X509Extension.cs

using System.Runtime.InteropServices;

namespace System.Security.Cryptography.X509Certificates
{
    public class X509Extension : AsnEncodedData
    {
        private bool m_critical;

        public bool Critical
        {
            get
            {
                return m_critical;
            }
            set
            {
                m_critical = value;
            }
        }

        internal X509Extension(string oid)
            : base(new Oid(oid, System.Security.Cryptography.OidGroup.ExtensionOrAttribute, lookupFriendlyName: false))
        {
        }

        internal X509Extension(IntPtr pExtension)
        {
            CAPIBase.CERT_EXTENSION cERT_EXTENSION = (CAPIBase.CERT_EXTENSION)Marshal.PtrToStructure(pExtension, typeof(CAPIBase.CERT_EXTENSION));
            m_critical = cERT_EXTENSION.fCritical;
            string pszObjId = cERT_EXTENSION.pszObjId;
            m_oid = new Oid(pszObjId, System.Security.Cryptography.OidGroup.ExtensionOrAttribute, lookupFriendlyName: false);
            byte[] array = new byte[cERT_EXTENSION.Value.cbData];
            if (cERT_EXTENSION.Value.pbData != IntPtr.Zero)
            {
                Marshal.Copy(cERT_EXTENSION.Value.pbData, array, 0, array.Length);
            }
            m_rawData = array;
        }

        protected X509Extension()
        {
        }

        public X509Extension(string oid, byte[] rawData, bool critical)
            : this(new Oid(oid, System.Security.Cryptography.OidGroup.ExtensionOrAttribute, lookupFriendlyName: true), rawData, critical)
        {
        }

        public X509Extension(AsnEncodedData encodedExtension, bool critical)
            : this(encodedExtension.Oid, encodedExtension.RawData, critical)
        {
        }

        public X509Extension(Oid oid, byte[] rawData, bool critical)
            : base(oid, rawData)
        {
            if (base.Oid == null || base.Oid.Value == null)
            {
                throw new ArgumentNullException("oid");
            }
            if (base.Oid.Value.Length == 0)
            {
                throw new ArgumentException(SR.GetString("Arg_EmptyOrNullString"), "oid.Value");
            }
            m_critical = critical;
        }

        public override void CopyFrom(AsnEncodedData asnEncodedData)
        {
            if (asnEncodedData == null)
            {
                throw new ArgumentNullException("asnEncodedData");
            }
            X509Extension x509Extension = asnEncodedData as X509Extension;
            if (x509Extension == null)
            {
                throw new ArgumentException(SR.GetString("Cryptography_X509_ExtensionMismatch"));
            }
            base.CopyFrom(asnEncodedData);
            m_critical = x509Extension.Critical;
        }
    }
}