AES CBC模式加密/解密

短命女 2022-09-21 11:39 185阅读 0赞

密钥：

/**
         * AES密钥
         */
        private final String m_sKey = "";
        
        /**
         * AES 加密向量
         */
        private final String m_sIV = "";

以下：

/**
         * <AES CBC模式加密>
         * <功能详细描述>
         * @param src 待加密的byte[]
         * @param key 密钥
         * @return
         * @throws Exception
         * @see [类、类#方法、类#成员]
         */
        private byte[] enCrypt(byte[] src, String key)
        {
            try
            {
                byte[] keyByte = key.getBytes();
                SecretKeySpec skeySpec = new SecretKeySpec(keyByte, "AES");
                
                // "算法/模式/补码方式"0102030405060708  
                Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
                
                // 使用CBC模式，需要一个向量iv，可增加加密算法的强度
                IvParameterSpec iv = new IvParameterSpec(m_sIV.getBytes());
                cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
                
                byte[] encrypted = cipher.doFinal(src);
                
                return encrypted;
            }
            catch (Exception e)
            {
                logger.debug(e.toString());
                return null;
            }
        }

解密：

/**
         * <解密>
         * <功能详细描述>
         * @param src
         * @param key
         * @return
         * @throws Exception
         * @see [类、类#方法、类#成员]
         */
        private byte[] deCrypt(byte[] src, String key)
        {
            try
            {
                byte[] raw = key.getBytes("ASCII");
                SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
                Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
                IvParameterSpec iv = new IvParameterSpec(m_sIV.getBytes());
                cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
                
                try
                {
                    byte[] original = cipher.doFinal(src);
                    
                    return original;
                }
                catch (Exception e)
                {
                    System.out.println(e.toString());
                    return null;
                }
            }
            catch (Exception ex)
            {
                System.out.println(ex.toString());
                return null;
            }
        }