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8353ae8075
By default OpenSSL 1.1+ only allows signatures and ecdh/ecdhx from the
default list of X25519:secp256r1:X448:secp521r1:secp384r1. In
TLS1.3 key exchange is independent from the signature/key of the
certificates, so allowing all groups per default is not a sensible
choice anymore and instead a shorter list is reasonable.
However, when using certificates with exotic curves that are not on
the group list, the signatures of these certificates will no longer
be accepted.
The tls-groups option allows to modify the group list to account
for these corner cases.
Patch V2: Uses local gc_arena instead of malloc/free, reword commit
message. Fix other typos/clarify messages
Patch V3: Style fixes, adjust code to changes from mbedTLS session
fix
Patch V5: Fix compilation with OpenSSL 1.0.2
Patch V6: Redo the 'while((token = strsep(&tmp_groups, ":"))' change
which accidentally got lost.
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20200721154922.17144-1-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg20521.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
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|---|---|---|
| .. | ||
| doxygen | ||
| man-sections | ||
| android.txt | ||
| interactive-service-notes.rst | ||
| keying-material-exporter.txt | ||
| Makefile.am | ||
| management-notes.txt | ||
| openvpn.8.rst | ||
| README.man | ||
| README.plugins | ||
| tls-crypt-v2.txt | ||
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.