Les permissions d’un share | Powershell Scripts

Dans cet article, nous avions exploré les fonctions de Netapi32.dll pour récupérer des informations relatives aux shares SMB.

Nous allons maintenant voir comment récupérer les permissions de ces shares.

Il existe des fonctions qui gèrent les SIDs, ACLs, et ACEs dans advapi32.dll, et nous allons capitaliser sur l’article concernant le Netapi pour en faire un tout, et lire les permissions sans passer par WMI.

Tout d’abord voici une nouvelle version du script netapi.ps1:

<#  
.SYNOPSIS  
    Defines functions in Netapi32.dll and advapi32.dll so they can be used within 
    Powershell to retrieve SMB share information.
.DESCRIPTION  
    Supported functions:
		Get-Shares <server> <level>
			server can be $null to point to localhost
			level can be 0 1 2 502 503
			Remark: Uses NetShareEnum
		
		Get-NetStatistics <server> <type>
			type can be SERVER or WORKSTATION
			Remark: Uses NetStatisticsGet

		Get-Sessions <server> <level> <user> <client>
			level can be 0 1 2 10 502
			Remark: Uses NetConnectionEnum

		Get-OpenFiles <server> <level> <user> <path>
			level can be 2 3
			Remark: Uses NetFileEnum

.EXAMPLE
	Get-NetStatistics localhost SERVER
	Get-Shares localhost 503
	Get-Sessions localhost 502
	Get-OpenFiles localhost 3
.NOTES  
	Filename	: Netapi.ps1
    Author     	: Micky Balladelli micky@balladelli.com  
.LINK  
    https://balladelli.com/netapi-et-powershell/ 
#> 
Add-Type -TypeDefinition @" 
using System; 
using System.Runtime.InteropServices;

public class Netapi 
{ 
	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SHARE_INFO_0
    {
		[MarshalAs(UnmanagedType.LPWStr)] public String Name;
    }

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SHARE_INFO_1
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
		public uint Type;
		[MarshalAs(UnmanagedType.LPWStr)] public string Remark;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SHARE_INFO_2
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
		public uint Type;
		[MarshalAs(UnmanagedType.LPWStr)] public string Remark;
		public uint Permissions;
		public uint MaxUses;
		public uint CurrentUses;
		[MarshalAs(UnmanagedType.LPWStr)] public string Path;
		[MarshalAs(UnmanagedType.LPWStr)] public string Password;
   }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SHARE_INFO_502
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
		public uint Type;
		[MarshalAs(UnmanagedType.LPWStr)] public string Remark;
		public uint Permissions;
		public uint MaxUses;
		public uint CurrentUses;
		[MarshalAs(UnmanagedType.LPWStr)] public string Path;
		[MarshalAs(UnmanagedType.LPWStr)] public string Password;		
		public uint Reserved;
		public IntPtr SecurityDescriptor;
    }
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SHARE_INFO_503
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
		public uint Type;
		[MarshalAs(UnmanagedType.LPWStr)] public string Remark;
		public uint Permissions;
		public uint MaxUses;
		public uint CurrentUses;
		[MarshalAs(UnmanagedType.LPWStr)] public string Path;
		[MarshalAs(UnmanagedType.LPWStr)] public string Password;		
		[MarshalAs(UnmanagedType.LPWStr)] public string ServerName;		
		public uint Reserved;
		public IntPtr SecurityDescriptor;
    }

	[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)] 
    public static extern uint NetShareEnum(
		[In,MarshalAs(UnmanagedType.LPWStr)] string server,
		int level,
		out IntPtr bufptr, 
		int prefmaxlen,
		ref Int32 entriesread, 
		ref Int32 totalentries, 
		ref Int32 resume_handle); 
	[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)] 
    public static extern int NetApiBufferFree(IntPtr buffer); 

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct STAT_SERVER_0
    {
	  public uint Start;
	  public uint FOpens;
	  public uint DevOpens;
	  public uint JobsQueued;
	  public uint SOpens;
	  public uint STimedOut;
	  public uint SerrorOut;
	  public uint PWerrors;
	  public uint PermErrors;
	  public uint SysRrrors;
	  public uint bytesSent_low;
	  public uint bytesSent_high;
	  public uint bytesRcvd_low;
	  public uint BytesRcvd_high;
	  public uint AvResponse;
	  public uint ReqNufNeed;
	  public uint BigBufNeed;
    }

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct STAT_WORKSTATION_0
    {
	  public long StatisticsStartTime;
	  public long BytesReceived;
	  public long SmbsReceived;
	  public long PagingReadBytesRequested;
	  public long NonPagingReadBytesRequested;
	  public long CacheReadBytesRequested;
	  public long NetworkReadBytesRequested;
	  public long BytesTransmitted;
	  public long SmbsTransmitted;
	  public long PagingWriteBytesRequested;
	  public long NonPagingWriteBytesRequested;
	  public long CacheWriteBytesRequested;
	  public long NetworkWriteBytesRequested;
	  public uint InitiallyFailedOperations;
	  public uint FailedCompletionOperations;
	  public uint ReadOperations;
	  public uint RandomReadOperations;
	  public uint ReadSmbs;
	  public uint LargeReadSmbs;
	  public uint SmallReadSmbs;
	  public uint WriteOperations;
	  public uint RandomWriteOperations;
	  public uint WriteSmbs;
	  public uint LargeWriteSmbs;
	  public uint SmallWriteSmbs;
	  public uint RawReadsDenied;
	  public uint RawWritesDenied;
	  public uint NetworkErrors;
	  public uint Sessions;
	  public uint FailedSessions;
	  public uint Reconnects;
	  public uint CoreConnects;
	  public uint Lanman20Connects;
	  public uint Lanman21Connects;
	  public uint LanmanNtConnects;
	  public uint ServerDisconnects;
	  public uint HungSessions;
	  public uint UseCount;
	  public uint FailedUseCount;
	  public uint CurrentCommands;
    }

