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windows-nt/Source/XPSP1/NT/termsrv/admtools/c2config/c2funcs/guestact.c

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/*++
Copyright (c) 1994 Microsoft Corporation
Module Name:
guestact.c
Abstract:
functions to enable/disable the guest account
Author:
Bob Watson (a-robw)
Revision History:
23 Dec 94
--*/
#include <nt.h>
#include <ntrtl.h>
#include <nturtl.h>
#include <ntsam.h>
#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <c2dll.h>
#include <c2inc.h>
#include <c2utils.h>
#include "c2funcs.h"
#include "c2funres.h"
// define action codes here. They are only meaningful in the
// context of this module.
#define AC_GUEST_ACCT_NOCHANGE 0
#define AC_GUEST_ACCT_UPDATE 1
// Account states
#define GUEST_ACCT_NOT_FOUND 0
#define GUEST_ACCT_ENABLED 1
#define GUEST_ACCT_DISABLED 2
static WCHAR szGuest[] = L"Guest";
#define GUEST_STRLEN 5
#define SECURE C2DLL_C2
static
LONG
IsGuestAccountEnabled(
)
{
SAM_HANDLE hsamObject;
SAM_HANDLE hsamDomain;
PSID psidDomain;
SAM_ENUMERATE_HANDLE hSamEnum;
PSAM_RID_ENUMERATION pRidEnum;
PVOID pvEnumBuffer;
ULONG ulEnumCount;
ULONG i;
LONG lReturn = GUEST_ACCT_NOT_FOUND;
int nCompare;
ULONG lTotalAvailable, lTotalReturned, lReturnedEntryCount;
NTSTATUS ntstat;
LPVOID pBuffer;
PDOMAIN_DISPLAY_USER pdduData;
PDOMAIN_DISPLAY_USER pdduThisUser;
SET_WAIT_CURSOR;
// connect to SAM on this machine
ntstat = SamConnect((PUNICODE_STRING)NULL, &hsamObject,
SAM_SERVER_ALL_ACCESS, (POBJECT_ATTRIBUTES)NULL);
if (ntstat == STATUS_SUCCESS) {
// Ask SAM for the domains on this server.
hSamEnum = 0;
ntstat = SamEnumerateDomainsInSamServer(
hsamObject,
&hSamEnum,
&pvEnumBuffer,
1024,
&ulEnumCount);
if ((ntstat == STATUS_SUCCESS) || (ntstat == STATUS_MORE_ENTRIES)) {
// look up only the first entry
pRidEnum = (PSAM_RID_ENUMERATION) pvEnumBuffer;
// get SID of domain
ntstat = SamLookupDomainInSamServer (
hsamObject,
&pRidEnum->Name,
&psidDomain);
if (ntstat == STATUS_SUCCESS) {
// open handle to this domain
ntstat = SamOpenDomain (
hsamObject,
DOMAIN_EXECUTE,
psidDomain,
&hsamDomain);
if (ntstat == STATUS_SUCCESS) {
// get password policy for this domain
pBuffer = NULL;
ntstat = SamQueryDisplayInformation (
hsamDomain,
DomainDisplayUser,
0, 100, 32768,
&lTotalAvailable,
&lTotalReturned,
&lReturnedEntryCount,
(PVOID *)&pBuffer);
if (ntstat == STATUS_SUCCESS) {
pdduData = (PDOMAIN_DISPLAY_USER)pBuffer;
for (i=0; i<lReturnedEntryCount; i++) {
pdduThisUser = &pdduData[i];
nCompare = CompareStringW (
GetUserDefaultLCID(),
(NORM_IGNORECASE | SORT_STRINGSORT),
szGuest,
GUEST_STRLEN,
pdduThisUser->LogonName.Buffer,
(pdduThisUser->LogonName.Length / sizeof(WCHAR)));
if (nCompare == 2) {
// guest account found
if ((pdduThisUser->AccountControl & USER_ACCOUNT_DISABLED) ==
USER_ACCOUNT_DISABLED) {
lReturn = GUEST_ACCT_DISABLED;
} else {
lReturn = GUEST_ACCT_ENABLED;
}
break; // bail out since the guest acct was found
}
}
ntstat = SamFreeMemory (pBuffer);
}
// close handle
SamCloseHandle (hsamDomain);
}
}
SamFreeMemory(pvEnumBuffer);
}
SamCloseHandle (hsamObject);
}
SetLastError (RtlNtStatusToDosError(ntstat));
