midletsuiteimpl.jpp

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/*
 *
 *
 * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation.
 * 
 * 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 version 2 for more details (a copy is
 * included at /legal/license.txt).
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package com.sun.midp.midletsuite;

import java.io.*;

import java.util.*;

import javax.microedition.io.*;

import javax.microedition.lcdui.*;

import javax.microedition.midlet.*;

import com.sun.j2me.security.AccessController;

import com.sun.midp.io.*;

import com.sun.midp.i18n.Resource;
import com.sun.midp.i18n.ResourceConstants;

import com.sun.midp.security.*;

import com.sun.midp.midlet.*;

import com.sun.midp.midletsuite.SuiteProperties;

import com.sun.midp.io.j2me.storage.*;

import com.sun.midp.log.Logging;
import com.sun.midp.log.LogChannels;
import com.sun.midp.main.MIDletSuiteVerifier;

import com.sun.midp.util.Properties;
import com.sun.midp.configurator.Constants;

/**
 * Implements the required MIDletSuite functionality needed by the
 * system.
 */
public final class MIDletSuiteImpl implements MIDletSuite {
    /** This class has a different security domain than the application. */
    private static SecurityToken classSecurityToken;

    /** MIDlet Suite Storage. */
    private MIDletSuiteStorage midletSuiteStorage;

    /** Security token for this suite. */
    private SecurityHandler securityHandler;

    /** Suite properties of the application descriptor and manifest. */
    private SuiteProperties suiteProperties;

    /** Suite settings for this suite. */
    private SuiteSettings suiteSettings;

    /** Installation information for this suite. */
    private InstallInfo installInfo;

    /** The ID of this suite. */
    private int id;

    /** Cache of MIDlet-1 name. */
    private String midlet_1_name;

    /** Cache of MIDlet-1 class. */
    private String midlet_1_class;

    /**
     * Number of midlets in this suite. less than 0 mean they need to
     * counted.
     */
    private int numberOfMidlets = -1;

    /**
     * Indicator to check if the suite has already been locked
     */
    private boolean locked = false;

    /**
     * Initializes the security token for this class, so it can
     * perform actions that a normal MIDlet Suite cannot.
     *
     * @param token security token for this class
     */
    static void initSecurityToken(SecurityToken token) {
        if (classSecurityToken != null) {
            return;
        }

        classSecurityToken = token;
    }

    /**
     * Constructs MIDletSuiteImpl from an installed MIDlet Suite.
     *
     * @param theID unique identifier for this suite
     */
    MIDletSuiteImpl(int theID)
            throws MIDletSuiteCorruptedException {
        id = theID;
        locked = true;

        suiteProperties = new SuiteProperties(id);
        suiteSettings = new SuiteSettings(id);
        suiteSettings.load();
        installInfo = new InstallInfo(id);

        try {
            installInfo.load();
        } catch (IOException ioe) {
            throw new MIDletSuiteCorruptedException(
                "installInfo.load IOException");
        }
    }

    /**
     * Gets a property of the suite. A property is an attribute from
     * either the application descriptor or JAR Manifest.
     *
     * @param key the name of the property
     * @return A string with the value of the property.
     *    <code>null</code> is returned if no value is available for
     *          the key.
     */
    public String getProperty(String key) {
        guaranteeMIDletSuiteLocked("getProperty");

        return suiteProperties.getProperty(key);
    }

    /**
     * Replace or add a property to the suite for this run only.
     *
     * @param token token with the AMS permission set to allowed,
     *        can be null to use the suite's permission
     * @param key the name of the property
     * @param value the value of the property
     *
     * @exception SecurityException if the caller's token does not have
     *            internal AMS permission
     */
    public void setTempProperty(SecurityToken token, String key,
            String value) {
        guaranteeMIDletSuiteLocked("setTempProperty");

        if (token != null) {
            token.checkIfPermissionAllowed(Permissions.AMS);
        } else {
            AccessController.checkPermission(Permissions.AMS_PERMISSION_NAME);
        }

        suiteProperties.setTempProperty(key, value);
    }

    /**
     * Checks to see the suite has the ALLOW level for specific permission.
     * This is used for by internal APIs that only provide access to
     * trusted system applications.
     *
     * @param permission permission ID from com.sun.midp.security.Permissions
     *
     * @exception SecurityException if the suite is not allowed the permission
     */
    public void checkIfPermissionAllowed(String permission) {
        if (checkPermission(permission) != 1) {
            throw new SecurityException(SecurityToken.STD_EX_MSG);
        }
    }

    /**
     * Checks for permission and throw an exception if not allowed.
     * May block to ask the user a question.
     *
     * @param permission ID of the permission to check for,
     *      the ID must be from
     *      {@link com.sun.midp.security.Permissions}
     * @param resource string to insert into the question, can be null if
     *        no %2 in the question
     *
     * @exception SecurityException if the permission is not
     *            allowed by this token
     * @exception InterruptedException if another thread interrupts the
     *   calling thread while this method is waiting to preempt the
     *   display.
     */
    public void checkForPermission(String permission, String resource)
            throws InterruptedException {
        guaranteeMIDletSuiteLocked("checkForPermission");
        checkForPermission(permission,
            getProperty(SUITE_NAME_PROP), resource, null);
    }

