public async Task <IActionResult> ViewPaste(string type, string url, string password)
{
Models.Paste paste = _dbContext.Pastes.Where(p => p.Url == url).FirstOrDefault();
if (paste != null)
{
ViewBag.Title = (string.IsNullOrEmpty(paste.Title)) ? "Untitled Paste" : paste.Title + " | Pastebin";
ViewBag.Description = "Paste your code or text easily and securely. Set an expiration, set a password, or leave it open for the world to see.";
// Increment Views
paste.Views += 1;
_dbContext.Entry(paste).State = EntityState.Modified;
_dbContext.SaveChanges();
// Check Expiration
if (PasteHelper.CheckExpiration(paste))
{
DeleteFile(paste);
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}
PasteViewModel model = new PasteViewModel();
model.Url = url;
model.Title = paste.Title;
model.Syntax = paste.Syntax;
model.DatePosted = paste.DatePosted;
model.Username = paste.User?.Username;
if (User.Identity.IsAuthenticated && type.ToLower() == "full")
{
Users.Models.User user = UserHelper.GetUser(_dbContext, User.Identity.Name);
if (user != null)
{
model.Vaults = user.Vaults.ToList();
}
}
byte[] ivBytes = (string.IsNullOrEmpty(paste.IV)) ? new byte[paste.BlockSize] : Encoding.Unicode.GetBytes(paste.IV);
byte[] keyBytes = (string.IsNullOrEmpty(paste.Key)) ? new byte[paste.KeySize] : AesCounterManaged.CreateKey(paste.Key, ivBytes, paste.KeySize);
// The paste has a password set
if (!string.IsNullOrEmpty(paste.HashedPassword))
{
if (string.IsNullOrEmpty(password))
{
// Try to get the password from the session
password = GetCachedPassword(url);
}
string hash = string.Empty;
if (!string.IsNullOrEmpty(password))
{
hash = PasteHelper.HashPassword(paste.Key, password);
keyBytes = AesCounterManaged.CreateKey(password, ivBytes, paste.KeySize);
}
if (string.IsNullOrEmpty(password) || hash != paste.HashedPassword)
{
PasswordViewModel passModel = new PasswordViewModel();
passModel.ActionUrl = Url.SubRouteUrl("p", "Paste.View");
passModel.Url = url;
passModel.Type = type;
if (!string.IsNullOrEmpty(password) && hash != paste.HashedPassword)
{
passModel.Error = true;
passModel.ErrorMessage = "Invalid Password";
}
// Redirect them to the password request page
return(View("~/Areas/Paste/Views/Paste/PasswordNeeded.cshtml", passModel));
}
}
// Save the password to the cache
CachePassword(url, password);
// Read in the file
if (string.IsNullOrEmpty(paste.FileName))
{
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}
string subDir = paste.FileName[0].ToString();
string filePath = Path.Combine(_config.PasteConfig.PasteDirectory, subDir, paste.FileName);
if (!System.IO.File.Exists(filePath))
{
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}
using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
using (AesCounterStream cs = new AesCounterStream(fs, false, keyBytes, ivBytes))
using (StreamReader sr = new StreamReader(cs, Encoding.Unicode))
{
model.Content = await sr.ReadToEndAsync();
}
switch (type.ToLower())
{
case "full":
return(View("~/Areas/Paste/Views/Paste/Full.cshtml", model));
case "simple":
return(View("~/Areas/Paste/Views/Paste/Simple.cshtml", model));
case "raw":
return(Content(model.Content, "text/plain"));
case "download":
//Create File
var cd = new System.Net.Mime.ContentDisposition
{
FileName = url + ".txt",
Inline = true
};
Response.Headers.Add("Content-Disposition", cd.ToString());
FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
return(new BufferedFileStreamResult("application/octet-stream", async(response) => await ResponseHelper.StreamToOutput(response, true, new AesCounterStream(fs, false, keyBytes, ivBytes), (int)fs.Length, _config.PasteConfig.ChunkSize), false));
default:
return(View("~/Areas/Paste/Views/Paste/Full.cshtml", model));
}
}
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}
private static async Task <bool> ScanUpload(Config config, TeknikEntities db, Upload upload, int totalCount, int currentCount)
{
bool virusDetected = false;
string subDir = upload.FileName[0].ToString();
string filePath = Path.Combine(config.UploadConfig.UploadDirectory, subDir, upload.FileName);
