protected void Submit(object sender, EventArgs e)
{
int docid = 0;
try
{
docid = Convert.ToInt32(Request.QueryString["docid"]);
string key = txtseckey.Text;
DocKeysGenerator gen = new DocKeysGenerator();
gen.GetDocUserKey(docid);
string secretekey = gen.DocUserKey;
if (key == secretekey)
{
value = 1;
Session["seckey"] = secretekey;
}
else
{
value = 0;
}
}
catch (Exception ex) { value = 0; }
if (value == 1)
{
Response.Redirect("Downloading.aspx?docid=" + docid);
}
else if (value == 0)
{
message = "Sorry.!! Secrete Key Authentication 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);
}
protected void Process(object source, DataListCommandEventArgs e)
{
int docid = 0;
try
{
string commandname = e.CommandName.ToString();
docid = Convert.ToInt32(Convert.ToString(e.CommandArgument));
if (commandname == "download")
{
value = 2;
}
if (commandname == "askkey")
{
string userid = Convert.ToString(Session["userid"]);
GetClientDetails cdtl = new GetClientDetails(userid);
string name = cdtl.ClientName;
string email = cdtl.ClientEmailId;
DocKeysGenerator gen = new DocKeysGenerator();
gen.GetDocUserKey(docid);
string seckey = gen.DocUserKey;
GetDocumentDetails dtl = new GetDocumentDetails(docid);
string doctitle = dtl.DocTitle;
string docowner = dtl.DocOwner;
string size = dtl.DocSize + " bytes";
EmailService mail = new EmailService();
mail.sendSecKey(email, seckey, name, doctitle, docowner, size);
value = 1;
RecordUsage rec = new RecordUsage();
rec.record(userid, "askkey");
}
}
catch (Exception ex)
{
value = 0;
}
if (value == 2)
{
Response.Redirect("SecKeyAuthentication.aspx?docid=" + docid);
}
else if (value == 1)
{
message = "Secrete key generated successfully. Key is sent on your registered emailid.";
title = "Success Report";
}
else if (value == 0)
{
message = "Sorry.!! Secrete key generation failed.. Try again..";
title = "Failure Report";
}
string script = "window.onload = function(){ alert('";
script += message;
script += "')};";
ClientScript.RegisterStartupScript(this.GetType(), title, script, true);
}
protected Boolean FileToDownload(string remotepath, string docname, string filePath, string docowner)
{
Boolean flag = false;
try
{
int docid = Convert.ToInt32(Request.QueryString["docid"]);
string userkey = Convert.ToString(Session["seckey"]);
DocKeysGenerator gen = new DocKeysGenerator();
gen.GetDocSecreteKey(docid, userkey);
string docseckey = gen.DocSecreteKey;
string outfilepath = Server.MapPath("UserDocs/") + docowner + "/temp/";
if (!System.IO.Directory.Exists(outfilepath))
{
System.IO.Directory.CreateDirectory(outfilepath);
}
WebClient oclient = new WebClient();
oclient.DownloadFile(remotepath + "/" + docname, outfilepath + "/" + docname);
string decfile = outfilepath + "dec_" + docname;
Cryptography cobj = new Cryptography();
cobj.DecryptAES(outfilepath + "/" + docname, decfile, docseckey);
byte[] myfile = System.IO.File.ReadAllBytes(decfile);
// reverse and store file bytes into another byte array
int filelength = myfile.Length;
int index = filelength - 1;
byte[] rev_file = new byte[filelength];
foreach (byte b in myfile)
{
rev_file[index] = b;
index--;
}
// create a file from reversed bytes and store on local server
string rev_file_path = filePath + "/" + docname;
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);
// file is saved on server
// check its hash value
SHATracker track = new SHATracker();
string shavalue = track.GetSHA1Hash(rev_file_path);
// compare with hash value from xml file
string metaxml = filePath + "/" + docid + "_xml.xml";
DataSet dsxml = new DataSet();
dsxml.ReadXml(metaxml);
string original_hash = Convert.ToString(dsxml.Tables[0].Rows[0]["dochash"]);
// if matches let it get downloaded
if (shavalue == original_hash)
{
flag = true;
// Global.DocDownloadPath = rev_file_path;
}
}
catch (Exception ex) { }
return(flag);
}