	[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)] 
    public static extern uint NetStatisticsGet(
		[In,MarshalAs(UnmanagedType.LPWStr)] string server,
		[In,MarshalAs(UnmanagedType.LPWStr)] string service,
		int level,
		int options,
		out IntPtr bufptr); 

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SESSION_INFO_0
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
    }

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SESSION_INFO_1
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
		[MarshalAs(UnmanagedType.LPWStr)] public string Username;
		public uint NumOpens;
		public uint Time;
		public uint IdleTime;
		public uint UserFlags;
    }

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SESSION_INFO_2
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
		[MarshalAs(UnmanagedType.LPWStr)] public string Username;
		public uint NumOpens;
		public uint Time;
		public uint IdleTime;
		public uint UserFlags;
		[MarshalAs(UnmanagedType.LPWStr)] public string ConnectionType;
    }

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SESSION_INFO_10
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
		[MarshalAs(UnmanagedType.LPWStr)] public string Username;
		public uint Time;
		public uint IdleTime;
    }

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct SESSION_INFO_502
    {
		[MarshalAs(UnmanagedType.LPWStr)] public string Name;
		[MarshalAs(UnmanagedType.LPWStr)] public string Username;
		public uint NumOpens;
		public uint Time;
		public uint IdleTime;
		public uint UserFlags;
		[MarshalAs(UnmanagedType.LPWStr)] public string ConnectionType;
		[MarshalAs(UnmanagedType.LPWStr)] public string Transport;
    }

	[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)] 
    public static extern uint NetSessionEnum(
		[In,MarshalAs(UnmanagedType.LPWStr)] string server,
		[In,MarshalAs(UnmanagedType.LPWStr)] string client,
		[In,MarshalAs(UnmanagedType.LPWStr)] string user,
		int level,
		out IntPtr bufptr, 
		int prefmaxlen,
		ref Int32 entriesread, 
		ref Int32 totalentries, 
		ref Int32 resume_handle); 

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct FILE_INFO_2
    {
		public uint FileID;
    }
	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct FILE_INFO_3
    {
		public uint FileID;
		public uint Permissions;
		public uint NumLocks;
		[MarshalAs(UnmanagedType.LPWStr)] public string Path;
		[MarshalAs(UnmanagedType.LPWStr)] public string User;
    }

	[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)] 
    public static extern uint NetFileEnum(
		[In,MarshalAs(UnmanagedType.LPWStr)] string server,
		[In,MarshalAs(UnmanagedType.LPWStr)] string path,
		[In,MarshalAs(UnmanagedType.LPWStr)] string user,
		int level,
		out IntPtr bufptr, 
		int prefmaxlen,
		ref Int32 entriesread, 
		ref Int32 totalentries, 
		ref Int32 resume_handle); 
	[DllImport("advapi32.dll", CharSet = CharSet.Unicode)]
	public static extern bool GetSecurityDescriptorDacl(
		IntPtr pSecurityDescriptor,
		[MarshalAs(UnmanagedType.Bool)] out bool bDaclPresent,
		ref IntPtr pDacl,
		[MarshalAs(UnmanagedType.Bool)] out bool bDaclDefaulted
	);

    [DllImport("advapi32.dll", CharSet = CharSet.Unicode)]
    public static extern bool GetAclInformation(
		IntPtr pAcl,
		ref ACL_SIZE_INFORMATION pAclInformation,
		uint nAclInformationLength,
		ACL_INFORMATION_CLASS dwAclInformationClass
	);
 
    [DllImport("advapi32.dll", CharSet = CharSet.Unicode)]
    public static extern int GetAce(
		IntPtr aclPtr,
		int aceIndex,
		out IntPtr acePtr
	);

	[DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
    public static extern int GetLengthSid(
        IntPtr pSID
    );
	
	[DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool ConvertSidToStringSid(
        [MarshalAs(UnmanagedType.LPArray)] byte[] pSID,
        out IntPtr ptrSid
    );
	

	[StructLayout(LayoutKind.Sequential)]
	public struct ACL_SIZE_INFORMATION
	{
		public uint AceCount;
		public uint AclBytesInUse;
		public uint AclBytesFree;
	}

	[StructLayout(LayoutKind.Sequential)]
	public struct ACE_HEADER
	{
		public byte AceType;
		public byte AceFlags;
		public short AceSize;
	}

	[StructLayout(LayoutKind.Sequential)]
	public struct ACCESS_ALLOWED_ACE
	{
		public ACE_HEADER Header;
		public int Mask;
		public int SidStart;
	}

	public enum ACL_INFORMATION_CLASS
	{
		AclRevisionInformation = 1,
		AclSizeInformation
	}

}
"@ 

function Get-OpenFiles
{
	[CmdletBinding()]	
	param ( [Parameter(Position=0)][string]$server = "localhost", 
			[Parameter(Position=1)][int32]$level=3, 
			[Parameter(Position=2)][string]$user = $null, 
			[Parameter(Position=3)][string]$path = $null)
	switch ($level)
	{
		2   { $struct = New-Object netapi+FILE_INFO_2 }
		3   { $struct = New-Object netapi+FILE_INFO_3 }
		default
		{
			$level = 3
			$struct = New-Object netapi+FILE_INFO_3 
		}
	}
	$buffer = 0
	$entries = 0
	$total = 0
	$handle = 0
	$ret = [Netapi]::NetFileEnum($server, $path, $user, $level,
								  [ref]$buffer, -1,
								  [ref]$entries, [ref]$total,
								  [ref]$handle) 

