{

public class encmain : System.Windows.Forms.Form

{

#region Windows Form Designer generated code

public encmain() : base()

{

//This call is required by the Windows Form Designer.

InitializeComponent();

//Add any initialization after the InitializeComponent() call

}

//Form overrides dispose to clean up the component list.

protected override void Dispose(bool disposing)

{

if (disposing)

{

if (components != null)

{

components.Dispose();

}

}

base.Dispose(disposing);

}

//Required by the Windows Form Designer

private System.ComponentModel.IContainer components;

//NOTE: The following procedure is required by the Windows Form Designer

//It can be modified using the Windows Form Designer.

//Do not modify it using the code editor.

internal System.Windows.Forms.TabControl TabControl1;

internal System.Windows.Forms.TabPage TabPage1;

internal System.Windows.Forms.TabPage TabPage2;

internal System.Windows.Forms.Label Label2;

internal System.Windows.Forms.Label Label3;

internal System.Windows.Forms.Label Label1;

internal System.Windows.Forms.Label Label4;

internal System.Windows.Forms.Label Label5;

internal System.Windows.Forms.Label Label6;

internal System.Windows.Forms.Label Label7;

internal System.Windows.Forms.Label Label8;

internal System.Windows.Forms.TextBox txtDestinationEncrypt;

internal System.Windows.Forms.Button btnEncrypt;

internal System.Windows.Forms.TextBox txtConPassEncrypt;

internal System.Windows.Forms.TextBox txtPassEncrypt;

internal System.Windows.Forms.TextBox txtFileToEncrypt;

internal System.Windows.Forms.ProgressBar pbStatus;

internal System.Windows.Forms.TextBox txtDestinationDecrypt;

internal System.Windows.Forms.Button btnDecrypt;

internal System.Windows.Forms.TextBox txtConPassDecrypt;

internal System.Windows.Forms.TextBox txtPassDecrypt;

internal System.Windows.Forms.TextBox txtFileToDecrypt;

internal System.Windows.Forms.Button btnChangeEncrypt;

internal System.Windows.Forms.Button btnBrowseEncrypt;

internal System.Windows.Forms.Button btnChangeDecrypt;

internal System.Windows.Forms.Button btnBrowseDecrypt;

internal System.Windows.Forms.OpenFileDialog OpenFileDialog;

internal System.Windows.Forms.FolderBrowserDialog FolderBrowserDialog;

[System.Diagnostics.DebuggerStepThrough()]

private void InitializeComponent()

{

this.TabControl1 = new System.Windows.Forms.TabControl();

this.TabPage1 = new System.Windows.Forms.TabPage();

this.btnChangeEncrypt = new System.Windows.Forms.Button();

this.txtDestinationEncrypt = new System.Windows.Forms.TextBox();

this.Label4 = new System.Windows.Forms.Label();

this.btnEncrypt = new System.Windows.Forms.Button();

this.txtConPassEncrypt = new System.Windows.Forms.TextBox();

this.txtPassEncrypt = new System.Windows.Forms.TextBox();

this.Label1 = new System.Windows.Forms.Label();

this.Label3 = new System.Windows.Forms.Label();

this.Label2 = new System.Windows.Forms.Label();

this.btnBrowseEncrypt = new System.Windows.Forms.Button();

this.txtFileToEncrypt = new System.Windows.Forms.TextBox();

this.TabPage2 = new System.Windows.Forms.TabPage();

this.btnChangeDecrypt = new System.Windows.Forms.Button();

this.txtDestinationDecrypt = new System.Windows.Forms.TextBox();

this.Label5 = new System.Windows.Forms.Label();

this.btnDecrypt = new System.Windows.Forms.Button();

this.txtConPassDecrypt = new System.Windows.Forms.TextBox();

this.txtPassDecrypt = new System.Windows.Forms.TextBox();

this.Label6 = new System.Windows.Forms.Label();

this.Label7 = new System.Windows.Forms.Label();

this.Label8 = new System.Windows.Forms.Label();

this.btnBrowseDecrypt = new System.Windows.Forms.Button();

this.txtFileToDecrypt = new System.Windows.Forms.TextBox();

this.pbStatus = new System.Windows.Forms.ProgressBar();

this.OpenFileDialog = new System.Windows.Forms.OpenFileDialog();

this.FolderBrowserDialog = new System.Windows.Forms.FolderBrowserDialog();

this.TabControl1.SuspendLayout();

this.TabPage1.SuspendLayout();

this.TabPage2.SuspendLayout();

this.SuspendLayout();

