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* security.cc (get_reg_security): New static function.

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(get_nt_object_security): Call get_reg_security for registry keys
	to circumvent problems with predefined registry keys.
This commit is contained in:
Corinna Vinschen 2005-08-08 16:30:15 +00:00
parent af925fe4fa
commit 2ab8ea6738
2 changed files with 46 additions and 0 deletions
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6
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,9 @@
2005-08-08 Corinna Vinschen <corinna@vinschen.de>
* security.cc (get_reg_security): New static function.
(get_nt_object_security): Call get_reg_security for registry keys
to circumvent problems with predefined registry keys.
2005-08-08 Corinna Vinschen <corinna@vinschen.de>
* fhandler_process.cc (fhandler_process::open): Allow opening of

40
winsup/cygwin/security.cc
View File

@ -1340,12 +1340,52 @@ get_nt_attribute (const char *file, mode_t *attribute,
get_info_from_sd (sd, attribute, uidret, gidret);
}
static int
get_reg_security (HANDLE handle, security_descriptor &sd_ret)
{
LONG ret;
DWORD len = 0;
ret = RegGetKeySecurity ((HKEY) handle,
DACL_SECURITY_INFORMATION
| GROUP_SECURITY_INFORMATION
| OWNER_SECURITY_INFORMATION,
sd_ret, &len);
if (ret == ERROR_INSUFFICIENT_BUFFER)
{
if (!sd_ret.malloc (len))
set_errno (ENOMEM);
else
ret = RegGetKeySecurity ((HKEY) handle,
DACL_SECURITY_INFORMATION
| GROUP_SECURITY_INFORMATION
| OWNER_SECURITY_INFORMATION,
sd_ret, &len);
}
if (ret != STATUS_SUCCESS)
{
__seterrno ();
return -1;
}
return 0;
}
int
get_nt_object_security (HANDLE handle, SE_OBJECT_TYPE object_type,
security_descriptor &sd_ret)
{
NTSTATUS ret;
ULONG len = 0;
/* Unfortunately, NtQuerySecurityObject doesn't work on predefined registry
keys like HKEY_LOCAL_MACHINE. It fails with "Invalid Handle". So we
have to retreat to the Win32 registry functions for registry keys.
What bugs me is that RegGetKeySecurity is obviously just a wrapper
around NtQuerySecurityObject, but there seems to be no function to
convert pseudo HKEY values to real handles. */
if (object_type == SE_REGISTRY_KEY)
return get_reg_security (handle, sd_ret);
ret = NtQuerySecurityObject (handle,
DACL_SECURITY_INFORMATION
| GROUP_SECURITY_INFORMATION