Org.BouncyCastle.Asn1.X509.AuthorityKeyIdentifier.GetKeyIdentifier C# (CSharp) Method

		public byte[] GetKeyIdentifier()
        {
			return keyidentifier == null ? null : keyidentifier.GetOctets();
        }

        public static AuthorityKeyIdentifier retrieveAuthorityKeyIdentifier(X509Certificate x509Certificate)
        {
            AuthorityKeyIdentifier authorityKeyIdentifier = new AuthorityKeyIdentifier();
            X509Extension          x509Extension          = x509Certificate.CertificateStructure.TbsCertificate.Extensions.GetExtension(new DerObjectIdentifier(OIDS.OID_AUTHORITY_KEY_IDENTIFIER_EXTENSION));

            if (x509Extension != null)
            {
                Org.BouncyCastle.Asn1.X509.AuthorityKeyIdentifier authorityKeyIdentifierExtension = Org.BouncyCastle.Asn1.X509.AuthorityKeyIdentifier.GetInstance(x509Extension);
                authorityKeyIdentifier.HasAuthorityKeyIdentifier = true;
                authorityKeyIdentifier.IsCritical    = x509Extension.IsCritical;
                authorityKeyIdentifier.keyIdentifier = authorityKeyIdentifierExtension.GetKeyIdentifier();
                //todo: add issuer and serial fields.
            }
            else
            {
                authorityKeyIdentifier.HasAuthorityKeyIdentifier = false;
            }

            return(authorityKeyIdentifier);
        }