	$files = @()
	if (!$ret)
	{
		$offset = $buffer.ToInt64()
		$increment = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$struct.GetType())

		for ($i = 0; $i -lt $entries; $i++)
		{
	        $ptr = New-Object system.Intptr -ArgumentList $offset
	        $files += [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$struct.GetType())

			$offset = $ptr.ToInt64()
	        $offset += $increment
		}
	}
	else
	{
		Write-Output ([ComponentModel.Win32Exception][Int32]$ret).Message

		if ($ret -eq 1208)
		{
			# Error Code labeled "Extended Error" requires the buffer to be freed
			[Void][Netapi]::NetApiBufferFree($buffer)
		}
	}
	$files
}
function Get-Sessions
{
	[CmdletBinding()]	
	param ( [Parameter(Position=0)][string]$server = "localhost", 
			[Parameter(Position=1)][int32]$level=0, 
			[Parameter(Position=2)][string]$client = $null, 
			[Parameter(Position=3)][string]$user = $null)
	switch ($level)
	{
		0   { $struct = New-Object netapi+SESSION_INFO_0 }
		1   { $struct = New-Object netapi+SESSION_INFO_1 }
		2   { $struct = New-Object netapi+SESSION_INFO_2 }
		10  { $struct = New-Object netapi+SESSION_INFO_10 }
		502 { $struct = New-Object netapi+SESSION_INFO_502 }
		
		default
		{
			$level = 0
			$struct = New-Object netapi+SESSION_INFO_0 
		}
	}

	$buffer = 0
	$entries = 0
	$total = 0
	$handle = 0
	$ret = [Netapi]::NetSessionEnum($server, $client, $user, $level,
								  [ref]$buffer, -1,
								  [ref]$entries, [ref]$total,
								  [ref]$handle) 

	$sessions = @()
	if (!$ret)
	{
		$offset = $buffer.ToInt64()
		$increment = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$struct.GetType())

		for ($i = 0; $i -lt $entries; $i++)
		{
	        $ptr = New-Object system.Intptr -ArgumentList $offset
	        $sessions += [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$struct.GetType())

			$offset = $ptr.ToInt64()
	        $offset += $increment
		}
	}
	else
	{
		Write-Output ([ComponentModel.Win32Exception][Int32]$ret).Message

		if ($ret -eq 1208)
		{
			# Error Code labeled "Extended Error" requires the buffer to be freed
			[Void][Netapi]::NetApiBufferFree($buffer)
		}
	}
	$sessions
}

function Get-Shares
{
	[CmdletBinding()]
	param ( [Parameter(Position=0)][string]$server = "localhost", 
			[Parameter(Position=1)][int32]$level=0)
	switch ($level)
	{
		0   { $struct = New-Object netapi+SHARE_INFO_0 }
		1   { $struct = New-Object netapi+SHARE_INFO_1 }
		2   { $struct = New-Object netapi+SHARE_INFO_2 }
		502 { $struct = New-Object netapi+SHARE_INFO_502 }
		503 { $struct = New-Object netapi+SHARE_INFO_503 }
		
		default
		{
			$level = 0
			$struct = New-Object netapi+SHARE_INFO_0 
		}
	}

	$buffer = 0
	$entries = 0
	$total = 0
	$handle = 0
	$ret = [Netapi]::NetShareEnum($server, $level,
								  [ref]$buffer, -1,
								  [ref]$entries, [ref]$total,
								  [ref]$handle) 

	$shares = @()
	if (!$ret)
	{
		$offset = $buffer.ToInt64()
		$increment = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$struct.GetType())

		for ($i = 0; $i -lt $entries; $i++)
		{
	        $ptr = New-Object system.Intptr -ArgumentList $offset
	        $shares += [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$struct.GetType())

			$offset = $ptr.ToInt64()
	        $offset += $increment
		}
	}
	else
	{
		Write-Output ([ComponentModel.Win32Exception][Int32]$ret).Message

		if ($ret -eq 1208)
		{
			# Error Code labeled "Extended Error" requires the buffer to be freed
			[Void][Netapi]::NetApiBufferFree($buffer)
		}
	}
	$shares
}
function Get-SharesPermissions
{
	[CmdletBinding()]
	param ( [Parameter(Position=0)][string]$server = "localhost")
	
	$shares = Get-Shares -level 502 -server $server
}
function Get-NetStatistics
{
	[CmdletBinding()]
	param ( [Parameter(Position=0)][string]$server = "localhost", 
			[Parameter(Position=1)][string]$type="WORKSTATION")

	if ($type -eq "SERVER")
	{
		$struct = New-Object netapi+STAT_SERVER_0 
		$service = "LanmanServer"
	}
	else
	{
		$struct = New-Object netapi+STAT_WORKSTATION_0 
		$service = "LanmanWorkstation"
	}

	$buffer = 0
	$ret = [Netapi]::NetStatisticsGet($server,
									  $service,
									  0, # only level 0 is supported for now
									  0, #must be 0
								  	  [ref]$buffer)

	if (!$ret)
	{
	    $ret = [system.runtime.interopservices.marshal]::PtrToStructure($buffer, [System.Type]$struct.GetType())
		$ret
	}
	else
	{
		Write-Output ([ComponentModel.Win32Exception][Int32]$ret).Message
	}

}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

.SYNOPSIS

Defines functions in Netapi32.dll and advapi32.dll so they can be used within

Powershell to retrieve SMB share information.

