Question
Please use the C# code provided below, to provide the following information: Add one more customer with your name and fake password and credit card
Please use the C# code provided below, to provide the following information:
Add one more customer with your name and fake password and credit card information.
Run the program.
Save or memorize the password you provided.
Observe the XML file created in the same folder, take a screenshot.
Observe in the .csproj file the library this App refers to.
Update that library to 100000 iterations, update the salt to any word of your choice of about the same size as current salt.
Change your Exercise02 code to store result into protected-customers2.xml.
Run the code using the same password.
Compare created XMLs. Write a short summary of this comparison. Provide screenshot of XML files
using System.Collections.Generic;
using System.IO;
using System.Xml;
using Packt.Shared;
using static System.Console;
using static System.IO.Path;
using static System.Environment;
namespace Exercise02
{
class Program
{
static void Main(string[] args)
{
WriteLine("You must enter a password to encrypt the sensitive data in the document.");
WriteLine("You must enter the same passord to decrypt the document later.");
Write("Password: ");
string password = ReadLine();
// define two example customers and
// note they have the same password
var customers = new List
{
new Customer
{
Name = "Bob Smith",
CreditCard = "1234-5678-9012-3456",
Password = "Pa$$w0rd",
},
new Customer
{
Name = "Leslie Knope",
CreditCard = "8002-5265-3400-2511",
Password = "Pa$$w0rd",
}
};
// define an XML file to write to
string xmlFile = Combine(CurrentDirectory,
"..", "protected-customers.xml");
var xmlWriter = XmlWriter.Create(xmlFile,
new XmlWriterSettings { Indent = true });
xmlWriter.WriteStartDocument();
xmlWriter.WriteStartElement("customers");
foreach (var customer in customers)
{
xmlWriter.WriteStartElement("customer");
xmlWriter.WriteElementString("name", customer.Name);
// to protect the credit card number we must encrypt it
xmlWriter.WriteElementString("creditcard",
Protector.Encrypt(customer.CreditCard, password));
// to protect the password we must salt and hash it
// and we must store the random salt used
var user = Protector.Register(customer.Name, customer.Password);
xmlWriter.WriteElementString("password", user.SaltedHashedPassword);
xmlWriter.WriteElementString("salt", user.Salt);
xmlWriter.WriteEndElement();
}
xmlWriter.WriteEndElement();
xmlWriter.WriteEndDocument();
xmlWriter.Close();
WriteLine();
WriteLine("Contents of the protected file:");
WriteLine();
WriteLine(File.ReadAllText(xmlFile));
}
}
}
REFERENCE CODE:
namespace Packt.Shared
{
public class Customer
{
public string Name { get; set; }
public string CreditCard { get; set; }
public string Password { get; set; }
public string Salt { get; set; }
}
}
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