windows-nt/Source/XPSP1/NT/base/pnp/tools/pnpreg/pnpreg.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 1998 Microsoft Corporation
Module Name:
pnpreg.c
Abstract:
The module contains the the initialization code for the executive
component. It also contains the display string and shutdown system
services.
Author:
Robert B. Nelson (robertn) 10-Feb-1998
Revision History:
--*/
#include <windows.h>
#include <aclapi.h>
#include <regstr.h>
#include <stdio.h>
#include <malloc.h>
#include <tchar.h>
PSID g_pAdminSid;
PSID g_pSystemSid;
SECURITY_DESCRIPTOR g_DeviceParametersSD;
PACL g_pDeviceParametersDacl;
SECURITY_DESCRIPTOR g_LockedPrivateKeysSD;
PACL g_pLockedPrivateKeysDacl;
#if DBG || UMODETEST
#define DBGF_ERRORS 0x00000001
#define DBGF_WARNINGS 0x00000002
#define DBGF_REGISTRY 0x00000010
void RegFixDebugMessage(LPTSTR format, ...);
#define DBGTRACE(l, x) (g_RegFixDebugFlag & (l) ? RegFixDebugMessage x : (void)0)
DWORD g_RegFixDebugFlag = DBGF_WARNINGS | DBGF_ERRORS;
TCHAR g_szCurrentKeyName[4096];
DWORD g_dwCurrentKeyNameLength = 0;
#else
#define DBGTRACE(l, x)
#endif
VOID
FreeSecurityDescriptors(
VOID
)
/*++
Routine Description:
This function deallocates the data structures allocated and initialized by
CreateDeviceParametersSD.
Arguments:
None.
Return Value:
None.
--*/
{
if (g_pDeviceParametersDacl) {
LocalFree(g_pDeviceParametersDacl);
g_pDeviceParametersDacl = NULL;
}
if (g_pLockedPrivateKeysDacl) {
LocalFree(g_pLockedPrivateKeysDacl);
g_pLockedPrivateKeysDacl = NULL;
}
if (g_pAdminSid != NULL) {
FreeSid(g_pAdminSid);
g_pAdminSid = NULL;
}
if (g_pSystemSid != NULL) {
FreeSid(g_pSystemSid);
g_pSystemSid = NULL;
}
}
BOOL
CreateSecurityDescriptors(
VOID
)
/*++
Routine Description:
This function creates a properly initialized Security Descriptor for the
Device Parameters key and its subkeys. The SIDs and DACL created by this
routine must be freed by calling FreeDeviceParametersSD.
Arguments:
None.
Return Value:
Pointer to the initialized Security Descriptor. NULL is returned if an
error occurs.
--*/
{
SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
EXPLICIT_ACCESS ExplicitAccess[2];
DWORD dwError;
BOOL bSuccess;
DWORD i;
//
// Create SIDs - Admins and System
//
bSuccess = AllocateAndInitializeSid( &NtAuthority,
2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0, 0, 0, 0, 0, 0,
&g_pAdminSid);
bSuccess = bSuccess && AllocateAndInitializeSid( &NtAuthority,
1,
SECURITY_LOCAL_SYSTEM_RID,
0, 0, 0, 0, 0, 0, 0,
&g_pSystemSid);
if (bSuccess) {
//
// Initialize Access structures describing the ACEs we want:
// System Full Control
// Admins Full Control
//
// We'll take advantage of the fact that the unlocked private keys is
// the same as the device parameters key and they are a superset of the
// locked private keys.
//
// When we create the DACL for the private key we'll specify a subset of
// the ExplicitAccess array.
