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This patch adds new functions to be used when accessing system policies, and revises callers to use the new functions. They first attempt the new registry path for policies, and if that fails, attempt to fall back to the legacy path. We keep non-policy variants of these functions because we should be able to retain the ability to read settings from locations that are not exposed to sysadmins for group policy edits. The remaining changes will be done in corp. Updates https://github.com/tailscale/tailscale/issues/3584 Signed-off-by: Aaron Klotz <aaron@tailscale.com>
65 lines
2.7 KiB
Go
65 lines
2.7 KiB
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package winutil contains misc Windows/Win32 helper functions.
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package winutil
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// RegBase is the registry path inside HKEY_LOCAL_MACHINE where registry settings
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// are stored. This constant is a non-empty string only when GOOS=windows.
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const RegBase = regBase
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// GetPolicyString looks up a registry value in the local machine's path for
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// system policies, or returns the given default if it can't.
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// Use this function to read values that may be set by sysadmins via the MSI
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// installer or via GPO. For registry settings that you do *not* want to be
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// visible to sysadmin tools, use GetRegString instead.
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//
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// This function will only work on GOOS=windows. Trying to run it on any other
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// OS will always return the default value.
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func GetPolicyString(name, defval string) string {
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return getPolicyString(name, defval)
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}
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// GetPolicyInteger looks up a registry value in the local machine's path for
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// system policies, or returns the given default if it can't.
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// Use this function to read values that may be set by sysadmins via the MSI
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// installer or via GPO. For registry settings that you do *not* want to be
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// visible to sysadmin tools, use GetRegInteger instead.
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//
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// This function will only work on GOOS=windows. Trying to run it on any other
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// OS will always return the default value.
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func GetPolicyInteger(name string, defval uint64) uint64 {
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return getPolicyInteger(name, defval)
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}
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// GetRegString looks up a registry path in the local machine path, or returns
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// the given default if it can't.
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//
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// This function will only work on GOOS=windows. Trying to run it on any other
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// OS will always return the default value.
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func GetRegString(name, defval string) string {
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return getRegString(name, defval)
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}
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// GetRegInteger looks up a registry path in the local machine path, or returns
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// the given default if it can't.
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//
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// This function will only work on GOOS=windows. Trying to run it on any other
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// OS will always return the default value.
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func GetRegInteger(name string, defval uint64) uint64 {
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return getRegInteger(name, defval)
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}
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// IsSIDValidPrincipal determines whether the SID contained in uid represents a
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// type that is a valid security principal under Windows. This check helps us
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// work around a bug in the standard library's Windows implementation of
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// LookupId in os/user.
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// See https://github.com/tailscale/tailscale/issues/869
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//
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// This function will only work on GOOS=windows. Trying to run it on any other
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// OS will always return false.
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func IsSIDValidPrincipal(uid string) bool {
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return isSIDValidPrincipal(uid)
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}
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