Implementasi Algoritma Vernam Cipher dalam Skema Three-Pass Protocol untuk Pengamanan Citra Bitmap Berbasis Android

A-1

LISTING PROGRAM
Menu Proses
package com.example.skripsii;
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java.io.File;
java.io.FileInputStream;
java.io.FileNotFoundException;

java.io.FileOutputStream;
java.io.IOException;
java.io.OutputStreamWriter;
java.text.SimpleDateFormat;
java.util.ArrayList;
java.util.Date;
java.util.Random;
android.app.Activity;
android.app.AlertDialog;
android.content.DialogInterface;
android.content.Intent;
android.database.Cursor;
android.graphics.Bitmap;
android.graphics.Bitmap.Config;
android.graphics.BitmapFactory;
android.graphics.Color;
android.graphics.drawable.BitmapDrawable;
android.net.Uri;
android.os.Bundle;
android.os.Environment;

android.provider.MediaStore;
android.util.Log;
android.view.Menu;
android.view.MenuItem;
android.view.View;
android.widget.Button;
android.widget.EditText;
android.widget.ImageView;
android.widget.Toast;

public class Sender extends Activity implements
View.OnClickListener {
public int SELECT_PICTURE = 1;
public String selectedImagePath;
public double mse1,psnr1;
ArrayList kunci1,kunci2;
ImageView img, imgc1, imgc2, imgc3, imgdekrip;
Bitmap bmp;
Integer baris,kolom;
EditText nama, size1, size2, mse, psnr;

Button btn_pilih, btn_kunci1, btn_kunci2, btn_proses1,
btn_proses2, btn_proses3, btn_dekrip, btn_reset;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sender);
img = (ImageView)findViewById(R.id.image_pilih);
imgc1 = (ImageView)findViewById(R.id.img_c1);
imgc2 = (ImageView)findViewById(R.id.img_c2);

Universitas Sumatera Utara

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imgc3 = (ImageView)findViewById(R.id.img_c3);
imgdekrip = (ImageView)findViewById(R.id.img_dekripsi);
nama = (EditText)findViewById(R.id.et_nama);
size1 = (EditText)findViewById(R.id.et_size1);
size2 = (EditText)findViewById(R.id.et_size2);
mse = (EditText)findViewById(R.id.et_mse);

psnr = (EditText)findViewById(R.id.et_psnr);
btn_pilih = (Button)findViewById(R.id.button_pilih);
btn_pilih.setOnClickListener(this);
btn_kunci1 = (Button)findViewById(R.id.button_kpengirim);
btn_kunci1.setOnClickListener(this);
btn_kunci2 = (Button)findViewById(R.id.button_kpenerima);
btn_kunci2.setOnClickListener(this);
btn_proses1 = (Button)findViewById(R.id.button_c1);
btn_proses1.setOnClickListener(this);
btn_proses2 = (Button)findViewById(R.id.button_c2);
btn_proses2.setOnClickListener(this);
btn_proses3 = (Button)findViewById(R.id.button_c3);
btn_proses3.setOnClickListener(this);
btn_dekrip = (Button)findViewById(R.id.button_dekripsi);
btn_dekrip.setOnClickListener(this);
btn_reset = (Button)findViewById(R.id.button_reset);
btn_reset.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void onActivityResult(int requestCode, int resultCode,
Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
nama.setText(selectedImageUri.toString());
try {
File f = new File(selectedImagePath);
bmp = BitmapFactory.decodeStream(new
FileInputStream(f));
if (f.getPath().endsWith(".bmp")) {
img.setImageBitmap(bmp);
}
else {
nama.setText("");
size1.setText("");

size2.setText("");
img.setImageBitmap(null);
Toast.makeText(getBaseContext(), "Silahkan
pilih gambar dengan ekstensi .bmp",
Toast.LENGTH_SHORT).show();
}
Integer x = bmp.getWidth();
Integer y = bmp.getHeight();

Universitas Sumatera Utara

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size1.setText(x.toString());
size2.setText(y.toString());
if ((bmp.getWidth() > 1000) && (bmp.getHeight() >
1000 )) {
nama.setText("");
size1.setText("");
size2.setText("");

img.setImageBitmap(null);
Toast.makeText(getBaseContext(), "Resolusi Gambar
diatas 1000x1000 piksel, silahkan pilih gambar
yang lebih kecil dari 1000x1000 piksel",
Toast.LENGTH_SHORT).show();
}
}
catch (FileNotFoundException e){
e.printStackTrace();
}
}
}
}
public String getPath(Uri uri) {
if( uri == null ) {
return null;
}
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null,
null, null);

if( cursor != null ){
int column_index =
cursor.getColumnIndexOrThrow(MediaStore.Images.Medi
a.DATA);
cursor.moveToFirst();
String path = cursor.getString(column_index);
cursor.close();
return path;
}
return uri.getPath();
}
public void onClick(View v) {
if (v == btn_pilih) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Sele
ct Picture"), SELECT_PICTURE);
}
else if(v == btn_kunci1)

{
kunci1 = new ArrayList();
Random rand = new Random();
Bitmap bitmap =
((BitmapDrawable)img.getDrawable()).getBitmap();
for(int i=0; i