Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / clr / src / ManagedLibraries / Security / System / Security / Cryptography / DataProtection.cs / 1 / DataProtection.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
//
// DataProtection.cs
//
// 01/25/2003
//
namespace System.Security.Cryptography
{
using Microsoft.Win32;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.ConstrainedExecution;
using System.Security.Permissions;
using System.Globalization;
public enum DataProtectionScope {
CurrentUser = 0x00,
LocalMachine = 0x01
}
public enum MemoryProtectionScope {
SameProcess = 0x00,
CrossProcess = 0x01,
SameLogon = 0x02
}
[System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
public sealed class ProtectedData {
private ProtectedData () {}
public static byte[] Protect (byte[] userData,
byte[] optionalEntropy,
DataProtectionScope scope) {
if (userData == null)
throw new ArgumentNullException("userData");
if (Environment.OSVersion.Platform == PlatformID.Win32Windows)
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
GCHandle pbDataIn = new GCHandle();
GCHandle pOptionalEntropy = new GCHandle();
CAPI.CRYPTOAPI_BLOB blob = new CAPI.CRYPTOAPI_BLOB();
RuntimeHelpers.PrepareConstrainedRegions();
try {
pbDataIn = GCHandle.Alloc(userData, GCHandleType.Pinned);
CAPI.CRYPTOAPI_BLOB dataIn = new CAPI.CRYPTOAPI_BLOB();
dataIn.cbData = (uint) userData.Length;
dataIn.pbData = pbDataIn.AddrOfPinnedObject();
CAPI.CRYPTOAPI_BLOB entropy = new CAPI.CRYPTOAPI_BLOB();
if (optionalEntropy != null) {
pOptionalEntropy = GCHandle.Alloc(optionalEntropy, GCHandleType.Pinned);
entropy.cbData = (uint) optionalEntropy.Length;
entropy.pbData = pOptionalEntropy.AddrOfPinnedObject();
}
uint dwFlags = CAPI.CRYPTPROTECT_UI_FORBIDDEN;
if (scope == DataProtectionScope.LocalMachine)
dwFlags |= CAPI.CRYPTPROTECT_LOCAL_MACHINE;
unsafe {
if (!CAPI.CryptProtectData(new IntPtr(&dataIn),
String.Empty,
new IntPtr(&entropy),
IntPtr.Zero,
IntPtr.Zero,
dwFlags,
new IntPtr(&blob)))
throw new CryptographicException(Marshal.GetLastWin32Error());
}
// In some cases, the API would fail due to OOM but simply return a null pointer.
if (blob.pbData == IntPtr.Zero)
throw new OutOfMemoryException();
byte[] encryptedData = new byte[(int) blob.cbData];
Marshal.Copy(blob.pbData, encryptedData, 0, encryptedData.Length);
return encryptedData;
}
catch (EntryPointNotFoundException) {
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
}
finally {
if (pbDataIn.IsAllocated)
pbDataIn.Free();
if (pOptionalEntropy.IsAllocated)
pOptionalEntropy.Free();
if (blob.pbData != IntPtr.Zero) {
CAPI.ZeroMemory(blob.pbData, blob.cbData);
CAPI.LocalFree(blob.pbData);
}
}
}
public static byte[] Unprotect (byte[] encryptedData,
byte[] optionalEntropy,
DataProtectionScope scope) {
if (encryptedData == null)
throw new ArgumentNullException("encryptedData");
if (Environment.OSVersion.Platform == PlatformID.Win32Windows)
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
GCHandle pbDataIn = new GCHandle();
GCHandle pOptionalEntropy = new GCHandle();
CAPI.CRYPTOAPI_BLOB userData = new CAPI.CRYPTOAPI_BLOB();
RuntimeHelpers.PrepareConstrainedRegions();
try {
pbDataIn = GCHandle.Alloc(encryptedData, GCHandleType.Pinned);
CAPI.CRYPTOAPI_BLOB dataIn = new CAPI.CRYPTOAPI_BLOB();
dataIn.cbData = (uint) encryptedData.Length;
dataIn.pbData = pbDataIn.AddrOfPinnedObject();
CAPI.CRYPTOAPI_BLOB entropy = new CAPI.CRYPTOAPI_BLOB();
if (optionalEntropy != null) {
pOptionalEntropy = GCHandle.Alloc(optionalEntropy, GCHandleType.Pinned);
entropy.cbData = (uint) optionalEntropy.Length;
entropy.pbData = pOptionalEntropy.AddrOfPinnedObject();
}
uint dwFlags = CAPI.CRYPTPROTECT_UI_FORBIDDEN;
if (scope == DataProtectionScope.LocalMachine)
dwFlags |= CAPI.CRYPTPROTECT_LOCAL_MACHINE;
unsafe {
if (!CAPI.CryptUnprotectData(new IntPtr(&dataIn),
IntPtr.Zero,
new IntPtr(&entropy),
IntPtr.Zero,
IntPtr.Zero,
dwFlags,
new IntPtr(&userData)))
throw new CryptographicException(Marshal.GetLastWin32Error());
}
// In some cases, the API would fail due to OOM but simply return a null pointer.