.DESCRIPTION

Supported functions:

Get-Shares <server> <level>

server can be $null to point to localhost

level can be 0 1 2 502 503

Remark: Uses NetShareEnum

Get-NetStatistics <server> <type>

type can be SERVER or WORKSTATION

Remark: Uses NetStatisticsGet

Get-Sessions <server> <level> <user> <client>

level can be 0 1 2 10 502

Remark: Uses NetConnectionEnum

Get-OpenFiles <server> <level> <user> <path>

level can be 2 3

Remark: Uses NetFileEnum

.EXAMPLE

Get-NetStatistics localhost SERVER

Get-Shares localhost 503

Get-Sessions localhost 502

Get-OpenFiles localhost 3

.NOTES

Filename : Netapi.ps1

Author : Micky Balladelli micky@balladelli.com

.LINK

https://balladelli.com/netapi-et-powershell/

Add-Type -TypeDefinition @"

using System;

using System.Runtime.InteropServices;

public class Netapi

{

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SHARE_INFO_0

{

[MarshalAs(UnmanagedType.LPWStr)] public String Name;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SHARE_INFO_1

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

public uint Type;

[MarshalAs(UnmanagedType.LPWStr)] public string Remark;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SHARE_INFO_2

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

public uint Type;

[MarshalAs(UnmanagedType.LPWStr)] public string Remark;

public uint Permissions;

public uint MaxUses;

public uint CurrentUses;

[MarshalAs(UnmanagedType.LPWStr)] public string Path;

[MarshalAs(UnmanagedType.LPWStr)] public string Password;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SHARE_INFO_502

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

public uint Type;

[MarshalAs(UnmanagedType.LPWStr)] public string Remark;

public uint Permissions;

public uint MaxUses;

public uint CurrentUses;

[MarshalAs(UnmanagedType.LPWStr)] public string Path;

[MarshalAs(UnmanagedType.LPWStr)] public string Password;

public uint Reserved;

public IntPtr SecurityDescriptor;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SHARE_INFO_503

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

public uint Type;

[MarshalAs(UnmanagedType.LPWStr)] public string Remark;

public uint Permissions;

public uint MaxUses;

public uint CurrentUses;

[MarshalAs(UnmanagedType.LPWStr)] public string Path;

[MarshalAs(UnmanagedType.LPWStr)] public string Password;

[MarshalAs(UnmanagedType.LPWStr)] public string ServerName;

public uint Reserved;

public IntPtr SecurityDescriptor;

}

[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)]

public static extern uint NetShareEnum(

[In,MarshalAs(UnmanagedType.LPWStr)] string server,

int level,

out IntPtr bufptr,

int prefmaxlen,

ref Int32 entriesread,

ref Int32 totalentries,

ref Int32 resume_handle);

[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)]

public static extern int NetApiBufferFree(IntPtr buffer);

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct STAT_SERVER_0

{

public uint Start;

public uint FOpens;

public uint DevOpens;

public uint JobsQueued;

public uint SOpens;

public uint STimedOut;

public uint SerrorOut;

public uint PWerrors;

public uint PermErrors;

public uint SysRrrors;

public uint bytesSent_low;

public uint bytesSent_high;

public uint bytesRcvd_low;

public uint BytesRcvd_high;

public uint AvResponse;

public uint ReqNufNeed;

public uint BigBufNeed;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct STAT_WORKSTATION_0

{

public long StatisticsStartTime;

public long BytesReceived;

public long SmbsReceived;

public long PagingReadBytesRequested;

public long NonPagingReadBytesRequested;

public long CacheReadBytesRequested;

public long NetworkReadBytesRequested;

public long BytesTransmitted;

public long SmbsTransmitted;

public long PagingWriteBytesRequested;

public long NonPagingWriteBytesRequested;

public long CacheWriteBytesRequested;

public long NetworkWriteBytesRequested;

public uint InitiallyFailedOperations;

public uint FailedCompletionOperations;

public uint ReadOperations;

public uint RandomReadOperations;

public uint ReadSmbs;

public uint LargeReadSmbs;

public uint SmallReadSmbs;

public uint WriteOperations;

public uint RandomWriteOperations;

public uint WriteSmbs;

public uint LargeWriteSmbs;

public uint SmallWriteSmbs;

public uint RawReadsDenied;

public uint RawWritesDenied;

public uint NetworkErrors;

public uint Sessions;

public uint FailedSessions;

public uint Reconnects;

public uint CoreConnects;

public uint Lanman20Connects;

public uint Lanman21Connects;

public uint LanmanNtConnects;

public uint ServerDisconnects;

public uint HungSessions;

public uint UseCount;

public uint FailedUseCount;

public uint CurrentCommands;

}

[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)]

public static extern uint NetStatisticsGet(

[In,MarshalAs(UnmanagedType.LPWStr)] string server,

[In,MarshalAs(UnmanagedType.LPWStr)] string service,

int level,

int options,

out IntPtr bufptr);

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SESSION_INFO_0

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SESSION_INFO_1

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

[MarshalAs(UnmanagedType.LPWStr)] public string Username;

public uint NumOpens;

public uint Time;

public uint IdleTime;

public uint UserFlags;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SESSION_INFO_2

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

[MarshalAs(UnmanagedType.LPWStr)] public string Username;

public uint NumOpens;

public uint Time;

public uint IdleTime;

public uint UserFlags;

[MarshalAs(UnmanagedType.LPWStr)] public string ConnectionType;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SESSION_INFO_10

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

[MarshalAs(UnmanagedType.LPWStr)] public string Username;

public uint Time;

public uint IdleTime;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct SESSION_INFO_502

