namespace com.hitrust.Security.Certificates
{
    using com.hitrust.Security;
    using System;
    using System.Collections;
    using System.Reflection;
    using System.Runtime.InteropServices;

    public class DistinguishedName
    {
        private ArrayList m_List;

        public DistinguishedName()
        {
            this.m_List = new ArrayList();
        }

        internal DistinguishedName(CertificateNameInfo cni) : this()
        {
            this.Initialize(cni);
        }

        internal DistinguishedName(IntPtr input, int length) : this()
        {
            int size = 0;
            SspiProvider.CryptDecodeObject(0x10001, new IntPtr(20), input, length, 0, IntPtr.Zero, ref size);
            if (size <= 0)
            {
                throw new CertificateException("Unable to decode the name of the certificate.");
            }
            IntPtr buffer = Marshal.AllocHGlobal(size);
            if (SspiProvider.CryptDecodeObject(0x10001, new IntPtr(20), input, length, 0, buffer, ref size) == 0)
            {
                throw new CertificateException("Unable to decode the name of the certificate.");
            }
            try
            {
                CertificateNameInfo cni = (CertificateNameInfo) Marshal.PtrToStructure(buffer, typeof(CertificateNameInfo));
                this.Initialize(cni);
            }
            catch (CertificateException ce)
            {
                throw ce;
            }
            catch (Exception e)
            {
                throw new CertificateException("Could not get the certificate distinguished name.", e);
            }
            finally
            {
                if (buffer != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(buffer);
                }
            }
        }

        public int Add(NameAttribute attribute)
        {
            return this.m_List.Add(attribute);
        }

        public void Clear()
        {
            this.m_List.Clear();
        }

        public bool Contains(NameAttribute value)
        {
            return this.m_List.Contains(value);
        }

        public int IndexOf(NameAttribute value)
        {
            return this.m_List.IndexOf(value);
        }

        private void Initialize(CertificateNameInfo cni)
        {
            if (cni.cRDN <= 0)
            {
                throw new CertificateException("Certificate does not have a subject relative distinguished name.");
            }
            for (int i = 0; i < cni.cRDN; i++)
            {
                RelativeDistinguishedName cr = (RelativeDistinguishedName) Marshal.PtrToStructure(new IntPtr(cni.rgRDN.ToInt64() + (i * Marshal.SizeOf(typeof(RelativeDistinguishedName)))), typeof(RelativeDistinguishedName));
                for (int j = 0; j < cr.cRDNAttr; j++)
                {
                    RdnAttribute cra = (RdnAttribute) Marshal.PtrToStructure(new IntPtr(cr.rgRDNAttr.ToInt64() + (j * Marshal.SizeOf(typeof(RdnAttribute)))), typeof(RdnAttribute));
                    this.m_List.Add(new NameAttribute(Marshal.PtrToStringAnsi(cra.pszObjId), Marshal.PtrToStringUni(cra.pbData)));
                }
            }
        }

        public void Insert(int index, NameAttribute value)
        {
            this.m_List.Insert(index, value);
        }

        public void Remove(NameAttribute value)
        {
            this.m_List.Remove(value);
        }

        public void RemoveAt(int index)
        {
            this.m_List.RemoveAt(index);
        }

        public int Count
        {
            get
            {
                return this.m_List.Count;
            }
        }

        public NameAttribute this[int index]
        {
            get
            {
                return (NameAttribute) this.m_List[index];
            }
            set
            {
                this.m_List[index] = value;
            }
        }
    }
}