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CNTFS - A simple lib for managing NTFS permissions and audit settings.

, 22 Oct 2003
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CNTFS is a simple lib for setting NTFS permissions and audit settings.

Sample Image - ACLEditor.jpg


CNTFS lib is a simple C++ wrapper for many of the Microsoft security calls such as: GetNamedSecurityInfo, GetAclInformation, AddAccessAllowedAceEx and many others. CNTFS is used to set NTFS permissions and audit settings on files and folders. It's a programmatic alternative to using utilities such as xcacls.exe.


The following methods are supported in the lib:

int DeleteDACL(CString & I_objPath, BOOL I_removeInheritance)

int DeleteSACL(CString & I_objPath, BOOL I_removeInheritance)

int RemoveInheritance(CString & I_objPath)

int TakeOwnership(CString & I_objPath, CString & I_newOwner)

int AddACEToDACL(CString & I_objPath, 
                 CString & I_securityPrincipal, 
                 DWORD I_objPermission)

int AddACEToSACL(CString & I_objPath, 
                 CString & I_securityPrincipal, 
                 DWORD I_objPermission,
                 BOOL I_auditSuccess,
                 BOOL I_auditFailure)


ACLEditor is a test application for the CNTFS lib. One of the more tricky aspects of CNTFS is the use of access mask flags. Winnt.h defines access mask flags that can be OR'd together. For example, the Modify permission consists of: FILE_GENERIC_READ | FILE_GENERIC_WRITE | FILE_GENERIC_EXECUTE | DELETE. Among other things, ACLEditor demonstrates the use of access masks in setting NTFS permissions.


Be sure to have the Microsoft Platform SDK in c:\program files\Microsoft SDK. The project settings will reference the include files directory. I've run the lib through Rational Purify so all the mem leaks should be gone.

Any comments or suggestions are welcome.


Version History

  • Version 1.1 - (Oct 23, 2003) Added support for modifying DACLs and SACLs on registry keys. Consolidated RemoveDACLInheritance and RemoveSACLInheritance into RemoveInheritance method by adding aclType enum.
  • Version 1.0 - (Apr 4, 2003) Initial Release.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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About the Author

Kevin Hilscher
Web Developer
Canada Canada
No Biography provided

Comments and Discussions

BugDoes not work on Windows 7 Pinmemberrhythm16-May-12 8:37 
GeneralBug in ResolveSID Pinmemberbrianbacon15-Jan-11 7:26 
Generalsome wrong on 2t disk simulator Pinmembernhchmg15-Dec-10 23:54 
GeneralMy vote of 4 :) PinmemberKushagra Tiwari3-Nov-09 23:57 
QuestionDelete account PinmemberJack6910487121-Oct-08 3:53 
GeneralCrash on FAT file system PinmemberMember 36743904-Aug-08 3:07 
QuestionCNTFS Java Example ? Pinmemberbelaie_maqsood27-Apr-06 12:02 
Generalhelp !! it's not working in this case PinsussAnonymous26-Aug-05 17:26 
QuestionWhat about NetFileEnum() PinmemberAlex Evans29-Oct-04 0:40 
GeneralPerfect PinmemberSteve Schaneville21-Oct-03 8:22 
GeneralRe: Perfect PinmemberAlex Evans29-Oct-04 0:43 
GeneralERROR- Missing More Files !!! PinmemberTV Mogul11-Apr-03 7:25 
GeneralRe: ERROR- Missing More Files !!! PinmemberAndreas Saurwein11-Apr-03 7:41 
GeneralRe: ERROR- Missing More Files !!! Pinmemberyaron_gvili18-Apr-04 7:10 
QuestionRe: ERROR- Missing More Files !!! Pinmembertlongman7-Jan-07 16:17 
GeneralAddAccessAllowedAceEx - Only availabe on win 2000 and later PinmemberChristoph Weber7-Apr-03 23:39 
GeneralRe: AddAccessAllowedAceEx - Only availabe on win 2000 and later PinmemberKevin Hilscher8-Apr-03 17:53 
GeneralWarning: Code Won't Compile! PinmemberTV Mogul6-Apr-03 2:22 
GeneralRe: Warning: Code Won't Compile! PinmemberRyan Binns6-Apr-03 5:02 
GeneralRe: Warning: Code Won't Compile! PinmemberTV Mogul7-Apr-03 7:06 
GeneralRe: Warning: Code Won't Compile! PinmemberRyan Binns7-Apr-03 14:48 
GeneralRe: Warning: Code Won't Compile! Pinmemberkhilscher6-Apr-03 6:09 
GeneralRe: Warning: Code Won't Compile! PinsussAnonymous25-Jun-05 0:40 
Several errors including this one are resolved by installing visual studio service pack 2 or later, the latest one is available at:
Generaldemo project size Pinmember.S.Rod.5-Apr-03 5:45 
GeneralRe: demo project size Pinmemberkhilscher5-Apr-03 13:39 
GeneralOmmission- Forgot PROTECTED_DACL_SECURITY_INFORMATION PinmemberTV Mogul6-Apr-03 2:11 
General[Msg Deleted] Pinmemberguppy028-Aug-05 3:23 

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