fix: Avoid tsh panic on Windows Server 2019

[codingllama]

Some Windows installs appear to contain a WebAuthn.dll without WebAuthNGetApiVersionNumber, which leads to a panic. This PR aims to fix that.

Error on Windows Server 2019

panic: Failed to find WebAuthNGetApiVersionNumber procedure in WebAuthn.dll: The specified procedure could not be found.

goroutine 1 [running]:
golang.org/x/sys/windows.(*LazyProc).mustFind(...)
	C:/Users/runneradmin/go/pkg/mod/golang.org/x/sys@v0.16.0/windows/dll_windows.go:325
golang.org/x/sys/windows.(*LazyProc).Addr(...)
	C:/Users/runneradmin/go/pkg/mod/golang.org/x/sys@v0.16.0/windows/dll_windows.go:333
github.com/gravitational/teleport/lib/auth/webauthnwin.webAuthNGetApiVersionNumber()
	C:/a/teleport.e/teleport.e/lib/auth/webauthnwin/zsyscall_windows.go:83 +0xb4
github.com/gravitational/teleport/lib/auth/webauthnwin.newNativeImpl()
	C:/a/teleport.e/teleport.e/lib/auth/webauthnwin/webauthn_windows.go:65 +0xad
github.com/gravitational/teleport/lib/auth/webauthnwin.init()
	C:/a/teleport.e/teleport.e/lib/auth/webauthnwin/webauthn_windows.go:36 +0x169

WebAuthNGetApiVersionNumber is a v1 procedure on WebAuthn.dll, so in its absence we disable WebAuthn support as well (as all bets are off in which other functions may or may not exist).

Changelog: Avoid tsh/WebAuthn.dll panic on Windows Server 2019

[codingllama]

FYI @stevenGravy.

[stevenGravy]

FYI @stevenGravy.

thanks! @tenaciousdlg

[codingllama]

Steven kindly tried out a test build, seems to be working fine.

[public-teleport-github-review-bot]

@codingllama See the table below for backport results.

Branch	Result
branch/v13	Create PR
branch/v14	Create PR
branch/v15	Create PR

[sergefedorow]

I have the same issue with tsh v.14.3.3 and 15.0.2.
Client is Windows 10 Enterprise Evaluation, version 1809
Installation did from zip file.

C:\Users\IEUser>tsh version
panic: Failed to find WebAuthNGetApiVersionNumber procedure in WebAuthn.dll: The specified procedure could not be found.

goroutine 1 [running]:
golang.org/x/sys/windows.(*LazyProc).mustFind(...)
        C:/Users/runneradmin/go/pkg/mod/golang.org/x/sys@v0.16.0/windows/dll_windows.go:325
golang.org/x/sys/windows.(*LazyProc).Addr(...)
        C:/Users/runneradmin/go/pkg/mod/golang.org/x/sys@v0.16.0/windows/dll_windows.go:333
github.com/gravitational/teleport/lib/auth/webauthnwin.webAuthNGetApiVersionNumber()
        C:/a/teleport.e/teleport.e/lib/auth/webauthnwin/zsyscall_windows.go:83 +0xb4
github.com/gravitational/teleport/lib/auth/webauthnwin.newNativeImpl()
        C:/a/teleport.e/teleport.e/lib/auth/webauthnwin/webauthn_windows.go:65 +0xad
github.com/gravitational/teleport/lib/auth/webauthnwin.init()
        C:/a/teleport.e/teleport.e/lib/auth/webauthnwin/webauthn_windows.go:36 +0x169

[ravicious]

@sergefedorow Could you try tsh v14.3.4 which shipped with this fixed? 15.0.3 is not out yet but it'll include the fix as well.

[sergefedorow]

@ravicious Unfortunately 14.3.4 does not work for me either.

[ravicious]

Sorry, my bad, I looked at the release notes for 14.3.4 and I saw #36868 which was a fix for a similar problem.

14.3.7+ is going to include the fix, I imagine it'll be released later this or next week.