tailscale

Commit Graph

Author	SHA1	Message	Date
Joe Tsai	61886e031e	ssh/tailssh: fix double race condition with non-pty command (#8405 ) 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>	1 year ago
Brad Fitzpatrick	a4fd4fd845	ssh/tailssh: fix regression after LDAP support `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>	2 years ago
Brad Fitzpatrick	58ab66ec51	ssh/tailssh: support LDAP users for Tailscale SSH Fixes #4945 Change-Id: Ie013cb47684cb87928a44f92c66352310bfe53f1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Charlotte Brandhorst-Satzkorn	68307c1411	ssh/tailssh: send ssh event notifications on recording failures 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>	2 years ago
Brad Fitzpatrick	6e967446e4	tsd: add package with System type to unify subsystem init, discovery 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>	2 years ago
Maisem Ali	7778d708a6	ssh/tailssh: handle dialing multiple recorders and failing open 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>	2 years ago
Maisem Ali	d42d570066	ssh/tailssh: handle output matching better in tests (#7799 )	2 years ago
Maisem Ali	5ba57e4661	ssh/tailssh: add tests for recording failure Updates tailscale/corp#9967 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	09d0b632d4	ssh/tailssh: add session recording test for non-pty sessions Updates tailscale/corp#9967 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	583e86b7df	ssh/tailssh: handle session recording when running in userspace mode 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>	2 years ago
Maisem Ali	8a246487c2	ssh/tailssh: enable recording of non-pty sessions Updates tailscale/corp#9967 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Will Norris	57a008a1e1	all: pass log IDs as the proper type rather than strings 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>	2 years ago
Brad Fitzpatrick	b1248442c3	all: update to Go 1.20, use strings.CutPrefix/Suffix instead of our fork Updates #7123 Updates #5309 Change-Id: I90bcd87a2fb85a91834a0dd4be6e03db08438672 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	04b57a371e	ipn/ipnlocal: drop not required StateKey parameter This is #cleanup now that #7121 is merged. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	5bba65e978	net/memnet: rename from net/nettest This is just #cleanup to resolve a TODO Also add a package doc. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Will Norris	71029cea2d	all: update copyright and license headers 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>	2 years ago
Brad Fitzpatrick	651e0d8aad	ssh/tailssh: add envknob for default PATH 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>	2 years ago
Brad Fitzpatrick	56f7da0cfd	ssh/tailssh: set default Tailscale SSH $PATH for non-interactive commands Fixes #5285 Co-authored-by: Andrew Dunham <andrew@tailscale.com> Change-Id: Ic7e967bf6a53b056cac5f21dd39565d9c31563af Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	4d330bac14	ipn/ipnlocal: add support for multiple user profiles Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	da8def8e13	all: remove old +build tags 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>	2 years ago
Brad Fitzpatrick	e24de8a617	ssh/tailssh: add password-forcing workaround for buggy SSH clients 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>	2 years ago
Maisem Ali	4de1601ef4	ssh/tailssh: add support for sending multiple banners Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	ecf6cdd830	ssh/tailssh: add TestSSHAuthFlow Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	6a396731eb	all: use various net/netip parse funcs directly Mechanical change with perl+goimports. Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then goimports -d . Finally, removed the net/netaddr wrappers, to prevent future use. Updates #5162 Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	480fd6c797	ssh/tailssh: handle not-authenticated-yet connections in matchRule Also make more fields in conn.info thread safe, there was previously a data race here. Fixes #5110 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	c434e47f2d	ssh/tailssh: always use current time for policy evaluation Whenever the SSH policy changes we revaluate all open connections to make sure they still have access. This check was using the wrong timestamp and would match against expired policies, however this really isn't a problem today as we don't have policy that would be impacted by this check. Fixing it for future use. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	a7d2024e35	ssh/tailssh: allow multiple sessions on the same conn Fixes #4920 Fixes tailscale/corp#5633 Updates #4479 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
