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Nick Khyl 551d6ae0f3 ipn, ipn/ipnauth: implement API surface for LocalBackend access checking 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>		2 weeks ago
.bencher	bencher: add config to suppress failures on benchmark regressions.	3 years ago
.github	Revert "licenses: add gliderlabs/ssh license"	3 weeks ago
appc	appc: optimize dns response observation for large route tables	3 months ago
atomicfile	various: add golangci-lint, fix issues (#7905 )	1 year ago
chirp	all: update copyright and license headers	1 year ago
client	build(deps-dev): bump vite from 5.1.4 to 5.1.7 in /client/web	2 weeks ago
clientupdate	ipn/ipnlocal,clientupdate: disallow auto-updates in containers (#11814 )	2 weeks ago
cmd	ipn, ipn/ipnauth: implement API surface for LocalBackend access checking	2 weeks ago
control	all: use Go 1.22 range-over-int	2 weeks ago
derp	all: use Go 1.22 range-over-int	2 weeks ago
disco	disco: correct noun for nacl box type in disco docs	5 months ago
docs	docs/windows/policy: add missing key expiration warning interval	2 weeks ago
doctor	doctor/ethtool, ipn/ipnlocal: add ethtool bugreport check	3 months ago
drive	drive: rewrite Location headers	2 weeks ago
envknob	envknob: ensure f is not nil before using it	2 months ago
health	all: use Go 1.22 range-over-int	2 weeks ago
hostinfo	hostinfo: use Distro field for distinguishing Windows Server builds	2 weeks ago
internal/tooldeps	various: add golangci-lint, fix issues (#7905 )	1 year ago
ipn	ipn, ipn/ipnauth: implement API surface for LocalBackend access checking	2 weeks ago
jsondb	all: update copyright and license headers	1 year ago
k8s-operator	cmd/k8s-operator,k8s-operator: document tailscale.com Custom Resource Definitions better. (#11665 )	2 weeks ago
kube	cmd/k8s-operator,ipn/store/kubestore: patch secrets instead of updating	8 months ago
licenses	licenses: update license notices	3 weeks ago
log	all: use zstdframe where sensible (#11491 )	1 month ago
logpolicy	all: use zstdframe where sensible (#11491 )	1 month ago
logtail	all: use Go 1.22 range-over-int	2 weeks ago
metrics	all: use Go 1.22 range-over-int	2 weeks ago
net	interfaces: create android impl (#11784 )	2 weeks ago
packages/deb	go.mod: upgrade nfpm to v2 (#8786 )	9 months ago
paths	all: use Go 1.22 range-over-int	2 weeks ago
portlist	all: use Go 1.22 range-over-int	2 weeks ago
posture	cmd/tailscaled, net/tstun: build for aix/ppc64	3 weeks ago
prober	all: use Go 1.22 range-over-int	2 weeks ago
proxymap	wgengine, proxymap: split out port mapping from Engine to new type	8 months ago
release	version/mkversion: enforce synology versions within int32 range	2 months ago
safesocket	all: use Go 1.22 range-over-int	2 weeks ago
safeweb	safeweb: allow object-src: self in CSP (#11782 )	2 weeks ago
scripts	scripts/installer.sh: add rpm GPG key import (#11686 )	3 weeks ago
smallzstd	all: use Go 1.22 range-over-int	2 weeks ago
ssh/tailssh	all: use Go 1.22 range-over-int	2 weeks ago
syncs	all: use Go 1.22 range-over-int	2 weeks ago
tailcfg	tailcfg: rename exit node destination network flow log node attribute (#11779 )	2 weeks ago
taildrop	all: use new AppendEncode methods available in Go 1.22 (#11079 )	3 months ago
tempfork	cmd/tailscale: add shell tab-completion	2 weeks ago
tka	all: use Go 1.22 range-over-int	2 weeks ago
