protected void Page_Load(object sender, EventArgs e)
{
try
{
Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1));
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetNoStore();
userid = Convert.ToString(Session["userid"]);
utype = Convert.ToString(Session["utype"]);
if (userid == "undefined" && utype != "user")
{
Response.Redirect("Invalid.aspx");
}
}
catch (Exception ex) { }
try
{
int docid = Convert.ToInt32(Request.QueryString["docid"]);
GetDocumentDetails dtl = new GetDocumentDetails(docid);
string docname = dtl.DocFileName;
string docowner = dtl.DocOwner;
string filePath = Server.MapPath("UserDocs/") + docowner + "/";
string newpath = "/UserDocs/" + docowner;
BackupHost info = new BackupHost();
string remotepath = "http://" + info.StorageHostName + ":" + info.StorageHostPort + newpath;
string backuppath = "http://" + info.BackupHostName + ":" + info.BackupHostPort + newpath;
if (FileToDownload(remotepath, docname, filePath, docowner))
{
Global.DocDownloadPath = "UserDocs/" + docowner + "/" + docname;
// Response.Write(Global.DocDownloadPath);
Panel1.Visible = true;
Panel2.Visible = false;
string userid = Convert.ToString(Session["userid"]);
RecordUsage rec = new RecordUsage();
rec.record(userid, "download");
rec.record(userid, "decryption");
}
else if (FileToDownload(backuppath, docname, filePath, docowner))
{
//Global.DocDownloadPath = filePath + docname;
Global.DocDownloadPath = "UserDocs/" + docowner + "/" + docname;
// Response.Write(Global.DocDownloadPath);
Panel1.Visible = true;
Panel2.Visible = false;
string userid = Convert.ToString(Session["userid"]);
RecordUsage rec = new RecordUsage();
rec.record(userid, "download");
rec.record(userid, "decryption");
rec.record(userid, "recovery");
}
else
{
Panel1.Visible = false;
Panel2.Visible = true;
}
// else recover the file from backup server
// calculate its hash after decryption and allow it to download
}
catch (Exception ex) { }
}
protected void Submit(object sender, EventArgs e)
{
CloudFuns obj = new CloudFuns();
int docid = obj.FetchMax("uploads", "uploadid");
string userid = Convert.ToString(Session["userid"]);
string newname = "NA", encfilename = "", filePath = "", metaxml = "";
string input = "", output = "", seckey = "", ext = "";
long sizebytes = 0;
int dd = DateTime.Now.Day;
int mm = DateTime.Now.Month;
int yy = DateTime.Now.Year;
string today = dd + "-" + mm + "-" + yy;
int hr = DateTime.Now.Hour;
string now = hr + ":" + DateTime.Now.Minute + ":" + DateTime.Now.Second;
try
{
if (filedocument.HasFile)
{
string filename = filedocument.FileName;
ext = System.IO.Path.GetExtension(filename);
filePath = Server.MapPath("UserDocs/") + userid + "/";
metaxml = docid + "_xml.xml";
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
newname = "doc" + docid + ext;
//---------------------------------
input = filePath + "/" + newname;
encfilename = "doc" + docid + "_enc" + ext;
output = filePath + "/" + encfilename;
if (File.Exists(input))
{
File.Delete(input);
}
// save file for encryption
filedocument.SaveAs(input);
// Calculate SHA Hash of the original document
SHATracker track = new SHATracker();
string shavalue = track.GetSHA1Hash(input);
FileInfo f = new FileInfo(input);
sizebytes = f.Length;
// Generate Keys
Random r = new Random();
seckey = "SEC" + docid + "@" + r.Next(111, 999);
string dockey = docid + newname + "|D@C_" + now.Replace(":", "");
// read all bytes from uploaded file
