HashPasswordForStoringInConfigFile中的Md5算法并非常用的Md5算法
本来我也以为System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile中的MD5和常用的一样
一看MSDN的解释,原来是
Given a password and a string identifying the hash type, this routine produces a hash password suitable for storing in a configuration file.
大家不要用HashPasswordForStoringInConfigFile取得的加密保存在数据库中,这个只适合保存在配置文件中,
在需要验证的时候,会自动根据加密方式验证。
<script language="C#" runat="server">
string qswhMD5(string str){
/************qiushuiwuhen(2002-9-27)***************/
byte[] b=System.Text.Encoding.Default.GetBytes(str);
b=new System.Security.Cryptography.MD5CryptoServiceProvider().ComputeHash(b);
string ret="";
for(int i=0;i<b.Length;i++)
ret+=b[i].ToString("x").PadLeft(2,'0');
return ret;
}
public void encryptString(Object sender, EventArgs e)
{
myMD5.Text=qswhMD5(txtClear.Text);
MD5.Text =System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(txtClear.Text, "MD5") ;
}
</script>
<body onload=document.all.txtClear.select();>
<form runat="server">
明文:<asp:Textbox id="txtClear" runat="server" />
<asp:Button runat="server" text="Md5摘要" onClick="encryptString" ID="Button1" />
<br/>通常用的 MD5:
<br/><asp:label id="myMD5" runat="server" /> <br/>
<br/>HashPasswordForStoringInConfigFile中的 MD5:
<br/><asp:label id="MD5" runat="server" />
</form>
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环境:vs.net2005/sql server2000/xp测试通过
1.MD5 16位加密实例
using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
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namespace md5
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine(UserMd5("8"));
Console.WriteLine(GetMd5Str("8"));
}
/**//// <summary>
/// MD5 16位加密
/// </summary>
/// <param name="ConvertString"></param>
/// <returns></returns>
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;
}
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/**//// <summary>
/// MD5 32位加密
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
static string UserMd5(string str)
{
string cl = str;
string pwd = "";
MD5 md5 = MD5.Create();//实例化一个md5对像
// 加密后是一个字节类型的数组,这里要注意编码UTF8/Unicode等的选择
byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));
// 通过使用循环,将字节类型的数组转换为字符串,此字符串是常规字符格式化所得
for (int i = 0; i < s.Length; i++)
{
// 将得到的字符串使用十六进制类型格式。格式后的字符是小写的字母,如果使用大写(X)则格式后的字符是大写字符
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pwd = pwd + s[i].ToString("X");
}
return pwd;
}
}
}
一看MSDN的解释,原来是
Given a password and a string identifying the hash type, this routine produces a hash password suitable for storing in a configuration file.
大家不要用HashPasswordForStoringInConfigFile取得的加密保存在数据库中,这个只适合保存在配置文件中,
在需要验证的时候,会自动根据加密方式验证。
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