mcs/class/referencesource/System.Web/Util/TlsTokenBindingHandle.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="TlsTokenBindingHandle.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //------------------------------------------------------------------------------
   6
   7 namespace System.Web.Util {
   8     using System;
   9     using System.Diagnostics.CodeAnalysis;
  10     using System.Runtime.CompilerServices;
  11     using System.Runtime.InteropServices;
  12     using System.Web.Hosting;
  13
  14     internal sealed class TlsTokenBindingHandle : HeapAllocHandle {
  15         [SuppressMessage("Microsoft.Reliability", "CA2006:UseSafeHandleToEncapsulateNativeResources", Justification = @"Pointer is valid while this SafeHandle is valid.")]
  16         private readonly IntPtr _providedTokenBlob;
  17         private readonly uint _providedTokenBlobSize;
  18         [SuppressMessage("Microsoft.Reliability", "CA2006:UseSafeHandleToEncapsulateNativeResources", Justification = @"Pointer is valid while this SafeHandle is valid.")]
  19         private readonly IntPtr _referredTokenBlob;
  20         private readonly uint _referredtokenBlobSize;
  21
  22         internal TlsTokenBindingHandle(IntPtr mgdContext) {
  23             int hr = UnsafeIISMethods.MgdGetTlsTokenBindingIdentifiers(
  24                 mgdContext,
  25                 ref handle,
  26                 out _providedTokenBlob,
  27                 out _providedTokenBlobSize,
  28                 out _referredTokenBlob,
  29                 out _referredtokenBlobSize);
  30             Misc.ThrowIfFailedHr(hr);
  31         }
  32
  33         public byte[] GetProvidedToken() {
  34             return GetTokenImpl(_providedTokenBlob, _providedTokenBlobSize);
  35         }
  36
  37         public byte[] GetReferredToken() {
  38             return GetTokenImpl(_referredTokenBlob, _referredtokenBlobSize);
  39         }
  40
  41         private byte[] GetTokenImpl(IntPtr blob, uint blobSize) {
  42             if (blob == IntPtr.Zero || blobSize == 0) {
  43                 return null;
  44             }
  45             else {
  46                 byte[] retVal = new byte[blobSize];
  47                 int length = retVal.Length; // checks for overflow
  48                 bool refAdded = false;
  49
  50                 RuntimeHelpers.PrepareConstrainedRegions();
  51                 try
  52                 {
  53                     DangerousAddRef(ref refAdded);
  54                     Marshal.Copy(blob, retVal, 0, length);
  55                 }
  56                 finally
  57                 {
  58                     if (refAdded)
  59                     {
  60                         DangerousRelease();
  61                     }
  62                 }
  63
  64                 return retVal;
  65             }
  66         }
  67     }
  68 }