public IActionResult Download(string idEnc)
{
string idDec = Encryption.SymmetricDecrypt(idEnc);
Guid id = Guid.Parse(idDec);
IPHostEntry ipEntry = Dns.GetHostEntry(Dns.GetHostName());
IPAddress[] addr = ipEntry.AddressList;
var sub = _subService.GetSubmission(id);
string absolutePath = @"ValuableFiles\" + sub.File;
FileStream fs = new FileStream(absolutePath, FileMode.Open, FileAccess.Read);
MemoryStream toDownload = new MemoryStream();
fs.CopyTo(toDownload);
string email = sub.Email;
var member = _memService.GetMember(email);
bool pass = Encryption.VerifyData(toDownload, member.PublicKey, sub.Signature);
MemoryStream actualFile = Encryption.HybridDecrypt(toDownload, member.PrivateKey);
if (pass == true)
{
_logger.LogInformation("IP: " + addr[1].ToString() + "\nTime: " + DateTime.Now + "\nUser: "******"\nPDF downloaded");
return(File(actualFile, "application/octet-stream", Guid.NewGuid() + ".pdf"));
}
else
{
_logger.LogError("IP: " + addr[1].ToString() + "\nTime: " + DateTime.Now + "\nUser: "******"\nSomething went wrong");
ModelState.AddModelError("", "Something went wrong");
return(View());
}
}
public AssignmentViewmodel GetAssignment(Guid id)
{
var data = _assignmentsRepository.GetAssignment(id);
AssignmentViewmodel assignment = new AssignmentViewmodel();
assignment.Id = data.Id;
assignment.Name = data.Name;
assignment.Description = data.Description;
assignment.Deadline = data.Deadline;
assignment.Member = _membersService.GetMember(data.MemberEmail);
return(assignment);
}
/// <summary>
/// Visar en sida för att redigera en medlem
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public IActionResult Edit(int?id)
{
if (id == null)
{
return(NotFound());
}
var member = _membersService.GetMember(id);
if (member == null)
{
return(NotFound());
}
return(View(member));
}
public IActionResult Index()
{
var list = _assignmentsService.GetAssignments();
List <AssignmentViewmodel> assignments = new List <AssignmentViewmodel>();
if (User.IsInRole("Student"))
{
foreach (AssignmentViewmodel a in list)
{
string assignmentIssuer = a.Member.Email;
string studentsTeacher = _membersService.GetMember(User.Identity.Name).TeacherEmail;
if (a.Member.Email.Equals(_membersService.GetMember(User.Identity.Name).TeacherEmail))
{
assignments.Add(a);
}
}
var submissions = _assignmentsService.GetSubmissions(User.Identity.Name);
ViewBag.Submissions = submissions;
return(View(assignments));
}
return(View(list));
}
public IActionResult Index()
{
try
{
string email;
if (User.IsInRole("teacher"))
{
email = User.Identity.Name;
}
else
{
var member = _membersService.GetMember(User.Identity.Name);
email = member.LecturerEmail;
}
var taskList = _taskService.GetTasks(email);
return(View(taskList));
}
catch (Exception ex)
{
_logger.LogError(ex.Message + " ip: " + GetIpAddress() + " | Timestamp: " + DateTime.Now + " | Email: " + User.Identity.Name);
return(RedirectToAction("Error", "Home"));
}
}
public IActionResult Index()
{
string email = User.Identity.Name;
var student = _memService.GetMember(email);
if (student == null)
{
var list = _taskService.GetTasks(email);
return(View(list));
}
else
{
string teaEmail = student.TeacherEmail;
var list = _taskService.GetTasks(teaEmail);
return(View(list));
}
}
public IActionResult AddStudent(AddStudentModel model)
{
if (!ModelState.IsValid)
{
TempData["warning"] = "Invalid";
