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/* advapi32.cc: Win32 replacement functions.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <winioctl.h>
#include "shared_info.h"
#include "ntdll.h"
#define DEFAULT_NTSTATUS_TO_BOOL_RETURN \
if (!NT_SUCCESS (status)) \
SetLastError (RtlNtStatusToDosError (status)); \
return NT_SUCCESS (status);
/* This file should only contain non-trivial implementations of advapi32
functions, or advapi32 functions for which the ntdll.dll equivalent
is not easy to understand. In all other case, use the ntdll.dll
equivalent. */
BOOL WINAPI
RevertToSelf ()
{
HANDLE tok = NULL;
NTSTATUS status = NtSetInformationThread (NtCurrentThread (),
ThreadImpersonationToken,
&tok, sizeof tok);
DEFAULT_NTSTATUS_TO_BOOL_RETURN
}
BOOL WINAPI
DuplicateTokenEx (HANDLE tok, DWORD access, LPSECURITY_ATTRIBUTES sec_attr,
SECURITY_IMPERSONATION_LEVEL level, TOKEN_TYPE type,
PHANDLE new_tok)
{
SECURITY_QUALITY_OF_SERVICE sqos =
{ sizeof sqos, level, SECURITY_STATIC_TRACKING, FALSE };
OBJECT_ATTRIBUTES attr =
{ sizeof attr, NULL, NULL,
(sec_attr && sec_attr->bInheritHandle) ? OBJ_INHERIT : 0U,
sec_attr ? sec_attr->lpSecurityDescriptor : NULL, &sqos };
NTSTATUS status = NtDuplicateToken (tok, access, &attr, FALSE, type, new_tok);
DEFAULT_NTSTATUS_TO_BOOL_RETURN
}
BOOL WINAPI
ImpersonateLoggedOnUser (HANDLE tok)
{
NTSTATUS status;
HANDLE ptok = NULL;
TOKEN_TYPE type;
ULONG size;
status = NtQueryInformationToken (tok, TokenType, &type, sizeof type, &size);
if (!NT_SUCCESS (status))
{
SetLastError (RtlNtStatusToDosError (status));
return FALSE;
}
if (type == TokenPrimary)
{
/* If its a primary token it must be converted to an impersonated
token. */
SECURITY_QUALITY_OF_SERVICE sqos =
{ sizeof sqos, SecurityImpersonation, SECURITY_DYNAMIC_TRACKING, FALSE};
OBJECT_ATTRIBUTES attr =
{ sizeof attr, NULL, NULL, 0, NULL, &sqos };
/* The required rights for the impersonation token according to MSDN. */
status = NtDuplicateToken (tok, TOKEN_QUERY | TOKEN_IMPERSONATE,
&attr, FALSE, TokenImpersonation, &ptok);
if (!NT_SUCCESS (status))
{
SetLastError (RtlNtStatusToDosError (status));
return FALSE;
}
tok = ptok;
}
status = NtSetInformationThread (NtCurrentThread (), ThreadImpersonationToken,
&tok, sizeof tok);
if (ptok)
NtClose (ptok);
DEFAULT_NTSTATUS_TO_BOOL_RETURN
}
BOOL WINAPI
ImpersonateNamedPipeClient (HANDLE pipe)
{
IO_STATUS_BLOCK io;
NTSTATUS status = NtFsControlFile (pipe, NULL, NULL, NULL, &io,
FSCTL_PIPE_IMPERSONATE, NULL, 0, NULL, 0);
DEFAULT_NTSTATUS_TO_BOOL_RETURN
}
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