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  • DES加密与解密MD5加密帮助类

     public class TrialHelper
        {
            //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
                {
                    if (string.IsNullOrEmpty(encryptKey) || encryptKey.Length < 8)
                    {
                        encryptKey = "winform01";
                    }
    
                    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
                {
                    if (string.IsNullOrEmpty(decryptKey) || decryptKey.Length < 8)
                    {
                        decryptKey = "winform01";
                    }
                    byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
                    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;
                }
            }
    
            /// <summary>
            /// MD5数据加密
            /// </summary>
            /// <param name="sDataIn">加密字段</param>
            /// <returns>加密后的字符串</returns>
            public static string GetMD5( string sDataIn )
            {
                System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
                byte[] bytValue, bytHash;
                bytValue = System.Text.Encoding.UTF8.GetBytes(sDataIn);
                bytHash = md5.ComputeHash(bytValue);
                md5.Clear();
                string sTemp = "";
                for (int i = 0; i < bytHash.Length; i++)
                {
                    sTemp += bytHash[i].ToString("x").PadLeft(2, '0');
                }
                return sTemp;
            }
        }

    调用:

                    //获取登录信息
                    loginRecord.Name = tbName.Text.Trim();
                    loginRecord.MD5Pwd = TrialHelper.GetMD5(tbPwd.Password); //保存到数据库MD5加密方式
                    loginRecord.Pwd = TrialHelper.EncryptDES(tbPwd.Password);//记住密码des加密方式,保存到本地
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  • 原文地址:https://www.cnblogs.com/qinyi173/p/7168940.html
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