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SDMgmt.Cpp
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SDMgmt.Cpp
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
#include "targetver.h"
#include <windows.h>
#include <stdio.h>
#include <conio.h>
#include <tchar.h>
#include <sddl.h>
#include "ntsecapi.h"
#include "dcomperm.h"
/*---------------------------------------------------------------------------*\
* NAME: CreateNewSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Creates a new security descriptor.
\*---------------------------------------------------------------------------*/
DWORD CreateNewSD (
SECURITY_DESCRIPTOR **ppSecurityDesc
)
{
PACL pAcl = NULL;
DWORD cbSid = 0;
PSID pSid = NULL;
PSID psidGroup = NULL;
PSID psidOwner = NULL;
DWORD dwReturnValue = ERROR_SUCCESS;
SID_IDENTIFIER_AUTHORITY SystemSidAuthority= SECURITY_NT_AUTHORITY;
if(!ppSecurityDesc) return ERROR_BAD_ARGUMENTS;
*ppSecurityDesc = NULL;
//Create a SID for the owner (BUILTIN\Administrators)
if ( ! AllocateAndInitializeSid ( &SystemSidAuthority, 2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0, 0, 0, 0, 0, 0, &pSid) )
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
cbSid = GetLengthSid (pSid);
*ppSecurityDesc = (SECURITY_DESCRIPTOR *) malloc (
sizeof (ACL) + (2 * cbSid) + sizeof (SECURITY_DESCRIPTOR));
if(!*ppSecurityDesc)
{
dwReturnValue = ERROR_OUTOFMEMORY;
goto CLEANUP;
}
psidGroup = (SID *) (*ppSecurityDesc + 1);
psidOwner = (SID *) (((BYTE *) psidGroup) + cbSid);
pAcl = (ACL *) (((BYTE *) psidOwner) + cbSid);
if (!InitializeSecurityDescriptor (*ppSecurityDesc, SECURITY_DESCRIPTOR_REVISION))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
if (!InitializeAcl (pAcl,
sizeof (ACL)+sizeof (ACCESS_ALLOWED_ACE)+cbSid,
ACL_REVISION2))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
if (!SetSecurityDescriptorDacl (*ppSecurityDesc, TRUE, pAcl, FALSE))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
memcpy (psidGroup, pSid, cbSid);
if (!SetSecurityDescriptorGroup (*ppSecurityDesc, psidGroup, FALSE))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
memcpy (psidOwner, pSid, cbSid);
if (!SetSecurityDescriptorOwner (*ppSecurityDesc, psidOwner, FALSE))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
CLEANUP:
if(dwReturnValue != ERROR_SUCCESS)
{
if(*ppSecurityDesc) free (*ppSecurityDesc);
}
if(pSid) FreeSid(pSid);
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: CanonicalizeSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Ensures the entire security descriptor is consistent with the new permission
* format.
\*---------------------------------------------------------------------------*/
DWORD CanonicalizeSD(PSECURITY_DESCRIPTOR pSD)
{
BOOL fSuccess = FALSE, fACLPresent = FALSE, fDefaulted = FALSE;
ACL* pACL = NULL;
if(IsLegacySecurityModel()) return ERROR_SUCCESS;
fSuccess = GetSecurityDescriptorDacl(pSD, &fACLPresent, &pACL, &fDefaulted);
if (fSuccess == FALSE)
{
return GetLastError();
}
ACCESS_MASK dwOtherRights = COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE_REMOTE |
COM_RIGHTS_ACTIVATE_LOCAL |
COM_RIGHTS_ACTIVATE_REMOTE;
DWORD dwSizeOfACL = sizeof(ACL);
ULONG_PTR ulptrACL = (ULONG_PTR)pACL;
PACE_HEADER pAceHeader = (PACE_HEADER)(ulptrACL + dwSizeOfACL);
PACCESS_MASK pAccessMask = (PACCESS_MASK)((ULONG_PTR)pAceHeader+sizeof(ACE_HEADER));
// Iterate through the ACE's in the ACL and canonicalize the representation
// Each ACE has a header and Mask Field as a minimum.
