tailscale

Commit Graph

Author	SHA1	Message	Date
Andrew Dunham	13377e6458	ssh/tailssh: always assert our final uid/gid Move the assertions about our post-privilege-drop UID/GID out of the conditional if statement and always run them; I haven't been able to find a case where this would fail. Defensively add an envknob to disable this feature, however, which we can remove after the 1.40 release. Updates #7616 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Iaec3dba9248131920204bd6c6d34bbc57a148185	2 years ago
Andrew Dunham	9de8287d47	ssh/tailssh: lock OS thread during incubator This makes it less likely that we trip over bugs like golang/go#1435. Updates #7616 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ic28c03c3ad8ed5274a795c766b767fa876029f0e	2 years ago
Maisem Ali	c350cd1f06	ssh/tailssh: use background context for uploading recordings Otherwise we see errors like ``` ssh-session(sess-20230322T005655-5562985593): recording: error sending recording to <addr>:80: Post "http://<addr>:80/record": context canceled ``` The ss.ctx is closed when the session closes, but we don't want to break the upload at that time. Instead we want to wait for the session to close the writer when it finishes, which it is already doing. Updates tailscale/corp#9967 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	d92047cc30	ssh/tailssh: allow recorders to be configured on the first or final action Currently we only send down recorders in first action, allow the final action to replace them but not to drop them. Updates tailscale/corp#9967 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	7a97e64ef0	ssh/tailssh: add more metadata to recording header Updates tailscale/corp#9967 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	916aa782af	ssh/tailssh: stream SSH recordings to configured recorders Updates tailscale/corp#9967 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Andrew Dunham	39b289578e	ssh/tailssh: make uid an int instead of uint64 Follow-up to #7615 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib4256bff276f6d5cf95838d8e39c87b3643bde37	2 years ago
Andrew Dunham	ccace1f7df	ssh/tailssh: fix privilege dropping on FreeBSD; add tests On FreeBSD and Darwin, changing a process's supplementary groups with setgroups(2) will also change the egid of the process, setting it to the first entry in the provided list. This is distinct from the behaviour on other platforms (and possibly a violation of the POSIX standard). Because of this, on FreeBSD with no TTY, our incubator code would previously not change the process's gid, because it would read the newly-changed egid, compare it against the expected egid, and since they matched, not change the gid. Because we didn't use the 'login' program on FreeBSD without a TTY, this would propagate to a child process. This could be observed by running "id -p" in two contexts. The expected output, and the output returned when running from a SSH shell, is: andrew@freebsd:~ $ id -p uid andrew groups andrew However, when run via "ssh andrew@freebsd id -p", the output would be: $ ssh andrew@freebsd id -p login root uid andrew rgid wheel groups andrew (this could also be observed via "id -g -r" to print just the gid) We fix this by pulling the details of privilege dropping out into their own function and prepending the expected gid to the start of the list on Darwin and FreeBSD. Finally, we add some tests that run a child process, drop privileges, and assert that the final UID/GID/additional groups are what we expect. More information can be found in the following article: https://www.usenix.org/system/files/login/articles/325-tsafrir.pdf Updates #7616 Alternative to #7609 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I0e6513c31b121108b50fe561c89e5816d84a45b9	2 years ago
