de.tuttas.util.LDAPUtil.java Source code

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Here is the source code for de.tuttas.util.LDAPUtil.java

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package de.tuttas.util;

import de.tuttas.config.Config;
import de.tuttas.restful.auth.Roles;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.net.ConnectException;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.naming.CommunicationException;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

/**
 * LDAP Verbindung
 *
 * @author Jrg
 */
public class LDAPUtil {

    private static LDAPUtil instance;

    private InitialDirContext context;
    private SearchControls ctrls;

    /**
     * Abfrage der Instanz der LDAP Verbiundung
     *
     * @return die Instanz
     */
    public static LDAPUtil getInstance() {
        if (instance == null) {
            instance = new LDAPUtil();
        }
        return instance;
    }

    private LDAPUtil() {
    }

    public static void main(String[] args) {
        LDAPUtil lpd = LDAPUtil.getInstance();
        LDAPUser u;
        try {
            u = lpd.authenticateJndi("Fisi14a.aue", "Tuttas1!");
            Log.d("Habe gefunden " + u);
        } catch (Exception ex) {
            ex.printStackTrace();
        }

    }

    /**
     * Benutzer aus der LDAP Abfragen
     *
     * @param username Benutzername
     * @param password Kennwort
     * @return der Benutzer
     * @throws Exception Wenn etwas schief ging
     */
    public LDAPUser authenticateJndi(String username, String password) throws Exception {
        // Anbindung ans LDAP
        Properties props = new Properties();
        props.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        props.put(Context.PROVIDER_URL, Config.getInstance().ldaphost);
        props.put(Context.SECURITY_PRINCIPAL, Config.getInstance().bindUser);//adminuser - User with special priviledge, dn user
        props.put(Context.SECURITY_CREDENTIALS, Config.getInstance().bindPassword);//dn user password
        try {
            context = new InitialDirContext(props);
            ctrls = new SearchControls();
            ctrls.setReturningAttributes(new String[] { "description", "mail", "sn", "initials", "givenName",
                    "memberOf", "userPrincipalName", "distinguishedName" });
            ctrls.setSearchScope(SearchControls.SUBTREE_SCOPE);
        } catch (NamingException ex) {
            Logger.getLogger(LDAPUtil.class.getName()).log(Level.SEVERE, null, ex);
        }
        NamingEnumeration<javax.naming.directory.SearchResult> answers = context
                .search(Config.getInstance().userContext, "(cn=" + username + ")", ctrls);
        Log.d("answers=" + answers);
        Log.d("answers=" + answers.hasMore());

        if (!answers.hasMore()) {
            return null;
        }

        javax.naming.directory.SearchResult result = answers.nextElement();

        try {
            for (NamingEnumeration ae = result.getAttributes().getAll(); ae.hasMore();) {
                Attribute attr = (Attribute) ae.next();
                Log.d("attribute: " + attr.getID());

                /* print each value */
                for (NamingEnumeration e = attr.getAll(); e.hasMore(); System.out.println("value: " + e.next()))
                    ;
            }
        } catch (NamingException e) {
            e.printStackTrace();
        }

        String inititials = "";
        if (result.getAttributes().get("initials") != null) {
            inititials = result.getAttributes().get("initials").getAll().next().toString();
        }
        LDAPUser u;
        if (result.getAttributes().get("mail") == null) {
            u = new LDAPUser(result.getAttributes().get("sn").getAll().next().toString(),
                    result.getAttributes().get("givenName").getAll().next().toString(), "", inititials);
        } else {
            u = new LDAPUser(result.getAttributes().get("sn").getAll().next().toString(),
                    result.getAttributes().get("givenName").getAll().next().toString(),
                    result.getAttributes().get("mail").getAll().next().toString(), inititials);
        }

        String dName = result.getAttributes().get("distinguishedName").getAll().next().toString();
        Log.d("dName=" + dName);
        if (dName.contains("OU=Lehrer")) {
            Log.d("Ich bin ein Lehrer");
            u.setRole(Roles.toString(Roles.LEHRER));
        } else {
            Log.d("Ich bin ein Schler");
            u.setRole(Roles.toString(Roles.SCHUELER));
            if (result.getAttributes().get("memberOf") != null) {
                String memberOf = result.getAttributes().get("memberOf").getAll().next().toString();
                String courseName = memberOf.split(",")[0];
                courseName = courseName.substring(courseName.indexOf("=") + 1);
                Log.d("Name der Klasse ist " + courseName);
                u.setCourse(courseName);
            }
        }

        String user = result.getNameInNamespace();

        try {

            props = new Properties();
            props.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
            props.put(Context.PROVIDER_URL, Config.getInstance().ldaphost);
            props.put(Context.SECURITY_PRINCIPAL, user);
            props.put(Context.SECURITY_CREDENTIALS, password);

            context = new InitialDirContext(props);
        } catch (Exception e) {
            return null;
        }
        return u;
    }
}