    /**
     * Checks for permission and throw an exception if not allowed.
     * May block to ask the user a question.
     *
     * @param permission ID of the permission to check for,
     *      the ID must be from
     *      {@link com.sun.midp.security.Permissions}
     * @param resource string to insert into the question, can be null if
     *        no %2 in the question
     * @param extraValue string to insert into the question,
     *        can be null if no %3 in the question
     *
     * @exception SecurityException if the permission is not
     *            allowed by this token
     * @exception InterruptedException if another thread interrupts the
     *   calling thread while this method is waiting to preempt the
     *   display.
     */
    public void checkForPermission(String permission, String resource,
            String extraValue) throws InterruptedException {
        guaranteeMIDletSuiteLocked("checkForPermission");
        checkForPermission(permission,
            getProperty(SUITE_NAME_PROP), resource, extraValue);
    }

    /**
     * Checks for permission and throw an exception if not allowed.
     * May block to ask the user a question.
     *
     * @param permissionStr ID of the permission to check for,
     *      the ID must be from
     *      {@link com.sun.midp.security.Permissions}
     * @param name name of the suite, %1 in the question
     * @param resource string to insert into the question, can be null if
     *        no %2 in the question
     * @param extraValue string to insert into the question,
     *        can be null if no %3 in the question
     *
     * @exception SecurityException if the permission is not
     *            allowed by this token
     * @exception InterruptedException if another thread interrupts the
     *   calling thread while this method is waiting to preempt the
     *   display.
     */
    private void checkForPermission(String permissionStr, String name,
            String resource, String extraValue) throws InterruptedException {
        boolean settingsChanged = true; // assume they changed
        suiteSettings.load();

        try {
			int permission = Permissions.getId(permissionStr);
            settingsChanged = getSecurityHandler().checkForPermission(
                                  permissionStr,
                                  Permissions.getTitle(permission),
                                  Permissions.getQuestion(permission),
                                  Permissions.getOneshotQuestion(permission),
                                  name, resource, extraValue);
        } finally {
            if (settingsChanged) {
                suiteSettings.save();
            }
        }
    }

    /**
     * Gets the status of the specified permission.
     * If no API on the device defines the specific permission
     * requested then it must be reported as denied.
     * If the status of the permission is not known because it might
     * require a user interaction then it should be reported as unknown.
     *
     * @param permission to check if denied, allowed, or unknown
     * @return 0 if the permission is denied; 1 if the permission is allowed;
     *  -1 if the status is unknown
     */
    public int checkPermission(String permission) {
        guaranteeMIDletSuiteLocked("checkPermission");
        suiteSettings.load();

        return getSecurityHandler().checkPermission(permission);
    }

    /**
     * Gets the unique ID of the suite.
     *
     * @return suite ID
     */
    public int getID() {
        guaranteeMIDletSuiteLocked("getID");

        return id;
    }

    /**
     * Asks the user want to interrupt the current MIDlet with
     * a new MIDlet that has received network data.
     *
     * @param connection connection to place in the permission question or
     *        null for alarm
     *
     * @return true if the use wants interrupt the current MIDlet, else false
     */
    public boolean permissionToInterrupt(String connection) {
        String name;
        MIDletSuite current;
        int question;
        String currentName;
        boolean interruptOk;
        boolean settingsChanged = false;

        guaranteeMIDletSuiteLocked("permissionToInterrupt");
        suiteSettings.load();

        switch (suiteSettings.getPushInterruptSetting()) {
        case Permissions.ALLOW:
        case Permissions.BLANKET_GRANTED:
            return true;

        case Permissions.BLANKET_DENIED:
        case Permissions.NEVER:
            return false;
        }

        /* Any other cases require prompting the user. */

        name = getSuiteNameForInterrupt();

        // The currently running suite controls what question to ask.
        current = MIDletStateHandler.getMidletStateHandler().getMIDletSuite();
        if (current instanceof MIDletSuiteImpl) {
            MIDletSuiteImpl temp = (MIDletSuiteImpl)current;
            if (connection == null) {
                question = temp.getAlarmInterruptQuestion();
            } else {
                question = temp.getPushInterruptQuestion();
            }

            currentName = temp.getSuiteNameForInterrupt();
        } else {
            // Use the internal MIDlet question
            question = ResourceConstants.
                           AMS_MIDLETSUITELDR_PUSH_INTERRUPT_QUESTION;

            currentName = Resource.getString
                (ResourceConstants.AMS_MIDLETSUITEIMPL_CURR_APP);
        }

        try {
            interruptOk = SecurityHandler.askUserForPermission(
                          classSecurityToken, isTrusted(),
                          Resource.getString(ResourceConstants.AMS_MIDLETSUITEIMPL_INTRPT_QUE),
                          Resource.getString(question),
                          name, currentName, null);
            switch (suiteSettings.getPushInterruptSetting()) {