This introduces experimental support for Wintun
as an alternative for tap-windows6.
In order to use wintun, set "ClientAPI::Config::wintun"
flag to "true" or use "-w" option in test client.
Signed-off-by: Lev Stipakov <lev@openvpn.net>
Packaging OpenVPN 3 Linux on Debian reports this warning:
openvpn3-core/client/ovpncli.cpp:1380:27: warning: macro "__DATE__" might prevent reproducible builds [-Wdate-time]
ret += " built on " __DATE__ " " __TIME__;
Reproducible builds is something which will come arrive in more
distributions, as it is a good way to verify that binary builds contains
the expected source code and has not been mangled by the packager.
This changes the current behaviour and will not provide the date/time
stamps unless the OPENVPN_DEBUG macro has been set. Enabling this
macro will re-enable the date/time stamp reporting via
OpenVPNClient::platform().
Signed-off-by: David Sommerseth <davids@openvpn.net>
In TLS 1.3 the RSA-PSS padding is required in addition to the
traditional PKCS1 padding used in TLS 1.2 and below. Add an
argument to the external sign function to signal what padding
is required. As quirkyness OpenSSL calls out requesting a NONE
padding instead of RSA-PASS.
We might need to move from RSA_method to EVP_PKEY_method in the
future.
Signed-off-by: Arne Schwabe <arne@openvpn.net>
On Android local networks need to be excluded from the default (or any
other route) route if they should bypass the VPN. This adds a callback
to specifically bypass the local LAN networks.
On the linux client we need the information to which remote the client
is connecting to query the route information to ultimately discover the
device. On other platform that do not need these extra information we
ignore the extra arguments
The API uses std::string and bool instead of passing of passing IPAddr as
the API needs to be understand by Swig/Java and similar methods also opt in
favour of call by value and simply types.
Signed-off-by: Arne Schwabe <arne@openvpn.net>
Platforms like UWP and iOS may call core methods
from another threads. Since core is not thread-safe,
we provide OPENVPN_ASYNC_HANDLER macro which instantiates
lock guard. It follows RAII principle and locks global
mutex in constructor and unlocks in destructor. This
guarantees that code in block protected with this macro
won't be called simultaneously from different threads.
Signed-off-by: Lev Stipakov <lev@openvpn.net>
// If true, consider AUTH_FAILED to be a non-fatal error,
// and retry the connection after a pause.
bool retryOnAuthFailed = false;
Signed-off-by: James Yonan <james@openvpn.net>
Added OPENVPN_OVPNCLI_ASYNC_SETUP flag, which causes most
of ClientAPI::OpenVPNClient::connect() setup to run as an
openvpn_io::post() handler. This is potentially useful in
i/o layer implementations to guarantee sequenced execution
of core setup and handlers.
Signed-off-by: James Yonan <james@openvpn.net>
To enable, #define OPENVPN_EXTERNAL_TUN_FACTORY
Then add override in your client class (that derives from
ClientAPI::OpenVPNClient):
virtual TunClientFactory* new_tun_factory(const ExternalTun::Config& conf, const OptionList& opt) override
{
...
}
Signed-off-by: James Yonan <james@openvpn.net>
* enabled by OPENVPN_OVPNCLI_SINGLE_THREAD compile flag.
* turns off the signal blocker.
* Adds overrideable clock_tick() virtual method with
configurable frequency that is used when processing
signals when the OpenVPN client is running in
single-thread mode.
Signed-off-by: James Yonan <james@openvpn.net>
Fixed some minor typos where state->session was used even
though a direct pointer to session was available.
Signed-off-by: James Yonan <james@openvpn.net>
Created a lightweight abstraction layer so that another i/o
reactor can be dropped in place of asio.
The basic approach is to rename all references to asio::xxx
types to openvpn_io::xxx and then make openvpn_io a
preprocessor variable that points to the top-level namespace
of the i/o reactor implementation.
All of the source files that currently include <asio.hpp> now
include <openvpn/io/io.hpp> instead:
This gives us a lightweight abstraction layer that allows us
to define openvpn_io to be something other than asio.