//
for (i = 0; i < 2; i++) {
ExplicitAccess[i].grfAccessMode = SET_ACCESS;
ExplicitAccess[i].grfInheritance = CONTAINER_INHERIT_ACE;
ExplicitAccess[i].Trustee.pMultipleTrustee = NULL;
ExplicitAccess[i].Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
ExplicitAccess[i].Trustee.TrusteeForm = TRUSTEE_IS_SID;
ExplicitAccess[i].Trustee.TrusteeType = TRUSTEE_IS_GROUP;
}
ExplicitAccess[0].grfAccessPermissions = KEY_ALL_ACCESS;
ExplicitAccess[0].Trustee.ptstrName = (LPTSTR)g_pSystemSid;
ExplicitAccess[1].grfAccessPermissions = KEY_ALL_ACCESS;
ExplicitAccess[1].Trustee.ptstrName = (LPTSTR)g_pAdminSid;
//
// Create the DACL with the both the above ACEs for the DeviceParameters
//
dwError = SetEntriesInAcl( 2,
ExplicitAccess,
NULL,
&g_pDeviceParametersDacl );
if (dwError == ERROR_SUCCESS)
{
//
// Create the DACL with just the system ACE for the locked private
// keys.
//
dwError = SetEntriesInAcl( 1,
ExplicitAccess,
NULL,
&g_pLockedPrivateKeysDacl );
}
bSuccess = dwError == ERROR_SUCCESS;
}
//
// Initialize the DeviceParameters security descriptor
//
bSuccess = bSuccess && InitializeSecurityDescriptor( &g_DeviceParametersSD,
SECURITY_DESCRIPTOR_REVISION );
//
// Set the new DACL in the security descriptor
//
bSuccess = bSuccess && SetSecurityDescriptorDacl( &g_DeviceParametersSD,
TRUE,
g_pDeviceParametersDacl,
FALSE);
//
// validate the new security descriptor
//
bSuccess = bSuccess && IsValidSecurityDescriptor( &g_DeviceParametersSD );
//
// Initialize the DeviceParameters security descriptor
//
bSuccess = bSuccess && InitializeSecurityDescriptor( &g_LockedPrivateKeysSD,
SECURITY_DESCRIPTOR_REVISION );
//
// Set the new DACL in the security descriptor
//
bSuccess = bSuccess && SetSecurityDescriptorDacl( &g_LockedPrivateKeysSD,
TRUE,
g_pLockedPrivateKeysDacl,
FALSE);
//
// validate the new security descriptor
//
bSuccess = bSuccess && IsValidSecurityDescriptor( &g_LockedPrivateKeysSD );
if (!bSuccess) {
FreeSecurityDescriptors();
}
return bSuccess;
}
VOID
EnumKeysAndApplyDacls(
IN HKEY hParentKey,
IN LPTSTR pszKeyName,
IN DWORD dwLevel,
IN BOOL bInDeviceParameters,
IN BOOL bApplyTopDown,
IN PSECURITY_DESCRIPTOR pPrivateKeySD,
IN PSECURITY_DESCRIPTOR pDeviceParametersSD
)
/*++
Routine Description:
This function applies the DACL in pSD to all the keys rooted at hKey
including hKey itself.
Arguments:
hParentKey Handle to a registry key.
pszKeyName Name of the key.
dwLevel Number of levels remaining to recurse.
pSD Pointer to a security descriptor containing a DACL.
Return Value:
None.
--*/
{
LONG RegStatus;
DWORD dwMaxSubKeySize;
LPTSTR pszSubKey;
DWORD index;
HKEY hKey;
BOOL bNewInDeviceParameters;
#if DBG || UMODETEST
DWORD dwStartKeyNameLength = g_dwCurrentKeyNameLength;
if (g_dwCurrentKeyNameLength != 0) {
g_szCurrentKeyName[ g_dwCurrentKeyNameLength++ ] = TEXT('\\');
}
_tcscpy(&g_szCurrentKeyName[g_dwCurrentKeyNameLength], pszKeyName);
g_dwCurrentKeyNameLength += _tcslen(pszKeyName);
#endif
DBGTRACE( DBGF_REGISTRY,
(TEXT("EnumKeysAndApplyDacls(0x%08X, \"%s\", %d, %s, %s, 0x%08X, 0x%08X)\n"),
hParentKey,
g_szCurrentKeyName,
dwLevel,
bInDeviceParameters ? TEXT("TRUE") : TEXT("FALSE"),
bApplyTopDown ? TEXT("TRUE") : TEXT("FALSE"),
pPrivateKeySD,
pDeviceParametersSD) );
if (bApplyTopDown) {
RegStatus = RegOpenKeyEx( hParentKey,
pszKeyName,
0,
WRITE_DAC,
&hKey
);
if (RegStatus != ERROR_SUCCESS) {
DBGTRACE( DBGF_ERRORS,
(TEXT("EnumKeysAndApplyDacls(\"%s\") RegOpenKeyEx() failed, error = %d\n"),
g_szCurrentKeyName, RegStatus));
return;
}
DBGTRACE( DBGF_REGISTRY,
(TEXT("Setting security on %s on the way down\n"),
g_szCurrentKeyName) );
//
// apply the new security to the registry key
//
RegStatus = RegSetKeySecurity( hKey,
DACL_SECURITY_INFORMATION,
bInDeviceParameters ?
