public void ExecuteEncrypt(string FileName, string password)
{
byte[] passwordBytes = new UnicodeEncoding().GetBytes(password);
byte[] keyBytes;
FileStream ReadFile = new FileStream(FileName, FileMode.Open, FileAccess.Read);
RijndaelManaged Encrypter = new RijndaelManaged();
GenerateIV generateIV = new GenerateIV(password);
keyBytes = generateIV.Get256bitIV();
Encrypter.BlockSize = keyBytes.Length * 8;
FileStream WriteEncrypted = new FileStream(GetWithoutExtension(FileName) + ".LCK", FileMode.Create, FileAccess.Write);
CryptoStream EncryptStream = new CryptoStream(WriteEncrypted, Encrypter.CreateEncryptor(passwordBytes, keyBytes), CryptoStreamMode.Write);
for (int index = 0; index < ReadFile.Length; ++index)
{
byte data = (byte)ReadFile.ReadByte();
EncryptStream.WriteByte(data);
}
EncryptStream.Close();
WriteEncrypted.Close();
ReadFile.Close();
}
public void DecryptFile()
{
#region Code for decrypting a file
byte[] PasswordBytes = new UnicodeEncoding().GetBytes(Password.ToCharArray());
byte[] KeyBytes;
RijndaelManaged Crypter = new RijndaelManaged();
KeyBytes = new GenerateIV(Password).Get256bitIV();
Crypter.BlockSize = KeyBytes.Length * 8;
FileStream ReadFile = new FileStream(GetWithoutExtension(FileName) + ".LCK", FileMode.Open, FileAccess.Read);
FileStream WriteFile = new FileStream(GetWithoutExtension(FileName) + "_DEC.LCK", FileMode.Create, FileAccess.Write);
try
{
CryptoStream WriteDecrypted = new CryptoStream(WriteFile, Crypter.CreateDecryptor(PasswordBytes, KeyBytes), CryptoStreamMode.Write);
for (int index = 0; index < ReadFile.Length; ++index)
{
byte data = (byte)ReadFile.ReadByte();
WriteDecrypted.WriteByte(data);
}
WriteDecrypted.Close();
}
catch (Exception LoginFailure)
{
throw new ApplicationException("Authentication Exception");
}
finally
{
WriteFile.Close();
ReadFile.Close();
}
#endregion
}
