dotnet security: Hello everyone,
I am using the following class to encrypt/decrypt a string using C# in .NET
Framework 2.0. When I call decrypt (in testing, straight after calling
encrypt) I get a 'Bad Data' Cryptographic Exception.

Can anyone offer any advice as to where I may be going wrong?

Thanks in advance.

public class CryptoUtil
{
private static byte[] KEY_64 = { 12, 58, 77, 34, 92, 28, 73, 41 };
private static byte[] IV_64 = { 48, 67, 82, 10, 78, 63, 91, 25 };

public CryptoUtil()
{
}

public static string encrypt(string sPlainText)
{
if (sPlainText != "")
{
DESCryptoServiceProvider dcsp = new DESCryptoServiceProvider();
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms,
dcsp.CreateEncryptor(KEY_64, IV_64),
CryptoStreamMode.Write);
StreamWriter sw = new StreamWriter(cs);

sw.Write(sPlainText);
sw.Flush();
cs.FlushFinalBlock();
ms.Flush();

return Convert.ToBase64String(ms.GetBuffer(), 0,
(int)(ms.Length));
}
return "";
}

public static string decrypt(string sCypherText)
{
if (sCypherText != "")
{
DESCryptoServiceProvider dcsp = new DESCryptoServiceProvider();

byte[] buffer = Convert.FromBase64String(sCypherText);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms,
dcsp.CreateDecryptor(KEY_64, IV_64),
CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cs);

return sr.ReadToEnd();
}
return "";
}

Thank you very much Pieter.
Sometimes the simplest answers are staring you right in the face! I spent
hours looking at this, and still missed it!!

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