The Code is successfully Encrypting the String As well as the Xml file from the assests folder.
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FilterWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import org.apache.commons.codec.binary.Base64;
public class EncryptionTest1 extends Activity {
EditText output, outputDecrypt;
EditText input;
String plainData = "";
String cipherText, decryptedText;
KeyGenerator keyGen;
SecretKey secretKey;
Cipher aesCipher;
FileOutputStream fos;
byte[] byteDataToEncrypt, byteCipherText, byteDecryptedText;
byte[] xmlStream;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_encryption_test1);
input = (EditText) findViewById(R.id.text_inputText1);
output = (EditText) findViewById(R.id.text_Result1);
outputDecrypt = (EditText) findViewById(R.id.text_decrypt_Result1);
Button btn_encrypt = (Button) findViewById(R.id.btn_encrpyt1);
btn_encrypt.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
try {
plainData = input.getText().toString();
System.out.println("input==>>" + plainData);
byte[] fileStreams = fileOpening("SaleReport.xml");
byte[] DataEncrypt = encrypt(fileStreams);
String DataDecrypt = decrypt(DataEncrypt);
System.out.println("Decrypted Text:===>>" + DataDecrypt);
outputDecrypt.setText(DataDecrypt);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
private byte[] fileOpening(String fileName) throws Exception {
InputStream is = getAssets().open(fileName);
int size = is.available();
xmlStream = new byte[size];
is.read(xmlStream);
System.out.println("xmlstream length==>>" + xmlStream.length);
return xmlStream;
}
private byte[] encrypt(byte[] xmlStream) throws Exception {
keyGen = KeyGenerator.getInstance("AES");
keyGen.init(128);
secretKey = keyGen.generateKey();
aesCipher = Cipher.getInstance("AES");
aesCipher.init(Cipher.ENCRYPT_MODE, secretKey);
// byteDataToEncrypt = plainData.getBytes();
byteCipherText = aesCipher.doFinal(xmlStream);
cipherText = new String(new Base64().encodeBase64(byteCipherText));
output.setText(cipherText);
System.out.println(cipherText);
return byteCipherText;
}
public String decrypt(byte[] DataEncrypt) throws Exception {
aesCipher.init(Cipher.DECRYPT_MODE, secretKey,
aesCipher.getParameters());
byteDecryptedText = aesCipher.doFinal(DataEncrypt);
decryptedText = new String(byteDecryptedText);
return decryptedText;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.encryption_test1, menu);
return true;
}
}