贴一个.net 的程序：
public static XmlTextWriter CreateEncryptWriter(string fileName, string passWord, ref FileStream fs)
{
try
{
if (! (passWord == null || passWord.Length < 5))
{
fs = new FileStream(fileName, FileMode.Create, FileAccess.Write);
DESCryptoServiceProvider cryptic = new DESCryptoServiceProvider();
cryptic.Key = ASCIIEncoding.ASCII.GetBytes(passWord);
cryptic.IV = ASCIIEncoding.ASCII.GetBytes(passWord);
CryptoStream crStream = new CryptoStream(fs, cryptic.CreateEncryptor(), CryptoStreamMode.Write);
return new XmlTextWriter(crStream, Encoding.ASCII);
}
else
{
return new XmlTextWriter(fileName, Encoding.ASCII);
}
}
catch { throw; }
}
public static XmlTextReader CreateDecryptReader(string fileName, string passWord, ref FileStream fs)
{
try
{
if (! (passWord == null || passWord.Length < 4))
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
DESCryptoServiceProvider cryptic = new DESCryptoServiceProvider();
cryptic.Key = ASCIIEncoding.ASCII.GetBytes(passWord);
cryptic.IV = ASCIIEncoding.ASCII.GetBytes(passWord);
CryptoStream crStream = new CryptoStream(fs, cryptic.CreateDecryptor(), CryptoStreamMode.Read);
return new XmlTextReader(crStream);
}
else
{
return new XmlTextReader(fileName);
}
}
catch { throw; }
}
c 下的程序复杂些，以后再贴。加密的作用在于传输过程，用于程序保护，有些牵强。这段C# 程序用于设备与 pc 传输过程中，对text 形式的 xml 格式数据的保护。
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