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Steffan Karger d728ebeda8 Add options to restrict cipher negotiation 
Add --ncp-disable to completely disable cipher negotiation, and
--ncp-ciphers to specify which ciphers to accept from the server.

v2:
 * fix --disable-crypto builds
 * use register_signal() instead of operating directly on c->sig
 * add man-page entry for new options

v3:
 * rebased on client-side NCP v3

v4:
 * rebased on client-side NCP v4

Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1467149700-10042-1-git-send-email-steffan@karger.me>
URL: http://article.gmane.org/gmane.network.openvpn.devel/12008
Signed-off-by: Gert Doering <gert@greenie.muc.de>
2016-07-11 21:45:52 +02:00
..
doxygen Remove ENABLE_SSL define (and --disable-ssl configure option) 2014-12-31 17:36:54 +01:00
android.txt Update android documentation to match source code 2016-07-11 20:54:23 +02:00
keying-material-exporter.txt Added document for TLS Keying Material Exporters [RFC-5705] 2015-10-10 00:03:07 +02:00
Makefile.am build: integrate plugins build into core build 2012-06-26 11:29:02 +02:00
management-notes.txt extend management interface command "state" 2015-11-28 14:24:23 +01:00
openvpn.8 Add options to restrict cipher negotiation 2016-07-11 21:45:52 +02:00
README.plugins build: integrate plugins build into core build 2012-06-26 11:29:02 +02:00

README.plugins 

OpenVPN Plugins
---------------

Starting with OpenVPN 2.0-beta17, compiled plugin modules are
supported on any *nix OS which includes libdl or on Windows.
One or more modules may be loaded into OpenVPN using
the --plugin directive, and each plugin module is capable of
intercepting any of the script callbacks which OpenVPN supports:

(1) up
(2) down
(3) route-up
(4) ipchange
(5) tls-verify
(6) auth-user-pass-verify
(7) client-connect
(8) client-disconnect
(9) learn-address

See the openvpn-plugin.h file in the top-level directory of the
OpenVPN source distribution for more detailed information
on the plugin interface.

Included Plugins
----------------

auth-pam -- Authenticate using PAM and a split privilege
            execution model which functions even if
            root privileges or the execution environment
            have been altered with --user/--group/--chroot.
            Tested on Linux only.

down-root -- Enable the running of down scripts with root privileges
             even if --user/--group/--chroot have been used
             to drop root privileges or change the execution
             environment.  Not applicable on Windows.

examples -- A simple example that demonstrates a portable
            plugin, i.e. one which can be built for *nix
            or Windows from the same source.

Building Plugins
----------------

cd to the top-level directory of a plugin, and use the
"make" command to build it.  The examples plugin is
built using a build script, not a makefile.