- Updated code to dynamic load Lsa functions until RS5 SDK includes them
- Add conpty support in openssh
- Fixed Wierd characters (?25l) are seen, when logged in from ssh client
- Backspace doesn't work in powershell window
- Changes to support ssh-shellhost as an alternative shell
- Added support to have ssh-shellhost work as a standby shell (ssh-shellhost -c "cmdline") simply executes cmdline via CreateProcess
- Added E2E test cases and fixed unittests broken from prior changes
- Added PTY launch interface that supports both conpty and ssh-shellhost pty.
- Implemented PTY control channel in ssh-shellhost that supports Window resize events.
- Fixed regression with starting a PTY session with an explicit command
- modified ssh-shellhost pty argument to ---pty to remove ambiguity in cases when both -p and -c are present in commandline. Ex. ssh-shellhost.exe -c "myprogram -p -c argument"
- Logic to support conpty (currently disabled until validation is complete)
- fdopen() and fchmod() support for file handles
- support for auto updating known_hosts via ssh and ssh-keygen
- Support for dynamic Windows-size changes with PTY
- Changes to support OneCore SDK
- Test cases
Current group membership resolution though very effective, is very slow. In a typical domain joined enterprise machine, adding a simple entry like the following in sshd_config
AllowGroups administrators
will incur a long delay in remote session establishment as sshd tried to pull all groups associated with the domain user.
Changes in this PR optimize the general case scenarios where no wild cards are in use. Specifically rules like this are processed promptly:
AllowGroups group1, group2, group3 //with no wild cards
Match Group group1 //single group with no negation and wild cards
Optimization is done by resolve the groupname in rule immediately to SID and checking its membership against user token. Enumerating the entire group membership is done on a lazy on-demand basis.
Beyond the optimization, there are 2 functional changes
- removed domain prefix for builtin groups
- removed domain prefix'ed versions of local groups since we are strictly following the convention that local principals shouldn't have any domain qualification.
Updated SSHD user password generation routine to be longer and more complex. This should satisfy systems with password filters that require more character types or very long passwords.
Updated routine to now securely zero memory for the SSHD account password.
Corrected attempt to write to NULL pointer by localtime_s() in localtime_r() and made function return NULL on error per specification.
Addressed various compiler / code analysis warnings.
Added utility to build session process command line - this accounts for restrictions from various shells. With these changes, scp and sftp-server are expected to be machine wide PATH if a custom shell (other than cmd.exe) is defined. Added comprehensive test cases.
Fixed issue with USERNAME env variable containing domain prefix too.
PowerShell/Win32-OpenSSH#1165PowerShell/Win32-OpenSSH#1165PowerShell/Win32-OpenSSH#1171
- Removed logic that was excluding the group membership SID that matched 'None' on workgroup computers or 'Domain Users' on domain systems.
- Removed test that was checking that AllowGroups failure if user was not in any group at all. This is no longer testable since user will always be a member of at least one group.
https://github.com/PowerShell/Win32-OpenSSH/issues/1167
* Updates To Address OneCore Linking
- Modified generate_s4u_user_token() and sys_auth_passwd() to dynamically load TranslateNameW() to avoid OneCore static library linking.
- Modified getusergroups() to avoid Lsa* calls that are not present in OneCore libraries.
* Updates To Address OneCore Linking - Revisions
- Corrected failure detection logic when TranslateNameW() cannot be located.
* Alternate Thread Creation API To Avoid Memory Leaks
- Switched from CreateThread() to _beginthreadex() and ExitThread() to _endthreadex() in order to avoid potential leaks when linking with static CRT library.
- Addressed a variety of warnings that were being detected with static code analysis.
* Addressed Type Cast Warning
- Added explicit cast to the output of _beginthreadex() to avoid a compiler warning.
* Indentation Fix
Added support to run sshd as non-system. In this mode, sshd can authenticate only the user that sshd is running as, and only via public key authentication.
PowerShell/Win32-OpenSSH#1153
Changes include:
- Removing sid from pwd structure to comply with Unix structure
- Integrating default shell logic within pwd
- pwd placeholder to allow logins using usernames not associated with Windows account (possible via custom LSA authentication)
- Moving all nonPTY logic from shellhost to session.c.