if (userData.pbData == IntPtr.Zero)
throw new OutOfMemoryException();
byte[] data = new byte[(int) userData.cbData];
Marshal.Copy(userData.pbData, data, 0, data.Length);
return data;
}
catch (EntryPointNotFoundException) {
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
}
finally {
if (pbDataIn.IsAllocated)
pbDataIn.Free();
if (pOptionalEntropy.IsAllocated)
pOptionalEntropy.Free();
if (userData.pbData != IntPtr.Zero) {
CAPI.ZeroMemory(userData.pbData, userData.cbData);
CAPI.LocalFree(userData.pbData);
}
}
}
}
[System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
public sealed class ProtectedMemory {
private ProtectedMemory () {}
public static void Protect (byte[] userData,
MemoryProtectionScope scope) {
if (userData == null)
throw new ArgumentNullException("userData");
if (Environment.OSVersion.Platform == PlatformID.Win32Windows)
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
VerifyScope(scope);
// The RtlEncryptMemory and RtlDecryptMemory functions are available on WinXP and publicly published
// in the ntsecapi.h header file as of Windows Server 2003.
// The Rtl functions accept data in 8 byte increments, but we don't want applications to be able to make use of this,
// or else they're liable to break when the user upgrades.
if ((userData.Length == 0) || (userData.Length % CAPI.CRYPTPROTECTMEMORY_BLOCK_SIZE != 0))
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_DpApi_InvalidMemoryLength"));
uint dwFlags = (uint) scope;
try {
// RtlEncryptMemory return an NTSTATUS
int status = CAPI.SystemFunction040(userData,
(uint) userData.Length,
dwFlags);
if (status < 0) // non-negative numbers indicate success
throw new CryptographicException(CAPI.LsaNtStatusToWinError(status));
}
catch (EntryPointNotFoundException) {
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
}
}
public static void Unprotect (byte[] encryptedData,
MemoryProtectionScope scope) {
if (encryptedData == null)
throw new ArgumentNullException("encryptedData");
if (Environment.OSVersion.Platform == PlatformID.Win32Windows)
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
VerifyScope(scope);
// The RtlEncryptMemory and RtlDecryptMemory functions are available on WinXP and publicly published
// in the ntsecapi.h header file as of Windows Server 2003.
// The Rtl functions accept data in 8 byte increments, but we don't want applications to be able to make use of this,
// or else they're liable to break when the user upgrades.
