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/*
 * Copyright (C) 2006-2010 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see .
 */

package org.filesys.smb.nt;

/**
 * Well Known Security IDs Class
 *
 * @author gkspencer
 */
public class WellKnownSID {

    //	Well known security IDs
    public static final SID SIDEveryone         = new SID("Everyone", 1, 1, 0);
    public static final SID SIDBuiltinDomain    = new SID("Builtin", 1, 5, 32);
    public static final SID SIDLocalSystem      = new SID("LocalSystem", 1, 5, 18);

    /**
     * Return a well known SID name, return null if the SID is not a well known SID
     *
     * @param sid SID
     * @return String
     */
    public static final String getSIDName(SID sid) {

        //	Check the revision and identifier authority
        if (sid.getRevision() != 1 ||
                sid.getSubauthorityCount() != 1)
            return null;

        //	Get the sub-authority value to determine the name
        String name = null;
        int identAuth = sid.getIdentifierAuthority()[5];
        int subAuth = sid.getSubauthority(0);

        if (identAuth == SID.IdentAuthWorld) {

            if (subAuth == SID.SubAuthWorld)
                name = "Everyone";
        } else if (identAuth == SID.IdentAuthNT) {

            //	Determine the well known SID name
            switch (sid.getSubauthority(0)) {
                case SID.SubAuthNTDialup:
                    name = "Dialup";
                    break;
                case SID.SubAuthNTNetwork:
                    name = "Network";
                    break;
                case SID.SubAuthNTBatch:
                    name = "Batch";
                    break;
                case SID.SubAuthNTInteractive:
                    name = "Interactive";
                    break;
                case SID.SubAuthNTService:
                    name = "Service";
                    break;
                case SID.SubAuthNTAnonymous:
                    name = "Anonymous";
                    break;
                case SID.SubAuthNTProxy:
                    name = "Proxy";
                    break;
                case SID.SubAuthNTEnterpriseCtrl:
                    name = "EnterpriseController";
                    break;
                case SID.SubAuthNTPrincipalSelf:
                    name = "PrincipalSelf";
                    break;
                case SID.SubAuthNTAuthenticated:
                    name = "AuthenticatedUser";
                    break;
                case SID.SubAuthNTRestrictedCode:
                    name = "RestrictedCode";
                    break;
                case SID.SubAuthNTTerminalServer:
                    name = "TerminalServer";
                    break;
                case SID.SubAuthNTLocalSystem:
                    name = "LocalSystem";
                    break;
                case SID.SubAuthNTNonUnique:
                    name = "NTNonUnique";
                    break;
                case SID.SubAuthNTBuiltinDomain:
                    name = "BuilinDomain";
                    break;
            }
        }

        //	Set the SID name
        if (name != null)
            sid.setName(name);

        //	Return the name
        return name;
    }
}