byte[] file = System.IO.File.ReadAllBytes(input);
// reverse and store file bytes into another byte array
int filelength = file.Length;
int index = filelength - 1;
byte[] rev_file = new byte[filelength];
foreach (byte b in file)
{
rev_file[index] = b;
index--;
}
// create a file from reversed bytes and store on local server
string rev_file_path = filePath + "/rev_file" + docid + ext;
try
{
if (File.Exists(rev_file_path))
{
FileStream fs = new FileStream(rev_file_path, FileMode.Open, FileAccess.Read, FileShare.None);
fs.Close();
File.Delete(rev_file_path);
}
}
catch (Exception ex) { }
File.WriteAllBytes(rev_file_path, rev_file);
// encrypt the file
if (File.Exists(output))
{
File.Delete(output);
}
Cryptography cobj = new Cryptography();
cobj.EncryptAES(rev_file_path, output, dockey);
// Store data in DB
ArrayList data = new ArrayList();
data.Clear();
data.Add(docid);
data.Add(txttitle.Text);
data.Add(sizebytes);
data.Add(txtdesc.Text);
data.Add(userid);
data.Add(metaxml);
data.Add(dockey);
data.Add(seckey);
data.Add(today);
data.Add(now);
data.Add(encfilename);
ManageDocuments dobj = new ManageDocuments();
if (dobj.NewDoc(data))
{
// create metadata XML file and store on local server
DataSet dsxml = new DataSet();
dsxml.Tables.Add();
dsxml.Tables[0].Columns.Add();
dsxml.Tables[0].Columns[0].ColumnName = "dochash";
dsxml.Tables[0].Columns.Add();
dsxml.Tables[0].Columns[1].ColumnName = "uploaddt";
dsxml.Tables[0].Columns.Add();
dsxml.Tables[0].Columns[2].ColumnName = "uploadtime";
dsxml.Tables[0].Columns.Add();
dsxml.Tables[0].Columns[3].ColumnName = "docid";
dsxml.Tables[0].Rows.Add();
dsxml.Tables[0].Rows[0][0] = shavalue;
dsxml.Tables[0].Rows[0][1] = today;
dsxml.Tables[0].Rows[0][2] = now;
dsxml.Tables[0].Rows[0][3] = docid;
if (File.Exists(filePath + metaxml))
{
File.Delete(filePath + metaxml);
}
dsxml.WriteXml(filePath + metaxml);
// store file on storage and backup server
BackupHost info = new BackupHost();
WebClient oclient = new WebClient();
byte[] responseArray = oclient.UploadFile("http://" + info.StorageHostName + ":" + info.StorageHostPort + "/Receiver.aspx?path=" + userid, "POST", output);
byte[] responseArray1 = oclient.UploadFile("http://" + info.BackupHostName + ":" + info.BackupHostPort + "/Receiver.aspx?path=" + userid, "POST", output);
value = 1;
if (File.Exists(input))
{
File.Delete(input);
}
if (File.Exists(output))
{
File.Delete(output);
}
try
{
if (File.Exists(rev_file_path))
{
FileStream fs = null;
try
{
fs = new FileStream(rev_file_path, FileMode.Open, FileAccess.ReadWrite, FileShare.None);
fs.Close();
}
catch (Exception ex) { }
File.Delete(rev_file_path);
}
}
catch (Exception ex) { }
GetClientDetails dtl = new GetClientDetails(userid);
string name = dtl.ClientName;
string email = dtl.ClientEmailId;
EmailService mail = new EmailService();
mail.sendSecKey(email, seckey, name, txttitle.Text);
RecordUsage rec = new RecordUsage();
rec.record(userid, "upload");
rec.record(userid, "encryption");
}
else
{
value = 0;
}
}
}
catch (Exception ex) { value = 0; }
if (value == 1)
{
message = "File uploaded successfully..";
title = "Success Report";
}
else if (value == 0)
{
message = "Sorry.!! File upload failed.. Try again..";
title = "Failure Report";
}
string script = "window.onload = function(){ alert('";
script += message;
script += "')};";
ClientScript.RegisterStartupScript(this.GetType(), title, script, true);
ClearInputs(Page.Controls);
}
