示例#1
0
        /// <summary>
        /// 可选择使用 DES/RSA 双向解密函数
        /// </summary>
        /// <param name="str">待解密的字符串</param>
        /// <param name="privateKeyFilePath">非对称加密的私钥文件地址</param>
        /// <param name="keyValue">对称加密密钥(密钥长度能且只能是8个字母)</param>
        /// <returns>string</returns>
        public static string DecryptString(string str, string privateKeyFilePath, string keyValue)
        {
            string strResult = str;

            if (!StringsFunction.CheckValiable(str))
            {
                return(strResult);
            }


            // 判断非对称加密的私钥文件是否指定,指定则使用非对称加密算法(RSA)对其进行解密
            if (StringsFunction.CheckValiable(privateKeyFilePath))
            {
                string privateKey = FileOP.ReadFile(GetRealFile(privateKeyFilePath));

                RSACrypto rc = new RSACrypto();
                strResult = rc.RSADecrypt(privateKey, strResult);
            }


            // 判断是否指定了对称加密的密钥, 指定则采用 DES 对称加密算法进行解密
            if (StringsFunction.CheckValiable(keyValue))
            {
                DESCrypto dc = new DESCrypto();
                strResult = dc.DecryptString(strResult, keyValue);
            }

            return(strResult);
        }
示例#2
0
        /// <summary>
        /// 可选择使用 DES/RSA 双向加密函数
        /// </summary>
        /// <param name="str">待加密的字符串</param>
        /// <param name="keyValue">对称加密密钥(密钥长度能且只能是8个字母) </param>
        /// <param name="privateKeyFilePath">非对称加密的私钥文件地址</param>
        /// <returns>string</returns>
        public static string EncryptString(string str, string keyValue, string privateKeyFilePath)
        {
            string strResult = str;

            if (!StringsFunction.CheckValiable(str))
            {
                return(strResult);
            }


            // 判断是否指定了对称加密的密钥, 指定则采用 DES 对称加密算法进行加密
            if (StringsFunction.CheckValiable(keyValue))
            {
                DESCrypto dc = new DESCrypto();
                strResult = dc.EncryptString(strResult, keyValue, keyValue);
            }


            // 判断非对称加密的私钥文件是否指定,指定则使用非对称加密算法(RSA)对其进行二次加密
            if (StringsFunction.CheckValiable(privateKeyFilePath))
            {
                string          privateKey = FileOP.ReadFile(GetRealFile(privateKeyFilePath));
                Regex           r          = new Regex(@"<Modulus>(.*?)</Exponent>", RegexOptions.IgnoreCase | RegexOptions.Compiled);
                MatchCollection mc         = r.Matches(privateKey);
                string          publicKey  = "<RSAKeyValue><Modulus>" + mc[0].Groups[1].Value + "</Exponent></RSAKeyValue>";


                RSACrypto rc = new RSACrypto();
                strResult = rc.RSAEncrypt(publicKey, strResult);
            }

            return(strResult);
        }