Because I always need to do this for passwords in files and
various utilities I thought I would post the code.
Note: it is more secure to encrypt one way (cryptographic
hashing) this is for simple no hassle cases.
package za.co.test.common.util;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class EncryptionUtil {
private static final byte[] SECRET_KEY = "TESTKEY2013StormersRugby".getBytes();
public static byte[] encryptToByteArray(String input)
throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, NoSuchPaddingException {
Key key = generateKey();
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] inputBytes = input.getBytes();
inputBytes = cipher.doFinal(inputBytes);
return Base64.encodeBase64(inputBytes);
}
public static String decryptByteArray(byte[] encryptionBytes)
throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, NoSuchPaddingException {
Key key = generateKey();
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] recoveredBytes = Base64.decodeBase64(encryptionBytes);
recoveredBytes = cipher.doFinal(recoveredBytes);
String recovered = new String(recoveredBytes);
return recovered;
}
public static String encrypt(String input)
throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, NoSuchPaddingException,
UnsupportedEncodingException {
byte[] inputBytes = encryptToByteArray(input);
return new String(inputBytes);
}
public static String decrypt(String encryptionBytes)
throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, NoSuchPaddingException {
return decryptByteArray(encryptionBytes.getBytes());
}
private static Key generateKey() {
Key key = new SecretKeySpec(SECRET_KEY, ALGORITHM);
return key;
}
public static void main(String[] args)
throws Exception {
if (args == null || args.length < 1 || args[0] == null || args[0].length() < 1) {
throw new NullPointerException("Please enter a password. Usage : java za.co.test.common.util.EncryptionUtil ");
}
String password = args[0];
String pwd = EncryptionUtil.encrypt(password);
System.out.println("The encrypted password is ---> " + pwd);
}
}
Comments
Post a Comment