pDeviceParametersSD :
pPrivateKeySD
);
if (RegStatus != ERROR_SUCCESS) {
DBGTRACE( DBGF_ERRORS,
(TEXT("EnumKeysAndApplyDacls(\"%s\") RegSetKeySecurity() failed, error = %d\n"),
g_szCurrentKeyName, RegStatus));
}
//
// Close the key and reopen it later for read (which hopefully was just
// granted in the DACL we just wrote
//
RegCloseKey( hKey );
}
RegStatus = RegOpenKeyEx( hParentKey,
pszKeyName,
0,
KEY_READ | WRITE_DAC,
&hKey
);
if (RegStatus != ERROR_SUCCESS) {
DBGTRACE( DBGF_ERRORS,
(TEXT("EnumKeysAndApplyDacls(\"%s\") RegOpenKeyEx() failed, error = %d\n"),
g_szCurrentKeyName, RegStatus));
return;
}
//
// Determine length of longest subkey
//
RegStatus = RegQueryInfoKey( hKey,
NULL,
NULL,
NULL,
NULL,
&dwMaxSubKeySize,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL );
if (RegStatus == ERROR_SUCCESS) {
//
// Allocate a buffer to hold the subkey names. RegQueryInfoKey returns the
// size in characters and doesn't include the NUL terminator.
//
pszSubKey = LocalAlloc(0, ++dwMaxSubKeySize * sizeof(TCHAR));
if (pszSubKey != NULL) {
//
// Enumerate all the subkeys and then call ourselves recursively for each
// until dwLevel reaches 0.
//
for (index = 0; ; index++) {
RegStatus = RegEnumKey( hKey,
index,
pszSubKey,
dwMaxSubKeySize
);
if (RegStatus != ERROR_SUCCESS) {
if (RegStatus != ERROR_NO_MORE_ITEMS) {
DBGTRACE( DBGF_ERRORS,
(TEXT("EnumKeysAndApplyDacls(\"%s\") RegEnumKeyEx() failed, error = %d\n"),
g_szCurrentKeyName,
RegStatus) );
}
break;
}
bNewInDeviceParameters = bInDeviceParameters ||
(dwLevel == 3 &&
_tcsicmp( pszSubKey,
REGSTR_KEY_DEVICEPARAMETERS ) == 0);
EnumKeysAndApplyDacls( hKey,
pszSubKey,
dwLevel + 1,
bNewInDeviceParameters,
bApplyTopDown,
pPrivateKeySD,
pDeviceParametersSD
);
}
LocalFree( pszSubKey );
}
}
else
{
DBGTRACE( DBGF_ERRORS,
(TEXT("EnumKeysAndApplyDacls(\"%s\") RegQueryInfoKey() failed, error = %d\n"),
g_szCurrentKeyName, RegStatus));
}
if (!bApplyTopDown) {
DBGTRACE( DBGF_REGISTRY,
(TEXT("Setting security on %s on the way back up\n"),
g_szCurrentKeyName) );
//
// apply the new security to the registry key
//
RegStatus = RegSetKeySecurity( hKey,
DACL_SECURITY_INFORMATION,
bInDeviceParameters ?
