SSL_LIB_VER_STR made sense only when ENABLE_CRYPTO also
existed. It can now be removed and thus simplify the code.
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <20171202134541.7688-4-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15951.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
ENABLE_PUSH_PEER_INFO depended on ENABLE_CRYPTO that now does
not exist anymore.
Get rid of ENABLE_PUSH_PEER_INFO by assuming that it is always
enabled and simplify the code.
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <20171202134541.7688-3-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15953.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
With this patch we remove the possibility to disable the crypto engine
(ENABLE_CRYPTO define) at configuration time.
[--disable-crypto has been removed from .travis.yml too]
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <20171203124952.15220-1-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15979.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
The crypto engine cannot be disabled anymore, therefore get
rid of all the related ifdefs in the code.
This change makes the code simpler and reduces our the
number of config combinations we have to test after a new
change is applied.
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <20171204010110.22091-1-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg16004.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
While openvpn.exe can run multiple concurrent processes, openvpnserv.exe
is usually only one single globally unique running process.
This patch extends openvpnserv.exe to support multiple service instances
in parallel allowing side-by-side OpenVPN installations.
Alternate instances must be installed as `SERVICE_WIN32_OWN_PROCESS`
(Type 0x10) and must use the newly introduced service command line
parameter:
-instance <name> <id>
<name> can be `automatic` or `interactive`.
- The service settings will be loaded from `HKLM\Software\OpenVPN<id>`
registry key.
- The automatic service will use `openvpn<id>_exit_1` exit event.
- The interactive service will accept requests on
`\\.\pipe\openvpn<id>\service` named pipe, and run IPC with
openvpn.exe on `\\.\pipe\openvpn<id>\service_<pid>`.
This patch preserves backward compatibility, by defaulting to
`SERVICE_WIN32_SHARE_PROCESS` and `<empty string>` as service ID.
Acked-by: Selva Nair <selva.nair@gmail.com>
Message-Id: <20171203211654.1044-1-simon@rozman.si>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg16002.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Data size arithmetic was reviewed according to 64-bit MSVC complaints.
The warnings were addressed by migrating to size_t, rewriting the code,
or silencing the warnings by an explicit cast where appropriate.
Acked-by: Selva Nair <selva.nair@gmail.com>
Message-Id: <20171203203007.6628-1-simon@rozman.si>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg16001.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
P_DATA_V2 introduced the peer-id. This allows clients to float, but as a
side-effect 32-bit aligns the encrypted data. That alignment improves
performance particularly on cheaper/older CPUs. So although servers don't
actually have a peer-id, still use the V2 packet format (with a zero-id)
for server->client traffic too.
Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1511531903-19349-1-git-send-email-steffan.karger@fox-it.com>
URL: https://www.mail-archive.com/search?l=mid&q=1511531903-19349-1-git-send-email-steffan.karger@fox-it.com
Signed-off-by: Gert Doering <gert@greenie.muc.de>
If gc == NULL, the data allocated in the alloc_gc_buf() call in
create_temp_file or the string_mod_const call in gen_path would never
be free'd.
These functions are currently never called that way, but let's prevent
future problems.
While touching create_temp_file, also remove the counter variable, which is
never read, simplify the do-while to a while loop, and truncate the prefix
(if needed) to preserve the random and extension of the created filename.
Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20171101220342.14648-5-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15703.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This function is called in response to connecting clients, and can fail
when I/O fails for some (possibly temporary) reason. In such cases we
should not exit the process, but just reject the connecting client.
This commit changes the function to actually return NULL on errors, and
(where needed) changes the callers to check for and handle errors.
Since the tls-crypt-v2 metadata code also calls create_temp_file() when
clients connect, I consider this a prerequisite for tls-crypt-v2.
Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20171101220342.14648-4-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15701.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This changes the behavior for pf plugins: instead of just not initializing
the firewall rules and happily continuing, this now rejects the client in
the case of an (unlikely) failure to initialize the pf.
Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20171101220342.14648-3-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15704.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
close_instance() tries to remove the file in c2.pf.filename, but that only
works if we actually set that if we fail. So, set that filename as soon
as we know we've created the file.
Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20171101220342.14648-2-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15705.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
I think this was omitted in 66bf378e.
Signed-off-by: Gert van Dijk <gert@gertvandijk.net>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20171111171406.7562-1-gert@gertvandijk.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15826.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This allows the user to specify what certificate crypto algorithms to
support. The supported profiles are 'preferred', 'legacy' (default) and
'suiteb', as discussed in <84590a17-1c48-9df2-c48e-4160750b2e33@fox-it.com>
(https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg14214.
html).
This fully implements the feature for mbed TLS builds, because for mbed it
is both more easy to implement and the most relevant because mbed TLS 2+
is by default somewhat restrictive by requiring 2048-bit+ for RSA keys.
For OpenSSL, this implements an approximation based on security levels, as
discussed at the hackathon in Karlsruhe.
This patch uses 'legacy' as the default profile following discussion on
the openvpn-devel mailing list. This way this patch can be applied to
both the release/2.4 and master branches. I'll send a follow-up patch for
the master branch to change the default to 'preferred' later.
Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20171112163636.17434-1-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15848.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
While we were suffering from the "TLS Renegotiation Slowdown" bug here
https://community.openvpn.net/openvpn/ticket/854 we realized that there is
still room for improvement in our use case.
It appears that TLS renegotiation is getting more and more expensive in
terms of CPU cycles with recent changes for more security. To make things
worse, we realized that most renegotiation procedures took place at almost
the same time and increased the CPU load too much during these periods.
That's especially true on large, multi-instance openvpn setups.
I've created attached patch to add a per session pseudo-random component to
the --reneg-sec intervals so that renegotiation is evenly spread over time.
It is configured by simply adding a second value to --reneg-sec as
described in the --help text:
--reneg-sec max [min] : Renegotiate data chan. key after at most max
(default=3600) and at least min (default 90% of max on
servers and equal to max on clients).
The jitter is only enabled by default on servers, because the actual reneg
time is min(reneg_server, reneg_client). Introducing jitter at both ends
would bias the actual reneg time to the min value.
Note that the patch also slightly changes the log output to show the sec
value in the same way as the bytes/pkts values:
TLS: soft reset sec=3084/3084 bytes=279897/-1 pkts=1370/0
The idea and first versions of this patch are from Simon Matter. Steffan
Karger later incorporated the mailing list comments into this patch. So
credits go to Simon, and all bugs are Steffan's fault ;-)
Signed-off-by: Simon Matter <simon.matter@invoca.ch>
Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20171116140958.12847-1-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15888.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
tun-ipv6 is a no-op nowadays, and we print a warning to let users know -
which is not helpful for server-pushed tun-ipv6 (which might be the
result of --server-ipv6 automatically pushing this). So, remove the
warning if parsing pushed options.
Also, remove the VERIFY_PERMISSION() call here which has side effects
on the "which class of options got pushed, do we need to act on them
later on?" flag set.
v2: use existing pull_mode flag
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20171111142230.3288-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/search?l=mid&q=20171111142230.3288-1-gert@greenie.muc.de
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Such a simple operation should not need a full function call.
Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20171110110858.11482-1-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15796.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Add a make target, such that 'make doxygen' works (both for in-tree and
out-of-tree builds). This now generates the doxygen in doc/doxygen/,
rather than in doxygen/.
While doing so, instead of genering docs with full path names (e.g.
/home/steffan/dev/openvpn/src/openvpn/crypto.h), use a relative path wrt
the project root (e.g. src/openvpn/crypto.h) in the generated
documentation. This makes the generated doxygen easier to read.
Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1510143174-15248-1-git-send-email-steffan.karger@fox-it.com>
URL: https://www.mail-archive.com/search?l=mid&q=1510143174-15248-1-git-send-email-steffan.karger@fox-it.com
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Before refactoring this function, add tests to verify the new
implementation.
While writing the tests, it became clear that this function is not
behaving very well. We'll fix that in follow-up commits.
Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20171104224551.3079-1-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15748.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This new README file describes how to use the new
openvpn-client@.service and openvpn-server@.service unit files properly.
The purpose of this file is primarily for all systemd based
distributions to have a common set of documentation.
