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  • 文本加密和解密

    /// <summary>
    /// DES加密/解密类。
    /// </summary>
    public class DESEncrypt
    {
    public DESEncrypt()
    {
    }

    #region ========加密========

    /// <summary>
    /// 加密
    /// </summary>
    /// <param name="Text"></param>
    /// <returns></returns>
    public static string Encrypt(string Text)
    {
    return Encrypt(Text,"jiamiparamer");
    }
    /// <summary>
    /// 加密数据
    /// </summary>
    /// <param name="Text"></param>
    /// <param name="sKey"></param>
    /// <returns></returns>
    public static string Encrypt(string Text,string sKey)
    {
    DESCryptoServiceProvider des = new DESCryptoServiceProvider();
    byte[] inputByteArray;
    inputByteArray=Encoding.Default.GetBytes(Text);
    des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
    des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
    System.IO.MemoryStream ms=new System.IO.MemoryStream();
    CryptoStream cs=new CryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write);
    cs.Write(inputByteArray,0,inputByteArray.Length);
    cs.FlushFinalBlock();
    StringBuilder ret=new StringBuilder();
    foreach( byte b in ms.ToArray())
    {
    ret.AppendFormat("{0:X2}",b);
    }
    return ret.ToString();
    }

    #endregion

    #region ========解密========


    /// <summary>
    /// 解密
    /// </summary>
    /// <param name="Text"></param>
    /// <returns></returns>
    public static string Decrypt(string Text)
    {
    return Decrypt(Text,"litianping");
    }
    /// <summary>
    /// 解密数据
    /// </summary>
    /// <param name="Text"></param>
    /// <param name="sKey"></param>
    /// <returns></returns>
    public static string Decrypt(string Text,string sKey)
    {
    DESCryptoServiceProvider des = new DESCryptoServiceProvider();
    int len;
    len=Text.Length/2;
    byte[] inputByteArray = new byte[len];
    int x,i;
    for(x=0;x<len;x++)
    {
    i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
    inputByteArray[x]=(byte)i;
    }
    des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
    des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
    System.IO.MemoryStream ms=new System.IO.MemoryStream();
    CryptoStream cs=new CryptoStream(ms,des.CreateDecryptor(),CryptoStreamMode.Write);
    cs.Write(inputByteArray,0,inputByteArray.Length);
    cs.FlushFinalBlock();
    return Encoding.Default.GetString(ms.ToArray());
    }

    #endregion


    }

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  • 原文地址:https://www.cnblogs.com/jameslif/p/2956124.html
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