一些加密方法

 MD5 加密

using System.Security.Cryptography;



public static string encrypherment(string password)

        {

            string StrEncipherment = "";

            MD5 myMd5 = MD5.Create();

            byte[] mess = myMd5.ComputeHash(System.Text.Encoding.Default.GetBytes(password.ToCharArray()));

            for (int i = 0; i < mess.Length; i++)

                StrEncipherment += mess[i].ToString("x").PadLeft(2, '0');

            return StrEncipherment;

        }

 

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    /// 需要加密的字符串

     /// 偏移量

     /// sDataIn加密后的字符串

     public string GetMD5(string sDataIn, string move)

    {

         System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();

         byte[] bytValue, bytHash;

         bytValue = System.Text.Encoding.UTF8.GetBytes(move + sDataIn);

         bytHash = md5.ComputeHash(bytValue);

         md5.Clear();

         string sTemp = "";

         for (int i = 0; i <</SPAN> bytHash.Length; i++)

        {

             sTemp += bytHash[i].ToString("x").PadLeft(2, '0');

         }

         return sTemp;

 }

 textBox1.Text = this.GetMD5("123456","");

 结果: e10adc3949ba59abbe56e057f20f883e

其他用法

public class Md5Convert

{

     public static string GetMd5Str(string ConvertString)

    {

         MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();

         string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);

         //t2 = t2.Replace("-", "");

         return t2;

     }

 }

 textBox1.Text = Md5Convert.GetMd5Str("123456");

 结果: 49-BA-59-AB-BE-56-E0-57

 

 可逆的加密方法

public class Pass

    {

        //默认密钥向量

        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };



        /// <summary>

        /// DES加密字符串

        /// </summary>

        /// <param name="encryptString">待加密的字符串</param>

        /// <param name="encryptKey">加密密钥,要求为8位</param>

        /// <returns>加密成功返回加密后的字符串，失败返回源串</returns>

        public static string EncryptDES(string encryptString, string encryptKey)

        {

            try

            {

                byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));

                byte[] rgbIV = Keys;

                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);

                DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();

                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

                cStream.Write(inputByteArray, 0, inputByteArray.Length);

                cStream.FlushFinalBlock();

                return Convert.ToBase64String(mStream.ToArray());

            }

            catch

            {

                return encryptString;

            }

        }



        /// <summary>

        /// DES解密字符串

        /// </summary>

        /// <param name="decryptString">待解密的字符串</param>

        /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>

        /// <returns>解密成功返回解密后的字符串，失败返源串</returns>

        public static string DecryptDES(string decryptString, string decryptKey)

        {

            try

            {

                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);

                byte[] rgbIV = Keys;

                byte[] inputByteArray = Convert.FromBase64String(decryptString);

                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();

                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

                cStream.Write(inputByteArray, 0, inputByteArray.Length);

                cStream.FlushFinalBlock();

                return Encoding.UTF8.GetString(mStream.ToArray());

            }

            catch

            {

                return decryptString;

            }

        }

    }

调用：

Pass.EncryptDES("字符串", "azjmerbv");

Pass.DecryptDES("字符串", "azjmerbv");