James Tucker	c2eff20008	ssh/tailssh: avoid user ssh configuration in tests Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Brad Fitzpatrick	8ac4d52b59	ssh/tailssh: filter accepted environment variables Noted by @danderson Updates #3802 Change-Id: Iac70717ed57f11726209ac1ea93ddc6696605f94 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	2b8b887d55	ssh/tailssh: send banner messages during auth, move more to conn (VSCode Live Share between Brad & Maisem!) Updates #3802 Change-Id: Id8edca4481b0811debfdf56d4ccb1a46f71dd6d3 Co-Authored-By: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	f74ee80abe	ssh/tailssh: support expansions in public key fetch URL too Updates #3802 Change-Id: I5aa98bdab14fd1c1c00ba63b93f8d7e670f72437 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	14d077fc3a	ssh/tailssh: terminate ssh auth early if no policy can match Also bump github.com/tailscale/golang-x-crypto/ssh Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	93221b4535	ssh/tailssh: cache public keys fetched from URLs Updates #3802 Change-Id: I96715bae02bce6ea19f16b1736d1bbcd7bcf3534 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	da14e024a8	tailcfg, ssh/tailssh: optionally support SSH public keys in wire policy And clean up logging. Updates #3802 Change-Id: I756dc2d579a16757537142283d791f1d0319f4f0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5a44f9f5b5	tempfork: temporarily fork gliderlabs/ssh and x/crypto/ssh While we rearrange/upstream things. gliderlabs/ssh is forked into tempfork from our prior fork at `be8b7add40` x/crypto/ssh OTOH is forked at https://github.com/tailscale/golang-x-crypto because it was gnarlier to vendor with various internal packages, etc. Its git history shows where it starts (2c7772ba30643b7a2026cbea938420dce7c6384d). Updates #3802 Change-Id: I546e5cdf831cfc030a6c42557c0ad2c58766c65f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	091ea4a4a5	ssh/tailssh: support placeholders in SSHAction.HoldAndDelegate URL Updates #3802 Change-Id: I60f9827409d14fd4f4824d102ba11db49bf0d365 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	f7e976db55	tailcfg, ssh/tailssh: make SSHUser value '=' map ssh-user to same local-user Updates #3802 Change-Id: Icde60d4150ca15c25d615a4effb3d3c236f020a8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	32fd42430b	all: use cibuild.On Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Maisem Ali	b775df0b57	ssh/tailssh_test: skip TestSSH/stdin in CI Updates #4051 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	1e12a29806	ssh/tailssh_test: Skip the env test in CI Updates #4051 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	6e86bbcb06	ssh/tailssh: add a new sshSession type to clean up existing+future code Updates #3802 Change-Id: I7054dca387f5e5aee1185937ecf41b77a5a07f1a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Co-authored-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	da6ce27416	go.mod: move from github.com/gliderlabs/ssh to github.com/tailscale/ssh Updates #4146 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	56bf2ce642	ssh/tailssh: handle local port forwarding Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	06c147d848	ssh/tailssh: create login sessions for new connections Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	c9a5dadce8	ssh/tailssh: skip flaky test on CI for now Updates #4051 Change-Id: I94f2165dd248eba9ca3f782c907a13bd6dde4a5e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	497324ddf6	ipn/store: add common package for instantiating ipn.StateStores Also move KubeStore and MemStore into their own package. RELNOTE: tsnet now supports providing a custom ipn.StateStore. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	4b50977422	ssh/tailssh: add more SSH tests, blend in env from ssh session Updates #3802 Change-Id: I568c661cacbb0524afcd8be9577457ddba611f19 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6e4f3614cf	ssh/tailssh: add start of real ssh tests Updates #3802 Change-Id: I9aea4250062d3a06ca7a5e71a81d31c27a988615 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c9eca9451a	ssh: make it build on darwin For local dev testing initially. Product-wise, it'll probably only be workable on the two unsandboxed builds. Updates #3802 Change-Id: Ic352f966e7fb29aff897217d79b383131bf3f92b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago

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52 Commits (1fcae420552d0a2d6a2fbb2d40fb62a126451fc2)