//

// TabControl1

//

this.TabControl1.Controls.Add(this.TabPage1);

this.TabControl1.Controls.Add(this.TabPage2);

this.TabControl1.Location = new System.Drawing.Point(0, 0);

this.TabControl1.Name = "TabControl1";

this.TabControl1.SelectedIndex = 0;

this.TabControl1.Size = new System.Drawing.Size(384, 144);

this.TabControl1.TabIndex = 0;

//

// TabPage1

//

this.TabPage1.BackColor = System.Drawing.SystemColors.Control;

this.TabPage1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;

this.TabPage1.Controls.Add(this.btnChangeEncrypt);

this.TabPage1.Controls.Add(this.txtDestinationEncrypt);

this.TabPage1.Controls.Add(this.Label4);

this.TabPage1.Controls.Add(this.btnEncrypt);

this.TabPage1.Controls.Add(this.txtConPassEncrypt);

this.TabPage1.Controls.Add(this.txtPassEncrypt);

this.TabPage1.Controls.Add(this.Label1);

this.TabPage1.Controls.Add(this.Label3);

this.TabPage1.Controls.Add(this.Label2);

this.TabPage1.Controls.Add(this.btnBrowseEncrypt);

this.TabPage1.Controls.Add(this.txtFileToEncrypt);

this.TabPage1.Location = new System.Drawing.Point(4, 22);

this.TabPage1.Name = "TabPage1";

this.TabPage1.Size = new System.Drawing.Size(376, 118);

this.TabPage1.TabIndex = 0;

this.TabPage1.Text = "Encrypt File";

//

// btnChangeEncrypt

//

this.btnChangeEncrypt.Enabled = false;

this.btnChangeEncrypt.Location = new System.Drawing.Point(296, 32);

this.btnChangeEncrypt.Name = "btnChangeEncrypt";

this.btnChangeEncrypt.Size = new System.Drawing.Size(72, 21);

this.btnChangeEncrypt.TabIndex = 11;

this.btnChangeEncrypt.Text = "Change";

this.btnChangeEncrypt.Click += new System.EventHandler(this.btnChangeEncrypt_Click);

//

// txtDestinationEncrypt

//

this.txtDestinationEncrypt.Location = new System.Drawing.Point(104, 32);

this.txtDestinationEncrypt.Name = "txtDestinationEncrypt";

this.txtDestinationEncrypt.ReadOnly = true;

this.txtDestinationEncrypt.Size = new System.Drawing.Size(184, 20);

this.txtDestinationEncrypt.TabIndex = 10;

//

// Label4

//

this.Label4.Location = new System.Drawing.Point(8, 32);

this.Label4.Name = "Label4";

this.Label4.Size = new System.Drawing.Size(88, 16);

this.Label4.TabIndex = 9;

this.Label4.Text = "File destination:";

this.Label4.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// btnEncrypt

//

this.btnEncrypt.Enabled = false;

this.btnEncrypt.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.btnEncrypt.Location = new System.Drawing.Point(296, 72);

this.btnEncrypt.Name = "btnEncrypt";

this.btnEncrypt.Size = new System.Drawing.Size(72, 32);

this.btnEncrypt.TabIndex = 8;

this.btnEncrypt.Text = "Encrypt";

this.btnEncrypt.Click += new System.EventHandler(this.btnEncrypt_Click);

