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* advapi32.cc (AccessCheck): Remove. 

(PrivilegeCheck): Remove.
	(OpenThreadToken): Remove.
	* fhandler_tty.cc: Replace above functions throughout with their
	ntdll.dll equivalent.
	* security.cc: Ditto.
This commit is contained in:
Corinna Vinschen 2011-04-29 09:48:25 +00:00
parent bd139e52b4
commit 3e8e0c33c0
4 changed files with 41 additions and 48 deletions
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9
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,12 @@
2011-04-29 Corinna Vinschen <corinna@vinschen.de>
* advapi32.cc (AccessCheck): Remove.
(PrivilegeCheck): Remove.
(OpenThreadToken): Remove.
* fhandler_tty.cc: Replace above functions throughout with their
ntdll.dll equivalent.
* security.cc: Ditto.
2011-04-29 Corinna Vinschen <corinna@vinschen.de>
* ntdll.h (IsEventSignalled): New inline function.

28
winsup/cygwin/advapi32.cc
View File

@ -19,27 +19,6 @@ details. */
SetLastError (RtlNtStatusToDosError (status)); \
return NT_SUCCESS (status);
BOOL WINAPI
AccessCheck (PSECURITY_DESCRIPTOR sd, HANDLE tok, DWORD access,
PGENERIC_MAPPING mapping, PPRIVILEGE_SET pset, LPDWORD psetlen,
LPDWORD granted, LPBOOL allowed)
{
NTSTATUS status, astatus;
status = NtAccessCheck (sd, tok, access, mapping, pset, psetlen, granted,
&astatus);
if (NT_SUCCESS (status))
*allowed = NT_SUCCESS (astatus);
DEFAULT_NTSTATUS_TO_BOOL_RETURN
}
BOOL WINAPI
PrivilegeCheck (HANDLE tok, PPRIVILEGE_SET pset, LPBOOL res)
{
NTSTATUS status = NtPrivilegeCheck (tok, pset, (PBOOLEAN) res);
DEFAULT_NTSTATUS_TO_BOOL_RETURN
}
BOOL WINAPI
EqualSid (PSID sid1, PSID sid2)
{
@ -75,13 +54,6 @@ MakeSelfRelativeSD (PSECURITY_DESCRIPTOR abs_sd, PSECURITY_DESCRIPTOR rel_sd,
DEFAULT_NTSTATUS_TO_BOOL_RETURN
}
BOOL WINAPI
OpenThreadToken (HANDLE thread, DWORD access, BOOL as_self, PHANDLE tok)
{
NTSTATUS status = NtOpenThreadToken (thread, access, as_self, tok);
DEFAULT_NTSTATUS_TO_BOOL_RETURN
}
BOOL WINAPI
RevertToSelf ()
{

26
winsup/cygwin/fhandler_tty.cc
View File

@ -1644,15 +1644,16 @@ fhandler_pty_master::pty_master_thread ()
security_descriptor sd;
HANDLE token;
PRIVILEGE_SET ps;
BOOL ret;
DWORD pid;
NTSTATUS status;
termios_printf ("Entered");
while (!exit && (ConnectNamedPipe (master_ctl, NULL) || GetLastError () == ERROR_PIPE_CONNECTED))
while (!exit && (ConnectNamedPipe (master_ctl, NULL)
|| GetLastError () == ERROR_PIPE_CONNECTED))
{
pipe_reply repl = { NULL, NULL, 0 };
bool deimp = false;
BOOL allow = FALSE;
NTSTATUS allow = STATUS_ACCESS_DENIED;
ACCESS_MASK access = EVENT_MODIFY_STATE;
HANDLE client = NULL;
@ -1678,17 +1679,22 @@ fhandler_pty_master::pty_master_thread ()
termios_printf ("ImpersonateNamedPipeClient, %E");
goto reply;
}
if (!OpenThreadToken (GetCurrentThread (), TOKEN_QUERY, TRUE, &token))
status = NtOpenThreadToken (GetCurrentThread (), TOKEN_QUERY, TRUE,
&token);
if (!NT_SUCCESS (status))
{
termios_printf ("OpenThreadToken, %E");
termios_printf ("NtOpenThreadToken, %p", status);
SetLastError (RtlNtStatusToDosError (status));
goto reply;
}
len = sizeof ps;
ret = AccessCheck (sd, token, access, &map, &ps, &len, &access, &allow);
CloseHandle (token);
if (!ret)
status = NtAccessCheck (sd, token, access, &map, &ps, &len, &access,
&allow);
NtClose (token);
if (!NT_SUCCESS (status))
{
termios_printf ("AccessCheck, %E");
termios_printf ("NtAccessCheck, %p", status);
SetLastError (RtlNtStatusToDosError (status));
goto reply;
}
if (!RevertToSelf ())
@ -1705,7 +1711,7 @@ fhandler_pty_master::pty_master_thread ()
exit = true;
goto reply;
}
if (allow)
if (NT_SUCCESS (allow))
{
client = OpenProcess (PROCESS_DUP_HANDLE, FALSE, pid);
if (!client)