Signed-off-by: David Sommerseth <davids@openvpn.net>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20170327221620.24639-1-davids@openvpn.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg14311.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Legacy _snwprintf() and snwprintf() functions replaced with ISO C
swprintf().
Assigning _snwprintf() return value to unused variable was also removed
at one occasion.
Acked-by: Selva Nair <selva.nair@gmail.com>
Message-Id: <20171013095008.8288-1-simon@rozman.si>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15633.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Authentication tokens are security enhancement eliminating client
need to cache passwords, and are indispensable at two factor
authentication methods, such as HOTP or TOTP.
The ">PASSWORD:Auth-Token" message was not mentioned anywhere in
the OpenVPN Management Interface Notes. This patch adds a simple use
case example, while the more detailed feature description remains
explained in the OpenVPN manual.
Acked-by: David Sommerseth <davids@openvpn.net>
Message-Id: <20171011134530.6676-1-simon@rozman.si>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15599.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
.h include files from the same folder or addressed relatively to the
same folder should be #included using quoted form in MSVC. The angled
form is reserved for include files from folders specified using /I
path.
Using angled form, MSVC fails to locate local #include file, unless
current folder is added to the include search path: /I .
Acked-by: Selva Nair <selva.nair@gmail.com>
Message-Id: <20171012103448.7632-1-simon@rozman.si>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15622.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
As per previous commit, this is a simple solution to cope with the
various sizes of time_t on different archs, including those that use 64
bits time_t on ILP32 archs to cope with y2038.
Also:
- convert the time_type/time_format abstraction that used unsigned long
to inlined long long code
- print suseconds_t as a long, which appears to be the underlying type
on most Unix systems around
Signed-off-by: Jeremie Courreges-Anglas <jca@wxcvbn.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <87k1zi18lt.fsf@ritchie.wxcvbn.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15667.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
time_t is only specified as an integer type per POSIX. To reliably
print it, better cast it to "long long", which is at least 64 bits wide
and can represent values beyond 2038.
Printing as a "long" could cause problems on ILP32 systems using a 64
bits time_t (eg OpenBSD/armv7).
Signed-off-by: Jeremie Courreges-Anglas <jca@wxcvbn.org>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <87efq4havl.fsf@ritchie.wxcvbn.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15640.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
In openssl 1.1, ENGINE_cleanup became a #define instead of a function
(because it's no longer needed as engines are self cleaning). Update
the autoconf.ac script to check for ENGINE_cleanup as a declaration to
avoid falsely undefinig HAVE_OPENSSL_ENGINE in openssl 1.1+
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <1509291288.3116.14.camel@HansenPartnership.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15676.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This rebase is done using the new lz4-rebaser.sh tool
The lz4 v1.7.5 is based on commit 7bb64ff2b69a9f8367 in
git://github.com/lz4/lz4
Signed-off-by: David Sommerseth <davids@openvpn.net>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20170221192737.24166-3-davids@openvpn.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg14137.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
In commit 59e7e9fce8 the contrib/keychain-mcd
code was completely removed. But it was not removed from Changes.rst.
Signed-off-by: David Sommerseth <davids@openvpn.net>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20171005212223.24694-1-davids@openvpn.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15561.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
- Use utf8to16 from common.c for utf8 to wide conversion and
check its return value
Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1508094315-466-1-git-send-email-selva.nair@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15641.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
- If only 1 byte is read from the interactive service client pipe, that
evaluates to zero wide characters and subsequent check for NUL
termination in the data buffer segfaults.
Fix: reject clients that send less than a complete wide character.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1508520356-18277-1-git-send-email-selva.nair@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15657.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Dynamically locating API function addresses at run-time using
GetProcAddress() was a leftover from the early days of the interactive
service development. It was required before `NTDDI_VERSION` was raised
from Windows XP to Windows Vista.
After NTDDI_VERSION API level was raised to NTDDI_VISTA, the direct
calling of Vista introduced API functions is possible and much
simpler.
This patch simplifies the code while in the same time it removes
controversial function type definitions that caused interactive service
not to compile on MSVC.