Maisem Ali	223713d4a1	tailcfg,all: add and use Node.IsTagged() Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	e69682678f	ssh/tailssh: use context.WithCancelCause It was using a custom implmentation of the context.WithCancelCause, replace usage with stdlib. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	0582829e00	ssh/tailssh: try launching commands with /usr/bin/login on macOS Updates #4939 Co-authored-by: Adam Eijdenberg <adam@continusec.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	5787989d74	ssh/tailssh: detect user shell correctly on darwin Updates #6213 Signed-off-by: Maisem Ali <maisem@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	1116602d4c	ssh/tailssh: add OpenBSD support for Tailscale SSH And bump go.mod for https://github.com/u-root/u-root/pull/2593 Change-Id: I36ec94c5b2b76d671cb739f1e9a1a43ca1d9d1b1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	be67b8e75b	ssh/tailssh: fix Tailscale SSH to non-root tailscaled Fix regression from `337c77964b` where tailscaled started calling Setgroups. Prior to that, SSH to a non-root tailscaled was working. Instead, ignore any failure calling Setgroups if the groups are already correct. Fixes #6888 Change-Id: I561991ddb37eaf2620759c6bcaabd36e0fb2a22d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	8047dfa2dc	ssh/tailssh: unify some of the incubator_* GOOS files into incubator.go In prep for fix for #6888 Change-Id: I79f780c6467a9b7ac03017b27d412d6b0d2f7e6b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	84eaef0bbb	ssh/tailssh: don't swallow process exit code in be-child Thanks to @nshalman and @Soypete for debugging! Updates #6054 Change-Id: I74550cc31f8a257b37351b8152634c768e1e0a8a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f837d179b9	ssh/tailssh: fix typo in error message "look up" is the verb. "lookup" is a noun. Change-Id: I81c99e12c236488690758fb5c121e7e4e1622a36 Signed-off-by: Brad Fitzpatrick <bradfitz@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	2d653230ef	ssh/tailssh: only call CloseWrite when both stdout and stderr are done Updates #5209 Signed-off-by: Maisem Ali <maisem@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
Pat Maddox	9bf3ef4167	ssh/tailssh: add Tailscale SSH (server) support on FreeBSD Change-Id: I607194b6ef99205e777f3df93a74ffe1a2e0344c Signed-off-by: Pat Maddox <pat@ratiopbc.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
Maisem Ali	1440742a1c	ssh/tailssh: use root / as cmd.Dir when users HomeDir doesn't exist Fixes #5224 Signed-off-by: Maisem Ali <maisem@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
Emmanuel T Odeke	680f8d9793	all: fix more resource leaks found by staticmajor Updates #5706 Signed-off-by: Emmanuel T Odeke <emmanuel@orijtech.com>	2 years ago
Maisem Ali	f172fc42f7	ssh/tailssh: close sshContext on context cancellation This was preventing tailscaled from shutting down properly if there were active sessions in certain states (e.g. waiting in check mode). Signed-off-by: Maisem Ali <maisem@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
Maisem Ali	f16b77de5d	ssh/tailssh: do the full auth flow during ssh auth Fixes #5091 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	b84ec521bf	ssh/tailssh: do not send EOT on session disconnection This was assumed to be the fix for mosh not working, however turns out all we really needed was the duplicate fd also introduced in the same commit (`af412e8874`). Fixes #5103 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	b1bd96f114	go.mod, ssh/tailssh: fix ImplictAuthMethod typo Fixes #5745 Change-Id: Ie8bc88bd465a9cb35b0ae7782d61ce96480473ee Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Josh Soref	d4811f11a0	all: fix spelling mistakes Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>	2 years ago
Eng Zer Jun	f0347e841f	refactor: move from io/ioutil to io and os packages The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit replaces the existing io/ioutil functions with their new definitions in io and os packages. Reference: https://golang.org/doc/go1.16#ioutil Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>	2 years ago
Brad Fitzpatrick	74674b110d	envknob: support changing envknobs post-init Updates #5114 Change-Id: Ia423fc7486e1b3f3180a26308278be0086fae49b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	4950fe60bd	syncs, all: move to using Go's new atomic types instead of ours Fixes #5185 Change-Id: I850dd532559af78c3895e2924f8237ccc328449d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	8725b14056	all: migrate more code code to net/netip directly Instead of going through the tailscale.com/net/netaddr transitional wrappers. Updates #5162 Change-Id: I3dafd1c2effa1a6caa9b7151ecf6edd1a3fda3dd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	02a765743e	ssh/tailssh: fix deadlock in expandDelegateURL Also rename it to expandDelegateURLLocked, previously it was trying to acquire the mutex while holding the mutex. Fixes #5235 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	a12aad6b47	