- ssh-shellhost is now exclusively for implementing PTY
- Spawning all session processes from within a shell
- Validation checks in safely_chroot
- Added chroot implementation that simply stores the path in internal state and sets an environment variable
- Spawned processes pickup chroot from environment variable
- Core change in realpath and resolved_path_utf16 now take into account chroot path.
- Unit tests
- Other miscellaneous changes to account for chroot enabled logic in core code
PowerShell/Win32-OpenSSH#190PowerShell/Win32-OpenSSH#292
Modified getusergroups() to use s4u tokens to discover nested groups and return them in NetBiosName\GroupName format.
Modified get_passwd() to internally normalize names to NetBiosName\SamAccountName format and changed functions that use it to translate to UPN where necessary.
Removed unnecessary support functions used by previous version of getusergroups().
Various refactoring and function consolidation / simplification.
Addressed several buffer over-read issues.
PowerShell/Win32-OpenSSH#553
- Reworked resolved_path() into resolved_path_utf16() that combined utf16 conversion and path conditioning into a single function. This eliminated the previously non-threadsafe resolved_path() function.
- Adjusted functions to use resolved_path_utf16().
- Collapsed copy_file() function that was only used once.
- Corrected compilation errors when debug4() and debug5() are enabled.
Fixes following issues:
- gettimeofday : Incorrect converting 100ns intervals (from GetSystemTimeAsFileTime) to timeval.
(us % RATE_DIFF) means number of microseconds but it may be great than 10**6
- nanosleep : SetWaitableTimer works with 100ns intervals but get nanoseconnds (only part of timespec) Missed CloseHandle call in WaitForSingleObject error case.
https://github.com/PowerShell/Win32-OpenSSH/issues/1094
- Added implementation of symlink() using native CreateSymbolicLink() function.
- Added unit tests for symlink behavior in readlink(), lstat, stat(), and symlink().
- Reworked readlink() to be more inline with POSIX readlink() behavior.
- Reworked symlink handling in stat/lstat due to revised readlink().
- Added additional error handling to readlink().
- Added symlink() Implementation - Memory Leak Fix
- Modified fileio_readlink() to properly free a temporary buffer it creates.
Regression: Service is unable to start if "ssh" programdata directory is missing.
Reason: This is due to refactored changes around w32_programdir() that moved its initialization to within win32_posix_initialize. sshd_main() is relying on this call even before the POSIX layer gets initialized.
Fix: Reverted the refactoring changes and added comments to consolidate these changes later. Also removed directory creation logic in install-sshd.ps1 that masked this issue before.
PowerShell/Win32-OpenSSH#929
Issue: ReadThread prematurely returns on read io error. This results in APC never getting set and hence the corresponding fd is never set on select resulting the hang seen in issue 929.
Also removed the static instances storing sync io status, since there could be multiple sync fds operating at the same time. Moved the sync io status to w32_io object itself.
PowerShell/Win32-OpenSSH#884
Convert the mode properly to file permissions.
If mode has "read" permission then we set the file permission to "read & execute"
If mode has "write" permission then we set the file permission to "Write & Modify"
Inherit the file permissions from the parent folder when sftp / scp creates the file on windows.
sftp - put & get.
scp - from local to remote windows machine.
Support the unicode characters as input to the ssh client.
PowerShell/Win32-OpenSSH#711
Remove the bAnsi related code changes to the ssh-shellhost.c as that code never executes..
Fixed "long pressing key issue for the slow ssh connections"
PowerShell/Win32-OpenSSH#701
fixed warning message in the latestw_all recent commits.
Fixed the issue with ssh failures in the latestw_all recent commits.
docker ssh issue
PowerShell/Win32-OpenSSH#666
a) fdopen changes to accept the /dev/null device
b) fix the select (using same fdset as readfdset, exceptfdset) issue with the unix opensssh code.
changed keyscan pester test to refer to localhost (127.0.0.1) instead of GitHub.com
PowerShell/Win32-OpenSSH#731
Fix the ASSERT_HANDLE issue..
ASSERT_HANDLE should fail if handle is either NULL or INVALID_HANDLE.
Added new testcases for the null device.
