System.Web.Security.HashPasswordForStoringInConfigFile()
public string md5(string str,int code)
{
if(code==16) //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) ;
}
if(code==32) //32位加密
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str,"MD5")
.ToLower();
}
return "00000000000000000000000000000000";
}
简单的使用:
//--导入所需要的包
using System.IO;
using System.Text;
using System.Security.Cryptography;
(1)MD5普通加密
//获取要加密的字段，并转化为Byte[]数组
byte[] data = System.Text.Encoding.Unicode
.GetBytes(TextBox1.Text.ToCharArray());
//建立加密服务
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
//加密Byte[]数组
byte[] result = md5.ComputeHash(data);
Label1.Text = "MD5普通加密：" + System.Text.Encoding.Unicode.GetString(result);
(2)MD5密码加密[常用]
Label1.Text = "MD5密码加密：" + System.Web.Security.FormsAuthentication
.HashPasswordForStoringInConfigFile(TextBox1.Text, "MD5");
(3)ASP.NET中加密与解密QueryString的方法[常用]
//加密
Response.Redirect("DetailInfo.aspx?id=" + Convert.ToBase64String
(System.Text.Encoding.Default.GetBytes("whaben")).Replace("+","%2B"));
//解密
string ID = System.Text.Encoding.Default.GetString
(Convert.FromBase64String(Request.QueryString["id"].ToString().Replace("%2B","+")));
二、DES加密及解密的算法[常用密钥算法
简单的使用:
//--导入所需要的包
using System.IO;
using System.Text;
using System.Security.Cryptography;
public static string Key = "DKMAB5DE";//加密密钥必须为8位
//加密算法
public static string MD5Encrypt(string pToEncrypt)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
des.Key = ASCIIEncoding.ASCII.GetBytes(Key);
des.IV = ASCIIEncoding.ASCII.GetBytes(Key);
MemoryStream ms = new 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);
}
ret.ToString();
return ret.ToString();
}
//解密算法
public static string MD5Decrypt(string pToDecrypt)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(Key);
des.IV = ASCIIEncoding.ASCII.GetBytes(Key);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.ASCII.GetString(ms.ToArray());
}