if ((encryptedData.Length == 0) || (encryptedData.Length % CAPI.CRYPTPROTECTMEMORY_BLOCK_SIZE != 0))
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_DpApi_InvalidMemoryLength"));
uint dwFlags = (uint) scope;
try {
// RtlDecryptMemory return an NTSTATUS
int status = CAPI.SystemFunction041(encryptedData,
(uint) encryptedData.Length,
dwFlags);
if (status < 0) // non-negative numbers indicate success
throw new CryptographicException(CAPI.LsaNtStatusToWinError(status));
}
catch (EntryPointNotFoundException) {
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
}
}
private static void VerifyScope (MemoryProtectionScope scope) {
if ((scope != MemoryProtectionScope.SameProcess) && (scope != MemoryProtectionScope.CrossProcess) &&
(scope != MemoryProtectionScope.SameLogon))
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Arg_EnumIllegalVal"), (int) scope));
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
//
// DataProtection.cs
//
// 01/25/2003
//
namespace System.Security.Cryptography
{
using Microsoft.Win32;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.ConstrainedExecution;
using System.Security.Permissions;
using System.Globalization;
public enum DataProtectionScope {
CurrentUser = 0x00,
LocalMachine = 0x01
}
public enum MemoryProtectionScope {
SameProcess = 0x00,
CrossProcess = 0x01,
SameLogon = 0x02
}
[System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
public sealed class ProtectedData {
private ProtectedData () {}
public static byte[] Protect (byte[] userData,
byte[] optionalEntropy,
DataProtectionScope scope) {
if (userData == null)
throw new ArgumentNullException("userData");
if (Environment.OSVersion.Platform == PlatformID.Win32Windows)
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
GCHandle pbDataIn = new GCHandle();
GCHandle pOptionalEntropy = new GCHandle();
CAPI.CRYPTOAPI_BLOB blob = new CAPI.CRYPTOAPI_BLOB();
RuntimeHelpers.PrepareConstrainedRegions();
try {
pbDataIn = GCHandle.Alloc(userData, GCHandleType.Pinned);
CAPI.CRYPTOAPI_BLOB dataIn = new CAPI.CRYPTOAPI_BLOB();
dataIn.cbData = (uint) userData.Length;
dataIn.pbData = pbDataIn.AddrOfPinnedObject();
CAPI.CRYPTOAPI_BLOB entropy = new CAPI.CRYPTOAPI_BLOB();
if (optionalEntropy != null) {
pOptionalEntropy = GCHandle.Alloc(optionalEntropy, GCHandleType.Pinned);
entropy.cbData = (uint) optionalEntropy.Length;
entropy.pbData = pOptionalEntropy.AddrOfPinnedObject();
}
uint dwFlags = CAPI.CRYPTPROTECT_UI_FORBIDDEN;
if (scope == DataProtectionScope.LocalMachine)
dwFlags |= CAPI.CRYPTPROTECT_LOCAL_MACHINE;
unsafe {
if (!CAPI.CryptProtectData(new IntPtr(&dataIn),
String.Empty,
new IntPtr(&entropy),
IntPtr.Zero,
IntPtr.Zero,
dwFlags,
new IntPtr(&blob)))
throw new CryptographicException(Marshal.GetLastWin32Error());
}
// In some cases, the API would fail due to OOM but simply return a null pointer.
if (blob.pbData == IntPtr.Zero)
throw new OutOfMemoryException();
byte[] encryptedData = new byte[(int) blob.cbData];
Marshal.Copy(blob.pbData, encryptedData, 0, encryptedData.Length);
return encryptedData;
}
catch (EntryPointNotFoundException) {
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
}
finally {
if (pbDataIn.IsAllocated)
pbDataIn.Free();
if (pOptionalEntropy.IsAllocated)
pOptionalEntropy.Free();
if (blob.pbData != IntPtr.Zero) {
CAPI.ZeroMemory(blob.pbData, blob.cbData);
CAPI.LocalFree(blob.pbData);
}
}
}
public static byte[] Unprotect (byte[] encryptedData,
byte[] optionalEntropy,
DataProtectionScope scope) {
if (encryptedData == null)
throw new ArgumentNullException("encryptedData");
if (Environment.OSVersion.Platform == PlatformID.Win32Windows)
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
GCHandle pbDataIn = new GCHandle();
GCHandle pOptionalEntropy = new GCHandle();
CAPI.CRYPTOAPI_BLOB userData = new CAPI.CRYPTOAPI_BLOB();
RuntimeHelpers.PrepareConstrainedRegions();
try {
pbDataIn = GCHandle.Alloc(encryptedData, GCHandleType.Pinned);
CAPI.CRYPTOAPI_BLOB dataIn = new CAPI.CRYPTOAPI_BLOB();
dataIn.cbData = (uint) encryptedData.Length;
dataIn.pbData = pbDataIn.AddrOfPinnedObject();
CAPI.CRYPTOAPI_BLOB entropy = new CAPI.CRYPTOAPI_BLOB();
if (optionalEntropy != null) {
pOptionalEntropy = GCHandle.Alloc(optionalEntropy, GCHandleType.Pinned);
entropy.cbData = (uint) optionalEntropy.Length;
entropy.pbData = pOptionalEntropy.AddrOfPinnedObject();
}
uint dwFlags = CAPI.CRYPTPROTECT_UI_FORBIDDEN;
if (scope == DataProtectionScope.LocalMachine)
dwFlags |= CAPI.CRYPTPROTECT_LOCAL_MACHINE;
unsafe {
if (!CAPI.CryptUnprotectData(new IntPtr(&dataIn),
IntPtr.Zero,
new IntPtr(&entropy),
IntPtr.Zero,
IntPtr.Zero,
dwFlags,
new IntPtr(&userData)))
throw new CryptographicException(Marshal.GetLastWin32Error());
}
// In some cases, the API would fail due to OOM but simply return a null pointer.
