The Tracker was using direct callbacks to ipnlocal. This PR moves those
to be triggered via the eventbus.
Additionally, the eventbus is now closed on exit from tailscaled
explicitly, and health is now a SubSystem in tsd.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Also add a trailing newline to error banners so that SSH client messages don't print on the same line.
Updates tailscale/corp#29138
Signed-off-by: Percy Wegmann <percy@tailscale.com>
In tailssh.go:1284, (*sshSession).startNewRecording starts a fire-and-forget goroutine that can
outlive the test that triggered its creation. Among other things, it uses ss.logf, and may call it
after the test has already returned. Since we typically use (*testing.T).Logf as the logger,
this results in a data race and causes flaky tests.
Ideally, we should fix the root cause and/or use a goroutines.Tracker to wait for the goroutine
to complete. But with the release approaching, it's too risky to make such changes now.
As a workaround, we update the tests to use tstest.WhileTestRunningLogger, which logs to t.Logf
while the test is running and disables logging once the test finishes, avoiding the race.
While there, we also fix TestSSHAuthFlow not to use log.Printf.
Updates #15568
Updates #7707 (probably related)
Signed-off-by: Nick Khyl <nickk@tailscale.com>
Although, at the moment, we do not yet require an event bus to be present, as
we start to add more pieces we will want to ensure it is always available. Add
a new constructor and replace existing uses of new(tsd.System) throughout.
Update generated files for import changes.
Updates #15160
Change-Id: Ie5460985571ade87b8eac8b416948c7f49f0f64b
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
Some clients don't request 'none' authentication. Instead, they immediately supply
a password or public key. This change allows them to do so, but ignores the supplied
credentials and authenticates using Tailscale instead.
Updates #14922
Signed-off-by: Percy Wegmann <percy@tailscale.com>
This fork golang.org/x/crypto/ssh (at upstream x/crypto git rev e47973b1c1)
into tailscale.com/tempfork/sshtest/ssh so we can hack up the client in weird
ways to simulate other SSH clients seen in the wild.
Two changes were made to the files when they were copied from x/crypto:
* internal/poly1305 imports were replaced by the non-internal version;
no code changes otherwise. It didn't need the internal one.
* all decode-with-passphrase funcs were deleted, to avoid
using the internal package x/crypto/ssh/internal/bcrypt_pbkdf
Then the tests passed.
Updates #14969
Change-Id: Ibf1abebfe608c75fef4da0255314f65e54ce5077
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The upstream crypto package now supports sending banners at any time during
authentication, so the Tailscale fork of crypto/ssh is no longer necessary.
github.com/tailscale/golang-x-crypto is still needed for some custom ACME
autocert functionality.
tempfork/gliderlabs is still necessary because of a few other customizations,
mostly related to TTY handling.
Originally implemented in 46fd4e58a2,
which was reverted in b60f6b849a to
keep the change out of v1.80.
Updates #8593
Signed-off-by: Percy Wegmann <percy@tailscale.com>
This reverts commit 46fd4e58a2.
We don't want to include this in 1.80 yet, but can add it back post 1.80.
Updates #8593
Signed-off-by: Percy Wegmann <percy@tailscale.com>
The upstream crypto package now supports sending banners at any time during
authentication, so the Tailscale fork of crypto/ssh is no longer necessary.
github.com/tailscale/golang-x-crypto is still needed for some custom ACME
autocert functionality.
tempfork/gliderlabs is still necessary because of a few other customizations,
mostly related to TTY handling.
Updates #8593
Signed-off-by: Percy Wegmann <percy@tailscale.com>
When we first made Tailscale SSH, we assumed people would want public
key support soon after. Turns out that hasn't been the case; people
love the Tailscale identity authentication and check mode.
In light of CVE-2024-45337, just remove all our public key code to not
distract people, and to make the code smaller. We can always get it
back from git if needed.
Updates tailscale/corp#25131
Updates golang/go#70779
Co-authored-by: Percy Wegmann <percy@tailscale.com>
Change-Id: I87a6e79c2215158766a81942227a18b247333c22
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The v2 endpoint supports HTTP/2 bidirectional streaming and acks for
received bytes. This is used to detect when a recorder disappears to
more quickly terminate the session.
Updates https://github.com/tailscale/corp/issues/24023
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
This adds a new generic result type (motivated by golang/go#70084) to
try it out, and uses it in the new lineutil package (replacing the old
lineread package), changing that package to return iterators:
sometimes over []byte (when the input is all in memory), but sometimes
iterators over results of []byte, if errors might happen at runtime.
Updates #12912
Updates golang/go#70084
Change-Id: Iacdc1070e661b5fb163907b1e8b07ac7d51d3f83
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Add logic to set environment variables that match the SSH rule's
`acceptEnv` settings in the SSH session's environment.
Updates https://github.com/tailscale/corp/issues/22775
Signed-off-by: Mario Minardi <mario@tailscale.com>
this commit changes usermetrics to be non-global, this is a building
block for correct metrics if a go process runs multiple tsnets or
in tests.