26
winsup/cygwin/security.cc
View File

@ -972,11 +972,11 @@ set_file_attribute (HANDLE handle, path_conv &pc,
static int
check_access (security_descriptor &sd, GENERIC_MAPPING &mapping,
DWORD desired, int flags, bool effective)
ACCESS_MASK desired, int flags, bool effective)
{
int ret = -1;
BOOL status;
DWORD granted;
NTSTATUS status, allow;
ACCESS_MASK granted;
DWORD plen = sizeof (PRIVILEGE_SET) + 3 * sizeof (LUID_AND_ATTRIBUTES);
PPRIVILEGE_SET pset = (PPRIVILEGE_SET) alloca (plen);
HANDLE tok = ((effective && cygheap->user.issetuid ())
@ -995,9 +995,11 @@ check_access (security_descriptor &sd, GENERIC_MAPPING &mapping,
tok = hProcImpToken;
}
if (!AccessCheck (sd, tok, desired, &mapping, pset, &plen, &granted, &status))
status = NtAccessCheck (sd, tok, desired, &mapping, pset, &plen, &granted,
&allow);
if (!NT_SUCCESS (status))
__seterrno ();
else if (!status)
else if (!NT_SUCCESS (allow))
{
/* CV, 2006-10-16: Now, that's really weird. Imagine a user who has no
standard access to a file, but who has backup and restore privileges
@ -1006,12 +1008,14 @@ check_access (security_descriptor &sd, GENERIC_MAPPING &mapping,
when returning the access status. Otherwise, why bother with the
pset parameter, right?
But not so. AccessCheck actually returns a status of "false" here,
even though opening a file with backup resp. restore intent
even though opening a file with backup resp. restore intent
naturally succeeds for this user. This definitely spoils the results
of access(2) for administrative users or the SYSTEM account. So, in
case the access check fails, another check against the user's
backup/restore privileges has to be made. Sigh. */
int granted_flags = 0;
BOOLEAN has_priv;
if (flags & R_OK)
{
pset->PrivilegeCount = 1;
@ -1019,7 +1023,8 @@ check_access (security_descriptor &sd, GENERIC_MAPPING &mapping,
pset->Privilege[0].Luid.HighPart = 0L;
pset->Privilege[0].Luid.LowPart = SE_BACKUP_PRIVILEGE;
pset->Privilege[0].Attributes = 0;
if (PrivilegeCheck (tok, pset, &status) && status)
status = NtPrivilegeCheck (tok, pset, &has_priv);
if (NT_SUCCESS (status) && has_priv)
granted_flags |= R_OK;
}
if (flags & W_OK)
@ -1029,7 +1034,8 @@ check_access (security_descriptor &sd, GENERIC_MAPPING &mapping,
pset->Privilege[0].Luid.HighPart = 0L;
pset->Privilege[0].Luid.LowPart = SE_RESTORE_PRIVILEGE;
pset->Privilege[0].Attributes = 0;
if (PrivilegeCheck (tok, pset, &status) && status)
status = NtPrivilegeCheck (tok, pset, &has_priv);
if (NT_SUCCESS (status) && has_priv)
granted_flags |= W_OK;
}
if (granted_flags == flags)
@ -1047,7 +1053,7 @@ check_file_access (path_conv &pc, int flags, bool effective)
{
security_descriptor sd;
int ret = -1;
DWORD desired = 0;
ACCESS_MASK desired = 0;
if (flags & R_OK)
desired |= FILE_READ_DATA;
if (flags & W_OK)
@ -1069,7 +1075,7 @@ check_registry_access (HANDLE hdl, int flags, bool effective)
KEY_WRITE,
KEY_EXECUTE,
KEY_ALL_ACCESS };
DWORD desired = 0;
ACCESS_MASK desired = 0;
if (flags & R_OK)
desired |= KEY_ENUMERATE_SUB_KEYS;
if (flags & W_OK)