public static string DecryptPass(byte[] array)
{
CryptoDES objCryptoDES = new CryptoDES();
objCryptoDES.Initialize();
string info = ByteArrayToStr(array);
info = objCryptoDES.DESSelfDecrypt(info);
return(info);
}
public static void saveData(List <Term> termTable)
{
StreamWriter termFile = new StreamWriter("term.txt");
CryptoSymmetric crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
foreach (var item in termTable)
{
var tempString = item.TermNum.ToString() + "\t" + item.TermName.ToString();
termFile.WriteLine(crypto.Encrypt(tempString));
}
termFile.Close();
}
public static void saveData(List <PreQuisite> Table)
{
StreamWriter PreqFile = new StreamWriter("prerequisite.txt");
CryptoSymmetric crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
foreach (var item in Table)
{
var tempString = item.Course1.Id.ToString() + "\t" + item.Course2.Id.ToString() + "\t" + item.Status.ToString();
PreqFile.WriteLine(crypto.Encrypt(tempString));
}
PreqFile.Close();
}
public static void saveData(List <Clerk> ClerkTable)
{
StreamWriter ClerkFile = new StreamWriter("clerk.txt");
CryptoSymmetric crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
foreach (var item in ClerkTable)
{
var tempString = item.Id.ToString() + "\t" + item.FirstName.ToString() + "\t" + item.LastName.ToString() + "\t" + item.Password.ToString();
ClerkFile.WriteLine(crypto.Encrypt(tempString));
}
ClerkFile.Close();
}
public static void saveData(List <Course> CourseTable)
{
StreamWriter CourseFile = new StreamWriter("course.txt");
CryptoSymmetric crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
foreach (var item in CourseTable)
{
var tempString = String.Format("{0}\t{1}\t{2}\t{3}", item.Id, item.ECT, item.Name, item.type);
CourseFile.WriteLine(crypto.Encrypt(tempString));
}
CourseFile.Close();
}
public static void saveData(List <TermCourseStudent> termCourseStudentTable)
{
StreamWriter termCourseStudentFile = new StreamWriter("termcoursestudent.txt");
CryptoSymmetric crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
foreach (var item in termCourseStudentTable)
{
var tempString = item.Mark.ToString() + "\t" + item.AnswerToObjection.ToString() + "\t" + item.ObjectionToMark.ToString() + "\t" + item.TermCourse.Id.ToString() + "\t" + item.Student.Id.ToString() + "\t" + item.Status.ToString();
termCourseStudentFile.WriteLine(crypto.Encrypt(tempString));
}
termCourseStudentFile.Close();
}
public static void saveData(List <TermCourse> termCourseTable)
{
StreamWriter file = new StreamWriter("termcourse.txt");
CryptoSymmetric crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
foreach (var item in termCourseTable)
{
var tempString = item.Id.ToString() + "\t" + item.Course.Id.ToString() + "\t" + item.Term.TermNum.ToString() + "\t" + item.Teacher.Id.ToString() + "\t" + item.Time + "\t" + item.Place + "\t" + item.Capacity;
file.WriteLine(crypto.Encrypt(tempString));
}
file.Close();
}
public static void saveData(List <Student> studentTable)
{
StreamWriter file = new StreamWriter("student.txt");
CryptoSymmetric crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
foreach (var item in studentTable)
{
var tempString = item.Id.ToString() + "\t" + item.FirstName.ToString() + "\t" + item.LastName.ToString() + "\t" + item.Password.ToString() + "\t" + item.EntranceYear;
file.WriteLine(crypto.Encrypt(tempString));
}
file.Close();
}
public static byte[] EncryptPass(string pass)
{
try
{
CryptoDES objCryptoDES = new CryptoDES();
objCryptoDES.Initialize();
string encryptSTR = objCryptoDES.DESSelfEncrypt(pass);
byte[] contents = StrToByteArray(encryptSTR);
return(contents);
}
catch (Exception oEx)
{
LoggingHelper.ShowMessage(oEx);
return(null);
}
}
public void CryptoDES_RandomIV_Test()
{
//Arrange
byte[] key = { 158, 23, 64, 96, 57, 225, 36, 85 };
CryptoSymmetric crypto = new CryptoDES(key);
string originalMessage = "I love cryptography and DES with a 64-bits key";
string encryptedMessage = crypto.Encrypt(originalMessage);
//Act
string decryptedMessage = crypto.Decrypt(encryptedMessage);
//Assert
Assert.AreNotEqual(originalMessage, encryptedMessage);
Assert.AreEqual(originalMessage, decryptedMessage);
}
public void CryptoDES_FixedIV_Test()
{
//Arrange
byte[] key = { 158, 23, 64, 96, 57, 225, 36, 85 };
byte[] iv = { 63, 208, 159, 46, 37, 77, 1, 59 };
CryptoSymmetric crypto = new CryptoDES(key);
crypto.SetIV(iv);
string originalMessage = "I love cryptography and DES with a 64-bits key";
string encryptedMessage = crypto.Encrypt(originalMessage);