//

// txtConPassEncrypt

//

this.txtConPassEncrypt.Location = new System.Drawing.Point(104, 88);

this.txtConPassEncrypt.Name = "txtConPassEncrypt";

this.txtConPassEncrypt.PasswordChar = '*';

this.txtConPassEncrypt.Size = new System.Drawing.Size(184, 20);

this.txtConPassEncrypt.TabIndex = 7;

//

// txtPassEncrypt

//

this.txtPassEncrypt.Location = new System.Drawing.Point(104, 64);

this.txtPassEncrypt.Name = "txtPassEncrypt";

this.txtPassEncrypt.PasswordChar = '*';

this.txtPassEncrypt.Size = new System.Drawing.Size(184, 20);

this.txtPassEncrypt.TabIndex = 6;

//

// Label1

//

this.Label1.Location = new System.Drawing.Point(16, 8);

this.Label1.Name = "Label1";

this.Label1.Size = new System.Drawing.Size(80, 16);

this.Label1.TabIndex = 5;

this.Label1.Text = "File to encrypt:";

this.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// Label3

//

this.Label3.Location = new System.Drawing.Point(-8, 88);

this.Label3.Name = "Label3";

this.Label3.Size = new System.Drawing.Size(104, 16);

this.Label3.TabIndex = 4;

this.Label3.Text = "Confirm password:";

this.Label3.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// Label2

//

this.Label2.Location = new System.Drawing.Point(8, 64);

this.Label2.Name = "Label2";

this.Label2.Size = new System.Drawing.Size(88, 16);

this.Label2.TabIndex = 3;

this.Label2.Text = "Type password:";

this.Label2.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// btnBrowseEncrypt

//

this.btnBrowseEncrypt.Location = new System.Drawing.Point(296, 8);

this.btnBrowseEncrypt.Name = "btnBrowseEncrypt";

this.btnBrowseEncrypt.Size = new System.Drawing.Size(72, 21);

this.btnBrowseEncrypt.TabIndex = 2;

this.btnBrowseEncrypt.Text = "Browse";

this.btnBrowseEncrypt.Click += new System.EventHandler(this.btnBrowseEncrypt_Click);

//

// txtFileToEncrypt

//

this.txtFileToEncrypt.Location = new System.Drawing.Point(104, 8);

this.txtFileToEncrypt.Name = "txtFileToEncrypt";

this.txtFileToEncrypt.ReadOnly = true;

this.txtFileToEncrypt.Size = new System.Drawing.Size(184, 20);

this.txtFileToEncrypt.TabIndex = 1;

this.txtFileToEncrypt.Text = "Click Browse to load file.";

//

// TabPage2

//

this.TabPage2.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;

this.TabPage2.Controls.Add(this.btnChangeDecrypt);

this.TabPage2.Controls.Add(this.txtDestinationDecrypt);

this.TabPage2.Controls.Add(this.Label5);

this.TabPage2.Controls.Add(this.btnDecrypt);

this.TabPage2.Controls.Add(this.txtConPassDecrypt);

this.TabPage2.Controls.Add(this.txtPassDecrypt);

this.TabPage2.Controls.Add(this.Label6);

this.TabPage2.Controls.Add(this.Label7);

this.TabPage2.Controls.Add(this.Label8);

this.TabPage2.Controls.Add(this.btnBrowseDecrypt);

this.TabPage2.Controls.Add(this.txtFileToDecrypt);

this.TabPage2.Location = new System.Drawing.Point(4, 22);

this.TabPage2.Name = "TabPage2";

this.TabPage2.Size = new System.Drawing.Size(376, 118);

this.TabPage2.TabIndex = 1;

this.TabPage2.Text = "Decrypt File";

//

// btnChangeDecrypt

//

this.btnChangeDecrypt.Enabled = false;

this.btnChangeDecrypt.Location = new System.Drawing.Point(296, 32);

this.btnChangeDecrypt.Name = "btnChangeDecrypt";

this.btnChangeDecrypt.Size = new System.Drawing.Size(72, 21);

this.btnChangeDecrypt.TabIndex = 22;

this.btnChangeDecrypt.Text = "Change";

this.btnChangeDecrypt.Click += new System.EventHandler(this.btnChangeDecrypt_Click);

