/*

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package com.nokia.mj.impl.installer.midp2.install.steps;

import com.nokia.mj.impl.installer.exetable.ExeBall;

import com.nokia.mj.impl.installer.exetable.ExeStep;

import com.nokia.mj.impl.installer.storagehandler.SuiteInfo;

import com.nokia.mj.impl.installer.utils.Log;

import com.nokia.mj.impl.rt.installer.ApplicationInfoImpl;

import com.nokia.mj.impl.rt.support.ApplicationInfo;

import com.nokia.mj.impl.security.midp.authentication.AuthenticationModule;

import com.nokia.mj.impl.security.packageprotection.PackageProtector;

import com.nokia.mj.impl.security.packageprotection.ScanCheck;

public class CheckJarPackages extends ExeStep

{

    public void execute(ExeBall aBall)

    {

        InstallBall ball = (InstallBall)aBall;

        // Let the security framework know the unique id of

        // the installation drive. This is needed to determine

        // if tamper detection is needed.

        AuthenticationModule.getInstance().setMediaId(

            ball.iSuite.getUid(), ball.iSuite.getMediaId());

        // Application package scanning must be skipped if instructed so

        if (ball.iArgs.get("skipjarcheck") != null)

        {

            Log.log("Skipping application package check");

            return;

        }

        // Jar packages check must be skipped in preinstallation

        // of manufacturer and operator domain applications

        // to optimize preinstallation performance.

        String domain = null;

        if (ball.iAuthenticationCredentials != null)

        {

            for (int i = 0; i < ball.iAuthenticationCredentials.length; i++)

            {

                domain = ball.iAuthenticationCredentials[i]

                         .getProtectionDomainCategory();

                Log.log("Protection domain: " + domain);

            }

        }

        if (domain != null)

        {

            // Set domain to ApplicationInfo so that possible installation

            // time security prompts display correct security icons.

            ApplicationInfoImpl appInfoImpl =

                (ApplicationInfoImpl)ApplicationInfo.getInstance();

            appInfoImpl.setProtectionDomain(domain);

        }

        // Application touch support detection is not needed

        // if Nokia-MIDlet-On-Screen-Keypad has been defined.

        boolean touchDetection = true;

        {

            touchDetection = false;

        }

        // Application package scanning must not be skipped for

        // preinstalled applications when application touch support

        // detection is needed.

        if (!touchDetection && ball.iPreinstallation && domain != null &&

                (domain.equals(ApplicationInfo.MANUFACTURER_DOMAIN) ||

                 domain.equals(ApplicationInfo.OPERATOR_DOMAIN)))

        {

            Log.log("Skipping application package check for " + domain +

                    " domain application during preinstallation");

            return;

        }

        ScanCheck scanChecks = null;

        if (touchDetection)

        {

            // Automatic touch support detection: if the application

            // implements a class which inherits from Canvas and

            // implements any of pointerDragged, pointerPressed,

            // or pointerReleased methods, assume that the

            // application is touch enabled and disable the

            // on-screen-keypad.

            ScanCheck.BaseClassCheck[] baseClassChecks =

                new ScanCheck.BaseClassCheck[]

            {

                new ScanCheck.BaseClassCheck("javax/microedition/lcdui/Canvas"),

                new ScanCheck.BaseClassCheck("javax/microedition/lcdui/game/GameCanvas"),

                new ScanCheck.BaseClassCheck("com/nokia/mid/ui/FullCanvas"),

            };

            ScanCheck.MethodCheck[] methodChecks = new ScanCheck.MethodCheck[]

            {

                new ScanCheck.MethodCheck("pointerDragged", "(II)V"),

                new ScanCheck.MethodCheck("pointerPressed", "(II)V"),

                new ScanCheck.MethodCheck("pointerReleased", "(II)V"),

            };

            scanChecks = new ScanCheck(baseClassChecks, methodChecks);

        }

        else

        {

            Log.log("Touch detection is disabled");

        }

        ball.log("Checking application packages for " + ball.iJarFilename);

        PackageProtector pp = PackageProtector.getInstance();

        pp.scanApplication(ball.iJarFilename, scanChecks);

        // Check the scanCheck results.

        if (touchDetection && isTouchEnabled(scanChecks))

        {

            Log.log("Application is touch enabled, disabling on-screen-keypad");

            ball.iSuite.setOnScreenKeypad(SuiteInfo.OSK_NO);

        }

    }

    public void cancel(ExeBall aBall)

    {

        // nop

    }

    private boolean isTouchEnabled(ScanCheck aScanCheck)

    {

        Log.log("isTouchEnabled:\n" + aScanCheck);

        // Loop through matching methods and check if it is a

        // Canvas class which implements them.

        for (int i = 0; i < aScanCheck.iMethodChecks.length; i++)

        {

            ScanCheck.MethodCheckResult[] methodResults =

                aScanCheck.iMethodChecks[i].iResults;

            if (methodResults != null && methodResults.length > 0)

            {

                for (int j = 0; j < methodResults.length; j++)

                {

                    ScanCheck.MethodCheckResult methodResult = methodResults[j];

                    if (methodResult.iCodeLength <= 1)

                    {

                        // Method has an empty implementation, ignore it.

                        continue;

                    }

                    if (isCanvasClass(methodResult.iClassName, aScanCheck))

                    {

                        // There is a class which inherits from Canvas

                        // and which implements one of the touch

                        // methods, so assume that application

                        // is touch enabled and disable the

                        // on-screen-keypad.

                        Log.log("Class " + methodResult.iClassName +

                                " inherits from Canvas and implements " +

                                aScanCheck.iMethodChecks[i].iMethodName +

                                " of code length " +

                                methodResult.iCodeLength);

                        return true;

                    }

                }

            }

        }

        return false;

    }

    private boolean isCanvasClass(String aClassName, ScanCheck aScanCheck)

    {

        for (int i = 0; i < aScanCheck.iBaseClassChecks.length; i++)

        {

            if (aScanCheck.iBaseClassChecks[i].iClassNames != null)

            {

                for (int j = 0;

                        j < aScanCheck.iBaseClassChecks[i].iClassNames.length;

                        j++)

                {

                    if (aClassName.equals(

                                aScanCheck.iBaseClassChecks[i].iClassNames[j]))

                    {

                        return true;

                    }

                }

            }

        }

        return false;

    }

}