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tailscale/util/winutil/s4u
Aaron Klotz da078b4c09 util/winutil: add package for logging into Windows via Service-for-User (S4U)
This PR ties together pseudoconsoles, user profiles, s4u logons, and
process creation into what is (hopefully) a simple API for various
Tailscale services to obtain Windows access tokens without requiring
knowledge of any Windows passwords. It works both for domain-joined
machines (Kerberos) and non-domain-joined machines. The former case
is fairly straightforward as it is fully documented. OTOH, the latter
case is not documented, though it is fully defined in the C headers in
the Windows SDK. The documentation blanks were filled in by reading
the source code of Microsoft's Win32 port of OpenSSH.

We need to do a bit of acrobatics to make conpty work correctly while
creating a child process with an s4u token; see the doc comments above
startProcessInternal for details.

Updates #12383

Signed-off-by: Aaron Klotz <aaron@tailscale.com>
3 months ago
..
lsa_windows.go util/winutil: add package for logging into Windows via Service-for-User (S4U) 3 months ago
mksyscall.go util/winutil: add package for logging into Windows via Service-for-User (S4U) 3 months ago
s4u_windows.go util/winutil: add package for logging into Windows via Service-for-User (S4U) 3 months ago
zsyscall_windows.go util/winutil: add package for logging into Windows via Service-for-User (S4U) 3 months ago