//

// txtDestinationDecrypt

//

this.txtDestinationDecrypt.Location = new System.Drawing.Point(104, 32);

this.txtDestinationDecrypt.Name = "txtDestinationDecrypt";

this.txtDestinationDecrypt.ReadOnly = true;

this.txtDestinationDecrypt.Size = new System.Drawing.Size(184, 20);

this.txtDestinationDecrypt.TabIndex = 21;

//

// Label5

//

this.Label5.Location = new System.Drawing.Point(8, 32);

this.Label5.Name = "Label5";

this.Label5.Size = new System.Drawing.Size(88, 16);

this.Label5.TabIndex = 20;

this.Label5.Text = "File destination:";

this.Label5.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// btnDecrypt

//

this.btnDecrypt.Enabled = false;

this.btnDecrypt.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.btnDecrypt.Location = new System.Drawing.Point(296, 72);

this.btnDecrypt.Name = "btnDecrypt";

this.btnDecrypt.Size = new System.Drawing.Size(72, 32);

this.btnDecrypt.TabIndex = 19;

this.btnDecrypt.Text = "Decrypt";

this.btnDecrypt.Click += new System.EventHandler(this.btnDecrypt_Click);

//

// txtConPassDecrypt

//

this.txtConPassDecrypt.Location = new System.Drawing.Point(104, 88);

this.txtConPassDecrypt.Name = "txtConPassDecrypt";

this.txtConPassDecrypt.PasswordChar = '*';

this.txtConPassDecrypt.Size = new System.Drawing.Size(184, 20);

this.txtConPassDecrypt.TabIndex = 18;

//

// txtPassDecrypt

//

this.txtPassDecrypt.Location = new System.Drawing.Point(104, 64);

this.txtPassDecrypt.Name = "txtPassDecrypt";

this.txtPassDecrypt.PasswordChar = '*';

this.txtPassDecrypt.Size = new System.Drawing.Size(184, 20);

this.txtPassDecrypt.TabIndex = 17;

//

// Label6

//

this.Label6.Location = new System.Drawing.Point(16, 8);

this.Label6.Name = "Label6";

this.Label6.Size = new System.Drawing.Size(80, 16);

this.Label6.TabIndex = 16;

this.Label6.Text = "File to decrypt:";

this.Label6.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// Label7

//

this.Label7.Location = new System.Drawing.Point(-8, 88);

this.Label7.Name = "Label7";

this.Label7.Size = new System.Drawing.Size(104, 16);

this.Label7.TabIndex = 15;

this.Label7.Text = "Confirm password:";

this.Label7.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// Label8

//

this.Label8.Location = new System.Drawing.Point(8, 64);

this.Label8.Name = "Label8";

this.Label8.Size = new System.Drawing.Size(88, 16);

this.Label8.TabIndex = 14;

this.Label8.Text = "Type password:";

this.Label8.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// btnBrowseDecrypt

//

this.btnBrowseDecrypt.Location = new System.Drawing.Point(296, 8);

this.btnBrowseDecrypt.Name = "btnBrowseDecrypt";

this.btnBrowseDecrypt.Size = new System.Drawing.Size(72, 21);

this.btnBrowseDecrypt.TabIndex = 13;

this.btnBrowseDecrypt.Text = "Browse";

this.btnBrowseDecrypt.Click += new System.EventHandler(this.btnBrowseDecrypt_Click);

//

// txtFileToDecrypt

//

this.txtFileToDecrypt.Location = new System.Drawing.Point(104, 8);

this.txtFileToDecrypt.Name = "txtFileToDecrypt";

this.txtFileToDecrypt.ReadOnly = true;

this.txtFileToDecrypt.Size = new System.Drawing.Size(184, 20);

this.txtFileToDecrypt.TabIndex = 12;

this.txtFileToDecrypt.Text = "Click Browse to load file.";