all: convert more code to use net/netip directly perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.) perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. ) goimports -w . Then delete some stuff from the net/netaddr shim package which is no longer neeed. Updates #5162 Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8 Signed-off-by: Brad Fitzpatrick <bradfitz@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	3e06b9ea7a	ssh/tailssh: add "ssh" to conn logs Fixes #5089 Signed-off-by: Maisem Ali <maisem@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	af412e8874	ssh/tailssh: better handling of signals and exits We were not handling errors occurred while copying data between the subprocess and the connection. This makes it so that we pass the appropriate signals when to the process and the connection. This also fixes mosh. Updates #4919 Co-authored-by: James Tucker <raggi@tailscale.com> Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	3b1f99ded1	ssh/tailssh: fix Tailscale SSH to Linux Arch machines See https://github.com/tailscale/tailscale/issues/4924#issuecomment-1168201823 Arch uses a different login binary that makes the -h flag set the PAM service to "remote". So if they don't have that configured, don't pass -h. Thanks to @eddiezane for debugging! Updates #4924 Change-Id: I8d33e0afb2dfb99517bcea2f9d5d0c6247519b3c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	40503ef07a	ssh/tailssh: fix logging typo 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
Adam Eijdenberg	9294a14a37	ssh/tailssh: limit setgroups to 16 on macOS Fixes #4938 Signed-off-by: Adam Eijdenberg <adam@continusec.com>	2 years ago
Adam Eijdenberg	7f807fef6c	ssh/tailssh: fix /usr/bin/login args on macOS Fixes #4931 Signed-off-by: Adam Eijdenberg <adam@continusec.com>	2 years ago
Brad Fitzpatrick	e428bba7a3	ssh/tailssh: add metrics Updates #3802 Change-Id: Ic9a4b8c51cff6dfe148a1c78bc0e5074195b7f80 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	928530a112	ipn/ipnlocal: shutdown sshServer on tailscale down Also lazify SSHServer initialization to allow restarting the server on a subsequent `tailscale up` Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	575aacb1e2	ssh/tailssh: terminate sessions on stdout copy failures Currently, killing a SCP copy with a Ctrl+C leaves the session hanging even though the stdout copy goroutine fails with an io.EOF. Taking a step back, when we are unable to send any more data back to the client we should just terminate the session as the client will stop getting any response from the server anyways. Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	7cd8c3e839	ssh/tailssh: terminate sessions when tailscaled shutsdown Ideally we would re-establish these sessions when tailscaled comes back up, however we do not do that yet so this is better than leaking the sessions. Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	760740905e	ssh/tailssh: only use `login` with TTY sessions Otherwise, the shell exits immediately causing applications like mosh and VSCode to fail. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	5cd56fe8d5	ssh/tailssh: exec into `login` when launching a shell This has the added benefit of displaying the MOTD and reducing our dependency on the DBus interface. Fixes #4627 Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	a253057fc3	ssh/tailssh: refactor incubator flags Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	c1445155ef	ssh/tailssh: handle Control-C during hold-and-delegate prompt Fixes #4549 Change-Id: Iafc61af5e08cd03564d39cf667e940b2417714cc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	3012a2e1ca	ssh/tailssh,ipn/ipnlocal: terminate any active sessions on `up --ssh=false` Currently the ssh session isn't terminated cleanly, instead the packets are just are no longer routed to the in-proc SSH server. This makes it so that clients get a disconnection when the `RunSSH` pref changes to `false`. Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	910ae68e0b	util/mak: move tailssh's mapSet into a new package for reuse elsewhere Change-Id: Idfe95db82275fd2be6ca88f245830731a0d5aecf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	c2eff20008	ssh/tailssh: avoid user ssh configuration in tests Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
