使用DES对称加密代码,可以加密码,可以加密解密,支持中文 ---------------------------------------------------------- //名称空间 using System; using System.Security.Cryptography; using System.IO; using System.Text;
//方法 //加密方法 public string Encrypt(string pToEncrypt, string sKey) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); //把字符串放到byte数组中 //原来使用的UTF8编码,我改成Unicode编码了,不行 byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt); //byte[] inputByteArray=Encoding.Unicode.GetBytes(pToEncrypt);
//建立加密对象的密钥和偏移量 //原文使用ASCIIEncoding.ASCII方法的GetBytes方法 //使得输入密码必须输入英文文本 des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(),CryptoStreamMode.Write); //Write the byte array into the crypto stream //(It will end up in the memory stream) cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); //Get the data back from the memory stream, and into a string StringBuilder ret = new StringBuilder(); foreach(byte b in ms.ToArray()) { //Format as hex ret.AppendFormat("{0:X2}", b); } ret.ToString(); return ret.ToString(); }
//解密方法 public string Decrypt(string pToDecrypt, string sKey) { DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//Put the input string into the byte array 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; }
//建立加密对象的密钥和偏移量,此值重要,不能修改 des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(),CryptoStreamMode.Write); //Flush the data through the crypto stream into the memory stream cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock();
//Get the decrypted data back from the memory stream //建立StringBuild对象,CreateDecrypt使用的是流对象,必须把解密后的文本变成流对象 StringBuilder ret = new StringBuilder();
估计是解密解得不对,但在2000上是好好的。大家不妨编译一下,
然后再2000和XP运行比较。
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在B/S中可以用
strPasswd = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(strPasswd, "MD5")strPasswd1 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(strPasswd, "SHA1")
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//名称空间
using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;
//方法
//加密方法
public string Encrypt(string pToEncrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//把字符串放到byte数组中
//原来使用的UTF8编码,我改成Unicode编码了,不行
byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
//byte[] inputByteArray=Encoding.Unicode.GetBytes(pToEncrypt);
//建立加密对象的密钥和偏移量
//原文使用ASCIIEncoding.ASCII方法的GetBytes方法
//使得输入密码必须输入英文文本
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(),CryptoStreamMode.Write);
//Write the byte array into the crypto stream
//(It will end up in the memory stream)
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//Get the data back from the memory stream, and into a string
StringBuilder ret = new StringBuilder();
foreach(byte b in ms.ToArray())
{
//Format as hex
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return ret.ToString();
}
//解密方法
public string Decrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//Put the input string into the byte array
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;
}
//建立加密对象的密钥和偏移量,此值重要,不能修改
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(),CryptoStreamMode.Write);
//Flush the data through the crypto stream into the memory stream
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//Get the decrypted data back from the memory stream
//建立StringBuild对象,CreateDecrypt使用的是流对象,必须把解密后的文本变成流对象
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
//-------代码完毕--------------------
注意:sKey输入密码的时候,必须使用英文字符,区分大小写,且字符数量是8个,不能多也不能少,否则出错。
本人使用Windows2000 Server .Net Framework SP3 ,VS.Net下在asp.net下使用成功,加密解密正常!