tool	tool/gocross: add android autoflags (#11465 )	1 month ago
tsconst	all: update copyright and license headers	1 year ago
tsd	tailscale: update tailfs functions and vars to use drive naming (#11597 )	4 weeks ago
tsnet	all: use Go 1.22 range-over-int	2 weeks ago
tstest	wgengine/magicsock: disable portmapper in tunchan-faked tests	2 weeks ago
tstime	all: use Go 1.22 range-over-int	2 weeks ago
tsweb	all: use Go 1.22 range-over-int	2 weeks ago
types	all: use Go 1.22 range-over-int	2 weeks ago
util	all: use Go 1.22 range-over-int	2 weeks ago
version	all: use Go 1.22 range-over-int	2 weeks ago
wf	go.mod, all: move away from inet.af domain seized by Taliban	3 months ago
wgengine	wgengine\router: fix the Tailscale-In firewall rule to work on domain networks	2 weeks ago
words	words: add a list of things you should yahoo!	3 months ago
.gitattributes	.: add .gitattributes entry to use Go hunk-header driver	2 years ago
.gitignore	client/web: always use new web client; remove old client	8 months ago
.golangci.yml	ci: run 'go vet' in golangci-lint; fix errors in tests	5 months ago
ALPINE.txt	ALPINE.txt,Dockerfile{.base},build_docker.sh: bump alpine (#10543 )	5 months ago
AUTHORS	Move Linux client & common packages into a public repo.	4 years ago
CODEOWNERS	CODEOWNERS: add the start of an owners file	9 months ago
CODE_OF_CONDUCT.md	Add a code of conduct.	4 years ago
Dockerfile	Dockerfile: use Go 1.22	3 months ago
Dockerfile.base	ALPINE.txt,Dockerfile{.base},build_docker.sh: bump alpine (#10543 )	5 months ago
LICENSE	all: update tools that manage copyright headers	1 year ago
Makefile	Makefile: fix default SYNO_ARCH in Makefile	3 weeks ago
PATENTS	Move Linux client & common packages into a public repo.	4 years ago
README.md	go.mod, README.md: use Go 1.22	3 months ago
SECURITY.md	Add a SECURITY.md for vulnerability reports.	4 years ago
VERSION.txt	VERSION.txt: this is v1.65.0	3 weeks ago
api.md	api.md: add missing backtick to GET searchpaths doc (#11459 )	1 month ago
build_dist.sh	cmd/tailscale: add shell tab-completion	2 weeks ago
build_docker.sh	ipn/store: omit AWS & Kubernetes support on 'small' Linux GOARCHes	2 weeks ago
flake.lock	flake.nix: build tailscale with go 1.22	3 months ago
flake.nix	go.mod.sri: update SRI hash for go.mod changes	3 weeks ago
go.mod	go.mod: bump golang.org/x/net (#11775 )	2 weeks ago
go.mod.sri	go.mod.sri: update SRI hash for go.mod changes	3 weeks ago
go.sum	go.mod: bump golang.org/x/net (#11775 )	2 weeks ago
go.toolchain.branch	go.toolchain.rev: bump to Go 1.22.0 (#11055 )	3 months ago
go.toolchain.rev	go.toolchain.rev: bump to Go 1.22.2	4 weeks ago
gomod_test.go	go.mod: add test that replace directives aren't added in oss	7 months ago
header.txt	cmd/k8s-operator: operator can create subnetrouter (#9505 )	5 months ago
pull-toolchain.sh	pull-toolchain.sh: don't run update-flake.sh	1 year ago
shell.nix	go.mod.sri: update SRI hash for go.mod changes	3 weeks ago
staticcheck.conf	all: cleanup unused code, part 2 (#10670 )	4 months ago
update-flake.sh	Code Improvements (#11311 )	2 months ago
version-embed.go	version: return correct Meta.MajorMinorPatch in non-dev builds	1 year ago
version_test.go	go.mod,wgengine/netstack: bump gvisor	3 months ago

README.md

Tailscale

https://tailscale.com

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:

Legal

WireGuard is a registered trademark of Jason A. Donenfeld.