示例#1
0
 private bool blowFish()
 {
     bool ok = false;
     Stream stream = openFileDialog1.OpenFile();
     if (keyTextBox.Text.Length > 0)
     {
         if (keyTextBox.Text.Length >= 8)
         {
             byte[] key;
             if (hexStringFlag.Checked)
                 key = Encryption.GetBytesFromHexString(keyTextBox.Text);
             else
                 key = Encryption.GetBytes(keyTextBox.Text);
             currentEncryption = new SHA256_Blowfish(key, stream);
             ok = true;
         }
         else
             MessageBox.Show("Blowfish needs atleast 8 bytes/characters as key");
     }
     else
     {
         hexStringFlag.Checked = true;
         currentEncryption = new SHA256_Blowfish(stream);
         ok = true;
     }
     this.preEncryption = normalPreEncryption;
     this.duringEncryption = normalDuringEncryption;
     this.postEncrtypion = normalPostEncryption;
     return ok;
 }
示例#2
0
        private void DecryptButton_Click(object sender, EventArgs e)
        {
            currentOperation = OPERATION_DECRYPTION;
            switch (algorithmList.SelectedIndex)
            {
                case CAESARS_CIPHER:
                                    {
                                        Stream stream = openFileDialog1.OpenFile();
                                        try
                                        {
                                            currentEncryption = new CaesarsCipherEncryption(stream, new Bitmap(100, 100));
                                            ((CaesarsCipherEncryption)currentEncryption).DestinationFolder = destinationFileList.Text;
                                            EncryptionMeta output = new EncryptionMeta();
                                            if (keyTextBox.Text.Length > 0)
                                            {
                                                output.Key = keyTextBox.Text;
                                                output.Output = new Bitmap(stream);
                                                stream.Close();
                                                this.currentEncryption.Output = output;
                                                EncryptAndDecryptFunction(false);
                                            }
                                            else
                                            {
                                                MessageBox.Show("Please input key.", "Error");
                                                keyTextBox.Focus();
                                            }
                                        }
                                        catch (FileNotFoundException)
                                        {
                                            MessageBox.Show("No file selected", "Error");
                                        }
                                    }
                                    break;
                case BLOWFISH:
                                {
                                    Stream stream = openFileDialog1.OpenFile();
                                    byte[] key;
                                    if (hexStringFlag.Checked)
                                        key = Encryption.GetBytesFromHexString(keyTextBox.Text);
                                    else
                                        key = Encryption.GetBytes(keyTextBox.Text);
                                    currentEncryption = new SHA256_Blowfish(key, null);
                                    ((SHA256_Blowfish)currentEncryption).DestinationFolder = destinationFileList.Text;
                                    EncryptionMeta output = new EncryptionMeta();
                                    if (keyTextBox.Text.Length > 0)
                                    {
                                        output.Key = keyTextBox.Text;
                                        output.Output = new Bitmap(stream);
                                        Color color = output.Output.GetPixel(0, 0);
                                        stream.Close();
                                        currentEncryption.Output = output;
                                        EncryptAndDecryptFunction(false);
                                    }

                                }
                                break;
                case OSIAS_ENCRYPTION:
                    {
                        if (keyTextBox.Text.Length > 0)
                        {
                            currentEncryption = new OSIASEncryption(null);
                            OSIASEncryption enc = (OSIASEncryption)currentEncryption;
                            enc.DataBitmap = new Bitmap(openFileDialog1.FileName);
                            enc.KeyBitMap = new Bitmap(openFileDialog2.FileName);
                            enc.Source = new FileStream(destinationFileList.Text + "\\output", FileMode.OpenOrCreate);
                            this.preEncryption = normalPreEncryption;
                            this.duringEncryption = normalDuringEncryption;
                            this.postEncrtypion = OsiasPostDecryption;
                            EncryptAndDecryptFunction(false);
                        }

                    }
                    break;

            }
        }
示例#3
0
 private bool osiasEncryption()
 {
     bool ok = false;
     Stream stream = openFileDialog1.OpenFile();
     this.currentEncryption = new OSIASEncryption(stream);
     this.preEncryption = normalPreEncryption;
     this.duringEncryption = normalDuringEncryption;
     this.postEncrtypion = OsiasPostEncryption;
     ok = true;
     return ok;
 }
示例#4
0
 private bool caesarscipher()
 {
     bool ok = false;
     Stream stream = openFileDialog1.OpenFile();
     this.currentEncryption = new CaesarsCipherEncryption(stream, new Bitmap(100, 100), keyTextBox.Text);
     this.preEncryption = normalPreEncryption;
     this.duringEncryption = normalDuringEncryption;
     this.postEncrtypion = normalPostEncryption;
     ok = true;
     return ok;
 }