SET_ARROW_CURSOR;
return lReturn;
}
static
BOOL
EnableGuestAccount (
BOOL bEnable // TRUE = enable, FALSE = disable
)
{
SAM_HANDLE hsamObject;
SAM_HANDLE hsamDomain;
SAM_HANDLE hsamUser;
PSID psidDomain;
SAM_ENUMERATE_HANDLE hSamEnum;
PSAM_RID_ENUMERATION pRidEnum;
PVOID pvEnumBuffer;
ULONG ulEnumCount;
ULONG i;
BOOL bReturn = FALSE;
BOOL bAccount;
int nCompare;
ULONG lTotalAvailable, lTotalReturned, lReturnedEntryCount;
NTSTATUS ntstat;
LPVOID pBuffer;
PDOMAIN_DISPLAY_USER pdduData;
PDOMAIN_DISPLAY_USER pdduThisUser;
PUSER_CONTROL_INFORMATION puciData;
SET_WAIT_CURSOR;
// connect to SAM on this machine
ntstat = SamConnect((PUNICODE_STRING)NULL, &hsamObject,
SAM_SERVER_ALL_ACCESS, (POBJECT_ATTRIBUTES)NULL);
if (ntstat == STATUS_SUCCESS) {
// Ask SAM for the domains on this server.
hSamEnum = 0;
ntstat = SamEnumerateDomainsInSamServer(
hsamObject,
&hSamEnum,
&pvEnumBuffer,
1024,
&ulEnumCount);
if ((ntstat == STATUS_SUCCESS) || (ntstat == STATUS_MORE_ENTRIES)) {
// look up only the first entry
pRidEnum = (PSAM_RID_ENUMERATION) pvEnumBuffer;
// get SID of domain
ntstat = SamLookupDomainInSamServer (
hsamObject,
&pRidEnum->Name,
&psidDomain);
if (ntstat == STATUS_SUCCESS) {
// open handle to this domain
ntstat = SamOpenDomain (
hsamObject,
DOMAIN_EXECUTE,
psidDomain,
&hsamDomain);
if (ntstat == STATUS_SUCCESS) {
// get password policy for this domain
pBuffer = NULL;
ntstat = SamQueryDisplayInformation (
hsamDomain,
DomainDisplayUser,
0, 100, 32768,
&lTotalAvailable,
&lTotalReturned,
&lReturnedEntryCount,
(PVOID *)&pBuffer);
if (ntstat == STATUS_SUCCESS) {
pdduData = (PDOMAIN_DISPLAY_USER)pBuffer;
for (i=0; i<lReturnedEntryCount; i++) {
pdduThisUser = &pdduData[i];
nCompare = CompareStringW (
GetUserDefaultLCID(),
(NORM_IGNORECASE | SORT_STRINGSORT),
szGuest,
GUEST_STRLEN,
pdduThisUser->LogonName.Buffer,
(pdduThisUser->LogonName.Length / sizeof(WCHAR)));
if (nCompare == 2) {
// guest account found
bAccount = !((pdduThisUser->AccountControl & USER_ACCOUNT_DISABLED) ==
USER_ACCOUNT_DISABLED);
if (bAccount == bEnable) {
// account is already in the desired
// state so bail out here
bReturn = TRUE;
break;
} else {
// account needs to be updated so open
// the user data
ntstat = SamOpenUser (
hsamDomain,
USER_ALL_ACCESS,
pdduThisUser->Rid,
&hsamUser);
if (ntstat == STATUS_SUCCESS) {
ntstat = SamQueryInformationUser (
hsamUser,
UserControlInformation,
(PVOID *)&puciData);
if (ntstat == STATUS_SUCCESS) {
// enable/disable account
if (bEnable) {
// clear disable bit
puciData->UserAccountControl &=
~USER_ACCOUNT_DISABLED;
} else {
// set disable bit
puciData->UserAccountControl |=
USER_ACCOUNT_DISABLED;
}
// update value
ntstat = SamSetInformationUser (
hsamUser,
UserControlInformation,
(PVOID)puciData);
if (ntstat == STATUS_SUCCESS) {
bReturn = TRUE;
}
SamFreeMemory (puciData);
}
SamCloseHandle (hsamUser);
}
}
break; // bail out since the guest acct was found
}
}
ntstat = SamFreeMemory (pBuffer);
}
// close handle
SamCloseHandle (hsamDomain);
}
}
SamFreeMemory(pvEnumBuffer);
}
SamCloseHandle (hsamObject);
}
SetLastError (RtlNtStatusToDosError(ntstat));
