Acked-by: Gert Doering <g...@greenie.muc.de>
I have added two new cases to my server test suite: client with
"--data-ciphers none" and "--ncp-disable --cipher none", against
a server instance that permits "none" as part of its data-ciphers.
The first case failed on the client side ("unrecognized
cipher: none"), the second case was refused by the server side
("No common cipher... client supports cipher '[null-cipher]').
Of course the server side *also* needs the patch to accept
"none" as part of --data-ciphers :-)
Then, this works:
2020-10-04 15:04:28 us=208824 2001:608:4:0:669a:56c1:4175:2c5b peer info:
IV_CIPHERS=none
2020-10-04 15:04:28 us=251968 Data Channel: using negotiated cipher 'none'
2020-10-04 15:04:28 us=252006 ******* WARNING *******: '--cipher none' was ...
The warning in the logs is very clear and explicit - and I think
this is good. This is a very special-use setting, and should
only be used with sufficient information and consideration.
Big IPv4 packets (t_client test with 3000 bytes) do not work - something
is wrong in our mtu/overhead calcululation. But this is not something
new (as the v3 commit message rightly points out) - if I do "client
connects with --data-cipher DES-EDE3-CBC" (non AEAD) I get the same
TCP/UDP packet too large on write to ... (tried=1544,max=1542)
error as I have with "none" (there, it is tried=1529,max=1526). Strange
enough this only happens for IPv4 packets.
Your patch has been applied to the master and release/2.5 branch.
commit c018fc00be25aee5921d234531f87753a3a7aec7 (master)
commit f308251acdc539acb370aeccf46b0ec5587129c1 (release/2.5)
Author: Arne Schwabe
Date: Thu Oct 8 13:59:59 2020 +0200
Allow 'none' cipher being specified in --data-ciphers
Signed-off-by: Arne Schwabe <a...@rfc2549.org>
Acked-by: Gert Doering <g...@greenie.muc.de>
Message-Id: <20201008115959.21151-1-a...@rfc2549.org>
URL:
https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg21181.html
Signed-off-by: Gert Doering <g...@greenie.muc.de>
--
kind regards,
Gert Doering
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