X509ChainElement.cs

using System.Runtime.InteropServices;

namespace System.Security.Cryptography.X509Certificates
{
    public class X509ChainElement
    {
        private X509Certificate2 m_certificate;

        private X509ChainStatus[] m_chainStatus;

        private string m_description;

        public X509Certificate2 Certificate => m_certificate;

        public X509ChainStatus[] ChainElementStatus => m_chainStatus;

        public string Information => m_description;

        private X509ChainElement()
        {
        }

        internal unsafe X509ChainElement(IntPtr pChainElement)
        {
            CAPIBase.CERT_CHAIN_ELEMENT cERT_CHAIN_ELEMENT = new CAPIBase.CERT_CHAIN_ELEMENT(Marshal.SizeOf(typeof(CAPIBase.CERT_CHAIN_ELEMENT)));
            uint num = (uint)Marshal.ReadInt32(pChainElement);
            if (num > Marshal.SizeOf((object)cERT_CHAIN_ELEMENT))
            {
                num = (uint)Marshal.SizeOf((object)cERT_CHAIN_ELEMENT);
            }
            System.Security.Cryptography.X509Certificates.X509Utils.memcpy(pChainElement, new IntPtr(&cERT_CHAIN_ELEMENT), num);
            m_certificate = new X509Certificate2(cERT_CHAIN_ELEMENT.pCertContext);
            if (cERT_CHAIN_ELEMENT.pwszExtendedErrorInfo == IntPtr.Zero)
            {
                m_description = string.Empty;
            }
            else
            {
                m_description = Marshal.PtrToStringUni(cERT_CHAIN_ELEMENT.pwszExtendedErrorInfo);
            }
            if (cERT_CHAIN_ELEMENT.dwErrorStatus == 0)
            {
                m_chainStatus = new X509ChainStatus[0];
            }
            else
            {
                m_chainStatus = X509Chain.GetChainStatusInformation(cERT_CHAIN_ELEMENT.dwErrorStatus);
            }
        }
    }
}