if ( pACL )
{
for ( int i = 0; i < pACL->AceCount ; i++)
{
DWORD dwError = NULL;
void* pNewAcl = NULL;
// Protect against bad ACL structure
if (((ULONG_PTR)pAceHeader-(ULONG_PTR)pACL) >= (pACL->AclSize-sizeof(ACCESS_MASK)))
{
return ERROR_INVALID_PARAMETER;
}
DWORD dwAceSize = pAceHeader->AceSize;
// Ensure minimum size ACE
if (dwAceSize < (sizeof(ACE_HEADER)+sizeof(ACCESS_MASK)))
{
return ERROR_INVALID_PARAMETER;
}
// Canonicalize AccessMask
if (*pAccessMask & COM_RIGHTS_EXECUTE)
{
// When COM_RIGHTS_EXECUTE is set but no other RIGHTS
// This means grant all other RIGHTS
if ((*pAccessMask & dwOtherRights) == 0)
{
*pAccessMask |= dwOtherRights;
}
}
else
{
// COM_RIGHTS_EXECUTE Not Set so clear all other RIGHTS bits
*pAccessMask &= ~dwOtherRights;
}
ulptrACL = (ULONG_PTR)pAceHeader;
pAceHeader = (PACE_HEADER)(ulptrACL + dwAceSize);
pAccessMask = (PACCESS_MASK)((ULONG_PTR)pAceHeader+sizeof(ACE_HEADER));
}
}
return ERROR_SUCCESS;
}
/*---------------------------------------------------------------------------*\
* NAME: SetLegacyAclDefaults
* --------------------------------------------------------------------------*
* DESCRIPTION: Adds the default ACEs to the supplied ACL as confgured in
* the legacy COM security model.
\*---------------------------------------------------------------------------*/
DWORD SetLegacyAclDefaults(
PACL pDacl,
DWORD dwSDType
)
{
DWORD dwReturnValue = ERROR_BAD_ARGUMENTS;
switch (dwSDType)
{
case SDTYPE_DEFAULT_LAUNCH:
case SDTYPE_APPLICATION_LAUNCH:
dwReturnValue = AddAccessAllowedACEToACL (&pDacl,
COM_RIGHTS_EXECUTE,
_T("SYSTEM"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (&pDacl,
COM_RIGHTS_EXECUTE,
_T("Administrators"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (&pDacl,
COM_RIGHTS_EXECUTE,
_T("Interactive"));
break;
case SDTYPE_DEFAULT_ACCESS:
case SDTYPE_APPLICATION_ACCESS:
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (&pDacl,
COM_RIGHTS_EXECUTE,
_T("SYSTEM"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (&pDacl,
COM_RIGHTS_EXECUTE,
_T("SELF"));
break;
default:
_tprintf(_T("WARNING: SetLegacyAclDefaults- Invalid security descriptor type.\n"));
break;
}
CLEANUP:
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: SetAclDefaults
* --------------------------------------------------------------------------*
* DESCRIPTION: Sets the default ACEs in a ACL for the enhanced COM
* security model.
