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UploadFiles.aspx.cs
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UploadFiles.aspx.cs
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using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Net.Mail;
using System.Security.Cryptography;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class UploadFIles : System.Web.UI.Page
{
public enum State
{
Hiding,
Filling_With_Zeros
};
SqlConnection con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\Anuradha\Desktop\project\Secure File Storage On Cloud Using Hybrid Cryptography (Akshay Kumar)\Project\App_Data\Database.mdf;Integrated Security=True;User Instance=True");
protected void Page_Load(object sender, EventArgs e)
{
string ses = (string)Session["status"];
if (ses == null)
{
Response.Redirect("Login.aspx");
}
string uid = (string)Session["uid"];
if (!IsPostBack)
{
string s = "select distinct uid from reg where uid!='" + uid + "'";
SqlDataAdapter sda = new SqlDataAdapter(s, con);
DataSet ds = new DataSet();
sda.Fill(ds);
int count = ds.Tables[0].Rows.Count;
DropDownList1.Items.Add("--Select--");
for (int i = 0; i < count; i++)
{
DropDownList1.Items.Add(ds.Tables[0].Rows[i][0].ToString());
}
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (DropDownList1.Text != "--Select--")
{
string file = "", path = "";
try
{
file = FileUpload1.FileName;
path = Server.MapPath("~\\Files\\");
FileUpload1.SaveAs(path + file);
byte[] filearray = File.ReadAllBytes(path + file);
int cou = filearray.Length / 3;
byte[] aes = new byte[cou];
byte[] des = new byte[cou];
byte[] rc = new byte[cou];
for (int i = 0; i < cou; i++)
{
aes[i] = filearray[i];
}
int length = cou;
for (int i = 0; i < cou; i++)
{
length = length + 1;
rc[i] = filearray[length];
}
for (int i = 0; i < cou - 1; i++)
{
length = length + 1;
des[i] = filearray[length];
}
byte[] message;
byte[] encMessage;
byte[] akey = Encoding.ASCII.GetBytes("Vâì†jYK{›µ.$ä‡ÒvlÉ€Aá|ÕÕQkñX");
byte[] aiv = Encoding.ASCII.GetBytes("éêòñC]ÚÖ¦ºÉ¿¸íÃ");
byte[] rckey = Encoding.ASCII.GetBytes("fÛØ%T›Óã†(wk¾£Ö:");
byte[] rciv = Encoding.ASCII.GetBytes("©ž(p2&±");
byte[] deskey = Encoding.ASCII.GetBytes("»ªb; ,¯");
byte[] desiv = Encoding.ASCII.GetBytes("¤x4]ª");
//AES
message = aes;
using (Aes aes1 = new AesCryptoServiceProvider())
{
aes1.Key = akey;
aes1.IV = aiv;
encMessage = EncryptBytes(aes1, message);
}
string aespath = Server.MapPath("~\\AES\\");
string aesfile = file;
using (Stream writer = File.OpenWrite(aespath + aesfile))
{
writer.Write(encMessage, 0, encMessage.Length);
}
//RC
message = rc;
using (RC2 rc1 = new RC2CryptoServiceProvider())
{
rc1.Key = rckey;
rc1.IV = rciv;
encMessage = EncryptBytes(rc1, message);
}
string rcpath = Server.MapPath("~\\RC\\");
string rcfile = file;
using (Stream writer = File.OpenWrite(rcpath + rcfile))
{
writer.Write(encMessage, 0, encMessage.Length);
}
//DES
message = des;
using (DES des1 = new DESCryptoServiceProvider())
{
des1.Key = deskey;
des1.IV = desiv;
encMessage = EncryptBytes(des1, message);
}
string despath = Server.MapPath("~\\DES\\");
string desfile = file;
using (Stream writer = File.OpenWrite(despath + desfile))
{
writer.Write(encMessage, 0, encMessage.Length);
}
}
catch (Exception ep)
{
Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('Please Select a File');", true);
}
string images, paths;
images = FileUpload2.FileName;
paths = Server.MapPath("~\\images\\");
FileUpload2.SaveAs(paths + images);
Bitmap b = new Bitmap(paths + images);
byte[] op1 = ConvertBitmapToByteArray(b);
Bitmap b1 = embedText(TextBox1.Text, b);
byte[] op = ConvertBitmapToByteArray(b1);
System.Drawing.Image img1 = byteArrayToImage(op);
