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23 Commits

Author SHA1 Message Date
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>
 2022-07-21 12:42:31 -07:00
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>
 2022-07-15 09:06:01 -07:00
Adam Eijdenberg
9294a14a37 ssh/tailssh: limit setgroups to 16 on macOS 
Fixes #4938

Signed-off-by: Adam Eijdenberg <adam@continusec.com>
 2022-06-25 22:17:53 -07:00
Adam Eijdenberg
7f807fef6c ssh/tailssh: fix /usr/bin/login args on macOS 
Fixes #4931

Signed-off-by: Adam Eijdenberg <adam@continusec.com>
 2022-06-25 22:17:53 -07:00
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>
 2022-05-28 21:03:40 +05:00
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>
 2022-05-09 19:17:52 -07:00
Maisem Ali
a253057fc3 ssh/tailssh: refactor incubator flags 
Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2022-05-09 19:17:52 -07:00
David Anderson
a364bf2b62 ssh/tailssh: various typo fixes, clarifications. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2022-04-21 15:04:13 -07:00
Maisem Ali
337c77964b ssh/tailssh: set groups and gid in the incubated process 
Updates #3802

Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2022-04-21 14:48:34 -07:00
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>
 2022-04-21 14:44:46 -07:00
Maisem Ali
695f8a1d7e ssh/tailssh: add support for sftp 
Updates #3802

Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2022-04-21 10:52:22 -07:00
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>
 2022-04-20 18:34:11 -07:00
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>
 2022-04-15 13:36:57 -07:00
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>
 2022-03-26 21:07:01 -07:00
Maisem Ali
98b45ef12c ssh/tailssh: add support for agent forwarding. 
Updates #3802

Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2022-03-14 13:38:53 -07:00
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>
 2022-03-14 12:01:49 -07:00
Maisem Ali
bf3559171f ssh/tailssh: set DBUS_SESSION_BUS_ADDRESS and SSH_TTY variables 
Updates #3802

Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2022-03-12 19:40:51 -08:00
Maisem Ali
6d61b7906e ssh/tailssh: handle terminal opcodes 
Updates #3802 #4146

Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2022-03-12 17:57:07 -08:00
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>
 2022-03-12 17:57:07 -08:00
Brad Fitzpatrick
ba1adf6c24 ssh/tailssh: make pty termios options match OpenSSH 
Still not sure the exact rules of how/when/who's supposed to set
these, but this works for now on making them match. Baby steps.
Will research more and adjust later.

Updates #4146 (but not enough to fix it, something's still wrong)
Updates #3802

Change-Id: I496d8cd7e31d45fe9ede88fc8894f35dc096de67
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2022-03-11 12:16:10 -08:00
Brad Fitzpatrick
1dd5cf62a5 ssh/tailssh: start login shell, fix arg passing, width/height mismatch 
Updates #3802

Change-Id: I137d7a79195ee86d5dd7c8999f2797fc3cb57cec
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2022-03-10 20:11:41 -08:00
Maisem Ali
598c7a22e7 ssh/tailssh: use lu.Username not lu.Name. 
Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2022-03-08 22:39:03 -08:00
Maisem Ali
06c147d848 ssh/tailssh: create login sessions for new connections 
Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2022-03-08 21:47:19 -08:00