//

// pbStatus

//

this.pbStatus.Location = new System.Drawing.Point(0, 144);

this.pbStatus.Name = "pbStatus";

this.pbStatus.Size = new System.Drawing.Size(384, 16);

this.pbStatus.TabIndex = 1;

//

// encmain

//

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(382, 156);

this.Controls.Add(this.pbStatus);

this.Controls.Add(this.TabControl1);

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;

this.Name = "encmain";

this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;

this.Text = "Encrypt / Decrypt File (Using Rijndael)";

this.TabControl1.ResumeLayout(false);

this.TabPage1.ResumeLayout(false);

this.TabPage1.PerformLayout();

this.TabPage2.ResumeLayout(false);

this.TabPage2.PerformLayout();

this.ResumeLayout(false);

}

#endregion

#region 1. Global Variables

//*************************

//** Global Variables

//*************************

private string strFileToEncrypt;

private string strFileToDecrypt;

private string strOutputEncrypt;

private string strOutputDecrypt;

private System.IO.FileStream fsInput;

private System.IO.FileStream fsOutput;

#endregion

#region 2. Create A Key

//*************************

//** Create A Key

//*************************

private byte[] CreateKey(string strPassword)

{

//Convert strPassword to an array and store in chrData.

char[] chrData = strPassword.ToCharArray();

//Use intLength to get strPassword size.

int intLength = chrData.GetUpperBound(0);

//Declare bytDataToHash and make it the same size as chrData.

byte[] bytDataToHash = new byte[intLength + 1];

//Use For Next to convert and store chrData into bytDataToHash.

for (int i = 0; i <= chrData.GetUpperBound(0); i++)

{

bytDataToHash[i] = System.Convert.ToByte(System.Convert.ToInt32(chrData[i]));

}

//Declare what hash to use.

System.Security.Cryptography.SHA512Managed SHA512 = new System.Security.Cryptography.SHA512Managed();

//Declare bytResult, Hash bytDataToHash and store it in bytResult.

byte[] bytResult = SHA512.ComputeHash(bytDataToHash);

//Declare bytKey(31). It will hold 256 bits.

byte[] bytKey = new byte[32];

//Use For Next to put a specific size (256 bits) of

//bytResult into bytKey. The 0 To 31 will put the first 256 bits

//of 512 bits into bytKey.

for (int i = 0; i <= 31; i++)

{

bytKey[i] = bytResult[i];

}

return bytKey; //Return the key.

}

#endregion

#region 3. Create An IV

//*************************

//** Create An IV

//*************************

private byte[] CreateIV(string strPassword)

{

//Convert strPassword to an array and store in chrData.

char[] chrData = strPassword.ToCharArray();

//Use intLength to get strPassword size.

int intLength = chrData.GetUpperBound(0);

//Declare bytDataToHash and make it the same size as chrData.

byte[] bytDataToHash = new byte[intLength + 1];

//Use For Next to convert and store chrData into bytDataToHash.

for (int i = 0; i <= chrData.GetUpperBound(0); i++)

{

bytDataToHash[i] = System.Convert.ToByte(System.Convert.ToInt32(chrData[i]));

}

//Declare what hash to use.

System.Security.Cryptography.SHA512Managed SHA512 = new System.Security.Cryptography.SHA512Managed();

//Declare bytResult, Hash bytDataToHash and store it in bytResult.

byte[] bytResult = SHA512.ComputeHash(bytDataToHash);

//Declare bytIV(15). It will hold 128 bits.

byte[] bytIV = new byte[16];

//Use For Next to put a specific size (128 bits) of

//bytResult into bytIV. The 0 To 30 for bytKey used the first 256 bits.