string spath = Server.MapPath("~\\Password\\");
img1.Save(spath + "Enc_" + FileUpload2.FileName);
Image2.ImageUrl = spath + "Enc_" + FileUpload2.FileName;
string com = "";
SqlCommand cmd;
com = "insert into lsb(op) values (@data);";
con.Open();
cmd = new SqlCommand(com, con);
cmd.Parameters.AddWithValue("@data", op);
cmd.ExecuteNonQuery();
con.Close();
Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('File encrypted successfully')", true);
//************************************************Insert**************************
string s = "select fid from details order by fid desc";
SqlDataAdapter sds = new SqlDataAdapter(s, con);
DataSet dss = new DataSet();
sds.Fill(dss);
string ffid = "";
if (dss.Tables[0].Rows.Count > 0)
{
string fid = dss.Tables[0].Rows[0][0].ToString();
int fidd = Convert.ToInt16(fid);
fidd = fidd + 1;
ffid = fidd.ToString();
}
else
{
ffid = "101";
}
string aespath1 = Server.MapPath("~\\AES\\" + file);
string rcpath1 = Server.MapPath("~\\RC\\" + file);
string despath1 = Server.MapPath("~\\DES\\" + file);
string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName);
string uid = (string)Session["uid"];
string com1 = "";
SqlCommand cmd1;
com1 = "insert into details(uid,fid,filenm,aes,des,rc6,type,lsb) values (@uid,@fid,@fn,@aes,@des,@rc6,@type,@lsb);";
con.Open();
cmd1 = new SqlCommand(com1, con);
cmd1.Parameters.AddWithValue("@uid", uid);
cmd1.Parameters.AddWithValue("@fid", ffid);
cmd1.Parameters.AddWithValue("@fn", FileUpload1.FileName);
cmd1.Parameters.AddWithValue("@aes", aespath1);
cmd1.Parameters.AddWithValue("@des", despath1);
cmd1.Parameters.AddWithValue("@rc6", rcpath1);
cmd1.Parameters.AddWithValue("@type", fileExtension);
cmd1.Parameters.AddWithValue("@lsb", op);
cmd1.ExecuteNonQuery();
con.Close();
string ss = "select fid from details order by fid desc";
SqlDataAdapter sdss = new SqlDataAdapter(ss, con);
DataSet dsss = new DataSet();
sdss.Fill(dsss);
string ffids = "";
if (dsss.Tables[0].Rows.Count > 0)
{
string fids = dsss.Tables[0].Rows[0][0].ToString();
int fidds = Convert.ToInt16(fids);
fidds = fidds + 1;
ffids = fidds.ToString();
}
else
{
ffids = "101";
}
string com2 = "";
SqlCommand cmd2;
com2 = "insert into details(uid,fid,filenm,aes,des,rc6,type,lsb) values (@uid,@fid,@fn,@aes,@des,@rc6,@type,@lsb);";
con.Open();
cmd2 = new SqlCommand(com2, con);
cmd2.Parameters.AddWithValue("@uid", DropDownList1.Text);
cmd2.Parameters.AddWithValue("@fid", ffid);
cmd2.Parameters.AddWithValue("@fn", FileUpload1.FileName);
cmd2.Parameters.AddWithValue("@aes", aespath1);
cmd2.Parameters.AddWithValue("@des", despath1);
cmd2.Parameters.AddWithValue("@rc6", rcpath1);
cmd2.Parameters.AddWithValue("@type", fileExtension);
cmd2.Parameters.AddWithValue("@lsb", op);
cmd2.ExecuteNonQuery();
con.Close();
string sem = "select email from reg where uid='" + DropDownList1.Text + "'";
SqlDataAdapter sda = new SqlDataAdapter(sem, con);
DataSet ds = new DataSet();
sda.Fill(ds);
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress("akash.mahesh1212@gmail.com");
string email = ds.Tables[0].Rows[0][0].ToString();
mail.To.Add(email);
mail.Subject = "Image";
mail.Body = "Key is " + TextBox1.Text;
SmtpServer.Port = 587;
SmtpServer.Credentials = new System.Net.NetworkCredential("akash.mahesh1212@gmail.com", "nimishimi");
SmtpServer.EnableSsl = true;
//Attachment
System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment(Image2.ImageUrl);
mail.Attachments.Add(attachment);
SmtpServer.Send(mail);
string fname = FileUpload1.FileName;
string Fpath = Server.MapPath("~\\Files\\");
if (File.Exists(Fpath + fname))
{
File.Delete(Fpath + fname);
}
}
else
{
Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('Kindly select a user to share file with..');", true);
}
}
private static byte[] EncryptBytes(SymmetricAlgorithm alg, byte[] message)
{
if ((message == null) || (message.Length == 0))
{
return message;
}
if (alg == null)
{
throw new ArgumentNullException("alg");
}
using (var stream = new MemoryStream())
using (var encryptor = alg.CreateEncryptor())
using (var encrypt = new CryptoStream(stream, encryptor, CryptoStreamMode.Write))
{
encrypt.Write(message, 0, message.Length);
encrypt.FlushFinalBlock();
return stream.ToArray();
}
}
public System.Drawing.Image byteArrayToImage(byte[] byteArrayIn)
{
MemoryStream ms = new MemoryStream(byteArrayIn, 0, byteArrayIn.Length, true);
ms.Write(byteArrayIn, 0, byteArrayIn.Length);
System.Drawing.Image returnImage = System.Drawing.Image.FromStream(ms, true);
return (returnImage);
}
private byte[] ConvertBitmapToByteArray(Bitmap imageToConvert)
{
MemoryStream ms = new System.IO.MemoryStream();
imageToConvert.Save(ms, ImageFormat.Png);
return ms.ToArray();
}
public static Bitmap embedText(string text, Bitmap bmp)
{
// initially, we'll be hiding characters in the image
State state = State.Hiding;
// holds the index of the character that is being hidden
int charIndex = 0;
// holds the value of the character converted to integer
int charValue = 0;
// holds the index of the color element (R or G or B) that is currently being processed
long pixelElementIndex = 0;
// holds the number of trailing zeros that have been added when finishing the process
int zeros = 0;
// hold pixel elements
int R = 0, G = 0, B = 0;
// pass through the rows
for (int i = 0; i < bmp.Height; i++)
{
// pass through each row
for (int j = 0; j < bmp.Width; j++)
{
// holds the pixel that is currently being processed
Color pixel = bmp.GetPixel(j, i);
// now, clear the least significant bit (LSB) from each pixel element
R = pixel.R - pixel.R % 2;
G = pixel.G - pixel.G % 2;
B = pixel.B - pixel.B % 2;
// for each pixel, pass through its elements (RGB)
for (int n = 0; n < 3; n++)
{
// check if new 8 bits has been processed
if (pixelElementIndex % 8 == 0)
{
// check if the whole process has finished
// we can say that it's finished when 8 zeros are added
if (state == State.Filling_With_Zeros && zeros == 8)
{
// apply the last pixel on the image
// even if only a part of its elements have been affected
if ((pixelElementIndex - 1) % 3 < 2)
{
bmp.SetPixel(j, i, Color.FromArgb(R, G, B));
}
// return the bitmap with the text hidden in
return bmp;
}
// check if all characters has been hidden
if (charIndex >= text.Length)
{
// start adding zeros to mark the end of the text
state = State.Filling_With_Zeros;
}
else
{
// move to the next character and process again
charValue = text[charIndex++];
}
}
// check which pixel element has the turn to hide a bit in its LSB
switch (pixelElementIndex % 3)
{
case 0:
{
if (state == State.Hiding)
{
// the rightmost bit in the character will be (charValue % 2)
// to put this value instead of the LSB of the pixel element
// just add it to it
// recall that the LSB of the pixel element had been cleared
// before this operation
R += charValue % 2;
// removes the added rightmost bit of the character
// such that next time we can reach the next one
charValue /= 2;
}
}
break;
case 1:
{
if (state == State.Hiding)
{
G += charValue % 2;
charValue /= 2;
}
}
break;
case 2:
{
if (state == State.Hiding)
{
B += charValue % 2;
charValue /= 2;
}
bmp.SetPixel(j, i, Color.FromArgb(R, G, B));
}
break;
}
pixelElementIndex++;
if (state == State.Filling_With_Zeros)
{
// increment the value of zeros until it is 8
zeros++;
}
}
}
}
return bmp;
}
}