SET_ARROW_CURSOR;
return bReturn;
}
BOOL CALLBACK
C2GuestAccountDlgProc(
IN HWND hDlg, // window handle of the dialog box
IN UINT message, // type of message
IN WPARAM wParam,
IN LPARAM lParam
)
/*++
Routine Description:
Window procedure for Guest Account enable/disable
Arguments:
Standard DlgProc arguments
ReturnValue:
TRUE the message was handled by this routine
FALSE DefDialogProc should handle the message
--*/
{
static PULONG plNewState; // save address of caller's data
switch (message) {
case WM_INITDIALOG:
// save pointer
plNewState = (PULONG)lParam;
CheckDlgButton (hDlg, IDC_DISABLE_GUEST_ACCOUNT,
(*plNewState == GUEST_ACCT_DISABLED ? CHECKED : UNCHECKED));
SetFocus (GetDlgItem (hDlg, IDOK)); // set focus to OK Button
return FALSE; // we don't want Windows to set the focus
case WM_COMMAND:
switch (LOWORD(wParam)){
case IDOK:
if (HIWORD(wParam) == BN_CLICKED) {
if (IsDlgButtonChecked(hDlg, IDC_DISABLE_GUEST_ACCOUNT) == CHECKED) {
*plNewState = GUEST_ACCT_DISABLED;
} else {
*plNewState = GUEST_ACCT_ENABLED;
}
EndDialog (hDlg, (int)LOWORD(wParam));
return TRUE;
} else {
return FALSE;
}
case IDCANCEL:
if (HIWORD(wParam) == BN_CLICKED) {
// exit and return button that caused exit
EndDialog (hDlg, (int)LOWORD(wParam));
return TRUE;
} else {
return FALSE;
}
case IDC_C2:
if (HIWORD(wParam) == BN_CLICKED) {
CheckDlgButton (hDlg, IDC_DISABLE_GUEST_ACCOUNT,
CHECKED);
return TRUE;
} else {
return FALSE;
}
case IDC_HELP:
PostMessage (GetParent(hDlg), UM_SHOW_CONTEXT_HELP, 0, 0);
return TRUE;
default:
return FALSE;
}
default:
return (FALSE); // Didn't process the message
}
}
LONG
C2QueryGuestAccount (
IN LPARAM lParam
)
/*++
Routine Description:
Function called to find out the current state of this configuration
item. This function reads the current state of the item and
sets the C2 Compliance flag and the Status string to reflect
the current value of the configuration item.
Arguments:
Pointer to the Dll data block passed as an LPARAM.
ReturnValue:
ERROR_SUCCESS if the function succeeds otherwise a
WIN32 error is returned if an error occurs
--*/
{
PC2DLL_DATA pC2Data;
LONG lGuestAccount;
UINT nMsgId;
if (lParam != 0) {
pC2Data = (PC2DLL_DATA)lParam;
lGuestAccount = IsGuestAccountEnabled();
switch (lGuestAccount) {
case GUEST_ACCT_ENABLED:
pC2Data->lC2Compliance = C2DLL_NOT_SECURE;
nMsgId = IDS_GUEST_ACCOUNT_ENABLED;
break;
case GUEST_ACCT_DISABLED:
pC2Data->lC2Compliance = SECURE;
nMsgId = IDS_GUEST_ACCOUNT_DISABLED;
break;
case GUEST_ACCT_NOT_FOUND:
default:
pC2Data->lC2Compliance = SECURE;
nMsgId = IDS_GUEST_ACCOUNT_NOT_FOUND;
break;
}
lstrcpy (pC2Data->szStatusName,
GetStringResource (GetDllInstance(), nMsgId));
return ERROR_SUCCESS;
} else {
return ERROR_BAD_ARGUMENTS;
}
}
LONG
C2SetGuestAccount (
IN LPARAM lParam
)
/*++
Routine Description:
Function called to change the current state of this configuration
item based on an action code passed in the DLL data block. If
this function successfully sets the state of the configuration
item, then the C2 Compliance flag and the Status string to reflect
the new value of the configuration item.