\*---------------------------------------------------------------------------*/
DWORD SetAclDefaults(
PACL *ppDacl,
DWORD dwSDType
)
{
DWORD dwReturnValue = ERROR_BAD_ARGUMENTS;
switch (dwSDType)
{
case SDTYPE_MACHINE_LAUNCH:
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_ACTIVATE_REMOTE |
COM_RIGHTS_EXECUTE_REMOTE |
COM_RIGHTS_ACTIVATE_LOCAL |
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("Administrators"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_ACTIVATE_REMOTE |
COM_RIGHTS_EXECUTE_REMOTE |
COM_RIGHTS_ACTIVATE_LOCAL |
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("Offer Remote Assistance Helpers"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_ACTIVATE_LOCAL |
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("Everyone"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
break;
case SDTYPE_MACHINE_ACCESS:
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_EXECUTE_REMOTE |
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("Everyone"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("Everyone"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
break;
case SDTYPE_DEFAULT_LAUNCH:
case SDTYPE_APPLICATION_LAUNCH:
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_ACTIVATE_REMOTE |
COM_RIGHTS_EXECUTE_REMOTE |
COM_RIGHTS_ACTIVATE_LOCAL |
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("SYSTEM"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_ACTIVATE_REMOTE |
COM_RIGHTS_EXECUTE_REMOTE |
COM_RIGHTS_ACTIVATE_LOCAL |
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("Administrators"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_ACTIVATE_REMOTE |
COM_RIGHTS_EXECUTE_REMOTE |
COM_RIGHTS_ACTIVATE_LOCAL |
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("Interactive"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
break;
case SDTYPE_DEFAULT_ACCESS:
case SDTYPE_APPLICATION_ACCESS:
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("SYSTEM"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
dwReturnValue = AddAccessAllowedACEToACL (ppDacl,
COM_RIGHTS_EXECUTE_REMOTE |
COM_RIGHTS_EXECUTE_LOCAL |
COM_RIGHTS_EXECUTE,
_T("SELF"));
if(dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
break;
default:
_tprintf(_T("WARNING: SetAclDefaults- Invalid security descriptor type.\n"));
break;
}
CLEANUP:
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: MakeSDAbsolute
* --------------------------------------------------------------------------*
* DESCRIPTION: Takes a self-relative security descriptor and returns a
* newly created absolute security descriptor.
\*---------------------------------------------------------------------------*/
DWORD MakeSDAbsolute (
PSECURITY_DESCRIPTOR psidOld,
PSECURITY_DESCRIPTOR *psidNew
)
{
PSECURITY_DESCRIPTOR pSid = NULL;
DWORD cbDescriptor = 0;
DWORD cbDacl = 0;
DWORD cbSacl = 0;
DWORD cbOwnerSID = 0;
DWORD cbGroupSID = 0;
PACL pDacl = NULL;
PACL pSacl = NULL;
PSID psidOwner = NULL;
PSID psidGroup = NULL;
BOOL fPresent = FALSE;
BOOL fSystemDefault = FALSE;
DWORD dwReturnValue = ERROR_SUCCESS;
// Get SACL
if (!GetSecurityDescriptorSacl (psidOld, &fPresent, &pSacl, &fSystemDefault))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
if (pSacl && fPresent)
{
cbSacl = pSacl->AclSize;
}
// Get DACL
if (!GetSecurityDescriptorDacl (psidOld, &fPresent, &pDacl, &fSystemDefault))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
if (pDacl && fPresent)
{
cbDacl = pDacl->AclSize;
}
// Get Owner
if (!GetSecurityDescriptorOwner (psidOld, &psidOwner, &fSystemDefault))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
cbOwnerSID = GetLengthSid (psidOwner);
// Get Group
if (!GetSecurityDescriptorGroup (psidOld, &psidGroup, &fSystemDefault))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
cbGroupSID = GetLengthSid (psidGroup);
// Do the conversion
cbDescriptor = 0;
MakeAbsoluteSD (psidOld, pSid, &cbDescriptor, pDacl, &cbDacl, pSacl,
&cbSacl, psidOwner, &cbOwnerSID, psidGroup,
&cbGroupSID);
pSid = (PSECURITY_DESCRIPTOR) malloc(cbDescriptor);
if(!pSid)
{
dwReturnValue = ERROR_OUTOFMEMORY;
goto CLEANUP;
}
ZeroMemory(pSid, cbDescriptor);
if (!InitializeSecurityDescriptor (pSid, SECURITY_DESCRIPTOR_REVISION))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
if (!MakeAbsoluteSD (psidOld, pSid, &cbDescriptor, pDacl, &cbDacl, pSacl,
&cbSacl, psidOwner, &cbOwnerSID, psidGroup,
&cbGroupSID))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
CLEANUP:
if(dwReturnValue != ERROR_SUCCESS && pSid)
{
free(pSid);
pSid = NULL;
}
*psidNew = pSid;
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: SetNamedValueSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Copies the supplied security descriptor to the registry.
