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advapi32: Allow GetFileSecurityA/W to work on files that have been opened already with restricted sharing flags. 

Only use the minimum required access rights for the information being retrieved.
This commit is contained in:
Rob Shearman 2007-10-02 15:56:35 +01:00 committed by Alexandre Julliard
parent 1262d7dbef
commit 00bc3d9e48
1 changed files with 8 additions and 1 deletions
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9
dlls/advapi32/security.c
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@ -1819,8 +1819,15 @@ GetFileSecurityW( LPCWSTR lpFileName,
{
HANDLE hfile;
NTSTATUS status;
DWORD access = 0;
hfile = CreateFileW( lpFileName, GENERIC_READ, FILE_SHARE_READ,
if (RequestedInformation & (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION|
DACL_SECURITY_INFORMATION))
access |= READ_CONTROL;
if (RequestedInformation & SACL_SECURITY_INFORMATION)
access |= ACCESS_SYSTEM_SECURITY;
hfile = CreateFileW( lpFileName, access, FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0 );
if ( hfile == INVALID_HANDLE_VALUE )
return FALSE;