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  • asp.net 中的 MD5加密和DES加解密算法类

    #region MD5算法
    public string md5(string str, int code)
    {

    if (code == 32) //32位加密
    {
    return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, “MD5″).ToLower();
    }
    else  //16位MD5加密(取32位加密的9~25字符)

    {
    return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, “MD5″).ToLower().Substring(8, 16);
    }
    }
    #endregion

    #region DESEncrypt DES加密
    // <summary>
    /// 进行DES加密。
    /// </summary>
    /// <param name=”pToEncrypt”>要加密的字符串。</param>
    /// <param name=”sKey”>密钥,且必须为8位。</param>
    /// <returns>以Base64格式返回的加密字符串。</returns>
    public string DESEncrypt(string pToEncrypt, string sKey)
    {
    using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
    {
    byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);
    des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
    des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
    System.IO.MemoryStream ms = new System.IO.MemoryStream();
    using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
    {
    cs.Write(inputByteArray, 0, inputByteArray.Length);
    cs.FlushFinalBlock();
    cs.Close();
    }
    string str = Convert.ToBase64String(ms.ToArray());
    ms.Close();
    return str;
    }
    }
    #endregion

    #region DESDecrypt DES解密
    /// <summary>
    /// 进行DES解密。
    /// </summary>
    /// <param name=”pToDecrypt”>要解密的以Base64</param>
    /// <param name=”sKey”>密钥,且必须为8位。</param>
    /// <returns>已解密的字符串。</returns>
    public string DESDecrypt(string pToDecrypt, string sKey)
    {
    byte[] inputByteArray = Convert.FromBase64String(pToDecrypt);
    using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
    {
    des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
    des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
    System.IO.MemoryStream ms = new System.IO.MemoryStream();
    using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
    {
    cs.Write(inputByteArray, 0, inputByteArray.Length);
    cs.FlushFinalBlock();
    cs.Close();
    }
    string str = Encoding.UTF8.GetString(ms.ToArray());
    ms.Close();
    return str;
    }
    }
    #endregion

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  • 原文地址:https://www.cnblogs.com/ajun/p/2318522.html
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