// реализация кнопки, отвечающей за дешифровку сообщения из зашифрованного файла
private void button3_Click(object sender, EventArgs e)
{
WavFile wavFile = new WavFile();
FileStream fsr = new FileStream(textBox1.Text, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fsr);
wavFile.sGroupID = r.ReadChars(4);
wavFile.dwFileLength = r.ReadUInt32();
wavFile.sRiffType = r.ReadChars(4);
wavFile.sFChunkID = r.ReadChars(4);
wavFile.dwFChunkSize = r.ReadUInt32();
wavFile.wFormatTag = r.ReadUInt16();
wavFile.wChannels = r.ReadUInt16();
wavFile.dwSamplesPerSec = r.ReadUInt32();
wavFile.dwAvgBytesPerSec = r.ReadUInt32();
wavFile.wBlockAlign = r.ReadUInt16();
wavFile.wBitsPerSample = r.ReadUInt16();
wavFile.sDChunkID = r.ReadChars(4);
wavFile.dwDChunkSize = r.ReadUInt32();
wavFile.dataStartPos = (byte)r.BaseStream.Position;
r.Close();
fsr.Close();
string decodedMessage = wavFile.EncryptFile(textBox1.Text);
richTextBox2.Text = decodedMessage;
}
private void button2_Click(object sender, EventArgs e)
{
WavFile wavFile = new WavFile();
FileStream fsr = new FileStream(textBox1.Text, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fsr);
wavFile.sGroupID = r.ReadChars(4);
wavFile.dwFileLength = r.ReadUInt32();
wavFile.sRiffType = r.ReadChars(4);
wavFile.sFChunkID = r.ReadChars(4);
wavFile.dwFChunkSize = r.ReadUInt32();
wavFile.wFormatTag = r.ReadUInt16();
wavFile.wChannels = r.ReadUInt16();
wavFile.dwSamplesPerSec = r.ReadUInt32();
wavFile.dwAvgBytesPerSec = r.ReadUInt32();
wavFile.wBlockAlign = r.ReadUInt16();
wavFile.wBitsPerSample = r.ReadUInt16();
wavFile.sDChunkID = r.ReadChars(4);
wavFile.dwDChunkSize = r.ReadUInt32();
wavFile.dataStartPos = (byte)r.BaseStream.Position;
r.Close();
fsr.Close();
SaveFileDialog saveFile = new SaveFileDialog();
saveFile.Filter = "Wav files (*.WAV)|*.wav";
int bytesPerSample = Convert.ToInt32(textBox4.Text) / 8;
if (saveFile.ShowDialog() == DialogResult.OK)
{
textBox5.Text = saveFile.FileName.ToString();
//wavFile.WriteWav(textBox1.Text, textBox5.Text);
wavFile.WriteFile(textBox1.Text, textBox5.Text, richTextBox1.Text);
}
}
public string Analyze(WavFile file2, string path1, string path2)
{
byte DataPos1 = this.dataStartPos;
byte DataPos2 = file2.dataStartPos;
byte[] source1, source2;
using (BinaryReader b1 = new BinaryReader(File.Open(path1, FileMode.Open)))
{
int length1 = (int)b1.BaseStream.Length;
source1 = b1.ReadBytes(length1);
}
using (BinaryReader b2 = new BinaryReader(File.Open(path2, FileMode.Open)))
{
int length2 = (int)b2.BaseStream.Length;
source2 = b2.ReadBytes(length2);
}
int arrlen = source1.Length - (DataPos1 + 1);
int[] NumberArray = new int[arrlen];
for (int i = 0; i < arrlen; i++)
{
NumberArray[i] = 0;
}
string str = "Номера измененных байтов данных в файле:";
int step = 0;
for (int i = DataPos2 + 1; i < source2.Length; i++)
{
if (source2[i] != source1[i])
{
NumberArray[step] = i;
step++;
}
}
for (int i = 0; i < arrlen; i++)
{
if (NumberArray[i] != 0)
{
str += " " + Convert.ToString(NumberArray[i]);
}
}
if (str == "Номера измененных байтов данных в файле:")
{
str = "В части аудиоданных файла изменений нет.";
}
return(str);
}
private void button4_Click(object sender, EventArgs e)
