How to decrypt the java code

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Hi,
Can anyone tell me how to decrypt the javaSE code. How to do this?
And please Post over here the Source code for JavaSE decrypt.

Thanks in Advance.

Posted 26-Mar-14 19:23pm

Member 10431549

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coolRahul_12 27-Mar-14 3:18am

Can u please tell few more details

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Member 10431549 · Answer 1 · 2014-03-26T21:21:00

Hi,
I got the answer .

package com.evora.practice;

import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class JavaDecrypt {

public static void main(String[] args) throws Exception {

KeyGenerator keygenerator = KeyGenerator.getInstance("Blowfish");
SecretKey secretkey = keygenerator.generateKey();

String plaintextString = "Test Password";
//Print the data as normal
System.out.println("In Normal Format :-"+plaintextString + " " + bytesToHex(plaintextString.getBytes()) + " " + Arrays.toString(plaintextString.getBytes()));

SecretKeySpec key = new SecretKeySpec(secretkey.getEncoded(), "Blowfish");
Cipher cipher = Cipher.getInstance("Blowfish");

cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encrypted = cipher.doFinal(plaintextString.getBytes());
String encryptedString = bytesToHex(encrypted);
//Print the data in Encrypted format
System.out.println("Encrypted data :-"+new String(encrypted) + " " + encryptedString + " " + Arrays.toString(encrypted));

cipher.init(Cipher.DECRYPT_MODE, key);
byte[] decrypted = cipher.doFinal(hexToBytes(encryptedString));
String decryptedString = bytesToHex(decrypted);
//Print the data in decrypted format
System.out.println("Decrypted data :-"+new String(decrypted) + " " + decryptedString + " " + Arrays.toString(decrypted));

}

public static byte[] hexToBytes(String str) {
if (str == null) {
return null;
} else if (str.length() < 2) {
return null;
} else {
int len = str.length() / 2;
byte[] buffer = new byte[len];
for (int i = 0; i < len; i++) {
buffer[i] = (byte) Integer.parseInt(str.substring(i * 2, i * 2 + 2), 16);
}
return buffer;
}

}

public static String bytesToHex(byte[] data) {
if (data == null) {
return null;
} else {
int len = data.length;
String str = "";
for (int i = 0; i < len; i++) {
if ((data[i] & 0xFF) < 16)
str = str + "0" + java.lang.Integer.toHexString(data[i] & 0xFF);
else
str = str + java.lang.Integer.toHexString(data[i] & 0xFF);
}
return str.toUpperCase();
}
}
}
Thanks.. :)