\*---------------------------------------------------------------------------*/
DWORD SetNamedValueSD (
HKEY hkeyRoot,
LPTSTR tszKeyName,
LPTSTR tszValueName,
SECURITY_DESCRIPTOR *pSecurityDesc
)
{
DWORD dwReturnValue = ERROR_SUCCESS;
DWORD dwDisposition = 0;
HKEY hkeyReg = NULL;
// Create new key or open existing key
dwReturnValue = RegCreateKeyEx (hkeyRoot, tszKeyName, 0, _T(""), 0, KEY_ALL_ACCESS, NULL, &hkeyReg, &dwDisposition);
if (dwReturnValue != ERROR_SUCCESS)
{
goto CLEANUP;
}
// Write the security descriptor
dwReturnValue = RegSetValueEx (hkeyReg, tszValueName, 0, REG_BINARY, (LPBYTE) pSecurityDesc, GetSecurityDescriptorLength (pSecurityDesc));
if (dwReturnValue != ERROR_SUCCESS)
{
goto CLEANUP;
}
CLEANUP:
if(hkeyReg) RegCloseKey (hkeyReg);
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: GetNamedValueSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Retrieves a designated security descriptor from the
* registry.
\*---------------------------------------------------------------------------*/
DWORD GetNamedValueSD (
HKEY hkeyRoot,
LPTSTR tszKeyName,
LPTSTR tszValueName,
SECURITY_DESCRIPTOR **ppSecurityDesc,
BOOL *psdNew
)
{
DWORD dwReturnValue = ERROR_SUCCESS;
HKEY hkeyReg = NULL;
DWORD dwType = 0;
DWORD cbSize = 0;
if(!ppSecurityDesc) return ERROR_BAD_ARGUMENTS;
if(psdNew) *psdNew = FALSE;
*ppSecurityDesc = NULL;
// Get the security descriptor from the named value. If it doesn't
// exist, create a fresh one.
dwReturnValue = RegOpenKeyEx (hkeyRoot, tszKeyName, 0, KEY_ALL_ACCESS, &hkeyReg);
if (dwReturnValue != ERROR_SUCCESS)
{
if(dwReturnValue == ERROR_FILE_NOT_FOUND)
{
goto CLEANUP;
}
return dwReturnValue;
}
dwReturnValue = RegQueryValueEx (hkeyReg, tszValueName, NULL, &dwType, NULL, &cbSize);
if (dwReturnValue != ERROR_SUCCESS && dwReturnValue != ERROR_INSUFFICIENT_BUFFER)
{
goto CLEANUP;
}
*ppSecurityDesc = (SECURITY_DESCRIPTOR *) malloc (cbSize);
dwReturnValue = RegQueryValueEx (hkeyReg, tszValueName, NULL, &dwType, (LPBYTE) *ppSecurityDesc, &cbSize);
CLEANUP:
if(dwReturnValue != ERROR_SUCCESS)
{
if(*ppSecurityDesc) free(*ppSecurityDesc);
*ppSecurityDesc = NULL;
if(psdNew)
{
dwReturnValue = CreateNewSD (ppSecurityDesc);
if (dwReturnValue == ERROR_SUCCESS)
{
*psdNew = TRUE;
}
}
}
if(hkeyReg) RegCloseKey (hkeyReg);
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: ListNamedValueSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Displays the designated security descriptor.