//of the hashed password. The 32 To 47 will put the next 128 bits into bytIV.

for (int i = 32; i <= 47; i++)

{

bytIV[i - 32] = bytResult[i];

}

return bytIV; //return the IV

}

#endregion

#region 4. Encrypt / Decrypt File

//****************************

//** Encrypt/Decrypt File

//****************************

private enum CryptoAction: int

{

//Define the enumeration for CryptoAction.

ActionEncrypt = 1,

ActionDecrypt = 2

}

private void EncryptOrDecryptFile(string strInputFile, string strOutputFile, byte[] bytKey, byte[] bytIV, CryptoAction Direction)

{

try //In case of errors.

{

//Setup file streams to handle input and output.

fsInput = new System.IO.FileStream(strInputFile, FileMode.Open, FileAccess.Read);

fsOutput = new System.IO.FileStream(strOutputFile, FileMode.OpenOrCreate, FileAccess.Write);

fsOutput.SetLength(0); //make sure fsOutput is empty

//Declare variables for encrypt/decrypt process.

byte[] bytBuffer = new byte[4097]; //holds a block of bytes for processing

long lngBytesProcessed = 0; //running count of bytes processed

long lngFileLength = fsInput.Length; //the input file's length

int intBytesInCurrentBlock = 0; //current bytes being processed

CryptoStream csCryptoStream = null;

//Declare your CryptoServiceProvider.

System.Security.Cryptography.RijndaelManaged cspRijndael = new System.Security.Cryptography.RijndaelManaged();

//Setup Progress Bar

pbStatus.Value = 0;

pbStatus.Maximum = 100;

//Determine if ecryption or decryption and setup CryptoStream.

switch (Direction)

{

case CryptoAction.ActionEncrypt:

csCryptoStream = new CryptoStream(fsOutput, cspRijndael.CreateEncryptor(bytKey, bytIV), CryptoStreamMode.Write);

break;

case CryptoAction.ActionDecrypt:

csCryptoStream = new CryptoStream(fsOutput, cspRijndael.CreateDecryptor(bytKey, bytIV), CryptoStreamMode.Write);

break;

}

//Use While to loop until all of the file is processed.

while (lngBytesProcessed < lngFileLength)

{

//Read file with the input filestream.

intBytesInCurrentBlock = fsInput.Read(bytBuffer, 0, 4096);

//Write output file with the cryptostream.

csCryptoStream.Write(bytBuffer, 0, intBytesInCurrentBlock);

//Update lngBytesProcessed

lngBytesProcessed = lngBytesProcessed + System.Convert.ToInt64(intBytesInCurrentBlock);

//Update Progress Bar

pbStatus.Value = System.Convert.ToInt32((lngBytesProcessed / (double)lngFileLength) * 100);

}

//Close FileStreams and CryptoStream.

csCryptoStream.Close();

fsInput.Close();

fsOutput.Close();

//If encrypting then delete the original unencrypted file.

if (Direction == CryptoAction.ActionEncrypt)

{

FileInfo fileOriginal = new FileInfo(strFileToEncrypt);

fileOriginal.Delete();

}

//If decrypting then delete the encrypted file.

if (Direction == CryptoAction.ActionDecrypt)

{

FileInfo fileEncrypted = new FileInfo(strFileToDecrypt);

fileEncrypted.Delete();

}

//Update the user when the file is done.

string Wrap = "\r" + "\n";

if (Direction == CryptoAction.ActionEncrypt)

{

MessageBox.Show("Encryption Complete" + Wrap + Wrap + "Total bytes processed = " + lngBytesProcessed.ToString(), "Done", MessageBoxButtons.OK, MessageBoxIcon.Information);

//Update the progress bar and textboxes.

pbStatus.Value = 0;

txtFileToEncrypt.Text = "Click Browse to load file.";

txtPassEncrypt.Text = "";

txtConPassEncrypt.Text = "";

txtDestinationEncrypt.Text = "";

btnChangeEncrypt.Enabled = false;

btnEncrypt.Enabled = false;

}

else

{

//Update the user when the file is done.