Updates #13420
Updates tailscale/corp#22075
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
cmd/k8s-operator,k8s-operator/sessionrecording,sessionrecording,ssh/tailssh: refactor session recording functionality
Refactor SSH session recording functionality (mostly the bits related to
Kubernetes API server proxy 'kubectl exec' session recording):
- move the session recording bits used by both Tailscale SSH
and the Kubernetes API server proxy into a shared sessionrecording package,
to avoid having the operator to import ssh/tailssh
- move the Kubernetes API server proxy session recording functionality
into a k8s-operator/sessionrecording package, add some abstractions
in preparation for adding support for a second streaming protocol (WebSockets)
Updates tailscale/corp#19821
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
Previously, we were registering TCP and UDP connections in the same map,
which could result in erroneously removing a mapping if one of the two
connections completes while the other one is still active.
Add a "proto string" argument to these functions to avoid this.
Additionally, take the "proto" argument in LocalAPI, and plumb that
through from the CLI and add a new LocalClient method.
Updates tailscale/corp#20600
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I35d5efaefdfbf4721e315b8ca123f0c8af9125fb
In prep for it being required in more places.
Updates #11874
Change-Id: Ib743205fc2a6c6ff3d2c4ed3a2b28cac79156539
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This PR removes calls to ioutil library and replaces them
with their new locations in the io and os packages.
Fixes#9034
Updates #5210
Signed-off-by: Marwan Sulaiman <marwan@tailscale.com>
There are two race conditions in output handling.
The first race condition is due to a misuse of exec.Cmd.StdoutPipe.
The documentation explicitly forbids concurrent use of StdoutPipe
with exec.Cmd.Wait (see golang/go#60908) because Wait will
close both sides of the pipe once the process ends without
any guarantees that all data has been read from the pipe.
To fix this, we allocate the os.Pipes ourselves and
manage cleanup ourselves when the process has ended.
The second race condition is because sshSession.run waits
upon exec.Cmd to finish and then immediately proceeds to call ss.Exit,
which will close all output streams going to the SSH client.
This may interrupt any asynchronous io.Copy still copying data.
To fix this, we close the write-side of the os.Pipes after
the process has finished (and before calling ss.Exit) and
synchronously wait for the io.Copy routines to finish.
Fixes#7601
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
Co-authored-by: Maisem Ali <maisem@tailscale.com>
58ab66ec51 added LDAP support
for #4945 by shelling out to getdent.
It was supposed to fall back to the old method when getdent wasn't
found, but some variable name confusion (uid vs username) meant the
old path wasn't calling the right lookup function (user.LookupId
instead of user.Lookup).
Which meant that changed probably also broke FreeBSD and macOS SSH
support in addition to the reported OpenWRT regression.
The gokrazy support didn't look right either.
Fixes#8180
Change-Id: I273bbe96fe98b2517fbf0335fd476b483c051554
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This change sends an SSHEventNotificationRequest over noise when a
SSH session is set to fail closed and the session is unable to start
because a recorder is not available or a session is terminated because
connection to the recorder is ended. Each of these scenarios have their
own event type.
Updates tailscale/corp#9967
Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
This is part of an effort to clean up tailscaled initialization between
tailscaled, tailscaled Windows service, tsnet, and the mac GUI.
Updates #8036
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This adds support to try dialing out to multiple recorders each
with a 5s timeout and an overall 30s timeout. It also starts respecting
the actions `OnRecordingFailure` field if set, if it is not set
it fails open.
Updates tailscale/corp#9967
Signed-off-by: Maisem Ali <maisem@tailscale.com>
Previously it would dial out using the http.DefaultClient, however that doesn't work
when tailscaled is running in userspace mode (e.g. when testing).
Updates tailscale/corp#9967
Signed-off-by: Maisem Ali <maisem@tailscale.com>
This change focuses on the backend log ID, which is the mostly commonly
used in the client. Tests which don't seem to make use of the log ID
just use the zero value.
Signed-off-by: Will Norris <will@tailscale.com>
This updates all source files to use a new standard header for copyright
and license declaration. Notably, copyright no longer includes a date,
and we now use the standard SPDX-License-Identifier header.
This commit was done almost entirely mechanically with perl, and then
some minimal manual fixes.
Updates #6865
Signed-off-by: Will Norris <will@tailscale.com>
As backup plan, just in case the earlier fix's logic wasn't correct
and we want to experiment in the field or have users have a quicker
fix.
Updates #5285
Change-Id: I7447466374d11f8f609de6dfbc4d9a944770826d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The //go:build syntax was introduced in Go 1.17:
https://go.dev/doc/go1.17#build-lines
gofmt has kept the +build and go:build lines in sync since
then, but enough time has passed. Time to remove them.
Done with:
perl -i -npe 's,^// \+build.*\n,,' $(git grep -l -F '+build')
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
If the username includes a suffix of +password, then we accept
password auth and just let them in like it were no auth.
This exists purely for SSH clients that get confused by seeing success
to their initial auth type "none".
Co-authored-by: Maisem Ali <maisem@tailscale.com>
Change-Id: I616d4c64d042449fb164f615012f3bae246e91ec
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Alex Chan
Claus Lensbøl
Percy Wegmann
Nick Khyl
David Anderson
M. J. Fromberger
Brad Fitzpatrick
Andrew Lytvynov
Mario Minardi
Kristoffer Dalby
Irbe Krumina
Andrew Dunham
Joe Tsai
Marwan Sulaiman
Charlotte Brandhorst-Satzkorn
Maisem Ali
Will Norris