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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.IdentityModel
{
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Runtime.ConstrainedExecution;
using System.Security.Cryptography;
using System.ServiceModel.Diagnostics;
using Microsoft.Win32.SafeHandles;
class SafeProvHandle : SafeHandleZeroOrMinusOneIsInvalid
{
SafeProvHandle() : base(true) { }
// 0 is an Invalid Handle
SafeProvHandle(IntPtr handle)
: base(true)
{
DiagnosticUtility.DebugAssert(handle == IntPtr.Zero, "SafeProvHandle constructor can only be called with IntPtr.Zero.");
SetHandle(handle);
}
internal static SafeProvHandle InvalidHandle
{
get { return new SafeProvHandle(IntPtr.Zero); }
}
protected override bool ReleaseHandle()
{
// PreSharp Bug: Call 'Marshal.GetLastWin32Error' or 'Marshal.GetHRForLastWin32Error' before any other interop call.
#pragma warning suppress 56523 // We are not interested in throwing an exception here if CloseHandle fails.
return NativeMethods.CryptReleaseContext(handle, 0);
}
}
class SafeKeyHandle : SafeHandleZeroOrMinusOneIsInvalid
{
SafeProvHandle provHandle = null;
SafeKeyHandle() : base(true) { }
// 0 is an Invalid Handle
SafeKeyHandle(IntPtr handle)
: base(true)
{
DiagnosticUtility.DebugAssert(handle == IntPtr.Zero, "SafeKeyHandle constructor can only be called with IntPtr.Zero.");
SetHandle(handle);
}
internal static SafeKeyHandle InvalidHandle
{
get { return new SafeKeyHandle(IntPtr.Zero); }
}
protected override bool ReleaseHandle()
{
// PreSharp Bug: Call 'Marshal.GetLastWin32Error' or 'Marshal.GetHRForLastWin32Error' before any other interop call.
#pragma warning suppress 56523 // We are not interested in throwing an exception here if CloseHandle fails.
bool ret = NativeMethods.CryptDestroyKey(handle);
if (this.provHandle != null)
{
this.provHandle.DangerousRelease();
this.provHandle = null;
}
return ret;
}
internal static unsafe SafeKeyHandle SafeCryptImportKey(SafeProvHandle provHandle, void* pbDataPtr, int cbData)
{
bool b = false;
int err = 0;
SafeKeyHandle keyHandle = null;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
provHandle.DangerousAddRef(ref b);
}
catch (Exception e)
{
if (System.Runtime.Fx.IsFatal(e))
throw;
if (b)
{
provHandle.DangerousRelease();
b = false;
}
if (!(e is ObjectDisposedException))
throw;
}
finally
{
if (b)
{
b = NativeMethods.CryptImportKey(provHandle, pbDataPtr, (uint)cbData, IntPtr.Zero, 0, out keyHandle);
if (!b)
{
err = Marshal.GetLastWin32Error();
provHandle.DangerousRelease();
}
else
{
// Take ownership of AddRef. Will Release at Close.
keyHandle.provHandle = provHandle;
}
}
}
if (!b)
{
Utility.CloseInvalidOutSafeHandle(keyHandle);
string reason = (err != 0) ? new Win32Exception(err).Message : String.Empty;
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new CryptographicException(SR.GetString(SR.AESCryptImportKeyFailed, reason)));
}
return keyHandle;
}
}
}
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