Summary:
Ref T4151. Addresses these issues:
- Mentions `diffusion.ssh-user`.
- Mentions `/etc/shadow` and `!!`.
- Mentions `/etc/passwd` and shell.
- Mentions `sshd -d -d -d`.
- Mentions `Defaults requiretty`.
- Adds `AllowUsers` to default configuration.
- Mentions `sudo -E ...` as a troubleshooting step.
- Mentions multiple VCS binaries.
- Fixes `sshd` paths to be absolute.
- Fixes example path in `sshd_config` template.
- Mentions `GIT_CURL_VERBOSE`.
- Walks users through cloning.
- Adds documentation for custom hooks.
- Mentions that only `daemon-user` interacts with repositories.
- Added general troubleshooting guide.
I didn't fix these:
- Weird one-time issue with `sudoers.d/`. We tell you to edit `/etc/sudoers` directly anyway.
- Insane `#includedir` magic, as above.
- Confusion around `vcs-user` for HTTP, since I think this is fairly clear.
- Confusion around parent directory permissions -- not sure about this one, `sshd` normally runs as root?
I added an `ssh-shell` as a safer alternative to `/bin/sh`. I need to test this a bit more.
Test Plan:
- Read documentation.
- Will test `ssh-shell`.
Reviewers: btrahan, chad
Reviewed By: chad
Subscribers: bluehawk, mbishopim3, epriestley
Maniphest Tasks: T4151
Differential Revision: https://secure.phabricator.com/D8586
Summary: Fixes T2230. This isn't a total walk in the park to configure, but should work for early adopters now.
Test Plan: Read documentation, browsed UI.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2230
Differential Revision: https://secure.phabricator.com/D7634
Summary:
Fixes T2229. This sets the stage for a patch similar to D7417, but for SSH. In particular, SSH 6.2 introduced an `AuthorizedKeysCommand` directive, which lets us do this in a mostly-reasonable way without needing users to patch sshd (if they have a recent enough version, at least).
The way the `AuthorizedKeysCommand` works is that it gets run and produces an `authorized_keys`-style file fragment. This isn't ideal, because we have to dump every key into the result, but should be fine for most installs. The earlier patch against `sshd` passes the public key itself, which allows the script to just look up the key. We might use this eventually, since it can scale much better, so I haven't removed it.
Generally, auth is split into two scripts now which mostly do the same thing:
- `ssh-auth` is the AuthorizedKeysCommand auth, which takes nothing and dumps the whole keyfile.
- `ssh-auth-key` is the slightly cleaner and more scalable (but patch-dependent) version, which takes the public key and dumps only matching options.
I also reworked the argument parsing to be a bit more sane.
Test Plan:
This is somewhat-intentionally a bit obtuse since I don't really want anyone using it yet, but basically:
- Copy `phabricator-ssh-hook.sh` to somewhere like `/usr/libexec/openssh/`, chown it `root` and chmod it `500`.
- This script should probably also do a username check in the future.
- Create a copy of `sshd_config` and fix the paths/etc. Point the KeyScript at your copy of the hook.
- Start a copy of sshd (6.2 or newer) with `-f <your config file>` and maybe `-d -d -d` to foreground and debug.
- Run `ssh -p 2222 localhost` or similar.
Specifically, I did this setup and then ran a bunch of commands like:
- `ssh host` (denied, no command)
- `ssh host ls` (denied, not supported)
- `echo '{}' | ssh host conduit conduit.ping` (works)
Reviewers: btrahan
Reviewed By: btrahan
CC: hach-que, aran
Maniphest Tasks: T2229, T2230
Differential Revision: https://secure.phabricator.com/D7419
