在传递的时候 将ID加密 获取时候 解密
使用 DES .
如:
///
<summary>
///
加密。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。
///
</summary>
public static 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
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);
}
return
ret.ToString();
}
/// <summary>
/// 解密。
///
</summary>
public static 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());
}
