public static string GetDecryptedTextFromImage(Image image)
{
Bitmap img = new Bitmap(image);
int maxLinear = image.Width * image.Height;
SeedRNG generator = new SeedRNG((maxLinear + image.Width).GetHashCode(), maxLinear);
OutputConsole.Write("Seed generated");
string pass = string.Format("{0}x{1}={2}", image.Width, image.Height, maxLinear);
AESEncrypt encrypt = new AESEncrypt();
string text = string.Empty;
int value=0;
OutputConsole.Write("Processing image...");
do
{
Point point = LinearIndexToPoint(generator.Next, image.Width, image.Height);
Color pixel = img.GetPixel(point.X, point.Y);
value = DecodePixel(pixel);
if (value != 0)
text += Convert.ToChar(value);
} while (value != 0);
try
{
OutputConsole.Write(string.Format("String found: \n{0}", text));
OutputConsole.Write("Decrypting text...");
return encrypt.DecryptString(text, pass);
}
catch (Exception e)
{
OutputConsole.Write("Error: Text not found");
Console.WriteLine(e.Message);
return null;
}
}
public static string GetDecryptedTextFromImageLinear(Image image)
{
Bitmap img = new Bitmap(image);
int maxLinear = image.Width * image.Height;
string pass = string.Format("{0}x{1}={2}", image.Width, image.Height, maxLinear);
AESEncrypt encrypt = new AESEncrypt();
string text = string.Empty;
int value = 0;
int i = 0;
OutputConsole.Write("Processing image...");
do
{
Point point = LinearIndexToPoint(i, image.Width, image.Height);
Color pixel = img.GetPixel(point.X, point.Y);
value = DecodePixel(pixel);
i++;
if (value != 255)
{
text += Convert.ToChar(value);
}
} while (value != 255);
try
{
OutputConsole.Write(string.Format("String found: \n{0}", text));
OutputConsole.Write("Decrypting text...");
return(encrypt.DecryptString(text, pass));
}
catch (Exception e)
{
OutputConsole.Write("Error: Text not found");
Console.WriteLine(e.Message);
return(null);
}
}
public static string DecryptTextLinear(byte[] wav)
{
WavAudio audio = new WavAudio(wav);
string text = string.Empty;
uint n = 0;
uint value = 0;
string pass = string.Format(audio.bitsPerSample.ToString());
AESEncrypt encrypt = new AESEncrypt();
OutputConsole.Write("Processing wav file...");
do
{
value = 0;
for (int x = 0; x < 8; x++)
{
uint sample = n;
uint sampleValue = audio.samples[sample];
value = value | ((sampleValue & 1) << x);
n++;
}
if (value != 0)
{
text += Convert.ToChar(value);
}
} while (value != 0);
OutputConsole.Write("Decrypting text...");
try
{
return(encrypt.DecryptString(text, pass));
}
catch (Exception e)
{
OutputConsole.Write("Error: Text not found");
Console.WriteLine(e.Message);
return(null);
}
}
public static string DecryptTextLinear(byte[] wav)
{
WavAudio audio = new WavAudio(wav);
string text = string.Empty;
uint n = 0;
uint value = 0;
string pass = string.Format(audio.bitsPerSample.ToString());
AESEncrypt encrypt = new AESEncrypt();
OutputConsole.Write("Processing wav file...");
do
{
value = 0;
for (int x = 0; x < 8; x++)
{
uint sample = n;
uint sampleValue = audio.samples[sample];
value = value | ((sampleValue & 1) << x);
n++;
}
if (value != 0)
text += Convert.ToChar(value);
} while (value != 0);
OutputConsole.Write("Decrypting text...");
try
{
return encrypt.DecryptString(text, pass);
}
catch (Exception e)
{
OutputConsole.Write("Error: Text not found");
Console.WriteLine(e.Message);
return null;
}
}