{

[MarshalAs(UnmanagedType.LPWStr)] public string Name;

[MarshalAs(UnmanagedType.LPWStr)] public string Username;

public uint NumOpens;

public uint Time;

public uint IdleTime;

public uint UserFlags;

[MarshalAs(UnmanagedType.LPWStr)] public string ConnectionType;

[MarshalAs(UnmanagedType.LPWStr)] public string Transport;

}

[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)]

public static extern uint NetSessionEnum(

[In,MarshalAs(UnmanagedType.LPWStr)] string server,

[In,MarshalAs(UnmanagedType.LPWStr)] string client,

[In,MarshalAs(UnmanagedType.LPWStr)] string user,

int level,

out IntPtr bufptr,

int prefmaxlen,

ref Int32 entriesread,

ref Int32 totalentries,

ref Int32 resume_handle);

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct FILE_INFO_2

{

public uint FileID;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

public struct FILE_INFO_3

{

public uint FileID;

public uint Permissions;

public uint NumLocks;

[MarshalAs(UnmanagedType.LPWStr)] public string Path;

[MarshalAs(UnmanagedType.LPWStr)] public string User;

}

[DllImport("Netapi32.dll",CharSet=CharSet.Unicode)]

public static extern uint NetFileEnum(

[In,MarshalAs(UnmanagedType.LPWStr)] string server,

[In,MarshalAs(UnmanagedType.LPWStr)] string path,

[In,MarshalAs(UnmanagedType.LPWStr)] string user,

int level,

out IntPtr bufptr,

int prefmaxlen,

ref Int32 entriesread,

ref Int32 totalentries,

ref Int32 resume_handle);

[DllImport("advapi32.dll", CharSet = CharSet.Unicode)]

public static extern bool GetSecurityDescriptorDacl(

IntPtr pSecurityDescriptor,

[MarshalAs(UnmanagedType.Bool)] out bool bDaclPresent,

ref IntPtr pDacl,

[MarshalAs(UnmanagedType.Bool)] out bool bDaclDefaulted

);

[DllImport("advapi32.dll", CharSet = CharSet.Unicode)]

public static extern bool GetAclInformation(

IntPtr pAcl,

ref ACL_SIZE_INFORMATION pAclInformation,

uint nAclInformationLength,

ACL_INFORMATION_CLASS dwAclInformationClass

);

[DllImport("advapi32.dll", CharSet = CharSet.Unicode)]

public static extern int GetAce(

IntPtr aclPtr,

int aceIndex,

out IntPtr acePtr

);

[DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

public static extern int GetLengthSid(

IntPtr pSID

);

[DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

[return: MarshalAs(UnmanagedType.Bool)]

public static extern bool ConvertSidToStringSid(

[MarshalAs(UnmanagedType.LPArray)] byte[] pSID,

out IntPtr ptrSid

);

[StructLayout(LayoutKind.Sequential)]

public struct ACL_SIZE_INFORMATION

{

public uint AceCount;

public uint AclBytesInUse;

public uint AclBytesFree;

}

[StructLayout(LayoutKind.Sequential)]

public struct ACE_HEADER

{

public byte AceType;

public byte AceFlags;

public short AceSize;

}

[StructLayout(LayoutKind.Sequential)]

public struct ACCESS_ALLOWED_ACE

{

public ACE_HEADER Header;

public int Mask;

public int SidStart;

}

public enum ACL_INFORMATION_CLASS

{

AclRevisionInformation = 1,

AclSizeInformation

}

function Get-OpenFiles

{

[CmdletBinding()]

param ( [Parameter(Position=0)][string]$server = "localhost",

[Parameter(Position=1)][int32]$level=3,

[Parameter(Position=2)][string]$user = $null,

[Parameter(Position=3)][string]$path = $null)

switch ($level)

{

2 { $struct = New-Object netapi+FILE_INFO_2 }

3 { $struct = New-Object netapi+FILE_INFO_3 }

default

{

$level = 3

$struct = New-Object netapi+FILE_INFO_3

}

$buffer = 0

$entries = 0

$total = 0

$handle = 0

$ret = [Netapi]::NetFileEnum($server, $path, $user, $level,

[ref]$buffer, -1,

[ref]$entries, [ref]$total,

[ref]$handle)

$files = @()

if (!$ret)

{

$offset = $buffer.ToInt64()

$increment = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$struct.GetType())

for ($i = 0; $i -lt $entries; $i++)

{

$ptr = New-Object system.Intptr -ArgumentList $offset

$files += [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$struct.GetType())

$offset = $ptr.ToInt64()

$offset += $increment

}

else

{

Write-Output ([ComponentModel.Win32Exception][Int32]$ret).Message

if ($ret -eq 1208)

{

# Error Code labeled "Extended Error" requires the buffer to be freed

[Void][Netapi]::NetApiBufferFree($buffer)

}

$files

}

function Get-Sessions

{

[CmdletBinding()]

param ( [Parameter(Position=0)][string]$server = "localhost",

[Parameter(Position=1)][int32]$level=0,

[Parameter(Position=2)][string]$client = $null,

[Parameter(Position=3)][string]$user = $null)

switch ($level)

{

0 { $struct = New-Object netapi+SESSION_INFO_0 }

1 { $struct = New-Object netapi+SESSION_INFO_1 }

2 { $struct = New-Object netapi+SESSION_INFO_2 }

10 { $struct = New-Object netapi+SESSION_INFO_10 }

502 { $struct = New-Object netapi+SESSION_INFO_502 }

default

{

$level = 0

$struct = New-Object netapi+SESSION_INFO_0

}

$buffer = 0

$entries = 0

$total = 0

$handle = 0

$ret = [Netapi]::NetSessionEnum($server, $client, $user, $level,

[ref]$buffer, -1,

[ref]$entries, [ref]$total,

[ref]$handle)