{
WavFile wavFile1 = new WavFile();
FileStream fsr = new FileStream(textBox11.Text, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fsr);
wavFile1.sGroupID = r.ReadChars(4);
wavFile1.dwFileLength = r.ReadUInt32();
wavFile1.sRiffType = r.ReadChars(4);
wavFile1.sFChunkID = r.ReadChars(4);
wavFile1.dwFChunkSize = r.ReadUInt32();
wavFile1.wFormatTag = r.ReadUInt16();
wavFile1.wChannels = r.ReadUInt16();
wavFile1.dwSamplesPerSec = r.ReadUInt32();
wavFile1.dwAvgBytesPerSec = r.ReadUInt32();
wavFile1.wBlockAlign = r.ReadUInt16();
wavFile1.wBitsPerSample = r.ReadUInt16();
wavFile1.sDChunkID = r.ReadChars(4);
wavFile1.dwDChunkSize = r.ReadUInt32();
wavFile1.dataStartPos = (byte)r.BaseStream.Position;
r.Close();
fsr.Close();
WavFile wavFile2 = new WavFile();
FileStream fsr1 = new FileStream(textBox12.Text, FileMode.Open, FileAccess.Read);
BinaryReader r1 = new BinaryReader(fsr1);
wavFile2.sGroupID = r1.ReadChars(4);
wavFile2.dwFileLength = r1.ReadUInt32();
wavFile2.sRiffType = r1.ReadChars(4);
wavFile2.sFChunkID = r1.ReadChars(4);
wavFile2.dwFChunkSize = r1.ReadUInt32();
wavFile2.wFormatTag = r1.ReadUInt16();
wavFile2.wChannels = r1.ReadUInt16();
wavFile2.dwSamplesPerSec = r1.ReadUInt32();
wavFile2.dwAvgBytesPerSec = r1.ReadUInt32();
wavFile2.wBlockAlign = r1.ReadUInt16();
wavFile2.wBitsPerSample = r1.ReadUInt16();
wavFile2.sDChunkID = r1.ReadChars(4);
wavFile2.dwDChunkSize = r1.ReadUInt32();
wavFile2.dataStartPos = (byte)r1.BaseStream.Position;
r1.Close();
fsr1.Close();
richTextBox3.Text = wavFile1.Analyze(wavFile2, textBox11.Text, textBox12.Text);
}
// при открытии файла сразу будем получать исходные данные о нём
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog dialog = new OpenFileDialog();
dialog.Filter = "Wav files (*.WAV)|*.wav";
if (dialog.ShowDialog() == DialogResult.OK)
{
textBox1.Text = dialog.FileName.ToString();
// считываем wav файл, получаем его характеристики, выводим нужные в текстбокс
WavFile wavFile = new WavFile();
FileStream fsr = new FileStream(textBox1.Text, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fsr);
wavFile.sGroupID = r.ReadChars(4);
wavFile.dwFileLength = r.ReadUInt32();
wavFile.sRiffType = r.ReadChars(4);
wavFile.sFChunkID = r.ReadChars(4);
wavFile.dwFChunkSize = r.ReadUInt32();
wavFile.wFormatTag = r.ReadUInt16();
wavFile.wChannels = r.ReadUInt16();
wavFile.dwSamplesPerSec = r.ReadUInt32();
wavFile.dwAvgBytesPerSec = r.ReadUInt32();
wavFile.wBlockAlign = r.ReadUInt16();
wavFile.wBitsPerSample = r.ReadUInt16();
wavFile.sDChunkID = r.ReadChars(4);
wavFile.dwDChunkSize = r.ReadUInt32();
wavFile.dataStartPos = (byte)r.BaseStream.Position;
r.Close();
fsr.Close();
textBox2.Text = Convert.ToString(wavFile.dwSamplesPerSec) + " Гц";
textBox3.Text = Convert.ToString(wavFile.wChannels);
textBox4.Text = Convert.ToString(wavFile.wBitsPerSample);
textBox6.Text = Convert.ToString(wavFile.dwDChunkSize) + " Байт";
textBox7.Text = Convert.ToString(wavFile.dataStartPos);
textBox8.Text = Convert.ToString(wavFile.dwFChunkSize);
textBox9.Text = Convert.ToString(wavFile.wBlockAlign);
textBox10.Text = Convert.ToString(wavFile.dwAvgBytesPerSec);
}
}
