|
2009-06-24 16:43:44 +00:00
|
|
|
|
|
|
|
This patch was previously posted here:
|
|
|
|
|
|
|
|
http://lists.gnu.org/archive/html/qemu-devel/2009-02/msg00820.html
|
|
|
|
|
|
|
|
In the case where the TLS handshake does *not* block on I/O, QEMU
|
|
|
|
sends the next 'start sub-auth' message twice. This seriously confuses
|
|
|
|
the VNC client :-) Fortunately the chances of the handshake not blocking
|
|
|
|
are close to zero for a TCP socket, which is why it has not been noticed
|
|
|
|
thus far. Even with both client & server on localhost, I can only hit the
|
|
|
|
bug 1 time in 20.
|
|
|
|
|
|
|
|
NB, the diff context here is not too informative. If you look at the
|
|
|
|
full code you'll see that a few lines early we called vnc_start_tls()
|
|
|
|
which called vnc_continue_handshake() which called the method
|
|
|
|
start_auth_vencrypt_subauth(). Hence, fixing the bug, just involves
|
|
|
|
removing the 2nd bogus call to start_auth_vencrypt_subauth() as per
|
|
|
|
this patch.
|
|
|
|
|
|
|
|
(cherry picked from commit adc5ec856c557f75adc60b310e5b1d38210a289c)
|
|
|
|
|
|
|
|
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
|
|
|
|
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
|
|
|
|
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
|
2009-08-04 15:35:42 +00:00
|
|
|
Fedora-patch: 01-tls-handshake-fix.patch
|
2009-06-24 16:43:44 +00:00
|
|
|
---
|
|
|
|
vnc.c | 8 --------
|
|
|
|
1 files changed, 0 insertions(+), 8 deletions(-)
|
|
|
|
|
|
|
|
diff --git a/vnc.c b/vnc.c
|
2009-08-04 15:35:42 +00:00
|
|
|
index 1d8ebe7..d6a7225 100644
|
2009-06-24 16:43:44 +00:00
|
|
|
--- a/vnc.c
|
|
|
|
+++ b/vnc.c
|
|
|
|
@@ -2105,14 +2105,6 @@ static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len
|
2009-04-02 01:07:39 +00:00
|
|
|
VNC_DEBUG("Failed to complete TLS\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
-
|
|
|
|
- if (vs->wiremode == VNC_WIREMODE_TLS) {
|
|
|
|
- VNC_DEBUG("Starting VeNCrypt subauth\n");
|
|
|
|
- return start_auth_vencrypt_subauth(vs);
|
|
|
|
- } else {
|
|
|
|
- VNC_DEBUG("TLS handshake blocked\n");
|
|
|
|
- return 0;
|
|
|
|
- }
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
2009-06-24 16:43:44 +00:00
|
|
|
--
|
2009-08-04 15:35:42 +00:00
|
|
|
1.6.2.5
|
2009-06-24 16:43:44 +00:00
|
|
|
|