tailscale

Commit Graph

Author	SHA1	Message	Date
Aaron Klotz	df86576989	util/winutil: add AllocateContiguousBuffer and SetNTString helper funcs AllocateContiguousBuffer is for allocating structs with trailing buffers containing additional data. It is to be used for various Windows structures containing pointers to data located immediately after the struct. SetNTString performs in-place setting of windows.NTString and windows.NTUnicodeString. Updates #12383 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	6 months ago
Andrea Gottardo	1d3e77f373	util/syspolicy: add ReadStringArray interface (#11857 ) Fixes tailscale/corp#19459 This PR adds the ability for users of the syspolicy handler to read string arrays from the MDM solution configured on the system. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>	8 months ago
Andrew Lytvynov	2716250ee8	all: cleanup unused code, part 2 (#10670 ) And enable U1000 check in staticcheck. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	12 months ago
Aaron Klotz	db39a43f06	util/winutil: add support for restarting Windows processes in specific sessions This PR is all about adding functionality that will enable the installer's upgrade sequence to terminate processes belonging to the previous version, and then subsequently restart instances belonging to the new version within the session(s) corresponding to the processes that were killed. There are multiple parts to this: * We add support for the Restart Manager APIs, which allow us to query the OS for a list of processes locking specific files; * We add the RestartableProcess and RestartableProcesses types that query additional information about the running processes that will allow us to correctly restart them in the future. These types also provide the ability to terminate the processes. * We add the StartProcessInSession family of APIs that permit us to create new processes within specific sessions. This is needed in order to properly attach a new GUI process to the same RDP session and desktop that its previously-terminated counterpart would have been running in. * I tweaked the winutil token APIs again. * A lot of this stuff is pretty hard to test without a very elaborate harness, but I added a unit test for the most complicated part (though it requires LocalSystem to run). Updates https://github.com/tailscale/corp/issues/13998 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Aaron Klotz	855f79fad7	cmd/tailscaled, util/winutil: changes to process and token APIs in winutil This PR changes the internal getTokenInfo function to use generics. I also removed our own implementations for obtaining a token's user and primary group in favour of calling the ones now available in x/sys/windows. Furthermore, I added two new functions for working with tokens, logon session IDs, and Terminal Services / RDP session IDs. I modified our privilege enabling code to allow enabling of multiple privileges via one single function call. Finally, I added the ProcessImageName function and updated the code in tailscaled_windows.go to use that instead of directly calling the underlying API. All of these changes will be utilized by subsequent PRs pertaining to this issue. Updates https://github.com/tailscale/corp/issues/13998 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Andrew Lytvynov	aba4bd0c62	util/winutil: simplify dropping privileges after use (#10099 ) To safely request and drop privileges, runtime.Lock/UnlockOSThread and windows.Impersonate/RevertToSelf should be called. Add these calls to winutil.EnableCurrentThreadPrivilege so that callers don't need to worry about it. Updates https://github.com/tailscale/corp/issues/15488 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	1 year ago
Aaron Klotz	fbc18410ad	ipn/ipnauth: improve the Windows token administrator check (Token).IsAdministrator is supposed to return true even when the user is running with a UAC limited token. The idea is that, for the purposes of this check, we don't care whether the user is currently* running with full Admin rights, we just want to know whether the user can potentially do so. We accomplish this by querying for the token's "linked token," which should be the fully-elevated variant, and checking its group memberships. We also switch ipn/ipnserver/(*Server).connIsLocalAdmin to use the elevation check to preserve those semantics for tailscale serve; I want the IsAdministrator check to be used for less sensitive things like toggling auto-update on and off. Fixes #10036 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Claire Wang	e3d6236606	winutil: refactor methods to get values from registry to also return (#9536 ) errors Updates tailscale/corp#14879 Signed-off-by: Claire Wang <claire@tailscale.com>	1 year ago