MessageBox.Show("Decryption Complete" + Wrap + Wrap + "Total bytes processed = " + lngBytesProcessed.ToString(), "Done", MessageBoxButtons.OK, MessageBoxIcon.Information);

//Update the progress bar and textboxes.

pbStatus.Value = 0;

txtFileToDecrypt.Text = "Click Browse to load file.";

txtPassDecrypt.Text = "";

txtConPassDecrypt.Text = "";

txtDestinationDecrypt.Text = "";

btnChangeDecrypt.Enabled = false;

btnDecrypt.Enabled = false;

}

//Catch file not found error.

}

//TODO: INSTANT C# TODO TASK: There is no C# equivalent to 'When'

//TODO: INSTANT C# TODO TASK: Calls to the VB 'Err' object are not converted by Instant C#:

catch // When Err.Number = 53 //if file not found

{

MessageBox.Show("Please check to make sure the path and filename" + "are correct and if the file exists.", "Invalid Path or Filename", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

//Catch all other errors. And delete partial files.

fsInput.Close();

fsOutput.Close();

if (Direction == CryptoAction.ActionDecrypt)

{

FileInfo fileDelete = new FileInfo(txtDestinationDecrypt.Text);

fileDelete.Delete();

pbStatus.Value = 0;

txtPassDecrypt.Text = "";

txtConPassDecrypt.Text = "";

MessageBox.Show("Please check to make sure that you entered the correct" + "password.", "Invalid Password", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

}

else

{

FileInfo fileDelete = new FileInfo(txtDestinationEncrypt.Text);

fileDelete.Delete();

pbStatus.Value = 0;

txtPassEncrypt.Text = "";

txtConPassEncrypt.Text = "";

MessageBox.Show("This file cannot be encrypted.", "Invalid File", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

}

}

}

#endregion

#region 5. Browse / Change Button

//******************************

//** Browse/Change Buttons

//******************************

private void btnBrowseEncrypt_Click(object sender, System.EventArgs e)

{

//Setup the open dialog.

OpenFileDialog.FileName = "";

OpenFileDialog.Title = "Choose a file to encrypt";

OpenFileDialog.InitialDirectory = "C:\\";

OpenFileDialog.Filter = "All Files (*.*) | *.*";

//Find out if the user chose a file.

if (OpenFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

strFileToEncrypt = OpenFileDialog.FileName;

txtFileToEncrypt.Text = strFileToEncrypt;

int iPosition = 0;

int i = 0;

//Get the position of the last "\" in the OpenFileDialog.FileName path.

//-1 is when the character your searching for is not there.

//IndexOf searches from left to right.

while (strFileToEncrypt.IndexOf('\\', i) != -1)

{

iPosition = strFileToEncrypt.IndexOf('\\', i);

i = iPosition + 1;

}

//Assign strOutputFile to the position after the last "\" in the path.

//This position is the beginning of the file name.

strOutputEncrypt = strFileToEncrypt.Substring(iPosition + 1);

//Assign S the entire path, ending at the last "\".

string S = strFileToEncrypt.Substring(0, iPosition + 1);

//Replace the "." in the file extension with "_".

strOutputEncrypt = strOutputEncrypt.Replace('.', '_');

//The final file name. XXXXX.encrypt

txtDestinationEncrypt.Text = S + strOutputEncrypt + ".encrypt";

//Update buttons.

btnEncrypt.Enabled = true;

btnChangeEncrypt.Enabled = true;

}

}

private void btnBrowseDecrypt_Click(object sender, System.EventArgs e)

{

//Setup the open dialog.

OpenFileDialog.FileName = "";

OpenFileDialog.Title = "Choose a file to decrypt";

OpenFileDialog.InitialDirectory = "C:\\";

OpenFileDialog.Filter = "Encrypted Files (*.encrypt) | *.encrypt";

//Find out if the user chose a file.

if (OpenFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

strFileToDecrypt = OpenFileDialog.FileName;

txtFileToDecrypt.Text = strFileToDecrypt;

int iPosition = 0;

int i = 0;

//Get the position of the last "\" in the OpenFileDialog.FileName path.

