Interop.cs

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using System;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;
 
internal static class Interop
{
    internal static class Crypt32
    {
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        internal struct SSL_EXTRA_CERT_CHAIN_POLICY_PARA
        {
            internal uint cbSize;
 
            internal uint dwAuthType;
 
            internal uint fdwChecks;
 
            internal unsafe char* pwszServerName;
        }
 
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        internal struct CERT_CHAIN_POLICY_PARA
        {
            public uint cbSize;
 
            public uint dwFlags;
 
            public unsafe SSL_EXTRA_CERT_CHAIN_POLICY_PARA* pvExtraPolicyPara;
        }
 
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        internal struct CERT_CHAIN_POLICY_STATUS
        {
            public uint cbSize;
 
            public uint dwError;
 
            public int lChainIndex;
 
            public int lElementIndex;
 
            public unsafe void* pvExtraPolicyStatus;
        }
 
        [DllImport("crypt32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool CertVerifyCertificateChainPolicy(IntPtr pszPolicyOID, SafeX509ChainHandle pChainContext, [In] ref CERT_CHAIN_POLICY_PARA pPolicyPara, [In][Out] ref CERT_CHAIN_POLICY_STATUS pPolicyStatus);
    }
}