ciperDemo#cat CipherDemo.java

import java.security.*;

import javax.crypto.*;

import javax.crypto.spec.IvParameterSpec;

public class CipherDemo {

public static void main(String [] args) {

try {

String[] algorithm = {“AES”,”Blowfish”,”DES”};//”3DES”,”RSA”

String[] modes = {“ECB”,”CBC”,”CFB”,”OFB”,”OFB32?,”CFB8?};

String[] padding = {“PKCS5Padding”};//”NoPadding”

KeyGenerator kg = null;

Cipher cipher = null;

for(int i=0; i<algorithm.length; i++) {

SecretKey sk = KeyGenerator.getInstance(algorithm[i]).generateKey();

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

for(int k=0; k<padding.length; k++) {

cipher = Cipher.getInstance(algorithm[i]+”/”+modes[j]+”/”+padding[k]);

cipher.init(Cipher.ENCRYPT_MODE, sk);

printeParam(cipher);

System.out.println();

byte[] encryptedText = cipher.doFinal(“data”.getBytes());

if(cipher.getIV()!=null) {

cipher.init(Cipher.DECRYPT_MODE, sk, new IvParameterSpec(cipher.getIV()));

}else{

cipher.init(Cipher.DECRYPT_MODE, sk);

}

System.out.println(“Decrypted data:”+new String(cipher.doFinal(encryptedText)));

cipher = Cipher.getInstance(algorithm[i]+”/”+modes[j]+”/”+padding[k]);

System.out.println();

}

}

}

KeyGenerator kg1 = KeyGenerator.getInstance(“AES”);//3DES, Blowfish

Cipher cipher1 = Cipher.getInstance(“AES/ECB/PKCS5Padding”);//CBC,CFB,OFB

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

} catch (NoSuchPaddingException e) {

e.printStackTrace();

} catch (InvalidKeyException e) {

e.printStackTrace();

} catch (IllegalBlockSizeException e) {

e.printStackTrace();

} catch (BadPaddingException e) {

e.printStackTrace();

} catch (InvalidAlgorithmParameterException e) {

e.printStackTrace();

}

}

private static void printeParam(Cipher ciper) {

System.out.println(“ciper.getProvider(): “+ciper.getProvider());

System.out.println(“ciper.getAlgorithm(): “+ciper.getAlgorithm());

System.out.println(“ciper.getBlockSize(): “+ciper.getBlockSize());

System.out.println(“ciper.getParameters(): “+ciper.getParameters());

System.out.println(“ciper.getIV(): “+ciper.getIV());

}

}