Arguments:
Pointer to the Dll data block passed as an LPARAM.
ReturnValue:
ERROR_SUCCESS if the function succeeds otherwise a
WIN32 error is returned if an error occurs
--*/
{
PC2DLL_DATA pC2Data;
BOOL bGuestAccount = 0;
UINT nMsgId;
if (lParam != 0) {
pC2Data = (PC2DLL_DATA)lParam;
if (pC2Data->lActionCode == AC_GUEST_ACCT_UPDATE) {
if (EnableGuestAccount(
(pC2Data->lActionValue == GUEST_ACCT_ENABLED ? TRUE : FALSE))) {
switch (pC2Data->lActionValue) {
case GUEST_ACCT_ENABLED:
pC2Data->lC2Compliance = C2DLL_NOT_SECURE;
nMsgId = IDS_GUEST_ACCOUNT_ENABLED;
break;
case GUEST_ACCT_DISABLED:
pC2Data->lC2Compliance = SECURE;
nMsgId = IDS_GUEST_ACCOUNT_DISABLED;
break;
case GUEST_ACCT_NOT_FOUND:
default:
pC2Data->lC2Compliance = SECURE;
nMsgId = IDS_GUEST_ACCOUNT_NOT_FOUND;
break;
}
lstrcpy (pC2Data->szStatusName,
GetStringResource (GetDllInstance(), nMsgId));
}
pC2Data->lActionCode = 0;
pC2Data->lActionValue = 0;
}
return ERROR_SUCCESS;
} else {
return ERROR_BAD_ARGUMENTS;
}
}
LONG
C2DisplayGuestAccount (
IN LPARAM lParam
)
/*++
Routine Description:
Function called to display more information on the configuration
item and provide the user with the option to change the current
setting (if appropriate). If the User "OK's" out of the UI,
then the action code field in the DLL data block is set to the
appropriate (and configuration item-specific) action code so the
"Set" function can be called to perform the desired action. If
the user Cancels out of the UI, then the Action code field is
set to 0 (no action) and no action is performed.
Arguments:
Pointer to the Dll data block passed as an LPARAM.
ReturnValue:
ERROR_SUCCESS if the function succeeds otherwise a
WIN32 error is returned if an error occurs
--*/
{
PC2DLL_DATA pC2Data;
LONG lNewValue = 0;
if (lParam != 0) {
pC2Data = (PC2DLL_DATA)lParam;
lNewValue = IsGuestAccountEnabled();
if (lNewValue != GUEST_ACCT_NOT_FOUND) {
// the guest account was found on the system so
// show enable/disable dialog box
if (DialogBoxParam (
GetDllInstance(),
MAKEINTRESOURCE (IDD_GUEST_ACCOUNT),
pC2Data->hWnd,
C2GuestAccountDlgProc,
(LPARAM)&lNewValue) == IDOK) {
pC2Data->lActionValue = lNewValue;
pC2Data->lActionCode = AC_GUEST_ACCT_UPDATE;
} else {
// no action
pC2Data->lActionCode = AC_GUEST_ACCT_NOCHANGE;
}
} else {
// no guest account found on the system so show message box
DisplayDllMessageBox (
pC2Data->hWnd,
IDS_GUEST_ACCOUNT_NOT_FOUND,
IDS_GUEST_ACCOUNT_CAPTION,
MBOK_INFO);
pC2Data->lActionCode = AC_GUEST_ACCT_NOCHANGE;
}
} else {
return ERROR_BAD_ARGUMENTS;
}
return ERROR_SUCCESS;
}


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