$sessions = @()

if (!$ret)

{

$offset = $buffer.ToInt64()

$increment = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$struct.GetType())

for ($i = 0; $i -lt $entries; $i++)

{

$ptr = New-Object system.Intptr -ArgumentList $offset

$sessions += [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$struct.GetType())

$offset = $ptr.ToInt64()

$offset += $increment

}

else

{

Write-Output ([ComponentModel.Win32Exception][Int32]$ret).Message

if ($ret -eq 1208)

{

# Error Code labeled "Extended Error" requires the buffer to be freed

[Void][Netapi]::NetApiBufferFree($buffer)

}

$sessions

}

function Get-Shares

{

[CmdletBinding()]

param ( [Parameter(Position=0)][string]$server = "localhost",

[Parameter(Position=1)][int32]$level=0)

switch ($level)

{

0 { $struct = New-Object netapi+SHARE_INFO_0 }

1 { $struct = New-Object netapi+SHARE_INFO_1 }

2 { $struct = New-Object netapi+SHARE_INFO_2 }

502 { $struct = New-Object netapi+SHARE_INFO_502 }

503 { $struct = New-Object netapi+SHARE_INFO_503 }

default

{

$level = 0

$struct = New-Object netapi+SHARE_INFO_0

}

$buffer = 0

$entries = 0

$total = 0

$handle = 0

$ret = [Netapi]::NetShareEnum($server, $level,

[ref]$buffer, -1,

[ref]$entries, [ref]$total,

[ref]$handle)

$shares = @()

if (!$ret)

{

$offset = $buffer.ToInt64()

$increment = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$struct.GetType())

for ($i = 0; $i -lt $entries; $i++)

{

$ptr = New-Object system.Intptr -ArgumentList $offset

$shares += [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$struct.GetType())

$offset = $ptr.ToInt64()

$offset += $increment

}

else

{

Write-Output ([ComponentModel.Win32Exception][Int32]$ret).Message

if ($ret -eq 1208)

{

# Error Code labeled "Extended Error" requires the buffer to be freed

[Void][Netapi]::NetApiBufferFree($buffer)

}

$shares

}

function Get-SharesPermissions

{

[CmdletBinding()]

param ( [Parameter(Position=0)][string]$server = "localhost")

$shares = Get-Shares -level 502 -server $server

}

function Get-NetStatistics

{

[CmdletBinding()]

param ( [Parameter(Position=0)][string]$server = "localhost",

[Parameter(Position=1)][string]$type="WORKSTATION")

if ($type -eq "SERVER")

{

$struct = New-Object netapi+STAT_SERVER_0

$service = "LanmanServer"

}

else

{

$struct = New-Object netapi+STAT_WORKSTATION_0

$service = "LanmanWorkstation"

}

$buffer = 0

$ret = [Netapi]::NetStatisticsGet($server,

$service,

0, # only level 0 is supported for now

0, #must be 0

[ref]$buffer)

if (!$ret)

{

$ret = [system.runtime.interopservices.marshal]::PtrToStructure($buffer, [System.Type]$struct.GetType())

$ret

}

else

{

Write-Output ([ComponentModel.Win32Exception][Int32]$ret).Message

}

Il faudra avec cette version dot-sourcer le script pour que les cmdlets soient définies:

. $PSScriptRoot\netapi.ps1

1	. $PSScriptRoot\netapi.ps1

Une fois les cmdlets définies nous allons avoir besoin de celle qui récupère le level 502 des shares:

$shares = Get-Shares -level 502 -server localhost

1	$shares = Get-Shares -level 502 -server localhost

et avec cet array, nous allons pour chaque élément vérifier si le SecurityDescriptor est présent. Pour ensuite récupérer l’ACL dans un buffer en mémoire.

A partir de l’ACL nous pouvons récupérer l’ACE qui contient le SID et la permission.

Avec un peu de gymnastique de pointeurs et buffers de structures, nous allons pouvoir traduire tout cela en objets Powershell qui peuvent être utilisés.

Voici le script complet:

. $PSScriptRoot\netapi.ps1
$shares = Get-Shares -level 502 -server localhost

foreach ($share in $shares)
{
	$aclPresent = 0
	$acl = 0
	$aclDefaulted = 0
	
	if ($share.SecurityDescriptor -ne 0)
	{
		$ret = [Netapi]::GetSecurityDescriptorDacl($share.SecurityDescriptor,[ref]$aclPresent,[ref]$acl,[ref]$aclDefaulted)

		if ($aclPresent -eq $true)
		{		
			$aclInfo = New-Object netapi+ACL_SIZE_INFORMATION
			$length = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$aclInfo.GetType())
			$AclSizeInformation = 2 # Enum defined in ACL_INFORMATION_CLASS
			
			$ret = [Netapi]::GetAclInformation($acl,[ref]$aclInfo,$length,$AclSizeInformation)
		
			for($i = 0; $i -lt $aclInfo.AceCount; $i++)
			{
				$ptr = 0
				$aceStruct = New-Object netapi+ACCESS_ALLOWED_ACE
				$ret = [netapi]::GetAce($acl, $i, [ref]$ptr);
				$ace = [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$aceStruct.GetType())
				
				if ($null -ne $ace)
				{
					$increment = [System.Runtime.Interopservices.Marshal]::OffsetOf([System.Type]$aceStruct.GetType(),"SidStart")
					$offset = $ptr.ToInt64()
			        $offset += $increment
					$sidSize = [Netapi]::GetLengthSid($offset)

