//private method which writes the eMart data onto a file after encrypting it
private void ToFile(E_Mart_Store p, string password, string file)
{
byte[] passwordBytes = StrToByte(password);
byte[] bytes = serialize.SerializeObjectToByteArray(p);
byte[] encryptedBytes = aes.AES_Encrypt(bytes, passwordBytes);
ByteToFile(encryptedBytes, file);
}
//private method which reads the encrypted data from file, decrypts it and enters it into eMart variable
private E_Mart_Store FromFile(string file, string password)
{
byte[] passwordBytes = StrToByte(password);
byte[] fileInBytes = FileToByte(file);
byte[] decryptedFileInBytes = aes.AES_Decrypt(fileInBytes, passwordBytes);
E_Mart_Store p = serialize.DeserializeByteArrayToObject(decryptedFileInBytes);
return(p);
}
/*
* input: E_Mart_Store object
* output: byte array
* action: serialization
*/
public byte[] SerializeObjectToByteArray(E_Mart_Store p)
{
if (p == null)
{
throw new ArgumentNullException();
}
XmlSerializer serializer = new XmlSerializer(typeof(E_Mart_Store));
using (MemoryStream memoryStream = new MemoryStream())
{
using (XmlWriter xmlWriter = XmlWriter.Create(memoryStream))
{
serializer.Serialize(xmlWriter, p); //writing the serialized data onto memoryStream
return(memoryStream.ToArray()); //returns an memory string converted to a byteArray
}
}
}
public static void isEncyptionOK()
{
IDAL adal = new LINQ_DAL();
IBL abl = new E_Mart_BL(adal);
Department d1 = new Department("Department 1");
d1.DepartmentID = 1;
User user = new User("Naharda", "Kawabanga");
Employee emp = new Employee(305, "Yair", "LAnd", 1, 50000.5, "Male", -1);
Product prod = new Product("Banana", "Food", 1, 1, InStock.True, 300, 2.5, 100);
ClubMember clu = new ClubMember("2516", "Googi", "Sheldi", "Male", "08/10/1989");
clu.MemberID = 1;
Receipt rec = new Receipt();
ProductSale ps = new ProductSale(prod, 3);
rec.addProductSale(ps);
Transaction tranc = new Transaction(rec, "Cash");
tranc.TransactionID = 1;
E_Mart_Store e = new E_Mart_Store();
e.addClubMember(clu);
e.addDepartment(d1);
e.addEmployee(emp);
e.addProduct(prod);
e.addTransaction(tranc);
e.addUser(user);
Serialize b = new Serialize();
AES aes = new AES();
String s1 = "password";
byte[] a = b.SerializeObjectToByteArray(e);
byte[] password = new byte[s1.Length * sizeof(char)];
System.Buffer.BlockCopy(s1.ToCharArray(), 0, password, 0, password.Length);
byte[] ans = aes.AES_Encrypt(a, password);
Assert.IsFalse(ByteArrayCompare(a, ans));
byte[] ans2 = aes.AES_Decrypt(ans, password);
Assert.IsTrue(ByteArrayCompare(ans2, a));
}
//loads data from file to this.eMart variable and then enitializes the rest
public void loadDataFromFile()
{
this.eMart = FromFile(filename, password);
enitializeLinqDal();
//toConsole(this.eMart);
}
