551d6ae0f3
We have a lot of access checks spread around the ipnserver, ipnlocal, localapi, and ipnauth packages, with a significant number of platform-specific checks that are used exclusively on either Windows or Unix-like platforms. Additionally, with the exception of a few Windows-specific checks, most of these checks are per-device rather than per-profile, which is not always correct even on single-user/single-session environments, but even more problematic on multi-user/multi-session environments such as Windows. We initially attempted to map all possible operations onto the permitRead/permitWrite access flags. However, these flags are not utilized on Windows and prove insufficient on Unix machines. Specifically, on Windows, the first user to connect is granted full access, while subsequent logged-in users have no access to the LocalAPI at all. This restriction applies regardless of the environment, local user roles (e.g., whether a Windows user is a local admin), or whether they are the active user on a shared Windows client device. Conversely, on Unix, we introduced the permitCert flag to enable granting non-root web servers (such as www-data, caddy, nginx, etc.) access to certificates. We also added additional access check to distinguish local admins (root on Unix-like platforms, elevated admins on Windows) from users with permitWrite access, and used it as a fix for the serve path LPE. A more fine-grained access control system could better suit our current and future needs, especially in improving the UX across various scenarios on corporate and personal Windows devices. This adds an API surface in ipnauth that will be used in LocalBackend to check access to individual Tailscale profiles as well as any device-wide information and operations. Updates tailscale/corp#18342 Signed-off-by: Nick Khyl <nickk@tailscale.com> |
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README.md
Tailscale
Private WireGuard® networks made easy
Overview
This repository contains the majority of Tailscale's open source code.
Notably, it includes the tailscaled daemon and
the tailscale CLI tool. The tailscaled daemon runs on Linux, Windows,
macOS, and to varying degrees
on FreeBSD and OpenBSD. The Tailscale iOS and Android apps use this repo's
code, but this repo doesn't contain the mobile GUI code.
Other Tailscale repos of note:
- the Android app is at https://github.com/tailscale/tailscale-android
- the Synology package is at https://github.com/tailscale/tailscale-synology
- the QNAP package is at https://github.com/tailscale/tailscale-qpkg
- the Chocolatey packaging is at https://github.com/tailscale/tailscale-chocolatey
For background on which parts of Tailscale are open source and why, see https://tailscale.com/opensource/.
Using
We serve packages for a variety of distros and platforms at https://pkgs.tailscale.com.
Other clients
The macOS, iOS, and Windows clients use the code in this repository but additionally include small GUI wrappers. The GUI wrappers on non-open source platforms are themselves not open source.
Building
We always require the latest Go release, currently Go 1.22. (While we build releases with our Go fork, its use is not required.)
go install tailscale.com/cmd/tailscale{,d}
If you're packaging Tailscale for distribution, use build_dist.sh
instead, to burn commit IDs and version info into the binaries:
./build_dist.sh tailscale.com/cmd/tailscale
./build_dist.sh tailscale.com/cmd/tailscaled
If your distro has conventions that preclude the use of
build_dist.sh, please do the equivalent of what it does in your
distro's way, so that bug reports contain useful version information.
Bugs
Please file any issues about this code or the hosted service on the issue tracker.
Contributing
PRs welcome! But please file bugs. Commit messages should reference bugs.
We require Developer Certificate of
Origin
Signed-off-by lines in commits.
See git log for our commit message style. It's basically the same as
Go's style.
About Us
Tailscale is primarily developed by the people at https://github.com/orgs/tailscale/people. For other contributors, see:
- https://github.com/tailscale/tailscale/graphs/contributors
- https://github.com/tailscale/tailscale-android/graphs/contributors
Legal
WireGuard is a registered trademark of Jason A. Donenfeld.