Method authenticate

src/remote/server/server.cpp:640–823

	{ }

	bool authenticate(PACKET* send, unsigned flags)
	{
#ifdef DEV_BUILD
		if (++hopsCount > 10)
#else
		if (++hopsCount > 100)
#endif
		{
			(Arg::Gds(isc_login) << Arg::Gds(isc_auth_handshake_limit)).raise();
		}

		if (authPort->port_srv_auth_block->authCompleted())
		{
			accept(send, &authPort->port_srv_auth_block->authBlockWriter);
			return true;
		}

		bool working = true;
		LocalStatus ls;
		CheckStatusWrapper st(&ls);

		authPort->port_srv_auth_block->createPluginsItr();
		authItr = authPort->port_srv_auth_block->plugins;
		if (!authItr)
		{
			if (authPort->port_protocol >= PROTOCOL_VERSION13)
			{
				send->p_operation = op_cont_auth;
				authPort->port_srv_auth_block->extractDataFromPluginTo(&send->p_auth_cont);
				authPort->send(send);
				memset(&send->p_auth_cont, 0, sizeof send->p_auth_cont);
				return false;
			}
		}

		while (authItr && working && authItr->hasData())
		{
			if (!authServer)
			{
				authServer = authItr->plugin();
				authPort->port_srv_auth_block->authBlockWriter.setPlugin(authItr->name());

				if (authPort->getPortConfig()->getCryptSecurityDatabase() &&
					authPort->port_protocol >= PROTOCOL_VERSION15 &&
					authPort->port_server_crypt_callback)
				{
					authServer->setDbCryptCallback(&st, authPort->port_server_crypt_callback->getInterface());
				}
			}

			// if we asked for more data but received nothing switch to next plugin
			const bool forceNext = (flags & AUTH_CONTINUE) &&
				(!authPort->port_srv_auth_block->hasDataForPlugin()) &&
				(!authPort->port_srv_auth_block->authCompleted());

			HANDSHAKE_DEBUG(fprintf(stderr, "Srv: authenticate: ServerAuth calls plug %s\n",
				forceNext ? "forced-NEXT" : authItr->name()));
			int authResult = forceNext ? IAuth::AUTH_CONTINUE :