Mercurial > hg > Applications > TightVNC_orginal
view src/main/java/com/glavsoft/rfb/protocol/state/SecurityTypeState.java @ 52:472a9bcacb21 draft default tip
TightVNC 2.7.1.0
author | you@cr.ie.u-ryukyu.ac.jp |
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date | Wed, 07 Aug 2013 19:01:17 +0900 |
parents | 4689cc86d6cb |
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// Copyright (C) 2010, 2011, 2012, 2013 GlavSoft LLC. // All rights reserved. // //------------------------------------------------------------------------- // This file is part of the TightVNC software. Please visit our Web site: // // http://www.tightvnc.com/ // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License along // with this program; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. //------------------------------------------------------------------------- // package com.glavsoft.rfb.protocol.state; import com.glavsoft.exceptions.TransportException; import com.glavsoft.exceptions.UnsupportedProtocolVersionException; import com.glavsoft.exceptions.UnsupportedSecurityTypeException; import com.glavsoft.rfb.CapabilityContainer; import com.glavsoft.rfb.protocol.ProtocolContext; import com.glavsoft.rfb.protocol.auth.AuthHandler; import com.glavsoft.rfb.protocol.auth.SecurityType; import com.glavsoft.utils.Strings; import java.util.logging.Logger; public class SecurityTypeState extends ProtocolState { public SecurityTypeState(ProtocolContext context) { super(context); } @Override public boolean next() throws UnsupportedProtocolVersionException, TransportException, UnsupportedSecurityTypeException { negotiateAboutSecurityType(); return true; } protected void negotiateAboutSecurityType() throws TransportException, UnsupportedSecurityTypeException { int secTypesNum = reader.readUInt8(); if (0 == secTypesNum) // throw exception with reason throw new UnsupportedSecurityTypeException(reader.readString()); byte[] secTypes = reader.readBytes(secTypesNum); Logger.getLogger(getClass().getName()).info("Security Types received (" + secTypesNum + "): " + Strings.toString(secTypes)); AuthHandler typeSelected = selectAuthHandler( secTypes, context.getSettings().authCapabilities); setUseSecurityResult(typeSelected); writer.writeByte(typeSelected.getId()); Logger.getLogger(getClass().getName()).info("Security Type accepted: " + typeSelected.getName()); changeStateTo(new AuthenticationState(context, typeSelected)); } /** * Select apropriate security type we supporded from types which server sent * * @param secTypes - byte array with security types server supported * @param authCapabilities * @return {@link AuthHandler} of selected type * @throws UnsupportedSecurityTypeException when no security types server sent we support */ public static AuthHandler selectAuthHandler(byte[] secTypes, CapabilityContainer authCapabilities) throws UnsupportedSecurityTypeException { AuthHandler typeSelected = null; // Tigh Authentication first for (byte type : secTypes) { if (SecurityType.TIGHT_AUTHENTICATION.getId() == (0xff & type)) { typeSelected = SecurityType.implementedSecurityTypes .get(SecurityType.TIGHT_AUTHENTICATION.getId()); if (typeSelected != null) return typeSelected; } } for (byte type : secTypes) { typeSelected = SecurityType.implementedSecurityTypes.get(0xff & type); if (typeSelected != null && authCapabilities.isSupported(typeSelected.getId())) return typeSelected; } throw new UnsupportedSecurityTypeException( "No security types supported. Server sent '" + Strings.toString(secTypes) + "' security types, but we do not support any of their."); } /** * @param typeSelected */ protected void setUseSecurityResult(AuthHandler typeSelected) { // nop for Protocol version 3.8 and above } }