//-1 is when the character your searching for is not there.

//IndexOf searches from left to right.

while (strFileToDecrypt.IndexOf('\\', i) != -1)

{

iPosition = strFileToDecrypt.IndexOf('\\', i);

i = iPosition + 1;

}

//strOutputFile = the file path minus the last 8 characters (.encrypt)

strOutputDecrypt = strFileToDecrypt.Substring(0, strFileToDecrypt.Length - 8);

//Assign S the entire path, ending at the last "\".

string S = strFileToDecrypt.Substring(0, iPosition + 1);

//Assign strOutputFile to the position after the last "\" in the path.

strOutputDecrypt = strOutputDecrypt.Substring((iPosition + 1));

//Replace "_" with "."

txtDestinationDecrypt.Text = S + strOutputDecrypt.Replace('_', '.');

//Update buttons

btnDecrypt.Enabled = true;

btnChangeDecrypt.Enabled = true;

}

}

private void btnChangeEncrypt_Click(object sender, System.EventArgs e)

{

//Setup up folder browser.

FolderBrowserDialog.Description = "Select a folder to place the encrypted file in.";

//If the user selected a folder assign the path to txtDestinationEncrypt.

if (FolderBrowserDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

txtDestinationEncrypt.Text = FolderBrowserDialog.SelectedPath + "\\" + strOutputEncrypt + ".encrypt";

}

}

private void btnChangeDecrypt_Click(object sender, System.EventArgs e)

{

//Setup up folder browser.

FolderBrowserDialog.Description = "Select a folder for to place the decrypted file in.";

//If the user selected a folder assign the path to txtDestinationDecrypt.

if (FolderBrowserDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

txtDestinationDecrypt.Text = FolderBrowserDialog.SelectedPath + "\\" + strOutputDecrypt.Replace('_', '.');

}

}

#endregion

#region 6. Encrypt / Decrypt Buttons

//******************************

//** Encrypt/Decrypt Buttons

//******************************

private void btnEncrypt_Click(object sender, System.EventArgs e)

{

//Make sure the password is correct.

if (txtConPassEncrypt.Text == txtPassEncrypt.Text)

{

//Declare variables for the key and iv.

//The key needs to hold 256 bits and the iv 128 bits.

byte[] bytKey = null;

byte[] bytIV = null;

//Send the password to the CreateKey function.

bytKey = CreateKey(txtPassEncrypt.Text);

//Send the password to the CreateIV function.

bytIV = CreateIV(txtPassEncrypt.Text);

//Start the encryption.

EncryptOrDecryptFile(strFileToEncrypt, txtDestinationEncrypt.Text, bytKey, bytIV, CryptoAction.ActionEncrypt);

}

else

{

MessageBox.Show("Please re-enter your password.", string.Empty, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

txtPassEncrypt.Text = "";

txtConPassEncrypt.Text = "";

}

}

private void btnDecrypt_Click(object sender, System.EventArgs e)

{

//Make sure the password is correct.

if (txtConPassDecrypt.Text == txtPassDecrypt.Text)

{

//Declare variables for the key and iv.

//The key needs to hold 256 bits and the iv 128 bits.

byte[] bytKey = null;

byte[] bytIV = null;

//Send the password to the CreateKey function.

bytKey = CreateKey(txtPassDecrypt.Text);

//Send the password to the CreateIV function.

bytIV = CreateIV(txtPassDecrypt.Text);

//Start the decryption.

EncryptOrDecryptFile(strFileToDecrypt, txtDestinationDecrypt.Text, bytKey, bytIV, CryptoAction.ActionDecrypt);

}

else

{

MessageBox.Show("Please re-enter your password.", string.Empty, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

txtPassDecrypt.Text = "";

txtConPassDecrypt.Text = "";

}

}

#endregion

}