\*---------------------------------------------------------------------------*/
DWORD ListNamedValueSD (
HKEY hkeyRoot,
LPTSTR tszKeyName,
LPTSTR tszValueName,
DWORD dwSDType,
BOOL fXml
)
{
DWORD dwReturnValue = ERROR_SUCCESS;
SECURITY_DESCRIPTOR *pSD = NULL;
BOOL fPresent = FALSE;
BOOL fDefaultDACL = FALSE;
PACL dacl = NULL;
dwReturnValue = GetNamedValueSD (hkeyRoot, tszKeyName, tszValueName, &pSD, NULL);
if (dwReturnValue != ERROR_SUCCESS)
{
if (fXml)
_tprintf (_T("<permissions default=\"true\"/>\n"));
else
_tprintf (_T("<Using Default Permissions>\n"));
goto CLEANUP;
}
if (!GetSecurityDescriptorDacl (pSD, &fPresent, &dacl, &fDefaultDACL))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
if (!fPresent)
{
if (fXml)
_tprintf (_T("<permissions/>\n"));
else
_tprintf (_T("<Access is denied to everyone>\n"));
goto CLEANUP;
}
ListACL (dacl, dwSDType, fXml);
CLEANUP:
if(pSD) free (pSD);
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: AddPrincipalToNamedValueSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Retrieves the designated security descriptor from the
* registry and adds an ACE for the designated principal.
\*---------------------------------------------------------------------------*/
DWORD AddPrincipalToNamedValueSD (
HKEY hkeyRoot,
LPTSTR tszKeyName,
LPTSTR tszValueName,
LPTSTR tszPrincipal,
BOOL fPermit,
DWORD dwAccessMask,
DWORD dwSDType
)
{
DWORD dwReturnValue = ERROR_SUCCESS;
SECURITY_DESCRIPTOR *pSD = NULL;
SECURITY_DESCRIPTOR *psdSelfRelative = NULL;
SECURITY_DESCRIPTOR *psdAbsolute = NULL;
DWORD cbSecurityDesc = 0;
BOOL fPresent = FALSE;
BOOL fDefaultDACL = FALSE;
PACL pDacl = NULL;
BOOL fNewSD = FALSE;
dwReturnValue = GetNamedValueSD (hkeyRoot, tszKeyName, tszValueName, &pSD, &fNewSD);
// Get security descriptor from registry or create a new one
if (dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
if (!GetSecurityDescriptorDacl (pSD, &fPresent, &pDacl, &fDefaultDACL))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
if (fNewSD)
{
dwReturnValue = SetAclDefaults(&pDacl, dwSDType);
if (dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
}
// Add the tszPrincipal that the caller wants added
if (fPermit)
{
dwReturnValue = AddAccessAllowedACEToACL (&pDacl, dwAccessMask, tszPrincipal);
}
else
{
dwReturnValue = AddAccessDeniedACEToACL (&pDacl, dwAccessMask, tszPrincipal);
}
if (dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
// Make the security descriptor absolute if it isn't new
if (!fNewSD)
{
dwReturnValue = MakeSDAbsolute ((PSECURITY_DESCRIPTOR) pSD, (PSECURITY_DESCRIPTOR *) &psdAbsolute);
if (dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
}
else
{
psdAbsolute = pSD;
}
// Set the discretionary ACL on the security descriptor
if (!SetSecurityDescriptorDacl (psdAbsolute, TRUE, pDacl, FALSE))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
//Now ensure consistency of the SD
dwReturnValue = CanonicalizeSD(psdAbsolute);
if (dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
// Make the security descriptor self-relative so that we can
// store it in the registry
cbSecurityDesc = 0;
MakeSelfRelativeSD (psdAbsolute, psdSelfRelative, &cbSecurityDesc);
psdSelfRelative = (SECURITY_DESCRIPTOR *) malloc (cbSecurityDesc);
if(!psdSelfRelative)
{
dwReturnValue = ERROR_OUTOFMEMORY;
goto CLEANUP;
}
if (!MakeSelfRelativeSD (psdAbsolute, psdSelfRelative, &cbSecurityDesc))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
// Store the security descriptor in the registry
SetNamedValueSD (hkeyRoot, tszKeyName, tszValueName, psdSelfRelative);
CLEANUP:
if(pSD) free (pSD);
if(psdSelfRelative) free (psdSelfRelative);
if(psdAbsolute && pSD != psdAbsolute) free (psdAbsolute);
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: UpdatePrincipalInNamedValueSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Retrieves the designated security descriptor from the
* registry and updates all ACLs that belong to the named principal.
