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PORead/decrypt encrypted XML file and then process internally
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  1. PORead/decrypt encrypted XML file and then process internally
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    copied!<p>I have used this code in the past for writing and reading xml files. This time I want to write some encrypted generated XML and then read it and process it internally. I will post the code and perhaps someone can spot the problem.</p> <p>When I am testing the decrypt I have been able to output a file that has a continuous line of null character codes. The encrypted file seems to contain data and varys in size with different amounts of data.</p> <p>Please help, thanks!</p> <h2>Encrypt</h2> <pre><code>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(); </code></pre> <h2>DECRYPT</h2> <pre><code>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; </code></pre>
 

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