//Act
string decryptedMessage = crypto.Decrypt(encryptedMessage);
//Assert
Assert.AreNotEqual(originalMessage, encryptedMessage);
Assert.AreEqual(originalMessage, decryptedMessage);
}
public static string DecryptPass(byte[] array)
{
CryptoDES objCryptoDES = new CryptoDES();
objCryptoDES.Initialize();
string info = ByteArrayToStr(array);
info = objCryptoDES.DESSelfDecrypt(info);
return info;
}
public static byte[] EncryptPass(string pass)
{
try
{
CryptoDES objCryptoDES = new CryptoDES();
objCryptoDES.Initialize();
string encryptSTR = objCryptoDES.DESSelfEncrypt(pass);
byte[] contents = StrToByteArray(encryptSTR);
return contents;
}
catch (Exception oEx)
{
LoggingHelper.ShowMessage(oEx);
return null;
}
}
public static void loadData()
{
string line = "";
StreamReader studentFile = new StreamReader("student.txt");
CryptoSymmetric crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
while ((line = studentFile.ReadLine()) != null)
{
line = crypto.Decrypt(line);
var items = line.Split('\t');
StudentTable.Add(new Student()
{
Id = int.Parse(items[0]), FirstName = items[1], LastName = items[2], Password = items[3], EntranceYear = items[4].ToString()
});
}
studentFile.Close();
StreamReader teacherFile = new StreamReader("teacher.txt");
crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
while ((line = teacherFile.ReadLine()) != null)
{
line = crypto.Decrypt(line);
var items = line.Split('\t');
TeacherTable.Add(new Teacher()
{
Id = int.Parse(items[0]), FirstName = items[1], LastName = items[3], Password = items[3]
});
}
teacherFile.Close();
StreamReader courseFile = new StreamReader("course.txt");
crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
while ((line = courseFile.ReadLine()) != null)
{
line = crypto.Decrypt(line);
var items = line.Split('\t');
CourseTable.Add(new Course()
{
Id = int.Parse(items[0]), ECT = int.Parse(items[1]), Name = items[2], type = items[3]
});
}
courseFile.Close();
StreamReader termFile = new StreamReader("term.txt");
crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
while ((line = termFile.ReadLine()) != null)
{
line = crypto.Decrypt(line);
var items = line.Split('\t');
TermTable.Add(new Term()
{
TermNum = int.Parse(items[0])
,
TermName = items[1]
});
}
termFile.Close();
StreamReader prereQuisiteFile = new StreamReader("prerequisite.txt");
crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
while ((line = prereQuisiteFile.ReadLine()) != null)
{
line = crypto.Decrypt(line);
var items = line.Split('\t');
preQuisiteTable.Add(new PreQuisite()
{
Course1 = (CourseTable.Select(x => x).Where(x => x.Id == int.Parse(items[0])).ToArray())[0]
,
Course2 = (CourseTable.Select(x => x).Where(x => x.Id == int.Parse(items[1])).ToArray())[0]
,
Status = items[2]
});
}
prereQuisiteFile.Close();
StreamReader termCourseFile = new StreamReader("termcourse.txt");
crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
while ((line = termCourseFile.ReadLine()) != null)
{
line = crypto.Decrypt(line);
var items = line.Split('\t');
termCourseTable.Add(new TermCourse()
{
Id = int.Parse(items[0]),
Course = (CourseTable.Select(x => x).Where(x => x.Id == int.Parse(items[1])).ToArray())[0],
Term = (TermTable.Select(x => x).Where(x => x.TermNum == int.Parse(items[2])).ToArray())[0],
Teacher = (TeacherTable.Select(x => x).Where(x => x.Id == int.Parse(items[3])).ToArray())[0],
Time = int.Parse(items[4]),
Place = items[5],
Capacity = int.Parse(items[6])
});
;
}
termCourseFile.Close();
StreamReader termCourseStudentFile = new StreamReader("termcoursestudent.txt");
crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
while ((line = termCourseStudentFile.ReadLine()) != null)
{
line = crypto.Decrypt(line);
var items = line.Split('\t');
termCourseStudentTable.Add(new TermCourseStudent()
{
Mark = double.Parse(items[0])
,
ObjectionToMark = items[1]
,
AnswerToObjection = items[2]
,
TermCourse = (termCourseTable.Select(x => x).Where(x => x.Id == int.Parse(items[3])).ToArray())[0]
,
Student = (StudentTable.Select(x => x).Where(x => x.Id == int.Parse(items[4])).ToArray())[0]
,
Status = items[5]
});
}
termCourseStudentFile.Close();
StreamReader clerkFile = new StreamReader("clerk.txt");
crypto = new CryptoDES(new byte[] { 158, 23, 64, 96, 57, 225, 36, 85 });
while ((line = clerkFile.ReadLine()) != null)
{
line = crypto.Decrypt(line);
var items = line.Split('\t');
ClerkTable.Add(new Clerk()
{
Id = int.Parse(items[0])
,
FirstName = items[1]
,
LastName = items[2]
,
Password = items[3]
});
}
clerkFile.Close();
}
