private void BtnOk_Click(object sender, EventArgs e)
{
LoggedInUser = usersRepository.Get(tbUserName.Text);
if (LoggedInUser == null)
{
return;
}
ushort xorPwdPart1 = Byte.MinValue;
while (xorPwdPart1 <= Byte.MaxValue)
{
ushort xorPwdPart2 = Byte.MinValue;
while (xorPwdPart2 <= Byte.MaxValue)
{
var xorPassword = new byte[] { (byte)xorPwdPart1, (byte)xorPwdPart2 };
var byteXorCipher = new ByteXorCipher(xorPassword);
var saltedPasswordHash = Hash.GetSaltedPasswordHash(byteXorCipher, tbPassword.Text);
if (LoggedInUser.PasswordHash == saltedPasswordHash)
{
DialogResult = DialogResult.OK;
xorPwdPart1 = Byte.MaxValue;
break;
}
xorPwdPart2++;
}
xorPwdPart1++;
}
}
public static string GetSaltedPasswordHash(ByteXorCipher byteXorCipher, string password)
{
var bytes = Encoding.UTF8.GetBytes(password);
var encryptedBytes = byteXorCipher.Encrypt(bytes).ToArray();
var enryptedString = Encoding.UTF8.GetString(encryptedBytes);
return(Hash.SHA2_Hash(enryptedString));
}
public static string GetSaltedPasswordHash(string password)
{
var xorPassword = new byte[2];
var random = new Random(Environment.TickCount);
random.NextBytes(xorPassword);
var byteXorCipher = new ByteXorCipher(xorPassword);
return(GetSaltedPasswordHash(byteXorCipher, password));
}