private static bool CheckPassword(string userName, string password)
{
if (!Users.ContainsKey(userName))
{
return(false);
}
User user = Users[userName];
string saltedHashedPassword = Protector.SaltAndHash(password, user.Salt);
return(saltedHashedPassword == user.SaltedHashedPassword);
}
private static User Register(string userName, string password)
{
RandomNumberGenerator rng = RandomNumberGenerator.Create();
var saltBytes = new byte[16];
rng.GetBytes(saltBytes);
string saltText = Convert.ToBase64String(saltBytes);
string saltedHashedPassword = Protector.SaltAndHash(password, saltText);
User user = new User
{
Name = userName,
Salt = saltText,
SaltedHashedPassword = saltedHashedPassword
};
Users.Add(user.Name, user);
return(user);
}
static void Main(string[] args)
{
Write("Enter your name: ");
string name = ReadLine();
Write("Enter your credit card number: ");
string creditCardNumber = ReadLine();
Write("Enter your password: "******"Customers", new XElement("Customer"));
XElement customer = customers.Element("Customer");
customer.Add(new XElement("name", name));
customer.Add(new XElement("creditcard", encryptedCreditCardNumber));
customer.Add(new XElement("password", saltedAndHashedPassword));
string xmlPath = Path.Combine(Environment.CurrentDirectory, Path.GetRandomFileName() + ".xml");
using (StreamWriter stream = File.CreateText(xmlPath))
{
stream.Write(customers.ToString());
}
using (StreamReader stream = File.OpenText(xmlPath))
{
string cusomersString = stream.ReadToEnd();
XDocument xml = XDocument.Parse(cusomersString);
encryptedCreditCardNumber = xml.Element("Customers").Element("Customer").Element("creditcard").Value;
creditCardNumber = Protector.Decrypt(encryptedCreditCardNumber, EncryptionPassword);
WriteLine($"Decrypted credit card number: {creditCardNumber}");
}
}