pDeviceParametersSD :
pPrivateKeySD
);
if (RegStatus != ERROR_SUCCESS) {
DBGTRACE( DBGF_ERRORS,
(TEXT("EnumKeysAndApplyDacls(\"%s\") RegSetKeySecurity() failed, error = %d\n"),
g_szCurrentKeyName, RegStatus));
}
}
RegCloseKey( hKey );
#if DBG || UMODETEST
g_dwCurrentKeyNameLength = dwStartKeyNameLength;
g_szCurrentKeyName[g_dwCurrentKeyNameLength] = TEXT('\0');
#endif
}
VOID
LockUnlockEnumTree(
LPTSTR pszMachineName,
BOOL bLock
)
{
PSECURITY_DESCRIPTOR pSD;
HKEY hParentKey;
LONG RegStatus;
if (pszMachineName != NULL) {
RegStatus = RegConnectRegistry( pszMachineName,
HKEY_LOCAL_MACHINE,
&hParentKey );
if (RegStatus != ERROR_SUCCESS) {
DBGTRACE( DBGF_ERRORS,
(TEXT("Could not connect to remote registry on %s, status = %d\n"),
pszMachineName,
RegStatus) );
}
} else {
hParentKey = HKEY_LOCAL_MACHINE;
}
if (CreateSecurityDescriptors()) {
EnumKeysAndApplyDacls( hParentKey,
REGSTR_PATH_SYSTEMENUM,
0,
FALSE,
!bLock,
bLock ? &g_LockedPrivateKeysSD : &g_DeviceParametersSD,
&g_DeviceParametersSD
);
FreeSecurityDescriptors();
}
}
#if DBG || UMODETEST
void
RegFixDebugMessage(LPWSTR format, ...)
{
va_list args;
va_start(args, format);
_vtprintf(format, args);
}
#endif
#if UMODETEST
void
usage(int argc, TCHAR **argv)
{
PTCHAR pszProgram;
if ((pszProgram = _tcsrchr(argv[0], TEXT('\\'))) != NULL) {
pszProgram++;
} else {
pszProgram = argv[0];
}
_tprintf(TEXT("%s: Lock or Unlock PnP Registry (Enum key)\n\n"), pszProgram);
_tprintf(TEXT("Usage: %s [-m <machine>] -l | -u\n"), pszProgram);
_tprintf(TEXT(" -m <machine> Remote machine without leading \\\\\n"));
_tprintf(TEXT(" -l Locks Enum key\n"));
_tprintf(TEXT(" -u Unlocks Enum key\n\n"));
_tprintf(TEXT("Note: -m is optional. Only one of -l or -u may be used.\n"));
}
int __cdecl
_tmain(int argc, TCHAR **argv)
{
LPTSTR pszMachineName = NULL;
LPTSTR pszArg;
int idxArg;
if ( argc == 1 )
{
usage(argc, argv);
return 0;
}
for (idxArg = 1; idxArg < argc; idxArg++)
{
pszArg = argv[ idxArg ];
if (*pszArg == '/' || *pszArg == '-')
{
pszArg++;
while (pszArg != NULL && *pszArg != '\0') {
switch (*pszArg)
{
case '/': // Ignore these, caused by cmds like /m/l
pszArg++;
break;
case 'l':
case 'L':
pszArg++;
LockUnlockEnumTree( pszMachineName, TRUE );
break;
case 'm':
case 'M':
pszArg++;
if (*pszArg == ':' || *pszArg == '=')
{
if (pszArg[ 1 ] != '\0')
{
pszMachineName = ++pszArg;
}
}
else if (*pszArg != '\0')
{
pszMachineName = pszArg;
}
else if ((idxArg + 1) < argc && (argv[ idxArg + 1 ][0] != '/' && argv[ idxArg + 1 ][0] != '-'))
{
pszMachineName = argv[ ++idxArg ];
}
if (pszMachineName == NULL)
{
_tprintf(
TEXT("%c%c : missing machine name argument\n"),
argv[ idxArg ][ 0 ], pszArg [ - 1 ]
);
usage(argc, argv);
return 1;
}
pszArg = NULL;
break;
case 'u':
case 'U':
pszArg++;
LockUnlockEnumTree( pszMachineName, FALSE );
break;
case 'v':
case 'V':
pszArg++;
g_RegFixDebugFlag |= DBGF_REGISTRY;
break;
default:
_tprintf(
TEXT("%c%c : invalid option\n"),
argv[ idxArg ][ 0 ], *pszArg
);
break;
}
}
}
}
return 0;
}
#endif