读取/解密加密的XML文件，然后进行内部处理

Question

我在过去使用过这段代码来编写和读取xml文件。这次我想编写一些加密生成的XML，然后读取它并在内部进行处理。我会发布代码，也许有人能发现问题。

当我测试解密时，我已经能够输出一个有连续行空字符代码的文件。加密文件似乎包含数据和不同数据量的大小变量。

请帮忙，谢谢！

MemoryStream ms = new MemoryStream();
XmlTextWriter xmlwriter = new XmlTextWriter(ms,Encoding.UTF8);
FileStream EncryptedFileStream = new FileStream(file, FileMode.Create, FileAccess.Write);

DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes("AAAAAAAA");
DES.IV = ASCIIEncoding.ASCII.GetBytes("AAAAAAAA");

ICryptoTransform desEncrypt = DES.CreateEncryptor();
CryptoStream cryptostream = new CryptoStream(EncryptedFileStream, desEncrypt, CryptoStreamMode.Write);

/*create working and tested XML data here*/


byte[] bytearray = new byte[ms.Length];


ms.Read(bytearray, 0, bytearray.Length);
cryptostream.Write(bytearray, 0, bytearray.Length);

cryptostream.Close();

EncryptedFileStream.Close();

xmlwriter.Close();
ms.Flush();
ms.Close();

MemoryStream ms = new MemoryStream();
StreamWriter swDecrypt = new StreamWriter(ms);

DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes("AAAAAAAA");
DES.IV = ASCIIEncoding.ASCII.GetBytes("AAAAAAAA");

ICryptoTransform desDecrypt = DES.CreateDecryptor();

FileStream fsDecrypt = new FileStream(mstrIndexFile, FileMode.Open, FileAccess.Read);

CryptoStream cryptostreamDecr = new CryptoStream(fsDecrypt, desDecrypt, CryptoStreamMode.Read);

swDecrypt.Write(new StreamReader(cryptostreamDecr).ReadToEnd());
swDecrypt.Flush();
ms.Position = 0;

Answer 1

使用当前的体系结构，您需要使用刚刚填充了数据的MemoryStream（不要忘记将其位置重置为零并清除任何挂起的写操作）

//I am currently stuck on this point.
swDecrypt.Flush();
ms.Position=0;
XmlTextReader lxmlReader = new XmlTextReader(ms);

不过，我的感觉是，这里不需要MemoryStream。相反,只需将CryptoStream提供给XMLTextReader：

CryptoStream cryptostreamDecr = new CryptoStream(.....
XmlTextReader lxmlReader = new XmlTextReader(cryptostreamDecr);