107 lines
3.6 KiB
C#
107 lines
3.6 KiB
C#
// Copyright (c) Microsoft Open Technologies, Inc.
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// All Rights Reserved
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
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// WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF
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// TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR
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// NON-INFRINGEMENT.
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// See the Apache 2 License for the specific language governing
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// permissions and limitations under the License.
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// -----------------------------------------------------------------------
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// <copyright file="SafeFreeContextBufferChannelBinding.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// -----------------------------------------------------------------------
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using System;
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using System.Runtime.CompilerServices;
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using System.Runtime.ConstrainedExecution;
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using System.Security;
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using System.Security.Authentication.ExtendedProtection;
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namespace Microsoft.AspNet.Security.Windows
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{
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[SuppressUnmanagedCodeSecurity]
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internal sealed class SafeFreeContextBufferChannelBinding : ChannelBinding
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{
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private int size;
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public override int Size
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{
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get { return size; }
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}
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[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
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internal unsafe void Set(IntPtr value)
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{
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this.handle = value;
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}
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internal static SafeFreeContextBufferChannelBinding CreateEmptyHandle()
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{
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return new SafeFreeContextBufferChannelBinding();
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}
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public static unsafe int QueryContextChannelBinding(SafeDeleteContext phContext, ContextAttribute contextAttribute, Bindings* buffer,
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SafeFreeContextBufferChannelBinding refHandle)
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{
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int status = (int)SecurityStatus.InvalidHandle;
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bool b = false;
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// We don't want to be interrupted by thread abort exceptions or unexpected out-of-memory errors failing to jit
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// one of the following methods. So run within a CER non-interruptible block.
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RuntimeHelpers.PrepareConstrainedRegions();
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try
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{
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phContext.DangerousAddRef(ref b);
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}
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catch (Exception e)
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{
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if (b)
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{
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phContext.DangerousRelease();
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b = false;
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}
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if (!(e is ObjectDisposedException))
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{
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throw;
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}
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}
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finally
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{
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if (b)
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{
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status = UnsafeNclNativeMethods.SafeNetHandles.QueryContextAttributesW(ref phContext._handle, contextAttribute, buffer);
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phContext.DangerousRelease();
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}
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if (status == 0 && refHandle != null)
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{
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refHandle.Set((*buffer).pBindings);
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refHandle.size = (*buffer).BindingsLength;
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}
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if (status != 0 && refHandle != null)
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{
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refHandle.SetHandleAsInvalid();
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}
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}
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return status;
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}
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protected override bool ReleaseHandle()
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{
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return UnsafeNclNativeMethods.SafeNetHandles.FreeContextBuffer(handle) == 0;
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}
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}
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}
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