Acked-by: Selva Nair <selva.nair@gmail.com>
Message-Id: <20171012080720.7764-1-simon@rozman.si>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15614.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
In commit f91e4863bc we fixed an issue where LZ4_LIBS could be
overwritten in some situations. But on systems where lz4 is installed on
the system but is lacking pkg-config information, the linker will not know
about the lz4 library when completing the build.
This fixes the issue by explicitly setting LZ4_LIBS to contain -llz4
if pkg-config test was run and failed verifying the installed lz4 version
number. This also ensures that LZ4_LIBS will not be overwritten if it
has been provided on the ./configure command line.
Signed-off-by: David Sommerseth <davids@openvpn.net>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20171002190732.12531-1-davids@openvpn.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15549.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Older LZ4 library versions used a version number > 100 and not the
current x.y.z versioning scheme. This results in version 122 being
numberically higher than the check we have liblz4 > 1.7.1. And
since that old version (122) does not have the LZ4_compress_default(),
the building explodes later on.
This patch enhances the version check to also ensure the version
number is lower than 100. In addition the function checking we
had was not triggered if system library was found via pkg-config,
so this have now been reworked to really check if we have at least
two of the most important LZ4 functions - as long as a system
library have been found or been accepted via the LZ4_{CFLAGS,LIBS}
variables.
There are more ways to check for functions in autoconf. I opted
for AC_CHECK_LIB() instead of AC_CHECK_FUNC{,S}() as the latter
ones does not test if a function exists in a specific library. This
have the downside of needing to tests instead of AC_CHECK_FUNCS()
which could test for more functions in one go. We also do not
overwrite the LZ4_LIBS variable on success, as that could change
already set library paths (-L)
Finally, a stupid typo got fixed as well.
Trac: 939
Signed-off-by: David Sommerseth <davids@openvpn.net>
Tested-by: Richard Bonhomme <fragmentux@gmail.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20171002161812.9376-1-davids@openvpn.net>
URL: https://www.mail-archive.com/search?l=mid&q=20171002161812.9376-1-davids@openvpn.net
Signed-off-by: Gert Doering <gert@greenie.muc.de>
In particular, this eliminates the message that says "explicit-exit-notify
is ignored by previous <connection> blocks" when the option is pushed.
Note: pull_mode is identified as "allowed & OPT_P_PULL_MODE" matching
with the definition in add_options().
Reported by: Eike Lohmann e.lohmann@ic3s.dehttps://www.mail-archive.com/openvpn-users@lists.sourceforge.net/msg04052.h
tml
v2: move the check to verify_permissions() as suggested by
Gert <gert@greenie.muc.de>
Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <1505501175-9016-1-git-send-email-selva.nair@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15452.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Commit 3d6a4cded2 introduced checking for "too many parameters"
at option processing, and neglected to take "ipv6only" as possible
(and optional) argument to "--bind" into account.
Trac: #938
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20170928031620.22331-1-hashiz@meridiani.jp>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15522.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
We are using a deprecated function, LZ4_compress_limitedOutput(), which
will be removed with time. The correct function to use is
LZ4_compress_default(). Both function takes the same number of
arguments and data types, so the change is minimal.
This patch will also enforce the system LZ4 library to be at least v1.7.1.
If the system library is not found or it is older, it will be build using
the bundled LZ4 library. The version number requirement is based on the
LZ4 version we ship.
The changes in configure.ac for the version check is modelled around the
same approach we use for OpenSSL. Plus it does a few minor reformats and
improvements to comply with more recommend autoconf coding style.
This patch is a result of the discussions in this mail thread:
https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg14135.html
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20170907172004.22534-1-davids@openvpn.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15396.html
Signed-off-by: David Sommerseth <davids@openvpn.net>
The bounds check in read_key() was performed after using the value, instead
of before. If 'key-method 1' is used, this allowed an attacker to send a
malformed packet to trigger a stack buffer overflow.
Fix this by moving the input validation to before the writes.
Note that 'key-method 1' has been replaced by 'key method 2' as the default
in OpenVPN 2.0 (released on 2005-04-17), and explicitly deprecated in 2.4
and marked for removal in 2.5. This should limit the amount of users
impacted by this issue.
