//或?者?下?面?的?另?一?个?程?序?代?码?：?
using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;
public class Test
{
//加?密?
public string DesEncrypt(string strText, string strEncrKey)
{
byte[] byKey=null;
byte[] IV= {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};
try
{
byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey.Substring(0,8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write) ;
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Convert.ToBase64String(ms.ToArray());
}
catch(System.Exception error)
{
MessageBox.Show(error.Message);
return "error:" +error.Message+"\r";
}
}
//解?密?函?数?
public string DesDecrypt(string strText,string sDecrKey)
{
byte[] byKey = null;
byte[] IV= {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};
byte[] inputByteArray = new Byte[strText.Length];
try
{
byKey = System.Text.Encoding.UTF8.GetBytes(sDecrKey.Substring(0,8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(strText);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = new System.Text.UTF8Encoding();
return encoding.GetString(ms.ToArray());
}
catch(System.Exception error)
{
MessageBox.Show(error.Message);
return "error:"+error.Message+"\r";
}
}
public class EncryptStringDES
{
public static void Main(String[] args) {
if (args.Length < 1) {
Console.WriteLine("Usage: des_demo ", args[0]);
return;
}
// 使?用?UTF8函?数?加?密?输?入?参?数?
UTF8Encoding utf8Encoding = new UTF8Encoding();
byte[] inputByteArray = utf8Encoding.GetBytes(args[0].ToCharArray());
// 方?式?一?：?调?用?默?认?的?DES实?现?方?法?DES_CSP.
DES des = DES.Create();
// 方?式?二?：?直?接?使?用?DES_CSP()实?现?DES的?实?体?
//DES_CSP DES = new DES_CSP();
// 初?始?化?DES加?密?的?密?钥?和?一?个?随?机?的?、?比?特?的?初?始?化?向?量?(IV)
Byte[] key = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef};
Byte[] IV = {0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef};
des.Key = key;
des.IV = IV;
// 建?立?加?密?流?
SymmetricStreamEncryptor sse = des.CreateEncryptor();
// 使?用?CryptoMemoryStream方?法?获?取?加?密?过?程?的?输?出?
CryptoMemoryStream cms = new CryptoMemoryStream();
// 将?SymmetricStreamEncryptor流?中?的?加?密?数?据?输?出?到?CryptoMemoryStream中?
sse.SetSink(cms);
// 加?密?完?毕?，?将?结?果?输?出?到?控?制?台?
sse.Write(inputByteArray);
sse.CloseStream();
// 获?取?加?密?数?据?
byte[] encryptedData = cms.Data;
// 输?出?加?密?后?结?果?
Console.WriteLine("加?密?结?果?：?");
for (int i = 0; i < encryptedData.Length; i++) {
Console.Write("{0:X2} ",encryptedData[i]);
}
Console.WriteLine();
//上?面?演?示?了?如?何?进?行?加?密?，?下?面?演?示?如?何?进?行?解?密?
SymmetricStreamDecryptor ssd = des.CreateDecryptor();
cms = new CryptoMemoryStream();
ssd.SetSink(cms);
ssd.Write(encryptedData);
ssd.CloseStream();
byte[] decryptedData = cms.Data;
char[] decryptedCharArray = utf8Encoding.GetChars(decryptedData);
Console.WriteLine("解?密?后?数?据?：?");
Console.Write(decryptedCharArray);
Console.WriteLine();
}
}