if (userData.pbData == IntPtr.Zero)
throw new OutOfMemoryException();
byte[] data = new byte[(int) userData.cbData];
Marshal.Copy(userData.pbData, data, 0, data.Length);
return data;
}
catch (EntryPointNotFoundException) {
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
}
finally {
if (pbDataIn.IsAllocated)
pbDataIn.Free();
if (pOptionalEntropy.IsAllocated)
pOptionalEntropy.Free();
if (userData.pbData != IntPtr.Zero) {
CAPI.ZeroMemory(userData.pbData, userData.cbData);
CAPI.LocalFree(userData.pbData);
}
}
}
}
[System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
public sealed class ProtectedMemory {
private ProtectedMemory () {}
public static void Protect (byte[] userData,
MemoryProtectionScope scope) {
if (userData == null)
throw new ArgumentNullException("userData");
if (Environment.OSVersion.Platform == PlatformID.Win32Windows)
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
VerifyScope(scope);
// The RtlEncryptMemory and RtlDecryptMemory functions are available on WinXP and publicly published
// in the ntsecapi.h header file as of Windows Server 2003.
// The Rtl functions accept data in 8 byte increments, but we don't want applications to be able to make use of this,
// or else they're liable to break when the user upgrades.
if ((userData.Length == 0) || (userData.Length % CAPI.CRYPTPROTECTMEMORY_BLOCK_SIZE != 0))
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_DpApi_InvalidMemoryLength"));
uint dwFlags = (uint) scope;
try {
// RtlEncryptMemory return an NTSTATUS
int status = CAPI.SystemFunction040(userData,
(uint) userData.Length,
dwFlags);
if (status < 0) // non-negative numbers indicate success
throw new CryptographicException(CAPI.LsaNtStatusToWinError(status));
}
catch (EntryPointNotFoundException) {
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
}
}
public static void Unprotect (byte[] encryptedData,
MemoryProtectionScope scope) {
if (encryptedData == null)
throw new ArgumentNullException("encryptedData");
if (Environment.OSVersion.Platform == PlatformID.Win32Windows)
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
VerifyScope(scope);
// The RtlEncryptMemory and RtlDecryptMemory functions are available on WinXP and publicly published
// in the ntsecapi.h header file as of Windows Server 2003.
// The Rtl functions accept data in 8 byte increments, but we don't want applications to be able to make use of this,
// or else they're liable to break when the user upgrades.
if ((encryptedData.Length == 0) || (encryptedData.Length % CAPI.CRYPTPROTECTMEMORY_BLOCK_SIZE != 0))
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_DpApi_InvalidMemoryLength"));
uint dwFlags = (uint) scope;
try {
// RtlDecryptMemory return an NTSTATUS
int status = CAPI.SystemFunction041(encryptedData,
(uint) encryptedData.Length,
dwFlags);
if (status < 0) // non-negative numbers indicate success
throw new CryptographicException(CAPI.LsaNtStatusToWinError(status));
}
catch (EntryPointNotFoundException) {
throw new NotSupportedException(SecurityResources.GetResourceString("NotSupported_PlatformRequiresNT"));
}
}
private static void VerifyScope (MemoryProtectionScope scope) {
if ((scope != MemoryProtectionScope.SameProcess) && (scope != MemoryProtectionScope.CrossProcess) &&
(scope != MemoryProtectionScope.SameLogon))
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Arg_EnumIllegalVal"), (int) scope));
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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