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POBad data exception in C#
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copied!<p>i have a "bad data exception" when trying to decrypt a file using DES in C#.Any help would be great.here is my code:</p> <pre><code>namespace encrypte { public partial class Form1 : Form { public Form1() { InitializeComponent(); } static void EncryptFile(string sInputFilename, string sOutputFilename, string sKey) { FileStream fsInput = new FileStream(sInputFilename,FileMode.Open, FileAccess.Read); FileStream fsEncrypted = new FileStream(sOutputFilename,FileMode.Create,FileAccess.Write); DESCryptoServiceProvider DES = new DESCryptoServiceProvider(); DES.Mode = CipherMode.CFB; DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey); DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey); DES.Padding = PaddingMode.ISO10126; ICryptoTransform desencrypt = DES.CreateEncryptor(); CryptoStream cryptostream = new CryptoStream(fsEncrypted,desencrypt,CryptoStreamMode.Write); byte[] bytearrayinput = new byte[fsInput.Length - 1]; fsInput.Read(bytearrayinput, 0, bytearrayinput.Length); cryptostream.Write(bytearrayinput, 0, bytearrayinput.Length); cryptostream.FlushFinalBlock(); fsInput.Close(); fsEncrypted.Close(); } static void DecryptFile(string sInputFilename,string sOutputFilename,string sKey) { DESCryptoServiceProvider DES = new DESCryptoServiceProvider(); DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey); DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey); DES.Mode = CipherMode.CFB; DES.Padding = PaddingMode.ISO10126; FileStream fsread = new FileStream(sInputFilename,FileMode.Open,FileAccess.Read); ICryptoTransform desdecrypt = DES.CreateDecryptor(); CryptoStream cryptostreamDecr = new CryptoStream(fsread, desdecrypt,CryptoStreamMode.Read); StreamWriter fsDecrypted = new StreamWriter(sOutputFilename); fsDecrypted.Write(new StreamReader(cryptostreamDecr).ReadToEnd()); fsDecrypted.Flush(); fsDecrypted.Close(); } private void button1_Click(object sender, EventArgs e) { EncryptFile(@"E:\a.wmv", @"E:\b.wmv", "abcdefgh"); } private void button2_Click(object sender, EventArgs e) { DecryptFile(@"E:\b.wmv", @"E:\c.wmv", "abcdefgh"); } } } </code></pre> <p>i got an "bad data" exception in this line : fsDecrypted.Write(new StreamReader(cryptostreamDecr).ReadToEnd());</p>

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