return(View());
}
if (_membersService.GetMember(model.MemberModel.Email) != null)
{
TempData["warning"] = "Student already exists";
return(RedirectToAction("Index", "Assignments"));
}
string randomPassword = GenerateRandomPassword();
var user = new ApplicationUser {
UserName = model.MemberModel.Email, Email = model.MemberModel.Email
};
var result = _userManager.CreateAsync(user, randomPassword);
if (result.Result.Succeeded)
{
_userManager.AddToRoleAsync(user, "Student");
EmailModel em = new EmailModel();
em.Email = "*****@*****.**";
em.To = model.MemberModel.Email;
model.EmailModel = em;
using (MailMessage mm = new MailMessage(model.EmailModel.Email, model.EmailModel.To))
{
mm.Subject = "Login Credentials";
mm.Body = "You have been assigned an account. Username is: " + em.To + " and your password is : " + randomPassword;
mm.IsBodyHtml = false;
using (SmtpClient smtp = new SmtpClient())
{
smtp.Host = "smtp.gmail.com";
smtp.EnableSsl = true;
NetworkCredential NetworkCred = new NetworkCredential(model.EmailModel.Email, "74bf*XBG^0ga");
smtp.UseDefaultCredentials = true;
smtp.Credentials = NetworkCred;
smtp.Port = 587;
smtp.Send(mm);
ViewBag.Message = "Email sent";
}
}
model.MemberModel.TeacherEmail = User.Identity.Name;
Tuple <string, string> keys = CryptographicHelper.GenerateAsymmetricKeys();
model.MemberModel.PublicKey = keys.Item1;
model.MemberModel.PrivateKey = keys.Item2;
_membersService.AddMember(model.MemberModel);
}
return(RedirectToAction("Index", "Assignments"));
}
//[Authorize]
public IActionResult Create(IFormFile file, SubmissionViewModel data, string id)
{
try
{
string urlEnc = Encryption.SymmetricDecrypt(id);
Guid decId = Guid.Parse(urlEnc);
var memId = _membersService.GetMember(User.Identity.Name);
if (file != null)
{
data.task = _tasksService.GetTask(decId);
if (data.task.deadline > DateTime.Now)
{
string uniqueFilename;
if (System.IO.Path.GetExtension(file.FileName) == ".pdf" && file.Length < 1048576)
{
byte[] whiteList = new byte[] { 37, 80, 68, 70 };
if (file != null)
{
MemoryStream ms = new MemoryStream();
using (var f = file.OpenReadStream())
{
byte[] buffer = new byte[4];
f.Read(buffer, 0, 4);
for (int i = 0; i < whiteList.Length; i++)
{
if (whiteList[i] == buffer[i])
{
}
else
{
ModelState.AddModelError("file", "Invalid file");
_logger.LogError("Invalid file |" + " ip: " + GetIpAddress() + " | Timestamp: " + DateTime.Now + " | Email: " + User.Identity.Name);
return(View());
}
}
f.Position = 0;
uniqueFilename = Guid.NewGuid() + Path.GetExtension(file.FileName);
data.file = uniqueFilename;
string absolutePath = @"ValuableFiles\" + uniqueFilename;
try
{
file.CopyTo(ms);
var encFile = Encryption.HybridEncrypt(ms, memId.PublicKey);
data.signature = Encryption.SignData(ms, memId.PrivateKey);
System.IO.File.WriteAllBytes(absolutePath, encFile.ToArray());
f.Close();
}
catch (Exception ex)
{
_logger.LogError(ex, "Error happend while saving file |" + " ip: " + GetIpAddress() + " | Timestamp: " + DateTime.Now + " | Email: " + User.Identity.Name);
return(View("Error", new ErrorViewModel()
{
Message = "Error while saving the file. Try again later"
}));
}
}
}
}
else
{
ModelState.AddModelError("file", "File is not valid or size is greater than 10Mb");
_logger.LogError("File is not valid or size is greater than 10Mb |" + " ip: " + GetIpAddress() + " | Timestamp: " + DateTime.Now + " | Email: " + User.Identity.Name);
