public void EncryptFile(PasswordSheet sheet)
{
FileStream stream = null;
PasswordDeriveBytes secretKey = null;
RijndaelManaged rijndaelCipher = null;
ICryptoTransform encryptor = null;
CryptoStream cryptoStream = null;
try
{
stream = new FileStream(_fileName, FileMode.OpenOrCreate, FileAccess.Write);
stream.SetLength(0);
secretKey = GetPasswordBytes();
rijndaelCipher = new RijndaelManaged();
encryptor = rijndaelCipher.CreateEncryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
// Defines a stream that links data streams to cryptographic transformations
cryptoStream = new CryptoStream(stream, encryptor, CryptoStreamMode.Write);
byte[] data = null;
using (var sheetStream = new MemoryStream())
{
XmlSerializer serializer = new XmlSerializer(typeof(PasswordSheet));
serializer.Serialize(sheetStream, sheet);
data = sheetStream.GetBuffer();
}
cryptoStream.Write(data, 0, data.Length);
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.Message);
}
finally
{
if (secretKey != null)
{
secretKey.Dispose();
}
if (rijndaelCipher != null)
{
rijndaelCipher.Dispose();
}
if (cryptoStream != null)
{
cryptoStream.Dispose();
}
}
}
public void EncryptFile(PasswordSheet sheet)
{
FileStream stream = null;
PasswordDeriveBytes secretKey = null;
RijndaelManaged rijndaelCipher = null;
ICryptoTransform encryptor = null;
CryptoStream cryptoStream = null;
try
{
stream = new FileStream(_fileName, FileMode.OpenOrCreate, FileAccess.Write);
stream.SetLength(0);
secretKey = GetPasswordBytes();
rijndaelCipher = new RijndaelManaged();
encryptor = rijndaelCipher.CreateEncryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
// Defines a stream that links data streams to cryptographic transformations
cryptoStream = new CryptoStream(stream, encryptor, CryptoStreamMode.Write);
byte[] data = null;
using (var sheetStream = new MemoryStream())
{
XmlSerializer serializer = new XmlSerializer(typeof(PasswordSheet));
serializer.Serialize(sheetStream, sheet);
data = sheetStream.GetBuffer();
}
cryptoStream.Write(data, 0, data.Length);
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.Message);
}
finally
{
if (secretKey != null)
{
secretKey.Dispose();
}
if (rijndaelCipher != null)
{
rijndaelCipher.Dispose();
}
if (cryptoStream != null)
{
cryptoStream.Dispose();
}
}
}
public PasswordSheet DecryptFile()
{
PasswordSheet decryptedData = null;
FileStream stream = null;
PasswordDeriveBytes secretKey = null;
RijndaelManaged rijndaelCipher = null;
ICryptoTransform decryptor = null;
CryptoStream cryptoStream = null;
try
{
rijndaelCipher = new RijndaelManaged();
// Making of the key for decryption
secretKey = GetPasswordBytes();
// Creates a symmetric Rijndael decryptor object.
decryptor = rijndaelCipher.CreateDecryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
stream = new FileStream(_fileName, FileMode.Open, FileAccess.Read);
// Defines the cryptographics stream for decryption.THe stream contains decrpted data
cryptoStream = new CryptoStream(stream, decryptor, CryptoStreamMode.Read);
XmlSerializer serializer = new XmlSerializer(typeof(PasswordSheet));
decryptedData = (PasswordSheet)serializer.Deserialize(cryptoStream);
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.Message);
}
finally
{
if (stream != null)
{
stream.Dispose();
}
if (secretKey != null)
{
secretKey.Dispose();
}
if (rijndaelCipher != null)
{
rijndaelCipher.Dispose();
}
if (cryptoStream != null)
{
cryptoStream.Dispose();
}
}
return(decryptedData);
}
