AES 방식의 암호화/복호화

AES알고리즘

http://marcof.tistory.com/95

위키

http://ko.wikipedia.org/wiki/고급_암호화_표준

 /**
     * AES 방식의 암호화
     *
     * @param message
     * @return
     * @throws Exception
     */
    public static String encrypt(String message) throws Exception {

        // use key coss2
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), “AES”);

        // Instantiate the cipher
        Cipher cipher = Cipher.getInstance(“AES”);
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

        byte[] encrypted = cipher.doFinal(message.getBytes());
        return byteArrayToHex(encrypted);
    }

    /**
     * AES 방식의 복호화
     *
     * @param message
     * @return
     * @throws Exception
     */
    public static String decrypt(String encrypted) throws Exception {

        // use key coss2
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), “AES”);

        Cipher cipher = Cipher.getInstance(“AES”);
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
        byte[] original = cipher.doFinal(hexToByteArray(encrypted));
        String originalString = new String(original);
        return originalString;
    }
 
    public static void main(String[] args)
    {
        try {
            String encrypt = encrypt(“test1234″);
            System.out.println(“origin str = “+”test1234″);
            System.out.println(“encrypt str = “+encrypt);
         
            String decrypt = decrypt(encrypt);
            System.out.println(“decrypt str = “+decrypt);
         
        } catch (Exception e) {
            e.printStackTrace();
        }
     
    }

}