if (File.Exists(filePath))
{
// If the IV is set, and Key is set, then scan it
if (!string.IsNullOrEmpty(upload.Key) && !string.IsNullOrEmpty(upload.IV))
{
byte[] keyBytes = Encoding.UTF8.GetBytes(upload.Key);
byte[] ivBytes = Encoding.UTF8.GetBytes(upload.IV);
long maxUploadSize = config.UploadConfig.MaxUploadSize;
if (upload.User != null)
{
maxUploadSize = config.UploadConfig.MaxUploadSizeBasic;
IdentityUserInfo userInfo = await IdentityHelper.GetIdentityUserInfo(config, upload.User.Username);
if (userInfo.AccountType == AccountType.Premium)
{
maxUploadSize = config.UploadConfig.MaxUploadSizePremium;
}
}
using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
using (AesCounterStream aesStream = new AesCounterStream(fs, false, keyBytes, ivBytes))
{
ClamClient clam = new ClamClient(config.UploadConfig.ClamServer, config.UploadConfig.ClamPort);
clam.MaxStreamSize = maxUploadSize;
ClamScanResult scanResult = await clam.SendAndScanFileAsync(fs);
switch (scanResult.Result)
{
case ClamScanResults.Clean:
string cleanMsg = string.Format("[{0}] Clean Scan: {1}/{2} Scanned | {3} - {4}", DateTime.Now, currentCount, totalCount, upload.Url, upload.FileName);
Output(cleanMsg);
break;
case ClamScanResults.VirusDetected:
string msg = string.Format("[{0}] Virus Detected: {1} - {2} - {3}", DateTime.Now, upload.Url, upload.FileName, scanResult.InfectedFiles.First().VirusName);
Output(msg);
lock (scanStatsLock)
{
virusDetected = true;
File.AppendAllLines(virusFile, new List <string> {
msg
});
}
lock (dbLock)
{
string urlName = upload.Url;
// Delete from the DB
db.Uploads.Remove(upload);
// Delete the File
if (File.Exists(filePath))
{
File.Delete(filePath);
}
// Add to transparency report if any were found
Takedown report = new Takedown();
report.Requester = TAKEDOWN_REPORTER;
report.RequesterContact = config.SupportEmail;
report.DateRequested = DateTime.Now;
report.Reason = "Malware Found";
report.ActionTaken = string.Format("Upload removed: {0}", urlName);
report.DateActionTaken = DateTime.Now;
db.Takedowns.Add(report);
// Save Changes
db.SaveChanges();
}
break;
case ClamScanResults.Error:
string errorMsg = string.Format("[{0}] Scan Error: {1}", DateTime.Now, scanResult.RawResult);
File.AppendAllLines(errorFile, new List <string> {
errorMsg
});
Output(errorMsg);
break;
case ClamScanResults.Unknown:
string unkMsg = string.Format("[{0}] Unknown Scan Result: {1}", DateTime.Now, scanResult.RawResult);
File.AppendAllLines(errorFile, new List <string> {
unkMsg
});
Output(unkMsg);
break;
}
}
}
}
return(virusDetected);
}
public async Task <IActionResult> Edit(string url, string password)
{
Models.Paste paste = _dbContext.Pastes.Where(p => p.Url == url).FirstOrDefault();
if (paste != null)
{
if (paste.User?.Username != User.Identity.Name)
{
return(new StatusCodeResult(StatusCodes.Status403Forbidden));
}
ViewBag.Title = "Edit Paste";
ViewBag.Description = "Edit your paste's content.";
// Check Expiration
if (PasteHelper.CheckExpiration(paste))
{
DeleteFile(paste);
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}
PasteViewModel model = new PasteViewModel();
model.Url = url;
model.Title = paste.Title;
model.Syntax = paste.Syntax;
model.DatePosted = paste.DatePosted;
model.Username = paste.User?.Username;
byte[] ivBytes = (string.IsNullOrEmpty(paste.IV)) ? new byte[paste.BlockSize] : Encoding.Unicode.GetBytes(paste.IV);
byte[] keyBytes = (string.IsNullOrEmpty(paste.Key)) ? new byte[paste.KeySize] : AesCounterManaged.CreateKey(paste.Key, ivBytes, paste.KeySize);
// The paste has a password set
if (!string.IsNullOrEmpty(paste.HashedPassword))
{
if (string.IsNullOrEmpty(password))
{
// Try to get the password from the session
password = GetCachedPassword(url);
}
string hash = string.Empty;
if (!string.IsNullOrEmpty(password))
{
hash = PasteHelper.HashPassword(paste.Key, password);
keyBytes = AesCounterManaged.CreateKey(password, ivBytes, paste.KeySize);
}
if (string.IsNullOrEmpty(password) || hash != paste.HashedPassword)
{
PasswordViewModel passModel = new PasswordViewModel();
