c#语言的加密与解密

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c#语言的加密与解密

简介：c#语言的加密与解密,主要是针对字符串的加密与解密操作

核心操作就是把字符串变成二进制,将二进制数据编码为base 64 数字

转换成等效的8 位无符号整数数组,转换成UTF-8等操作之间的相互转换

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加密操作：

        /// <summary>        /// 加密         /// </summary>        /// <param name="strText">要加密字符</param>        /// <param name="strEncrKey">编码</param>        /// <returns>返回加密后字符串</returns>        /// <author>PengZhen</author>        /// <time>2012年1月4日10:10:55</time>        public static string DesEncrypt(string strText, string strEncrKey)        {            byte[] byKey = null;            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };            try            {                byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey.Substring(0, strEncrKey.Length));                DESCryptoServiceProvider des = new DESCryptoServiceProvider();                byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);                MemoryStream ms = new MemoryStream();                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);                cs.Write(inputByteArray, 0, inputByteArray.Length);                cs.FlushFinalBlock();                return Convert.ToBase64String(ms.ToArray());            }            catch (System.Exception error)            {                return "error:" + error.Message + "";            }        }

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解密操作：

        /// <summary>        /// 解密         /// </summary>        /// <param name="strText">要解密字符</param>        /// <param name="sDecrKey">编码</param>        /// <returns>返回加密后字符串</returns>        /// <author>PengZhen</author>        /// <time>2012年1月4日10:11:06</time>        public static string DesDecrypt(string strText, string sDecrKey)        {            byte[] byKey = null;            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };            byte[] inputByteArray = new Byte[strText.Length];            try            {                byKey = System.Text.Encoding.UTF8.GetBytes(sDecrKey.Substring(0, 8));                DESCryptoServiceProvider des = new DESCryptoServiceProvider();                inputByteArray = Convert.FromBase64String(strText);                MemoryStream ms = new MemoryStream();                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);                cs.Write(inputByteArray, 0, inputByteArray.Length);                cs.FlushFinalBlock();                System.Text.Encoding encoding = new System.Text.UTF8Encoding();                return encoding.GetString(ms.ToArray());            }            catch (System.Exception error)            {                return "error:" + error.Message + "";            }        }

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调用代码：

            Console.WriteLine("需要加密的字符串：123456");            Console.WriteLine("加密、解密的密码：password");                        string strDesEncrypt=DesEncrypt("123456", "password");            Console.WriteLine("加密后的字符串："+strDesEncrypt);            string strDesDecrypt = DesDecrypt(strDesEncrypt, "password");            Console.WriteLine("解密后的字符串：" + strDesDecrypt);            Console.ReadLine();

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输出效果图：