SafeFreeContextBufferChannelBinding.cs

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using System.Runtime.InteropServices;
using System.Security.Authentication.ExtendedProtection;
 
namespace System.Net.Security;
 
internal abstract class SafeFreeContextBufferChannelBinding : ChannelBinding
{
    private int _size;
 
    public override int Size => _size;
 
    public override bool IsInvalid
    {
        get
        {
            if (!(handle == new IntPtr(0)))
            {
                return handle == new IntPtr(-1);
            }
            return true;
        }
    }
 
    internal void Set(IntPtr value)
    {
        handle = value;
    }
 
    internal static SafeFreeContextBufferChannelBinding CreateEmptyHandle()
    {
        return new SafeFreeContextBufferChannelBinding_SECURITY();
    }
 
    public unsafe static int QueryContextChannelBinding(SafeDeleteContext phContext, global::Interop.SspiCli.ContextAttribute contextAttribute, SecPkgContext_Bindings* buffer, SafeFreeContextBufferChannelBinding refHandle)
    {
        int num = -2146893055;
        if (contextAttribute != global::Interop.SspiCli.ContextAttribute.SECPKG_ATTR_ENDPOINT_BINDINGS && contextAttribute != global::Interop.SspiCli.ContextAttribute.SECPKG_ATTR_UNIQUE_BINDINGS)
        {
            return num;
        }
        try
        {
            bool success = false;
            phContext.DangerousAddRef(ref success);
            num = global::Interop.SspiCli.QueryContextAttributesW(ref phContext._handle, contextAttribute, buffer);
        }
        finally
        {
            phContext.DangerousRelease();
        }
        if (num == 0 && refHandle != null)
        {
            refHandle.Set(buffer->Bindings);
            refHandle._size = buffer->BindingsLength;
        }
        if (num != 0)
        {
            refHandle?.SetHandleAsInvalid();
        }
        return num;
    }
 
    public override string ToString()
    {
        if (IsInvalid)
        {
            return null;
        }
        byte[] array = new byte[_size];
        Marshal.Copy(handle, array, 0, array.Length);
        return BitConverter.ToString(array).Replace('-', ' ');
    }
}