asp.net实现的MD5加密和DES加解密算法类完整示例

2020-03-11 14:59ajunfly ASP.NET教程

这篇文章主要介绍了asp.net实现的MD5加密和DES加解密算法类,结合完整实例形式分析了asp.net实现MD5加密算法及DES加密和解密的相关技巧,需要的朋友可以参考下

本文实例讲述了asp.net实现的MD5加密和DES加解密算法类。分享给大家供大家参考，具体如下：

				?

									#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