Aaron Klotz	ea693eacb6	util/winutil: add RegisterForRestart, allowing programs to indicate their preferences to the Windows restart manager In order for the installer to restart the GUI correctly post-upgrade, we need the GUI to be able to register its restart preferences. This PR adds API support for doing so. I'm adding it to OSS so that it is available should we need to do any such registrations on OSS binaries in the future. Updates https://github.com/tailscale/corp/issues/13998 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Aaron Klotz	37925b3e7a	go.mod, cmd/tailscaled, ipn/localapi, util/osdiag, util/winutil, util/winutil/authenticode: add Windows module list to OS-specific logs that are written upon bugreport * We update wingoes to pick up new version information functionality (See pe/version.go in the https://github.com/dblohm7/wingoes repo); * We move the existing LogSupportInfo code (including necessary syscall stubs) out of util/winutil into a new package, util/osdiag, and implement the public LogSupportInfo function may be implemented for other platforms as needed; * We add a new reason argument to LogSupportInfo and wire that into localapi's bugreport implementation; * We add module information to the Windows implementation of LogSupportInfo when reason indicates a bugreport. We enumerate all loaded modules in our process, and for each one we gather debug, authenticode signature, and version information. Fixes #7802 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Aaron Klotz	2aa8299c37	cmd/tailscaled, util/winutil: log our registry keys during tailscaled startup In order to improve our ability to understand the state of policies and registry settings when troubleshooting, we enumerate all values in all subkeys. x/sys/windows does not already offer this, so we need to call RegEnumValue directly. For now we're just logging this during startup, however in a future PR I plan to also trigger this code during a bugreport. I also want to log more than just registry. Fixes #8141 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Will Norris	71029cea2d	all: update copyright and license headers This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Aaron Klotz	3c452b9880	util/winutil: fix erroneous condition in implementation of getRegIntegerInternal We only want to log when err != registry.ErrNotExist. The condition was backward. Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Aaron Klotz	6e33d2da2b	ipn/ipnauth, util/winutil: add temporary LookupPseudoUser workaround to address os/user.LookupId errors on Windows I added util/winutil/LookupPseudoUser, which essentially consists of the bits that I am in the process of adding to Go's standard library. We check the provided SID for "S-1-5-x" where 17 <= x <= 20 (which are the known pseudo-users) and then manually populate a os/user.User struct with the correct information. Fixes https://github.com/tailscale/tailscale/issues/869 Fixes https://github.com/tailscale/tailscale/issues/2894 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Adrian Dewhurst	c3a5489e72	util/winutil: remove log spam for missing registry keys It's normal for HKLM\SOFTWARE\Policies\Tailscale to not exist but that currently produces a lot of log spam. Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	2 years ago
Maisem Ali	545639ee44	util/winutil: consolidate interface specific registry keys Code movement to allow reuse in a follow up PR. Updates #1659 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Aaron Klotz	b005b79236	net/dns, paths, util/winutil: change net/dns/windowsManager NRPT management to support more than 50 domains. AFAICT this isn't documented on MSDN, but based on the issue referenced below, NRPT rules are not working when a rule specifies > 50 domains. This patch modifies our NRPT rule generator to split the list of domains into chunks as necessary, and write a separate rule for each chunk. For compatibility reasons, we continue to use the hard-coded rule ID, but as additional rules are required, we generate new GUIDs. Those GUIDs are stored under the Tailscale registry path so that we know which rules are ours. I made some changes to winutils to add additional helper functions in support of both the code and its test: I added additional registry accessors, and also moved some token accessors from paths to util/winutil. Fixes https://github.com/tailscale/coral/issues/63 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago
Aaron Klotz	82cd98609f	util/winutil: migrate corp's winutil into OSS. It makes the most sense to have all our utility functions reside in one place. There was nothing in corp that could not reasonably live in OSS. I also updated `StartProcessAsChild` to no longer depend on `futureexec`, thus reducing the amount of code that needed migration. I tested this change with `tswin` and it is working correctly. I have a follow-up PR to remove the corresponding code from corp. The migrated code was mostly written by @alexbrainman. Sourced from corp revision 03e90cfcc4dd7b8bc9b25eb13a26ec3a24ae0ef9 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago
Aaron Klotz	3a74f2d2d7	cmd/tailscaled, util/winutil: add accessor functions for Windows system policies. 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>	3 years ago
Aaron Klotz	d7962e3bcf	ipn/ipnserver, util/winutil: update workaround for os/user.LookupId failures on Windows to reject SIDs from deleted/invalid security principals. Our current workaround made the user check too lax, thus allowing deleted users. This patch adds a helper function to winutil that checks that the uid's SID represents a valid Windows security principal. Now if `lookupUserFromID` determines that the SID is invalid, we simply propagate the error. Updates https://github.com/tailscale/tailscale/issues/869 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago

20 Commits (200d92121f797176286139473fd6eba06bcdc7fc)