David Anderson	a364bf2b62	ssh/tailssh: various typo fixes, clarifications. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	c994eba763	ssh/tailssh: simplify matchRule with Reject rules Updates #3802 Change-Id: I59fe111eef5ac8abbcbcec922e293712a65a4830 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	31094d557b	ssh/tailssh: chmod the auth socket to be only user accessible Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	337c77964b	ssh/tailssh: set groups and gid in the incubated process Updates #3802 Signed-off-by: Maisem Ali <maisem@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
Brad Fitzpatrick	89832c1a95	tailcfg: fix typo in SessionDuration field name Noted by @danderson. Updates #3802 Change-Id: Ide15f3f28e30f6abb5c94d7dcd218bd9482752a0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	695f8a1d7e	ssh/tailssh: add support for sftp Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	5b4154342e	ssh/tailssh: fix double SSH-2.0- prefix in greeting banner gliderlabs/ssh was already adding the "SSH-2.0-" prefix. Updates #3802 Change-Id: I19a1cd9308371a2898e7883cf26e94c9b54bab29 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	8b81254992	ipn/ipnlocal: reject tailscale up --ssh if disabled on tailnet Updates #3802 Change-Id: I3f1e839391fe9b28270f506f4bb8d8e3d36716f5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	91a187bf87	ssh/tailssh: make checkStillValid also consider username changes Currently if the policy changes and the session is logged in with local user "u1" and the new policy says they can only login with "u2" now, the user doesn't get kicked out because they had requested `rando@<ssh-host>` and the defaulting had made that go to `u1`. 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	ade7bd8745	ssh/tailssh: close sessions on policy change if no longer allowed Updates #3802 Change-Id: I98503c2505b77ac9d0cc792614fcdb691761a70c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	8ee044ea4a	ssh/tailssh: make the SSH server a singleton, register with LocalBackend Remove the weird netstack -> tailssh dependency and instead have tailssh register itself with ipnlocal when linked. This makes tailssh.server a singleton, so we can have a global map of all sessions. Updates #3802 Change-Id: Iad5caec3a26a33011796878ab66b8e7b49339f29 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	3d180c0376	go.mod, ssh/tailssh, tempfork/gliderlabs: bump x/crypto/ssh fork for NoClientAuthCallback Prep for evaluating SSHPolicy earlier to decide whether certs are required, which requires knowing the target SSH user. Updates #3802 Change-Id: I2753ec8069e7f19c9121300d0fb0813c1c627c36 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	0861923c21	ssh/tailssh, tailcfg: add more HoldAndDelegate expansions, document Updates #3802 Change-Id: I447f06b49e2a917bffe36881d0634c9195085512 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
Brad Fitzpatrick	f30473211b	ssh/tailssh: start of implementing optional session recording To asciinema cast format. Updates #3802 Change-Id: Ifd3ea31922cd2c99068369cb1650e21f2545b0e1 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
Josh Bleecher Snyder	0868329936	all: use any instead of interface{} My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Maisem Ali	45a7f6689c	tailcfg: add field to allow LocalPortForwarding in SSHAction Updates #3802, #4129 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	98b45ef12c	ssh/tailssh: add support for agent forwarding. Updates #3802 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	462e75666b	ssh/tailssh: start sending the server version Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	bf3559171f	ssh/tailssh: set DBUS_SESSION_BUS_ADDRESS and SSH_TTY variables Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	6d61b7906e	ssh/tailssh: handle terminal opcodes Updates #3802 #4146 Signed-off-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
Brad Fitzpatrick	012098ec32	ssh/tailssh: fix terminal corruption (temporary hack) Maisem figured out the real problem but will take several commits (e.g. tailscale/ssh#2) in different repos to get it fixed properly. This is an interim hack. Details of real fix: https://github.com/tailscale/tailscale/issues/4146#issuecomment-1065952947 Updates #4146 Updates #3802 Change-Id: I7b7dc5713baa3e5de75b87b69e7179a6e7549b0b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago

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171 Commits (82576190a765d7c3cb23468c5709d7a7906050b7)