Opc.Ua.UserIdentity.GetIdentityToken C# (CSharp) Метод

        public UserIdentityToken GetIdentityToken()
        {
            // check for anonymous.
            if (m_token == null)
            {
                AnonymousIdentityToken token = new AnonymousIdentityToken();
                token.PolicyId = m_policyId;
                return token;
            }

            // return a user name token.
            UserNameSecurityToken usernameToken = m_token as UserNameSecurityToken;

            if (usernameToken != null)
            {
                UserNameIdentityToken token = new UserNameIdentityToken();
                token.PolicyId = m_policyId;
                token.UserName = usernameToken.UserName;
                token.DecryptedPassword = usernameToken.Password;
                return token;
            }

            // return an X509 token.
            X509SecurityToken x509Token = m_token as X509SecurityToken;

            if (x509Token != null)
            {
                X509IdentityToken token = new X509IdentityToken();
                token.PolicyId = m_policyId;
                token.CertificateData = x509Token.Certificate.GetRawCertData();
                token.Certificate = x509Token.Certificate;
                return token;
            }
            
            // handle SAML token.
            SamlSecurityToken samlToken = m_token as SamlSecurityToken;

            if (samlToken != null)
            {
                MemoryStream ostrm = new MemoryStream();      
                XmlTextWriter writer = new XmlTextWriter(ostrm, new UTF8Encoding());   
 
                try
                {
                    SamlSerializer serializer = new SamlSerializer();
                    serializer.WriteToken(samlToken, writer, WSSecurityTokenSerializer.DefaultInstance);
                }
                finally
                {
                    writer.Close();
                }

                IssuedIdentityToken wssToken = new IssuedIdentityToken();
                wssToken.PolicyId = m_policyId;
                wssToken.DecryptedTokenData = ostrm.ToArray();

                return wssToken;
            }

            // return a WSS token by default.
            if (m_token != null)
            {
                MemoryStream ostrm = new MemoryStream();
                XmlWriter writer = new XmlTextWriter(ostrm, new UTF8Encoding());

                try
                {
                    WSSecurityTokenSerializer serializer = new WSSecurityTokenSerializer();
                    serializer.WriteToken(writer, m_token);
                }
                finally
                {
                    writer.Close();
                }

                IssuedIdentityToken wssToken = new IssuedIdentityToken();
                wssToken.PolicyId = m_policyId;
                wssToken.DecryptedTokenData = ostrm.ToArray();

                return wssToken;
            }

            return null;
        }
        #endregion