return(View());
}
data.email = HttpContext.User.Identity.Name;
_submissionService.AddSubmission(data);
TempData["message"] = "Document submitted successfully";
_logger.LogInformation("File uploaded successfully | ip: " + GetIpAddress() + " | Timestamp: " + DateTime.Now + " | Email: " + User.Identity.Name);
return(View());
}
else
{
TempData["error"] = "Deadline date overdue";
_logger.LogError("Deadline date overdue |" + " ip: " + GetIpAddress() + " | Timestamp: " + DateTime.Now + " | Email: " + User.Identity.Name);
return(View());
}
}
else
{
ModelState.AddModelError("file", "Check your input. Operation failed");
return(View(data));
}
}
catch (Exception ex)
{
_logger.LogError(ex.Message + " ip: " + GetIpAddress() + " | Timestamp: " + DateTime.Now + " | Email: " + User.Identity.Name);
return(RedirectToAction("Error"));
}
}
public Member GetMember(long?id)
{
return(_members.GetMember(id.Value));
}
public IActionResult Create(IFormFile file, FileViewModel data, Guid id)
{
try
{
data.task = _tasksService.GetTask(id);
if (data.task.deadline > DateTime.Now)
{
if (ModelState.IsValid)
{
string uniqueFilename;
if (System.IO.Path.GetExtension(file.FileName) == ".pdf" && file.Length < 1048576)
{
//137 80 78 71 13 10 26 10
byte[] whiteList = new byte[] { 37, 80, 68, 70 };
if (file != null)
{
MemoryStream msIn = new MemoryStream();
using (var f = file.OpenReadStream())
{
f.Position = 0;
byte[] buffer = new byte[4];
f.Read(buffer, 0, 4);
for (int i = 0; i < whiteList.Length; i++)
{
if (whiteList[i] == buffer[i])
{
}
else
{
ModelState.AddModelError("file", "file is not valid and accapteable");
return(View());
}
}
//...other reading of bytes happening
f.Position = 0;
// f.CopyTo(msIn); //hybird encrypt
//uploading the file
//correctness
uniqueFilename = Guid.NewGuid() + Path.GetExtension(file.FileName);
data.file = uniqueFilename;
string absolutePath = @"ValuableFiles\" + uniqueFilename;
try
{
var member = _memberService.GetMember(User.Identity.Name);
file.CopyTo(msIn);
var encryptedData = Encryption.HybridEncrypt(msIn, member.publicKey);
System.IO.File.WriteAllBytes(absolutePath, encryptedData.ToArray());
data.signature = Encryption.SignData(encryptedData, member.privateKey);
f.Close();
}
catch (Exception ex)
{
//log
_logger.LogError(ex, "Error happend while saving file");
return(View("Error", new ErrorViewModel()
{
Message = "Error while saving the file. Try again later"
}));
}
}
}
}
else
{
ModelState.AddModelError("file", "File is not valid and acceptable or size is greater than 10Mb");
return(View());
}
//once the file has been inserted successfully in the db
data.email = HttpContext.User.Identity.Name; //this is the currently logged in user
_fileSerive.AddFile(data);
var remoteIpAddress = Request.HttpContext.Connection.RemoteIpAddress;
_logger.LogInformation("Current user uploading in files section: " + remoteIpAddress + " TimeStamp: " + System.DateTime.Now + " User: "******" File Id: " + data.file);
TempData["message"] = "File inserted successfully";
return(View());
}
else
{
ModelState.AddModelError("", "Check your input. Operation failed");
return(View(data));
}
}
else
{
TempData["error"] = "File deadline already passes";
return(View());
}
}
catch (Exception ex)
{
_logger.LogInformation("File upload not working" + ex);
return(RedirectToAction("Error", "home"));
}
}