Other changes:
* Inclusion of asio by scripts/build is now optional, and is
enabled by passing ASIO=1 or ASIO_DIR=<dir>.
* Refactored openvpn/common/socktypes.hpp to no longer
require asio.
* Refactored openvpn/log/logthread.hpp to no longer require
asio.
* Added openvpn::get_hostname() method as alternative to
calling asio directly.
* openvpn/openssl/util/init.hpp will now #error
if USE_ASIO is undefined.
Signed-off-by: James Yonan <james@openvpn.net>
legacy -- allow 1024-bit RSA certs signed with SHA1
preferred -- require at least 2048-bit RSA certs signed
with SHA256 or higher
suiteb -- require NSA Suite-B
The current default is legacy.
The directive can be set in the profile or overridden/defaulted
in the client API via ClientAPI::Config::tlsCertProfileOverride
var.
TODO: implement for OpenSSL.
This patch builds on work by David Sommerseth <davids@openvpn.net>
to move the PolarSSL API from polarssl-1.3 to mbedtls-2.3, which
has significant differences in some areas.
- Strings containing keys, certificates, CRLs, and DH parameters
need to be NULL-terminated and the length argument provided to
the corresponding mbedtls parse function must be able to read
the NULL-terminator. These places have been modified with a
'+1' to the length argument (x509cert.hpp, x509crl.hpp, dh.hpp,
pkctx.hpp).
- The SSL context object has been split up in mbedtls-2.3
Now many of the SSL configurations are done in a separate
SSL config object, which is added to the SSL context once
configured. In addition private/public keys are now stored
in a separate pk_context, which is later on attached to the
SSL context. Due to this, many of the calls setting either
SSL configuration parameters or working with pk_contexts have
been refactored. (sslctx.hpp)
- The older API loading the CA chain took a hostname argument.
The new API requires mbedtls_ssl_set_hostname() explicitly to
be called setting hostname. Some refactoring was needed here
too (sslctx.hpp).
- x509_oid_get_description() is now replaced by
mbedtls_oid_get_extended_key_usage().
- when mbedTLS renamed OID_CMP to MBEDTLS_OID_CMP, the return
value was changed so that a return value of 0 now means equal
rather than not-equal.
- mbedtls/platform.h must be loaded before any other mbedtls
include files (sslchoose.hpp).
- All functions and macros related to mbedTLS are now prefixed
with mbedtls_/MBEDTLS_
- Refactored External PKI and added some options to cli.cpp
to make it easier to test that the feature still works
correctly. This included removing the sig_type var and
standardizing on a PKCS#1 digest prefix per RFC 3447.
- Updated test keys to 2048 bits.
- Updated dependency build scripts to build mbedTLS.
- Enable MD4 in mbedTLS build script (needed for NTLM auth).
- Use an allow-all X509 cert profile to preserve compatibility
with older configs. Going forward, we will implement new
options to increase strictness on minimum RSA key size and
required cert signing algs.
- Added human-readable reason strings that explain why
a given cert in the chain wasn't accepted.
- This patch doesn't rename any files or rename internal
OpenVPN 3 symbols such as PolarSSLContext. This will
be done in a separate commit.
Signed-off-by: James Yonan <james@openvpn.net>
channel messages using the new
ClientAPI::OpenVPNClient::post_cc_msg()
method:
// post control channel message
void post_cc_msg(const std::string& msg);
disconnect.
In ~ClientState() (ovpncli.cpp) added session.reset() to
ensure that ClientConnect object is fully destroyed before
the asio::io_context object. Not doing so can cause a
crash on Windows.
can provide a callback to return "remote" directive data
that overrides the "remote" directives in the config
file.
// Remote override callback (disabled by default).
virtual bool remote_override_enabled();
virtual void remote_override(RemoteOverride&);
ClientAPI::Private::ClientState in ovpncli.cpp to enhance
thread-safety in corner cases.
