77 lines
2.0 KiB
C#
77 lines
2.0 KiB
C#
using Microsoft.Win32.SafeHandles;
|
|
using System;
|
|
using System.Runtime.CompilerServices;
|
|
using System.Runtime.InteropServices;
|
|
using System.Security;
|
|
|
|
namespace GostCryptography.Native
|
|
{
|
|
/// <summary>
|
|
/// Дескриптор криптографического провайдера
|
|
/// </summary>
|
|
[SecurityCritical]
|
|
public sealed class SafeProvHandleImpl : SafeHandleZeroOrMinusOneIsInvalid
|
|
{
|
|
public static SafeProvHandleImpl InvalidHandle => new SafeProvHandleImpl(IntPtr.Zero);
|
|
|
|
public SafeProvHandleImpl() : base(true)
|
|
{
|
|
}
|
|
|
|
public SafeProvHandleImpl(IntPtr handle) : base(true)
|
|
{
|
|
SetHandle(handle);
|
|
}
|
|
|
|
public SafeProvHandleImpl(IntPtr handle, bool addref) : base(true)
|
|
{
|
|
if (!addref)
|
|
{
|
|
SetHandle(handle);
|
|
}
|
|
else
|
|
{
|
|
bool success;
|
|
int errorCode;
|
|
|
|
// Обеспечивает атомарность блока finally
|
|
RuntimeHelpers.PrepareConstrainedRegions();
|
|
|
|
try { }
|
|
finally
|
|
{
|
|
success = CryptoApi.CryptContextAddRef(handle, null, 0);
|
|
errorCode = Marshal.GetLastWin32Error();
|
|
|
|
if (success)
|
|
{
|
|
SetHandle(handle);
|
|
}
|
|
}
|
|
|
|
if (!success)
|
|
{
|
|
throw ExceptionUtility.CryptographicException(errorCode);
|
|
}
|
|
}
|
|
}
|
|
|
|
public bool DeleteOnClose { get; set; }
|
|
|
|
[SecurityCritical]
|
|
protected override bool ReleaseHandle()
|
|
{
|
|
if (DeleteOnClose)
|
|
{
|
|
CryptoApi.CryptSetProvParam2(handle, Constants.PP_DELETE_KEYSET, null, 0);
|
|
}
|
|
else
|
|
{
|
|
CryptoApi.CryptReleaseContext(handle, 0);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
}
|