passModel.ActionUrl = Url.SubRouteUrl("p", "Paste.Edit");
passModel.Url = url;
if (!string.IsNullOrEmpty(password) && hash != paste.HashedPassword)
{
passModel.Error = true;
passModel.ErrorMessage = "Invalid Password";
}
// Redirect them to the password request page
return(View("~/Areas/Paste/Views/Paste/PasswordNeeded.cshtml", passModel));
}
}
// Cache the password
CachePassword(url, password);
// Read in the file
if (string.IsNullOrEmpty(paste.FileName))
{
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}
string subDir = paste.FileName[0].ToString();
string filePath = Path.Combine(_config.PasteConfig.PasteDirectory, subDir, paste.FileName);
if (!System.IO.File.Exists(filePath))
{
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}
using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
using (AesCounterStream cs = new AesCounterStream(fs, false, keyBytes, ivBytes))
using (StreamReader sr = new StreamReader(cs, Encoding.Unicode))
{
model.Content = await sr.ReadToEndAsync();
}
return(View("~/Areas/Paste/Views/Paste/Edit.cshtml", model));
}
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}
public async Task <IActionResult> ViewVault(string id)
{
Models.Vault foundVault = _dbContext.Vaults.Where(v => v.Url == id).FirstOrDefault();
if (foundVault != null)
{
// Update view count
foundVault.Views += 1;
_dbContext.Entry(foundVault).State = EntityState.Modified;
_dbContext.SaveChanges();
ViewBag.Title = foundVault.Title + " | Vault";
VaultViewModel model = new VaultViewModel();
model.CurrentSub = Subdomain;
model.Url = foundVault.Url;
model.UserId = foundVault.UserId;
model.User = foundVault.User;
model.Title = foundVault.Title;
model.Description = foundVault.Description;
model.DateCreated = foundVault.DateCreated;
model.DateEdited = foundVault.DateEdited;
if (foundVault.VaultItems.Any())
{
foreach (VaultItem item in foundVault.VaultItems.OrderBy(v => v.Index))
{
if (item.GetType().BaseType == typeof(UploadVaultItem))
{
UploadVaultItem upload = (UploadVaultItem)item;
// Increment Views
upload.Upload.Downloads += 1;
_dbContext.Entry(upload.Upload).State = EntityState.Modified;
_dbContext.SaveChanges();
UploadItemViewModel uploadModel = new UploadItemViewModel();
uploadModel.VaultItemId = item.VaultItemId;
uploadModel.Title = item.Title;
uploadModel.Description = item.Description;
uploadModel.DateAdded = item.DateAdded;
uploadModel.Upload = upload.Upload;
model.Items.Add(uploadModel);
}
else if (item.GetType().BaseType == typeof(PasteVaultItem))
{
PasteVaultItem paste = (PasteVaultItem)item;
// Increment Views
paste.Paste.Views += 1;
_dbContext.Entry(paste.Paste).State = EntityState.Modified;
_dbContext.SaveChanges();
// Check Expiration
if (PasteHelper.CheckExpiration(paste.Paste))
{
_dbContext.Pastes.Remove(paste.Paste);
_dbContext.SaveChanges();
break;
}
PasteItemViewModel pasteModel = new PasteItemViewModel();
pasteModel.VaultItemId = item.VaultItemId;
pasteModel.Title = item.Title;
pasteModel.Description = item.Description;
pasteModel.DateAdded = item.DateAdded;
pasteModel.PasteId = paste.Paste.PasteId;
pasteModel.Url = paste.Paste.Url;
pasteModel.DatePosted = paste.Paste.DatePosted;
pasteModel.Syntax = paste.Paste.Syntax;
pasteModel.HasPassword = !string.IsNullOrEmpty(paste.Paste.HashedPassword);
if (!pasteModel.HasPassword)
{
// Read in the file
string subDir = paste.Paste.FileName[0].ToString();
string filePath = Path.Combine(_config.PasteConfig.PasteDirectory, subDir, paste.Paste.FileName);
if (!System.IO.File.Exists(filePath))
{
continue;
}
byte[] ivBytes = Encoding.Unicode.GetBytes(paste.Paste.IV);
byte[] keyBytes = AesCounterManaged.CreateKey(paste.Paste.Key, ivBytes, paste.Paste.KeySize);
using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
using (AesCounterStream cs = new AesCounterStream(fs, false, keyBytes, ivBytes))
using (StreamReader sr = new StreamReader(cs, Encoding.Unicode))
{
pasteModel.Content = await sr.ReadToEndAsync();
}
}
model.Items.Add(pasteModel);
}
}
}
return(View(model));
}
return(new StatusCodeResult(StatusCodes.Status404NotFound));
}