					$bytes= $encryptedBytes = New-Object byte[] $sidSize
					
					[System.Runtime.Interopservices.Marshal]::Copy($offset, $bytes, 0, $sidSize)
					$ptrSid = 0
					$ret = [Netapi]::ConvertSidToStringSid($bytes, [ref]$ptrSid)
					$sid = [System.Runtime.Interopservices.Marshal]::PtrToStringAuto($ptrSid)
					$objSID = New-Object System.Security.Principal.SecurityIdentifier($sid) 
					$objUser = $objSID.Translate( [System.Security.Principal.NTAccount]) 
		
					if (($ace.Mask -band 0x1F01FF) -eq 0x1F01FF)
					{
						$right = "Full Control"
					}
					elseif (($ace.Mask -band 0x1301BF) -eq 0x1301BF)
					{
						$right = "Modify"
					}
					elseif (($ace.Mask -band 0x1200A9) -eq 0x1200A9)
					{
						$right = "Read"
					}
			
					Write-Output "$($share.Name), SID $($objUser.Value) $right"

				}
			}
		}
	}
}

. $PSScriptRoot\netapi.ps1

$shares = Get-Shares -level 502 -server localhost

foreach ($share in $shares)

{

$aclPresent = 0

$acl = 0

$aclDefaulted = 0

if ($share.SecurityDescriptor -ne 0)

{

$ret = [Netapi]::GetSecurityDescriptorDacl($share.SecurityDescriptor,[ref]$aclPresent,[ref]$acl,[ref]$aclDefaulted)

if ($aclPresent -eq $true)

{

$aclInfo = New-Object netapi+ACL_SIZE_INFORMATION

$length = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$aclInfo.GetType())

$AclSizeInformation = 2 # Enum defined in ACL_INFORMATION_CLASS

$ret = [Netapi]::GetAclInformation($acl,[ref]$aclInfo,$length,$AclSizeInformation)

for($i = 0; $i -lt $aclInfo.AceCount; $i++)

{

$ptr = 0

$aceStruct = New-Object netapi+ACCESS_ALLOWED_ACE

$ret = [netapi]::GetAce($acl, $i, [ref]$ptr);

$ace = [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$aceStruct.GetType())

if ($null -ne $ace)

{

$increment = [System.Runtime.Interopservices.Marshal]::OffsetOf([System.Type]$aceStruct.GetType(),"SidStart")

$offset = $ptr.ToInt64()

$offset += $increment

$sidSize = [Netapi]::GetLengthSid($offset)

$bytes= $encryptedBytes = New-Object byte[] $sidSize

[System.Runtime.Interopservices.Marshal]::Copy($offset, $bytes, 0, $sidSize)

$ptrSid = 0

$ret = [Netapi]::ConvertSidToStringSid($bytes, [ref]$ptrSid)

$sid = [System.Runtime.Interopservices.Marshal]::PtrToStringAuto($ptrSid)

$objSID = New-Object System.Security.Principal.SecurityIdentifier($sid)

$objUser = $objSID.Translate( [System.Security.Principal.NTAccount])

if (($ace.Mask -band 0x1F01FF) -eq 0x1F01FF)

{

$right = "Full Control"

}

elseif (($ace.Mask -band 0x1301BF) -eq 0x1301BF)

{

$right = "Modify"

}

elseif (($ace.Mask -band 0x1200A9) -eq 0x1200A9)

{

$right = "Read"

}

Write-Output "$($share.Name), SID $($objUser.Value) $right"

}

L’output est simple mais peut être adapté:

TEMP, SID BUILTIN\Administrators Full Control
TEMP, SID Everyone Full Control
TEMP2, SID Everyone Full Control

TEMP, SID BUILTIN\Administrators Full Control

TEMP, SID Everyone Full Control

TEMP2, SID Everyone Full Control

Sans les ~~mains~~ WMI.

Voici l’article de référence en C# qui traite de ce sujet http://blogs.msdn.com/b/dsadsi/archive/2012/03/30/to-read-shared-permissions-of-a-server-resource-in-c-using-netsharegetinfo.aspx

Voici un mise à jour du script d’exemple, cette nouvelle version traite le problème de l’exception « Some or all identity references could not be translated. ».

Pour régler ce problème nous allons récupérer la liste des utilisateurs locaux d’une machine donnée et comparer les SIDs sans passer par Translate.

                    try
                    {
    			$objUser = $objSID.Translate( [System.Security.Principal.NTAccount]) 
                        $name = $objUser.Value
                    }
                    catch
                    {
                        $adsi = [adsi]"WinNT://$server" 
                        $users = $adsi.Children | where {$_.SchemaClassName -eq 'user'} 
                        $name = $users | % {
                            $localSID = New-Object System.Security.Principal.SecurityIdentifier($_.objectSid.Value,0)
                            if ($localSID -eq $sid)
                            {
                                $_.name
                            }
                        }
                    }

try

{

$objUser = $objSID.Translate( [System.Security.Principal.NTAccount])

$name = $objUser.Value

}

catch

{

$adsi = [adsi]"WinNT://$server"

$users = $adsi.Children | where {$_.SchemaClassName -eq 'user'}

$name = $users | % {

$localSID = New-Object System.Security.Principal.SecurityIdentifier($_.objectSid.Value,0)

if ($localSID -eq $sid)

{

$_.name

}

Voici le script en entier (renseigner $server en début du script):

