AES加密（適用於java 和.net）

java代碼

 

    private static final String defaultCharset = "UTF-8";
    private static final String KEY_AES = "AES";
    private static final String KEY_MD5 = "MD5";
    public static final String key = "test";

 

    public static String encrypt(String data, String key) {

        return doAES(data, key, Cipher.ENCRYPT_MODE);
    }

     /**
     * 加解密
     *
     * @param data
     * @param key
     * @param mode
     * @return
     */
    private static String doAES(String data, String key, int mode) {

        try {
            if (StringUtils.isBlank(data) || StringUtils.isBlank(key)) {
                return null;
            }

            boolean encrypt = mode == Cipher.ENCRYPT_MODE;
            byte[] content;
            if (encrypt) {
                content = data.getBytes(defaultCharset);

            } else {
                content = Base64.decodeBase64(data.getBytes(defaultCharset));

            }
            // 建立密鑰
            SecretKeySpec keySpec = new SecretKeySpec(md5Digest.digest(key.getBytes(defaultCharset)), KEY_AES);
            // 建立密碼器
            Cipher cipher = Cipher.getInstance(KEY_AES);
            // 初始化
            cipher.init(mode, keySpec);

            byte[] result = cipher.doFinal(content);

            if (encrypt) {
                return new String(Base64.encodeBase64(result));

            } else {
                return new String(result, defaultCharset);

            }
        } catch (Exception e) {
            System.err.println("AES密文處理異常" + e);
            e.printStackTrace();
            
        }
        return null;
    }

 

 

對應的.Net代碼：

 

public static string AesEncrypt(string str, string key)
        {
            //祕鑰取md5
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] t = md5.ComputeHash(Encoding.UTF8.GetBytes(key));
            if (string.IsNullOrEmpty(str)) return null;
            Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);
            RijndaelManaged rm = new RijndaelManaged
            {
                Key = t,
                Mode = CipherMode.ECB,
                Padding = PaddingMode.PKCS7
            };
            ICryptoTransform cTransform = rm.CreateEncryptor();
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }

        public static string AesDecrypt(string str, string key)
        {
            if (string.IsNullOrEmpty(str)) return null;
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] t = md5.ComputeHash(Encoding.UTF8.GetBytes(key));
            Byte[] toEncryptArray = Convert.FromBase64String(str);
            RijndaelManaged rm = new RijndaelManaged
            {
                Key = t,
                Mode = CipherMode.ECB,
                Padding = PaddingMode.PKCS7
            };
            ICryptoTransform cTransform = rm.CreateDecryptor();
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return Encoding.UTF8.GetString(resultArray);
        }