AbsSecurityContextHelper.java

package org.objectweb.jonas.security;

import java.util.ArrayList;

import org.objectweb.jonas.common.JProp;
import org.objectweb.jonas.security.realm.factory.JResource;
import org.objectweb.jonas.security.realm.factory.JResourceException;
import org.objectweb.jonas.security.realm.principals.User;
import org.objectweb.jonas.service.ServiceManager;
import org.objectweb.security.context.SecurityContext;
import org.objectweb.security.context.SecurityCurrent;
import org.objectweb.util.monolog.api.BasicLevel;
import org.objectweb.util.monolog.api.Logger;

public abstract class AbsSecurityContextHelper {

    private static JResource jResource = null;
    
    abstract protected Logger getLogger();
    
    abstract protected String getRealmKey();
    
    abstract protected String getRealmDefault();

    public void login(String principalName, String credential) {

        // No authentication can be made with a null username
        if (principalName == null) {
            getLogger().log(BasicLevel.ERROR, "No username so no authentication");
            return;
        }

        // Does a user with this username exist?
        User user = null;
        try {
            user = getJResource().findUser(principalName);
        } catch (Exception jre) {
            // could not retrieve user
            getLogger().log(BasicLevel.ERROR, "Can not find the user : " + jre.getMessage());
            return;
        }

        // User was not found
        if (user == null) {
            getLogger().log(BasicLevel.DEBUG, "User " + principalName + " not found.");
            return;
        }

        boolean validated = getJResource().isValidUser(user, credential);
        if (!validated) {
            getLogger().log(BasicLevel.ERROR, "The password for the user " + principalName + " is not valid");
            return;
        }

        ArrayList combinedRoles = null;
        try {
            combinedRoles = getJResource().getArrayListCombinedRoles(user);
        } catch (JResourceException jre) {
            getLogger().log(BasicLevel.ERROR, jre.getMessage());
            return;
        }

        SecurityContext ctx = new SecurityContext(principalName, combinedRoles);
        SecurityCurrent current = SecurityCurrent.getCurrent();
        current.setSecurityContext(ctx);
        getLogger().log(BasicLevel.DEBUG, "Login of principalName '" + principalName + "' succeeded.");

    }

    private JResource getJResource() {

        if (jResource != null) {
            return jResource;
        }

        SecurityService securityService = null;
        // Get the Security Service
        try {
            securityService = (SecurityService) ServiceManager.getInstance().getSecurityService();
        } catch (Exception e) {
            // Can't retrieve Security service
            throw new IllegalStateException("can't retrieve Security service");
        }

        String resName = null;
        try {
            resName = JProp.getInstance().getValue(getRealmKey());
        } catch (Exception e) {
            getLogger().log(BasicLevel.ERROR, "Cannot read properties in jonas.properties file.");
        }
        if (resName == null) {
            getLogger().log(BasicLevel.DEBUG, "Cannot read property '" + getRealmKey() + "' in jonas.properties file. Use default value = '" + getRealmDefault() + "'.");
            resName = getRealmDefault();
        }

        // Get the resource from the security service
        jResource = securityService.getJResource(resName);
        if (jResource == null) {
            throw new IllegalStateException("Can't retrieve resource '" + resName + "' from the security service");
        }
        return jResource;
    }


}

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