.NETは常用16、32ビットMD 5暗号化の2つの方法を生成する
1226 ワード
//MD5 , .NET 。
// MD5 :
// DVBBS MD5
//⑴: C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.Security.dll
public static string MD5(string Password,int Length)
{
if (Length!=16&&Length!=32) throw new System.ArgumentException("Length , 16 32 ");
System.Security.Cryptography.MD5CryptoServiceProvider MD5=new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] b= MD5.ComputeHash(System.Text.Encoding.UTF8.GetBytes(Password));
System.Text.StringBuilder StrB=new System.Text.StringBuilder();
for(int i=0;i<b.Length;i++)
StrB.Append(b[i].ToString("x").PadLeft(2,'0'));
if (Length==16)
return StrB.ToString(8,16);
else
return StrB.ToString();
}
//⑵: ASP。NET System.Web.Security FormsAuthentication
public string md5(string str,int code)
{
if(code==16) //16 MD5 ( 32 9~25 )
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str,"MD5").ToLower().Substring(8,16) ;
}
else//32
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str,"MD5").ToLower();
}
}