Oid.cs

using System.Security.Cryptography.X509Certificates;

namespace System.Security.Cryptography
{
    public sealed class Oid
    {
        private string m_value;

        private string m_friendlyName;

        private OidGroup m_group;

        public string Value
        {
            get
            {
                return m_value;
            }
            set
            {
                m_value = value;
            }
        }

        public string FriendlyName
        {
            get
            {
                if (m_friendlyName == null && m_value != null)
                {
                    m_friendlyName = System.Security.Cryptography.X509Certificates.X509Utils.FindOidInfoWithFallback(1u, m_value, m_group);
                }
                return m_friendlyName;
            }
            set
            {
                m_friendlyName = value;
                if (m_friendlyName != null)
                {
                    string text = System.Security.Cryptography.X509Certificates.X509Utils.FindOidInfoWithFallback(2u, m_friendlyName, m_group);
                    if (text != null)
                    {
                        m_value = text;
                    }
                }
            }
        }

        public Oid()
        {
        }

        public Oid(string oid)
            : this(oid, OidGroup.All, lookupFriendlyName: true)
        {
        }

        internal Oid(string oid, OidGroup group, bool lookupFriendlyName)
        {
            if (lookupFriendlyName)
            {
                string text = System.Security.Cryptography.X509Certificates.X509Utils.FindOidInfoWithFallback(2u, oid, group);
                if (text == null)
                {
                    text = oid;
                }
                Value = text;
            }
            else
            {
                Value = oid;
            }
            m_group = group;
        }

        public Oid(string value, string friendlyName)
        {
            m_value = value;
            m_friendlyName = friendlyName;
        }

        public Oid(Oid oid)
        {
            if (oid == null)
            {
                throw new ArgumentNullException("oid");
            }
            m_value = oid.m_value;
            m_friendlyName = oid.m_friendlyName;
            m_group = oid.m_group;
        }

        private Oid(string value, string friendlyName, OidGroup group)
        {
            m_value = value;
            m_friendlyName = friendlyName;
            m_group = group;
        }

        public static Oid FromFriendlyName(string friendlyName, OidGroup group)
        {
            if (friendlyName == null)
            {
                throw new ArgumentNullException("friendlyName");
            }
            string text = System.Security.Cryptography.X509Certificates.X509Utils.FindOidInfo(2u, friendlyName, group);
            if (text == null)
            {
                throw new CryptographicException(SR.GetString("Cryptography_Oid_InvalidValue"));
            }
            return new Oid(text, friendlyName, group);
        }

        public static Oid FromOidValue(string oidValue, OidGroup group)
        {
            if (oidValue == null)
            {
                throw new ArgumentNullException("oidValue");
            }
            string text = System.Security.Cryptography.X509Certificates.X509Utils.FindOidInfo(1u, oidValue, group);
            if (text == null)
            {
                throw new CryptographicException(SR.GetString("Cryptography_Oid_InvalidValue"));
            }
            return new Oid(oidValue, text, group);
        }
    }
}