An async stop object (Stop*) can now be used as a triggering
event for disconnect. Further, C++ API clients can now
overload OpenVPNClient::get_async_stop() to provide their
own Stop object.
INFO,<payload>
Payload can be any UTF-8 printable string under 64 KB
(multiple lines are okay).
INFO notifications can be sent from server to client
in real-time, on any active client connection.
The client will attach the payload to an INFO event and
forward it to the controlling app via the event callback:
virtual void event(const Event&) = 0;
receive path to reassemble messages fragmented by the
SSL layer up to a max message size of 64 KB.
Ramifications:
* Peer info data and pushed options can be significantly
larger (i.e. approaching 64 KB).
* Less need for the options continuation feature.
Limitations:
* While this patch doesn't change the underlying OpenVPN
protocol, it can result in messages being sent that are
fragmented by the receiving SSL implementation into
multiple buffers. Implementations that lack reassembly
capabilities (such as OpenVPN 2.x at this point in time)
would see each buffer fragment as a separate message.
* This patch running on the server will break negotiation
with pre-peer-info clients. Basically this means it will
interoperate with any OpenVPN 3 version or OpenVPN 2.x
version that includes the June 2010 commit "Implemented a
key/value auth channel from client to server.
Version 2.1.1i".
(instead of 2):
(a) ordinary events such as CONNECTING, CONNECTED,
(b) nonfatal errors such as TRANSPORT_ERROR that will
automatically trigger a reconnect, and
(c) fatal errors such as AUTH_FAILED, that will be followed
by a DISCONNECT
In ClientAPI::Event, added a new "fatal" boolean to indicate
when errors are fatal.
Added a new non-fatal event TUN_ERROR that triggers a
reconnect when errors are indicated in tunio.hpp.
ClientAPI::Config::ipv6 string:
IPv6 preference
no -- disable IPv6, so tunnel will be IPv4-only
yes -- request combined IPv4/IPv6 tunnel
default (or empty string) -- leave decision to server
bool ClientAPI::Config::autologinSessions and default
to false. Previously, the logic was hardcoded to true.
Autologin Sessions can be enabled in the cli.cpp wrapper
using the -a flag.
ClientAPI::Config::gremlinConfig string.
The gremlin option allows extra packet latency
or unreliability to be added to the tunnel.
The format of the option is a comma-separated list
of numerical parameters:
send_delay_ms, recv_delay_ms, send_drop_prob, recv_drop_prob
Parameter description:
send_delay_ms : delay packets by n milliseconds before
transmission (UDP/TCP).
recv_delay_ms : delay received packets by n milliseconds
before processing them (UDP/TCP).
send_drop_prob : drop sent packets with probability 1/n
(UDP only).
recv_drop_prob : drop received packets with probability
1/n (UDP only).
Set any parameter to 0 to disable.
Gremlin parameters currently work with UDP and TCP
transport as documented above, but not for proxy transport.
Client must be built with the OPENVPN_GREMLIN flag to compile
gremlin functionality.
Command-line client can set the gremlin config
string using --gremlin or -G, for example:
--gremlin=250,250,64,64
When using the above parameters, an extra 500 milliseconds
will be added to round-trip latency, and 1/64 sent or
received packets will be dropped.
unless both logthread.hpp was included and logbase.hpp was NOT
included.
This change allows loggers other than
ClientAPI::OpenVPNClient::log() to be used with ovpn3 core.
interface management code into TunMac::Setup()
(tunsetup.hpp).
Added TunBuilderSetup::Config, Base, and Factory for use
as a unix-portable abstraction layer for tun interface
management code.
Added Stop object pointer to Mac OS X tun config
(TunMac::ClientConfig), so that tun management code can
detect stop commands if it's blocking outside of outer
asio::io_context.
data to the OpenVPN handshake (peer-info is a client -> server
key/value list that is part of the OpenVPN protocol). To
add peer-info key/value pairs, use ClientAPI::Config::peerInfo.
Incremented core OPENVPN_VERSION to "3.0.6".