. $PSScriptRoot\netapi.ps1

$server = ""
$shares = Get-Shares -level 502 -server $server

foreach ($share in $shares)
{
	$aclPresent = 0
	$acl = 0
	$aclDefaulted = 0
	
	if ($share.SecurityDescriptor -ne 0)
	{
		$ret = [Netapi]::GetSecurityDescriptorDacl($share.SecurityDescriptor,[ref]$aclPresent,[ref]$acl,[ref]$aclDefaulted)

		if ($aclPresent -eq $true)
		{		
			$aclInfo = New-Object netapi+ACL_SIZE_INFORMATION
			$length = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$aclInfo.GetType())
			$AclSizeInformation = 2 # Enum defined in ACL_INFORMATION_CLASS
			
			$ret = [Netapi]::GetAclInformation($acl,[ref]$aclInfo,$length,$AclSizeInformation)
		
			for($i = 0; $i -lt $aclInfo.AceCount; $i++)
			{
				$ptr = 0
				$aceStruct = New-Object netapi+ACCESS_ALLOWED_ACE
				$ret = [netapi]::GetAce($acl, $i, [ref]$ptr);
				$ace = [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$aceStruct.GetType())
				
				if ($null -ne $ace)
				{
					$increment = [System.Runtime.Interopservices.Marshal]::OffsetOf([System.Type]$aceStruct.GetType(),"SidStart")
					$offset = $ptr.ToInt64()
			        $offset += $increment
					$sidSize = [Netapi]::GetLengthSid($offset)

					$bytes= New-Object byte[] $sidSize
					
					[System.Runtime.Interopservices.Marshal]::Copy($offset, $bytes, 0, $sidSize)
					$ptrSid = 0
					$ret = [Netapi]::ConvertSidToStringSid($bytes, [ref]$ptrSid)
					$sid = [System.Runtime.Interopservices.Marshal]::PtrToStringAuto($ptrSid)
					$objSID = New-Object System.Security.Principal.SecurityIdentifier($sid) 
                    try
                    {
    			$objUser = $objSID.Translate( [System.Security.Principal.NTAccount]) 
                        $name = $objUser.Value
                    }
                    catch
                    {
                        $adsi = [adsi]"WinNT://$server" 
                        $users = $adsi.Children | where {$_.SchemaClassName -eq 'user'} 
                        $name = $users | % {
                            $localSID = New-Object System.Security.Principal.SecurityIdentifier($_.objectSid.Value,0)
                            if ($localSID -eq $sid)
                            {
                                $_.name
                            }
                        }
                    }

		
					if (($ace.Mask -band 0x1F01FF) -eq 0x1F01FF)
					{
						$right = "Full Control"
					}
					elseif (($ace.Mask -band 0x1301BF) -eq 0x1301BF)
					{
						$right = "Modify"
					}
					elseif (($ace.Mask -band 0x1200A9) -eq 0x1200A9)
					{
						$right = "Read"
					}
			
					Write-Output "$($share.Name), SID $name $right"

				}
			}
		}
	}
}

. $PSScriptRoot\netapi.ps1

$server = ""

$shares = Get-Shares -level 502 -server $server

foreach ($share in $shares)

{

$aclPresent = 0

$acl = 0

$aclDefaulted = 0

if ($share.SecurityDescriptor -ne 0)

{

$ret = [Netapi]::GetSecurityDescriptorDacl($share.SecurityDescriptor,[ref]$aclPresent,[ref]$acl,[ref]$aclDefaulted)

if ($aclPresent -eq $true)

{

$aclInfo = New-Object netapi+ACL_SIZE_INFORMATION

$length = [System.Runtime.Interopservices.Marshal]::SizeOf([System.Type]$aclInfo.GetType())

$AclSizeInformation = 2 # Enum defined in ACL_INFORMATION_CLASS

$ret = [Netapi]::GetAclInformation($acl,[ref]$aclInfo,$length,$AclSizeInformation)

for($i = 0; $i -lt $aclInfo.AceCount; $i++)

{

$ptr = 0

$aceStruct = New-Object netapi+ACCESS_ALLOWED_ACE

$ret = [netapi]::GetAce($acl, $i, [ref]$ptr);

$ace = [system.runtime.interopservices.marshal]::PtrToStructure($ptr, [System.Type]$aceStruct.GetType())

if ($null -ne $ace)

{

$increment = [System.Runtime.Interopservices.Marshal]::OffsetOf([System.Type]$aceStruct.GetType(),"SidStart")

$offset = $ptr.ToInt64()

$offset += $increment

$sidSize = [Netapi]::GetLengthSid($offset)

$bytes= New-Object byte[] $sidSize

[System.Runtime.Interopservices.Marshal]::Copy($offset, $bytes, 0, $sidSize)

$ptrSid = 0

$ret = [Netapi]::ConvertSidToStringSid($bytes, [ref]$ptrSid)

$sid = [System.Runtime.Interopservices.Marshal]::PtrToStringAuto($ptrSid)

$objSID = New-Object System.Security.Principal.SecurityIdentifier($sid)

try

{

$objUser = $objSID.Translate( [System.Security.Principal.NTAccount])

$name = $objUser.Value

}

catch

{

$adsi = [adsi]"WinNT://$server"

$users = $adsi.Children | where {$_.SchemaClassName -eq 'user'}

$name = $users | % {

$localSID = New-Object System.Security.Principal.SecurityIdentifier($_.objectSid.Value,0)

if ($localSID -eq $sid)

{

$_.name

}

if (($ace.Mask -band 0x1F01FF) -eq 0x1F01FF)

{

$right = "Full Control"

}

elseif (($ace.Mask -band 0x1301BF) -eq 0x1301BF)

{

$right = "Modify"

}

elseif (($ace.Mask -band 0x1200A9) -eq 0x1200A9)

{

$right = "Read"

}

Write-Output "$($share.Name), SID $name $right"

}