CVE: 2017-12166
Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Acked-by: David Sommerseth <davids@openvpn.net>
Message-Id: <80690690-67ac-3320-1891-9fecedc6a1fa@fox-it.com>
URL: https://www.mail-archive.com/search?l=mid&q=80690690-67ac-3320-1891-9fecedc6a1fa@fox-it.com
Signed-off-by: David Sommerseth <davids@openvpn.net>
Systemd supervises services it has started and can act upon unexpected
scenarios. This change will restart OpenVPN after 5 seconds if the OpenVPN
process exits unexpectedly.
The on-failure mode is the recommended mode by upstream systemd.
This change have been tested on a test server for some month, and it
works indeed as intended when provoking the OpenVPN process to stop.
Signed-off-by: David Sommerseth <davids@openvpn.net>
Acked-by: David Sommerseth <davids@openvpn.net>
Message-Id: <20170906235202.26551-1-davids@openvpn.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15370.html
Signed-off-by: David Sommerseth <davids@openvpn.net>
Commit 23d61c56 introduced the AF_UNSPEC socket family
to be used when we don't know the actual one until the local
socket binding is performed.
In such case AF_UNSPEC is stored in the `ce.af` member of
the `c->options` object, indicating that the family has to be
determined at runtime.
However, the determined value is never propagated back to the
`options` object, which remains AF_UNSPEC and that is
later used to initialize the TCP children contexts (UDP
children contexts are unaffected).
This unexpected setting can trigger weird behaviours, like
the one reported in ticket #933.
In this case the value AF_UNSPEC in combination with the
changes implemented in 2bed089d are leading to a TCP
server quitting with M_FATAL upon client connection.
Note that the misbehaviour described in #933 can only be
triggered when running a TCP server with mtu-disc set
in the config (no matter the value).
Fix this inconsistency by always propagating the AF
family from the top to the child context when running
in TCP server mode.
As a direct consequence, this patch fixes Trac #933.
Trac: 933
Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20170907095530.15972-1-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15380.html
Signed-off-by: David Sommerseth <davids@openvpn.net>
By default, when systemd is stopping OpenVPN it will send the SIGTERM
to all processes within the same process control-group. This can come
as a surprise to plug-ins which may have fork()ed out child processes.
So we tell systemd to only send the SIGTERM signal to the main OpenVPN
process and let OpenVPN take care of the shutdown process on its own.
If the main OpenVPN process does not stop within 90 seconds (unless
changed), it will send SIGKILL to all remaining processes within
the same process control-group.
This issue have been reported in both Debian and Fedora.
Trac: 581
Message-Id: <20170906234705.26202-1-davids@openvpn.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15369.html
Signed-off-by: David Sommerseth <davids@openvpn.net>
[DS: Applied lazy-ack policy]
* safe bet to say that server admins are better at updating their configs
than client users are and if client do want to restrict their ciphers,
they should simply evict the ciphers they don't want from their cipher
suite
* mbed TLS and OpenSSL behave more similar with the
SSL_OP_CIPHER_SERVER_PREFERENCE flag
Signed-off-by: Szilárd Pfeiffer <coroner@pfeifferszilard.hu>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <20170904081012.1975-1-coroner@pfeifferszilard.hu>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15356.html
Signed-off-by: David Sommerseth <davids@openvpn.net>
If specified in a tls-client context, don't try to open the file as it's
not used. Worse even, if 'none' was specified to disable explicitly, it
complained that the file 'none' could not be found.
[DS: On-the-fly update - Prefixed the message with 'WARNING: ']
Signed-off-by: Gert van Dijk <gert@gertvandijk.net>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: David Sommerseth <davids@openvpn.net>
Message-Id: <20170827161515.2424-1-gert@gertvandijk.net>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15332.html
Signed-off-by: David Sommerseth <davids@openvpn.net>
!A || (A && B) is equivalent to the simpler !A || B
therefore it is preferable to use the second version as
it is simpler to parse while reading the code.
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: David Sommerseth <davids@openvpn.net>
Message-Id: <20170824075547.29844-1-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15313.html
Signed-off-by: David Sommerseth <davids@openvpn.net>
