Java学习之3DES加解密

/**
 * CBC加密
 * @param key 密钥  3 * 8位
 * @param keyiv IV 8位
 * @param data 明文
 * @return Base64编码的密文
 * @throws Exception
 */
public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {
   Key deskey = null;
   DESedeKeySpec spec = new DESedeKeySpec(key);
   SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
   deskey = keyfactory.generateSecret(spec);

   Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
   IvParameterSpec ips = new IvParameterSpec(keyiv);
   cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
   byte[] bOut = cipher.doFinal(data);

   return bOut;
}
/**
 * 解密
 * @param key
 * @param keyiv
 * @param data
 * @return
 * @throws Exception
 */
public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {

   DESedeKeySpec dks = new DESedeKeySpec(key);
   SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("desede");
   SecretKey securekey = keyFactory.generateSecret(dks);

   // 解密
   Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
   IvParameterSpec ivp = new IvParameterSpec(keyiv);
   cipher.init(Cipher.DECRYPT_MODE, securekey, ivp);

   return cipher.doFinal(data);
}