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");