\*---------------------------------------------------------------------------*/
DWORD UpdatePrincipalInNamedValueSD (
HKEY hkeyRoot,
LPTSTR tszKeyName,
LPTSTR tszValueName,
LPTSTR tszPrincipal,
DWORD dwAccessMask,
BOOL fRemove,
DWORD fAceType
)
{
DWORD dwReturnValue = ERROR_SUCCESS;
SECURITY_DESCRIPTOR *pSD = NULL;
SECURITY_DESCRIPTOR *psdSelfRelative = NULL;
SECURITY_DESCRIPTOR *psdAbsolute = NULL;
DWORD cbSecurityDesc = 0;
BOOL fPresent = FALSE;
BOOL fDefaultDACL = FALSE;
PACL pDacl = NULL;
// Get security descriptor from registry
dwReturnValue = GetNamedValueSD (hkeyRoot, tszKeyName, tszValueName, &pSD, NULL);
if (dwReturnValue != ERROR_SUCCESS)
{
if(dwReturnValue == ERROR_FILE_NOT_FOUND && fRemove)
{
dwReturnValue = ERROR_SUCCESS;
}
goto CLEANUP;
}
if (!GetSecurityDescriptorDacl (pSD, &fPresent, &pDacl, &fDefaultDACL))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
// Update the tszPrincipal that the caller wants to change
dwReturnValue = UpdatePrincipalInACL (pDacl, tszPrincipal, dwAccessMask, fRemove, fAceType);
if(dwReturnValue == ERROR_FILE_NOT_FOUND)
{
dwReturnValue = ERROR_SUCCESS;
goto CLEANUP;
}
else if (dwReturnValue != ERROR_SUCCESS)
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
// Make the security descriptor absolute
dwReturnValue = MakeSDAbsolute ((PSECURITY_DESCRIPTOR) pSD, (PSECURITY_DESCRIPTOR *) &psdAbsolute);
if (dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
// Set the discretionary ACL on the security descriptor
if (!SetSecurityDescriptorDacl (psdAbsolute, TRUE, pDacl, FALSE))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
//Now ensure consistency of the SD
dwReturnValue = CanonicalizeSD(psdAbsolute);
if (dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
// Make the security descriptor self-relative so that we can
// store it in the registry
cbSecurityDesc = 0;
MakeSelfRelativeSD (psdAbsolute, psdSelfRelative, &cbSecurityDesc);
psdSelfRelative = (SECURITY_DESCRIPTOR *) malloc (cbSecurityDesc);
if (!MakeSelfRelativeSD (psdAbsolute, psdSelfRelative, &cbSecurityDesc))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
// Store the security descriptor in the registry
dwReturnValue = SetNamedValueSD (hkeyRoot, tszKeyName, tszValueName, psdSelfRelative);
CLEANUP:
if(pSD) free (pSD);
if(psdSelfRelative) free (psdSelfRelative);
if(psdAbsolute) free (psdAbsolute);
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: RemovePrincipalFromNamedValueSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Retrieves the designated security descriptor from the
* registry and removes all ACLs that belong to the named principal.
\*---------------------------------------------------------------------------*/
DWORD RemovePrincipalFromNamedValueSD (
HKEY hkeyRoot,
LPTSTR tszKeyName,
LPTSTR tszValueName,
LPTSTR tszPrincipal,
DWORD fAceType
)
{
DWORD dwReturnValue = ERROR_SUCCESS;
SECURITY_DESCRIPTOR *pSD = NULL;
SECURITY_DESCRIPTOR *psdSelfRelative = NULL;
SECURITY_DESCRIPTOR *psdAbsolute = NULL;
DWORD cbSecurityDesc = 0;
BOOL fPresent = FALSE;
BOOL fDefaultDACL = FALSE;
PACL pDacl = NULL;
dwReturnValue = GetNamedValueSD (hkeyRoot, tszKeyName, tszValueName, &pSD, NULL);
// Get security descriptor from registry or create a new one
if (dwReturnValue != ERROR_SUCCESS)
{
if(dwReturnValue == ERROR_FILE_NOT_FOUND)
{
dwReturnValue = ERROR_SUCCESS;
}
goto CLEANUP;
}
if (!GetSecurityDescriptorDacl (pSD, &fPresent, &pDacl, &fDefaultDACL))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
// Remove the tszPrincipal that the caller wants removed
dwReturnValue = RemovePrincipalFromACL (pDacl, tszPrincipal, fAceType);
if(dwReturnValue == ERROR_FILE_NOT_FOUND)
{
dwReturnValue = ERROR_SUCCESS;
goto CLEANUP;
}
else if (dwReturnValue != ERROR_SUCCESS)
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
// Make the security descriptor absolute if it isn't new
dwReturnValue = MakeSDAbsolute ((PSECURITY_DESCRIPTOR) pSD, (PSECURITY_DESCRIPTOR *) &psdAbsolute);
if (dwReturnValue != ERROR_SUCCESS) goto CLEANUP;
// Set the discretionary ACL on the security descriptor
if (!SetSecurityDescriptorDacl (psdAbsolute, TRUE, pDacl, FALSE))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
// Make the security descriptor self-relative so that we can
// store it in the registry
cbSecurityDesc = 0;
MakeSelfRelativeSD (psdAbsolute, psdSelfRelative, &cbSecurityDesc);
psdSelfRelative = (SECURITY_DESCRIPTOR *) malloc (cbSecurityDesc);
if (!MakeSelfRelativeSD (psdAbsolute, psdSelfRelative, &cbSecurityDesc))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
// Store the security descriptor in the registry
dwReturnValue = SetNamedValueSD (hkeyRoot, tszKeyName, tszValueName, psdSelfRelative);
CLEANUP:
if(pSD) free (pSD);
if(psdSelfRelative) free (psdSelfRelative);
if(psdAbsolute) free (psdAbsolute);
return dwReturnValue;
}
/*---------------------------------------------------------------------------*\
* NAME: ClearNamedValueSD
* --------------------------------------------------------------------------*
* DESCRIPTION: Retrieves the designated security descriptor from the
* registry and removes all ACLs from it.
\*---------------------------------------------------------------------------*/
DWORD ClearNamedValueSD (
HKEY hkeyRoot,
LPTSTR tszKeyName,
LPTSTR tszValueName
)
{
DWORD dwReturnValue = ERROR_SUCCESS;
SECURITY_DESCRIPTOR *pSD = NULL;
SECURITY_DESCRIPTOR *psdSelfRelative = NULL;
SECURITY_DESCRIPTOR *psdAbsolute = NULL;
DWORD cbSecurityDesc = 0;
BOOL fPresent = FALSE;
BOOL fDefaultDACL = FALSE;
PACL pDacl = NULL;
BOOL fNewSD = FALSE;
dwReturnValue = GetNamedValueSD (hkeyRoot, tszKeyName, tszValueName, &pSD, &fNewSD);
// Get security descriptor from registry or create a new one
if (!GetSecurityDescriptorDacl (pSD, &fPresent, &pDacl, &fDefaultDACL))
{
dwReturnValue = GetLastError();
goto CLEANUP;
}
if (!InitializeAcl(pDacl, sizeof(ACL), ACL_REVISION))
{
dwReturnValue = GetLastError();
goto CLEANUP;